Mercurial > hg > xemacs-beta
annotate src/fileio.c @ 4826:780bb5441c14
use call3_check_string on all invocations of external handlers in expand-file-name
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sat, 26 Dec 2009 21:04:32 -0600 |
| parents | c12b646d84ee |
| children | b3ea9c582280 |
| rev | line source |
|---|---|
| 428 | 1 /* File IO for XEmacs. |
| 2 Copyright (C) 1985-1988, 1992-1995 Free Software Foundation, Inc. | |
| 2367 | 3 Copyright (C) 1996, 2001, 2002, 2003, 2004 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 | |
|
4499
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Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
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changeset
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111 #ifdef HAVE_FSYNC |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
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112 /* Nonzero means skip the call to fsync in Fwrite-region. */ |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
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113 int write_region_inhibit_fsync; |
|
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parents:
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changeset
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114 #endif |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
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changeset
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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 /* DATA can be anything acceptable to signal_error (). |
| 142 */ | |
| 143 | |
| 144 DOESNT_RETURN | |
| 145 report_file_type_error (Lisp_Object errtype, Lisp_Object oserrmess, | |
| 867 | 146 const CIbyte *string, Lisp_Object data) |
| 563 | 147 { |
| 148 struct gcpro gcpro1; | |
| 149 Lisp_Object errdata = build_error_data (NULL, data); | |
| 150 | |
| 151 GCPRO1 (errdata); | |
| 771 | 152 errdata = Fcons (build_msg_string (string), |
| 563 | 153 Fcons (oserrmess, errdata)); |
| 154 signal_error_1 (errtype, errdata); | |
| 801 | 155 /* UNGCPRO; not reached */ |
| 563 | 156 } |
| 157 | |
| 158 DOESNT_RETURN | |
| 159 report_error_with_errno (Lisp_Object errtype, | |
| 867 | 160 const CIbyte *string, Lisp_Object data) |
| 563 | 161 { |
| 162 report_file_type_error (errtype, lisp_strerror (errno), string, data); | |
| 163 } | |
| 164 | |
| 428 | 165 /* signal a file error when errno contains a meaningful value. */ |
| 166 | |
| 167 DOESNT_RETURN | |
| 867 | 168 report_file_error (const CIbyte *string, Lisp_Object data) |
| 428 | 169 { |
| 563 | 170 report_error_with_errno (Qfile_error, string, data); |
| 428 | 171 } |
| 172 | |
| 173 | |
| 174 /* Just like strerror(3), except return a lisp string instead of char *. | |
| 175 The string needs to be converted since it may be localized. | |
| 771 | 176 */ |
| 428 | 177 Lisp_Object |
| 178 lisp_strerror (int errnum) | |
| 179 { | |
| 771 | 180 Extbyte *ret = strerror (errnum); |
| 181 if (!ret) | |
| 182 { | |
| 867 | 183 Ibyte ffff[99]; |
| 771 | 184 qxesprintf (ffff, "Unknown error %d", errnum); |
| 185 return build_intstring (ffff); | |
| 186 } | |
| 187 return build_ext_string (ret, Qstrerror_encoding); | |
| 428 | 188 } |
| 189 | |
| 190 static Lisp_Object | |
| 191 close_file_unwind (Lisp_Object fd) | |
| 192 { | |
| 193 if (CONSP (fd)) | |
| 194 { | |
| 195 if (INTP (XCAR (fd))) | |
| 771 | 196 retry_close (XINT (XCAR (fd))); |
| 428 | 197 |
| 853 | 198 free_cons (fd); |
| 428 | 199 } |
| 200 else | |
| 771 | 201 retry_close (XINT (fd)); |
| 428 | 202 |
| 203 return Qnil; | |
| 204 } | |
| 205 | |
| 206 static Lisp_Object | |
| 207 delete_stream_unwind (Lisp_Object stream) | |
| 208 { | |
| 209 Lstream_delete (XLSTREAM (stream)); | |
| 210 return Qnil; | |
| 211 } | |
| 212 | |
| 213 /* Restore point, having saved it as a marker. */ | |
| 214 | |
| 215 static Lisp_Object | |
| 216 restore_point_unwind (Lisp_Object point_marker) | |
| 217 { | |
| 218 BUF_SET_PT (current_buffer, marker_position (point_marker)); | |
| 219 return Fset_marker (point_marker, Qnil, Qnil); | |
| 220 } | |
| 221 | |
| 222 | |
| 223 Lisp_Object Qexpand_file_name; | |
| 224 Lisp_Object Qfile_truename; | |
| 225 Lisp_Object Qsubstitute_in_file_name; | |
| 226 Lisp_Object Qdirectory_file_name; | |
| 227 Lisp_Object Qfile_name_directory; | |
| 228 Lisp_Object Qfile_name_nondirectory; | |
| 996 | 229 Lisp_Object Qfile_name_sans_extension; |
| 428 | 230 Lisp_Object Qunhandled_file_name_directory; |
| 231 Lisp_Object Qfile_name_as_directory; | |
| 232 Lisp_Object Qcopy_file; | |
| 233 Lisp_Object Qmake_directory_internal; | |
| 234 Lisp_Object Qdelete_directory; | |
| 235 Lisp_Object Qdelete_file; | |
| 236 Lisp_Object Qrename_file; | |
| 237 Lisp_Object Qadd_name_to_file; | |
| 238 Lisp_Object Qmake_symbolic_link; | |
| 844 | 239 Lisp_Object Qmake_temp_name; |
| 428 | 240 Lisp_Object Qfile_exists_p; |
| 241 Lisp_Object Qfile_executable_p; | |
| 242 Lisp_Object Qfile_readable_p; | |
| 243 Lisp_Object Qfile_symlink_p; | |
| 244 Lisp_Object Qfile_writable_p; | |
| 245 Lisp_Object Qfile_directory_p; | |
| 246 Lisp_Object Qfile_regular_p; | |
| 247 Lisp_Object Qfile_accessible_directory_p; | |
| 248 Lisp_Object Qfile_modes; | |
| 249 Lisp_Object Qset_file_modes; | |
| 250 Lisp_Object Qfile_newer_than_file_p; | |
| 251 Lisp_Object Qinsert_file_contents; | |
| 252 Lisp_Object Qwrite_region; | |
| 253 Lisp_Object Qverify_visited_file_modtime; | |
| 254 Lisp_Object Qset_visited_file_modtime; | |
| 255 | |
| 256 /* If FILENAME is handled specially on account of its syntax, | |
| 257 return its handler function. Otherwise, return nil. */ | |
| 258 | |
| 259 DEFUN ("find-file-name-handler", Ffind_file_name_handler, 1, 2, 0, /* | |
| 260 Return FILENAME's handler function for OPERATION, if it has one. | |
| 261 Otherwise, return nil. | |
| 262 A file name is handled if one of the regular expressions in | |
| 263 `file-name-handler-alist' matches it. | |
| 264 | |
| 265 If OPERATION equals `inhibit-file-name-operation', then we ignore | |
| 266 any handlers that are members of `inhibit-file-name-handlers', | |
| 267 but we still do run any other handlers. This lets handlers | |
| 268 use the standard functions without calling themselves recursively. | |
| 751 | 269 |
| 270 Otherwise, OPERATION is the name of a funcall'able function. | |
| 428 | 271 */ |
| 272 (filename, operation)) | |
| 273 { | |
| 274 /* This function does not GC */ | |
| 275 /* This function can be called during GC */ | |
| 276 /* This function must not munge the match data. */ | |
| 2367 | 277 Lisp_Object inhibited_handlers; |
| 428 | 278 |
| 279 CHECK_STRING (filename); | |
| 280 | |
| 281 if (EQ (operation, Vinhibit_file_name_operation)) | |
| 282 inhibited_handlers = Vinhibit_file_name_handlers; | |
| 283 else | |
| 284 inhibited_handlers = Qnil; | |
| 285 | |
| 2367 | 286 { |
| 287 EXTERNAL_LIST_LOOP_2 (elt, Vfile_name_handler_alist) | |
| 288 { | |
| 289 if (CONSP (elt)) | |
| 290 { | |
| 291 Lisp_Object string = XCAR (elt); | |
| 292 if (STRINGP (string) | |
| 293 && (fast_lisp_string_match (string, filename) >= 0)) | |
| 294 { | |
| 295 Lisp_Object handler = XCDR (elt); | |
| 296 if (NILP (Fmemq (handler, inhibited_handlers))) | |
| 297 return handler; | |
| 298 } | |
| 299 } | |
| 300 } | |
| 301 } | |
| 428 | 302 return Qnil; |
| 303 } | |
| 304 | |
| 305 static Lisp_Object | |
| 306 call2_check_string (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 307 { | |
| 308 /* This function can call lisp */ | |
| 309 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 310 CHECK_STRING (result); | |
| 311 return result; | |
| 312 } | |
| 313 | |
| 314 static Lisp_Object | |
| 315 call2_check_string_or_nil (Lisp_Object fn, Lisp_Object arg0, Lisp_Object arg1) | |
| 316 { | |
| 317 /* This function can call lisp */ | |
| 318 Lisp_Object result = call2 (fn, arg0, arg1); | |
| 319 if (!NILP (result)) | |
| 320 CHECK_STRING (result); | |
| 321 return result; | |
| 322 } | |
| 323 | |
| 324 static Lisp_Object | |
| 325 call3_check_string (Lisp_Object fn, Lisp_Object arg0, | |
| 326 Lisp_Object arg1, Lisp_Object arg2) | |
| 327 { | |
| 328 /* This function can call lisp */ | |
| 329 Lisp_Object result = call3 (fn, arg0, arg1, arg2); | |
| 330 CHECK_STRING (result); | |
| 331 return result; | |
| 332 } | |
| 333 | |
| 334 | |
| 2526 | 335 |
| 336 Ibyte * | |
| 337 find_end_of_directory_component (const Ibyte *path, Bytecount len) | |
| 338 { | |
| 339 const Ibyte *p = path + len; | |
| 340 | |
| 341 while (p != path && !IS_DIRECTORY_SEP (p[-1]) | |
| 342 #ifdef WIN32_FILENAMES | |
| 343 /* only recognise drive specifier at the beginning */ | |
| 344 && !(p[-1] == ':' | |
| 345 /* handle the "/:d:foo" and "/:foo" cases correctly */ | |
| 346 && ((p == path + 2 && !IS_DIRECTORY_SEP (*path)) | |
| 347 || (p == path + 4 && IS_DIRECTORY_SEP (*path)))) | |
| 348 #endif | |
| 349 ) p--; | |
| 350 | |
| 351 return (Ibyte *) p; | |
| 352 } | |
| 353 | |
| 428 | 354 DEFUN ("file-name-directory", Ffile_name_directory, 1, 1, 0, /* |
| 444 | 355 Return the directory component in file name FILENAME. |
| 356 Return nil if FILENAME does not include a directory. | |
| 428 | 357 Otherwise return a directory spec. |
| 358 Given a Unix syntax file name, returns a string ending in slash. | |
| 359 */ | |
| 444 | 360 (filename)) |
| 428 | 361 { |
| 442 | 362 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 363 /* This function synched with Emacs 21.0.103. */ |
| 867 | 364 Ibyte *beg; |
| 365 Ibyte *p; | |
| 428 | 366 Lisp_Object handler; |
| 367 | |
| 444 | 368 CHECK_STRING (filename); |
| 428 | 369 |
| 370 /* If the file name has special constructs in it, | |
| 371 call the corresponding file handler. */ | |
| 444 | 372 handler = Ffind_file_name_handler (filename, Qfile_name_directory); |
| 428 | 373 if (!NILP (handler)) |
| 444 | 374 return call2_check_string_or_nil (handler, Qfile_name_directory, filename); |
| 428 | 375 |
| 376 #ifdef FILE_SYSTEM_CASE | |
| 444 | 377 filename = FILE_SYSTEM_CASE (filename); |
| 428 | 378 #endif |
| 444 | 379 beg = XSTRING_DATA (filename); |
| 771 | 380 /* XEmacs: no need to alloca-copy here */ |
| 2526 | 381 p = find_end_of_directory_component (beg, XSTRING_LENGTH (filename)); |
| 428 | 382 |
| 383 if (p == beg) | |
| 384 return Qnil; | |
| 442 | 385 #ifdef WIN32_NATIVE |
| 428 | 386 /* Expansion of "c:" to drive and default directory. */ |
| 771 | 387 if (p[-1] == ':') |
| 428 | 388 { |
| 867 | 389 Ibyte *res; |
| 390 Ibyte *wd = mswindows_getdcwd (toupper (*beg) - 'A' + 1); | |
| 771 | 391 |
| 2367 | 392 res = alloca_ibytes ((wd ? qxestrlen (wd) : 0) + 10); /* go overboard */ |
| 1116 | 393 res[0] = '\0'; |
| 771 | 394 if (p == beg + 4 && IS_DIRECTORY_SEP (*beg) && beg[1] == ':') |
| 395 { | |
| 396 qxestrncpy (res, beg, 2); | |
| 397 beg += 2; | |
| 1116 | 398 res[2] = '\0'; |
| 771 | 399 } |
| 400 | |
| 401 if (wd) | |
| 428 | 402 { |
| 3648 | 403 int size; |
| 771 | 404 qxestrcat (res, wd); |
| 3648 | 405 size = qxestrlen (res); |
| 406 if (!IS_DIRECTORY_SEP (res[size - 1])) | |
| 407 { | |
| 408 res[size] = DIRECTORY_SEP; | |
| 409 res[size + 1] = '\0'; | |
| 410 } | |
| 428 | 411 beg = res; |
| 771 | 412 p = beg + qxestrlen (beg); |
| 428 | 413 } |
| 3648 | 414 else |
| 415 { | |
| 416 return Qnil; | |
| 417 } | |
| 771 | 418 if (wd) |
| 1726 | 419 xfree (wd, Ibyte *); |
| 428 | 420 } |
| 771 | 421 |
| 422 #if 0 /* No! This screws up efs, which calls file-name-directory on URL's | |
| 423 and expects the slashes to be left alone. This is here because of | |
| 424 an analogous call in FSF 21. */ | |
| 425 { | |
| 426 Bytecount len = p - beg; | |
| 867 | 427 Ibyte *newbeg = alloca_ibytes (len + 1); |
| 771 | 428 |
| 429 qxestrncpy (newbeg, beg, len); | |
| 430 newbeg[len] = '\0'; | |
| 431 newbeg = mswindows_canonicalize_filename (newbeg); | |
| 1726 | 432 return build_intstring (newbeg); |
| 771 | 433 } |
| 434 #endif | |
| 435 #endif /* not WIN32_NATIVE */ | |
| 428 | 436 return make_string (beg, p - beg); |
| 437 } | |
| 438 | |
| 439 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, 1, 1, 0, /* | |
| 444 | 440 Return file name FILENAME sans its directory. |
| 428 | 441 For example, in a Unix-syntax file name, |
| 442 this is everything after the last slash, | |
| 443 or the entire name if it contains no slash. | |
| 444 */ | |
| 444 | 445 (filename)) |
| 428 | 446 { |
| 442 | 447 /* This function can GC. GC checked 2000-07-28 ben */ |
| 771 | 448 /* This function synched with Emacs 21.0.103. */ |
| 867 | 449 Ibyte *beg, *p, *end; |
| 428 | 450 Lisp_Object handler; |
| 451 | |
| 444 | 452 CHECK_STRING (filename); |
| 428 | 453 |
| 454 /* If the file name has special constructs in it, | |
| 455 call the corresponding file handler. */ | |
| 444 | 456 handler = Ffind_file_name_handler (filename, Qfile_name_nondirectory); |
| 428 | 457 if (!NILP (handler)) |
| 444 | 458 return call2_check_string (handler, Qfile_name_nondirectory, filename); |
| 459 | |
| 460 beg = XSTRING_DATA (filename); | |
| 461 end = p = beg + XSTRING_LENGTH (filename); | |
| 428 | 462 |
| 771 | 463 while (p != beg && !IS_DIRECTORY_SEP (p[-1]) |
| 657 | 464 #ifdef WIN32_FILENAMES |
| 771 | 465 /* only recognise drive specifier at beginning */ |
| 466 && !(p[-1] == ':' | |
| 467 /* handle the "/:d:foo" case correctly */ | |
| 468 && (p == beg + 2 || (p == beg + 4 && IS_DIRECTORY_SEP (*beg)))) | |
| 428 | 469 #endif |
| 771 | 470 ) |
| 471 p--; | |
| 428 | 472 |
| 473 return make_string (p, end - p); | |
| 474 } | |
| 475 | |
| 476 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, 1, 1, 0, /* | |
| 477 Return a directly usable directory name somehow associated with FILENAME. | |
| 478 A `directly usable' directory name is one that may be used without the | |
| 479 intervention of any file handler. | |
| 480 If FILENAME is a directly usable file itself, return | |
| 481 \(file-name-directory FILENAME). | |
| 482 The `call-process' and `start-process' functions use this function to | |
| 483 get a current directory to run processes in. | |
| 484 */ | |
| 444 | 485 (filename)) |
| 428 | 486 { |
| 442 | 487 /* This function can GC. GC checked 2000-07-28 ben */ |
| 428 | 488 Lisp_Object handler; |
| 489 | |
| 490 /* If the file name has special constructs in it, | |
| 491 call the corresponding file handler. */ | |
| 492 handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); | |
| 493 if (!NILP (handler)) | |
| 494 return call2 (handler, Qunhandled_file_name_directory, | |
| 495 filename); | |
| 496 | |
| 497 return Ffile_name_directory (filename); | |
| 498 } | |
| 499 | |
| 500 | |
| 867 | 501 static Ibyte * |
| 502 file_name_as_directory (Ibyte *out, Ibyte *in) | |
| 428 | 503 { |
| 442 | 504 /* This function cannot GC */ |
| 771 | 505 int size = qxestrlen (in); |
| 428 | 506 |
| 507 if (size == 0) | |
| 508 { | |
| 509 out[0] = '.'; | |
| 510 out[1] = DIRECTORY_SEP; | |
| 511 out[2] = '\0'; | |
| 512 } | |
| 513 else | |
| 514 { | |
| 771 | 515 qxestrcpy (out, in); |
| 428 | 516 /* Append a slash if necessary */ |
| 517 if (!IS_ANY_SEP (out[size-1])) | |
| 518 { | |
| 519 out[size] = DIRECTORY_SEP; | |
| 520 out[size + 1] = '\0'; | |
| 521 } | |
| 522 } | |
| 523 return out; | |
| 524 } | |
| 525 | |
| 526 DEFUN ("file-name-as-directory", Ffile_name_as_directory, 1, 1, 0, /* | |
| 527 Return a string representing file FILENAME interpreted as a directory. | |
| 528 This operation exists because a directory is also a file, but its name as | |
| 529 a directory is different from its name as a file. | |
| 530 The result can be used as the value of `default-directory' | |
| 531 or passed as second argument to `expand-file-name'. | |
| 532 For a Unix-syntax file name, just appends a slash, | |
| 533 except for (file-name-as-directory \"\") => \"./\". | |
| 534 */ | |
| 444 | 535 (filename)) |
| 428 | 536 { |
| 442 | 537 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 538 Ibyte *buf; |
| 428 | 539 Lisp_Object handler; |
| 540 | |
| 444 | 541 CHECK_STRING (filename); |
| 428 | 542 |
| 543 /* If the file name has special constructs in it, | |
| 544 call the corresponding file handler. */ | |
| 444 | 545 handler = Ffind_file_name_handler (filename, Qfile_name_as_directory); |
| 428 | 546 if (!NILP (handler)) |
| 444 | 547 return call2_check_string (handler, Qfile_name_as_directory, filename); |
| 548 | |
| 867 | 549 buf = alloca_ibytes (XSTRING_LENGTH (filename) + 10); |
| 2526 | 550 file_name_as_directory (buf, XSTRING_DATA (filename)); |
| 551 if (qxestrcmp (buf, XSTRING_DATA (filename))) | |
| 552 return build_intstring (buf); | |
| 553 else | |
| 554 return filename; | |
| 428 | 555 } |
| 556 | |
| 557 /* | |
| 558 * Convert from directory name to filename. | |
| 559 * On UNIX, it's simple: just make sure there isn't a terminating / | |
| 560 * | |
| 561 * Value is nonzero if the string output is different from the input. | |
| 562 */ | |
| 563 | |
| 564 static int | |
| 867 | 565 directory_file_name (const Ibyte *src, Ibyte *dst) |
| 428 | 566 { |
| 442 | 567 /* This function cannot GC */ |
| 771 | 568 long slen = qxestrlen (src); |
| 428 | 569 /* Process as Unix format: just remove any final slash. |
| 570 But leave "/" unchanged; do not change it to "". */ | |
| 771 | 571 qxestrcpy (dst, src); |
| 428 | 572 if (slen > 1 |
| 573 && IS_DIRECTORY_SEP (dst[slen - 1]) | |
| 657 | 574 #ifdef WIN32_FILENAMES |
| 428 | 575 && !IS_ANY_SEP (dst[slen - 2]) |
| 657 | 576 #endif /* WIN32_FILENAMES */ |
| 428 | 577 ) |
| 578 dst[slen - 1] = 0; | |
| 579 return 1; | |
| 580 } | |
| 581 | |
| 582 DEFUN ("directory-file-name", Fdirectory_file_name, 1, 1, 0, /* | |
| 444 | 583 Return the file name of the directory named DIRECTORY. |
| 584 This is the name of the file that holds the data for the directory. | |
| 428 | 585 This operation exists because a directory is also a file, but its name as |
| 586 a directory is different from its name as a file. | |
| 587 In Unix-syntax, this function just removes the final slash. | |
| 588 */ | |
| 589 (directory)) | |
| 590 { | |
| 442 | 591 /* This function can GC. GC checked 2000-07-28 ben */ |
| 867 | 592 Ibyte *buf; |
| 428 | 593 Lisp_Object handler; |
| 594 | |
| 595 CHECK_STRING (directory); | |
| 596 | |
| 597 #if 0 /* #### WTF? */ | |
| 598 if (NILP (directory)) | |
| 599 return Qnil; | |
| 600 #endif | |
| 601 | |
| 602 /* If the file name has special constructs in it, | |
| 603 call the corresponding file handler. */ | |
| 604 handler = Ffind_file_name_handler (directory, Qdirectory_file_name); | |
| 605 if (!NILP (handler)) | |
| 606 return call2_check_string (handler, Qdirectory_file_name, directory); | |
| 2367 | 607 buf = alloca_ibytes (XSTRING_LENGTH (directory) + 20); |
| 771 | 608 directory_file_name (XSTRING_DATA (directory), buf); |
| 609 return build_intstring (buf); | |
| 428 | 610 } |
| 611 | |
| 612 /* Fmake_temp_name used to be a simple wrapper around mktemp(), but it | |
| 613 proved too broken for our purposes (it supported only 26 or 62 | |
| 614 unique names under some implementations). For example, this | |
| 615 arbitrary limit broke generation of Gnus Incoming* files. | |
| 616 | |
| 617 This implementation is better than what one usually finds in libc. | |
| 618 --hniksic */ | |
| 619 | |
| 442 | 620 static unsigned int temp_name_rand; |
| 621 | |
| 428 | 622 DEFUN ("make-temp-name", Fmake_temp_name, 1, 1, 0, /* |
| 442 | 623 Generate a temporary file name starting with PREFIX. |
| 428 | 624 The Emacs process number forms part of the result, so there is no |
| 625 danger of generating a name being used by another process. | |
| 626 | |
| 627 In addition, this function makes an attempt to choose a name that | |
| 628 does not specify an existing file. To make this work, PREFIX should | |
| 4266 | 629 be an absolute file name. |
| 630 | |
| 631 This function is analagous to mktemp(3) under POSIX, and as with it, there | |
| 632 exists a race condition between the test for the existence of the new file | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4324
diff
changeset
|
633 and its creation. See `make-temp-file' for a function which avoids this |
| 4266 | 634 race condition by specifying the appropriate flags to `write-region'. |
| 428 | 635 */ |
| 636 (prefix)) | |
| 637 { | |
| 442 | 638 static const char tbl[64] = |
| 639 { | |
| 428 | 640 'A','B','C','D','E','F','G','H', |
| 641 'I','J','K','L','M','N','O','P', | |
| 642 'Q','R','S','T','U','V','W','X', | |
| 643 'Y','Z','a','b','c','d','e','f', | |
| 644 'g','h','i','j','k','l','m','n', | |
| 645 'o','p','q','r','s','t','u','v', | |
| 646 'w','x','y','z','0','1','2','3', | |
| 442 | 647 '4','5','6','7','8','9','-','_' |
| 648 }; | |
| 428 | 649 |
| 650 Bytecount len; | |
| 867 | 651 Ibyte *p, *data; |
| 844 | 652 Lisp_Object handler; |
| 428 | 653 |
| 654 CHECK_STRING (prefix); | |
| 844 | 655 handler = Ffind_file_name_handler (prefix, Qmake_temp_name); |
| 656 if (!NILP (handler)) | |
| 657 return call2_check_string (handler, Qmake_temp_name, prefix); | |
| 428 | 658 |
| 659 /* I was tempted to apply Fexpand_file_name on PREFIX here, but it's | |
| 660 a bad idea because: | |
| 661 | |
| 662 1) It might change the prefix, so the resulting string might not | |
| 663 begin with PREFIX. This violates the principle of least | |
| 664 surprise. | |
| 665 | |
| 666 2) It breaks under many unforeseeable circumstances, such as with | |
| 667 the code that uses (make-temp-name "") instead of | |
| 668 (make-temp-name "./"). | |
| 669 | |
| 844 | 670 [[ 3) It might yield unexpected (to stat(2)) results in the presence |
| 671 of EFS and file name handlers.]] Now that we check for a handler, | |
| 672 that's less of a concern. --ben */ | |
| 428 | 673 |
| 674 len = XSTRING_LENGTH (prefix); | |
| 867 | 675 data = alloca_ibytes (len + 7); |
| 428 | 676 memcpy (data, XSTRING_DATA (prefix), len); |
| 677 p = data + len; | |
| 771 | 678 p[6] = '\0'; |
| 428 | 679 |
| 680 /* VAL is created by adding 6 characters to PREFIX. The first three | |
| 681 are the PID of this process, in base 64, and the second three are | |
| 442 | 682 a pseudo-random number seeded from process startup time. This |
| 683 ensures 262144 unique file names per PID per PREFIX per machine. */ | |
| 684 | |
| 685 { | |
| 771 | 686 unsigned int pid = (unsigned int) qxe_getpid (); |
| 442 | 687 *p++ = tbl[(pid >> 0) & 63]; |
