Mercurial > hg > xemacs-beta
annotate src/fileio.c @ 5273:799742b751c8
Accept circular lists where that is useful in #'mapcar*, #'map* and friends.
src/ChangeLog addition:
2010-09-16 Aidan Kehoe <kehoea@parhasard.net>
* fns.c (Flist_length): New, moved here from cl-extra.el, needed
by the next function.
(shortest_length_among_sequences): New.
(Fmapconcat, FmapcarX, Fmapvector, Fmapcan, Fmapc, Fmap)
(Fmap_into, Fsome, Fevery):
Use shortest_length_among_sequences() when working out how many
iterations to do, only giving circular list errors if all
arguments are circular.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Thu, 16 Sep 2010 20:34:49 +0100 |
| parents | cdca98f2d36f |
| children | c096d8051f89 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 /* File IO for XEmacs. |
| 2 Copyright (C) 1985-1988, 1992-1995 Free Software Foundation, Inc. | |
|
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3 Copyright (C) 1996, 2001, 2002, 2003, 2004, 2010 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: Mule 2.0, FSF 19.30. */ | |
| 771 | 23 /* More syncing: FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> |
| 24 (Note: Sync messages from Marc Paquette may indicate | |
| 25 incomplete synching, so beware.) */ | |
| 2526 | 26 /* Some functions synched with FSF 21.0.103. */ |
| 771 | 27 /* Mule-ized completely except for the #if 0-code including decrypt-string |
| 28 and encrypt-string. --ben 7-2-00 */ | |
| 1333 | 29 /* #if 0-code Mule-ized, 2-22-03. --ben */ |
| 771 | 30 |
| 428 | 31 |
| 32 #include <config.h> | |
| 33 #include "lisp.h" | |
| 34 | |
| 35 #include "buffer.h" | |
| 800 | 36 #include "device.h" |
| 428 | 37 #include "events.h" |
| 800 | 38 #include "file-coding.h" |
| 428 | 39 #include "frame.h" |
| 40 #include "insdel.h" | |
| 41 #include "lstream.h" | |
| 2526 | 42 #include "profile.h" |
| 872 | 43 #include "process.h" |
| 428 | 44 #include "redisplay.h" |
| 45 #include "sysdep.h" | |
| 872 | 46 #include "window-impl.h" |
| 771 | 47 |
| 428 | 48 #include "sysfile.h" |
| 49 #include "sysproc.h" | |
| 50 #include "syspwd.h" | |
| 51 #include "systime.h" | |
| 52 #include "sysdir.h" | |
| 53 | |
| 54 #ifdef HPUX | |
| 55 #include <netio.h> | |
| 56 #endif /* HPUX */ | |
| 57 | |
| 1315 | 58 #ifdef WIN32_ANY |
| 657 | 59 #define WIN32_FILENAMES |
| 771 | 60 #include "syswindows.h" |
| 428 | 61 #define IS_DRIVE(x) isalpha (x) |
| 62 /* Need to lower-case the drive letter, or else expanded | |
| 63 filenames will sometimes compare inequal, because | |
| 64 `expand-file-name' doesn't always down-case the drive letter. */ | |
| 65 #define DRIVE_LETTER(x) tolower (x) | |
| 657 | 66 #endif /* WIN32_NATIVE || CYGWIN */ |
| 428 | 67 |
| 68 int lisp_to_time (Lisp_Object, time_t *); | |
| 69 Lisp_Object time_to_lisp (time_t); | |
| 70 | |
| 71 /* Nonzero during writing of auto-save files */ | |
| 72 static int auto_saving; | |
| 73 | |
| 74 /* Set by auto_save_1 to mode of original file so Fwrite_region_internal | |
| 75 will create a new file with the same mode as the original */ | |
| 76 static int auto_save_mode_bits; | |
| 77 | |
| 78 /* Alist of elements (REGEXP . HANDLER) for file names | |
| 79 whose I/O is done with a special handler. */ | |
| 80 Lisp_Object Vfile_name_handler_alist; | |
| 81 | |
| 82 /* Format for auto-save files */ | |
| 83 Lisp_Object Vauto_save_file_format; | |
| 84 | |
| 85 /* Lisp functions for translating file formats */ | |
| 86 Lisp_Object Qformat_decode, Qformat_annotate_function; | |
| 87 | |
| 88 /* Functions to be called to process text properties in inserted file. */ | |
| 89 Lisp_Object Vafter_insert_file_functions; | |
| 90 | |
| 91 /* Functions to be called to create text property annotations for file. */ | |
| 92 Lisp_Object Vwrite_region_annotate_functions; | |
| 93 | |
| 94 /* During build_annotations, each time an annotation function is called, | |
| 95 this holds the annotations made by the previous functions. */ | |
| 96 Lisp_Object Vwrite_region_annotations_so_far; | |
| 97 | |
| 98 /* File name in which we write a list of all our auto save files. */ | |
| 99 Lisp_Object Vauto_save_list_file_name; | |
| 100 | |
| 444 | 101 /* Prefix used to construct Vauto_save_list_file_name. */ |
| 102 Lisp_Object Vauto_save_list_file_prefix; | |
| 103 | |
| 104 /* When non-nil, it prevents auto-save list file creation. */ | |
| 105 int inhibit_auto_save_session; | |
| 106 | |
| 428 | 107 int disable_auto_save_when_buffer_shrinks; |
| 108 | |
| 109 Lisp_Object Vdirectory_sep_char; | |
| 110 | |
|
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111 int default_file_system_ignore_case; |
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112 |
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113 #ifdef HAVE_FSYNC |
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114 /* Nonzero means skip the call to fsync in Fwrite-region. */ |
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115 int write_region_inhibit_fsync; |
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116 #endif |
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117 |
| 428 | 118 /* These variables describe handlers that have "already" had a chance |
| 119 to handle the current operation. | |
| 120 | |
| 121 Vinhibit_file_name_handlers is a list of file name handlers. | |
| 122 Vinhibit_file_name_operation is the operation being handled. | |
| 123 If we try to handle that operation, we ignore those handlers. */ | |
| 124 | |
| 125 static Lisp_Object Vinhibit_file_name_handlers; | |
| 126 static Lisp_Object Vinhibit_file_name_operation; | |
| 127 | |
| 563 | 128 Lisp_Object Qfile_already_exists; |
| 4266 | 129 Lisp_Object Qexcl; |
| 428 | 130 |
| 131 Lisp_Object Qauto_save_hook; | |
| 132 Lisp_Object Qauto_save_error; | |
| 133 Lisp_Object Qauto_saving; | |
| 134 | |
| 135 Lisp_Object Qcar_less_than_car; | |
| 136 | |
| 137 Lisp_Object Qcompute_buffer_file_truename; | |
| 138 | |
| 2526 | 139 Lisp_Object QSin_expand_file_name; |
| 140 | |
| 428 | 141 EXFUN (Frunning_temacs_p, 0); |
| 142 | |
| 563 | 143 DOESNT_RETURN |
| 144 report_error_with_errno (Lisp_Object errtype, | |
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145 const Ascbyte *reason, Lisp_Object data) |
| 563 | 146 { |
|
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147 signal_error_2 (errtype, reason, lisp_strerror (errno), data); |
| 563 | 148 } |
| 149 | |
| 428 | 150 /* signal a file error when errno contains a meaningful value. */ |
| 151 | |
| 152 DOESNT_RETURN | |
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153 report_file_error (const Ascbyte *reason, Lisp_Object data) |
| 428 | 154 { |
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155 report_error_with_errno (Qfile_error, reason, data); |
| 428 | 156 } |
| 157 | |
| 158 | |
| 159 /* Just like strerror(3), except return a lisp string instead of char *. | |
| 160 The string needs to be converted since it may be localized. | |
| 771 | 161 */ |
| 428 | 162 Lisp_Object |
| 163 lisp_strerror (int errnum) | |
| 164 { | |
| 771 | 165 Extbyte *ret = strerror (errnum); |
| 166 if (!ret) | |
| 167 { | |
| 867 | 168 Ibyte ffff[99]; |
| 771 | 169 qxesprintf (ffff, "Unknown error %d", errnum); |
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170 return build_istring (ffff); |
| 771 | 171 } |
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172 return build_extstring (ret, Qstrerror_encoding); |
| 428 | 173 } |
| 174 | |
| 175 static Lisp_Object | |
| 176 close_file_unwind (Lisp_Object fd) | |
| 177 { | |
| 178 if (CONSP (fd)) | |
| 179 { | |
| 180 if (INTP (XCAR (fd))) | |
| 771 | 181 retry_close (XINT (XCAR (fd))); |
| 428 | 182 |
| 853 | 183 free_cons (fd); |
| 428 | 184 } |
| 185 else | |
| 771 | 186 retry_close (XINT (fd)); |
| 428 | 187 |
| 188 return Qnil; | |
| 189 } | |
| 190 | |
| 191 static Lisp_Object | |
| 192 delete_stream_unwind (Lisp_Object stream) | |
| 193 { | |
| 194 Lstream_delete (XLSTREAM (stream)); | |
| 195 return Qnil; | |
| 196 } | |
| 197 | |
| 198 /* Restore point, having saved it as a marker. */ | |
| 199 | |
| 200 static Lisp_Object | |
| 201 restore_point_unwind (Lisp_Object point_marker) | |
| 202 { | |
| 203 BUF_SET_PT (current_buffer, marker_position (point_marker)); | |
| 204 return Fset_marker (point_marker, Qnil, Qnil); | |
| 205 } | |
| 206 | |
| 207 | |
| 208 Lisp_Object Qexpand_file_name; | |
| 209 Lisp_Object Qfile_truename; | |
| 210 Lisp_Object Qsubstitute_in_file_name; | |
| 211 Lisp_Object Qdirectory_file_name; | |
| 212 Lisp_Object Qfile_name_directory; | |
| 213 Lisp_Object Qfile_name_nondirectory; | |
| 996 | 214 Lisp_Object Qfile_name_sans_extension; |
| 428 | 215 Lisp_Object Qunhandled_file_name_directory; |
| 216 Lisp_Object Qfile_name_as_directory; | |
| 217 Lisp_Object Qcopy_file; | |
| 218 Lisp_Object Qmake_directory_internal; | |
| 219 Lisp_Object Qdelete_directory; | |
| 220 Lisp_Object Qdelete_file; | |
| 221 Lisp_Object Qrename_file; | |
| 222 Lisp_Object Qadd_name_to_file; | |
| 223 Lisp_Object Qmake_symbolic_link; | |
| 844 | 224 Lisp_Object Qmake_temp_name; |
| 428 | 225 Lisp_Object Qfile_exists_p; |
| 226 Lisp_Object Qfile_executable_p; | |
| 227 Lisp_Object Qfile_readable_p; | |
| 228 Lisp_Object Qfile_symlink_p; | |
| 229 Lisp_Object Qfile_writable_p; | |
| 230 Lisp_Object Qfile_directory_p; | |
| 231 Lisp_Object Qfile_regular_p; | |
| 232 Lisp_Object Qfile_accessible_directory_p; | |
| 233 Lisp_Object Qfile_modes; | |
| 234 Lisp_Object Qset_file_modes; | |
| 235 Lisp_Object Qfile_newer_than_file_p; | |
| 236 Lisp_Object Qinsert_file_contents; | |
| 237 Lisp_Object Qwrite_region; | |
| 238 Lisp_Object Qverify_visited_file_modtime; | |
| 239 Lisp_Object Qset_visited_file_modtime; | |
| 240 | |
| 241 /* If FILENAME is handled specially on account of its syntax, | |
| 242 return its handler function. Otherwise, return nil. */ | |
| 243 | |
| 244 DEFUN ("find-file-name-handler", Ffind_file_name_handler, 1, 2, 0, /* | |
| 245 Return FILENAME's handler function for OPERATION, if it has one. | |
| 246 Otherwise, return nil. | |
| 247 A file name is handled if one of the regular expressions in | |
| 248 `file-name-handler-alist' matches it. | |
| 249 | |
| 250 If OPERATION equals `inhibit-file-name-operation', then we ignore | |
| 251 any handlers that are members of `inhibit-file-name-handlers', | |
| 252 but we still do run any other handlers. This lets handlers | |
| 253 use the standard functions without calling themselves recursively. | |
| 751 | 254 |
| 255 Otherwise, OPERATION is the name of a funcall'able function. | |
| 428 | 256 */ |
| 257 (filename, operation)) | |
| 258 { | |
| 259 /* This function does not GC */ | |
| 260 /* This function can be called during GC */ | |
| 261 /* This function must not munge the match data. */ | |
| 2367 | 262 Lisp_Object inhibited_handlers; |
| 428 | 263 |
| 264 CHECK_STRING (filename); | |
| 265 | |
| 266 if (EQ (operation, Vinhibit_file_name_operation)) | |
| 267 inhibited_handlers = Vinhibit_file_name_handlers; | |
| 268 else | |
| 269 inhibited_handlers = Qnil; | |
| 270 | |
| 2367 | 271 { |
| 272 EXTERNAL_LIST_LOOP_2 (elt, Vfile_name_handler_alist) | |
| 273 { | |
| 274 if (CONSP (elt)) | |
| 275 { | |
| 276 Lisp_Object string = XCAR (elt); | |
| 277 if (STRINGP (string) | |
| 278 && (fast_lisp_string_match (string, filename) >= 0)) | |
| 279 { | |
| 280 Lisp_Object handler = XCDR (elt); | |
| 281 if (NILP (Fmemq (handler, inhibited_handlers))) | |
| 282 return handler; | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 } | |
| 428 | 287 return Qnil; |
| 288 } | |
| 289 | |
| 290 static Lisp_Object | |
| 291 call2_check_string (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 292 { | |
| 293 /* This function can call lisp */ | |
| 294 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 295 CHECK_STRING (result); | |
| 296 return result; | |
| 297 } | |
| 298 | |
| 299 static Lisp_Object | |
| 300 call2_check_string_or_nil (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 301 { | |
| 302 /* This function can call lisp */ | |
| 303 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 304 if (!NILP (result)) | |
| 305 CHECK_STRING (result); | |
| 306 return result; | |
| 307 } | |
| 308 | |
| 309 static Lisp_Object | |
| 310 call3_check_string (Lisp_Object fn, Lisp_Object arg0, | |
| 311 Lisp_Object arg1, Lisp_Object arg2) | |
| 312 { | |
| 313 /* This function can call lisp */ | |
| 314 Lisp_Object result = call3 (fn, arg0, arg1, arg2); | |
| 315 CHECK_STRING (result); | |
| 316 return result; | |
| 317 } | |
| 318 | |
| 319 | |
| 2526 | 320 |
| 321 Ibyte * | |
| 322 find_end_of_directory_component (const Ibyte *path, Bytecount len) | |
| 323 { | |
| 324 const Ibyte *p = path + len; | |
| 325 | |
| 326 while (p != path && !IS_DIRECTORY_SEP (p[-1]) | |
| 327 #ifdef WIN32_FILENAMES | |
| 328 /* only recognise drive specifier at the beginning */ | |
| 329 && !(p[-1] == ':' | |
| 330 /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
| 331 && ((p == path + 2 && !IS_DIRECTORY_SEP (*path)) | |
| 332 || (p == path + 4 && IS_DIRECTORY_SEP (*path)))) | |
| 333 #endif | |
| 334 ) p--; | |
| 335 | |
| 336 return (Ibyte *) p; | |
| 337 } | |
| 338 | |
| 428 | 339 DEFUN ("file-name-directory", Ffile_name_directory, 1, 1, 0, /* |
| 444 | 340 Return the directory component in file name FILENAME. |
| 341 Return nil if FILENAME does not include a directory. | |
| 428 | 342 Otherwise return a directory spec. |
| 343 Given a Unix syntax file name, returns a string ending in slash. | |
| 344 */ | |
| 444 | 345 (filename)) |
| 428 | 346 { |
| 442 | 347 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 348 /* This function synched with Emacs 21.0.103. */ |
| 867 | 349 Ibyte *beg; |
| 350 Ibyte *p; | |
| 428 | 351 Lisp_Object handler; |
| 352 | |
| 444 | 353 CHECK_STRING (filename); |
| 428 | 354 |
| 355 /* If the file name has special constructs in it, | |
| 356 call the corresponding file handler. */ | |
| 444 | 357 handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
| 428 | 358 if (!NILP (handler)) |
| 444 | 359 return call2_check_string_or_nil (handler, Qfile_name_directory, filename); |
| 428 | 360 |
| 361 #ifdef FILE_SYSTEM_CASE | |
| 444 | 362 filename = FILE_SYSTEM_CASE (filename); |
| 428 | 363 #endif |
| 444 | 364 beg = XSTRING_DATA (filename); |
| 771 | 365 /* XEmacs: no need to alloca-copy here */ |
| 2526 | 366 p = find_end_of_directory_component (beg, XSTRING_LENGTH (filename)); |
| 428 | 367 |
| 368 if (p == beg) | |
| 369 return Qnil; | |
| 442 | 370 #ifdef WIN32_NATIVE |
| 428 | 371 /* Expansion of "c:" to drive and default directory. */ |
| 771 | 372 if (p[-1] == ':') |
| 428 | 373 { |
| 867 | 374 Ibyte *res; |
| 375 Ibyte *wd = mswindows_getdcwd (toupper (*beg) - 'A' + 1); | |
| 771 | 376 |
| 2367 | 377 res = alloca_ibytes ((wd ? qxestrlen (wd) : 0) + 10); /* go overboard */ |
| 1116 | 378 res[0] = '\0'; |
| 771 | 379 if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') |
| 380 { | |
| 381 qxestrncpy (res, beg, 2); | |
| 382 beg += 2; | |
| 1116 | 383 res[2] = '\0'; |
| 771 | 384 } |
| 385 | |
| 386 if (wd) | |
| 428 | 387 { |
| 3648 | 388 int size; |
| 771 | 389 qxestrcat (res, wd); |
| 3648 | 390 size = qxestrlen (res); |
| 391 if (!IS_DIRECTORY_SEP (res[size - 1])) | |
| 392 { | |
| 393 res[size] = DIRECTORY_SEP; | |
| 394 res[size + 1] = '\0'; | |
| 395 } | |
| 428 | 396 beg = res; |
| 771 | 397 p = beg + qxestrlen (beg); |
| 428 | 398 } |
| 3648 | 399 else |
| 400 { | |
| 401 return Qnil; | |
| 402 } | |
| 771 | 403 if (wd) |
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404 xfree (wd); |
| 428 | 405 } |
| 771 | 406 |
| 407 #if 0 /* No! This screws up efs, which calls file-name-directory on URL's | |
| 408 and expects the slashes to be left alone. This is here because of | |
| 409 an analogous call in FSF 21. */ | |
| 410 { | |
| 411 Bytecount len = p - beg; | |
| 867 | 412 Ibyte *newbeg = alloca_ibytes (len + 1); |
| 771 | 413 |
| 414 qxestrncpy (newbeg, beg, len); | |
| 415 newbeg[len] = '\0'; | |
| 416 newbeg = mswindows_canonicalize_filename (newbeg); | |
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417 return build_istring (newbeg); |
| 771 | 418 } |
| 419 #endif | |
| 420 #endif /* not WIN32_NATIVE */ | |
| 428 | 421 return make_string (beg, p - beg); |
| 422 } | |
| 423 | |
| 424 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, 1, 1, 0, /* | |
| 444 | 425 Return file name FILENAME sans its directory. |
| 428 | 426 For example, in a Unix-syntax file name, |
| 427 this is everything after the last slash, | |
| 428 or the entire name if it contains no slash. | |
| 429 */ | |
| 444 | 430 (filename)) |
| 428 | 431 { |
| 442 | 432 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 433 /* This function synched with Emacs 21.0.103. */ |
| 867 | 434 Ibyte *beg, *p, *end; |
| 428 | 435 Lisp_Object handler; |
| 436 | |
| 444 | 437 CHECK_STRING (filename); |
| 428 | 438 |
| 439 /* If the file name has special constructs in it, | |
| 440 call the corresponding file handler. */ | |
| 444 | 441 handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
| 428 | 442 if (!NILP (handler)) |
| 444 | 443 return call2_check_string (handler, Qfile_name_nondirectory, filename); |
| 444 | |
| 445 beg = XSTRING_DATA (filename); | |
| 446 end = p = beg + XSTRING_LENGTH (filename); | |
| 428 | 447 |
| 771 | 448 while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
| 657 | 449 #ifdef WIN32_FILENAMES |
| 771 | 450 /* only recognise drive specifier at beginning */ |
| 451 && !(p[-1] == ':' | |
| 452 /* handle the "/:d:foo" case correctly */ | |
| 453 && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
| 428 | 454 #endif |
| 771 | 455 ) |
| 456 p--; | |
| 428 | 457 |
| 458 return make_string (p, end - p); | |
| 459 } | |
| 460 | |
| 461 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, 1, 1, 0, /* | |
| 462 Return a directly usable directory name somehow associated with FILENAME. | |
| 463 A `directly usable' directory name is one that may be used without the | |
| 464 intervention of any file handler. | |
| 465 If FILENAME is a directly usable file itself, return | |
| 466 \(file-name-directory FILENAME). | |
| 467 The `call-process' and `start-process' functions use this function to | |
| 468 get a current directory to run processes in. | |
| 469 */ | |
| 444 | 470 (filename)) |
| 428 | 471 { |
| 442 | 472 /* This function can GC. GC checked 2000-07-28 ben */ |
| 428 | 473 Lisp_Object handler; |
| 474 | |
| 475 /* If the file name has special constructs in it, | |
| 476 call the corresponding file handler. */ | |
| 477 handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); | |
| 478 if (!NILP (handler)) | |
| 479 return call2 (handler, Qunhandled_file_name_directory, | |
| 480 filename); | |
| 481 | |
| 482 return Ffile_name_directory (filename); | |
| 483 } | |
| 484 | |
| 485 | |
| 867 | 486 static Ibyte * |
| 487 file_name_as_directory (Ibyte *out, Ibyte *in) | |
| 428 | 488 { |
| 442 | 489 /* This function cannot GC */ |
| 771 | 490 int size = qxestrlen (in); |
| 428 | 491 |
| 492 if (size == 0) | |
| 493 { | |
| 494 out[0] = '.'; | |
| 495 out[1] = DIRECTORY_SEP; | |
| 496 out[2] = '\0'; | |
| 497 } | |
| 498 else | |
| 499 { | |
| 771 | 500 qxestrcpy (out, in); |
| 428 | 501 /* Append a slash if necessary */ |
| 502 if (!IS_ANY_SEP (out[size-1])) | |
| 503 { | |
| 504 out[size] = DIRECTORY_SEP; | |
| 505 out[size + 1] = '\0'; | |
| 506 } | |
| 507 } | |
| 508 return out; | |
| 509 } | |
| 510 | |
| 511 DEFUN ("file-name-as-directory", Ffile_name_as_directory, 1, 1, 0, /* | |
| 512 Return a string representing file FILENAME interpreted as a directory. | |
| 513 This operation exists because a directory is also a file, but its name as | |
| 514 a directory is different from its name as a file. | |
| 515 The result can be used as the value of `default-directory' | |
| 516 or passed as second argument to `expand-file-name'. | |
| 517 For a Unix-syntax file name, just appends a slash, | |
| 518 except for (file-name-as-directory \"\") => \"./\". | |
| 519 */ | |
| 444 | 520 (filename)) |
| 428 | 521 { |
| 442 | 522 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 523 Ibyte *buf; |
| 428 | 524 Lisp_Object handler; |
| 525 | |
| 444 | 526 CHECK_STRING (filename); |
| 428 | 527 |
| 528 /* If the file name has special constructs in it, | |
| 529 call the corresponding file handler. */ | |
| 444 | 530 handler = Ffind_file_name_handler (filename, Qfile_name_as_directory); |
| 428 | 531 if (!NILP (handler)) |
| 444 | 532 return call2_check_string (handler, Qfile_name_as_directory, filename); |
| 533 | |
| 867 | 534 buf = alloca_ibytes (XSTRING_LENGTH (filename) + 10); |
| 2526 | 535 file_name_as_directory (buf, XSTRING_DATA (filename)); |
| 536 if (qxestrcmp (buf, XSTRING_DATA (filename))) | |
|
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4952
diff
changeset
|
537 return build_istring (buf); |
| 2526 | 538 else |
| 539 return filename; | |
| 428 | 540 } |
| 541 | |
| 542 /* | |
| 543 * Convert from directory name to filename. | |
| 544 * On UNIX, it's simple: just make sure there isn't a terminating / | |
| 545 * | |
| 546 * Value is nonzero if the string output is different from the input. | |
| 547 */ | |
| 548 | |
| 549 static int | |
| 867 | 550 directory_file_name (const Ibyte *src, Ibyte *dst) |
| 428 | 551 { |
| 442 | 552 /* This function cannot GC */ |
| 771 | 553 long slen = qxestrlen (src); |
| 428 | 554 /* Process as Unix format: just remove any final slash. |
| 555 But leave "/" unchanged; do not change it to "". */ | |
| 771 | 556 qxestrcpy (dst, src); |
| 428 | 557 if (slen > 1 |
| 558 && IS_DIRECTORY_SEP (dst[slen - 1]) | |
| 657 | 559 #ifdef WIN32_FILENAMES |
| 428 | 560 && !IS_ANY_SEP (dst[slen - 2]) |
| 657 | 561 #endif /* WIN32_FILENAMES */ |
| 428 | 562 ) |
| 563 dst[slen - 1] = 0; | |
| 564 return 1; | |
| 565 } | |
| 566 | |
| 567 DEFUN ("directory-file-name", Fdirectory_file_name, 1, 1, 0, /* | |
| 444 | 568 Return the file name of the directory named DIRECTORY. |
| 569 This is the name of the file that holds the data for the directory. | |
| 428 | 570 This operation exists because a directory is also a file, but its name as |
| 571 a directory is different from its name as a file. | |
| 572 In Unix-syntax, this function just removes the final slash. | |
| 573 */ | |
| 574 (directory)) | |
| 575 { | |
| 442 | 576 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 577 Ibyte *buf; |
| 428 | 578 Lisp_Object handler; |
| 579 | |
| 580 CHECK_STRING (directory); | |
| 581 | |
| 582 #if 0 /* #### WTF? */ | |
| 583 if (NILP (directory)) | |
| 584 return Qnil; | |
| 585 #endif | |
| 586 | |
| 587 /* If the file name has special constructs in it, | |
| 588 call the corresponding file handler. */ | |
| 589 handler = Ffind_file_name_handler (directory, Qdirectory_file_name); | |
| 590 if (!NILP (handler)) | |
| 591 return call2_check_string (handler, Qdirectory_file_name, directory); | |
