Mercurial > hg > xemacs-beta
annotate src/fileio.c @ 5028:b7232de2a937
Add information about repos and VCSes to FAQ.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Wed, 10 Feb 2010 20:51:51 +0900 |
| parents | 788c38f20376 |
| children | 2e528066e2fc |
| 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 #ifdef HAVE_FSYNC |
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112 /* Nonzero means skip the call to fsync in Fwrite-region. */ |
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113 int write_region_inhibit_fsync; |
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114 #endif |
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115 |
| 428 | 116 /* These variables describe handlers that have "already" had a chance |
| 117 to handle the current operation. | |
| 118 | |
| 119 Vinhibit_file_name_handlers is a list of file name handlers. | |
| 120 Vinhibit_file_name_operation is the operation being handled. | |
| 121 If we try to handle that operation, we ignore those handlers. */ | |
| 122 | |
| 123 static Lisp_Object Vinhibit_file_name_handlers; | |
| 124 static Lisp_Object Vinhibit_file_name_operation; | |
| 125 | |
| 563 | 126 Lisp_Object Qfile_already_exists; |
| 4266 | 127 Lisp_Object Qexcl; |
| 428 | 128 |
| 129 Lisp_Object Qauto_save_hook; | |
| 130 Lisp_Object Qauto_save_error; | |
| 131 Lisp_Object Qauto_saving; | |
| 132 | |
| 133 Lisp_Object Qcar_less_than_car; | |
| 134 | |
| 135 Lisp_Object Qcompute_buffer_file_truename; | |
| 136 | |
| 2526 | 137 Lisp_Object QSin_expand_file_name; |
| 138 | |
| 428 | 139 EXFUN (Frunning_temacs_p, 0); |
| 140 | |
| 563 | 141 DOESNT_RETURN |
| 142 report_error_with_errno (Lisp_Object errtype, | |
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143 const Ascbyte *reason, Lisp_Object data) |
| 563 | 144 { |
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145 signal_error_2 (errtype, reason, lisp_strerror (errno), data); |
| 563 | 146 } |
| 147 | |
| 428 | 148 /* signal a file error when errno contains a meaningful value. */ |
| 149 | |
| 150 DOESNT_RETURN | |
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151 report_file_error (const Ascbyte *reason, Lisp_Object data) |
| 428 | 152 { |
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153 report_error_with_errno (Qfile_error, reason, data); |
| 428 | 154 } |
| 155 | |
| 156 | |
| 157 /* Just like strerror(3), except return a lisp string instead of char *. | |
| 158 The string needs to be converted since it may be localized. | |
| 771 | 159 */ |
| 428 | 160 Lisp_Object |
| 161 lisp_strerror (int errnum) | |
| 162 { | |
| 771 | 163 Extbyte *ret = strerror (errnum); |
| 164 if (!ret) | |
| 165 { | |
| 867 | 166 Ibyte ffff[99]; |
| 771 | 167 qxesprintf (ffff, "Unknown error %d", errnum); |
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168 return build_istring (ffff); |
| 771 | 169 } |
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170 return build_extstring (ret, Qstrerror_encoding); |
| 428 | 171 } |
| 172 | |
| 173 static Lisp_Object | |
| 174 close_file_unwind (Lisp_Object fd) | |
| 175 { | |
| 176 if (CONSP (fd)) | |
| 177 { | |
| 178 if (INTP (XCAR (fd))) | |
| 771 | 179 retry_close (XINT (XCAR (fd))); |
| 428 | 180 |
| 853 | 181 free_cons (fd); |
| 428 | 182 } |
| 183 else | |
| 771 | 184 retry_close (XINT (fd)); |
| 428 | 185 |
| 186 return Qnil; | |
| 187 } | |
| 188 | |
| 189 static Lisp_Object | |
| 190 delete_stream_unwind (Lisp_Object stream) | |
| 191 { | |
| 192 Lstream_delete (XLSTREAM (stream)); | |
| 193 return Qnil; | |
| 194 } | |
| 195 | |
| 196 /* Restore point, having saved it as a marker. */ | |
| 197 | |
| 198 static Lisp_Object | |
| 199 restore_point_unwind (Lisp_Object point_marker) | |
| 200 { | |
| 201 BUF_SET_PT (current_buffer, marker_position (point_marker)); | |
| 202 return Fset_marker (point_marker, Qnil, Qnil); | |
| 203 } | |
| 204 | |
| 205 | |
| 206 Lisp_Object Qexpand_file_name; | |
| 207 Lisp_Object Qfile_truename; | |
| 208 Lisp_Object Qsubstitute_in_file_name; | |
| 209 Lisp_Object Qdirectory_file_name; | |
| 210 Lisp_Object Qfile_name_directory; | |
| 211 Lisp_Object Qfile_name_nondirectory; | |
| 996 | 212 Lisp_Object Qfile_name_sans_extension; |
| 428 | 213 Lisp_Object Qunhandled_file_name_directory; |
| 214 Lisp_Object Qfile_name_as_directory; | |
| 215 Lisp_Object Qcopy_file; | |
| 216 Lisp_Object Qmake_directory_internal; | |
| 217 Lisp_Object Qdelete_directory; | |
| 218 Lisp_Object Qdelete_file; | |
| 219 Lisp_Object Qrename_file; | |
| 220 Lisp_Object Qadd_name_to_file; | |
| 221 Lisp_Object Qmake_symbolic_link; | |
| 844 | 222 Lisp_Object Qmake_temp_name; |
| 428 | 223 Lisp_Object Qfile_exists_p; |
| 224 Lisp_Object Qfile_executable_p; | |
| 225 Lisp_Object Qfile_readable_p; | |
| 226 Lisp_Object Qfile_symlink_p; | |
| 227 Lisp_Object Qfile_writable_p; | |
| 228 Lisp_Object Qfile_directory_p; | |
| 229 Lisp_Object Qfile_regular_p; | |
| 230 Lisp_Object Qfile_accessible_directory_p; | |
| 231 Lisp_Object Qfile_modes; | |
| 232 Lisp_Object Qset_file_modes; | |
| 233 Lisp_Object Qfile_newer_than_file_p; | |
| 234 Lisp_Object Qinsert_file_contents; | |
| 235 Lisp_Object Qwrite_region; | |
| 236 Lisp_Object Qverify_visited_file_modtime; | |
| 237 Lisp_Object Qset_visited_file_modtime; | |
| 238 | |
| 239 /* If FILENAME is handled specially on account of its syntax, | |
| 240 return its handler function. Otherwise, return nil. */ | |
| 241 | |
| 242 DEFUN ("find-file-name-handler", Ffind_file_name_handler, 1, 2, 0, /* | |
| 243 Return FILENAME's handler function for OPERATION, if it has one. | |
| 244 Otherwise, return nil. | |
| 245 A file name is handled if one of the regular expressions in | |
| 246 `file-name-handler-alist' matches it. | |
| 247 | |
| 248 If OPERATION equals `inhibit-file-name-operation', then we ignore | |
| 249 any handlers that are members of `inhibit-file-name-handlers', | |
| 250 but we still do run any other handlers. This lets handlers | |
| 251 use the standard functions without calling themselves recursively. | |
| 751 | 252 |
| 253 Otherwise, OPERATION is the name of a funcall'able function. | |
| 428 | 254 */ |
| 255 (filename, operation)) | |
| 256 { | |
| 257 /* This function does not GC */ | |
| 258 /* This function can be called during GC */ | |
| 259 /* This function must not munge the match data. */ | |
| 2367 | 260 Lisp_Object inhibited_handlers; |
| 428 | 261 |
| 262 CHECK_STRING (filename); | |
| 263 | |
| 264 if (EQ (operation, Vinhibit_file_name_operation)) | |
| 265 inhibited_handlers = Vinhibit_file_name_handlers; | |
| 266 else | |
| 267 inhibited_handlers = Qnil; | |
| 268 | |
| 2367 | 269 { |
| 270 EXTERNAL_LIST_LOOP_2 (elt, Vfile_name_handler_alist) | |
| 271 { | |
| 272 if (CONSP (elt)) | |
| 273 { | |
| 274 Lisp_Object string = XCAR (elt); | |
| 275 if (STRINGP (string) | |
| 276 && (fast_lisp_string_match (string, filename) >= 0)) | |
| 277 { | |
| 278 Lisp_Object handler = XCDR (elt); | |
| 279 if (NILP (Fmemq (handler, inhibited_handlers))) | |
| 280 return handler; | |
| 281 } | |
| 282 } | |
| 283 } | |
| 284 } | |
| 428 | 285 return Qnil; |
| 286 } | |
| 287 | |
| 288 static Lisp_Object | |
| 289 call2_check_string (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 290 { | |
| 291 /* This function can call lisp */ | |
| 292 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 293 CHECK_STRING (result); | |
| 294 return result; | |
| 295 } | |
| 296 | |
| 297 static Lisp_Object | |
| 298 call2_check_string_or_nil (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 299 { | |
| 300 /* This function can call lisp */ | |
| 301 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 302 if (!NILP (result)) | |
| 303 CHECK_STRING (result); | |
| 304 return result; | |
| 305 } | |
| 306 | |
| 307 static Lisp_Object | |
| 308 call3_check_string (Lisp_Object fn, Lisp_Object arg0, | |
| 309 Lisp_Object arg1, Lisp_Object arg2) | |
| 310 { | |
| 311 /* This function can call lisp */ | |
| 312 Lisp_Object result = call3 (fn, arg0, arg1, arg2); | |
| 313 CHECK_STRING (result); | |
| 314 return result; | |
| 315 } | |
| 316 | |
| 317 | |
| 2526 | 318 |
| 319 Ibyte * | |
| 320 find_end_of_directory_component (const Ibyte *path, Bytecount len) | |
| 321 { | |
| 322 const Ibyte *p = path + len; | |
| 323 | |
| 324 while (p != path && !IS_DIRECTORY_SEP (p[-1]) | |
| 325 #ifdef WIN32_FILENAMES | |
| 326 /* only recognise drive specifier at the beginning */ | |
| 327 && !(p[-1] == ':' | |
| 328 /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
| 329 && ((p == path + 2 && !IS_DIRECTORY_SEP (*path)) | |
| 330 || (p == path + 4 && IS_DIRECTORY_SEP (*path)))) | |
| 331 #endif | |
| 332 ) p--; | |
| 333 | |
| 334 return (Ibyte *) p; | |
| 335 } | |
| 336 | |
| 428 | 337 DEFUN ("file-name-directory", Ffile_name_directory, 1, 1, 0, /* |
| 444 | 338 Return the directory component in file name FILENAME. |
| 339 Return nil if FILENAME does not include a directory. | |
| 428 | 340 Otherwise return a directory spec. |
| 341 Given a Unix syntax file name, returns a string ending in slash. | |
| 342 */ | |
| 444 | 343 (filename)) |
| 428 | 344 { |
| 442 | 345 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 346 /* This function synched with Emacs 21.0.103. */ |
| 867 | 347 Ibyte *beg; |
| 348 Ibyte *p; | |
| 428 | 349 Lisp_Object handler; |
| 350 | |
| 444 | 351 CHECK_STRING (filename); |
| 428 | 352 |
| 353 /* If the file name has special constructs in it, | |
| 354 call the corresponding file handler. */ | |
| 444 | 355 handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
| 428 | 356 if (!NILP (handler)) |
| 444 | 357 return call2_check_string_or_nil (handler, Qfile_name_directory, filename); |
| 428 | 358 |
| 359 #ifdef FILE_SYSTEM_CASE | |
| 444 | 360 filename = FILE_SYSTEM_CASE (filename); |
| 428 | 361 #endif |
| 444 | 362 beg = XSTRING_DATA (filename); |
| 771 | 363 /* XEmacs: no need to alloca-copy here */ |
| 2526 | 364 p = find_end_of_directory_component (beg, XSTRING_LENGTH (filename)); |
| 428 | 365 |
| 366 if (p == beg) | |
| 367 return Qnil; | |
| 442 | 368 #ifdef WIN32_NATIVE |
| 428 | 369 /* Expansion of "c:" to drive and default directory. */ |
| 771 | 370 if (p[-1] == ':') |
| 428 | 371 { |
| 867 | 372 Ibyte *res; |
| 373 Ibyte *wd = mswindows_getdcwd (toupper (*beg) - 'A' + 1); | |
| 771 | 374 |
| 2367 | 375 res = alloca_ibytes ((wd ? qxestrlen (wd) : 0) + 10); /* go overboard */ |
| 1116 | 376 res[0] = '\0'; |
| 771 | 377 if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') |
| 378 { | |
| 379 qxestrncpy (res, beg, 2); | |
| 380 beg += 2; | |
| 1116 | 381 res[2] = '\0'; |
| 771 | 382 } |
| 383 | |
| 384 if (wd) | |
| 428 | 385 { |
| 3648 | 386 int size; |
| 771 | 387 qxestrcat (res, wd); |
| 3648 | 388 size = qxestrlen (res); |
| 389 if (!IS_DIRECTORY_SEP (res[size - 1])) | |
| 390 { | |
| 391 res[size] = DIRECTORY_SEP; | |
| 392 res[size + 1] = '\0'; | |
| 393 } | |
| 428 | 394 beg = res; |
| 771 | 395 p = beg + qxestrlen (beg); |
| 428 | 396 } |
| 3648 | 397 else |
| 398 { | |
| 399 return Qnil; | |
| 400 } | |
| 771 | 401 if (wd) |
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402 xfree (wd); |
| 428 | 403 } |
| 771 | 404 |
| 405 #if 0 /* No! This screws up efs, which calls file-name-directory on URL's | |
| 406 and expects the slashes to be left alone. This is here because of | |
| 407 an analogous call in FSF 21. */ | |
| 408 { | |
| 409 Bytecount len = p - beg; | |
| 867 | 410 Ibyte *newbeg = alloca_ibytes (len + 1); |
| 771 | 411 |
| 412 qxestrncpy (newbeg, beg, len); | |
| 413 newbeg[len] = '\0'; | |
| 414 newbeg = mswindows_canonicalize_filename (newbeg); | |
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415 return build_istring (newbeg); |
| 771 | 416 } |
| 417 #endif | |
| 418 #endif /* not WIN32_NATIVE */ | |
| 428 | 419 return make_string (beg, p - beg); |
| 420 } | |
| 421 | |
| 422 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, 1, 1, 0, /* | |
| 444 | 423 Return file name FILENAME sans its directory. |
| 428 | 424 For example, in a Unix-syntax file name, |
| 425 this is everything after the last slash, | |
| 426 or the entire name if it contains no slash. | |
| 427 */ | |
| 444 | 428 (filename)) |
| 428 | 429 { |
| 442 | 430 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 431 /* This function synched with Emacs 21.0.103. */ |
| 867 | 432 Ibyte *beg, *p, *end; |
| 428 | 433 Lisp_Object handler; |
| 434 | |
| 444 | 435 CHECK_STRING (filename); |
| 428 | 436 |
| 437 /* If the file name has special constructs in it, | |
| 438 call the corresponding file handler. */ | |
| 444 | 439 handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
| 428 | 440 if (!NILP (handler)) |
| 444 | 441 return call2_check_string (handler, Qfile_name_nondirectory, filename); |
| 442 | |
| 443 beg = XSTRING_DATA (filename); | |
| 444 end = p = beg + XSTRING_LENGTH (filename); | |
| 428 | 445 |
| 771 | 446 while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
| 657 | 447 #ifdef WIN32_FILENAMES |
| 771 | 448 /* only recognise drive specifier at beginning */ |
| 449 && !(p[-1] == ':' | |
| 450 /* handle the "/:d:foo" case correctly */ | |
| 451 && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
| 428 | 452 #endif |
| 771 | 453 ) |
| 454 p--; | |
| 428 | 455 |
| 456 return make_string (p, end - p); | |
| 457 } | |
| 458 | |
| 459 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, 1, 1, 0, /* | |
| 460 Return a directly usable directory name somehow associated with FILENAME. | |
| 461 A `directly usable' directory name is one that may be used without the | |
| 462 intervention of any file handler. | |
| 463 If FILENAME is a directly usable file itself, return | |
| 464 \(file-name-directory FILENAME). | |
| 465 The `call-process' and `start-process' functions use this function to | |
| 466 get a current directory to run processes in. | |
| 467 */ | |
| 444 | 468 (filename)) |
| 428 | 469 { |
| 442 | 470 /* This function can GC. GC checked 2000-07-28 ben */ |
| 428 | 471 Lisp_Object handler; |
| 472 | |
| 473 /* If the file name has special constructs in it, | |
| 474 call the corresponding file handler. */ | |
| 475 handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); | |
| 476 if (!NILP (handler)) | |
| 477 return call2 (handler, Qunhandled_file_name_directory, | |
| 478 filename); | |
| 479 | |
| 480 return Ffile_name_directory (filename); | |
| 481 } | |
| 482 | |
| 483 | |
| 867 | 484 static Ibyte * |
| 485 file_name_as_directory (Ibyte *out, Ibyte *in) | |
| 428 | 486 { |
| 442 | 487 /* This function cannot GC */ |
| 771 | 488 int size = qxestrlen (in); |
| 428 | 489 |
| 490 if (size == 0) | |
| 491 { | |
| 492 out[0] = '.'; | |
| 493 out[1] = DIRECTORY_SEP; | |
| 494 out[2] = '\0'; | |
| 495 } | |
| 496 else | |
| 497 { | |
| 771 | 498 qxestrcpy (out, in); |
| 428 | 499 /* Append a slash if necessary */ |
| 500 if (!IS_ANY_SEP (out[size-1])) | |
| 501 { | |
| 502 out[size] = DIRECTORY_SEP; | |
| 503 out[size + 1] = '\0'; | |
| 504 } | |
| 505 } | |
| 506 return out; | |
| 507 } | |
| 508 | |
| 509 DEFUN ("file-name-as-directory", Ffile_name_as_directory, 1, 1, 0, /* | |
| 510 Return a string representing file FILENAME interpreted as a directory. | |
| 511 This operation exists because a directory is also a file, but its name as | |
| 512 a directory is different from its name as a file. | |
| 513 The result can be used as the value of `default-directory' | |
| 514 or passed as second argument to `expand-file-name'. | |
| 515 For a Unix-syntax file name, just appends a slash, | |
| 516 except for (file-name-as-directory \"\") => \"./\". | |
| 517 */ | |
| 444 | 518 (filename)) |
| 428 | 519 { |
| 442 | 520 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 521 Ibyte *buf; |
| 428 | 522 Lisp_Object handler; |
| 523 | |
| 444 | 524 CHECK_STRING (filename); |
| 428 | 525 |
| 526 /* If the file name has special constructs in it, | |
| 527 call the corresponding file handler. */ | |
| 444 | 528 handler = Ffind_file_name_handler (filename, Qfile_name_as_directory); |
| 428 | 529 if (!NILP (handler)) |
| 444 | 530 return call2_check_string (handler, Qfile_name_as_directory, filename); |
| 531 | |
| 867 | 532 buf = alloca_ibytes (XSTRING_LENGTH (filename) + 10); |
| 2526 | 533 file_name_as_directory (buf, XSTRING_DATA (filename)); |
| 534 if (qxestrcmp (buf, XSTRING_DATA (filename))) | |
|
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4952
diff
changeset
|
535 return build_istring (buf); |
| 2526 | 536 else |
| 537 return filename; | |
| 428 | 538 } |
| 539 | |
| 540 /* | |
| 541 * Convert from directory name to filename. | |
| 542 * On UNIX, it's simple: just make sure there isn't a terminating / | |
| 543 * | |
| 544 * Value is nonzero if the string output is different from the input. | |
| 545 */ | |
| 546 | |
| 547 static int | |
| 867 | 548 directory_file_name (const Ibyte *src, Ibyte *dst) |
| 428 | 549 { |
| 442 | 550 /* This function cannot GC */ |
| 771 | 551 long slen = qxestrlen (src); |
| 428 | 552 /* Process as Unix format: just remove any final slash. |
| 553 But leave "/" unchanged; do not change it to "". */ | |
| 771 | 554 qxestrcpy (dst, src); |
| 428 | 555 if (slen > 1 |
| 556 && IS_DIRECTORY_SEP (dst[slen - 1]) | |
| 657 | 557 #ifdef WIN32_FILENAMES |
| 428 | 558 && !IS_ANY_SEP (dst[slen - 2]) |
| 657 | 559 #endif /* WIN32_FILENAMES */ |
| 428 | 560 ) |
| 561 dst[slen - 1] = 0; | |
| 562 return 1; | |
| 563 } | |
| 564 | |
| 565 DEFUN ("directory-file-name", Fdirectory_file_name, 1, 1, 0, /* | |
| 444 | 566 Return the file name of the directory named DIRECTORY. |
| 567 This is the name of the file that holds the data for the directory. | |
| 428 | 568 This operation exists because a directory is also a file, but its name as |
| 569 a directory is different from its name as a file. | |
| 570 In Unix-syntax, this function just removes the final slash. | |
| 571 */ | |
| 572 (directory)) | |
| 573 { | |
| 442 | 574 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 575 Ibyte *buf; |
| 428 | 576 Lisp_Object handler; |
| 577 | |
| 578 CHECK_STRING (directory); | |
| 579 | |
| 580 #if 0 /* #### WTF? */ | |
| 581 if (NILP (directory)) | |
| 582 return Qnil; | |
| 583 #endif | |
| 584 | |
| 585 /* If the file name has special constructs in it, | |
| 586 call the corresponding file handler. */ | |
| 587 handler = Ffind_file_name_handler (directory, Qdirectory_file_name); | |
| 588 if (!NILP (handler)) | |
| 589 return call2_check_string (handler, Qdirectory_file_name, directory); | |
| 2367 | 590 buf = alloca_ibytes (XSTRING_LENGTH (directory) + 20); |
| 771 | 591 directory_file_name (XSTRING_DATA (directory), buf); |
|
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changeset
|
592 return build_istring (buf); |
| 428 | 593 } |
| 594 | |
| 595 /* Fmake_temp_name used to be a simple wrapper around mktemp(), but it | |
| 596 proved too broken for our purposes (it supported only 26 or 62 | |
| 597 unique names under some implementations). For example, this | |
| 598 arbitrary limit broke generation of Gnus Incoming* files. | |
| 599 | |
| 600 This implementation is better than what one usually finds in libc. | |
| 601 --hniksic */ | |
| 602 | |
| 442 | 603 static unsigned int temp_name_rand; |
| 604 | |
| 428 | 605 DEFUN ("make-temp-name", Fmake_temp_name, 1, 1, 0, /* |
| 442 | 606 Generate a temporary file name starting with PREFIX. |
| 428 | 607 The Emacs process number forms part of the result, so there is no |
| 608 danger of generating a name being used by another process. | |
| 609 | |
| 610 In addition, this function makes an attempt to choose a name that | |
| 611 does not specify an existing file. To make this work, PREFIX should | |
| 4266 | 612 be an absolute file name. |
| 613 | |
| 614 This function is analagous to mktemp(3) under POSIX, and as with it, there | |
| 615 exists a race condition between the test for the existence of the new file | |
|
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616 and its creation. See `make-temp-file' for a function which avoids this |
| 4266 | 617 race condition by specifying the appropriate flags to `write-region'. |
| 428 | 618 */ |
| 619 (prefix)) | |
| 620 { | |
|
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diff
changeset
|
621 static const Ascbyte tbl[64] = |
| 442 | 622 { |
| 428 | 623 'A','B','C','D','E','F','G','H', |
| 624 'I','J','K','L','M','N','O','P', | |
| 625 'Q','R','S','T','U','V','W','X', | |
| 626 'Y','Z','a','b','c','d','e','f', | |
| 627 'g','h','i','j','k','l','m','n', | |
| 628 'o','p','q','r','s','t','u','v', | |
| 629 'w','x','y','z','0','1','2','3', | |
| 442 | 630 '4','5','6','7','8','9','-','_' |
| 631 }; | |
| 428 | 632 |
| 633 Bytecount len; | |
| 867 | 634 Ibyte *p, *data; |
| 844 | 635 Lisp_Object handler; |
| 428 | 636 |
| 637 CHECK_STRING (prefix); | |
| 844 | 638 handler = Ffind_file_name_handler (prefix, Qmake_temp_name); |
| 639 if (!NILP (handler)) | |
| 640 return call2_check_string (handler, Qmake_temp_name, prefix); | |
| 428 | 641 |
| 642 /* I was tempted to apply Fexpand_file_name on PREFIX here, but it's | |
| 643 a bad idea because: | |
| 644 | |
| 645 1) It might change the prefix, so the resulting string might not | |
| 646 begin with PREFIX. This violates the principle of least | |
| 647 surprise. | |
| 648 | |
| 649 2) It breaks under many unforeseeable circumstances, such as with | |
| 650 the code that uses (make-temp-name "") instead of | |
| 651 (make-temp-name "./"). | |
| 652 | |
| 844 | 653 [[ 3) It might yield unexpected (to stat(2)) results in the presence |
| 654 of EFS and file name handlers.]] Now that we check for a handler, | |
| 655 that's less of a concern. --ben */ | |
| 428 | 656 |
| 657 len = XSTRING_LENGTH (prefix); | |
| 867 | 658 data = alloca_ibytes (len + 7); |
| 428 | 659 memcpy (data, XSTRING_DATA (prefix), len); |
| 660 p = data + len; | |
| 771 | 661 p[6] = '\0'; |
| 428 | 662 |
| 663 /* VAL is created by adding 6 characters to PREFIX. The first three | |
| 664 are the PID of this process, in base 64, and the second three are | |
| 442 | 665 a pseudo-random number seeded from process startup time. This |
| 666 ensures 262144 unique file names per PID per PREFIX per machine. */ | |
| 667 | |
| 668 { | |
| 771 | 669 unsigned int pid = (unsigned int) qxe_getpid (); |
| 442 | 670 *p++ = tbl[(pid >> 0) & 63]; |
| 671 *p++ = tbl[(pid >> 6) & 63]; | |
| 672 *p++ = tbl[(pid >> 12) & 63]; | |
| 673 } | |
| 428 | 674 |
| 675 /* Here we try to minimize useless stat'ing when this function is | |
| 676 invoked many times successively with the same PREFIX. We achieve | |
| 442 | 677 this by using a very pseudo-random number generator to generate |
| 678 file names unique to this process, with a very long cycle. */ | |
| 428 | 679 |
| 680 while (1) | |
| 681 { | |
| 682 struct stat ignored; | |
| 442 | 683 |
| 684 p[0] = tbl[(temp_name_rand >> 0) & 63]; | |
| 685 p[1] = tbl[(temp_name_rand >> 6) & 63]; | |
| 686 p[2] = tbl[(temp_name_rand >> 12) & 63]; | |
| 428 | 687 |