| 688 *p++ = tbl[(pid >> 6) & 63]; | |
| 689 *p++ = tbl[(pid >> 12) & 63]; | |
| 690 } | |
| 428 | 691 |
| 692 /* Here we try to minimize useless stat'ing when this function is | |
| 693 invoked many times successively with the same PREFIX. We achieve | |
| 442 | 694 this by using a very pseudo-random number generator to generate |
| 695 file names unique to this process, with a very long cycle. */ | |
| 428 | 696 |
| 697 while (1) | |
| 698 { | |
| 699 struct stat ignored; | |
| 442 | 700 |
| 701 p[0] = tbl[(temp_name_rand >> 0) & 63]; | |
| 702 p[1] = tbl[(temp_name_rand >> 6) & 63]; | |
| 703 p[2] = tbl[(temp_name_rand >> 12) & 63]; | |
| 428 | 704 |
| 705 /* Poor man's congruential RN generator. Replace with ++count | |
| 706 for debugging. */ | |
| 442 | 707 temp_name_rand += 25229; |
| 708 temp_name_rand %= 225307; | |
| 428 | 709 |
| 710 QUIT; | |
| 711 | |
| 771 | 712 if (qxe_stat (data, &ignored) < 0) |
| 428 | 713 { |
| 714 /* We want to return only if errno is ENOENT. */ | |
| 715 if (errno == ENOENT) | |
| 771 | 716 return make_string (data, len + 6); |
| 428 | 717 |
| 718 /* The error here is dubious, but there is little else we | |
| 719 can do. The alternatives are to return nil, which is | |
| 720 as bad as (and in many cases worse than) throwing the | |
| 721 error, or to ignore the error, which will likely result | |
| 722 in inflooping. */ | |
| 723 report_file_error ("Cannot create temporary name for prefix", | |
| 563 | 724 prefix); |
| 428 | 725 return Qnil; /* not reached */ |
| 726 } | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 | |
| 771 | 731 |
| 428 | 732 DEFUN ("expand-file-name", Fexpand_file_name, 1, 2, 0, /* |
| 733 Convert filename NAME to absolute, and canonicalize it. | |
| 734 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative | |
| 735 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing, | |
| 444 | 736 the current buffer's value of `default-directory' is used. |
| 428 | 737 File name components that are `.' are removed, and |
| 738 so are file name components followed by `..', along with the `..' itself; | |
| 739 note that these simplifications are done without checking the resulting | |
| 740 file names in the file system. | |
| 741 An initial `~/' expands to your home directory. | |
| 742 An initial `~USER/' expands to USER's home directory. | |
| 743 See also the function `substitute-in-file-name'. | |
| 744 */ | |
| 745 (name, default_directory)) | |
| 746 { | |
| 771 | 747 /* This function can GC. GC-checked 2000-11-18. |
| 748 This function synched with Emacs 21.0.103. */ | |
| 867 | 749 Ibyte *nm; |
| 750 | |
| 751 Ibyte *newdir, *p, *o; | |
| 428 | 752 int tlen; |
| 867 | 753 Ibyte *target; |
| 657 | 754 #ifdef WIN32_FILENAMES |
| 428 | 755 int drive = 0; |
| 756 int collapse_newdir = 1; | |
| 771 | 757 /* XEmacs note: This concerns the special '/:' syntax for preventing |
| 758 wildcards and such. We don't support this currently but I'm | |
| 759 keeping the code here in case we do. */ | |
| 760 int is_escaped = 0; | |
| 657 | 761 #endif |
| 762 #ifndef WIN32_NATIVE | |
| 428 | 763 struct passwd *pw; |
| 771 | 764 #endif |
| 428 | 765 int length; |
| 446 | 766 Lisp_Object handler = Qnil; |
| 767 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2526 | 768 PROFILE_DECLARE (); |
| 769 | |
| 770 PROFILE_RECORD_ENTERING_SECTION (QSin_expand_file_name); | |
| 442 | 771 |
| 772 /* both of these get set below */ | |
| 446 | 773 GCPRO3 (name, default_directory, handler); |
| 428 | 774 |
| 775 CHECK_STRING (name); | |
| 776 | |
| 777 /* If the file name has special constructs in it, | |
| 778 call the corresponding file handler. */ | |
| 779 handler = Ffind_file_name_handler (name, Qexpand_file_name); | |
| 780 if (!NILP (handler)) | |
| 2526 | 781 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 782 call3_check_string | |
| 783 (handler, Qexpand_file_name, | |
| 784 name, default_directory)); | |
| 428 | 785 |
| 786 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */ | |
| 787 if (NILP (default_directory)) | |
| 788 default_directory = current_buffer->directory; | |
| 789 if (! STRINGP (default_directory)) | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4499
diff
changeset
|
790 default_directory = build_string (DEFAULT_DIRECTORY_FALLBACK); |
| 428 | 791 |
| 792 if (!NILP (default_directory)) | |
| 793 { | |
| 794 handler = Ffind_file_name_handler (default_directory, Qexpand_file_name); | |
| 795 if (!NILP (handler)) | |
| 2526 | 796 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
|
4826
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use call3_check_string on all invocations of external handlers in expand-file-name
Ben Wing <ben@xemacs.org>
parents:
4824
diff
changeset
|
797 call3_check_string |
|
780bb5441c14
use call3_check_string on all invocations of external handlers in expand-file-name
Ben Wing <ben@xemacs.org>
parents:
4824
diff
changeset
|
798 (handler, Qexpand_file_name, |
|
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use call3_check_string on all invocations of external handlers in expand-file-name
Ben Wing <ben@xemacs.org>
parents:
4824
diff
changeset
|
799 name, default_directory)); |
| 428 | 800 } |
| 801 | |
| 802 o = XSTRING_DATA (default_directory); | |
| 803 | |
| 804 /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
| 805 It would be better to do this down below where we actually use | |
| 806 default_directory. Unfortunately, calling Fexpand_file_name recursively | |
| 807 could invoke GC, and the strings might be relocated. This would | |
| 808 be annoying because we have pointers into strings lying around | |
| 809 that would need adjusting, and people would add new pointers to | |
| 810 the code and forget to adjust them, resulting in intermittent bugs. | |
| 811 Putting this call here avoids all that crud. | |
| 812 | |
| 813 The EQ test avoids infinite recursion. */ | |
| 814 if (! NILP (default_directory) && !EQ (default_directory, name) | |
| 815 /* Save time in some common cases - as long as default_directory | |
| 816 is not relative, it can be canonicalized with name below (if it | |
| 817 is needed at all) without requiring it to be expanded now. */ | |
| 657 | 818 #ifdef WIN32_FILENAMES |
| 442 | 819 /* Detect Windows file names with drive specifiers. */ |
| 428 | 820 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2]))) |
| 821 /* Detect Windows file names in UNC format. */ | |
| 822 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
| 657 | 823 #endif /* not WIN32_FILENAMES */ |
| 824 #ifndef WIN32_NATIVE | |
| 428 | 825 /* Detect Unix absolute file names (/... alone is not absolute on |
| 442 | 826 Windows). */ |
| 428 | 827 && ! (IS_DIRECTORY_SEP (o[0])) |
| 442 | 828 #endif /* not WIN32_NATIVE */ |
| 428 | 829 ) |
| 442 | 830 |
| 831 default_directory = Fexpand_file_name (default_directory, Qnil); | |
| 428 | 832 |
| 833 #ifdef FILE_SYSTEM_CASE | |
| 834 name = FILE_SYSTEM_CASE (name); | |
| 835 #endif | |
| 836 | |
| 837 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing | |
| 838 into name should be safe during all of this, though. */ | |
| 839 nm = XSTRING_DATA (name); | |
| 840 | |
| 657 | 841 #ifdef WIN32_FILENAMES |
| 428 | 842 /* We will force directory separators to be either all \ or /, so make |
| 843 a local copy to modify, even if there ends up being no change. */ | |
| 867 | 844 nm = qxestrcpy (alloca_ibytes (qxestrlen (nm) + 1), nm); |
| 771 | 845 |
| 846 /* Note if special escape prefix is present, but remove for now. */ | |
| 847 if (nm[0] == '/' && nm[1] == ':') | |
| 848 { | |
| 849 is_escaped = 1; | |
| 850 nm += 2; | |
| 851 } | |
| 428 | 852 |
| 853 /* Find and remove drive specifier if present; this makes nm absolute | |
| 854 even if the rest of the name appears to be relative. */ | |
| 855 { | |
| 867 | 856 Ibyte *colon = qxestrrchr (nm, ':'); |
| 428 | 857 |
| 858 if (colon) | |
| 657 | 859 { |
| 428 | 860 /* Only recognize colon as part of drive specifier if there is a |
| 861 single alphabetic character preceding the colon (and if the | |
| 862 character before the drive letter, if present, is a directory | |
| 863 separator); this is to support the remote system syntax used by | |
| 864 ange-ftp, and the "po:username" syntax for POP mailboxes. */ | |
| 865 look_again: | |
| 866 if (nm == colon) | |
| 867 nm++; | |
| 868 else if (IS_DRIVE (colon[-1]) | |
| 869 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2]))) | |
| 870 { | |
| 871 drive = colon[-1]; | |
| 872 nm = colon + 1; | |
| 873 } | |
| 874 else | |
| 875 { | |
| 876 while (--colon >= nm) | |
| 877 if (colon[0] == ':') | |
| 878 goto look_again; | |
| 879 } | |
| 657 | 880 } |
| 428 | 881 } |
| 882 | |
| 883 /* If we see "c://somedir", we want to strip the first slash after the | |
| 884 colon when stripping the drive letter. Otherwise, this expands to | |
| 885 "//somedir". */ | |
| 886 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 887 nm++; | |
| 657 | 888 #endif /* WIN32_FILENAMES */ |
| 428 | 889 |
| 771 | 890 #ifdef WIN32_FILENAMES |
| 891 /* Discard any previous drive specifier if nm is now in UNC format. */ | |
| 892 if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 893 { | |
| 894 drive = 0; | |
| 895 } | |
| 896 #endif | |
| 897 | |
| 428 | 898 /* If nm is absolute, look for /./ or /../ sequences; if none are |
| 899 found, we can probably return right away. We will avoid allocating | |
| 900 a new string if name is already fully expanded. */ | |
| 901 if ( | |
| 902 IS_DIRECTORY_SEP (nm[0]) | |
| 442 | 903 #ifdef WIN32_NATIVE |
| 771 | 904 && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
| 428 | 905 #endif |
| 906 ) | |
| 907 { | |
| 908 /* If it turns out that the filename we want to return is just a | |
| 909 suffix of FILENAME, we don't need to go through and edit | |
| 910 things; we just need to construct a new string using data | |
| 911 starting at the middle of FILENAME. If we set lose to a | |
| 912 non-zero value, that means we've discovered that we can't do | |
| 913 that cool trick. */ | |
| 914 int lose = 0; | |
| 915 | |
| 916 p = nm; | |
| 917 while (*p) | |
| 918 { | |
| 919 /* Since we know the name is absolute, we can assume that each | |
| 920 element starts with a "/". */ | |
| 921 | |
| 922 /* "." and ".." are hairy. */ | |
| 923 if (IS_DIRECTORY_SEP (p[0]) | |
| 924 && p[1] == '.' | |
| 925 && (IS_DIRECTORY_SEP (p[2]) | |
| 926 || p[2] == 0 | |
| 927 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) | |
| 928 || p[3] == 0)))) | |
| 929 lose = 1; | |
| 771 | 930 /* We want to replace multiple `/' in a row with a single |
| 931 slash. */ | |
| 932 else if (p > nm | |
| 933 && IS_DIRECTORY_SEP (p[0]) | |
| 934 && IS_DIRECTORY_SEP (p[1])) | |
| 935 lose = 1; | |
| 428 | 936 p++; |
| 937 } | |
| 938 if (!lose) | |
| 939 { | |
| 657 | 940 #ifdef WIN32_FILENAMES |
| 941 if (drive || IS_DIRECTORY_SEP (nm[1])) | |
| 428 | 942 { |
| 867 | 943 Ibyte *newnm; |
| 771 | 944 |
| 657 | 945 if (IS_DIRECTORY_SEP (nm[1])) |
| 946 { | |
| 771 | 947 newnm = mswindows_canonicalize_filename (nm); |
| 948 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 949 name = build_intstring (newnm); | |
| 657 | 950 } |
| 771 | 951 else |
| 657 | 952 { |
| 771 | 953 /* drive must be set, so this is okay */ |
| 954 newnm = mswindows_canonicalize_filename (nm - 2); | |
| 955 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 956 { | |
| 957 name = build_intstring (newnm); | |
| 958 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive); | |
| 959 XSTRING_DATA (name)[1] = ':'; | |
| 960 } | |
| 657 | 961 } |
| 1726 | 962 xfree (newnm, Ibyte *); |
| 2526 | 963 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 428 | 964 } |
| 771 | 965 #endif /* WIN32_FILENAMES */ |
| 657 | 966 #ifndef WIN32_NATIVE |
| 428 | 967 if (nm == XSTRING_DATA (name)) |
| 2526 | 968 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 969 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, | |
| 970 build_intstring (nm)); | |
| 442 | 971 #endif /* not WIN32_NATIVE */ |
| 428 | 972 } |
| 973 } | |
| 974 | |
| 975 /* At this point, nm might or might not be an absolute file name. We | |
| 976 need to expand ~ or ~user if present, otherwise prefix nm with | |
| 977 default_directory if nm is not absolute, and finally collapse /./ | |
| 978 and /foo/../ sequences. | |
| 979 | |
| 980 We set newdir to be the appropriate prefix if one is needed: | |
| 981 - the relevant user directory if nm starts with ~ or ~user | |
| 982 - the specified drive's working dir (DOS/NT only) if nm does not | |
| 983 start with / | |
| 984 - the value of default_directory. | |
| 985 | |
| 986 Note that these prefixes are not guaranteed to be absolute (except | |
| 987 for the working dir of a drive). Therefore, to ensure we always | |
| 988 return an absolute name, if the final prefix is not absolute we | |
| 989 append it to the current working directory. */ | |
| 990 | |
| 991 newdir = 0; | |
| 992 | |
| 993 if (nm[0] == '~') /* prefix ~ */ | |
| 994 { | |
| 995 if (IS_DIRECTORY_SEP (nm[1]) | |
| 996 || nm[1] == 0) /* ~ by itself */ | |
| 997 { | |
| 867 | 998 Ibyte *homedir = get_home_directory (); |
| 771 | 999 |
| 1000 if (!homedir) | |
| 867 | 1001 newdir = (Ibyte *) ""; |
| 428 | 1002 else |
| 771 | 1003 newdir = homedir; |
| 428 | 1004 |
| 1005 nm++; | |
| 657 | 1006 #ifdef WIN32_FILENAMES |
| 428 | 1007 collapse_newdir = 0; |
| 1008 #endif | |
| 1009 } | |
| 1010 else /* ~user/filename */ | |
| 1011 { | |
| 1012 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++) | |
| 1013 DO_NOTHING; | |
| 2367 | 1014 o = alloca_ibytes (p - nm + 1); |
| 771 | 1015 memcpy (o, nm, p - nm); |
| 428 | 1016 o [p - nm] = 0; |
| 1017 | |
| 558 | 1018 /* #### While NT is single-user (for the moment) you still |
| 1019 can have multiple user profiles users defined, each with | |
| 1020 its HOME. So maybe possibly we should think about handling | |
| 1021 ~user. --ben */ | |
| 1022 #ifndef WIN32_NATIVE | |
| 442 | 1023 #ifdef CYGWIN |
| 771 | 1024 { |
| 867 | 1025 Ibyte *user; |
| 771 | 1026 |
| 1027 if ((user = user_login_name (NULL)) != NULL) | |
| 1028 { | |
| 1029 /* Does the user login name match the ~name? */ | |
| 1030 if (qxestrcmp (user, o + 1) == 0) | |
| 1031 { | |
| 1032 newdir = get_home_directory (); | |
| 1033 nm = p; | |
| 1034 } | |
| 1035 } | |
| 1036 } | |
| 1037 if (!newdir) | |
| 428 | 1038 { |
| 442 | 1039 #endif /* CYGWIN */ |
| 428 | 1040 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM |
| 1041 occurring in it. (It can call select()). */ | |
| 1042 slow_down_interrupts (); | |
| 771 | 1043 pw = (struct passwd *) qxe_getpwnam (o + 1); |
| 428 | 1044 speed_up_interrupts (); |
| 1045 if (pw) | |
| 1046 { | |
| 867 | 1047 newdir = (Ibyte *) pw->pw_dir; |
| 428 | 1048 nm = p; |
| 771 | 1049 /* FSF: if WIN32_NATIVE, collapse_newdir = 0; |
| 1050 not possible here. */ | |
| 428 | 1051 } |
| 442 | 1052 #ifdef CYGWIN |
| 428 | 1053 } |
| 1054 #endif | |
| 442 | 1055 #endif /* not WIN32_NATIVE */ |
| 428 | 1056 |
| 1057 /* If we don't find a user of that name, leave the name | |
| 1058 unchanged; don't move nm forward to p. */ | |
| 1059 } | |
| 1060 } | |
| 1061 | |
| 657 | 1062 #ifdef WIN32_FILENAMES |
| 428 | 1063 /* On DOS and Windows, nm is absolute if a drive name was specified; |
| 1064 use the drive's current directory as the prefix if needed. */ | |
| 1065 if (!newdir && drive) | |
| 1066 { | |
| 657 | 1067 #ifdef WIN32_NATIVE |
| 428 | 1068 /* Get default directory if needed to make nm absolute. */ |
| 1069 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1070 { | |
| 867 | 1071 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1072 if (newcwd) |
| 1073 { | |
| 867 | 1074 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
| 1726 | 1075 xfree (newcwd, Ibyte *); |
| 771 | 1076 } |
| 1077 else | |
| 428 | 1078 newdir = NULL; |
| 1079 } | |
| 657 | 1080 #endif /* WIN32_NATIVE */ |
| 428 | 1081 if (!newdir) |
| 1082 { | |
| 1083 /* Either nm starts with /, or drive isn't mounted. */ | |
| 2367 | 1084 newdir = alloca_ibytes (4); |
| 428 | 1085 newdir[0] = DRIVE_LETTER (drive); |
| 1086 newdir[1] = ':'; | |
| 1087 newdir[2] = '/'; | |
| 1088 newdir[3] = 0; | |
| 1089 } | |
| 1090 } | |
| 657 | 1091 #endif /* WIN32_FILENAMES */ |
| 428 | 1092 |
| 1093 /* Finally, if no prefix has been specified and nm is not absolute, | |
| 1094 then it must be expanded relative to default_directory. */ | |
| 1095 | |
| 1096 if (1 | |
| 442 | 1097 #ifndef WIN32_NATIVE |
| 428 | 1098 /* /... alone is not absolute on DOS and Windows. */ |
| 1099 && !IS_DIRECTORY_SEP (nm[0]) | |
| 657 | 1100 #endif |
| 1101 #ifdef WIN32_FILENAMES | |
| 428 | 1102 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 1103 #endif | |
| 1104 && !newdir) | |
| 1105 { | |
| 1106 newdir = XSTRING_DATA (default_directory); | |
| 771 | 1107 #ifdef WIN32_FILENAMES |
| 1108 /* Note if special escape prefix is present, but remove for now. */ | |
| 1109 if (newdir[0] == '/' && newdir[1] == ':') | |
| 1110 { | |
| 1111 is_escaped = 1; | |
| 1112 newdir += 2; | |
| 1113 } | |
| 1114 #endif | |
| 428 | 1115 } |
| 1116 | |
| 657 | 1117 #ifdef WIN32_FILENAMES |
| 428 | 1118 if (newdir) |
| 1119 { | |
| 1120 /* First ensure newdir is an absolute name. */ | |
| 1121 if ( | |
| 442 | 1122 /* Detect Windows file names with drive specifiers. */ |
| 428 | 1123 ! (IS_DRIVE (newdir[0]) |
| 1124 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
| 1125 /* Detect Windows file names in UNC format. */ | |
| 1126 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 771 | 1127 /* XEmacs: added these two lines: Detect drive spec by itself */ |
| 428 | 1128 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0) |
| 657 | 1129 /* Detect unix format. */ |
| 1130 #ifndef WIN32_NATIVE | |
| 1131 && ! (IS_DIRECTORY_SEP (newdir[0])) | |
| 1132 #endif | |
| 428 | 1133 ) |
| 1134 { | |
| 1135 /* Effectively, let newdir be (expand-file-name newdir cwd). | |
| 1136 Because of the admonition against calling expand-file-name | |
| 1137 when we have pointers into lisp strings, we accomplish this | |
| 1138 indirectly by prepending newdir to nm if necessary, and using | |
| 1139 cwd (or the wd of newdir's drive) as the new newdir. */ | |
| 1140 | |
| 1141 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1142 { | |
| 1143 drive = newdir[0]; | |
| 1144 newdir += 2; | |
| 1145 } | |
| 1146 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1147 { | |
| 2367 | 1148 Ibyte *tmp = alloca_ibytes (qxestrlen (newdir) + |
| 1149 qxestrlen (nm) + 2); | |
| 771 | 1150 file_name_as_directory (tmp, newdir); |
| 1151 qxestrcat (tmp, nm); | |
| 428 | 1152 nm = tmp; |
| 1153 } | |
| 1154 if (drive) | |
| 1155 { | |
| 657 | 1156 #ifdef WIN32_NATIVE |
| 867 | 1157 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1158 if (newcwd) |
| 1159 { | |
| 867 | 1160 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
| 1726 | 1161 xfree (newcwd, Ibyte *); |
| 771 | 1162 } |
| 1163 else | |
| 657 | 1164 #endif |
| 867 | 1165 IBYTE_STRING_TO_ALLOCA ((Ibyte *) "/", newdir); |
| 428 | 1166 } |
| 1167 else | |
| 867 | 1168 IBYTE_STRING_TO_ALLOCA (get_initial_directory (0, 0), newdir); |
| 428 | 1169 } |
| 1170 | |
| 1171 /* Strip off drive name from prefix, if present. */ | |
| 1172 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1173 { | |
| 1174 drive = newdir[0]; | |
| 1175 newdir += 2; | |
| 1176 } | |
| 1177 | |
| 1178 /* Keep only a prefix from newdir if nm starts with slash | |
| 771 | 1179 (//server/share for UNC, nothing otherwise). */ |
| 657 | 1180 if (IS_DIRECTORY_SEP (nm[0]) |
| 1181 #ifndef WIN32_NATIVE | |
| 1182 && IS_DIRECTORY_SEP (nm[1]) | |
| 1183 #endif | |
| 1184 && collapse_newdir) | |
| 428 | 1185 { |
| 1186 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 1187 { | |
| 2367 | 1188 /* !!#### Use ei API */ |
| 1189 newdir = qxestrcpy (alloca_ibytes (qxestrlen (newdir) + 1), | |
| 1190 newdir); | |
| 428 | 1191 p = newdir + 2; |
| 1192 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1193 p++; | |
| 1194 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1195 *p = 0; | |
| 1196 } | |
| 1197 else | |
| 867 | 1198 newdir = (Ibyte *) ""; |
| 428 | 1199 } |
| 1200 } | |
| 657 | 1201 #endif /* WIN32_FILENAMES */ |
| 428 | 1202 |
| 1203 if (newdir) | |
| 1204 { | |
| 1205 /* Get rid of any slash at the end of newdir, unless newdir is | |
| 771 | 1206 just / or // (an incomplete UNC name). */ |
| 1207 length = qxestrlen (newdir); | |
| 428 | 1208 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
| 657 | 1209 #ifdef WIN32_FILENAMES |
| 428 | 1210 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) |
| 1211 #endif | |
| 1212 ) | |
| 1213 { | |
| 2367 | 1214 Ibyte *temp = alloca_ibytes (length); |
| 428 | 1215 memcpy (temp, newdir, length - 1); |
| 1216 temp[length - 1] = 0; | |
| 1217 newdir = temp; | |
| 1218 } | |
| 1219 tlen = length + 1; | |
| 1220 } | |
| 1221 else | |
| 1222 tlen = 0; | |
| 1223 | |
| 1224 /* Now concatenate the directory and name to new space in the stack frame */ | |
| 771 | 1225 tlen += qxestrlen (nm) + 1; |
| 657 | 1226 #ifdef WIN32_FILENAMES |
| 771 | 1227 /* Reserve space for drive specifier and escape prefix, since either |
| 1228 or both may need to be inserted. (The Microsoft x86 compiler | |
| 428 | 1229 produces incorrect code if the following two lines are combined.) */ |
| 2367 | 1230 target = alloca_ibytes (tlen + 4); |
| 771 | 1231 target += 4; |
| 657 | 1232 #else /* not WIN32_FILENAMES */ |
| 2367 | 1233 target = alloca_ibytes (tlen); |
| 657 | 1234 #endif /* not WIN32_FILENAMES */ |
| 428 | 1235 *target = 0; |
| 1236 | |
| 1237 if (newdir) | |
| 1238 { | |
| 1239 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) | |
| 771 | 1240 { |
| 1241 #ifdef WIN32_FILENAMES | |
| 1242 /* If newdir is effectively "C:/", then the drive letter will have | |
| 1243 been stripped and newdir will be "/". Concatenating with an | |
| 1244 absolute directory in nm produces "//", which will then be | |
| 1245 incorrectly treated as a network share. Ignore newdir in | |
| 1246 this case (keeping the drive letter). */ | |
| 1247 if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) | |
| 1248 && newdir[1] == '\0')) | |
| 1249 #endif | |
| 1250 qxestrcpy (target, newdir); | |
| 1251 } | |
| 428 | 1252 else |
| 771 | 1253 file_name_as_directory (target, newdir); |
| 428 | 1254 } |
