Commit | Line | Data |
---|---|---|
570d7624 | 1 | /* File IO for GNU Emacs. |
ce97267f | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994 Free Software Foundation, Inc. |
570d7624 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
4746118a | 8 | the Free Software Foundation; either version 2, or (at your option) |
570d7624 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
18160b98 | 20 | #include <config.h> |
570d7624 JB |
21 | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
bfb61299 | 24 | |
f73b0ada BF |
25 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
26 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) | |
27 | #endif | |
28 | ||
29 | #if !defined (S_ISREG) && defined (S_IFREG) | |
30 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) | |
31 | #endif | |
32 | ||
bfb61299 | 33 | #ifdef VMS |
de5bf5d3 | 34 | #include "vms-pwd.h" |
bfb61299 | 35 | #else |
570d7624 | 36 | #include <pwd.h> |
bfb61299 JB |
37 | #endif |
38 | ||
4c3c22f3 RS |
39 | #ifdef MSDOS |
40 | #include "msdos.h" | |
41 | #include <sys/param.h> | |
42 | #endif | |
43 | ||
570d7624 | 44 | #include <ctype.h> |
bfb61299 JB |
45 | |
46 | #ifdef VMS | |
3d9f5ce2 | 47 | #include "vmsdir.h" |
bfb61299 JB |
48 | #include <perror.h> |
49 | #include <stddef.h> | |
50 | #include <string.h> | |
bfb61299 JB |
51 | #endif |
52 | ||
570d7624 JB |
53 | #include <errno.h> |
54 | ||
bfb61299 | 55 | #ifndef vax11c |
570d7624 | 56 | extern int errno; |
570d7624 JB |
57 | #endif |
58 | ||
ce97267f | 59 | extern char *strerror (); |
570d7624 JB |
60 | |
61 | #ifdef APOLLO | |
62 | #include <sys/time.h> | |
63 | #endif | |
64 | ||
6e23c83e JB |
65 | #ifndef USG |
66 | #ifndef VMS | |
67 | #ifndef BSD4_1 | |
68 | #define HAVE_FSYNC | |
69 | #endif | |
70 | #endif | |
71 | #endif | |
72 | ||
570d7624 | 73 | #include "lisp.h" |
8d4e077b | 74 | #include "intervals.h" |
570d7624 JB |
75 | #include "buffer.h" |
76 | #include "window.h" | |
77 | ||
78 | #ifdef VMS | |
570d7624 JB |
79 | #include <file.h> |
80 | #include <rmsdef.h> | |
81 | #include <fab.h> | |
82 | #include <nam.h> | |
83 | #endif | |
84 | ||
de5bf5d3 | 85 | #include "systime.h" |
570d7624 JB |
86 | |
87 | #ifdef HPUX | |
88 | #include <netio.h> | |
9b7828a5 | 89 | #ifndef HPUX8 |
47e7b9e5 | 90 | #ifndef HPUX9 |
570d7624 JB |
91 | #include <errnet.h> |
92 | #endif | |
9b7828a5 | 93 | #endif |
47e7b9e5 | 94 | #endif |
570d7624 JB |
95 | |
96 | #ifndef O_WRONLY | |
97 | #define O_WRONLY 1 | |
98 | #endif | |
99 | ||
100 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
101 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
102 | ||
103 | /* Nonzero during writing of auto-save files */ | |
104 | int auto_saving; | |
105 | ||
106 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create | |
107 | a new file with the same mode as the original */ | |
108 | int auto_save_mode_bits; | |
109 | ||
32f4334d RS |
110 | /* Alist of elements (REGEXP . HANDLER) for file names |
111 | whose I/O is done with a special handler. */ | |
112 | Lisp_Object Vfile_name_handler_alist; | |
113 | ||
d6a3cc15 RS |
114 | /* Functions to be called to process text properties in inserted file. */ |
115 | Lisp_Object Vafter_insert_file_functions; | |
116 | ||
117 | /* Functions to be called to create text property annotations for file. */ | |
118 | Lisp_Object Vwrite_region_annotate_functions; | |
119 | ||
570d7624 JB |
120 | /* Nonzero means, when reading a filename in the minibuffer, |
121 | start out by inserting the default directory into the minibuffer. */ | |
122 | int insert_default_directory; | |
123 | ||
124 | /* On VMS, nonzero means write new files with record format stmlf. | |
125 | Zero means use var format. */ | |
126 | int vms_stmlf_recfm; | |
127 | ||
82c2d839 RS |
128 | static Lisp_Object Vinhibit_file_name_handlers; |
129 | ||
570d7624 JB |
130 | Lisp_Object Qfile_error, Qfile_already_exists; |
131 | ||
15c65264 RS |
132 | Lisp_Object Qfile_name_history; |
133 | ||
d6a3cc15 RS |
134 | Lisp_Object Qcar_less_than_car; |
135 | ||
570d7624 JB |
136 | report_file_error (string, data) |
137 | char *string; | |
138 | Lisp_Object data; | |
139 | { | |
140 | Lisp_Object errstring; | |
141 | ||
a1f17b2d | 142 | errstring = build_string (strerror (errno)); |
570d7624 JB |
143 | |
144 | /* System error messages are capitalized. Downcase the initial | |
145 | unless it is followed by a slash. */ | |
146 | if (XSTRING (errstring)->data[1] != '/') | |
147 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); | |
148 | ||
149 | while (1) | |
150 | Fsignal (Qfile_error, | |
151 | Fcons (build_string (string), Fcons (errstring, data))); | |
152 | } | |
b5148e85 RS |
153 | |
154 | close_file_unwind (fd) | |
155 | Lisp_Object fd; | |
156 | { | |
157 | close (XFASTINT (fd)); | |
158 | } | |
a1d2b64a RS |
159 | |
160 | /* Restore point, having saved it as a marker. */ | |
161 | ||
162 | restore_point_unwind (location) | |
163 | Lisp_Object location; | |
164 | { | |
165 | SET_PT (marker_position (location)); | |
166 | Fset_marker (location, Qnil, Qnil); | |
167 | } | |
570d7624 | 168 | \f |
0bf2eed2 RS |
169 | Lisp_Object Qexpand_file_name; |
170 | Lisp_Object Qdirectory_file_name; | |
171 | Lisp_Object Qfile_name_directory; | |
172 | Lisp_Object Qfile_name_nondirectory; | |
642ef245 | 173 | Lisp_Object Qunhandled_file_name_directory; |
0bf2eed2 | 174 | Lisp_Object Qfile_name_as_directory; |
32f4334d RS |
175 | Lisp_Object Qcopy_file; |
176 | Lisp_Object Qmake_directory; | |
177 | Lisp_Object Qdelete_directory; | |
178 | Lisp_Object Qdelete_file; | |
179 | Lisp_Object Qrename_file; | |
180 | Lisp_Object Qadd_name_to_file; | |
181 | Lisp_Object Qmake_symbolic_link; | |
182 | Lisp_Object Qfile_exists_p; | |
183 | Lisp_Object Qfile_executable_p; | |
184 | Lisp_Object Qfile_readable_p; | |
185 | Lisp_Object Qfile_symlink_p; | |
186 | Lisp_Object Qfile_writable_p; | |
187 | Lisp_Object Qfile_directory_p; | |
188 | Lisp_Object Qfile_accessible_directory_p; | |
189 | Lisp_Object Qfile_modes; | |
190 | Lisp_Object Qset_file_modes; | |
191 | Lisp_Object Qfile_newer_than_file_p; | |
192 | Lisp_Object Qinsert_file_contents; | |
193 | Lisp_Object Qwrite_region; | |
194 | Lisp_Object Qverify_visited_file_modtime; | |
3ec46acd | 195 | Lisp_Object Qset_visited_file_modtime; |
32f4334d | 196 | |
642ef245 JB |
197 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 1, 1, 0, |
198 | "Return FILENAME's handler function, if its syntax is handled specially.\n\ | |
199 | Otherwise, return nil.\n\ | |
200 | A file name is handled if one of the regular expressions in\n\ | |
82c2d839 RS |
201 | `file-name-handler-alist' matches it.\n\n\ |
202 | If FILENAME is a member of `inhibit-file-name-handlers',\n\ | |
203 | then its handler is not run. This is lets handlers\n\ | |
204 | use the standard functions without calling themselves recursively.") | |
642ef245 JB |
205 | (filename) |
206 | Lisp_Object filename; | |
32f4334d | 207 | { |
642ef245 | 208 | /* This function must not munge the match data. */ |
4554406a | 209 | Lisp_Object chain; |
642ef245 | 210 | |
e4432095 JB |
211 | CHECK_STRING (filename, 0); |
212 | ||
82c2d839 RS |
213 | if (! NILP (Vinhibit_file_name_handlers)) |
214 | { | |
215 | Lisp_Object tail; | |
216 | for (tail = Vinhibit_file_name_handlers; CONSP (tail); | |
217 | tail = XCONS (tail)->cdr) | |
218 | { | |
219 | Lisp_Object tem; | |
220 | tem = Fstring_equal (tail, filename); | |
221 | if (!NILP (tem)) | |
222 | return Qnil; | |
223 | } | |
224 | } | |
225 | ||
3eac9910 | 226 | for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons; |
32f4334d RS |
227 | chain = XCONS (chain)->cdr) |
228 | { | |
229 | Lisp_Object elt; | |
230 | elt = XCONS (chain)->car; | |
231 | if (XTYPE (elt) == Lisp_Cons) | |
232 | { | |
233 | Lisp_Object string; | |
234 | string = XCONS (elt)->car; | |
235 | if (XTYPE (string) == Lisp_String | |
09121adc | 236 | && fast_string_match (string, filename) >= 0) |
32f4334d RS |
237 | return XCONS (elt)->cdr; |
238 | } | |
642ef245 JB |
239 | |
240 | QUIT; | |
32f4334d RS |
241 | } |
242 | return Qnil; | |
243 | } | |
244 | \f | |
570d7624 JB |
245 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
246 | 1, 1, 0, | |
247 | "Return the directory component in file name NAME.\n\ | |
248 | Return nil if NAME does not include a directory.\n\ | |
249 | Otherwise return a directory spec.\n\ | |
250 | Given a Unix syntax file name, returns a string ending in slash;\n\ | |
251 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") | |
252 | (file) | |
253 | Lisp_Object file; | |
254 | { | |
255 | register unsigned char *beg; | |
256 | register unsigned char *p; | |
0bf2eed2 | 257 | Lisp_Object handler; |
570d7624 JB |
258 | |
259 | CHECK_STRING (file, 0); | |
260 | ||
0bf2eed2 RS |
261 | /* If the file name has special constructs in it, |
262 | call the corresponding file handler. */ | |
642ef245 | 263 | handler = Ffind_file_name_handler (file); |
0bf2eed2 RS |
264 | if (!NILP (handler)) |
265 | return call2 (handler, Qfile_name_directory, file); | |
266 | ||
4c3c22f3 RS |
267 | #ifdef FILE_SYSTEM_CASE |
268 | file = FILE_SYSTEM_CASE (file); | |
269 | #endif | |
570d7624 JB |
270 | beg = XSTRING (file)->data; |
271 | p = beg + XSTRING (file)->size; | |
272 | ||
273 | while (p != beg && p[-1] != '/' | |
274 | #ifdef VMS | |
275 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
276 | #endif /* VMS */ | |
4c3c22f3 RS |
277 | #ifdef MSDOS |
278 | && p[-1] != ':' | |
279 | #endif | |
570d7624 JB |
280 | ) p--; |
281 | ||
282 | if (p == beg) | |
283 | return Qnil; | |
4c3c22f3 RS |
284 | #ifdef MSDOS |
285 | /* Expansion of "c:" to drive and default directory. */ | |
286 | if (p == beg + 2 && beg[1] == ':') | |
287 | { | |
288 | int drive = (*beg) - 'a'; | |
289 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ | |
290 | unsigned char *res = alloca (MAXPATHLEN + 5); | |
291 | if (getdefdir (drive + 1, res + 2)) | |
292 | { | |
293 | res[0] = drive + 'a'; | |
294 | res[1] = ':'; | |
295 | if (res[strlen (res) - 1] != '/') | |
296 | strcat (res, "/"); | |
297 | beg = res; | |
298 | p = beg + strlen (beg); | |
299 | } | |
300 | } | |
301 | #endif | |
570d7624 JB |
302 | return make_string (beg, p - beg); |
303 | } | |
304 | ||
305 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, | |
306 | 1, 1, 0, | |
307 | "Return file name NAME sans its directory.\n\ | |
308 | For example, in a Unix-syntax file name,\n\ | |
309 | this is everything after the last slash,\n\ | |
310 | or the entire name if it contains no slash.") | |
311 | (file) | |
312 | Lisp_Object file; | |
313 | { | |
314 | register unsigned char *beg, *p, *end; | |
0bf2eed2 | 315 | Lisp_Object handler; |
570d7624 JB |
316 | |
317 | CHECK_STRING (file, 0); | |
318 | ||
0bf2eed2 RS |
319 | /* If the file name has special constructs in it, |
320 | call the corresponding file handler. */ | |
642ef245 | 321 | handler = Ffind_file_name_handler (file); |
0bf2eed2 RS |
322 | if (!NILP (handler)) |
323 | return call2 (handler, Qfile_name_nondirectory, file); | |
324 | ||
570d7624 JB |
325 | beg = XSTRING (file)->data; |
326 | end = p = beg + XSTRING (file)->size; | |
327 | ||
328 | while (p != beg && p[-1] != '/' | |
329 | #ifdef VMS | |
330 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
331 | #endif /* VMS */ | |
4c3c22f3 RS |
332 | #ifdef MSDOS |
333 | && p[-1] != ':' | |
334 | #endif | |
570d7624 JB |
335 | ) p--; |
336 | ||
337 | return make_string (p, end - p); | |
338 | } | |
642ef245 JB |
339 | |
340 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, Sunhandled_file_name_directory, 1, 1, 0, | |
341 | "Return a directly usable directory name somehow associated with FILENAME.\n\ | |
342 | A `directly usable' directory name is one that may be used without the\n\ | |
343 | intervention of any file handler.\n\ | |
344 | If FILENAME is a directly usable file itself, return\n\ | |
345 | (file-name-directory FILENAME).\n\ | |
346 | The `call-process' and `start-process' functions use this function to\n\ | |
347 | get a current directory to run processes in.") | |
348 | (filename) | |
349 | Lisp_Object filename; | |
350 | { | |
351 | Lisp_Object handler; | |
352 | ||
353 | /* If the file name has special constructs in it, | |
354 | call the corresponding file handler. */ | |
355 | handler = Ffind_file_name_handler (filename); | |
356 | if (!NILP (handler)) | |
357 | return call2 (handler, Qunhandled_file_name_directory, filename); | |
358 | ||
359 | return Ffile_name_directory (filename); | |
360 | } | |
361 | ||
570d7624 JB |
362 | \f |
363 | char * | |
364 | file_name_as_directory (out, in) | |
365 | char *out, *in; | |
366 | { | |
367 | int size = strlen (in) - 1; | |
368 | ||
369 | strcpy (out, in); | |
370 | ||
371 | #ifdef VMS | |
372 | /* Is it already a directory string? */ | |
373 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') | |
374 | return out; | |
375 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ | |
376 | else if (! index (in, '/') | |
377 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) | |
378 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) | |
379 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) | |
380 | || ! strncmp (&in[size - 5], ".dir", 4)) | |
381 | && (in[size - 1] == '.' || in[size - 1] == ';') | |
382 | && in[size] == '1'))) | |
383 | { | |
384 | register char *p, *dot; | |
385 | char brack; | |
386 | ||
387 | /* x.dir -> [.x] | |
388 | dir:x.dir --> dir:[x] | |
389 | dir:[x]y.dir --> dir:[x.y] */ | |
390 | p = in + size; | |
391 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; | |
392 | if (p != in) | |
393 | { | |
394 | strncpy (out, in, p - in); | |
395 | out[p - in] = '\0'; | |
396 | if (*p == ':') | |
397 | { | |
398 | brack = ']'; | |
399 | strcat (out, ":["); | |
400 | } | |
401 | else | |
402 | { | |
403 | brack = *p; | |
404 | strcat (out, "."); | |
405 | } | |
406 | p++; | |
407 | } | |
408 | else | |
409 | { | |
410 | brack = ']'; | |
411 | strcpy (out, "[."); | |
412 | } | |
bfb61299 JB |
413 | dot = index (p, '.'); |
414 | if (dot) | |
570d7624 JB |
415 | { |
416 | /* blindly remove any extension */ | |
417 | size = strlen (out) + (dot - p); | |
418 | strncat (out, p, dot - p); | |
419 | } | |
420 | else | |
421 | { | |
422 | strcat (out, p); | |
423 | size = strlen (out); | |
424 | } | |
425 | out[size++] = brack; | |
426 | out[size] = '\0'; | |
427 | } | |
428 | #else /* not VMS */ | |
429 | /* For Unix syntax, Append a slash if necessary */ | |
4c3c22f3 RS |
430 | #ifdef MSDOS |
431 | if (out[size] != ':' && out[size] != '/') | |
432 | #else | |
570d7624 | 433 | if (out[size] != '/') |
4c3c22f3 | 434 | #endif |
570d7624 JB |
435 | strcat (out, "/"); |
436 | #endif /* not VMS */ | |
437 | return out; | |
438 | } | |
439 | ||
440 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, | |
441 | Sfile_name_as_directory, 1, 1, 0, | |
442 | "Return a string representing file FILENAME interpreted as a directory.\n\ | |
443 | This operation exists because a directory is also a file, but its name as\n\ | |
444 | a directory is different from its name as a file.\n\ | |
445 | The result can be used as the value of `default-directory'\n\ | |
446 | or passed as second argument to `expand-file-name'.\n\ | |
447 | For a Unix-syntax file name, just appends a slash.\n\ | |
448 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") | |
449 | (file) | |
450 | Lisp_Object file; | |
451 | { | |
452 | char *buf; | |
0bf2eed2 | 453 | Lisp_Object handler; |
570d7624 JB |
454 | |
455 | CHECK_STRING (file, 0); | |
265a9e55 | 456 | if (NILP (file)) |
570d7624 | 457 | return Qnil; |
0bf2eed2 RS |
458 | |
459 | /* If the file name has special constructs in it, | |
460 | call the corresponding file handler. */ | |
642ef245 | 461 | handler = Ffind_file_name_handler (file); |
0bf2eed2 RS |
462 | if (!NILP (handler)) |
463 | return call2 (handler, Qfile_name_as_directory, file); | |
464 | ||
570d7624 JB |
465 | buf = (char *) alloca (XSTRING (file)->size + 10); |
466 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); | |
467 | } | |
468 | \f | |
469 | /* | |
470 | * Convert from directory name to filename. | |
471 | * On VMS: | |
472 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 | |
473 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 | |
474 | * On UNIX, it's simple: just make sure there is a terminating / | |
475 | ||
476 | * Value is nonzero if the string output is different from the input. | |
477 | */ | |
478 | ||
479 | directory_file_name (src, dst) | |
480 | char *src, *dst; | |
481 | { | |
482 | long slen; | |
483 | #ifdef VMS | |
484 | long rlen; | |
485 | char * ptr, * rptr; | |
486 | char bracket; | |
487 | struct FAB fab = cc$rms_fab; | |
488 | struct NAM nam = cc$rms_nam; | |
489 | char esa[NAM$C_MAXRSS]; | |
490 | #endif /* VMS */ | |
491 | ||
492 | slen = strlen (src); | |
493 | #ifdef VMS | |
494 | if (! index (src, '/') | |
495 | && (src[slen - 1] == ']' | |
496 | || src[slen - 1] == ':' | |
497 | || src[slen - 1] == '>')) | |
498 | { | |
499 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ | |
500 | fab.fab$l_fna = src; | |
501 | fab.fab$b_fns = slen; | |
502 | fab.fab$l_nam = &nam; | |
503 | fab.fab$l_fop = FAB$M_NAM; | |
504 | ||
505 | nam.nam$l_esa = esa; | |
506 | nam.nam$b_ess = sizeof esa; | |
507 | nam.nam$b_nop |= NAM$M_SYNCHK; | |
508 | ||
509 | /* We call SYS$PARSE to handle such things as [--] for us. */ | |
510 | if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL) | |
511 | { | |
512 | slen = nam.nam$b_esl; | |
513 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') | |
514 | slen -= 2; | |
515 | esa[slen] = '\0'; | |
516 | src = esa; | |
517 | } | |
518 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
519 | { | |
520 | /* what about when we have logical_name:???? */ | |
521 | if (src[slen - 1] == ':') | |
522 | { /* Xlate logical name and see what we get */ | |
523 | ptr = strcpy (dst, src); /* upper case for getenv */ | |
524 | while (*ptr) | |
525 | { | |
526 | if ('a' <= *ptr && *ptr <= 'z') | |
527 | *ptr -= 040; | |
528 | ptr++; | |
529 | } | |
530 | dst[slen - 1] = 0; /* remove colon */ | |
531 | if (!(src = egetenv (dst))) | |
532 | return 0; | |
533 | /* should we jump to the beginning of this procedure? | |
534 | Good points: allows us to use logical names that xlate | |
535 | to Unix names, | |
536 | Bad points: can be a problem if we just translated to a device | |
537 | name... | |
538 | For now, I'll punt and always expect VMS names, and hope for | |
539 | the best! */ | |
540 | slen = strlen (src); | |
541 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
542 | { /* no recursion here! */ | |
543 | strcpy (dst, src); | |
544 | return 0; | |
545 | } | |
546 | } | |
547 | else | |
548 | { /* not a directory spec */ | |
549 | strcpy (dst, src); | |
550 | return 0; | |
