Mercurial > hg > xemacs-beta
annotate src/fileio.c @ 4759:aa5ed11f473b
Remove support for obsolete systems. See xemacs-patches message with ID
<870180fe0911101613m6b8efa4bpf083fd9013950807@mail.gmail.com>.
| author | Jerry James <james@xemacs.org> |
|---|---|
| date | Wed, 18 Nov 2009 08:49:14 -0700 |
| parents | a5210e70ffbe |
| children | c12b646d84ee |
| 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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111 #ifdef HAVE_FSYNC |
|
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changeset
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112 /* Nonzero means skip the call to fsync in Fwrite-region. */ |
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113 int write_region_inhibit_fsync; |
|
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parents:
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changeset
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114 #endif |
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Aidan Kehoe <kehoea@parhasard.net>
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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 | |
|
4383
1e04b9c8125b
Correct the make-temp-name docstring.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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)) | |
|
4733
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No need to fatal () on startup if $PWD doesn't exist; chdir to "/" instead.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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, |
| 797 call3 (handler, Qexpand_file_name, | |
| 798 name, default_directory)); | |
| 428 | 799 } |
| 800 | |
| 801 o = XSTRING_DATA (default_directory); | |
| 802 | |
| 803 /* Make sure DEFAULT_DIRECTORY is properly expanded. | |
| 804 It would be better to do this down below where we actually use | |
| 805 default_directory. Unfortunately, calling Fexpand_file_name recursively | |
| 806 could invoke GC, and the strings might be relocated. This would | |
| 807 be annoying because we have pointers into strings lying around | |
| 808 that would need adjusting, and people would add new pointers to | |
| 809 the code and forget to adjust them, resulting in intermittent bugs. | |
| 810 Putting this call here avoids all that crud. | |
| 811 | |
| 812 The EQ test avoids infinite recursion. */ | |
| 813 if (! NILP (default_directory) && !EQ (default_directory, name) | |
| 814 /* Save time in some common cases - as long as default_directory | |
| 815 is not relative, it can be canonicalized with name below (if it | |
| 816 is needed at all) without requiring it to be expanded now. */ | |
| 657 | 817 #ifdef WIN32_FILENAMES |
| 442 | 818 /* Detect Windows file names with drive specifiers. */ |
| 428 | 819 && ! (IS_DRIVE (o[0]) && (IS_DEVICE_SEP (o[1]) && IS_DIRECTORY_SEP (o[2]))) |
| 820 /* Detect Windows file names in UNC format. */ | |
| 821 && ! (IS_DIRECTORY_SEP (o[0]) && IS_DIRECTORY_SEP (o[1])) | |
| 657 | 822 #endif /* not WIN32_FILENAMES */ |
| 823 #ifndef WIN32_NATIVE | |
| 428 | 824 /* Detect Unix absolute file names (/... alone is not absolute on |
| 442 | 825 Windows). */ |
| 428 | 826 && ! (IS_DIRECTORY_SEP (o[0])) |
| 442 | 827 #endif /* not WIN32_NATIVE */ |
| 428 | 828 ) |
| 442 | 829 |
| 830 default_directory = Fexpand_file_name (default_directory, Qnil); | |
| 428 | 831 |
| 832 #ifdef FILE_SYSTEM_CASE | |
| 833 name = FILE_SYSTEM_CASE (name); | |
| 834 #endif | |
| 835 | |
| 836 /* #### dmoore - this is ugly, clean this up. Looks like nm pointing | |
| 837 into name should be safe during all of this, though. */ | |
| 838 nm = XSTRING_DATA (name); | |
| 839 | |
| 657 | 840 #ifdef WIN32_FILENAMES |
| 428 | 841 /* We will force directory separators to be either all \ or /, so make |
| 842 a local copy to modify, even if there ends up being no change. */ | |
| 867 | 843 nm = qxestrcpy (alloca_ibytes (qxestrlen (nm) + 1), nm); |
| 771 | 844 |
| 845 /* Note if special escape prefix is present, but remove for now. */ | |
| 846 if (nm[0] == '/' && nm[1] == ':') | |
| 847 { | |
| 848 is_escaped = 1; | |
| 849 nm += 2; | |
| 850 } | |
| 428 | 851 |
| 852 /* Find and remove drive specifier if present; this makes nm absolute | |
| 853 even if the rest of the name appears to be relative. */ | |
| 854 { | |
| 867 | 855 Ibyte *colon = qxestrrchr (nm, ':'); |
| 428 | 856 |
| 857 if (colon) | |
| 657 | 858 { |
| 428 | 859 /* Only recognize colon as part of drive specifier if there is a |
| 860 single alphabetic character preceding the colon (and if the | |
| 861 character before the drive letter, if present, is a directory | |
| 862 separator); this is to support the remote system syntax used by | |
| 863 ange-ftp, and the "po:username" syntax for POP mailboxes. */ | |
| 864 look_again: | |
| 865 if (nm == colon) | |
| 866 nm++; | |
| 867 else if (IS_DRIVE (colon[-1]) | |
| 868 && (colon == nm + 1 || IS_DIRECTORY_SEP (colon[-2]))) | |
| 869 { | |
| 870 drive = colon[-1]; | |
| 871 nm = colon + 1; | |
| 872 } | |
| 873 else | |
| 874 { | |
| 875 while (--colon >= nm) | |
| 876 if (colon[0] == ':') | |
| 877 goto look_again; | |
| 878 } | |
| 657 | 879 } |
| 428 | 880 } |
| 881 | |
| 882 /* If we see "c://somedir", we want to strip the first slash after the | |
| 883 colon when stripping the drive letter. Otherwise, this expands to | |
| 884 "//somedir". */ | |
| 885 if (drive && IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 886 nm++; | |
| 657 | 887 #endif /* WIN32_FILENAMES */ |
| 428 | 888 |
| 771 | 889 #ifdef WIN32_FILENAMES |
| 890 /* Discard any previous drive specifier if nm is now in UNC format. */ | |
| 891 if (IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) | |
| 892 { | |
| 893 drive = 0; | |
| 894 } | |
| 895 #endif | |
| 896 | |
| 428 | 897 /* If nm is absolute, look for /./ or /../ sequences; if none are |
| 898 found, we can probably return right away. We will avoid allocating | |
| 899 a new string if name is already fully expanded. */ | |
| 900 if ( | |
| 901 IS_DIRECTORY_SEP (nm[0]) | |
| 442 | 902 #ifdef WIN32_NATIVE |
| 771 | 903 && (drive || IS_DIRECTORY_SEP (nm[1])) && !is_escaped |
| 428 | 904 #endif |
| 905 ) | |
| 906 { | |
| 907 /* If it turns out that the filename we want to return is just a | |
| 908 suffix of FILENAME, we don't need to go through and edit | |
| 909 things; we just need to construct a new string using data | |
| 910 starting at the middle of FILENAME. If we set lose to a | |
| 911 non-zero value, that means we've discovered that we can't do | |
| 912 that cool trick. */ | |
| 913 int lose = 0; | |
| 914 | |
| 915 p = nm; | |
| 916 while (*p) | |
| 917 { | |
| 918 /* Since we know the name is absolute, we can assume that each | |
| 919 element starts with a "/". */ | |
| 920 | |
| 921 /* "." and ".." are hairy. */ | |
| 922 if (IS_DIRECTORY_SEP (p[0]) | |
| 923 && p[1] == '.' | |
| 924 && (IS_DIRECTORY_SEP (p[2]) | |
| 925 || p[2] == 0 | |
| 926 || (p[2] == '.' && (IS_DIRECTORY_SEP (p[3]) | |
| 927 || p[3] == 0)))) | |
| 928 lose = 1; | |
| 771 | 929 /* We want to replace multiple `/' in a row with a single |
| 930 slash. */ | |
| 931 else if (p > nm | |
| 932 && IS_DIRECTORY_SEP (p[0]) | |
| 933 && IS_DIRECTORY_SEP (p[1])) | |
| 934 lose = 1; | |
| 428 | 935 p++; |
| 936 } | |
| 937 if (!lose) | |
| 938 { | |
| 657 | 939 #ifdef WIN32_FILENAMES |
| 940 if (drive || IS_DIRECTORY_SEP (nm[1])) | |
| 428 | 941 { |
| 867 | 942 Ibyte *newnm; |
| 771 | 943 |
| 657 | 944 if (IS_DIRECTORY_SEP (nm[1])) |
| 945 { | |
| 771 | 946 newnm = mswindows_canonicalize_filename (nm); |
| 947 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 948 name = build_intstring (newnm); | |
| 657 | 949 } |
| 771 | 950 else |
| 657 | 951 { |
| 771 | 952 /* drive must be set, so this is okay */ |
| 953 newnm = mswindows_canonicalize_filename (nm - 2); | |
| 954 if (qxestrcmp (newnm, XSTRING_DATA (name)) != 0) | |
| 955 { | |
| 956 name = build_intstring (newnm); | |
| 957 XSTRING_DATA (name)[0] = DRIVE_LETTER (drive); | |
| 958 XSTRING_DATA (name)[1] = ':'; | |
| 959 } | |
| 657 | 960 } |
| 1726 | 961 xfree (newnm, Ibyte *); |
| 2526 | 962 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 428 | 963 } |
| 771 | 964 #endif /* WIN32_FILENAMES */ |
| 657 | 965 #ifndef WIN32_NATIVE |
| 428 | 966 if (nm == XSTRING_DATA (name)) |
| 2526 | 967 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, name); |
| 968 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, | |
| 969 build_intstring (nm)); | |
| 442 | 970 #endif /* not WIN32_NATIVE */ |
| 428 | 971 } |
| 972 } | |
| 973 | |
| 974 /* At this point, nm might or might not be an absolute file name. We | |
| 975 need to expand ~ or ~user if present, otherwise prefix nm with | |
| 976 default_directory if nm is not absolute, and finally collapse /./ | |
| 977 and /foo/../ sequences. | |
| 978 | |
| 979 We set newdir to be the appropriate prefix if one is needed: | |
| 980 - the relevant user directory if nm starts with ~ or ~user | |
| 981 - the specified drive's working dir (DOS/NT only) if nm does not | |
| 982 start with / | |
| 983 - the value of default_directory. | |
| 984 | |
| 985 Note that these prefixes are not guaranteed to be absolute (except | |
| 986 for the working dir of a drive). Therefore, to ensure we always | |
| 987 return an absolute name, if the final prefix is not absolute we | |
| 988 append it to the current working directory. */ | |
| 989 | |
| 990 newdir = 0; | |
| 991 | |
| 992 if (nm[0] == '~') /* prefix ~ */ | |
| 993 { | |
| 994 if (IS_DIRECTORY_SEP (nm[1]) | |
| 995 || nm[1] == 0) /* ~ by itself */ | |
| 996 { | |
| 867 | 997 Ibyte *homedir = get_home_directory (); |
| 771 | 998 |
| 999 if (!homedir) | |
| 867 | 1000 newdir = (Ibyte *) ""; |
| 428 | 1001 else |
| 771 | 1002 newdir = homedir; |
| 428 | 1003 |
| 1004 nm++; | |
| 657 | 1005 #ifdef WIN32_FILENAMES |
| 428 | 1006 collapse_newdir = 0; |
| 1007 #endif | |
| 1008 } | |
| 1009 else /* ~user/filename */ | |
| 1010 { | |
| 1011 for (p = nm; *p && (!IS_DIRECTORY_SEP (*p)); p++) | |
| 1012 DO_NOTHING; | |
| 2367 | 1013 o = alloca_ibytes (p - nm + 1); |
| 771 | 1014 memcpy (o, nm, p - nm); |
| 428 | 1015 o [p - nm] = 0; |
| 1016 | |
| 558 | 1017 /* #### While NT is single-user (for the moment) you still |
| 1018 can have multiple user profiles users defined, each with | |
| 1019 its HOME. So maybe possibly we should think about handling | |
| 1020 ~user. --ben */ | |
| 1021 #ifndef WIN32_NATIVE | |
| 442 | 1022 #ifdef CYGWIN |
| 771 | 1023 { |
| 867 | 1024 Ibyte *user; |
| 771 | 1025 |
| 1026 if ((user = user_login_name (NULL)) != NULL) | |
| 1027 { | |
| 1028 /* Does the user login name match the ~name? */ | |
| 1029 if (qxestrcmp (user, o + 1) == 0) | |
| 1030 { | |
| 1031 newdir = get_home_directory (); | |
| 1032 nm = p; | |
| 1033 } | |
| 1034 } | |
| 1035 } | |
| 1036 if (!newdir) | |
| 428 | 1037 { |
| 442 | 1038 #endif /* CYGWIN */ |
| 428 | 1039 /* Jamie reports that getpwnam() can get wedged by SIGIO/SIGALARM |
| 1040 occurring in it. (It can call select()). */ | |
| 1041 slow_down_interrupts (); | |
| 771 | 1042 pw = (struct passwd *) qxe_getpwnam (o + 1); |
| 428 | 1043 speed_up_interrupts (); |
| 1044 if (pw) | |
| 1045 { | |
| 867 | 1046 newdir = (Ibyte *) pw->pw_dir; |
| 428 | 1047 nm = p; |
| 771 | 1048 /* FSF: if WIN32_NATIVE, collapse_newdir = 0; |
| 1049 not possible here. */ | |
| 428 | 1050 } |
| 442 | 1051 #ifdef CYGWIN |
| 428 | 1052 } |
| 1053 #endif | |
| 442 | 1054 #endif /* not WIN32_NATIVE */ |
| 428 | 1055 |
| 1056 /* If we don't find a user of that name, leave the name | |
| 1057 unchanged; don't move nm forward to p. */ | |
| 1058 } | |
| 1059 } | |
| 1060 | |
| 657 | 1061 #ifdef WIN32_FILENAMES |
| 428 | 1062 /* On DOS and Windows, nm is absolute if a drive name was specified; |
| 1063 use the drive's current directory as the prefix if needed. */ | |
| 1064 if (!newdir && drive) | |
| 1065 { | |
| 657 | 1066 #ifdef WIN32_NATIVE |
| 428 | 1067 /* Get default directory if needed to make nm absolute. */ |
| 1068 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1069 { | |
| 867 | 1070 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1071 if (newcwd) |
| 1072 { | |
| 867 | 1073 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
| 1726 | 1074 xfree (newcwd, Ibyte *); |
| 771 | 1075 } |
| 1076 else | |
| 428 | 1077 newdir = NULL; |
| 1078 } | |
| 657 | 1079 #endif /* WIN32_NATIVE */ |
| 428 | 1080 if (!newdir) |
| 1081 { | |
| 1082 /* Either nm starts with /, or drive isn't mounted. */ | |
| 2367 | 1083 newdir = alloca_ibytes (4); |
| 428 | 1084 newdir[0] = DRIVE_LETTER (drive); |
| 1085 newdir[1] = ':'; | |
| 1086 newdir[2] = '/'; | |
| 1087 newdir[3] = 0; | |
| 1088 } | |
| 1089 } | |
| 657 | 1090 #endif /* WIN32_FILENAMES */ |
| 428 | 1091 |
| 1092 /* Finally, if no prefix has been specified and nm is not absolute, | |
| 1093 then it must be expanded relative to default_directory. */ | |
| 1094 | |
| 1095 if (1 | |
| 442 | 1096 #ifndef WIN32_NATIVE |
| 428 | 1097 /* /... alone is not absolute on DOS and Windows. */ |
| 1098 && !IS_DIRECTORY_SEP (nm[0]) | |
| 657 | 1099 #endif |
| 1100 #ifdef WIN32_FILENAMES | |
| 428 | 1101 && !(IS_DIRECTORY_SEP (nm[0]) && IS_DIRECTORY_SEP (nm[1])) |
| 1102 #endif | |
| 1103 && !newdir) | |
| 1104 { | |
| 1105 newdir = XSTRING_DATA (default_directory); | |
| 771 | 1106 #ifdef WIN32_FILENAMES |
| 1107 /* Note if special escape prefix is present, but remove for now. */ | |
| 1108 if (newdir[0] == '/' && newdir[1] == ':') | |
| 1109 { | |
| 1110 is_escaped = 1; | |
| 1111 newdir += 2; | |
| 1112 } | |
| 1113 #endif | |
| 428 | 1114 } |
| 1115 | |
| 657 | 1116 #ifdef WIN32_FILENAMES |
| 428 | 1117 if (newdir) |
| 1118 { | |
| 1119 /* First ensure newdir is an absolute name. */ | |
| 1120 if ( | |
| 442 | 1121 /* Detect Windows file names with drive specifiers. */ |
| 428 | 1122 ! (IS_DRIVE (newdir[0]) |
| 1123 && IS_DEVICE_SEP (newdir[1]) && IS_DIRECTORY_SEP (newdir[2])) | |
| 1124 /* Detect Windows file names in UNC format. */ | |
| 1125 && ! (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 771 | 1126 /* XEmacs: added these two lines: Detect drive spec by itself */ |
| 428 | 1127 && ! (IS_DEVICE_SEP (newdir[1]) && newdir[2] == 0) |
| 657 | 1128 /* Detect unix format. */ |
| 1129 #ifndef WIN32_NATIVE | |
| 1130 && ! (IS_DIRECTORY_SEP (newdir[0])) | |
| 1131 #endif | |
| 428 | 1132 ) |
| 1133 { | |
| 1134 /* Effectively, let newdir be (expand-file-name newdir cwd). | |
| 1135 Because of the admonition against calling expand-file-name | |
| 1136 when we have pointers into lisp strings, we accomplish this | |
| 1137 indirectly by prepending newdir to nm if necessary, and using | |
| 1138 cwd (or the wd of newdir's drive) as the new newdir. */ | |
| 1139 | |
| 1140 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1141 { | |
| 1142 drive = newdir[0]; | |
| 1143 newdir += 2; | |
| 1144 } | |
| 1145 if (!IS_DIRECTORY_SEP (nm[0])) | |
| 1146 { | |
| 2367 | 1147 Ibyte *tmp = alloca_ibytes (qxestrlen (newdir) + |
| 1148 qxestrlen (nm) + 2); | |
| 771 | 1149 file_name_as_directory (tmp, newdir); |
| 1150 qxestrcat (tmp, nm); | |
| 428 | 1151 nm = tmp; |
| 1152 } | |
| 1153 if (drive) | |
| 1154 { | |
| 657 | 1155 #ifdef WIN32_NATIVE |
| 867 | 1156 Ibyte *newcwd = mswindows_getdcwd (toupper (drive) - 'A' + 1); |
| 771 | 1157 if (newcwd) |
| 1158 { | |
| 867 | 1159 IBYTE_STRING_TO_ALLOCA (newcwd, newdir); |
| 1726 | 1160 xfree (newcwd, Ibyte *); |
| 771 | 1161 } |
| 1162 else | |
| 657 | 1163 #endif |
| 867 | 1164 IBYTE_STRING_TO_ALLOCA ((Ibyte *) "/", newdir); |
| 428 | 1165 } |
| 1166 else | |
| 867 | 1167 IBYTE_STRING_TO_ALLOCA (get_initial_directory (0, 0), newdir); |
| 428 | 1168 } |
| 1169 | |
| 1170 /* Strip off drive name from prefix, if present. */ | |
| 1171 if (IS_DRIVE (newdir[0]) && newdir[1] == ':') | |
| 1172 { | |
| 1173 drive = newdir[0]; | |
| 1174 newdir += 2; | |
| 1175 } | |
| 1176 | |
| 1177 /* Keep only a prefix from newdir if nm starts with slash | |
| 771 | 1178 (//server/share for UNC, nothing otherwise). */ |
| 657 | 1179 if (IS_DIRECTORY_SEP (nm[0]) |
| 1180 #ifndef WIN32_NATIVE | |
| 1181 && IS_DIRECTORY_SEP (nm[1]) | |
| 1182 #endif | |
| 1183 && collapse_newdir) | |
| 428 | 1184 { |
| 1185 if (IS_DIRECTORY_SEP (newdir[0]) && IS_DIRECTORY_SEP (newdir[1])) | |
| 1186 { | |
| 2367 | 1187 /* !!#### Use ei API */ |
| 1188 newdir = qxestrcpy (alloca_ibytes (qxestrlen (newdir) + 1), | |
| 1189 newdir); | |
| 428 | 1190 p = newdir + 2; |
| 1191 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1192 p++; | |
| 1193 while (*p && !IS_DIRECTORY_SEP (*p)) p++; | |
| 1194 *p = 0; | |
| 1195 } | |
| 1196 else | |
| 867 | 1197 newdir = (Ibyte *) ""; |
| 428 | 1198 } |
| 1199 } | |
| 657 | 1200 #endif /* WIN32_FILENAMES */ |
| 428 | 1201 |
| 1202 if (newdir) | |
| 1203 { | |
| 1204 /* Get rid of any slash at the end of newdir, unless newdir is | |
| 771 | 1205 just / or // (an incomplete UNC name). */ |
| 1206 length = qxestrlen (newdir); | |
| 428 | 1207 if (length > 1 && IS_DIRECTORY_SEP (newdir[length - 1]) |
| 657 | 1208 #ifdef WIN32_FILENAMES |
| 428 | 1209 && !(length == 2 && IS_DIRECTORY_SEP (newdir[0])) |
| 1210 #endif | |
| 1211 ) | |
| 1212 { | |
| 2367 | 1213 Ibyte *temp = alloca_ibytes (length); |
| 428 | 1214 memcpy (temp, newdir, length - 1); |
| 1215 temp[length - 1] = 0; | |
| 1216 newdir = temp; | |
| 1217 } | |
| 1218 tlen = length + 1; | |
| 1219 } | |
| 1220 else | |
| 1221 tlen = 0; | |
| 1222 | |
| 1223 /* Now concatenate the directory and name to new space in the stack frame */ | |
| 771 | 1224 tlen += qxestrlen (nm) + 1; |
| 657 | 1225 #ifdef WIN32_FILENAMES |
| 771 | 1226 /* Reserve space for drive specifier and escape prefix, since either |
| 1227 or both may need to be inserted. (The Microsoft x86 compiler | |
| 428 | 1228 produces incorrect code if the following two lines are combined.) */ |
| 2367 | 1229 target = alloca_ibytes (tlen + 4); |
| 771 | 1230 target += 4; |
| 657 | 1231 #else /* not WIN32_FILENAMES */ |
| 2367 | 1232 target = alloca_ibytes (tlen); |
| 657 | 1233 #endif /* not WIN32_FILENAMES */ |
| 428 | 1234 *target = 0; |
| 1235 | |
| 1236 if (newdir) | |
| 1237 { | |
| 1238 if (nm[0] == 0 || IS_DIRECTORY_SEP (nm[0])) | |
| 771 | 1239 { |
| 1240 #ifdef WIN32_FILENAMES | |
| 1241 /* If newdir is effectively "C:/", then the drive letter will have | |
| 1242 been stripped and newdir will be "/". Concatenating with an | |
| 1243 absolute directory in nm produces "//", which will then be | |
| 1244 incorrectly treated as a network share. Ignore newdir in | |
| 1245 this case (keeping the drive letter). */ | |
| 1246 if (!(drive && nm[0] && IS_DIRECTORY_SEP (newdir[0]) | |
| 1247 && newdir[1] == '\0')) | |
| 1248 #endif | |
| 1249 qxestrcpy (target, newdir); | |