| 1255 | |
| 771 | 1256 qxestrcat (target, nm); |
| 428 | 1257 |
| 1258 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ | |
| 1259 | |
| 771 | 1260 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
| 1261 appear. */ | |
| 428 | 1262 |
| 1263 p = target; | |
| 1264 o = target; | |
| 1265 | |
| 1266 while (*p) | |
| 1267 { | |
| 1268 if (!IS_DIRECTORY_SEP (*p)) | |
| 1269 { | |
| 1270 *o++ = *p++; | |
| 1271 } | |
| 1272 else if (IS_DIRECTORY_SEP (p[0]) | |
| 1273 && p[1] == '.' | |
| 1274 && (IS_DIRECTORY_SEP (p[2]) | |
| 1275 || p[2] == 0)) | |
| 1276 { | |
| 1277 /* If "/." is the entire filename, keep the "/". Otherwise, | |
| 1278 just delete the whole "/.". */ | |
| 1279 if (o == target && p[2] == '\0') | |
| 1280 *o++ = *p; | |
| 1281 p += 2; | |
| 1282 } | |
| 1283 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.' | |
| 1284 /* `/../' is the "superroot" on certain file systems. */ | |
| 1285 && o != target | |
| 1286 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) | |
| 1287 { | |
| 1288 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) | |
| 1289 ; | |
| 1290 /* Keep initial / only if this is the whole name. */ | |
| 1291 if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
| 1292 ++o; | |
| 1293 p += 3; | |
| 1294 } | |
| 771 | 1295 else if (p > target |
| 1296 && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1297 { | |
| 1298 /* Collapse multiple `/' in a row. */ | |
| 1299 *o++ = *p++; | |
| 1300 while (IS_DIRECTORY_SEP (*p)) | |
| 1301 ++p; | |
| 1302 } | |
| 428 | 1303 else |
| 1304 { | |
| 1305 *o++ = *p++; | |
| 1306 } | |
| 1307 } | |
| 1308 | |
| 657 | 1309 #ifdef WIN32_FILENAMES |
| 428 | 1310 /* At last, set drive name, except for network file name. */ |
| 1311 if (drive) | |
| 1312 { | |
| 1313 target -= 2; | |
| 1314 target[0] = DRIVE_LETTER (drive); | |
| 1315 target[1] = ':'; | |
| 1316 } | |
| 657 | 1317 #ifdef WIN32_NATIVE |
| 428 | 1318 else |
| 1319 { | |
| 1320 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1])); | |
| 1321 } | |
| 657 | 1322 #endif |
| 771 | 1323 /* Reinsert the escape prefix if required. */ |
| 1324 if (is_escaped) | |
| 1325 { | |
| 1326 target -= 2; | |
| 1327 target[0] = '/'; | |
| 1328 target[1] = ':'; | |
| 1329 } | |
| 1330 | |
| 1331 *o = '\0'; | |
| 1332 | |
| 1333 { | |
| 867 | 1334 Ibyte *newtarget = mswindows_canonicalize_filename (target); |
| 771 | 1335 Lisp_Object result = build_intstring (newtarget); |
| 1726 | 1336 xfree (newtarget, Ibyte *); |
| 771 | 1337 |
| 2526 | 1338 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, result); |
| 771 | 1339 } |
| 1340 #else /* not WIN32_FILENAMES */ | |
| 2526 | 1341 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 1342 make_string (target, o - target)); | |
| 771 | 1343 #endif /* not WIN32_FILENAMES */ |
| 428 | 1344 } |
| 1345 | |
| 1346 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /* | |
| 444 | 1347 Return the canonical name of FILENAME. |
| 1348 Second arg DEFAULT is directory to start with if FILENAME is relative | |
| 428 | 1349 (does not start with slash); if DEFAULT is nil or missing, |
| 444 | 1350 the current buffer's value of `default-directory' is used. |
| 428 | 1351 No component of the resulting pathname will be a symbolic link, as |
| 1352 in the realpath() function. | |
| 1353 */ | |
| 1354 (filename, default_)) | |
| 1355 { | |
| 442 | 1356 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 428 | 1357 Lisp_Object expanded_name; |
| 1358 struct gcpro gcpro1; | |
| 1359 | |
| 1360 CHECK_STRING (filename); | |
| 1361 | |
| 1362 expanded_name = Fexpand_file_name (filename, default_); | |
| 1363 | |
| 1364 if (!STRINGP (expanded_name)) | |
| 1365 return Qnil; | |
| 1366 | |
| 1367 GCPRO1 (expanded_name); | |
| 442 | 1368 |
| 1369 { | |
| 1370 Lisp_Object handler = | |
| 1371 Ffind_file_name_handler (expanded_name, Qfile_truename); | |
| 1372 | |
| 1373 if (!NILP (handler)) | |
| 1374 RETURN_UNGCPRO | |
| 1375 (call2_check_string (handler, Qfile_truename, expanded_name)); | |
| 1376 } | |
| 428 | 1377 |
| 1378 { | |
| 2421 | 1379 Ibyte resolved_path[PATH_MAX_INTERNAL]; |
| 771 | 1380 Bytecount elen = XSTRING_LENGTH (expanded_name); |
| 867 | 1381 Ibyte *path; |
| 1382 Ibyte *p; | |
| 771 | 1383 |
| 1384 LISP_STRING_TO_ALLOCA (expanded_name, path); | |
| 988 | 1385 |
| 1111 | 1386 #if defined (WIN32_FILENAMES) && defined (CYGWIN) |
| 988 | 1387 /* When using win32 filenames in cygwin we want file-truename to |
| 1388 detect that c:/windows == /windows for example. */ | |
| 1111 | 1389 if (! (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))) |
| 1390 { | |
| 1391 LOCAL_TO_WIN32_FILE_FORMAT (path, p); | |
| 1392 path = p; | |
| 1393 } | |
| 988 | 1394 #endif |
| 428 | 1395 p = path; |
| 442 | 1396 |
| 428 | 1397 /* Try doing it all at once. */ |
| 2526 | 1398 if (!qxe_realpath (path, resolved_path, 0)) |
| 428 | 1399 { |
| 1400 /* Didn't resolve it -- have to do it one component at a time. */ | |
| 1401 /* "realpath" is a typically useless, stupid un*x piece of crap. | |
| 1402 It claims to return a useful value in the "error" case, but since | |
| 1403 there is no indication provided of how far along the pathname | |
| 1404 the function went before erring, there is no way to use the | |
| 442 | 1405 partial result returned. What a piece of junk. |
| 1406 | |
| 1407 The above comment refers to historical versions of | |
| 1408 realpath(). The Unix98 specs state: | |
| 1409 | |
| 1410 "On successful completion, realpath() returns a | |
| 1411 pointer to the resolved name. Otherwise, realpath() | |
| 1412 returns a null pointer and sets errno to indicate the | |
| 1413 error, and the contents of the buffer pointed to by | |
| 1414 resolved_name are undefined." | |
| 1415 | |
| 771 | 1416 Since we depend on undocumented semantics of various system |
| 2526 | 1417 realpath()s, we just use our own version in realpath.c. |
| 1418 | |
| 1419 Note also that our own version differs in its semantics from any | |
| 1420 standard version, since it accepts and returns internal-format | |
| 1421 text, not external-format. */ | |
| 428 | 1422 for (;;) |
| 1423 { | |
| 867 | 1424 Ibyte *pos; |
| 446 | 1425 |
| 657 | 1426 #ifdef WIN32_FILENAMES |
| 446 | 1427 if (IS_DRIVE (p[0]) && IS_DEVICE_SEP (p[1]) |
| 1428 && IS_DIRECTORY_SEP (p[2])) | |
| 1429 /* don't test c: on windows */ | |
| 1430 p = p+2; | |
| 1431 else if (IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1432 /* start after // */ | |
| 1433 p = p+1; | |
| 1434 #endif | |
| 1435 for (pos = p + 1; pos < path + elen; pos++) | |
| 1436 if (IS_DIRECTORY_SEP (*pos)) | |
| 1437 { | |
| 1438 *(p = pos) = 0; | |
| 1439 break; | |
| 1440 } | |
| 1441 if (p != pos) | |
| 1442 p = 0; | |
| 428 | 1443 |
| 2526 | 1444 if (qxe_realpath (path, resolved_path, 0)) |
| 428 | 1445 { |
| 1446 if (p) | |
| 446 | 1447 *p = DIRECTORY_SEP; |
| 428 | 1448 else |
| 1449 break; | |
| 1450 | |
| 1451 } | |
| 1452 else if (errno == ENOENT || errno == EACCES) | |
| 1453 { | |
| 1454 /* Failed on this component. Just tack on the rest of | |
| 1455 the string and we are done. */ | |
| 771 | 1456 int rlen = qxestrlen (resolved_path); |
| 428 | 1457 |
| 1458 /* "On failure, it returns NULL, sets errno to indicate | |
| 1459 the error, and places in resolved_path the absolute pathname | |
| 1460 of the path component which could not be resolved." */ | |
| 442 | 1461 |
| 1462 if (p) | |
| 428 | 1463 { |
| 1464 int plen = elen - (p - path); | |
| 1465 | |
| 446 | 1466 if (rlen > 1 && IS_DIRECTORY_SEP (resolved_path[rlen - 1])) |
| 428 | 1467 rlen = rlen - 1; |
| 1468 | |
| 1469 if (plen + rlen + 1 > countof (resolved_path)) | |
| 1470 goto toolong; | |
| 1471 | |
| 446 | 1472 resolved_path[rlen] = DIRECTORY_SEP; |
| 428 | 1473 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1); |
| 1474 } | |
| 1475 break; | |
| 1476 } | |
| 1477 else | |
| 1478 goto lose; | |
| 1479 } | |
| 1480 } | |
| 1481 | |
| 1482 { | |
| 442 | 1483 Lisp_Object resolved_name; |
| 771 | 1484 int rlen = qxestrlen (resolved_path); |
| 826 | 1485 if (elen > 0 && IS_DIRECTORY_SEP (string_byte (expanded_name, elen - 1)) |
| 446 | 1486 && !(rlen > 0 && IS_DIRECTORY_SEP (resolved_path[rlen - 1]))) |
| 428 | 1487 { |
| 1488 if (rlen + 1 > countof (resolved_path)) | |
| 1489 goto toolong; | |
| 446 | 1490 resolved_path[rlen++] = DIRECTORY_SEP; |
| 442 | 1491 resolved_path[rlen] = '\0'; |
| 428 | 1492 } |
| 771 | 1493 resolved_name = make_string (resolved_path, rlen); |
| 442 | 1494 RETURN_UNGCPRO (resolved_name); |
| 428 | 1495 } |
| 1496 | |
| 1497 toolong: | |
| 1498 errno = ENAMETOOLONG; | |
| 1499 goto lose; | |
| 1500 lose: | |
| 563 | 1501 report_file_error ("Finding truename", expanded_name); |
| 428 | 1502 } |
| 442 | 1503 RETURN_UNGCPRO (Qnil); |
| 428 | 1504 } |
| 1505 | |
| 1506 | |
| 1507 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /* | |
| 1508 Substitute environment variables referred to in FILENAME. | |
| 1509 `$FOO' where FOO is an environment variable name means to substitute | |
| 1510 the value of that variable. The variable name should be terminated | |
| 444 | 1511 with a character, not a letter, digit or underscore; otherwise, enclose |
| 428 | 1512 the entire variable name in braces. |
| 1513 If `/~' appears, all of FILENAME through that `/' is discarded. | |
| 1514 */ | |
| 444 | 1515 (filename)) |
| 428 | 1516 { |
| 442 | 1517 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 867 | 1518 Ibyte *nm; |
| 1519 | |
|
4324
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4266
diff
changeset
|
1520 Ibyte *s, *p, *o, *x, *endp, *got; |
| 867 | 1521 Ibyte *target = 0; |
| 428 | 1522 int total = 0; |
|
4324
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4266
diff
changeset
|
1523 int substituted = 0, seen_braces; |
| 867 | 1524 Ibyte *xnm; |
| 428 | 1525 Lisp_Object handler; |
| 1526 | |
| 444 | 1527 CHECK_STRING (filename); |
| 428 | 1528 |
| 1529 /* If the file name has special constructs in it, | |
| 1530 call the corresponding file handler. */ | |
| 444 | 1531 handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
| 428 | 1532 if (!NILP (handler)) |
| 1533 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name, | |
| 444 | 1534 filename); |
| 1535 | |
| 1536 nm = XSTRING_DATA (filename); | |
| 1537 endp = nm + XSTRING_LENGTH (filename); | |
| 428 | 1538 |
| 1539 /* If /~ or // appears, discard everything through first slash. */ | |
| 1540 | |
| 1541 for (p = nm; p != endp; p++) | |
| 1542 { | |
| 1543 if ((p[0] == '~' | |
| 657 | 1544 #if defined (WIN32_FILENAMES) |
| 440 | 1545 /* // at start of file name is meaningful in WindowsNT systems */ |
| 428 | 1546 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm) |
| 657 | 1547 #else /* not (WIN32_FILENAMES) */ |
| 428 | 1548 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1549 #endif /* not (WIN32_FILENAMES) */ |
| 428 | 1550 ) |
| 1551 && p != nm | |
| 1552 && (IS_DIRECTORY_SEP (p[-1]))) | |
| 1553 { | |
| 1554 nm = p; | |
| 1555 substituted = 1; | |
| 1556 } | |
| 657 | 1557 #ifdef WIN32_FILENAMES |
| 428 | 1558 /* see comment in expand-file-name about drive specifiers */ |
| 1559 else if (IS_DRIVE (p[0]) && p[1] == ':' | |
| 1560 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1561 { | |
| 1562 nm = p; | |
| 1563 substituted = 1; | |
| 1564 } | |
| 657 | 1565 #endif /* WIN32_FILENAMES */ |
| 428 | 1566 } |
| 1567 | |
| 1568 /* See if any variables are substituted into the string | |
| 1569 and find the total length of their values in `total' */ | |
| 1570 | |
| 1571 for (p = nm; p != endp;) | |
| 1572 if (*p != '$') | |
| 1573 p++; | |
| 1574 else | |
| 1575 { | |
| 1576 p++; | |
| 1577 if (p == endp) | |
|
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1578 { |
|
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1579 /* No substitution, no error. */ |
|
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1580 break; |
|
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|
1581 } |
| 428 | 1582 else if (*p == '$') |
| 1583 { | |
| 1584 /* "$$" means a single "$" */ | |
| 1585 p++; | |
| 1586 total -= 1; | |
| 1587 substituted = 1; | |
| 1588 continue; | |
| 1589 } | |
| 1590 else if (*p == '{') | |
| 1591 { | |
| 1592 o = ++p; | |
| 1593 while (p != endp && *p != '}') p++; | |
|
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1594 if (*p != '}') |
|
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1595 { |
|
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1596 /* No substitution, no error. Keep looking. */ |
|
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1597 p = o; |
|
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1598 continue; |
|
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1599 } |
| 428 | 1600 s = p; |
| 1601 } | |
| 1602 else | |
| 1603 { | |
| 1604 o = p; | |
| 1605 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1606 s = p; | |
| 1607 } | |
| 1608 | |
| 1609 /* Copy out the variable name */ | |
| 2367 | 1610 target = alloca_ibytes (s - o + 1); |
| 771 | 1611 qxestrncpy (target, o, s - o); |
| 428 | 1612 target[s - o] = 0; |
| 442 | 1613 #ifdef WIN32_NATIVE |
| 1204 | 1614 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1615 #endif /* WIN32_NATIVE */ |
| 428 | 1616 |
| 1617 /* Get variable value */ | |
|
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1618 got = egetenv ((CIbyte *) target); |
|
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1619 if (got) |
|
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1620 { |
|
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1621 total += qxestrlen (got); |
|
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1622 substituted = 1; |
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|
1623 } |
| 428 | 1624 } |
| 1625 | |
| 1626 if (!substituted) | |
| 444 | 1627 return filename; |
| 1628 | |
| 1629 /* If substitution required, recopy the filename and do it */ | |
| 428 | 1630 /* Make space in stack frame for the new copy */ |
| 2367 | 1631 xnm = alloca_ibytes (XSTRING_LENGTH (filename) + total + 1); |
| 428 | 1632 x = xnm; |
| 1633 | |
| 1634 /* Copy the rest of the name through, replacing $ constructs with values */ | |
| 1635 for (p = nm; *p;) | |
| 1636 if (*p != '$') | |
| 1637 *x++ = *p++; | |
| 1638 else | |
| 1639 { | |
| 1640 p++; | |
|
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1641 seen_braces = 0; |
| 428 | 1642 if (p == endp) |
|
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1643 { |
|
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1644 *x++ = '$'; |
|
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1645 break; |
|
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1646 } |
| 428 | 1647 else if (*p == '$') |
| 1648 { | |
| 1649 *x++ = *p++; | |
| 1650 continue; | |
| 1651 } | |
| 1652 else if (*p == '{') | |
| 1653 { | |
|
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1654 seen_braces = 1; |
| 428 | 1655 o = ++p; |
| 1656 while (p != endp && *p != '}') p++; | |
|
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1657 if (*p != '}') |
|
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1658 { |
|
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1659 /* Don't syntax error, don't substitute */ |
|
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1660 *x++ = '{'; |
|
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1661 p = o; |
|
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1662 continue; |
|
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1663 } |
| 428 | 1664 s = p++; |
| 1665 } | |
| 1666 else | |
| 1667 { | |
| 1668 o = p; | |
| 1669 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1670 s = p; | |
| 1671 } | |
| 1672 | |
| 1673 /* Copy out the variable name */ | |
| 2367 | 1674 target = alloca_ibytes (s - o + 1); |
| 771 | 1675 qxestrncpy (target, o, s - o); |
| 428 | 1676 target[s - o] = 0; |
| 442 | 1677 #ifdef WIN32_NATIVE |
| 1204 | 1678 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1679 #endif /* WIN32_NATIVE */ |
| 428 | 1680 |
| 1681 /* Get variable value */ | |
|
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1682 got = egetenv ((CIbyte *) target); |
|
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1683 if (got) |
|
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1684 { |
|
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1685 qxestrcpy (x, got); |
|
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1686 x += qxestrlen (got); |
|
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1687 } |
|
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1688 else |
|
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|
1689 { |
|
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1690 *x++ = '$'; |
|
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|
1691 if (seen_braces) |
|
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1692 { |
|
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|
1693 *x++ = '{'; |
|
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|
1694 /* Preserve the original case. */ |
|
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1695 qxestrncpy (x, o, s - o); |
|
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1696 x += s - o; |
|
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1697 *x++ = '}'; |
|
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1698 } |
|
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1699 else |
|
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|
1700 { |
|
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1701 /* Preserve the original case. */ |
|
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1702 qxestrncpy (x, o, s - o); |
|
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|
1703 x += s - o; |
|
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1704 } |
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|
1705 } |
| 428 | 1706 } |
| 1707 | |
| 1708 *x = 0; | |
| 1709 | |
| 1710 /* If /~ or // appears, discard everything through first slash. */ | |
| 1711 | |
| 1712 for (p = xnm; p != x; p++) | |
| 1713 if ((p[0] == '~' | |
| 657 | 1714 #if defined (WIN32_FILENAMES) |
| 428 | 1715 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm) |
| 657 | 1716 #else /* not WIN32_FILENAMES */ |
| 428 | 1717 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1718 #endif /* not WIN32_FILENAMES */ |
| 428 | 1719 ) |
| 1720 /* don't do p[-1] if that would go off the beginning --jwz */ | |
| 1721 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1])) | |
| 1722 xnm = p; | |
| 657 | 1723 #ifdef WIN32_FILENAMES |
| 428 | 1724 else if (IS_DRIVE (p[0]) && p[1] == ':' |
| 1725 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1726 xnm = p; | |
| 1727 #endif | |
| 1728 | |
| 1729 return make_string (xnm, x - xnm); | |
| 1730 } | |
| 1731 | |
| 1732 /* A slightly faster and more convenient way to get | |
| 1733 (directory-file-name (expand-file-name FOO)). */ | |
| 1734 | |
| 1735 Lisp_Object | |
| 1736 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) | |
| 1737 { | |
| 442 | 1738 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1739 Lisp_Object abspath; |
| 1740 struct gcpro gcpro1; | |
| 1741 | |
| 1742 abspath = Fexpand_file_name (filename, defdir); | |
| 1743 GCPRO1 (abspath); | |
| 1744 /* Remove final slash, if any (unless path is root). | |
| 1745 stat behaves differently depending! */ | |
| 1746 if (XSTRING_LENGTH (abspath) > 1 | |
| 826 | 1747 && IS_DIRECTORY_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 1)) |
| 1748 && !IS_DEVICE_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 2))) | |
| 428 | 1749 /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1750 abspath = Fdirectory_file_name (abspath); | |
| 1751 UNGCPRO; | |
| 1752 return abspath; | |
| 1753 } | |
| 1754 | |
| 1755 /* Signal an error if the file ABSNAME already exists. | |
| 1756 If INTERACTIVE is nonzero, ask the user whether to proceed, | |
| 1757 and bypass the error if the user says to go ahead. | |
| 1758 QUERYSTRING is a name for the action that is being considered | |
| 1759 to alter the file. | |
| 1760 *STATPTR is used to store the stat information if the file exists. | |
| 1761 If the file does not exist, STATPTR->st_mode is set to 0. */ | |
| 1762 | |
| 1763 static void | |
| 1333 | 1764 barf_or_query_if_file_exists (Lisp_Object absname, const CIbyte *querystring, |
| 428 | 1765 int interactive, struct stat *statptr) |
| 1766 { | |
| 442 | 1767 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1768 struct stat statbuf; |
| 1769 | |
| 1770 /* stat is a good way to tell whether the file exists, | |
| 1771 regardless of what access permissions it has. */ | |
| 771 | 1772 if (qxe_stat (XSTRING_DATA (absname), &statbuf) >= 0) |
| 428 | 1773 { |
| 1774 Lisp_Object tem; | |
| 1775 | |
| 1776 if (interactive) | |
| 1777 { | |
| 1778 Lisp_Object prompt; | |
| 1779 struct gcpro gcpro1; | |
| 1780 | |
| 771 | 1781 prompt = |
| 1782 emacs_sprintf_string | |
| 1783 (CGETTEXT ("File %s already exists; %s anyway? "), | |
| 1784 XSTRING_DATA (absname), CGETTEXT (querystring)); | |
| 428 | 1785 |
| 1786 GCPRO1 (prompt); | |
| 1787 tem = call1 (Qyes_or_no_p, prompt); | |
| 1788 UNGCPRO; | |
| 1789 } | |
| 1790 else | |
| 1791 tem = Qnil; | |
| 1792 | |
| 1793 if (NILP (tem)) | |
| 1794 Fsignal (Qfile_already_exists, | |
| 771 | 1795 list2 (build_msg_string ("File already exists"), |
| 428 | 1796 absname)); |
| 1797 if (statptr) | |
| 1798 *statptr = statbuf; | |
| 1799 } | |
| 1800 else | |
| 1801 { | |
| 1802 if (statptr) | |
| 1803 statptr->st_mode = 0; | |
| 1804 } | |
| 1805 return; | |
| 1806 } | |
| 1807 | |
| 1808 DEFUN ("copy-file", Fcopy_file, 2, 4, | |
| 1809 "fCopy file: \nFCopy %s to file: \np\nP", /* | |
| 444 | 1810 Copy FILENAME to NEWNAME. Both args must be strings. |
| 428 | 1811 Signals a `file-already-exists' error if file NEWNAME already exists, |
| 1812 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil. | |
| 1813 A number as third arg means request confirmation if NEWNAME already exists. | |
| 1814 This is what happens in interactive use with M-x. | |
| 1815 Fourth arg KEEP-TIME non-nil means give the new file the same | |
| 1816 last-modified time as the old one. (This works on only some systems.) | |
| 1817 A prefix arg makes KEEP-TIME non-nil. | |
| 1818 */ | |
| 1819 (filename, newname, ok_if_already_exists, keep_time)) | |
| 1820 { | |