| 688 /* Poor man's congruential RN generator. Replace with ++count | |
| 689 for debugging. */ | |
| 442 | 690 temp_name_rand += 25229; |
| 691 temp_name_rand %= 225307; | |
| 428 | 692 |
| 693 QUIT; | |
| 694 | |
| 771 | 695 if (qxe_stat (data, &ignored) < 0) |
| 428 | 696 { |
| 697 /* We want to return only if errno is ENOENT. */ | |
| 698 if (errno == ENOENT) | |
| 771 | 699 return make_string (data, len + 6); |
| 428 | 700 |
| 701 /* The error here is dubious, but there is little else we | |
| 702 can do. The alternatives are to return nil, which is | |
| 703 as bad as (and in many cases worse than) throwing the | |
| 704 error, or to ignore the error, which will likely result | |
| 705 in inflooping. */ | |
| 706 report_file_error ("Cannot create temporary name for prefix", | |
| 563 | 707 prefix); |
| 428 | 708 return Qnil; /* not reached */ |
| 709 } | |
| 710 } | |
| 711 } | |
| 712 | |
| 713 | |
| 771 | 714 |
| 428 | 715 DEFUN ("expand-file-name", Fexpand_file_name, 1, 2, 0, /* |
| 716 Convert filename NAME to absolute, and canonicalize it. | |
| 717 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
| 718 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing, | |
| 444 | 719 the current buffer's value of `default-directory' is used. |
| 428 | 720 File name components that are `.' are removed, and |
| 721 so are file name components followed by `..', along with the `..' itself; | |
| 722 note that these simplifications are done without checking the resulting | |
| 723 file names in the file system. | |
| 724 An initial `~/' expands to your home directory. | |
| 725 An initial `~USER/' expands to USER's home directory. | |
| 726 See also the function `substitute-in-file-name'. | |
| 727 */ | |
| 728 (name, default_directory)) | |
| 729 { | |
| 771 | 730 /* This function can GC. GC-checked 2000-11-18. |
| 731 This function synched with Emacs 21.0.103. */ | |
| 867 | 732 Ibyte *nm; |
| 733 | |
| 734 Ibyte *newdir, *p, *o; | |
| 428 | 735 int tlen; |
| 867 | 736 Ibyte *target; |
| 657 | 737 #ifdef WIN32_FILENAMES |
| 428 | 738 int drive = 0; |
| 739 int collapse_newdir = 1; | |
| 771 | 740 /* XEmacs note: This concerns the special '/:' syntax for preventing |
| 741 wildcards and such. We don't support this currently but I'm | |
| 742 keeping the code here in case we do. */ | |
| 743 int is_escaped = 0; | |
| 657 | 744 #endif |
| 745 #ifndef WIN32_NATIVE | |
| 428 | 746 struct passwd *pw; |
| 771 | 747 #endif |
| 428 | 748 int length; |
| 446 | 749 Lisp_Object handler = Qnil; |
| 750 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2526 | 751 PROFILE_DECLARE (); |
| 752 | |
| 753 PROFILE_RECORD_ENTERING_SECTION (QSin_expand_file_name); | |
| 442 | 754 |
| 755 /* both of these get set below */ | |
| 446 | 756 GCPRO3 (name, default_directory, handler); |
| 428 | 757 |
| 758 CHECK_STRING (name); | |
| 759 | |
| 760 /* If the file name has special constructs in it, | |
| 761 call the corresponding file handler. */ | |
| 762 handler = Ffind_file_name_handler (name, Qexpand_file_name); | |
| 763 if (!NILP (handler)) | |
| 2526 | 764 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 765 call3_check_string | |
| 766 (handler, Qexpand_file_name, | |
| 767 name, default_directory)); | |
| 428 | 768 |
| 769 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ | |
| 770 if (NILP (default_directory)) | |
| 771 default_directory = current_buffer->directory; | |
| 772 if (! STRINGP (default_directory)) | |
|
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diff
changeset
|
773 default_directory = build_ascstring (DEFAULT_DIRECTORY_FALLBACK); |
| 428 | 774 |
| 775 if (!NILP (default_directory)) | |
| 776 { | |
| 777 handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); | |
| 778 if (!NILP (handler)) | |
| 2526 | 779 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
|
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parents:
4824
diff
changeset
|
780 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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changeset
|
781 (handler, Qexpand_file_name, |
|
780bb5441c14
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changeset
|
782 name, default_directory)); |
| 428 | 783 } |
| 784 | |
| 785 o = XSTRING_DATA (default_directory); | |
| 786 | |
| 787 /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
| 788 It would be better to do this down below where we actually use | |
| 789 default_directory. Unfortunately, calling Fexpand_file_name recursively | |
| 790 could invoke GC, and the strings might be relocated. This would | |
| 791 be annoying because we have pointers into strings lying around | |
| 792 that would need adjusting, and people would add new pointers to | |
| 793 the code and forget to adjust them, resulting in intermittent bugs. | |
| 794 Putting this call here avoids all that crud. | |
| 795 | |
| 796 The EQ test avoids infinite recursion. */ | |
| 797 if (! NILP (default_directory) && !EQ (default_directory, name) | |
| 798 /* Save time in some common cases - as long as default_directory | |
| 799 is not relative, it can be canonicalized with name below (if it | |
| 800 is needed at all) without requiring it to be expanded now. */ | |
| 657 | 801 #ifdef WIN32_FILENAMES |
| 442 | 802 /* Detect Windows file names with drive specifiers. */ |
| 428 | 803 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2]))) |
| 804 /* Detect Windows file names in UNC format. */ | |
| 805 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
| 657 | 806 #endif /* not WIN32_FILENAMES */ |
| 807 #ifndef WIN32_NATIVE | |
| 428 | 808 /* Detect Unix absolute file names (/... alone is not absolute on |
| 442 | 809 Windows). */ |
| 428 | 810 && ! (IS_DIRECTORY_SEP (o[0])) |
| 442 | 811 #endif /* not WIN32_NATIVE */ |
| 428 | 812 ) |
| 442 | 813 |
| 814 default_directory = Fexpand_file_name (default_directory, Qnil); | |
| 428 | 815 |
| 816 #ifdef FILE_SYSTEM_CASE | |
| 817 name = FILE_SYSTEM_CASE (name); | |
| 818 #endif | |
| 819 | |
| 820 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing | |
| 821 into name should be safe during all of this, though. */ | |
| 822 nm = XSTRING_DATA (name); | |
| 823 | |
| 657 | 824 #ifdef WIN32_FILENAMES |
| 428 | 825 /* We will force directory separators to be either all \ or /, so make |
| 826 a local copy to modify, even if there ends up being no change. */ | |
| 867 | 827 nm = qxestrcpy (alloca_ibytes (qxestrlen (nm) + 1), nm); |
| 771 | 828 |
| 829 /* Note if special escape prefix is present, but remove for now. */ | |
| 830 if (nm[0] == '/' && nm[1] == ':') | |
| 831 { | |
| 832 is_escaped = 1; | |
| 833 nm += 2; | |
| 834 } | |
| 428 | 835 |
| 836 /* Find and remove drive specifier if present; this makes nm absolute | |
| 837 even if the rest of the name appears to be relative. */ | |
| 838 { | |
| 867 | 839 Ibyte *colon = qxestrrchr (nm, ':'); |
| 428 | 840 |
| 841 if (colon) | |
| 657 | 842 { |
| 428 | 843 /* Only recognize colon as part of drive specifier if there is a |
| 844 single alphabetic character preceding the colon (and if the | |
| 845 character before the drive letter, if present, is a directory | |
| 846 separator); this is to support the remote system syntax used by | |
| 847 ange-ftp, and the "po:username" syntax for POP mailboxes. */ | |
| 848 look_again: | |
| 849 if (nm == colon) | |
| 850 nm++; | |
| 851 else if (IS_DRIVE (colon[-1]) | |
| 852 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2]))) | |
| 853 { | |
| 854 drive = colon[-1]; | |
| 855 nm = colon + 1; | |
| 856 } | |
| 857 else | |
| 858 { | |
| 859 while (--colon >= nm) | |
| 860 if (colon[0] == ':') | |
| 861 goto look_again; | |
| 862 } | |
| 657 | 863 } |
| 428 | 864 } |
| 865 | |
| 866 /* If we see "c://somedir", we want to strip the first slash after the | |
| 867 colon when stripping the drive letter. Otherwise, this expands to | |
| 868 "//somedir". */ | |
| 869 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 870 nm++; | |
| 657 | 871 #endif /* WIN32_FILENAMES */ |
| 428 | 872 |
| 771 | 873 #ifdef WIN32_FILENAMES |
| 874 /* Discard any previous drive specifier if nm is now in UNC format. */ | |
| 875 if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 876 { | |
| 877 drive = 0; | |
| 878 } | |
| 879 #endif | |
| 880 | |
| 428 | 881 /* If nm is absolute, look for /./ or /../ sequences; if none are |
| 882 found, we can probably return right away. We will avoid allocating | |
| 883 a new string if name is already fully expanded. */ | |
| 884 if ( | |
| 885 IS_DIRECTORY_SEP (nm[0]) | |
| 442 | 886 #ifdef WIN32_NATIVE |
| 771 | 887 && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
| 428 | 888 #endif |
| 889 ) | |
| 890 { | |
| 891 /* If it turns out that the filename we want to return is just a | |
| 892 suffix of FILENAME, we don't need to go through and edit | |
| 893 things; we just need to construct a new string using data | |
| 894 starting at the middle of FILENAME. If we set lose to a | |
| 895 non-zero value, that means we've discovered that we can't do | |
| 896 that cool trick. */ | |
| 897 int lose = 0; | |
| 898 | |
| 899 p = nm; | |
| 900 while (*p) | |
| 901 { | |
| 902 /* Since we know the name is absolute, we can assume that each | |
| 903 element starts with a "/". */ | |
| 904 | |
| 905 /* "." and ".." are hairy. */ | |
| 906 if (IS_DIRECTORY_SEP (p[0]) | |
| 907 && p[1] == '.' | |
| 908 && (IS_DIRECTORY_SEP (p[2]) | |
| 909 || p[2] == 0 | |
| 910 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) | |
| 911 || p[3] == 0)))) | |
| 912 lose = 1; | |
| 771 | 913 /* We want to replace multiple `/' in a row with a single |
| 914 slash. */ | |
| 915 else if (p > nm | |
| 916 && IS_DIRECTORY_SEP (p[0]) | |
| 917 && IS_DIRECTORY_SEP (p[1])) | |
| 918 lose = 1; | |
| 428 | 919 p++; |
| 920 } | |
| 921 if (!lose) | |
| 922 { | |
| 657 | 923 #ifdef WIN32_FILENAMES |
| 924 if (drive || IS_DIRECTORY_SEP (nm[1])) | |
| 428 | 925 { |
| 867 | 926 Ibyte *newnm; |
| 771 | 927 |
| 657 | 928 if (IS_DIRECTORY_SEP (nm[1])) |
| 929 { | |
| 771 | 930 newnm = mswindows_canonicalize_filename (nm); |
| 931 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
|
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4952
diff
changeset
|
932 name = build_istring (newnm); |
| 657 | 933 } |
| 771 | 934 else |
| 657 | 935 { |
| 771 | 936 /* drive must be set, so this is okay */ |
| 937 newnm = mswindows_canonicalize_filename (nm - 2); | |
| 938 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 939 { | |
|
4953
304aebb79cd3
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
940 name = build_istring (newnm); |
| 771 | 941 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive); |
| 942 XSTRING_DATA (name)[1] = ':'; | |
| 943 } | |
| 657 | 944 } |
|
4976
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Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
945 xfree (newnm); |
| 2526 | 946 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 428 | 947 } |
| 771 | 948 #endif /* WIN32_FILENAMES */ |
| 657 | 949 #ifndef WIN32_NATIVE |
| 428 | 950 if (nm == XSTRING_DATA (name)) |
| 2526 | 951 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 952 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, | |
|
4953
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parents:
4952
diff
changeset
|
953 build_istring (nm)); |
| 442 | 954 #endif /* not WIN32_NATIVE */ |
| 428 | 955 } |
| 956 } | |
| 957 | |
| 958 /* At this point, nm might or might not be an absolute file name. We | |
| 959 need to expand ~ or ~user if present, otherwise prefix nm with | |
| 960 default_directory if nm is not absolute, and finally collapse /./ | |
| 961 and /foo/../ sequences. | |
| 962 | |
| 963 We set newdir to be the appropriate prefix if one is needed: | |
| 964 - the relevant user directory if nm starts with ~ or ~user | |
| 965 - the specified drive's working dir (DOS/NT only) if nm does not | |
| 966 start with / | |
| 967 - the value of default_directory. | |
| 968 | |
| 969 Note that these prefixes are not guaranteed to be absolute (except | |
| 970 for the working dir of a drive). Therefore, to ensure we always | |
| 971 return an absolute name, if the final prefix is not absolute we | |
| 972 append it to the current working directory. */ | |
| 973 | |
| 974 newdir = 0; | |
| 975 | |
| 976 if (nm[0] == '~') /* prefix ~ */ | |
| 977 { | |
| 978 if (IS_DIRECTORY_SEP (nm[1]) | |
| 979 || nm[1] == 0) /* ~ by itself */ | |
| 980 { | |
| 867 | 981 Ibyte *homedir = get_home_directory (); |
| 771 | 982 |
| 983 if (!homedir) | |
| 867 | 984 newdir = (Ibyte *) ""; |
| 428 | 985 else |
| 771 | 986 newdir = homedir; |
| 428 | 987 |
| 988 nm++; | |
| 657 | 989 #ifdef WIN32_FILENAMES |
| 428 | 990 collapse_newdir = 0; |
| 991 #endif | |
| 992 } | |
| 993 else /* ~user/filename */ | |
| 994 { | |
| 995 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++) | |
| 996 DO_NOTHING; | |
| 2367 | 997 o = alloca_ibytes (p - nm + 1); |
| 771 | 998 memcpy (o, nm, p - nm); |
| 428 | 999 o [p - nm] = 0; |
| 1000 | |
| 558 | 1001 /* #### While NT is single-user (for the moment) you still |
| 1002 can have multiple user profiles users defined, each with | |
| 1003 its HOME. So maybe possibly we should think about handling | |
| 1004 ~user. --ben */ | |
| 1005 #ifndef WIN32_NATIVE | |
| 442 | 1006 #ifdef CYGWIN |
| 771 | 1007 { |
| 867 | 1008 Ibyte *user; |
| 771 | 1009 |
| 1010 if ((user = user_login_name (NULL)) != NULL) | |
| 1011 { | |
| 1012 /* Does the user login name match the ~name? */ | |
| 1013 if (qxestrcmp (user, o + 1) == 0) | |
| 1014 { | |
| 1015 newdir = get_home_directory (); | |
| 1016 nm = p; | |
| 1017 } | |
| 1018 } | |
| 1019 } | |
| 1020 if (!newdir) | |
| 428 | 1021 { |
| 442 | 1022 #endif /* CYGWIN */ |
| 428 | 1023 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM |
| 1024 occurring in it. (It can call select()). */ | |
| 1025 slow_down_interrupts (); | |
| 771 | 1026 pw = (struct passwd *) qxe_getpwnam (o + 1); |
| 428 | 1027 speed_up_interrupts (); |
| 1028 if (pw) | |
| 1029 { | |
| 867 | 1030 newdir = (Ibyte *) pw->pw_dir; |
| 428 | 1031 nm = p; |
| 771 | 1032 /* FSF: if WIN32_NATIVE, collapse_newdir = 0; |
| 1033 not possible here. */ | |
| 428 | 1034 } |
| 442 | 1035 #ifdef CYGWIN |
| 428 | 1036 } |
| 1037 #endif | |
| 442 | 1038 #endif /* not WIN32_NATIVE */ |
| 428 | 1039 |
| 1040 /* If we don't find a user of that name, leave the name | |
| 1041 unchanged; don't move nm forward to p. */ | |
| 1042 } | |
| 1043 } | |
| 1044 | |
| 657 | 1045 #ifdef WIN32_FILENAMES |
| 428 | 1046 /* On DOS and Windows, nm is absolute if a drive name was specified; |
| 1047 use the drive's current directory as the prefix if needed. */ | |
| 1048 if (!newdir && drive) | |
| 1049 { | |
| 657 | 1050 #ifdef WIN32_NATIVE |
| 428 | 1051 /* Get default directory if needed to make nm absolute. */ |
| 1052 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1053 { | |
| 867 | 1054 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1055 if (newcwd) |
| 1056 { | |
| 867 | 1057 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
|
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diff
changeset
|
1058 xfree (newcwd); |
| 771 | 1059 } |
| 1060 else | |
| 428 | 1061 newdir = NULL; |
| 1062 } | |
| 657 | 1063 #endif /* WIN32_NATIVE */ |
| 428 | 1064 if (!newdir) |
| 1065 { | |
| 1066 /* Either nm starts with /, or drive isn't mounted. */ | |
| 2367 | 1067 newdir = alloca_ibytes (4); |
| 428 | 1068 newdir[0] = DRIVE_LETTER (drive); |
| 1069 newdir[1] = ':'; | |
| 1070 newdir[2] = '/'; | |
| 1071 newdir[3] = 0; | |
| 1072 } | |
| 1073 } | |
| 657 | 1074 #endif /* WIN32_FILENAMES */ |
| 428 | 1075 |
| 1076 /* Finally, if no prefix has been specified and nm is not absolute, | |
| 1077 then it must be expanded relative to default_directory. */ | |
| 1078 | |
| 1079 if (1 | |
| 442 | 1080 #ifndef WIN32_NATIVE |
| 428 | 1081 /* /... alone is not absolute on DOS and Windows. */ |
| 1082 && !IS_DIRECTORY_SEP (nm[0]) | |
| 657 | 1083 #endif |
| 1084 #ifdef WIN32_FILENAMES | |
| 428 | 1085 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 1086 #endif | |
| 1087 && !newdir) | |
| 1088 { | |
| 1089 newdir = XSTRING_DATA (default_directory); | |
| 771 | 1090 #ifdef WIN32_FILENAMES |
| 1091 /* Note if special escape prefix is present, but remove for now. */ | |
| 1092 if (newdir[0] == '/' && newdir[1] == ':') | |
| 1093 { | |
| 1094 is_escaped = 1; | |
| 1095 newdir += 2; | |
| 1096 } | |
| 1097 #endif | |
| 428 | 1098 } |
| 1099 | |
| 657 | 1100 #ifdef WIN32_FILENAMES |
| 428 | 1101 if (newdir) |
| 1102 { | |
| 1103 /* First ensure newdir is an absolute name. */ | |
| 1104 if ( | |
| 442 | 1105 /* Detect Windows file names with drive specifiers. */ |
| 428 | 1106 ! (IS_DRIVE (newdir[0]) |
| 1107 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
| 1108 /* Detect Windows file names in UNC format. */ | |
| 1109 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 771 | 1110 /* XEmacs: added these two lines: Detect drive spec by itself */ |
| 428 | 1111 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0) |
| 657 | 1112 /* Detect unix format. */ |
| 1113 #ifndef WIN32_NATIVE | |
| 1114 && ! (IS_DIRECTORY_SEP (newdir[0])) | |
| 1115 #endif | |
| 428 | 1116 ) |
| 1117 { | |
| 1118 /* Effectively, let newdir be (expand-file-name newdir cwd). | |
| 1119 Because of the admonition against calling expand-file-name | |
| 1120 when we have pointers into lisp strings, we accomplish this | |
| 1121 indirectly by prepending newdir to nm if necessary, and using | |
| 1122 cwd (or the wd of newdir's drive) as the new newdir. */ | |
| 1123 | |
| 1124 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1125 { | |
| 1126 drive = newdir[0]; | |
| 1127 newdir += 2; | |
| 1128 } | |
| 1129 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1130 { | |
| 2367 | 1131 Ibyte *tmp = alloca_ibytes (qxestrlen (newdir) + |
| 1132 qxestrlen (nm) + 2); | |
| 771 | 1133 file_name_as_directory (tmp, newdir); |
| 1134 qxestrcat (tmp, nm); | |
| 428 | 1135 nm = tmp; |
| 1136 } | |
| 1137 if (drive) | |
| 1138 { | |
| 657 | 1139 #ifdef WIN32_NATIVE |
| 867 | 1140 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1141 if (newcwd) |
| 1142 { | |
| 867 | 1143 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
|
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diff
changeset
|
1144 xfree (newcwd); |
| 771 | 1145 } |
| 1146 else | |
| 657 | 1147 #endif |
| 867 | 1148 IBYTE_STRING_TO_ALLOCA ((Ibyte *) "/", newdir); |
| 428 | 1149 } |
| 1150 else | |
| 867 | 1151 IBYTE_STRING_TO_ALLOCA (get_initial_directory (0, 0), newdir); |
| 428 | 1152 } |
| 1153 | |
| 1154 /* Strip off drive name from prefix, if present. */ | |
| 1155 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1156 { | |
| 1157 drive = newdir[0]; | |
| 1158 newdir += 2; | |
| 1159 } | |
| 1160 | |
| 1161 /* Keep only a prefix from newdir if nm starts with slash | |
| 771 | 1162 (//server/share for UNC, nothing otherwise). */ |
| 657 | 1163 if (IS_DIRECTORY_SEP (nm[0]) |
| 1164 #ifndef WIN32_NATIVE | |
| 1165 && IS_DIRECTORY_SEP (nm[1]) | |
| 1166 #endif | |
| 1167 && collapse_newdir) | |
| 428 | 1168 { |
| 1169 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 1170 { | |
| 2367 | 1171 /* !!#### Use ei API */ |
| 1172 newdir = qxestrcpy (alloca_ibytes (qxestrlen (newdir) + 1), | |
| 1173 newdir); | |
| 428 | 1174 p = newdir + 2; |
| 1175 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1176 p++; | |
| 1177 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1178 *p = 0; | |
| 1179 } | |
| 1180 else | |
| 867 | 1181 newdir = (Ibyte *) ""; |
| 428 | 1182 } |
| 1183 } | |
| 657 | 1184 #endif /* WIN32_FILENAMES */ |
| 428 | 1185 |
| 1186 if (newdir) | |
| 1187 { | |
| 1188 /* Get rid of any slash at the end of newdir, unless newdir is | |
| 771 | 1189 just / or // (an incomplete UNC name). */ |
| 1190 length = qxestrlen (newdir); | |
| 428 | 1191 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
| 657 | 1192 #ifdef WIN32_FILENAMES |
| 428 | 1193 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) |
| 1194 #endif | |
| 1195 ) | |
| 1196 { | |
| 2367 | 1197 Ibyte *temp = alloca_ibytes (length); |
| 428 | 1198 memcpy (temp, newdir, length - 1); |
| 1199 temp[length - 1] = 0; | |
| 1200 newdir = temp; | |
| 1201 } | |
| 1202 tlen = length + 1; | |
| 1203 } | |
| 1204 else | |
| 1205 tlen = 0; | |
| 1206 | |
| 1207 /* Now concatenate the directory and name to new space in the stack frame */ | |
| 771 | 1208 tlen += qxestrlen (nm) + 1; |
| 657 | 1209 #ifdef WIN32_FILENAMES |
| 771 | 1210 /* Reserve space for drive specifier and escape prefix, since either |
| 1211 or both may need to be inserted. (The Microsoft x86 compiler | |
| 428 | 1212 produces incorrect code if the following two lines are combined.) */ |
| 2367 | 1213 target = alloca_ibytes (tlen + 4); |
| 771 | 1214 target += 4; |
| 657 | 1215 #else /* not WIN32_FILENAMES */ |
| 2367 | 1216 target = alloca_ibytes (tlen); |
| 657 | 1217 #endif /* not WIN32_FILENAMES */ |
| 428 | 1218 *target = 0; |
| 1219 | |
| 1220 if (newdir) | |
| 1221 { | |
| 1222 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) | |
| 771 | 1223 { |
| 1224 #ifdef WIN32_FILENAMES | |
| 1225 /* If newdir is effectively "C:/", then the drive letter will have | |
| 1226 been stripped and newdir will be "/". Concatenating with an | |
| 1227 absolute directory in nm produces "//", which will then be | |
| 1228 incorrectly treated as a network share. Ignore newdir in | |
| 1229 this case (keeping the drive letter). */ | |
| 1230 if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) | |
| 1231 && newdir[1] == '\0')) | |
| 1232 #endif | |
| 1233 qxestrcpy (target, newdir); | |
| 1234 } | |
| 428 | 1235 else |
| 771 | 1236 file_name_as_directory (target, newdir); |
| 428 | 1237 } |
| 1238 | |
| 771 | 1239 qxestrcat (target, nm); |
| 428 | 1240 |
| 1241 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ | |
| 1242 | |
| 771 | 1243 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
| 1244 appear. */ | |
| 428 | 1245 |
| 1246 p = target; | |
| 1247 o = target; | |
| 1248 | |
| 1249 while (*p) | |
| 1250 { | |
| 1251 if (!IS_DIRECTORY_SEP (*p)) | |
| 1252 { | |
| 1253 *o++ = *p++; | |
| 1254 } | |
| 1255 else if (IS_DIRECTORY_SEP (p[0]) | |
| 1256 && p[1] == '.' | |
| 1257 && (IS_DIRECTORY_SEP (p[2]) | |
| 1258 || p[2] == 0)) | |
| 1259 { | |
| 1260 /* If "/." is the entire filename, keep the "/". Otherwise, | |
| 1261 just delete the whole "/.". */ | |
| 1262 if (o == target && p[2] == '\0') | |
| 1263 *o++ = *p; | |
| 1264 p += 2; | |
| 1265 } | |
| 1266 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.' | |
| 1267 /* `/../' is the "superroot" on certain file systems. */ | |
| 1268 && o != target | |
| 1269 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) | |
| 1270 { | |
| 1271 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) | |
| 1272 ; | |
| 1273 /* Keep initial / only if this is the whole name. */ | |
| 1274 if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
| 1275 ++o; | |