| 1250 } | |
| 428 | 1251 else |
| 771 | 1252 file_name_as_directory (target, newdir); |
| 428 | 1253 } |
| 1254 | |
| 771 | 1255 qxestrcat (target, nm); |
| 428 | 1256 |
| 1257 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */ | |
| 1258 | |
| 771 | 1259 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they |
| 1260 appear. */ | |
| 428 | 1261 |
| 1262 p = target; | |
| 1263 o = target; | |
| 1264 | |
| 1265 while (*p) | |
| 1266 { | |
| 1267 if (!IS_DIRECTORY_SEP (*p)) | |
| 1268 { | |
| 1269 *o++ = *p++; | |
| 1270 } | |
| 1271 else if (IS_DIRECTORY_SEP (p[0]) | |
| 1272 && p[1] == '.' | |
| 1273 && (IS_DIRECTORY_SEP (p[2]) | |
| 1274 || p[2] == 0)) | |
| 1275 { | |
| 1276 /* If "/." is the entire filename, keep the "/". Otherwise, | |
| 1277 just delete the whole "/.". */ | |
| 1278 if (o == target && p[2] == '\0') | |
| 1279 *o++ = *p; | |
| 1280 p += 2; | |
| 1281 } | |
| 1282 else if (IS_DIRECTORY_SEP (p[0]) && p[1] == '.' && p[2] == '.' | |
| 1283 /* `/../' is the "superroot" on certain file systems. */ | |
| 1284 && o != target | |
| 1285 && (IS_DIRECTORY_SEP (p[3]) || p[3] == 0)) | |
| 1286 { | |
| 1287 while (o != target && (--o) && !IS_DIRECTORY_SEP (*o)) | |
| 1288 ; | |
| 1289 /* Keep initial / only if this is the whole name. */ | |
| 1290 if (o == target && IS_ANY_SEP (*o) && p[3] == 0) | |
| 1291 ++o; | |
| 1292 p += 3; | |
| 1293 } | |
| 771 | 1294 else if (p > target |
| 1295 && IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1296 { | |
| 1297 /* Collapse multiple `/' in a row. */ | |
| 1298 *o++ = *p++; | |
| 1299 while (IS_DIRECTORY_SEP (*p)) | |
| 1300 ++p; | |
| 1301 } | |
| 428 | 1302 else |
| 1303 { | |
| 1304 *o++ = *p++; | |
| 1305 } | |
| 1306 } | |
| 1307 | |
| 657 | 1308 #ifdef WIN32_FILENAMES |
| 428 | 1309 /* At last, set drive name, except for network file name. */ |
| 1310 if (drive) | |
| 1311 { | |
| 1312 target -= 2; | |
| 1313 target[0] = DRIVE_LETTER (drive); | |
| 1314 target[1] = ':'; | |
| 1315 } | |
| 657 | 1316 #ifdef WIN32_NATIVE |
| 428 | 1317 else |
| 1318 { | |
| 1319 assert (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1])); | |
| 1320 } | |
| 657 | 1321 #endif |
| 771 | 1322 /* Reinsert the escape prefix if required. */ |
| 1323 if (is_escaped) | |
| 1324 { | |
| 1325 target -= 2; | |
| 1326 target[0] = '/'; | |
| 1327 target[1] = ':'; | |
| 1328 } | |
| 1329 | |
| 1330 *o = '\0'; | |
| 1331 | |
| 1332 { | |
| 867 | 1333 Ibyte *newtarget = mswindows_canonicalize_filename (target); |
| 771 | 1334 Lisp_Object result = build_intstring (newtarget); |
| 1726 | 1335 xfree (newtarget, Ibyte *); |
| 771 | 1336 |
| 2526 | 1337 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, result); |
| 771 | 1338 } |
| 1339 #else /* not WIN32_FILENAMES */ | |
| 2526 | 1340 RETURN_UNGCPRO_EXIT_PROFILING (QSin_expand_file_name, |
| 1341 make_string (target, o - target)); | |
| 771 | 1342 #endif /* not WIN32_FILENAMES */ |
| 428 | 1343 } |
| 1344 | |
| 1345 DEFUN ("file-truename", Ffile_truename, 1, 2, 0, /* | |
| 444 | 1346 Return the canonical name of FILENAME. |
| 1347 Second arg DEFAULT is directory to start with if FILENAME is relative | |
| 428 | 1348 (does not start with slash); if DEFAULT is nil or missing, |
| 444 | 1349 the current buffer's value of `default-directory' is used. |
| 428 | 1350 No component of the resulting pathname will be a symbolic link, as |
| 1351 in the realpath() function. | |
| 1352 */ | |
| 1353 (filename, default_)) | |
| 1354 { | |
| 442 | 1355 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 428 | 1356 Lisp_Object expanded_name; |
| 1357 struct gcpro gcpro1; | |
| 1358 | |
| 1359 CHECK_STRING (filename); | |
| 1360 | |
| 1361 expanded_name = Fexpand_file_name (filename, default_); | |
| 1362 | |
| 1363 if (!STRINGP (expanded_name)) | |
| 1364 return Qnil; | |
| 1365 | |
| 1366 GCPRO1 (expanded_name); | |
| 442 | 1367 |
| 1368 { | |
| 1369 Lisp_Object handler = | |
| 1370 Ffind_file_name_handler (expanded_name, Qfile_truename); | |
| 1371 | |
| 1372 if (!NILP (handler)) | |
| 1373 RETURN_UNGCPRO | |
| 1374 (call2_check_string (handler, Qfile_truename, expanded_name)); | |
| 1375 } | |
| 428 | 1376 |
| 1377 { | |
| 2421 | 1378 Ibyte resolved_path[PATH_MAX_INTERNAL]; |
| 771 | 1379 Bytecount elen = XSTRING_LENGTH (expanded_name); |
| 867 | 1380 Ibyte *path; |
| 1381 Ibyte *p; | |
| 771 | 1382 |
| 1383 LISP_STRING_TO_ALLOCA (expanded_name, path); | |
| 988 | 1384 |
| 1111 | 1385 #if defined (WIN32_FILENAMES) && defined (CYGWIN) |
| 988 | 1386 /* When using win32 filenames in cygwin we want file-truename to |
| 1387 detect that c:/windows == /windows for example. */ | |
| 1111 | 1388 if (! (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))) |
| 1389 { | |
| 1390 LOCAL_TO_WIN32_FILE_FORMAT (path, p); | |
| 1391 path = p; | |
| 1392 } | |
| 988 | 1393 #endif |
| 428 | 1394 p = path; |
| 442 | 1395 |
| 428 | 1396 /* Try doing it all at once. */ |
| 2526 | 1397 if (!qxe_realpath (path, resolved_path, 0)) |
| 428 | 1398 { |
| 1399 /* Didn't resolve it -- have to do it one component at a time. */ | |
| 1400 /* "realpath" is a typically useless, stupid un*x piece of crap. | |
| 1401 It claims to return a useful value in the "error" case, but since | |
| 1402 there is no indication provided of how far along the pathname | |
| 1403 the function went before erring, there is no way to use the | |
| 442 | 1404 partial result returned. What a piece of junk. |
| 1405 | |
| 1406 The above comment refers to historical versions of | |
| 1407 realpath(). The Unix98 specs state: | |
| 1408 | |
| 1409 "On successful completion, realpath() returns a | |
| 1410 pointer to the resolved name. Otherwise, realpath() | |
| 1411 returns a null pointer and sets errno to indicate the | |
| 1412 error, and the contents of the buffer pointed to by | |
| 1413 resolved_name are undefined." | |
| 1414 | |
| 771 | 1415 Since we depend on undocumented semantics of various system |
| 2526 | 1416 realpath()s, we just use our own version in realpath.c. |
| 1417 | |
| 1418 Note also that our own version differs in its semantics from any | |
| 1419 standard version, since it accepts and returns internal-format | |
| 1420 text, not external-format. */ | |
| 428 | 1421 for (;;) |
| 1422 { | |
| 867 | 1423 Ibyte *pos; |
| 446 | 1424 |
| 657 | 1425 #ifdef WIN32_FILENAMES |
| 446 | 1426 if (IS_DRIVE (p[0]) && IS_DEVICE_SEP (p[1]) |
| 1427 && IS_DIRECTORY_SEP (p[2])) | |
| 1428 /* don't test c: on windows */ | |
| 1429 p = p+2; | |
| 1430 else if (IS_DIRECTORY_SEP (p[0]) && IS_DIRECTORY_SEP (p[1])) | |
| 1431 /* start after // */ | |
| 1432 p = p+1; | |
| 1433 #endif | |
| 1434 for (pos = p + 1; pos < path + elen; pos++) | |
| 1435 if (IS_DIRECTORY_SEP (*pos)) | |
| 1436 { | |
| 1437 *(p = pos) = 0; | |
| 1438 break; | |
| 1439 } | |
| 1440 if (p != pos) | |
| 1441 p = 0; | |
| 428 | 1442 |
| 2526 | 1443 if (qxe_realpath (path, resolved_path, 0)) |
| 428 | 1444 { |
| 1445 if (p) | |
| 446 | 1446 *p = DIRECTORY_SEP; |
| 428 | 1447 else |
| 1448 break; | |
| 1449 | |
| 1450 } | |
| 1451 else if (errno == ENOENT || errno == EACCES) | |
| 1452 { | |
| 1453 /* Failed on this component. Just tack on the rest of | |
| 1454 the string and we are done. */ | |
| 771 | 1455 int rlen = qxestrlen (resolved_path); |
| 428 | 1456 |
| 1457 /* "On failure, it returns NULL, sets errno to indicate | |
| 1458 the error, and places in resolved_path the absolute pathname | |
| 1459 of the path component which could not be resolved." */ | |
| 442 | 1460 |
| 1461 if (p) | |
| 428 | 1462 { |
| 1463 int plen = elen - (p - path); | |
| 1464 | |
| 446 | 1465 if (rlen > 1 && IS_DIRECTORY_SEP (resolved_path[rlen - 1])) |
| 428 | 1466 rlen = rlen - 1; |
| 1467 | |
| 1468 if (plen + rlen + 1 > countof (resolved_path)) | |
| 1469 goto toolong; | |
| 1470 | |
| 446 | 1471 resolved_path[rlen] = DIRECTORY_SEP; |
| 428 | 1472 memcpy (resolved_path + rlen + 1, p + 1, plen + 1 - 1); |
| 1473 } | |
| 1474 break; | |
| 1475 } | |
| 1476 else | |
| 1477 goto lose; | |
| 1478 } | |
| 1479 } | |
| 1480 | |
| 1481 { | |
| 442 | 1482 Lisp_Object resolved_name; |
| 771 | 1483 int rlen = qxestrlen (resolved_path); |
| 826 | 1484 if (elen > 0 && IS_DIRECTORY_SEP (string_byte (expanded_name, elen - 1)) |
| 446 | 1485 && !(rlen > 0 && IS_DIRECTORY_SEP (resolved_path[rlen - 1]))) |
| 428 | 1486 { |
| 1487 if (rlen + 1 > countof (resolved_path)) | |
| 1488 goto toolong; | |
| 446 | 1489 resolved_path[rlen++] = DIRECTORY_SEP; |
| 442 | 1490 resolved_path[rlen] = '\0'; |
| 428 | 1491 } |
| 771 | 1492 resolved_name = make_string (resolved_path, rlen); |
| 442 | 1493 RETURN_UNGCPRO (resolved_name); |
| 428 | 1494 } |
| 1495 | |
| 1496 toolong: | |
| 1497 errno = ENAMETOOLONG; | |
| 1498 goto lose; | |
| 1499 lose: | |
| 563 | 1500 report_file_error ("Finding truename", expanded_name); |
| 428 | 1501 } |
| 442 | 1502 RETURN_UNGCPRO (Qnil); |
| 428 | 1503 } |
| 1504 | |
| 1505 | |
| 1506 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, 1, 1, 0, /* | |
| 1507 Substitute environment variables referred to in FILENAME. | |
| 1508 `$FOO' where FOO is an environment variable name means to substitute | |
| 1509 the value of that variable. The variable name should be terminated | |
| 444 | 1510 with a character, not a letter, digit or underscore; otherwise, enclose |
| 428 | 1511 the entire variable name in braces. |
| 1512 If `/~' appears, all of FILENAME through that `/' is discarded. | |
| 1513 */ | |
| 444 | 1514 (filename)) |
| 428 | 1515 { |
| 442 | 1516 /* This function can GC. GC checked 2000-07-28 ben. */ |
| 867 | 1517 Ibyte *nm; |
| 1518 | |
|
4324
5e526366d533
Don't error on unknown environment variables, #'substitute-in-file-name.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4266
diff
changeset
|
1519 Ibyte *s, *p, *o, *x, *endp, *got; |
| 867 | 1520 Ibyte *target = 0; |
| 428 | 1521 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
|
1522 int substituted = 0, seen_braces; |
| 867 | 1523 Ibyte *xnm; |
| 428 | 1524 Lisp_Object handler; |
| 1525 | |
| 444 | 1526 CHECK_STRING (filename); |
| 428 | 1527 |
| 1528 /* If the file name has special constructs in it, | |
| 1529 call the corresponding file handler. */ | |
| 444 | 1530 handler = Ffind_file_name_handler (filename, Qsubstitute_in_file_name); |
| 428 | 1531 if (!NILP (handler)) |
| 1532 return call2_check_string_or_nil (handler, Qsubstitute_in_file_name, | |
| 444 | 1533 filename); |
| 1534 | |
| 1535 nm = XSTRING_DATA (filename); | |
| 1536 endp = nm + XSTRING_LENGTH (filename); | |
| 428 | 1537 |
| 1538 /* If /~ or // appears, discard everything through first slash. */ | |
| 1539 | |
| 1540 for (p = nm; p != endp; p++) | |
| 1541 { | |
| 1542 if ((p[0] == '~' | |
| 657 | 1543 #if defined (WIN32_FILENAMES) |
| 440 | 1544 /* // at start of file name is meaningful in WindowsNT systems */ |
| 428 | 1545 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != nm) |
| 657 | 1546 #else /* not (WIN32_FILENAMES) */ |
| 428 | 1547 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1548 #endif /* not (WIN32_FILENAMES) */ |
| 428 | 1549 ) |
| 1550 && p != nm | |
| 1551 && (IS_DIRECTORY_SEP (p[-1]))) | |
| 1552 { | |
| 1553 nm = p; | |
| 1554 substituted = 1; | |
| 1555 } | |
| 657 | 1556 #ifdef WIN32_FILENAMES |
| 428 | 1557 /* see comment in expand-file-name about drive specifiers */ |
| 1558 else if (IS_DRIVE (p[0]) && p[1] == ':' | |
| 1559 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1560 { | |
| 1561 nm = p; | |
| 1562 substituted = 1; | |
| 1563 } | |
| 657 | 1564 #endif /* WIN32_FILENAMES */ |
| 428 | 1565 } |
| 1566 | |
| 1567 /* See if any variables are substituted into the string | |
| 1568 and find the total length of their values in `total' */ | |
| 1569 | |
| 1570 for (p = nm; p != endp;) | |
| 1571 if (*p != '$') | |
| 1572 p++; | |
| 1573 else | |
| 1574 { | |
| 1575 p++; | |
| 1576 if (p == endp) | |
|
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1577 { |
|
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1578 /* No substitution, no error. */ |
|
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1579 break; |
|
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|
1580 } |
| 428 | 1581 else if (*p == '$') |
| 1582 { | |
| 1583 /* "$$" means a single "$" */ | |
| 1584 p++; | |
| 1585 total -= 1; | |
| 1586 substituted = 1; | |
| 1587 continue; | |
| 1588 } | |
| 1589 else if (*p == '{') | |
| 1590 { | |
| 1591 o = ++p; | |
| 1592 while (p != endp && *p != '}') p++; | |
|
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1593 if (*p != '}') |
|
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1594 { |
|
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1595 /* No substitution, no error. Keep looking. */ |
|
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1596 p = o; |
|
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1597 continue; |
|
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1598 } |
| 428 | 1599 s = p; |
| 1600 } | |
| 1601 else | |
| 1602 { | |
| 1603 o = p; | |
| 1604 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1605 s = p; | |
| 1606 } | |
| 1607 | |
| 1608 /* Copy out the variable name */ | |
| 2367 | 1609 target = alloca_ibytes (s - o + 1); |
| 771 | 1610 qxestrncpy (target, o, s - o); |
| 428 | 1611 target[s - o] = 0; |
| 442 | 1612 #ifdef WIN32_NATIVE |
| 1204 | 1613 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1614 #endif /* WIN32_NATIVE */ |
| 428 | 1615 |
| 1616 /* Get variable value */ | |
|
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1617 got = egetenv ((CIbyte *) target); |
|
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1618 if (got) |
|
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1619 { |
|
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1620 total += qxestrlen (got); |
|
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1621 substituted = 1; |
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1622 } |
| 428 | 1623 } |
| 1624 | |
| 1625 if (!substituted) | |
| 444 | 1626 return filename; |
| 1627 | |
| 1628 /* If substitution required, recopy the filename and do it */ | |
| 428 | 1629 /* Make space in stack frame for the new copy */ |
| 2367 | 1630 xnm = alloca_ibytes (XSTRING_LENGTH (filename) + total + 1); |
| 428 | 1631 x = xnm; |
| 1632 | |
| 1633 /* Copy the rest of the name through, replacing $ constructs with values */ | |
| 1634 for (p = nm; *p;) | |
| 1635 if (*p != '$') | |
| 1636 *x++ = *p++; | |
| 1637 else | |
| 1638 { | |
| 1639 p++; | |
|
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1640 seen_braces = 0; |
| 428 | 1641 if (p == endp) |
|
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1642 { |
|
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1643 *x++ = '$'; |
|
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1644 break; |
|
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|
1645 } |
| 428 | 1646 else if (*p == '$') |
| 1647 { | |
| 1648 *x++ = *p++; | |
| 1649 continue; | |
| 1650 } | |
| 1651 else if (*p == '{') | |
| 1652 { | |
|
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1653 seen_braces = 1; |
| 428 | 1654 o = ++p; |
| 1655 while (p != endp && *p != '}') p++; | |
|
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1656 if (*p != '}') |
|
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1657 { |
|
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1658 /* Don't syntax error, don't substitute */ |
|
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1659 *x++ = '{'; |
|
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1660 p = o; |
|
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1661 continue; |
|
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1662 } |
| 428 | 1663 s = p++; |
| 1664 } | |
| 1665 else | |
| 1666 { | |
| 1667 o = p; | |
| 1668 while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
| 1669 s = p; | |
| 1670 } | |
| 1671 | |
| 1672 /* Copy out the variable name */ | |
| 2367 | 1673 target = alloca_ibytes (s - o + 1); |
| 771 | 1674 qxestrncpy (target, o, s - o); |
| 428 | 1675 target[s - o] = 0; |
| 442 | 1676 #ifdef WIN32_NATIVE |
| 1204 | 1677 qxestrupr (target); /* $home == $HOME etc. */ |
| 442 | 1678 #endif /* WIN32_NATIVE */ |
| 428 | 1679 |
| 1680 /* Get variable value */ | |
|
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1681 got = egetenv ((CIbyte *) target); |
|
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1682 if (got) |
|
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1683 { |
|
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1684 qxestrcpy (x, got); |
|
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1685 x += qxestrlen (got); |
|
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1686 } |
|
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1687 else |
|
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1688 { |
|
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1689 *x++ = '$'; |
|
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1690 if (seen_braces) |
|
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1691 { |
|
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1692 *x++ = '{'; |
|
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1693 /* Preserve the original case. */ |
|
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1694 qxestrncpy (x, o, s - o); |
|
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1695 x += s - o; |
|
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1696 *x++ = '}'; |
|
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1697 } |
|
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1698 else |
|
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|
1699 { |
|
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1700 /* Preserve the original case. */ |
|
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1701 qxestrncpy (x, o, s - o); |
|
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|
1702 x += s - o; |
|
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1703 } |
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|
1704 } |
| 428 | 1705 } |
| 1706 | |
| 1707 *x = 0; | |
| 1708 | |
| 1709 /* If /~ or // appears, discard everything through first slash. */ | |
| 1710 | |
| 1711 for (p = xnm; p != x; p++) | |
| 1712 if ((p[0] == '~' | |
| 657 | 1713 #if defined (WIN32_FILENAMES) |
| 428 | 1714 || (IS_DIRECTORY_SEP (p[0]) && p - 1 != xnm) |
| 657 | 1715 #else /* not WIN32_FILENAMES */ |
| 428 | 1716 || IS_DIRECTORY_SEP (p[0]) |
| 657 | 1717 #endif /* not WIN32_FILENAMES */ |
| 428 | 1718 ) |
| 1719 /* don't do p[-1] if that would go off the beginning --jwz */ | |
| 1720 && p != nm && p > xnm && IS_DIRECTORY_SEP (p[-1])) | |
| 1721 xnm = p; | |
| 657 | 1722 #ifdef WIN32_FILENAMES |
| 428 | 1723 else if (IS_DRIVE (p[0]) && p[1] == ':' |