551 | } | |
552 | } | |
553 | bracket = src[slen - 1]; | |
554 | ||
555 | /* If bracket is ']' or '>', bracket - 2 is the corresponding | |
556 | opening bracket. */ | |
bfb61299 JB |
557 | ptr = index (src, bracket - 2); |
558 | if (ptr == 0) | |
570d7624 JB |
559 | { /* no opening bracket */ |
560 | strcpy (dst, src); | |
561 | return 0; | |
562 | } | |
563 | if (!(rptr = rindex (src, '.'))) | |
564 | rptr = ptr; | |
565 | slen = rptr - src; | |
566 | strncpy (dst, src, slen); | |
567 | dst[slen] = '\0'; | |
568 | if (*rptr == '.') | |
569 | { | |
570 | dst[slen++] = bracket; | |
571 | dst[slen] = '\0'; | |
572 | } | |
573 | else | |
574 | { | |
575 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), | |
576 | then translate the device and recurse. */ | |
577 | if (dst[slen - 1] == ':' | |
578 | && dst[slen - 2] != ':' /* skip decnet nodes */ | |
579 | && strcmp(src + slen, "[000000]") == 0) | |
580 | { | |
581 | dst[slen - 1] = '\0'; | |
582 | if ((ptr = egetenv (dst)) | |
583 | && (rlen = strlen (ptr) - 1) > 0 | |
584 | && (ptr[rlen] == ']' || ptr[rlen] == '>') | |
585 | && ptr[rlen - 1] == '.') | |
586 | { | |
72b21817 RS |
587 | char * buf = (char *) alloca (strlen (ptr) + 1); |
588 | strcpy (buf, ptr); | |
589 | buf[rlen - 1] = ']'; | |
590 | buf[rlen] = '\0'; | |
591 | return directory_file_name (buf, dst); | |
570d7624 JB |
592 | } |
593 | else | |
594 | dst[slen - 1] = ':'; | |
595 | } | |
596 | strcat (dst, "[000000]"); | |
597 | slen += 8; | |
598 | } | |
599 | rptr++; | |
600 | rlen = strlen (rptr) - 1; | |
601 | strncat (dst, rptr, rlen); | |
602 | dst[slen + rlen] = '\0'; | |
603 | strcat (dst, ".DIR.1"); | |
604 | return 1; | |
605 | } | |
606 | #endif /* VMS */ | |
607 | /* Process as Unix format: just remove any final slash. | |
608 | But leave "/" unchanged; do not change it to "". */ | |
609 | strcpy (dst, src); | |
4c3c22f3 RS |
610 | if (slen > 1 |
611 | && dst[slen - 1] == '/' | |
612 | #ifdef MSDOS | |
613 | && dst[slen - 2] != ':' | |
614 | #endif | |
615 | ) | |
570d7624 JB |
616 | dst[slen - 1] = 0; |
617 | return 1; | |
618 | } | |
619 | ||
620 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, | |
621 | 1, 1, 0, | |
622 | "Returns the file name of the directory named DIR.\n\ | |
623 | This is the name of the file that holds the data for the directory DIR.\n\ | |
624 | This operation exists because a directory is also a file, but its name as\n\ | |
625 | a directory is different from its name as a file.\n\ | |
626 | In Unix-syntax, this function just removes the final slash.\n\ | |
627 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ | |
628 | it returns a file name such as \"[X]Y.DIR.1\".") | |
629 | (directory) | |
630 | Lisp_Object directory; | |
631 | { | |
632 | char *buf; | |
0bf2eed2 | 633 | Lisp_Object handler; |
570d7624 JB |
634 | |
635 | CHECK_STRING (directory, 0); | |
636 | ||
265a9e55 | 637 | if (NILP (directory)) |
570d7624 | 638 | return Qnil; |
0bf2eed2 RS |
639 | |
640 | /* If the file name has special constructs in it, | |
641 | call the corresponding file handler. */ | |
642ef245 | 642 | handler = Ffind_file_name_handler (directory); |
0bf2eed2 RS |
643 | if (!NILP (handler)) |
644 | return call2 (handler, Qdirectory_file_name, directory); | |
645 | ||
570d7624 JB |
646 | #ifdef VMS |
647 | /* 20 extra chars is insufficient for VMS, since we might perform a | |
648 | logical name translation. an equivalence string can be up to 255 | |
649 | chars long, so grab that much extra space... - sss */ | |
650 | buf = (char *) alloca (XSTRING (directory)->size + 20 + 255); | |
651 | #else | |
652 | buf = (char *) alloca (XSTRING (directory)->size + 20); | |
653 | #endif | |
654 | directory_file_name (XSTRING (directory)->data, buf); | |
655 | return build_string (buf); | |
656 | } | |
657 | ||
658 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
659 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ | |
660 | The Emacs process number forms part of the result,\n\ | |
661 | so there is no danger of generating a name being used by another process.") | |
662 | (prefix) | |
663 | Lisp_Object prefix; | |
664 | { | |
665 | Lisp_Object val; | |
666 | val = concat2 (prefix, build_string ("XXXXXX")); | |
667 | mktemp (XSTRING (val)->data); | |
668 | return val; | |
669 | } | |
670 | \f | |
671 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
672 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
673 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
674 | (does not start with slash); if DEFAULT is nil or missing,\n\ | |
675 | the current buffer's value of default-directory is used.\n\ | |
b72dea2a JB |
676 | Path components that are `.' are removed, and \n\ |
677 | path components followed by `..' are removed, along with the `..' itself;\n\ | |
678 | note that these simplifications are done without checking the resulting\n\ | |
679 | paths in the file system.\n\ | |
680 | An initial `~/' expands to your home directory.\n\ | |
681 | An initial `~USER/' expands to USER's home directory.\n\ | |
570d7624 JB |
682 | See also the function `substitute-in-file-name'.") |
683 | (name, defalt) | |
684 | Lisp_Object name, defalt; | |
685 | { | |
686 | unsigned char *nm; | |
687 | ||
688 | register unsigned char *newdir, *p, *o; | |
689 | int tlen; | |
690 | unsigned char *target; | |
691 | struct passwd *pw; | |
570d7624 JB |
692 | #ifdef VMS |
693 | unsigned char * colon = 0; | |
694 | unsigned char * close = 0; | |
695 | unsigned char * slash = 0; | |
696 | unsigned char * brack = 0; | |
697 | int lbrack = 0, rbrack = 0; | |
698 | int dots = 0; | |
699 | #endif /* VMS */ | |
4c3c22f3 RS |
700 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
701 | int drive = -1; | |
702 | int relpath = 0; | |
703 | unsigned char *tmp, *defdir; | |
704 | #endif | |
0bf2eed2 | 705 | Lisp_Object handler; |
570d7624 JB |
706 | |
707 | CHECK_STRING (name, 0); | |
708 | ||
0bf2eed2 RS |
709 | /* If the file name has special constructs in it, |
710 | call the corresponding file handler. */ | |
642ef245 | 711 | handler = Ffind_file_name_handler (name); |
0bf2eed2 | 712 | if (!NILP (handler)) |
09121adc | 713 | return call3 (handler, Qexpand_file_name, name, defalt); |
0bf2eed2 | 714 | |
4ad827c5 RS |
715 | /* Use the buffer's default-directory if DEFALT is omitted. */ |
716 | if (NILP (defalt)) | |
717 | defalt = current_buffer->directory; | |
718 | CHECK_STRING (defalt, 1); | |
719 | ||
f14b1c68 JB |
720 | /* Make sure DEFALT is properly expanded. |
721 | It would be better to do this down below where we actually use | |
722 | defalt. Unfortunately, calling Fexpand_file_name recursively | |
723 | could invoke GC, and the strings might be relocated. This would | |
724 | be annoying because we have pointers into strings lying around | |
725 | that would need adjusting, and people would add new pointers to | |
726 | the code and forget to adjust them, resulting in intermittent bugs. | |
4ad827c5 RS |
727 | Putting this call here avoids all that crud. |
728 | ||
729 | The EQ test avoids infinite recursion. */ | |
730 | if (! NILP (defalt) && !EQ (defalt, name) | |
731 | /* This saves time in a common case. */ | |
732 | && XSTRING (defalt)->data[0] != '/') | |
f14b1c68 JB |
733 | { |
734 | struct gcpro gcpro1; | |
735 | ||
736 | GCPRO1 (name); | |
737 | defalt = Fexpand_file_name (defalt, Qnil); | |
738 | UNGCPRO; | |
739 | } | |
740 | ||
570d7624 JB |
741 | #ifdef VMS |
742 | /* Filenames on VMS are always upper case. */ | |
743 | name = Fupcase (name); | |
744 | #endif | |
4c3c22f3 RS |
745 | #ifdef FILE_SYSTEM_CASE |
746 | name = FILE_SYSTEM_CASE (name); | |
747 | #endif | |
570d7624 JB |
748 | |
749 | nm = XSTRING (name)->data; | |
750 | ||
4c3c22f3 RS |
751 | #ifdef MSDOS |
752 | /* firstly, strip drive name. */ | |
753 | { | |
754 | unsigned char *colon = rindex (nm, ':'); | |
755 | if (colon) | |
756 | if (nm == colon) | |
757 | nm++; | |
758 | else | |
759 | { | |
760 | drive = tolower (colon[-1]) - 'a'; | |
761 | nm = colon + 1; | |
762 | if (*nm != '/') | |
763 | { | |
764 | defdir = alloca (MAXPATHLEN + 1); | |
765 | relpath = getdefdir (drive + 1, defdir); | |
766 | } | |
767 | } | |
768 | } | |
769 | #endif | |
770 | ||
570d7624 JB |
771 | /* If nm is absolute, flush ...// and detect /./ and /../. |
772 | If no /./ or /../ we can return right away. */ | |
773 | if ( | |
774 | nm[0] == '/' | |
775 | #ifdef VMS | |
776 | || index (nm, ':') | |
777 | #endif /* VMS */ | |
778 | ) | |
779 | { | |
f14b1c68 JB |
780 | /* If it turns out that the filename we want to return is just a |
781 | suffix of FILENAME, we don't need to go through and edit | |
782 | things; we just need to construct a new string using data | |
783 | starting at the middle of FILENAME. If we set lose to a | |
784 | non-zero value, that means we've discovered that we can't do | |
785 | that cool trick. */ | |
786 | int lose = 0; | |
787 | ||
570d7624 | 788 | p = nm; |
570d7624 JB |
789 | while (*p) |
790 | { | |
c77d647e JB |
791 | /* Since we know the path is absolute, we can assume that each |
792 | element starts with a "/". */ | |
793 | ||
794 | /* "//" anywhere isn't necessarily hairy; we just start afresh | |
795 | with the second slash. */ | |
570d7624 JB |
796 | if (p[0] == '/' && p[1] == '/' |
797 | #ifdef APOLLO | |
798 | /* // at start of filename is meaningful on Apollo system */ | |
799 | && nm != p | |
800 | #endif /* APOLLO */ | |
801 | ) | |
802 | nm = p + 1; | |
c77d647e JB |
803 | |
804 | /* "~" is hairy as the start of any path element. */ | |
570d7624 JB |
805 | if (p[0] == '/' && p[1] == '~') |
806 | nm = p + 1, lose = 1; | |
c77d647e JB |
807 | |
808 | /* "." and ".." are hairy. */ | |
809 | if (p[0] == '/' | |
810 | && p[1] == '.' | |
811 | && (p[2] == '/' | |
812 | || p[2] == 0 | |
813 | || (p[2] == '.' && (p[3] == '/' | |
814 | || p[3] == 0)))) | |
570d7624 JB |
815 | lose = 1; |
816 | #ifdef VMS | |
817 | if (p[0] == '\\') | |
818 | lose = 1; | |
819 | if (p[0] == '/') { | |
820 | /* if dev:[dir]/, move nm to / */ | |
821 | if (!slash && p > nm && (brack || colon)) { | |
822 | nm = (brack ? brack + 1 : colon + 1); | |
823 | lbrack = rbrack = 0; | |
824 | brack = 0; | |
825 | colon = 0; | |
826 | } | |
827 | slash = p; | |
828 | } | |
829 | if (p[0] == '-') | |
830 | #ifndef VMS4_4 | |
831 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
832 | if (lbrack == rbrack) | |
833 | { | |
834 | if (dots < 2) /* this is to allow negative version numbers */ | |
835 | p[0] = '_'; | |
836 | } | |
837 | else | |
838 | #endif /* VMS4_4 */ | |
839 | if (lbrack > rbrack && | |
840 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
841 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
842 | lose = 1; | |
843 | #ifndef VMS4_4 | |
844 | else | |
845 | p[0] = '_'; | |
846 | #endif /* VMS4_4 */ | |
847 | /* count open brackets, reset close bracket pointer */ | |
848 | if (p[0] == '[' || p[0] == '<') | |
849 | lbrack++, brack = 0; | |
850 | /* count close brackets, set close bracket pointer */ | |
851 | if (p[0] == ']' || p[0] == '>') | |
852 | rbrack++, brack = p; | |
853 | /* detect ][ or >< */ | |
854 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
855 | lose = 1; | |
856 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
857 | nm = p + 1, lose = 1; | |
858 | if (p[0] == ':' && (colon || slash)) | |
859 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
860 | if (brack) | |
861 | { | |
862 | nm = brack + 1; | |
863 | brack = 0; | |
864 | } | |
865 | /* if /pathname/dev:, move nm to dev: */ | |
866 | else if (slash) | |
867 | nm = slash + 1; | |
868 | /* if node::dev:, move colon following dev */ | |
869 | else if (colon && colon[-1] == ':') | |
870 | colon = p; | |
871 | /* if dev1:dev2:, move nm to dev2: */ | |
872 | else if (colon && colon[-1] != ':') | |
873 | { | |
874 | nm = colon + 1; | |
875 | colon = 0; | |
876 | } | |
877 | if (p[0] == ':' && !colon) | |
878 | { | |
879 | if (p[1] == ':') | |
880 | p++; | |
881 | colon = p; | |
882 | } | |
883 | if (lbrack == rbrack) | |
884 | if (p[0] == ';') | |
885 | dots = 2; | |
886 | else if (p[0] == '.') | |
887 | dots++; | |
888 | #endif /* VMS */ | |
889 | p++; | |
890 | } | |
891 | if (!lose) | |
892 | { | |
893 | #ifdef VMS | |
894 | if (index (nm, '/')) | |
895 | return build_string (sys_translate_unix (nm)); | |
896 | #endif /* VMS */ | |
4c3c22f3 | 897 | #ifndef MSDOS |
570d7624 JB |
898 | if (nm == XSTRING (name)->data) |
899 | return name; | |
900 | return build_string (nm); | |
4c3c22f3 | 901 | #endif |
570d7624 JB |
902 | } |
903 | } | |
904 | ||
905 | /* Now determine directory to start with and put it in newdir */ | |
906 | ||
907 | newdir = 0; | |
908 | ||
909 | if (nm[0] == '~') /* prefix ~ */ | |
c77d647e JB |
910 | { |
911 | if (nm[1] == '/' | |
570d7624 | 912 | #ifdef VMS |
c77d647e JB |
913 | || nm[1] == ':' |
914 | #endif /* VMS */ | |
915 | || nm[1] == 0) /* ~ by itself */ | |
916 | { | |
917 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
918 | newdir = (unsigned char *) ""; | |
4c3c22f3 RS |
919 | #ifdef MSDOS |
920 | dostounix_filename (newdir); | |
921 | #endif | |
c77d647e | 922 | nm++; |
570d7624 | 923 | #ifdef VMS |
c77d647e JB |
924 | nm++; /* Don't leave the slash in nm. */ |
925 | #endif /* VMS */ | |
926 | } | |
927 | else /* ~user/filename */ | |
928 | { | |
929 | for (p = nm; *p && (*p != '/' | |
570d7624 | 930 | #ifdef VMS |
c77d647e JB |
931 | && *p != ':' |
932 | #endif /* VMS */ | |
933 | ); p++); | |
934 | o = (unsigned char *) alloca (p - nm + 1); | |
935 | bcopy ((char *) nm, o, p - nm); | |
936 | o [p - nm] = 0; | |
937 | ||
938 | pw = (struct passwd *) getpwnam (o + 1); | |
939 | if (pw) | |
940 | { | |
941 | newdir = (unsigned char *) pw -> pw_dir; | |
570d7624 | 942 | #ifdef VMS |
c77d647e | 943 | nm = p + 1; /* skip the terminator */ |
570d7624 | 944 | #else |
c77d647e JB |
945 | nm = p; |
946 | #endif /* VMS */ | |
947 | } | |
e5d77022 | 948 | |
c77d647e JB |
949 | /* If we don't find a user of that name, leave the name |
950 | unchanged; don't move nm forward to p. */ | |
951 | } | |
952 | } | |
570d7624 JB |
953 | |
954 | if (nm[0] != '/' | |
955 | #ifdef VMS | |
956 | && !index (nm, ':') | |
957 | #endif /* not VMS */ | |
4c3c22f3 RS |
958 | #ifdef MSDOS |
959 | && drive == -1 | |
960 | #endif | |
570d7624 JB |
961 | && !newdir) |
962 | { | |
570d7624 JB |
963 | newdir = XSTRING (defalt)->data; |
964 | } | |
965 | ||
4c3c22f3 RS |
966 | #ifdef MSDOS |
967 | if (newdir == 0 && relpath) | |
968 | newdir = defdir; | |
969 | #endif | |
bfb61299 JB |
970 | if (newdir != 0) |
971 | { | |
972 | /* Get rid of any slash at the end of newdir. */ | |
973 | int length = strlen (newdir); | |
eabf01d4 RS |
974 | /* Adding `length > 1 &&' makes ~ expand into / when homedir |
975 | is the root dir. People disagree about whether that is right. | |
976 | Anyway, we can't take the risk of this change now. */ | |
4c3c22f3 RS |
977 | #ifdef MSDOS |
978 | if (newdir[1] != ':' && length > 1) | |
979 | #endif | |
eabf01d4 | 980 | if (newdir[length - 1] == '/') |
bfb61299 JB |
981 | { |
982 | unsigned char *temp = (unsigned char *) alloca (length); | |
983 | bcopy (newdir, temp, length - 1); | |
984 | temp[length - 1] = 0; | |
985 | newdir = temp; | |
986 | } | |
987 | tlen = length + 1; | |
988 | } | |
989 | else | |
990 | tlen = 0; | |
570d7624 | 991 | |
bfb61299 JB |
992 | /* Now concatenate the directory and name to new space in the stack frame */ |
993 | tlen += strlen (nm) + 1; | |
4c3c22f3 RS |
994 | #ifdef MSDOS |
995 | /* Add reserved space for drive name. */ | |
996 | target = (unsigned char *) alloca (tlen + 2) + 2; | |
997 | #else | |
570d7624 | 998 | target = (unsigned char *) alloca (tlen); |
4c3c22f3 | 999 | #endif |
570d7624 JB |
1000 | *target = 0; |
1001 | ||
1002 | if (newdir) | |
1003 | { | |
1004 | #ifndef VMS | |
1005 | if (nm[0] == 0 || nm[0] == '/') | |
1006 | strcpy (target, newdir); | |
1007 | else | |
1008 | #endif | |
c77d647e | 1009 | file_name_as_directory (target, newdir); |
570d7624 JB |
1010 | } |
1011 | ||
1012 | strcat (target, nm); | |
1013 | #ifdef VMS | |
1014 | if (index (target, '/')) | |
1015 | strcpy (target, sys_translate_unix (target)); | |
1016 | #endif /* VMS */ | |
1017 | ||
c77d647e | 1018 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
570d7624 JB |
1019 | |
1020 | p = target; | |
1021 | o = target; | |
1022 | ||
1023 | while (*p) | |
1024 | { | |
1025 | #ifdef VMS | |
1026 | if (*p != ']' && *p != '>' && *p != '-') | |
1027 | { | |
1028 | if (*p == '\\') | |
1029 | p++; | |
1030 | *o++ = *p++; | |
1031 | } | |
1032 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
1033 | /* brackets are offset from each other by 2 */ | |
1034 | { | |
1035 | p += 2; | |
1036 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
1037 | /* convert [foo][bar] to [bar] */ | |
1038 | while (o[-1] != '[' && o[-1] != '<') | |
1039 | o--; | |
1040 | else if (*p == '-' && *o != '.') | |
1041 | *--p = '.'; | |
1042 | } | |
1043 | else if (p[0] == '-' && o[-1] == '.' && | |
1044 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
1045 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
1046 | { | |
1047 | do | |
1048 | o--; | |
1049 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
1050 | if (p[1] == '.') /* foo.-.bar ==> bar*/ | |
1051 | p += 2; | |
1052 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
1053 | p++, o--; | |
1054 | /* else [foo.-] ==> [-] */ | |
1055 | } | |
1056 | else | |
1057 | { | |
1058 | #ifndef VMS4_4 | |
1059 | if (*p == '-' && | |
1060 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
1061 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
1062 | *p = '_'; | |
1063 | #endif /* VMS4_4 */ | |
1064 | *o++ = *p++; | |
1065 | } | |
1066 | #else /* not VMS */ | |
1067 | if (*p != '/') | |
1068 | { | |
1069 | *o++ = *p++; | |
1070 | } | |
1071 | else if (!strncmp (p, "//", 2) | |
1072 | #ifdef APOLLO | |
1073 | /* // at start of filename is meaningful in Apollo system */ | |
1074 | && o != target | |
1075 | #endif /* APOLLO */ | |
1076 | ) | |
1077 | { | |
1078 | o = target; | |
1079 | p++; | |
1080 | } | |
c77d647e JB |
1081 | else if (p[0] == '/' |
1082 | && p[1] == '.' | |
1083 | && (p[2] == '/' | |
1084 | || p[2] == 0)) | |
1085 | { | |
1086 | /* If "/." is the entire filename, keep the "/". Otherwise, | |
1087 | just delete the whole "/.". */ | |
1088 | if (o == target && p[2] == '\0') | |
1089 | *o++ = *p; | |
1090 | p += 2; | |
1091 | } | |
570d7624 JB |
1092 | else if (!strncmp (p, "/..", 3) |
1093 | /* `/../' is the "superroot" on certain file systems. */ | |
1094 | && o != target | |
1095 | && (p[3] == '/' || p[3] == 0)) | |
1096 | { | |
1097 | while (o != target && *--o != '/') | |
1098 | ; | |
1099 | #ifdef APOLLO | |
1100 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') | |
1101 | ++o; | |