| 2367 | 592 buf = alloca_ibytes (XSTRING_LENGTH (directory) + 20); |
| 771 | 593 directory_file_name (XSTRING_DATA (directory), buf); |
|
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diff
changeset
|
594 return build_istring (buf); |
| 428 | 595 } |
| 596 | |
| 597 /* Fmake_temp_name used to be a simple wrapper around mktemp(), but it | |
| 598 proved too broken for our purposes (it supported only 26 or 62 | |
| 599 unique names under some implementations). For example, this | |
| 600 arbitrary limit broke generation of Gnus Incoming* files. | |
| 601 | |
| 602 This implementation is better than what one usually finds in libc. | |
| 603 --hniksic */ | |
| 604 | |
| 442 | 605 static unsigned int temp_name_rand; |
| 606 | |
| 428 | 607 DEFUN ("make-temp-name", Fmake_temp_name, 1, 1, 0, /* |
| 442 | 608 Generate a temporary file name starting with PREFIX. |
| 428 | 609 The Emacs process number forms part of the result, so there is no |
| 610 danger of generating a name being used by another process. | |
| 611 | |
| 612 In addition, this function makes an attempt to choose a name that | |
| 613 does not specify an existing file. To make this work, PREFIX should | |
| 4266 | 614 be an absolute file name. |
| 615 | |
| 616 This function is analagous to mktemp(3) under POSIX, and as with it, there | |
| 617 exists a race condition between the test for the existence of the new file | |
|
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|
618 and its creation. See `make-temp-file' for a function which avoids this |
| 4266 | 619 race condition by specifying the appropriate flags to `write-region'. |
| 428 | 620 */ |
| 621 (prefix)) | |
| 622 { | |
|
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44d7bde26046
fix compile errors, fix revert-buffer bug on binary/Latin 1 files, Mule-ize some files
Ben Wing <ben@xemacs.org>
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4982
diff
changeset
|
623 static const Ascbyte tbl[64] = |
| 442 | 624 { |
| 428 | 625 'A','B','C','D','E','F','G','H', |
| 626 'I','J','K','L','M','N','O','P', | |
| 627 'Q','R','S','T','U','V','W','X', | |
| 628 'Y','Z','a','b','c','d','e','f', | |
| 629 'g','h','i','j','k','l','m','n', | |
| 630 'o','p','q','r','s','t','u','v', | |
| 631 'w','x','y','z','0','1','2','3', | |
| 442 | 632 '4','5','6','7','8','9','-','_' |
| 633 }; | |
| 428 | 634 |
| 635 Bytecount len; | |
| 867 | 636 Ibyte *p, *data; |
| 844 | 637 Lisp_Object handler; |
| 428 | 638 |
| 639 CHECK_STRING (prefix); | |
| 844 | 640 handler = Ffind_file_name_handler (prefix, Qmake_temp_name); |
| 641 if (!NILP (handler)) | |
| 642 return call2_check_string (handler, Qmake_temp_name, prefix); | |
| 428 | 643 |
| 644 /* I was tempted to apply Fexpand_file_name on PREFIX here, but it's | |
| 645 a bad idea because: | |
| 646 | |
| 647 1) It might change the prefix, so the resulting string might not | |
| 648 begin with PREFIX. This violates the principle of least | |
| 649 surprise. | |
| 650 | |
| 651 2) It breaks under many unforeseeable circumstances, such as with | |
| 652 the code that uses (make-temp-name "") instead of | |
| 653 (make-temp-name "./"). | |
| 654 | |
| 844 | 655 [[ 3) It might yield unexpected (to stat(2)) results in the presence |
| 656 of EFS and file name handlers.]] Now that we check for a handler, | |
| 657 that's less of a concern. --ben */ | |
| 428 | 658 |
| 659 len = XSTRING_LENGTH (prefix); | |
| 867 | 660 data = alloca_ibytes (len + 7); |
| 428 | 661 memcpy (data, XSTRING_DATA (prefix), len); |
| 662 p = data + len; | |
| 771 | 663 p[6] = '\0'; |
| 428 | 664 |
| 665 /* VAL is created by adding 6 characters to PREFIX. The first three | |
| 666 are the PID of this process, in base 64, and the second three are | |
| 442 | 667 a pseudo-random number seeded from process startup time. This |
| 668 ensures 262144 unique file names per PID per PREFIX per machine. */ | |
| 669 | |
| 670 { | |
| 771 | 671 unsigned int pid = (unsigned int) qxe_getpid (); |
| 442 | 672 *p++ = tbl[(pid >> 0) & 63]; |
| 673 *p++ = tbl[(pid >> 6) & 63]; | |
| 674 *p++ = tbl[(pid >> 12) & 63]; | |
| 675 } | |
| 428 | 676 |
| 677 /* Here we try to minimize useless stat'ing when this function is | |
| 678 invoked many times successively with the same PREFIX. We achieve | |
| 442 | 679 this by using a very pseudo-random number generator to generate |
| 680 file names unique to this process, with a very long cycle. */ | |
| 428 | 681 |
| 682 while (1) | |
| 683 { | |
| 684 struct stat ignored; | |
| 442 | 685 |
| 686 p[0] = tbl[(temp_name_rand >> 0) & 63]; | |
| 687 p[1] = tbl[(temp_name_rand >> 6) & 63]; | |
| 688 p[2] = tbl[(temp_name_rand >> 12) & 63]; | |
| 428 | 689 |
| 690 /* Poor man's congruential RN generator. Replace with ++count | |
| 691 for debugging. */ | |
| 442 | 692 temp_name_rand += 25229; |
| 693 temp_name_rand %= 225307; | |
| 428 | 694 |
| 695 QUIT; | |
| 696 | |
| 771 | 697 if (qxe_stat (data, &ignored) < 0) |
| 428 | 698 { |
| 699 /* We want to return only if errno is ENOENT. */ | |
| 700 if (errno == ENOENT) | |
| 771 | 701 return make_string (data, len + 6); |
| 428 | 702 |
| 703 /* The error here is dubious, but there is little else we | |
| 704 can do. The alternatives are to return nil, which is | |
| 705 as bad as (and in many cases worse than) throwing the | |
| 706 error, or to ignore the error, which will likely result | |
| 707 in inflooping. */ | |
| 708 report_file_error ("Cannot create temporary name for prefix", | |
| 563 | 709 prefix); |
| 428 | 710 return Qnil; /* not reached */ |
| 711 } | |
| 712 } | |
| 713 } | |
| 714 | |
| 715 | |
| 771 | 716 |
| 428 | 717 DEFUN ("expand-file-name", Fexpand_file_name, 1, 2, 0, /* |
| 718 Convert filename NAME to absolute, and canonicalize it. | |
| 719 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
| 720 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing, | |
| 444 | 721 the current buffer's value of `default-directory' is used. |
| 428 | 722 File name components that are `.' are removed, and |
| 723 so are file name components followed by `..', along with the `..' itself; | |
| 724 note that these simplifications are done without checking the resulting | |
| 725 file names in the file system. | |
| 726 An initial `~/' expands to your home directory. | |
| 727 An initial `~USER/' expands to USER's home directory. | |
| 728 See also the function `substitute-in-file-name'. | |
| 729 */ | |
| 730 (name, default_directory)) | |
| 731 { | |
| 771 | 732 /* This function can GC. GC-checked 2000-11-18. |
| 733 This function synched with Emacs 21.0.103. */ | |
| 867 | 734 Ibyte *nm; |
| 735 | |
| 736 Ibyte *newdir, *p, *o; | |
| 428 | 737 int tlen; |
| 867 | 738 Ibyte *target; |
| 657 | 739 #ifdef WIN32_FILENAMES |
| 428 | 740 int drive = 0; |
| 741 int collapse_newdir = 1; | |
| 771 | 742 /* XEmacs note: This concerns the special '/:' syntax for preventing |
| 743 wildcards and such. We don't support this currently but I'm | |
| 744 keeping the code here in case we do. */ | |
| 745 int is_escaped = 0; | |
| 657 | 746 #endif |
| 747 #ifndef WIN32_NATIVE | |
| 428 | 748 struct passwd *pw; |
| 771 | 749 #endif |
| 428 | 750 int length; |
| 446 | 751 Lisp_Object handler = Qnil; |
| 752 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2526 | 753 PROFILE_DECLARE (); |
| 754 | |
| 755 PROFILE_RECORD_ENTERING_SECTION (QSin_expand_file_name); | |
| 442 | 756 |
| 757 /* both of these get set below */ | |
| 446 | 758 GCPRO3 (name, default_directory, handler); |
| 428 | 759 |
| 760 CHECK_STRING (name); | |
| 761 | |
| 762 /* If the file name has special constructs in it, | |
| 763 call the corresponding file handler. */ | |
| 764 handler = Ffind_file_name_handler (name, Qexpand_file_name); | |
| 765 if (!NILP (handler)) | |
| 2526 | 766 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 767 call3_check_string | |
| 768 (handler, Qexpand_file_name, | |
| 769 name, default_directory)); | |
| 428 | 770 |
| 771 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ | |
| 772 if (NILP (default_directory)) | |
| 773 default_directory = current_buffer->directory; | |
| 774 if (! STRINGP (default_directory)) | |
|
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Mule-izing, various fixes related to char * arguments
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parents:
4867
diff
changeset
|
775 default_directory = build_ascstring (DEFAULT_DIRECTORY_FALLBACK); |
| 428 | 776 |
| 777 if (!NILP (default_directory)) | |
| 778 { | |
| 779 handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); | |
| 780 if (!NILP (handler)) | |
| 2526 | 781 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
|
4826
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use call3_check_string on all invocations of external handlers in expand-file-name
Ben Wing <ben@xemacs.org>
parents:
4824
diff
changeset
|
782 call3_check_string |
|
780bb5441c14
use call3_check_string on all invocations of external handlers in expand-file-name
Ben Wing <ben@xemacs.org>
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4824
diff
changeset
|
783 (handler, Qexpand_file_name, |
|
780bb5441c14
use call3_check_string on all invocations of external handlers in expand-file-name
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diff
changeset
|
784 name, default_directory)); |
| 428 | 785 } |
| 786 | |
| 787 o = XSTRING_DATA (default_directory); | |
| 788 | |
| 789 /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
| 790 It would be better to do this down below where we actually use | |
| 791 default_directory. Unfortunately, calling Fexpand_file_name recursively | |
| 792 could invoke GC, and the strings might be relocated. This would | |
| 793 be annoying because we have pointers into strings lying around | |
| 794 that would need adjusting, and people would add new pointers to | |
| 795 the code and forget to adjust them, resulting in intermittent bugs. | |
| 796 Putting this call here avoids all that crud. | |
| 797 | |
| 798 The EQ test avoids infinite recursion. */ | |
| 799 if (! NILP (default_directory) && !EQ (default_directory, name) | |
| 800 /* Save time in some common cases - as long as default_directory | |
| 801 is not relative, it can be canonicalized with name below (if it | |
| 802 is needed at all) without requiring it to be expanded now. */ | |
| 657 | 803 #ifdef WIN32_FILENAMES |
| 442 | 804 /* Detect Windows file names with drive specifiers. */ |
| 428 | 805 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2]))) |
| 806 /* Detect Windows file names in UNC format. */ | |
| 807 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
| 657 | 808 #endif /* not WIN32_FILENAMES */ |
| 809 #ifndef WIN32_NATIVE | |
| 428 | 810 /* Detect Unix absolute file names (/... alone is not absolute on |
| 442 | 811 Windows). */ |
| 428 | 812 && ! (IS_DIRECTORY_SEP (o[0])) |
| 442 | 813 #endif /* not WIN32_NATIVE */ |
| 428 | 814 ) |
| 442 | 815 |
| 816 default_directory = Fexpand_file_name (default_directory, Qnil); | |
| 428 | 817 |
| 818 #ifdef FILE_SYSTEM_CASE | |
| 819 name = FILE_SYSTEM_CASE (name); | |
| 820 #endif | |
| 821 | |
| 822 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing | |
| 823 into name should be safe during all of this, though. */ | |
| 824 nm = XSTRING_DATA (name); | |
| 825 | |
| 657 | 826 #ifdef WIN32_FILENAMES |
| 428 | 827 /* We will force directory separators to be either all \ or /, so make |
| 828 a local copy to modify, even if there ends up being no change. */ | |
| 867 | 829 nm = qxestrcpy (alloca_ibytes (qxestrlen (nm) + 1), nm); |
| 771 | 830 |
| 831 /* Note if special escape prefix is present, but remove for now. */ | |
| 832 if (nm[0] == '/' && nm[1] == ':') | |
| 833 { | |
| 834 is_escaped = 1; | |
| 835 nm += 2; | |
| 836 } | |
| 428 | 837 |
| 838 /* Find and remove drive specifier if present; this makes nm absolute | |
| 839 even if the rest of the name appears to be relative. */ | |
| 840 { | |
| 867 | 841 Ibyte *colon = qxestrrchr (nm, ':'); |
| 428 | 842 |
| 843 if (colon) | |
| 657 | 844 { |
| 428 | 845 /* Only recognize colon as part of drive specifier if there is a |
| 846 single alphabetic character preceding the colon (and if the | |
| 847 character before the drive letter, if present, is a directory | |
| 848 separator); this is to support the remote system syntax used by | |
| 849 ange-ftp, and the "po:username" syntax for POP mailboxes. */ | |
| 850 look_again: | |
| 851 if (nm == colon) | |
| 852 nm++; | |
| 853 else if (IS_DRIVE (colon[-1]) | |
| 854 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2]))) | |
| 855 { | |
| 856 drive = colon[-1]; | |
| 857 nm = colon + 1; | |
| 858 } | |
| 859 else | |
| 860 { | |
| 861 while (--colon >= nm) | |
| 862 if (colon[0] == ':') | |
| 863 goto look_again; | |
| 864 } | |
| 657 | 865 } |
| 428 | 866 } |
| 867 | |
| 868 /* If we see "c://somedir", we want to strip the first slash after the | |
| 869 colon when stripping the drive letter. Otherwise, this expands to | |
| 870 "//somedir". */ | |
| 871 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 872 nm++; | |
| 657 | 873 #endif /* WIN32_FILENAMES */ |
| 428 | 874 |
| 771 | 875 #ifdef WIN32_FILENAMES |
| 876 /* Discard any previous drive specifier if nm is now in UNC format. */ | |
| 877 if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 878 { | |
| 879 drive = 0; | |
| 880 } | |
| 881 #endif | |
| 882 | |
| 428 | 883 /* If nm is absolute, look for /./ or /../ sequences; if none are |
| 884 found, we can probably return right away. We will avoid allocating | |
| 885 a new string if name is already fully expanded. */ | |
| 886 if ( | |
| 887 IS_DIRECTORY_SEP (nm[0]) | |
| 442 | 888 #ifdef WIN32_NATIVE |
| 771 | 889 && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
| 428 | 890 #endif |
| 891 ) | |
| 892 { | |
| 893 /* If it turns out that the filename we want to return is just a | |
| 894 suffix of FILENAME, we don't need to go through and edit | |
| 895 things; we just need to construct a new string using data | |
| 896 starting at the middle of FILENAME. If we set lose to a | |
| 897 non-zero value, that means we've discovered that we can't do | |
| 898 that cool trick. */ | |
| 899 int lose = 0; | |
| 900 | |
| 901 p = nm; | |
| 902 while (*p) | |
| 903 { | |
| 904 /* Since we know the name is absolute, we can assume that each | |
| 905 element starts with a "/". */ | |
| 906 | |
| 907 /* "." and ".." are hairy. */ | |
| 908 if (IS_DIRECTORY_SEP (p[0]) | |
| 909 && p[1] == '.' | |
| 910 && (IS_DIRECTORY_SEP (p[2]) | |
| 911 || p[2] == 0 | |
| 912 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) | |
| 913 || p[3] == 0)))) | |
| 914 lose = 1; | |
| 771 | 915 /* We want to replace multiple `/' in a row with a single |
| 916 slash. */ | |
| 917 else if (p > nm | |
| 918 && IS_DIRECTORY_SEP (p[0]) | |
| 919 && IS_DIRECTORY_SEP (p[1])) | |
| 920 lose = 1; | |
| 428 | 921 p++; |
| 922 } | |
| 923 if (!lose) | |
| 924 { | |
| 657 | 925 #ifdef WIN32_FILENAMES |
| 926 if (drive || IS_DIRECTORY_SEP (nm[1])) | |
| 428 | 927 { |
| 867 | 928 Ibyte *newnm; |
| 771 | 929 |
| 657 | 930 if (IS_DIRECTORY_SEP (nm[1])) |
| 931 { | |
| 771 | 932 newnm = mswindows_canonicalize_filename (nm); |
| 933 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
|
4953
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parents:
4952
diff
changeset
|
934 name = build_istring (newnm); |
| 657 | 935 } |
| 771 | 936 else |
| 657 | 937 { |
| 771 | 938 /* drive must be set, so this is okay */ |
| 939 newnm = mswindows_canonicalize_filename (nm - 2); | |
| 940 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 941 { | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
942 name = build_istring (newnm); |
| 771 | 943 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive); |
| 944 XSTRING_DATA (name)[1] = ':'; | |
| 945 } | |
| 657 | 946 } |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
947 xfree (newnm); |
| 2526 | 948 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 428 | 949 } |
| 771 | 950 #endif /* WIN32_FILENAMES */ |
| 657 | 951 #ifndef WIN32_NATIVE |
| 428 | 952 if (nm == XSTRING_DATA (name)) |
| 2526 | 953 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 954 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, | |
|
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955 build_istring (nm)); |
| 442 | 956 #endif /* not WIN32_NATIVE */ |
| 428 | 957 } |
| 958 } | |
| 959 | |
| 960 /* At this point, nm might or might not be an absolute file name. We | |
| 961 need to expand ~ or ~user if present, otherwise prefix nm with | |
| 962 default_directory if nm is not absolute, and finally collapse /./ | |
| 963 and /foo/../ sequences. | |
| 964 | |
| 965 We set newdir to be the appropriate prefix if one is needed: | |
| 966 - the relevant user directory if nm starts with ~ or ~user | |
| 967 - the specified drive's working dir (DOS/NT only) if nm does not | |
| 968 start with / | |
| 969 - the value of default_directory. | |
| 970 | |
| 971 Note that these prefixes are not guaranteed to be absolute (except | |
| 972 for the working dir of a drive). Therefore, to ensure we always | |
| 973 return an absolute name, if the final prefix is not absolute we | |
| 974 append it to the current working directory. */ | |
| 975 | |
| 976 newdir = 0; | |
| 977 | |
| 978 if (nm[0] == '~') /* prefix ~ */ | |
| 979 { | |
| 980 if (IS_DIRECTORY_SEP (nm[1]) | |
| 981 || nm[1] == 0) /* ~ by itself */ | |
| 982 { | |
| 867 | 983 Ibyte *homedir = get_home_directory (); |
| 771 | 984 |
| 985 if (!homedir) | |
| 867 | 986 newdir = (Ibyte *) ""; |
| 428 | 987 else |
| 771 | 988 newdir = homedir; |
| 428 | 989 |
| 990 nm++; | |
| 657 | 991 #ifdef WIN32_FILENAMES |
| 428 | 992 collapse_newdir = 0; |
| 993 #endif | |
| 994 } | |
| 995 else /* ~user/filename */ | |
| 996 { | |
| 997 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++) | |
| 998 DO_NOTHING; | |
| 2367 | 999 o = alloca_ibytes (p - nm + 1); |
| 771 | 1000 memcpy (o, nm, p - nm); |
| 428 | 1001 o [p - nm] = 0; |
| 1002 | |
| 558 | 1003 /* #### While NT is single-user (for the moment) you still |
| 1004 can have multiple user profiles users defined, each with | |
| 1005 its HOME. So maybe possibly we should think about handling | |
| 1006 ~user. --ben */ | |
| 1007 #ifndef WIN32_NATIVE | |
| 442 | 1008 #ifdef CYGWIN |
| 771 | 1009 { |
| 867 | 1010 Ibyte *user; |
| 771 | 1011 |
| 1012 if ((user = user_login_name (NULL)) != NULL) | |
| 1013 { | |
| 1014 /* Does the user login name match the ~name? */ | |
| 1015 if (qxestrcmp (user, o + 1) == 0) | |
| 1016 { | |
| 1017 newdir = get_home_directory (); | |
| 1018 nm = p; | |
| 1019 } | |
| 1020 } | |
| 1021 } | |
| 1022 if (!newdir) | |
| 428 | 1023 { |
| 442 | 1024 #endif /* CYGWIN */ |
| 428 | 1025 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM |
| 1026 occurring in it. (It can call select()). */ | |
| 1027 slow_down_interrupts (); | |
| 771 | 1028 pw = (struct passwd *) qxe_getpwnam (o + 1); |
| 428 | 1029 speed_up_interrupts (); |
| 1030 if (pw) | |
| 1031 { | |
| 867 | 1032 newdir = (Ibyte *) pw->pw_dir; |
| 428 | 1033 nm = p; |
| 771 | 1034 /* FSF: if WIN32_NATIVE, collapse_newdir = 0; |
| 1035 not possible here. */ | |
| 428 | 1036 } |
| 442 | 1037 #ifdef CYGWIN |
| 428 | 1038 } |
| 1039 #endif | |
| 442 | 1040 #endif /* not WIN32_NATIVE */ |
| 428 | 1041 |
| 1042 /* If we don't find a user of that name, leave the name | |
| 1043 unchanged; don't move nm forward to p. */ | |
| 1044 } | |
| 1045 } | |
| 1046 | |
| 657 | 1047 #ifdef WIN32_FILENAMES |
| 428 | 1048 /* On DOS and Windows, nm is absolute if a drive name was specified; |
| 1049 use the drive's current directory as the prefix if needed. */ | |
| 1050 if (!newdir && drive) | |
| 1051 { | |
| 657 | 1052 #ifdef WIN32_NATIVE |
| 428 | 1053 /* Get default directory if needed to make nm absolute. */ |
| 1054 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1055 { | |
| 867 | 1056 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1057 if (newcwd) |
| 1058 { | |
| 867 | 1059 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
|
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1060 xfree (newcwd); |
| 771 | 1061 } |
| 1062 else | |
| 428 | 1063 newdir = NULL; |
| 1064 } | |
| 657 | 1065 #endif /* WIN32_NATIVE */ |
| 428 | 1066 if (!newdir) |
| 1067 { | |
| 1068 /* Either nm starts with /, or drive isn't mounted. */ | |
| 2367 | 1069 newdir = alloca_ibytes (4); |
| 428 | 1070 newdir[0] = DRIVE_LETTER (drive); |
| 1071 newdir[1] = ':'; | |
| 1072 newdir[2] = '/'; | |
| 1073 newdir[3] = 0; | |
| 1074 } | |
| 1075 } | |
| 657 | 1076 #endif /* WIN32_FILENAMES */ |
| 428 | 1077 |
| 1078 /* Finally, if no prefix has been specified and nm is not absolute, | |
| 1079 then it must be expanded relative to default_directory. */ | |
| 1080 | |
| 1081 if (1 | |
| 442 | 1082 #ifndef WIN32_NATIVE |
| 428 | 1083 /* /... alone is not absolute on DOS and Windows. */ |
| 1084 && !IS_DIRECTORY_SEP (nm[0]) | |
| 657 | 1085 #endif |
| 1086 #ifdef WIN32_FILENAMES | |
| 428 | 1087 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 1088 #endif | |
| 1089 && !newdir) | |
| 1090 { | |
| 1091 newdir = XSTRING_DATA (default_directory); | |
| 771 | 1092 #ifdef WIN32_FILENAMES |
| 1093 /* Note if special escape prefix is present, but remove for now. */ | |
| 1094 if (newdir[0] == '/' && newdir[1] == ':') | |
| 1095 { | |
| 1096 is_escaped = 1; | |
| 1097 newdir += 2; | |
| 1098 } | |
| 1099 #endif | |
| 428 | 1100 } |
| 1101 | |
| 657 | 1102 #ifdef WIN32_FILENAMES |
| 428 | 1103 if (newdir) |
| 1104 { | |
| 1105 /* First ensure newdir is an absolute name. */ | |
| 1106 if ( | |
| 442 | 1107 /* Detect Windows file names with drive specifiers. */ |
| 428 | 1108 ! (IS_DRIVE (newdir[0]) |
| 1109 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
| 1110 /* Detect Windows file names in UNC format. */ | |
| 1111 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 771 | 1112 /* XEmacs: added these two lines: Detect drive spec by itself */ |
| 428 | 1113 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0) |
| 657 | 1114 /* Detect unix format. */ |
| 1115 #ifndef WIN32_NATIVE | |
| 1116 && ! (IS_DIRECTORY_SEP (newdir[0])) | |
| 1117 #endif | |
| 428 | 1118 ) |
| 1119 { | |
| 1120 /* Effectively, let newdir be (expand-file-name newdir cwd). | |
| 1121 Because of the admonition against calling expand-file-name | |
| 1122 when we have pointers into lisp strings, we accomplish this | |
| 1123 indirectly by prepending newdir to nm if necessary, and using | |
| 1124 cwd (or the wd of newdir's drive) as the new newdir. */ | |
| 1125 | |
| 1126 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1127 { | |
| 1128 drive = newdir[0]; | |
| 1129 newdir += 2; | |
| 1130 } | |
| 1131 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1132 { | |
| 2367 | 1133 Ibyte *tmp = alloca_ibytes (qxestrlen (newdir) + |
| 1134 qxestrlen (nm) + 2); | |
| 771 | 1135 file_name_as_directory (tmp, newdir); |
| 1136 qxestrcat (tmp, nm); | |