| 1724 && p > nm && IS_DIRECTORY_SEP (p[-1])) | |
| 1725 xnm = p; | |
| 1726 #endif | |
| 1727 | |
| 1728 return make_string (xnm, x - xnm); | |
| 1729 } | |
| 1730 | |
| 1731 /* A slightly faster and more convenient way to get | |
| 1732 (directory-file-name (expand-file-name FOO)). */ | |
| 1733 | |
| 1734 Lisp_Object | |
| 1735 expand_and_dir_to_file (Lisp_Object filename, Lisp_Object defdir) | |
| 1736 { | |
| 442 | 1737 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1738 Lisp_Object abspath; |
| 1739 struct gcpro gcpro1; | |
| 1740 | |
| 1741 abspath = Fexpand_file_name (filename, defdir); | |
| 1742 GCPRO1 (abspath); | |
| 1743 /* Remove final slash, if any (unless path is root). | |
| 1744 stat behaves differently depending! */ | |
| 1745 if (XSTRING_LENGTH (abspath) > 1 | |
| 826 | 1746 && IS_DIRECTORY_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 1)) |
| 1747 && !IS_DEVICE_SEP (string_byte (abspath, XSTRING_LENGTH (abspath) - 2))) | |
| 428 | 1748 /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1749 abspath = Fdirectory_file_name (abspath); | |
| 1750 UNGCPRO; | |
| 1751 return abspath; | |
| 1752 } | |
| 1753 | |
| 1754 /* Signal an error if the file ABSNAME already exists. | |
| 1755 If INTERACTIVE is nonzero, ask the user whether to proceed, | |
| 1756 and bypass the error if the user says to go ahead. | |
| 1757 QUERYSTRING is a name for the action that is being considered | |
| 1758 to alter the file. | |
| 1759 *STATPTR is used to store the stat information if the file exists. | |
| 1760 If the file does not exist, STATPTR->st_mode is set to 0. */ | |
| 1761 | |
| 1762 static void | |
| 1333 | 1763 barf_or_query_if_file_exists (Lisp_Object absname, const CIbyte *querystring, |
| 428 | 1764 int interactive, struct stat *statptr) |
| 1765 { | |
| 442 | 1766 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1767 struct stat statbuf; |
| 1768 | |
| 1769 /* stat is a good way to tell whether the file exists, | |
| 1770 regardless of what access permissions it has. */ | |
| 771 | 1771 if (qxe_stat (XSTRING_DATA (absname), &statbuf) >= 0) |
| 428 | 1772 { |
| 1773 Lisp_Object tem; | |
| 1774 | |
| 1775 if (interactive) | |
| 1776 { | |
| 1777 Lisp_Object prompt; | |
| 1778 struct gcpro gcpro1; | |
| 1779 | |
| 771 | 1780 prompt = |
| 1781 emacs_sprintf_string | |
| 1782 (CGETTEXT ("File %s already exists; %s anyway? "), | |
| 1783 XSTRING_DATA (absname), CGETTEXT (querystring)); | |
| 428 | 1784 |
| 1785 GCPRO1 (prompt); | |
| 1786 tem = call1 (Qyes_or_no_p, prompt); | |
| 1787 UNGCPRO; | |
| 1788 } | |
| 1789 else | |
| 1790 tem = Qnil; | |
| 1791 | |
| 1792 if (NILP (tem)) | |
| 1793 Fsignal (Qfile_already_exists, | |
| 771 | 1794 list2 (build_msg_string ("File already exists"), |
| 428 | 1795 absname)); |
| 1796 if (statptr) | |
| 1797 *statptr = statbuf; | |
| 1798 } | |
| 1799 else | |
| 1800 { | |
| 1801 if (statptr) | |
| 1802 statptr->st_mode = 0; | |
| 1803 } | |
| 1804 return; | |
| 1805 } | |
| 1806 | |
| 1807 DEFUN ("copy-file", Fcopy_file, 2, 4, | |
| 1808 "fCopy file: \nFCopy %s to file: \np\nP", /* | |
| 444 | 1809 Copy FILENAME to NEWNAME. Both args must be strings. |
| 428 | 1810 Signals a `file-already-exists' error if file NEWNAME already exists, |
| 1811 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil. | |
| 1812 A number as third arg means request confirmation if NEWNAME already exists. | |
| 1813 This is what happens in interactive use with M-x. | |
| 1814 Fourth arg KEEP-TIME non-nil means give the new file the same | |
| 1815 last-modified time as the old one. (This works on only some systems.) | |
| 1816 A prefix arg makes KEEP-TIME non-nil. | |
| 1817 */ | |
| 1818 (filename, newname, ok_if_already_exists, keep_time)) | |
| 1819 { | |
| 442 | 1820 /* This function can call Lisp. GC checked 2000-07-28 ben */ |
| 428 | 1821 int ifd, ofd, n; |
| 1822 char buf[16 * 1024]; | |
| 1823 struct stat st, out_st; | |
| 1824 Lisp_Object handler; | |
| 1825 int speccount = specpdl_depth (); | |
| 1826 struct gcpro gcpro1, gcpro2; | |
| 1827 /* Lisp_Object args[6]; */ | |
| 1828 int input_file_statable_p; | |
| 1829 | |
| 1830 GCPRO2 (filename, newname); | |
| 1831 CHECK_STRING (filename); | |
| 1832 CHECK_STRING (newname); | |
| 1833 filename = Fexpand_file_name (filename, Qnil); | |
| 1834 newname = Fexpand_file_name (newname, Qnil); | |
| 1835 | |
| 1836 /* If the input file name has special constructs in it, | |
| 1837 call the corresponding file handler. */ | |
| 1838 handler = Ffind_file_name_handler (filename, Qcopy_file); | |
| 1839 /* Likewise for output file name. */ | |
| 1840 if (NILP (handler)) | |
| 1841 handler = Ffind_file_name_handler (newname, Qcopy_file); | |
| 1842 if (!NILP (handler)) | |
| 1843 { | |
| 1844 UNGCPRO; | |
| 1845 return call5 (handler, Qcopy_file, filename, newname, | |
| 1846 ok_if_already_exists, keep_time); | |
| 1847 } | |
| 1848 | |
| 1849 /* When second argument is a directory, copy the file into it. | |
| 1850 (copy-file "foo" "bar/") == (copy-file "foo" "bar/foo") | |
| 1851 */ | |
| 1852 if (!NILP (Ffile_directory_p (newname))) | |
| 1853 { | |
| 1854 Lisp_Object args[3]; | |
| 1855 struct gcpro ngcpro1; | |
| 1856 int i = 1; | |
| 1857 | |
| 1858 args[0] = newname; | |
| 1859 args[1] = Qnil; args[2] = Qnil; | |
| 1860 NGCPRO1 (*args); | |
| 1861 ngcpro1.nvars = 3; | |
| 826 | 1862 if (!IS_DIRECTORY_SEP (string_byte (newname, |
| 442 | 1863 XSTRING_LENGTH (newname) - 1))) |
| 1864 | |
| 1865 args[i++] = Fchar_to_string (Vdirectory_sep_char); | |
| 428 | 1866 args[i++] = Ffile_name_nondirectory (filename); |
| 1867 newname = Fconcat (i, args); | |
| 1868 NUNGCPRO; | |
| 1869 } | |
| 1870 | |
| 1871 if (NILP (ok_if_already_exists) | |
| 1872 || INTP (ok_if_already_exists)) | |
| 1873 barf_or_query_if_file_exists (newname, "copy to it", | |
| 1874 INTP (ok_if_already_exists), &out_st); | |
| 771 | 1875 else if (qxe_stat (XSTRING_DATA (newname), &out_st) < 0) |
| 428 | 1876 out_st.st_mode = 0; |
| 1877 | |
| 771 | 1878 ifd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 1879 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 1880 if (ifd < 0) |
| 563 | 1881 report_file_error ("Opening input file", filename); |
| 428 | 1882 |
| 1883 record_unwind_protect (close_file_unwind, make_int (ifd)); | |
| 1884 | |
| 1885 /* We can only copy regular files and symbolic links. Other files are not | |
| 1886 copyable by us. */ | |
| 771 | 1887 input_file_statable_p = (qxe_fstat (ifd, &st) >= 0); |
| 428 | 1888 |
| 442 | 1889 #ifndef WIN32_NATIVE |
| 428 | 1890 if (out_st.st_mode != 0 |
| 1891 && st.st_dev == out_st.st_dev && st.st_ino == out_st.st_ino) | |
| 1892 { | |
| 1893 errno = 0; | |
| 1894 report_file_error ("Input and output files are the same", | |
| 563 | 1895 list3 (Qunbound, filename, newname)); |
| 428 | 1896 } |
| 1897 #endif | |
| 1898 | |
| 1899 #if defined (S_ISREG) && defined (S_ISLNK) | |
| 1900 if (input_file_statable_p) | |
| 1901 { | |
| 1902 if (!(S_ISREG (st.st_mode)) | |
| 1903 /* XEmacs: have to allow S_ISCHR in order to copy /dev/null */ | |
| 1904 #ifdef S_ISCHR | |
| 1905 && !(S_ISCHR (st.st_mode)) | |
| 1906 #endif | |
| 1907 && !(S_ISLNK (st.st_mode))) | |
| 1908 { | |
| 1909 #if defined (EISDIR) | |
| 1910 /* Get a better looking error message. */ | |
| 1911 errno = EISDIR; | |
| 1912 #endif /* EISDIR */ | |
| 563 | 1913 report_file_error ("Non-regular file", filename); |
| 428 | 1914 } |
| 1915 } | |
| 1916 #endif /* S_ISREG && S_ISLNK */ | |
| 1917 | |
| 771 | 1918 ofd = qxe_open (XSTRING_DATA (newname), |
| 1919 O_WRONLY | O_CREAT | O_TRUNC | OPEN_BINARY, CREAT_MODE); | |
| 428 | 1920 if (ofd < 0) |
| 563 | 1921 report_file_error ("Opening output file", newname); |
| 428 | 1922 |
| 1923 { | |
| 1924 Lisp_Object ofd_locative = noseeum_cons (make_int (ofd), Qnil); | |
| 1925 | |
| 1926 record_unwind_protect (close_file_unwind, ofd_locative); | |
| 1927 | |
| 1928 while ((n = read_allowing_quit (ifd, buf, sizeof (buf))) > 0) | |
| 1929 { | |
| 1930 if (write_allowing_quit (ofd, buf, n) != n) | |
| 563 | 1931 report_file_error ("I/O error", newname); |
| 428 | 1932 } |
| 1933 | |
| 1934 /* Closing the output clobbers the file times on some systems. */ | |
| 771 | 1935 if (retry_close (ofd) < 0) |
| 563 | 1936 report_file_error ("I/O error", newname); |
| 428 | 1937 |
| 1938 if (input_file_statable_p) | |
| 1939 { | |
| 442 | 1940 if (!NILP (keep_time)) |
| 1941 { | |
| 1942 EMACS_TIME atime, mtime; | |
| 1943 EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
| 1944 EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
| 592 | 1945 if (set_file_times (newname, atime, mtime)) |
| 1946 report_file_error ("I/O error", list1 (newname)); | |
| 442 | 1947 } |
| 771 | 1948 qxe_chmod (XSTRING_DATA (newname), st.st_mode & 07777); |
| 428 | 1949 } |
| 1950 | |
| 1951 /* We'll close it by hand */ | |
| 1952 XCAR (ofd_locative) = Qnil; | |
| 1953 | |
| 1954 /* Close ifd */ | |
| 771 | 1955 unbind_to (speccount); |
| 428 | 1956 } |
| 1957 | |
| 1958 UNGCPRO; | |
| 1959 return Qnil; | |
| 1960 } | |
| 1961 | |
| 1962 DEFUN ("make-directory-internal", Fmake_directory_internal, 1, 1, 0, /* | |
| 1963 Create a directory. One argument, a file name string. | |
| 1964 */ | |
| 1965 (dirname_)) | |
| 1966 { | |
| 1967 /* This function can GC. GC checked 1997.04.06. */ | |
| 1968 Lisp_Object handler; | |
| 1969 struct gcpro gcpro1; | |
| 771 | 1970 DECLARE_EISTRING (dir); |
| 428 | 1971 |
| 1972 CHECK_STRING (dirname_); | |
| 1973 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 1974 | |
| 1975 GCPRO1 (dirname_); | |
| 1976 handler = Ffind_file_name_handler (dirname_, Qmake_directory_internal); | |
| 1977 UNGCPRO; | |
| 1978 if (!NILP (handler)) | |
| 1979 return (call2 (handler, Qmake_directory_internal, dirname_)); | |
| 1980 | |
| 771 | 1981 eicpy_lstr (dir, dirname_); |
| 1982 if (eigetch_char (dir, eicharlen (dir) - 1) == '/') | |
| 1983 eidel (dir, eilen (dir) - 1, -1, 1, -1); | |
| 1984 | |
| 1985 if (qxe_mkdir (eidata (dir), 0777) != 0) | |
| 563 | 1986 report_file_error ("Creating directory", dirname_); |
| 428 | 1987 |
| 1988 return Qnil; | |
| 1989 } | |
| 1990 | |
| 1991 DEFUN ("delete-directory", Fdelete_directory, 1, 1, "FDelete directory: ", /* | |
| 1992 Delete a directory. One argument, a file name or directory name string. | |
| 1993 */ | |
| 1994 (dirname_)) | |
| 1995 { | |
| 1996 /* This function can GC. GC checked 1997.04.06. */ | |
| 1997 Lisp_Object handler; | |
| 1998 struct gcpro gcpro1; | |
| 1999 | |
| 2000 CHECK_STRING (dirname_); | |
| 2001 | |
| 2002 GCPRO1 (dirname_); | |
| 2003 dirname_ = Fexpand_file_name (dirname_, Qnil); | |
| 2004 dirname_ = Fdirectory_file_name (dirname_); | |
| 2005 | |
| 2006 handler = Ffind_file_name_handler (dirname_, Qdelete_directory); | |
| 2007 UNGCPRO; | |
| 2008 if (!NILP (handler)) | |
| 2009 return (call2 (handler, Qdelete_directory, dirname_)); | |
| 2010 | |
| 771 | 2011 if (qxe_rmdir (XSTRING_DATA (dirname_)) != 0) |
| 563 | 2012 report_file_error ("Removing directory", dirname_); |
| 428 | 2013 |
| 2014 return Qnil; | |
| 2015 } | |
| 2016 | |
| 2017 DEFUN ("delete-file", Fdelete_file, 1, 1, "fDelete file: ", /* | |
| 442 | 2018 Delete the file named FILENAME (a string). |
| 2019 If FILENAME has multiple names, it continues to exist with the other names. | |
| 428 | 2020 */ |
| 2021 (filename)) | |
| 2022 { | |
| 2023 /* This function can GC. GC checked 1997.04.06. */ | |
| 2024 Lisp_Object handler; | |
| 2025 struct gcpro gcpro1; | |
| 2026 | |
| 2027 CHECK_STRING (filename); | |
| 2028 filename = Fexpand_file_name (filename, Qnil); | |
| 2029 | |
| 2030 GCPRO1 (filename); | |
| 2031 handler = Ffind_file_name_handler (filename, Qdelete_file); | |
| 2032 UNGCPRO; | |
| 2033 if (!NILP (handler)) | |
| 2034 return call2 (handler, Qdelete_file, filename); | |
| 2035 | |
| 771 | 2036 if (0 > qxe_unlink (XSTRING_DATA (filename))) |
| 563 | 2037 report_file_error ("Removing old name", filename); |
| 428 | 2038 return Qnil; |
| 2039 } | |
| 2040 | |
| 2041 static Lisp_Object | |
| 2286 | 2042 internal_delete_file_1 (Lisp_Object UNUSED (ignore), |
| 2043 Lisp_Object UNUSED (ignore2)) | |
| 428 | 2044 { |
| 2045 return Qt; | |
| 2046 } | |
| 2047 | |
| 2048 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */ | |
| 2049 | |
| 2050 int | |
| 2051 internal_delete_file (Lisp_Object filename) | |
| 2052 { | |
| 2053 /* This function can GC. GC checked 1997.04.06. */ | |
| 2054 return NILP (condition_case_1 (Qt, Fdelete_file, filename, | |
| 2055 internal_delete_file_1, Qnil)); | |
| 2056 } | |
| 2057 | |
| 2058 DEFUN ("rename-file", Frename_file, 2, 3, | |
| 2059 "fRename file: \nFRename %s to file: \np", /* | |
| 444 | 2060 Rename FILENAME as NEWNAME. Both args must be strings. |
| 2061 If file has names other than FILENAME, it continues to have those names. | |
| 428 | 2062 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2063 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2064 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2065 This is what happens in interactive use with M-x. | |
| 2066 */ | |
| 2067 (filename, newname, ok_if_already_exists)) | |
| 2068 { | |
| 2069 /* This function can GC. GC checked 1997.04.06. */ | |
| 2070 Lisp_Object handler; | |
| 2071 struct gcpro gcpro1, gcpro2; | |
| 2072 | |
| 2073 GCPRO2 (filename, newname); | |
| 2074 CHECK_STRING (filename); | |
| 2075 CHECK_STRING (newname); | |
| 2076 filename = Fexpand_file_name (filename, Qnil); | |
| 2077 newname = Fexpand_file_name (newname, Qnil); | |
| 2078 | |
| 2079 /* If the file name has special constructs in it, | |
| 2080 call the corresponding file handler. */ | |
| 2081 handler = Ffind_file_name_handler (filename, Qrename_file); | |
| 2082 if (NILP (handler)) | |
| 2083 handler = Ffind_file_name_handler (newname, Qrename_file); | |
| 2084 if (!NILP (handler)) | |
| 2085 { | |
| 2086 UNGCPRO; | |
| 2087 return call4 (handler, Qrename_file, | |
| 2088 filename, newname, ok_if_already_exists); | |
| 2089 } | |
| 2090 | |
| 2091 /* When second argument is a directory, rename the file into it. | |
| 2092 (rename-file "foo" "bar/") == (rename-file "foo" "bar/foo") | |
| 2093 */ | |
| 2094 if (!NILP (Ffile_directory_p (newname))) | |
| 2095 { | |
| 2096 Lisp_Object args[3]; | |
| 2097 struct gcpro ngcpro1; | |
| 2098 int i = 1; | |
| 2099 | |
| 2100 args[0] = newname; | |
| 2101 args[1] = Qnil; args[2] = Qnil; | |
| 2102 NGCPRO1 (*args); | |
| 2103 ngcpro1.nvars = 3; | |
| 826 | 2104 if (string_byte (newname, XSTRING_LENGTH (newname) - 1) != '/') |
| 428 | 2105 args[i++] = build_string ("/"); |
| 2106 args[i++] = Ffile_name_nondirectory (filename); | |
| 2107 newname = Fconcat (i, args); | |
| 2108 NUNGCPRO; | |
| 2109 } | |
| 2110 | |
| 2111 if (NILP (ok_if_already_exists) | |
| 2112 || INTP (ok_if_already_exists)) | |
| 2113 barf_or_query_if_file_exists (newname, "rename to it", | |
| 2114 INTP (ok_if_already_exists), 0); | |
| 2115 | |
| 442 | 2116 /* We have configure check for rename() and emulate using |
| 2117 link()/unlink() if necessary. */ | |
| 771 | 2118 if (0 > qxe_rename (XSTRING_DATA (filename), XSTRING_DATA (newname))) |
| 428 | 2119 { |
| 2120 if (errno == EXDEV) | |
| 2121 { | |
| 2122 Fcopy_file (filename, newname, | |
| 2123 /* We have already prompted if it was an integer, | |
| 2124 so don't have copy-file prompt again. */ | |
| 2125 (NILP (ok_if_already_exists) ? Qnil : Qt), | |
| 2126 Qt); | |
| 2127 Fdelete_file (filename); | |
| 2128 } | |
| 2129 else | |
| 2130 { | |
| 563 | 2131 report_file_error ("Renaming", list3 (Qunbound, filename, newname)); |
| 428 | 2132 } |
| 2133 } | |
| 2134 UNGCPRO; | |
| 2135 return Qnil; | |
| 2136 } | |
| 2137 | |
| 2138 DEFUN ("add-name-to-file", Fadd_name_to_file, 2, 3, | |
| 2139 "fAdd name to file: \nFName to add to %s: \np", /* | |
| 444 | 2140 Give FILENAME additional name NEWNAME. Both args must be strings. |
| 428 | 2141 Signals a `file-already-exists' error if a file NEWNAME already exists |
| 2142 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2143 A number as third arg means request confirmation if NEWNAME already exists. | |
| 2144 This is what happens in interactive use with M-x. | |
| 2145 */ | |
| 2146 (filename, newname, ok_if_already_exists)) | |
| 2147 { | |
| 2148 /* This function can GC. GC checked 1997.04.06. */ | |
| 2149 Lisp_Object handler; | |
| 2150 struct gcpro gcpro1, gcpro2; | |
| 2151 | |
| 2152 GCPRO2 (filename, newname); | |
| 2153 CHECK_STRING (filename); | |
| 2154 CHECK_STRING (newname); | |
| 2155 filename = Fexpand_file_name (filename, Qnil); | |
| 2156 newname = Fexpand_file_name (newname, Qnil); | |
| 2157 | |
| 2158 /* If the file name has special constructs in it, | |
| 2159 call the corresponding file handler. */ | |
| 2160 handler = Ffind_file_name_handler (filename, Qadd_name_to_file); | |
| 2161 if (!NILP (handler)) | |
| 2162 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2163 newname, ok_if_already_exists)); | |
| 2164 | |
| 2165 /* If the new name has special constructs in it, | |
| 2166 call the corresponding file handler. */ | |
| 2167 handler = Ffind_file_name_handler (newname, Qadd_name_to_file); | |
| 2168 if (!NILP (handler)) | |
| 2169 RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, | |
| 2170 newname, ok_if_already_exists)); | |
| 2171 | |
| 2172 if (NILP (ok_if_already_exists) | |
| 2173 || INTP (ok_if_already_exists)) | |
| 2174 barf_or_query_if_file_exists (newname, "make it a new name", | |
| 2175 INTP (ok_if_already_exists), 0); | |
| 771 | 2176 /* #### Emacs 20.6 contains an implementation of link() in w32.c. |
| 2177 Need to port. */ | |
| 2178 #ifndef HAVE_LINK | |
| 563 | 2179 signal_error_2 (Qunimplemented, "Adding new name", filename, newname); |
| 771 | 2180 #else /* HAVE_LINK */ |
| 2181 qxe_unlink (XSTRING_DATA (newname)); | |
| 2182 if (0 > qxe_link (XSTRING_DATA (filename), XSTRING_DATA (newname))) | |
| 428 | 2183 { |
| 2184 report_file_error ("Adding new name", | |
| 563 | 2185 list3 (Qunbound, filename, newname)); |
| 428 | 2186 } |
| 771 | 2187 #endif /* HAVE_LINK */ |
| 428 | 2188 |
| 2189 UNGCPRO; | |
| 2190 return Qnil; | |
| 2191 } | |
| 2192 | |
| 2193 DEFUN ("make-symbolic-link", Fmake_symbolic_link, 2, 3, | |
| 2194 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", /* | |
| 2195 Make a symbolic link to FILENAME, named LINKNAME. Both args strings. | |
| 2196 Signals a `file-already-exists' error if a file LINKNAME already exists | |
| 2197 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil. | |
| 2198 A number as third arg means request confirmation if LINKNAME already exists. | |
| 2199 This happens for interactive use with M-x. | |
|
4465
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Document Win32 symlink behaviour; adjust tests to take it into a/c.