| 1276 p += 3; | |
| 1277 } | |
| 771 | 1278 else if (p > target |
| 1279 && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1280 { | |
| 1281 /* Collapse multiple `/' in a row. */ | |
| 1282 *o++ = *p++; | |
| 1283 while (IS_DIRECTORY_SEP (*p)) | |
| 1284 ++p; | |
| 1285 } | |
| 428 | 1286 else |
| 1287 { | |
| 1288 *o++ = *p++; | |
| 1289 } | |
| 1290 } | |
| 1291 | |
| 657 | 1292 #ifdef WIN32_FILENAMES |
| 428 | 1293 /* At last, set drive name, except for network file name. */ |
| 1294 if (drive) | |
| 1295 { | |
| 1296 target -= 2; | |
| 1297 target[0] = DRIVE_LETTER (drive); | |
| 1298 target[1] = ':'; | |
| 1299 } | |
| 657 | 1300 #ifdef WIN32_NATIVE |
| 428 | 1301 else |
| 1302 { | |
| 1303 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1])); | |
| 1304 } | |
| 657 | 1305 #endif |
| 771 | 1306 /* Reinsert the escape prefix if required. */ |
| 1307 if (is_escaped) | |
| 1308 { | |
| 1309 target -= 2; | |
| 1310 target[0] = '/'; | |
| 1311 target[1] = ':'; | |
| 1312 } | |
| 1313 | |
| 1314 *o = '\0'; | |
| 1315 | |
| 1316 { | |
| 867 | 1317 Ibyte *newtarget = mswindows_canonicalize_filename (target); |
|
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diff
changeset
|
1318 Lisp_Object result = build_istring (newtarget); |
|
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Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
1319 xfree (newtarget); |
| 771 | 1320 |
| 2526 | 1321 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, result); |
| 771 | 1322 } |
| 1323 #else /* not WIN32_FILENAMES */ | |
| 2526 | 1324 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 1325 make_string (target, o - target)); | |
| 771 | 1326 #endif /* not WIN32_FILENAMES */ |
| 428 | 1327 } |
| 1328 | |
| 1329 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /* | |
| 444 | 1330 Return the canonical name of FILENAME. |
| 1331 Second arg DEFAULT is directory to start with if FILENAME is relative | |
| 428 | 1332 (does not start with slash); if DEFAULT is nil or missing, |
| 444 | 1333 the current buffer's value of `default-directory' is used. |
| 428 | 1334 No component of the resulting pathname will be a symbolic link, as |
| 1335 in the realpath() function. | |
| 1336 */ | |
| 1337 (filename, default_)) | |
| 1338 { | |
| 442 | 1339 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 428 | 1340 Lisp_Object expanded_name; |
| 1341 struct gcpro gcpro1; | |
| 1342 | |
| 1343 CHECK_STRING (filename); | |
| 1344 | |
| 1345 expanded_name = Fexpand_file_name (filename, default_); | |
| 1346 | |
| 1347 if (!STRINGP (expanded_name)) | |
| 1348 return Qnil; | |
| 1349 | |
| 1350 GCPRO1 (expanded_name); | |
| 442 | 1351 |
| 1352 { | |
| 1353 Lisp_Object handler = | |
| 1354 Ffind_file_name_handler (expanded_name, Qfile_truename); | |
| 1355 | |
| 1356 if (!NILP (handler)) | |
| 1357 RETURN_UNGCPRO | |
| 1358 (call2_check_string (handler, Qfile_truename, expanded_name)); | |
| 1359 } | |
| 428 | 1360 |
| 1361 { | |
| 2421 | 1362 Ibyte resolved_path[PATH_MAX_INTERNAL]; |
| 771 | 1363 Bytecount elen = XSTRING_LENGTH (expanded_name); |
| 867 | 1364 Ibyte *path; |
| 1365 Ibyte *p; | |
| 771 | 1366 |
| 1367 LISP_STRING_TO_ALLOCA (expanded_name, path); | |
| 988 | 1368 |
| 1111 | 1369 #if defined (WIN32_FILENAMES) && defined (CYGWIN) |
| 988 | 1370 /* When using win32 filenames in cygwin we want file-truename to |
| 1371 detect that c:/windows == /windows for example. */ | |
| 1111 | 1372 if (! (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))) |
| 1373 { | |
|
4834
b3ea9c582280
Use new cygwin_conv_path API with Cygwin 1.7 for converting names between Win32 and POSIX, UTF-8-aware, with attendant changes elsewhere
Ben Wing <ben@xemacs.org>
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4826
diff
changeset
|
1374 LOCAL_FILE_FORMAT_TO_INTERNAL_MSWIN (path, p); |
| 1111 | 1375 path = p; |
| 1376 } | |
| 988 | 1377 #endif |
| 428 | 1378 p = path; |
| 442 | 1379 |
| 428 | 1380 /* Try doing it all at once. */ |
| 2526 | 1381 if (!qxe_realpath (path, resolved_path, 0)) |
| 428 | 1382 { |
| 1383 /* Didn't resolve it -- have to do it one component at a time. */ | |
| 1384 /* "realpath" is a typically useless, stupid un*x piece of crap. | |
| 1385 It claims to return a useful value in the "error" case, but since | |
| 1386 there is no indication provided of how far along the pathname | |
| 1387 the function went before erring, there is no way to use the | |
| 442 | 1388 partial result returned. What a piece of junk. |
| 1389 | |
| 1390 The above comment refers to historical versions of | |
| 1391 realpath(). The Unix98 specs state: | |
| 1392 | |
| 1393 "On successful completion, realpath() returns a | |
| 1394 pointer to the resolved name. Otherwise, realpath() | |
| 1395 returns a null pointer and sets errno to indicate the | |
| 1396 error, and the contents of the buffer pointed to by | |
| 1397 resolved_name are undefined." | |
| 1398 | |
| 771 | 1399 Since we depend on undocumented semantics of various system |
| 2526 | 1400 realpath()s, we just use our own version in realpath.c. |
| 1401 | |
| 1402 Note also that our own version differs in its semantics from any | |
| 1403 standard version, since it accepts and returns internal-format | |
| 1404 text, not external-format. */ | |
| 428 | 1405 for (;;) |
| 1406 { | |
| 867 | 1407 Ibyte *pos; |
| 446 | 1408 |
| 657 | 1409 #ifdef WIN32_FILENAMES |
| 446 | 1410 if (IS_DRIVE (p[0]) && IS_DEVICE_SEP (p[1]) |
| 1411 && IS_DIRECTORY_SEP (p[2])) | |
| 1412 /* don't test c: on windows */ | |
| 1413 p = p+2; | |
| 1414 else if (IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1415 /* start after // */ | |
| 1416 p = p+1; | |
| 1417 #endif | |
| 1418 for (pos = p + 1; pos < path + elen; pos++) | |
| 1419 if (IS_DIRECTORY_SEP (*pos)) | |
| 1420 { | |
| 1421 *(p = pos) = 0; | |
| 1422 break; | |
| 1423 } | |
| 1424 if (p != pos) | |
| 1425 p = 0; | |
| 428 | 1426 |
| 2526 | 1427 if (qxe_realpath (path, resolved_path, 0)) |
| 428 | 1428 { |
| 1429 if (p) | |
| 446 | 1430 *p = DIRECTORY_SEP; |
| 428 | 1431 else |
| 1432 break; | |
| 1433 | |
| 1434 } | |
| 1435 else if (errno == ENOENT || errno == EACCES) | |
| 1436 { | |
| 1437 /* Failed on this component. Just tack on the rest of | |
| 1438 the string and we are done. */ | |
| 771 | 1439 int rlen = qxestrlen (resolved_path); |
| 428 | 1440 |
| 1441 /* "On failure, it returns NULL, sets errno to indicate | |
| 1442 the error, and places in resolved_path the absolute pathname | |
| 1443 of the path component which could not be resolved." */ | |
| 442 | 1444 |
| 1445 if (p) | |
| 428 | 1446 { |
| 1447 int plen = elen - (p - path); | |
| 1448 | |
| 446 | 1449 if (rlen > 1 && IS_DIRECTORY_SEP (resolved_path[rlen - 1])) |
| 428 | 1450 rlen = rlen - 1; |
| 1451 | |
| 1452 if (plen + rlen + 1 > countof (resolved_path)) | |
| 1453 goto toolong; | |
| 1454 | |
| 446 | 1455 resolved_path[rlen] = DIRECTORY_SEP; |
| 428 | 1456 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1); |
| 1457 } | |
| 1458 break; | |
| 1459 } | |
| 1460 else | |
| 1461 goto lose; | |
| 1462 } | |
| 1463 } | |
| 1464 | |
| 1465 { | |
| 442 | 1466 Lisp_Object resolved_name; |
| 771 | 1467 int rlen = qxestrlen (resolved_path); |
| 826 | 1468 if (elen > 0 && IS_DIRECTORY_SEP (string_byte (expanded_name, elen - 1)) |
| 446 | 1469 && !(rlen > 0 && IS_DIRECTORY_SEP (resolved_path[rlen - 1]))) |
| 428 | 1470 { |
| 1471 if (rlen + 1 > countof (resolved_path)) | |
| 1472 goto toolong; | |
| 446 | 1473 resolved_path[rlen++] = DIRECTORY_SEP; |
| 442 | 1474 resolved_path[rlen] = '\0'; |
| 428 | 1475 } |
| 771 | 1476 resolved_name = make_string (resolved_path, rlen); |
| 442 | 1477 RETURN_UNGCPRO (resolved_name); |
| 428 | 1478 } |
| 1479 | |
| 1480 toolong: | |
| 1481 errno = ENAMETOOLONG; | |
| 1482 goto lose; | |
| 1483 lose: | |
| 563 | 1484 report_file_error ("Finding truename", expanded_name); |
| 428 | 1485 } |
| 442 | 1486 RETURN_UNGCPRO (Qnil); |
| 428 | 1487 } |
| 1488 | |
| 1489 | |
| 1490 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /* | |
| 1491 Substitute environment variables referred to in FILENAME. | |
| 1492 `$FOO' where FOO is an environment variable name means to substitute | |
| 1493 the value of that variable. The variable name should be terminated | |
| 444 | 1494 with a character, not a letter, digit or underscore; otherwise, enclose |
| 428 | 1495 the entire variable name in braces. |
| 1496 If `/~' appears, all of FILENAME through that `/' is discarded. | |
| 1497 */ | |
| 444 | 1498 (filename)) |
| 428 | 1499 { |
| 442 | 1500 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 867 | 1501 Ibyte *nm; |
| 1502 | |
|
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1503 Ibyte *s, *p, *o, *x, *endp, *got; |
| 867 | 1504 Ibyte *target = 0; |
| 428 | 1505 int total = 0; |
|
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|
1506 int substituted = 0, seen_braces; |
| 867 | 1507 Ibyte *xnm; |
| 428 | 1508 Lisp_Object handler; |
| 1509 | |
| 444 | 1510 CHECK_STRING (filename); |
| 428 | 1511 |
| 1512 /* If the file name has special constructs in it, | |
| 1513 call the corresponding file handler. */ | |
| 444 | 1514 handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
| 428 | 1515 if (!NILP (handler)) |
| 1516 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name, | |
| 444 | 1517 filename); |
| 1518 | |
| 1519 nm = XSTRING_DATA (filename); | |
| 1520 endp = nm + XSTRING_LENGTH (filename); | |
| 428 | 1521 |
| 1522 /* If /~ or // appears, discard everything through first slash. */ | |
| 1523 | |
| 1524 for (p = nm; p != endp; p++) | |
| 1525 { | |
| 1526 if ((p[0] == '~' | |
| 657 | 1527 #if defined (WIN32_FILENAMES) |
| 440 | 1528 /* // at start of file name is meaningful in WindowsNT systems */ |
| 428 | 1529 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm) |
| 657 | 1530 #else /* not (WIN32_FILENAMES) */ |
| 428 | 1531 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1532 #endif /* not (WIN32_FILENAMES) */ |
| 428 | 1533 ) |
| 1534 && p != nm | |
| 1535 && (IS_DIRECTORY_SEP (p[-1]))) | |
| 1536 { | |
| 1537 nm = p; | |
| 1538 substituted = 1; | |
| 1539 } | |
| 657 | 1540 #ifdef WIN32_FILENAMES |
| 428 | 1541 /* see comment in expand-file-name about drive specifiers */ |
| 1542 else if (IS_DRIVE (p[0]) && p[1] == ':' | |
| 1543 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1544 { | |
| 1545 nm = p; | |
| 1546 substituted = 1; | |
| 1547 } | |
| 657 | 1548 #endif /* WIN32_FILENAMES */ |
| 428 | 1549 } |
| 1550 | |
| 1551 /* See if any variables are substituted into the string | |
| 1552 and find the total length of their values in `total' */ | |
| 1553 | |
| 1554 for (p = nm; p != endp;) | |
| 1555 if (*p != '$') | |
| 1556 p++; | |
| 1557 else | |
| 1558 { | |
| 1559 p++; | |
| 1560 if (p == endp) | |
|
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|
1561 { |
|
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1562 /* No substitution, no error. */ |
|
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1563 break; |
|
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|
1564 } |
| 428 | 1565 else if (*p == '$') |
| 1566 { | |
| 1567 /* "$$" means a single "$" */ | |
| 1568 p++; | |
| 1569 total -= 1; | |
| 1570 substituted = 1; | |
| 1571 continue; | |
| 1572 } | |
| 1573 else if (*p == '{') | |
| 1574 { | |
| 1575 o = ++p; | |
| 1576 while (p != endp && *p != '}') p++; | |
|
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|
1577 if (*p != '}') |
|
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|
1578 { |
|
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|
1579 /* No substitution, no error. Keep looking. */ |
|
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|
1580 p = o; |
|
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|
1581 continue; |
|
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|
1582 } |
| 428 | 1583 s = p; |
| 1584 } | |
| 1585 else | |
| 1586 { | |
| 1587 o = p; | |
| 1588 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1589 s = p; | |
| 1590 } | |
| 1591 | |
| 1592 /* Copy out the variable name */ | |
| 2367 | 1593 target = alloca_ibytes (s - o + 1); |
| 771 | 1594 qxestrncpy (target, o, s - o); |
| 428 | 1595 target[s - o] = 0; |
| 442 | 1596 #ifdef WIN32_NATIVE |
| 1204 | 1597 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1598 #endif /* WIN32_NATIVE */ |
| 428 | 1599 |
| 1600 /* Get variable value */ | |
|
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|
1601 got = egetenv ((CIbyte *) target); |
|
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Don't error on unknown environment variables, #'substitute-in-file-name.
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|
1602 if (got) |
|
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|
1603 { |
|
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|
1604 total += qxestrlen (got); |
|
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|
1605 substituted = 1; |
|
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|
1606 } |
| 428 | 1607 } |
| 1608 | |
| 1609 if (!substituted) | |
| 444 | 1610 return filename; |
| 1611 | |
| 1612 /* If substitution required, recopy the filename and do it */ | |
| 428 | 1613 /* Make space in stack frame for the new copy */ |
| 2367 | 1614 xnm = alloca_ibytes (XSTRING_LENGTH (filename) + total + 1); |
| 428 | 1615 x = xnm; |
| 1616 | |
| 1617 /* Copy the rest of the name through, replacing $ constructs with values */ | |
| 1618 for (p = nm; *p;) | |
| 1619 if (*p != '$') | |
| 1620 *x++ = *p++; | |
| 1621 else | |
| 1622 { | |
| 1623 p++; | |
|
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|
1624 seen_braces = 0; |
| 428 | 1625 if (p == endp) |
|
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|
1626 { |
|
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|
1627 *x++ = '$'; |
|
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|
1628 break; |
|
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|
1629 } |
| 428 | 1630 else if (*p == '$') |
| 1631 { | |
| 1632 *x++ = *p++; | |
| 1633 continue; | |
| 1634 } | |
| 1635 else if (*p == '{') | |
| 1636 { | |
|
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|
1637 seen_braces = 1; |
| 428 | 1638 o = ++p; |
| 1639 while (p != endp && *p != '}') p++; | |
|
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|
1640 if (*p != '}') |
|
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|
1641 { |
|
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|
1642 /* Don't syntax error, don't substitute */ |
|
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|
1643 *x++ = '{'; |
|
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|
1644 p = o; |
|
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|
1645 continue; |
|
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|
1646 } |
| 428 | 1647 s = p++; |
| 1648 } | |
| 1649 else | |
| 1650 { | |
| 1651 o = p; | |
| 1652 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1653 s = p; | |
| 1654 } | |
| 1655 | |
| 1656 /* Copy out the variable name */ | |
| 2367 | 1657 target = alloca_ibytes (s - o + 1); |
| 771 | 1658 qxestrncpy (target, o, s - o); |
| 428 | 1659 target[s - o] = 0; |
| 442 | 1660 #ifdef WIN32_NATIVE |
| 1204 | 1661 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1662 #endif /* WIN32_NATIVE */ |
| 428 | 1663 |
| 1664 /* Get variable value */ | |
|
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|
1665 got = egetenv ((CIbyte *) target); |
|
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|
1666 if (got) |
|
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|
1667 { |
|
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|
1668 qxestrcpy (x, got); |
|
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|
1669 x += qxestrlen (got); |
|
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|
1670 } |
|
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|
1671 else |
|
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|
1672 { |
|
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|
1673 *x++ = '$'; |
|
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|
1674 if (seen_braces) |
|
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|
1675 { |
|
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|
1676 *x++ = '{'; |
|
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|
1677 /* Preserve the original case. */ |
|
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|
1678 qxestrncpy (x, o, s - o); |
|
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|
1679 x += s - o; |
|
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|
1680 *x++ = '}'; |
|
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|
1681 } |
|
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|
1682 else |
|
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|
1683 { |
|
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|
1684 /* Preserve the original case. */ |
|
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|
1685 qxestrncpy (x, o, s - o); |
|
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|
1686 x += s - o; |
|
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|
1687 } |
|
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|
1688 } |
| 428 | 1689 } |
| 1690 | |
| 1691 *x = 0; | |
| 1692 | |
| 1693 /* If /~ or // appears, discard everything through first slash. */ | |
| 1694 | |
| 1695 for (p = xnm; p != x; p++) | |
| 1696 if ((p[0] == '~' | |
| 657 | 1697 #if defined (WIN32_FILENAMES) |
| 428 | 1698 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm) |
| 657 | 1699 #else /* not WIN32_FILENAMES */ |
| 428 | 1700 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1701 #endif /* not WIN32_FILENAMES */ |
| 428 | 1702 ) |
| 1703 /* don't do p[-1] if that would go off the beginning --jwz */ | |
| 1704 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1])) | |
| 1705 xnm = p; | |
| 657 | 1706 #ifdef WIN32_FILENAMES |
| 428 | 1707 else if (IS_DRIVE (p[0]) && p[1] == ':' |
| 1708 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1709 xnm = p; | |
| 1710 #endif | |
| 1711 | |
| 1712 return make_string (xnm, x - xnm); | |
| 1713 } | |
| 1714 | |
| 1715 /* A slightly faster and more convenient way to get | |
| 1716 (directory-file-name (expand-file-name FOO)). */ | |
| 1717 | |
| 1718 Lisp_Object | |
| 1719 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) | |
| 1720 { | |
| 442 | 1721 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1722 Lisp_Object abspath; |
| 1723 struct gcpro gcpro1; | |
| 1724 | |
| 1725 abspath = Fexpand_file_name (filename, defdir); | |
| 1726 GCPRO1 (abspath); | |
| 1727 /* Remove final slash, if any (unless path is root). | |
| 1728 stat behaves differently depending! */ | |
| 1729 if (XSTRING_LENGTH (abspath) > 1 | |
| 826 | 1730 && IS_DIRECTORY_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 1)) |
| 1731 && !IS_DEVICE_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 2))) | |
| 428 | 1732 /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1733 abspath = Fdirectory_file_name (abspath); | |
| 1734 UNGCPRO; | |
| 1735 return abspath; | |
| 1736 } | |
| 1737 | |
| 1738 /* Signal an error if the file ABSNAME already exists. | |
| 1739 If INTERACTIVE is nonzero, ask the user whether to proceed, | |
| 1740 and bypass the error if the user says to go ahead. | |
| 1741 QUERYSTRING is a name for the action that is being considered | |
| 1742 to alter the file. | |
| 1743 *STATPTR is used to store the stat information if the file exists. | |
| 1744 If the file does not exist, STATPTR->st_mode is set to 0. */ | |
| 1745 | |
| 1746 static void | |
|
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|
1747 barf_or_query_if_file_exists (Lisp_Object absname, const Ascbyte *querystring, |
| 428 | 1748 int interactive, struct stat *statptr) |
| 1749 { | |
| 442 | 1750 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1751 struct stat statbuf; |
| 1752 | |
| 1753 /* stat is a good way to tell whether the file exists, | |
| 1754 regardless of what access permissions it has. */ | |
| 771 | 1755 if (qxe_stat (XSTRING_DATA (absname), &statbuf) >= 0) |
| 428 | 1756 { |
| 1757 Lisp_Object tem; | |
| 1758 | |
| 1759 if (interactive) | |
| 1760 { | |
| 1761 Lisp_Object prompt; | |
| 1762 struct gcpro gcpro1; | |
| 1763 | |
| 771 | 1764 prompt = |
| 1765 emacs_sprintf_string | |
|
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|
1766 (GETTEXT ("File %s already exists; %s anyway? "), |
|
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Ben Wing <ben@xemacs.org>
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|
1767 XSTRING_DATA (absname), GETTEXT (querystring)); |
| 428 | 1768 |
| 1769 GCPRO1 (prompt); | |
| 1770 tem = call1 (Qyes_or_no_p, prompt); | |
| 1771 UNGCPRO; | |
| 1772 } | |
| 1773 else | |
| 1774 tem = Qnil; | |
| 1775 | |
| 1776 if (NILP (tem)) | |
| 1777 Fsignal (Qfile_already_exists, | |
| 771 | 1778 list2 (build_msg_string ("File already exists"), |
| 428 | 1779 absname)); |
| 1780 if (statptr) | |
| 1781 *statptr = statbuf; | |
| 1782 } | |
| 1783 else | |
| 1784 { | |
| 1785 if (statptr) | |
| 1786 statptr->st_mode = 0; | |
| 1787 } | |
| 1788 return; | |
| 1789 } | |
| 1790 | |
| 1791 DEFUN ("copy-file", Fcopy_file, 2, 4, | |
| 1792 "fCopy file: \nFCopy %s to file: \np\nP", /* | |
| 444 | 1793 Copy FILENAME to NEWNAME. Both args must be strings. |
| 428 | 1794 Signals a `file-already-exists' error if file NEWNAME already exists, |
| 1795 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil. | |
| 1796 A number as third arg means request confirmation if NEWNAME already exists. | |
| 1797 This is what happens in interactive use with M-x. | |
| 1798 Fourth arg KEEP-TIME non-nil means give the new file the same | |
| 1799 last-modified time as the old one. (This works on only some systems.) | |
| 1800 A prefix arg makes KEEP-TIME non-nil. | |
| 1801 */ | |
| 1802 (filename, newname, ok_if_already_exists, keep_time)) | |
| 1803 { | |
| 442 | 1804 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1805 int ifd, ofd, n; |
|
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
|
1806 Rawbyte buf[16 * 1024]; |
| 428 | 1807 struct stat st, out_st; |
| 1808 Lisp_Object handler; | |
| 1809 int speccount = specpdl_depth (); | |
| 1810 struct gcpro gcpro1, gcpro2; | |
| 1811 /* Lisp_Object args[6]; */ | |
| 1812 int input_file_statable_p; | |
| 1813 | |
| 1814 GCPRO2 (filename, newname); | |
| 1815 CHECK_STRING (filename); | |
| 1816 CHECK_STRING (newname); | |
| 1817 filename = Fexpand_file_name (filename, Qnil); | |
| 1818 newname = Fexpand_file_name (newname, Qnil); | |
| 1819 | |
| 1820 /* If the input file name has special constructs in it, | |
| 1821 call the corresponding file handler. */ | |
| 1822 handler = Ffind_file_name_handler (filename, Qcopy_file); | |
| 1823 /* Likewise for output file name. */ | |
| 1824 if (NILP (handler)) | |
| 1825 handler = Ffind_file_name_handler (newname, Qcopy_file); | |
| 1826 if (!NILP (handler)) | |
| 1827 { | |
| 1828 UNGCPRO; | |
| 1829 return call5 (handler, Qcopy_file, filename, newname, | |