| 428 | 1137 nm = tmp; |
| 1138 } | |
| 1139 if (drive) | |
| 1140 { | |
| 657 | 1141 #ifdef WIN32_NATIVE |
| 867 | 1142 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1143 if (newcwd) |
| 1144 { | |
| 867 | 1145 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
|
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|
1146 xfree (newcwd); |
| 771 | 1147 } |
| 1148 else | |
| 657 | 1149 #endif |
| 867 | 1150 IBYTE_STRING_TO_ALLOCA ((Ibyte *) "/", newdir); |
| 428 | 1151 } |
| 1152 else | |
| 867 | 1153 IBYTE_STRING_TO_ALLOCA (get_initial_directory (0, 0), newdir); |
| 428 | 1154 } |
| 1155 | |
| 1156 /* Strip off drive name from prefix, if present. */ | |
| 1157 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1158 { | |
| 1159 drive = newdir[0]; | |
| 1160 newdir += 2; | |
| 1161 } | |
| 1162 | |
| 1163 /* Keep only a prefix from newdir if nm starts with slash | |
| 771 | 1164 (//server/share for UNC, nothing otherwise). */ |
| 657 | 1165 if (IS_DIRECTORY_SEP (nm[0]) |
| 1166 #ifndef WIN32_NATIVE | |
| 1167 && IS_DIRECTORY_SEP (nm[1]) | |
| 1168 #endif | |
| 1169 && collapse_newdir) | |
| 428 | 1170 { |
| 1171 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 1172 { | |
| 2367 | 1173 /* !!#### Use ei API */ |
| 1174 newdir = qxestrcpy (alloca_ibytes (qxestrlen (newdir) + 1), | |
| 1175 newdir); | |
| 428 | 1176 p = newdir + 2; |
| 1177 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1178 p++; | |
| 1179 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1180 *p = 0; | |
| 1181 } | |
| 1182 else | |
| 867 | 1183 newdir = (Ibyte *) ""; |
| 428 | 1184 } |
| 1185 } | |
| 657 | 1186 #endif /* WIN32_FILENAMES */ |
| 428 | 1187 |
| 1188 if (newdir) | |
| 1189 { | |
| 1190 /* Get rid of any slash at the end of newdir, unless newdir is | |
| 771 | 1191 just / or // (an incomplete UNC name). */ |
| 1192 length = qxestrlen (newdir); | |
| 428 | 1193 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
| 657 | 1194 #ifdef WIN32_FILENAMES |
| 428 | 1195 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) |
| 1196 #endif | |
| 1197 ) | |
| 1198 { | |
| 2367 | 1199 Ibyte *temp = alloca_ibytes (length); |
| 428 | 1200 memcpy (temp, newdir, length - 1); |
| 1201 temp[length - 1] = 0; | |
| 1202 newdir = temp; | |
| 1203 } | |
| 1204 tlen = length + 1; | |
| 1205 } | |
| 1206 else | |
| 1207 tlen = 0; | |
| 1208 | |
| 1209 /* Now concatenate the directory and name to new space in the stack frame */ | |
| 771 | 1210 tlen += qxestrlen (nm) + 1; |
| 657 | 1211 #ifdef WIN32_FILENAMES |
| 771 | 1212 /* Reserve space for drive specifier and escape prefix, since either |
| 1213 or both may need to be inserted. (The Microsoft x86 compiler | |
| 428 | 1214 produces incorrect code if the following two lines are combined.) */ |
| 2367 | 1215 target = alloca_ibytes (tlen + 4); |
| 771 | 1216 target += 4; |
| 657 | 1217 #else /* not WIN32_FILENAMES */ |
| 2367 | 1218 target = alloca_ibytes (tlen); |
| 657 | 1219 #endif /* not WIN32_FILENAMES */ |
| 428 | 1220 *target = 0; |
| 1221 | |
| 1222 if (newdir) | |
| 1223 { | |
| 1224 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) | |
| 771 | 1225 { |
| 1226 #ifdef WIN32_FILENAMES | |
| 1227 /* If newdir is effectively "C:/", then the drive letter will have | |
| 1228 been stripped and newdir will be "/". Concatenating with an | |
| 1229 absolute directory in nm produces "//", which will then be | |
| 1230 incorrectly treated as a network share. Ignore newdir in | |
| 1231 this case (keeping the drive letter). */ | |
| 1232 if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) | |
| 1233 && newdir[1] == '\0')) | |
| 1234 #endif | |
| 1235 qxestrcpy (target, newdir); | |
| 1236 } | |
| 428 | 1237 else |
| 771 | 1238 file_name_as_directory (target, newdir); |
| 428 | 1239 } |
| 1240 | |
| 771 | 1241 qxestrcat (target, nm); |
| 428 | 1242 |
| 1243 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ | |
| 1244 | |
| 771 | 1245 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
| 1246 appear. */ | |
| 428 | 1247 |
| 1248 p = target; | |
| 1249 o = target; | |
| 1250 | |
| 1251 while (*p) | |
| 1252 { | |
| 1253 if (!IS_DIRECTORY_SEP (*p)) | |
| 1254 { | |
| 1255 *o++ = *p++; | |
| 1256 } | |
| 1257 else if (IS_DIRECTORY_SEP (p[0]) | |
| 1258 && p[1] == '.' | |
| 1259 && (IS_DIRECTORY_SEP (p[2]) | |
| 1260 || p[2] == 0)) | |
| 1261 { | |
| 1262 /* If "/." is the entire filename, keep the "/". Otherwise, | |
| 1263 just delete the whole "/.". */ | |
| 1264 if (o == target && p[2] == '\0') | |
| 1265 *o++ = *p; | |
| 1266 p += 2; | |
| 1267 } | |
| 1268 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.' | |
| 1269 /* `/../' is the "superroot" on certain file systems. */ | |
| 1270 && o != target | |
| 1271 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) | |
| 1272 { | |
| 1273 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) | |
| 1274 ; | |
| 1275 /* Keep initial / only if this is the whole name. */ | |
| 1276 if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
| 1277 ++o; | |
| 1278 p += 3; | |
| 1279 } | |
| 771 | 1280 else if (p > target |
| 1281 && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1282 { | |
| 1283 /* Collapse multiple `/' in a row. */ | |
| 1284 *o++ = *p++; | |
| 1285 while (IS_DIRECTORY_SEP (*p)) | |
| 1286 ++p; | |
| 1287 } | |
| 428 | 1288 else |
| 1289 { | |
| 1290 *o++ = *p++; | |
| 1291 } | |
| 1292 } | |
| 1293 | |
| 657 | 1294 #ifdef WIN32_FILENAMES |
| 428 | 1295 /* At last, set drive name, except for network file name. */ |
| 1296 if (drive) | |
| 1297 { | |
| 1298 target -= 2; | |
| 1299 target[0] = DRIVE_LETTER (drive); | |
| 1300 target[1] = ':'; | |
| 1301 } | |
| 657 | 1302 #ifdef WIN32_NATIVE |
| 428 | 1303 else |
| 1304 { | |
| 1305 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1])); | |
| 1306 } | |
| 657 | 1307 #endif |
| 771 | 1308 /* Reinsert the escape prefix if required. */ |
| 1309 if (is_escaped) | |
| 1310 { | |
| 1311 target -= 2; | |
| 1312 target[0] = '/'; | |
| 1313 target[1] = ':'; | |
| 1314 } | |
| 1315 | |
| 1316 *o = '\0'; | |
| 1317 | |
| 1318 { | |
| 867 | 1319 Ibyte *newtarget = mswindows_canonicalize_filename (target); |
|
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1320 Lisp_Object result = build_istring (newtarget); |
|
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diff
changeset
|
1321 xfree (newtarget); |
| 771 | 1322 |
| 2526 | 1323 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, result); |
| 771 | 1324 } |
| 1325 #else /* not WIN32_FILENAMES */ | |
| 2526 | 1326 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 1327 make_string (target, o - target)); | |
| 771 | 1328 #endif /* not WIN32_FILENAMES */ |
| 428 | 1329 } |
| 1330 | |
| 1331 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /* | |
| 444 | 1332 Return the canonical name of FILENAME. |
| 1333 Second arg DEFAULT is directory to start with if FILENAME is relative | |
| 428 | 1334 (does not start with slash); if DEFAULT is nil or missing, |
| 444 | 1335 the current buffer's value of `default-directory' is used. |
| 428 | 1336 No component of the resulting pathname will be a symbolic link, as |
| 1337 in the realpath() function. | |
| 1338 */ | |
| 1339 (filename, default_)) | |
| 1340 { | |
| 442 | 1341 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 428 | 1342 Lisp_Object expanded_name; |
| 1343 struct gcpro gcpro1; | |
| 1344 | |
| 1345 CHECK_STRING (filename); | |
| 1346 | |
| 1347 expanded_name = Fexpand_file_name (filename, default_); | |
| 1348 | |
| 1349 if (!STRINGP (expanded_name)) | |
| 1350 return Qnil; | |
| 1351 | |
| 1352 GCPRO1 (expanded_name); | |
| 442 | 1353 |
| 1354 { | |
| 1355 Lisp_Object handler = | |
| 1356 Ffind_file_name_handler (expanded_name, Qfile_truename); | |
| 1357 | |
| 1358 if (!NILP (handler)) | |
| 1359 RETURN_UNGCPRO | |
| 1360 (call2_check_string (handler, Qfile_truename, expanded_name)); | |
| 1361 } | |
| 428 | 1362 |
| 1363 { | |
| 2421 | 1364 Ibyte resolved_path[PATH_MAX_INTERNAL]; |
| 771 | 1365 Bytecount elen = XSTRING_LENGTH (expanded_name); |
| 867 | 1366 Ibyte *path; |
| 1367 Ibyte *p; | |
| 771 | 1368 |
| 1369 LISP_STRING_TO_ALLOCA (expanded_name, path); | |
| 988 | 1370 |
| 1111 | 1371 #if defined (WIN32_FILENAMES) && defined (CYGWIN) |
| 988 | 1372 /* When using win32 filenames in cygwin we want file-truename to |
| 1373 detect that c:/windows == /windows for example. */ | |
| 1111 | 1374 if (! (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))) |
| 1375 { | |
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1376 LOCAL_FILE_FORMAT_TO_INTERNAL_MSWIN (path, p); |
| 1111 | 1377 path = p; |
| 1378 } | |
| 988 | 1379 #endif |
| 428 | 1380 p = path; |
| 442 | 1381 |
| 428 | 1382 /* Try doing it all at once. */ |
| 2526 | 1383 if (!qxe_realpath (path, resolved_path, 0)) |
| 428 | 1384 { |
| 1385 /* Didn't resolve it -- have to do it one component at a time. */ | |
| 1386 /* "realpath" is a typically useless, stupid un*x piece of crap. | |
| 1387 It claims to return a useful value in the "error" case, but since | |
| 1388 there is no indication provided of how far along the pathname | |
| 1389 the function went before erring, there is no way to use the | |
| 442 | 1390 partial result returned. What a piece of junk. |
| 1391 | |
| 1392 The above comment refers to historical versions of | |
| 1393 realpath(). The Unix98 specs state: | |
| 1394 | |
| 1395 "On successful completion, realpath() returns a | |
| 1396 pointer to the resolved name. Otherwise, realpath() | |
| 1397 returns a null pointer and sets errno to indicate the | |
| 1398 error, and the contents of the buffer pointed to by | |
| 1399 resolved_name are undefined." | |
| 1400 | |
| 771 | 1401 Since we depend on undocumented semantics of various system |
| 2526 | 1402 realpath()s, we just use our own version in realpath.c. |
| 1403 | |
| 1404 Note also that our own version differs in its semantics from any | |
| 1405 standard version, since it accepts and returns internal-format | |
| 1406 text, not external-format. */ | |
| 428 | 1407 for (;;) |
| 1408 { | |
| 867 | 1409 Ibyte *pos; |
| 446 | 1410 |
| 657 | 1411 #ifdef WIN32_FILENAMES |
| 446 | 1412 if (IS_DRIVE (p[0]) && IS_DEVICE_SEP (p[1]) |
| 1413 && IS_DIRECTORY_SEP (p[2])) | |
| 1414 /* don't test c: on windows */ | |
| 1415 p = p+2; | |
| 1416 else if (IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1417 /* start after // */ | |
| 1418 p = p+1; | |
| 1419 #endif | |
| 1420 for (pos = p + 1; pos < path + elen; pos++) | |
| 1421 if (IS_DIRECTORY_SEP (*pos)) | |
| 1422 { | |
| 1423 *(p = pos) = 0; | |
| 1424 break; | |
| 1425 } | |
| 1426 if (p != pos) | |
| 1427 p = 0; | |
| 428 | 1428 |
| 2526 | 1429 if (qxe_realpath (path, resolved_path, 0)) |
| 428 | 1430 { |
| 1431 if (p) | |
| 446 | 1432 *p = DIRECTORY_SEP; |
| 428 | 1433 else |
| 1434 break; | |
| 1435 | |
| 1436 } | |
| 1437 else if (errno == ENOENT || errno == EACCES) | |
| 1438 { | |
| 1439 /* Failed on this component. Just tack on the rest of | |
| 1440 the string and we are done. */ | |
| 771 | 1441 int rlen = qxestrlen (resolved_path); |
| 428 | 1442 |
| 1443 /* "On failure, it returns NULL, sets errno to indicate | |
| 1444 the error, and places in resolved_path the absolute pathname | |
| 1445 of the path component which could not be resolved." */ | |
| 442 | 1446 |
| 1447 if (p) | |
| 428 | 1448 { |
| 1449 int plen = elen - (p - path); | |
| 1450 | |
| 446 | 1451 if (rlen > 1 && IS_DIRECTORY_SEP (resolved_path[rlen - 1])) |
| 428 | 1452 rlen = rlen - 1; |
| 1453 | |
| 1454 if (plen + rlen + 1 > countof (resolved_path)) | |
| 1455 goto toolong; | |
| 1456 | |
| 446 | 1457 resolved_path[rlen] = DIRECTORY_SEP; |
| 428 | 1458 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1); |
| 1459 } | |
| 1460 break; | |
| 1461 } | |
| 1462 else | |
| 1463 goto lose; | |
| 1464 } | |
| 1465 } | |
| 1466 | |
| 1467 { | |
| 442 | 1468 Lisp_Object resolved_name; |
| 771 | 1469 int rlen = qxestrlen (resolved_path); |
| 826 | 1470 if (elen > 0 && IS_DIRECTORY_SEP (string_byte (expanded_name, elen - 1)) |
| 446 | 1471 && !(rlen > 0 && IS_DIRECTORY_SEP (resolved_path[rlen - 1]))) |
| 428 | 1472 { |
| 1473 if (rlen + 1 > countof (resolved_path)) | |
| 1474 goto toolong; | |
| 446 | 1475 resolved_path[rlen++] = DIRECTORY_SEP; |
| 442 | 1476 resolved_path[rlen] = '\0'; |
| 428 | 1477 } |
| 771 | 1478 resolved_name = make_string (resolved_path, rlen); |
| 442 | 1479 RETURN_UNGCPRO (resolved_name); |
| 428 | 1480 } |
| 1481 | |
| 1482 toolong: | |
| 1483 errno = ENAMETOOLONG; | |
| 1484 goto lose; | |
| 1485 lose: | |
| 563 | 1486 report_file_error ("Finding truename", expanded_name); |
| 428 | 1487 } |
| 442 | 1488 RETURN_UNGCPRO (Qnil); |
| 428 | 1489 } |
| 1490 | |
| 1491 | |
| 1492 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /* | |
| 1493 Substitute environment variables referred to in FILENAME. | |
| 1494 `$FOO' where FOO is an environment variable name means to substitute | |
| 1495 the value of that variable. The variable name should be terminated | |
| 444 | 1496 with a character, not a letter, digit or underscore; otherwise, enclose |
| 428 | 1497 the entire variable name in braces. |
| 1498 If `/~' appears, all of FILENAME through that `/' is discarded. | |
| 1499 */ | |
| 444 | 1500 (filename)) |
| 428 | 1501 { |
| 442 | 1502 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 867 | 1503 Ibyte *nm; |
| 1504 | |
|
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|
1505 Ibyte *s, *p, *o, *x, *endp, *got; |
| 867 | 1506 Ibyte *target = 0; |
| 428 | 1507 int total = 0; |
|
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|
1508 int substituted = 0, seen_braces; |
| 867 | 1509 Ibyte *xnm; |
| 428 | 1510 Lisp_Object handler; |
| 1511 | |
| 444 | 1512 CHECK_STRING (filename); |
| 428 | 1513 |
| 1514 /* If the file name has special constructs in it, | |
| 1515 call the corresponding file handler. */ | |
| 444 | 1516 handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
| 428 | 1517 if (!NILP (handler)) |
| 1518 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name, | |
| 444 | 1519 filename); |
| 1520 | |
| 1521 nm = XSTRING_DATA (filename); | |
| 1522 endp = nm + XSTRING_LENGTH (filename); | |
| 428 | 1523 |
| 1524 /* If /~ or // appears, discard everything through first slash. */ | |
| 1525 | |
| 1526 for (p = nm; p != endp; p++) | |
| 1527 { | |
| 1528 if ((p[0] == '~' | |
| 657 | 1529 #if defined (WIN32_FILENAMES) |
| 440 | 1530 /* // at start of file name is meaningful in WindowsNT systems */ |
| 428 | 1531 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm) |
| 657 | 1532 #else /* not (WIN32_FILENAMES) */ |
| 428 | 1533 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1534 #endif /* not (WIN32_FILENAMES) */ |
| 428 | 1535 ) |
| 1536 && p != nm | |
| 1537 && (IS_DIRECTORY_SEP (p[-1]))) | |
| 1538 { | |
| 1539 nm = p; | |
| 1540 substituted = 1; | |
| 1541 } | |
| 657 | 1542 #ifdef WIN32_FILENAMES |
| 428 | 1543 /* see comment in expand-file-name about drive specifiers */ |
| 1544 else if (IS_DRIVE (p[0]) && p[1] == ':' | |
| 1545 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1546 { | |
| 1547 nm = p; | |
| 1548 substituted = 1; | |
| 1549 } | |
| 657 | 1550 #endif /* WIN32_FILENAMES */ |
| 428 | 1551 } |
| 1552 | |
| 1553 /* See if any variables are substituted into the string | |
| 1554 and find the total length of their values in `total' */ | |
| 1555 | |
| 1556 for (p = nm; p != endp;) | |
| 1557 if (*p != '$') | |
| 1558 p++; | |
| 1559 else | |
| 1560 { | |
| 1561 p++; | |
| 1562 if (p == endp) | |
|
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|
1563 { |
|
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|
1564 /* No substitution, no error. */ |
|
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|
1565 break; |
|
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|
1566 } |
| 428 | 1567 else if (*p == '$') |
| 1568 { | |
| 1569 /* "$$" means a single "$" */ | |
| 1570 p++; | |
| 1571 total -= 1; | |
| 1572 substituted = 1; | |
| 1573 continue; | |
| 1574 } | |
| 1575 else if (*p == '{') | |
| 1576 { | |
| 1577 o = ++p; | |
| 1578 while (p != endp && *p != '}') p++; | |
|
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|
1579 if (*p != '}') |
|
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|
1580 { |
|
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|
1581 /* No substitution, no error. Keep looking. */ |
|
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|
1582 p = o; |
|
5e526366d533
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|
1583 continue; |
|
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|
1584 } |
| 428 | 1585 s = p; |
| 1586 } | |
| 1587 else | |
| 1588 { | |
| 1589 o = p; | |
| 1590 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1591 s = p; | |
| 1592 } | |
| 1593 | |
| 1594 /* Copy out the variable name */ | |
| 2367 | 1595 target = alloca_ibytes (s - o + 1); |
| 771 | 1596 qxestrncpy (target, o, s - o); |
| 428 | 1597 target[s - o] = 0; |
| 442 | 1598 #ifdef WIN32_NATIVE |
| 1204 | 1599 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1600 #endif /* WIN32_NATIVE */ |
| 428 | 1601 |
| 1602 /* Get variable value */ | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1603 got = egetenv ((CIbyte *) target); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1604 if (got) |
|
5e526366d533
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|
1605 { |
|
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|
1606 total += qxestrlen (got); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1607 substituted = 1; |
|
5e526366d533
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4266
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|
1608 } |
| 428 | 1609 } |
| 1610 | |
| 1611 if (!substituted) | |
| 444 | 1612 return filename; |
| 1613 | |
| 1614 /* If substitution required, recopy the filename and do it */ | |
| 428 | 1615 /* Make space in stack frame for the new copy */ |
| 2367 | 1616 xnm = alloca_ibytes (XSTRING_LENGTH (filename) + total + 1); |
| 428 | 1617 x = xnm; |
| 1618 | |
| 1619 /* Copy the rest of the name through, replacing $ constructs with values */ | |
| 1620 for (p = nm; *p;) | |
| 1621 if (*p != '$') | |
| 1622 *x++ = *p++; | |
| 1623 else | |
| 1624 { | |
| 1625 p++; | |
|
4324
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|
1626 seen_braces = 0; |
| 428 | 1627 if (p == endp) |
|
4324
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|
1628 { |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1629 *x++ = '$'; |
|
5e526366d533
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Aidan Kehoe <kehoea@parhasard.net>
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4266
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|
1630 break; |
|
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Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
diff
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|
1631 } |
| 428 | 1632 else if (*p == '$') |
| 1633 { | |
| 1634 *x++ = *p++; | |
| 1635 continue; | |
| 1636 } | |
| 1637 else if (*p == '{') | |
| 1638 { | |
|
4324
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Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
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|
1639 seen_braces = 1; |
| 428 | 1640 o = ++p; |
| 1641 while (p != endp && *p != '}') p++; | |
|
4324
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Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
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|
1642 if (*p != '}') |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
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4266
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|
1643 { |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
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4266
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changeset
|
1644 /* Don't syntax error, don't substitute */ |
|
5e526366d533
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4266
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changeset
|
1645 *x++ = '{'; |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
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|
1646 p = o; |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
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|
1647 continue; |
|
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Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
diff
changeset
|
1648 } |
| 428 | 1649 s = p++; |
| 1650 } | |
| 1651 else | |
| 1652 { | |
| 1653 o = p; | |
| 1654 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1655 s = p; | |
| 1656 } | |
| 1657 | |
| 1658 /* Copy out the variable name */ | |
| 2367 | 1659 target = alloca_ibytes (s - o + 1); |
| 771 | 1660 qxestrncpy (target, o, s - o); |
| 428 | 1661 target[s - o] = 0; |
| 442 | 1662 #ifdef WIN32_NATIVE |
| 1204 | 1663 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1664 #endif /* WIN32_NATIVE */ |
| 428 | 1665 |
| 1666 /* Get variable value */ | |
|
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|
1667 got = egetenv ((CIbyte *) target); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1668 if (got) |
|
5e526366d533
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changeset
|
1669 { |
|
5e526366d533
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changeset
|
1670 qxestrcpy (x, got); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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changeset
|
1671 x += qxestrlen (got); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1672 } |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1673 else |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
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changeset
|
1674 { |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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changeset
|
1675 *x++ = '$'; |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1676 if (seen_braces) |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1677 { |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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changeset
|
1678 *x++ = '{'; |
|
5e526366d533
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|
1679 /* Preserve the original case. */ |
|
5e526366d533
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changeset
|
1680 qxestrncpy (x, o, s - o); |
|
5e526366d533
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|
1681 x += s - o; |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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changeset
|
1682 *x++ = '}'; |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1683 } |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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changeset
|
1684 else |
|
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Don't error on unknown environment variables, #'substitute-in-file-name.