| 442 | 1821 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1822 int ifd, ofd, n; |
| 1823 char buf[16 * 1024]; | |
| 1824 struct stat st, out_st; | |
| 1825 Lisp_Object handler; | |
| 1826 int speccount = specpdl_depth (); | |
| 1827 struct gcpro gcpro1, gcpro2; | |
| 1828 /* Lisp_Object args[6]; */ | |
| 1829 int input_file_statable_p; | |
| 1830 | |
| 1831 GCPRO2 (filename, newname); | |
| 1832 CHECK_STRING (filename); | |
| 1833 CHECK_STRING (newname); | |
| 1834 filename = Fexpand_file_name (filename, Qnil); | |
| 1835 newname = Fexpand_file_name (newname, Qnil); | |
| 1836 | |
| 1837 /* If the input file name has special constructs in it, | |
| 1838 call the corresponding file handler. */ | |
| 1839 handler = Ffind_file_name_handler (filename, Qcopy_file); | |
| 1840 /* Likewise for output file name. */ | |
| 1841 if (NILP (handler)) | |
| 1842 handler = Ffind_file_name_handler (newname, Qcopy_file); | |
| 1843 if (!NILP (handler)) | |
| 1844 { | |
| 1845 UNGCPRO; | |
| 1846 return call5 (handler, Qcopy_file, filename, newname, | |
| 1847 ok_if_already_exists, keep_time); | |
| 1848 } | |
| 1849 | |
| 1850 /* When second argument is a directory, copy the file into it. | |
| 1851 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo") | |
| 1852 */ | |
| 1853 if (!NILP (Ffile_directory_p (newname))) | |
| 1854 { | |
| 1855 Lisp_Object args[3]; | |
| 1856 struct gcpro ngcpro1; | |
| 1857 int i = 1; | |
| 1858 | |
| 1859 args[0] = newname; | |
| 1860 args[1] = Qnil; args[2] = Qnil; | |
| 1861 NGCPRO1 (*args); | |
| 1862 ngcpro1.nvars = 3; | |
| 826 | 1863 if (!IS_DIRECTORY_SEP (string_byte (newname, |
| 442 | 1864 XSTRING_LENGTH (newname) - 1))) |
| 1865 | |
| 1866 args[i++] = Fchar_to_string (Vdirectory_sep_char); | |
| 428 | 1867 args[i++] = Ffile_name_nondirectory (filename); |
| 1868 newname = Fconcat (i, args); | |
| 1869 NUNGCPRO; | |
| 1870 } | |
| 1871 | |
| 1872 if (NILP (ok_if_already_exists) | |
| 1873 || INTP (ok_if_already_exists)) | |
| 1874 barf_or_query_if_file_exists (newname, "copy to it", | |
| 1875 INTP (ok_if_already_exists), &out_st); | |
| 771 | 1876 else if (qxe_stat (XSTRING_DATA (newname), &out_st) < 0) |
| 428 | 1877 out_st.st_mode = 0; |
| 1878 | |
| 771 | 1879 ifd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 1880 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 1881 if (ifd < 0) |
| 563 | 1882 report_file_error ("Opening input file", filename); |
| 428 | 1883 |
| 1884 record_unwind_protect (close_file_unwind, make_int (ifd)); | |
| 1885 | |
| 1886 /* We can only copy regular files and symbolic links. Other files are not | |
| 1887 copyable by us. */ | |
| 771 | 1888 input_file_statable_p = (qxe_fstat (ifd, &st) >= 0); |
| 428 | 1889 |
| 442 | 1890 #ifndef WIN32_NATIVE |
| 428 | 1891 if (out_st.st_mode != 0 |
| 1892 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
| 1893 { | |
| 1894 errno = 0; | |
| 1895 report_file_error ("Input and output files are the same", | |
| 563 | 1896 list3 (Qunbound, filename, newname)); |
| 428 | 1897 } |
| 1898 #endif | |
| 1899 | |
| 1900 #if defined (S_ISREG) && defined (S_ISLNK) | |
| 1901 if (input_file_statable_p) | |
| 1902 { | |
| 1903 if (!(S_ISREG (st.st_mode)) | |
| 1904 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */ | |
| 1905 #ifdef S_ISCHR | |
| 1906 && !(S_ISCHR (st.st_mode)) | |
| 1907 #endif | |
| 1908 && !(S_ISLNK (st.st_mode))) | |
| 1909 { | |
| 1910 #if defined (EISDIR) | |
| 1911 /* Get a better looking error message. */ | |
| 1912 errno = EISDIR; | |
| 1913 #endif /* EISDIR */ | |
| 563 | 1914 report_file_error ("Non-regular file", filename); |
| 428 | 1915 } |
| 1916 } | |
| 1917 #endif /* S_ISREG && S_ISLNK */ | |
| 1918 | |
| 771 | 1919 ofd = qxe_open (XSTRING_DATA (newname), |
| 1920 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE); | |
| 428 | 1921 if (ofd < 0) |
| 563 | 1922 report_file_error ("Opening output file", newname); |
| 428 | 1923 |
| 1924 { | |
| 1925 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil); | |
| 1926 | |
| 1927 record_unwind_protect (close_file_unwind, ofd_locative); | |
| 1928 | |
| 1929 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0) | |
| 1930 { | |
| 1931 if (write_allowing_quit (ofd, buf, n) != n) | |
| 563 | 1932 report_file_error ("I/O error", newname); |
| 428 | 1933 } |
| 1934 | |
| 1935 /* Closing the output clobbers the file times on some systems. */ | |
| 771 | 1936 if (retry_close (ofd) < 0) |
| 563 | 1937 report_file_error ("I/O error", newname); |
| 428 | 1938 |
| 1939 if (input_file_statable_p) | |
| 1940 { | |
| 442 | 1941 if (!NILP (keep_time)) |
| 1942 { | |
| 1943 EMACS_TIME atime, mtime; | |
| 1944 EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
| 1945 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
| 592 | 1946 if (set_file_times (newname, atime, mtime)) |
| 1947 report_file_error ("I/O error", list1 (newname)); | |
| 442 | 1948 } |
| 771 | 1949 qxe_chmod (XSTRING_DATA (newname), st.st_mode & 07777); |
| 428 | 1950 } |
| 1951 | |
| 1952 /* We'll close it by hand */ | |
| 1953 XCAR (ofd_locative) = Qnil; | |
| 1954 | |
| 1955 /* Close ifd */ | |
| 771 | 1956 unbind_to (speccount); |
| 428 | 1957 } |
| 1958 | |
| 1959 UNGCPRO; | |
| 1960 return Qnil; | |
| 1961 } | |
| 1962 | |
| 1963 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /* | |
| 1964 Create a directory. One argument, a file name string. | |
| 1965 */ | |
| 1966 (dirname_)) | |
| 1967 { | |
| 1968 /* This function can GC. GC checked 1997.04.06. */ | |
| 1969 Lisp_Object handler; | |
| 1970 struct gcpro gcpro1; | |
| 771 | 1971 DECLARE_EISTRING (dir); |
| 428 | 1972 |
| 1973 CHECK_STRING (dirname_); | |
| 1974 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1975 | |
| 1976 GCPRO1 (dirname_); | |
| 1977 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal); | |
| 1978 UNGCPRO; | |
| 1979 if (!NILP (handler)) | |
| 1980 return (call2 (handler, Qmake_directory_internal, dirname_)); | |
| 1981 | |
| 771 | 1982 eicpy_lstr (dir, dirname_); |
| 1983 if (eigetch_char (dir, eicharlen (dir) - 1) == '/') | |
| 1984 eidel (dir, eilen (dir) - 1, -1, 1, -1); | |
| 1985 | |
| 1986 if (qxe_mkdir (eidata (dir), 0777) != 0) | |
| 563 | 1987 report_file_error ("Creating directory", dirname_); |
| 428 | 1988 |
| 1989 return Qnil; | |
| 1990 } | |
| 1991 | |
| 1992 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /* | |
| 1993 Delete a directory. One argument, a file name or directory name string. | |
| 1994 */ | |
| 1995 (dirname_)) | |
| 1996 { | |
| 1997 /* This function can GC. GC checked 1997.04.06. */ | |
| 1998 Lisp_Object handler; | |
| 1999 struct gcpro gcpro1; | |
| 2000 | |
| 2001 CHECK_STRING (dirname_); | |
| 2002 | |
| 2003 GCPRO1 (dirname_); | |
| 2004 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 2005 dirname_ = Fdirectory_file_name (dirname_); | |
| 2006 | |
| 2007 handler = Ffind_file_name_handler (dirname_, Qdelete_directory); | |
| 2008 UNGCPRO; | |
| 2009 if (!NILP (handler)) | |
| 2010 return (call2 (handler, Qdelete_directory, dirname_)); | |
| 2011 | |
| 771 | 2012 if (qxe_rmdir (XSTRING_DATA (dirname_)) != 0) |
| 563 | 2013 report_file_error ("Removing directory", dirname_); |
| 428 | 2014 |
| 2015 return Qnil; | |
| 2016 } | |
| 2017 | |
| 2018 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /* | |
| 442 | 2019 Delete the file named FILENAME (a string). |
| 2020 If FILENAME has multiple names, it continues to exist with the other names. | |
| 428 | 2021 */ |
| 2022 (filename)) | |
| 2023 { | |
| 2024 /* This function can GC. GC checked 1997.04.06. */ | |
| 2025 Lisp_Object handler; | |
| 2026 struct gcpro gcpro1; | |
| 2027 | |
| 2028 CHECK_STRING (filename); | |
| 2029 filename = Fexpand_file_name (filename, Qnil); | |
| 2030 | |
| 2031 GCPRO1 (filename); | |
| 2032 handler = Ffind_file_name_handler (filename, Qdelete_file); | |
| 2033 UNGCPRO; | |
| 2034 if (!NILP (handler)) | |
| 2035 return call2 (handler, Qdelete_file, filename); | |
| 2036 | |
| 771 | 2037 if (0 > qxe_unlink (XSTRING_DATA (filename))) |
| 563 | 2038 report_file_error ("Removing old name", filename); |
| 428 | 2039 return Qnil; |
| 2040 } | |
| 2041 | |
| 2042 static Lisp_Object | |
| 2286 | 2043 internal_delete_file_1 (Lisp_Object UNUSED (ignore), |
| 2044 Lisp_Object UNUSED (ignore2)) | |
| 428 | 2045 { |
| 2046 return Qt; | |
| 2047 } | |
| 2048 | |
| 2049 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
| 2050 | |
| 2051 int | |
| 2052 internal_delete_file (Lisp_Object filename) | |
| 2053 { | |
| 2054 /* This function can GC. GC checked 1997.04.06. */ | |
| 2055 return NILP (condition_case_1 (Qt, Fdelete_file, filename, | |
| 2056 internal_delete_file_1, Qnil)); | |
| 2057 } | |
| 2058 | |
| 2059 DEFUN ("rename-file", Frename_file, 2, 3, | |
| 2060 "fRename file: \nFRename %s to file: \np", /* | |
| 444 | 2061 Rename FILENAME as NEWNAME. Both args must be strings. |
| 2062 If file has names other than FILENAME, it continues to have those names. | |
| 428 | 2063 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2064 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2065 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2066 This is what happens in interactive use with M-x. | |
| 2067 */ | |
| 2068 (filename, newname, ok_if_already_exists)) | |
| 2069 { | |
| 2070 /* This function can GC. GC checked 1997.04.06. */ | |
| 2071 Lisp_Object handler; | |
| 2072 struct gcpro gcpro1, gcpro2; | |
| 2073 | |
| 2074 GCPRO2 (filename, newname); | |
| 2075 CHECK_STRING (filename); | |
| 2076 CHECK_STRING (newname); | |
| 2077 filename = Fexpand_file_name (filename, Qnil); | |
| 2078 newname = Fexpand_file_name (newname, Qnil); | |
| 2079 | |
| 2080 /* If the file name has special constructs in it, | |
| 2081 call the corresponding file handler. */ | |
| 2082 handler = Ffind_file_name_handler (filename, Qrename_file); | |
| 2083 if (NILP (handler)) | |
| 2084 handler = Ffind_file_name_handler (newname, Qrename_file); | |
| 2085 if (!NILP (handler)) | |
| 2086 { | |
| 2087 UNGCPRO; | |
| 2088 return call4 (handler, Qrename_file, | |
| 2089 filename, newname, ok_if_already_exists); | |
| 2090 } | |
| 2091 | |
| 2092 /* When second argument is a directory, rename the file into it. | |
| 2093 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo") | |
| 2094 */ | |
| 2095 if (!NILP (Ffile_directory_p (newname))) | |
| 2096 { | |
| 2097 Lisp_Object args[3]; | |
| 2098 struct gcpro ngcpro1; | |
| 2099 int i = 1; | |
| 2100 | |
| 2101 args[0] = newname; | |
| 2102 args[1] = Qnil; args[2] = Qnil; | |
| 2103 NGCPRO1 (*args); | |
| 2104 ngcpro1.nvars = 3; | |
| 826 | 2105 if (string_byte (newname, XSTRING_LENGTH (newname) - 1) != '/') |
| 428 | 2106 args[i++] = build_string ("/"); |
| 2107 args[i++] = Ffile_name_nondirectory (filename); | |
| 2108 newname = Fconcat (i, args); | |
| 2109 NUNGCPRO; | |
| 2110 } | |
| 2111 | |
| 2112 if (NILP (ok_if_already_exists) | |
| 2113 || INTP (ok_if_already_exists)) | |
| 2114 barf_or_query_if_file_exists (newname, "rename to it", | |
| 2115 INTP (ok_if_already_exists), 0); | |
| 2116 | |
| 442 | 2117 /* We have configure check for rename() and emulate using |
| 2118 link()/unlink() if necessary. */ | |
| 771 | 2119 if (0 > qxe_rename (XSTRING_DATA (filename), XSTRING_DATA (newname))) |
| 428 | 2120 { |
| 2121 if (errno == EXDEV) | |
| 2122 { | |
| 2123 Fcopy_file (filename, newname, | |
| 2124 /* We have already prompted if it was an integer, | |
| 2125 so don't have copy-file prompt again. */ | |
| 2126 (NILP (ok_if_already_exists) ? Qnil : Qt), | |
| 2127 Qt); | |
| 2128 Fdelete_file (filename); | |
| 2129 } | |
| 2130 else | |
| 2131 { | |
| 563 | 2132 report_file_error ("Renaming", list3 (Qunbound, filename, newname)); |
| 428 | 2133 } |
| 2134 } | |
| 2135 UNGCPRO; | |
| 2136 return Qnil; | |
| 2137 } | |
| 2138 | |
| 2139 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3, | |
| 2140 "fAdd name to file: \nFName to add to %s: \np", /* | |
| 444 | 2141 Give FILENAME additional name NEWNAME. Both args must be strings. |
| 428 | 2142 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2143 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2144 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2145 This is what happens in interactive use with M-x. | |
| 2146 */ | |
| 2147 (filename, newname, ok_if_already_exists)) | |
| 2148 { | |
| 2149 /* This function can GC. GC checked 1997.04.06. */ | |
| 2150 Lisp_Object handler; | |
| 2151 struct gcpro gcpro1, gcpro2; | |
| 2152 | |
| 2153 GCPRO2 (filename, newname); | |
| 2154 CHECK_STRING (filename); | |
| 2155 CHECK_STRING (newname); | |
| 2156 filename = Fexpand_file_name (filename, Qnil); | |
| 2157 newname = Fexpand_file_name (newname, Qnil); | |
| 2158 | |
| 2159 /* If the file name has special constructs in it, | |
| 2160 call the corresponding file handler. */ | |
| 2161 handler = Ffind_file_name_handler (filename, Qadd_name_to_file); | |
| 2162 if (!NILP (handler)) | |
| 2163 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2164 newname, ok_if_already_exists)); | |
| 2165 | |
| 2166 /* If the new name has special constructs in it, | |
| 2167 call the corresponding file handler. */ | |
| 2168 handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
| 2169 if (!NILP (handler)) | |
| 2170 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2171 newname, ok_if_already_exists)); | |
| 2172 | |
| 2173 if (NILP (ok_if_already_exists) | |
| 2174 || INTP (ok_if_already_exists)) | |
| 2175 barf_or_query_if_file_exists (newname, "make it a new name", | |
| 2176 INTP (ok_if_already_exists), 0); | |
| 771 | 2177 /* #### Emacs 20.6 contains an implementation of link() in w32.c. |
| 2178 Need to port. */ | |
| 2179 #ifndef HAVE_LINK | |
| 563 | 2180 signal_error_2 (Qunimplemented, "Adding new name", filename, newname); |
| 771 | 2181 #else /* HAVE_LINK */ |
| 2182 qxe_unlink (XSTRING_DATA (newname)); | |
| 2183 if (0 > qxe_link (XSTRING_DATA (filename), XSTRING_DATA (newname))) | |
| 428 | 2184 { |
| 2185 report_file_error ("Adding new name", | |
| 563 | 2186 list3 (Qunbound, filename, newname)); |
| 428 | 2187 } |
| 771 | 2188 #endif /* HAVE_LINK */ |
| 428 | 2189 |
| 2190 UNGCPRO; | |
| 2191 return Qnil; | |
| 2192 } | |
| 2193 | |
| 2194 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3, | |
| 2195 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /* | |
| 2196 Make a symbolic link to FILENAME, named LINKNAME. Both args strings. | |
| 2197 Signals a `file-already-exists' error if a file LINKNAME already exists | |
| 2198 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2199 A number as third arg means request confirmation if LINKNAME already exists. | |
| 2200 This happens for interactive use with M-x. | |
|
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2201 |
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2202 On platforms where symbolic links are not available, any file handlers will |
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2203 be run, but the check for the existence of LINKNAME will not be done, and |
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2204 the symbolic link will not be created. |
| 428 | 2205 */ |
| 2206 (filename, linkname, ok_if_already_exists)) | |
| 2207 { | |
| 2208 /* This function can GC. GC checked 1997.06.04. */ | |
| 442 | 2209 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 428 | 2210 Lisp_Object handler; |
| 2211 struct gcpro gcpro1, gcpro2; | |
| 2212 | |
| 2213 GCPRO2 (filename, linkname); | |
| 2214 CHECK_STRING (filename); | |
| 2215 CHECK_STRING (linkname); | |
| 2216 /* If the link target has a ~, we must expand it to get | |
| 2217 a truly valid file name. Otherwise, do not expand; | |
| 2218 we want to permit links to relative file names. */ | |
| 826 | 2219 if (string_byte (filename, 0) == '~') |
| 428 | 2220 filename = Fexpand_file_name (filename, Qnil); |
| 2221 linkname = Fexpand_file_name (linkname, Qnil); | |
| 2222 | |
| 2223 /* If the file name has special constructs in it, | |
| 2224 call the corresponding file handler. */ | |
| 2225 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); | |
| 2226 if (!NILP (handler)) | |
| 2227 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, | |
| 2228 ok_if_already_exists)); | |
| 2229 | |
| 2230 /* If the new link name has special constructs in it, | |
| 2231 call the corresponding file handler. */ | |
| 2232 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
| 2233 if (!NILP (handler)) | |
| 2234 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
| 2235 linkname, ok_if_already_exists)); | |
| 2236 | |
| 771 | 2237 #ifdef HAVE_SYMLINK |
| 428 | 2238 if (NILP (ok_if_already_exists) |
| 2239 || INTP (ok_if_already_exists)) | |
| 2240 barf_or_query_if_file_exists (linkname, "make it a link", | |
| 2241 INTP (ok_if_already_exists), 0); | |
| 2242 | |
| 771 | 2243 qxe_unlink (XSTRING_DATA (linkname)); |
| 2244 if (0 > qxe_symlink (XSTRING_DATA (filename), | |
| 2245 XSTRING_DATA (linkname))) | |
| 428 | 2246 { |
| 2247 report_file_error ("Making symbolic link", | |
| 563 | 2248 list3 (Qunbound, filename, linkname)); |
| 428 | 2249 } |
| 771 | 2250 #endif |
| 442 | 2251 |
| 428 | 2252 UNGCPRO; |
| 2253 return Qnil; | |
| 2254 } | |
| 2255 | |
| 2256 #ifdef HPUX_NET | |
| 2257 | |
| 2258 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /* | |
| 2259 Open a network connection to PATH using LOGIN as the login string. | |
| 2260 */ | |
| 2261 (path, login)) | |
| 2262 { | |
| 2263 int netresult; | |
| 1333 | 2264 const Extbyte *path_ext; |
| 2265 const Extbyte *login_ext; | |
| 428 | 2266 |
| 2267 CHECK_STRING (path); | |
| 2268 CHECK_STRING (login); | |
| 2269 | |
| 2270 /* netunam, being a strange-o system call only used once, is not | |
| 2271 encapsulated. */ | |
| 440 | 2272 |
| 442 | 2273 LISP_STRING_TO_EXTERNAL (path, path_ext, Qfile_name); |
| 2274 LISP_STRING_TO_EXTERNAL (login, login_ext, Qnative); | |
| 440 | 2275 |
| 2276 netresult = netunam (path_ext, login_ext); | |
| 2277 | |
| 2278 return netresult == -1 ? Qnil : Qt; | |
| 428 | 2279 } |
| 2280 #endif /* HPUX_NET */ | |
| 2281 | |
| 2282 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /* | |
| 2283 Return t if file FILENAME specifies an absolute path name. | |
| 2284 On Unix, this is a name starting with a `/' or a `~'. | |
| 2285 */ | |
| 2286 (filename)) | |
| 2287 { | |
| 2288 /* This function does not GC */ | |
| 867 | 2289 Ibyte *ptr; |
| 428 | 2290 |
| 2291 CHECK_STRING (filename); | |
| 2292 ptr = XSTRING_DATA (filename); | |
| 2293 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~' | |
| 657 | 2294 #ifdef WIN32_FILENAMES |
| 428 | 2295 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2])) |
| 2296 #endif | |
| 2297 ) ? Qt : Qnil; | |
| 2298 } | |
| 2299 | |
| 2300 /* Return nonzero if file FILENAME exists and can be executed. */ | |
| 2301 | |
| 2302 static int | |
| 771 | 2303 check_executable (Lisp_Object filename) |
| 428 | 2304 { |
| 442 | 2305 #ifdef WIN32_NATIVE |
| 428 | 2306 struct stat st; |
| 771 | 2307 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2308 return 0; |
| 2309 return ((st.st_mode & S_IEXEC) != 0); | |
| 442 | 2310 #else /* not WIN32_NATIVE */ |
| 428 | 2311 #ifdef HAVE_EACCESS |
| 771 | 2312 return qxe_eaccess (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2313 #else |
| 2314 /* Access isn't quite right because it uses the real uid | |
| 2315 and we really want to test with the effective uid. | |
| 2316 But Unix doesn't give us a right way to do it. */ | |
| 771 | 2317 return qxe_access (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2318 #endif /* HAVE_EACCESS */ |
| 442 | 2319 #endif /* not WIN32_NATIVE */ |
| 428 | 2320 } |
| 2321 | |
| 2322 /* Return nonzero if file FILENAME exists and can be written. */ | |
| 2323 | |
| 2324 static int | |
| 867 | 2325 check_writable (const Ibyte *filename) |
| 428 | 2326 { |
| 3728 | 2327 #if defined(WIN32_NATIVE) || defined(CYGWIN) |
| 2328 #ifdef CYGWIN | |
|
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2329 Extbyte filename_buffer[PATH_MAX]; |
| 3728 | 2330 #endif |
| 2331 // Since this has to work for a directory, we can't just call 'CreateFile' | |
| 2332 PSECURITY_DESCRIPTOR pDesc; /* Must be freed with LocalFree */ | |
| 2333 /* these need not be freed, they point into pDesc */ | |
| 2334 PSID psidOwner; | |
| 2335 PSID psidGroup; | |
| 2336 PACL pDacl; | |
| 2337 PACL pSacl; | |
| 2338 /* end of insides of descriptor */ | |
| 2339 DWORD error; | |
| 2340 DWORD attributes; | |
| 2341 HANDLE tokenHandle; | |
| 2342 GENERIC_MAPPING genericMapping; | |
| 2343 DWORD accessMask; | |
| 2344 PRIVILEGE_SET PrivilegeSet; | |
| 2345 DWORD dwPrivSetSize = sizeof( PRIVILEGE_SET ); | |
| 2346 BOOL fAccessGranted = FALSE; | |
| 3781 | 2347 DWORD dwAccessAllowed; |
| 2348 Extbyte *fnameext; | |
| 3728 | 2349 |
|
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changeset
|
2350 C_STRING_TO_TSTR(filename, fnameext); |
|
c12b646d84ee
changes to get things to compile under latest cygwin
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
2351 |
| 3728 | 2352 #ifdef CYGWIN |
|
4824
c12b646d84ee
changes to get things to compile under latest cygwin
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
2353 cygwin_conv_to_full_win32_path(fnameext, filename_buffer); |
|
c12b646d84ee
changes to get things to compile under latest cygwin
Ben Wing <ben@xemacs.org>
parents:
4759
diff
changeset
|
2354 fnameext = filename_buffer; |
| 3728 | 2355 #endif |
| 2356 | |
| 3781 | 2357 // First check for a normal file with the old-style readonly bit |
| 2358 attributes = qxeGetFileAttributes(fnameext); | |
| 2359 if (FILE_ATTRIBUTE_READONLY == (attributes & (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_READONLY))) | |
| 2360 return 0; | |
| 2361 | |
| 3728 | 2362 /* Win32 prototype lacks const. */ |
| 2363 error = qxeGetNamedSecurityInfo(fnameext, SE_FILE_OBJECT, | |
| 3781 | 2364 DACL_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|OWNER_SECURITY_INFORMATION, |
| 2365 &psidOwner, &psidGroup, &pDacl, &pSacl, &pDesc); | |
| 3728 | 2366 if(error != ERROR_SUCCESS) { // FAT? |
| 3781 | 2367 attributes = qxeGetFileAttributes(fnameext); |
| 3728 | 2368 return (attributes & FILE_ATTRIBUTE_DIRECTORY) || (0 == (attributes & FILE_ATTRIBUTE_READONLY)); |
| 2369 } | |
| 2370 | |
| 2371 genericMapping.GenericRead = FILE_GENERIC_READ; | |