1102 | else | |
1103 | #endif /* APOLLO */ | |
1104 | if (o == target && *o == '/') | |
1105 | ++o; | |
1106 | p += 3; | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | *o++ = *p++; | |
1111 | } | |
1112 | #endif /* not VMS */ | |
1113 | } | |
1114 | ||
4c3c22f3 RS |
1115 | #ifdef MSDOS |
1116 | /* at last, set drive name. */ | |
1117 | if (target[1] != ':') | |
1118 | { | |
1119 | target -= 2; | |
1120 | target[0] = (drive < 0 ? getdisk () : drive) + 'a'; | |
1121 | target[1] = ':'; | |
1122 | } | |
1123 | #endif | |
1124 | ||
570d7624 JB |
1125 | return make_string (target, o - target); |
1126 | } | |
1127 | #if 0 | |
e5d77022 JB |
1128 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. |
1129 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
570d7624 JB |
1130 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
1131 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
1132 | (does not start with slash); if DEFAULT is nil or missing,\n\ | |
1133 | the current buffer's value of default-directory is used.\n\ | |
1134 | Filenames containing `.' or `..' as components are simplified;\n\ | |
1135 | initial `~/' expands to your home directory.\n\ | |
1136 | See also the function `substitute-in-file-name'.") | |
1137 | (name, defalt) | |
1138 | Lisp_Object name, defalt; | |
1139 | { | |
1140 | unsigned char *nm; | |
1141 | ||
1142 | register unsigned char *newdir, *p, *o; | |
1143 | int tlen; | |
1144 | unsigned char *target; | |
1145 | struct passwd *pw; | |
1146 | int lose; | |
1147 | #ifdef VMS | |
1148 | unsigned char * colon = 0; | |
1149 | unsigned char * close = 0; | |
1150 | unsigned char * slash = 0; | |
1151 | unsigned char * brack = 0; | |
1152 | int lbrack = 0, rbrack = 0; | |
1153 | int dots = 0; | |
1154 | #endif /* VMS */ | |
1155 | ||
1156 | CHECK_STRING (name, 0); | |
1157 | ||
1158 | #ifdef VMS | |
1159 | /* Filenames on VMS are always upper case. */ | |
1160 | name = Fupcase (name); | |
1161 | #endif | |
1162 | ||
1163 | nm = XSTRING (name)->data; | |
1164 | ||
1165 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
1166 | If no /./ or /../ we can return right away. */ | |
1167 | if ( | |
1168 | nm[0] == '/' | |
1169 | #ifdef VMS | |
1170 | || index (nm, ':') | |
1171 | #endif /* VMS */ | |
1172 | ) | |
1173 | { | |
1174 | p = nm; | |
1175 | lose = 0; | |
1176 | while (*p) | |
1177 | { | |
1178 | if (p[0] == '/' && p[1] == '/' | |
1179 | #ifdef APOLLO | |
1180 | /* // at start of filename is meaningful on Apollo system */ | |
1181 | && nm != p | |
1182 | #endif /* APOLLO */ | |
1183 | ) | |
1184 | nm = p + 1; | |
1185 | if (p[0] == '/' && p[1] == '~') | |
1186 | nm = p + 1, lose = 1; | |
1187 | if (p[0] == '/' && p[1] == '.' | |
1188 | && (p[2] == '/' || p[2] == 0 | |
1189 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
1190 | lose = 1; | |
1191 | #ifdef VMS | |
1192 | if (p[0] == '\\') | |
1193 | lose = 1; | |
1194 | if (p[0] == '/') { | |
1195 | /* if dev:[dir]/, move nm to / */ | |
1196 | if (!slash && p > nm && (brack || colon)) { | |
1197 | nm = (brack ? brack + 1 : colon + 1); | |
1198 | lbrack = rbrack = 0; | |
1199 | brack = 0; | |
1200 | colon = 0; | |
1201 | } | |
1202 | slash = p; | |
1203 | } | |
1204 | if (p[0] == '-') | |
1205 | #ifndef VMS4_4 | |
1206 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
1207 | if (lbrack == rbrack) | |
1208 | { | |
1209 | if (dots < 2) /* this is to allow negative version numbers */ | |
1210 | p[0] = '_'; | |
1211 | } | |
1212 | else | |
1213 | #endif /* VMS4_4 */ | |
1214 | if (lbrack > rbrack && | |
1215 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
1216 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
1217 | lose = 1; | |
1218 | #ifndef VMS4_4 | |
1219 | else | |
1220 | p[0] = '_'; | |
1221 | #endif /* VMS4_4 */ | |
1222 | /* count open brackets, reset close bracket pointer */ | |
1223 | if (p[0] == '[' || p[0] == '<') | |
1224 | lbrack++, brack = 0; | |
1225 | /* count close brackets, set close bracket pointer */ | |
1226 | if (p[0] == ']' || p[0] == '>') | |
1227 | rbrack++, brack = p; | |
1228 | /* detect ][ or >< */ | |
1229 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
1230 | lose = 1; | |
1231 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
1232 | nm = p + 1, lose = 1; | |
1233 | if (p[0] == ':' && (colon || slash)) | |
1234 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
1235 | if (brack) | |
1236 | { | |
1237 | nm = brack + 1; | |
1238 | brack = 0; | |
1239 | } | |
1240 | /* if /pathname/dev:, move nm to dev: */ | |
1241 | else if (slash) | |
1242 | nm = slash + 1; | |
1243 | /* if node::dev:, move colon following dev */ | |
1244 | else if (colon && colon[-1] == ':') | |
1245 | colon = p; | |
1246 | /* if dev1:dev2:, move nm to dev2: */ | |
1247 | else if (colon && colon[-1] != ':') | |
1248 | { | |
1249 | nm = colon + 1; | |
1250 | colon = 0; | |
1251 | } | |
1252 | if (p[0] == ':' && !colon) | |
1253 | { | |
1254 | if (p[1] == ':') | |
1255 | p++; | |
1256 | colon = p; | |
1257 | } | |
1258 | if (lbrack == rbrack) | |
1259 | if (p[0] == ';') | |
1260 | dots = 2; | |
1261 | else if (p[0] == '.') | |
1262 | dots++; | |
1263 | #endif /* VMS */ | |
1264 | p++; | |
1265 | } | |
1266 | if (!lose) | |
1267 | { | |
1268 | #ifdef VMS | |
1269 | if (index (nm, '/')) | |
1270 | return build_string (sys_translate_unix (nm)); | |
1271 | #endif /* VMS */ | |
1272 | if (nm == XSTRING (name)->data) | |
1273 | return name; | |
1274 | return build_string (nm); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | /* Now determine directory to start with and put it in NEWDIR */ | |
1279 | ||
1280 | newdir = 0; | |
1281 | ||
1282 | if (nm[0] == '~') /* prefix ~ */ | |
1283 | if (nm[1] == '/' | |
1284 | #ifdef VMS | |
1285 | || nm[1] == ':' | |
1286 | #endif /* VMS */ | |
1287 | || nm[1] == 0)/* ~/filename */ | |
1288 | { | |
1289 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1290 | newdir = (unsigned char *) ""; | |
1291 | nm++; | |
1292 | #ifdef VMS | |
1293 | nm++; /* Don't leave the slash in nm. */ | |
1294 | #endif /* VMS */ | |
1295 | } | |
1296 | else /* ~user/filename */ | |
1297 | { | |
1298 | /* Get past ~ to user */ | |
1299 | unsigned char *user = nm + 1; | |
1300 | /* Find end of name. */ | |
1301 | unsigned char *ptr = (unsigned char *) index (user, '/'); | |
1302 | int len = ptr ? ptr - user : strlen (user); | |
1303 | #ifdef VMS | |
1304 | unsigned char *ptr1 = index (user, ':'); | |
1305 | if (ptr1 != 0 && ptr1 - user < len) | |
1306 | len = ptr1 - user; | |
1307 | #endif /* VMS */ | |
1308 | /* Copy the user name into temp storage. */ | |
1309 | o = (unsigned char *) alloca (len + 1); | |
1310 | bcopy ((char *) user, o, len); | |
1311 | o[len] = 0; | |
1312 | ||
1313 | /* Look up the user name. */ | |
1314 | pw = (struct passwd *) getpwnam (o + 1); | |
1315 | if (!pw) | |
1316 | error ("\"%s\" isn't a registered user", o + 1); | |
1317 | ||
1318 | newdir = (unsigned char *) pw->pw_dir; | |
1319 | ||
1320 | /* Discard the user name from NM. */ | |
1321 | nm += len; | |
1322 | } | |
1323 | ||
1324 | if (nm[0] != '/' | |
1325 | #ifdef VMS | |
1326 | && !index (nm, ':') | |
1327 | #endif /* not VMS */ | |
1328 | && !newdir) | |
1329 | { | |
265a9e55 | 1330 | if (NILP (defalt)) |
570d7624 JB |
1331 | defalt = current_buffer->directory; |
1332 | CHECK_STRING (defalt, 1); | |
1333 | newdir = XSTRING (defalt)->data; | |
1334 | } | |
1335 | ||
1336 | /* Now concatenate the directory and name to new space in the stack frame */ | |
1337 | ||
1338 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
1339 | target = (unsigned char *) alloca (tlen); | |
1340 | *target = 0; | |
1341 | ||
1342 | if (newdir) | |
1343 | { | |
1344 | #ifndef VMS | |
1345 | if (nm[0] == 0 || nm[0] == '/') | |
1346 | strcpy (target, newdir); | |
1347 | else | |
1348 | #endif | |
1349 | file_name_as_directory (target, newdir); | |
1350 | } | |
1351 | ||
1352 | strcat (target, nm); | |
1353 | #ifdef VMS | |
1354 | if (index (target, '/')) | |
1355 | strcpy (target, sys_translate_unix (target)); | |
1356 | #endif /* VMS */ | |
1357 | ||
1358 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
1359 | ||
1360 | p = target; | |
1361 | o = target; | |
1362 | ||
1363 | while (*p) | |
1364 | { | |
1365 | #ifdef VMS | |
1366 | if (*p != ']' && *p != '>' && *p != '-') | |
1367 | { | |
1368 | if (*p == '\\') | |
1369 | p++; | |
1370 | *o++ = *p++; | |
1371 | } | |
1372 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
1373 | /* brackets are offset from each other by 2 */ | |
1374 | { | |
1375 | p += 2; | |
1376 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
1377 | /* convert [foo][bar] to [bar] */ | |
1378 | while (o[-1] != '[' && o[-1] != '<') | |
1379 | o--; | |
1380 | else if (*p == '-' && *o != '.') | |
1381 | *--p = '.'; | |
1382 | } | |
1383 | else if (p[0] == '-' && o[-1] == '.' && | |
1384 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
1385 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
1386 | { | |
1387 | do | |
1388 | o--; | |
1389 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
1390 | if (p[1] == '.') /* foo.-.bar ==> bar*/ | |
1391 | p += 2; | |
1392 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
1393 | p++, o--; | |
1394 | /* else [foo.-] ==> [-] */ | |
1395 | } | |
1396 | else | |
1397 | { | |
1398 | #ifndef VMS4_4 | |
1399 | if (*p == '-' && | |
1400 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
1401 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
1402 | *p = '_'; | |
1403 | #endif /* VMS4_4 */ | |
1404 | *o++ = *p++; | |
1405 | } | |
1406 | #else /* not VMS */ | |
1407 | if (*p != '/') | |
1408 | { | |
1409 | *o++ = *p++; | |
1410 | } | |
1411 | else if (!strncmp (p, "//", 2) | |
1412 | #ifdef APOLLO | |
1413 | /* // at start of filename is meaningful in Apollo system */ | |
1414 | && o != target | |
1415 | #endif /* APOLLO */ | |
1416 | ) | |
1417 | { | |
1418 | o = target; | |
1419 | p++; | |
1420 | } | |
1421 | else if (p[0] == '/' && p[1] == '.' && | |
1422 | (p[2] == '/' || p[2] == 0)) | |
1423 | p += 2; | |
1424 | else if (!strncmp (p, "/..", 3) | |
1425 | /* `/../' is the "superroot" on certain file systems. */ | |
1426 | && o != target | |
1427 | && (p[3] == '/' || p[3] == 0)) | |
1428 | { | |
1429 | while (o != target && *--o != '/') | |
1430 | ; | |
1431 | #ifdef APOLLO | |
1432 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') | |
1433 | ++o; | |
1434 | else | |
1435 | #endif /* APOLLO */ | |
1436 | if (o == target && *o == '/') | |
1437 | ++o; | |
1438 | p += 3; | |
1439 | } | |
1440 | else | |
1441 | { | |
1442 | *o++ = *p++; | |
1443 | } | |
1444 | #endif /* not VMS */ | |
1445 | } | |
1446 | ||
1447 | return make_string (target, o - target); | |
1448 | } | |
1449 | #endif | |
1450 | \f | |
1451 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, | |
1452 | Ssubstitute_in_file_name, 1, 1, 0, | |
1453 | "Substitute environment variables referred to in FILENAME.\n\ | |
1454 | `$FOO' where FOO is an environment variable name means to substitute\n\ | |
1455 | the value of that variable. The variable name should be terminated\n\ | |
1456 | with a character not a letter, digit or underscore; otherwise, enclose\n\ | |
1457 | the entire variable name in braces.\n\ | |
1458 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ | |
1459 | On VMS, `$' substitution is not done; this function does little and only\n\ | |
1460 | duplicates what `expand-file-name' does.") | |
1461 | (string) | |
1462 | Lisp_Object string; | |
1463 | { | |
1464 | unsigned char *nm; | |
1465 | ||
1466 | register unsigned char *s, *p, *o, *x, *endp; | |
1467 | unsigned char *target; | |
1468 | int total = 0; | |
1469 | int substituted = 0; | |
1470 | unsigned char *xnm; | |
1471 | ||
1472 | CHECK_STRING (string, 0); | |
1473 | ||
1474 | nm = XSTRING (string)->data; | |
1475 | endp = nm + XSTRING (string)->size; | |
1476 | ||
1477 | /* If /~ or // appears, discard everything through first slash. */ | |
1478 | ||
1479 | for (p = nm; p != endp; p++) | |
1480 | { | |
1481 | if ((p[0] == '~' || | |
1482 | #ifdef APOLLO | |
1483 | /* // at start of file name is meaningful in Apollo system */ | |
1484 | (p[0] == '/' && p - 1 != nm) | |
1485 | #else /* not APOLLO */ | |
1486 | p[0] == '/' | |
1487 | #endif /* not APOLLO */ | |
1488 | ) | |
1489 | && p != nm && | |
1490 | #ifdef VMS | |
1491 | (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' || | |
1492 | #endif /* VMS */ | |
1493 | p[-1] == '/') | |
1494 | #ifdef VMS | |
1495 | ) | |
1496 | #endif /* VMS */ | |
1497 | { | |
1498 | nm = p; | |
1499 | substituted = 1; | |
1500 | } | |
4c3c22f3 RS |
1501 | #ifdef MSDOS |
1502 | if (p[0] && p[1] == ':') | |
1503 | { | |
1504 | nm = p; | |
1505 | substituted = 1; | |
1506 | } | |
1507 | #endif /* MSDOS */ | |
570d7624 JB |
1508 | } |
1509 | ||
1510 | #ifdef VMS | |
1511 | return build_string (nm); | |
1512 | #else | |
1513 | ||
1514 | /* See if any variables are substituted into the string | |
1515 | and find the total length of their values in `total' */ | |
1516 | ||
1517 | for (p = nm; p != endp;) | |
1518 | if (*p != '$') | |
1519 | p++; | |
1520 | else | |
1521 | { | |
1522 | p++; | |
1523 | if (p == endp) | |
1524 | goto badsubst; | |
1525 | else if (*p == '$') | |
1526 | { | |
1527 | /* "$$" means a single "$" */ | |
1528 | p++; | |
1529 | total -= 1; | |
1530 | substituted = 1; | |
1531 | continue; | |
1532 | } | |
1533 | else if (*p == '{') | |
1534 | { | |
1535 | o = ++p; | |
1536 | while (p != endp && *p != '}') p++; | |
1537 | if (*p != '}') goto missingclose; | |
1538 | s = p; | |
1539 | } | |
1540 | else | |
1541 | { | |
1542 | o = p; | |
1543 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1544 | s = p; | |
1545 | } | |
1546 | ||
1547 | /* Copy out the variable name */ | |
1548 | target = (unsigned char *) alloca (s - o + 1); | |
1549 | strncpy (target, o, s - o); | |
1550 | target[s - o] = 0; | |
4c3c22f3 RS |
1551 | #ifdef MSDOS |
1552 | strupr (target); /* $home == $HOME etc. */ | |
1553 | #endif | |
570d7624 JB |
1554 | |
1555 | /* Get variable value */ | |
1556 | o = (unsigned char *) egetenv (target); | |
570d7624 JB |
1557 | if (!o) goto badvar; |
1558 | total += strlen (o); | |
1559 | substituted = 1; | |
1560 | } | |
1561 | ||
1562 | if (!substituted) | |
1563 | return string; | |
1564 | ||
1565 | /* If substitution required, recopy the string and do it */ | |
1566 | /* Make space in stack frame for the new copy */ | |
1567 | xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1); | |
1568 | x = xnm; | |
1569 | ||
1570 | /* Copy the rest of the name through, replacing $ constructs with values */ | |
1571 | for (p = nm; *p;) | |
1572 | if (*p != '$') | |
1573 | *x++ = *p++; | |
1574 | else | |
1575 | { | |
1576 | p++; | |
1577 | if (p == endp) | |
1578 | goto badsubst; | |
1579 | else if (*p == '$') | |
1580 | { | |
1581 | *x++ = *p++; | |
1582 | continue; | |
1583 | } | |
1584 | else if (*p == '{') | |
1585 | { | |
1586 | o = ++p; | |
1587 | while (p != endp && *p != '}') p++; | |
1588 | if (*p != '}') goto missingclose; | |
1589 | s = p++; | |
1590 | } | |
1591 | else | |
1592 | { | |
1593 | o = p; | |
1594 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1595 | s = p; | |
1596 | } | |
1597 | ||
1598 | /* Copy out the variable name */ | |
1599 | target = (unsigned char *) alloca (s - o + 1); | |
1600 | strncpy (target, o, s - o); | |
1601 | target[s - o] = 0; | |
4c3c22f3 RS |
1602 | #ifdef MSDOS |
1603 | strupr (target); /* $home == $HOME etc. */ | |
1604 | #endif | |
570d7624 JB |
1605 | |
1606 | /* Get variable value */ | |
1607 | o = (unsigned char *) egetenv (target); | |
570d7624 JB |
1608 | if (!o) |
1609 | goto badvar; | |
1610 | ||
1611 | strcpy (x, o); | |
1612 | x += strlen (o); | |
1613 | } | |
1614 | ||
1615 | *x = 0; | |
1616 | ||
1617 | /* If /~ or // appears, discard everything through first slash. */ | |
1618 | ||
1619 | for (p = xnm; p != x; p++) | |
1620 | if ((p[0] == '~' || | |
1621 | #ifdef APOLLO | |
1622 | /* // at start of file name is meaningful in Apollo system */ | |
1623 | (p[0] == '/' && p - 1 != xnm) | |
1624 | #else /* not APOLLO */ | |
1625 | p[0] == '/' | |
1626 | #endif /* not APOLLO */ | |
1627 | ) | |
1628 | && p != nm && p[-1] == '/') | |
1629 | xnm = p; | |
4c3c22f3 RS |
1630 | #ifdef MSDOS |
1631 | else if (p[0] && p[1] == ':') | |
1632 | xnm = p; | |
1633 | #endif | |
570d7624 JB |
1634 | |
1635 | return make_string (xnm, x - xnm); | |
1636 | ||
1637 | badsubst: | |
1638 | error ("Bad format environment-variable substitution"); | |
1639 | missingclose: | |
1640 | error ("Missing \"}\" in environment-variable substitution"); | |
1641 | badvar: | |
1642 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1643 | ||
1644 | /* NOTREACHED */ | |
1645 | #endif /* not VMS */ | |
1646 | } | |
1647 | \f | |
067ffa38 | 1648 | /* A slightly faster and more convenient way to get |
298b760e | 1649 | (directory-file-name (expand-file-name FOO)). */ |
067ffa38 | 1650 | |
570d7624 JB |
1651 | Lisp_Object |
1652 | expand_and_dir_to_file (filename, defdir) | |
1653 | Lisp_Object filename, defdir; | |
1654 | { | |
1655 | register Lisp_Object abspath; | |
1656 | ||
1657 | abspath = Fexpand_file_name (filename, defdir); | |
1658 | #ifdef VMS | |
1659 | { | |
1660 | register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1]; | |
1661 | if (c == ':' || c == ']' || c == '>') | |
1662 | abspath = Fdirectory_file_name (abspath); | |
1663 | } | |
1664 | #else | |
1665 | /* Remove final slash, if any (unless path is root). | |
1666 | stat behaves differently depending! */ | |
1667 | if (XSTRING (abspath)->size > 1 | |
1668 | && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/') | |
ddc61f46 RS |
1669 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
1670 | abspath = Fdirectory_file_name (abspath); | |
570d7624 JB |
1671 | #endif |
1672 | return abspath; | |
1673 | } | |
1674 | \f | |
1675 | barf_or_query_if_file_exists (absname, querystring, interactive) | |
1676 | Lisp_Object absname; | |
1677 | unsigned char *querystring; | |
1678 | int interactive; | |
1679 | { | |
1680 | register Lisp_Object tem; | |
1681 | struct gcpro gcpro1; | |
1682 | ||
1683 | if (access (XSTRING (absname)->data, 4) >= 0) | |
1684 | { | |
1685 | if (! interactive) | |
1686 | Fsignal (Qfile_already_exists, | |
1687 | Fcons (build_string ("File already exists"), | |
1688 | Fcons (absname, Qnil))); | |
1689 | GCPRO1 (absname); | |
1690 | tem = do_yes_or_no_p (format1 ("File %s already exists; %s anyway? ", | |
1691 | XSTRING (absname)->data, querystring)); | |
1692 | UNGCPRO; | |
265a9e55 | 1693 | if (NILP (tem)) |
570d7624 JB |
1694 | Fsignal (Qfile_already_exists, |
1695 | Fcons (build_string ("File already exists"), | |
1696 | Fcons (absname, Qnil))); | |
1697 | } | |
1698 | return; | |
1699 | } | |
1700 | ||