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4266
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|
1685 { |
|
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Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1686 /* Preserve the original case. */ |
|
5e526366d533
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|
1687 qxestrncpy (x, o, s - o); |
|
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1688 x += s - o; |
|
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|
1689 } |
|
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|
1690 } |
| 428 | 1691 } |
| 1692 | |
| 1693 *x = 0; | |
| 1694 | |
| 1695 /* If /~ or // appears, discard everything through first slash. */ | |
| 1696 | |
| 1697 for (p = xnm; p != x; p++) | |
| 1698 if ((p[0] == '~' | |
| 657 | 1699 #if defined (WIN32_FILENAMES) |
| 428 | 1700 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm) |
| 657 | 1701 #else /* not WIN32_FILENAMES */ |
| 428 | 1702 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1703 #endif /* not WIN32_FILENAMES */ |
| 428 | 1704 ) |
| 1705 /* don't do p[-1] if that would go off the beginning --jwz */ | |
| 1706 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1])) | |
| 1707 xnm = p; | |
| 657 | 1708 #ifdef WIN32_FILENAMES |
| 428 | 1709 else if (IS_DRIVE (p[0]) && p[1] == ':' |
| 1710 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1711 xnm = p; | |
| 1712 #endif | |
| 1713 | |
| 1714 return make_string (xnm, x - xnm); | |
| 1715 } | |
| 1716 | |
| 1717 /* A slightly faster and more convenient way to get | |
| 1718 (directory-file-name (expand-file-name FOO)). */ | |
| 1719 | |
| 1720 Lisp_Object | |
| 1721 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) | |
| 1722 { | |
| 442 | 1723 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1724 Lisp_Object abspath; |
| 1725 struct gcpro gcpro1; | |
| 1726 | |
| 1727 abspath = Fexpand_file_name (filename, defdir); | |
| 1728 GCPRO1 (abspath); | |
| 1729 /* Remove final slash, if any (unless path is root). | |
| 1730 stat behaves differently depending! */ | |
| 1731 if (XSTRING_LENGTH (abspath) > 1 | |
| 826 | 1732 && IS_DIRECTORY_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 1)) |
| 1733 && !IS_DEVICE_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 2))) | |
| 428 | 1734 /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1735 abspath = Fdirectory_file_name (abspath); | |
| 1736 UNGCPRO; | |
| 1737 return abspath; | |
| 1738 } | |
| 1739 | |
| 1740 /* Signal an error if the file ABSNAME already exists. | |
| 1741 If INTERACTIVE is nonzero, ask the user whether to proceed, | |
| 1742 and bypass the error if the user says to go ahead. | |
| 1743 QUERYSTRING is a name for the action that is being considered | |
| 1744 to alter the file. | |
| 1745 *STATPTR is used to store the stat information if the file exists. | |
| 1746 If the file does not exist, STATPTR->st_mode is set to 0. */ | |
| 1747 | |
| 1748 static void | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
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4867
diff
changeset
|
1749 barf_or_query_if_file_exists (Lisp_Object absname, const Ascbyte *querystring, |
| 428 | 1750 int interactive, struct stat *statptr) |
| 1751 { | |
| 442 | 1752 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1753 struct stat statbuf; |
| 1754 | |
| 1755 /* stat is a good way to tell whether the file exists, | |
| 1756 regardless of what access permissions it has. */ | |
| 771 | 1757 if (qxe_stat (XSTRING_DATA (absname), &statbuf) >= 0) |
| 428 | 1758 { |
| 1759 Lisp_Object tem; | |
| 1760 | |
| 1761 if (interactive) | |
| 1762 { | |
| 1763 Lisp_Object prompt; | |
| 1764 struct gcpro gcpro1; | |
| 1765 | |
| 771 | 1766 prompt = |
| 1767 emacs_sprintf_string | |
|
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1768 (GETTEXT ("File %s already exists; %s anyway? "), |
|
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|
1769 XSTRING_DATA (absname), GETTEXT (querystring)); |
| 428 | 1770 |
| 1771 GCPRO1 (prompt); | |
| 1772 tem = call1 (Qyes_or_no_p, prompt); | |
| 1773 UNGCPRO; | |
| 1774 } | |
| 1775 else | |
| 1776 tem = Qnil; | |
| 1777 | |
| 1778 if (NILP (tem)) | |
| 1779 Fsignal (Qfile_already_exists, | |
| 771 | 1780 list2 (build_msg_string ("File already exists"), |
| 428 | 1781 absname)); |
| 1782 if (statptr) | |
| 1783 *statptr = statbuf; | |
| 1784 } | |
| 1785 else | |
| 1786 { | |
| 1787 if (statptr) | |
| 1788 statptr->st_mode = 0; | |
| 1789 } | |
| 1790 return; | |
| 1791 } | |
| 1792 | |
| 1793 DEFUN ("copy-file", Fcopy_file, 2, 4, | |
| 1794 "fCopy file: \nFCopy %s to file: \np\nP", /* | |
| 444 | 1795 Copy FILENAME to NEWNAME. Both args must be strings. |
| 428 | 1796 Signals a `file-already-exists' error if file NEWNAME already exists, |
| 1797 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil. | |
| 1798 A number as third arg means request confirmation if NEWNAME already exists. | |
| 1799 This is what happens in interactive use with M-x. | |
| 1800 Fourth arg KEEP-TIME non-nil means give the new file the same | |
| 1801 last-modified time as the old one. (This works on only some systems.) | |
| 1802 A prefix arg makes KEEP-TIME non-nil. | |
| 1803 */ | |
| 1804 (filename, newname, ok_if_already_exists, keep_time)) | |
| 1805 { | |
| 442 | 1806 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1807 int ifd, ofd, n; |
|
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|
1808 Rawbyte buf[16 * 1024]; |
| 428 | 1809 struct stat st, out_st; |
| 1810 Lisp_Object handler; | |
| 1811 int speccount = specpdl_depth (); | |
| 1812 struct gcpro gcpro1, gcpro2; | |
| 1813 /* Lisp_Object args[6]; */ | |
| 1814 int input_file_statable_p; | |
| 1815 | |
| 1816 GCPRO2 (filename, newname); | |
| 1817 CHECK_STRING (filename); | |
| 1818 CHECK_STRING (newname); | |
| 1819 filename = Fexpand_file_name (filename, Qnil); | |
| 1820 newname = Fexpand_file_name (newname, Qnil); | |
| 1821 | |
| 1822 /* If the input file name has special constructs in it, | |
| 1823 call the corresponding file handler. */ | |
| 1824 handler = Ffind_file_name_handler (filename, Qcopy_file); | |
| 1825 /* Likewise for output file name. */ | |
| 1826 if (NILP (handler)) | |
| 1827 handler = Ffind_file_name_handler (newname, Qcopy_file); | |
| 1828 if (!NILP (handler)) | |
| 1829 { | |
| 1830 UNGCPRO; | |
| 1831 return call5 (handler, Qcopy_file, filename, newname, | |
| 1832 ok_if_already_exists, keep_time); | |
| 1833 } | |
| 1834 | |
| 1835 /* When second argument is a directory, copy the file into it. | |
| 1836 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo") | |
| 1837 */ | |
| 1838 if (!NILP (Ffile_directory_p (newname))) | |
| 1839 { | |
| 1840 Lisp_Object args[3]; | |
| 1841 struct gcpro ngcpro1; | |
| 1842 int i = 1; | |
| 1843 | |
| 1844 args[0] = newname; | |
| 1845 args[1] = Qnil; args[2] = Qnil; | |
| 1846 NGCPRO1 (*args); | |
| 1847 ngcpro1.nvars = 3; | |
| 826 | 1848 if (!IS_DIRECTORY_SEP (string_byte (newname, |
| 442 | 1849 XSTRING_LENGTH (newname) - 1))) |
| 1850 | |
| 1851 args[i++] = Fchar_to_string (Vdirectory_sep_char); | |
| 428 | 1852 args[i++] = Ffile_name_nondirectory (filename); |
| 1853 newname = Fconcat (i, args); | |
| 1854 NUNGCPRO; | |
| 1855 } | |
| 1856 | |
| 1857 if (NILP (ok_if_already_exists) | |
| 1858 || INTP (ok_if_already_exists)) | |
| 1859 barf_or_query_if_file_exists (newname, "copy to it", | |
| 1860 INTP (ok_if_already_exists), &out_st); | |
| 771 | 1861 else if (qxe_stat (XSTRING_DATA (newname), &out_st) < 0) |
| 428 | 1862 out_st.st_mode = 0; |
| 1863 | |
| 771 | 1864 ifd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 1865 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 1866 if (ifd < 0) |
| 563 | 1867 report_file_error ("Opening input file", filename); |
| 428 | 1868 |
| 1869 record_unwind_protect (close_file_unwind, make_int (ifd)); | |
| 1870 | |
| 1871 /* We can only copy regular files and symbolic links. Other files are not | |
| 1872 copyable by us. */ | |
| 771 | 1873 input_file_statable_p = (qxe_fstat (ifd, &st) >= 0); |
| 428 | 1874 |
| 442 | 1875 #ifndef WIN32_NATIVE |
| 428 | 1876 if (out_st.st_mode != 0 |
| 1877 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
| 1878 { | |
| 1879 errno = 0; | |
| 1880 report_file_error ("Input and output files are the same", | |
| 563 | 1881 list3 (Qunbound, filename, newname)); |
| 428 | 1882 } |
| 1883 #endif | |
| 1884 | |
| 1885 #if defined (S_ISREG) && defined (S_ISLNK) | |
| 1886 if (input_file_statable_p) | |
| 1887 { | |
| 1888 if (!(S_ISREG (st.st_mode)) | |
| 1889 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */ | |
| 1890 #ifdef S_ISCHR | |
| 1891 && !(S_ISCHR (st.st_mode)) | |
| 1892 #endif | |
| 1893 && !(S_ISLNK (st.st_mode))) | |
| 1894 { | |
| 1895 #if defined (EISDIR) | |
| 1896 /* Get a better looking error message. */ | |
| 1897 errno = EISDIR; | |
| 1898 #endif /* EISDIR */ | |
| 563 | 1899 report_file_error ("Non-regular file", filename); |
| 428 | 1900 } |
| 1901 } | |
| 1902 #endif /* S_ISREG && S_ISLNK */ | |
| 1903 | |
| 771 | 1904 ofd = qxe_open (XSTRING_DATA (newname), |
| 1905 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE); | |
| 428 | 1906 if (ofd < 0) |
| 563 | 1907 report_file_error ("Opening output file", newname); |
| 428 | 1908 |
| 1909 { | |
| 1910 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil); | |
| 1911 | |
| 1912 record_unwind_protect (close_file_unwind, ofd_locative); | |
| 1913 | |
| 1914 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0) | |
| 1915 { | |
| 1916 if (write_allowing_quit (ofd, buf, n) != n) | |
| 563 | 1917 report_file_error ("I/O error", newname); |
| 428 | 1918 } |
| 1919 | |
| 1920 /* Closing the output clobbers the file times on some systems. */ | |
| 771 | 1921 if (retry_close (ofd) < 0) |
| 563 | 1922 report_file_error ("I/O error", newname); |
| 428 | 1923 |
| 1924 if (input_file_statable_p) | |
| 1925 { | |
| 442 | 1926 if (!NILP (keep_time)) |
| 1927 { | |
| 1928 EMACS_TIME atime, mtime; | |
| 1929 EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
| 1930 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
| 592 | 1931 if (set_file_times (newname, atime, mtime)) |
| 1932 report_file_error ("I/O error", list1 (newname)); | |
| 442 | 1933 } |
| 771 | 1934 qxe_chmod (XSTRING_DATA (newname), st.st_mode & 07777); |
| 428 | 1935 } |
| 1936 | |
| 1937 /* We'll close it by hand */ | |
| 1938 XCAR (ofd_locative) = Qnil; | |
| 1939 | |
| 1940 /* Close ifd */ | |
| 771 | 1941 unbind_to (speccount); |
| 428 | 1942 } |
| 1943 | |
| 1944 UNGCPRO; | |
| 1945 return Qnil; | |
| 1946 } | |
| 1947 | |
| 1948 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /* | |
| 1949 Create a directory. One argument, a file name string. | |
| 1950 */ | |
| 1951 (dirname_)) | |
| 1952 { | |
| 1953 /* This function can GC. GC checked 1997.04.06. */ | |
| 1954 Lisp_Object handler; | |
| 1955 struct gcpro gcpro1; | |
| 771 | 1956 DECLARE_EISTRING (dir); |
| 428 | 1957 |
| 1958 CHECK_STRING (dirname_); | |
| 1959 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1960 | |
| 1961 GCPRO1 (dirname_); | |
| 1962 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal); | |
| 1963 UNGCPRO; | |
| 1964 if (!NILP (handler)) | |
| 1965 return (call2 (handler, Qmake_directory_internal, dirname_)); | |
| 1966 | |
| 771 | 1967 eicpy_lstr (dir, dirname_); |
| 1968 if (eigetch_char (dir, eicharlen (dir) - 1) == '/') | |
| 1969 eidel (dir, eilen (dir) - 1, -1, 1, -1); | |
| 1970 | |
| 1971 if (qxe_mkdir (eidata (dir), 0777) != 0) | |
| 563 | 1972 report_file_error ("Creating directory", dirname_); |
| 428 | 1973 |
| 1974 return Qnil; | |
| 1975 } | |
| 1976 | |
| 1977 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /* | |
| 1978 Delete a directory. One argument, a file name or directory name string. | |
| 1979 */ | |
| 1980 (dirname_)) | |
| 1981 { | |
| 1982 /* This function can GC. GC checked 1997.04.06. */ | |
| 1983 Lisp_Object handler; | |
| 1984 struct gcpro gcpro1; | |
| 1985 | |
| 1986 CHECK_STRING (dirname_); | |
| 1987 | |
| 1988 GCPRO1 (dirname_); | |
| 1989 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1990 dirname_ = Fdirectory_file_name (dirname_); | |
| 1991 | |
| 1992 handler = Ffind_file_name_handler (dirname_, Qdelete_directory); | |
| 1993 UNGCPRO; | |
| 1994 if (!NILP (handler)) | |
| 1995 return (call2 (handler, Qdelete_directory, dirname_)); | |
| 1996 | |
| 771 | 1997 if (qxe_rmdir (XSTRING_DATA (dirname_)) != 0) |
| 563 | 1998 report_file_error ("Removing directory", dirname_); |
| 428 | 1999 |
| 2000 return Qnil; | |
| 2001 } | |
| 2002 | |
| 2003 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /* | |
| 442 | 2004 Delete the file named FILENAME (a string). |
| 2005 If FILENAME has multiple names, it continues to exist with the other names. | |
| 428 | 2006 */ |
| 2007 (filename)) | |
| 2008 { | |
| 2009 /* This function can GC. GC checked 1997.04.06. */ | |
| 2010 Lisp_Object handler; | |
| 2011 struct gcpro gcpro1; | |
| 2012 | |
| 2013 CHECK_STRING (filename); | |
| 2014 filename = Fexpand_file_name (filename, Qnil); | |
| 2015 | |
| 2016 GCPRO1 (filename); | |
| 2017 handler = Ffind_file_name_handler (filename, Qdelete_file); | |
| 2018 UNGCPRO; | |
| 2019 if (!NILP (handler)) | |
| 2020 return call2 (handler, Qdelete_file, filename); | |
| 2021 | |
| 771 | 2022 if (0 > qxe_unlink (XSTRING_DATA (filename))) |
| 563 | 2023 report_file_error ("Removing old name", filename); |
| 428 | 2024 return Qnil; |
| 2025 } | |
| 2026 | |
| 2027 static Lisp_Object | |
| 2286 | 2028 internal_delete_file_1 (Lisp_Object UNUSED (ignore), |
| 2029 Lisp_Object UNUSED (ignore2)) | |
| 428 | 2030 { |
| 2031 return Qt; | |
| 2032 } | |
| 2033 | |
| 2034 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
| 2035 | |
| 2036 int | |
| 2037 internal_delete_file (Lisp_Object filename) | |
| 2038 { | |
| 2039 /* This function can GC. GC checked 1997.04.06. */ | |
| 2040 return NILP (condition_case_1 (Qt, Fdelete_file, filename, | |
| 2041 internal_delete_file_1, Qnil)); | |
| 2042 } | |
| 2043 | |
| 2044 DEFUN ("rename-file", Frename_file, 2, 3, | |
| 2045 "fRename file: \nFRename %s to file: \np", /* | |
| 444 | 2046 Rename FILENAME as NEWNAME. Both args must be strings. |
| 2047 If file has names other than FILENAME, it continues to have those names. | |
| 428 | 2048 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2049 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2050 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2051 This is what happens in interactive use with M-x. | |
| 2052 */ | |
| 2053 (filename, newname, ok_if_already_exists)) | |
| 2054 { | |
| 2055 /* This function can GC. GC checked 1997.04.06. */ | |
| 2056 Lisp_Object handler; | |
| 2057 struct gcpro gcpro1, gcpro2; | |
| 2058 | |
| 2059 GCPRO2 (filename, newname); | |
| 2060 CHECK_STRING (filename); | |
| 2061 CHECK_STRING (newname); | |
| 2062 filename = Fexpand_file_name (filename, Qnil); | |
| 2063 newname = Fexpand_file_name (newname, Qnil); | |
| 2064 | |
| 2065 /* If the file name has special constructs in it, | |
| 2066 call the corresponding file handler. */ | |
| 2067 handler = Ffind_file_name_handler (filename, Qrename_file); | |
| 2068 if (NILP (handler)) | |
| 2069 handler = Ffind_file_name_handler (newname, Qrename_file); | |
| 2070 if (!NILP (handler)) | |
| 2071 { | |
| 2072 UNGCPRO; | |
| 2073 return call4 (handler, Qrename_file, | |
| 2074 filename, newname, ok_if_already_exists); | |
| 2075 } | |
| 2076 | |
| 2077 /* When second argument is a directory, rename the file into it. | |
| 2078 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo") | |
| 2079 */ | |
| 2080 if (!NILP (Ffile_directory_p (newname))) | |
| 2081 { | |
| 2082 Lisp_Object args[3]; | |
| 2083 struct gcpro ngcpro1; | |
| 2084 int i = 1; | |
| 2085 | |
| 2086 args[0] = newname; | |
| 2087 args[1] = Qnil; args[2] = Qnil; | |
| 2088 NGCPRO1 (*args); | |
| 2089 ngcpro1.nvars = 3; | |
| 826 | 2090 if (string_byte (newname, XSTRING_LENGTH (newname) - 1) != '/') |
|
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parents:
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diff
changeset
|
2091 args[i++] = build_ascstring ("/"); |
| 428 | 2092 args[i++] = Ffile_name_nondirectory (filename); |
| 2093 newname = Fconcat (i, args); | |
| 2094 NUNGCPRO; | |
| 2095 } | |
| 2096 | |
| 2097 if (NILP (ok_if_already_exists) | |
| 2098 || INTP (ok_if_already_exists)) | |
| 2099 barf_or_query_if_file_exists (newname, "rename to it", | |
| 2100 INTP (ok_if_already_exists), 0); | |
| 2101 | |
| 442 | 2102 /* We have configure check for rename() and emulate using |
| 2103 link()/unlink() if necessary. */ | |
| 771 | 2104 if (0 > qxe_rename (XSTRING_DATA (filename), XSTRING_DATA (newname))) |
| 428 | 2105 { |
| 2106 if (errno == EXDEV) | |
| 2107 { | |
| 2108 Fcopy_file (filename, newname, | |
| 2109 /* We have already prompted if it was an integer, | |
| 2110 so don't have copy-file prompt again. */ | |
| 2111 (NILP (ok_if_already_exists) ? Qnil : Qt), | |
| 2112 Qt); | |
| 2113 Fdelete_file (filename); | |
| 2114 } | |
| 2115 else | |
| 2116 { | |
| 563 | 2117 report_file_error ("Renaming", list3 (Qunbound, filename, newname)); |
| 428 | 2118 } |
| 2119 } | |
| 2120 UNGCPRO; | |
| 2121 return Qnil; | |
| 2122 } | |
| 2123 | |
| 2124 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3, | |
| 2125 "fAdd name to file: \nFName to add to %s: \np", /* | |
| 444 | 2126 Give FILENAME additional name NEWNAME. Both args must be strings. |
| 428 | 2127 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2128 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2129 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2130 This is what happens in interactive use with M-x. | |
| 2131 */ | |
| 2132 (filename, newname, ok_if_already_exists)) | |
| 2133 { | |
| 2134 /* This function can GC. GC checked 1997.04.06. */ | |
| 2135 Lisp_Object handler; | |
| 2136 struct gcpro gcpro1, gcpro2; | |
| 2137 | |
| 2138 GCPRO2 (filename, newname); | |
| 2139 CHECK_STRING (filename); | |
| 2140 CHECK_STRING (newname); | |
| 2141 filename = Fexpand_file_name (filename, Qnil); | |
| 2142 newname = Fexpand_file_name (newname, Qnil); | |
| 2143 | |
| 2144 /* If the file name has special constructs in it, | |
| 2145 call the corresponding file handler. */ | |
| 2146 handler = Ffind_file_name_handler (filename, Qadd_name_to_file); | |
| 2147 if (!NILP (handler)) | |
| 2148 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2149 newname, ok_if_already_exists)); | |
| 2150 | |
| 2151 /* If the new name has special constructs in it, | |
| 2152 call the corresponding file handler. */ | |
| 2153 handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
| 2154 if (!NILP (handler)) | |
| 2155 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2156 newname, ok_if_already_exists)); | |
| 2157 | |
| 2158 if (NILP (ok_if_already_exists) | |
| 2159 || INTP (ok_if_already_exists)) | |
| 2160 barf_or_query_if_file_exists (newname, "make it a new name", | |
| 2161 INTP (ok_if_already_exists), 0); | |
| 771 | 2162 /* #### Emacs 20.6 contains an implementation of link() in w32.c. |
| 2163 Need to port. */ | |
| 2164 #ifndef HAVE_LINK | |
| 563 | 2165 signal_error_2 (Qunimplemented, "Adding new name", filename, newname); |
| 771 | 2166 #else /* HAVE_LINK */ |
| 2167 qxe_unlink (XSTRING_DATA (newname)); | |
| 2168 if (0 > qxe_link (XSTRING_DATA (filename), XSTRING_DATA (newname))) | |
| 428 | 2169 { |
| 2170 report_file_error ("Adding new name", | |
| 563 | 2171 list3 (Qunbound, filename, newname)); |
| 428 | 2172 } |
| 771 | 2173 #endif /* HAVE_LINK */ |
| 428 | 2174 |
| 2175 UNGCPRO; | |
| 2176 return Qnil; | |
| 2177 } | |
| 2178 | |
| 2179 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3, | |
| 2180 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /* | |
| 2181 Make a symbolic link to FILENAME, named LINKNAME. Both args strings. | |
| 2182 Signals a `file-already-exists' error if a file LINKNAME already exists | |
| 2183 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2184 A number as third arg means request confirmation if LINKNAME already exists. | |
| 2185 This happens for interactive use with M-x. | |
|
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diff
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|
2186 |
|
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Document Win32 symlink behaviour; adjust tests to take it into a/c.