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parents:
4383
diff
changeset
|
2200 |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
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changeset
|
2201 On platforms where symbolic links are not available, any file handlers will |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2202 be run, but the check for the existence of LINKNAME will not be done, and |
|
732b87cfabf2
Document Win32 symlink behaviour; adjust tests to take it into a/c.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4383
diff
changeset
|
2203 the symbolic link will not be created. |
| 428 | 2204 */ |
| 2205 (filename, linkname, ok_if_already_exists)) | |
| 2206 { | |
| 2207 /* This function can GC. GC checked 1997.06.04. */ | |
| 442 | 2208 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 428 | 2209 Lisp_Object handler; |
| 2210 struct gcpro gcpro1, gcpro2; | |
| 2211 | |
| 2212 GCPRO2 (filename, linkname); | |
| 2213 CHECK_STRING (filename); | |
| 2214 CHECK_STRING (linkname); | |
| 2215 /* If the link target has a ~, we must expand it to get | |
| 2216 a truly valid file name. Otherwise, do not expand; | |
| 2217 we want to permit links to relative file names. */ | |
| 826 | 2218 if (string_byte (filename, 0) == '~') |
| 428 | 2219 filename = Fexpand_file_name (filename, Qnil); |
| 2220 linkname = Fexpand_file_name (linkname, Qnil); | |
| 2221 | |
| 2222 /* If the file name has special constructs in it, | |
| 2223 call the corresponding file handler. */ | |
| 2224 handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); | |
| 2225 if (!NILP (handler)) | |
| 2226 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, linkname, | |
| 2227 ok_if_already_exists)); | |
| 2228 | |
| 2229 /* If the new link name has special constructs in it, | |
| 2230 call the corresponding file handler. */ | |
| 2231 handler = Ffind_file_name_handler (linkname, Qmake_symbolic_link); | |
| 2232 if (!NILP (handler)) | |
| 2233 RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, | |
| 2234 linkname, ok_if_already_exists)); | |
| 2235 | |
| 771 | 2236 #ifdef HAVE_SYMLINK |
| 428 | 2237 if (NILP (ok_if_already_exists) |
| 2238 || INTP (ok_if_already_exists)) | |
| 2239 barf_or_query_if_file_exists (linkname, "make it a link", | |
| 2240 INTP (ok_if_already_exists), 0); | |
| 2241 | |
| 771 | 2242 qxe_unlink (XSTRING_DATA (linkname)); |
| 2243 if (0 > qxe_symlink (XSTRING_DATA (filename), | |
| 2244 XSTRING_DATA (linkname))) | |
| 428 | 2245 { |
| 2246 report_file_error ("Making symbolic link", | |
| 563 | 2247 list3 (Qunbound, filename, linkname)); |
| 428 | 2248 } |
| 771 | 2249 #endif |
| 442 | 2250 |
| 428 | 2251 UNGCPRO; |
| 2252 return Qnil; | |
| 2253 } | |
| 2254 | |
| 2255 #ifdef HPUX_NET | |
| 2256 | |
| 2257 DEFUN ("sysnetunam", Fsysnetunam, 2, 2, 0, /* | |
| 2258 Open a network connection to PATH using LOGIN as the login string. | |
| 2259 */ | |
| 2260 (path, login)) | |
| 2261 { | |
| 2262 int netresult; | |
| 1333 | 2263 const Extbyte *path_ext; |
| 2264 const Extbyte *login_ext; | |
| 428 | 2265 |
| 2266 CHECK_STRING (path); | |
| 2267 CHECK_STRING (login); | |
| 2268 | |
| 2269 /* netunam, being a strange-o system call only used once, is not | |
| 2270 encapsulated. */ | |
| 440 | 2271 |
| 442 | 2272 LISP_STRING_TO_EXTERNAL (path, path_ext, Qfile_name); |
| 2273 LISP_STRING_TO_EXTERNAL (login, login_ext, Qnative); | |
| 440 | 2274 |
| 2275 netresult = netunam (path_ext, login_ext); | |
| 2276 | |
| 2277 return netresult == -1 ? Qnil : Qt; | |
| 428 | 2278 } |
| 2279 #endif /* HPUX_NET */ | |
| 2280 | |
| 2281 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, 1, 1, 0, /* | |
| 2282 Return t if file FILENAME specifies an absolute path name. | |
| 2283 On Unix, this is a name starting with a `/' or a `~'. | |
| 2284 */ | |
| 2285 (filename)) | |
| 2286 { | |
| 2287 /* This function does not GC */ | |
| 867 | 2288 Ibyte *ptr; |
| 428 | 2289 |
| 2290 CHECK_STRING (filename); | |
| 2291 ptr = XSTRING_DATA (filename); | |
| 2292 return (IS_DIRECTORY_SEP (*ptr) || *ptr == '~' | |
| 657 | 2293 #ifdef WIN32_FILENAMES |
| 428 | 2294 || (IS_DRIVE (*ptr) && ptr[1] == ':' && IS_DIRECTORY_SEP (ptr[2])) |
| 2295 #endif | |
| 2296 ) ? Qt : Qnil; | |
| 2297 } | |
| 2298 | |
| 2299 /* Return nonzero if file FILENAME exists and can be executed. */ | |
| 2300 | |
| 2301 static int | |
| 771 | 2302 check_executable (Lisp_Object filename) |
| 428 | 2303 { |
| 442 | 2304 #ifdef WIN32_NATIVE |
| 428 | 2305 struct stat st; |
| 771 | 2306 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2307 return 0; |
| 2308 return ((st.st_mode & S_IEXEC) != 0); | |
| 442 | 2309 #else /* not WIN32_NATIVE */ |
| 428 | 2310 #ifdef HAVE_EACCESS |
| 771 | 2311 return qxe_eaccess (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2312 #else |
| 2313 /* Access isn't quite right because it uses the real uid | |
| 2314 and we really want to test with the effective uid. | |
| 2315 But Unix doesn't give us a right way to do it. */ | |
| 771 | 2316 return qxe_access (XSTRING_DATA (filename), X_OK) >= 0; |
| 428 | 2317 #endif /* HAVE_EACCESS */ |
| 442 | 2318 #endif /* not WIN32_NATIVE */ |
| 428 | 2319 } |
| 2320 | |
| 2321 /* Return nonzero if file FILENAME exists and can be written. */ | |
| 2322 | |
| 2323 static int | |
| 867 | 2324 check_writable (const Ibyte *filename) |
| 428 | 2325 { |
| 3728 | 2326 #if defined(WIN32_NATIVE) || defined(CYGWIN) |
| 2327 #ifdef CYGWIN | |
| 2328 char filename_buffer[PATH_MAX]; | |
| 2329 #endif | |
| 2330 // Since this has to work for a directory, we can't just call 'CreateFile' | |
| 2331 PSECURITY_DESCRIPTOR pDesc; /* Must be freed with LocalFree */ | |
| 2332 /* these need not be freed, they point into pDesc */ | |
| 2333 PSID psidOwner; | |
| 2334 PSID psidGroup; | |
| 2335 PACL pDacl; | |
| 2336 PACL pSacl; | |
| 2337 /* end of insides of descriptor */ | |
| 2338 DWORD error; | |
| 2339 DWORD attributes; | |
| 2340 HANDLE tokenHandle; | |
| 2341 GENERIC_MAPPING genericMapping; | |
| 2342 DWORD accessMask; | |
| 2343 PRIVILEGE_SET PrivilegeSet; | |
| 2344 DWORD dwPrivSetSize = sizeof( PRIVILEGE_SET ); | |
| 2345 BOOL fAccessGranted = FALSE; | |
| 3781 | 2346 DWORD dwAccessAllowed; |
| 2347 Extbyte *fnameext; | |
| 3728 | 2348 |
| 2349 #ifdef CYGWIN | |
| 2350 cygwin_conv_to_full_win32_path(filename, filename_buffer); | |
| 2351 filename = (Ibyte*)filename_buffer; | |
| 2352 #endif | |
| 2353 | |
| 2354 C_STRING_TO_TSTR(filename, fnameext); | |
| 3781 | 2355 |
| 2356 // First check for a normal file with the old-style readonly bit | |
| 2357 attributes = qxeGetFileAttributes(fnameext); | |
| 2358 if (FILE_ATTRIBUTE_READONLY == (attributes & (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_READONLY))) | |
| 2359 return 0; | |
| 2360 | |
| 3728 | 2361 /* Win32 prototype lacks const. */ |
| 2362 error = qxeGetNamedSecurityInfo(fnameext, SE_FILE_OBJECT, | |
| 3781 | 2363 DACL_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION|OWNER_SECURITY_INFORMATION, |
| 2364 &psidOwner, &psidGroup, &pDacl, &pSacl, &pDesc); | |
| 3728 | 2365 if(error != ERROR_SUCCESS) { // FAT? |
| 3781 | 2366 attributes = qxeGetFileAttributes(fnameext); |
| 3728 | 2367 return (attributes & FILE_ATTRIBUTE_DIRECTORY) || (0 == (attributes & FILE_ATTRIBUTE_READONLY)); |
| 2368 } | |
| 2369 | |
| 2370 genericMapping.GenericRead = FILE_GENERIC_READ; | |
| 2371 genericMapping.GenericWrite = FILE_GENERIC_WRITE; | |
| 2372 genericMapping.GenericExecute = FILE_GENERIC_EXECUTE; | |
| 2373 genericMapping.GenericAll = FILE_ALL_ACCESS; | |
| 2374 | |
| 2375 if(!ImpersonateSelf(SecurityDelegation)) { | |
| 2376 return 0; | |
| 2377 } | |
| 2378 if(!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, &tokenHandle)) { | |
| 2379 return 0; | |
| 2380 } | |
| 2381 | |
| 2382 accessMask = GENERIC_WRITE; | |
| 2383 MapGenericMask(&accessMask, &genericMapping); | |
| 2384 | |
| 2385 if(!AccessCheck(pDesc, tokenHandle, accessMask, &genericMapping, | |
| 2386 &PrivilegeSet, // receives privileges used in check | |
| 2387 &dwPrivSetSize, // size of PrivilegeSet buffer | |
| 2388 &dwAccessAllowed, // receives mask of allowed access rights | |
| 2389 &fAccessGranted)) | |
| 2390 { | |
| 2391 CloseHandle(tokenHandle); | |
| 2392 RevertToSelf(); | |
| 2393 LocalFree(pDesc); | |
| 2394 return 0; | |
| 2395 } | |
| 2396 CloseHandle(tokenHandle); | |
| 2397 RevertToSelf(); | |
| 2398 LocalFree(pDesc); | |
| 2399 return fAccessGranted == TRUE; | |
| 2400 #else | |
| 428 | 2401 #ifdef HAVE_EACCESS |
| 771 | 2402 return (qxe_eaccess (filename, W_OK) >= 0); |
| 428 | 2403 #else |
| 2404 /* Access isn't quite right because it uses the real uid | |
| 2405 and we really want to test with the effective uid. | |
| 2406 But Unix doesn't give us a right way to do it. | |
| 2407 Opening with O_WRONLY could work for an ordinary file, | |
| 2408 but would lose for directories. */ | |
| 771 | 2409 return (qxe_access (filename, W_OK) >= 0); |
| 428 | 2410 #endif |
| 3728 | 2411 #endif |
| 428 | 2412 } |
| 2413 | |
| 2414 DEFUN ("file-exists-p", Ffile_exists_p, 1, 1, 0, /* | |
| 2415 Return t if file FILENAME exists. (This does not mean you can read it.) | |
| 2416 See also `file-readable-p' and `file-attributes'. | |
| 2417 */ | |
| 2418 (filename)) | |
| 2419 { | |
| 442 | 2420 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 2421 Lisp_Object abspath; |
| 2422 Lisp_Object handler; | |
| 2423 struct stat statbuf; | |
| 2424 struct gcpro gcpro1; | |
| 2425 | |
| 2426 CHECK_STRING (filename); | |
| 2427 abspath = Fexpand_file_name (filename, Qnil); | |
| 2428 | |
| 2429 /* If the file name has special constructs in it, | |
| 2430 call the corresponding file handler. */ | |
| 2431 GCPRO1 (abspath); | |
| 2432 handler = Ffind_file_name_handler (abspath, Qfile_exists_p); | |
| 2433 UNGCPRO; | |
| 2434 if (!NILP (handler)) | |
| 2435 return call2 (handler, Qfile_exists_p, abspath); | |
| 2436 | |
| 771 | 2437 return qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0 ? Qt : Qnil; |
| 428 | 2438 } |
| 2439 | |
| 2440 DEFUN ("file-executable-p", Ffile_executable_p, 1, 1, 0, /* | |
| 2441 Return t if FILENAME can be executed by you. | |
| 2442 For a directory, this means you can access files in that directory. | |
| 2443 */ | |
| 2444 (filename)) | |
| 2445 | |
| 2446 { | |
| 442 | 2447 /* This function can GC. GC checked 07-11-2000 ben. */ |
| 428 | 2448 Lisp_Object abspath; |
| 2449 Lisp_Object handler; | |
| 2450 struct gcpro gcpro1; | |
| 2451 | |
| 2452 CHECK_STRING (filename); | |
| 2453 abspath = Fexpand_file_name (filename, Qnil); | |
| 2454 | |
| 2455 /* If the file name has special constructs in it, | |
| 2456 call the corresponding file handler. */ | |
| 2457 GCPRO1 (abspath); | |
| 2458 handler = Ffind_file_name_handler (abspath, Qfile_executable_p); | |
| 2459 UNGCPRO; | |
| 2460 if (!NILP (handler)) | |
| 2461 return call2 (handler, Qfile_executable_p, abspath); | |
| 2462 | |
| 771 | 2463 return check_executable (abspath) ? Qt : Qnil; |
| 428 | 2464 } |
| 2465 | |
| 2466 DEFUN ("file-readable-p", Ffile_readable_p, 1, 1, 0, /* | |
| 2467 Return t if file FILENAME exists and you can read it. | |
| 2468 See also `file-exists-p' and `file-attributes'. | |
| 2469 */ | |
| 2470 (filename)) | |
| 2471 { | |
| 2472 /* This function can GC */ | |
| 2473 Lisp_Object abspath = Qnil; | |
| 2474 Lisp_Object handler; | |
| 2475 struct gcpro gcpro1; | |
| 2476 GCPRO1 (abspath); | |
| 2477 | |
| 2478 CHECK_STRING (filename); | |
| 2479 abspath = Fexpand_file_name (filename, Qnil); | |
| 2480 | |
| 2481 /* If the file name has special constructs in it, | |
| 2482 call the corresponding file handler. */ | |
| 2483 handler = Ffind_file_name_handler (abspath, Qfile_readable_p); | |
| 2484 if (!NILP (handler)) | |
| 2485 RETURN_UNGCPRO (call2 (handler, Qfile_readable_p, abspath)); | |
| 2486 | |
| 2526 | 2487 #if defined (WIN32_FILENAMES) |
| 428 | 2488 /* Under MS-DOS and Windows, open does not work for directories. */ |
| 2489 UNGCPRO; | |
| 771 | 2490 if (qxe_access (XSTRING_DATA (abspath), 0) == 0) |
| 428 | 2491 return Qt; |
| 2492 else | |
| 2493 return Qnil; | |
| 657 | 2494 #else /* not WIN32_FILENAMES */ |
| 428 | 2495 { |
| 771 | 2496 int desc = qxe_interruptible_open (XSTRING_DATA (abspath), |
| 2497 O_RDONLY | OPEN_BINARY, 0); | |
| 428 | 2498 UNGCPRO; |
| 2499 if (desc < 0) | |
| 2500 return Qnil; | |
| 771 | 2501 retry_close (desc); |
| 428 | 2502 return Qt; |
| 2503 } | |
| 657 | 2504 #endif /* not WIN32_FILENAMES */ |
| 428 | 2505 } |
| 2506 | |
| 2507 /* Having this before file-symlink-p mysteriously caused it to be forgotten | |
| 2508 on the RT/PC. */ | |
| 2509 DEFUN ("file-writable-p", Ffile_writable_p, 1, 1, 0, /* | |
| 2510 Return t if file FILENAME can be written or created by you. | |
| 2511 */ | |
| 2512 (filename)) | |
| 2513 { | |
| 2514 /* This function can GC. GC checked 1997.04.10. */ | |
| 2515 Lisp_Object abspath, dir; | |
| 2516 Lisp_Object handler; | |
| 2517 struct stat statbuf; | |
| 2518 struct gcpro gcpro1; | |
| 2519 | |
| 2520 CHECK_STRING (filename); | |
| 2521 abspath = Fexpand_file_name (filename, Qnil); | |
| 2522 | |
| 2523 /* If the file name has special constructs in it, | |
| 2524 call the corresponding file handler. */ | |
| 2525 GCPRO1 (abspath); | |
| 2526 handler = Ffind_file_name_handler (abspath, Qfile_writable_p); | |
| 2527 UNGCPRO; | |
| 2528 if (!NILP (handler)) | |
| 2529 return call2 (handler, Qfile_writable_p, abspath); | |
| 2530 | |
| 771 | 2531 if (qxe_stat (XSTRING_DATA (abspath), &statbuf) >= 0) |
| 2532 return (check_writable (XSTRING_DATA (abspath)) | |
| 428 | 2533 ? Qt : Qnil); |
| 2534 | |
| 2535 | |
| 2536 GCPRO1 (abspath); | |
| 2537 dir = Ffile_name_directory (abspath); | |
| 2538 UNGCPRO; | |
| 867 | 2539 return (check_writable (!NILP (dir) ? XSTRING_DATA (dir) : (Ibyte *) "") |
| 428 | 2540 ? Qt : Qnil); |
| 2541 } | |
| 2542 | |
| 2543 DEFUN ("file-symlink-p", Ffile_symlink_p, 1, 1, 0, /* | |
| 2544 Return non-nil if file FILENAME is the name of a symbolic link. | |
| 2545 The value is the name of the file to which it is linked. | |
| 2546 Otherwise returns nil. | |
| 2547 */ | |
| 2548 (filename)) | |
| 2549 { | |
| 2550 /* This function can GC. GC checked 1997.04.10. */ | |
| 442 | 2551 /* XEmacs change: run handlers even if local machine doesn't have symlinks */ |
| 771 | 2552 #ifdef HAVE_READLINK |
| 867 | 2553 Ibyte *buf; |
| 428 | 2554 int bufsize; |
| 2555 int valsize; | |
| 2556 Lisp_Object val; | |
| 442 | 2557 #endif |
| 428 | 2558 Lisp_Object handler; |
| 2559 struct gcpro gcpro1; | |
| 2560 | |
| 2561 CHECK_STRING (filename); | |
| 2562 filename = Fexpand_file_name (filename, Qnil); | |
| 2563 | |
| 2564 /* If the file name has special constructs in it, | |
| 2565 call the corresponding file handler. */ | |
| 2566 GCPRO1 (filename); | |
| 2567 handler = Ffind_file_name_handler (filename, Qfile_symlink_p); | |
| 2568 UNGCPRO; | |
| 2569 if (!NILP (handler)) | |
| 2570 return call2 (handler, Qfile_symlink_p, filename); | |
| 2571 | |
| 771 | 2572 #ifdef HAVE_READLINK |
| 428 | 2573 bufsize = 100; |
| 2574 while (1) | |
| 2575 { | |
| 867 | 2576 buf = xnew_array_and_zero (Ibyte, bufsize); |
| 771 | 2577 valsize = qxe_readlink (XSTRING_DATA (filename), |
| 2578 buf, bufsize); | |
| 428 | 2579 if (valsize < bufsize) break; |
| 2580 /* Buffer was not long enough */ | |
| 1726 | 2581 xfree (buf, Ibyte *); |
| 428 | 2582 bufsize *= 2; |
| 2583 } | |
| 2584 if (valsize == -1) | |
| 2585 { | |
| 1726 | 2586 xfree (buf, Ibyte *); |
| 428 | 2587 return Qnil; |
| 2588 } | |
| 771 | 2589 val = make_string (buf, valsize); |
| 1726 | 2590 xfree (buf, Ibyte *); |
| 428 | 2591 return val; |
| 2526 | 2592 #elif defined (WIN32_NATIVE) |
| 2593 if (mswindows_shortcuts_are_symlinks) | |
| 2594 { | |
| 2595 /* We want to resolve the directory component and leave the rest | |
| 2596 alone. */ | |
| 2597 Ibyte *path = XSTRING_DATA (filename); | |
| 2598 Ibyte *dirend = | |
| 2599 find_end_of_directory_component (path, XSTRING_LENGTH (filename)); | |
| 2600 Ibyte *fname; | |
| 2601 DECLARE_EISTRING (dir); | |
| 2602 | |
| 2603 if (dirend != path) | |
| 2604 { | |
| 2605 Ibyte *resdir; | |
| 2606 DECLARE_EISTRING (resname); | |
| 2607 | |
| 2608 eicpy_raw (dir, path, dirend - path); | |
| 2609 PATHNAME_RESOLVE_LINKS (eidata (dir), resdir); | |
| 2610 eicpy_rawz (resname, resdir); | |
| 2611 eicat_rawz (resname, dirend); | |
| 2612 path = eidata (resname); | |
| 2613 } | |
| 2614 | |
| 2615 fname = mswindows_read_link (path); | |
| 2616 if (!fname) | |
| 2617 return Qnil; | |
| 2618 { | |
| 2619 Lisp_Object val = build_intstring (fname); | |
| 2620 xfree (fname, Ibyte *); | |
| 2621 return val; | |
| 2622 } | |
| 2623 } | |
| 428 | 2624 return Qnil; |
| 2526 | 2625 #else |
| 2626 return Qnil; | |
| 2627 #endif | |
| 428 | 2628 } |
| 2629 | |
| 2630 DEFUN ("file-directory-p", Ffile_directory_p, 1, 1, 0, /* | |
| 2631 Return t if file FILENAME is the name of a directory as a file. | |
| 2632 A directory name spec may be given instead; then the value is t | |
| 2633 if the directory so specified exists and really is a directory. | |
| 2634 */ | |
| 2635 (filename)) | |
| 2636 { | |
| 2637 /* This function can GC. GC checked 1997.04.10. */ | |
| 2638 Lisp_Object abspath; | |
| 2639 struct stat st; | |
| 2640 Lisp_Object handler; | |
| 2641 struct gcpro gcpro1; | |
| 2642 | |
| 2643 GCPRO1 (current_buffer->directory); | |
| 2644 abspath = expand_and_dir_to_file (filename, | |
| 2645 current_buffer->directory); | |
| 2646 UNGCPRO; | |
| 2647 | |
| 2648 /* If the file name has special constructs in it, | |
| 2649 call the corresponding file handler. */ | |
| 2650 GCPRO1 (abspath); | |
| 2651 handler = Ffind_file_name_handler (abspath, Qfile_directory_p); | |
| 2652 UNGCPRO; | |
| 2653 if (!NILP (handler)) | |
| 2654 return call2 (handler, Qfile_directory_p, abspath); | |
| 2655 | |
| 771 | 2656 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2657 return Qnil; |
| 2658 return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
| 2659 } | |
| 2660 | |
| 2661 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, 1, 1, 0, /* | |
| 2662 Return t if file FILENAME is the name of a directory as a file, | |
| 2663 and files in that directory can be opened by you. In order to use a | |
| 2664 directory as a buffer's current directory, this predicate must return true. | |
| 2665 A directory name spec may be given instead; then the value is t | |
| 2666 if the directory so specified exists and really is a readable and | |
| 2667 searchable directory. | |
| 2668 */ | |
| 2669 (filename)) | |
| 2670 { | |
| 2671 /* This function can GC. GC checked 1997.04.10. */ | |
| 2672 Lisp_Object handler; | |
| 2673 | |
| 2674 /* If the file name has special constructs in it, | |
| 2675 call the corresponding file handler. */ | |
| 2676 handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); | |
| 2677 if (!NILP (handler)) | |
| 2678 return call2 (handler, Qfile_accessible_directory_p, | |
| 2679 filename); | |
| 2680 | |
| 2526 | 2681 #if !defined (WIN32_NATIVE) |
| 428 | 2682 if (NILP (Ffile_directory_p (filename))) |
| 2683 return (Qnil); | |
| 2684 else | |
| 2685 return Ffile_executable_p (filename); | |
| 2686 #else | |
| 2687 { | |
| 2688 int tem; | |
| 2689 struct gcpro gcpro1; | |
| 2690 /* It's an unlikely combination, but yes we really do need to gcpro: | |
| 2691 Suppose that file-accessible-directory-p has no handler, but | |