1701 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, | |
349a7710 | 1702 | "fCopy file: \nFCopy %s to file: \np\nP", |
570d7624 JB |
1703 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
1704 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ | |
1705 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ | |
1706 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1707 | This is what happens in interactive use with M-x.\n\ | |
349a7710 JB |
1708 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
1709 | last-modified time as the old one. (This works on only some systems.)\n\ | |
1710 | A prefix arg makes KEEP-TIME non-nil.") | |
570d7624 JB |
1711 | (filename, newname, ok_if_already_exists, keep_date) |
1712 | Lisp_Object filename, newname, ok_if_already_exists, keep_date; | |
1713 | { | |
1714 | int ifd, ofd, n; | |
1715 | char buf[16 * 1024]; | |
1716 | struct stat st; | |
32f4334d | 1717 | Lisp_Object handler; |
570d7624 | 1718 | struct gcpro gcpro1, gcpro2; |
b5148e85 | 1719 | int count = specpdl_ptr - specpdl; |
51cf6d37 | 1720 | Lisp_Object args[6]; |
f73b0ada | 1721 | int input_file_statable_p; |
570d7624 JB |
1722 | |
1723 | GCPRO2 (filename, newname); | |
1724 | CHECK_STRING (filename, 0); | |
1725 | CHECK_STRING (newname, 1); | |
1726 | filename = Fexpand_file_name (filename, Qnil); | |
1727 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d | 1728 | |
0bf2eed2 | 1729 | /* If the input file name has special constructs in it, |
32f4334d | 1730 | call the corresponding file handler. */ |
642ef245 | 1731 | handler = Ffind_file_name_handler (filename); |
0bf2eed2 | 1732 | /* Likewise for output file name. */ |
51cf6d37 RS |
1733 | if (NILP (handler)) |
1734 | handler = Ffind_file_name_handler (newname); | |
32f4334d | 1735 | if (!NILP (handler)) |
36712b0a KH |
1736 | RETURN_UNGCPRO (call5 (handler, Qcopy_file, filename, newname, |
1737 | ok_if_already_exists, keep_date)); | |
32f4334d | 1738 | |
265a9e55 | 1739 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1740 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1741 | barf_or_query_if_file_exists (newname, "copy to it", | |
1742 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1743 | ||
1744 | ifd = open (XSTRING (filename)->data, 0); | |
1745 | if (ifd < 0) | |
1746 | report_file_error ("Opening input file", Fcons (filename, Qnil)); | |
1747 | ||
b5148e85 RS |
1748 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1749 | ||
f73b0ada BF |
1750 | /* We can only copy regular files and symbolic links. Other files are not |
1751 | copyable by us. */ | |
1752 | input_file_statable_p = (fstat (ifd, &st) >= 0); | |
1753 | ||
1754 | #if defined (S_ISREG) && defined (S_ISLNK) | |
1755 | if (input_file_statable_p) | |
1756 | { | |
1757 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) | |
1758 | { | |
1759 | #if defined (EISDIR) | |
1760 | /* Get a better looking error message. */ | |
1761 | errno = EISDIR; | |
1762 | #endif /* EISDIR */ | |
1763 | report_file_error ("Non-regular file", Fcons (filename, Qnil)); | |
1764 | } | |
1765 | } | |
1766 | #endif /* S_ISREG && S_ISLNK */ | |
1767 | ||
570d7624 JB |
1768 | #ifdef VMS |
1769 | /* Create the copy file with the same record format as the input file */ | |
1770 | ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); | |
1771 | #else | |
4c3c22f3 RS |
1772 | #ifdef MSDOS |
1773 | /* System's default file type was set to binary by _fmode in emacs.c. */ | |
1774 | ofd = creat (XSTRING (newname)->data, S_IREAD | S_IWRITE); | |
1775 | #else /* not MSDOS */ | |
570d7624 | 1776 | ofd = creat (XSTRING (newname)->data, 0666); |
4c3c22f3 | 1777 | #endif /* not MSDOS */ |
570d7624 JB |
1778 | #endif /* VMS */ |
1779 | if (ofd < 0) | |
66331187 | 1780 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
1781 | |
1782 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 1783 | |
b5148e85 RS |
1784 | immediate_quit = 1; |
1785 | QUIT; | |
570d7624 JB |
1786 | while ((n = read (ifd, buf, sizeof buf)) > 0) |
1787 | if (write (ofd, buf, n) != n) | |
66331187 | 1788 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 1789 | immediate_quit = 0; |
570d7624 | 1790 | |
f73b0ada | 1791 | if (input_file_statable_p) |
570d7624 | 1792 | { |
265a9e55 | 1793 | if (!NILP (keep_date)) |
570d7624 | 1794 | { |
de5bf5d3 JB |
1795 | EMACS_TIME atime, mtime; |
1796 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
1797 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
1798 | EMACS_SET_UTIMES (XSTRING (newname)->data, atime, mtime); | |
570d7624 | 1799 | } |
570d7624 JB |
1800 | #ifdef APOLLO |
1801 | if (!egetenv ("USE_DOMAIN_ACLS")) | |
1802 | #endif | |
de5bf5d3 | 1803 | chmod (XSTRING (newname)->data, st.st_mode & 07777); |
570d7624 JB |
1804 | } |
1805 | ||
b5148e85 RS |
1806 | /* Discard the unwind protects. */ |
1807 | specpdl_ptr = specpdl + count; | |
1808 | ||
570d7624 JB |
1809 | close (ifd); |
1810 | if (close (ofd) < 0) | |
1811 | report_file_error ("I/O error", Fcons (newname, Qnil)); | |
1812 | ||
1813 | UNGCPRO; | |
1814 | return Qnil; | |
1815 | } | |
1816 | ||
9bbe01fb | 1817 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
353cfc19 | 1818 | Smake_directory_internal, 1, 1, 0, |
570d7624 JB |
1819 | "Create a directory. One argument, a file name string.") |
1820 | (dirname) | |
1821 | Lisp_Object dirname; | |
1822 | { | |
1823 | unsigned char *dir; | |
32f4334d | 1824 | Lisp_Object handler; |
570d7624 JB |
1825 | |
1826 | CHECK_STRING (dirname, 0); | |
1827 | dirname = Fexpand_file_name (dirname, Qnil); | |
32f4334d | 1828 | |
642ef245 | 1829 | handler = Ffind_file_name_handler (dirname); |
32f4334d | 1830 | if (!NILP (handler)) |
9bbe01fb RS |
1831 | return call3 (handler, Qmake_directory, dirname, Qnil); |
1832 | ||
570d7624 JB |
1833 | dir = XSTRING (dirname)->data; |
1834 | ||
1835 | if (mkdir (dir, 0777) != 0) | |
1836 | report_file_error ("Creating directory", Flist (1, &dirname)); | |
1837 | ||
32f4334d | 1838 | return Qnil; |
570d7624 JB |
1839 | } |
1840 | ||
aa734e17 RS |
1841 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
1842 | "Delete a directory. One argument, a file name string.") | |
570d7624 JB |
1843 | (dirname) |
1844 | Lisp_Object dirname; | |
1845 | { | |
1846 | unsigned char *dir; | |
32f4334d | 1847 | Lisp_Object handler; |
570d7624 JB |
1848 | |
1849 | CHECK_STRING (dirname, 0); | |
1850 | dirname = Fexpand_file_name (dirname, Qnil); | |
1851 | dir = XSTRING (dirname)->data; | |
1852 | ||
642ef245 | 1853 | handler = Ffind_file_name_handler (dirname); |
32f4334d RS |
1854 | if (!NILP (handler)) |
1855 | return call2 (handler, Qdelete_directory, dirname); | |
1856 | ||
570d7624 JB |
1857 | if (rmdir (dir) != 0) |
1858 | report_file_error ("Removing directory", Flist (1, &dirname)); | |
1859 | ||
1860 | return Qnil; | |
1861 | } | |
1862 | ||
1863 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", | |
1864 | "Delete specified file. One argument, a file name string.\n\ | |
1865 | If file has multiple names, it continues to exist with the other names.") | |
1866 | (filename) | |
1867 | Lisp_Object filename; | |
1868 | { | |
32f4334d | 1869 | Lisp_Object handler; |
570d7624 JB |
1870 | CHECK_STRING (filename, 0); |
1871 | filename = Fexpand_file_name (filename, Qnil); | |
32f4334d | 1872 | |
642ef245 | 1873 | handler = Ffind_file_name_handler (filename); |
32f4334d RS |
1874 | if (!NILP (handler)) |
1875 | return call2 (handler, Qdelete_file, filename); | |
1876 | ||
570d7624 JB |
1877 | if (0 > unlink (XSTRING (filename)->data)) |
1878 | report_file_error ("Removing old name", Flist (1, &filename)); | |
1879 | return Qnil; | |
1880 | } | |
1881 | ||
1882 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, | |
1883 | "fRename file: \nFRename %s to file: \np", | |
1884 | "Rename FILE as NEWNAME. Both args strings.\n\ | |
1885 | If file has names other than FILE, it continues to have those names.\n\ | |
1886 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
1887 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
1888 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1889 | This is what happens in interactive use with M-x.") | |
1890 | (filename, newname, ok_if_already_exists) | |
1891 | Lisp_Object filename, newname, ok_if_already_exists; | |
1892 | { | |
1893 | #ifdef NO_ARG_ARRAY | |
1894 | Lisp_Object args[2]; | |
1895 | #endif | |
32f4334d | 1896 | Lisp_Object handler; |
570d7624 JB |
1897 | struct gcpro gcpro1, gcpro2; |
1898 | ||
1899 | GCPRO2 (filename, newname); | |
1900 | CHECK_STRING (filename, 0); | |
1901 | CHECK_STRING (newname, 1); | |
1902 | filename = Fexpand_file_name (filename, Qnil); | |
1903 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
1904 | |
1905 | /* If the file name has special constructs in it, | |
1906 | call the corresponding file handler. */ | |
642ef245 | 1907 | handler = Ffind_file_name_handler (filename); |
51cf6d37 RS |
1908 | if (NILP (handler)) |
1909 | handler = Ffind_file_name_handler (newname); | |
32f4334d | 1910 | if (!NILP (handler)) |
36712b0a KH |
1911 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
1912 | filename, newname, ok_if_already_exists)); | |
32f4334d | 1913 | |
265a9e55 | 1914 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1915 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1916 | barf_or_query_if_file_exists (newname, "rename to it", | |
1917 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1918 | #ifndef BSD4_1 | |
1919 | if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data)) | |
1920 | #else | |
1921 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data) | |
1922 | || 0 > unlink (XSTRING (filename)->data)) | |
1923 | #endif | |
1924 | { | |
1925 | if (errno == EXDEV) | |
1926 | { | |
d093c3ac RM |
1927 | Fcopy_file (filename, newname, |
1928 | /* We have already prompted if it was an integer, | |
1929 | so don't have copy-file prompt again. */ | |
1930 | NILP (ok_if_already_exists) ? Qnil : Qt, Qt); | |
570d7624 JB |
1931 | Fdelete_file (filename); |
1932 | } | |
1933 | else | |
1934 | #ifdef NO_ARG_ARRAY | |
1935 | { | |
1936 | args[0] = filename; | |
1937 | args[1] = newname; | |
1938 | report_file_error ("Renaming", Flist (2, args)); | |
1939 | } | |
1940 | #else | |
1941 | report_file_error ("Renaming", Flist (2, &filename)); | |
1942 | #endif | |
1943 | } | |
1944 | UNGCPRO; | |
1945 | return Qnil; | |
1946 | } | |
1947 | ||
1948 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
1949 | "fAdd name to file: \nFName to add to %s: \np", | |
1950 | "Give FILE additional name NEWNAME. Both args strings.\n\ | |
1951 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
1952 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
1953 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1954 | This is what happens in interactive use with M-x.") | |
1955 | (filename, newname, ok_if_already_exists) | |
1956 | Lisp_Object filename, newname, ok_if_already_exists; | |
1957 | { | |
1958 | #ifdef NO_ARG_ARRAY | |
1959 | Lisp_Object args[2]; | |
1960 | #endif | |
32f4334d | 1961 | Lisp_Object handler; |
570d7624 JB |
1962 | struct gcpro gcpro1, gcpro2; |
1963 | ||
1964 | GCPRO2 (filename, newname); | |
1965 | CHECK_STRING (filename, 0); | |
1966 | CHECK_STRING (newname, 1); | |
1967 | filename = Fexpand_file_name (filename, Qnil); | |
1968 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
1969 | |
1970 | /* If the file name has special constructs in it, | |
1971 | call the corresponding file handler. */ | |
642ef245 | 1972 | handler = Ffind_file_name_handler (filename); |
32f4334d | 1973 | if (!NILP (handler)) |
36712b0a KH |
1974 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, |
1975 | newname, ok_if_already_exists)); | |
32f4334d | 1976 | |
265a9e55 | 1977 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1978 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1979 | barf_or_query_if_file_exists (newname, "make it a new name", | |
1980 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1981 | unlink (XSTRING (newname)->data); | |
1982 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)) | |
1983 | { | |
1984 | #ifdef NO_ARG_ARRAY | |
1985 | args[0] = filename; | |
1986 | args[1] = newname; | |
1987 | report_file_error ("Adding new name", Flist (2, args)); | |
1988 | #else | |
1989 | report_file_error ("Adding new name", Flist (2, &filename)); | |
1990 | #endif | |
1991 | } | |
1992 | ||
1993 | UNGCPRO; | |
1994 | return Qnil; | |
1995 | } | |
1996 | ||
1997 | #ifdef S_IFLNK | |
1998 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, | |
1999 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", | |
2000 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ | |
2001 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
2002 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
2003 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
2004 | This happens for interactive use with M-x.") | |
e5d77022 JB |
2005 | (filename, linkname, ok_if_already_exists) |
2006 | Lisp_Object filename, linkname, ok_if_already_exists; | |
570d7624 JB |
2007 | { |
2008 | #ifdef NO_ARG_ARRAY | |
2009 | Lisp_Object args[2]; | |
2010 | #endif | |
32f4334d | 2011 | Lisp_Object handler; |
570d7624 JB |
2012 | struct gcpro gcpro1, gcpro2; |
2013 | ||
e5d77022 | 2014 | GCPRO2 (filename, linkname); |
570d7624 | 2015 | CHECK_STRING (filename, 0); |
e5d77022 | 2016 | CHECK_STRING (linkname, 1); |
d9bc1c99 RS |
2017 | /* If the link target has a ~, we must expand it to get |
2018 | a truly valid file name. Otherwise, do not expand; | |
2019 | we want to permit links to relative file names. */ | |
2020 | if (XSTRING (filename)->data[0] == '~') | |
2021 | filename = Fexpand_file_name (filename, Qnil); | |
e5d77022 | 2022 | linkname = Fexpand_file_name (linkname, Qnil); |
32f4334d RS |
2023 | |
2024 | /* If the file name has special constructs in it, | |
2025 | call the corresponding file handler. */ | |
642ef245 | 2026 | handler = Ffind_file_name_handler (filename); |
32f4334d | 2027 | if (!NILP (handler)) |
36712b0a KH |
2028 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
2029 | linkname, ok_if_already_exists)); | |
32f4334d | 2030 | |
265a9e55 | 2031 | if (NILP (ok_if_already_exists) |
570d7624 | 2032 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
e5d77022 | 2033 | barf_or_query_if_file_exists (linkname, "make it a link", |
570d7624 | 2034 | XTYPE (ok_if_already_exists) == Lisp_Int); |
e5d77022 | 2035 | if (0 > symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
570d7624 JB |
2036 | { |
2037 | /* If we didn't complain already, silently delete existing file. */ | |
2038 | if (errno == EEXIST) | |
2039 | { | |
9083124b | 2040 | unlink (XSTRING (linkname)->data); |
e5d77022 | 2041 | if (0 <= symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
570d7624 JB |
2042 | return Qnil; |
2043 | } | |
2044 | ||
2045 | #ifdef NO_ARG_ARRAY | |
2046 | args[0] = filename; | |
e5d77022 | 2047 | args[1] = linkname; |
570d7624 JB |
2048 | report_file_error ("Making symbolic link", Flist (2, args)); |
2049 | #else | |
2050 | report_file_error ("Making symbolic link", Flist (2, &filename)); | |
2051 | #endif | |
2052 | } | |
2053 | UNGCPRO; | |
2054 | return Qnil; | |
2055 | } | |
2056 | #endif /* S_IFLNK */ | |
2057 | ||
2058 | #ifdef VMS | |
2059 | ||
2060 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, | |
2061 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", | |
2062 | "Define the job-wide logical name NAME to have the value STRING.\n\ | |
2063 | If STRING is nil or a null string, the logical name NAME is deleted.") | |
2064 | (varname, string) | |
2065 | Lisp_Object varname; | |
2066 | Lisp_Object string; | |
2067 | { | |
2068 | CHECK_STRING (varname, 0); | |
265a9e55 | 2069 | if (NILP (string)) |
570d7624 JB |
2070 | delete_logical_name (XSTRING (varname)->data); |
2071 | else | |
2072 | { | |
2073 | CHECK_STRING (string, 1); | |
2074 | ||
2075 | if (XSTRING (string)->size == 0) | |
2076 | delete_logical_name (XSTRING (varname)->data); | |
2077 | else | |
2078 | define_logical_name (XSTRING (varname)->data, XSTRING (string)->data); | |
2079 | } | |
2080 | ||
2081 | return string; | |
2082 | } | |
2083 | #endif /* VMS */ | |
2084 | ||
2085 | #ifdef HPUX_NET | |
2086 | ||
2087 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, | |
2088 | "Open a network connection to PATH using LOGIN as the login string.") | |
2089 | (path, login) | |
2090 | Lisp_Object path, login; | |
2091 | { | |
2092 | int netresult; | |
2093 | ||
2094 | CHECK_STRING (path, 0); | |
2095 | CHECK_STRING (login, 0); | |
2096 | ||
2097 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); | |
2098 | ||
2099 | if (netresult == -1) | |
2100 | return Qnil; | |
2101 | else | |
2102 | return Qt; | |
2103 | } | |
2104 | #endif /* HPUX_NET */ | |
2105 | \f | |
2106 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, | |
2107 | 1, 1, 0, | |
2108 | "Return t if file FILENAME specifies an absolute path name.\n\ | |
2109 | On Unix, this is a name starting with a `/' or a `~'.") | |
2110 | (filename) | |
2111 | Lisp_Object filename; | |
2112 | { | |
2113 | unsigned char *ptr; | |
2114 | ||
2115 | CHECK_STRING (filename, 0); | |
2116 | ptr = XSTRING (filename)->data; | |
2117 | if (*ptr == '/' || *ptr == '~' | |
2118 | #ifdef VMS | |
2119 | /* ??? This criterion is probably wrong for '<'. */ | |
2120 | || index (ptr, ':') || index (ptr, '<') | |
2121 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) | |
2122 | && ptr[1] != '.') | |
2123 | #endif /* VMS */ | |
4c3c22f3 RS |
2124 | #ifdef MSDOS |
2125 | || (*ptr != 0 && ptr[1] == ':' && ptr[2] == '/') | |
2126 | #endif | |
570d7624 JB |
2127 | ) |
2128 | return Qt; | |
2129 | else | |
2130 | return Qnil; | |
2131 | } | |
2132 | ||
2133 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, | |
2134 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ | |
2135 | See also `file-readable-p' and `file-attributes'.") | |
2136 | (filename) | |
2137 | Lisp_Object filename; | |
2138 | { | |
2139 | Lisp_Object abspath; | |
32f4334d | 2140 | Lisp_Object handler; |
570d7624 JB |
2141 | |
2142 | CHECK_STRING (filename, 0); | |
2143 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2144 | |
2145 | /* If the file name has special constructs in it, | |
2146 | call the corresponding file handler. */ | |
642ef245 | 2147 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2148 | if (!NILP (handler)) |
09121adc | 2149 | return call2 (handler, Qfile_exists_p, abspath); |
32f4334d | 2150 | |
570d7624 JB |
2151 | return (access (XSTRING (abspath)->data, 0) >= 0) ? Qt : Qnil; |
2152 | } | |
2153 | ||
2154 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
2155 | "Return t if FILENAME can be executed by you.\n\ | |
8b235fde | 2156 | For a directory, this means you can access files in that directory.") |