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diff
changeset
|
2187 On platforms where symbolic links are not available, any file handlers will |
|
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changeset
|
2188 be run, but the check for the existence of LINKNAME will not be done, and |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2189 the symbolic link will not be created. |
| 428 | 2190 */ |
| 2191 (filename, linkname, ok_if_already_exists)) | |
| 2192 { | |
| 2193 /* This function can GC. GC checked 1997.06.04. */ | |
| 442 | 2194 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 428 | 2195 Lisp_Object handler; |
| 2196 struct gcpro gcpro1, gcpro2; | |
| 2197 | |
| 2198 GCPRO2 (filename, linkname); | |
| 2199 CHECK_STRING (filename); | |
| 2200 CHECK_STRING (linkname); | |
| 2201 /* If the link target has a ~, we must expand it to get | |
| 2202 a truly valid file name. Otherwise, do not expand; | |
| 2203 we want to permit links to relative file names. */ | |
| 826 | 2204 if (string_byte (filename, 0) == '~') |
| 428 | 2205 filename = Fexpand_file_name (filename, Qnil); |
| 2206 linkname = Fexpand_file_name (linkname, Qnil); | |
| 2207 | |
| 2208 /* If the file name has special constructs in it, | |
| 2209 call the corresponding file handler. */ | |
| 2210 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); | |
| 2211 if (!NILP (handler)) | |
| 2212 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, | |
| 2213 ok_if_already_exists)); | |
| 2214 | |
| 2215 /* If the new link name has special constructs in it, | |
| 2216 call the corresponding file handler. */ | |
| 2217 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
| 2218 if (!NILP (handler)) | |
| 2219 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
| 2220 linkname, ok_if_already_exists)); | |
| 2221 | |
| 771 | 2222 #ifdef HAVE_SYMLINK |
| 428 | 2223 if (NILP (ok_if_already_exists) |
| 2224 || INTP (ok_if_already_exists)) | |
| 2225 barf_or_query_if_file_exists (linkname, "make it a link", | |
| 2226 INTP (ok_if_already_exists), 0); | |
| 2227 | |
| 771 | 2228 qxe_unlink (XSTRING_DATA (linkname)); |
| 2229 if (0 > qxe_symlink (XSTRING_DATA (filename), | |
| 2230 XSTRING_DATA (linkname))) | |
| 428 | 2231 { |
| 2232 report_file_error ("Making symbolic link", | |
| 563 | 2233 list3 (Qunbound, filename, linkname)); |
| 428 | 2234 } |
| 771 | 2235 #endif |
| 442 | 2236 |
| 428 | 2237 UNGCPRO; |
| 2238 return Qnil; | |
| 2239 } | |
| 2240 | |
| 2241 #ifdef HPUX_NET | |
| 2242 | |
| 2243 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /* | |
| 2244 Open a network connection to PATH using LOGIN as the login string. | |
| 2245 */ | |
| 2246 (path, login)) | |
| 2247 { | |
| 2248 int netresult; | |
| 1333 | 2249 const Extbyte *path_ext; |
| 2250 const Extbyte *login_ext; | |
| 428 | 2251 |
| 2252 CHECK_STRING (path); | |
| 2253 CHECK_STRING (login); | |
| 2254 | |
| 2255 /* netunam, being a strange-o system call only used once, is not | |
| 2256 encapsulated. */ | |
| 440 | 2257 |
|
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2258 LISP_PATHNAME_CONVERT_OUT (path, path_ext); |
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2259 login_ext = LISP_STRING_TO_EXTERNAL (login, Quser_name_encoding); |
| 440 | 2260 |
| 2261 netresult = netunam (path_ext, login_ext); | |
| 2262 | |
| 2263 return netresult == -1 ? Qnil : Qt; | |
| 428 | 2264 } |
| 2265 #endif /* HPUX_NET */ | |
| 2266 | |
| 2267 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /* | |
| 2268 Return t if file FILENAME specifies an absolute path name. | |
| 2269 On Unix, this is a name starting with a `/' or a `~'. | |
| 2270 */ | |
| 2271 (filename)) | |
| 2272 { | |
| 2273 /* This function does not GC */ | |
| 867 | 2274 Ibyte *ptr; |
| 428 | 2275 |
| 2276 CHECK_STRING (filename); | |
| 2277 ptr = XSTRING_DATA (filename); | |
| 2278 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~' | |
| 657 | 2279 #ifdef WIN32_FILENAMES |
| 428 | 2280 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2])) |
| 2281 #endif | |
| 2282 ) ? Qt : Qnil; | |
| 2283 } | |
| 2284 | |
| 2285 /* Return nonzero if file FILENAME exists and can be executed. */ | |
| 2286 | |
| 2287 static int | |
| 771 | 2288 check_executable (Lisp_Object filename) |
| 428 | 2289 { |
| 442 | 2290 #ifdef WIN32_NATIVE |
| 428 | 2291 struct stat st; |
| 771 | 2292 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2293 return 0; |
| 2294 return ((st.st_mode & S_IEXEC) != 0); | |
| 442 | 2295 #else /* not WIN32_NATIVE */ |
| 428 | 2296 #ifdef HAVE_EACCESS |
| 771 | 2297 return qxe_eaccess (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2298 #else |
| 2299 /* Access isn't quite right because it uses the real uid | |
| 2300 and we really want to test with the effective uid. | |
| 2301 But Unix doesn't give us a right way to do it. */ | |
| 771 | 2302 return qxe_access (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2303 #endif /* HAVE_EACCESS */ |
| 442 | 2304 #endif /* not WIN32_NATIVE */ |
| 428 | 2305 } |
| 2306 | |
| 2307 /* Return nonzero if file FILENAME exists and can be written. */ | |
| 2308 | |
| 2309 static int | |
| 867 | 2310 check_writable (const Ibyte *filename) |
| 428 | 2311 { |
|
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2312 #ifdef WIN32_ANY |
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2313 // Since this has to work for a directory, we can't just call 'CreateFile' |
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2314 PSECURITY_DESCRIPTOR pDesc; /* Must be freed with LocalFree */ |
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2315 /* these need not be freed, they point into pDesc */ |
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2316 PSID psidOwner; |
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2317 PSID psidGroup; |
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2318 PACL pDacl; |
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2319 PACL pSacl; |
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2320 /* end of insides of descriptor */ |
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2321 DWORD error; |
|
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2322 DWORD attributes; |
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2323 HANDLE tokenHandle; |
|
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2324 GENERIC_MAPPING genericMapping; |
|
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2325 DWORD accessMask; |
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2326 PRIVILEGE_SET PrivilegeSet; |
| 5198 | 2327 DWORD dwPrivSetSize = sizeof ( PRIVILEGE_SET ); |
|
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2328 BOOL fAccessGranted = FALSE; |
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2329 DWORD dwAccessAllowed; |
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2330 Extbyte *fnameext; |
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2331 |
|
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2332 LOCAL_FILE_FORMAT_TO_TSTR (filename, fnameext); |
|
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2333 |
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2334 // First check for a normal file with the old-style readonly bit |
| 5198 | 2335 attributes = qxeGetFileAttributes (fnameext); |
| 2336 if (FILE_ATTRIBUTE_READONLY == | |
| 2337 (attributes & (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_READONLY))) | |
|
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2338 return 0; |
|
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2339 |
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2340 /* Win32 prototype lacks const. */ |
| 5198 | 2341 error = qxeGetNamedSecurityInfo (fnameext, SE_FILE_OBJECT, |
| 2342 DACL_SECURITY_INFORMATION| | |
| 2343 GROUP_SECURITY_INFORMATION| | |
| 2344 OWNER_SECURITY_INFORMATION, | |
| 2345 &psidOwner, &psidGroup, &pDacl, &pSacl, | |
| 2346 &pDesc); | |
| 2347 if (error != ERROR_SUCCESS) | |
| 2348 { // FAT? | |
| 2349 attributes = qxeGetFileAttributes (fnameext); | |
| 2350 return (attributes & FILE_ATTRIBUTE_DIRECTORY) || | |
| 2351 (0 == (attributes & FILE_ATTRIBUTE_READONLY)); | |
| 2352 } | |
|
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2353 |
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2354 genericMapping.GenericRead = FILE_GENERIC_READ; |
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2355 genericMapping.GenericWrite = FILE_GENERIC_WRITE; |
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2356 genericMapping.GenericExecute = FILE_GENERIC_EXECUTE; |
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2357 genericMapping.GenericAll = FILE_ALL_ACCESS; |
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2358 |
| 5198 | 2359 if (!ImpersonateSelf (SecurityDelegation)) |
| 2360 { | |
| 2361 return 0; | |
| 2362 } | |
| 2363 if (!OpenThreadToken (GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, | |
| 2364 &tokenHandle)) | |
| 2365 { | |
| 2366 return 0; | |
| 2367 } | |
|
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2368 |
|
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2369 accessMask = GENERIC_WRITE; |
| 5198 | 2370 MapGenericMask (&accessMask, &genericMapping); |
| 2371 | |
| 2372 if (!AccessCheck(pDesc, tokenHandle, accessMask, &genericMapping, | |
|
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2373 &PrivilegeSet, // receives privileges used in check |
|
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2374 &dwPrivSetSize, // size of PrivilegeSet buffer |
|
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2375 &dwAccessAllowed, // receives mask of allowed access rights |
|
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2376 &fAccessGranted)) |
|
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2377 { |
| 5198 | 2378 CloseHandle (tokenHandle); |
|
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2379 RevertToSelf(); |
| 5198 | 2380 LocalFree (pDesc); |
| 3781 | 2381 return 0; |
|
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2382 } |
| 5198 | 2383 CloseHandle (tokenHandle); |
|
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2384 RevertToSelf(); |
| 5198 | 2385 LocalFree (pDesc); |
|
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2386 return fAccessGranted == TRUE; |
|
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2387 #elif defined (HAVE_EACCESS) |
| 771 | 2388 return (qxe_eaccess (filename, W_OK) >= 0); |
| 428 | 2389 #else |
| 2390 /* Access isn't quite right because it uses the real uid | |
| 2391 and we really want to test with the effective uid. | |
| 2392 But Unix doesn't give us a right way to do it. | |
| 2393 Opening with O_WRONLY could work for an ordinary file, | |
| 2394 but would lose for directories. */ | |
| 771 | 2395 return (qxe_access (filename, W_OK) >= 0); |
|
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2396 #endif /* (not) defined (HAVE_EACCESS) */ |
| 428 | 2397 } |
| 2398 | |
| 2399 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /* | |
| 2400 Return t if file FILENAME exists. (This does not mean you can read it.) | |
| 2401 See also `file-readable-p' and `file-attributes'. | |
| 2402 */ | |
| 2403 (filename)) | |
| 2404 { | |
| 442 | 2405 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 2406 Lisp_Object abspath; |
| 2407 Lisp_Object handler; | |
| 2408 struct stat statbuf; | |
| 2409 struct gcpro gcpro1; | |
| 2410 | |
| 2411 CHECK_STRING (filename); | |
| 2412 abspath = Fexpand_file_name (filename, Qnil); | |
| 2413 | |
| 2414 /* If the file name has special constructs in it, | |
| 2415 call the corresponding file handler. */ | |
| 2416 GCPRO1 (abspath); | |
| 2417 handler = Ffind_file_name_handler (abspath, Qfile_exists_p); | |
| 2418 UNGCPRO; | |
| 2419 if (!NILP (handler)) | |
| 2420 return call2 (handler, Qfile_exists_p, abspath); | |
| 2421 | |
| 771 | 2422 return qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil; |
| 428 | 2423 } |
| 2424 | |
| 2425 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /* | |
| 2426 Return t if FILENAME can be executed by you. | |
| 2427 For a directory, this means you can access files in that directory. | |
| 2428 */ | |
| 2429 (filename)) | |
| 2430 | |
| 2431 { | |
| 442 | 2432 /* This function can GC. GC checked 07-11-2000 ben. */ |
| 428 | 2433 Lisp_Object abspath; |
| 2434 Lisp_Object handler; | |
| 2435 struct gcpro gcpro1; | |
| 2436 | |
| 2437 CHECK_STRING (filename); | |
| 2438 abspath = Fexpand_file_name (filename, Qnil); | |
| 2439 | |
| 2440 /* If the file name has special constructs in it, | |
| 2441 call the corresponding file handler. */ | |
| 2442 GCPRO1 (abspath); | |
| 2443 handler = Ffind_file_name_handler (abspath, Qfile_executable_p); | |
| 2444 UNGCPRO; | |
| 2445 if (!NILP (handler)) | |
| 2446 return call2 (handler, Qfile_executable_p, abspath); | |
| 2447 | |
| 771 | 2448 return check_executable (abspath) ? Qt : Qnil; |
| 428 | 2449 } |
| 2450 | |
| 2451 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /* | |
| 2452 Return t if file FILENAME exists and you can read it. | |
| 2453 See also `file-exists-p' and `file-attributes'. | |
| 2454 */ | |
| 2455 (filename)) | |
| 2456 { | |
| 2457 /* This function can GC */ | |
| 2458 Lisp_Object abspath = Qnil; | |
| 2459 Lisp_Object handler; | |
| 2460 struct gcpro gcpro1; | |
| 2461 GCPRO1 (abspath); | |
| 2462 | |
| 2463 CHECK_STRING (filename); | |
| 2464 abspath = Fexpand_file_name (filename, Qnil); | |
| 2465 | |
| 2466 /* If the file name has special constructs in it, | |
| 2467 call the corresponding file handler. */ | |
| 2468 handler = Ffind_file_name_handler (abspath, Qfile_readable_p); | |
| 2469 if (!NILP (handler)) | |
| 2470 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath)); | |
| 2471 | |
| 2526 | 2472 #if defined (WIN32_FILENAMES) |
| 428 | 2473 /* Under MS-DOS and Windows, open does not work for directories. */ |
| 2474 UNGCPRO; | |
| 771 | 2475 if (qxe_access (XSTRING_DATA (abspath), 0) == 0) |
| 428 | 2476 return Qt; |
| 2477 else | |
| 2478 return Qnil; | |
| 657 | 2479 #else /* not WIN32_FILENAMES */ |
| 428 | 2480 { |
| 771 | 2481 int desc = qxe_interruptible_open (XSTRING_DATA (abspath), |
| 2482 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 2483 UNGCPRO; |
| 2484 if (desc < 0) | |
| 2485 return Qnil; | |
| 771 | 2486 retry_close (desc); |
| 428 | 2487 return Qt; |
| 2488 } | |
| 657 | 2489 #endif /* not WIN32_FILENAMES */ |
| 428 | 2490 } |
| 2491 | |
| 2492 /* Having this before file-symlink-p mysteriously caused it to be forgotten | |
| 2493 on the RT/PC. */ | |
| 2494 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /* | |
| 2495 Return t if file FILENAME can be written or created by you. | |
| 2496 */ | |
| 2497 (filename)) | |
| 2498 { | |
| 2499 /* This function can GC. GC checked 1997.04.10. */ | |
| 2500 Lisp_Object abspath, dir; | |
| 2501 Lisp_Object handler; | |
| 2502 struct stat statbuf; | |
| 2503 struct gcpro gcpro1; | |
| 2504 | |
| 2505 CHECK_STRING (filename); | |
| 2506 abspath = Fexpand_file_name (filename, Qnil); | |
| 2507 | |
| 2508 /* If the file name has special constructs in it, | |
| 2509 call the corresponding file handler. */ | |
| 2510 GCPRO1 (abspath); | |
| 2511 handler = Ffind_file_name_handler (abspath, Qfile_writable_p); | |
| 2512 UNGCPRO; | |
| 2513 if (!NILP (handler)) | |
| 2514 return call2 (handler, Qfile_writable_p, abspath); | |
| 2515 | |
| 771 | 2516 if (qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0) |
| 2517 return (check_writable (XSTRING_DATA (abspath)) | |
| 428 | 2518 ? Qt : Qnil); |
| 2519 | |
| 2520 | |
| 2521 GCPRO1 (abspath); | |
| 2522 dir = Ffile_name_directory (abspath); | |
| 2523 UNGCPRO; | |
| 867 | 2524 return (check_writable (!NILP (dir) ? XSTRING_DATA (dir) : (Ibyte *) "") |
| 428 | 2525 ? Qt : Qnil); |
| 2526 } | |
| 2527 | |
| 2528 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /* | |
| 2529 Return non-nil if file FILENAME is the name of a symbolic link. | |
| 2530 The value is the name of the file to which it is linked. | |
| 2531 Otherwise returns nil. | |
| 2532 */ | |
| 2533 (filename)) | |
| 2534 { | |
| 2535 /* This function can GC. GC checked 1997.04.10. */ | |
| 442 | 2536 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 771 | 2537 #ifdef HAVE_READLINK |
| 867 | 2538 Ibyte *buf; |
| 428 | 2539 int bufsize; |
| 2540 int valsize; | |
| 2541 Lisp_Object val; | |
| 442 | 2542 #endif |
| 428 | 2543 Lisp_Object handler; |
| 2544 struct gcpro gcpro1; | |
| 2545 | |
| 2546 CHECK_STRING (filename); | |
| 2547 filename = Fexpand_file_name (filename, Qnil); | |
| 2548 | |
| 2549 /* If the file name has special constructs in it, | |
| 2550 call the corresponding file handler. */ | |
| 2551 GCPRO1 (filename); | |
| 2552 handler = Ffind_file_name_handler (filename, Qfile_symlink_p); | |
| 2553 UNGCPRO; | |
| 2554 if (!NILP (handler)) | |
| 2555 return call2 (handler, Qfile_symlink_p, filename); | |
| 2556 | |
| 771 | 2557 #ifdef HAVE_READLINK |
| 428 | 2558 bufsize = 100; |
| 2559 while (1) | |
| 2560 { | |
| 867 | 2561 buf = xnew_array_and_zero (Ibyte, bufsize); |
| 771 | 2562 valsize = qxe_readlink (XSTRING_DATA (filename), |
| 2563 buf, bufsize); | |
| 428 | 2564 if (valsize < bufsize) break; |
| 2565 /* Buffer was not long enough */ | |
|
4976
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Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
2566 xfree (buf); |
| 428 | 2567 bufsize *= 2; |
| 2568 } | |
| 2569 if (valsize == -1) | |
| 2570 { | |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
2571 xfree (buf); |
| 428 | 2572 return Qnil; |
| 2573 } | |
| 771 | 2574 val = make_string (buf, valsize); |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
2575 xfree (buf); |
| 428 | 2576 return val; |
| 2526 | 2577 #elif defined (WIN32_NATIVE) |
| 2578 if (mswindows_shortcuts_are_symlinks) | |
| 2579 { | |
| 2580 /* We want to resolve the directory component and leave the rest | |
| 2581 alone. */ | |
| 2582 Ibyte *path = XSTRING_DATA (filename); | |
| 2583 Ibyte *dirend = | |
| 2584 find_end_of_directory_component (path, XSTRING_LENGTH (filename)); | |
| 2585 Ibyte *fname; | |
| 2586 DECLARE_EISTRING (dir); | |
| 2587 | |
| 2588 if (dirend != path) | |
| 2589 { | |
| 2590 Ibyte *resdir; | |
| 2591 DECLARE_EISTRING (resname); | |
| 2592 | |
| 2593 eicpy_raw (dir, path, dirend - path); | |
| 2594 PATHNAME_RESOLVE_LINKS (eidata (dir), resdir); | |
| 2595 eicpy_rawz (resname, resdir); | |
| 2596 eicat_rawz (resname, dirend); | |
| 2597 path = eidata (resname); | |
| 2598 } | |
| 2599 | |
| 2600 fname = mswindows_read_link (path); | |
| 2601 if (!fname) | |
| 2602 return Qnil; | |
| 2603 { | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
2604 Lisp_Object val = build_istring (fname); |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
2605 xfree (fname); |
| 2526 | 2606 return val; |
| 2607 } | |
| 2608 } | |
| 428 | 2609 return Qnil; |
| 2526 | 2610 #else |
| 2611 return Qnil; | |
| 2612 #endif | |
| 428 | 2613 } |
| 2614 | |
| 2615 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /* | |
| 2616 Return t if file FILENAME is the name of a directory as a file. | |
| 2617 A directory name spec may be given instead; then the value is t | |
| 2618 if the directory so specified exists and really is a directory. | |
| 2619 */ | |
| 2620 (filename)) | |
| 2621 { | |
| 2622 /* This function can GC. GC checked 1997.04.10. */ | |
| 2623 Lisp_Object abspath; | |
| 2624 struct stat st; | |
| 2625 Lisp_Object handler; | |
| 2626 struct gcpro gcpro1; | |
| 2627 | |
| 2628 GCPRO1 (current_buffer->directory); | |
| 2629 abspath = expand_and_dir_to_file (filename, | |
| 2630 current_buffer->directory); | |
| 2631 UNGCPRO; | |
| 2632 | |
| 2633 /* If the file name has special constructs in it, | |
| 2634 call the corresponding file handler. */ | |
| 2635 GCPRO1 (abspath); | |
| 2636 handler = Ffind_file_name_handler (abspath, Qfile_directory_p); | |
| 2637 UNGCPRO; | |
| 2638 if (!NILP (handler)) | |
| 2639 return call2 (handler, Qfile_directory_p, abspath); | |
| 2640 | |
| 771 | 2641 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2642 return Qnil; |
| 2643 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
| 2644 } | |
| 2645 | |
| 2646 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /* | |
| 2647 Return t if file FILENAME is the name of a directory as a file, | |
| 2648 and files in that directory can be opened by you. In order to use a | |
| 2649 directory as a buffer's current directory, this predicate must return true. | |
| 2650 A directory name spec may be given instead; then the value is t | |
| 2651 if the directory so specified exists and really is a readable and | |
| 2652 searchable directory. | |
| 2653 */ | |
| 2654 (filename)) | |
| 2655 { | |
| 2656 /* This function can GC. GC checked 1997.04.10. */ | |
| 2657 Lisp_Object handler; | |
| 2658 | |
| 2659 /* If the file name has special constructs in it, | |
| 2660 call the corresponding file handler. */ | |
| 2661 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); | |
| 2662 if (!NILP (handler)) | |
| 2663 return call2 (handler, Qfile_accessible_directory_p, | |
| 2664 filename); | |
| 2665 | |
| 2526 | 2666 #if !defined (WIN32_NATIVE) |
| 428 | 2667 if (NILP (Ffile_directory_p (filename))) |
| 2668 return (Qnil); | |
| 2669 else | |
| 2670 return Ffile_executable_p (filename); | |
| 2671 #else | |
| 2672 { | |
| 2673 int tem; | |
| 2674 struct gcpro gcpro1; | |
| 2675 /* It's an unlikely combination, but yes we really do need to gcpro: | |
| 2676 Suppose that file-accessible-directory-p has no handler, but | |
| 2677 file-directory-p does have a handler; this handler causes a GC which | |
| 2678 relocates the string in `filename'; and finally file-directory-p | |
| 2679 returns non-nil. Then we would end up passing a garbaged string | |
| 2680 to file-executable-p. */ | |
| 2681 GCPRO1 (filename); | |
| 2682 tem = (NILP (Ffile_directory_p (filename)) | |
| 2683 || NILP (Ffile_executable_p (filename))); | |
| 2684 UNGCPRO; | |
| 2685 return tem ? Qnil : Qt; | |
| 2686 } | |
| 442 | 2687 #endif /* !defined(WIN32_NATIVE) */ |
| 428 | 2688 } |
| 2689 | |
| 2690 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /* | |
| 2691 Return t if file FILENAME is the name of a regular file. | |
| 2692 This is the sort of file that holds an ordinary stream of data bytes. | |
| 2693 */ | |
| 2694 (filename)) | |
| 2695 { | |
| 2696 /* This function can GC. GC checked 1997.04.10. */ | |
| 2697 Lisp_Object abspath; | |
| 2698 struct stat st; | |
| 2699 Lisp_Object handler; | |
| 2700 struct gcpro gcpro1; | |
| 2701 | |
| 2702 GCPRO1 (current_buffer->directory); | |
| 2703 abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
| 2704 UNGCPRO; | |
| 2705 | |
| 2706 /* If the file name has special constructs in it, | |
| 2707 call the corresponding file handler. */ | |
| 2708 GCPRO1 (abspath); | |
| 2709 handler = Ffind_file_name_handler (abspath, Qfile_regular_p); | |
| 2710 UNGCPRO; | |
| 2711 if (!NILP (handler)) | |
| 2712 return call2 (handler, Qfile_regular_p, abspath); | |
| 2713 | |
| 771 | 2714 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2715 return Qnil; |
| 2716 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
| 2717 } | |
| 2718 | |
| 2719 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /* | |
| 444 | 2720 Return mode bits of file named FILENAME, as an integer. |
| 428 | 2721 */ |
| 2722 (filename)) | |
| 2723 { | |
| 2724 /* This function can GC. GC checked 1997.04.10. */ | |
| 2725 Lisp_Object abspath; | |
| 2726 struct stat st; | |
| 2727 Lisp_Object handler; | |
| 2728 struct gcpro gcpro1; | |
| 2729 | |
| 2730 GCPRO1 (current_buffer->directory); | |
| 2731 abspath = expand_and_dir_to_file (filename, | |
| 2732 current_buffer->directory); | |
| 2733 UNGCPRO; | |
| 2734 | |
| 2735 /* If the file name has special constructs in it, | |
| 2736 call the corresponding file handler. */ | |
| 2737 GCPRO1 (abspath); | |
| 2738 handler = Ffind_file_name_handler (abspath, Qfile_modes); | |
| 2739 UNGCPRO; | |
| 2740 if (!NILP (handler)) | |
| 2741 return call2 (handler, Qfile_modes, abspath); | |
| 2742 | |
| 771 | 2743 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2744 return Qnil; |
| 2745 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */ | |
| 2746 #if 0 | |
| 442 | 2747 #ifdef WIN32_NATIVE |
| 771 | 2748 if (check_executable (abspath)) |
| 428 | 2749 st.st_mode |= S_IEXEC; |
| 442 | 2750 #endif /* WIN32_NATIVE */ |
| 428 | 2751 #endif /* 0 */ |
| 2752 | |
| 2753 return make_int (st.st_mode & 07777); | |
| 2754 } | |
| 2755 | |
| 2756 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /* | |
| 444 | 2757 Set mode bits of file named FILENAME to MODE (an integer). |
| 428 | 2758 Only the 12 low bits of MODE are used. |
| 2759 */ | |
| 2760 (filename, mode)) | |
| 2761 { | |
| 2762 /* This function can GC. GC checked 1997.04.10. */ | |
| 2763 Lisp_Object abspath; | |
| 2764 Lisp_Object handler; | |
| 2765 struct gcpro gcpro1; | |
| 2766 | |
| 2767 GCPRO1 (current_buffer->directory); | |
| 2768 abspath = Fexpand_file_name (filename, current_buffer->directory); | |
| 2769 UNGCPRO; | |
| 2770 | |
| 2771 CHECK_INT (mode); | |
| 2772 | |
| 2773 /* If the file name has special constructs in it, | |
| 2774 call the corresponding file handler. */ | |
| 2775 GCPRO1 (abspath); | |
| 2776 handler = Ffind_file_name_handler (abspath, Qset_file_modes); | |
| 2777 UNGCPRO; | |
| 2778 if (!NILP (handler)) | |
| 2779 return call3 (handler, Qset_file_modes, abspath, mode); | |
| 2780 | |