| 2692 file-directory-p does have a handler; this handler causes a GC which | |
| 2693 relocates the string in `filename'; and finally file-directory-p | |
| 2694 returns non-nil. Then we would end up passing a garbaged string | |
| 2695 to file-executable-p. */ | |
| 2696 GCPRO1 (filename); | |
| 2697 tem = (NILP (Ffile_directory_p (filename)) | |
| 2698 || NILP (Ffile_executable_p (filename))); | |
| 2699 UNGCPRO; | |
| 2700 return tem ? Qnil : Qt; | |
| 2701 } | |
| 442 | 2702 #endif /* !defined(WIN32_NATIVE) */ |
| 428 | 2703 } |
| 2704 | |
| 2705 DEFUN ("file-regular-p", Ffile_regular_p, 1, 1, 0, /* | |
| 2706 Return t if file FILENAME is the name of a regular file. | |
| 2707 This is the sort of file that holds an ordinary stream of data bytes. | |
| 2708 */ | |
| 2709 (filename)) | |
| 2710 { | |
| 2711 /* This function can GC. GC checked 1997.04.10. */ | |
| 2712 Lisp_Object abspath; | |
| 2713 struct stat st; | |
| 2714 Lisp_Object handler; | |
| 2715 struct gcpro gcpro1; | |
| 2716 | |
| 2717 GCPRO1 (current_buffer->directory); | |
| 2718 abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
| 2719 UNGCPRO; | |
| 2720 | |
| 2721 /* If the file name has special constructs in it, | |
| 2722 call the corresponding file handler. */ | |
| 2723 GCPRO1 (abspath); | |
| 2724 handler = Ffind_file_name_handler (abspath, Qfile_regular_p); | |
| 2725 UNGCPRO; | |
| 2726 if (!NILP (handler)) | |
| 2727 return call2 (handler, Qfile_regular_p, abspath); | |
| 2728 | |
| 771 | 2729 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2730 return Qnil; |
| 2731 return (st.st_mode & S_IFMT) == S_IFREG ? Qt : Qnil; | |
| 2732 } | |
| 2733 | |
| 2734 DEFUN ("file-modes", Ffile_modes, 1, 1, 0, /* | |
| 444 | 2735 Return mode bits of file named FILENAME, as an integer. |
| 428 | 2736 */ |
| 2737 (filename)) | |
| 2738 { | |
| 2739 /* This function can GC. GC checked 1997.04.10. */ | |
| 2740 Lisp_Object abspath; | |
| 2741 struct stat st; | |
| 2742 Lisp_Object handler; | |
| 2743 struct gcpro gcpro1; | |
| 2744 | |
| 2745 GCPRO1 (current_buffer->directory); | |
| 2746 abspath = expand_and_dir_to_file (filename, | |
| 2747 current_buffer->directory); | |
| 2748 UNGCPRO; | |
| 2749 | |
| 2750 /* If the file name has special constructs in it, | |
| 2751 call the corresponding file handler. */ | |
| 2752 GCPRO1 (abspath); | |
| 2753 handler = Ffind_file_name_handler (abspath, Qfile_modes); | |
| 2754 UNGCPRO; | |
| 2755 if (!NILP (handler)) | |
| 2756 return call2 (handler, Qfile_modes, abspath); | |
| 2757 | |
| 771 | 2758 if (qxe_stat (XSTRING_DATA (abspath), &st) < 0) |
| 428 | 2759 return Qnil; |
| 2760 /* Syncing with FSF 19.34.6 note: not in FSF, #if 0'ed out here. */ | |
| 2761 #if 0 | |
| 442 | 2762 #ifdef WIN32_NATIVE |
| 771 | 2763 if (check_executable (abspath)) |
| 428 | 2764 st.st_mode |= S_IEXEC; |
| 442 | 2765 #endif /* WIN32_NATIVE */ |
| 428 | 2766 #endif /* 0 */ |
| 2767 | |
| 2768 return make_int (st.st_mode & 07777); | |
| 2769 } | |
| 2770 | |
| 2771 DEFUN ("set-file-modes", Fset_file_modes, 2, 2, 0, /* | |
| 444 | 2772 Set mode bits of file named FILENAME to MODE (an integer). |
| 428 | 2773 Only the 12 low bits of MODE are used. |
| 2774 */ | |
| 2775 (filename, mode)) | |
| 2776 { | |
| 2777 /* This function can GC. GC checked 1997.04.10. */ | |
| 2778 Lisp_Object abspath; | |
| 2779 Lisp_Object handler; | |
| 2780 struct gcpro gcpro1; | |
| 2781 | |
| 2782 GCPRO1 (current_buffer->directory); | |
| 2783 abspath = Fexpand_file_name (filename, current_buffer->directory); | |
| 2784 UNGCPRO; | |
| 2785 | |
| 2786 CHECK_INT (mode); | |
| 2787 | |
| 2788 /* If the file name has special constructs in it, | |
| 2789 call the corresponding file handler. */ | |
| 2790 GCPRO1 (abspath); | |
| 2791 handler = Ffind_file_name_handler (abspath, Qset_file_modes); | |
| 2792 UNGCPRO; | |
| 2793 if (!NILP (handler)) | |
| 2794 return call3 (handler, Qset_file_modes, abspath, mode); | |
| 2795 | |
| 771 | 2796 if (qxe_chmod (XSTRING_DATA (abspath), XINT (mode)) < 0) |
| 563 | 2797 report_file_error ("Doing chmod", abspath); |
| 428 | 2798 |
| 2799 return Qnil; | |
| 2800 } | |
| 2801 | |
| 2802 DEFUN ("set-default-file-modes", Fset_default_file_modes, 1, 1, 0, /* | |
| 2803 Set the file permission bits for newly created files. | |
| 444 | 2804 The argument MODE should be an integer; if a bit in MODE is 1, |
| 2805 subsequently created files will not have the permission corresponding | |
| 2806 to that bit enabled. Only the low 9 bits are used. | |
| 428 | 2807 This setting is inherited by subprocesses. |
| 2808 */ | |
| 2809 (mode)) | |
| 2810 { | |
| 2811 CHECK_INT (mode); | |
| 2812 | |
| 2813 umask ((~ XINT (mode)) & 0777); | |
| 2814 | |
| 2815 return Qnil; | |
| 2816 } | |
| 2817 | |
| 2818 DEFUN ("default-file-modes", Fdefault_file_modes, 0, 0, 0, /* | |
| 2819 Return the default file protection for created files. | |
| 2820 The umask value determines which permissions are enabled in newly | |
| 2821 created files. If a permission's bit in the umask is 1, subsequently | |
| 2822 created files will not have that permission enabled. | |
| 2823 */ | |
| 2824 ()) | |
| 2825 { | |
| 2826 int mode; | |
| 2827 | |
| 2828 mode = umask (0); | |
| 2829 umask (mode); | |
| 2830 | |
| 2831 return make_int ((~ mode) & 0777); | |
| 2832 } | |
| 2833 | |
| 2834 DEFUN ("unix-sync", Funix_sync, 0, 0, "", /* | |
| 2835 Tell Unix to finish all pending disk updates. | |
| 2836 */ | |
| 2837 ()) | |
| 2838 { | |
| 442 | 2839 #ifndef WIN32_NATIVE |
| 428 | 2840 sync (); |
| 2841 #endif | |
| 2842 return Qnil; | |
| 2843 } | |
| 2844 | |
| 2845 | |
| 2846 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, 2, 2, 0, /* | |
| 2847 Return t if file FILE1 is newer than file FILE2. | |
| 2848 If FILE1 does not exist, the answer is nil; | |
| 2849 otherwise, if FILE2 does not exist, the answer is t. | |
| 2850 */ | |
| 2851 (file1, file2)) | |
| 2852 { | |
| 2853 /* This function can GC. GC checked 1997.04.10. */ | |
| 2854 Lisp_Object abspath1, abspath2; | |
| 2855 struct stat st; | |
| 2856 int mtime1; | |
| 2857 Lisp_Object handler; | |
| 2858 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 2859 | |
| 2860 CHECK_STRING (file1); | |
| 2861 CHECK_STRING (file2); | |
| 2862 | |
| 2863 abspath1 = Qnil; | |
| 2864 abspath2 = Qnil; | |
| 2865 | |
| 2866 GCPRO3 (abspath1, abspath2, current_buffer->directory); | |
| 2867 abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); | |
| 2868 abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
| 2869 | |
| 2870 /* If the file name has special constructs in it, | |
| 2871 call the corresponding file handler. */ | |
| 2872 handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p); | |
| 2873 if (NILP (handler)) | |
| 2874 handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p); | |
| 2875 UNGCPRO; | |
| 2876 if (!NILP (handler)) | |
| 2877 return call3 (handler, Qfile_newer_than_file_p, abspath1, | |
| 2878 abspath2); | |
| 2879 | |
| 771 | 2880 if (qxe_stat (XSTRING_DATA (abspath1), &st) < 0) |
| 428 | 2881 return Qnil; |
| 2882 | |
| 2883 mtime1 = st.st_mtime; | |
| 2884 | |
| 771 | 2885 if (qxe_stat (XSTRING_DATA (abspath2), &st) < 0) |
| 428 | 2886 return Qt; |
| 2887 | |
| 2888 return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
| 2889 } | |
| 2890 | |
| 2891 | |
| 2892 /* Stack sizes > 2**16 is a good way to elicit compiler bugs */ | |
| 2893 /* #define READ_BUF_SIZE (2 << 16) */ | |
| 2894 #define READ_BUF_SIZE (1 << 15) | |
| 2895 | |
| 2896 DEFUN ("insert-file-contents-internal", Finsert_file_contents_internal, | |
| 2897 1, 7, 0, /* | |
| 2898 Insert contents of file FILENAME after point; no coding-system frobbing. | |
| 2899 This function is identical to `insert-file-contents' except for the | |
| 771 | 2900 handling of the CODESYS and USED-CODESYS arguments. |
| 2901 | |
| 2902 The file is decoded according to CODESYS; if omitted, no conversion | |
| 2903 happens. If USED-CODESYS is non-nil, it should be a symbol, and the actual | |
| 2904 coding system that was used for the decoding is stored into it. It will in | |
| 2905 general be different from CODESYS if CODESYS specifies automatic encoding | |
| 2906 detection or end-of-line detection. | |
| 428 | 2907 |
| 444 | 2908 Currently START and END refer to byte positions (as opposed to character |
| 771 | 2909 positions), even in Mule and under MS Windows. (Fixing this, particularly |
| 2910 under Mule, is very difficult.) | |
| 428 | 2911 */ |
| 444 | 2912 (filename, visit, start, end, replace, codesys, used_codesys)) |
| 428 | 2913 { |
| 2914 /* This function can call lisp */ | |
| 2915 struct stat st; | |
| 2916 int fd; | |
| 2917 int saverrno = 0; | |
| 2918 Charcount inserted = 0; | |
| 2919 int speccount; | |
| 3841 | 2920 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3814 | 2921 Lisp_Object val; |
| 428 | 2922 int total; |
| 867 | 2923 Ibyte read_buf[READ_BUF_SIZE]; |
| 428 | 2924 int mc_count; |
| 2925 struct buffer *buf = current_buffer; | |
| 2926 Lisp_Object curbuf; | |
| 2927 int not_regular = 0; | |
| 771 | 2928 int do_speedy_insert = |
| 2929 coding_system_is_binary (Fget_coding_system (codesys)); | |
| 428 | 2930 |
| 2931 if (buf->base_buffer && ! NILP (visit)) | |
| 563 | 2932 invalid_operation ("Cannot do file visiting in an indirect buffer", Qunbound); |
| 428 | 2933 |
| 2934 /* No need to call Fbarf_if_buffer_read_only() here. | |
| 2935 That's called in begin_multiple_change() or wherever. */ | |
| 2936 | |
| 2937 val = Qnil; | |
| 2938 | |
| 2939 /* #### dmoore - should probably check in various places to see if | |
| 2940 curbuf was killed and if so signal an error? */ | |
| 2941 | |
| 793 | 2942 curbuf = wrap_buffer (buf); |
| 428 | 2943 |
| 3814 | 2944 GCPRO4 (filename, val, visit, curbuf); |
| 428 | 2945 |
| 2946 mc_count = (NILP (replace)) ? | |
| 2947 begin_multiple_change (buf, BUF_PT (buf), BUF_PT (buf)) : | |
| 2948 begin_multiple_change (buf, BUF_BEG (buf), BUF_Z (buf)); | |
| 2949 | |
| 2950 speccount = specpdl_depth (); /* begin_multiple_change also adds | |
| 2951 an unwind_protect */ | |
| 2952 | |
| 2953 filename = Fexpand_file_name (filename, Qnil); | |
| 2954 | |
| 2955 if (!NILP (used_codesys)) | |
| 2956 CHECK_SYMBOL (used_codesys); | |
| 2957 | |
| 444 | 2958 if ( (!NILP (start) || !NILP (end)) && !NILP (visit) ) |
| 563 | 2959 invalid_operation ("Attempt to visit less than an entire file", Qunbound); |
| 428 | 2960 |
| 2961 fd = -1; | |
| 2962 | |
| 771 | 2963 if (qxe_stat (XSTRING_DATA (filename), &st) < 0) |
| 428 | 2964 { |
| 2965 badopen: | |
| 2966 if (NILP (visit)) | |
| 563 | 2967 report_file_error ("Opening input file", filename); |
| 428 | 2968 st.st_mtime = -1; |
| 2969 goto notfound; | |
| 2970 } | |
| 2971 | |
| 2972 #ifdef S_IFREG | |
| 2973 /* Signal an error if we are accessing a non-regular file, with | |
| 444 | 2974 REPLACE, START or END being non-nil. */ |
| 428 | 2975 if (!S_ISREG (st.st_mode)) |
| 2976 { | |
| 2977 not_regular = 1; | |
| 2978 | |
| 2979 if (!NILP (visit)) | |
| 2980 goto notfound; | |
| 2981 | |
| 444 | 2982 if (!NILP (replace) || !NILP (start) || !NILP (end)) |
| 428 | 2983 { |
| 2984 end_multiple_change (buf, mc_count); | |
| 2985 | |
| 444 | 2986 RETURN_UNGCPRO |
| 2987 (Fsignal (Qfile_error, | |
| 771 | 2988 list2 (build_msg_string("not a regular file"), |
| 444 | 2989 filename))); |
| 428 | 2990 } |
| 2991 } | |
| 2992 #endif /* S_IFREG */ | |
| 2993 | |
| 444 | 2994 if (!NILP (start)) |
| 2995 CHECK_INT (start); | |
| 428 | 2996 else |
| 444 | 2997 start = Qzero; |
| 428 | 2998 |
| 2999 if (!NILP (end)) | |
| 3000 CHECK_INT (end); | |
| 3001 | |
| 3002 if (fd < 0) | |
| 3003 { | |
| 771 | 3004 if ((fd = qxe_interruptible_open (XSTRING_DATA (filename), |
| 3005 O_RDONLY | OPEN_BINARY, 0)) < 0) | |
| 428 | 3006 goto badopen; |
| 3007 } | |
| 3008 | |
| 3009 /* Replacement should preserve point as it preserves markers. */ | |
| 3010 if (!NILP (replace)) | |
| 3011 record_unwind_protect (restore_point_unwind, Fpoint_marker (Qnil, Qnil)); | |
| 3012 | |
| 3013 record_unwind_protect (close_file_unwind, make_int (fd)); | |
| 3014 | |
| 3015 /* Supposedly happens on VMS. */ | |
| 3016 if (st.st_size < 0) | |
| 563 | 3017 signal_error (Qfile_error, "File size is negative", Qunbound); |
| 428 | 3018 |
| 3019 if (NILP (end)) | |
| 3020 { | |
| 3021 if (!not_regular) | |
| 3022 { | |
| 3023 end = make_int (st.st_size); | |
| 3024 if (XINT (end) != st.st_size) | |
| 563 | 3025 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3026 } |
| 3027 } | |
| 3028 | |
| 3029 /* If requested, replace the accessible part of the buffer | |
| 3030 with the file contents. Avoid replacing text at the | |
| 3031 beginning or end of the buffer that matches the file contents; | |
| 771 | 3032 that preserves markers pointing to the unchanged parts. */ |
| 3033 /* The replace-mode code is currently implemented by comparing the | |
| 3034 file on disk with the contents in the buffer, character by character. | |
| 3035 That works only if the characters on disk are exactly what will go into | |
| 3036 the buffer -- i.e. `binary' conversion. | |
| 3037 | |
| 3038 FSF tries to implement this in all situations, even the non-binary | |
| 3039 conversion, by (in that case) loading the whole converted file into a | |
| 3040 separate memory area, then doing the comparison. I really don't see | |
| 3041 the point of this, and it will fail spectacularly if the file is many | |
| 3042 megabytes in size. To try to get around this, we could certainly read | |
| 3043 from the beginning and decode as necessary before comparing, but doing | |
| 3044 the same at the end gets very difficult because of the possibility of | |
| 3045 modal coding systems -- trying to decode data from any point forward | |
| 3046 without decoding previous data might always give you different results | |
| 3047 from starting at the beginning. We could try further tricks like | |
| 3048 keeping track of which coding systems are non-modal and providing some | |
| 3049 extra method for such coding systems to be given a chunk of data that | |
| 3050 came from a specified location in a specified file and ask the coding | |
| 3051 systems to return a "sync point" from which the data can be read | |
| 3052 forward and have results guaranteed to be the same as reading from the | |
| 3053 beginning to that point, but I really don't think it's worth it. If | |
| 3054 we implemented the FSF "brute-force" method, we would have to put a | |
| 3055 reasonable maximum file size on the files. Is any of this worth it? | |
| 3056 --ben | |
| 3057 | |
| 3638 | 3058 |
| 3059 It's probably not worth it, and despite what you might take from the | |
| 3060 above, we don't do it currently; that is, for non-"binary" coding | |
| 3061 systems, we don't try to implement replace-mode at all. See the | |
| 3062 do_speedy_insert variable above. The upside of this is that our API | |
| 3063 is consistent and not buggy. -- Aidan Kehoe, Fri Oct 27 21:02:30 CEST | |
| 3064 2006 | |
| 771 | 3065 */ |
| 3066 | |
| 428 | 3067 if (!NILP (replace)) |
| 3068 { | |
| 771 | 3069 if (!do_speedy_insert) |
| 3070 buffer_delete_range (buf, BUF_BEG (buf), BUF_Z (buf), | |
| 3071 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3072 else | |
| 428 | 3073 { |
| 771 | 3074 char buffer[1 << 14]; |
| 3075 Charbpos same_at_start = BUF_BEGV (buf); | |
| 3076 Charbpos same_at_end = BUF_ZV (buf); | |
| 3077 int overlap; | |
| 3078 | |
| 3079 /* Count how many chars at the start of the file | |
| 3080 match the text at the beginning of the buffer. */ | |
| 3081 while (1) | |
| 3082 { | |
| 3083 int nread; | |
| 3084 Charbpos charbpos; | |
| 3085 nread = read_allowing_quit (fd, buffer, sizeof (buffer)); | |
| 3086 if (nread < 0) | |
| 3087 report_file_error ("Reading", filename); | |
| 3088 else if (nread == 0) | |
| 3089 break; | |
| 3090 charbpos = 0; | |
| 3091 while (charbpos < nread && same_at_start < BUF_ZV (buf) | |
| 814 | 3092 && BUF_FETCH_CHAR (buf, same_at_start) == |
| 3093 buffer[charbpos]) | |
| 771 | 3094 same_at_start++, charbpos++; |
| 3095 /* If we found a discrepancy, stop the scan. | |
| 3096 Otherwise loop around and scan the next bufferful. */ | |
| 3097 if (charbpos != nread) | |
| 3098 break; | |
| 3099 } | |
| 3100 /* If the file matches the buffer completely, | |
| 3101 there's no need to replace anything. */ | |
| 3102 if (same_at_start - BUF_BEGV (buf) == st.st_size) | |
| 3103 { | |
| 3104 retry_close (fd); | |
| 3105 unbind_to (speccount); | |
| 3106 /* Truncate the buffer to the size of the file. */ | |
| 3107 buffer_delete_range (buf, same_at_start, same_at_end, | |
| 3108 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 3109 goto handled; | |
| 3110 } | |
| 3111 /* Count how many chars at the end of the file | |
| 3112 match the text at the end of the buffer. */ | |
| 3113 while (1) | |
| 3114 { | |
| 3115 int total_read, nread; | |
| 814 | 3116 Charcount charbpos, curpos, trial; |
| 771 | 3117 |
| 3118 /* At what file position are we now scanning? */ | |
| 3119 curpos = st.st_size - (BUF_ZV (buf) - same_at_end); | |
| 3120 /* If the entire file matches the buffer tail, stop the scan. */ | |
| 3121 if (curpos == 0) | |
| 3122 break; | |
| 3123 /* How much can we scan in the next step? */ | |
| 3124 trial = min (curpos, (Charbpos) sizeof (buffer)); | |
| 3125 if (lseek (fd, curpos - trial, 0) < 0) | |
| 3126 report_file_error ("Setting file position", filename); | |
| 3127 | |
| 3128 total_read = 0; | |
| 3129 while (total_read < trial) | |
| 3130 { | |
| 3131 nread = read_allowing_quit (fd, buffer + total_read, | |
| 3132 trial - total_read); | |
| 3133 if (nread <= 0) | |
| 3134 report_file_error ("IO error reading file", filename); | |
| 3135 total_read += nread; | |
| 3136 } | |
| 3137 /* Scan this bufferful from the end, comparing with | |
| 3138 the Emacs buffer. */ | |
| 3139 charbpos = total_read; | |
| 3140 /* Compare with same_at_start to avoid counting some buffer text | |
| 3141 as matching both at the file's beginning and at the end. */ | |
| 3142 while (charbpos > 0 && same_at_end > same_at_start | |
| 3143 && BUF_FETCH_CHAR (buf, same_at_end - 1) == | |
| 3144 buffer[charbpos - 1]) | |
| 3145 same_at_end--, charbpos--; | |
| 3146 /* If we found a discrepancy, stop the scan. | |
| 3147 Otherwise loop around and scan the preceding bufferful. */ | |
| 3148 if (charbpos != 0) | |
| 3149 break; | |
| 3150 /* If display current starts at beginning of line, | |
| 3151 keep it that way. */ | |
| 3152 if (XBUFFER (XWINDOW (Fselected_window (Qnil))->buffer) == buf) | |
| 3153 XWINDOW (Fselected_window (Qnil))->start_at_line_beg = | |
| 3154 !NILP (Fbolp (wrap_buffer (buf))); | |
| 3155 } | |
| 3156 | |
| 3157 /* Don't try to reuse the same piece of text twice. */ | |
| 3158 overlap = same_at_start - BUF_BEGV (buf) - | |
| 3159 (same_at_end + st.st_size - BUF_ZV (buf)); | |
| 3160 if (overlap > 0) | |
| 3161 same_at_end += overlap; | |
| 3162 | |
| 3163 /* Arrange to read only the nonmatching middle part of the file. */ | |
| 3164 start = make_int (same_at_start - BUF_BEGV (buf)); | |
| 3165 end = make_int (st.st_size - (BUF_ZV (buf) - same_at_end)); | |
| 3166 | |
| 428 | 3167 buffer_delete_range (buf, same_at_start, same_at_end, |
| 3168 !NILP (visit) ? INSDEL_NO_LOCKING : 0); | |
| 771 | 3169 /* Insert from the file at the proper position. */ |
| 3170 BUF_SET_PT (buf, same_at_start); | |
| 428 | 3171 } |
| 3172 } | |
| 3173 | |
| 3174 if (!not_regular) | |