| 1830 ok_if_already_exists, keep_time); | |
| 1831 } | |
| 1832 | |
| 1833 /* When second argument is a directory, copy the file into it. | |
| 1834 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo") | |
| 1835 */ | |
| 1836 if (!NILP (Ffile_directory_p (newname))) | |
| 1837 { | |
| 1838 Lisp_Object args[3]; | |
| 1839 struct gcpro ngcpro1; | |
| 1840 int i = 1; | |
| 1841 | |
| 1842 args[0] = newname; | |
| 1843 args[1] = Qnil; args[2] = Qnil; | |
| 1844 NGCPRO1 (*args); | |
| 1845 ngcpro1.nvars = 3; | |
| 826 | 1846 if (!IS_DIRECTORY_SEP (string_byte (newname, |
| 442 | 1847 XSTRING_LENGTH (newname) - 1))) |
| 1848 | |
| 1849 args[i++] = Fchar_to_string (Vdirectory_sep_char); | |
| 428 | 1850 args[i++] = Ffile_name_nondirectory (filename); |
| 1851 newname = Fconcat (i, args); | |
| 1852 NUNGCPRO; | |
| 1853 } | |
| 1854 | |
| 1855 if (NILP (ok_if_already_exists) | |
| 1856 || INTP (ok_if_already_exists)) | |
| 1857 barf_or_query_if_file_exists (newname, "copy to it", | |
| 1858 INTP (ok_if_already_exists), &out_st); | |
| 771 | 1859 else if (qxe_stat (XSTRING_DATA (newname), &out_st) < 0) |
| 428 | 1860 out_st.st_mode = 0; |
| 1861 | |
| 771 | 1862 ifd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 1863 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 1864 if (ifd < 0) |
| 563 | 1865 report_file_error ("Opening input file", filename); |
| 428 | 1866 |
| 1867 record_unwind_protect (close_file_unwind, make_int (ifd)); | |
| 1868 | |
| 1869 /* We can only copy regular files and symbolic links. Other files are not | |
| 1870 copyable by us. */ | |
| 771 | 1871 input_file_statable_p = (qxe_fstat (ifd, &st) >= 0); |
| 428 | 1872 |
| 442 | 1873 #ifndef WIN32_NATIVE |
| 428 | 1874 if (out_st.st_mode != 0 |
| 1875 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
| 1876 { | |
| 1877 errno = 0; | |
| 1878 report_file_error ("Input and output files are the same", | |
| 563 | 1879 list3 (Qunbound, filename, newname)); |
| 428 | 1880 } |
| 1881 #endif | |
| 1882 | |
| 1883 #if defined (S_ISREG) && defined (S_ISLNK) | |
| 1884 if (input_file_statable_p) | |
| 1885 { | |
| 1886 if (!(S_ISREG (st.st_mode)) | |
| 1887 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */ | |
| 1888 #ifdef S_ISCHR | |
| 1889 && !(S_ISCHR (st.st_mode)) | |
| 1890 #endif | |
| 1891 && !(S_ISLNK (st.st_mode))) | |
| 1892 { | |
| 1893 #if defined (EISDIR) | |
| 1894 /* Get a better looking error message. */ | |
| 1895 errno = EISDIR; | |
| 1896 #endif /* EISDIR */ | |
| 563 | 1897 report_file_error ("Non-regular file", filename); |
| 428 | 1898 } |
| 1899 } | |
| 1900 #endif /* S_ISREG && S_ISLNK */ | |
| 1901 | |
| 771 | 1902 ofd = qxe_open (XSTRING_DATA (newname), |
| 1903 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE); | |
| 428 | 1904 if (ofd < 0) |
| 563 | 1905 report_file_error ("Opening output file", newname); |
| 428 | 1906 |
| 1907 { | |
| 1908 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil); | |
| 1909 | |
| 1910 record_unwind_protect (close_file_unwind, ofd_locative); | |
| 1911 | |
| 1912 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0) | |
| 1913 { | |
| 1914 if (write_allowing_quit (ofd, buf, n) != n) | |
| 563 | 1915 report_file_error ("I/O error", newname); |
| 428 | 1916 } |
| 1917 | |
| 1918 /* Closing the output clobbers the file times on some systems. */ | |
| 771 | 1919 if (retry_close (ofd) < 0) |
| 563 | 1920 report_file_error ("I/O error", newname); |
| 428 | 1921 |
| 1922 if (input_file_statable_p) | |
| 1923 { | |
| 442 | 1924 if (!NILP (keep_time)) |
| 1925 { | |
| 1926 EMACS_TIME atime, mtime; | |
| 1927 EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
| 1928 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
| 592 | 1929 if (set_file_times (newname, atime, mtime)) |
| 1930 report_file_error ("I/O error", list1 (newname)); | |
| 442 | 1931 } |
| 771 | 1932 qxe_chmod (XSTRING_DATA (newname), st.st_mode & 07777); |
| 428 | 1933 } |
| 1934 | |
| 1935 /* We'll close it by hand */ | |
| 1936 XCAR (ofd_locative) = Qnil; | |
| 1937 | |
| 1938 /* Close ifd */ | |
| 771 | 1939 unbind_to (speccount); |
| 428 | 1940 } |
| 1941 | |
| 1942 UNGCPRO; | |
| 1943 return Qnil; | |
| 1944 } | |
| 1945 | |
| 1946 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /* | |
| 1947 Create a directory. One argument, a file name string. | |
| 1948 */ | |
| 1949 (dirname_)) | |
| 1950 { | |
| 1951 /* This function can GC. GC checked 1997.04.06. */ | |
| 1952 Lisp_Object handler; | |
| 1953 struct gcpro gcpro1; | |
| 771 | 1954 DECLARE_EISTRING (dir); |
| 428 | 1955 |
| 1956 CHECK_STRING (dirname_); | |
| 1957 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1958 | |
| 1959 GCPRO1 (dirname_); | |
| 1960 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal); | |
| 1961 UNGCPRO; | |
| 1962 if (!NILP (handler)) | |
| 1963 return (call2 (handler, Qmake_directory_internal, dirname_)); | |
| 1964 | |
| 771 | 1965 eicpy_lstr (dir, dirname_); |
| 1966 if (eigetch_char (dir, eicharlen (dir) - 1) == '/') | |
| 1967 eidel (dir, eilen (dir) - 1, -1, 1, -1); | |
| 1968 | |
| 1969 if (qxe_mkdir (eidata (dir), 0777) != 0) | |
| 563 | 1970 report_file_error ("Creating directory", dirname_); |
| 428 | 1971 |
| 1972 return Qnil; | |
| 1973 } | |
| 1974 | |
| 1975 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /* | |
| 1976 Delete a directory. One argument, a file name or directory name string. | |
| 1977 */ | |
| 1978 (dirname_)) | |
| 1979 { | |
| 1980 /* This function can GC. GC checked 1997.04.06. */ | |
| 1981 Lisp_Object handler; | |
| 1982 struct gcpro gcpro1; | |
| 1983 | |
| 1984 CHECK_STRING (dirname_); | |
| 1985 | |
| 1986 GCPRO1 (dirname_); | |
| 1987 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1988 dirname_ = Fdirectory_file_name (dirname_); | |
| 1989 | |
| 1990 handler = Ffind_file_name_handler (dirname_, Qdelete_directory); | |
| 1991 UNGCPRO; | |
| 1992 if (!NILP (handler)) | |
| 1993 return (call2 (handler, Qdelete_directory, dirname_)); | |
| 1994 | |
| 771 | 1995 if (qxe_rmdir (XSTRING_DATA (dirname_)) != 0) |
| 563 | 1996 report_file_error ("Removing directory", dirname_); |
| 428 | 1997 |
| 1998 return Qnil; | |
| 1999 } | |
| 2000 | |
| 2001 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /* | |
| 442 | 2002 Delete the file named FILENAME (a string). |
| 2003 If FILENAME has multiple names, it continues to exist with the other names. | |
| 428 | 2004 */ |
| 2005 (filename)) | |
| 2006 { | |
| 2007 /* This function can GC. GC checked 1997.04.06. */ | |
| 2008 Lisp_Object handler; | |
| 2009 struct gcpro gcpro1; | |
| 2010 | |
| 2011 CHECK_STRING (filename); | |
| 2012 filename = Fexpand_file_name (filename, Qnil); | |
| 2013 | |
| 2014 GCPRO1 (filename); | |
| 2015 handler = Ffind_file_name_handler (filename, Qdelete_file); | |
| 2016 UNGCPRO; | |
| 2017 if (!NILP (handler)) | |
| 2018 return call2 (handler, Qdelete_file, filename); | |
| 2019 | |
| 771 | 2020 if (0 > qxe_unlink (XSTRING_DATA (filename))) |
| 563 | 2021 report_file_error ("Removing old name", filename); |
| 428 | 2022 return Qnil; |
| 2023 } | |
| 2024 | |
| 2025 static Lisp_Object | |
| 2286 | 2026 internal_delete_file_1 (Lisp_Object UNUSED (ignore), |
| 2027 Lisp_Object UNUSED (ignore2)) | |
| 428 | 2028 { |
| 2029 return Qt; | |
| 2030 } | |
| 2031 | |
| 2032 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
| 2033 | |
| 2034 int | |
| 2035 internal_delete_file (Lisp_Object filename) | |
| 2036 { | |
| 2037 /* This function can GC. GC checked 1997.04.06. */ | |
| 2038 return NILP (condition_case_1 (Qt, Fdelete_file, filename, | |
| 2039 internal_delete_file_1, Qnil)); | |
| 2040 } | |
| 2041 | |
| 2042 DEFUN ("rename-file", Frename_file, 2, 3, | |
| 2043 "fRename file: \nFRename %s to file: \np", /* | |
| 444 | 2044 Rename FILENAME as NEWNAME. Both args must be strings. |
| 2045 If file has names other than FILENAME, it continues to have those names. | |
| 428 | 2046 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2047 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2048 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2049 This is what happens in interactive use with M-x. | |
| 2050 */ | |
| 2051 (filename, newname, ok_if_already_exists)) | |
| 2052 { | |
| 2053 /* This function can GC. GC checked 1997.04.06. */ | |
| 2054 Lisp_Object handler; | |
| 2055 struct gcpro gcpro1, gcpro2; | |
| 2056 | |
| 2057 GCPRO2 (filename, newname); | |
| 2058 CHECK_STRING (filename); | |
| 2059 CHECK_STRING (newname); | |
| 2060 filename = Fexpand_file_name (filename, Qnil); | |
| 2061 newname = Fexpand_file_name (newname, Qnil); | |
| 2062 | |
| 2063 /* If the file name has special constructs in it, | |
| 2064 call the corresponding file handler. */ | |
| 2065 handler = Ffind_file_name_handler (filename, Qrename_file); | |
| 2066 if (NILP (handler)) | |
| 2067 handler = Ffind_file_name_handler (newname, Qrename_file); | |
| 2068 if (!NILP (handler)) | |
| 2069 { | |
| 2070 UNGCPRO; | |
| 2071 return call4 (handler, Qrename_file, | |
| 2072 filename, newname, ok_if_already_exists); | |
| 2073 } | |
| 2074 | |
| 2075 /* When second argument is a directory, rename the file into it. | |
| 2076 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo") | |
| 2077 */ | |
| 2078 if (!NILP (Ffile_directory_p (newname))) | |
| 2079 { | |
| 2080 Lisp_Object args[3]; | |
| 2081 struct gcpro ngcpro1; | |
| 2082 int i = 1; | |
| 2083 | |
| 2084 args[0] = newname; | |
| 2085 args[1] = Qnil; args[2] = Qnil; | |
| 2086 NGCPRO1 (*args); | |
| 2087 ngcpro1.nvars = 3; | |
| 826 | 2088 if (string_byte (newname, XSTRING_LENGTH (newname) - 1) != '/') |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4867
diff
changeset
|
2089 args[i++] = build_ascstring ("/"); |
| 428 | 2090 args[i++] = Ffile_name_nondirectory (filename); |
| 2091 newname = Fconcat (i, args); | |
| 2092 NUNGCPRO; | |
| 2093 } | |
| 2094 | |
| 2095 if (NILP (ok_if_already_exists) | |
| 2096 || INTP (ok_if_already_exists)) | |
| 2097 barf_or_query_if_file_exists (newname, "rename to it", | |
| 2098 INTP (ok_if_already_exists), 0); | |
| 2099 | |
| 442 | 2100 /* We have configure check for rename() and emulate using |
| 2101 link()/unlink() if necessary. */ | |
| 771 | 2102 if (0 > qxe_rename (XSTRING_DATA (filename), XSTRING_DATA (newname))) |
| 428 | 2103 { |
| 2104 if (errno == EXDEV) | |
| 2105 { | |
| 2106 Fcopy_file (filename, newname, | |
| 2107 /* We have already prompted if it was an integer, | |
| 2108 so don't have copy-file prompt again. */ | |
| 2109 (NILP (ok_if_already_exists) ? Qnil : Qt), | |
| 2110 Qt); | |
| 2111 Fdelete_file (filename); | |
| 2112 } | |
| 2113 else | |
| 2114 { | |
| 563 | 2115 report_file_error ("Renaming", list3 (Qunbound, filename, newname)); |
| 428 | 2116 } |
| 2117 } | |
| 2118 UNGCPRO; | |
| 2119 return Qnil; | |
| 2120 } | |
| 2121 | |
| 2122 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3, | |
| 2123 "fAdd name to file: \nFName to add to %s: \np", /* | |
| 444 | 2124 Give FILENAME additional name NEWNAME. Both args must be strings. |
| 428 | 2125 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2126 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2127 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2128 This is what happens in interactive use with M-x. | |
| 2129 */ | |
| 2130 (filename, newname, ok_if_already_exists)) | |
| 2131 { | |
| 2132 /* This function can GC. GC checked 1997.04.06. */ | |
| 2133 Lisp_Object handler; | |
| 2134 struct gcpro gcpro1, gcpro2; | |
| 2135 | |
| 2136 GCPRO2 (filename, newname); | |
| 2137 CHECK_STRING (filename); | |
| 2138 CHECK_STRING (newname); | |
| 2139 filename = Fexpand_file_name (filename, Qnil); | |
| 2140 newname = Fexpand_file_name (newname, Qnil); | |
| 2141 | |
| 2142 /* If the file name has special constructs in it, | |
| 2143 call the corresponding file handler. */ | |
| 2144 handler = Ffind_file_name_handler (filename, Qadd_name_to_file); | |
| 2145 if (!NILP (handler)) | |
| 2146 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2147 newname, ok_if_already_exists)); | |
| 2148 | |
| 2149 /* If the new name has special constructs in it, | |
| 2150 call the corresponding file handler. */ | |
| 2151 handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
| 2152 if (!NILP (handler)) | |
| 2153 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2154 newname, ok_if_already_exists)); | |
| 2155 | |
| 2156 if (NILP (ok_if_already_exists) | |
| 2157 || INTP (ok_if_already_exists)) | |
| 2158 barf_or_query_if_file_exists (newname, "make it a new name", | |
| 2159 INTP (ok_if_already_exists), 0); | |
| 771 | 2160 /* #### Emacs 20.6 contains an implementation of link() in w32.c. |
| 2161 Need to port. */ | |
| 2162 #ifndef HAVE_LINK | |
| 563 | 2163 signal_error_2 (Qunimplemented, "Adding new name", filename, newname); |
| 771 | 2164 #else /* HAVE_LINK */ |
| 2165 qxe_unlink (XSTRING_DATA (newname)); | |
| 2166 if (0 > qxe_link (XSTRING_DATA (filename), XSTRING_DATA (newname))) | |
| 428 | 2167 { |
| 2168 report_file_error ("Adding new name", | |
| 563 | 2169 list3 (Qunbound, filename, newname)); |
| 428 | 2170 } |
| 771 | 2171 #endif /* HAVE_LINK */ |
| 428 | 2172 |
| 2173 UNGCPRO; | |
| 2174 return Qnil; | |
| 2175 } | |
| 2176 | |
| 2177 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3, | |
| 2178 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /* | |
| 2179 Make a symbolic link to FILENAME, named LINKNAME. Both args strings. | |
| 2180 Signals a `file-already-exists' error if a file LINKNAME already exists | |
| 2181 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2182 A number as third arg means request confirmation if LINKNAME already exists. | |
| 2183 This happens for interactive use with M-x. | |
|
4465
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2184 |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2185 On platforms where symbolic links are not available, any file handlers will |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2186 be run, but the check for the existence of LINKNAME will not be done, and |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2187 the symbolic link will not be created. |
| 428 | 2188 */ |
| 2189 (filename, linkname, ok_if_already_exists)) | |
| 2190 { | |
| 2191 /* This function can GC. GC checked 1997.06.04. */ | |
| 442 | 2192 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 428 | 2193 Lisp_Object handler; |
| 2194 struct gcpro gcpro1, gcpro2; | |
| 2195 | |
| 2196 GCPRO2 (filename, linkname); | |
| 2197 CHECK_STRING (filename); | |
| 2198 CHECK_STRING (linkname); | |
| 2199 /* If the link target has a ~, we must expand it to get | |
| 2200 a truly valid file name. Otherwise, do not expand; | |
| 2201 we want to permit links to relative file names. */ | |
| 826 | 2202 if (string_byte (filename, 0) == '~') |
| 428 | 2203 filename = Fexpand_file_name (filename, Qnil); |
| 2204 linkname = Fexpand_file_name (linkname, Qnil); | |
| 2205 | |
| 2206 /* If the file name has special constructs in it, | |
| 2207 call the corresponding file handler. */ | |
| 2208 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); | |
| 2209 if (!NILP (handler)) | |
| 2210 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, | |
| 2211 ok_if_already_exists)); | |
| 2212 | |
| 2213 /* If the new link name has special constructs in it, | |
| 2214 call the corresponding file handler. */ | |
| 2215 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
| 2216 if (!NILP (handler)) | |
| 2217 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
| 2218 linkname, ok_if_already_exists)); | |
| 2219 | |
| 771 | 2220 #ifdef HAVE_SYMLINK |
| 428 | 2221 if (NILP (ok_if_already_exists) |
| 2222 || INTP (ok_if_already_exists)) | |
| 2223 barf_or_query_if_file_exists (linkname, "make it a link", | |
| 2224 INTP (ok_if_already_exists), 0); | |
| 2225 | |
| 771 | 2226 qxe_unlink (XSTRING_DATA (linkname)); |
| 2227 if (0 > qxe_symlink (XSTRING_DATA (filename), | |
| 2228 XSTRING_DATA (linkname))) | |
| 428 | 2229 { |
| 2230 report_file_error ("Making symbolic link", | |
| 563 | 2231 list3 (Qunbound, filename, linkname)); |
| 428 | 2232 } |
| 771 | 2233 #endif |
| 442 | 2234 |
| 428 | 2235 UNGCPRO; |
| 2236 return Qnil; | |
| 2237 } | |
| 2238 | |
| 2239 #ifdef HPUX_NET | |
| 2240 | |
| 2241 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /* | |
| 2242 Open a network connection to PATH using LOGIN as the login string. | |
| 2243 */ | |
| 2244 (path, login)) | |
| 2245 { | |
| 2246 int netresult; | |
| 1333 | 2247 const Extbyte *path_ext; |
| 2248 const Extbyte *login_ext; | |
| 428 | 2249 |
| 2250 CHECK_STRING (path); | |
| 2251 CHECK_STRING (login); | |
| 2252 | |
| 2253 /* netunam, being a strange-o system call only used once, is not | |
| 2254 encapsulated. */ | |
| 440 | 2255 |
|
4981
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
Ben Wing <ben@xemacs.org>
parents:
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|
2256 LISP_PATHNAME_CONVERT_OUT (path, path_ext); |
|
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|
2257 login_ext = LISP_STRING_TO_EXTERNAL (login, Quser_name_encoding); |
| 440 | 2258 |
| 2259 netresult = netunam (path_ext, login_ext); | |
| 2260 | |
| 2261 return netresult == -1 ? Qnil : Qt; | |
| 428 | 2262 } |
| 2263 #endif /* HPUX_NET */ | |
| 2264 | |
| 2265 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /* | |
| 2266 Return t if file FILENAME specifies an absolute path name. | |
| 2267 On Unix, this is a name starting with a `/' or a `~'. | |
| 2268 */ | |
| 2269 (filename)) | |
| 2270 { | |
| 2271 /* This function does not GC */ | |
| 867 | 2272 Ibyte *ptr; |
| 428 | 2273 |
| 2274 CHECK_STRING (filename); | |
| 2275 ptr = XSTRING_DATA (filename); | |
| 2276 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~' | |
| 657 | 2277 #ifdef WIN32_FILENAMES |
| 428 | 2278 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2])) |
| 2279 #endif | |
| 2280 ) ? Qt : Qnil; | |
| 2281 } | |
| 2282 | |
| 2283 /* Return nonzero if file FILENAME exists and can be executed. */ | |
| 2284 | |
| 2285 static int | |
| 771 | 2286 check_executable (Lisp_Object filename) |
| 428 | 2287 { |
| 442 | 2288 #ifdef WIN32_NATIVE |
| 428 | 2289 struct stat st; |
| 771 | 2290 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2291 return 0; |
| 2292 return ((st.st_mode & S_IEXEC) != 0); | |
| 442 | 2293 #else /* not WIN32_NATIVE */ |
| 428 | 2294 #ifdef HAVE_EACCESS |
| 771 | 2295 return qxe_eaccess (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2296 #else |
| 2297 /* Access isn't quite right because it uses the real uid | |
| 2298 and we really want to test with the effective uid. | |
| 2299 But Unix doesn't give us a right way to do it. */ | |
| 771 | 2300 return qxe_access (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2301 #endif /* HAVE_EACCESS */ |
| 442 | 2302 #endif /* not WIN32_NATIVE */ |
| 428 | 2303 } |
| 2304 | |
| 2305 /* Return nonzero if file FILENAME exists and can be written. */ | |
| 2306 | |
| 2307 static int | |
| 867 | 2308 check_writable (const Ibyte *filename) |
| 428 | 2309 { |
|
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2310 #ifdef WIN32_ANY |
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2311 // Since this has to work for a directory, we can't just call 'CreateFile' |
|
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2312 PSECURITY_DESCRIPTOR pDesc; /* Must be freed with LocalFree */ |
|
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2313 /* these need not be freed, they point into pDesc */ |
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2314 PSID psidOwner; |
|
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2315 PSID psidGroup; |
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2316 PACL pDacl; |
|
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2317 PACL pSacl; |
|
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2318 /* end of insides of descriptor */ |
|
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2319 DWORD error; |
|
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2320 DWORD attributes; |
|
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2321 HANDLE tokenHandle; |
|
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2322 GENERIC_MAPPING genericMapping; |
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2323 DWORD accessMask; |
|
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2324 PRIVILEGE_SET PrivilegeSet; |
|
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2325 DWORD dwPrivSetSize = sizeof( PRIVILEGE_SET ); |
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2326 BOOL fAccessGranted = FALSE; |
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2327 DWORD dwAccessAllowed; |
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2328 Extbyte *fnameext; |
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2329 |
|
4867
7822019c5d98
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2330 LOCAL_FILE_FORMAT_TO_TSTR (filename, fnameext); |
|
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2331 |
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2332 // First check for a normal file with the old-style readonly bit |
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2333 attributes = qxeGetFileAttributes(fnameext); |
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2334 if (FILE_ATTRIBUTE_READONLY == (attributes & (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_READONLY))) |
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2335 return 0; |
|
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2336 |
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2337 /* Win32 prototype lacks const. */ |
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2338 error = qxeGetNamedSecurityInfo(fnameext, SE_FILE_OBJECT, |
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2339 DACL_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|OWNER_SECURITY_INFORMATION, |
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2340 &psidOwner, &psidGroup, &pDacl, &pSacl, &pDesc); |
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2341 if(error != ERROR_SUCCESS) { // FAT? |
| 3781 | 2342 attributes = qxeGetFileAttributes(fnameext); |
|
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2343 return (attributes & FILE_ATTRIBUTE_DIRECTORY) || (0 == (attributes & FILE_ATTRIBUTE_READONLY)); |
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2344 } |
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2345 |
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2346 genericMapping.GenericRead = FILE_GENERIC_READ; |
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2347 genericMapping.GenericWrite = FILE_GENERIC_WRITE; |
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2348 genericMapping.GenericExecute = FILE_GENERIC_EXECUTE; |
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2349 genericMapping.GenericAll = FILE_ALL_ACCESS; |
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2350 |
|