| 771 | 2781 if (qxe_chmod (XSTRING_DATA (abspath), XINT (mode)) < 0) |
| 563 | 2782 report_file_error ("Doing chmod", abspath); |
| 428 | 2783 |
| 2784 return Qnil; | |
| 2785 } | |
| 2786 | |
| 2787 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /* | |
| 2788 Set the file permission bits for newly created files. | |
| 444 | 2789 The argument MODE should be an integer; if a bit in MODE is 1, |
| 2790 subsequently created files will not have the permission corresponding | |
| 2791 to that bit enabled. Only the low 9 bits are used. | |
| 428 | 2792 This setting is inherited by subprocesses. |
| 2793 */ | |
| 2794 (mode)) | |
| 2795 { | |
| 2796 CHECK_INT (mode); | |
| 2797 | |
| 2798 umask ((~ XINT (mode)) & 0777); | |
| 2799 | |
| 2800 return Qnil; | |
| 2801 } | |
| 2802 | |
| 2803 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /* | |
| 2804 Return the default file protection for created files. | |
| 2805 The umask value determines which permissions are enabled in newly | |
| 2806 created files. If a permission's bit in the umask is 1, subsequently | |
| 2807 created files will not have that permission enabled. | |
| 2808 */ | |
| 2809 ()) | |
| 2810 { | |
| 2811 int mode; | |
| 2812 | |
| 2813 mode = umask (0); | |
| 2814 umask (mode); | |
| 2815 | |
| 2816 return make_int ((~ mode) & 0777); | |
| 2817 } | |
| 2818 | |
| 2819 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /* | |
| 2820 Tell Unix to finish all pending disk updates. | |
| 2821 */ | |
| 2822 ()) | |
| 2823 { | |
| 442 | 2824 #ifndef WIN32_NATIVE |
| 428 | 2825 sync (); |
| 2826 #endif | |
| 2827 return Qnil; | |
| 2828 } | |
| 2829 | |
| 2830 | |
| 2831 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /* | |
| 2832 Return t if file FILE1 is newer than file FILE2. | |
| 2833 If FILE1 does not exist, the answer is nil; | |
| 2834 otherwise, if FILE2 does not exist, the answer is t. | |
| 2835 */ | |
| 2836 (file1, file2)) | |
| 2837 { | |
| 2838 /* This function can GC. GC checked 1997.04.10. */ | |
| 2839 Lisp_Object abspath1, abspath2; | |
| 2840 struct stat st; | |
| 2841 int mtime1; | |
| 2842 Lisp_Object handler; | |
| 2843 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2844 | |
| 2845 CHECK_STRING (file1); | |
| 2846 CHECK_STRING (file2); | |
| 2847 | |
| 2848 abspath1 = Qnil; | |
| 2849 abspath2 = Qnil; | |
| 2850 | |
| 2851 GCPRO3 (abspath1, abspath2, current_buffer->directory); | |
| 2852 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
| 2853 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
| 2854 | |
| 2855 /* If the file name has special constructs in it, | |
| 2856 call the corresponding file handler. */ | |
| 2857 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p); | |
| 2858 if (NILP (handler)) | |
| 2859 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p); | |
| 2860 UNGCPRO; | |
| 2861 if (!NILP (handler)) | |
| 2862 return call3 (handler, Qfile_newer_than_file_p, abspath1, | |
| 2863 abspath2); | |
| 2864 | |
| 771 | 2865 if (qxe_stat (XSTRING_DATA (abspath1), &st) < 0) |
| 428 | 2866 return Qnil; |
| 2867 | |
| 2868 mtime1 = st.st_mtime; | |
| 2869 | |
| 771 | 2870 if (qxe_stat (XSTRING_DATA (abspath2), &st) < 0) |
| 428 | 2871 return Qt; |
| 2872 | |
| 2873 return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
| 2874 } | |
| 2875 | |
| 2876 | |
| 2877 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */ | |
| 2878 /* #define READ_BUF_SIZE (2 << 16) */ | |
| 2879 #define READ_BUF_SIZE (1 << 15) | |
| 2880 | |
| 2881 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal, | |
| 2882 1, 7, 0, /* | |
| 2883 Insert contents of file FILENAME after point; no coding-system frobbing. | |
| 2884 This function is identical to `insert-file-contents' except for the | |
| 771 | 2885 handling of the CODESYS and USED-CODESYS arguments. |
| 2886 | |
| 2887 The file is decoded according to CODESYS; if omitted, no conversion | |
| 2888 happens. If USED-CODESYS is non-nil, it should be a symbol, and the actual | |
| 2889 coding system that was used for the decoding is stored into it. It will in | |
| 2890 general be different from CODESYS if CODESYS specifies automatic encoding | |
| 2891 detection or end-of-line detection. | |
| 428 | 2892 |
| 444 | 2893 Currently START and END refer to byte positions (as opposed to character |
| 771 | 2894 positions), even in Mule and under MS Windows. (Fixing this, particularly |
| 2895 under Mule, is very difficult.) | |
| 428 | 2896 */ |
| 444 | 2897 (filename, visit, start, end, replace, codesys, used_codesys)) |
| 428 | 2898 { |
| 2899 /* This function can call lisp */ | |
| 2900 struct stat st; | |
| 2901 int fd; | |
| 2902 int saverrno = 0; | |
| 2903 Charcount inserted = 0; | |
| 2904 int speccount; | |
| 3841 | 2905 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3814 | 2906 Lisp_Object val; |
| 428 | 2907 int total; |
| 867 | 2908 Ibyte read_buf[READ_BUF_SIZE]; |
| 428 | 2909 int mc_count; |
| 2910 struct buffer *buf = current_buffer; | |
| 2911 Lisp_Object curbuf; | |
| 2912 int not_regular = 0; | |
| 771 | 2913 int do_speedy_insert = |
| 2914 coding_system_is_binary (Fget_coding_system (codesys)); | |
| 428 | 2915 |
| 2916 if (buf->base_buffer && ! NILP (visit)) | |
| 563 | 2917 invalid_operation ("Cannot do file visiting in an indirect buffer", Qunbound); |
| 428 | 2918 |
| 2919 /* No need to call Fbarf_if_buffer_read_only() here. | |
| 2920 That's called in begin_multiple_change() or wherever. */ | |
| 2921 | |
| 2922 val = Qnil; | |
| 2923 | |
| 2924 /* #### dmoore - should probably check in various places to see if | |
| 2925 curbuf was killed and if so signal an error? */ | |
| 2926 | |
| 793 | 2927 curbuf = wrap_buffer (buf); |
| 428 | 2928 |
| 3814 | 2929 GCPRO4 (filename, val, visit, curbuf); |
| 428 | 2930 |
| 2931 mc_count = (NILP (replace)) ? | |
| 2932 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) : | |
| 2933 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf)); | |
| 2934 | |
| 2935 speccount = specpdl_depth (); /* begin_multiple_change also adds | |
| 2936 an unwind_protect */ | |
| 2937 | |
| 2938 filename = Fexpand_file_name (filename, Qnil); | |
| 2939 | |
| 2940 if (!NILP (used_codesys)) | |
| 2941 CHECK_SYMBOL (used_codesys); | |
| 2942 | |
| 444 | 2943 if ( (!NILP (start) || !NILP (end)) && !NILP (visit) ) |
| 563 | 2944 invalid_operation ("Attempt to visit less than an entire file", Qunbound); |
| 428 | 2945 |
| 2946 fd = -1; | |
| 2947 | |
| 771 | 2948 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2949 { |
| 2950 badopen: | |
| 2951 if (NILP (visit)) | |
| 563 | 2952 report_file_error ("Opening input file", filename); |
| 428 | 2953 st.st_mtime = -1; |
| 2954 goto notfound; | |
| 2955 } | |
| 2956 | |
| 2957 #ifdef S_IFREG | |
| 2958 /* Signal an error if we are accessing a non-regular file, with | |
| 444 | 2959 REPLACE, START or END being non-nil. */ |
| 428 | 2960 if (!S_ISREG (st.st_mode)) |
| 2961 { | |
| 2962 not_regular = 1; | |
| 2963 | |
| 2964 if (!NILP (visit)) | |
| 2965 goto notfound; | |
| 2966 | |
| 444 | 2967 if (!NILP (replace) || !NILP (start) || !NILP (end)) |
| 428 | 2968 { |
| 2969 end_multiple_change (buf, mc_count); | |
| 2970 | |
| 444 | 2971 RETURN_UNGCPRO |
| 2972 (Fsignal (Qfile_error, | |
| 5198 | 2973 list2 (build_msg_string ("not a regular file"), |
| 444 | 2974 filename))); |
| 428 | 2975 } |
| 2976 } | |
| 2977 #endif /* S_IFREG */ | |
| 2978 | |
| 444 | 2979 if (!NILP (start)) |
| 2980 CHECK_INT (start); | |
| 428 | 2981 else |
| 444 | 2982 start = Qzero; |
| 428 | 2983 |
| 2984 if (!NILP (end)) | |
| 2985 CHECK_INT (end); | |
| 2986 | |
| 2987 if (fd < 0) | |
| 2988 { | |
| 771 | 2989 if ((fd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 2990 O_RDONLY | OPEN_BINARY, 0)) < 0) | |
| 428 | 2991 goto badopen; |
| 2992 } | |
| 2993 | |
| 2994 /* Replacement should preserve point as it preserves markers. */ | |
| 2995 if (!NILP (replace)) | |
| 2996 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil)); | |
| 2997 | |
| 2998 record_unwind_protect (close_file_unwind, make_int (fd)); | |
| 2999 | |
| 3000 /* Supposedly happens on VMS. */ | |
| 3001 if (st.st_size < 0) | |
| 563 | 3002 signal_error (Qfile_error, "File size is negative", Qunbound); |
| 428 | 3003 |
| 3004 if (NILP (end)) | |
| 3005 { | |
| 3006 if (!not_regular) | |
| 3007 { | |
| 3008 end = make_int (st.st_size); | |
| 3009 if (XINT (end) != st.st_size) | |
| 563 | 3010 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3011 } |
| 3012 } | |
| 3013 | |
| 3014 /* If requested, replace the accessible part of the buffer | |
| 3015 with the file contents. Avoid replacing text at the | |
| 3016 beginning or end of the buffer that matches the file contents; | |
| 771 | 3017 that preserves markers pointing to the unchanged parts. */ |
| 3018 /* The replace-mode code is currently implemented by comparing the | |
| 3019 file on disk with the contents in the buffer, character by character. | |
| 3020 That works only if the characters on disk are exactly what will go into | |
| 3021 the buffer -- i.e. `binary' conversion. | |
| 3022 | |
| 3023 FSF tries to implement this in all situations, even the non-binary | |
| 3024 conversion, by (in that case) loading the whole converted file into a | |
| 3025 separate memory area, then doing the comparison. I really don't see | |
| 3026 the point of this, and it will fail spectacularly if the file is many | |
| 3027 megabytes in size. To try to get around this, we could certainly read | |
| 3028 from the beginning and decode as necessary before comparing, but doing | |
| 3029 the same at the end gets very difficult because of the possibility of | |
| 3030 modal coding systems -- trying to decode data from any point forward | |
| 3031 without decoding previous data might always give you different results | |
| 3032 from starting at the beginning. We could try further tricks like | |
| 3033 keeping track of which coding systems are non-modal and providing some | |
| 3034 extra method for such coding systems to be given a chunk of data that | |
| 3035 came from a specified location in a specified file and ask the coding | |
| 3036 systems to return a "sync point" from which the data can be read | |
| 3037 forward and have results guaranteed to be the same as reading from the | |
| 3038 beginning to that point, but I really don't think it's worth it. If | |
| 3039 we implemented the FSF "brute-force" method, we would have to put a | |
| 3040 reasonable maximum file size on the files. Is any of this worth it? | |
| 3041 --ben | |
| 3042 | |
| 3638 | 3043 |
| 3044 It's probably not worth it, and despite what you might take from the | |
| 3045 above, we don't do it currently; that is, for non-"binary" coding | |
| 3046 systems, we don't try to implement replace-mode at all. See the | |
| 3047 do_speedy_insert variable above. The upside of this is that our API | |
| 3048 is consistent and not buggy. -- Aidan Kehoe, Fri Oct 27 21:02:30 CEST | |
| 3049 2006 | |
| 771 | 3050 */ |
| 3051 | |
| 428 | 3052 if (!NILP (replace)) |
| 3053 { | |
| 771 | 3054 if (!do_speedy_insert) |
| 3055 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf), | |
| 3056 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3057 else | |
| 428 | 3058 { |
|
5000
44d7bde26046
fix compile errors, fix revert-buffer bug on binary/Latin 1 files, Mule-ize some files
Ben Wing <ben@xemacs.org>
parents:
4982
diff
changeset
|
3059 Rawbyte buffer[1 << 14]; |
| 771 | 3060 Charbpos same_at_start = BUF_BEGV (buf); |
| 3061 Charbpos same_at_end = BUF_ZV (buf); | |
| 3062 int overlap; | |
| 3063 | |
| 3064 /* Count how many chars at the start of the file | |
| 3065 match the text at the beginning of the buffer. */ | |
| 3066 while (1) | |
| 3067 { | |
| 3068 int nread; | |
| 3069 Charbpos charbpos; | |
| 3070 nread = read_allowing_quit (fd, buffer, sizeof (buffer)); | |
| 3071 if (nread < 0) | |
| 3072 report_file_error ("Reading", filename); | |
| 3073 else if (nread == 0) | |
| 3074 break; | |
| 3075 charbpos = 0; | |
| 3076 while (charbpos < nread && same_at_start < BUF_ZV (buf) | |
| 814 | 3077 && BUF_FETCH_CHAR (buf, same_at_start) == |
| 3078 buffer[charbpos]) | |
| 771 | 3079 same_at_start++, charbpos++; |
| 3080 /* If we found a discrepancy, stop the scan. | |
| 3081 Otherwise loop around and scan the next bufferful. */ | |
| 3082 if (charbpos != nread) | |
| 3083 break; | |
| 3084 } | |
| 3085 /* If the file matches the buffer completely, | |
| 3086 there's no need to replace anything. */ | |
| 3087 if (same_at_start - BUF_BEGV (buf) == st.st_size) | |
| 3088 { | |
| 3089 retry_close (fd); | |
| 3090 unbind_to (speccount); | |
| 3091 /* Truncate the buffer to the size of the file. */ | |
| 3092 buffer_delete_range (buf, same_at_start, same_at_end, | |
| 3093 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3094 goto handled; | |
| 3095 } | |
| 3096 /* Count how many chars at the end of the file | |
| 3097 match the text at the end of the buffer. */ | |
| 3098 while (1) | |
| 3099 { | |
| 3100 int total_read, nread; | |
| 814 | 3101 Charcount charbpos, curpos, trial; |
| 771 | 3102 |
| 3103 /* At what file position are we now scanning? */ | |
| 3104 curpos = st.st_size - (BUF_ZV (buf) - same_at_end); | |
| 3105 /* If the entire file matches the buffer tail, stop the scan. */ | |
| 3106 if (curpos == 0) | |
| 3107 break; | |
| 3108 /* How much can we scan in the next step? */ | |
| 3109 trial = min (curpos, (Charbpos) sizeof (buffer)); | |
| 3110 if (lseek (fd, curpos - trial, 0) < 0) | |
| 3111 report_file_error ("Setting file position", filename); | |
| 3112 | |
| 3113 total_read = 0; | |
| 3114 while (total_read < trial) | |
| 3115 { | |
| 3116 nread = read_allowing_quit (fd, buffer + total_read, | |
| 3117 trial - total_read); | |
| 3118 if (nread <= 0) | |
| 3119 report_file_error ("IO error reading file", filename); | |
| 3120 total_read += nread; | |
| 3121 } | |
| 3122 /* Scan this bufferful from the end, comparing with | |
| 3123 the Emacs buffer. */ | |
| 3124 charbpos = total_read; | |
| 3125 /* Compare with same_at_start to avoid counting some buffer text | |
| 3126 as matching both at the file's beginning and at the end. */ | |
| 3127 while (charbpos > 0 && same_at_end > same_at_start | |
| 3128 && BUF_FETCH_CHAR (buf, same_at_end - 1) == | |
| 3129 buffer[charbpos - 1]) | |
| 3130 same_at_end--, charbpos--; | |
| 3131 /* If we found a discrepancy, stop the scan. | |
| 3132 Otherwise loop around and scan the preceding bufferful. */ | |
| 3133 if (charbpos != 0) | |
| 3134 break; | |
| 3135 /* If display current starts at beginning of line, | |
| 3136 keep it that way. */ | |
| 3137 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf) | |
| 3138 XWINDOW (Fselected_window (Qnil))->start_at_line_beg = | |
| 3139 !NILP (Fbolp (wrap_buffer (buf))); | |
| 3140 } | |
| 3141 | |
| 3142 /* Don't try to reuse the same piece of text twice. */ | |
| 3143 overlap = same_at_start - BUF_BEGV (buf) - | |
| 3144 (same_at_end + st.st_size - BUF_ZV (buf)); | |
| 3145 if (overlap > 0) | |
| 3146 same_at_end += overlap; | |
| 3147 | |
| 3148 /* Arrange to read only the nonmatching middle part of the file. */ | |
| 3149 start = make_int (same_at_start - BUF_BEGV (buf)); | |
| 3150 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end)); | |
| 3151 | |
| 428 | 3152 buffer_delete_range (buf, same_at_start, same_at_end, |
| 3153 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 771 | 3154 /* Insert from the file at the proper position. */ |
| 3155 BUF_SET_PT (buf, same_at_start); | |
| 428 | 3156 } |
| 3157 } | |
| 3158 | |
| 3159 if (!not_regular) | |
| 3160 { | |
| 444 | 3161 total = XINT (end) - XINT (start); |
| 428 | 3162 |
| 3163 /* Make sure point-max won't overflow after this insertion. */ | |
| 3164 if (total != XINT (make_int (total))) | |
| 563 | 3165 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3166 } |
| 3167 else | |
| 3168 /* For a special file, all we can do is guess. The value of -1 | |
| 3169 will make the stream functions read as much as possible. */ | |
| 3170 total = -1; | |
| 3171 | |
| 444 | 3172 if (XINT (start) != 0 |
| 428 | 3173 /* why was this here? asked jwz. The reason is that the replace-mode |
| 3174 connivings above will normally put the file pointer other than | |
| 3175 where it should be. */ | |
| 771 | 3176 || (!NILP (replace) && do_speedy_insert)) |
| 428 | 3177 { |
| 444 | 3178 if (lseek (fd, XINT (start), 0) < 0) |
| 563 | 3179 report_file_error ("Setting file position", filename); |
| 428 | 3180 } |
| 3181 | |
| 3182 { | |
| 665 | 3183 Charbpos cur_point = BUF_PT (buf); |
| 428 | 3184 struct gcpro ngcpro1; |
| 3185 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total, | |
| 3186 LSTR_ALLOW_QUIT); | |
| 3187 | |
| 3188 NGCPRO1 (stream); | |
| 3189 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 771 | 3190 stream = make_coding_input_stream |
| 3191 (XLSTREAM (stream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 3192 CODING_DECODE, 0); |
| 428 | 3193 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); |
| 3194 | |
| 3195 record_unwind_protect (delete_stream_unwind, stream); | |
| 3196 | |
| 3197 /* No need to limit the amount of stuff we attempt to read. (It would | |
| 3198 be incorrect, anyway, when Mule is enabled.) Instead, the limiting | |
| 3199 occurs inside of the filedesc stream. */ | |
| 3200 while (1) | |
| 3201 { | |
| 665 | 3202 Bytecount this_len; |
| 428 | 3203 Charcount cc_inserted; |
| 3204 | |
| 3205 QUIT; | |
| 3206 this_len = Lstream_read (XLSTREAM (stream), read_buf, | |
| 3207 sizeof (read_buf)); | |
| 3208 | |
| 3209 if (this_len <= 0) | |
| 3210 { | |
| 3211 if (this_len < 0) | |
| 3212 saverrno = errno; | |
| 3213 break; | |
| 3214 } | |
| 3215 | |
| 3216 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf, | |
| 3217 this_len, | |
| 3218 !NILP (visit) | |
| 3219 ? INSDEL_NO_LOCKING : 0); | |
| 3220 inserted += cc_inserted; | |
| 3221 cur_point += cc_inserted; | |
| 3222 } | |
| 3223 if (!NILP (used_codesys)) | |
| 3224 { | |
| 3225 Fset (used_codesys, | |
| 771 | 3226 XCODING_SYSTEM_NAME |
| 3227 (coding_stream_detected_coding_system (XLSTREAM (stream)))); | |
| 428 | 3228 } |
| 3229 NUNGCPRO; | |
| 3230 } | |
| 3231 | |
| 3232 /* Close the file/stream */ | |
| 771 | 3233 unbind_to (speccount); |
| 428 | 3234 |
| 3235 if (saverrno != 0) | |
| 3236 { | |
| 563 | 3237 errno = saverrno; |
| 3238 report_file_error ("Reading", filename); | |
| 428 | 3239 } |
| 3240 | |
| 3241 notfound: | |
| 3242 handled: | |
| 3243 | |
| 3244 end_multiple_change (buf, mc_count); | |
| 3245 | |
| 3246 if (!NILP (visit)) | |
| 3247 { | |
| 3248 if (!EQ (buf->undo_list, Qt)) | |
| 3249 buf->undo_list = Qnil; | |
| 3814 | 3250 buf->modtime = st.st_mtime; |
| 3251 buf->filename = filename; | |
| 3252 /* XEmacs addition: */ | |
| 3253 /* This function used to be in C, ostensibly so that | |
| 3254 it could be called here. But that's just silly. | |
| 3255 There's no reason C code can't call out to Lisp | |
| 3256 code, and it's a lot cleaner this way. */ | |
| 3257 /* Note: compute-buffer-file-truename is called for | |
| 3258 side-effect! Its return value is intentionally | |
| 3259 ignored. */ | |
| 3260 if (!NILP (Ffboundp (Qcompute_buffer_file_truename))) | |
| 3261 call1 (Qcompute_buffer_file_truename, wrap_buffer (buf)); | |
| 428 | 3262 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf); |
| 3263 buf->auto_save_modified = BUF_MODIFF (buf); | |
| 3264 buf->saved_size = make_int (BUF_SIZE (buf)); | |
| 3265 #ifdef CLASH_DETECTION | |
| 3814 | 3266 if (!NILP (buf->file_truename)) |
| 3267 unlock_file (buf->file_truename); | |
| 3268 unlock_file (filename); | |
| 428 | 3269 #endif /* CLASH_DETECTION */ |
| 3270 if (not_regular) | |
| 3271 RETURN_UNGCPRO (Fsignal (Qfile_error, | |
| 771 | 3272 list2 (build_msg_string ("not a regular file"), |
| 428 | 3273 filename))); |
| 3274 | |
| 3275 /* If visiting nonexistent file, return nil. */ | |
| 3276 if (buf->modtime == -1) | |
| 3277 report_file_error ("Opening input file", | |
| 563 | 3278 filename); |
| 428 | 3279 } |
| 3280 | |
| 3281 /* Decode file format */ | |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3282 if (inserted > 0 && !UNBOUNDP (XSYMBOL_FUNCTION (Qformat_decode))) |
| 428 | 3283 { |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3284 Lisp_Object insval = call3 (Qformat_decode, Qnil, make_int (inserted), |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3285 visit); |
| 428 | 3286 CHECK_INT (insval); |
| 3287 inserted = XINT (insval); | |
| 3288 } | |
| 3289 | |
| 3290 if (inserted > 0) | |
| 3291 { | |
| 2367 | 3292 GC_EXTERNAL_LIST_LOOP_2 (p, Vafter_insert_file_functions) |
| 428 | 3293 { |
| 2367 | 3294 Lisp_Object insval = call1 (p, make_int (inserted)); |
| 428 | 3295 if (!NILP (insval)) |
| 3296 { | |
| 3297 CHECK_NATNUM (insval); | |
| 3298 inserted = XINT (insval); | |
| 3299 } | |
| 3300 } | |
| 2367 | 3301 END_GC_EXTERNAL_LIST_LOOP (p); |
| 428 | 3302 } |
| 3303 | |
| 3304 UNGCPRO; | |
| 3305 | |
| 3306 if (!NILP (val)) | |
| 3307 return (val); | |
| 3308 else | |
| 3309 return (list2 (filename, make_int (inserted))); | |
| 3310 } | |
| 3311 | |
| 3312 | |
| 3313 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3314 Lisp_Object *annot); | |
| 3315 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end); | |
| 3316 | |
| 3317 /* If build_annotations switched buffers, switch back to BUF. | |
| 3318 Kill the temporary buffer that was selected in the meantime. */ | |
| 3319 | |
| 3320 static Lisp_Object | |
| 3321 build_annotations_unwind (Lisp_Object buf) | |
| 3322 { | |
| 3323 Lisp_Object tembuf; | |
| 3324 | |
| 3325 if (XBUFFER (buf) == current_buffer) | |
| 3326 return Qnil; | |
| 3327 tembuf = Fcurrent_buffer (); | |
| 3328 Fset_buffer (buf); | |
| 3329 Fkill_buffer (tembuf); | |
| 3330 return Qnil; | |
| 3331 } | |
| 3332 | |
| 4266 | 3333 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 8, |
| 428 | 3334 "r\nFWrite region to file: ", /* |
| 3335 Write current region into specified file; no coding-system frobbing. | |
| 4266 | 3336 |
| 3337 This function is almost identical to `write-region'; see that function for | |
| 3338 documentation of the START, END, FILENAME, APPEND, VISIT, and LOCKNAME | |
| 3339 arguments. CODESYS specifies the encoding to be used for the file; if it is | |
| 3340 nil, no code conversion occurs. (With `write-region' the coding system is | |
| 3341 determined automatically if not specified.) | |
| 3342 | |
| 3343 MUSTBENEW specifies that a check for an existing file of the same name | |
| 3344 should be made. If it is 'excl, XEmacs will error on detecting such a file | |
| 3345 and never write it. If it is some other non-nil value, the user will be | |
| 3346 prompted to confirm the overwriting of an existing file. If it is nil, | |
| 3347 existing files are silently overwritten when file system permissions allow | |
| 3348 this. | |
| 764 | 3349 |
| 3350 As a special kludge to support auto-saving, when START is nil START and | |
| 3351 END are set to the beginning and end, respectively, of the buffer, | |
| 3352 regardless of any restrictions. Don't use this feature. It is documented | |
| 3353 here because write-region handler writers need to be aware of it. | |
| 4266 | 3354 |
| 428 | 3355 */ |
| 4266 | 3356 (start, end, filename, append, visit, lockname, codesys, |
| 3357 mustbenew)) | |
| 428 | 3358 { |
| 442 | 3359 /* This function can call lisp. GC checked 2000-07-28 ben */ |
| 428 | 3360 int desc; |
| 3361 int failure; | |
| 3362 int save_errno = 0; | |
| 3363 struct stat st; | |
| 442 | 3364 Lisp_Object fn = Qnil; |
| 428 | 3365 int speccount = specpdl_depth (); |
| 3366 int visiting_other = STRINGP (visit); | |
| 3367 int visiting = (EQ (visit, Qt) || visiting_other); | |
| 3368 int quietly = (!visiting && !NILP (visit)); | |
| 3369 Lisp_Object visit_file = Qnil; | |
| 3370 Lisp_Object annotations = Qnil; | |
| 3371 struct buffer *given_buffer; | |
| 665 | 3372 Charbpos start1, end1; |
| 442 | 3373 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3374 struct gcpro ngcpro1, ngcpro2; | |
| 793 | 3375 Lisp_Object curbuf = wrap_buffer (current_buffer); |
| 3376 | |
| 442 | 3377 |
| 3378 /* start, end, visit, and append are never modified in this fun | |
| 3379 so we don't protect them. */ | |
| 3380 GCPRO5 (visit_file, filename, codesys, lockname, annotations); | |
| 3381 NGCPRO2 (curbuf, fn); | |
| 3382 | |
| 3383 /* [[ dmoore - if Fexpand_file_name or handlers kill the buffer, | |
| 428 | 3384 we should signal an error rather than blissfully continuing |
| 3385 along. ARGH, this function is going to lose lose lose. We need | |
| 3386 to protect the current_buffer from being destroyed, but the | |
| 442 | 3387 multiple return points make this a pain in the butt. ]] we do |
| 3388 protect curbuf now. --ben */ | |
| 428 | 3389 |
| 771 | 3390 codesys = get_coding_system_for_text_file (codesys, 0); |
| 428 | 3391 |
| 3392 if (current_buffer->base_buffer && ! NILP (visit)) | |
| 442 | 3393 invalid_operation ("Cannot do file visiting in an indirect buffer", |
| 3394 curbuf); | |
| 428 | 3395 |
| 3396 if (!NILP (start) && !STRINGP (start)) | |
| 3397 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0); | |
| 3398 | |
| 3399 { | |
| 3400 Lisp_Object handler; | |
| 3401 | |
| 4266 | 3402 if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
| 3403 barf_or_query_if_file_exists (filename, "overwrite", 1, NULL); | |
| 3404 | |
| 428 | 3405 if (visiting_other) |
| 3406 visit_file = Fexpand_file_name (visit, Qnil); | |