| 2372 genericMapping.GenericWrite = FILE_GENERIC_WRITE; | |
| 2373 genericMapping.GenericExecute = FILE_GENERIC_EXECUTE; | |
| 2374 genericMapping.GenericAll = FILE_ALL_ACCESS; | |
| 2375 | |
| 2376 if(!ImpersonateSelf(SecurityDelegation)) { | |
| 2377 return 0; | |
| 2378 } | |
| 2379 if(!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, &tokenHandle)) { | |
| 2380 return 0; | |
| 2381 } | |
| 2382 | |
| 2383 accessMask = GENERIC_WRITE; | |
| 2384 MapGenericMask(&accessMask, &genericMapping); | |
| 2385 | |
| 2386 if(!AccessCheck(pDesc, tokenHandle, accessMask, &genericMapping, | |
| 2387 &PrivilegeSet, // receives privileges used in check | |
| 2388 &dwPrivSetSize, // size of PrivilegeSet buffer | |
| 2389 &dwAccessAllowed, // receives mask of allowed access rights | |
| 2390 &fAccessGranted)) | |
| 2391 { | |
| 2392 CloseHandle(tokenHandle); | |
| 2393 RevertToSelf(); | |
| 2394 LocalFree(pDesc); | |
| 2395 return 0; | |
| 2396 } | |
| 2397 CloseHandle(tokenHandle); | |
| 2398 RevertToSelf(); | |
| 2399 LocalFree(pDesc); | |
| 2400 return fAccessGranted == TRUE; | |
| 2401 #else | |
| 428 | 2402 #ifdef HAVE_EACCESS |
| 771 | 2403 return (qxe_eaccess (filename, W_OK) >= 0); |
| 428 | 2404 #else |
| 2405 /* Access isn't quite right because it uses the real uid | |
| 2406 and we really want to test with the effective uid. | |
| 2407 But Unix doesn't give us a right way to do it. | |
| 2408 Opening with O_WRONLY could work for an ordinary file, | |
| 2409 but would lose for directories. */ | |
| 771 | 2410 return (qxe_access (filename, W_OK) >= 0); |
| 428 | 2411 #endif |
| 3728 | 2412 #endif |
| 428 | 2413 } |
| 2414 | |
| 2415 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /* | |
| 2416 Return t if file FILENAME exists. (This does not mean you can read it.) | |
| 2417 See also `file-readable-p' and `file-attributes'. | |
| 2418 */ | |
| 2419 (filename)) | |
| 2420 { | |
| 442 | 2421 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 2422 Lisp_Object abspath; |
| 2423 Lisp_Object handler; | |
| 2424 struct stat statbuf; | |
| 2425 struct gcpro gcpro1; | |
| 2426 | |
| 2427 CHECK_STRING (filename); | |
| 2428 abspath = Fexpand_file_name (filename, Qnil); | |
| 2429 | |
| 2430 /* If the file name has special constructs in it, | |
| 2431 call the corresponding file handler. */ | |
| 2432 GCPRO1 (abspath); | |
| 2433 handler = Ffind_file_name_handler (abspath, Qfile_exists_p); | |
| 2434 UNGCPRO; | |
| 2435 if (!NILP (handler)) | |
| 2436 return call2 (handler, Qfile_exists_p, abspath); | |
| 2437 | |
| 771 | 2438 return qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil; |
| 428 | 2439 } |
| 2440 | |
| 2441 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /* | |
| 2442 Return t if FILENAME can be executed by you. | |
| 2443 For a directory, this means you can access files in that directory. | |
| 2444 */ | |
| 2445 (filename)) | |
| 2446 | |
| 2447 { | |
| 442 | 2448 /* This function can GC. GC checked 07-11-2000 ben. */ |
| 428 | 2449 Lisp_Object abspath; |
| 2450 Lisp_Object handler; | |
| 2451 struct gcpro gcpro1; | |
| 2452 | |
| 2453 CHECK_STRING (filename); | |
| 2454 abspath = Fexpand_file_name (filename, Qnil); | |
| 2455 | |
| 2456 /* If the file name has special constructs in it, | |
| 2457 call the corresponding file handler. */ | |
| 2458 GCPRO1 (abspath); | |
| 2459 handler = Ffind_file_name_handler (abspath, Qfile_executable_p); | |
| 2460 UNGCPRO; | |
| 2461 if (!NILP (handler)) | |
| 2462 return call2 (handler, Qfile_executable_p, abspath); | |
| 2463 | |
| 771 | 2464 return check_executable (abspath) ? Qt : Qnil; |
| 428 | 2465 } |
| 2466 | |
| 2467 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /* | |
| 2468 Return t if file FILENAME exists and you can read it. | |
| 2469 See also `file-exists-p' and `file-attributes'. | |
| 2470 */ | |
| 2471 (filename)) | |
| 2472 { | |
| 2473 /* This function can GC */ | |
| 2474 Lisp_Object abspath = Qnil; | |
| 2475 Lisp_Object handler; | |
| 2476 struct gcpro gcpro1; | |
| 2477 GCPRO1 (abspath); | |
| 2478 | |
| 2479 CHECK_STRING (filename); | |
| 2480 abspath = Fexpand_file_name (filename, Qnil); | |
| 2481 | |
| 2482 /* If the file name has special constructs in it, | |
| 2483 call the corresponding file handler. */ | |
| 2484 handler = Ffind_file_name_handler (abspath, Qfile_readable_p); | |
| 2485 if (!NILP (handler)) | |
| 2486 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath)); | |
| 2487 | |
| 2526 | 2488 #if defined (WIN32_FILENAMES) |
| 428 | 2489 /* Under MS-DOS and Windows, open does not work for directories. */ |
| 2490 UNGCPRO; | |
| 771 | 2491 if (qxe_access (XSTRING_DATA (abspath), 0) == 0) |
| 428 | 2492 return Qt; |
| 2493 else | |
| 2494 return Qnil; | |
| 657 | 2495 #else /* not WIN32_FILENAMES */ |
| 428 | 2496 { |
| 771 | 2497 int desc = qxe_interruptible_open (XSTRING_DATA (abspath), |
| 2498 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 2499 UNGCPRO; |
| 2500 if (desc < 0) | |
| 2501 return Qnil; | |
| 771 | 2502 retry_close (desc); |
| 428 | 2503 return Qt; |
| 2504 } | |
| 657 | 2505 #endif /* not WIN32_FILENAMES */ |
| 428 | 2506 } |
| 2507 | |
| 2508 /* Having this before file-symlink-p mysteriously caused it to be forgotten | |
| 2509 on the RT/PC. */ | |
| 2510 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /* | |
| 2511 Return t if file FILENAME can be written or created by you. | |
| 2512 */ | |
| 2513 (filename)) | |
| 2514 { | |
| 2515 /* This function can GC. GC checked 1997.04.10. */ | |
| 2516 Lisp_Object abspath, dir; | |
| 2517 Lisp_Object handler; | |
| 2518 struct stat statbuf; | |
| 2519 struct gcpro gcpro1; | |
| 2520 | |
| 2521 CHECK_STRING (filename); | |
| 2522 abspath = Fexpand_file_name (filename, Qnil); | |
| 2523 | |
| 2524 /* If the file name has special constructs in it, | |
| 2525 call the corresponding file handler. */ | |
| 2526 GCPRO1 (abspath); | |
| 2527 handler = Ffind_file_name_handler (abspath, Qfile_writable_p); | |
| 2528 UNGCPRO; | |
| 2529 if (!NILP (handler)) | |
| 2530 return call2 (handler, Qfile_writable_p, abspath); | |
| 2531 | |
| 771 | 2532 if (qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0) |
| 2533 return (check_writable (XSTRING_DATA (abspath)) | |
| 428 | 2534 ? Qt : Qnil); |
| 2535 | |
| 2536 | |
| 2537 GCPRO1 (abspath); | |
| 2538 dir = Ffile_name_directory (abspath); | |
| 2539 UNGCPRO; | |
| 867 | 2540 return (check_writable (!NILP (dir) ? XSTRING_DATA (dir) : (Ibyte *) "") |
| 428 | 2541 ? Qt : Qnil); |
| 2542 } | |
| 2543 | |
| 2544 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /* | |
| 2545 Return non-nil if file FILENAME is the name of a symbolic link. | |
| 2546 The value is the name of the file to which it is linked. | |
| 2547 Otherwise returns nil. | |
| 2548 */ | |
| 2549 (filename)) | |
| 2550 { | |
| 2551 /* This function can GC. GC checked 1997.04.10. */ | |
| 442 | 2552 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 771 | 2553 #ifdef HAVE_READLINK |
| 867 | 2554 Ibyte *buf; |
| 428 | 2555 int bufsize; |
| 2556 int valsize; | |
| 2557 Lisp_Object val; | |
| 442 | 2558 #endif |
| 428 | 2559 Lisp_Object handler; |
| 2560 struct gcpro gcpro1; | |
| 2561 | |
| 2562 CHECK_STRING (filename); | |
| 2563 filename = Fexpand_file_name (filename, Qnil); | |
| 2564 | |
| 2565 /* If the file name has special constructs in it, | |
| 2566 call the corresponding file handler. */ | |
| 2567 GCPRO1 (filename); | |
| 2568 handler = Ffind_file_name_handler (filename, Qfile_symlink_p); | |
| 2569 UNGCPRO; | |
| 2570 if (!NILP (handler)) | |
| 2571 return call2 (handler, Qfile_symlink_p, filename); | |
| 2572 | |
| 771 | 2573 #ifdef HAVE_READLINK |
| 428 | 2574 bufsize = 100; |
| 2575 while (1) | |
| 2576 { | |
| 867 | 2577 buf = xnew_array_and_zero (Ibyte, bufsize); |
| 771 | 2578 valsize = qxe_readlink (XSTRING_DATA (filename), |
| 2579 buf, bufsize); | |
| 428 | 2580 if (valsize < bufsize) break; |
| 2581 /* Buffer was not long enough */ | |
| 1726 | 2582 xfree (buf, Ibyte *); |
| 428 | 2583 bufsize *= 2; |
| 2584 } | |
| 2585 if (valsize == -1) | |
| 2586 { | |
| 1726 | 2587 xfree (buf, Ibyte *); |
| 428 | 2588 return Qnil; |
| 2589 } | |
| 771 | 2590 val = make_string (buf, valsize); |
| 1726 | 2591 xfree (buf, Ibyte *); |
| 428 | 2592 return val; |
| 2526 | 2593 #elif defined (WIN32_NATIVE) |
| 2594 if (mswindows_shortcuts_are_symlinks) | |
| 2595 { | |
| 2596 /* We want to resolve the directory component and leave the rest | |
| 2597 alone. */ | |
| 2598 Ibyte *path = XSTRING_DATA (filename); | |
| 2599 Ibyte *dirend = | |
| 2600 find_end_of_directory_component (path, XSTRING_LENGTH (filename)); | |
| 2601 Ibyte *fname; | |
| 2602 DECLARE_EISTRING (dir); | |
| 2603 | |
| 2604 if (dirend != path) | |
| 2605 { | |
| 2606 Ibyte *resdir; | |
| 2607 DECLARE_EISTRING (resname); | |
| 2608 | |
| 2609 eicpy_raw (dir, path, dirend - path); | |
| 2610 PATHNAME_RESOLVE_LINKS (eidata (dir), resdir); | |
| 2611 eicpy_rawz (resname, resdir); | |
| 2612 eicat_rawz (resname, dirend); | |
| 2613 path = eidata (resname); | |
| 2614 } | |
| 2615 | |
| 2616 fname = mswindows_read_link (path); | |
| 2617 if (!fname) | |
| 2618 return Qnil; | |
| 2619 { | |
| 2620 Lisp_Object val = build_intstring (fname); | |
| 2621 xfree (fname, Ibyte *); | |
| 2622 return val; | |
| 2623 } | |
| 2624 } | |
| 428 | 2625 return Qnil; |
| 2526 | 2626 #else |
| 2627 return Qnil; | |
| 2628 #endif | |
| 428 | 2629 } |
| 2630 | |
| 2631 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /* | |
| 2632 Return t if file FILENAME is the name of a directory as a file. | |
| 2633 A directory name spec may be given instead; then the value is t | |
| 2634 if the directory so specified exists and really is a directory. | |
| 2635 */ | |
| 2636 (filename)) | |
| 2637 { | |
| 2638 /* This function can GC. GC checked 1997.04.10. */ | |
| 2639 Lisp_Object abspath; | |
| 2640 struct stat st; | |
| 2641 Lisp_Object handler; | |
| 2642 struct gcpro gcpro1; | |
| 2643 | |
| 2644 GCPRO1 (current_buffer->directory); | |
| 2645 abspath = expand_and_dir_to_file (filename, | |
| 2646 current_buffer->directory); | |
| 2647 UNGCPRO; | |
| 2648 | |
| 2649 /* If the file name has special constructs in it, | |
| 2650 call the corresponding file handler. */ | |
| 2651 GCPRO1 (abspath); | |
| 2652 handler = Ffind_file_name_handler (abspath, Qfile_directory_p); | |
| 2653 UNGCPRO; | |
| 2654 if (!NILP (handler)) | |
| 2655 return call2 (handler, Qfile_directory_p, abspath); | |
| 2656 | |
| 771 | 2657 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2658 return Qnil; |
| 2659 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
| 2660 } | |
| 2661 | |
| 2662 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /* | |
| 2663 Return t if file FILENAME is the name of a directory as a file, | |
| 2664 and files in that directory can be opened by you. In order to use a | |
| 2665 directory as a buffer's current directory, this predicate must return true. | |
| 2666 A directory name spec may be given instead; then the value is t | |
| 2667 if the directory so specified exists and really is a readable and | |
| 2668 searchable directory. | |
| 2669 */ | |
| 2670 (filename)) | |
| 2671 { | |
| 2672 /* This function can GC. GC checked 1997.04.10. */ | |
| 2673 Lisp_Object handler; | |
| 2674 | |
| 2675 /* If the file name has special constructs in it, | |
| 2676 call the corresponding file handler. */ | |
| 2677 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); | |
| 2678 if (!NILP (handler)) | |
| 2679 return call2 (handler, Qfile_accessible_directory_p, | |
| 2680 filename); | |
| 2681 | |
| 2526 | 2682 #if !defined (WIN32_NATIVE) |
| 428 | 2683 if (NILP (Ffile_directory_p (filename))) |
| 2684 return (Qnil); | |
| 2685 else | |
| 2686 return Ffile_executable_p (filename); | |
| 2687 #else | |
| 2688 { | |
| 2689 int tem; | |
| 2690 struct gcpro gcpro1; | |
| 2691 /* It's an unlikely combination, but yes we really do need to gcpro: | |
| 2692 Suppose that file-accessible-directory-p has no handler, but | |
| 2693 file-directory-p does have a handler; this handler causes a GC which | |
| 2694 relocates the string in `filename'; and finally file-directory-p | |
| 2695 returns non-nil. Then we would end up passing a garbaged string | |
| 2696 to file-executable-p. */ | |
| 2697 GCPRO1 (filename); | |
| 2698 tem = (NILP (Ffile_directory_p (filename)) | |
| 2699 || NILP (Ffile_executable_p (filename))); | |
| 2700 UNGCPRO; | |
| 2701 return tem ? Qnil : Qt; | |
| 2702 } | |
| 442 | 2703 #endif /* !defined(WIN32_NATIVE) */ |
| 428 | 2704 } |
| 2705 | |
| 2706 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /* | |
| 2707 Return t if file FILENAME is the name of a regular file. | |
| 2708 This is the sort of file that holds an ordinary stream of data bytes. | |
| 2709 */ | |
| 2710 (filename)) | |
| 2711 { | |
| 2712 /* This function can GC. GC checked 1997.04.10. */ | |
| 2713 Lisp_Object abspath; | |
| 2714 struct stat st; | |
| 2715 Lisp_Object handler; | |
| 2716 struct gcpro gcpro1; | |
| 2717 | |
| 2718 GCPRO1 (current_buffer->directory); | |
| 2719 abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
| 2720 UNGCPRO; | |
| 2721 | |
| 2722 /* If the file name has special constructs in it, | |
| 2723 call the corresponding file handler. */ | |
| 2724 GCPRO1 (abspath); | |
| 2725 handler = Ffind_file_name_handler (abspath, Qfile_regular_p); | |
| 2726 UNGCPRO; | |
| 2727 if (!NILP (handler)) | |
| 2728 return call2 (handler, Qfile_regular_p, abspath); | |
| 2729 | |
| 771 | 2730 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2731 return Qnil; |
| 2732 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
| 2733 } | |
| 2734 | |
| 2735 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /* | |
| 444 | 2736 Return mode bits of file named FILENAME, as an integer. |
| 428 | 2737 */ |
| 2738 (filename)) | |
| 2739 { | |
| 2740 /* This function can GC. GC checked 1997.04.10. */ | |
| 2741 Lisp_Object abspath; | |
| 2742 struct stat st; | |
| 2743 Lisp_Object handler; | |
| 2744 struct gcpro gcpro1; | |
| 2745 | |
| 2746 GCPRO1 (current_buffer->directory); | |
| 2747 abspath = expand_and_dir_to_file (filename, | |
| 2748 current_buffer->directory); | |
| 2749 UNGCPRO; | |
| 2750 | |
| 2751 /* If the file name has special constructs in it, | |
| 2752 call the corresponding file handler. */ | |
| 2753 GCPRO1 (abspath); | |
| 2754 handler = Ffind_file_name_handler (abspath, Qfile_modes); | |
| 2755 UNGCPRO; | |
| 2756 if (!NILP (handler)) | |
| 2757 return call2 (handler, Qfile_modes, abspath); | |
| 2758 | |
| 771 | 2759 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2760 return Qnil; |
| 2761 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */ | |
| 2762 #if 0 | |
| 442 | 2763 #ifdef WIN32_NATIVE |
| 771 | 2764 if (check_executable (abspath)) |
| 428 | 2765 st.st_mode |= S_IEXEC; |
| 442 | 2766 #endif /* WIN32_NATIVE */ |
| 428 | 2767 #endif /* 0 */ |
| 2768 | |
| 2769 return make_int (st.st_mode & 07777); | |
| 2770 } | |
| 2771 | |
| 2772 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /* | |
| 444 | 2773 Set mode bits of file named FILENAME to MODE (an integer). |
| 428 | 2774 Only the 12 low bits of MODE are used. |
| 2775 */ | |
| 2776 (filename, mode)) | |
| 2777 { | |
| 2778 /* This function can GC. GC checked 1997.04.10. */ | |
| 2779 Lisp_Object abspath; | |
| 2780 Lisp_Object handler; | |
| 2781 struct gcpro gcpro1; | |
| 2782 | |
| 2783 GCPRO1 (current_buffer->directory); | |
| 2784 abspath = Fexpand_file_name (filename, current_buffer->directory); | |
| 2785 UNGCPRO; | |
| 2786 | |
| 2787 CHECK_INT (mode); | |
| 2788 | |
| 2789 /* If the file name has special constructs in it, | |
| 2790 call the corresponding file handler. */ | |
| 2791 GCPRO1 (abspath); | |
| 2792 handler = Ffind_file_name_handler (abspath, Qset_file_modes); | |
| 2793 UNGCPRO; | |
| 2794 if (!NILP (handler)) | |
| 2795 return call3 (handler, Qset_file_modes, abspath, mode); | |
| 2796 | |
| 771 | 2797 if (qxe_chmod (XSTRING_DATA (abspath), XINT (mode)) < 0) |
| 563 | 2798 report_file_error ("Doing chmod", abspath); |
| 428 | 2799 |
| 2800 return Qnil; | |
| 2801 } | |
| 2802 | |
| 2803 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /* | |
| 2804 Set the file permission bits for newly created files. | |
| 444 | 2805 The argument MODE should be an integer; if a bit in MODE is 1, |
| 2806 subsequently created files will not have the permission corresponding | |
| 2807 to that bit enabled. Only the low 9 bits are used. | |
| 428 | 2808 This setting is inherited by subprocesses. |
| 2809 */ | |
| 2810 (mode)) | |
| 2811 { | |
| 2812 CHECK_INT (mode); | |
| 2813 | |
| 2814 umask ((~ XINT (mode)) & 0777); | |
| 2815 | |
| 2816 return Qnil; | |
| 2817 } | |
| 2818 | |
| 2819 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /* | |
| 2820 Return the default file protection for created files. | |
| 2821 The umask value determines which permissions are enabled in newly | |
| 2822 created files. If a permission's bit in the umask is 1, subsequently | |
| 2823 created files will not have that permission enabled. | |
| 2824 */ | |
| 2825 ()) | |
| 2826 { | |
| 2827 int mode; | |
| 2828 | |
| 2829 mode = umask (0); | |
| 2830 umask (mode); | |
| 2831 | |
| 2832 return make_int ((~ mode) & 0777); | |
| 2833 } | |
| 2834 | |
| 2835 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /* | |
| 2836 Tell Unix to finish all pending disk updates. | |
| 2837 */ | |
| 2838 ()) | |
| 2839 { | |
| 442 | 2840 #ifndef WIN32_NATIVE |
| 428 | 2841 sync (); |
| 2842 #endif | |
| 2843 return Qnil; | |
| 2844 } | |
| 2845 | |
| 2846 | |
| 2847 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /* | |
| 2848 Return t if file FILE1 is newer than file FILE2. | |
| 2849 If FILE1 does not exist, the answer is nil; | |
| 2850 otherwise, if FILE2 does not exist, the answer is t. | |
| 2851 */ | |
| 2852 (file1, file2)) | |
| 2853 { | |
| 2854 /* This function can GC. GC checked 1997.04.10. */ | |
| 2855 Lisp_Object abspath1, abspath2; | |
| 2856 struct stat st; | |
| 2857 int mtime1; | |
| 2858 Lisp_Object handler; | |
| 2859 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2860 | |
| 2861 CHECK_STRING (file1); | |
| 2862 CHECK_STRING (file2); | |
| 2863 | |
| 2864 abspath1 = Qnil; | |
| 2865 abspath2 = Qnil; | |
| 2866 | |
| 2867 GCPRO3 (abspath1, abspath2, current_buffer->directory); | |
| 2868 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
| 2869 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
| 2870 | |
| 2871 /* If the file name has special constructs in it, | |
| 2872 call the corresponding file handler. */ | |
| 2873 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p); | |
| 2874 if (NILP (handler)) | |
| 2875 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p); | |
| 2876 UNGCPRO; | |
| 2877 if (!NILP (handler)) | |
| 2878 return call3 (handler, Qfile_newer_than_file_p, abspath1, | |
| 2879 abspath2); | |
| 2880 | |
| 771 | 2881 if (qxe_stat (XSTRING_DATA (abspath1), &st) < 0) |
| 428 | 2882 return Qnil; |
| 2883 | |
| 2884 mtime1 = st.st_mtime; | |
| 2885 | |
| 771 | 2886 if (qxe_stat (XSTRING_DATA (abspath2), &st) < 0) |
| 428 | 2887 return Qt; |
| 2888 | |
| 2889 return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
| 2890 } | |
| 2891 | |
| 2892 | |
| 2893 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */ | |
| 2894 /* #define READ_BUF_SIZE (2 << 16) */ | |
| 2895 #define READ_BUF_SIZE (1 << 15) | |
| 2896 | |
| 2897 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal, | |
| 2898 1, 7, 0, /* | |
| 2899 Insert contents of file FILENAME after point; no coding-system frobbing. | |
| 2900 This function is identical to `insert-file-contents' except for the | |
| 771 | 2901 handling of the CODESYS and USED-CODESYS arguments. |
| 2902 | |
| 2903 The file is decoded according to CODESYS; if omitted, no conversion | |
| 2904 happens. If USED-CODESYS is non-nil, it should be a symbol, and the actual | |
| 2905 coding system that was used for the decoding is stored into it. It will in | |
| 2906 general be different from CODESYS if CODESYS specifies automatic encoding | |
| 2907 detection or end-of-line detection. | |
| 428 | 2908 |
| 444 | 2909 Currently START and END refer to byte positions (as opposed to character |
| 771 | 2910 positions), even in Mule and under MS Windows. (Fixing this, particularly |
| 2911 under Mule, is very difficult.) | |
| 428 | 2912 */ |
| 444 | 2913 (filename, visit, start, end, replace, codesys, used_codesys)) |
| 428 | 2914 { |
| 2915 /* This function can call lisp */ | |
| 2916 struct stat st; | |
| 2917 int fd; | |
| 2918 int saverrno = 0; | |
| 2919 Charcount inserted = 0; | |
| 2920 int speccount; | |
| 3841 | 2921 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3814 | 2922 Lisp_Object val; |
| 428 | 2923 int total; |
| 867 | 2924 Ibyte read_buf[READ_BUF_SIZE]; |
| 428 | 2925 int mc_count; |
| 2926 struct buffer *buf = current_buffer; | |
| 2927 Lisp_Object curbuf; | |
| 2928 int not_regular = 0; | |
| 771 | 2929 int do_speedy_insert = |
| 2930 coding_system_is_binary (Fget_coding_system (codesys)); | |
| 428 | 2931 |
| 2932 if (buf->base_buffer && ! NILP (visit)) | |
| 563 | 2933 invalid_operation ("Cannot do file visiting in an indirect buffer", Qunbound); |
| 428 | 2934 |
| 2935 /* No need to call Fbarf_if_buffer_read_only() here. | |
| 2936 That's called in begin_multiple_change() or wherever. */ | |
| 2937 | |
| 2938 val = Qnil; | |
| 2939 | |
| 2940 /* #### dmoore - should probably check in various places to see if | |
| 2941 curbuf was killed and if so signal an error? */ | |
| 2942 | |
| 793 | 2943 curbuf = wrap_buffer (buf); |
| 428 | 2944 |
| 3814 | 2945 GCPRO4 (filename, val, visit, curbuf); |
| 428 | 2946 |
| 2947 mc_count = (NILP (replace)) ? | |
| 2948 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) : | |
| 2949 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf)); | |
| 2950 | |
| 2951 speccount = specpdl_depth (); /* begin_multiple_change also adds | |
| 2952 an unwind_protect */ | |
| 2953 | |
| 2954 filename = Fexpand_file_name (filename, Qnil); | |
| 2955 | |
| 2956 if (!NILP (used_codesys)) | |
| 2957 CHECK_SYMBOL (used_codesys); | |
| 2958 | |
| 444 | 2959 if ( (!NILP (start) || !NILP (end)) && !NILP (visit) ) |
| 563 | 2960 invalid_operation ("Attempt to visit less than an entire file", Qunbound); |