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2351 if(!ImpersonateSelf(SecurityDelegation)) { |
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2352 return 0; |
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2353 } |
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2354 if(!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, &tokenHandle)) { |
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2355 return 0; |
|
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2356 } |
|
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2357 |
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2358 accessMask = GENERIC_WRITE; |
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2359 MapGenericMask(&accessMask, &genericMapping); |
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2360 |
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2361 if(!AccessCheck(pDesc, tokenHandle, accessMask, &genericMapping, |
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2362 &PrivilegeSet, // receives privileges used in check |
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2363 &dwPrivSetSize, // size of PrivilegeSet buffer |
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2364 &dwAccessAllowed, // receives mask of allowed access rights |
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2365 &fAccessGranted)) |
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2366 { |
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2367 CloseHandle(tokenHandle); |
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2368 RevertToSelf(); |
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2369 LocalFree(pDesc); |
| 3781 | 2370 return 0; |
|
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2371 } |
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2372 CloseHandle(tokenHandle); |
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2373 RevertToSelf(); |
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2374 LocalFree(pDesc); |
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2375 return fAccessGranted == TRUE; |
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2376 #elif defined (HAVE_EACCESS) |
| 771 | 2377 return (qxe_eaccess (filename, W_OK) >= 0); |
| 428 | 2378 #else |
| 2379 /* Access isn't quite right because it uses the real uid | |
| 2380 and we really want to test with the effective uid. | |
| 2381 But Unix doesn't give us a right way to do it. | |
| 2382 Opening with O_WRONLY could work for an ordinary file, | |
| 2383 but would lose for directories. */ | |
| 771 | 2384 return (qxe_access (filename, W_OK) >= 0); |
|
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2385 #endif /* (not) defined (HAVE_EACCESS) */ |
| 428 | 2386 } |
| 2387 | |
| 2388 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /* | |
| 2389 Return t if file FILENAME exists. (This does not mean you can read it.) | |
| 2390 See also `file-readable-p' and `file-attributes'. | |
| 2391 */ | |
| 2392 (filename)) | |
| 2393 { | |
| 442 | 2394 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 2395 Lisp_Object abspath; |
| 2396 Lisp_Object handler; | |
| 2397 struct stat statbuf; | |
| 2398 struct gcpro gcpro1; | |
| 2399 | |
| 2400 CHECK_STRING (filename); | |
| 2401 abspath = Fexpand_file_name (filename, Qnil); | |
| 2402 | |
| 2403 /* If the file name has special constructs in it, | |
| 2404 call the corresponding file handler. */ | |
| 2405 GCPRO1 (abspath); | |
| 2406 handler = Ffind_file_name_handler (abspath, Qfile_exists_p); | |
| 2407 UNGCPRO; | |
| 2408 if (!NILP (handler)) | |
| 2409 return call2 (handler, Qfile_exists_p, abspath); | |
| 2410 | |
| 771 | 2411 return qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil; |
| 428 | 2412 } |
| 2413 | |
| 2414 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /* | |
| 2415 Return t if FILENAME can be executed by you. | |
| 2416 For a directory, this means you can access files in that directory. | |
| 2417 */ | |
| 2418 (filename)) | |
| 2419 | |
| 2420 { | |
| 442 | 2421 /* This function can GC. GC checked 07-11-2000 ben. */ |
| 428 | 2422 Lisp_Object abspath; |
| 2423 Lisp_Object handler; | |
| 2424 struct gcpro gcpro1; | |
| 2425 | |
| 2426 CHECK_STRING (filename); | |
| 2427 abspath = Fexpand_file_name (filename, Qnil); | |
| 2428 | |
| 2429 /* If the file name has special constructs in it, | |
| 2430 call the corresponding file handler. */ | |
| 2431 GCPRO1 (abspath); | |
| 2432 handler = Ffind_file_name_handler (abspath, Qfile_executable_p); | |
| 2433 UNGCPRO; | |
| 2434 if (!NILP (handler)) | |
| 2435 return call2 (handler, Qfile_executable_p, abspath); | |
| 2436 | |
| 771 | 2437 return check_executable (abspath) ? Qt : Qnil; |
| 428 | 2438 } |
| 2439 | |
| 2440 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /* | |
| 2441 Return t if file FILENAME exists and you can read it. | |
| 2442 See also `file-exists-p' and `file-attributes'. | |
| 2443 */ | |
| 2444 (filename)) | |
| 2445 { | |
| 2446 /* This function can GC */ | |
| 2447 Lisp_Object abspath = Qnil; | |
| 2448 Lisp_Object handler; | |
| 2449 struct gcpro gcpro1; | |
| 2450 GCPRO1 (abspath); | |
| 2451 | |
| 2452 CHECK_STRING (filename); | |
| 2453 abspath = Fexpand_file_name (filename, Qnil); | |
| 2454 | |
| 2455 /* If the file name has special constructs in it, | |
| 2456 call the corresponding file handler. */ | |
| 2457 handler = Ffind_file_name_handler (abspath, Qfile_readable_p); | |
| 2458 if (!NILP (handler)) | |
| 2459 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath)); | |
| 2460 | |
| 2526 | 2461 #if defined (WIN32_FILENAMES) |
| 428 | 2462 /* Under MS-DOS and Windows, open does not work for directories. */ |
| 2463 UNGCPRO; | |
| 771 | 2464 if (qxe_access (XSTRING_DATA (abspath), 0) == 0) |
| 428 | 2465 return Qt; |
| 2466 else | |
| 2467 return Qnil; | |
| 657 | 2468 #else /* not WIN32_FILENAMES */ |
| 428 | 2469 { |
| 771 | 2470 int desc = qxe_interruptible_open (XSTRING_DATA (abspath), |
| 2471 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 2472 UNGCPRO; |
| 2473 if (desc < 0) | |
| 2474 return Qnil; | |
| 771 | 2475 retry_close (desc); |
| 428 | 2476 return Qt; |
| 2477 } | |
| 657 | 2478 #endif /* not WIN32_FILENAMES */ |
| 428 | 2479 } |
| 2480 | |
| 2481 /* Having this before file-symlink-p mysteriously caused it to be forgotten | |
| 2482 on the RT/PC. */ | |
| 2483 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /* | |
| 2484 Return t if file FILENAME can be written or created by you. | |
| 2485 */ | |
| 2486 (filename)) | |
| 2487 { | |
| 2488 /* This function can GC. GC checked 1997.04.10. */ | |
| 2489 Lisp_Object abspath, dir; | |
| 2490 Lisp_Object handler; | |
| 2491 struct stat statbuf; | |
| 2492 struct gcpro gcpro1; | |
| 2493 | |
| 2494 CHECK_STRING (filename); | |
| 2495 abspath = Fexpand_file_name (filename, Qnil); | |
| 2496 | |
| 2497 /* If the file name has special constructs in it, | |
| 2498 call the corresponding file handler. */ | |
| 2499 GCPRO1 (abspath); | |
| 2500 handler = Ffind_file_name_handler (abspath, Qfile_writable_p); | |
| 2501 UNGCPRO; | |
| 2502 if (!NILP (handler)) | |
| 2503 return call2 (handler, Qfile_writable_p, abspath); | |
| 2504 | |
| 771 | 2505 if (qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0) |
| 2506 return (check_writable (XSTRING_DATA (abspath)) | |
| 428 | 2507 ? Qt : Qnil); |
| 2508 | |
| 2509 | |
| 2510 GCPRO1 (abspath); | |
| 2511 dir = Ffile_name_directory (abspath); | |
| 2512 UNGCPRO; | |
| 867 | 2513 return (check_writable (!NILP (dir) ? XSTRING_DATA (dir) : (Ibyte *) "") |
| 428 | 2514 ? Qt : Qnil); |
| 2515 } | |
| 2516 | |
| 2517 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /* | |
| 2518 Return non-nil if file FILENAME is the name of a symbolic link. | |
| 2519 The value is the name of the file to which it is linked. | |
| 2520 Otherwise returns nil. | |
| 2521 */ | |
| 2522 (filename)) | |
| 2523 { | |
| 2524 /* This function can GC. GC checked 1997.04.10. */ | |
| 442 | 2525 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 771 | 2526 #ifdef HAVE_READLINK |
| 867 | 2527 Ibyte *buf; |
| 428 | 2528 int bufsize; |
| 2529 int valsize; | |
| 2530 Lisp_Object val; | |
| 442 | 2531 #endif |
| 428 | 2532 Lisp_Object handler; |
| 2533 struct gcpro gcpro1; | |
| 2534 | |
| 2535 CHECK_STRING (filename); | |
| 2536 filename = Fexpand_file_name (filename, Qnil); | |
| 2537 | |
| 2538 /* If the file name has special constructs in it, | |
| 2539 call the corresponding file handler. */ | |
| 2540 GCPRO1 (filename); | |
| 2541 handler = Ffind_file_name_handler (filename, Qfile_symlink_p); | |
| 2542 UNGCPRO; | |
| 2543 if (!NILP (handler)) | |
| 2544 return call2 (handler, Qfile_symlink_p, filename); | |
| 2545 | |
| 771 | 2546 #ifdef HAVE_READLINK |
| 428 | 2547 bufsize = 100; |
| 2548 while (1) | |
| 2549 { | |
| 867 | 2550 buf = xnew_array_and_zero (Ibyte, bufsize); |
| 771 | 2551 valsize = qxe_readlink (XSTRING_DATA (filename), |
| 2552 buf, bufsize); | |
| 428 | 2553 if (valsize < bufsize) break; |
| 2554 /* Buffer was not long enough */ | |
|
4976
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Rename xfree(FOO, TYPE) -> xfree(FOO)
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diff
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|
2555 xfree (buf); |
| 428 | 2556 bufsize *= 2; |
| 2557 } | |
| 2558 if (valsize == -1) | |
| 2559 { | |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
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4953
diff
changeset
|
2560 xfree (buf); |
| 428 | 2561 return Qnil; |
| 2562 } | |
| 771 | 2563 val = make_string (buf, valsize); |
|
4976
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Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
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4953
diff
changeset
|
2564 xfree (buf); |
| 428 | 2565 return val; |
| 2526 | 2566 #elif defined (WIN32_NATIVE) |
| 2567 if (mswindows_shortcuts_are_symlinks) | |
| 2568 { | |
| 2569 /* We want to resolve the directory component and leave the rest | |
| 2570 alone. */ | |
| 2571 Ibyte *path = XSTRING_DATA (filename); | |
| 2572 Ibyte *dirend = | |
| 2573 find_end_of_directory_component (path, XSTRING_LENGTH (filename)); | |
| 2574 Ibyte *fname; | |
| 2575 DECLARE_EISTRING (dir); | |
| 2576 | |
| 2577 if (dirend != path) | |
| 2578 { | |
| 2579 Ibyte *resdir; | |
| 2580 DECLARE_EISTRING (resname); | |
| 2581 | |
| 2582 eicpy_raw (dir, path, dirend - path); | |
| 2583 PATHNAME_RESOLVE_LINKS (eidata (dir), resdir); | |
| 2584 eicpy_rawz (resname, resdir); | |
| 2585 eicat_rawz (resname, dirend); | |
| 2586 path = eidata (resname); | |
| 2587 } | |
| 2588 | |
| 2589 fname = mswindows_read_link (path); | |
| 2590 if (!fname) | |
| 2591 return Qnil; | |
| 2592 { | |
|
4953
304aebb79cd3
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Ben Wing <ben@xemacs.org>
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4952
diff
changeset
|
2593 Lisp_Object val = build_istring (fname); |
|
4976
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Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
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4953
diff
changeset
|
2594 xfree (fname); |
| 2526 | 2595 return val; |
| 2596 } | |
| 2597 } | |
| 428 | 2598 return Qnil; |
| 2526 | 2599 #else |
| 2600 return Qnil; | |
| 2601 #endif | |
| 428 | 2602 } |
| 2603 | |
| 2604 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /* | |
| 2605 Return t if file FILENAME is the name of a directory as a file. | |
| 2606 A directory name spec may be given instead; then the value is t | |
| 2607 if the directory so specified exists and really is a directory. | |
| 2608 */ | |
| 2609 (filename)) | |
| 2610 { | |
| 2611 /* This function can GC. GC checked 1997.04.10. */ | |
| 2612 Lisp_Object abspath; | |
| 2613 struct stat st; | |
| 2614 Lisp_Object handler; | |
| 2615 struct gcpro gcpro1; | |
| 2616 | |
| 2617 GCPRO1 (current_buffer->directory); | |
| 2618 abspath = expand_and_dir_to_file (filename, | |
| 2619 current_buffer->directory); | |
| 2620 UNGCPRO; | |
| 2621 | |
| 2622 /* If the file name has special constructs in it, | |
| 2623 call the corresponding file handler. */ | |
| 2624 GCPRO1 (abspath); | |
| 2625 handler = Ffind_file_name_handler (abspath, Qfile_directory_p); | |
| 2626 UNGCPRO; | |
| 2627 if (!NILP (handler)) | |
| 2628 return call2 (handler, Qfile_directory_p, abspath); | |
| 2629 | |
| 771 | 2630 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2631 return Qnil; |
| 2632 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
| 2633 } | |
| 2634 | |
| 2635 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /* | |
| 2636 Return t if file FILENAME is the name of a directory as a file, | |
| 2637 and files in that directory can be opened by you. In order to use a | |
| 2638 directory as a buffer's current directory, this predicate must return true. | |
| 2639 A directory name spec may be given instead; then the value is t | |
| 2640 if the directory so specified exists and really is a readable and | |
| 2641 searchable directory. | |
| 2642 */ | |
| 2643 (filename)) | |
| 2644 { | |
| 2645 /* This function can GC. GC checked 1997.04.10. */ | |
| 2646 Lisp_Object handler; | |
| 2647 | |
| 2648 /* If the file name has special constructs in it, | |
| 2649 call the corresponding file handler. */ | |
| 2650 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); | |
| 2651 if (!NILP (handler)) | |
| 2652 return call2 (handler, Qfile_accessible_directory_p, | |
| 2653 filename); | |
| 2654 | |
| 2526 | 2655 #if !defined (WIN32_NATIVE) |
| 428 | 2656 if (NILP (Ffile_directory_p (filename))) |
| 2657 return (Qnil); | |
| 2658 else | |
| 2659 return Ffile_executable_p (filename); | |
| 2660 #else | |
| 2661 { | |
| 2662 int tem; | |
| 2663 struct gcpro gcpro1; | |
| 2664 /* It's an unlikely combination, but yes we really do need to gcpro: | |
| 2665 Suppose that file-accessible-directory-p has no handler, but | |
| 2666 file-directory-p does have a handler; this handler causes a GC which | |
| 2667 relocates the string in `filename'; and finally file-directory-p | |
| 2668 returns non-nil. Then we would end up passing a garbaged string | |
| 2669 to file-executable-p. */ | |
| 2670 GCPRO1 (filename); | |
| 2671 tem = (NILP (Ffile_directory_p (filename)) | |
| 2672 || NILP (Ffile_executable_p (filename))); | |
| 2673 UNGCPRO; | |
| 2674 return tem ? Qnil : Qt; | |
| 2675 } | |
| 442 | 2676 #endif /* !defined(WIN32_NATIVE) */ |
| 428 | 2677 } |
| 2678 | |
| 2679 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /* | |
| 2680 Return t if file FILENAME is the name of a regular file. | |
| 2681 This is the sort of file that holds an ordinary stream of data bytes. | |
| 2682 */ | |
| 2683 (filename)) | |
| 2684 { | |
| 2685 /* This function can GC. GC checked 1997.04.10. */ | |
| 2686 Lisp_Object abspath; | |
| 2687 struct stat st; | |
| 2688 Lisp_Object handler; | |
| 2689 struct gcpro gcpro1; | |
| 2690 | |
| 2691 GCPRO1 (current_buffer->directory); | |
| 2692 abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
| 2693 UNGCPRO; | |
| 2694 | |
| 2695 /* If the file name has special constructs in it, | |
| 2696 call the corresponding file handler. */ | |
| 2697 GCPRO1 (abspath); | |
| 2698 handler = Ffind_file_name_handler (abspath, Qfile_regular_p); | |
| 2699 UNGCPRO; | |
| 2700 if (!NILP (handler)) | |
| 2701 return call2 (handler, Qfile_regular_p, abspath); | |
| 2702 | |
| 771 | 2703 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2704 return Qnil; |
| 2705 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
| 2706 } | |
| 2707 | |
| 2708 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /* | |
| 444 | 2709 Return mode bits of file named FILENAME, as an integer. |
| 428 | 2710 */ |
| 2711 (filename)) | |
| 2712 { | |
| 2713 /* This function can GC. GC checked 1997.04.10. */ | |
| 2714 Lisp_Object abspath; | |
| 2715 struct stat st; | |
| 2716 Lisp_Object handler; | |
| 2717 struct gcpro gcpro1; | |
| 2718 | |
| 2719 GCPRO1 (current_buffer->directory); | |
| 2720 abspath = expand_and_dir_to_file (filename, | |
| 2721 current_buffer->directory); | |
| 2722 UNGCPRO; | |
| 2723 | |
| 2724 /* If the file name has special constructs in it, | |
| 2725 call the corresponding file handler. */ | |
| 2726 GCPRO1 (abspath); | |
| 2727 handler = Ffind_file_name_handler (abspath, Qfile_modes); | |
| 2728 UNGCPRO; | |
| 2729 if (!NILP (handler)) | |
| 2730 return call2 (handler, Qfile_modes, abspath); | |
| 2731 | |
| 771 | 2732 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2733 return Qnil; |
| 2734 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */ | |
| 2735 #if 0 | |
| 442 | 2736 #ifdef WIN32_NATIVE |
| 771 | 2737 if (check_executable (abspath)) |
| 428 | 2738 st.st_mode |= S_IEXEC; |
| 442 | 2739 #endif /* WIN32_NATIVE */ |
| 428 | 2740 #endif /* 0 */ |
| 2741 | |
| 2742 return make_int (st.st_mode & 07777); | |
| 2743 } | |
| 2744 | |
| 2745 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /* | |
| 444 | 2746 Set mode bits of file named FILENAME to MODE (an integer). |
| 428 | 2747 Only the 12 low bits of MODE are used. |
| 2748 */ | |
| 2749 (filename, mode)) | |
| 2750 { | |
| 2751 /* This function can GC. GC checked 1997.04.10. */ | |
| 2752 Lisp_Object abspath; | |
| 2753 Lisp_Object handler; | |
| 2754 struct gcpro gcpro1; | |
| 2755 | |
| 2756 GCPRO1 (current_buffer->directory); | |
| 2757 abspath = Fexpand_file_name (filename, current_buffer->directory); | |
| 2758 UNGCPRO; | |
| 2759 | |
| 2760 CHECK_INT (mode); | |
| 2761 | |
| 2762 /* If the file name has special constructs in it, | |
| 2763 call the corresponding file handler. */ | |
| 2764 GCPRO1 (abspath); | |
| 2765 handler = Ffind_file_name_handler (abspath, Qset_file_modes); | |
| 2766 UNGCPRO; | |
| 2767 if (!NILP (handler)) | |
| 2768 return call3 (handler, Qset_file_modes, abspath, mode); | |
| 2769 | |
| 771 | 2770 if (qxe_chmod (XSTRING_DATA (abspath), XINT (mode)) < 0) |
| 563 | 2771 report_file_error ("Doing chmod", abspath); |
| 428 | 2772 |
| 2773 return Qnil; | |
| 2774 } | |
| 2775 | |
| 2776 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /* | |
| 2777 Set the file permission bits for newly created files. | |
| 444 | 2778 The argument MODE should be an integer; if a bit in MODE is 1, |
| 2779 subsequently created files will not have the permission corresponding | |
| 2780 to that bit enabled. Only the low 9 bits are used. | |
| 428 | 2781 This setting is inherited by subprocesses. |
| 2782 */ | |
| 2783 (mode)) | |
| 2784 { | |
| 2785 CHECK_INT (mode); | |
| 2786 | |
| 2787 umask ((~ XINT (mode)) & 0777); | |
| 2788 | |
| 2789 return Qnil; | |
| 2790 } | |
| 2791 | |
| 2792 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /* | |
| 2793 Return the default file protection for created files. | |
| 2794 The umask value determines which permissions are enabled in newly | |
| 2795 created files. If a permission's bit in the umask is 1, subsequently | |
| 2796 created files will not have that permission enabled. | |
| 2797 */ | |
| 2798 ()) | |
| 2799 { | |
| 2800 int mode; | |
| 2801 | |
| 2802 mode = umask (0); | |
| 2803 umask (mode); | |
| 2804 | |
| 2805 return make_int ((~ mode) & 0777); | |
| 2806 } | |
| 2807 | |
| 2808 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /* | |
| 2809 Tell Unix to finish all pending disk updates. | |
| 2810 */ | |
| 2811 ()) | |
| 2812 { | |
| 442 | 2813 #ifndef WIN32_NATIVE |
| 428 | 2814 sync (); |
| 2815 #endif | |
| 2816 return Qnil; | |
| 2817 } | |
| 2818 | |
| 2819 | |
| 2820 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /* | |
| 2821 Return t if file FILE1 is newer than file FILE2. | |
| 2822 If FILE1 does not exist, the answer is nil; | |
| 2823 otherwise, if FILE2 does not exist, the answer is t. | |
| 2824 */ | |
| 2825 (file1, file2)) | |
| 2826 { | |
| 2827 /* This function can GC. GC checked 1997.04.10. */ | |
| 2828 Lisp_Object abspath1, abspath2; | |
| 2829 struct stat st; | |
| 2830 int mtime1; | |
| 2831 Lisp_Object handler; | |
| 2832 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2833 | |
| 2834 CHECK_STRING (file1); | |
| 2835 CHECK_STRING (file2); | |
| 2836 | |
| 2837 abspath1 = Qnil; | |
| 2838 abspath2 = Qnil; | |
| 2839 | |
| 2840 GCPRO3 (abspath1, abspath2, current_buffer->directory); | |
| 2841 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
| 2842 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
| 2843 | |
| 2844 /* If the file name has special constructs in it, | |
| 2845 call the corresponding file handler. */ | |
| 2846 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p); | |
| 2847 if (NILP (handler)) | |
| 2848 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p); | |
| 2849 UNGCPRO; | |
| 2850 if (!NILP (handler)) | |
| 2851 return call3 (handler, Qfile_newer_than_file_p, abspath1, | |
| 2852 abspath2); | |
| 2853 | |
| 771 | 2854 if (qxe_stat (XSTRING_DATA (abspath1), &st) < 0) |
| 428 | 2855 return Qnil; |
| 2856 | |
| 2857 mtime1 = st.st_mtime; | |
| 2858 | |
| 771 | 2859 if (qxe_stat (XSTRING_DATA (abspath2), &st) < 0) |
| 428 | 2860 return Qt; |
| 2861 | |
| 2862 return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
| 2863 } | |
| 2864 | |
| 2865 | |
| 2866 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */ | |
| 2867 /* #define READ_BUF_SIZE (2 << 16) */ | |
| 2868 #define READ_BUF_SIZE (1 << 15) | |
| 2869 | |
| 2870 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal, | |
| 2871 1, 7, 0, /* | |
| 2872 Insert contents of file FILENAME after point; no coding-system frobbing. | |
| 2873 This function is identical to `insert-file-contents' except for the | |
| 771 | 2874 handling of the CODESYS and USED-CODESYS arguments. |
| 2875 | |
| 2876 The file is decoded according to CODESYS; if omitted, no conversion | |
| 2877 happens. If USED-CODESYS is non-nil, it should be a symbol, and the actual | |
| 2878 coding system that was used for the decoding is stored into it. It will in | |
| 2879 general be different from CODESYS if CODESYS specifies automatic encoding | |
| 2880 detection or end-of-line detection. | |
| 428 | 2881 |
| 444 | 2882 Currently START and END refer to byte positions (as opposed to character |
| 771 | 2883 positions), even in Mule and under MS Windows. (Fixing this, particularly |
| 2884 under Mule, is very difficult.) | |
| 428 | 2885 */ |
| 444 | 2886 (filename, visit, start, end, replace, codesys, used_codesys)) |
| 428 | 2887 { |
| 2888 /* This function can call lisp */ | |
| 2889 struct stat st; | |
| 2890 int fd; | |
| 2891 int saverrno = 0; | |
| 2892 Charcount inserted = 0; | |
| 2893 int speccount; | |
| 3841 | 2894 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3814 | 2895 Lisp_Object val; |
| 428 | 2896 int total; |
| 867 | 2897 Ibyte read_buf[READ_BUF_SIZE]; |
| 428 | 2898 int mc_count; |
| 2899 struct buffer *buf = current_buffer; | |
| 2900 Lisp_Object curbuf; | |
| 2901 int not_regular = 0; | |
| 771 | 2902 int do_speedy_insert = |
| 2903 coding_system_is_binary (Fget_coding_system (codesys)); | |