| 3407 else | |
| 3408 visit_file = filename; | |
| 3409 filename = Fexpand_file_name (filename, Qnil); | |
| 3410 | |
| 3411 if (NILP (lockname)) | |
| 3412 lockname = visit_file; | |
| 3413 | |
| 442 | 3414 /* We used to UNGCPRO here. BAD! visit_file is used below after |
| 3415 more Lisp calling. */ | |
| 428 | 3416 /* If the file name has special constructs in it, |
| 3417 call the corresponding file handler. */ | |
| 3418 handler = Ffind_file_name_handler (filename, Qwrite_region); | |
| 3419 /* If FILENAME has no handler, see if VISIT has one. */ | |
| 3420 if (NILP (handler) && STRINGP (visit)) | |
| 3421 handler = Ffind_file_name_handler (visit, Qwrite_region); | |
| 3422 | |
| 3423 if (!NILP (handler)) | |
| 3424 { | |
| 3425 Lisp_Object val = call8 (handler, Qwrite_region, start, end, | |
| 3426 filename, append, visit, lockname, codesys); | |
| 3427 if (visiting) | |
| 3428 { | |
| 3429 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3430 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3431 current_buffer->filename = visit_file; | |
| 3432 MARK_MODELINE_CHANGED; | |
| 3433 } | |
| 442 | 3434 NUNGCPRO; |
| 3435 UNGCPRO; | |
| 428 | 3436 return val; |
| 3437 } | |
| 3438 } | |
| 3439 | |
| 3440 #ifdef CLASH_DETECTION | |
| 3441 if (!auto_saving) | |
| 442 | 3442 lock_file (lockname); |
| 428 | 3443 #endif /* CLASH_DETECTION */ |
| 3444 | |
| 3445 /* Special kludge to simplify auto-saving. */ | |
| 3446 if (NILP (start)) | |
| 3447 { | |
| 3448 start1 = BUF_BEG (current_buffer); | |
| 3449 end1 = BUF_Z (current_buffer); | |
| 3450 } | |
| 3451 | |
| 3452 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); | |
| 3453 | |
| 3454 given_buffer = current_buffer; | |
| 3455 annotations = build_annotations (start, end); | |
| 3456 if (current_buffer != given_buffer) | |
| 3457 { | |
| 3458 start1 = BUF_BEGV (current_buffer); | |
| 3459 end1 = BUF_ZV (current_buffer); | |
| 3460 } | |
| 3461 | |
| 3462 fn = filename; | |
| 3463 desc = -1; | |
| 3464 if (!NILP (append)) | |
| 3465 { | |
| 4266 | 3466 desc = qxe_open (XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY |
| 3467 | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), 0); | |
| 428 | 3468 } |
| 3469 if (desc < 0) | |
| 3470 { | |
| 771 | 3471 desc = qxe_open (XSTRING_DATA (fn), |
| 4266 | 3472 O_WRONLY | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC) |
| 3473 | O_CREAT | OPEN_BINARY, | |
| 771 | 3474 auto_saving ? auto_save_mode_bits : CREAT_MODE); |
| 428 | 3475 } |
| 3476 | |
| 3477 if (desc < 0) | |
| 3478 { | |
| 3479 #ifdef CLASH_DETECTION | |
| 3480 save_errno = errno; | |
| 3481 if (!auto_saving) unlock_file (lockname); | |
| 3482 errno = save_errno; | |
| 3483 #endif /* CLASH_DETECTION */ | |
| 563 | 3484 report_file_error ("Opening output file", filename); |
| 428 | 3485 } |
| 3486 | |
| 3487 { | |
| 3488 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil); | |
| 3489 Lisp_Object instream = Qnil, outstream = Qnil; | |
| 442 | 3490 struct gcpro nngcpro1, nngcpro2; |
| 3491 NNGCPRO2 (instream, outstream); | |
| 428 | 3492 |
| 3493 record_unwind_protect (close_file_unwind, desc_locative); | |
| 3494 | |
| 3495 if (!NILP (append)) | |
| 3496 { | |
| 3497 if (lseek (desc, 0, 2) < 0) | |
| 3498 { | |
| 3499 #ifdef CLASH_DETECTION | |
| 3500 if (!auto_saving) unlock_file (lockname); | |
| 3501 #endif /* CLASH_DETECTION */ | |
| 3502 report_file_error ("Lseek error", | |
| 563 | 3503 filename); |
| 428 | 3504 } |
| 3505 } | |
| 3506 | |
| 3507 failure = 0; | |
| 3508 | |
| 3509 /* Note: I tried increasing the buffering size, along with | |
| 3510 various other tricks, but nothing seemed to make much of | |
| 3511 a difference in the time it took to save a large file. | |
| 3512 (Actually that's not true. With a local disk, changing | |
| 3513 the buffer size doesn't seem to make much difference. | |
| 3514 With an NFS-mounted disk, it could make a lot of difference | |
| 3515 because you're affecting the number of network requests | |
| 3516 that need to be made, and there could be a large latency | |
| 3517 for each request. So I've increased the buffer size | |
| 3518 to 64K.) */ | |
| 3519 outstream = make_filedesc_output_stream (desc, 0, -1, 0); | |
| 3520 Lstream_set_buffering (XLSTREAM (outstream), | |
| 3521 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3522 outstream = | |
| 800 | 3523 make_coding_output_stream (XLSTREAM (outstream), codesys, |
| 3524 CODING_ENCODE, 0); | |
| 428 | 3525 Lstream_set_buffering (XLSTREAM (outstream), |
| 3526 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3527 if (STRINGP (start)) | |
| 3528 { | |
| 3529 instream = make_lisp_string_input_stream (start, 0, -1); | |
| 3530 start1 = 0; | |
| 3531 } | |
| 3532 else | |
| 3533 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1, | |
| 3534 LSTR_SELECTIVE | | |
| 3535 LSTR_IGNORE_ACCESSIBLE); | |
| 3536 failure = (0 > (a_write (outstream, instream, start1, | |
| 3537 &annotations))); | |
| 3538 save_errno = errno; | |
| 3539 /* Note that this doesn't close the desc since we created the | |
| 3540 stream without the LSTR_CLOSING flag, but it does | |
| 3541 flush out any buffered data. */ | |
| 3542 if (Lstream_close (XLSTREAM (outstream)) < 0) | |
| 3543 { | |
| 3544 failure = 1; | |
| 3545 save_errno = errno; | |
| 3546 } | |
| 3547 Lstream_close (XLSTREAM (instream)); | |
| 3548 | |
| 3549 #ifdef HAVE_FSYNC | |
| 3550 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). | |
| 3551 Disk full in NFS may be reported here. */ | |
| 3552 /* mib says that closing the file will try to write as fast as NFS can do | |
| 3553 it, and that means the fsync here is not crucial for autosave files. */ | |
|
4499
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
3554 if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0 |
| 428 | 3555 /* If fsync fails with EINTR, don't treat that as serious. */ |
| 3556 && errno != EINTR) | |
| 3557 { | |
| 3558 failure = 1; | |
| 3559 save_errno = errno; | |
| 3560 } | |
| 3561 #endif /* HAVE_FSYNC */ | |
| 3562 | |
| 440 | 3563 /* Spurious "file has changed on disk" warnings used to be seen on |
| 3564 systems where close() can change the modtime. This is known to | |
| 3565 happen on various NFS file systems, on Windows, and on Linux. | |
| 3566 Rather than handling this on a per-system basis, we | |
| 771 | 3567 unconditionally do the qxe_stat() after the retry_close(). */ |
| 428 | 3568 |
| 3569 /* NFS can report a write failure now. */ | |
| 771 | 3570 if (retry_close (desc) < 0) |
| 428 | 3571 { |
| 3572 failure = 1; | |
| 3573 save_errno = errno; | |
| 3574 } | |
| 3575 | |
| 3576 /* Discard the close unwind-protect. Execute the one for | |
| 3577 build_annotations (switches back to the original current buffer | |
| 3578 as necessary). */ | |
| 3579 XCAR (desc_locative) = Qnil; | |
| 771 | 3580 unbind_to (speccount); |
| 442 | 3581 |
| 3582 NNUNGCPRO; | |
| 428 | 3583 } |
| 3584 | |
| 771 | 3585 qxe_stat (XSTRING_DATA (fn), &st); |
| 428 | 3586 |
| 3587 #ifdef CLASH_DETECTION | |
| 3588 if (!auto_saving) | |
| 3589 unlock_file (lockname); | |
| 3590 #endif /* CLASH_DETECTION */ | |
| 3591 | |
| 3592 /* Do this before reporting IO error | |
| 3593 to avoid a "file has changed on disk" warning on | |
| 3594 next attempt to save. */ | |
| 3595 if (visiting) | |
| 3596 current_buffer->modtime = st.st_mtime; | |
| 3597 | |
| 3598 if (failure) | |
| 442 | 3599 { |
| 3600 errno = save_errno; | |
| 563 | 3601 report_file_error ("Writing file", fn); |
| 442 | 3602 } |
| 428 | 3603 |
| 3604 if (visiting) | |
| 3605 { | |
| 3606 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3607 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3608 current_buffer->filename = visit_file; | |
| 3609 MARK_MODELINE_CHANGED; | |
| 3610 } | |
| 3611 else if (quietly) | |
| 3612 { | |
| 442 | 3613 NUNGCPRO; |
| 3614 UNGCPRO; | |
| 428 | 3615 return Qnil; |
| 3616 } | |
| 3617 | |
| 3618 if (!auto_saving) | |
| 3619 { | |
| 3620 if (visiting_other) | |
| 3621 message ("Wrote %s", XSTRING_DATA (visit_file)); | |
| 3622 else | |
| 3623 { | |
| 446 | 3624 Lisp_Object fsp = Qnil; |
| 442 | 3625 struct gcpro nngcpro1; |
| 3626 | |
| 3627 NNGCPRO1 (fsp); | |
| 428 | 3628 fsp = Ffile_symlink_p (fn); |
| 3629 if (NILP (fsp)) | |
| 3630 message ("Wrote %s", XSTRING_DATA (fn)); | |
| 3631 else | |
| 3632 message ("Wrote %s (symlink to %s)", | |
| 3633 XSTRING_DATA (fn), XSTRING_DATA (fsp)); | |
| 442 | 3634 NNUNGCPRO; |
| 428 | 3635 } |
| 3636 } | |
| 442 | 3637 NUNGCPRO; |
| 3638 UNGCPRO; | |
| 428 | 3639 return Qnil; |
| 3640 } | |
| 3641 | |
| 3642 /* Build the complete list of annotations appropriate for writing out | |
| 3643 the text between START and END, by calling all the functions in | |
| 3644 write-region-annotate-functions and merging the lists they return. | |
| 3645 If one of these functions switches to a different buffer, we assume | |
| 3646 that buffer contains altered text. Therefore, the caller must | |
| 3647 make sure to restore the current buffer in all cases, | |
| 3648 as save-excursion would do. */ | |
| 3649 | |
| 3650 static Lisp_Object | |
| 3651 build_annotations (Lisp_Object start, Lisp_Object end) | |
| 3652 { | |
| 3653 /* This function can GC */ | |
| 3654 Lisp_Object annotations; | |
| 3655 Lisp_Object p, res; | |
| 3656 struct gcpro gcpro1, gcpro2; | |
| 793 | 3657 Lisp_Object original_buffer = wrap_buffer (current_buffer); |
| 3658 | |
| 428 | 3659 |
| 3660 annotations = Qnil; | |
| 3661 p = Vwrite_region_annotate_functions; | |
| 3662 GCPRO2 (annotations, p); | |
| 3663 while (!NILP (p)) | |
| 3664 { | |
| 3665 struct buffer *given_buffer = current_buffer; | |
| 3666 Vwrite_region_annotations_so_far = annotations; | |
| 3667 res = call2 (Fcar (p), start, end); | |
| 3668 /* If the function makes a different buffer current, | |
| 3669 assume that means this buffer contains altered text to be output. | |
| 3670 Reset START and END from the buffer bounds | |
| 3671 and discard all previous annotations because they should have | |
| 3672 been dealt with by this function. */ | |
| 3673 if (current_buffer != given_buffer) | |
| 3674 { | |
| 3675 start = make_int (BUF_BEGV (current_buffer)); | |
| 3676 end = make_int (BUF_ZV (current_buffer)); | |
| 3677 annotations = Qnil; | |
| 3678 } | |
| 3679 Flength (res); /* Check basic validity of return value */ | |
|
5182
2e528066e2fc
Move #'sort*, #'fill, #'merge to C from cl-seq.el.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5004
diff
changeset
|
3680 annotations = list_merge (annotations, res, NULL, Qlss, Qcar); |
| 428 | 3681 p = Fcdr (p); |
| 3682 } | |
| 3683 | |
| 3684 /* Now do the same for annotation functions implied by the file-format */ | |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3685 if (UNBOUNDP (XSYMBOL_FUNCTION (Qformat_annotate_function))) |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3686 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3687 p = Qnil; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3688 } |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3689 else if (auto_saving && (!EQ (Vauto_save_file_format, Qt))) |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3690 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3691 p = Vauto_save_file_format; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3692 } |
| 428 | 3693 else |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3694 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3695 p = current_buffer->file_format; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3696 } |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3697 |
| 428 | 3698 while (!NILP (p)) |
| 3699 { | |
| 3700 struct buffer *given_buffer = current_buffer; | |
| 3701 Vwrite_region_annotations_so_far = annotations; | |
| 3702 res = call4 (Qformat_annotate_function, Fcar (p), start, end, | |
| 3703 original_buffer); | |
| 3704 if (current_buffer != given_buffer) | |
| 3705 { | |
| 3706 start = make_int (BUF_BEGV (current_buffer)); | |
| 3707 end = make_int (BUF_ZV (current_buffer)); | |
| 3708 annotations = Qnil; | |
| 3709 } | |
| 3710 Flength (res); | |
|
5182
2e528066e2fc
Move #'sort*, #'fill, #'merge to C from cl-seq.el.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5004
diff
changeset
|
3711 annotations = list_merge (annotations, res, NULL, Qlss, Qcar); |
| 428 | 3712 p = Fcdr (p); |
| 3713 } | |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3714 |
| 428 | 3715 UNGCPRO; |
| 3716 return annotations; | |
| 3717 } | |
| 3718 | |
| 3719 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until | |
| 3720 EOF is encountered), assuming they start at position POS in the buffer | |
| 3721 of string that STREAM refers to. Intersperse with them the annotations | |
| 3722 from *ANNOT that fall into the range of positions we are reading from, | |
| 3723 each at its appropriate position. | |
| 3724 | |
| 3725 Modify *ANNOT by discarding elements as we output them. | |
| 3726 The return value is negative in case of system call failure. */ | |
| 3727 | |
| 3728 /* 4K should probably be fine. We just need to reduce the number of | |
| 3729 function calls to reasonable level. The Lstream stuff itself will | |
| 3730 batch to 64K to reduce the number of system calls. */ | |
| 3731 | |
| 3732 #define A_WRITE_BATCH_SIZE 4096 | |
| 3733 | |
| 3734 static int | |
| 3735 a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3736 Lisp_Object *annot) | |
| 3737 { | |
| 3738 Lisp_Object tem; | |
| 3739 int nextpos; | |
|
5000
44d7bde26046
fix compile errors, fix revert-buffer bug on binary/Latin 1 files, Mule-ize some files
Ben Wing <ben@xemacs.org>
parents:
4982
diff
changeset
|
3740 Ibyte largebuf[A_WRITE_BATCH_SIZE]; |
| 428 | 3741 Lstream *instr = XLSTREAM (instream); |
| 3742 Lstream *outstr = XLSTREAM (outstream); | |
| 3743 | |
| 3744 while (LISTP (*annot)) | |
| 3745 { | |
| 3746 tem = Fcar_safe (Fcar (*annot)); | |
| 3747 if (INTP (tem)) | |
| 3748 nextpos = XINT (tem); | |
| 3749 else | |
| 3750 nextpos = INT_MAX; | |
| 3751 #ifdef MULE | |
| 3752 /* If there are annotations left and we have Mule, then we | |
| 867 | 3753 have to do the I/O one ichar at a time so we can |
| 428 | 3754 determine when to insert the annotation. */ |
| 3755 if (!NILP (*annot)) | |
| 3756 { | |
| 867 | 3757 Ichar ch; |
| 3758 while (pos != nextpos && (ch = Lstream_get_ichar (instr)) != EOF) | |
| 428 | 3759 { |
| 867 | 3760 if (Lstream_put_ichar (outstr, ch) < 0) |
| 428 | 3761 return -1; |
| 3762 pos++; | |
| 3763 } | |
| 3764 } | |
| 3765 else | |
| 3766 #endif /* MULE */ | |
| 3767 { | |
| 3768 while (pos != nextpos) | |
| 3769 { | |
| 3770 /* Otherwise there is no point to that. Just go in batches. */ | |
| 3771 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE); | |
| 3772 | |
| 3773 chunk = Lstream_read (instr, largebuf, chunk); | |
| 3774 if (chunk < 0) | |
| 3775 return -1; | |
| 3776 if (chunk == 0) /* EOF */ | |
| 3777 break; | |
| 771 | 3778 if (Lstream_write (outstr, largebuf, chunk) < 0) |
| 428 | 3779 return -1; |
| 3780 pos += chunk; | |
| 3781 } | |
| 3782 } | |
| 3783 if (pos == nextpos) | |
| 3784 { | |
| 3785 tem = Fcdr (Fcar (*annot)); | |
| 3786 if (STRINGP (tem)) | |
| 3787 { | |
| 3788 if (Lstream_write (outstr, XSTRING_DATA (tem), | |
| 3789 XSTRING_LENGTH (tem)) < 0) | |
| 3790 return -1; | |
| 3791 } | |
| 3792 *annot = Fcdr (*annot); | |
| 3793 } | |
| 3794 else | |
| 3795 return 0; | |
| 3796 } | |
| 3797 return -1; | |
| 3798 } | |
| 3799 | |
| 3800 | |
| 3801 | |
| 3802 #if 0 | |
| 3803 #include <des_crypt.h> | |
| 3804 | |
| 3805 #define CRYPT_BLOCK_SIZE 8 /* bytes */ | |
| 3806 #define CRYPT_KEY_SIZE 8 /* bytes */ | |
| 3807 | |
| 3808 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /* | |
| 3809 Encrypt STRING using KEY. | |
| 3810 */ | |
| 3811 (string, key)) | |
| 3812 { | |
| 2367 | 3813 /* !!#### Needs work */ |
| 1333 | 3814 Extbyte *encrypted_string, *raw_key; |
| 3815 Extbyte *string_ext, *key_ext; | |
| 3816 Bytecount string_size_ext, key_size_ext, rounded_size, extra, key_size; | |
| 3817 | |
| 428 | 3818 CHECK_STRING (string); |
| 3819 CHECK_STRING (key); | |
| 3820 | |
| 1333 | 3821 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3822 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3823 | |
| 3824 extra = string_size_ext % CRYPT_BLOCK_SIZE; | |
| 3825 rounded_size = string_size_ext + extra; | |
| 851 | 3826 encrypted_string = ALLOCA (rounded_size + 1); |
| 1333 | 3827 memcpy (encrypted_string, string_ext, string_size_ext); |
| 428 | 3828 memset (encrypted_string + rounded_size - extra, 0, extra + 1); |
| 3829 | |
| 1333 | 3830 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3831 |
| 851 | 3832 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3833 memcpy (raw_key, key_ext, key_size); |
| 428 | 3834 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3835 | |
| 3836 ecb_crypt (raw_key, encrypted_string, rounded_size, | |
| 3837 DES_ENCRYPT | DES_SW); | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
3838 return make_extstring (encrypted_string, rounded_size, Qbinary); |
| 428 | 3839 } |
| 3840 | |
| 3841 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /* | |
| 3842 Decrypt STRING using KEY. | |
| 3843 */ | |
| 3844 (string, key)) | |
| 3845 { | |
| 1333 | 3846 Extbyte *decrypted_string, *raw_key; |
| 3847 Extbyte *string_ext, *key_ext; | |
| 3848 Bytecount string_size_ext, key_size_ext, string_size, key_size; | |
| 428 | 3849 |
| 3850 CHECK_STRING (string); | |
| 3851 CHECK_STRING (key); | |
| 3852 | |
| 1333 | 3853 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3854 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3855 | |
| 3856 string_size = string_size_ext + 1; | |
| 851 | 3857 decrypted_string = ALLOCA (string_size); |
| 1333 | 3858 memcpy (decrypted_string, string_ext, string_size); |
| 428 | 3859 decrypted_string[string_size - 1] = '\0'; |
| 3860 | |
| 1333 | 3861 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3862 |
| 851 | 3863 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3864 memcpy (raw_key, key_ext, key_size); |
| 428 | 3865 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3866 | |
| 3867 | |
| 3868 ecb_crypt (raw_key, decrypted_string, string_size, D | DES_SW); | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
3869 return make_extstring (decrypted_string, string_size - 1, Qbinary); |
| 428 | 3870 } |
| 3871 #endif /* 0 */ | |
| 3872 | |
| 3873 | |
| 3874 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /* | |
| 444 | 3875 Return t if last mod time of BUFFER's visited file matches what BUFFER records. |
| 428 | 3876 This means that the file has not been changed since it was visited or saved. |
| 3877 */ | |
| 444 | 3878 (buffer)) |
| 428 | 3879 { |
| 442 | 3880 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 3881 struct buffer *b; |
| 3882 struct stat st; | |
| 3883 Lisp_Object handler; | |
| 3884 | |
| 444 | 3885 CHECK_BUFFER (buffer); |
| 3886 b = XBUFFER (buffer); | |
| 428 | 3887 |
| 3888 if (!STRINGP (b->filename)) return Qt; | |
| 3889 if (b->modtime == 0) return Qt; | |
| 3890 | |
| 3891 /* If the file name has special constructs in it, | |
| 3892 call the corresponding file handler. */ | |
| 3893 handler = Ffind_file_name_handler (b->filename, | |
| 3894 Qverify_visited_file_modtime); | |
| 3895 if (!NILP (handler)) | |
| 444 | 3896 return call2 (handler, Qverify_visited_file_modtime, buffer); |
| 428 | 3897 |
| 771 | 3898 if (qxe_stat (XSTRING_DATA (b->filename), &st) < 0) |
| 428 | 3899 { |
| 3900 /* If the file doesn't exist now and didn't exist before, | |
| 3901 we say that it isn't modified, provided the error is a tame one. */ | |
| 3902 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
| 3903 st.st_mtime = -1; | |
| 3904 else | |
| 3905 st.st_mtime = 0; | |
| 3906 } | |
| 3907 if (st.st_mtime == b->modtime | |
| 3908 /* If both are positive, accept them if they are off by one second. */ | |
| 3909 || (st.st_mtime > 0 && b->modtime > 0 | |
| 3910 && (st.st_mtime == b->modtime + 1 | |
| 3911 || st.st_mtime == b->modtime - 1))) | |
| 3912 return Qt; | |
| 3913 return Qnil; | |
| 3914 } | |
| 3915 | |
| 3916 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /* | |
| 3917 Clear out records of last mod time of visited file. | |
| 3918 Next attempt to save will certainly not complain of a discrepancy. | |
| 3919 */ | |
| 3920 ()) | |
| 3921 { | |
| 3922 current_buffer->modtime = 0; | |
| 3923 return Qnil; | |
| 3924 } | |
| 3925 | |
| 3926 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /* | |
| 3927 Return the current buffer's recorded visited file modification time. | |
| 3928 The value is a list of the form (HIGH . LOW), like the time values | |
| 3929 that `file-attributes' returns. | |
| 3930 */ | |
| 3931 ()) | |
| 3932 { | |
| 3933 return time_to_lisp ((time_t) current_buffer->modtime); | |
| 3934 } | |
| 3935 | |
| 3936 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /* | |
| 3937 Update buffer's recorded modification time from the visited file's time. | |
| 3938 Useful if the buffer was not read from the file normally | |
| 3939 or if the file itself has been changed for some known benign reason. | |
| 3940 An argument specifies the modification time value to use | |
| 3941 \(instead of that of the visited file), in the form of a list | |
| 3942 \(HIGH . LOW) or (HIGH LOW). | |
| 3943 */ | |
| 3944 (time_list)) | |
| 3945 { | |
| 3946 /* This function can call lisp */ | |
| 3947 if (!NILP (time_list)) | |
| 3948 { | |
| 3949 time_t the_time; | |
| 3950 lisp_to_time (time_list, &the_time); | |
| 3951 current_buffer->modtime = (int) the_time; | |
| 3952 } | |
| 3953 else | |
| 3954 { | |
| 446 | 3955 Lisp_Object filename = Qnil; |
| 428 | 3956 struct stat st; |
| 3957 Lisp_Object handler; | |
| 3958 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 3959 | |
| 3960 GCPRO3 (filename, time_list, current_buffer->filename); | |
| 3961 filename = Fexpand_file_name (current_buffer->filename, Qnil); | |
| 3962 | |
| 3963 /* If the file name has special constructs in it, | |
| 3964 call the corresponding file handler. */ | |
| 3965 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); | |
| 3966 UNGCPRO; | |
| 3967 if (!NILP (handler)) | |
| 3968 /* The handler can find the file name the same way we did. */ | |
| 3969 return call2 (handler, Qset_visited_file_modtime, Qnil); | |
| 771 | 3970 else if (qxe_stat (XSTRING_DATA (filename), &st) >= 0) |
| 428 | 3971 current_buffer->modtime = st.st_mtime; |
| 3972 } | |
| 3973 | |
| 3974 return Qnil; | |
| 3975 } | |
| 3976 | |
| 3977 static Lisp_Object | |
| 2286 | 3978 auto_save_error (Lisp_Object UNUSED (condition_object), |
| 3979 Lisp_Object UNUSED (ignored)) | |
| 428 | 3980 { |
| 3981 /* This function can call lisp */ | |
| 3982 if (gc_in_progress) | |
| 3983 return Qnil; | |
| 3984 /* Don't try printing an error message after everything is gone! */ | |
| 3985 if (preparing_for_armageddon) | |
| 3986 return Qnil; | |
| 3987 clear_echo_area (selected_frame (), Qauto_saving, 1); | |
| 3988 Fding (Qt, Qauto_save_error, Qnil); | |
| 3989 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 3990 Fsleep_for (make_int (1)); | |
| 3991 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name)); | |
| 3992 Fsleep_for (make_int (1)); | |
| 3993 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 3994 Fsleep_for (make_int (1)); | |
| 3995 return Qnil; | |
| 3996 } | |
| 3997 | |
| 3998 static Lisp_Object | |
| 2286 | 3999 auto_save_1 (Lisp_Object UNUSED (ignored)) |
| 428 | 4000 { |
| 4001 /* This function can call lisp */ | |
| 4002 /* #### I think caller is protecting current_buffer? */ | |
| 4003 struct stat st; | |
| 4004 Lisp_Object fn = current_buffer->filename; | |
| 4005 Lisp_Object a = current_buffer->auto_save_file_name; | |
| 4006 | |
| 4007 if (!STRINGP (a)) | |
| 4008 return (Qnil); | |
| 4009 | |
| 4010 /* Get visited file's mode to become the auto save file's mode. */ | |
| 4011 if (STRINGP (fn) && | |
| 771 | 4012 qxe_stat (XSTRING_DATA (fn), &st) >= 0) |
| 428 | 4013 /* But make sure we can overwrite it later! */ |
| 4014 auto_save_mode_bits = st.st_mode | 0600; | |
| 4015 else | |
| 4016 /* default mode for auto-save files of buffers with no file is | |
| 4017 readable by owner only. This may annoy some small number of | |
| 4018 people, but the alternative removes all privacy from email. */ | |
| 4019 auto_save_mode_bits = 0600; | |
| 4020 | |
| 4021 return | |
| 4022 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil, | |
| 771 | 4023 #if 1 /* #### Kyle wants it changed to not use escape-quoted. Think |
| 4024 carefully about how this works. */ | |
| 4266 | 4025 Qescape_quoted, |
| 771 | 4026 #else |
| 4266 | 4027 current_buffer->buffer_file_coding_system, |
| 428 | 4028 #endif |
| 4266 | 4029 Qnil); |
| 428 | 4030 } |
| 4031 | |
| 4032 static Lisp_Object | |
| 2286 | 4033 auto_save_expand_name_error (Lisp_Object condition_object, |
| 4034 Lisp_Object UNUSED (ignored)) | |
| 428 | 4035 { |
| 771 | 4036 warn_when_safe_lispobj |
| 793 | 4037 (Qfile, Qerror, |
| 771 | 4038 Fcons (build_msg_string ("Invalid auto-save list-file"), |
| 4039 Fcons (Vauto_save_list_file_name, | |
| 4040 condition_object))); | |
| 428 | 4041 return Qnil; |
| 4042 } | |
| 4043 | |
| 4044 static Lisp_Object | |
| 4045 auto_save_expand_name (Lisp_Object name) | |
| 4046 { | |
| 4047 struct gcpro gcpro1; | |
| 4048 | |
| 4049 /* note that caller did NOT gc protect name, so we do it. */ | |
| 771 | 4050 /* [[dmoore - this might not be necessary, if condition_case_1 |