| 428 | 2961 |
| 2962 fd = -1; | |
| 2963 | |
| 771 | 2964 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2965 { |
| 2966 badopen: | |
| 2967 if (NILP (visit)) | |
| 563 | 2968 report_file_error ("Opening input file", filename); |
| 428 | 2969 st.st_mtime = -1; |
| 2970 goto notfound; | |
| 2971 } | |
| 2972 | |
| 2973 #ifdef S_IFREG | |
| 2974 /* Signal an error if we are accessing a non-regular file, with | |
| 444 | 2975 REPLACE, START or END being non-nil. */ |
| 428 | 2976 if (!S_ISREG (st.st_mode)) |
| 2977 { | |
| 2978 not_regular = 1; | |
| 2979 | |
| 2980 if (!NILP (visit)) | |
| 2981 goto notfound; | |
| 2982 | |
| 444 | 2983 if (!NILP (replace) || !NILP (start) || !NILP (end)) |
| 428 | 2984 { |
| 2985 end_multiple_change (buf, mc_count); | |
| 2986 | |
| 444 | 2987 RETURN_UNGCPRO |
| 2988 (Fsignal (Qfile_error, | |
| 771 | 2989 list2 (build_msg_string("not a regular file"), |
| 444 | 2990 filename))); |
| 428 | 2991 } |
| 2992 } | |
| 2993 #endif /* S_IFREG */ | |
| 2994 | |
| 444 | 2995 if (!NILP (start)) |
| 2996 CHECK_INT (start); | |
| 428 | 2997 else |
| 444 | 2998 start = Qzero; |
| 428 | 2999 |
| 3000 if (!NILP (end)) | |
| 3001 CHECK_INT (end); | |
| 3002 | |
| 3003 if (fd < 0) | |
| 3004 { | |
| 771 | 3005 if ((fd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 3006 O_RDONLY | OPEN_BINARY, 0)) < 0) | |
| 428 | 3007 goto badopen; |
| 3008 } | |
| 3009 | |
| 3010 /* Replacement should preserve point as it preserves markers. */ | |
| 3011 if (!NILP (replace)) | |
| 3012 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil)); | |
| 3013 | |
| 3014 record_unwind_protect (close_file_unwind, make_int (fd)); | |
| 3015 | |
| 3016 /* Supposedly happens on VMS. */ | |
| 3017 if (st.st_size < 0) | |
| 563 | 3018 signal_error (Qfile_error, "File size is negative", Qunbound); |
| 428 | 3019 |
| 3020 if (NILP (end)) | |
| 3021 { | |
| 3022 if (!not_regular) | |
| 3023 { | |
| 3024 end = make_int (st.st_size); | |
| 3025 if (XINT (end) != st.st_size) | |
| 563 | 3026 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3027 } |
| 3028 } | |
| 3029 | |
| 3030 /* If requested, replace the accessible part of the buffer | |
| 3031 with the file contents. Avoid replacing text at the | |
| 3032 beginning or end of the buffer that matches the file contents; | |
| 771 | 3033 that preserves markers pointing to the unchanged parts. */ |
| 3034 /* The replace-mode code is currently implemented by comparing the | |
| 3035 file on disk with the contents in the buffer, character by character. | |
| 3036 That works only if the characters on disk are exactly what will go into | |
| 3037 the buffer -- i.e. `binary' conversion. | |
| 3038 | |
| 3039 FSF tries to implement this in all situations, even the non-binary | |
| 3040 conversion, by (in that case) loading the whole converted file into a | |
| 3041 separate memory area, then doing the comparison. I really don't see | |
| 3042 the point of this, and it will fail spectacularly if the file is many | |
| 3043 megabytes in size. To try to get around this, we could certainly read | |
| 3044 from the beginning and decode as necessary before comparing, but doing | |
| 3045 the same at the end gets very difficult because of the possibility of | |
| 3046 modal coding systems -- trying to decode data from any point forward | |
| 3047 without decoding previous data might always give you different results | |
| 3048 from starting at the beginning. We could try further tricks like | |
| 3049 keeping track of which coding systems are non-modal and providing some | |
| 3050 extra method for such coding systems to be given a chunk of data that | |
| 3051 came from a specified location in a specified file and ask the coding | |
| 3052 systems to return a "sync point" from which the data can be read | |
| 3053 forward and have results guaranteed to be the same as reading from the | |
| 3054 beginning to that point, but I really don't think it's worth it. If | |
| 3055 we implemented the FSF "brute-force" method, we would have to put a | |
| 3056 reasonable maximum file size on the files. Is any of this worth it? | |
| 3057 --ben | |
| 3058 | |
| 3638 | 3059 |
| 3060 It's probably not worth it, and despite what you might take from the | |
| 3061 above, we don't do it currently; that is, for non-"binary" coding | |
| 3062 systems, we don't try to implement replace-mode at all. See the | |
| 3063 do_speedy_insert variable above. The upside of this is that our API | |
| 3064 is consistent and not buggy. -- Aidan Kehoe, Fri Oct 27 21:02:30 CEST | |
| 3065 2006 | |
| 771 | 3066 */ |
| 3067 | |
| 428 | 3068 if (!NILP (replace)) |
| 3069 { | |
| 771 | 3070 if (!do_speedy_insert) |
| 3071 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf), | |
| 3072 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3073 else | |
| 428 | 3074 { |
| 771 | 3075 char buffer[1 << 14]; |
| 3076 Charbpos same_at_start = BUF_BEGV (buf); | |
| 3077 Charbpos same_at_end = BUF_ZV (buf); | |
| 3078 int overlap; | |
| 3079 | |
| 3080 /* Count how many chars at the start of the file | |
| 3081 match the text at the beginning of the buffer. */ | |
| 3082 while (1) | |
| 3083 { | |
| 3084 int nread; | |
| 3085 Charbpos charbpos; | |
| 3086 nread = read_allowing_quit (fd, buffer, sizeof (buffer)); | |
| 3087 if (nread < 0) | |
| 3088 report_file_error ("Reading", filename); | |
| 3089 else if (nread == 0) | |
| 3090 break; | |
| 3091 charbpos = 0; | |
| 3092 while (charbpos < nread && same_at_start < BUF_ZV (buf) | |
| 814 | 3093 && BUF_FETCH_CHAR (buf, same_at_start) == |
| 3094 buffer[charbpos]) | |
| 771 | 3095 same_at_start++, charbpos++; |
| 3096 /* If we found a discrepancy, stop the scan. | |
| 3097 Otherwise loop around and scan the next bufferful. */ | |
| 3098 if (charbpos != nread) | |
| 3099 break; | |
| 3100 } | |
| 3101 /* If the file matches the buffer completely, | |
| 3102 there's no need to replace anything. */ | |
| 3103 if (same_at_start - BUF_BEGV (buf) == st.st_size) | |
| 3104 { | |
| 3105 retry_close (fd); | |
| 3106 unbind_to (speccount); | |
| 3107 /* Truncate the buffer to the size of the file. */ | |
| 3108 buffer_delete_range (buf, same_at_start, same_at_end, | |
| 3109 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3110 goto handled; | |
| 3111 } | |
| 3112 /* Count how many chars at the end of the file | |
| 3113 match the text at the end of the buffer. */ | |
| 3114 while (1) | |
| 3115 { | |
| 3116 int total_read, nread; | |
| 814 | 3117 Charcount charbpos, curpos, trial; |
| 771 | 3118 |
| 3119 /* At what file position are we now scanning? */ | |
| 3120 curpos = st.st_size - (BUF_ZV (buf) - same_at_end); | |
| 3121 /* If the entire file matches the buffer tail, stop the scan. */ | |
| 3122 if (curpos == 0) | |
| 3123 break; | |
| 3124 /* How much can we scan in the next step? */ | |
| 3125 trial = min (curpos, (Charbpos) sizeof (buffer)); | |
| 3126 if (lseek (fd, curpos - trial, 0) < 0) | |
| 3127 report_file_error ("Setting file position", filename); | |
| 3128 | |
| 3129 total_read = 0; | |
| 3130 while (total_read < trial) | |
| 3131 { | |
| 3132 nread = read_allowing_quit (fd, buffer + total_read, | |
| 3133 trial - total_read); | |
| 3134 if (nread <= 0) | |
| 3135 report_file_error ("IO error reading file", filename); | |
| 3136 total_read += nread; | |
| 3137 } | |
| 3138 /* Scan this bufferful from the end, comparing with | |
| 3139 the Emacs buffer. */ | |
| 3140 charbpos = total_read; | |
| 3141 /* Compare with same_at_start to avoid counting some buffer text | |
| 3142 as matching both at the file's beginning and at the end. */ | |
| 3143 while (charbpos > 0 && same_at_end > same_at_start | |
| 3144 && BUF_FETCH_CHAR (buf, same_at_end - 1) == | |
| 3145 buffer[charbpos - 1]) | |
| 3146 same_at_end--, charbpos--; | |
| 3147 /* If we found a discrepancy, stop the scan. | |
| 3148 Otherwise loop around and scan the preceding bufferful. */ | |
| 3149 if (charbpos != 0) | |
| 3150 break; | |
| 3151 /* If display current starts at beginning of line, | |
| 3152 keep it that way. */ | |
| 3153 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf) | |
| 3154 XWINDOW (Fselected_window (Qnil))->start_at_line_beg = | |
| 3155 !NILP (Fbolp (wrap_buffer (buf))); | |
| 3156 } | |
| 3157 | |
| 3158 /* Don't try to reuse the same piece of text twice. */ | |
| 3159 overlap = same_at_start - BUF_BEGV (buf) - | |
| 3160 (same_at_end + st.st_size - BUF_ZV (buf)); | |
| 3161 if (overlap > 0) | |
| 3162 same_at_end += overlap; | |
| 3163 | |
| 3164 /* Arrange to read only the nonmatching middle part of the file. */ | |
| 3165 start = make_int (same_at_start - BUF_BEGV (buf)); | |
| 3166 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end)); | |
| 3167 | |
| 428 | 3168 buffer_delete_range (buf, same_at_start, same_at_end, |
| 3169 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 771 | 3170 /* Insert from the file at the proper position. */ |
| 3171 BUF_SET_PT (buf, same_at_start); | |
| 428 | 3172 } |
| 3173 } | |
| 3174 | |
| 3175 if (!not_regular) | |
| 3176 { | |
| 444 | 3177 total = XINT (end) - XINT (start); |
| 428 | 3178 |
| 3179 /* Make sure point-max won't overflow after this insertion. */ | |
| 3180 if (total != XINT (make_int (total))) | |
| 563 | 3181 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3182 } |
| 3183 else | |
| 3184 /* For a special file, all we can do is guess. The value of -1 | |
| 3185 will make the stream functions read as much as possible. */ | |
| 3186 total = -1; | |
| 3187 | |
| 444 | 3188 if (XINT (start) != 0 |
| 428 | 3189 /* why was this here? asked jwz. The reason is that the replace-mode |
| 3190 connivings above will normally put the file pointer other than | |
| 3191 where it should be. */ | |
| 771 | 3192 || (!NILP (replace) && do_speedy_insert)) |
| 428 | 3193 { |
| 444 | 3194 if (lseek (fd, XINT (start), 0) < 0) |
| 563 | 3195 report_file_error ("Setting file position", filename); |
| 428 | 3196 } |
| 3197 | |
| 3198 { | |
| 665 | 3199 Charbpos cur_point = BUF_PT (buf); |
| 428 | 3200 struct gcpro ngcpro1; |
| 3201 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total, | |
| 3202 LSTR_ALLOW_QUIT); | |
| 3203 | |
| 3204 NGCPRO1 (stream); | |
| 3205 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 771 | 3206 stream = make_coding_input_stream |
| 3207 (XLSTREAM (stream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 3208 CODING_DECODE, 0); |
| 428 | 3209 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); |
| 3210 | |
| 3211 record_unwind_protect (delete_stream_unwind, stream); | |
| 3212 | |
| 3213 /* No need to limit the amount of stuff we attempt to read. (It would | |
| 3214 be incorrect, anyway, when Mule is enabled.) Instead, the limiting | |
| 3215 occurs inside of the filedesc stream. */ | |
| 3216 while (1) | |
| 3217 { | |
| 665 | 3218 Bytecount this_len; |
| 428 | 3219 Charcount cc_inserted; |
| 3220 | |
| 3221 QUIT; | |
| 3222 this_len = Lstream_read (XLSTREAM (stream), read_buf, | |
| 3223 sizeof (read_buf)); | |
| 3224 | |
| 3225 if (this_len <= 0) | |
| 3226 { | |
| 3227 if (this_len < 0) | |
| 3228 saverrno = errno; | |
| 3229 break; | |
| 3230 } | |
| 3231 | |
| 3232 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf, | |
| 3233 this_len, | |
| 3234 !NILP (visit) | |
| 3235 ? INSDEL_NO_LOCKING : 0); | |
| 3236 inserted += cc_inserted; | |
| 3237 cur_point += cc_inserted; | |
| 3238 } | |
| 3239 if (!NILP (used_codesys)) | |
| 3240 { | |
| 3241 Fset (used_codesys, | |
| 771 | 3242 XCODING_SYSTEM_NAME |
| 3243 (coding_stream_detected_coding_system (XLSTREAM (stream)))); | |
| 428 | 3244 } |
| 3245 NUNGCPRO; | |
| 3246 } | |
| 3247 | |
| 3248 /* Close the file/stream */ | |
| 771 | 3249 unbind_to (speccount); |
| 428 | 3250 |
| 3251 if (saverrno != 0) | |
| 3252 { | |
| 563 | 3253 errno = saverrno; |
| 3254 report_file_error ("Reading", filename); | |
| 428 | 3255 } |
| 3256 | |
| 3257 notfound: | |
| 3258 handled: | |
| 3259 | |
| 3260 end_multiple_change (buf, mc_count); | |
| 3261 | |
| 3262 if (!NILP (visit)) | |
| 3263 { | |
| 3264 if (!EQ (buf->undo_list, Qt)) | |
| 3265 buf->undo_list = Qnil; | |
| 3814 | 3266 buf->modtime = st.st_mtime; |
| 3267 buf->filename = filename; | |
| 3268 /* XEmacs addition: */ | |
| 3269 /* This function used to be in C, ostensibly so that | |
| 3270 it could be called here. But that's just silly. | |
| 3271 There's no reason C code can't call out to Lisp | |
| 3272 code, and it's a lot cleaner this way. */ | |
| 3273 /* Note: compute-buffer-file-truename is called for | |
| 3274 side-effect! Its return value is intentionally | |
| 3275 ignored. */ | |
| 3276 if (!NILP (Ffboundp (Qcompute_buffer_file_truename))) | |
| 3277 call1 (Qcompute_buffer_file_truename, wrap_buffer (buf)); | |
| 428 | 3278 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf); |
| 3279 buf->auto_save_modified = BUF_MODIFF (buf); | |
| 3280 buf->saved_size = make_int (BUF_SIZE (buf)); | |
| 3281 #ifdef CLASH_DETECTION | |
| 3814 | 3282 if (!NILP (buf->file_truename)) |
| 3283 unlock_file (buf->file_truename); | |
| 3284 unlock_file (filename); | |
| 428 | 3285 #endif /* CLASH_DETECTION */ |
| 3286 if (not_regular) | |
| 3287 RETURN_UNGCPRO (Fsignal (Qfile_error, | |
| 771 | 3288 list2 (build_msg_string ("not a regular file"), |
| 428 | 3289 filename))); |
| 3290 | |
| 3291 /* If visiting nonexistent file, return nil. */ | |
| 3292 if (buf->modtime == -1) | |
| 3293 report_file_error ("Opening input file", | |
| 563 | 3294 filename); |
| 428 | 3295 } |
| 3296 | |
| 3297 /* Decode file format */ | |
| 3298 if (inserted > 0) | |
| 3299 { | |
| 3300 Lisp_Object insval = call3 (Qformat_decode, | |
| 3301 Qnil, make_int (inserted), visit); | |
| 3302 CHECK_INT (insval); | |
| 3303 inserted = XINT (insval); | |
| 3304 } | |
| 3305 | |
| 3306 if (inserted > 0) | |
| 3307 { | |
| 2367 | 3308 GC_EXTERNAL_LIST_LOOP_2 (p, Vafter_insert_file_functions) |
| 428 | 3309 { |
| 2367 | 3310 Lisp_Object insval = call1 (p, make_int (inserted)); |
| 428 | 3311 if (!NILP (insval)) |
| 3312 { | |
| 3313 CHECK_NATNUM (insval); | |
| 3314 inserted = XINT (insval); | |
| 3315 } | |
| 3316 } | |
| 2367 | 3317 END_GC_EXTERNAL_LIST_LOOP (p); |
| 428 | 3318 } |
| 3319 | |
| 3320 UNGCPRO; | |
| 3321 | |
| 3322 if (!NILP (val)) | |
| 3323 return (val); | |
| 3324 else | |
| 3325 return (list2 (filename, make_int (inserted))); | |
| 3326 } | |
| 3327 | |
| 3328 | |
| 3329 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3330 Lisp_Object *annot); | |
| 3331 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end); | |
| 3332 | |
| 3333 /* If build_annotations switched buffers, switch back to BUF. | |
| 3334 Kill the temporary buffer that was selected in the meantime. */ | |
| 3335 | |
| 3336 static Lisp_Object | |
| 3337 build_annotations_unwind (Lisp_Object buf) | |
| 3338 { | |
| 3339 Lisp_Object tembuf; | |
| 3340 | |
| 3341 if (XBUFFER (buf) == current_buffer) | |
| 3342 return Qnil; | |
| 3343 tembuf = Fcurrent_buffer (); | |
| 3344 Fset_buffer (buf); | |
| 3345 Fkill_buffer (tembuf); | |
| 3346 return Qnil; | |
| 3347 } | |
| 3348 | |
| 4266 | 3349 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 8, |
| 428 | 3350 "r\nFWrite region to file: ", /* |
| 3351 Write current region into specified file; no coding-system frobbing. | |
| 4266 | 3352 |
| 3353 This function is almost identical to `write-region'; see that function for | |
| 3354 documentation of the START, END, FILENAME, APPEND, VISIT, and LOCKNAME | |
| 3355 arguments. CODESYS specifies the encoding to be used for the file; if it is | |
| 3356 nil, no code conversion occurs. (With `write-region' the coding system is | |
| 3357 determined automatically if not specified.) | |
| 3358 | |
| 3359 MUSTBENEW specifies that a check for an existing file of the same name | |
| 3360 should be made. If it is 'excl, XEmacs will error on detecting such a file | |
| 3361 and never write it. If it is some other non-nil value, the user will be | |
| 3362 prompted to confirm the overwriting of an existing file. If it is nil, | |
| 3363 existing files are silently overwritten when file system permissions allow | |
| 3364 this. | |
| 764 | 3365 |
| 3366 As a special kludge to support auto-saving, when START is nil START and | |
| 3367 END are set to the beginning and end, respectively, of the buffer, | |
| 3368 regardless of any restrictions. Don't use this feature. It is documented | |
| 3369 here because write-region handler writers need to be aware of it. | |
| 4266 | 3370 |
| 428 | 3371 */ |
| 4266 | 3372 (start, end, filename, append, visit, lockname, codesys, |
| 3373 mustbenew)) | |
| 428 | 3374 { |
| 442 | 3375 /* This function can call lisp. GC checked 2000-07-28 ben */ |
| 428 | 3376 int desc; |
| 3377 int failure; | |
| 3378 int save_errno = 0; | |
| 3379 struct stat st; | |
| 442 | 3380 Lisp_Object fn = Qnil; |
| 428 | 3381 int speccount = specpdl_depth (); |
| 3382 int visiting_other = STRINGP (visit); | |
| 3383 int visiting = (EQ (visit, Qt) || visiting_other); | |
| 3384 int quietly = (!visiting && !NILP (visit)); | |
| 3385 Lisp_Object visit_file = Qnil; | |
| 3386 Lisp_Object annotations = Qnil; | |
| 3387 struct buffer *given_buffer; | |
| 665 | 3388 Charbpos start1, end1; |
| 442 | 3389 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3390 struct gcpro ngcpro1, ngcpro2; | |
| 793 | 3391 Lisp_Object curbuf = wrap_buffer (current_buffer); |
| 3392 | |
| 442 | 3393 |
| 3394 /* start, end, visit, and append are never modified in this fun | |
| 3395 so we don't protect them. */ | |
| 3396 GCPRO5 (visit_file, filename, codesys, lockname, annotations); | |
| 3397 NGCPRO2 (curbuf, fn); | |
| 3398 | |
| 3399 /* [[ dmoore - if Fexpand_file_name or handlers kill the buffer, | |
| 428 | 3400 we should signal an error rather than blissfully continuing |
| 3401 along. ARGH, this function is going to lose lose lose. We need | |
| 3402 to protect the current_buffer from being destroyed, but the | |
| 442 | 3403 multiple return points make this a pain in the butt. ]] we do |
| 3404 protect curbuf now. --ben */ | |
| 428 | 3405 |
| 771 | 3406 codesys = get_coding_system_for_text_file (codesys, 0); |
| 428 | 3407 |
| 3408 if (current_buffer->base_buffer && ! NILP (visit)) | |
| 442 | 3409 invalid_operation ("Cannot do file visiting in an indirect buffer", |
| 3410 curbuf); | |
| 428 | 3411 |
| 3412 if (!NILP (start) && !STRINGP (start)) | |
| 3413 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0); | |
| 3414 | |
| 3415 { | |
| 3416 Lisp_Object handler; | |
| 3417 | |
| 4266 | 3418 if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
| 3419 barf_or_query_if_file_exists (filename, "overwrite", 1, NULL); | |
| 3420 | |
| 428 | 3421 if (visiting_other) |
| 3422 visit_file = Fexpand_file_name (visit, Qnil); | |
| 3423 else | |
| 3424 visit_file = filename; | |
| 3425 filename = Fexpand_file_name (filename, Qnil); | |
| 3426 | |
| 3427 if (NILP (lockname)) | |
| 3428 lockname = visit_file; | |
| 3429 | |
| 442 | 3430 /* We used to UNGCPRO here. BAD! visit_file is used below after |
| 3431 more Lisp calling. */ | |
| 428 | 3432 /* If the file name has special constructs in it, |
| 3433 call the corresponding file handler. */ | |
| 3434 handler = Ffind_file_name_handler (filename, Qwrite_region); | |
| 3435 /* If FILENAME has no handler, see if VISIT has one. */ | |
| 3436 if (NILP (handler) && STRINGP (visit)) | |
| 3437 handler = Ffind_file_name_handler (visit, Qwrite_region); | |
| 3438 | |
| 3439 if (!NILP (handler)) | |
| 3440 { | |
| 3441 Lisp_Object val = call8 (handler, Qwrite_region, start, end, | |
| 3442 filename, append, visit, lockname, codesys); | |
| 3443 if (visiting) | |
| 3444 { | |
| 3445 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3446 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3447 current_buffer->filename = visit_file; | |
| 3448 MARK_MODELINE_CHANGED; | |
| 3449 } | |
| 442 | 3450 NUNGCPRO; |
| 3451 UNGCPRO; | |
| 428 | 3452 return val; |
| 3453 } | |
| 3454 } | |
| 3455 | |
| 3456 #ifdef CLASH_DETECTION | |
| 3457 if (!auto_saving) | |
| 442 | 3458 lock_file (lockname); |
| 428 | 3459 #endif /* CLASH_DETECTION */ |
| 3460 | |
| 3461 /* Special kludge to simplify auto-saving. */ | |
| 3462 if (NILP (start)) | |
| 3463 { | |
| 3464 start1 = BUF_BEG (current_buffer); | |
| 3465 end1 = BUF_Z (current_buffer); | |
| 3466 } | |
| 3467 | |
| 3468 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); | |
| 3469 | |
| 3470 given_buffer = current_buffer; | |
| 3471 annotations = build_annotations (start, end); | |
| 3472 if (current_buffer != given_buffer) | |
| 3473 { | |
| 3474 start1 = BUF_BEGV (current_buffer); | |
| 3475 end1 = BUF_ZV (current_buffer); | |
| 3476 } | |
| 3477 | |
| 3478 fn = filename; | |
| 3479 desc = -1; | |
| 3480 if (!NILP (append)) | |
| 3481 { | |
| 4266 | 3482 desc = qxe_open (XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY |
| 3483 | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), 0); | |
| 428 | 3484 } |
| 3485 if (desc < 0) | |
| 3486 { | |
| 771 | 3487 desc = qxe_open (XSTRING_DATA (fn), |
| 4266 | 3488 O_WRONLY | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC) |
| 3489 | O_CREAT | OPEN_BINARY, | |
| 771 | 3490 auto_saving ? auto_save_mode_bits : CREAT_MODE); |
| 428 | 3491 } |
| 3492 | |
| 3493 if (desc < 0) | |
| 3494 { | |
| 3495 #ifdef CLASH_DETECTION | |
| 3496 save_errno = errno; | |
| 3497 if (!auto_saving) unlock_file (lockname); | |
| 3498 errno = save_errno; | |
| 3499 #endif /* CLASH_DETECTION */ | |
| 563 | 3500 report_file_error ("Opening output file", filename); |
| 428 | 3501 } |
| 3502 | |
| 3503 { | |
| 3504 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil); | |
| 3505 Lisp_Object instream = Qnil, outstream = Qnil; | |
| 442 | 3506 struct gcpro nngcpro1, nngcpro2; |
| 3507 NNGCPRO2 (instream, outstream); | |
| 428 | 3508 |
| 3509 record_unwind_protect (close_file_unwind, desc_locative); | |
| 3510 | |
| 3511 if (!NILP (append)) | |
| 3512 { | |
| 3513 if (lseek (desc, 0, 2) < 0) | |
| 3514 { | |
| 3515 #ifdef CLASH_DETECTION | |
| 3516 if (!auto_saving) unlock_file (lockname); | |
| 3517 #endif /* CLASH_DETECTION */ | |
| 3518 report_file_error ("Lseek error", | |
| 563 | 3519 filename); |
| 428 | 3520 } |
| 3521 } | |
| 3522 | |
| 3523 failure = 0; | |
| 3524 | |