570d7624 JB |
2157 | (filename) |
2158 | Lisp_Object filename; | |
2159 | ||
2160 | { | |
2161 | Lisp_Object abspath; | |
32f4334d | 2162 | Lisp_Object handler; |
570d7624 JB |
2163 | |
2164 | CHECK_STRING (filename, 0); | |
2165 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2166 | |
2167 | /* If the file name has special constructs in it, | |
2168 | call the corresponding file handler. */ | |
642ef245 | 2169 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2170 | if (!NILP (handler)) |
09121adc | 2171 | return call2 (handler, Qfile_executable_p, abspath); |
32f4334d | 2172 | |
570d7624 JB |
2173 | return (access (XSTRING (abspath)->data, 1) >= 0) ? Qt : Qnil; |
2174 | } | |
2175 | ||
2176 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, | |
2177 | "Return t if file FILENAME exists and you can read it.\n\ | |
2178 | See also `file-exists-p' and `file-attributes'.") | |
2179 | (filename) | |
2180 | Lisp_Object filename; | |
2181 | { | |
2182 | Lisp_Object abspath; | |
32f4334d | 2183 | Lisp_Object handler; |
570d7624 JB |
2184 | |
2185 | CHECK_STRING (filename, 0); | |
2186 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2187 | |
2188 | /* If the file name has special constructs in it, | |
2189 | call the corresponding file handler. */ | |
642ef245 | 2190 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2191 | if (!NILP (handler)) |
09121adc | 2192 | return call2 (handler, Qfile_readable_p, abspath); |
32f4334d | 2193 | |
570d7624 JB |
2194 | return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil; |
2195 | } | |
2196 | ||
2197 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, | |
89de89c7 RS |
2198 | "Return non-nil if file FILENAME is the name of a symbolic link.\n\ |
2199 | The value is the name of the file to which it is linked.\n\ | |
2200 | Otherwise returns nil.") | |
570d7624 JB |
2201 | (filename) |
2202 | Lisp_Object filename; | |
2203 | { | |
2204 | #ifdef S_IFLNK | |
2205 | char *buf; | |
2206 | int bufsize; | |
2207 | int valsize; | |
2208 | Lisp_Object val; | |
32f4334d | 2209 | Lisp_Object handler; |
570d7624 JB |
2210 | |
2211 | CHECK_STRING (filename, 0); | |
2212 | filename = Fexpand_file_name (filename, Qnil); | |
2213 | ||
32f4334d RS |
2214 | /* If the file name has special constructs in it, |
2215 | call the corresponding file handler. */ | |
642ef245 | 2216 | handler = Ffind_file_name_handler (filename); |
32f4334d RS |
2217 | if (!NILP (handler)) |
2218 | return call2 (handler, Qfile_symlink_p, filename); | |
2219 | ||
570d7624 JB |
2220 | bufsize = 100; |
2221 | while (1) | |
2222 | { | |
2223 | buf = (char *) xmalloc (bufsize); | |
2224 | bzero (buf, bufsize); | |
2225 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); | |
2226 | if (valsize < bufsize) break; | |
2227 | /* Buffer was not long enough */ | |
9ac0d9e0 | 2228 | xfree (buf); |
570d7624 JB |
2229 | bufsize *= 2; |
2230 | } | |
2231 | if (valsize == -1) | |
2232 | { | |
9ac0d9e0 | 2233 | xfree (buf); |
570d7624 JB |
2234 | return Qnil; |
2235 | } | |
2236 | val = make_string (buf, valsize); | |
9ac0d9e0 | 2237 | xfree (buf); |
570d7624 JB |
2238 | return val; |
2239 | #else /* not S_IFLNK */ | |
2240 | return Qnil; | |
2241 | #endif /* not S_IFLNK */ | |
2242 | } | |
2243 | ||
a253bab2 JB |
2244 | #ifdef SOLARIS_BROKEN_ACCESS |
2245 | /* In Solaris 2.1, the readonly-ness of the filesystem is not | |
2246 | considered by the access system call. This is Sun's bug, but we | |
2247 | still have to make Emacs work. */ | |
2248 | ||
2249 | #include <sys/statvfs.h> | |
2250 | ||
2251 | static int | |
2252 | ro_fsys (path) | |
2253 | char *path; | |
2254 | { | |
2255 | struct statvfs statvfsb; | |
2256 | ||
2257 | if (statvfs(path, &statvfsb)) | |
2258 | return 1; /* error from statvfs, be conservative and say not wrtable */ | |
2259 | else | |
2260 | /* Otherwise, fsys is ro if bit is set. */ | |
2261 | return statvfsb.f_flag & ST_RDONLY; | |
2262 | } | |
2263 | #else | |
2264 | /* But on every other os, access has already done the right thing. */ | |
2265 | #define ro_fsys(path) 0 | |
2266 | #endif | |
2267 | ||
570d7624 JB |
2268 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
2269 | on the RT/PC. */ | |
2270 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
2271 | "Return t if file FILENAME can be written or created by you.") | |
2272 | (filename) | |
2273 | Lisp_Object filename; | |
2274 | { | |
2275 | Lisp_Object abspath, dir; | |
32f4334d | 2276 | Lisp_Object handler; |
570d7624 JB |
2277 | |
2278 | CHECK_STRING (filename, 0); | |
2279 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
2280 | |
2281 | /* If the file name has special constructs in it, | |
2282 | call the corresponding file handler. */ | |
642ef245 | 2283 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2284 | if (!NILP (handler)) |
09121adc | 2285 | return call2 (handler, Qfile_writable_p, abspath); |
32f4334d | 2286 | |
570d7624 | 2287 | if (access (XSTRING (abspath)->data, 0) >= 0) |
a253bab2 | 2288 | return ((access (XSTRING (abspath)->data, 2) >= 0 |
e7c7295c | 2289 | && ! ro_fsys ((char *) XSTRING (abspath)->data)) |
a253bab2 | 2290 | ? Qt : Qnil); |
570d7624 JB |
2291 | dir = Ffile_name_directory (abspath); |
2292 | #ifdef VMS | |
265a9e55 | 2293 | if (!NILP (dir)) |
570d7624 JB |
2294 | dir = Fdirectory_file_name (dir); |
2295 | #endif /* VMS */ | |
4c3c22f3 RS |
2296 | #ifdef MSDOS |
2297 | if (!NILP (dir)) | |
2298 | dir = Fdirectory_file_name (dir); | |
2299 | #endif /* MSDOS */ | |
a253bab2 | 2300 | return ((access (!NILP (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0 |
e7c7295c | 2301 | && ! ro_fsys ((char *) XSTRING (dir)->data)) |
570d7624 JB |
2302 | ? Qt : Qnil); |
2303 | } | |
2304 | ||
2305 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, | |
2306 | "Return t if file FILENAME is the name of a directory as a file.\n\ | |
2307 | A directory name spec may be given instead; then the value is t\n\ | |
2308 | if the directory so specified exists and really is a directory.") | |
2309 | (filename) | |
2310 | Lisp_Object filename; | |
2311 | { | |
2312 | register Lisp_Object abspath; | |
2313 | struct stat st; | |
32f4334d | 2314 | Lisp_Object handler; |
570d7624 JB |
2315 | |
2316 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
2317 | ||
32f4334d RS |
2318 | /* If the file name has special constructs in it, |
2319 | call the corresponding file handler. */ | |
642ef245 | 2320 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2321 | if (!NILP (handler)) |
09121adc | 2322 | return call2 (handler, Qfile_directory_p, abspath); |
32f4334d | 2323 | |
570d7624 JB |
2324 | if (stat (XSTRING (abspath)->data, &st) < 0) |
2325 | return Qnil; | |
2326 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
2327 | } | |
2328 | ||
b72dea2a JB |
2329 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
2330 | "Return t if file FILENAME is the name of a directory as a file,\n\ | |
2331 | and files in that directory can be opened by you. In order to use a\n\ | |
2332 | directory as a buffer's current directory, this predicate must return true.\n\ | |
2333 | A directory name spec may be given instead; then the value is t\n\ | |
2334 | if the directory so specified exists and really is a readable and\n\ | |
2335 | searchable directory.") | |
2336 | (filename) | |
2337 | Lisp_Object filename; | |
2338 | { | |
32f4334d RS |
2339 | Lisp_Object handler; |
2340 | ||
2341 | /* If the file name has special constructs in it, | |
2342 | call the corresponding file handler. */ | |
642ef245 | 2343 | handler = Ffind_file_name_handler (filename); |
32f4334d RS |
2344 | if (!NILP (handler)) |
2345 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2346 | ||
b72dea2a JB |
2347 | if (NILP (Ffile_directory_p (filename)) |
2348 | || NILP (Ffile_executable_p (filename))) | |
2349 | return Qnil; | |
2350 | else | |
2351 | return Qt; | |
2352 | } | |
2353 | ||
570d7624 JB |
2354 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
2355 | "Return mode bits of FILE, as an integer.") | |
2356 | (filename) | |
2357 | Lisp_Object filename; | |
2358 | { | |
2359 | Lisp_Object abspath; | |
2360 | struct stat st; | |
32f4334d | 2361 | Lisp_Object handler; |
570d7624 JB |
2362 | |
2363 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
2364 | ||
32f4334d RS |
2365 | /* If the file name has special constructs in it, |
2366 | call the corresponding file handler. */ | |
642ef245 | 2367 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2368 | if (!NILP (handler)) |
09121adc | 2369 | return call2 (handler, Qfile_modes, abspath); |
32f4334d | 2370 | |
570d7624 JB |
2371 | if (stat (XSTRING (abspath)->data, &st) < 0) |
2372 | return Qnil; | |
3ace87e3 KH |
2373 | #ifdef MSDOS |
2374 | { | |
2375 | int len; | |
2376 | char *suffix; | |
2377 | if (S_ISREG (st.st_mode) | |
2378 | && (len = XSTRING (abspath)->size) >= 5 | |
2379 | && (stricmp ((suffix = XSTRING (abspath)->data + len-4), ".com") == 0 | |
2380 | || stricmp (suffix, ".exe") == 0 | |
2381 | || stricmp (suffix, ".bat") == 0)) | |
2382 | st.st_mode |= S_IEXEC; | |
2383 | } | |
2384 | #endif /* MSDOS */ | |
2385 | ||
570d7624 JB |
2386 | return make_number (st.st_mode & 07777); |
2387 | } | |
2388 | ||
2389 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, | |
2390 | "Set mode bits of FILE to MODE (an integer).\n\ | |
2391 | Only the 12 low bits of MODE are used.") | |
2392 | (filename, mode) | |
2393 | Lisp_Object filename, mode; | |
2394 | { | |
2395 | Lisp_Object abspath; | |
32f4334d | 2396 | Lisp_Object handler; |
570d7624 JB |
2397 | |
2398 | abspath = Fexpand_file_name (filename, current_buffer->directory); | |
2399 | CHECK_NUMBER (mode, 1); | |
2400 | ||
32f4334d RS |
2401 | /* If the file name has special constructs in it, |
2402 | call the corresponding file handler. */ | |
642ef245 | 2403 | handler = Ffind_file_name_handler (abspath); |
32f4334d | 2404 | if (!NILP (handler)) |
09121adc | 2405 | return call3 (handler, Qset_file_modes, abspath, mode); |
32f4334d | 2406 | |
570d7624 JB |
2407 | #ifndef APOLLO |
2408 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) | |
2409 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2410 | #else /* APOLLO */ | |
2411 | if (!egetenv ("USE_DOMAIN_ACLS")) | |
2412 | { | |
2413 | struct stat st; | |
2414 | struct timeval tvp[2]; | |
2415 | ||
2416 | /* chmod on apollo also change the file's modtime; need to save the | |
2417 | modtime and then restore it. */ | |
2418 | if (stat (XSTRING (abspath)->data, &st) < 0) | |
2419 | { | |
2420 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2421 | return (Qnil); | |
2422 | } | |
2423 | ||
2424 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) | |
2425 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2426 | ||
2427 | /* reset the old accessed and modified times. */ | |
2428 | tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */ | |
2429 | tvp[0].tv_usec = 0; | |
2430 | tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */ | |
2431 | tvp[1].tv_usec = 0; | |
2432 | ||
2433 | if (utimes (XSTRING (abspath)->data, tvp) < 0) | |
2434 | report_file_error ("Doing utimes", Fcons (abspath, Qnil)); | |
2435 | } | |
2436 | #endif /* APOLLO */ | |
2437 | ||
2438 | return Qnil; | |
2439 | } | |
2440 | ||
c24e9a53 | 2441 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
5f85ea58 RS |
2442 | "Set the file permission bits for newly created files.\n\ |
2443 | The argument MODE should be an integer; only the low 9 bits are used.\n\ | |
36a8c287 | 2444 | This setting is inherited by subprocesses.") |
5f85ea58 RS |
2445 | (mode) |
2446 | Lisp_Object mode; | |
36a8c287 | 2447 | { |
5f85ea58 | 2448 | CHECK_NUMBER (mode, 0); |
36a8c287 | 2449 | |
5f85ea58 | 2450 | umask ((~ XINT (mode)) & 0777); |
36a8c287 JB |
2451 | |
2452 | return Qnil; | |
2453 | } | |
2454 | ||
c24e9a53 | 2455 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
5f85ea58 RS |
2456 | "Return the default file protection for created files.\n\ |
2457 | The value is an integer.") | |
36a8c287 JB |
2458 | () |
2459 | { | |
5f85ea58 RS |
2460 | int realmask; |
2461 | Lisp_Object value; | |
36a8c287 | 2462 | |
5f85ea58 RS |
2463 | realmask = umask (0); |
2464 | umask (realmask); | |
36a8c287 | 2465 | |
5f85ea58 RS |
2466 | XSET (value, Lisp_Int, (~ realmask) & 0777); |
2467 | return value; | |
36a8c287 JB |
2468 | } |
2469 | ||
85ffea93 RS |
2470 | #ifdef unix |
2471 | ||
2472 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", | |
2473 | "Tell Unix to finish all pending disk updates.") | |
2474 | () | |
2475 | { | |
2476 | sync (); | |
2477 | return Qnil; | |
2478 | } | |
2479 | ||
2480 | #endif /* unix */ | |
2481 | ||
570d7624 JB |
2482 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
2483 | "Return t if file FILE1 is newer than file FILE2.\n\ | |
2484 | If FILE1 does not exist, the answer is nil;\n\ | |
2485 | otherwise, if FILE2 does not exist, the answer is t.") | |
2486 | (file1, file2) | |
2487 | Lisp_Object file1, file2; | |
2488 | { | |
32f4334d | 2489 | Lisp_Object abspath1, abspath2; |
570d7624 JB |
2490 | struct stat st; |
2491 | int mtime1; | |
32f4334d | 2492 | Lisp_Object handler; |
09121adc | 2493 | struct gcpro gcpro1, gcpro2; |
570d7624 JB |
2494 | |
2495 | CHECK_STRING (file1, 0); | |
2496 | CHECK_STRING (file2, 0); | |
2497 | ||
09121adc RS |
2498 | abspath1 = Qnil; |
2499 | GCPRO2 (abspath1, file2); | |
32f4334d RS |
2500 | abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); |
2501 | abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
09121adc | 2502 | UNGCPRO; |
570d7624 | 2503 | |
32f4334d RS |
2504 | /* If the file name has special constructs in it, |
2505 | call the corresponding file handler. */ | |
642ef245 | 2506 | handler = Ffind_file_name_handler (abspath1); |
51cf6d37 RS |
2507 | if (NILP (handler)) |
2508 | handler = Ffind_file_name_handler (abspath2); | |
32f4334d RS |
2509 | if (!NILP (handler)) |
2510 | return call3 (handler, Qfile_newer_than_file_p, abspath1, abspath2); | |
2511 | ||
2512 | if (stat (XSTRING (abspath1)->data, &st) < 0) | |
570d7624 JB |
2513 | return Qnil; |
2514 | ||
2515 | mtime1 = st.st_mtime; | |
2516 | ||
32f4334d | 2517 | if (stat (XSTRING (abspath2)->data, &st) < 0) |
570d7624 JB |
2518 | return Qt; |
2519 | ||
2520 | return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
2521 | } | |
2522 | \f | |
4c3c22f3 RS |
2523 | #ifdef MSDOS |
2524 | Lisp_Object Qfind_buffer_file_type; | |
2525 | #endif | |
2526 | ||
570d7624 | 2527 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
3d0387c0 | 2528 | 1, 5, 0, |
570d7624 | 2529 | "Insert contents of file FILENAME after point.\n\ |
7fded690 | 2530 | Returns list of absolute file name and length of data inserted.\n\ |
570d7624 JB |
2531 | If second argument VISIT is non-nil, the buffer's visited filename\n\ |
2532 | and last save file modtime are set, and it is marked unmodified.\n\ | |
2533 | If visiting and the file does not exist, visiting is completed\n\ | |
7fded690 JB |
2534 | before the error is signaled.\n\n\ |
2535 | The optional third and fourth arguments BEG and END\n\ | |
2536 | specify what portion of the file to insert.\n\ | |
3d0387c0 RS |
2537 | If VISIT is non-nil, BEG and END must be nil.\n\ |
2538 | If optional fifth argument REPLACE is non-nil,\n\ | |
2539 | it means replace the current buffer contents (in the accessible portion)\n\ | |
2540 | with the file contents. This is better than simply deleting and inserting\n\ | |
2541 | the whole thing because (1) it preserves some marker positions\n\ | |
2542 | and (2) it puts less data in the undo list.") | |
2543 | (filename, visit, beg, end, replace) | |
2544 | Lisp_Object filename, visit, beg, end, replace; | |
570d7624 JB |
2545 | { |
2546 | struct stat st; | |
2547 | register int fd; | |
2548 | register int inserted = 0; | |
2549 | register int how_much; | |
2550 | int count = specpdl_ptr - specpdl; | |
d6a3cc15 RS |
2551 | struct gcpro gcpro1, gcpro2; |
2552 | Lisp_Object handler, val, insval; | |
2553 | Lisp_Object p; | |
7fded690 | 2554 | int total; |
32f4334d RS |
2555 | |
2556 | val = Qnil; | |
d6a3cc15 | 2557 | p = Qnil; |
32f4334d | 2558 | |
d6a3cc15 | 2559 | GCPRO2 (filename, p); |
265a9e55 | 2560 | if (!NILP (current_buffer->read_only)) |
570d7624 JB |
2561 | Fbarf_if_buffer_read_only(); |
2562 | ||
2563 | CHECK_STRING (filename, 0); | |
2564 | filename = Fexpand_file_name (filename, Qnil); | |
2565 | ||
32f4334d RS |
2566 | /* If the file name has special constructs in it, |
2567 | call the corresponding file handler. */ | |
642ef245 | 2568 | handler = Ffind_file_name_handler (filename); |
32f4334d RS |
2569 | if (!NILP (handler)) |
2570 | { | |
3d0387c0 RS |
2571 | val = call6 (handler, Qinsert_file_contents, filename, |
2572 | visit, beg, end, replace); | |
32f4334d RS |
2573 | goto handled; |
2574 | } | |
2575 | ||
570d7624 JB |
2576 | fd = -1; |
2577 | ||
2578 | #ifndef APOLLO | |
2579 | if (stat (XSTRING (filename)->data, &st) < 0 | |
349a7710 | 2580 | || (fd = open (XSTRING (filename)->data, 0)) < 0) |
570d7624 JB |
2581 | #else |
2582 | if ((fd = open (XSTRING (filename)->data, 0)) < 0 | |
2583 | || fstat (fd, &st) < 0) | |
2584 | #endif /* not APOLLO */ | |
2585 | { | |
2586 | if (fd >= 0) close (fd); | |
265a9e55 | 2587 | if (NILP (visit)) |
570d7624 JB |
2588 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
2589 | st.st_mtime = -1; | |
2590 | how_much = 0; | |
2591 | goto notfound; | |
2592 | } | |
2593 | ||
a1d2b64a RS |
2594 | /* Replacement should preserve point as it preserves markers. */ |
2595 | if (!NILP (replace)) | |
2596 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); | |
2597 | ||
570d7624 JB |
2598 | record_unwind_protect (close_file_unwind, make_number (fd)); |
2599 | ||
be53b411 JB |
2600 | #ifdef S_IFSOCK |
2601 | /* This code will need to be changed in order to work on named | |
2602 | pipes, and it's probably just not worth it. So we should at | |
2603 | least signal an error. */ | |
2604 | if ((st.st_mode & S_IFMT) == S_IFSOCK) | |
2605 | Fsignal (Qfile_error, | |
2606 | Fcons (build_string ("reading from named pipe"), | |
2607 | Fcons (filename, Qnil))); | |
2608 | #endif | |
2609 | ||
570d7624 JB |
2610 | /* Supposedly happens on VMS. */ |
2611 | if (st.st_size < 0) | |
2612 | error ("File size is negative"); | |
be53b411 | 2613 | |
7fded690 JB |
2614 | if (!NILP (beg) || !NILP (end)) |
2615 | if (!NILP (visit)) | |
2616 | error ("Attempt to visit less than an entire file"); | |
2617 | ||
2618 | if (!NILP (beg)) | |
2619 | CHECK_NUMBER (beg, 0); | |
2620 | else | |
2621 | XFASTINT (beg) = 0; | |
2622 | ||
2623 | if (!NILP (end)) | |
2624 | CHECK_NUMBER (end, 0); | |
2625 | else | |
2626 | { | |
2627 | XSETINT (end, st.st_size); | |
2628 | if (XINT (end) != st.st_size) | |
2629 | error ("maximum buffer size exceeded"); | |