| 428 | 2904 |
| 2905 if (buf->base_buffer && ! NILP (visit)) | |
| 563 | 2906 invalid_operation ("Cannot do file visiting in an indirect buffer", Qunbound); |
| 428 | 2907 |
| 2908 /* No need to call Fbarf_if_buffer_read_only() here. | |
| 2909 That's called in begin_multiple_change() or wherever. */ | |
| 2910 | |
| 2911 val = Qnil; | |
| 2912 | |
| 2913 /* #### dmoore - should probably check in various places to see if | |
| 2914 curbuf was killed and if so signal an error? */ | |
| 2915 | |
| 793 | 2916 curbuf = wrap_buffer (buf); |
| 428 | 2917 |
| 3814 | 2918 GCPRO4 (filename, val, visit, curbuf); |
| 428 | 2919 |
| 2920 mc_count = (NILP (replace)) ? | |
| 2921 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) : | |
| 2922 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf)); | |
| 2923 | |
| 2924 speccount = specpdl_depth (); /* begin_multiple_change also adds | |
| 2925 an unwind_protect */ | |
| 2926 | |
| 2927 filename = Fexpand_file_name (filename, Qnil); | |
| 2928 | |
| 2929 if (!NILP (used_codesys)) | |
| 2930 CHECK_SYMBOL (used_codesys); | |
| 2931 | |
| 444 | 2932 if ( (!NILP (start) || !NILP (end)) && !NILP (visit) ) |
| 563 | 2933 invalid_operation ("Attempt to visit less than an entire file", Qunbound); |
| 428 | 2934 |
| 2935 fd = -1; | |
| 2936 | |
| 771 | 2937 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2938 { |
| 2939 badopen: | |
| 2940 if (NILP (visit)) | |
| 563 | 2941 report_file_error ("Opening input file", filename); |
| 428 | 2942 st.st_mtime = -1; |
| 2943 goto notfound; | |
| 2944 } | |
| 2945 | |
| 2946 #ifdef S_IFREG | |
| 2947 /* Signal an error if we are accessing a non-regular file, with | |
| 444 | 2948 REPLACE, START or END being non-nil. */ |
| 428 | 2949 if (!S_ISREG (st.st_mode)) |
| 2950 { | |
| 2951 not_regular = 1; | |
| 2952 | |
| 2953 if (!NILP (visit)) | |
| 2954 goto notfound; | |
| 2955 | |
| 444 | 2956 if (!NILP (replace) || !NILP (start) || !NILP (end)) |
| 428 | 2957 { |
| 2958 end_multiple_change (buf, mc_count); | |
| 2959 | |
| 444 | 2960 RETURN_UNGCPRO |
| 2961 (Fsignal (Qfile_error, | |
| 771 | 2962 list2 (build_msg_string("not a regular file"), |
| 444 | 2963 filename))); |
| 428 | 2964 } |
| 2965 } | |
| 2966 #endif /* S_IFREG */ | |
| 2967 | |
| 444 | 2968 if (!NILP (start)) |
| 2969 CHECK_INT (start); | |
| 428 | 2970 else |
| 444 | 2971 start = Qzero; |
| 428 | 2972 |
| 2973 if (!NILP (end)) | |
| 2974 CHECK_INT (end); | |
| 2975 | |
| 2976 if (fd < 0) | |
| 2977 { | |
| 771 | 2978 if ((fd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 2979 O_RDONLY | OPEN_BINARY, 0)) < 0) | |
| 428 | 2980 goto badopen; |
| 2981 } | |
| 2982 | |
| 2983 /* Replacement should preserve point as it preserves markers. */ | |
| 2984 if (!NILP (replace)) | |
| 2985 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil)); | |
| 2986 | |
| 2987 record_unwind_protect (close_file_unwind, make_int (fd)); | |
| 2988 | |
| 2989 /* Supposedly happens on VMS. */ | |
| 2990 if (st.st_size < 0) | |
| 563 | 2991 signal_error (Qfile_error, "File size is negative", Qunbound); |
| 428 | 2992 |
| 2993 if (NILP (end)) | |
| 2994 { | |
| 2995 if (!not_regular) | |
| 2996 { | |
| 2997 end = make_int (st.st_size); | |
| 2998 if (XINT (end) != st.st_size) | |
| 563 | 2999 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3000 } |
| 3001 } | |
| 3002 | |
| 3003 /* If requested, replace the accessible part of the buffer | |
| 3004 with the file contents. Avoid replacing text at the | |
| 3005 beginning or end of the buffer that matches the file contents; | |
| 771 | 3006 that preserves markers pointing to the unchanged parts. */ |
| 3007 /* The replace-mode code is currently implemented by comparing the | |
| 3008 file on disk with the contents in the buffer, character by character. | |
| 3009 That works only if the characters on disk are exactly what will go into | |
| 3010 the buffer -- i.e. `binary' conversion. | |
| 3011 | |
| 3012 FSF tries to implement this in all situations, even the non-binary | |
| 3013 conversion, by (in that case) loading the whole converted file into a | |
| 3014 separate memory area, then doing the comparison. I really don't see | |
| 3015 the point of this, and it will fail spectacularly if the file is many | |
| 3016 megabytes in size. To try to get around this, we could certainly read | |
| 3017 from the beginning and decode as necessary before comparing, but doing | |
| 3018 the same at the end gets very difficult because of the possibility of | |
| 3019 modal coding systems -- trying to decode data from any point forward | |
| 3020 without decoding previous data might always give you different results | |
| 3021 from starting at the beginning. We could try further tricks like | |
| 3022 keeping track of which coding systems are non-modal and providing some | |
| 3023 extra method for such coding systems to be given a chunk of data that | |
| 3024 came from a specified location in a specified file and ask the coding | |
| 3025 systems to return a "sync point" from which the data can be read | |
| 3026 forward and have results guaranteed to be the same as reading from the | |
| 3027 beginning to that point, but I really don't think it's worth it. If | |
| 3028 we implemented the FSF "brute-force" method, we would have to put a | |
| 3029 reasonable maximum file size on the files. Is any of this worth it? | |
| 3030 --ben | |
| 3031 | |
| 3638 | 3032 |
| 3033 It's probably not worth it, and despite what you might take from the | |
| 3034 above, we don't do it currently; that is, for non-"binary" coding | |
| 3035 systems, we don't try to implement replace-mode at all. See the | |
| 3036 do_speedy_insert variable above. The upside of this is that our API | |
| 3037 is consistent and not buggy. -- Aidan Kehoe, Fri Oct 27 21:02:30 CEST | |
| 3038 2006 | |
| 771 | 3039 */ |
| 3040 | |
| 428 | 3041 if (!NILP (replace)) |
| 3042 { | |
| 771 | 3043 if (!do_speedy_insert) |
| 3044 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf), | |
| 3045 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3046 else | |
| 428 | 3047 { |
|
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
|
3048 Rawbyte buffer[1 << 14]; |
| 771 | 3049 Charbpos same_at_start = BUF_BEGV (buf); |
| 3050 Charbpos same_at_end = BUF_ZV (buf); | |
| 3051 int overlap; | |
| 3052 | |
| 3053 /* Count how many chars at the start of the file | |
| 3054 match the text at the beginning of the buffer. */ | |
| 3055 while (1) | |
| 3056 { | |
| 3057 int nread; | |
| 3058 Charbpos charbpos; | |
| 3059 nread = read_allowing_quit (fd, buffer, sizeof (buffer)); | |
| 3060 if (nread < 0) | |
| 3061 report_file_error ("Reading", filename); | |
| 3062 else if (nread == 0) | |
| 3063 break; | |
| 3064 charbpos = 0; | |
| 3065 while (charbpos < nread && same_at_start < BUF_ZV (buf) | |
| 814 | 3066 && BUF_FETCH_CHAR (buf, same_at_start) == |
| 3067 buffer[charbpos]) | |
| 771 | 3068 same_at_start++, charbpos++; |
| 3069 /* If we found a discrepancy, stop the scan. | |
| 3070 Otherwise loop around and scan the next bufferful. */ | |
| 3071 if (charbpos != nread) | |
| 3072 break; | |
| 3073 } | |
| 3074 /* If the file matches the buffer completely, | |
| 3075 there's no need to replace anything. */ | |
| 3076 if (same_at_start - BUF_BEGV (buf) == st.st_size) | |
| 3077 { | |
| 3078 retry_close (fd); | |
| 3079 unbind_to (speccount); | |
| 3080 /* Truncate the buffer to the size of the file. */ | |
| 3081 buffer_delete_range (buf, same_at_start, same_at_end, | |
| 3082 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3083 goto handled; | |
| 3084 } | |
| 3085 /* Count how many chars at the end of the file | |
| 3086 match the text at the end of the buffer. */ | |
| 3087 while (1) | |
| 3088 { | |
| 3089 int total_read, nread; | |
| 814 | 3090 Charcount charbpos, curpos, trial; |
| 771 | 3091 |
| 3092 /* At what file position are we now scanning? */ | |
| 3093 curpos = st.st_size - (BUF_ZV (buf) - same_at_end); | |
| 3094 /* If the entire file matches the buffer tail, stop the scan. */ | |
| 3095 if (curpos == 0) | |
| 3096 break; | |
| 3097 /* How much can we scan in the next step? */ | |
| 3098 trial = min (curpos, (Charbpos) sizeof (buffer)); | |
| 3099 if (lseek (fd, curpos - trial, 0) < 0) | |
| 3100 report_file_error ("Setting file position", filename); | |
| 3101 | |
| 3102 total_read = 0; | |
| 3103 while (total_read < trial) | |
| 3104 { | |
| 3105 nread = read_allowing_quit (fd, buffer + total_read, | |
| 3106 trial - total_read); | |
| 3107 if (nread <= 0) | |
| 3108 report_file_error ("IO error reading file", filename); | |
| 3109 total_read += nread; | |
| 3110 } | |
| 3111 /* Scan this bufferful from the end, comparing with | |
| 3112 the Emacs buffer. */ | |
| 3113 charbpos = total_read; | |
| 3114 /* Compare with same_at_start to avoid counting some buffer text | |
| 3115 as matching both at the file's beginning and at the end. */ | |
| 3116 while (charbpos > 0 && same_at_end > same_at_start | |
| 3117 && BUF_FETCH_CHAR (buf, same_at_end - 1) == | |
| 3118 buffer[charbpos - 1]) | |
| 3119 same_at_end--, charbpos--; | |
| 3120 /* If we found a discrepancy, stop the scan. | |
| 3121 Otherwise loop around and scan the preceding bufferful. */ | |
| 3122 if (charbpos != 0) | |
| 3123 break; | |
| 3124 /* If display current starts at beginning of line, | |
| 3125 keep it that way. */ | |
| 3126 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf) | |
| 3127 XWINDOW (Fselected_window (Qnil))->start_at_line_beg = | |
| 3128 !NILP (Fbolp (wrap_buffer (buf))); | |
| 3129 } | |
| 3130 | |
| 3131 /* Don't try to reuse the same piece of text twice. */ | |
| 3132 overlap = same_at_start - BUF_BEGV (buf) - | |
| 3133 (same_at_end + st.st_size - BUF_ZV (buf)); | |
| 3134 if (overlap > 0) | |
| 3135 same_at_end += overlap; | |
| 3136 | |
| 3137 /* Arrange to read only the nonmatching middle part of the file. */ | |
| 3138 start = make_int (same_at_start - BUF_BEGV (buf)); | |
| 3139 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end)); | |
| 3140 | |
| 428 | 3141 buffer_delete_range (buf, same_at_start, same_at_end, |
| 3142 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 771 | 3143 /* Insert from the file at the proper position. */ |
| 3144 BUF_SET_PT (buf, same_at_start); | |
| 428 | 3145 } |
| 3146 } | |
| 3147 | |
| 3148 if (!not_regular) | |
| 3149 { | |
| 444 | 3150 total = XINT (end) - XINT (start); |
| 428 | 3151 |
| 3152 /* Make sure point-max won't overflow after this insertion. */ | |
| 3153 if (total != XINT (make_int (total))) | |
| 563 | 3154 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3155 } |
| 3156 else | |
| 3157 /* For a special file, all we can do is guess. The value of -1 | |
| 3158 will make the stream functions read as much as possible. */ | |
| 3159 total = -1; | |
| 3160 | |
| 444 | 3161 if (XINT (start) != 0 |
| 428 | 3162 /* why was this here? asked jwz. The reason is that the replace-mode |
| 3163 connivings above will normally put the file pointer other than | |
| 3164 where it should be. */ | |
| 771 | 3165 || (!NILP (replace) && do_speedy_insert)) |
| 428 | 3166 { |
| 444 | 3167 if (lseek (fd, XINT (start), 0) < 0) |
| 563 | 3168 report_file_error ("Setting file position", filename); |
| 428 | 3169 } |
| 3170 | |
| 3171 { | |
| 665 | 3172 Charbpos cur_point = BUF_PT (buf); |
| 428 | 3173 struct gcpro ngcpro1; |
| 3174 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total, | |
| 3175 LSTR_ALLOW_QUIT); | |
| 3176 | |
| 3177 NGCPRO1 (stream); | |
| 3178 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 771 | 3179 stream = make_coding_input_stream |
| 3180 (XLSTREAM (stream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 3181 CODING_DECODE, 0); |
| 428 | 3182 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); |
| 3183 | |
| 3184 record_unwind_protect (delete_stream_unwind, stream); | |
| 3185 | |
| 3186 /* No need to limit the amount of stuff we attempt to read. (It would | |
| 3187 be incorrect, anyway, when Mule is enabled.) Instead, the limiting | |
| 3188 occurs inside of the filedesc stream. */ | |
| 3189 while (1) | |
| 3190 { | |
| 665 | 3191 Bytecount this_len; |
| 428 | 3192 Charcount cc_inserted; |
| 3193 | |
| 3194 QUIT; | |
| 3195 this_len = Lstream_read (XLSTREAM (stream), read_buf, | |
| 3196 sizeof (read_buf)); | |
| 3197 | |
| 3198 if (this_len <= 0) | |
| 3199 { | |
| 3200 if (this_len < 0) | |
| 3201 saverrno = errno; | |
| 3202 break; | |
| 3203 } | |
| 3204 | |
| 3205 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf, | |
| 3206 this_len, | |
| 3207 !NILP (visit) | |
| 3208 ? INSDEL_NO_LOCKING : 0); | |
| 3209 inserted += cc_inserted; | |
| 3210 cur_point += cc_inserted; | |
| 3211 } | |
| 3212 if (!NILP (used_codesys)) | |
| 3213 { | |
| 3214 Fset (used_codesys, | |
| 771 | 3215 XCODING_SYSTEM_NAME |
| 3216 (coding_stream_detected_coding_system (XLSTREAM (stream)))); | |
| 428 | 3217 } |
| 3218 NUNGCPRO; | |
| 3219 } | |
| 3220 | |
| 3221 /* Close the file/stream */ | |
| 771 | 3222 unbind_to (speccount); |
| 428 | 3223 |
| 3224 if (saverrno != 0) | |
| 3225 { | |
| 563 | 3226 errno = saverrno; |
| 3227 report_file_error ("Reading", filename); | |
| 428 | 3228 } |
| 3229 | |
| 3230 notfound: | |
| 3231 handled: | |
| 3232 | |
| 3233 end_multiple_change (buf, mc_count); | |
| 3234 | |
| 3235 if (!NILP (visit)) | |
| 3236 { | |
| 3237 if (!EQ (buf->undo_list, Qt)) | |
| 3238 buf->undo_list = Qnil; | |
| 3814 | 3239 buf->modtime = st.st_mtime; |
| 3240 buf->filename = filename; | |
| 3241 /* XEmacs addition: */ | |
| 3242 /* This function used to be in C, ostensibly so that | |
| 3243 it could be called here. But that's just silly. | |
| 3244 There's no reason C code can't call out to Lisp | |
| 3245 code, and it's a lot cleaner this way. */ | |
| 3246 /* Note: compute-buffer-file-truename is called for | |
| 3247 side-effect! Its return value is intentionally | |
| 3248 ignored. */ | |
| 3249 if (!NILP (Ffboundp (Qcompute_buffer_file_truename))) | |
| 3250 call1 (Qcompute_buffer_file_truename, wrap_buffer (buf)); | |
| 428 | 3251 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf); |
| 3252 buf->auto_save_modified = BUF_MODIFF (buf); | |
| 3253 buf->saved_size = make_int (BUF_SIZE (buf)); | |
| 3254 #ifdef CLASH_DETECTION | |
| 3814 | 3255 if (!NILP (buf->file_truename)) |
| 3256 unlock_file (buf->file_truename); | |
| 3257 unlock_file (filename); | |
| 428 | 3258 #endif /* CLASH_DETECTION */ |
| 3259 if (not_regular) | |
| 3260 RETURN_UNGCPRO (Fsignal (Qfile_error, | |
| 771 | 3261 list2 (build_msg_string ("not a regular file"), |
| 428 | 3262 filename))); |
| 3263 | |
| 3264 /* If visiting nonexistent file, return nil. */ | |
| 3265 if (buf->modtime == -1) | |
| 3266 report_file_error ("Opening input file", | |
| 563 | 3267 filename); |
| 428 | 3268 } |
| 3269 | |
| 3270 /* Decode file format */ | |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3271 if (inserted > 0 && !UNBOUNDP (XSYMBOL_FUNCTION (Qformat_decode))) |
| 428 | 3272 { |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3273 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
|
3274 visit); |
| 428 | 3275 CHECK_INT (insval); |
| 3276 inserted = XINT (insval); | |
| 3277 } | |
| 3278 | |
| 3279 if (inserted > 0) | |
| 3280 { | |
| 2367 | 3281 GC_EXTERNAL_LIST_LOOP_2 (p, Vafter_insert_file_functions) |
| 428 | 3282 { |
| 2367 | 3283 Lisp_Object insval = call1 (p, make_int (inserted)); |
| 428 | 3284 if (!NILP (insval)) |
| 3285 { | |
| 3286 CHECK_NATNUM (insval); | |
| 3287 inserted = XINT (insval); | |
| 3288 } | |
| 3289 } | |
| 2367 | 3290 END_GC_EXTERNAL_LIST_LOOP (p); |
| 428 | 3291 } |
| 3292 | |
| 3293 UNGCPRO; | |
| 3294 | |
| 3295 if (!NILP (val)) | |
| 3296 return (val); | |
| 3297 else | |
| 3298 return (list2 (filename, make_int (inserted))); | |
| 3299 } | |
| 3300 | |
| 3301 | |
| 3302 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3303 Lisp_Object *annot); | |
| 3304 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end); | |
| 3305 | |
| 3306 /* If build_annotations switched buffers, switch back to BUF. | |
| 3307 Kill the temporary buffer that was selected in the meantime. */ | |
| 3308 | |
| 3309 static Lisp_Object | |
| 3310 build_annotations_unwind (Lisp_Object buf) | |
| 3311 { | |
| 3312 Lisp_Object tembuf; | |
| 3313 | |
| 3314 if (XBUFFER (buf) == current_buffer) | |
| 3315 return Qnil; | |
| 3316 tembuf = Fcurrent_buffer (); | |
| 3317 Fset_buffer (buf); | |
| 3318 Fkill_buffer (tembuf); | |
| 3319 return Qnil; | |
| 3320 } | |
| 3321 | |
| 4266 | 3322 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 8, |
| 428 | 3323 "r\nFWrite region to file: ", /* |
| 3324 Write current region into specified file; no coding-system frobbing. | |
| 4266 | 3325 |
| 3326 This function is almost identical to `write-region'; see that function for | |
| 3327 documentation of the START, END, FILENAME, APPEND, VISIT, and LOCKNAME | |
| 3328 arguments. CODESYS specifies the encoding to be used for the file; if it is | |
| 3329 nil, no code conversion occurs. (With `write-region' the coding system is | |
| 3330 determined automatically if not specified.) | |
| 3331 | |
| 3332 MUSTBENEW specifies that a check for an existing file of the same name | |
| 3333 should be made. If it is 'excl, XEmacs will error on detecting such a file | |
| 3334 and never write it. If it is some other non-nil value, the user will be | |
| 3335 prompted to confirm the overwriting of an existing file. If it is nil, | |
| 3336 existing files are silently overwritten when file system permissions allow | |
| 3337 this. | |
| 764 | 3338 |
| 3339 As a special kludge to support auto-saving, when START is nil START and | |
| 3340 END are set to the beginning and end, respectively, of the buffer, | |
| 3341 regardless of any restrictions. Don't use this feature. It is documented | |
| 3342 here because write-region handler writers need to be aware of it. | |
| 4266 | 3343 |
| 428 | 3344 */ |
| 4266 | 3345 (start, end, filename, append, visit, lockname, codesys, |
| 3346 mustbenew)) | |
| 428 | 3347 { |
| 442 | 3348 /* This function can call lisp. GC checked 2000-07-28 ben */ |
| 428 | 3349 int desc; |
| 3350 int failure; | |
| 3351 int save_errno = 0; | |
| 3352 struct stat st; | |
| 442 | 3353 Lisp_Object fn = Qnil; |
| 428 | 3354 int speccount = specpdl_depth (); |
| 3355 int visiting_other = STRINGP (visit); | |
| 3356 int visiting = (EQ (visit, Qt) || visiting_other); | |
| 3357 int quietly = (!visiting && !NILP (visit)); | |
| 3358 Lisp_Object visit_file = Qnil; | |
| 3359 Lisp_Object annotations = Qnil; | |
| 3360 struct buffer *given_buffer; | |
| 665 | 3361 Charbpos start1, end1; |
| 442 | 3362 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3363 struct gcpro ngcpro1, ngcpro2; | |
| 793 | 3364 Lisp_Object curbuf = wrap_buffer (current_buffer); |
| 3365 | |
| 442 | 3366 |
| 3367 /* start, end, visit, and append are never modified in this fun | |
| 3368 so we don't protect them. */ | |
| 3369 GCPRO5 (visit_file, filename, codesys, lockname, annotations); | |
| 3370 NGCPRO2 (curbuf, fn); | |
| 3371 | |
| 3372 /* [[ dmoore - if Fexpand_file_name or handlers kill the buffer, | |
| 428 | 3373 we should signal an error rather than blissfully continuing |
| 3374 along. ARGH, this function is going to lose lose lose. We need | |
| 3375 to protect the current_buffer from being destroyed, but the | |
| 442 | 3376 multiple return points make this a pain in the butt. ]] we do |
| 3377 protect curbuf now. --ben */ | |
| 428 | 3378 |
| 771 | 3379 codesys = get_coding_system_for_text_file (codesys, 0); |
| 428 | 3380 |
| 3381 if (current_buffer->base_buffer && ! NILP (visit)) | |
| 442 | 3382 invalid_operation ("Cannot do file visiting in an indirect buffer", |
| 3383 curbuf); | |
| 428 | 3384 |
| 3385 if (!NILP (start) && !STRINGP (start)) | |
| 3386 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0); | |
| 3387 | |
| 3388 { | |
| 3389 Lisp_Object handler; | |
| 3390 | |
| 4266 | 3391 if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
| 3392 barf_or_query_if_file_exists (filename, "overwrite", 1, NULL); | |
| 3393 | |
| 428 | 3394 if (visiting_other) |
| 3395 visit_file = Fexpand_file_name (visit, Qnil); | |
| 3396 else | |
| 3397 visit_file = filename; | |
| 3398 filename = Fexpand_file_name (filename, Qnil); | |
| 3399 | |
| 3400 if (NILP (lockname)) | |
| 3401 lockname = visit_file; | |
| 3402 | |
| 442 | 3403 /* We used to UNGCPRO here. BAD! visit_file is used below after |
| 3404 more Lisp calling. */ | |
| 428 | 3405 /* If the file name has special constructs in it, |
| 3406 call the corresponding file handler. */ | |
| 3407 handler = Ffind_file_name_handler (filename, Qwrite_region); | |
| 3408 /* If FILENAME has no handler, see if VISIT has one. */ | |
| 3409 if (NILP (handler) && STRINGP (visit)) | |
| 3410 handler = Ffind_file_name_handler (visit, Qwrite_region); | |
| 3411 | |
| 3412 if (!NILP (handler)) | |
| 3413 { | |
| 3414 Lisp_Object val = call8 (handler, Qwrite_region, start, end, | |
| 3415 filename, append, visit, lockname, codesys); | |
| 3416 if (visiting) | |
| 3417 { | |
| 3418 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3419 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3420 current_buffer->filename = visit_file; | |
| 3421 MARK_MODELINE_CHANGED; | |
| 3422 } | |
| 442 | 3423 NUNGCPRO; |
| 3424 UNGCPRO; | |
| 428 | 3425 return val; |
| 3426 } | |
| 3427 } | |
| 3428 | |
| 3429 #ifdef CLASH_DETECTION | |
| 3430 if (!auto_saving) | |
| 442 | 3431 lock_file (lockname); |
| 428 | 3432 #endif /* CLASH_DETECTION */ |
| 3433 | |
| 3434 /* Special kludge to simplify auto-saving. */ | |
| 3435 if (NILP (start)) | |
| 3436 { | |
| 3437 start1 = BUF_BEG (current_buffer); | |
| 3438 end1 = BUF_Z (current_buffer); | |
| 3439 } | |
| 3440 | |
| 3441 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); | |
| 3442 | |
| 3443 given_buffer = current_buffer; | |
| 3444 annotations = build_annotations (start, end); | |
| 3445 if (current_buffer != given_buffer) | |
| 3446 { | |
| 3447 start1 = BUF_BEGV (current_buffer); | |
| 3448 end1 = BUF_ZV (current_buffer); | |
| 3449 } | |
| 3450 | |
| 3451 fn = filename; | |
| 3452 desc = -1; | |
| 3453 if (!NILP (append)) | |
| 3454 { | |
| 4266 | 3455 desc = qxe_open (XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY |
| 3456 | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), 0); | |
| 428 | 3457 } |
| 3458 if (desc < 0) | |
| 3459 { | |
| 771 | 3460 desc = qxe_open (XSTRING_DATA (fn), |
| 4266 | 3461 O_WRONLY | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC) |
| 3462 | O_CREAT | OPEN_BINARY, | |
| 771 | 3463 auto_saving ? auto_save_mode_bits : CREAT_MODE); |
| 428 | 3464 } |
| 3465 | |
| 3466 if (desc < 0) | |
| 3467 { | |
| 3468 #ifdef CLASH_DETECTION | |
| 3469 save_errno = errno; | |
| 3470 if (!auto_saving) unlock_file (lockname); | |
| 3471 errno = save_errno; | |
| 3472 #endif /* CLASH_DETECTION */ | |
| 563 | 3473 report_file_error ("Opening output file", filename); |