| 3525 /* Note: I tried increasing the buffering size, along with | |
| 3526 various other tricks, but nothing seemed to make much of | |
| 3527 a difference in the time it took to save a large file. | |
| 3528 (Actually that's not true. With a local disk, changing | |
| 3529 the buffer size doesn't seem to make much difference. | |
| 3530 With an NFS-mounted disk, it could make a lot of difference | |
| 3531 because you're affecting the number of network requests | |
| 3532 that need to be made, and there could be a large latency | |
| 3533 for each request. So I've increased the buffer size | |
| 3534 to 64K.) */ | |
| 3535 outstream = make_filedesc_output_stream (desc, 0, -1, 0); | |
| 3536 Lstream_set_buffering (XLSTREAM (outstream), | |
| 3537 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3538 outstream = | |
| 800 | 3539 make_coding_output_stream (XLSTREAM (outstream), codesys, |
| 3540 CODING_ENCODE, 0); | |
| 428 | 3541 Lstream_set_buffering (XLSTREAM (outstream), |
| 3542 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3543 if (STRINGP (start)) | |
| 3544 { | |
| 3545 instream = make_lisp_string_input_stream (start, 0, -1); | |
| 3546 start1 = 0; | |
| 3547 } | |
| 3548 else | |
| 3549 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1, | |
| 3550 LSTR_SELECTIVE | | |
| 3551 LSTR_IGNORE_ACCESSIBLE); | |
| 3552 failure = (0 > (a_write (outstream, instream, start1, | |
| 3553 &annotations))); | |
| 3554 save_errno = errno; | |
| 3555 /* Note that this doesn't close the desc since we created the | |
| 3556 stream without the LSTR_CLOSING flag, but it does | |
| 3557 flush out any buffered data. */ | |
| 3558 if (Lstream_close (XLSTREAM (outstream)) < 0) | |
| 3559 { | |
| 3560 failure = 1; | |
| 3561 save_errno = errno; | |
| 3562 } | |
| 3563 Lstream_close (XLSTREAM (instream)); | |
| 3564 | |
| 3565 #ifdef HAVE_FSYNC | |
| 3566 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). | |
| 3567 Disk full in NFS may be reported here. */ | |
| 3568 /* mib says that closing the file will try to write as fast as NFS can do | |
| 3569 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
|
3570 if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0 |
| 428 | 3571 /* If fsync fails with EINTR, don't treat that as serious. */ |
| 3572 && errno != EINTR) | |
| 3573 { | |
| 3574 failure = 1; | |
| 3575 save_errno = errno; | |
| 3576 } | |
| 3577 #endif /* HAVE_FSYNC */ | |
| 3578 | |
| 440 | 3579 /* Spurious "file has changed on disk" warnings used to be seen on |
| 3580 systems where close() can change the modtime. This is known to | |
| 3581 happen on various NFS file systems, on Windows, and on Linux. | |
| 3582 Rather than handling this on a per-system basis, we | |
| 771 | 3583 unconditionally do the qxe_stat() after the retry_close(). */ |
| 428 | 3584 |
| 3585 /* NFS can report a write failure now. */ | |
| 771 | 3586 if (retry_close (desc) < 0) |
| 428 | 3587 { |
| 3588 failure = 1; | |
| 3589 save_errno = errno; | |
| 3590 } | |
| 3591 | |
| 3592 /* Discard the close unwind-protect. Execute the one for | |
| 3593 build_annotations (switches back to the original current buffer | |
| 3594 as necessary). */ | |
| 3595 XCAR (desc_locative) = Qnil; | |
| 771 | 3596 unbind_to (speccount); |
| 442 | 3597 |
| 3598 NNUNGCPRO; | |
| 428 | 3599 } |
| 3600 | |
| 771 | 3601 qxe_stat (XSTRING_DATA (fn), &st); |
| 428 | 3602 |
| 3603 #ifdef CLASH_DETECTION | |
| 3604 if (!auto_saving) | |
| 3605 unlock_file (lockname); | |
| 3606 #endif /* CLASH_DETECTION */ | |
| 3607 | |
| 3608 /* Do this before reporting IO error | |
| 3609 to avoid a "file has changed on disk" warning on | |
| 3610 next attempt to save. */ | |
| 3611 if (visiting) | |
| 3612 current_buffer->modtime = st.st_mtime; | |
| 3613 | |
| 3614 if (failure) | |
| 442 | 3615 { |
| 3616 errno = save_errno; | |
| 563 | 3617 report_file_error ("Writing file", fn); |
| 442 | 3618 } |
| 428 | 3619 |
| 3620 if (visiting) | |
| 3621 { | |
| 3622 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3623 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3624 current_buffer->filename = visit_file; | |
| 3625 MARK_MODELINE_CHANGED; | |
| 3626 } | |
| 3627 else if (quietly) | |
| 3628 { | |
| 442 | 3629 NUNGCPRO; |
| 3630 UNGCPRO; | |
| 428 | 3631 return Qnil; |
| 3632 } | |
| 3633 | |
| 3634 if (!auto_saving) | |
| 3635 { | |
| 3636 if (visiting_other) | |
| 3637 message ("Wrote %s", XSTRING_DATA (visit_file)); | |
| 3638 else | |
| 3639 { | |
| 446 | 3640 Lisp_Object fsp = Qnil; |
| 442 | 3641 struct gcpro nngcpro1; |
| 3642 | |
| 3643 NNGCPRO1 (fsp); | |
| 428 | 3644 fsp = Ffile_symlink_p (fn); |
| 3645 if (NILP (fsp)) | |
| 3646 message ("Wrote %s", XSTRING_DATA (fn)); | |
| 3647 else | |
| 3648 message ("Wrote %s (symlink to %s)", | |
| 3649 XSTRING_DATA (fn), XSTRING_DATA (fsp)); | |
| 442 | 3650 NNUNGCPRO; |
| 428 | 3651 } |
| 3652 } | |
| 442 | 3653 NUNGCPRO; |
| 3654 UNGCPRO; | |
| 428 | 3655 return Qnil; |
| 3656 } | |
| 3657 | |
| 3658 /* #### This is such a load of shit!!!! There is no way we should define | |
| 3659 something so stupid as a subr, just sort the fucking list more | |
| 3660 intelligently. */ | |
| 3661 DEFUN ("car-less-than-car", Fcar_less_than_car, 2, 2, 0, /* | |
| 3662 Return t if (car A) is numerically less than (car B). | |
| 3663 */ | |
| 3664 (a, b)) | |
| 3665 { | |
| 3666 Lisp_Object objs[2]; | |
| 3667 objs[0] = Fcar (a); | |
| 3668 objs[1] = Fcar (b); | |
| 3669 return Flss (2, objs); | |
| 3670 } | |
| 3671 | |
| 3672 /* Heh heh heh, let's define this too, just to aggravate the person who | |
| 3673 wrote the above comment. */ | |
| 3674 DEFUN ("cdr-less-than-cdr", Fcdr_less_than_cdr, 2, 2, 0, /* | |
| 3675 Return t if (cdr A) is numerically less than (cdr B). | |
| 3676 */ | |
| 3677 (a, b)) | |
| 3678 { | |
| 3679 Lisp_Object objs[2]; | |
| 3680 objs[0] = Fcdr (a); | |
| 3681 objs[1] = Fcdr (b); | |
| 3682 return Flss (2, objs); | |
| 3683 } | |
| 3684 | |
| 3685 /* Build the complete list of annotations appropriate for writing out | |
| 3686 the text between START and END, by calling all the functions in | |
| 3687 write-region-annotate-functions and merging the lists they return. | |
| 3688 If one of these functions switches to a different buffer, we assume | |
| 3689 that buffer contains altered text. Therefore, the caller must | |
| 3690 make sure to restore the current buffer in all cases, | |
| 3691 as save-excursion would do. */ | |
| 3692 | |
| 3693 static Lisp_Object | |
| 3694 build_annotations (Lisp_Object start, Lisp_Object end) | |
| 3695 { | |
| 3696 /* This function can GC */ | |
| 3697 Lisp_Object annotations; | |
| 3698 Lisp_Object p, res; | |
| 3699 struct gcpro gcpro1, gcpro2; | |
| 793 | 3700 Lisp_Object original_buffer = wrap_buffer (current_buffer); |
| 3701 | |
| 428 | 3702 |
| 3703 annotations = Qnil; | |
| 3704 p = Vwrite_region_annotate_functions; | |
| 3705 GCPRO2 (annotations, p); | |
| 3706 while (!NILP (p)) | |
| 3707 { | |
| 3708 struct buffer *given_buffer = current_buffer; | |
| 3709 Vwrite_region_annotations_so_far = annotations; | |
| 3710 res = call2 (Fcar (p), start, end); | |
| 3711 /* If the function makes a different buffer current, | |
| 3712 assume that means this buffer contains altered text to be output. | |
| 3713 Reset START and END from the buffer bounds | |
| 3714 and discard all previous annotations because they should have | |
| 3715 been dealt with by this function. */ | |
| 3716 if (current_buffer != given_buffer) | |
| 3717 { | |
| 3718 start = make_int (BUF_BEGV (current_buffer)); | |
| 3719 end = make_int (BUF_ZV (current_buffer)); | |
| 3720 annotations = Qnil; | |
| 3721 } | |
| 3722 Flength (res); /* Check basic validity of return value */ | |
| 3723 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3724 p = Fcdr (p); | |
| 3725 } | |
| 3726 | |
| 3727 /* Now do the same for annotation functions implied by the file-format */ | |
| 3728 if (auto_saving && (!EQ (Vauto_save_file_format, Qt))) | |
| 3729 p = Vauto_save_file_format; | |
| 3730 else | |
| 3731 p = current_buffer->file_format; | |
| 3732 while (!NILP (p)) | |
| 3733 { | |
| 3734 struct buffer *given_buffer = current_buffer; | |
| 3735 Vwrite_region_annotations_so_far = annotations; | |
| 3736 res = call4 (Qformat_annotate_function, Fcar (p), start, end, | |
| 3737 original_buffer); | |
| 3738 if (current_buffer != given_buffer) | |
| 3739 { | |
| 3740 start = make_int (BUF_BEGV (current_buffer)); | |
| 3741 end = make_int (BUF_ZV (current_buffer)); | |
| 3742 annotations = Qnil; | |
| 3743 } | |
| 3744 Flength (res); | |
| 3745 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3746 p = Fcdr (p); | |
| 3747 } | |
| 3748 UNGCPRO; | |
| 3749 return annotations; | |
| 3750 } | |
| 3751 | |
| 3752 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until | |
| 3753 EOF is encountered), assuming they start at position POS in the buffer | |
| 3754 of string that STREAM refers to. Intersperse with them the annotations | |
| 3755 from *ANNOT that fall into the range of positions we are reading from, | |
| 3756 each at its appropriate position. | |
| 3757 | |
| 3758 Modify *ANNOT by discarding elements as we output them. | |
| 3759 The return value is negative in case of system call failure. */ | |
| 3760 | |
| 3761 /* 4K should probably be fine. We just need to reduce the number of | |
| 3762 function calls to reasonable level. The Lstream stuff itself will | |
| 3763 batch to 64K to reduce the number of system calls. */ | |
| 3764 | |
| 3765 #define A_WRITE_BATCH_SIZE 4096 | |
| 3766 | |
| 3767 static int | |
| 3768 a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3769 Lisp_Object *annot) | |
| 3770 { | |
| 3771 Lisp_Object tem; | |
| 3772 int nextpos; | |
| 3773 unsigned char largebuf[A_WRITE_BATCH_SIZE]; | |
| 3774 Lstream *instr = XLSTREAM (instream); | |
| 3775 Lstream *outstr = XLSTREAM (outstream); | |
| 3776 | |
| 3777 while (LISTP (*annot)) | |
| 3778 { | |
| 3779 tem = Fcar_safe (Fcar (*annot)); | |
| 3780 if (INTP (tem)) | |
| 3781 nextpos = XINT (tem); | |
| 3782 else | |
| 3783 nextpos = INT_MAX; | |
| 3784 #ifdef MULE | |
| 3785 /* If there are annotations left and we have Mule, then we | |
| 867 | 3786 have to do the I/O one ichar at a time so we can |
| 428 | 3787 determine when to insert the annotation. */ |
| 3788 if (!NILP (*annot)) | |
| 3789 { | |
| 867 | 3790 Ichar ch; |
| 3791 while (pos != nextpos && (ch = Lstream_get_ichar (instr)) != EOF) | |
| 428 | 3792 { |
| 867 | 3793 if (Lstream_put_ichar (outstr, ch) < 0) |
| 428 | 3794 return -1; |
| 3795 pos++; | |
| 3796 } | |
| 3797 } | |
| 3798 else | |
| 3799 #endif /* MULE */ | |
| 3800 { | |
| 3801 while (pos != nextpos) | |
| 3802 { | |
| 3803 /* Otherwise there is no point to that. Just go in batches. */ | |
| 3804 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE); | |
| 3805 | |
| 3806 chunk = Lstream_read (instr, largebuf, chunk); | |
| 3807 if (chunk < 0) | |
| 3808 return -1; | |
| 3809 if (chunk == 0) /* EOF */ | |
| 3810 break; | |
| 771 | 3811 if (Lstream_write (outstr, largebuf, chunk) < 0) |
| 428 | 3812 return -1; |
| 3813 pos += chunk; | |
| 3814 } | |
| 3815 } | |
| 3816 if (pos == nextpos) | |
| 3817 { | |
| 3818 tem = Fcdr (Fcar (*annot)); | |
| 3819 if (STRINGP (tem)) | |
| 3820 { | |
| 3821 if (Lstream_write (outstr, XSTRING_DATA (tem), | |
| 3822 XSTRING_LENGTH (tem)) < 0) | |
| 3823 return -1; | |
| 3824 } | |
| 3825 *annot = Fcdr (*annot); | |
| 3826 } | |
| 3827 else | |
| 3828 return 0; | |
| 3829 } | |
| 3830 return -1; | |
| 3831 } | |
| 3832 | |
| 3833 | |
| 3834 | |
| 3835 #if 0 | |
| 3836 #include <des_crypt.h> | |
| 3837 | |
| 3838 #define CRYPT_BLOCK_SIZE 8 /* bytes */ | |
| 3839 #define CRYPT_KEY_SIZE 8 /* bytes */ | |
| 3840 | |
| 3841 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /* | |
| 3842 Encrypt STRING using KEY. | |
| 3843 */ | |
| 3844 (string, key)) | |
| 3845 { | |
| 2367 | 3846 /* !!#### Needs work */ |
| 1333 | 3847 Extbyte *encrypted_string, *raw_key; |
| 3848 Extbyte *string_ext, *key_ext; | |
| 3849 Bytecount string_size_ext, key_size_ext, rounded_size, extra, key_size; | |
| 3850 | |
| 428 | 3851 CHECK_STRING (string); |
| 3852 CHECK_STRING (key); | |
| 3853 | |
| 1333 | 3854 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3855 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3856 | |
| 3857 extra = string_size_ext % CRYPT_BLOCK_SIZE; | |
| 3858 rounded_size = string_size_ext + extra; | |
| 851 | 3859 encrypted_string = ALLOCA (rounded_size + 1); |
| 1333 | 3860 memcpy (encrypted_string, string_ext, string_size_ext); |
| 428 | 3861 memset (encrypted_string + rounded_size - extra, 0, extra + 1); |
| 3862 | |
| 1333 | 3863 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3864 |
| 851 | 3865 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3866 memcpy (raw_key, key_ext, key_size); |
| 428 | 3867 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3868 | |
| 3869 ecb_crypt (raw_key, encrypted_string, rounded_size, | |
| 3870 DES_ENCRYPT | DES_SW); | |
| 1333 | 3871 return make_ext_string (encrypted_string, rounded_size, Qbinary); |
| 428 | 3872 } |
| 3873 | |
| 3874 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /* | |
| 3875 Decrypt STRING using KEY. | |
| 3876 */ | |
| 3877 (string, key)) | |
| 3878 { | |
| 1333 | 3879 Extbyte *decrypted_string, *raw_key; |
| 3880 Extbyte *string_ext, *key_ext; | |
| 3881 Bytecount string_size_ext, key_size_ext, string_size, key_size; | |
| 428 | 3882 |
| 3883 CHECK_STRING (string); | |
| 3884 CHECK_STRING (key); | |
| 3885 | |
| 1333 | 3886 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3887 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3888 | |
| 3889 string_size = string_size_ext + 1; | |
| 851 | 3890 decrypted_string = ALLOCA (string_size); |
| 1333 | 3891 memcpy (decrypted_string, string_ext, string_size); |
| 428 | 3892 decrypted_string[string_size - 1] = '\0'; |
| 3893 | |
| 1333 | 3894 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3895 |
| 851 | 3896 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3897 memcpy (raw_key, key_ext, key_size); |
| 428 | 3898 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3899 | |
| 3900 | |
| 3901 ecb_crypt (raw_key, decrypted_string, string_size, D | DES_SW); | |
| 1333 | 3902 return make_ext_string (decrypted_string, string_size - 1, Qbinary); |
| 428 | 3903 } |
| 3904 #endif /* 0 */ | |
| 3905 | |
| 3906 | |
| 3907 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /* | |
| 444 | 3908 Return t if last mod time of BUFFER's visited file matches what BUFFER records. |
| 428 | 3909 This means that the file has not been changed since it was visited or saved. |
| 3910 */ | |
| 444 | 3911 (buffer)) |
| 428 | 3912 { |
| 442 | 3913 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 3914 struct buffer *b; |
| 3915 struct stat st; | |
| 3916 Lisp_Object handler; | |
| 3917 | |
| 444 | 3918 CHECK_BUFFER (buffer); |
| 3919 b = XBUFFER (buffer); | |
| 428 | 3920 |
| 3921 if (!STRINGP (b->filename)) return Qt; | |
| 3922 if (b->modtime == 0) return Qt; | |
| 3923 | |
| 3924 /* If the file name has special constructs in it, | |
| 3925 call the corresponding file handler. */ | |
| 3926 handler = Ffind_file_name_handler (b->filename, | |
| 3927 Qverify_visited_file_modtime); | |
| 3928 if (!NILP (handler)) | |
| 444 | 3929 return call2 (handler, Qverify_visited_file_modtime, buffer); |
| 428 | 3930 |
| 771 | 3931 if (qxe_stat (XSTRING_DATA (b->filename), &st) < 0) |
| 428 | 3932 { |
| 3933 /* If the file doesn't exist now and didn't exist before, | |
| 3934 we say that it isn't modified, provided the error is a tame one. */ | |
| 3935 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
| 3936 st.st_mtime = -1; | |
| 3937 else | |
| 3938 st.st_mtime = 0; | |
| 3939 } | |
| 3940 if (st.st_mtime == b->modtime | |
| 3941 /* If both are positive, accept them if they are off by one second. */ | |
| 3942 || (st.st_mtime > 0 && b->modtime > 0 | |
| 3943 && (st.st_mtime == b->modtime + 1 | |
| 3944 || st.st_mtime == b->modtime - 1))) | |
| 3945 return Qt; | |
| 3946 return Qnil; | |
| 3947 } | |
| 3948 | |
| 3949 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /* | |
| 3950 Clear out records of last mod time of visited file. | |
| 3951 Next attempt to save will certainly not complain of a discrepancy. | |
| 3952 */ | |
| 3953 ()) | |
| 3954 { | |
| 3955 current_buffer->modtime = 0; | |
| 3956 return Qnil; | |
| 3957 } | |
| 3958 | |
| 3959 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /* | |
| 3960 Return the current buffer's recorded visited file modification time. | |
| 3961 The value is a list of the form (HIGH . LOW), like the time values | |
| 3962 that `file-attributes' returns. | |
| 3963 */ | |
| 3964 ()) | |
| 3965 { | |
| 3966 return time_to_lisp ((time_t) current_buffer->modtime); | |
| 3967 } | |
| 3968 | |
| 3969 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /* | |
| 3970 Update buffer's recorded modification time from the visited file's time. | |
| 3971 Useful if the buffer was not read from the file normally | |
| 3972 or if the file itself has been changed for some known benign reason. | |
| 3973 An argument specifies the modification time value to use | |
| 3974 \(instead of that of the visited file), in the form of a list | |
| 3975 \(HIGH . LOW) or (HIGH LOW). | |
| 3976 */ | |
| 3977 (time_list)) | |
| 3978 { | |
| 3979 /* This function can call lisp */ | |
| 3980 if (!NILP (time_list)) | |
| 3981 { | |
| 3982 time_t the_time; | |
| 3983 lisp_to_time (time_list, &the_time); | |
| 3984 current_buffer->modtime = (int) the_time; | |
| 3985 } | |
| 3986 else | |
| 3987 { | |
| 446 | 3988 Lisp_Object filename = Qnil; |
| 428 | 3989 struct stat st; |
| 3990 Lisp_Object handler; | |
| 3991 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 3992 | |
| 3993 GCPRO3 (filename, time_list, current_buffer->filename); | |
| 3994 filename = Fexpand_file_name (current_buffer->filename, Qnil); | |
| 3995 | |
| 3996 /* If the file name has special constructs in it, | |
| 3997 call the corresponding file handler. */ | |
| 3998 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); | |
| 3999 UNGCPRO; | |
| 4000 if (!NILP (handler)) | |
| 4001 /* The handler can find the file name the same way we did. */ | |
| 4002 return call2 (handler, Qset_visited_file_modtime, Qnil); | |
| 771 | 4003 else if (qxe_stat (XSTRING_DATA (filename), &st) >= 0) |
| 428 | 4004 current_buffer->modtime = st.st_mtime; |
| 4005 } | |
| 4006 | |
| 4007 return Qnil; | |
| 4008 } | |
| 4009 | |
| 4010 static Lisp_Object | |
| 2286 | 4011 auto_save_error (Lisp_Object UNUSED (condition_object), |
| 4012 Lisp_Object UNUSED (ignored)) | |
| 428 | 4013 { |
| 4014 /* This function can call lisp */ | |
| 4015 if (gc_in_progress) | |
| 4016 return Qnil; | |
| 4017 /* Don't try printing an error message after everything is gone! */ | |
| 4018 if (preparing_for_armageddon) | |
| 4019 return Qnil; | |
| 4020 clear_echo_area (selected_frame (), Qauto_saving, 1); | |
| 4021 Fding (Qt, Qauto_save_error, Qnil); | |
| 4022 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 4023 Fsleep_for (make_int (1)); | |
| 4024 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name)); | |
| 4025 Fsleep_for (make_int (1)); | |
| 4026 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 4027 Fsleep_for (make_int (1)); | |
| 4028 return Qnil; | |
| 4029 } | |
| 4030 | |
| 4031 static Lisp_Object | |
| 2286 | 4032 auto_save_1 (Lisp_Object UNUSED (ignored)) |
| 428 | 4033 { |
| 4034 /* This function can call lisp */ | |
| 4035 /* #### I think caller is protecting current_buffer? */ | |
| 4036 struct stat st; | |
| 4037 Lisp_Object fn = current_buffer->filename; | |
| 4038 Lisp_Object a = current_buffer->auto_save_file_name; | |
| 4039 | |
| 4040 if (!STRINGP (a)) | |
| 4041 return (Qnil); | |
| 4042 | |
| 4043 /* Get visited file's mode to become the auto save file's mode. */ | |
| 4044 if (STRINGP (fn) && | |
| 771 | 4045 qxe_stat (XSTRING_DATA (fn), &st) >= 0) |
| 428 | 4046 /* But make sure we can overwrite it later! */ |
| 4047 auto_save_mode_bits = st.st_mode | 0600; | |
| 4048 else | |
| 4049 /* default mode for auto-save files of buffers with no file is | |
| 4050 readable by owner only. This may annoy some small number of | |
| 4051 people, but the alternative removes all privacy from email. */ | |
| 4052 auto_save_mode_bits = 0600; | |
| 4053 | |
| 4054 return | |
| 4055 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil, | |
| 771 | 4056 #if 1 /* #### Kyle wants it changed to not use escape-quoted. Think |
| 4057 carefully about how this works. */ | |
| 4266 | 4058 Qescape_quoted, |
| 771 | 4059 #else |
| 4266 | 4060 current_buffer->buffer_file_coding_system, |
| 428 | 4061 #endif |
| 4266 | 4062 Qnil); |
| 428 | 4063 } |
| 4064 | |
| 4065 static Lisp_Object | |
| 2286 | 4066 auto_save_expand_name_error (Lisp_Object condition_object, |
| 4067 Lisp_Object UNUSED (ignored)) | |
| 428 | 4068 { |
| 771 | 4069 warn_when_safe_lispobj |
| 793 | 4070 (Qfile, Qerror, |
| 771 | 4071 Fcons (build_msg_string ("Invalid auto-save list-file"), |
| 4072 Fcons (Vauto_save_list_file_name, | |
| 4073 condition_object))); | |
| 428 | 4074 return Qnil; |
| 4075 } | |
| 4076 | |
| 4077 static Lisp_Object | |
| 4078 auto_save_expand_name (Lisp_Object name) | |
| 4079 { | |
| 4080 struct gcpro gcpro1; | |
| 4081 | |
| 4082 /* note that caller did NOT gc protect name, so we do it. */ | |
| 771 | 4083 /* [[dmoore - this might not be necessary, if condition_case_1 |
| 4084 protects it. but I don't think it does.]] indeed it doesn't. --ben */ | |
| 428 | 4085 GCPRO1 (name); |
| 4086 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil)); | |
| 4087 } | |
| 4088 | |
| 4089 | |
| 4090 static Lisp_Object | |
| 4091 do_auto_save_unwind (Lisp_Object fd) | |
| 4092 { | |
| 771 | 4093 retry_close (XINT (fd)); |
| 428 | 4094 return (fd); |
| 4095 } | |
| 4096 | |
| 4097 /* Fdo_auto_save() checks whether a GC is in progress when it is called, | |
| 4098 and if so, tries to avoid touching lisp objects. | |
| 4099 | |
| 4100 The only time that Fdo_auto_save() is called while GC is in progress | |
| 2500 | 4101 is if we're going down, as a result of an ABORT() or a kill signal. |
| 428 | 4102 It's fairly important that we generate autosave files in that case! |
| 4103 */ | |
| 4104 | |