2630 | } | |
2631 | ||
3d0387c0 RS |
2632 | /* If requested, replace the accessible part of the buffer |
2633 | with the file contents. Avoid replacing text at the | |
2634 | beginning or end of the buffer that matches the file contents; | |
2635 | that preserves markers pointing to the unchanged parts. */ | |
2636 | if (!NILP (replace)) | |
2637 | { | |
2638 | char buffer[1 << 14]; | |
2639 | int same_at_start = BEGV; | |
2640 | int same_at_end = ZV; | |
9c28748f RS |
2641 | int overlap; |
2642 | ||
3d0387c0 RS |
2643 | immediate_quit = 1; |
2644 | QUIT; | |
2645 | /* Count how many chars at the start of the file | |
2646 | match the text at the beginning of the buffer. */ | |
2647 | while (1) | |
2648 | { | |
2649 | int nread, bufpos; | |
2650 | ||
2651 | nread = read (fd, buffer, sizeof buffer); | |
2652 | if (nread < 0) | |
2653 | error ("IO error reading %s: %s", | |
2654 | XSTRING (filename)->data, strerror (errno)); | |
2655 | else if (nread == 0) | |
2656 | break; | |
2657 | bufpos = 0; | |
2658 | while (bufpos < nread && same_at_start < ZV | |
2659 | && FETCH_CHAR (same_at_start) == buffer[bufpos]) | |
2660 | same_at_start++, bufpos++; | |
2661 | /* If we found a discrepancy, stop the scan. | |
2662 | Otherwise loop around and scan the next bufferfull. */ | |
2663 | if (bufpos != nread) | |
2664 | break; | |
2665 | } | |
2666 | immediate_quit = 0; | |
2667 | /* If the file matches the buffer completely, | |
2668 | there's no need to replace anything. */ | |
2669 | if (same_at_start == ZV) | |
2670 | { | |
2671 | close (fd); | |
a1d2b64a | 2672 | specpdl_ptr--; |
3d0387c0 RS |
2673 | goto handled; |
2674 | } | |
2675 | immediate_quit = 1; | |
2676 | QUIT; | |
2677 | /* Count how many chars at the end of the file | |
2678 | match the text at the end of the buffer. */ | |
2679 | while (1) | |
2680 | { | |
2681 | int total_read, nread, bufpos, curpos, trial; | |
2682 | ||
2683 | /* At what file position are we now scanning? */ | |
2684 | curpos = st.st_size - (ZV - same_at_end); | |
2685 | /* How much can we scan in the next step? */ | |
2686 | trial = min (curpos, sizeof buffer); | |
2687 | if (lseek (fd, curpos - trial, 0) < 0) | |
2688 | report_file_error ("Setting file position", | |
2689 | Fcons (filename, Qnil)); | |
2690 | ||
2691 | total_read = 0; | |
2692 | while (total_read < trial) | |
2693 | { | |
2694 | nread = read (fd, buffer + total_read, trial - total_read); | |
2695 | if (nread <= 0) | |
2696 | error ("IO error reading %s: %s", | |
2697 | XSTRING (filename)->data, strerror (errno)); | |
2698 | total_read += nread; | |
2699 | } | |
2700 | /* Scan this bufferfull from the end, comparing with | |
2701 | the Emacs buffer. */ | |
2702 | bufpos = total_read; | |
2703 | /* Compare with same_at_start to avoid counting some buffer text | |
2704 | as matching both at the file's beginning and at the end. */ | |
2705 | while (bufpos > 0 && same_at_end > same_at_start | |
2706 | && FETCH_CHAR (same_at_end - 1) == buffer[bufpos - 1]) | |
2707 | same_at_end--, bufpos--; | |
2708 | /* If we found a discrepancy, stop the scan. | |
2709 | Otherwise loop around and scan the preceding bufferfull. */ | |
2710 | if (bufpos != 0) | |
2711 | break; | |
2712 | } | |
2713 | immediate_quit = 0; | |
9c28748f RS |
2714 | |
2715 | /* Don't try to reuse the same piece of text twice. */ | |
2716 | overlap = same_at_start - BEGV - (same_at_end + st.st_size - ZV); | |
2717 | if (overlap > 0) | |
2718 | same_at_end += overlap; | |
2719 | ||
3d0387c0 RS |
2720 | /* Arrange to read only the nonmatching middle part of the file. */ |
2721 | XFASTINT (beg) = same_at_start - BEGV; | |
2722 | XFASTINT (end) = st.st_size - (ZV - same_at_end); | |
9c28748f | 2723 | |
251f623e | 2724 | del_range_1 (same_at_start, same_at_end, 0); |
a1d2b64a RS |
2725 | /* Insert from the file at the proper position. */ |
2726 | SET_PT (same_at_start); | |
3d0387c0 RS |
2727 | } |
2728 | ||
7fded690 JB |
2729 | total = XINT (end) - XINT (beg); |
2730 | ||
570d7624 JB |
2731 | { |
2732 | register Lisp_Object temp; | |
2733 | ||
2734 | /* Make sure point-max won't overflow after this insertion. */ | |
7fded690 JB |
2735 | XSET (temp, Lisp_Int, total); |
2736 | if (total != XINT (temp)) | |
570d7624 JB |
2737 | error ("maximum buffer size exceeded"); |
2738 | } | |
2739 | ||
57d8d468 | 2740 | if (NILP (visit) && total > 0) |
570d7624 JB |
2741 | prepare_to_modify_buffer (point, point); |
2742 | ||
2743 | move_gap (point); | |
7fded690 JB |
2744 | if (GAP_SIZE < total) |
2745 | make_gap (total - GAP_SIZE); | |
2746 | ||
a1d2b64a | 2747 | if (XINT (beg) != 0 || !NILP (replace)) |
7fded690 JB |
2748 | { |
2749 | if (lseek (fd, XINT (beg), 0) < 0) | |
2750 | report_file_error ("Setting file position", Fcons (filename, Qnil)); | |
2751 | } | |
2752 | ||
a1d2b64a RS |
2753 | how_much = 0; |
2754 | while (inserted < total) | |
570d7624 | 2755 | { |
7fded690 | 2756 | int try = min (total - inserted, 64 << 10); |
b5148e85 RS |
2757 | int this; |
2758 | ||
2759 | /* Allow quitting out of the actual I/O. */ | |
2760 | immediate_quit = 1; | |
2761 | QUIT; | |
2762 | this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try); | |
2763 | immediate_quit = 0; | |
570d7624 JB |
2764 | |
2765 | if (this <= 0) | |
2766 | { | |
2767 | how_much = this; | |
2768 | break; | |
2769 | } | |
2770 | ||
2771 | GPT += this; | |
2772 | GAP_SIZE -= this; | |
2773 | ZV += this; | |
2774 | Z += this; | |
2775 | inserted += this; | |
2776 | } | |
2777 | ||
4c3c22f3 RS |
2778 | #ifdef MSDOS |
2779 | /* Demacs 1.1.1 91/10/16 HIRANO Satoshi, MW July 1993 */ | |
2780 | /* Determine file type from name and remove LFs from CR-LFs if the file | |
2781 | is deemed to be a text file. */ | |
2782 | { | |
2783 | struct gcpro gcpro1; | |
e762e30a KH |
2784 | Lisp_Object code; |
2785 | code = Qnil; | |
4c3c22f3 RS |
2786 | GCPRO1 (filename); |
2787 | code = call1 (Qfind_buffer_file_type, filename); | |
2788 | UNGCPRO; | |
2789 | if (XTYPE (code) == Lisp_Int) | |
2790 | XFASTINT (current_buffer->buffer_file_type) = XFASTINT (code); | |
2791 | if (XFASTINT (current_buffer->buffer_file_type) == 0) | |
2792 | { | |
a1d2b64a RS |
2793 | int reduced_size |
2794 | = inserted - crlf_to_lf (inserted, &FETCH_CHAR (point - 1) + 1); | |
4c3c22f3 RS |
2795 | ZV -= reduced_size; |
2796 | Z -= reduced_size; | |
2797 | GPT -= reduced_size; | |
2798 | GAP_SIZE += reduced_size; | |
2799 | inserted -= reduced_size; | |
2800 | } | |
2801 | } | |
2802 | #endif | |
2803 | ||
570d7624 | 2804 | if (inserted > 0) |
7d8451f1 RS |
2805 | { |
2806 | record_insert (point, inserted); | |
8d4e077b JA |
2807 | |
2808 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
2809 | offset_intervals (current_buffer, point, inserted); | |
7d8451f1 RS |
2810 | MODIFF++; |
2811 | } | |
570d7624 JB |
2812 | |
2813 | close (fd); | |
2814 | ||
a1d2b64a RS |
2815 | /* Discard the unwind protect for closing the file. */ |
2816 | specpdl_ptr--; | |
570d7624 JB |
2817 | |
2818 | if (how_much < 0) | |
2819 | error ("IO error reading %s: %s", | |
ce97267f | 2820 | XSTRING (filename)->data, strerror (errno)); |
570d7624 JB |
2821 | |
2822 | notfound: | |
32f4334d | 2823 | handled: |
570d7624 | 2824 | |
265a9e55 | 2825 | if (!NILP (visit)) |
570d7624 | 2826 | { |
cfadd376 RS |
2827 | if (!EQ (current_buffer->undo_list, Qt)) |
2828 | current_buffer->undo_list = Qnil; | |
570d7624 JB |
2829 | #ifdef APOLLO |
2830 | stat (XSTRING (filename)->data, &st); | |
2831 | #endif | |
62bcf009 | 2832 | |
a7e82472 RS |
2833 | if (NILP (handler)) |
2834 | { | |
2835 | current_buffer->modtime = st.st_mtime; | |
2836 | current_buffer->filename = filename; | |
2837 | } | |
62bcf009 | 2838 | |
570d7624 JB |
2839 | current_buffer->save_modified = MODIFF; |
2840 | current_buffer->auto_save_modified = MODIFF; | |
2841 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2842 | #ifdef CLASH_DETECTION | |
32f4334d RS |
2843 | if (NILP (handler)) |
2844 | { | |
2845 | if (!NILP (current_buffer->filename)) | |
2846 | unlock_file (current_buffer->filename); | |
2847 | unlock_file (filename); | |
2848 | } | |
570d7624 | 2849 | #endif /* CLASH_DETECTION */ |
570d7624 | 2850 | /* If visiting nonexistent file, return nil. */ |
32f4334d | 2851 | if (current_buffer->modtime == -1) |
570d7624 JB |
2852 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
2853 | } | |
2854 | ||
62bcf009 | 2855 | if (inserted > 0 && NILP (visit) && total > 0) |
d2cad97d | 2856 | signal_after_change (point, 0, inserted); |
570d7624 | 2857 | |
d6a3cc15 RS |
2858 | if (inserted > 0) |
2859 | { | |
2860 | p = Vafter_insert_file_functions; | |
2861 | while (!NILP (p)) | |
2862 | { | |
2863 | insval = call1 (Fcar (p), make_number (inserted)); | |
2864 | if (!NILP (insval)) | |
2865 | { | |
2866 | CHECK_NUMBER (insval, 0); | |
2867 | inserted = XFASTINT (insval); | |
2868 | } | |
2869 | QUIT; | |
2870 | p = Fcdr (p); | |
2871 | } | |
2872 | } | |
2873 | ||
a1d2b64a RS |
2874 | if (NILP (val)) |
2875 | val = Fcons (filename, | |
2876 | Fcons (make_number (inserted), | |
2877 | Qnil)); | |
2878 | ||
2879 | RETURN_UNGCPRO (unbind_to (count, val)); | |
570d7624 | 2880 | } |
7fded690 | 2881 | \f |
d6a3cc15 RS |
2882 | static Lisp_Object build_annotations (); |
2883 | ||
570d7624 JB |
2884 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5, |
2885 | "r\nFWrite region to file: ", | |
2886 | "Write current region into specified file.\n\ | |
2887 | When called from a program, takes three arguments:\n\ | |
2888 | START, END and FILENAME. START and END are buffer positions.\n\ | |
2889 | Optional fourth argument APPEND if non-nil means\n\ | |
2890 | append to existing file contents (if any).\n\ | |
2891 | Optional fifth argument VISIT if t means\n\ | |
2892 | set the last-save-file-modtime of buffer to this file's modtime\n\ | |
2893 | and mark buffer not modified.\n\ | |
3b7792ed RS |
2894 | If VISIT is a string, it is a second file name;\n\ |
2895 | the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\ | |
2896 | VISIT is also the file name to lock and unlock for clash detection.\n\ | |
1d386d28 RS |
2897 | If VISIT is neither t nor nil nor a string,\n\ |
2898 | that means do not print the \"Wrote file\" message.\n\ | |
570d7624 JB |
2899 | Kludgy feature: if START is a string, then that string is written\n\ |
2900 | to the file, instead of any buffer contents, and END is ignored.") | |
2901 | (start, end, filename, append, visit) | |
2902 | Lisp_Object start, end, filename, append, visit; | |
2903 | { | |
2904 | register int desc; | |
2905 | int failure; | |
2906 | int save_errno; | |
2907 | unsigned char *fn; | |
2908 | struct stat st; | |
c975dd7a | 2909 | int tem; |
570d7624 JB |
2910 | int count = specpdl_ptr - specpdl; |
2911 | #ifdef VMS | |
2912 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ | |
2913 | #endif /* VMS */ | |
3eac9910 | 2914 | Lisp_Object handler; |
4ad827c5 | 2915 | Lisp_Object visit_file; |
d6a3cc15 RS |
2916 | Lisp_Object annotations; |
2917 | int visiting, quietly; | |
3b7792ed | 2918 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
4c3c22f3 RS |
2919 | #ifdef MSDOS |
2920 | int buffer_file_type | |
2921 | = NILP (current_buffer->buffer_file_type) ? O_TEXT : O_BINARY; | |
2922 | #endif | |
570d7624 | 2923 | |
561cb8e1 | 2924 | if (!NILP (start) && !STRINGP (start)) |
570d7624 JB |
2925 | validate_region (&start, &end); |
2926 | ||
2927 | filename = Fexpand_file_name (filename, Qnil); | |
561cb8e1 | 2928 | if (STRINGP (visit)) |
e5176bae | 2929 | visit_file = Fexpand_file_name (visit, Qnil); |
4ad827c5 RS |
2930 | else |
2931 | visit_file = filename; | |
2932 | ||
561cb8e1 | 2933 | visiting = (EQ (visit, Qt) || STRINGP (visit)); |
d6a3cc15 RS |
2934 | quietly = !NILP (visit); |
2935 | ||
2936 | annotations = Qnil; | |
2937 | ||
2938 | GCPRO4 (start, filename, annotations, visit_file); | |
570d7624 | 2939 | |
32f4334d RS |
2940 | /* If the file name has special constructs in it, |
2941 | call the corresponding file handler. */ | |
642ef245 | 2942 | handler = Ffind_file_name_handler (filename); |
b56ad927 RS |
2943 | /* If FILENAME has no handler, see if VISIT has one. */ |
2944 | if (NILP (handler) && XTYPE (visit) == Lisp_String) | |
2945 | handler = Ffind_file_name_handler (visit); | |
3eac9910 | 2946 | |
32f4334d RS |
2947 | if (!NILP (handler)) |
2948 | { | |
32f4334d | 2949 | Lisp_Object val; |
51cf6d37 RS |
2950 | val = call6 (handler, Qwrite_region, start, end, |
2951 | filename, append, visit); | |
32f4334d | 2952 | |
d6a3cc15 | 2953 | if (visiting) |
32f4334d | 2954 | { |
32f4334d RS |
2955 | current_buffer->save_modified = MODIFF; |
2956 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
3b7792ed | 2957 | current_buffer->filename = visit_file; |
32f4334d | 2958 | } |
09121adc | 2959 | UNGCPRO; |
32f4334d RS |
2960 | return val; |
2961 | } | |
2962 | ||
561cb8e1 RS |
2963 | /* Special kludge to simplify auto-saving. */ |
2964 | if (NILP (start)) | |
2965 | { | |
2966 | XFASTINT (start) = BEG; | |
2967 | XFASTINT (end) = Z; | |
2968 | } | |
2969 | ||
d6a3cc15 RS |
2970 | annotations = build_annotations (start, end); |
2971 | ||
570d7624 JB |
2972 | #ifdef CLASH_DETECTION |
2973 | if (!auto_saving) | |
3b7792ed | 2974 | lock_file (visit_file); |
570d7624 JB |
2975 | #endif /* CLASH_DETECTION */ |
2976 | ||
09121adc | 2977 | fn = XSTRING (filename)->data; |
570d7624 | 2978 | desc = -1; |
265a9e55 | 2979 | if (!NILP (append)) |
4c3c22f3 RS |
2980 | #ifdef MSDOS |
2981 | desc = open (fn, O_WRONLY | buffer_file_type); | |
2982 | #else | |
570d7624 | 2983 | desc = open (fn, O_WRONLY); |
4c3c22f3 | 2984 | #endif |
570d7624 JB |
2985 | |
2986 | if (desc < 0) | |
2987 | #ifdef VMS | |
2988 | if (auto_saving) /* Overwrite any previous version of autosave file */ | |
2989 | { | |
2990 | vms_truncate (fn); /* if fn exists, truncate to zero length */ | |
2991 | desc = open (fn, O_RDWR); | |
2992 | if (desc < 0) | |
561cb8e1 | 2993 | desc = creat_copy_attrs (STRINGP (current_buffer->filename) |
b72dea2a JB |
2994 | ? XSTRING (current_buffer->filename)->data : 0, |
2995 | fn); | |
570d7624 JB |
2996 | } |
2997 | else /* Write to temporary name and rename if no errors */ | |
2998 | { | |
2999 | Lisp_Object temp_name; | |
3000 | temp_name = Ffile_name_directory (filename); | |
3001 | ||
265a9e55 | 3002 | if (!NILP (temp_name)) |
570d7624 JB |
3003 | { |
3004 | temp_name = Fmake_temp_name (concat2 (temp_name, | |
3005 | build_string ("$$SAVE$$"))); | |
3006 | fname = XSTRING (filename)->data; | |
3007 | fn = XSTRING (temp_name)->data; | |
3008 | desc = creat_copy_attrs (fname, fn); | |
3009 | if (desc < 0) | |
3010 | { | |
3011 | /* If we can't open the temporary file, try creating a new | |
3012 | version of the original file. VMS "creat" creates a | |
3013 | new version rather than truncating an existing file. */ | |
3014 | fn = fname; | |
3015 | fname = 0; | |
3016 | desc = creat (fn, 0666); | |
3017 | #if 0 /* This can clobber an existing file and fail to replace it, | |
3018 | if the user runs out of space. */ | |
3019 | if (desc < 0) | |
3020 | { | |
3021 | /* We can't make a new version; | |
3022 | try to truncate and rewrite existing version if any. */ | |
3023 | vms_truncate (fn); | |
3024 | desc = open (fn, O_RDWR); | |
3025 | } | |
3026 | #endif | |
3027 | } | |
3028 | } | |
3029 | else | |
3030 | desc = creat (fn, 0666); | |
3031 | } | |
3032 | #else /* not VMS */ | |
4c3c22f3 RS |
3033 | #ifdef MSDOS |
3034 | desc = open (fn, | |
3035 | O_WRONLY | O_TRUNC | O_CREAT | buffer_file_type, | |
3036 | S_IREAD | S_IWRITE); | |
3037 | #else /* not MSDOS */ | |
570d7624 | 3038 | desc = creat (fn, auto_saving ? auto_save_mode_bits : 0666); |
4c3c22f3 | 3039 | #endif /* not MSDOS */ |
570d7624 JB |
3040 | #endif /* not VMS */ |
3041 | ||
09121adc RS |
3042 | UNGCPRO; |
3043 | ||
570d7624 JB |
3044 | if (desc < 0) |
3045 | { | |
3046 | #ifdef CLASH_DETECTION | |
3047 | save_errno = errno; | |
3b7792ed | 3048 | if (!auto_saving) unlock_file (visit_file); |
570d7624 JB |
3049 | errno = save_errno; |
3050 | #endif /* CLASH_DETECTION */ | |
3051 | report_file_error ("Opening output file", Fcons (filename, Qnil)); | |
3052 | } | |
3053 | ||
3054 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
3055 | ||
265a9e55 | 3056 | if (!NILP (append)) |
570d7624 JB |
3057 | if (lseek (desc, 0, 2) < 0) |
3058 | { | |
3059 | #ifdef CLASH_DETECTION | |
3b7792ed | 3060 | if (!auto_saving) unlock_file (visit_file); |
570d7624 JB |
3061 | #endif /* CLASH_DETECTION */ |
3062 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
3063 | } | |
3064 | ||
3065 | #ifdef VMS | |
3066 | /* | |
3067 | * Kludge Warning: The VMS C RTL likes to insert carriage returns | |
3068 | * if we do writes that don't end with a carriage return. Furthermore | |
3069 | * it cannot handle writes of more then 16K. The modified | |
3070 | * version of "sys_write" in SYSDEP.C (see comment there) copes with | |
3071 | * this EXCEPT for the last record (iff it doesn't end with a carriage | |
3072 | * return). This implies that if your buffer doesn't end with a carriage | |
3073 | * return, you get one free... tough. However it also means that if | |
3074 | * we make two calls to sys_write (a la the following code) you can | |
3075 | * get one at the gap as well. The easiest way to fix this (honest) | |
3076 | * is to move the gap to the next newline (or the end of the buffer). | |
3077 | * Thus this change. | |
3078 | * | |
3079 | * Yech! | |
3080 | */ | |
3081 | if (GPT > BEG && GPT_ADDR[-1] != '\n') | |
3082 | move_gap (find_next_newline (GPT, 1)); | |
3083 | #endif | |
3084 | ||
3085 | failure = 0; | |
3086 | immediate_quit = 1; | |
3087 | ||
561cb8e1 | 3088 | if (STRINGP (start)) |
570d7624 | 3089 | { |
d6a3cc15 RS |
3090 | failure = 0 > a_write (desc, XSTRING (start)->data, |
3091 | XSTRING (start)->size, 0, &annotations); | |
570d7624 JB |
3092 | save_errno = errno; |
3093 | } | |
3094 | else if (XINT (start) != XINT (end)) | |
3095 | { | |
c975dd7a | 3096 | int nwritten = 0; |
570d7624 JB |
3097 | if (XINT (start) < GPT) |
3098 | { | |
3099 | register int end1 = XINT (end); | |
3100 | tem = XINT (start); | |
d6a3cc15 | 3101 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), |
c975dd7a RS |
3102 | min (GPT, end1) - tem, tem, &annotations); |
3103 | nwritten += min (GPT, end1) - tem; | |
570d7624 JB |
3104 | save_errno = errno; |
3105 | } | |
3106 | ||
3107 | if (XINT (end) > GPT && !failure) | |
3108 | { | |
3109 | tem = XINT (start); | |
3110 | tem = max (tem, GPT); | |
d6a3cc15 | 3111 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), XINT (end) - tem, |
c975dd7a RS |
3112 | tem, &annotations); |
3113 | nwritten += XINT (end) - tem; | |
d6a3cc15 RS |
3114 | save_errno = errno; |
3115 | } | |
c975dd7a RS |
3116 | |
3117 | if (nwritten == 0) | |
d6a3cc15 RS |
3118 | { |