| 428 | 3474 } |
| 3475 | |
| 3476 { | |
| 3477 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil); | |
| 3478 Lisp_Object instream = Qnil, outstream = Qnil; | |
| 442 | 3479 struct gcpro nngcpro1, nngcpro2; |
| 3480 NNGCPRO2 (instream, outstream); | |
| 428 | 3481 |
| 3482 record_unwind_protect (close_file_unwind, desc_locative); | |
| 3483 | |
| 3484 if (!NILP (append)) | |
| 3485 { | |
| 3486 if (lseek (desc, 0, 2) < 0) | |
| 3487 { | |
| 3488 #ifdef CLASH_DETECTION | |
| 3489 if (!auto_saving) unlock_file (lockname); | |
| 3490 #endif /* CLASH_DETECTION */ | |
| 3491 report_file_error ("Lseek error", | |
| 563 | 3492 filename); |
| 428 | 3493 } |
| 3494 } | |
| 3495 | |
| 3496 failure = 0; | |
| 3497 | |
| 3498 /* Note: I tried increasing the buffering size, along with | |
| 3499 various other tricks, but nothing seemed to make much of | |
| 3500 a difference in the time it took to save a large file. | |
| 3501 (Actually that's not true. With a local disk, changing | |
| 3502 the buffer size doesn't seem to make much difference. | |
| 3503 With an NFS-mounted disk, it could make a lot of difference | |
| 3504 because you're affecting the number of network requests | |
| 3505 that need to be made, and there could be a large latency | |
| 3506 for each request. So I've increased the buffer size | |
| 3507 to 64K.) */ | |
| 3508 outstream = make_filedesc_output_stream (desc, 0, -1, 0); | |
| 3509 Lstream_set_buffering (XLSTREAM (outstream), | |
| 3510 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3511 outstream = | |
| 800 | 3512 make_coding_output_stream (XLSTREAM (outstream), codesys, |
| 3513 CODING_ENCODE, 0); | |
| 428 | 3514 Lstream_set_buffering (XLSTREAM (outstream), |
| 3515 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3516 if (STRINGP (start)) | |
| 3517 { | |
| 3518 instream = make_lisp_string_input_stream (start, 0, -1); | |
| 3519 start1 = 0; | |
| 3520 } | |
| 3521 else | |
| 3522 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1, | |
| 3523 LSTR_SELECTIVE | | |
| 3524 LSTR_IGNORE_ACCESSIBLE); | |
| 3525 failure = (0 > (a_write (outstream, instream, start1, | |
| 3526 &annotations))); | |
| 3527 save_errno = errno; | |
| 3528 /* Note that this doesn't close the desc since we created the | |
| 3529 stream without the LSTR_CLOSING flag, but it does | |
| 3530 flush out any buffered data. */ | |
| 3531 if (Lstream_close (XLSTREAM (outstream)) < 0) | |
| 3532 { | |
| 3533 failure = 1; | |
| 3534 save_errno = errno; | |
| 3535 } | |
| 3536 Lstream_close (XLSTREAM (instream)); | |
| 3537 | |
| 3538 #ifdef HAVE_FSYNC | |
| 3539 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). | |
| 3540 Disk full in NFS may be reported here. */ | |
| 3541 /* mib says that closing the file will try to write as fast as NFS can do | |
| 3542 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
|
3543 if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0 |
| 428 | 3544 /* If fsync fails with EINTR, don't treat that as serious. */ |
| 3545 && errno != EINTR) | |
| 3546 { | |
| 3547 failure = 1; | |
| 3548 save_errno = errno; | |
| 3549 } | |
| 3550 #endif /* HAVE_FSYNC */ | |
| 3551 | |
| 440 | 3552 /* Spurious "file has changed on disk" warnings used to be seen on |
| 3553 systems where close() can change the modtime. This is known to | |
| 3554 happen on various NFS file systems, on Windows, and on Linux. | |
| 3555 Rather than handling this on a per-system basis, we | |
| 771 | 3556 unconditionally do the qxe_stat() after the retry_close(). */ |
| 428 | 3557 |
| 3558 /* NFS can report a write failure now. */ | |
| 771 | 3559 if (retry_close (desc) < 0) |
| 428 | 3560 { |
| 3561 failure = 1; | |
| 3562 save_errno = errno; | |
| 3563 } | |
| 3564 | |
| 3565 /* Discard the close unwind-protect. Execute the one for | |
| 3566 build_annotations (switches back to the original current buffer | |
| 3567 as necessary). */ | |
| 3568 XCAR (desc_locative) = Qnil; | |
| 771 | 3569 unbind_to (speccount); |
| 442 | 3570 |
| 3571 NNUNGCPRO; | |
| 428 | 3572 } |
| 3573 | |
| 771 | 3574 qxe_stat (XSTRING_DATA (fn), &st); |
| 428 | 3575 |
| 3576 #ifdef CLASH_DETECTION | |
| 3577 if (!auto_saving) | |
| 3578 unlock_file (lockname); | |
| 3579 #endif /* CLASH_DETECTION */ | |
| 3580 | |
| 3581 /* Do this before reporting IO error | |
| 3582 to avoid a "file has changed on disk" warning on | |
| 3583 next attempt to save. */ | |
| 3584 if (visiting) | |
| 3585 current_buffer->modtime = st.st_mtime; | |
| 3586 | |
| 3587 if (failure) | |
| 442 | 3588 { |
| 3589 errno = save_errno; | |
| 563 | 3590 report_file_error ("Writing file", fn); |
| 442 | 3591 } |
| 428 | 3592 |
| 3593 if (visiting) | |
| 3594 { | |
| 3595 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3596 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3597 current_buffer->filename = visit_file; | |
| 3598 MARK_MODELINE_CHANGED; | |
| 3599 } | |
| 3600 else if (quietly) | |
| 3601 { | |
| 442 | 3602 NUNGCPRO; |
| 3603 UNGCPRO; | |
| 428 | 3604 return Qnil; |
| 3605 } | |
| 3606 | |
| 3607 if (!auto_saving) | |
| 3608 { | |
| 3609 if (visiting_other) | |
| 3610 message ("Wrote %s", XSTRING_DATA (visit_file)); | |
| 3611 else | |
| 3612 { | |
| 446 | 3613 Lisp_Object fsp = Qnil; |
| 442 | 3614 struct gcpro nngcpro1; |
| 3615 | |
| 3616 NNGCPRO1 (fsp); | |
| 428 | 3617 fsp = Ffile_symlink_p (fn); |
| 3618 if (NILP (fsp)) | |
| 3619 message ("Wrote %s", XSTRING_DATA (fn)); | |
| 3620 else | |
| 3621 message ("Wrote %s (symlink to %s)", | |
| 3622 XSTRING_DATA (fn), XSTRING_DATA (fsp)); | |
| 442 | 3623 NNUNGCPRO; |
| 428 | 3624 } |
| 3625 } | |
| 442 | 3626 NUNGCPRO; |
| 3627 UNGCPRO; | |
| 428 | 3628 return Qnil; |
| 3629 } | |
| 3630 | |
| 3631 /* Build the complete list of annotations appropriate for writing out | |
| 3632 the text between START and END, by calling all the functions in | |
| 3633 write-region-annotate-functions and merging the lists they return. | |
| 3634 If one of these functions switches to a different buffer, we assume | |
| 3635 that buffer contains altered text. Therefore, the caller must | |
| 3636 make sure to restore the current buffer in all cases, | |
| 3637 as save-excursion would do. */ | |
| 3638 | |
| 3639 static Lisp_Object | |
| 3640 build_annotations (Lisp_Object start, Lisp_Object end) | |
| 3641 { | |
| 3642 /* This function can GC */ | |
| 3643 Lisp_Object annotations; | |
| 3644 Lisp_Object p, res; | |
| 3645 struct gcpro gcpro1, gcpro2; | |
| 793 | 3646 Lisp_Object original_buffer = wrap_buffer (current_buffer); |
| 3647 | |
| 428 | 3648 |
| 3649 annotations = Qnil; | |
| 3650 p = Vwrite_region_annotate_functions; | |
| 3651 GCPRO2 (annotations, p); | |
| 3652 while (!NILP (p)) | |
| 3653 { | |
| 3654 struct buffer *given_buffer = current_buffer; | |
| 3655 Vwrite_region_annotations_so_far = annotations; | |
| 3656 res = call2 (Fcar (p), start, end); | |
| 3657 /* If the function makes a different buffer current, | |
| 3658 assume that means this buffer contains altered text to be output. | |
| 3659 Reset START and END from the buffer bounds | |
| 3660 and discard all previous annotations because they should have | |
| 3661 been dealt with by this function. */ | |
| 3662 if (current_buffer != given_buffer) | |
| 3663 { | |
| 3664 start = make_int (BUF_BEGV (current_buffer)); | |
| 3665 end = make_int (BUF_ZV (current_buffer)); | |
| 3666 annotations = Qnil; | |
| 3667 } | |
| 3668 Flength (res); /* Check basic validity of return value */ | |
| 3669 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3670 p = Fcdr (p); | |
| 3671 } | |
| 3672 | |
| 3673 /* 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
|
3674 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
|
3675 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3676 p = Qnil; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3677 } |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3678 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
|
3679 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3680 p = Vauto_save_file_format; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3681 } |
| 428 | 3682 else |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3683 { |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3684 p = current_buffer->file_format; |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3685 } |
|
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3686 |
| 428 | 3687 while (!NILP (p)) |
| 3688 { | |
| 3689 struct buffer *given_buffer = current_buffer; | |
| 3690 Vwrite_region_annotations_so_far = annotations; | |
| 3691 res = call4 (Qformat_annotate_function, Fcar (p), start, end, | |
| 3692 original_buffer); | |
| 3693 if (current_buffer != given_buffer) | |
| 3694 { | |
| 3695 start = make_int (BUF_BEGV (current_buffer)); | |
| 3696 end = make_int (BUF_ZV (current_buffer)); | |
| 3697 annotations = Qnil; | |
| 3698 } | |
| 3699 Flength (res); | |
| 3700 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3701 p = Fcdr (p); | |
| 3702 } | |
|
5004
788c38f20376
Do not assume #'format-decode exists in fileio.c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5000
diff
changeset
|
3703 |
| 428 | 3704 UNGCPRO; |
| 3705 return annotations; | |
| 3706 } | |
| 3707 | |
| 3708 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until | |
| 3709 EOF is encountered), assuming they start at position POS in the buffer | |
| 3710 of string that STREAM refers to. Intersperse with them the annotations | |
| 3711 from *ANNOT that fall into the range of positions we are reading from, | |
| 3712 each at its appropriate position. | |
| 3713 | |
| 3714 Modify *ANNOT by discarding elements as we output them. | |
| 3715 The return value is negative in case of system call failure. */ | |
| 3716 | |
| 3717 /* 4K should probably be fine. We just need to reduce the number of | |
| 3718 function calls to reasonable level. The Lstream stuff itself will | |
| 3719 batch to 64K to reduce the number of system calls. */ | |
| 3720 | |
| 3721 #define A_WRITE_BATCH_SIZE 4096 | |
| 3722 | |
| 3723 static int | |
| 3724 a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3725 Lisp_Object *annot) | |
| 3726 { | |
| 3727 Lisp_Object tem; | |
| 3728 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
|
3729 Ibyte largebuf[A_WRITE_BATCH_SIZE]; |
| 428 | 3730 Lstream *instr = XLSTREAM (instream); |
| 3731 Lstream *outstr = XLSTREAM (outstream); | |
| 3732 | |
| 3733 while (LISTP (*annot)) | |
| 3734 { | |
| 3735 tem = Fcar_safe (Fcar (*annot)); | |
| 3736 if (INTP (tem)) | |
| 3737 nextpos = XINT (tem); | |
| 3738 else | |
| 3739 nextpos = INT_MAX; | |
| 3740 #ifdef MULE | |
| 3741 /* If there are annotations left and we have Mule, then we | |
| 867 | 3742 have to do the I/O one ichar at a time so we can |
| 428 | 3743 determine when to insert the annotation. */ |
| 3744 if (!NILP (*annot)) | |
| 3745 { | |
| 867 | 3746 Ichar ch; |
| 3747 while (pos != nextpos && (ch = Lstream_get_ichar (instr)) != EOF) | |
| 428 | 3748 { |
| 867 | 3749 if (Lstream_put_ichar (outstr, ch) < 0) |
| 428 | 3750 return -1; |
| 3751 pos++; | |
| 3752 } | |
| 3753 } | |
| 3754 else | |
| 3755 #endif /* MULE */ | |
| 3756 { | |
| 3757 while (pos != nextpos) | |
| 3758 { | |
| 3759 /* Otherwise there is no point to that. Just go in batches. */ | |
| 3760 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE); | |
| 3761 | |
| 3762 chunk = Lstream_read (instr, largebuf, chunk); | |
| 3763 if (chunk < 0) | |
| 3764 return -1; | |
| 3765 if (chunk == 0) /* EOF */ | |
| 3766 break; | |
| 771 | 3767 if (Lstream_write (outstr, largebuf, chunk) < 0) |
| 428 | 3768 return -1; |
| 3769 pos += chunk; | |
| 3770 } | |
| 3771 } | |
| 3772 if (pos == nextpos) | |
| 3773 { | |
| 3774 tem = Fcdr (Fcar (*annot)); | |
| 3775 if (STRINGP (tem)) | |
| 3776 { | |
| 3777 if (Lstream_write (outstr, XSTRING_DATA (tem), | |
| 3778 XSTRING_LENGTH (tem)) < 0) | |
| 3779 return -1; | |
| 3780 } | |
| 3781 *annot = Fcdr (*annot); | |
| 3782 } | |
| 3783 else | |
| 3784 return 0; | |
| 3785 } | |
| 3786 return -1; | |
| 3787 } | |
| 3788 | |
| 3789 | |
| 3790 | |
| 3791 #if 0 | |
| 3792 #include <des_crypt.h> | |
| 3793 | |
| 3794 #define CRYPT_BLOCK_SIZE 8 /* bytes */ | |
| 3795 #define CRYPT_KEY_SIZE 8 /* bytes */ | |
| 3796 | |
| 3797 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /* | |
| 3798 Encrypt STRING using KEY. | |
| 3799 */ | |
| 3800 (string, key)) | |
| 3801 { | |
| 2367 | 3802 /* !!#### Needs work */ |
| 1333 | 3803 Extbyte *encrypted_string, *raw_key; |
| 3804 Extbyte *string_ext, *key_ext; | |
| 3805 Bytecount string_size_ext, key_size_ext, rounded_size, extra, key_size; | |
| 3806 | |
| 428 | 3807 CHECK_STRING (string); |
| 3808 CHECK_STRING (key); | |
| 3809 | |
| 1333 | 3810 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3811 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3812 | |
| 3813 extra = string_size_ext % CRYPT_BLOCK_SIZE; | |
| 3814 rounded_size = string_size_ext + extra; | |
| 851 | 3815 encrypted_string = ALLOCA (rounded_size + 1); |
| 1333 | 3816 memcpy (encrypted_string, string_ext, string_size_ext); |
| 428 | 3817 memset (encrypted_string + rounded_size - extra, 0, extra + 1); |
| 3818 | |
| 1333 | 3819 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3820 |
| 851 | 3821 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3822 memcpy (raw_key, key_ext, key_size); |
| 428 | 3823 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3824 | |
| 3825 ecb_crypt (raw_key, encrypted_string, rounded_size, | |
| 3826 DES_ENCRYPT | DES_SW); | |
|
4953
304aebb79cd3
function renamings to track names of char typedefs
Ben Wing <ben@xemacs.org>
parents:
4952
diff
changeset
|
3827 return make_extstring (encrypted_string, rounded_size, Qbinary); |
| 428 | 3828 } |
| 3829 | |
| 3830 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /* | |
| 3831 Decrypt STRING using KEY. | |
| 3832 */ | |
| 3833 (string, key)) | |
| 3834 { | |
| 1333 | 3835 Extbyte *decrypted_string, *raw_key; |
| 3836 Extbyte *string_ext, *key_ext; | |
| 3837 Bytecount string_size_ext, key_size_ext, string_size, key_size; | |
| 428 | 3838 |
| 3839 CHECK_STRING (string); | |
| 3840 CHECK_STRING (key); | |
| 3841 | |
| 1333 | 3842 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3843 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3844 | |
| 3845 string_size = string_size_ext + 1; | |
| 851 | 3846 decrypted_string = ALLOCA (string_size); |
| 1333 | 3847 memcpy (decrypted_string, string_ext, string_size); |
| 428 | 3848 decrypted_string[string_size - 1] = '\0'; |
| 3849 | |
| 1333 | 3850 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3851 |
| 851 | 3852 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3853 memcpy (raw_key, key_ext, key_size); |
| 428 | 3854 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3855 | |
| 3856 | |
| 3857 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
|
3858 return make_extstring (decrypted_string, string_size - 1, Qbinary); |
| 428 | 3859 } |
| 3860 #endif /* 0 */ | |
| 3861 | |
| 3862 | |
| 3863 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /* | |
| 444 | 3864 Return t if last mod time of BUFFER's visited file matches what BUFFER records. |
| 428 | 3865 This means that the file has not been changed since it was visited or saved. |
| 3866 */ | |
| 444 | 3867 (buffer)) |
| 428 | 3868 { |
| 442 | 3869 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 3870 struct buffer *b; |
| 3871 struct stat st; | |
| 3872 Lisp_Object handler; | |
| 3873 | |
| 444 | 3874 CHECK_BUFFER (buffer); |
| 3875 b = XBUFFER (buffer); | |
| 428 | 3876 |
| 3877 if (!STRINGP (b->filename)) return Qt; | |
| 3878 if (b->modtime == 0) return Qt; | |
| 3879 | |
| 3880 /* If the file name has special constructs in it, | |
| 3881 call the corresponding file handler. */ | |
| 3882 handler = Ffind_file_name_handler (b->filename, | |
| 3883 Qverify_visited_file_modtime); | |
| 3884 if (!NILP (handler)) | |
| 444 | 3885 return call2 (handler, Qverify_visited_file_modtime, buffer); |
| 428 | 3886 |
| 771 | 3887 if (qxe_stat (XSTRING_DATA (b->filename), &st) < 0) |
| 428 | 3888 { |
| 3889 /* If the file doesn't exist now and didn't exist before, | |
| 3890 we say that it isn't modified, provided the error is a tame one. */ | |
| 3891 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
| 3892 st.st_mtime = -1; | |
| 3893 else | |
| 3894 st.st_mtime = 0; | |
| 3895 } | |
| 3896 if (st.st_mtime == b->modtime | |
| 3897 /* If both are positive, accept them if they are off by one second. */ | |
| 3898 || (st.st_mtime > 0 && b->modtime > 0 | |
| 3899 && (st.st_mtime == b->modtime + 1 | |
| 3900 || st.st_mtime == b->modtime - 1))) | |
| 3901 return Qt; | |
| 3902 return Qnil; | |
| 3903 } | |
| 3904 | |
| 3905 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /* | |
| 3906 Clear out records of last mod time of visited file. | |
| 3907 Next attempt to save will certainly not complain of a discrepancy. | |
| 3908 */ | |
| 3909 ()) | |
| 3910 { | |
| 3911 current_buffer->modtime = 0; | |
| 3912 return Qnil; | |
| 3913 } | |
| 3914 | |
| 3915 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /* | |
| 3916 Return the current buffer's recorded visited file modification time. | |
| 3917 The value is a list of the form (HIGH . LOW), like the time values | |
| 3918 that `file-attributes' returns. | |
| 3919 */ | |
| 3920 ()) | |
| 3921 { | |
| 3922 return time_to_lisp ((time_t) current_buffer->modtime); | |
| 3923 } | |
| 3924 | |
| 3925 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /* | |
| 3926 Update buffer's recorded modification time from the visited file's time. | |
| 3927 Useful if the buffer was not read from the file normally | |
| 3928 or if the file itself has been changed for some known benign reason. | |
| 3929 An argument specifies the modification time value to use | |
| 3930 \(instead of that of the visited file), in the form of a list | |
| 3931 \(HIGH . LOW) or (HIGH LOW). | |
| 3932 */ | |
| 3933 (time_list)) | |
| 3934 { | |
| 3935 /* This function can call lisp */ | |
| 3936 if (!NILP (time_list)) | |
| 3937 { | |
| 3938 time_t the_time; | |
| 3939 lisp_to_time (time_list, &the_time); | |
| 3940 current_buffer->modtime = (int) the_time; | |
| 3941 } | |
| 3942 else | |
| 3943 { | |
| 446 | 3944 Lisp_Object filename = Qnil; |
| 428 | 3945 struct stat st; |
| 3946 Lisp_Object handler; | |
| 3947 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 3948 | |
| 3949 GCPRO3 (filename, time_list, current_buffer->filename); | |
| 3950 filename = Fexpand_file_name (current_buffer->filename, Qnil); | |
| 3951 | |
| 3952 /* If the file name has special constructs in it, | |
| 3953 call the corresponding file handler. */ | |
| 3954 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); | |
| 3955 UNGCPRO; | |
| 3956 if (!NILP (handler)) | |
| 3957 /* The handler can find the file name the same way we did. */ | |
| 3958 return call2 (handler, Qset_visited_file_modtime, Qnil); | |
| 771 | 3959 else if (qxe_stat (XSTRING_DATA (filename), &st) >= 0) |
| 428 | 3960 current_buffer->modtime = st.st_mtime; |
| 3961 } | |
| 3962 | |
| 3963 return Qnil; | |
| 3964 } | |
| 3965 | |
| 3966 static Lisp_Object | |
| 2286 | 3967 auto_save_error (Lisp_Object UNUSED (condition_object), |
| 3968 Lisp_Object UNUSED (ignored)) | |
| 428 | 3969 { |
| 3970 /* This function can call lisp */ | |
| 3971 if (gc_in_progress) | |
| 3972 return Qnil; | |
| 3973 /* Don't try printing an error message after everything is gone! */ | |
| 3974 if (preparing_for_armageddon) | |
| 3975 return Qnil; | |
| 3976 clear_echo_area (selected_frame (), Qauto_saving, 1); | |
| 3977 Fding (Qt, Qauto_save_error, Qnil); | |
| 3978 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 3979 Fsleep_for (make_int (1)); | |
| 3980 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name)); | |
| 3981 Fsleep_for (make_int (1)); | |
| 3982 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 3983 Fsleep_for (make_int (1)); | |
| 3984 return Qnil; | |
| 3985 } | |
| 3986 | |
| 3987 static Lisp_Object | |
| 2286 | 3988 auto_save_1 (Lisp_Object UNUSED (ignored)) |
| 428 | 3989 { |
| 3990 /* This function can call lisp */ | |
| 3991 /* #### I think caller is protecting current_buffer? */ | |
| 3992 struct stat st; | |
| 3993 Lisp_Object fn = current_buffer->filename; | |
| 3994 Lisp_Object a = current_buffer->auto_save_file_name; | |
| 3995 | |
| 3996 if (!STRINGP (a)) | |
| 3997 return (Qnil); | |
| 3998 | |
| 3999 /* Get visited file's mode to become the auto save file's mode. */ | |
| 4000 if (STRINGP (fn) && | |
| 771 | 4001 qxe_stat (XSTRING_DATA (fn), &st) >= 0) |
| 428 | 4002 /* But make sure we can overwrite it later! */ |
| 4003 auto_save_mode_bits = st.st_mode | 0600; | |
| 4004 else | |
| 4005 /* default mode for auto-save files of buffers with no file is | |
| 4006 readable by owner only. This may annoy some small number of | |
| 4007 people, but the alternative removes all privacy from email. */ | |
| 4008 auto_save_mode_bits = 0600; | |
| 4009 | |
| 4010 return | |
| 4011 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil, | |
| 771 | 4012 #if 1 /* #### Kyle wants it changed to not use escape-quoted. Think |
| 4013 carefully about how this works. */ | |
| 4266 | 4014 Qescape_quoted, |
| 771 | 4015 #else |
| 4266 | 4016 current_buffer->buffer_file_coding_system, |
| 428 | 4017 #endif |
| 4266 | 4018 Qnil); |
| 428 | 4019 } |
| 4020 | |
| 4021 static Lisp_Object | |
| 2286 | 4022 auto_save_expand_name_error (Lisp_Object condition_object, |
| 4023 Lisp_Object UNUSED (ignored)) | |
| 428 | 4024 { |
| 771 | 4025 warn_when_safe_lispobj |
| 793 | 4026 (Qfile, Qerror, |
| 771 | 4027 Fcons (build_msg_string ("Invalid auto-save list-file"), |
| 4028 Fcons (Vauto_save_list_file_name, | |
| 4029 condition_object))); | |
| 428 | 4030 return Qnil; |
| 4031 } | |
| 4032 | |
| 4033 static Lisp_Object | |
| 4034 auto_save_expand_name (Lisp_Object name) | |
| 4035 { | |
| 4036 struct gcpro gcpro1; | |
| 4037 | |
| 4038 /* note that caller did NOT gc protect name, so we do it. */ | |
| 771 | 4039 /* [[dmoore - this might not be necessary, if condition_case_1 |
| 4040 protects it. but I don't think it does.]] indeed it doesn't. --ben */ | |
| 428 | 4041 GCPRO1 (name); |
| 4042 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil)); | |
| 4043 } | |
| 4044 | |
| 4045 | |
| 4046 static Lisp_Object | |
| 4047 do_auto_save_unwind (Lisp_Object fd) | |
| 4048 { | |
| 771 | 4049 retry_close (XINT (fd)); |
| 428 | 4050 return (fd); |
| 4051 } | |
| 4052 | |
| 4053 /* Fdo_auto_save() checks whether a GC is in progress when it is called, | |
| 4054 and if so, tries to avoid touching lisp objects. | |
| 4055 | |
| 4056 The only time that Fdo_auto_save() is called while GC is in progress | |
| 2500 | 4057 is if we're going down, as a result of an ABORT() or a kill signal. |
| 428 | 4058 It's fairly important that we generate autosave files in that case! |
| 4059 */ | |
| 4060 | |