| 3175 { | |
| 444 | 3176 total = XINT (end) - XINT (start); |
| 428 | 3177 |
| 3178 /* Make sure point-max won't overflow after this insertion. */ | |
| 3179 if (total != XINT (make_int (total))) | |
| 563 | 3180 out_of_memory ("Maximum buffer size exceeded", Qunbound); |
| 428 | 3181 } |
| 3182 else | |
| 3183 /* For a special file, all we can do is guess. The value of -1 | |
| 3184 will make the stream functions read as much as possible. */ | |
| 3185 total = -1; | |
| 3186 | |
| 444 | 3187 if (XINT (start) != 0 |
| 428 | 3188 /* why was this here? asked jwz. The reason is that the replace-mode |
| 3189 connivings above will normally put the file pointer other than | |
| 3190 where it should be. */ | |
| 771 | 3191 || (!NILP (replace) && do_speedy_insert)) |
| 428 | 3192 { |
| 444 | 3193 if (lseek (fd, XINT (start), 0) < 0) |
| 563 | 3194 report_file_error ("Setting file position", filename); |
| 428 | 3195 } |
| 3196 | |
| 3197 { | |
| 665 | 3198 Charbpos cur_point = BUF_PT (buf); |
| 428 | 3199 struct gcpro ngcpro1; |
| 3200 Lisp_Object stream = make_filedesc_input_stream (fd, 0, total, | |
| 3201 LSTR_ALLOW_QUIT); | |
| 3202 | |
| 3203 NGCPRO1 (stream); | |
| 3204 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 771 | 3205 stream = make_coding_input_stream |
| 3206 (XLSTREAM (stream), get_coding_system_for_text_file (codesys, 1), | |
| 800 | 3207 CODING_DECODE, 0); |
| 428 | 3208 Lstream_set_buffering (XLSTREAM (stream), LSTREAM_BLOCKN_BUFFERED, 65536); |
| 3209 | |
| 3210 record_unwind_protect (delete_stream_unwind, stream); | |
| 3211 | |
| 3212 /* No need to limit the amount of stuff we attempt to read. (It would | |
| 3213 be incorrect, anyway, when Mule is enabled.) Instead, the limiting | |
| 3214 occurs inside of the filedesc stream. */ | |
| 3215 while (1) | |
| 3216 { | |
| 665 | 3217 Bytecount this_len; |
| 428 | 3218 Charcount cc_inserted; |
| 3219 | |
| 3220 QUIT; | |
| 3221 this_len = Lstream_read (XLSTREAM (stream), read_buf, | |
| 3222 sizeof (read_buf)); | |
| 3223 | |
| 3224 if (this_len <= 0) | |
| 3225 { | |
| 3226 if (this_len < 0) | |
| 3227 saverrno = errno; | |
| 3228 break; | |
| 3229 } | |
| 3230 | |
| 3231 cc_inserted = buffer_insert_raw_string_1 (buf, cur_point, read_buf, | |
| 3232 this_len, | |
| 3233 !NILP (visit) | |
| 3234 ? INSDEL_NO_LOCKING : 0); | |
| 3235 inserted += cc_inserted; | |
| 3236 cur_point += cc_inserted; | |
| 3237 } | |
| 3238 if (!NILP (used_codesys)) | |
| 3239 { | |
| 3240 Fset (used_codesys, | |
| 771 | 3241 XCODING_SYSTEM_NAME |
| 3242 (coding_stream_detected_coding_system (XLSTREAM (stream)))); | |
| 428 | 3243 } |
| 3244 NUNGCPRO; | |
| 3245 } | |
| 3246 | |
| 3247 /* Close the file/stream */ | |
| 771 | 3248 unbind_to (speccount); |
| 428 | 3249 |
| 3250 if (saverrno != 0) | |
| 3251 { | |
| 563 | 3252 errno = saverrno; |
| 3253 report_file_error ("Reading", filename); | |
| 428 | 3254 } |
| 3255 | |
| 3256 notfound: | |
| 3257 handled: | |
| 3258 | |
| 3259 end_multiple_change (buf, mc_count); | |
| 3260 | |
| 3261 if (!NILP (visit)) | |
| 3262 { | |
| 3263 if (!EQ (buf->undo_list, Qt)) | |
| 3264 buf->undo_list = Qnil; | |
| 3814 | 3265 buf->modtime = st.st_mtime; |
| 3266 buf->filename = filename; | |
| 3267 /* XEmacs addition: */ | |
| 3268 /* This function used to be in C, ostensibly so that | |
| 3269 it could be called here. But that's just silly. | |
| 3270 There's no reason C code can't call out to Lisp | |
| 3271 code, and it's a lot cleaner this way. */ | |
| 3272 /* Note: compute-buffer-file-truename is called for | |
| 3273 side-effect! Its return value is intentionally | |
| 3274 ignored. */ | |
| 3275 if (!NILP (Ffboundp (Qcompute_buffer_file_truename))) | |
| 3276 call1 (Qcompute_buffer_file_truename, wrap_buffer (buf)); | |
| 428 | 3277 BUF_SAVE_MODIFF (buf) = BUF_MODIFF (buf); |
| 3278 buf->auto_save_modified = BUF_MODIFF (buf); | |
| 3279 buf->saved_size = make_int (BUF_SIZE (buf)); | |
| 3280 #ifdef CLASH_DETECTION | |
| 3814 | 3281 if (!NILP (buf->file_truename)) |
| 3282 unlock_file (buf->file_truename); | |
| 3283 unlock_file (filename); | |
| 428 | 3284 #endif /* CLASH_DETECTION */ |
| 3285 if (not_regular) | |
| 3286 RETURN_UNGCPRO (Fsignal (Qfile_error, | |
| 771 | 3287 list2 (build_msg_string ("not a regular file"), |
| 428 | 3288 filename))); |
| 3289 | |
| 3290 /* If visiting nonexistent file, return nil. */ | |
| 3291 if (buf->modtime == -1) | |
| 3292 report_file_error ("Opening input file", | |
| 563 | 3293 filename); |
| 428 | 3294 } |
| 3295 | |
| 3296 /* Decode file format */ | |
| 3297 if (inserted > 0) | |
| 3298 { | |
| 3299 Lisp_Object insval = call3 (Qformat_decode, | |
| 3300 Qnil, make_int (inserted), visit); | |
| 3301 CHECK_INT (insval); | |
| 3302 inserted = XINT (insval); | |
| 3303 } | |
| 3304 | |
| 3305 if (inserted > 0) | |
| 3306 { | |
| 2367 | 3307 GC_EXTERNAL_LIST_LOOP_2 (p, Vafter_insert_file_functions) |
| 428 | 3308 { |
| 2367 | 3309 Lisp_Object insval = call1 (p, make_int (inserted)); |
| 428 | 3310 if (!NILP (insval)) |
| 3311 { | |
| 3312 CHECK_NATNUM (insval); | |
| 3313 inserted = XINT (insval); | |
| 3314 } | |
| 3315 } | |
| 2367 | 3316 END_GC_EXTERNAL_LIST_LOOP (p); |
| 428 | 3317 } |
| 3318 | |
| 3319 UNGCPRO; | |
| 3320 | |
| 3321 if (!NILP (val)) | |
| 3322 return (val); | |
| 3323 else | |
| 3324 return (list2 (filename, make_int (inserted))); | |
| 3325 } | |
| 3326 | |
| 3327 | |
| 3328 static int a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3329 Lisp_Object *annot); | |
| 3330 static Lisp_Object build_annotations (Lisp_Object start, Lisp_Object end); | |
| 3331 | |
| 3332 /* If build_annotations switched buffers, switch back to BUF. | |
| 3333 Kill the temporary buffer that was selected in the meantime. */ | |
| 3334 | |
| 3335 static Lisp_Object | |
| 3336 build_annotations_unwind (Lisp_Object buf) | |
| 3337 { | |
| 3338 Lisp_Object tembuf; | |
| 3339 | |
| 3340 if (XBUFFER (buf) == current_buffer) | |
| 3341 return Qnil; | |
| 3342 tembuf = Fcurrent_buffer (); | |
| 3343 Fset_buffer (buf); | |
| 3344 Fkill_buffer (tembuf); | |
| 3345 return Qnil; | |
| 3346 } | |
| 3347 | |
| 4266 | 3348 DEFUN ("write-region-internal", Fwrite_region_internal, 3, 8, |
| 428 | 3349 "r\nFWrite region to file: ", /* |
| 3350 Write current region into specified file; no coding-system frobbing. | |
| 4266 | 3351 |
| 3352 This function is almost identical to `write-region'; see that function for | |
| 3353 documentation of the START, END, FILENAME, APPEND, VISIT, and LOCKNAME | |
| 3354 arguments. CODESYS specifies the encoding to be used for the file; if it is | |
| 3355 nil, no code conversion occurs. (With `write-region' the coding system is | |
| 3356 determined automatically if not specified.) | |
| 3357 | |
| 3358 MUSTBENEW specifies that a check for an existing file of the same name | |
| 3359 should be made. If it is 'excl, XEmacs will error on detecting such a file | |
| 3360 and never write it. If it is some other non-nil value, the user will be | |
| 3361 prompted to confirm the overwriting of an existing file. If it is nil, | |
| 3362 existing files are silently overwritten when file system permissions allow | |
| 3363 this. | |
| 764 | 3364 |
| 3365 As a special kludge to support auto-saving, when START is nil START and | |
| 3366 END are set to the beginning and end, respectively, of the buffer, | |
| 3367 regardless of any restrictions. Don't use this feature. It is documented | |
| 3368 here because write-region handler writers need to be aware of it. | |
| 4266 | 3369 |
| 428 | 3370 */ |
| 4266 | 3371 (start, end, filename, append, visit, lockname, codesys, |
| 3372 mustbenew)) | |
| 428 | 3373 { |
| 442 | 3374 /* This function can call lisp. GC checked 2000-07-28 ben */ |
| 428 | 3375 int desc; |
| 3376 int failure; | |
| 3377 int save_errno = 0; | |
| 3378 struct stat st; | |
| 442 | 3379 Lisp_Object fn = Qnil; |
| 428 | 3380 int speccount = specpdl_depth (); |
| 3381 int visiting_other = STRINGP (visit); | |
| 3382 int visiting = (EQ (visit, Qt) || visiting_other); | |
| 3383 int quietly = (!visiting && !NILP (visit)); | |
| 3384 Lisp_Object visit_file = Qnil; | |
| 3385 Lisp_Object annotations = Qnil; | |
| 3386 struct buffer *given_buffer; | |
| 665 | 3387 Charbpos start1, end1; |
| 442 | 3388 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3389 struct gcpro ngcpro1, ngcpro2; | |
| 793 | 3390 Lisp_Object curbuf = wrap_buffer (current_buffer); |
| 3391 | |
| 442 | 3392 |
| 3393 /* start, end, visit, and append are never modified in this fun | |
| 3394 so we don't protect them. */ | |
| 3395 GCPRO5 (visit_file, filename, codesys, lockname, annotations); | |
| 3396 NGCPRO2 (curbuf, fn); | |
| 3397 | |
| 3398 /* [[ dmoore - if Fexpand_file_name or handlers kill the buffer, | |
| 428 | 3399 we should signal an error rather than blissfully continuing |
| 3400 along. ARGH, this function is going to lose lose lose. We need | |
| 3401 to protect the current_buffer from being destroyed, but the | |
| 442 | 3402 multiple return points make this a pain in the butt. ]] we do |
| 3403 protect curbuf now. --ben */ | |
| 428 | 3404 |
| 771 | 3405 codesys = get_coding_system_for_text_file (codesys, 0); |
| 428 | 3406 |
| 3407 if (current_buffer->base_buffer && ! NILP (visit)) | |
| 442 | 3408 invalid_operation ("Cannot do file visiting in an indirect buffer", |
| 3409 curbuf); | |
| 428 | 3410 |
| 3411 if (!NILP (start) && !STRINGP (start)) | |
| 3412 get_buffer_range_char (current_buffer, start, end, &start1, &end1, 0); | |
| 3413 | |
| 3414 { | |
| 3415 Lisp_Object handler; | |
| 3416 | |
| 4266 | 3417 if (!NILP (mustbenew) && !EQ (mustbenew, Qexcl)) |
| 3418 barf_or_query_if_file_exists (filename, "overwrite", 1, NULL); | |
| 3419 | |
| 428 | 3420 if (visiting_other) |
| 3421 visit_file = Fexpand_file_name (visit, Qnil); | |
| 3422 else | |
| 3423 visit_file = filename; | |
| 3424 filename = Fexpand_file_name (filename, Qnil); | |
| 3425 | |
| 3426 if (NILP (lockname)) | |
| 3427 lockname = visit_file; | |
| 3428 | |
| 442 | 3429 /* We used to UNGCPRO here. BAD! visit_file is used below after |
| 3430 more Lisp calling. */ | |
| 428 | 3431 /* If the file name has special constructs in it, |
| 3432 call the corresponding file handler. */ | |
| 3433 handler = Ffind_file_name_handler (filename, Qwrite_region); | |
| 3434 /* If FILENAME has no handler, see if VISIT has one. */ | |
| 3435 if (NILP (handler) && STRINGP (visit)) | |
| 3436 handler = Ffind_file_name_handler (visit, Qwrite_region); | |
| 3437 | |
| 3438 if (!NILP (handler)) | |
| 3439 { | |
| 3440 Lisp_Object val = call8 (handler, Qwrite_region, start, end, | |
| 3441 filename, append, visit, lockname, codesys); | |
| 3442 if (visiting) | |
| 3443 { | |
| 3444 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3445 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3446 current_buffer->filename = visit_file; | |
| 3447 MARK_MODELINE_CHANGED; | |
| 3448 } | |
| 442 | 3449 NUNGCPRO; |
| 3450 UNGCPRO; | |
| 428 | 3451 return val; |
| 3452 } | |
| 3453 } | |
| 3454 | |
| 3455 #ifdef CLASH_DETECTION | |
| 3456 if (!auto_saving) | |
| 442 | 3457 lock_file (lockname); |
| 428 | 3458 #endif /* CLASH_DETECTION */ |
| 3459 | |
| 3460 /* Special kludge to simplify auto-saving. */ | |
| 3461 if (NILP (start)) | |
| 3462 { | |
| 3463 start1 = BUF_BEG (current_buffer); | |
| 3464 end1 = BUF_Z (current_buffer); | |
| 3465 } | |
| 3466 | |
| 3467 record_unwind_protect (build_annotations_unwind, Fcurrent_buffer ()); | |
| 3468 | |
| 3469 given_buffer = current_buffer; | |
| 3470 annotations = build_annotations (start, end); | |
| 3471 if (current_buffer != given_buffer) | |
| 3472 { | |
| 3473 start1 = BUF_BEGV (current_buffer); | |
| 3474 end1 = BUF_ZV (current_buffer); | |
| 3475 } | |
| 3476 | |
| 3477 fn = filename; | |
| 3478 desc = -1; | |
| 3479 if (!NILP (append)) | |
| 3480 { | |
| 4266 | 3481 desc = qxe_open (XSTRING_DATA (fn), O_WRONLY | OPEN_BINARY |
| 3482 | (EQ (mustbenew, Qexcl) ? O_EXCL : 0), 0); | |
| 428 | 3483 } |
| 3484 if (desc < 0) | |
| 3485 { | |
| 771 | 3486 desc = qxe_open (XSTRING_DATA (fn), |
| 4266 | 3487 O_WRONLY | (EQ (mustbenew, Qexcl) ? O_EXCL : O_TRUNC) |
| 3488 | O_CREAT | OPEN_BINARY, | |
| 771 | 3489 auto_saving ? auto_save_mode_bits : CREAT_MODE); |
| 428 | 3490 } |
| 3491 | |
| 3492 if (desc < 0) | |
| 3493 { | |
| 3494 #ifdef CLASH_DETECTION | |
| 3495 save_errno = errno; | |
| 3496 if (!auto_saving) unlock_file (lockname); | |
| 3497 errno = save_errno; | |
| 3498 #endif /* CLASH_DETECTION */ | |
| 563 | 3499 report_file_error ("Opening output file", filename); |
| 428 | 3500 } |
| 3501 | |
| 3502 { | |
| 3503 Lisp_Object desc_locative = Fcons (make_int (desc), Qnil); | |
| 3504 Lisp_Object instream = Qnil, outstream = Qnil; | |
| 442 | 3505 struct gcpro nngcpro1, nngcpro2; |
| 3506 NNGCPRO2 (instream, outstream); | |
| 428 | 3507 |
| 3508 record_unwind_protect (close_file_unwind, desc_locative); | |
| 3509 | |
| 3510 if (!NILP (append)) | |
| 3511 { | |
| 3512 if (lseek (desc, 0, 2) < 0) | |
| 3513 { | |
| 3514 #ifdef CLASH_DETECTION | |
| 3515 if (!auto_saving) unlock_file (lockname); | |
| 3516 #endif /* CLASH_DETECTION */ | |
| 3517 report_file_error ("Lseek error", | |
| 563 | 3518 filename); |
| 428 | 3519 } |
| 3520 } | |
| 3521 | |
| 3522 failure = 0; | |
| 3523 | |
| 3524 /* Note: I tried increasing the buffering size, along with | |
| 3525 various other tricks, but nothing seemed to make much of | |
| 3526 a difference in the time it took to save a large file. | |
| 3527 (Actually that's not true. With a local disk, changing | |
| 3528 the buffer size doesn't seem to make much difference. | |
| 3529 With an NFS-mounted disk, it could make a lot of difference | |
| 3530 because you're affecting the number of network requests | |
| 3531 that need to be made, and there could be a large latency | |
| 3532 for each request. So I've increased the buffer size | |
| 3533 to 64K.) */ | |
| 3534 outstream = make_filedesc_output_stream (desc, 0, -1, 0); | |
| 3535 Lstream_set_buffering (XLSTREAM (outstream), | |
| 3536 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3537 outstream = | |
| 800 | 3538 make_coding_output_stream (XLSTREAM (outstream), codesys, |
| 3539 CODING_ENCODE, 0); | |
| 428 | 3540 Lstream_set_buffering (XLSTREAM (outstream), |
| 3541 LSTREAM_BLOCKN_BUFFERED, 65536); | |
| 3542 if (STRINGP (start)) | |
| 3543 { | |
| 3544 instream = make_lisp_string_input_stream (start, 0, -1); | |
| 3545 start1 = 0; | |
| 3546 } | |
| 3547 else | |
| 3548 instream = make_lisp_buffer_input_stream (current_buffer, start1, end1, | |
| 3549 LSTR_SELECTIVE | | |
| 3550 LSTR_IGNORE_ACCESSIBLE); | |
| 3551 failure = (0 > (a_write (outstream, instream, start1, | |
| 3552 &annotations))); | |
| 3553 save_errno = errno; | |
| 3554 /* Note that this doesn't close the desc since we created the | |
| 3555 stream without the LSTR_CLOSING flag, but it does | |
| 3556 flush out any buffered data. */ | |
| 3557 if (Lstream_close (XLSTREAM (outstream)) < 0) | |
| 3558 { | |
| 3559 failure = 1; | |
| 3560 save_errno = errno; | |
| 3561 } | |
| 3562 Lstream_close (XLSTREAM (instream)); | |
| 3563 | |
| 3564 #ifdef HAVE_FSYNC | |
| 3565 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). | |
| 3566 Disk full in NFS may be reported here. */ | |
| 3567 /* mib says that closing the file will try to write as fast as NFS can do | |
| 3568 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
|
3569 if (!auto_saving && !write_region_inhibit_fsync && fsync (desc) < 0 |
| 428 | 3570 /* If fsync fails with EINTR, don't treat that as serious. */ |
| 3571 && errno != EINTR) | |
| 3572 { | |
| 3573 failure = 1; | |
| 3574 save_errno = errno; | |
| 3575 } | |
| 3576 #endif /* HAVE_FSYNC */ | |
| 3577 | |
| 440 | 3578 /* Spurious "file has changed on disk" warnings used to be seen on |
| 3579 systems where close() can change the modtime. This is known to | |
| 3580 happen on various NFS file systems, on Windows, and on Linux. | |
| 3581 Rather than handling this on a per-system basis, we | |
| 771 | 3582 unconditionally do the qxe_stat() after the retry_close(). */ |
| 428 | 3583 |
| 3584 /* NFS can report a write failure now. */ | |
| 771 | 3585 if (retry_close (desc) < 0) |
| 428 | 3586 { |
| 3587 failure = 1; | |
| 3588 save_errno = errno; | |
| 3589 } | |
| 3590 | |
| 3591 /* Discard the close unwind-protect. Execute the one for | |
| 3592 build_annotations (switches back to the original current buffer | |
| 3593 as necessary). */ | |
| 3594 XCAR (desc_locative) = Qnil; | |
| 771 | 3595 unbind_to (speccount); |
| 442 | 3596 |
| 3597 NNUNGCPRO; | |
| 428 | 3598 } |
| 3599 | |
| 771 | 3600 qxe_stat (XSTRING_DATA (fn), &st); |
| 428 | 3601 |
| 3602 #ifdef CLASH_DETECTION | |
| 3603 if (!auto_saving) | |
| 3604 unlock_file (lockname); | |
| 3605 #endif /* CLASH_DETECTION */ | |
| 3606 | |
| 3607 /* Do this before reporting IO error | |
| 3608 to avoid a "file has changed on disk" warning on | |
| 3609 next attempt to save. */ | |
| 3610 if (visiting) | |
| 3611 current_buffer->modtime = st.st_mtime; | |
| 3612 | |
| 3613 if (failure) | |
| 442 | 3614 { |
| 3615 errno = save_errno; | |
| 563 | 3616 report_file_error ("Writing file", fn); |
| 442 | 3617 } |
| 428 | 3618 |
| 3619 if (visiting) | |
| 3620 { | |
| 3621 BUF_SAVE_MODIFF (current_buffer) = BUF_MODIFF (current_buffer); | |
| 3622 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 3623 current_buffer->filename = visit_file; | |
| 3624 MARK_MODELINE_CHANGED; | |
| 3625 } | |
| 3626 else if (quietly) | |
| 3627 { | |
| 442 | 3628 NUNGCPRO; |
| 3629 UNGCPRO; | |
| 428 | 3630 return Qnil; |
| 3631 } | |
| 3632 | |
| 3633 if (!auto_saving) | |
| 3634 { | |
| 3635 if (visiting_other) | |
| 3636 message ("Wrote %s", XSTRING_DATA (visit_file)); | |
| 3637 else | |
| 3638 { | |
| 446 | 3639 Lisp_Object fsp = Qnil; |
| 442 | 3640 struct gcpro nngcpro1; |
| 3641 | |
| 3642 NNGCPRO1 (fsp); | |
| 428 | 3643 fsp = Ffile_symlink_p (fn); |
| 3644 if (NILP (fsp)) | |
| 3645 message ("Wrote %s", XSTRING_DATA (fn)); | |
| 3646 else | |
| 3647 message ("Wrote %s (symlink to %s)", | |
| 3648 XSTRING_DATA (fn), XSTRING_DATA (fsp)); | |
| 442 | 3649 NNUNGCPRO; |
| 428 | 3650 } |
| 3651 } | |
| 442 | 3652 NUNGCPRO; |
| 3653 UNGCPRO; | |
| 428 | 3654 return Qnil; |
| 3655 } | |
| 3656 | |
| 3657 /* #### This is such a load of shit!!!! There is no way we should define | |
| 3658 something so stupid as a subr, just sort the fucking list more | |
| 3659 intelligently. */ | |
| 3660 DEFUN ("car-less-than-car", Fcar_less_than_car, 2, 2, 0, /* | |
| 3661 Return t if (car A) is numerically less than (car B). | |
| 3662 */ | |
| 3663 (a, b)) | |
| 3664 { | |
| 3665 Lisp_Object objs[2]; | |
| 3666 objs[0] = Fcar (a); | |
| 3667 objs[1] = Fcar (b); | |
| 3668 return Flss (2, objs); | |
| 3669 } | |
| 3670 | |
| 3671 /* Heh heh heh, let's define this too, just to aggravate the person who | |
| 3672 wrote the above comment. */ | |
| 3673 DEFUN ("cdr-less-than-cdr", Fcdr_less_than_cdr, 2, 2, 0, /* | |
| 3674 Return t if (cdr A) is numerically less than (cdr B). | |
| 3675 */ | |
| 3676 (a, b)) | |
| 3677 { | |
| 3678 Lisp_Object objs[2]; | |
| 3679 objs[0] = Fcdr (a); | |
| 3680 objs[1] = Fcdr (b); | |
| 3681 return Flss (2, objs); | |
| 3682 } | |
| 3683 | |
| 3684 /* Build the complete list of annotations appropriate for writing out | |
| 3685 the text between START and END, by calling all the functions in | |