3119 | /* If file was empty, still need to write the annotations */ | |
c975dd7a | 3120 | failure = 0 > a_write (desc, "", 0, XINT (start), &annotations); |
570d7624 JB |
3121 | save_errno = errno; |
3122 | } | |
3123 | } | |
3124 | ||
3125 | immediate_quit = 0; | |
3126 | ||
6e23c83e | 3127 | #ifdef HAVE_FSYNC |
570d7624 JB |
3128 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
3129 | Disk full in NFS may be reported here. */ | |
1daffa1c RS |
3130 | /* mib says that closing the file will try to write as fast as NFS can do |
3131 | it, and that means the fsync here is not crucial for autosave files. */ | |
3132 | if (!auto_saving && fsync (desc) < 0) | |
570d7624 | 3133 | failure = 1, save_errno = errno; |
570d7624 JB |
3134 | #endif |
3135 | ||
3136 | /* Spurious "file has changed on disk" warnings have been | |
3137 | observed on Suns as well. | |
3138 | It seems that `close' can change the modtime, under nfs. | |
3139 | ||
3140 | (This has supposedly been fixed in Sunos 4, | |
3141 | but who knows about all the other machines with NFS?) */ | |
3142 | #if 0 | |
3143 | ||
3144 | /* On VMS and APOLLO, must do the stat after the close | |
3145 | since closing changes the modtime. */ | |
3146 | #ifndef VMS | |
3147 | #ifndef APOLLO | |
3148 | /* Recall that #if defined does not work on VMS. */ | |
3149 | #define FOO | |
3150 | fstat (desc, &st); | |
3151 | #endif | |
3152 | #endif | |
3153 | #endif | |
3154 | ||
3155 | /* NFS can report a write failure now. */ | |
3156 | if (close (desc) < 0) | |
3157 | failure = 1, save_errno = errno; | |
3158 | ||
3159 | #ifdef VMS | |
3160 | /* If we wrote to a temporary name and had no errors, rename to real name. */ | |
3161 | if (fname) | |
3162 | { | |
3163 | if (!failure) | |
3164 | failure = (rename (fn, fname) != 0), save_errno = errno; | |
3165 | fn = fname; | |
3166 | } | |
3167 | #endif /* VMS */ | |
3168 | ||
3169 | #ifndef FOO | |
3170 | stat (fn, &st); | |
3171 | #endif | |
3172 | /* Discard the unwind protect */ | |
3173 | specpdl_ptr = specpdl + count; | |
3174 | ||
3175 | #ifdef CLASH_DETECTION | |
3176 | if (!auto_saving) | |
3b7792ed | 3177 | unlock_file (visit_file); |
570d7624 JB |
3178 | #endif /* CLASH_DETECTION */ |
3179 | ||
3180 | /* Do this before reporting IO error | |
3181 | to avoid a "file has changed on disk" warning on | |
3182 | next attempt to save. */ | |
d6a3cc15 | 3183 | if (visiting) |
570d7624 JB |
3184 | current_buffer->modtime = st.st_mtime; |
3185 | ||
3186 | if (failure) | |
ce97267f | 3187 | error ("IO error writing %s: %s", fn, strerror (save_errno)); |
570d7624 | 3188 | |
d6a3cc15 | 3189 | if (visiting) |
570d7624 JB |
3190 | { |
3191 | current_buffer->save_modified = MODIFF; | |
3192 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
3b7792ed | 3193 | current_buffer->filename = visit_file; |
570d7624 | 3194 | } |
d6a3cc15 | 3195 | else if (quietly) |
570d7624 JB |
3196 | return Qnil; |
3197 | ||
3198 | if (!auto_saving) | |
3b7792ed | 3199 | message ("Wrote %s", XSTRING (visit_file)->data); |
570d7624 JB |
3200 | |
3201 | return Qnil; | |
3202 | } | |
3203 | ||
d6a3cc15 RS |
3204 | Lisp_Object merge (); |
3205 | ||
3206 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, | |
2ba0ccff | 3207 | "Return t if (car A) is numerically less than (car B).") |
d6a3cc15 RS |
3208 | (a, b) |
3209 | Lisp_Object a, b; | |
3210 | { | |
3211 | return Flss (Fcar (a), Fcar (b)); | |
3212 | } | |
3213 | ||
3214 | /* Build the complete list of annotations appropriate for writing out | |
3215 | the text between START and END, by calling all the functions in | |
3216 | write-region-annotate-functions and merging the lists they return. */ | |
3217 | ||
3218 | static Lisp_Object | |
3219 | build_annotations (start, end) | |
3220 | Lisp_Object start, end; | |
3221 | { | |
3222 | Lisp_Object annotations; | |
3223 | Lisp_Object p, res; | |
3224 | struct gcpro gcpro1, gcpro2; | |
3225 | ||
3226 | annotations = Qnil; | |
3227 | p = Vwrite_region_annotate_functions; | |
3228 | GCPRO2 (annotations, p); | |
3229 | while (!NILP (p)) | |
3230 | { | |
3231 | res = call2 (Fcar (p), start, end); | |
3232 | Flength (res); /* Check basic validity of return value */ | |
3233 | annotations = merge (annotations, res, Qcar_less_than_car); | |
3234 | p = Fcdr (p); | |
3235 | } | |
3236 | UNGCPRO; | |
3237 | return annotations; | |
3238 | } | |
3239 | ||
3240 | /* Write to descriptor DESC the LEN characters starting at ADDR, | |
3241 | assuming they start at position POS in the buffer. | |
3242 | Intersperse with them the annotations from *ANNOT | |
3243 | (those which fall within the range of positions POS to POS + LEN), | |
3244 | each at its appropriate position. | |
3245 | ||
3246 | Modify *ANNOT by discarding elements as we output them. | |
3247 | The return value is negative in case of system call failure. */ | |
3248 | ||
3249 | int | |
3250 | a_write (desc, addr, len, pos, annot) | |
3251 | int desc; | |
3252 | register char *addr; | |
3253 | register int len; | |
3254 | int pos; | |
3255 | Lisp_Object *annot; | |
3256 | { | |
3257 | Lisp_Object tem; | |
3258 | int nextpos; | |
3259 | int lastpos = pos + len; | |
3260 | ||
3261 | while (1) | |
3262 | { | |
3263 | tem = Fcar_safe (Fcar (*annot)); | |
3264 | if (INTEGERP (tem) && XINT (tem) >= pos && XFASTINT (tem) <= lastpos) | |
3265 | nextpos = XFASTINT (tem); | |
3266 | else | |
3267 | return e_write (desc, addr, lastpos - pos); | |
3268 | if (nextpos > pos) | |
3269 | { | |
3270 | if (0 > e_write (desc, addr, nextpos - pos)) | |
3271 | return -1; | |
3272 | addr += nextpos - pos; | |
3273 | pos = nextpos; | |
3274 | } | |
3275 | tem = Fcdr (Fcar (*annot)); | |
3276 | if (STRINGP (tem)) | |
3277 | { | |
3278 | if (0 > e_write (desc, XSTRING (tem)->data, XSTRING (tem)->size)) | |
3279 | return -1; | |
3280 | } | |
3281 | *annot = Fcdr (*annot); | |
3282 | } | |
3283 | } | |
3284 | ||
570d7624 JB |
3285 | int |
3286 | e_write (desc, addr, len) | |
3287 | int desc; | |
3288 | register char *addr; | |
3289 | register int len; | |
3290 | { | |
3291 | char buf[16 * 1024]; | |
3292 | register char *p, *end; | |
3293 | ||
3294 | if (!EQ (current_buffer->selective_display, Qt)) | |
3295 | return write (desc, addr, len) - len; | |
3296 | else | |
3297 | { | |
3298 | p = buf; | |
3299 | end = p + sizeof buf; | |
3300 | while (len--) | |
3301 | { | |
3302 | if (p == end) | |
3303 | { | |
3304 | if (write (desc, buf, sizeof buf) != sizeof buf) | |
3305 | return -1; | |
3306 | p = buf; | |
3307 | } | |
3308 | *p = *addr++; | |
3309 | if (*p++ == '\015') | |
3310 | p[-1] = '\n'; | |
3311 | } | |
3312 | if (p != buf) | |
3313 | if (write (desc, buf, p - buf) != p - buf) | |
3314 | return -1; | |
3315 | } | |
3316 | return 0; | |
3317 | } | |
3318 | ||
3319 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, | |
3320 | Sverify_visited_file_modtime, 1, 1, 0, | |
3321 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ | |
3322 | This means that the file has not been changed since it was visited or saved.") | |
3323 | (buf) | |
3324 | Lisp_Object buf; | |
3325 | { | |
3326 | struct buffer *b; | |
3327 | struct stat st; | |
32f4334d | 3328 | Lisp_Object handler; |
570d7624 JB |
3329 | |
3330 | CHECK_BUFFER (buf, 0); | |
3331 | b = XBUFFER (buf); | |
3332 | ||
3333 | if (XTYPE (b->filename) != Lisp_String) return Qt; | |
3334 | if (b->modtime == 0) return Qt; | |
3335 | ||
32f4334d RS |
3336 | /* If the file name has special constructs in it, |
3337 | call the corresponding file handler. */ | |
642ef245 | 3338 | handler = Ffind_file_name_handler (b->filename); |
32f4334d | 3339 | if (!NILP (handler)) |
09121adc | 3340 | return call2 (handler, Qverify_visited_file_modtime, buf); |
32f4334d | 3341 | |
570d7624 JB |
3342 | if (stat (XSTRING (b->filename)->data, &st) < 0) |
3343 | { | |
3344 | /* If the file doesn't exist now and didn't exist before, | |
3345 | we say that it isn't modified, provided the error is a tame one. */ | |
3346 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
3347 | st.st_mtime = -1; | |
3348 | else | |
3349 | st.st_mtime = 0; | |
3350 | } | |
3351 | if (st.st_mtime == b->modtime | |
3352 | /* If both are positive, accept them if they are off by one second. */ | |
3353 | || (st.st_mtime > 0 && b->modtime > 0 | |
3354 | && (st.st_mtime == b->modtime + 1 | |
3355 | || st.st_mtime == b->modtime - 1))) | |
3356 | return Qt; | |
3357 | return Qnil; | |
3358 | } | |
3359 | ||
3360 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
3361 | Sclear_visited_file_modtime, 0, 0, 0, | |
3362 | "Clear out records of last mod time of visited file.\n\ | |
3363 | Next attempt to save will certainly not complain of a discrepancy.") | |
3364 | () | |
3365 | { | |
3366 | current_buffer->modtime = 0; | |
3367 | return Qnil; | |
3368 | } | |
3369 | ||
f5d5eccf RS |
3370 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
3371 | Svisited_file_modtime, 0, 0, 0, | |
3372 | "Return the current buffer's recorded visited file modification time.\n\ | |
3373 | The value is a list of the form (HIGH . LOW), like the time values\n\ | |
3374 | that `file-attributes' returns.") | |
3375 | () | |
3376 | { | |
3377 | return long_to_cons (current_buffer->modtime); | |
3378 | } | |
3379 | ||
570d7624 | 3380 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
f5d5eccf | 3381 | Sset_visited_file_modtime, 0, 1, 0, |
570d7624 JB |
3382 | "Update buffer's recorded modification time from the visited file's time.\n\ |
3383 | Useful if the buffer was not read from the file normally\n\ | |
f5d5eccf RS |
3384 | or if the file itself has been changed for some known benign reason.\n\ |
3385 | An argument specifies the modification time value to use\n\ | |
3386 | \(instead of that of the visited file), in the form of a list\n\ | |
3387 | \(HIGH . LOW) or (HIGH LOW).") | |
3388 | (time_list) | |
3389 | Lisp_Object time_list; | |
570d7624 | 3390 | { |
f5d5eccf RS |
3391 | if (!NILP (time_list)) |
3392 | current_buffer->modtime = cons_to_long (time_list); | |
3393 | else | |
3394 | { | |
3395 | register Lisp_Object filename; | |
3396 | struct stat st; | |
3397 | Lisp_Object handler; | |
570d7624 | 3398 | |
f5d5eccf | 3399 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
32f4334d | 3400 | |
f5d5eccf RS |
3401 | /* If the file name has special constructs in it, |
3402 | call the corresponding file handler. */ | |
3403 | handler = Ffind_file_name_handler (filename); | |
3404 | if (!NILP (handler)) | |
caf3c431 | 3405 | /* The handler can find the file name the same way we did. */ |
76c881b0 | 3406 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
f5d5eccf RS |
3407 | else if (stat (XSTRING (filename)->data, &st) >= 0) |
3408 | current_buffer->modtime = st.st_mtime; | |
3409 | } | |
570d7624 JB |
3410 | |
3411 | return Qnil; | |
3412 | } | |
3413 | \f | |
3414 | Lisp_Object | |
3415 | auto_save_error () | |
3416 | { | |
3417 | unsigned char *name = XSTRING (current_buffer->name)->data; | |
3418 | ||
3419 | ring_bell (); | |
3420 | message ("Autosaving...error for %s", name); | |
de49a6d3 | 3421 | Fsleep_for (make_number (1), Qnil); |
570d7624 | 3422 | message ("Autosaving...error!for %s", name); |
de49a6d3 | 3423 | Fsleep_for (make_number (1), Qnil); |
570d7624 | 3424 | message ("Autosaving...error for %s", name); |
de49a6d3 | 3425 | Fsleep_for (make_number (1), Qnil); |
570d7624 JB |
3426 | return Qnil; |
3427 | } | |
3428 | ||
3429 | Lisp_Object | |
3430 | auto_save_1 () | |
3431 | { | |
3432 | unsigned char *fn; | |
3433 | struct stat st; | |
3434 | ||
3435 | /* Get visited file's mode to become the auto save file's mode. */ | |
3436 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) | |
3437 | /* But make sure we can overwrite it later! */ | |
3438 | auto_save_mode_bits = st.st_mode | 0600; | |
3439 | else | |
3440 | auto_save_mode_bits = 0666; | |
3441 | ||
3442 | return | |
3443 | Fwrite_region (Qnil, Qnil, | |
3444 | current_buffer->auto_save_file_name, | |
3445 | Qnil, Qlambda); | |
3446 | } | |
3447 | ||
3448 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", | |
3449 | "Auto-save all buffers that need it.\n\ | |
3450 | This is all buffers that have auto-saving enabled\n\ | |
3451 | and are changed since last auto-saved.\n\ | |
3452 | Auto-saving writes the buffer into a file\n\ | |
3453 | so that your editing is not lost if the system crashes.\n\ | |
012d4cdc RS |
3454 | This file is not the file you visited; that changes only when you save.\n\ |
3455 | Normally we run the normal hook `auto-save-hook' before saving.\n\n\ | |
570d7624 | 3456 | Non-nil first argument means do not print any message if successful.\n\ |
4746118a | 3457 | Non-nil second argument means save only current buffer.") |
17857782 JB |
3458 | (no_message, current_only) |
3459 | Lisp_Object no_message, current_only; | |
570d7624 JB |
3460 | { |
3461 | struct buffer *old = current_buffer, *b; | |
3462 | Lisp_Object tail, buf; | |
3463 | int auto_saved = 0; | |
3464 | char *omessage = echo_area_glyphs; | |
f05b275b | 3465 | int omessage_length = echo_area_glyphs_length; |
f14b1c68 JB |
3466 | extern int minibuf_level; |
3467 | int do_handled_files; | |
ff4c9993 RS |
3468 | Lisp_Object oquit; |
3469 | ||
3470 | /* Ordinarily don't quit within this function, | |
3471 | but don't make it impossible to quit (in case we get hung in I/O). */ | |
3472 | oquit = Vquit_flag; | |
3473 | Vquit_flag = Qnil; | |
570d7624 JB |
3474 | |
3475 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
3476 | point to non-strings reached from Vbuffer_alist. */ | |
3477 | ||
3478 | auto_saving = 1; | |
3479 | if (minibuf_level) | |
17857782 | 3480 | no_message = Qt; |
570d7624 | 3481 | |
265a9e55 | 3482 | if (!NILP (Vrun_hooks)) |
570d7624 JB |
3483 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
3484 | ||
f14b1c68 JB |
3485 | /* First, save all files which don't have handlers. If Emacs is |
3486 | crashing, the handlers may tweak what is causing Emacs to crash | |
3487 | in the first place, and it would be a shame if Emacs failed to | |
3488 | autosave perfectly ordinary files because it couldn't handle some | |
3489 | ange-ftp'd file. */ | |
3490 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) | |
3491 | for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons; | |
3492 | tail = XCONS (tail)->cdr) | |
3493 | { | |
3494 | buf = XCONS (XCONS (tail)->car)->cdr; | |
3495 | b = XBUFFER (buf); | |
17857782 | 3496 | |
f14b1c68 JB |
3497 | if (!NILP (current_only) |
3498 | && b != current_buffer) | |
3499 | continue; | |
17857782 | 3500 | |
f14b1c68 JB |
3501 | /* Check for auto save enabled |
3502 | and file changed since last auto save | |
3503 | and file changed since last real save. */ | |
3504 | if (XTYPE (b->auto_save_file_name) == Lisp_String | |
3505 | && b->save_modified < BUF_MODIFF (b) | |
3506 | && b->auto_save_modified < BUF_MODIFF (b) | |
82c2d839 RS |
3507 | /* -1 means we've turned off autosaving for a while--see below. */ |
3508 | && XINT (b->save_length) >= 0 | |
f14b1c68 JB |
3509 | && (do_handled_files |
3510 | || NILP (Ffind_file_name_handler (b->auto_save_file_name)))) | |
3511 | { | |
b60247d9 RS |
3512 | EMACS_TIME before_time, after_time; |
3513 | ||
3514 | EMACS_GET_TIME (before_time); | |
3515 | ||
3516 | /* If we had a failure, don't try again for 20 minutes. */ | |
3517 | if (b->auto_save_failure_time >= 0 | |
3518 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) | |
3519 | continue; | |
3520 | ||
f14b1c68 JB |
3521 | if ((XFASTINT (b->save_length) * 10 |
3522 | > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
3523 | /* A short file is likely to change a large fraction; | |
3524 | spare the user annoying messages. */ | |
3525 | && XFASTINT (b->save_length) > 5000 | |
3526 | /* These messages are frequent and annoying for `*mail*'. */ | |
3527 | && !EQ (b->filename, Qnil) | |
3528 | && NILP (no_message)) | |
3529 | { | |
3530 | /* It has shrunk too much; turn off auto-saving here. */ | |
3531 | message ("Buffer %s has shrunk a lot; auto save turned off there", | |
3532 | XSTRING (b->name)->data); | |
82c2d839 RS |
3533 | /* Turn off auto-saving until there's a real save, |
3534 | and prevent any more warnings. */ | |
3535 | XSET (b->save_length, Lisp_Int, -1); | |
f14b1c68 JB |
3536 | Fsleep_for (make_number (1), Qnil); |
3537 | continue; | |
3538 | } | |
3539 | set_buffer_internal (b); | |
3540 | if (!auto_saved && NILP (no_message)) | |
3541 | message1 ("Auto-saving..."); | |
3542 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
3543 | auto_saved++; | |
3544 | b->auto_save_modified = BUF_MODIFF (b); | |
3545 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
3546 | set_buffer_internal (old); | |
b60247d9 RS |
3547 | |
3548 | EMACS_GET_TIME (after_time); | |
3549 | ||
3550 | /* If auto-save took more than 60 seconds, | |
3551 | assume it was an NFS failure that got a timeout. */ | |
3552 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) | |
3553 | b->auto_save_failure_time = EMACS_SECS (after_time); | |
f14b1c68 JB |
3554 | } |
3555 | } | |
570d7624 | 3556 | |
b67f2ca5 RS |
3557 | /* Prevent another auto save till enough input events come in. */ |
3558 | record_auto_save (); | |
570d7624 | 3559 | |
17857782 | 3560 | if (auto_saved && NILP (no_message)) |
f05b275b KH |
3561 | { |
3562 | if (omessage) | |
3563 | message2 (omessage, omessage_length); | |
3564 | else | |
3565 | message1 ("Auto-saving...done"); | |
3566 | } | |
570d7624 | 3567 | |
ff4c9993 RS |
3568 | Vquit_flag = oquit; |
3569 | ||
570d7624 JB |
3570 | auto_saving = 0; |
3571 | return Qnil; | |
3572 | } | |
3573 | ||
3574 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
3575 | Sset_buffer_auto_saved, 0, 0, 0, | |
3576 | "Mark current buffer as auto-saved with its current text.\n\ | |
3577 | No auto-save file will be written until the buffer changes again.") | |
3578 | () | |
3579 | { | |
3580 | current_buffer->auto_save_modified = MODIFF; | |
3581 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
b60247d9 RS |
3582 | current_buffer->auto_save_failure_time = -1; |
3583 | return Qnil; | |
3584 | } | |
3585 | ||
3586 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, | |
3587 | Sclear_buffer_auto_save_failure, 0, 0, 0, | |
3588 | "Clear any record of a recent auto-save failure in the current buffer.") | |
3589 | () | |
3590 | { | |
3591 | current_buffer->auto_save_failure_time = -1; | |
570d7624 JB |
3592 | return Qnil; |
3593 | } | |
3594 | ||
3595 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
3596 | 0, 0, 0, | |
3597 | "Return t if buffer has been auto-saved since last read in or saved.") | |
3598 | () | |
3599 | { | |
3600 | return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil; | |
3601 | } | |
3602 | \f | |
3603 | /* Reading and completing file names */ | |
3604 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); | |