| 4061 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /* | |
| 4062 Auto-save all buffers that need it. | |
| 4063 This is all buffers that have auto-saving enabled | |
| 4064 and are changed since last auto-saved. | |
| 4065 Auto-saving writes the buffer into a file | |
| 4066 so that your editing is not lost if the system crashes. | |
| 4067 This file is not the file you visited; that changes only when you save. | |
| 4068 Normally we run the normal hook `auto-save-hook' before saving. | |
| 4069 | |
| 4070 Non-nil first argument means do not print any message if successful. | |
| 4071 Non-nil second argument means save only current buffer. | |
| 4072 */ | |
| 4073 (no_message, current_only)) | |
| 4074 { | |
| 4075 /* This function can call lisp */ | |
| 4076 struct buffer *b; | |
| 4077 Lisp_Object tail, buf; | |
| 4078 int auto_saved = 0; | |
| 4079 int do_handled_files; | |
| 4080 Lisp_Object oquit = Qnil; | |
| 4081 Lisp_Object listfile = Qnil; | |
| 4082 Lisp_Object old; | |
| 4083 int listdesc = -1; | |
| 4084 int speccount = specpdl_depth (); | |
| 4085 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4086 | |
| 793 | 4087 old = wrap_buffer (current_buffer); |
| 428 | 4088 GCPRO3 (oquit, listfile, old); |
| 4089 check_quit (); /* make Vquit_flag accurate */ | |
| 4090 /* Ordinarily don't quit within this function, | |
| 4091 but don't make it impossible to quit (in case we get hung in I/O). */ | |
| 4092 oquit = Vquit_flag; | |
| 4093 Vquit_flag = Qnil; | |
| 4094 | |
| 4095 /* No further GCPRO needed, because (when it matters) all Lisp_Object | |
| 4096 variables point to non-strings reached from Vbuffer_alist. */ | |
| 4097 | |
| 4098 if (minibuf_level != 0 || preparing_for_armageddon) | |
| 4099 no_message = Qt; | |
| 4100 | |
| 4101 run_hook (Qauto_save_hook); | |
| 4102 | |
| 4103 if (STRINGP (Vauto_save_list_file_name)) | |
| 4104 listfile = condition_case_1 (Qt, | |
| 4105 auto_save_expand_name, | |
| 4106 Vauto_save_list_file_name, | |
| 4107 auto_save_expand_name_error, Qnil); | |
| 4108 | |
| 853 | 4109 internal_bind_int (&auto_saving, 1); |
| 428 | 4110 |
| 4111 /* First, save all files which don't have handlers. If Emacs is | |
| 4112 crashing, the handlers may tweak what is causing Emacs to crash | |
| 4113 in the first place, and it would be a shame if Emacs failed to | |
| 4114 autosave perfectly ordinary files because it couldn't handle some | |
| 4115 ange-ftp'd file. */ | |
| 4116 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
| 4117 { | |
| 4118 for (tail = Vbuffer_alist; | |
| 4119 CONSP (tail); | |
| 4120 tail = XCDR (tail)) | |
| 4121 { | |
| 4122 buf = XCDR (XCAR (tail)); | |
| 4123 b = XBUFFER (buf); | |
| 4124 | |
| 4125 if (!NILP (current_only) | |
| 4126 && b != current_buffer) | |
| 4127 continue; | |
| 4128 | |
| 4129 /* Don't auto-save indirect buffers. | |
| 4130 The base buffer takes care of it. */ | |
| 4131 if (b->base_buffer) | |
| 4132 continue; | |
| 4133 | |
| 4134 /* Check for auto save enabled | |
| 4135 and file changed since last auto save | |
| 4136 and file changed since last real save. */ | |
| 4137 if (STRINGP (b->auto_save_file_name) | |
| 4138 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) | |
| 4139 && b->auto_save_modified < BUF_MODIFF (b) | |
| 4140 /* -1 means we've turned off autosaving for a while--see below. */ | |
| 4141 && XINT (b->saved_size) >= 0 | |
| 4142 && (do_handled_files | |
| 4143 || NILP (Ffind_file_name_handler (b->auto_save_file_name, | |
| 4144 Qwrite_region)))) | |
| 4145 { | |
| 4146 EMACS_TIME before_time, after_time; | |
| 4147 | |
| 4148 EMACS_GET_TIME (before_time); | |
| 4149 /* If we had a failure, don't try again for 20 minutes. */ | |
| 4150 if (!preparing_for_armageddon | |
| 4151 && b->auto_save_failure_time >= 0 | |
| 4152 && (EMACS_SECS (before_time) - b->auto_save_failure_time < | |
| 4153 1200)) | |
| 4154 continue; | |
| 4155 | |
| 4156 if (!preparing_for_armageddon && | |
| 4157 (XINT (b->saved_size) * 10 | |
| 4158 > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
| 4159 /* A short file is likely to change a large fraction; | |
| 4160 spare the user annoying messages. */ | |
| 4161 && XINT (b->saved_size) > 5000 | |
| 4162 /* These messages are frequent and annoying for `*mail*'. */ | |
| 4163 && !NILP (b->filename) | |
| 4164 && NILP (no_message) | |
| 4165 && disable_auto_save_when_buffer_shrinks) | |
| 4166 { | |
| 4167 /* It has shrunk too much; turn off auto-saving here. | |
| 4168 Unless we're about to crash, in which case auto-save it | |
| 4169 anyway. | |
| 4170 */ | |
| 4171 message | |
| 4172 ("Buffer %s has shrunk a lot; auto save turned off there", | |
| 4173 XSTRING_DATA (b->name)); | |
| 4174 /* Turn off auto-saving until there's a real save, | |
| 4175 and prevent any more warnings. */ | |
| 4176 b->saved_size = make_int (-1); | |
| 4177 if (!gc_in_progress) | |
| 4178 Fsleep_for (make_int (1)); | |
| 4179 continue; | |
| 4180 } | |
| 4181 set_buffer_internal (b); | |
| 4182 if (!auto_saved && NILP (no_message)) | |
| 4183 { | |
| 1333 | 4184 static const Ibyte *msg = (const Ibyte *) "Auto-saving..."; |
| 428 | 4185 echo_area_message (selected_frame (), msg, Qnil, |
| 1333 | 4186 0, qxestrlen (msg), |
| 428 | 4187 Qauto_saving); |
| 4188 } | |
| 4189 | |
| 4190 /* Open the auto-save list file, if necessary. | |
| 4191 We only do this now so that the file only exists | |
| 4192 if we actually auto-saved any files. */ | |
| 444 | 4193 if (!auto_saved && !inhibit_auto_save_session |
| 4194 && !NILP (Vauto_save_list_file_prefix) | |
| 4195 && STRINGP (listfile) && listdesc < 0) | |
| 428 | 4196 { |
| 771 | 4197 listdesc = |
| 4198 qxe_open (XSTRING_DATA (listfile), | |
| 4199 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY, | |
| 4200 CREAT_MODE); | |
| 428 | 4201 |
| 4202 /* Arrange to close that file whether or not we get | |
| 4203 an error. */ | |
| 4204 if (listdesc >= 0) | |
| 4205 record_unwind_protect (do_auto_save_unwind, | |
| 4206 make_int (listdesc)); | |
| 4207 } | |
| 4208 | |
| 4209 /* Record all the buffers that we are auto-saving in | |
| 4210 the special file that lists them. For each of | |
| 4211 these buffers, record visited name (if any) and | |
| 4212 auto save name. */ | |
| 4213 if (listdesc >= 0) | |
| 4214 { | |
| 442 | 4215 const Extbyte *auto_save_file_name_ext; |
| 665 | 4216 Bytecount auto_save_file_name_ext_len; |
| 428 | 4217 |
|
4981
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4953
diff
changeset
|
4218 LISP_STRING_TO_SIZED_EXTERNAL (b->auto_save_file_name, |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
4219 auto_save_file_name_ext, |
|
4aebb0131297
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Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
4220 auto_save_file_name_ext_len, |
|
4aebb0131297
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Ben Wing <ben@xemacs.org>
parents:
4953
diff
changeset
|
4221 Qescape_quoted); |
| 428 | 4222 if (!NILP (b->filename)) |
| 4223 { | |
| 442 | 4224 const Extbyte *filename_ext; |
| 665 | 4225 Bytecount filename_ext_len; |
| 428 | 4226 |
|
4981
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|
4227 LISP_STRING_TO_SIZED_EXTERNAL (b->filename, |
|
4aebb0131297
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changeset
|
4228 filename_ext, |
|
4aebb0131297
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
4229 filename_ext_len, |
|
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
4230 Qescape_quoted); |
| 771 | 4231 retry_write (listdesc, filename_ext, filename_ext_len); |
| 428 | 4232 } |
| 771 | 4233 retry_write (listdesc, "\n", 1); |
| 4234 retry_write (listdesc, auto_save_file_name_ext, | |
| 428 | 4235 auto_save_file_name_ext_len); |
| 771 | 4236 retry_write (listdesc, "\n", 1); |
| 428 | 4237 } |
| 4238 | |
| 4239 /* dmoore - In a bad scenario we've set b=XBUFFER(buf) | |
| 4240 based on values in Vbuffer_alist. auto_save_1 may | |
| 4241 cause lisp handlers to run. Those handlers may kill | |
| 4242 the buffer and then GC. Since the buffer is killed, | |
| 4243 it's no longer in Vbuffer_alist so it might get reaped | |
| 4244 by the GC. We also need to protect tail. */ | |
| 4245 /* #### There is probably a lot of other code which has | |
| 4246 pointers into buffers which may get blown away by | |
| 4247 handlers. */ | |
| 4248 { | |
| 4249 struct gcpro ngcpro1, ngcpro2; | |
| 4250 NGCPRO2 (buf, tail); | |
| 4251 condition_case_1 (Qt, | |
| 4252 auto_save_1, Qnil, | |
| 4253 auto_save_error, Qnil); | |
| 4254 NUNGCPRO; | |
| 4255 } | |
| 4256 /* Handler killed our saved current-buffer! Pick any. */ | |
| 4257 if (!BUFFER_LIVE_P (XBUFFER (old))) | |
| 793 | 4258 old = wrap_buffer (current_buffer); |
| 428 | 4259 |
| 4260 set_buffer_internal (XBUFFER (old)); | |
| 4261 auto_saved++; | |
| 4262 | |
| 4263 /* Handler killed their own buffer! */ | |
| 4264 if (!BUFFER_LIVE_P(b)) | |
| 4265 continue; | |
| 4266 | |
| 4267 b->auto_save_modified = BUF_MODIFF (b); | |
| 4268 b->saved_size = make_int (BUF_SIZE (b)); | |
| 4269 EMACS_GET_TIME (after_time); | |
| 4270 /* If auto-save took more than 60 seconds, | |
| 4271 assume it was an NFS failure that got a timeout. */ | |
| 4272 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
| 4273 b->auto_save_failure_time = EMACS_SECS (after_time); | |
| 4274 } | |
| 4275 } | |
| 4276 } | |
| 4277 | |
| 4278 /* Prevent another auto save till enough input events come in. */ | |
| 4279 if (auto_saved) | |
| 4280 record_auto_save (); | |
| 4281 | |
| 4282 /* If we didn't save anything into the listfile, remove the old | |
| 4283 one because nothing needed to be auto-saved. Do this afterwards | |
| 4284 rather than before in case we get a crash attempting to autosave | |
| 4285 (in that case we'd still want the old one around). */ | |
| 4286 if (listdesc < 0 && !auto_saved && STRINGP (listfile)) | |
| 771 | 4287 qxe_unlink (XSTRING_DATA (listfile)); |
| 428 | 4288 |
| 4289 /* Show "...done" only if the echo area would otherwise be empty. */ | |
| 4290 if (auto_saved && NILP (no_message) | |
| 4291 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0))) | |
| 4292 { | |
| 1333 | 4293 static const Ibyte *msg = (const Ibyte *)"Auto-saving...done"; |
| 428 | 4294 echo_area_message (selected_frame (), msg, Qnil, 0, |
| 1333 | 4295 qxestrlen (msg), Qauto_saving); |
| 428 | 4296 } |
| 4297 | |
| 4298 Vquit_flag = oquit; | |
| 4299 | |
| 771 | 4300 RETURN_UNGCPRO (unbind_to (speccount)); |
| 428 | 4301 } |
| 4302 | |
| 4303 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /* | |
| 4304 Mark current buffer as auto-saved with its current text. | |
| 4305 No auto-save file will be written until the buffer changes again. | |
| 4306 */ | |
| 4307 ()) | |
| 4308 { | |
| 4309 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer); | |
| 4310 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 4311 current_buffer->auto_save_failure_time = -1; | |
| 4312 return Qnil; | |
| 4313 } | |
| 4314 | |
| 4315 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /* | |
| 4316 Clear any record of a recent auto-save failure in the current buffer. | |
| 4317 */ | |
| 4318 ()) | |
| 4319 { | |
| 4320 current_buffer->auto_save_failure_time = -1; | |
| 4321 return Qnil; | |
| 4322 } | |
| 4323 | |
| 4324 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /* | |
| 4325 Return t if buffer has been auto-saved since last read in or saved. | |
| 4326 */ | |
| 4327 ()) | |
| 4328 { | |
| 4329 return (BUF_SAVE_MODIFF (current_buffer) < | |
| 4330 current_buffer->auto_save_modified) ? Qt : Qnil; | |
| 4331 } | |
| 4332 | |
| 4333 | |
| 4334 /************************************************************************/ | |
| 4335 /* initialization */ | |
| 4336 /************************************************************************/ | |
| 4337 | |
| 4338 void | |
| 4339 syms_of_fileio (void) | |
| 4340 { | |
| 563 | 4341 DEFSYMBOL (Qexpand_file_name); |
| 4342 DEFSYMBOL (Qfile_truename); | |
| 4343 DEFSYMBOL (Qsubstitute_in_file_name); | |
| 4344 DEFSYMBOL (Qdirectory_file_name); | |
| 4345 DEFSYMBOL (Qfile_name_directory); | |
| 4346 DEFSYMBOL (Qfile_name_nondirectory); | |
| 996 | 4347 DEFSYMBOL (Qfile_name_sans_extension); |
| 563 | 4348 DEFSYMBOL (Qunhandled_file_name_directory); |
| 4349 DEFSYMBOL (Qfile_name_as_directory); | |
| 4350 DEFSYMBOL (Qcopy_file); | |
| 4351 DEFSYMBOL (Qmake_directory_internal); | |
| 4352 DEFSYMBOL (Qdelete_directory); | |
| 4353 DEFSYMBOL (Qdelete_file); | |
| 4354 DEFSYMBOL (Qrename_file); | |
| 4355 DEFSYMBOL (Qadd_name_to_file); | |
| 4356 DEFSYMBOL (Qmake_symbolic_link); | |
| 844 | 4357 DEFSYMBOL (Qmake_temp_name); |
| 563 | 4358 DEFSYMBOL (Qfile_exists_p); |
| 4359 DEFSYMBOL (Qfile_executable_p); | |
| 4360 DEFSYMBOL (Qfile_readable_p); | |
| 4361 DEFSYMBOL (Qfile_symlink_p); | |
| 4362 DEFSYMBOL (Qfile_writable_p); | |
| 4363 DEFSYMBOL (Qfile_directory_p); | |
| 4364 DEFSYMBOL (Qfile_regular_p); | |
| 4365 DEFSYMBOL (Qfile_accessible_directory_p); | |
| 4366 DEFSYMBOL (Qfile_modes); | |
| 4367 DEFSYMBOL (Qset_file_modes); | |
| 4368 DEFSYMBOL (Qfile_newer_than_file_p); | |
| 4369 DEFSYMBOL (Qinsert_file_contents); | |
| 4370 DEFSYMBOL (Qwrite_region); | |
| 4371 DEFSYMBOL (Qverify_visited_file_modtime); | |
| 4372 DEFSYMBOL (Qset_visited_file_modtime); | |
| 4373 DEFSYMBOL (Qcar_less_than_car); /* Vomitous! */ | |
| 4266 | 4374 DEFSYMBOL (Qexcl); |
| 563 | 4375 |
| 4376 DEFSYMBOL (Qauto_save_hook); | |
| 4377 DEFSYMBOL (Qauto_save_error); | |
| 4378 DEFSYMBOL (Qauto_saving); | |
| 4379 | |
| 4380 DEFSYMBOL (Qformat_decode); | |
| 4381 DEFSYMBOL (Qformat_annotate_function); | |
| 4382 | |
| 4383 DEFSYMBOL (Qcompute_buffer_file_truename); | |
| 4384 | |
| 442 | 4385 DEFERROR_STANDARD (Qfile_already_exists, Qfile_error); |
| 428 | 4386 |
| 4387 DEFSUBR (Ffind_file_name_handler); | |
| 4388 | |
| 4389 DEFSUBR (Ffile_name_directory); | |
| 4390 DEFSUBR (Ffile_name_nondirectory); | |
| 4391 DEFSUBR (Funhandled_file_name_directory); | |
| 4392 DEFSUBR (Ffile_name_as_directory); | |
| 4393 DEFSUBR (Fdirectory_file_name); | |
| 4394 DEFSUBR (Fmake_temp_name); | |
| 4395 DEFSUBR (Fexpand_file_name); | |
| 4396 DEFSUBR (Ffile_truename); | |
| 4397 DEFSUBR (Fsubstitute_in_file_name); | |
| 4398 DEFSUBR (Fcopy_file); | |
| 4399 DEFSUBR (Fmake_directory_internal); | |
| 4400 DEFSUBR (Fdelete_directory); | |
| 4401 DEFSUBR (Fdelete_file); | |
| 4402 DEFSUBR (Frename_file); | |
| 4403 DEFSUBR (Fadd_name_to_file); | |
| 4404 DEFSUBR (Fmake_symbolic_link); | |
| 4405 #ifdef HPUX_NET | |
| 4406 DEFSUBR (Fsysnetunam); | |
| 4407 #endif /* HPUX_NET */ | |
| 4408 DEFSUBR (Ffile_name_absolute_p); | |
| 4409 DEFSUBR (Ffile_exists_p); | |
| 4410 DEFSUBR (Ffile_executable_p); | |
| 4411 DEFSUBR (Ffile_readable_p); | |
| 4412 DEFSUBR (Ffile_writable_p); | |
| 4413 DEFSUBR (Ffile_symlink_p); | |
| 4414 DEFSUBR (Ffile_directory_p); | |
| 4415 DEFSUBR (Ffile_accessible_directory_p); | |
| 4416 DEFSUBR (Ffile_regular_p); | |
| 4417 DEFSUBR (Ffile_modes); | |
| 4418 DEFSUBR (Fset_file_modes); | |
| 4419 DEFSUBR (Fset_default_file_modes); | |
| 4420 DEFSUBR (Fdefault_file_modes); | |
| 4421 DEFSUBR (Funix_sync); | |
| 4422 DEFSUBR (Ffile_newer_than_file_p); | |
| 4423 DEFSUBR (Finsert_file_contents_internal); | |
| 4424 DEFSUBR (Fwrite_region_internal); | |
| 4425 #if 0 | |
| 4426 DEFSUBR (Fencrypt_string); | |
| 4427 DEFSUBR (Fdecrypt_string); | |
| 4428 #endif | |
| 4429 DEFSUBR (Fverify_visited_file_modtime); | |
| 4430 DEFSUBR (Fclear_visited_file_modtime); | |
| 4431 DEFSUBR (Fvisited_file_modtime); | |
| 4432 DEFSUBR (Fset_visited_file_modtime); | |
| 4433 | |
| 4434 DEFSUBR (Fdo_auto_save); | |
| 4435 DEFSUBR (Fset_buffer_auto_saved); | |
| 4436 DEFSUBR (Fclear_buffer_auto_save_failure); | |
| 4437 DEFSUBR (Frecent_auto_save_p); | |
| 4438 } | |
| 4439 | |
| 4440 void | |
| 4441 vars_of_fileio (void) | |
| 4442 { | |
| 2526 | 4443 QSin_expand_file_name = |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4867
diff
changeset
|
4444 build_defer_string ("(in expand-file-name)"); |
| 2526 | 4445 staticpro (&QSin_expand_file_name); |
| 4446 | |
| 428 | 4447 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /* |
| 4448 *Format in which to write auto-save files. | |
| 4449 Should be a list of symbols naming formats that are defined in `format-alist'. | |
| 4450 If it is t, which is the default, auto-save files are written in the | |
| 4451 same format as a regular save would use. | |
| 4452 */ ); | |
| 4453 Vauto_save_file_format = Qt; | |
| 4454 | |
| 4455 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /* | |
| 4456 *Alist of elements (REGEXP . HANDLER) for file names handled specially. | |
| 4457 If a file name matches REGEXP, then all I/O on that file is done by calling | |
| 4458 HANDLER. | |
| 4459 | |
| 4460 The first argument given to HANDLER is the name of the I/O primitive | |
| 4461 to be handled; the remaining arguments are the arguments that were | |
| 4462 passed to that primitive. For example, if you do | |
| 4463 (file-exists-p FILENAME) | |
| 4464 and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
| 4465 (funcall HANDLER 'file-exists-p FILENAME) | |
| 4466 The function `find-file-name-handler' checks this list for a handler | |
| 4467 for its argument. | |
| 4468 */ ); | |
| 4469 Vfile_name_handler_alist = Qnil; | |
| 4470 | |
| 4471 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /* | |
| 4472 A list of functions to be called at the end of `insert-file-contents'. | |
| 4473 Each is passed one argument, the number of bytes inserted. It should return | |
| 4474 the new byte count, and leave point the same. If `insert-file-contents' is | |
| 4475 intercepted by a handler from `file-name-handler-alist', that handler is | |
| 4476 responsible for calling the after-insert-file-functions if appropriate. | |
| 4477 */ ); | |
| 4478 Vafter_insert_file_functions = Qnil; | |
| 4479 | |
| 4480 DEFVAR_LISP ("write-region-annotate-functions", | |
| 4481 &Vwrite_region_annotate_functions /* | |
| 4482 A list of functions to be called at the start of `write-region'. | |
| 4483 Each is passed two arguments, START and END, as for `write-region'. | |
| 4484 It should return a list of pairs (POSITION . STRING) of strings to be | |
| 4485 effectively inserted at the specified positions of the file being written | |
| 4486 \(1 means to insert before the first byte written). The POSITIONs must be | |
| 4487 sorted into increasing order. If there are several functions in the list, | |
| 4488 the several lists are merged destructively. | |
| 4489 */ ); | |
| 4490 Vwrite_region_annotate_functions = Qnil; | |
| 4491 | |
| 4492 DEFVAR_LISP ("write-region-annotations-so-far", | |
| 4493 &Vwrite_region_annotations_so_far /* | |
| 4494 When an annotation function is called, this holds the previous annotations. | |
| 4495 These are the annotations made by other annotation functions | |
| 4496 that were already called. See also `write-region-annotate-functions'. | |
| 4497 */ ); | |
| 4498 Vwrite_region_annotations_so_far = Qnil; | |
| 4499 | |
| 4500 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /* | |
| 4501 A list of file name handlers that temporarily should not be used. | |
| 4502 This applies only to the operation `inhibit-file-name-operation'. | |
| 4503 */ ); | |
| 4504 Vinhibit_file_name_handlers = Qnil; | |
| 4505 | |
| 4506 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /* | |
| 4507 The operation for which `inhibit-file-name-handlers' is applicable. | |
| 4508 */ ); | |
| 4509 Vinhibit_file_name_operation = Qnil; | |
| 4510 | |
| 4511 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /* | |
| 4512 File name in which we write a list of all auto save file names. | |
| 4513 */ ); | |
| 4514 Vauto_save_list_file_name = Qnil; | |
| 4515 | |
|
4499
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4516 #ifdef HAVE_FSYNC |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4517 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>
parents:
4465
diff
changeset
|
4518 *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
|
4519 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
|
4520 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
|
4521 */ ); |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4522 write_region_inhibit_fsync = 0; |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4523 #endif |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4524 |
| 444 | 4525 DEFVAR_LISP ("auto-save-list-file-prefix", &Vauto_save_list_file_prefix /* |
| 4526 Prefix for generating auto-save-list-file-name. | |
| 4527 Emacs's pid and the system name will be appended to | |
| 4528 this prefix to create a unique file name. | |
| 4529 */ ); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4867
diff
changeset
|
4530 Vauto_save_list_file_prefix = build_ascstring ("~/.saves-"); |
| 444 | 4531 |
| 4532 DEFVAR_BOOL ("inhibit-auto-save-session", &inhibit_auto_save_session /* | |
| 4533 When non-nil, inhibit auto save list file creation. | |
| 4534 */ ); | |
| 4535 inhibit_auto_save_session = 0; | |
| 4536 | |
| 428 | 4537 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks", |
| 4538 &disable_auto_save_when_buffer_shrinks /* | |
| 4539 If non-nil, auto-saving is disabled when a buffer shrinks too much. | |
| 4540 This is to prevent you from losing your edits if you accidentally | |
| 4541 delete a large chunk of the buffer and don't notice it until too late. | |
| 4542 Saving the buffer normally turns auto-save back on. | |
| 4543 */ ); | |
| 4544 disable_auto_save_when_buffer_shrinks = 1; | |
| 4545 | |
| 4546 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /* | |
| 4547 Directory separator character for built-in functions that return file names. | |
| 4548 The value should be either ?/ or ?\\ (any other value is treated as ?\\). | |
| 4549 This variable affects the built-in functions only on Windows, | |
| 4550 on other platforms, it is initialized so that Lisp code can find out | |
| 4551 what the normal separator is. | |
| 4552 */ ); | |
| 771 | 4553 Vdirectory_sep_char = make_char (DEFAULT_DIRECTORY_SEP); |
| 428 | 4554 } |
| 442 | 4555 |
| 4556 void | |
| 4557 reinit_vars_of_fileio (void) | |
| 4558 { | |
| 4559 /* We want temp_name_rand to be initialized to a value likely to be | |
| 4560 unique to the process, not to the executable. The danger is that | |
| 4561 two different XEmacs processes using the same binary on different | |
| 4562 machines creating temp files in the same directory will be | |
| 4563 unlucky enough to have the same pid. If we randomize using | |
| 4564 process startup time, then in practice they will be unlikely to | |
| 4565 collide. We use the microseconds field so that scripts that start | |
| 4566 simultaneous XEmacs processes on multiple machines will have less | |
| 4567 chance of collision. */ | |
| 4568 { | |
| 4569 EMACS_TIME thyme; | |
| 4570 | |
| 4571 EMACS_GET_TIME (thyme); | |
| 4572 temp_name_rand = (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme)); | |
| 4573 } | |
| 4574 } |