| 3686 write-region-annotate-functions and merging the lists they return. | |
| 3687 If one of these functions switches to a different buffer, we assume | |
| 3688 that buffer contains altered text. Therefore, the caller must | |
| 3689 make sure to restore the current buffer in all cases, | |
| 3690 as save-excursion would do. */ | |
| 3691 | |
| 3692 static Lisp_Object | |
| 3693 build_annotations (Lisp_Object start, Lisp_Object end) | |
| 3694 { | |
| 3695 /* This function can GC */ | |
| 3696 Lisp_Object annotations; | |
| 3697 Lisp_Object p, res; | |
| 3698 struct gcpro gcpro1, gcpro2; | |
| 793 | 3699 Lisp_Object original_buffer = wrap_buffer (current_buffer); |
| 3700 | |
| 428 | 3701 |
| 3702 annotations = Qnil; | |
| 3703 p = Vwrite_region_annotate_functions; | |
| 3704 GCPRO2 (annotations, p); | |
| 3705 while (!NILP (p)) | |
| 3706 { | |
| 3707 struct buffer *given_buffer = current_buffer; | |
| 3708 Vwrite_region_annotations_so_far = annotations; | |
| 3709 res = call2 (Fcar (p), start, end); | |
| 3710 /* If the function makes a different buffer current, | |
| 3711 assume that means this buffer contains altered text to be output. | |
| 3712 Reset START and END from the buffer bounds | |
| 3713 and discard all previous annotations because they should have | |
| 3714 been dealt with by this function. */ | |
| 3715 if (current_buffer != given_buffer) | |
| 3716 { | |
| 3717 start = make_int (BUF_BEGV (current_buffer)); | |
| 3718 end = make_int (BUF_ZV (current_buffer)); | |
| 3719 annotations = Qnil; | |
| 3720 } | |
| 3721 Flength (res); /* Check basic validity of return value */ | |
| 3722 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3723 p = Fcdr (p); | |
| 3724 } | |
| 3725 | |
| 3726 /* Now do the same for annotation functions implied by the file-format */ | |
| 3727 if (auto_saving && (!EQ (Vauto_save_file_format, Qt))) | |
| 3728 p = Vauto_save_file_format; | |
| 3729 else | |
| 3730 p = current_buffer->file_format; | |
| 3731 while (!NILP (p)) | |
| 3732 { | |
| 3733 struct buffer *given_buffer = current_buffer; | |
| 3734 Vwrite_region_annotations_so_far = annotations; | |
| 3735 res = call4 (Qformat_annotate_function, Fcar (p), start, end, | |
| 3736 original_buffer); | |
| 3737 if (current_buffer != given_buffer) | |
| 3738 { | |
| 3739 start = make_int (BUF_BEGV (current_buffer)); | |
| 3740 end = make_int (BUF_ZV (current_buffer)); | |
| 3741 annotations = Qnil; | |
| 3742 } | |
| 3743 Flength (res); | |
| 3744 annotations = merge (annotations, res, Qcar_less_than_car); | |
| 3745 p = Fcdr (p); | |
| 3746 } | |
| 3747 UNGCPRO; | |
| 3748 return annotations; | |
| 3749 } | |
| 3750 | |
| 3751 /* Write to stream OUTSTREAM the characters from INSTREAM (it is read until | |
| 3752 EOF is encountered), assuming they start at position POS in the buffer | |
| 3753 of string that STREAM refers to. Intersperse with them the annotations | |
| 3754 from *ANNOT that fall into the range of positions we are reading from, | |
| 3755 each at its appropriate position. | |
| 3756 | |
| 3757 Modify *ANNOT by discarding elements as we output them. | |
| 3758 The return value is negative in case of system call failure. */ | |
| 3759 | |
| 3760 /* 4K should probably be fine. We just need to reduce the number of | |
| 3761 function calls to reasonable level. The Lstream stuff itself will | |
| 3762 batch to 64K to reduce the number of system calls. */ | |
| 3763 | |
| 3764 #define A_WRITE_BATCH_SIZE 4096 | |
| 3765 | |
| 3766 static int | |
| 3767 a_write (Lisp_Object outstream, Lisp_Object instream, int pos, | |
| 3768 Lisp_Object *annot) | |
| 3769 { | |
| 3770 Lisp_Object tem; | |
| 3771 int nextpos; | |
| 3772 unsigned char largebuf[A_WRITE_BATCH_SIZE]; | |
| 3773 Lstream *instr = XLSTREAM (instream); | |
| 3774 Lstream *outstr = XLSTREAM (outstream); | |
| 3775 | |
| 3776 while (LISTP (*annot)) | |
| 3777 { | |
| 3778 tem = Fcar_safe (Fcar (*annot)); | |
| 3779 if (INTP (tem)) | |
| 3780 nextpos = XINT (tem); | |
| 3781 else | |
| 3782 nextpos = INT_MAX; | |
| 3783 #ifdef MULE | |
| 3784 /* If there are annotations left and we have Mule, then we | |
| 867 | 3785 have to do the I/O one ichar at a time so we can |
| 428 | 3786 determine when to insert the annotation. */ |
| 3787 if (!NILP (*annot)) | |
| 3788 { | |
| 867 | 3789 Ichar ch; |
| 3790 while (pos != nextpos && (ch = Lstream_get_ichar (instr)) != EOF) | |
| 428 | 3791 { |
| 867 | 3792 if (Lstream_put_ichar (outstr, ch) < 0) |
| 428 | 3793 return -1; |
| 3794 pos++; | |
| 3795 } | |
| 3796 } | |
| 3797 else | |
| 3798 #endif /* MULE */ | |
| 3799 { | |
| 3800 while (pos != nextpos) | |
| 3801 { | |
| 3802 /* Otherwise there is no point to that. Just go in batches. */ | |
| 3803 int chunk = min (nextpos - pos, A_WRITE_BATCH_SIZE); | |
| 3804 | |
| 3805 chunk = Lstream_read (instr, largebuf, chunk); | |
| 3806 if (chunk < 0) | |
| 3807 return -1; | |
| 3808 if (chunk == 0) /* EOF */ | |
| 3809 break; | |
| 771 | 3810 if (Lstream_write (outstr, largebuf, chunk) < 0) |
| 428 | 3811 return -1; |
| 3812 pos += chunk; | |
| 3813 } | |
| 3814 } | |
| 3815 if (pos == nextpos) | |
| 3816 { | |
| 3817 tem = Fcdr (Fcar (*annot)); | |
| 3818 if (STRINGP (tem)) | |
| 3819 { | |
| 3820 if (Lstream_write (outstr, XSTRING_DATA (tem), | |
| 3821 XSTRING_LENGTH (tem)) < 0) | |
| 3822 return -1; | |
| 3823 } | |
| 3824 *annot = Fcdr (*annot); | |
| 3825 } | |
| 3826 else | |
| 3827 return 0; | |
| 3828 } | |
| 3829 return -1; | |
| 3830 } | |
| 3831 | |
| 3832 | |
| 3833 | |
| 3834 #if 0 | |
| 3835 #include <des_crypt.h> | |
| 3836 | |
| 3837 #define CRYPT_BLOCK_SIZE 8 /* bytes */ | |
| 3838 #define CRYPT_KEY_SIZE 8 /* bytes */ | |
| 3839 | |
| 3840 DEFUN ("encrypt-string", Fencrypt_string, 2, 2, 0, /* | |
| 3841 Encrypt STRING using KEY. | |
| 3842 */ | |
| 3843 (string, key)) | |
| 3844 { | |
| 2367 | 3845 /* !!#### Needs work */ |
| 1333 | 3846 Extbyte *encrypted_string, *raw_key; |
| 3847 Extbyte *string_ext, *key_ext; | |
| 3848 Bytecount string_size_ext, key_size_ext, rounded_size, extra, key_size; | |
| 3849 | |
| 428 | 3850 CHECK_STRING (string); |
| 3851 CHECK_STRING (key); | |
| 3852 | |
| 1333 | 3853 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3854 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3855 | |
| 3856 extra = string_size_ext % CRYPT_BLOCK_SIZE; | |
| 3857 rounded_size = string_size_ext + extra; | |
| 851 | 3858 encrypted_string = ALLOCA (rounded_size + 1); |
| 1333 | 3859 memcpy (encrypted_string, string_ext, string_size_ext); |
| 428 | 3860 memset (encrypted_string + rounded_size - extra, 0, extra + 1); |
| 3861 | |
| 1333 | 3862 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3863 |
| 851 | 3864 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3865 memcpy (raw_key, key_ext, key_size); |
| 428 | 3866 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3867 | |
| 3868 ecb_crypt (raw_key, encrypted_string, rounded_size, | |
| 3869 DES_ENCRYPT | DES_SW); | |
| 1333 | 3870 return make_ext_string (encrypted_string, rounded_size, Qbinary); |
| 428 | 3871 } |
| 3872 | |
| 3873 DEFUN ("decrypt-string", Fdecrypt_string, 2, 2, 0, /* | |
| 3874 Decrypt STRING using KEY. | |
| 3875 */ | |
| 3876 (string, key)) | |
| 3877 { | |
| 1333 | 3878 Extbyte *decrypted_string, *raw_key; |
| 3879 Extbyte *string_ext, *key_ext; | |
| 3880 Bytecount string_size_ext, key_size_ext, string_size, key_size; | |
| 428 | 3881 |
| 3882 CHECK_STRING (string); | |
| 3883 CHECK_STRING (key); | |
| 3884 | |
| 1333 | 3885 LISP_STRING_TO_SIZED_EXTERNAL (string, string_ext, string_size_ext, Qbinary); |
| 3886 LISP_STRING_TO_SIZED_EXTERNAL (key, key_ext, key_size_ext, Qbinary); | |
| 3887 | |
| 3888 string_size = string_size_ext + 1; | |
| 851 | 3889 decrypted_string = ALLOCA (string_size); |
| 1333 | 3890 memcpy (decrypted_string, string_ext, string_size); |
| 428 | 3891 decrypted_string[string_size - 1] = '\0'; |
| 3892 | |
| 1333 | 3893 key_size = min (CRYPT_KEY_SIZE, key_size_ext); |
| 428 | 3894 |
| 851 | 3895 raw_key = ALLOCA (CRYPT_KEY_SIZE + 1); |
| 1333 | 3896 memcpy (raw_key, key_ext, key_size); |
| 428 | 3897 memset (raw_key + key_size, 0, (CRYPT_KEY_SIZE + 1) - key_size); |
| 3898 | |
| 3899 | |
| 3900 ecb_crypt (raw_key, decrypted_string, string_size, D | DES_SW); | |
| 1333 | 3901 return make_ext_string (decrypted_string, string_size - 1, Qbinary); |
| 428 | 3902 } |
| 3903 #endif /* 0 */ | |
| 3904 | |
| 3905 | |
| 3906 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, 1, 1, 0, /* | |
| 444 | 3907 Return t if last mod time of BUFFER's visited file matches what BUFFER records. |
| 428 | 3908 This means that the file has not been changed since it was visited or saved. |
| 3909 */ | |
| 444 | 3910 (buffer)) |
| 428 | 3911 { |
| 442 | 3912 /* This function can call lisp; GC checked 2000-07-11 ben */ |
| 428 | 3913 struct buffer *b; |
| 3914 struct stat st; | |
| 3915 Lisp_Object handler; | |
| 3916 | |
| 444 | 3917 CHECK_BUFFER (buffer); |
| 3918 b = XBUFFER (buffer); | |
| 428 | 3919 |
| 3920 if (!STRINGP (b->filename)) return Qt; | |
| 3921 if (b->modtime == 0) return Qt; | |
| 3922 | |
| 3923 /* If the file name has special constructs in it, | |
| 3924 call the corresponding file handler. */ | |
| 3925 handler = Ffind_file_name_handler (b->filename, | |
| 3926 Qverify_visited_file_modtime); | |
| 3927 if (!NILP (handler)) | |
| 444 | 3928 return call2 (handler, Qverify_visited_file_modtime, buffer); |
| 428 | 3929 |
| 771 | 3930 if (qxe_stat (XSTRING_DATA (b->filename), &st) < 0) |
| 428 | 3931 { |
| 3932 /* If the file doesn't exist now and didn't exist before, | |
| 3933 we say that it isn't modified, provided the error is a tame one. */ | |
| 3934 if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
| 3935 st.st_mtime = -1; | |
| 3936 else | |
| 3937 st.st_mtime = 0; | |
| 3938 } | |
| 3939 if (st.st_mtime == b->modtime | |
| 3940 /* If both are positive, accept them if they are off by one second. */ | |
| 3941 || (st.st_mtime > 0 && b->modtime > 0 | |
| 3942 && (st.st_mtime == b->modtime + 1 | |
| 3943 || st.st_mtime == b->modtime - 1))) | |
| 3944 return Qt; | |
| 3945 return Qnil; | |
| 3946 } | |
| 3947 | |
| 3948 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, 0, 0, 0, /* | |
| 3949 Clear out records of last mod time of visited file. | |
| 3950 Next attempt to save will certainly not complain of a discrepancy. | |
| 3951 */ | |
| 3952 ()) | |
| 3953 { | |
| 3954 current_buffer->modtime = 0; | |
| 3955 return Qnil; | |
| 3956 } | |
| 3957 | |
| 3958 DEFUN ("visited-file-modtime", Fvisited_file_modtime, 0, 0, 0, /* | |
| 3959 Return the current buffer's recorded visited file modification time. | |
| 3960 The value is a list of the form (HIGH . LOW), like the time values | |
| 3961 that `file-attributes' returns. | |
| 3962 */ | |
| 3963 ()) | |
| 3964 { | |
| 3965 return time_to_lisp ((time_t) current_buffer->modtime); | |
| 3966 } | |
| 3967 | |
| 3968 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, 0, 1, 0, /* | |
| 3969 Update buffer's recorded modification time from the visited file's time. | |
| 3970 Useful if the buffer was not read from the file normally | |
| 3971 or if the file itself has been changed for some known benign reason. | |
| 3972 An argument specifies the modification time value to use | |
| 3973 \(instead of that of the visited file), in the form of a list | |
| 3974 \(HIGH . LOW) or (HIGH LOW). | |
| 3975 */ | |
| 3976 (time_list)) | |
| 3977 { | |
| 3978 /* This function can call lisp */ | |
| 3979 if (!NILP (time_list)) | |
| 3980 { | |
| 3981 time_t the_time; | |
| 3982 lisp_to_time (time_list, &the_time); | |
| 3983 current_buffer->modtime = (int) the_time; | |
| 3984 } | |
| 3985 else | |
| 3986 { | |
| 446 | 3987 Lisp_Object filename = Qnil; |
| 428 | 3988 struct stat st; |
| 3989 Lisp_Object handler; | |
| 3990 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 3991 | |
| 3992 GCPRO3 (filename, time_list, current_buffer->filename); | |
| 3993 filename = Fexpand_file_name (current_buffer->filename, Qnil); | |
| 3994 | |
| 3995 /* If the file name has special constructs in it, | |
| 3996 call the corresponding file handler. */ | |
| 3997 handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); | |
| 3998 UNGCPRO; | |
| 3999 if (!NILP (handler)) | |
| 4000 /* The handler can find the file name the same way we did. */ | |
| 4001 return call2 (handler, Qset_visited_file_modtime, Qnil); | |
| 771 | 4002 else if (qxe_stat (XSTRING_DATA (filename), &st) >= 0) |
| 428 | 4003 current_buffer->modtime = st.st_mtime; |
| 4004 } | |
| 4005 | |
| 4006 return Qnil; | |
| 4007 } | |
| 4008 | |
| 4009 static Lisp_Object | |
| 2286 | 4010 auto_save_error (Lisp_Object UNUSED (condition_object), |
| 4011 Lisp_Object UNUSED (ignored)) | |
| 428 | 4012 { |
| 4013 /* This function can call lisp */ | |
| 4014 if (gc_in_progress) | |
| 4015 return Qnil; | |
| 4016 /* Don't try printing an error message after everything is gone! */ | |
| 4017 if (preparing_for_armageddon) | |
| 4018 return Qnil; | |
| 4019 clear_echo_area (selected_frame (), Qauto_saving, 1); | |
| 4020 Fding (Qt, Qauto_save_error, Qnil); | |
| 4021 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 4022 Fsleep_for (make_int (1)); | |
| 4023 message ("Auto-saving...error!for %s", XSTRING_DATA (current_buffer->name)); | |
| 4024 Fsleep_for (make_int (1)); | |
| 4025 message ("Auto-saving...error for %s", XSTRING_DATA (current_buffer->name)); | |
| 4026 Fsleep_for (make_int (1)); | |
| 4027 return Qnil; | |
| 4028 } | |
| 4029 | |
| 4030 static Lisp_Object | |
| 2286 | 4031 auto_save_1 (Lisp_Object UNUSED (ignored)) |
| 428 | 4032 { |
| 4033 /* This function can call lisp */ | |
| 4034 /* #### I think caller is protecting current_buffer? */ | |
| 4035 struct stat st; | |
| 4036 Lisp_Object fn = current_buffer->filename; | |
| 4037 Lisp_Object a = current_buffer->auto_save_file_name; | |
| 4038 | |
| 4039 if (!STRINGP (a)) | |
| 4040 return (Qnil); | |
| 4041 | |
| 4042 /* Get visited file's mode to become the auto save file's mode. */ | |
| 4043 if (STRINGP (fn) && | |
| 771 | 4044 qxe_stat (XSTRING_DATA (fn), &st) >= 0) |
| 428 | 4045 /* But make sure we can overwrite it later! */ |
| 4046 auto_save_mode_bits = st.st_mode | 0600; | |
| 4047 else | |
| 4048 /* default mode for auto-save files of buffers with no file is | |
| 4049 readable by owner only. This may annoy some small number of | |
| 4050 people, but the alternative removes all privacy from email. */ | |
| 4051 auto_save_mode_bits = 0600; | |
| 4052 | |
| 4053 return | |
| 4054 Fwrite_region_internal (Qnil, Qnil, a, Qnil, Qlambda, Qnil, | |
| 771 | 4055 #if 1 /* #### Kyle wants it changed to not use escape-quoted. Think |
| 4056 carefully about how this works. */ | |
| 4266 | 4057 Qescape_quoted, |
| 771 | 4058 #else |
| 4266 | 4059 current_buffer->buffer_file_coding_system, |
| 428 | 4060 #endif |
| 4266 | 4061 Qnil); |
| 428 | 4062 } |
| 4063 | |
| 4064 static Lisp_Object | |
| 2286 | 4065 auto_save_expand_name_error (Lisp_Object condition_object, |
| 4066 Lisp_Object UNUSED (ignored)) | |
| 428 | 4067 { |
| 771 | 4068 warn_when_safe_lispobj |
| 793 | 4069 (Qfile, Qerror, |
| 771 | 4070 Fcons (build_msg_string ("Invalid auto-save list-file"), |
| 4071 Fcons (Vauto_save_list_file_name, | |
| 4072 condition_object))); | |
| 428 | 4073 return Qnil; |
| 4074 } | |
| 4075 | |
| 4076 static Lisp_Object | |
| 4077 auto_save_expand_name (Lisp_Object name) | |
| 4078 { | |
| 4079 struct gcpro gcpro1; | |
| 4080 | |
| 4081 /* note that caller did NOT gc protect name, so we do it. */ | |
| 771 | 4082 /* [[dmoore - this might not be necessary, if condition_case_1 |
| 4083 protects it. but I don't think it does.]] indeed it doesn't. --ben */ | |
| 428 | 4084 GCPRO1 (name); |
| 4085 RETURN_UNGCPRO (Fexpand_file_name (name, Qnil)); | |
| 4086 } | |
| 4087 | |
| 4088 | |
| 4089 static Lisp_Object | |
| 4090 do_auto_save_unwind (Lisp_Object fd) | |
| 4091 { | |
| 771 | 4092 retry_close (XINT (fd)); |
| 428 | 4093 return (fd); |
| 4094 } | |
| 4095 | |
| 4096 /* Fdo_auto_save() checks whether a GC is in progress when it is called, | |
| 4097 and if so, tries to avoid touching lisp objects. | |
| 4098 | |
| 4099 The only time that Fdo_auto_save() is called while GC is in progress | |
| 2500 | 4100 is if we're going down, as a result of an ABORT() or a kill signal. |
| 428 | 4101 It's fairly important that we generate autosave files in that case! |
| 4102 */ | |
| 4103 | |
| 4104 DEFUN ("do-auto-save", Fdo_auto_save, 0, 2, "", /* | |
| 4105 Auto-save all buffers that need it. | |
| 4106 This is all buffers that have auto-saving enabled | |
| 4107 and are changed since last auto-saved. | |
| 4108 Auto-saving writes the buffer into a file | |
| 4109 so that your editing is not lost if the system crashes. | |
| 4110 This file is not the file you visited; that changes only when you save. | |
| 4111 Normally we run the normal hook `auto-save-hook' before saving. | |
| 4112 | |
| 4113 Non-nil first argument means do not print any message if successful. | |
| 4114 Non-nil second argument means save only current buffer. | |
| 4115 */ | |
| 4116 (no_message, current_only)) | |
| 4117 { | |
| 4118 /* This function can call lisp */ | |
| 4119 struct buffer *b; | |
| 4120 Lisp_Object tail, buf; | |
| 4121 int auto_saved = 0; | |
| 4122 int do_handled_files; | |
| 4123 Lisp_Object oquit = Qnil; | |
| 4124 Lisp_Object listfile = Qnil; | |
| 4125 Lisp_Object old; | |
| 4126 int listdesc = -1; | |
| 4127 int speccount = specpdl_depth (); | |
| 4128 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 4129 | |
| 793 | 4130 old = wrap_buffer (current_buffer); |
| 428 | 4131 GCPRO3 (oquit, listfile, old); |
| 4132 check_quit (); /* make Vquit_flag accurate */ | |
| 4133 /* Ordinarily don't quit within this function, | |
| 4134 but don't make it impossible to quit (in case we get hung in I/O). */ | |
| 4135 oquit = Vquit_flag; | |
| 4136 Vquit_flag = Qnil; | |
| 4137 | |
| 4138 /* No further GCPRO needed, because (when it matters) all Lisp_Object | |
| 4139 variables point to non-strings reached from Vbuffer_alist. */ | |
| 4140 | |
| 4141 if (minibuf_level != 0 || preparing_for_armageddon) | |
| 4142 no_message = Qt; | |
| 4143 | |
| 4144 run_hook (Qauto_save_hook); | |
| 4145 | |
| 4146 if (STRINGP (Vauto_save_list_file_name)) | |
| 4147 listfile = condition_case_1 (Qt, | |
| 4148 auto_save_expand_name, | |
| 4149 Vauto_save_list_file_name, | |
| 4150 auto_save_expand_name_error, Qnil); | |
| 4151 | |
| 853 | 4152 internal_bind_int (&auto_saving, 1); |
| 428 | 4153 |
| 4154 /* First, save all files which don't have handlers. If Emacs is | |
| 4155 crashing, the handlers may tweak what is causing Emacs to crash | |
| 4156 in the first place, and it would be a shame if Emacs failed to | |
| 4157 autosave perfectly ordinary files because it couldn't handle some | |
| 4158 ange-ftp'd file. */ | |
| 4159 for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
| 4160 { | |
| 4161 for (tail = Vbuffer_alist; | |
| 4162 CONSP (tail); | |
| 4163 tail = XCDR (tail)) | |
| 4164 { | |
| 4165 buf = XCDR (XCAR (tail)); | |
| 4166 b = XBUFFER (buf); | |
| 4167 | |
| 4168 if (!NILP (current_only) | |
| 4169 && b != current_buffer) | |
| 4170 continue; | |
| 4171 | |
| 4172 /* Don't auto-save indirect buffers. | |
| 4173 The base buffer takes care of it. */ | |
| 4174 if (b->base_buffer) | |
| 4175 continue; | |
| 4176 | |
| 4177 /* Check for auto save enabled | |