3605 | ||
6e710ae5 RS |
3606 | /* In the string VAL, change each $ to $$ and return the result. */ |
3607 | ||
3608 | static Lisp_Object | |
3609 | double_dollars (val) | |
3610 | Lisp_Object val; | |
3611 | { | |
3612 | register unsigned char *old, *new; | |
3613 | register int n; | |
3614 | int osize, count; | |
3615 | ||
3616 | osize = XSTRING (val)->size; | |
3617 | /* Quote "$" as "$$" to get it past substitute-in-file-name */ | |
3618 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) | |
3619 | if (*old++ == '$') count++; | |
3620 | if (count > 0) | |
3621 | { | |
3622 | old = XSTRING (val)->data; | |
3623 | val = Fmake_string (make_number (osize + count), make_number (0)); | |
3624 | new = XSTRING (val)->data; | |
3625 | for (n = osize; n > 0; n--) | |
3626 | if (*old != '$') | |
3627 | *new++ = *old++; | |
3628 | else | |
3629 | { | |
3630 | *new++ = '$'; | |
3631 | *new++ = '$'; | |
3632 | old++; | |
3633 | } | |
3634 | } | |
3635 | return val; | |
3636 | } | |
3637 | ||
570d7624 JB |
3638 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, |
3639 | 3, 3, 0, | |
3640 | "Internal subroutine for read-file-name. Do not call this.") | |
3641 | (string, dir, action) | |
3642 | Lisp_Object string, dir, action; | |
3643 | /* action is nil for complete, t for return list of completions, | |
3644 | lambda for verify final value */ | |
3645 | { | |
3646 | Lisp_Object name, specdir, realdir, val, orig_string; | |
09121adc RS |
3647 | int changed; |
3648 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
3649 | ||
3650 | realdir = dir; | |
3651 | name = string; | |
3652 | orig_string = Qnil; | |
3653 | specdir = Qnil; | |
3654 | changed = 0; | |
3655 | /* No need to protect ACTION--we only compare it with t and nil. */ | |
3656 | GCPRO4 (string, realdir, name, specdir); | |
570d7624 JB |
3657 | |
3658 | if (XSTRING (string)->size == 0) | |
3659 | { | |
570d7624 | 3660 | if (EQ (action, Qlambda)) |
09121adc RS |
3661 | { |
3662 | UNGCPRO; | |
3663 | return Qnil; | |
3664 | } | |
570d7624 JB |
3665 | } |
3666 | else | |
3667 | { | |
3668 | orig_string = string; | |
3669 | string = Fsubstitute_in_file_name (string); | |
09121adc | 3670 | changed = NILP (Fstring_equal (string, orig_string)); |
570d7624 | 3671 | name = Ffile_name_nondirectory (string); |
09121adc RS |
3672 | val = Ffile_name_directory (string); |
3673 | if (! NILP (val)) | |
3674 | realdir = Fexpand_file_name (val, realdir); | |
570d7624 JB |
3675 | } |
3676 | ||
265a9e55 | 3677 | if (NILP (action)) |
570d7624 JB |
3678 | { |
3679 | specdir = Ffile_name_directory (string); | |
3680 | val = Ffile_name_completion (name, realdir); | |
09121adc | 3681 | UNGCPRO; |
570d7624 JB |
3682 | if (XTYPE (val) != Lisp_String) |
3683 | { | |
09121adc | 3684 | if (changed) |
570d7624 | 3685 | return string; |
09121adc | 3686 | return val; |
570d7624 JB |
3687 | } |
3688 | ||
265a9e55 | 3689 | if (!NILP (specdir)) |
570d7624 JB |
3690 | val = concat2 (specdir, val); |
3691 | #ifndef VMS | |
6e710ae5 RS |
3692 | return double_dollars (val); |
3693 | #else /* not VMS */ | |
09121adc | 3694 | return val; |
6e710ae5 | 3695 | #endif /* not VMS */ |
570d7624 | 3696 | } |
09121adc | 3697 | UNGCPRO; |
570d7624 JB |
3698 | |
3699 | if (EQ (action, Qt)) | |
3700 | return Ffile_name_all_completions (name, realdir); | |
3701 | /* Only other case actually used is ACTION = lambda */ | |
3702 | #ifdef VMS | |
3703 | /* Supposedly this helps commands such as `cd' that read directory names, | |
3704 | but can someone explain how it helps them? -- RMS */ | |
3705 | if (XSTRING (name)->size == 0) | |
3706 | return Qt; | |
3707 | #endif /* VMS */ | |
3708 | return Ffile_exists_p (string); | |
3709 | } | |
3710 | ||
3711 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, | |
3712 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ | |
3713 | Value is not expanded---you must call `expand-file-name' yourself.\n\ | |
3714 | Default name to DEFAULT if user enters a null string.\n\ | |
3715 | (If DEFAULT is omitted, the visited file name is used.)\n\ | |
3716 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ | |
3717 | Non-nil and non-t means also require confirmation after completion.\n\ | |
3718 | Fifth arg INITIAL specifies text to start with.\n\ | |
3719 | DIR defaults to current buffer's directory default.") | |
3720 | (prompt, dir, defalt, mustmatch, initial) | |
3721 | Lisp_Object prompt, dir, defalt, mustmatch, initial; | |
3722 | { | |
85b5fe07 | 3723 | Lisp_Object val, insdef, insdef1, tem; |
570d7624 JB |
3724 | struct gcpro gcpro1, gcpro2; |
3725 | register char *homedir; | |
3726 | int count; | |
3727 | ||
265a9e55 | 3728 | if (NILP (dir)) |
570d7624 | 3729 | dir = current_buffer->directory; |
265a9e55 | 3730 | if (NILP (defalt)) |
570d7624 JB |
3731 | defalt = current_buffer->filename; |
3732 | ||
3733 | /* If dir starts with user's homedir, change that to ~. */ | |
3734 | homedir = (char *) egetenv ("HOME"); | |
3735 | if (homedir != 0 | |
3736 | && XTYPE (dir) == Lisp_String | |
3737 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) | |
3738 | && XSTRING (dir)->data[strlen (homedir)] == '/') | |
3739 | { | |
3740 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, | |
3741 | XSTRING (dir)->size - strlen (homedir) + 1); | |
3742 | XSTRING (dir)->data[0] = '~'; | |
3743 | } | |
3744 | ||
3745 | if (insert_default_directory) | |
3746 | { | |
3747 | insdef = dir; | |
265a9e55 | 3748 | if (!NILP (initial)) |
570d7624 | 3749 | { |
15c65264 | 3750 | Lisp_Object args[2], pos; |
570d7624 JB |
3751 | |
3752 | args[0] = insdef; | |
3753 | args[1] = initial; | |
3754 | insdef = Fconcat (2, args); | |
351bd676 | 3755 | pos = make_number (XSTRING (double_dollars (dir))->size); |
6e710ae5 | 3756 | insdef1 = Fcons (double_dollars (insdef), pos); |
570d7624 | 3757 | } |
6e710ae5 RS |
3758 | else |
3759 | insdef1 = double_dollars (insdef); | |
570d7624 | 3760 | } |
351bd676 KH |
3761 | else if (!NILP (initial)) |
3762 | { | |
3763 | insdef = initial; | |
3764 | insdef1 = Fcons (double_dollars (insdef), 0); | |
3765 | } | |
570d7624 | 3766 | else |
85b5fe07 | 3767 | insdef = Qnil, insdef1 = Qnil; |
570d7624 JB |
3768 | |
3769 | #ifdef VMS | |
3770 | count = specpdl_ptr - specpdl; | |
3771 | specbind (intern ("completion-ignore-case"), Qt); | |
3772 | #endif | |
3773 | ||
3774 | GCPRO2 (insdef, defalt); | |
3775 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), | |
85b5fe07 | 3776 | dir, mustmatch, insdef1, |
15c65264 | 3777 | Qfile_name_history); |
570d7624 JB |
3778 | |
3779 | #ifdef VMS | |
3780 | unbind_to (count, Qnil); | |
3781 | #endif | |
3782 | ||
3783 | UNGCPRO; | |
265a9e55 | 3784 | if (NILP (val)) |
570d7624 JB |
3785 | error ("No file name specified"); |
3786 | tem = Fstring_equal (val, insdef); | |
265a9e55 | 3787 | if (!NILP (tem) && !NILP (defalt)) |
570d7624 | 3788 | return defalt; |
b320926a | 3789 | if (XSTRING (val)->size == 0 && NILP (insdef)) |
d9bc1c99 RS |
3790 | { |
3791 | if (!NILP (defalt)) | |
3792 | return defalt; | |
3793 | else | |
3794 | error ("No default file name"); | |
3795 | } | |
570d7624 JB |
3796 | return Fsubstitute_in_file_name (val); |
3797 | } | |
3798 | ||
3799 | #if 0 /* Old version */ | |
3800 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, | |
0de25302 KH |
3801 | /* Don't confuse make-docfile by having two doc strings for this function. |
3802 | make-docfile does not pay attention to #if, for good reason! */ | |
3803 | 0) | |
570d7624 JB |
3804 | (prompt, dir, defalt, mustmatch, initial) |
3805 | Lisp_Object prompt, dir, defalt, mustmatch, initial; | |
3806 | { | |
3807 | Lisp_Object val, insdef, tem; | |
3808 | struct gcpro gcpro1, gcpro2; | |
3809 | register char *homedir; | |
3810 | int count; | |
3811 | ||
265a9e55 | 3812 | if (NILP (dir)) |
570d7624 | 3813 | dir = current_buffer->directory; |
265a9e55 | 3814 | if (NILP (defalt)) |
570d7624 JB |
3815 | defalt = current_buffer->filename; |
3816 | ||
3817 | /* If dir starts with user's homedir, change that to ~. */ | |
3818 | homedir = (char *) egetenv ("HOME"); | |
3819 | if (homedir != 0 | |
3820 | && XTYPE (dir) == Lisp_String | |
3821 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) | |
3822 | && XSTRING (dir)->data[strlen (homedir)] == '/') | |
3823 | { | |
3824 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, | |
3825 | XSTRING (dir)->size - strlen (homedir) + 1); | |
3826 | XSTRING (dir)->data[0] = '~'; | |
3827 | } | |
3828 | ||
265a9e55 | 3829 | if (!NILP (initial)) |
570d7624 JB |
3830 | insdef = initial; |
3831 | else if (insert_default_directory) | |
3832 | insdef = dir; | |
3833 | else | |
3834 | insdef = build_string (""); | |
3835 | ||
3836 | #ifdef VMS | |
3837 | count = specpdl_ptr - specpdl; | |
3838 | specbind (intern ("completion-ignore-case"), Qt); | |
3839 | #endif | |
3840 | ||
3841 | GCPRO2 (insdef, defalt); | |
3842 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), | |
3843 | dir, mustmatch, | |
15c65264 RS |
3844 | insert_default_directory ? insdef : Qnil, |
3845 | Qfile_name_history); | |
570d7624 JB |
3846 | |
3847 | #ifdef VMS | |
3848 | unbind_to (count, Qnil); | |
3849 | #endif | |
3850 | ||
3851 | UNGCPRO; | |
265a9e55 | 3852 | if (NILP (val)) |
570d7624 JB |
3853 | error ("No file name specified"); |
3854 | tem = Fstring_equal (val, insdef); | |
265a9e55 | 3855 | if (!NILP (tem) && !NILP (defalt)) |
570d7624 JB |
3856 | return defalt; |
3857 | return Fsubstitute_in_file_name (val); | |
3858 | } | |
3859 | #endif /* Old version */ | |
3860 | \f | |
3861 | syms_of_fileio () | |
3862 | { | |
0bf2eed2 RS |
3863 | Qexpand_file_name = intern ("expand-file-name"); |
3864 | Qdirectory_file_name = intern ("directory-file-name"); | |
3865 | Qfile_name_directory = intern ("file-name-directory"); | |
3866 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); | |
642ef245 | 3867 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
0bf2eed2 | 3868 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
32f4334d RS |
3869 | Qcopy_file = intern ("copy-file"); |
3870 | Qmake_directory = intern ("make-directory"); | |
3871 | Qdelete_directory = intern ("delete-directory"); | |
3872 | Qdelete_file = intern ("delete-file"); | |
3873 | Qrename_file = intern ("rename-file"); | |
3874 | Qadd_name_to_file = intern ("add-name-to-file"); | |
3875 | Qmake_symbolic_link = intern ("make-symbolic-link"); | |
3876 | Qfile_exists_p = intern ("file-exists-p"); | |
3877 | Qfile_executable_p = intern ("file-executable-p"); | |
3878 | Qfile_readable_p = intern ("file-readable-p"); | |
3879 | Qfile_symlink_p = intern ("file-symlink-p"); | |
3880 | Qfile_writable_p = intern ("file-writable-p"); | |
3881 | Qfile_directory_p = intern ("file-directory-p"); | |
3882 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); | |
3883 | Qfile_modes = intern ("file-modes"); | |
3884 | Qset_file_modes = intern ("set-file-modes"); | |
3885 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); | |
3886 | Qinsert_file_contents = intern ("insert-file-contents"); | |
3887 | Qwrite_region = intern ("write-region"); | |
3888 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); | |
3ec46acd | 3889 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
32f4334d | 3890 | |
642ef245 JB |
3891 | staticpro (&Qexpand_file_name); |
3892 | staticpro (&Qdirectory_file_name); | |
3893 | staticpro (&Qfile_name_directory); | |
3894 | staticpro (&Qfile_name_nondirectory); | |
3895 | staticpro (&Qunhandled_file_name_directory); | |
3896 | staticpro (&Qfile_name_as_directory); | |
15c65264 RS |
3897 | staticpro (&Qcopy_file); |
3898 | staticpro (&Qmake_directory); | |
3899 | staticpro (&Qdelete_directory); | |
3900 | staticpro (&Qdelete_file); | |
3901 | staticpro (&Qrename_file); | |
3902 | staticpro (&Qadd_name_to_file); | |
3903 | staticpro (&Qmake_symbolic_link); | |
3904 | staticpro (&Qfile_exists_p); | |
3905 | staticpro (&Qfile_executable_p); | |
3906 | staticpro (&Qfile_readable_p); | |
3907 | staticpro (&Qfile_symlink_p); | |
3908 | staticpro (&Qfile_writable_p); | |
3909 | staticpro (&Qfile_directory_p); | |
3910 | staticpro (&Qfile_accessible_directory_p); | |
3911 | staticpro (&Qfile_modes); | |
3912 | staticpro (&Qset_file_modes); | |
3913 | staticpro (&Qfile_newer_than_file_p); | |
3914 | staticpro (&Qinsert_file_contents); | |
3915 | staticpro (&Qwrite_region); | |
3916 | staticpro (&Qverify_visited_file_modtime); | |
642ef245 JB |
3917 | |
3918 | Qfile_name_history = intern ("file-name-history"); | |
3919 | Fset (Qfile_name_history, Qnil); | |
15c65264 RS |
3920 | staticpro (&Qfile_name_history); |
3921 | ||
570d7624 JB |
3922 | Qfile_error = intern ("file-error"); |
3923 | staticpro (&Qfile_error); | |
3924 | Qfile_already_exists = intern("file-already-exists"); | |
3925 | staticpro (&Qfile_already_exists); | |
3926 | ||
4c3c22f3 RS |
3927 | #ifdef MSDOS |
3928 | Qfind_buffer_file_type = intern ("find-buffer-file-type"); | |
3929 | staticpro (&Qfind_buffer_file_type); | |
3930 | #endif | |
3931 | ||
d6a3cc15 RS |
3932 | Qcar_less_than_car = intern ("car-less-than-car"); |
3933 | staticpro (&Qcar_less_than_car); | |
3934 | ||
570d7624 JB |
3935 | Fput (Qfile_error, Qerror_conditions, |
3936 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); | |
3937 | Fput (Qfile_error, Qerror_message, | |
3938 | build_string ("File error")); | |
3939 | ||
3940 | Fput (Qfile_already_exists, Qerror_conditions, | |
3941 | Fcons (Qfile_already_exists, | |
3942 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); | |
3943 | Fput (Qfile_already_exists, Qerror_message, | |
3944 | build_string ("File already exists")); | |
3945 | ||
3946 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, | |
3947 | "*Non-nil means when reading a filename start with default dir in minibuffer."); | |
3948 | insert_default_directory = 1; | |
3949 | ||
3950 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, | |
3951 | "*Non-nil means write new files with record format `stmlf'.\n\ | |
3952 | nil means use format `var'. This variable is meaningful only on VMS."); | |
3953 | vms_stmlf_recfm = 0; | |
3954 | ||
1d1826db RS |
3955 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
3956 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ | |
3957 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ | |
3958 | HANDLER.\n\ | |
3959 | \n\ | |
3960 | The first argument given to HANDLER is the name of the I/O primitive\n\ | |
3961 | to be handled; the remaining arguments are the arguments that were\n\ | |
3962 | passed to that primitive. For example, if you do\n\ | |
3963 | (file-exists-p FILENAME)\n\ | |
3964 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ | |
642ef245 JB |
3965 | (funcall HANDLER 'file-exists-p FILENAME)\n\ |
3966 | The function `find-file-name-handler' checks this list for a handler\n\ | |
3967 | for its argument."); | |
09121adc RS |
3968 | Vfile_name_handler_alist = Qnil; |
3969 | ||
d6a3cc15 | 3970 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
246cfea5 RS |
3971 | "A list of functions to be called at the end of `insert-file-contents'.\n\ |
3972 | Each is passed one argument, the number of bytes inserted. It should return\n\ | |
3973 | the new byte count, and leave point the same. If `insert-file-contents' is\n\ | |
3974 | intercepted by a handler from `file-name-handler-alist', that handler is\n\ | |
d6a3cc15 RS |
3975 | responsible for calling the after-insert-file-functions if appropriate."); |
3976 | Vafter_insert_file_functions = Qnil; | |
3977 | ||
3978 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, | |
246cfea5 RS |
3979 | "A list of functions to be called at the start of `write-region'.\n\ |
3980 | Each is passed two arguments, START and END as for `write-region'. It should\n\ | |
3981 | return a list of pairs (POSITION . STRING) of strings to be effectively\n\ | |
3982 | inserted at the specified positions of the file being written (1 means to\n\ | |
3983 | insert before the first byte written). The POSITIONs must be sorted into\n\ | |
3984 | increasing order. If there are several functions in the list, the several\n\ | |
d6a3cc15 RS |
3985 | lists are merged destructively."); |
3986 | Vwrite_region_annotate_functions = Qnil; | |
3987 | ||
82c2d839 RS |
3988 | DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers, |
3989 | "A list of file names for which handlers should not be used."); | |
3990 | Vinhibit_file_name_handlers = Qnil; | |
3991 | ||
642ef245 | 3992 | defsubr (&Sfind_file_name_handler); |
570d7624 JB |
3993 | defsubr (&Sfile_name_directory); |
3994 | defsubr (&Sfile_name_nondirectory); | |
642ef245 | 3995 | defsubr (&Sunhandled_file_name_directory); |
570d7624 JB |
3996 | defsubr (&Sfile_name_as_directory); |
3997 | defsubr (&Sdirectory_file_name); | |
3998 | defsubr (&Smake_temp_name); | |
3999 | defsubr (&Sexpand_file_name); | |
4000 | defsubr (&Ssubstitute_in_file_name); | |
4001 | defsubr (&Scopy_file); | |
9bbe01fb | 4002 | defsubr (&Smake_directory_internal); |
aa734e17 | 4003 | defsubr (&Sdelete_directory); |
570d7624 JB |
4004 | defsubr (&Sdelete_file); |
4005 | defsubr (&Srename_file); | |
4006 | defsubr (&Sadd_name_to_file); | |
4007 | #ifdef S_IFLNK | |
4008 | defsubr (&Smake_symbolic_link); | |
4009 | #endif /* S_IFLNK */ | |
4010 | #ifdef VMS | |
4011 | defsubr (&Sdefine_logical_name); | |
4012 | #endif /* VMS */ | |
4013 | #ifdef HPUX_NET | |
4014 | defsubr (&Ssysnetunam); | |
4015 | #endif /* HPUX_NET */ | |
4016 | defsubr (&Sfile_name_absolute_p); | |
4017 | defsubr (&Sfile_exists_p); | |
4018 | defsubr (&Sfile_executable_p); | |
4019 | defsubr (&Sfile_readable_p); | |
4020 | defsubr (&Sfile_writable_p); | |
4021 | defsubr (&Sfile_symlink_p); | |
4022 | defsubr (&Sfile_directory_p); | |
b72dea2a | 4023 | defsubr (&Sfile_accessible_directory_p); |
570d7624 JB |
4024 | defsubr (&Sfile_modes); |
4025 | defsubr (&Sset_file_modes); | |
c24e9a53 RS |
4026 | defsubr (&Sset_default_file_modes); |
4027 | defsubr (&Sdefault_file_modes); | |
570d7624 JB |
4028 | defsubr (&Sfile_newer_than_file_p); |
4029 | defsubr (&Sinsert_file_contents); | |
4030 | defsubr (&Swrite_region); | |
d6a3cc15 | 4031 | defsubr (&Scar_less_than_car); |
570d7624 JB |
4032 | defsubr (&Sverify_visited_file_modtime); |
4033 | defsubr (&Sclear_visited_file_modtime); | |
f5d5eccf | 4034 | defsubr (&Svisited_file_modtime); |
570d7624 JB |
4035 | defsubr (&Sset_visited_file_modtime); |
4036 | defsubr (&Sdo_auto_save); | |
4037 | defsubr (&Sset_buffer_auto_saved); | |
b60247d9 | 4038 | defsubr (&Sclear_buffer_auto_save_failure); |
570d7624 JB |
4039 | defsubr (&Srecent_auto_save_p); |
4040 | ||
4041 | defsubr (&Sread_file_name_internal); | |
4042 | defsubr (&Sread_file_name); | |
85ffea93 | 4043 | |
483a2e10 | 4044 | #ifdef unix |
85ffea93 | 4045 | defsubr (&Sunix_sync); |
483a2e10 | 4046 | #endif |
570d7624 | 4047 | } |