| 4105 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /* | |
| 4106 Auto-save all buffers that need it. | |
| 4107 This is all buffers that have auto-saving enabled | |
| 4108 and are changed since last auto-saved. | |
| 4109 Auto-saving writes the buffer into a file | |
| 4110 so that your editing is not lost if the system crashes. | |
| 4111 This file is not the file you visited; that changes only when you save. | |
| 4112 Normally we run the normal hook `auto-save-hook' before saving. | |
| 4113 | |
| 4114 Non-nil first argument means do not print any message if successful. | |
| 4115 Non-nil second argument means save only current buffer. | |
| 4116 */ | |
| 4117 (no_message, current_only)) | |
| 4118 { | |
| 4119 /* This function can call lisp */ | |
| 4120 struct buffer *b; | |
| 4121 Lisp_Object tail, buf; | |
| 4122 int auto_saved = 0; | |
| 4123 int do_handled_files; | |
| 4124 Lisp_Object oquit = Qnil; | |
| 4125 Lisp_Object listfile = Qnil; | |
| 4126 Lisp_Object old; | |
| 4127 int listdesc = -1; | |
| 4128 int speccount = specpdl_depth (); | |
| 4129 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4130 | |
| 793 | 4131 old = wrap_buffer (current_buffer); |
| 428 | 4132 GCPRO3 (oquit, listfile, old); |
| 4133 check_quit (); /* make Vquit_flag accurate */ | |
| 4134 /* Ordinarily don't quit within this function, | |
| 4135 but don't make it impossible to quit (in case we get hung in I/O). */ | |
| 4136 oquit = Vquit_flag; | |
| 4137 Vquit_flag = Qnil; | |
| 4138 | |
| 4139 /* No further GCPRO needed, because (when it matters) all Lisp_Object | |
| 4140 variables point to non-strings reached from Vbuffer_alist. */ | |
| 4141 | |
| 4142 if (minibuf_level != 0 || preparing_for_armageddon) | |
| 4143 no_message = Qt; | |
| 4144 | |
| 4145 run_hook (Qauto_save_hook); | |
| 4146 | |
| 4147 if (STRINGP (Vauto_save_list_file_name)) | |
| 4148 listfile = condition_case_1 (Qt, | |
| 4149 auto_save_expand_name, | |
| 4150 Vauto_save_list_file_name, | |
| 4151 auto_save_expand_name_error, Qnil); | |
| 4152 | |
| 853 | 4153 internal_bind_int (&auto_saving, 1); |
| 428 | 4154 |
| 4155 /* First, save all files which don't have handlers. If Emacs is | |
| 4156 crashing, the handlers may tweak what is causing Emacs to crash | |
| 4157 in the first place, and it would be a shame if Emacs failed to | |
| 4158 autosave perfectly ordinary files because it couldn't handle some | |
| 4159 ange-ftp'd file. */ | |
| 4160 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
| 4161 { | |
| 4162 for (tail = Vbuffer_alist; | |
| 4163 CONSP (tail); | |
| 4164 tail = XCDR (tail)) | |
| 4165 { | |
| 4166 buf = XCDR (XCAR (tail)); | |
| 4167 b = XBUFFER (buf); | |
| 4168 | |
| 4169 if (!NILP (current_only) | |
| 4170 && b != current_buffer) | |
| 4171 continue; | |
| 4172 | |
| 4173 /* Don't auto-save indirect buffers. | |
| 4174 The base buffer takes care of it. */ | |
| 4175 if (b->base_buffer) | |
| 4176 continue; | |
| 4177 | |
| 4178 /* Check for auto save enabled | |
| 4179 and file changed since last auto save | |
| 4180 and file changed since last real save. */ | |
| 4181 if (STRINGP (b->auto_save_file_name) | |
| 4182 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) | |
| 4183 && b->auto_save_modified < BUF_MODIFF (b) | |
| 4184 /* -1 means we've turned off autosaving for a while--see below. */ | |
| 4185 && XINT (b->saved_size) >= 0 | |
| 4186 && (do_handled_files | |
| 4187 || NILP (Ffind_file_name_handler (b->auto_save_file_name, | |
| 4188 Qwrite_region)))) | |
| 4189 { | |
| 4190 EMACS_TIME before_time, after_time; | |
| 4191 | |
| 4192 EMACS_GET_TIME (before_time); | |
| 4193 /* If we had a failure, don't try again for 20 minutes. */ | |
| 4194 if (!preparing_for_armageddon | |
| 4195 && b->auto_save_failure_time >= 0 | |
| 4196 && (EMACS_SECS (before_time) - b->auto_save_failure_time < | |
| 4197 1200)) | |
| 4198 continue; | |
| 4199 | |
| 4200 if (!preparing_for_armageddon && | |
| 4201 (XINT (b->saved_size) * 10 | |
| 4202 > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
| 4203 /* A short file is likely to change a large fraction; | |
| 4204 spare the user annoying messages. */ | |
| 4205 && XINT (b->saved_size) > 5000 | |
| 4206 /* These messages are frequent and annoying for `*mail*'. */ | |
| 4207 && !NILP (b->filename) | |
| 4208 && NILP (no_message) | |
| 4209 && disable_auto_save_when_buffer_shrinks) | |
| 4210 { | |
| 4211 /* It has shrunk too much; turn off auto-saving here. | |
| 4212 Unless we're about to crash, in which case auto-save it | |
| 4213 anyway. | |
| 4214 */ | |
| 4215 message | |
| 4216 ("Buffer %s has shrunk a lot; auto save turned off there", | |
| 4217 XSTRING_DATA (b->name)); | |
| 4218 /* Turn off auto-saving until there's a real save, | |
| 4219 and prevent any more warnings. */ | |
| 4220 b->saved_size = make_int (-1); | |
| 4221 if (!gc_in_progress) | |
| 4222 Fsleep_for (make_int (1)); | |
| 4223 continue; | |
| 4224 } | |
| 4225 set_buffer_internal (b); | |
| 4226 if (!auto_saved && NILP (no_message)) | |
| 4227 { | |
| 1333 | 4228 static const Ibyte *msg = (const Ibyte *) "Auto-saving..."; |
| 428 | 4229 echo_area_message (selected_frame (), msg, Qnil, |
| 1333 | 4230 0, qxestrlen (msg), |
| 428 | 4231 Qauto_saving); |
| 4232 } | |
| 4233 | |
| 4234 /* Open the auto-save list file, if necessary. | |
| 4235 We only do this now so that the file only exists | |
| 4236 if we actually auto-saved any files. */ | |
| 444 | 4237 if (!auto_saved && !inhibit_auto_save_session |
| 4238 && !NILP (Vauto_save_list_file_prefix) | |
| 4239 && STRINGP (listfile) && listdesc < 0) | |
| 428 | 4240 { |
| 771 | 4241 listdesc = |
| 4242 qxe_open (XSTRING_DATA (listfile), | |
| 4243 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY, | |
| 4244 CREAT_MODE); | |
| 428 | 4245 |
| 4246 /* Arrange to close that file whether or not we get | |
| 4247 an error. */ | |
| 4248 if (listdesc >= 0) | |
| 4249 record_unwind_protect (do_auto_save_unwind, | |
| 4250 make_int (listdesc)); | |
| 4251 } | |
| 4252 | |
| 4253 /* Record all the buffers that we are auto-saving in | |
| 4254 the special file that lists them. For each of | |
| 4255 these buffers, record visited name (if any) and | |
| 4256 auto save name. */ | |
| 4257 if (listdesc >= 0) | |
| 4258 { | |
| 442 | 4259 const Extbyte *auto_save_file_name_ext; |
| 665 | 4260 Bytecount auto_save_file_name_ext_len; |
| 428 | 4261 |
| 440 | 4262 TO_EXTERNAL_FORMAT (LISP_STRING, b->auto_save_file_name, |
| 4263 ALLOCA, (auto_save_file_name_ext, | |
| 4264 auto_save_file_name_ext_len), | |
| 771 | 4265 Qescape_quoted); |
| 428 | 4266 if (!NILP (b->filename)) |
| 4267 { | |
| 442 | 4268 const Extbyte *filename_ext; |
| 665 | 4269 Bytecount filename_ext_len; |
| 428 | 4270 |
| 440 | 4271 TO_EXTERNAL_FORMAT (LISP_STRING, b->filename, |
| 4272 ALLOCA, (filename_ext, | |
| 4273 filename_ext_len), | |
| 771 | 4274 Qescape_quoted); |
| 4275 retry_write (listdesc, filename_ext, filename_ext_len); | |
| 428 | 4276 } |
| 771 | 4277 retry_write (listdesc, "\n", 1); |
| 4278 retry_write (listdesc, auto_save_file_name_ext, | |
| 428 | 4279 auto_save_file_name_ext_len); |
| 771 | 4280 retry_write (listdesc, "\n", 1); |
| 428 | 4281 } |
| 4282 | |
| 4283 /* dmoore - In a bad scenario we've set b=XBUFFER(buf) | |
| 4284 based on values in Vbuffer_alist. auto_save_1 may | |
| 4285 cause lisp handlers to run. Those handlers may kill | |
| 4286 the buffer and then GC. Since the buffer is killed, | |
| 4287 it's no longer in Vbuffer_alist so it might get reaped | |
| 4288 by the GC. We also need to protect tail. */ | |
| 4289 /* #### There is probably a lot of other code which has | |
| 4290 pointers into buffers which may get blown away by | |
| 4291 handlers. */ | |
| 4292 { | |
| 4293 struct gcpro ngcpro1, ngcpro2; | |
| 4294 NGCPRO2 (buf, tail); | |
| 4295 condition_case_1 (Qt, | |
| 4296 auto_save_1, Qnil, | |
| 4297 auto_save_error, Qnil); | |
| 4298 NUNGCPRO; | |
| 4299 } | |
| 4300 /* Handler killed our saved current-buffer! Pick any. */ | |
| 4301 if (!BUFFER_LIVE_P (XBUFFER (old))) | |
| 793 | 4302 old = wrap_buffer (current_buffer); |
| 428 | 4303 |
| 4304 set_buffer_internal (XBUFFER (old)); | |
| 4305 auto_saved++; | |
| 4306 | |
| 4307 /* Handler killed their own buffer! */ | |
| 4308 if (!BUFFER_LIVE_P(b)) | |
| 4309 continue; | |
| 4310 | |
| 4311 b->auto_save_modified = BUF_MODIFF (b); | |
| 4312 b->saved_size = make_int (BUF_SIZE (b)); | |
| 4313 EMACS_GET_TIME (after_time); | |
| 4314 /* If auto-save took more than 60 seconds, | |
| 4315 assume it was an NFS failure that got a timeout. */ | |
| 4316 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
| 4317 b->auto_save_failure_time = EMACS_SECS (after_time); | |
| 4318 } | |
| 4319 } | |
| 4320 } | |
| 4321 | |
| 4322 /* Prevent another auto save till enough input events come in. */ | |
| 4323 if (auto_saved) | |
| 4324 record_auto_save (); | |
| 4325 | |
| 4326 /* If we didn't save anything into the listfile, remove the old | |
| 4327 one because nothing needed to be auto-saved. Do this afterwards | |
| 4328 rather than before in case we get a crash attempting to autosave | |
| 4329 (in that case we'd still want the old one around). */ | |
| 4330 if (listdesc < 0 && !auto_saved && STRINGP (listfile)) | |
| 771 | 4331 qxe_unlink (XSTRING_DATA (listfile)); |
| 428 | 4332 |
| 4333 /* Show "...done" only if the echo area would otherwise be empty. */ | |
| 4334 if (auto_saved && NILP (no_message) | |
| 4335 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0))) | |
| 4336 { | |
| 1333 | 4337 static const Ibyte *msg = (const Ibyte *)"Auto-saving...done"; |
| 428 | 4338 echo_area_message (selected_frame (), msg, Qnil, 0, |
| 1333 | 4339 qxestrlen (msg), Qauto_saving); |
| 428 | 4340 } |
| 4341 | |
| 4342 Vquit_flag = oquit; | |
| 4343 | |
| 771 | 4344 RETURN_UNGCPRO (unbind_to (speccount)); |
| 428 | 4345 } |
| 4346 | |
| 4347 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /* | |
| 4348 Mark current buffer as auto-saved with its current text. | |
| 4349 No auto-save file will be written until the buffer changes again. | |
| 4350 */ | |
| 4351 ()) | |
| 4352 { | |
| 4353 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer); | |
| 4354 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 4355 current_buffer->auto_save_failure_time = -1; | |
| 4356 return Qnil; | |
| 4357 } | |
| 4358 | |
| 4359 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /* | |
| 4360 Clear any record of a recent auto-save failure in the current buffer. | |
| 4361 */ | |
| 4362 ()) | |
| 4363 { | |
| 4364 current_buffer->auto_save_failure_time = -1; | |
| 4365 return Qnil; | |
| 4366 } | |
| 4367 | |
| 4368 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /* | |
| 4369 Return t if buffer has been auto-saved since last read in or saved. | |
| 4370 */ | |
| 4371 ()) | |
| 4372 { | |
| 4373 return (BUF_SAVE_MODIFF (current_buffer) < | |
| 4374 current_buffer->auto_save_modified) ? Qt : Qnil; | |
| 4375 } | |
| 4376 | |
| 4377 | |
| 4378 /************************************************************************/ | |
| 4379 /* initialization */ | |
| 4380 /************************************************************************/ | |
| 4381 | |
| 4382 void | |
| 4383 syms_of_fileio (void) | |
| 4384 { | |
| 563 | 4385 DEFSYMBOL (Qexpand_file_name); |
| 4386 DEFSYMBOL (Qfile_truename); | |
| 4387 DEFSYMBOL (Qsubstitute_in_file_name); | |
| 4388 DEFSYMBOL (Qdirectory_file_name); | |
| 4389 DEFSYMBOL (Qfile_name_directory); | |
| 4390 DEFSYMBOL (Qfile_name_nondirectory); | |
| 996 | 4391 DEFSYMBOL (Qfile_name_sans_extension); |
| 563 | 4392 DEFSYMBOL (Qunhandled_file_name_directory); |
| 4393 DEFSYMBOL (Qfile_name_as_directory); | |
| 4394 DEFSYMBOL (Qcopy_file); | |
| 4395 DEFSYMBOL (Qmake_directory_internal); | |
| 4396 DEFSYMBOL (Qdelete_directory); | |
| 4397 DEFSYMBOL (Qdelete_file); | |
| 4398 DEFSYMBOL (Qrename_file); | |
| 4399 DEFSYMBOL (Qadd_name_to_file); | |
| 4400 DEFSYMBOL (Qmake_symbolic_link); | |
| 844 | 4401 DEFSYMBOL (Qmake_temp_name); |
| 563 | 4402 DEFSYMBOL (Qfile_exists_p); |
| 4403 DEFSYMBOL (Qfile_executable_p); | |
| 4404 DEFSYMBOL (Qfile_readable_p); | |
| 4405 DEFSYMBOL (Qfile_symlink_p); | |
| 4406 DEFSYMBOL (Qfile_writable_p); | |
| 4407 DEFSYMBOL (Qfile_directory_p); | |
| 4408 DEFSYMBOL (Qfile_regular_p); | |
| 4409 DEFSYMBOL (Qfile_accessible_directory_p); | |
| 4410 DEFSYMBOL (Qfile_modes); | |
| 4411 DEFSYMBOL (Qset_file_modes); | |
| 4412 DEFSYMBOL (Qfile_newer_than_file_p); | |
| 4413 DEFSYMBOL (Qinsert_file_contents); | |
| 4414 DEFSYMBOL (Qwrite_region); | |
| 4415 DEFSYMBOL (Qverify_visited_file_modtime); | |
| 4416 DEFSYMBOL (Qset_visited_file_modtime); | |
| 4417 DEFSYMBOL (Qcar_less_than_car); /* Vomitous! */ | |
| 4266 | 4418 DEFSYMBOL (Qexcl); |
| 563 | 4419 |
| 4420 DEFSYMBOL (Qauto_save_hook); | |
| 4421 DEFSYMBOL (Qauto_save_error); | |
| 4422 DEFSYMBOL (Qauto_saving); | |
| 4423 | |
| 4424 DEFSYMBOL (Qformat_decode); | |
| 4425 DEFSYMBOL (Qformat_annotate_function); | |
| 4426 | |
| 4427 DEFSYMBOL (Qcompute_buffer_file_truename); | |
| 4428 | |
| 442 | 4429 DEFERROR_STANDARD (Qfile_already_exists, Qfile_error); |
| 428 | 4430 |
| 4431 DEFSUBR (Ffind_file_name_handler); | |
| 4432 | |
| 4433 DEFSUBR (Ffile_name_directory); | |
| 4434 DEFSUBR (Ffile_name_nondirectory); | |
| 4435 DEFSUBR (Funhandled_file_name_directory); | |
| 4436 DEFSUBR (Ffile_name_as_directory); | |
| 4437 DEFSUBR (Fdirectory_file_name); | |
| 4438 DEFSUBR (Fmake_temp_name); | |
| 4439 DEFSUBR (Fexpand_file_name); | |
| 4440 DEFSUBR (Ffile_truename); | |
| 4441 DEFSUBR (Fsubstitute_in_file_name); | |
| 4442 DEFSUBR (Fcopy_file); | |
| 4443 DEFSUBR (Fmake_directory_internal); | |
| 4444 DEFSUBR (Fdelete_directory); | |
| 4445 DEFSUBR (Fdelete_file); | |
| 4446 DEFSUBR (Frename_file); | |
| 4447 DEFSUBR (Fadd_name_to_file); | |
| 4448 DEFSUBR (Fmake_symbolic_link); | |
| 4449 #ifdef HPUX_NET | |
| 4450 DEFSUBR (Fsysnetunam); | |
| 4451 #endif /* HPUX_NET */ | |
| 4452 DEFSUBR (Ffile_name_absolute_p); | |
| 4453 DEFSUBR (Ffile_exists_p); | |
| 4454 DEFSUBR (Ffile_executable_p); | |
| 4455 DEFSUBR (Ffile_readable_p); | |
| 4456 DEFSUBR (Ffile_writable_p); | |
| 4457 DEFSUBR (Ffile_symlink_p); | |
| 4458 DEFSUBR (Ffile_directory_p); | |
| 4459 DEFSUBR (Ffile_accessible_directory_p); | |
| 4460 DEFSUBR (Ffile_regular_p); | |
| 4461 DEFSUBR (Ffile_modes); | |
| 4462 DEFSUBR (Fset_file_modes); | |
| 4463 DEFSUBR (Fset_default_file_modes); | |
| 4464 DEFSUBR (Fdefault_file_modes); | |
| 4465 DEFSUBR (Funix_sync); | |
| 4466 DEFSUBR (Ffile_newer_than_file_p); | |
| 4467 DEFSUBR (Finsert_file_contents_internal); | |
| 4468 DEFSUBR (Fwrite_region_internal); | |
| 4469 DEFSUBR (Fcar_less_than_car); /* Vomitous! */ | |
| 4470 DEFSUBR (Fcdr_less_than_cdr); /* Yeah oh yeah bucko .... */ | |
| 4471 #if 0 | |
| 4472 DEFSUBR (Fencrypt_string); | |
| 4473 DEFSUBR (Fdecrypt_string); | |
| 4474 #endif | |
| 4475 DEFSUBR (Fverify_visited_file_modtime); | |
| 4476 DEFSUBR (Fclear_visited_file_modtime); | |
| 4477 DEFSUBR (Fvisited_file_modtime); | |
| 4478 DEFSUBR (Fset_visited_file_modtime); | |
| 4479 | |
| 4480 DEFSUBR (Fdo_auto_save); | |
| 4481 DEFSUBR (Fset_buffer_auto_saved); | |
| 4482 DEFSUBR (Fclear_buffer_auto_save_failure); | |
| 4483 DEFSUBR (Frecent_auto_save_p); | |
| 4484 } | |
| 4485 | |
| 4486 void | |
| 4487 vars_of_fileio (void) | |
| 4488 { | |
| 2526 | 4489 QSin_expand_file_name = |
| 4490 build_msg_string ("(in expand-file-name)"); | |
| 4491 staticpro (&QSin_expand_file_name); | |
| 4492 | |
| 428 | 4493 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /* |
| 4494 *Format in which to write auto-save files. | |
| 4495 Should be a list of symbols naming formats that are defined in `format-alist'. | |
| 4496 If it is t, which is the default, auto-save files are written in the | |
| 4497 same format as a regular save would use. | |
| 4498 */ ); | |
| 4499 Vauto_save_file_format = Qt; | |
| 4500 | |
| 4501 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /* | |
| 4502 *Alist of elements (REGEXP . HANDLER) for file names handled specially. | |
| 4503 If a file name matches REGEXP, then all I/O on that file is done by calling | |
| 4504 HANDLER. | |
| 4505 | |
| 4506 The first argument given to HANDLER is the name of the I/O primitive | |
| 4507 to be handled; the remaining arguments are the arguments that were | |
| 4508 passed to that primitive. For example, if you do | |
| 4509 (file-exists-p FILENAME) | |
| 4510 and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
| 4511 (funcall HANDLER 'file-exists-p FILENAME) | |
| 4512 The function `find-file-name-handler' checks this list for a handler | |
| 4513 for its argument. | |
| 4514 */ ); | |
| 4515 Vfile_name_handler_alist = Qnil; | |
| 4516 | |
| 4517 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /* | |
| 4518 A list of functions to be called at the end of `insert-file-contents'. | |
| 4519 Each is passed one argument, the number of bytes inserted. It should return | |
| 4520 the new byte count, and leave point the same. If `insert-file-contents' is | |
| 4521 intercepted by a handler from `file-name-handler-alist', that handler is | |
| 4522 responsible for calling the after-insert-file-functions if appropriate. | |
| 4523 */ ); | |
| 4524 Vafter_insert_file_functions = Qnil; | |
| 4525 | |
| 4526 DEFVAR_LISP ("write-region-annotate-functions", | |
| 4527 &Vwrite_region_annotate_functions /* | |
| 4528 A list of functions to be called at the start of `write-region'. | |
| 4529 Each is passed two arguments, START and END, as for `write-region'. | |
| 4530 It should return a list of pairs (POSITION . STRING) of strings to be | |
| 4531 effectively inserted at the specified positions of the file being written | |
| 4532 \(1 means to insert before the first byte written). The POSITIONs must be | |
| 4533 sorted into increasing order. If there are several functions in the list, | |
| 4534 the several lists are merged destructively. | |
| 4535 */ ); | |
| 4536 Vwrite_region_annotate_functions = Qnil; | |
| 4537 | |
| 4538 DEFVAR_LISP ("write-region-annotations-so-far", | |
| 4539 &Vwrite_region_annotations_so_far /* | |
| 4540 When an annotation function is called, this holds the previous annotations. | |
| 4541 These are the annotations made by other annotation functions | |
| 4542 that were already called. See also `write-region-annotate-functions'. | |
| 4543 */ ); | |
| 4544 Vwrite_region_annotations_so_far = Qnil; | |
| 4545 | |
| 4546 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /* | |
| 4547 A list of file name handlers that temporarily should not be used. | |
| 4548 This applies only to the operation `inhibit-file-name-operation'. | |
| 4549 */ ); | |
| 4550 Vinhibit_file_name_handlers = Qnil; | |
| 4551 | |
| 4552 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /* | |
| 4553 The operation for which `inhibit-file-name-handlers' is applicable. | |
| 4554 */ ); | |
| 4555 Vinhibit_file_name_operation = Qnil; | |
| 4556 | |
| 4557 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /* | |
| 4558 File name in which we write a list of all auto save file names. | |
| 4559 */ ); | |
| 4560 Vauto_save_list_file_name = Qnil; | |
| 4561 | |
|
4499
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4562 #ifdef HAVE_FSYNC |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4563 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
|
4564 *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
|
4565 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
|
4566 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
|
4567 */ ); |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4568 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
|
4569 #endif |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4570 |
| 444 | 4571 DEFVAR_LISP ("auto-save-list-file-prefix", &Vauto_save_list_file_prefix /* |
| 4572 Prefix for generating auto-save-list-file-name. | |
| 4573 Emacs's pid and the system name will be appended to | |
| 4574 this prefix to create a unique file name. | |
| 4575 */ ); | |
| 4576 Vauto_save_list_file_prefix = build_string ("~/.saves-"); | |
| 4577 | |
| 4578 DEFVAR_BOOL ("inhibit-auto-save-session", &inhibit_auto_save_session /* | |
| 4579 When non-nil, inhibit auto save list file creation. | |
| 4580 */ ); | |
| 4581 inhibit_auto_save_session = 0; | |
| 4582 | |
| 428 | 4583 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks", |
| 4584 &disable_auto_save_when_buffer_shrinks /* | |
| 4585 If non-nil, auto-saving is disabled when a buffer shrinks too much. | |
| 4586 This is to prevent you from losing your edits if you accidentally | |
| 4587 delete a large chunk of the buffer and don't notice it until too late. | |
| 4588 Saving the buffer normally turns auto-save back on. | |
| 4589 */ ); | |
| 4590 disable_auto_save_when_buffer_shrinks = 1; | |
| 4591 | |
| 4592 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /* | |
| 4593 Directory separator character for built-in functions that return file names. | |
| 4594 The value should be either ?/ or ?\\ (any other value is treated as ?\\). | |
| 4595 This variable affects the built-in functions only on Windows, | |
| 4596 on other platforms, it is initialized so that Lisp code can find out | |
| 4597 what the normal separator is. | |
| 4598 */ ); | |
| 771 | 4599 Vdirectory_sep_char = make_char (DEFAULT_DIRECTORY_SEP); |
| 428 | 4600 } |
| 442 | 4601 |
| 4602 void | |
| 4603 reinit_vars_of_fileio (void) | |
| 4604 { | |
| 4605 /* We want temp_name_rand to be initialized to a value likely to be | |
| 4606 unique to the process, not to the executable. The danger is that | |
| 4607 two different XEmacs processes using the same binary on different | |
| 4608 machines creating temp files in the same directory will be | |
| 4609 unlucky enough to have the same pid. If we randomize using | |
| 4610 process startup time, then in practice they will be unlikely to | |
| 4611 collide. We use the microseconds field so that scripts that start | |
| 4612 simultaneous XEmacs processes on multiple machines will have less | |
| 4613 chance of collision. */ | |
| 4614 { | |
| 4615 EMACS_TIME thyme; | |
| 4616 | |
| 4617 EMACS_GET_TIME (thyme); | |
| 4618 temp_name_rand = (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme)); | |
| 4619 } | |
| 4620 } |