| 4178 and file changed since last auto save | |
| 4179 and file changed since last real save. */ | |
| 4180 if (STRINGP (b->auto_save_file_name) | |
| 4181 && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) | |
| 4182 && b->auto_save_modified < BUF_MODIFF (b) | |
| 4183 /* -1 means we've turned off autosaving for a while--see below. */ | |
| 4184 && XINT (b->saved_size) >= 0 | |
| 4185 && (do_handled_files | |
| 4186 || NILP (Ffind_file_name_handler (b->auto_save_file_name, | |
| 4187 Qwrite_region)))) | |
| 4188 { | |
| 4189 EMACS_TIME before_time, after_time; | |
| 4190 | |
| 4191 EMACS_GET_TIME (before_time); | |
| 4192 /* If we had a failure, don't try again for 20 minutes. */ | |
| 4193 if (!preparing_for_armageddon | |
| 4194 && b->auto_save_failure_time >= 0 | |
| 4195 && (EMACS_SECS (before_time) - b->auto_save_failure_time < | |
| 4196 1200)) | |
| 4197 continue; | |
| 4198 | |
| 4199 if (!preparing_for_armageddon && | |
| 4200 (XINT (b->saved_size) * 10 | |
| 4201 > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
| 4202 /* A short file is likely to change a large fraction; | |
| 4203 spare the user annoying messages. */ | |
| 4204 && XINT (b->saved_size) > 5000 | |
| 4205 /* These messages are frequent and annoying for `*mail*'. */ | |
| 4206 && !NILP (b->filename) | |
| 4207 && NILP (no_message) | |
| 4208 && disable_auto_save_when_buffer_shrinks) | |
| 4209 { | |
| 4210 /* It has shrunk too much; turn off auto-saving here. | |
| 4211 Unless we're about to crash, in which case auto-save it | |
| 4212 anyway. | |
| 4213 */ | |
| 4214 message | |
| 4215 ("Buffer %s has shrunk a lot; auto save turned off there", | |
| 4216 XSTRING_DATA (b->name)); | |
| 4217 /* Turn off auto-saving until there's a real save, | |
| 4218 and prevent any more warnings. */ | |
| 4219 b->saved_size = make_int (-1); | |
| 4220 if (!gc_in_progress) | |
| 4221 Fsleep_for (make_int (1)); | |
| 4222 continue; | |
| 4223 } | |
| 4224 set_buffer_internal (b); | |
| 4225 if (!auto_saved && NILP (no_message)) | |
| 4226 { | |
| 1333 | 4227 static const Ibyte *msg = (const Ibyte *) "Auto-saving..."; |
| 428 | 4228 echo_area_message (selected_frame (), msg, Qnil, |
| 1333 | 4229 0, qxestrlen (msg), |
| 428 | 4230 Qauto_saving); |
| 4231 } | |
| 4232 | |
| 4233 /* Open the auto-save list file, if necessary. | |
| 4234 We only do this now so that the file only exists | |
| 4235 if we actually auto-saved any files. */ | |
| 444 | 4236 if (!auto_saved && !inhibit_auto_save_session |
| 4237 && !NILP (Vauto_save_list_file_prefix) | |
| 4238 && STRINGP (listfile) && listdesc < 0) | |
| 428 | 4239 { |
| 771 | 4240 listdesc = |
| 4241 qxe_open (XSTRING_DATA (listfile), | |
| 4242 O_WRONLY | O_TRUNC | O_CREAT | OPEN_BINARY, | |
| 4243 CREAT_MODE); | |
| 428 | 4244 |
| 4245 /* Arrange to close that file whether or not we get | |
| 4246 an error. */ | |
| 4247 if (listdesc >= 0) | |
| 4248 record_unwind_protect (do_auto_save_unwind, | |
| 4249 make_int (listdesc)); | |
| 4250 } | |
| 4251 | |
| 4252 /* Record all the buffers that we are auto-saving in | |
| 4253 the special file that lists them. For each of | |
| 4254 these buffers, record visited name (if any) and | |
| 4255 auto save name. */ | |
| 4256 if (listdesc >= 0) | |
| 4257 { | |
| 442 | 4258 const Extbyte *auto_save_file_name_ext; |
| 665 | 4259 Bytecount auto_save_file_name_ext_len; |
| 428 | 4260 |
| 440 | 4261 TO_EXTERNAL_FORMAT (LISP_STRING, b->auto_save_file_name, |
| 4262 ALLOCA, (auto_save_file_name_ext, | |
| 4263 auto_save_file_name_ext_len), | |
| 771 | 4264 Qescape_quoted); |
| 428 | 4265 if (!NILP (b->filename)) |
| 4266 { | |
| 442 | 4267 const Extbyte *filename_ext; |
| 665 | 4268 Bytecount filename_ext_len; |
| 428 | 4269 |
| 440 | 4270 TO_EXTERNAL_FORMAT (LISP_STRING, b->filename, |
| 4271 ALLOCA, (filename_ext, | |
| 4272 filename_ext_len), | |
| 771 | 4273 Qescape_quoted); |
| 4274 retry_write (listdesc, filename_ext, filename_ext_len); | |
| 428 | 4275 } |
| 771 | 4276 retry_write (listdesc, "\n", 1); |
| 4277 retry_write (listdesc, auto_save_file_name_ext, | |
| 428 | 4278 auto_save_file_name_ext_len); |
| 771 | 4279 retry_write (listdesc, "\n", 1); |
| 428 | 4280 } |
| 4281 | |
| 4282 /* dmoore - In a bad scenario we've set b=XBUFFER(buf) | |
| 4283 based on values in Vbuffer_alist. auto_save_1 may | |
| 4284 cause lisp handlers to run. Those handlers may kill | |
| 4285 the buffer and then GC. Since the buffer is killed, | |
| 4286 it's no longer in Vbuffer_alist so it might get reaped | |
| 4287 by the GC. We also need to protect tail. */ | |
| 4288 /* #### There is probably a lot of other code which has | |
| 4289 pointers into buffers which may get blown away by | |
| 4290 handlers. */ | |
| 4291 { | |
| 4292 struct gcpro ngcpro1, ngcpro2; | |
| 4293 NGCPRO2 (buf, tail); | |
| 4294 condition_case_1 (Qt, | |
| 4295 auto_save_1, Qnil, | |
| 4296 auto_save_error, Qnil); | |
| 4297 NUNGCPRO; | |
| 4298 } | |
| 4299 /* Handler killed our saved current-buffer! Pick any. */ | |
| 4300 if (!BUFFER_LIVE_P (XBUFFER (old))) | |
| 793 | 4301 old = wrap_buffer (current_buffer); |
| 428 | 4302 |
| 4303 set_buffer_internal (XBUFFER (old)); | |
| 4304 auto_saved++; | |
| 4305 | |
| 4306 /* Handler killed their own buffer! */ | |
| 4307 if (!BUFFER_LIVE_P(b)) | |
| 4308 continue; | |
| 4309 | |
| 4310 b->auto_save_modified = BUF_MODIFF (b); | |
| 4311 b->saved_size = make_int (BUF_SIZE (b)); | |
| 4312 EMACS_GET_TIME (after_time); | |
| 4313 /* If auto-save took more than 60 seconds, | |
| 4314 assume it was an NFS failure that got a timeout. */ | |
| 4315 if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
| 4316 b->auto_save_failure_time = EMACS_SECS (after_time); | |
| 4317 } | |
| 4318 } | |
| 4319 } | |
| 4320 | |
| 4321 /* Prevent another auto save till enough input events come in. */ | |
| 4322 if (auto_saved) | |
| 4323 record_auto_save (); | |
| 4324 | |
| 4325 /* If we didn't save anything into the listfile, remove the old | |
| 4326 one because nothing needed to be auto-saved. Do this afterwards | |
| 4327 rather than before in case we get a crash attempting to autosave | |
| 4328 (in that case we'd still want the old one around). */ | |
| 4329 if (listdesc < 0 && !auto_saved && STRINGP (listfile)) | |
| 771 | 4330 qxe_unlink (XSTRING_DATA (listfile)); |
| 428 | 4331 |
| 4332 /* Show "...done" only if the echo area would otherwise be empty. */ | |
| 4333 if (auto_saved && NILP (no_message) | |
| 4334 && NILP (clear_echo_area (selected_frame (), Qauto_saving, 0))) | |
| 4335 { | |
| 1333 | 4336 static const Ibyte *msg = (const Ibyte *)"Auto-saving...done"; |
| 428 | 4337 echo_area_message (selected_frame (), msg, Qnil, 0, |
| 1333 | 4338 qxestrlen (msg), Qauto_saving); |
| 428 | 4339 } |
| 4340 | |
| 4341 Vquit_flag = oquit; | |
| 4342 | |
| 771 | 4343 RETURN_UNGCPRO (unbind_to (speccount)); |
| 428 | 4344 } |
| 4345 | |
| 4346 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, 0, 0, 0, /* | |
| 4347 Mark current buffer as auto-saved with its current text. | |
| 4348 No auto-save file will be written until the buffer changes again. | |
| 4349 */ | |
| 4350 ()) | |
| 4351 { | |
| 4352 current_buffer->auto_save_modified = BUF_MODIFF (current_buffer); | |
| 4353 current_buffer->saved_size = make_int (BUF_SIZE (current_buffer)); | |
| 4354 current_buffer->auto_save_failure_time = -1; | |
| 4355 return Qnil; | |
| 4356 } | |
| 4357 | |
| 4358 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, 0, 0, 0, /* | |
| 4359 Clear any record of a recent auto-save failure in the current buffer. | |
| 4360 */ | |
| 4361 ()) | |
| 4362 { | |
| 4363 current_buffer->auto_save_failure_time = -1; | |
| 4364 return Qnil; | |
| 4365 } | |
| 4366 | |
| 4367 DEFUN ("recent-auto-save-p", Frecent_auto_save_p, 0, 0, 0, /* | |
| 4368 Return t if buffer has been auto-saved since last read in or saved. | |
| 4369 */ | |
| 4370 ()) | |
| 4371 { | |
| 4372 return (BUF_SAVE_MODIFF (current_buffer) < | |
| 4373 current_buffer->auto_save_modified) ? Qt : Qnil; | |
| 4374 } | |
| 4375 | |
| 4376 | |
| 4377 /************************************************************************/ | |
| 4378 /* initialization */ | |
| 4379 /************************************************************************/ | |
| 4380 | |
| 4381 void | |
| 4382 syms_of_fileio (void) | |
| 4383 { | |
| 563 | 4384 DEFSYMBOL (Qexpand_file_name); |
| 4385 DEFSYMBOL (Qfile_truename); | |
| 4386 DEFSYMBOL (Qsubstitute_in_file_name); | |
| 4387 DEFSYMBOL (Qdirectory_file_name); | |
| 4388 DEFSYMBOL (Qfile_name_directory); | |
| 4389 DEFSYMBOL (Qfile_name_nondirectory); | |
| 996 | 4390 DEFSYMBOL (Qfile_name_sans_extension); |
| 563 | 4391 DEFSYMBOL (Qunhandled_file_name_directory); |
| 4392 DEFSYMBOL (Qfile_name_as_directory); | |
| 4393 DEFSYMBOL (Qcopy_file); | |
| 4394 DEFSYMBOL (Qmake_directory_internal); | |
| 4395 DEFSYMBOL (Qdelete_directory); | |
| 4396 DEFSYMBOL (Qdelete_file); | |
| 4397 DEFSYMBOL (Qrename_file); | |
| 4398 DEFSYMBOL (Qadd_name_to_file); | |
| 4399 DEFSYMBOL (Qmake_symbolic_link); | |
| 844 | 4400 DEFSYMBOL (Qmake_temp_name); |
| 563 | 4401 DEFSYMBOL (Qfile_exists_p); |
| 4402 DEFSYMBOL (Qfile_executable_p); | |
| 4403 DEFSYMBOL (Qfile_readable_p); | |
| 4404 DEFSYMBOL (Qfile_symlink_p); | |
| 4405 DEFSYMBOL (Qfile_writable_p); | |
| 4406 DEFSYMBOL (Qfile_directory_p); | |
| 4407 DEFSYMBOL (Qfile_regular_p); | |
| 4408 DEFSYMBOL (Qfile_accessible_directory_p); | |
| 4409 DEFSYMBOL (Qfile_modes); | |
| 4410 DEFSYMBOL (Qset_file_modes); | |
| 4411 DEFSYMBOL (Qfile_newer_than_file_p); | |
| 4412 DEFSYMBOL (Qinsert_file_contents); | |
| 4413 DEFSYMBOL (Qwrite_region); | |
| 4414 DEFSYMBOL (Qverify_visited_file_modtime); | |
| 4415 DEFSYMBOL (Qset_visited_file_modtime); | |
| 4416 DEFSYMBOL (Qcar_less_than_car); /* Vomitous! */ | |
| 4266 | 4417 DEFSYMBOL (Qexcl); |
| 563 | 4418 |
| 4419 DEFSYMBOL (Qauto_save_hook); | |
| 4420 DEFSYMBOL (Qauto_save_error); | |
| 4421 DEFSYMBOL (Qauto_saving); | |
| 4422 | |
| 4423 DEFSYMBOL (Qformat_decode); | |
| 4424 DEFSYMBOL (Qformat_annotate_function); | |
| 4425 | |
| 4426 DEFSYMBOL (Qcompute_buffer_file_truename); | |
| 4427 | |
| 442 | 4428 DEFERROR_STANDARD (Qfile_already_exists, Qfile_error); |
| 428 | 4429 |
| 4430 DEFSUBR (Ffind_file_name_handler); | |
| 4431 | |
| 4432 DEFSUBR (Ffile_name_directory); | |
| 4433 DEFSUBR (Ffile_name_nondirectory); | |
| 4434 DEFSUBR (Funhandled_file_name_directory); | |
| 4435 DEFSUBR (Ffile_name_as_directory); | |
| 4436 DEFSUBR (Fdirectory_file_name); | |
| 4437 DEFSUBR (Fmake_temp_name); | |
| 4438 DEFSUBR (Fexpand_file_name); | |
| 4439 DEFSUBR (Ffile_truename); | |
| 4440 DEFSUBR (Fsubstitute_in_file_name); | |
| 4441 DEFSUBR (Fcopy_file); | |
| 4442 DEFSUBR (Fmake_directory_internal); | |
| 4443 DEFSUBR (Fdelete_directory); | |
| 4444 DEFSUBR (Fdelete_file); | |
| 4445 DEFSUBR (Frename_file); | |
| 4446 DEFSUBR (Fadd_name_to_file); | |
| 4447 DEFSUBR (Fmake_symbolic_link); | |
| 4448 #ifdef HPUX_NET | |
| 4449 DEFSUBR (Fsysnetunam); | |
| 4450 #endif /* HPUX_NET */ | |
| 4451 DEFSUBR (Ffile_name_absolute_p); | |
| 4452 DEFSUBR (Ffile_exists_p); | |
| 4453 DEFSUBR (Ffile_executable_p); | |
| 4454 DEFSUBR (Ffile_readable_p); | |
| 4455 DEFSUBR (Ffile_writable_p); | |
| 4456 DEFSUBR (Ffile_symlink_p); | |
| 4457 DEFSUBR (Ffile_directory_p); | |
| 4458 DEFSUBR (Ffile_accessible_directory_p); | |
| 4459 DEFSUBR (Ffile_regular_p); | |
| 4460 DEFSUBR (Ffile_modes); | |
| 4461 DEFSUBR (Fset_file_modes); | |
| 4462 DEFSUBR (Fset_default_file_modes); | |
| 4463 DEFSUBR (Fdefault_file_modes); | |
| 4464 DEFSUBR (Funix_sync); | |
| 4465 DEFSUBR (Ffile_newer_than_file_p); | |
| 4466 DEFSUBR (Finsert_file_contents_internal); | |
| 4467 DEFSUBR (Fwrite_region_internal); | |
| 4468 DEFSUBR (Fcar_less_than_car); /* Vomitous! */ | |
| 4469 DEFSUBR (Fcdr_less_than_cdr); /* Yeah oh yeah bucko .... */ | |
| 4470 #if 0 | |
| 4471 DEFSUBR (Fencrypt_string); | |
| 4472 DEFSUBR (Fdecrypt_string); | |
| 4473 #endif | |
| 4474 DEFSUBR (Fverify_visited_file_modtime); | |
| 4475 DEFSUBR (Fclear_visited_file_modtime); | |
| 4476 DEFSUBR (Fvisited_file_modtime); | |
| 4477 DEFSUBR (Fset_visited_file_modtime); | |
| 4478 | |
| 4479 DEFSUBR (Fdo_auto_save); | |
| 4480 DEFSUBR (Fset_buffer_auto_saved); | |
| 4481 DEFSUBR (Fclear_buffer_auto_save_failure); | |
| 4482 DEFSUBR (Frecent_auto_save_p); | |
| 4483 } | |
| 4484 | |
| 4485 void | |
| 4486 vars_of_fileio (void) | |
| 4487 { | |
| 2526 | 4488 QSin_expand_file_name = |
| 4489 build_msg_string ("(in expand-file-name)"); | |
| 4490 staticpro (&QSin_expand_file_name); | |
| 4491 | |
| 428 | 4492 DEFVAR_LISP ("auto-save-file-format", &Vauto_save_file_format /* |
| 4493 *Format in which to write auto-save files. | |
| 4494 Should be a list of symbols naming formats that are defined in `format-alist'. | |
| 4495 If it is t, which is the default, auto-save files are written in the | |
| 4496 same format as a regular save would use. | |
| 4497 */ ); | |
| 4498 Vauto_save_file_format = Qt; | |
| 4499 | |
| 4500 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist /* | |
| 4501 *Alist of elements (REGEXP . HANDLER) for file names handled specially. | |
| 4502 If a file name matches REGEXP, then all I/O on that file is done by calling | |
| 4503 HANDLER. | |
| 4504 | |
| 4505 The first argument given to HANDLER is the name of the I/O primitive | |
| 4506 to be handled; the remaining arguments are the arguments that were | |
| 4507 passed to that primitive. For example, if you do | |
| 4508 (file-exists-p FILENAME) | |
| 4509 and FILENAME is handled by HANDLER, then HANDLER is called like this: | |
| 4510 (funcall HANDLER 'file-exists-p FILENAME) | |
| 4511 The function `find-file-name-handler' checks this list for a handler | |
| 4512 for its argument. | |
| 4513 */ ); | |
| 4514 Vfile_name_handler_alist = Qnil; | |
| 4515 | |
| 4516 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions /* | |
| 4517 A list of functions to be called at the end of `insert-file-contents'. | |
| 4518 Each is passed one argument, the number of bytes inserted. It should return | |
| 4519 the new byte count, and leave point the same. If `insert-file-contents' is | |
| 4520 intercepted by a handler from `file-name-handler-alist', that handler is | |
| 4521 responsible for calling the after-insert-file-functions if appropriate. | |
| 4522 */ ); | |
| 4523 Vafter_insert_file_functions = Qnil; | |
| 4524 | |
| 4525 DEFVAR_LISP ("write-region-annotate-functions", | |
| 4526 &Vwrite_region_annotate_functions /* | |
| 4527 A list of functions to be called at the start of `write-region'. | |
| 4528 Each is passed two arguments, START and END, as for `write-region'. | |
| 4529 It should return a list of pairs (POSITION . STRING) of strings to be | |
| 4530 effectively inserted at the specified positions of the file being written | |
| 4531 \(1 means to insert before the first byte written). The POSITIONs must be | |
| 4532 sorted into increasing order. If there are several functions in the list, | |
| 4533 the several lists are merged destructively. | |
| 4534 */ ); | |
| 4535 Vwrite_region_annotate_functions = Qnil; | |
| 4536 | |
| 4537 DEFVAR_LISP ("write-region-annotations-so-far", | |
| 4538 &Vwrite_region_annotations_so_far /* | |
| 4539 When an annotation function is called, this holds the previous annotations. | |
| 4540 These are the annotations made by other annotation functions | |
| 4541 that were already called. See also `write-region-annotate-functions'. | |
| 4542 */ ); | |
| 4543 Vwrite_region_annotations_so_far = Qnil; | |
| 4544 | |
| 4545 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers /* | |
| 4546 A list of file name handlers that temporarily should not be used. | |
| 4547 This applies only to the operation `inhibit-file-name-operation'. | |
| 4548 */ ); | |
| 4549 Vinhibit_file_name_handlers = Qnil; | |
| 4550 | |
| 4551 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation /* | |
| 4552 The operation for which `inhibit-file-name-handlers' is applicable. | |
| 4553 */ ); | |
| 4554 Vinhibit_file_name_operation = Qnil; | |
| 4555 | |
| 4556 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name /* | |
| 4557 File name in which we write a list of all auto save file names. | |
| 4558 */ ); | |
| 4559 Vauto_save_list_file_name = Qnil; | |
| 4560 | |
|
4499
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4561 #ifdef HAVE_FSYNC |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4562 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
|
4563 *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
|
4564 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
|
4565 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
|
4566 */ ); |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4567 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
|
4568 #endif |
|
eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4465
diff
changeset
|
4569 |
| 444 | 4570 DEFVAR_LISP ("auto-save-list-file-prefix", &Vauto_save_list_file_prefix /* |
| 4571 Prefix for generating auto-save-list-file-name. | |
| 4572 Emacs's pid and the system name will be appended to | |
| 4573 this prefix to create a unique file name. | |
| 4574 */ ); | |
| 4575 Vauto_save_list_file_prefix = build_string ("~/.saves-"); | |
| 4576 | |
| 4577 DEFVAR_BOOL ("inhibit-auto-save-session", &inhibit_auto_save_session /* | |
| 4578 When non-nil, inhibit auto save list file creation. | |
| 4579 */ ); | |
| 4580 inhibit_auto_save_session = 0; | |
| 4581 | |
| 428 | 4582 DEFVAR_BOOL ("disable-auto-save-when-buffer-shrinks", |
| 4583 &disable_auto_save_when_buffer_shrinks /* | |
| 4584 If non-nil, auto-saving is disabled when a buffer shrinks too much. | |
| 4585 This is to prevent you from losing your edits if you accidentally | |
| 4586 delete a large chunk of the buffer and don't notice it until too late. | |
| 4587 Saving the buffer normally turns auto-save back on. | |
| 4588 */ ); | |
| 4589 disable_auto_save_when_buffer_shrinks = 1; | |
| 4590 | |
| 4591 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char /* | |
| 4592 Directory separator character for built-in functions that return file names. | |
| 4593 The value should be either ?/ or ?\\ (any other value is treated as ?\\). | |
| 4594 This variable affects the built-in functions only on Windows, | |
| 4595 on other platforms, it is initialized so that Lisp code can find out | |
| 4596 what the normal separator is. | |
| 4597 */ ); | |
| 771 | 4598 Vdirectory_sep_char = make_char (DEFAULT_DIRECTORY_SEP); |
| 428 | 4599 } |
| 442 | 4600 |
| 4601 void | |
| 4602 reinit_vars_of_fileio (void) | |
| 4603 { | |
| 4604 /* We want temp_name_rand to be initialized to a value likely to be | |
| 4605 unique to the process, not to the executable. The danger is that | |
| 4606 two different XEmacs processes using the same binary on different | |
| 4607 machines creating temp files in the same directory will be | |
| 4608 unlucky enough to have the same pid. If we randomize using | |
| 4609 process startup time, then in practice they will be unlikely to | |
| 4610 collide. We use the microseconds field so that scripts that start | |
| 4611 simultaneous XEmacs processes on multiple machines will have less | |
| 4612 chance of collision. */ | |
| 4613 { | |
| 4614 EMACS_TIME thyme; | |
| 4615 | |
| 4616 EMACS_GET_TIME (thyme); | |
| 4617 temp_name_rand = (unsigned int) (EMACS_SECS (thyme) ^ EMACS_USECS (thyme)); | |
| 4618 } | |
| 4619 } |