| 4051 protects it. but I don't think it does.]] indeed it doesn't. --ben */ | |
| 428 | 4052 GCPRO1 (name); |
| 4053 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil)); | |
| 4054 } | |
| 4055 | |
| 4056 | |
| 4057 static Lisp_Object | |
| 4058 do_auto_save_unwind (Lisp_Object fd) | |
| 4059 { | |
| 771 | 4060 retry_close (XINT (fd)); |
| 428 | 4061 return (fd); |
| 4062 } | |
| 4063 | |
| 4064 /* Fdo_auto_save() checks whether a GC is in progress when it is called, | |
| 4065 and if so, tries to avoid touching lisp objects. | |
| 4066 | |
| 4067 The only time that Fdo_auto_save() is called while GC is in progress | |
| 2500 | 4068 is if we're going down, as a result of an ABORT() or a kill signal. |
| 428 | 4069 It's fairly important that we generate autosave files in that case! |
| 4070 */ | |
| 4071 | |
| 4072 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /* | |
| 4073 Auto-save all buffers that need it. | |
| 4074 This is all buffers that have auto-saving enabled | |
| 4075 and are changed since last auto-saved. | |
| 4076 Auto-saving writes the buffer into a file | |
| 4077 so that your editing is not lost if the system crashes. | |
| 4078 This file is not the file you visited; that changes only when you save. | |
| 4079 Normally we run the normal hook `auto-save-hook' before saving. | |
| 4080 | |
| 4081 Non-nil first argument means do not print any message if successful. | |
| 4082 Non-nil second argument means save only current buffer. | |
| 4083 */ | |
| 4084 (no_message, current_only)) | |
| 4085 { | |
| 4086 /* This function can call lisp */ | |
| 4087 struct buffer *b; | |
| 4088 Lisp_Object tail, buf; | |
| 4089 int auto_saved = 0; | |
| 4090 int do_handled_files; | |
| 4091 Lisp_Object oquit = Qnil; | |
| 4092 Lisp_Object listfile = Qnil; | |
| 4093 Lisp_Object old; | |
| 4094 int listdesc = -1; | |
| 4095 int speccount = specpdl_depth (); | |
| 4096 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4097 | |
| 793 | 4098 old = wrap_buffer (current_buffer); |
| 428 | 4099 GCPRO3 (oquit, listfile, old); |
| 4100 check_quit (); /* make Vquit_flag accurate */ | |
| 4101 /* Ordinarily don't quit within this function, | |
| 4102 but don't make it impossible to quit (in case we get hung in I/O). */ | |
| 4103 oquit = Vquit_flag; | |
| 4104 Vquit_flag = Qnil; | |
| 4105 | |
| 4106 /* No further GCPRO needed, because (when it matters) all Lisp_Object | |
| 4107 variables point to non-strings reached from Vbuffer_alist. */ | |
| 4108 | |
| 4109 if (minibuf_level != 0 || preparing_for_armageddon) | |
| 4110 no_message = Qt; | |
| 4111 | |
| 4112 run_hook (Qauto_save_hook); | |
| 4113 | |
| 4114 if (STRINGP (Vauto_save_list_file_name)) | |
| 4115 listfile = condition_case_1 (Qt, | |
| 4116 auto_save_expand_name, | |
| 4117 Vauto_save_list_file_name, | |
| 4118 auto_save_expand_name_error, Qnil); | |
| 4119 | |
| 853 | 4120 internal_bind_int (&auto_saving, 1); |
| 428 | 4121 |
| 4122 /* First, save all files which don't have handlers. If Emacs is | |
| 4123 crashing, the handlers may tweak what is causing Emacs to crash | |
| 4124 in the first place, and it would be a shame if Emacs failed to | |
| 4125 autosave perfectly ordinary files because it couldn't handle some | |
| 4126 ange-ftp'd file. */ | |
| 4127 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
| 4128 { | |
| 4129 for (tail = Vbuffer_alist; | |
| 4130 CONSP (tail); | |
| 4131 tail = XCDR (tail)) | |
| 4132 { | |
| 4133 buf = XCDR (XCAR (tail)); | |
| 4134 b = XBUFFER (buf); | |
| 4135 | |
| 4136 if (!NILP (current_only) | |
| 4137 && b != current_buffer) | |
| 4138 continue; | |
| 4139 | |
| 4140 /* Don't auto-save indirect buffers. | |
| 4141 The base buffer takes care of it. */ | |
| 4142 if (b->base_buffer) | |
| 4143 continue; | |
| 4144 | |
| 4145 /* Check for auto save enabled | |
| 4146 and file changed since last auto save | |
| 4147 and file changed since last real save. */ | |
| 4148 if (STRINGP (b->auto_save_file_name) | |
| 4149 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) | |
| 4150 && b->auto_save_modified < BUF_MODIFF (b) | |
| 4151 /* -1 means we've turned off autosaving for a while--see below. */ | |
| 4152 && XINT (b->saved_size) >= 0 | |
| 4153 && (do_handled_files | |
| 4154 || NILP (Ffind_file_name_handler (b->auto_save_file_name, | |
| 4155 Qwrite_region)))) | |
| 4156 { | |
| 4157 EMACS_TIME before_time, after_time; | |
| 4158 | |
| 4159 EMACS_GET_TIME (before_time); | |
| 4160 /* If we had a failure, don't try again for 20 minutes. */ | |
| 4161 if (!preparing_for_armageddon | |
| 4162 && b->auto_save_failure_time >= 0 | |
| 4163 && (EMACS_SECS (before_time) - b->auto_save_failure_time < | |
| 4164 1200)) | |
| 4165 continue; | |
| 4166 | |
| 4167 if (!preparing_for_armageddon && | |
| 4168 (XINT (b->saved_size) * 10 | |
| 4169 > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
| 4170 /* A short file is likely to change a large fraction; | |
| 4171 spare the user annoying messages. */ | |
| 4172 && XINT (b->saved_size) > 5000 | |
| 4173 /* These messages are frequent and annoying for `*mail*'. */ | |
| 4174 && !NILP (b->filename) | |
| 4175 && NILP (no_message) | |
| 4176 && disable_auto_save_when_buffer_shrinks) | |
| 4177 { | |
| 4178 /* It has shrunk too much; turn off auto-saving here. | |
| 4179 Unless we're about to crash, in which case auto-save it | |
| 4180 anyway. | |
| 4181 */ | |
| 4182 message | |
| 4183 ("Buffer %s has shrunk a lot; auto save turned off there", | |
| 4184 XSTRING_DATA (b->name)); | |
| 4185 /* Turn off auto-saving until there's a real save, | |
| 4186 and prevent any more warnings. */ | |
| 4187 b->saved_size = make_int (-1); | |
| 4188 if (!gc_in_progress) | |
| 4189 Fsleep_for (make_int (1)); | |
| 4190 continue; | |
| 4191 } | |
| 4192 set_buffer_internal (b); | |
| 4193 if (!auto_saved && NILP (no_message)) | |
| 4194 { | |
| 1333 | 4195 static const Ibyte *msg = (const Ibyte *) "Auto-saving..."; |
| 428 | 4196 echo_area_message (selected_frame (), msg, Qnil, |
| 1333 | 4197 0, qxestrlen (msg), |
| 428 | 4198 Qauto_saving); |
| 4199 } | |
| 4200 | |
| 4201 /* Open the auto-save list file, if necessary. | |
| 4202 We only do this now so that the file only exists | |
| 4203 if we actually auto-saved any files. */ | |
| 444 | 4204 if (!auto_saved && !inhibit_auto_save_session |
| 4205 && !NILP (Vauto_save_list_file_prefix) | |
| 4206 && STRINGP (listfile) && listdesc < 0) | |
| 428 | 4207 { |
| 771 | 4208 listdesc = |
| 4209 qxe_open (XSTRING_DATA (listfile), | |
| 4210 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY, | |
| 4211 CREAT_MODE); | |
| 428 | 4212 |
| 4213 /* Arrange to close that file whether or not we get | |
| 4214 an error. */ | |
| 4215 if (listdesc >= 0) | |
| 4216 record_unwind_protect (do_auto_save_unwind, | |
| 4217 make_int (listdesc)); | |
| 4218 } | |
| 4219 | |
| 4220 /* Record all the buffers that we are auto-saving in | |
| 4221 the special file that lists them. For each of | |
| 4222 these buffers, record visited name (if any) and | |
| 4223 auto save name. */ | |
| 4224 if (listdesc >= 0) | |
| 4225 { | |
| 442 | 4226 const Extbyte *auto_save_file_name_ext; |
| 665 | 4227 Bytecount auto_save_file_name_ext_len; |
| 428 | 4228 |
|
4981
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|
4229 LISP_STRING_TO_SIZED_EXTERNAL (b->auto_save_file_name, |
|
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|
4230 auto_save_file_name_ext, |
|
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|
4231 auto_save_file_name_ext_len, |
|
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|
4232 Qescape_quoted); |
| 428 | 4233 if (!NILP (b->filename)) |
| 4234 { | |
| 442 | 4235 const Extbyte *filename_ext; |
| 665 | 4236 Bytecount filename_ext_len; |
| 428 | 4237 |
|
4981
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|
4238 LISP_STRING_TO_SIZED_EXTERNAL (b->filename, |
|
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|
4239 filename_ext, |
|
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|
4240 filename_ext_len, |
|
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|
4241 Qescape_quoted); |
| 771 | 4242 retry_write (listdesc, filename_ext, filename_ext_len); |
| 428 | 4243 } |
| 771 | 4244 retry_write (listdesc, "\n", 1); |
| 4245 retry_write (listdesc, auto_save_file_name_ext, | |
| 428 | 4246 auto_save_file_name_ext_len); |
| 771 | 4247 retry_write (listdesc, "\n", 1); |
| 428 | 4248 } |
| 4249 | |
| 4250 /* dmoore - In a bad scenario we've set b=XBUFFER(buf) | |
| 4251 based on values in Vbuffer_alist. auto_save_1 may | |
| 4252 cause lisp handlers to run. Those handlers may kill | |
| 4253 the buffer and then GC. Since the buffer is killed, | |
| 4254 it's no longer in Vbuffer_alist so it might get reaped | |
| 4255 by the GC. We also need to protect tail. */ | |
| 4256 /* #### There is probably a lot of other code which has | |
| 4257 pointers into buffers which may get blown away by | |
| 4258 handlers. */ | |
| 4259 { | |
| 4260 struct gcpro ngcpro1, ngcpro2; | |
| 4261 NGCPRO2 (buf, tail); | |
| 4262 condition_case_1 (Qt, | |
| 4263 auto_save_1, Qnil, | |
| 4264 auto_save_error, Qnil); | |
| 4265 NUNGCPRO; | |
| 4266 } | |
| 4267 /* Handler killed our saved current-buffer! Pick any. */ | |
| 4268 if (!BUFFER_LIVE_P (XBUFFER (old))) | |
| 793 | 4269 old = wrap_buffer (current_buffer); |
| 428 | 4270 |
| 4271 set_buffer_internal (XBUFFER (old)); | |
| 4272 auto_saved++; | |
| 4273 | |
| 4274 /* Handler killed their own buffer! */ | |
| 5198 | 4275 if (!BUFFER_LIVE_P (b)) |
| 428 | 4276 continue; |
| 4277 | |
| 4278 b->auto_save_modified = BUF_MODIFF (b); | |
| 4279 b->saved_size = make_int (BUF_SIZE (b)); | |
| 4280 EMACS_GET_TIME (after_time); | |
| 4281 /* If auto-save took more than 60 seconds, | |
| 4282 assume it was an NFS failure that got a timeout. */ | |
| 4283 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
| 4284 b->auto_save_failure_time = EMACS_SECS (after_time); | |
| 4285 } | |
| 4286 } | |
| 4287 } | |
| 4288 | |
| 4289 /* Prevent another auto save till enough input events come in. */ | |
| 4290 if (auto_saved) | |
| 4291 record_auto_save (); | |
| 4292 | |
| 4293 /* If we didn't save anything into the listfile, remove the old | |
| 4294 one because nothing needed to be auto-saved. Do this afterwards | |
| 4295 rather than before in case we get a crash attempting to autosave | |
| 4296 (in that case we'd still want the old one around). */ | |
| 4297 if (listdesc < 0 && !auto_saved && STRINGP (listfile)) | |
| 771 | 4298 qxe_unlink (XSTRING_DATA (listfile)); |
| 428 | 4299 |
| 4300 /* Show "...done" only if the echo area would otherwise be empty. */ | |
| 4301 if (auto_saved && NILP (no_message) | |
| 4302 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0))) | |
| 4303 { | |
| 1333 | 4304 static const Ibyte *msg = (const Ibyte *)"Auto-saving...done"; |
| 428 | 4305 echo_area_message (selected_frame (), msg, Qnil, 0, |
| 1333 | 4306 qxestrlen (msg), Qauto_saving); |
| 428 | 4307 } |
| 4308 | |
| 4309 Vquit_flag = oquit; | |
| 4310 | |
| 771 | 4311 RETURN_UNGCPRO (unbind_to (speccount)); |
| 428 | 4312 } |
| 4313 | |
| 4314 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /* | |
| 4315 Mark current buffer as auto-saved with its current text. | |
| 4316 No auto-save file will be written until the buffer changes again. | |
| 4317 */ | |
| 4318 ()) | |
| 4319 { | |
| 4320 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer); | |
| 4321 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 4322 current_buffer->auto_save_failure_time = -1; | |
| 4323 return Qnil; | |
| 4324 } | |
| 4325 | |
| 4326 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /* | |
| 4327 Clear any record of a recent auto-save failure in the current buffer. | |
| 4328 */ | |
| 4329 ()) | |
| 4330 { | |
| 4331 current_buffer->auto_save_failure_time = -1; | |
| 4332 return Qnil; | |
| 4333 } | |
| 4334 | |
| 4335 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /* | |
| 4336 Return t if buffer has been auto-saved since last read in or saved. | |
| 4337 */ | |
| 4338 ()) | |
| 4339 { | |
| 4340 return (BUF_SAVE_MODIFF (current_buffer) < | |
| 4341 current_buffer->auto_save_modified) ? Qt : Qnil; | |
| 4342 } | |
| 4343 | |
| 4344 | |
| 4345 /************************************************************************/ | |
| 4346 /* initialization */ | |
| 4347 /************************************************************************/ | |
| 4348 | |
| 4349 void | |
| 4350 syms_of_fileio (void) | |
| 4351 { | |
| 563 | 4352 DEFSYMBOL (Qexpand_file_name); |
| 4353 DEFSYMBOL (Qfile_truename); | |
| 4354 DEFSYMBOL (Qsubstitute_in_file_name); | |
| 4355 DEFSYMBOL (Qdirectory_file_name); | |
| 4356 DEFSYMBOL (Qfile_name_directory); | |
| 4357 DEFSYMBOL (Qfile_name_nondirectory); | |
| 996 | 4358 DEFSYMBOL (Qfile_name_sans_extension); |
| 563 | 4359 DEFSYMBOL (Qunhandled_file_name_directory); |
| 4360 DEFSYMBOL (Qfile_name_as_directory); | |
| 4361 DEFSYMBOL (Qcopy_file); | |
| 4362 DEFSYMBOL (Qmake_directory_internal); | |
| 4363 DEFSYMBOL (Qdelete_directory); | |
| 4364 DEFSYMBOL (Qdelete_file); | |
| 4365 DEFSYMBOL (Qrename_file); | |
| 4366 DEFSYMBOL (Qadd_name_to_file); | |
| 4367 DEFSYMBOL (Qmake_symbolic_link); | |
| 844 | 4368 DEFSYMBOL (Qmake_temp_name); |
| 563 | 4369 DEFSYMBOL (Qfile_exists_p); |
| 4370 DEFSYMBOL (Qfile_executable_p); | |
| 4371 DEFSYMBOL (Qfile_readable_p); | |
| 4372 DEFSYMBOL (Qfile_symlink_p); | |
| 4373 DEFSYMBOL (Qfile_writable_p); | |
| 4374 DEFSYMBOL (Qfile_directory_p); | |
| 4375 DEFSYMBOL (Qfile_regular_p); | |
| 4376 DEFSYMBOL (Qfile_accessible_directory_p); | |
| 4377 DEFSYMBOL (Qfile_modes); | |
| 4378 DEFSYMBOL (Qset_file_modes); | |
| 4379 DEFSYMBOL (Qfile_newer_than_file_p); | |
| 4380 DEFSYMBOL (Qinsert_file_contents); | |
| 4381 DEFSYMBOL (Qwrite_region); | |
| 4382 DEFSYMBOL (Qverify_visited_file_modtime); | |
| 4383 DEFSYMBOL (Qset_visited_file_modtime); | |
| 4384 DEFSYMBOL (Qcar_less_than_car); /* Vomitous! */ | |
| 4266 | 4385 DEFSYMBOL (Qexcl); |
| 563 | 4386 |
| 4387 DEFSYMBOL (Qauto_save_hook); | |
| 4388 DEFSYMBOL (Qauto_save_error); | |
| 4389 DEFSYMBOL (Qauto_saving); | |
| 4390 | |
| 4391 DEFSYMBOL (Qformat_decode); | |
| 4392 DEFSYMBOL (Qformat_annotate_function); | |
| 4393 | |
| 4394 DEFSYMBOL (Qcompute_buffer_file_truename); | |
| 4395 | |
| 442 | 4396 DEFERROR_STANDARD (Qfile_already_exists, Qfile_error); |
| 428 | 4397 |
| 4398 DEFSUBR (Ffind_file_name_handler); | |
| 4399 | |
| 4400 DEFSUBR (Ffile_name_directory); | |
| 4401 DEFSUBR (Ffile_name_nondirectory); | |
| 4402 DEFSUBR (Funhandled_file_name_directory); | |
| 4403 DEFSUBR (Ffile_name_as_directory); | |
| 4404 DEFSUBR (Fdirectory_file_name); | |
| 4405 DEFSUBR (Fmake_temp_name); | |
| 4406 DEFSUBR (Fexpand_file_name); | |
| 4407 DEFSUBR (Ffile_truename); | |
| 4408 DEFSUBR (Fsubstitute_in_file_name); | |
| 4409 DEFSUBR (Fcopy_file); | |
| 4410 DEFSUBR (Fmake_directory_internal); | |
| 4411 DEFSUBR (Fdelete_directory); | |
| 4412 DEFSUBR (Fdelete_file); | |
| 4413 DEFSUBR (Frename_file); | |
| 4414 DEFSUBR (Fadd_name_to_file); | |
| 4415 DEFSUBR (Fmake_symbolic_link); | |
| 4416 #ifdef HPUX_NET | |
| 4417 DEFSUBR (Fsysnetunam); | |
| 4418 #endif /* HPUX_NET */ | |
| 4419 DEFSUBR (Ffile_name_absolute_p); | |
| 4420 DEFSUBR (Ffile_exists_p); | |
| 4421 DEFSUBR (Ffile_executable_p); | |
| 4422 DEFSUBR (Ffile_readable_p); | |
| 4423 DEFSUBR (Ffile_writable_p); | |
| 4424 DEFSUBR (Ffile_symlink_p); | |
| 4425 DEFSUBR (Ffile_directory_p); | |
| 4426 DEFSUBR (Ffile_accessible_directory_p); | |
| 4427 DEFSUBR (Ffile_regular_p); | |
| 4428 DEFSUBR (Ffile_modes); | |
| 4429 DEFSUBR (Fset_file_modes); | |
| 4430 DEFSUBR (Fset_default_file_modes); | |
| 4431 DEFSUBR (Fdefault_file_modes); | |
| 4432 DEFSUBR (Funix_sync); | |
| 4433 DEFSUBR (Ffile_newer_than_file_p); | |
| 4434 DEFSUBR (Finsert_file_contents_internal); | |
| 4435 DEFSUBR (Fwrite_region_internal); | |
| 4436 #if 0 | |
| 4437 DEFSUBR (Fencrypt_string); | |
| 4438 DEFSUBR (Fdecrypt_string); | |
| 4439 #endif | |
| 4440 DEFSUBR (Fverify_visited_file_modtime); | |
| 4441 DEFSUBR (Fclear_visited_file_modtime); | |
| 4442 DEFSUBR (Fvisited_file_modtime); | |
| 4443 DEFSUBR (Fset_visited_file_modtime); | |
| 4444 | |
| 4445 DEFSUBR (Fdo_auto_save); | |
| 4446 DEFSUBR (Fset_buffer_auto_saved); | |
| 4447 DEFSUBR (Fclear_buffer_auto_save_failure); | |
| 4448 DEFSUBR (Frecent_auto_save_p); | |
| 4449 } | |
| 4450 | |
| 4451 void | |
| 4452 vars_of_fileio (void) | |
| 4453 { | |
| 2526 | 4454 QSin_expand_file_name = |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4867
diff
changeset
|
4455 build_defer_string ("(in expand-file-name)"); |
| 2526 | 4456 staticpro (&QSin_expand_file_name); |
| 4457 | |
| 428 | 4458 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /* |
| 4459 *Format in which to write auto-save files. | |
| 4460 Should be a list of symbols naming formats that are defined in `format-alist'. | |
| 4461 If it is t, which is the default, auto-save files are written in the | |
| 4462 same format as a regular save would use. | |
| 4463 */ ); | |
| 4464 Vauto_save_file_format = Qt; | |
| 4465 | |
| 4466 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /* | |
| 4467 *Alist of elements (REGEXP . HANDLER) for file names handled specially. | |
| 4468 If a file name matches REGEXP, then all I/O on that file is done by calling | |
| 4469 HANDLER. | |
| 4470 | |
| 4471 The first argument given to HANDLER is the name of the I/O primitive | |
| 4472 to be handled; the remaining arguments are the arguments that were | |
| 4473 passed to that primitive. For example, if you do | |
| 4474 (file-exists-p FILENAME) | |
| 4475 and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
| 4476 (funcall HANDLER 'file-exists-p FILENAME) | |
| 4477 The function `find-file-name-handler' checks this list for a handler | |
| 4478 for its argument. | |
| 4479 */ ); | |
| 4480 Vfile_name_handler_alist = Qnil; | |
| 4481 | |
| 4482 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /* | |
| 4483 A list of functions to be called at the end of `insert-file-contents'. | |
| 4484 Each is passed one argument, the number of bytes inserted. It should return | |
| 4485 the new byte count, and leave point the same. If `insert-file-contents' is | |
| 4486 intercepted by a handler from `file-name-handler-alist', that handler is | |
| 4487 responsible for calling the after-insert-file-functions if appropriate. | |
| 4488 */ ); | |
| 4489 Vafter_insert_file_functions = Qnil; | |
| 4490 | |
| 4491 DEFVAR_LISP ("write-region-annotate-functions", | |
| 4492 &Vwrite_region_annotate_functions /* | |
| 4493 A list of functions to be called at the start of `write-region'. | |
| 4494 Each is passed two arguments, START and END, as for `write-region'. | |
| 4495 It should return a list of pairs (POSITION . STRING) of strings to be | |
| 4496 effectively inserted at the specified positions of the file being written | |
| 4497 \(1 means to insert before the first byte written). The POSITIONs must be | |
| 4498 sorted into increasing order. If there are several functions in the list, | |
| 4499 the several lists are merged destructively. | |
| 4500 */ ); | |
| 4501 Vwrite_region_annotate_functions = Qnil; | |
| 4502 | |
| 4503 DEFVAR_LISP ("write-region-annotations-so-far", | |
| 4504 &Vwrite_region_annotations_so_far /* | |
| 4505 When an annotation function is called, this holds the previous annotations. | |
| 4506 These are the annotations made by other annotation functions | |
| 4507 that were already called. See also `write-region-annotate-functions'. | |
| 4508 */ ); | |
| 4509 Vwrite_region_annotations_so_far = Qnil; | |
| 4510 | |
| 4511 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /* | |
| 4512 A list of file name handlers that temporarily should not be used. | |
| 4513 This applies only to the operation `inhibit-file-name-operation'. | |
| 4514 */ ); | |
| 4515 Vinhibit_file_name_handlers = Qnil; | |
| 4516 | |
| 4517 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /* | |
| 4518 The operation for which `inhibit-file-name-handlers' is applicable. | |
| 4519 */ ); | |
| 4520 Vinhibit_file_name_operation = Qnil; | |
| 4521 | |
| 4522 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /* | |
| 4523 File name in which we write a list of all auto save file names. | |
| 4524 */ ); | |
| 4525 Vauto_save_list_file_name = Qnil; | |
| 4526 | |
|
4499
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
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4465
diff
changeset
|
4527 #ifdef HAVE_FSYNC |
|
eb82259f265d
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Aidan Kehoe <kehoea@parhasard.net>
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4465
diff
changeset
|
4528 DEFVAR_BOOL ("write-region-inhibit-fsync", &write_region_inhibit_fsync /* |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
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4465
diff
changeset
|
4529 *Non-nil means don't call fsync in `write-region'. |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4530 This variable affects calls to `write-region' as well as save commands. |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4531 A non-nil value may result in data loss! |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4532 */ ); |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
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4465
diff
changeset
|
4533 write_region_inhibit_fsync = 0; |
|
eb82259f265d
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4534 #endif |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
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4465
diff
changeset
|
4535 |
| 444 | 4536 DEFVAR_LISP ("auto-save-list-file-prefix", &Vauto_save_list_file_prefix /* |
| 4537 Prefix for generating auto-save-list-file-name. | |
| 4538 Emacs's pid and the system name will be appended to | |
| 4539 this prefix to create a unique file name. | |
| 4540 */ ); | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4867
diff
changeset
|
4541 Vauto_save_list_file_prefix = build_ascstring ("~/.saves-"); |
| 444 | 4542 |
| 4543 DEFVAR_BOOL ("inhibit-auto-save-session", &inhibit_auto_save_session /* | |
| 4544 When non-nil, inhibit auto save list file creation. | |
| 4545 */ ); | |
| 4546 inhibit_auto_save_session = 0; | |
| 4547 | |
| 428 | 4548 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks", |
| 4549 &disable_auto_save_when_buffer_shrinks /* | |
| 4550 If non-nil, auto-saving is disabled when a buffer shrinks too much. | |
| 4551 This is to prevent you from losing your edits if you accidentally | |
| 4552 delete a large chunk of the buffer and don't notice it until too late. | |
| 4553 Saving the buffer normally turns auto-save back on. | |
| 4554 */ ); | |
| 4555 disable_auto_save_when_buffer_shrinks = 1; | |
| 4556 | |
| 4557 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /* | |
| 4558 Directory separator character for built-in functions that return file names. | |
| 4559 The value should be either ?/ or ?\\ (any other value is treated as ?\\). | |
| 4560 This variable affects the built-in functions only on Windows, | |
| 4561 on other platforms, it is initialized so that Lisp code can find out | |
| 4562 what the normal separator is. | |
| 4563 */ ); | |
| 771 | 4564 Vdirectory_sep_char = make_char (DEFAULT_DIRECTORY_SEP); |
|
5211
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4565 |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4566 DEFVAR_CONST_BOOL ("default-file-system-ignore-case", &default_file_system_ignore_case /* |
|
cdca98f2d36f
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Aidan Kehoe <kehoea@parhasard.net>
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5198
diff
changeset
|
4567 What `file-system-ignore-case-p' returns by default. |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4568 This is in the case that nothing in `file-system-case-alist' matches. |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4569 */ ); |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4570 #ifdef DEFAULT_FILE_SYSTEM_IGNORE_CASE |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4571 default_file_system_ignore_case = DEFAULT_FILE_SYSTEM_IGNORE_CASE; |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4572 #else |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4573 default_file_system_ignore_case = 0; |
|
cdca98f2d36f
Move `default-file-system-ignore-case' to C; fix bug in directory hash tables
Aidan Kehoe <kehoea@parhasard.net>
parents:
5198
diff
changeset
|
4574 #endif |
| 428 | 4575 } |
| 442 | 4576 |
| 4577 void | |
| 4578 reinit_vars_of_fileio (void) | |
| 4579 { | |
| 4580 /* We want temp_name_rand to be initialized to a value likely to be | |
| 4581 unique to the process, not to the executable. The danger is that | |
| 4582 two different XEmacs processes using the same binary on different | |
| 4583 machines creating temp files in the same directory will be | |
| 4584 unlucky enough to have the same pid. If we randomize using | |
| 4585 process startup time, then in practice they will be unlikely to | |
| 4586 collide. We use the microseconds field so that scripts that start | |
| 4587 simultaneous XEmacs processes on multiple machines will have less | |
| 4588 chance of collision. */ | |
| 4589 { | |
| 4590 EMACS_TIME thyme; | |
| 4591 | |
| 4592 EMACS_GET_TIME (thyme); | |
| 4593 temp_name_rand = (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme)); | |
| 4594 } | |
| 4595 } |