Commit | Line | Data |
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570d7624 | 1 | /* File IO for GNU Emacs. |
4746118a | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1992 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 | ||
ffd56f97 | 20 | #include "config.h" |
570d7624 JB |
21 | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
bfb61299 JB |
24 | |
25 | #ifdef VMS | |
de5bf5d3 | 26 | #include "vms-pwd.h" |
bfb61299 | 27 | #else |
570d7624 | 28 | #include <pwd.h> |
bfb61299 JB |
29 | #endif |
30 | ||
570d7624 | 31 | #include <ctype.h> |
bfb61299 JB |
32 | |
33 | #ifdef VMS | |
34 | #include "dir.h" | |
35 | #include <perror.h> | |
36 | #include <stddef.h> | |
37 | #include <string.h> | |
38 | #else | |
570d7624 | 39 | #include <sys/dir.h> |
bfb61299 JB |
40 | #endif |
41 | ||
570d7624 JB |
42 | #include <errno.h> |
43 | ||
bfb61299 | 44 | #ifndef vax11c |
570d7624 JB |
45 | extern int errno; |
46 | extern char *sys_errlist[]; | |
47 | extern int sys_nerr; | |
48 | #endif | |
49 | ||
50 | #define err_str(a) ((a) < sys_nerr ? sys_errlist[a] : "unknown error") | |
51 | ||
52 | #ifdef APOLLO | |
53 | #include <sys/time.h> | |
54 | #endif | |
55 | ||
570d7624 JB |
56 | #include "lisp.h" |
57 | #include "buffer.h" | |
58 | #include "window.h" | |
59 | ||
60 | #ifdef VMS | |
570d7624 JB |
61 | #include <file.h> |
62 | #include <rmsdef.h> | |
63 | #include <fab.h> | |
64 | #include <nam.h> | |
65 | #endif | |
66 | ||
de5bf5d3 | 67 | #include "systime.h" |
570d7624 JB |
68 | |
69 | #ifdef HPUX | |
70 | #include <netio.h> | |
9b7828a5 | 71 | #ifndef HPUX8 |
570d7624 JB |
72 | #include <errnet.h> |
73 | #endif | |
9b7828a5 | 74 | #endif |
570d7624 JB |
75 | |
76 | #ifndef O_WRONLY | |
77 | #define O_WRONLY 1 | |
78 | #endif | |
79 | ||
80 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
81 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
82 | ||
83 | /* Nonzero during writing of auto-save files */ | |
84 | int auto_saving; | |
85 | ||
86 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create | |
87 | a new file with the same mode as the original */ | |
88 | int auto_save_mode_bits; | |
89 | ||
32f4334d RS |
90 | /* Alist of elements (REGEXP . HANDLER) for file names |
91 | whose I/O is done with a special handler. */ | |
92 | Lisp_Object Vfile_name_handler_alist; | |
93 | ||
570d7624 JB |
94 | /* Nonzero means, when reading a filename in the minibuffer, |
95 | start out by inserting the default directory into the minibuffer. */ | |
96 | int insert_default_directory; | |
97 | ||
98 | /* On VMS, nonzero means write new files with record format stmlf. | |
99 | Zero means use var format. */ | |
100 | int vms_stmlf_recfm; | |
101 | ||
102 | Lisp_Object Qfile_error, Qfile_already_exists; | |
103 | ||
15c65264 RS |
104 | Lisp_Object Qfile_name_history; |
105 | ||
570d7624 JB |
106 | report_file_error (string, data) |
107 | char *string; | |
108 | Lisp_Object data; | |
109 | { | |
110 | Lisp_Object errstring; | |
111 | ||
112 | if (errno >= 0 && errno < sys_nerr) | |
113 | errstring = build_string (sys_errlist[errno]); | |
114 | else | |
115 | errstring = build_string ("undocumented error code"); | |
116 | ||
117 | /* System error messages are capitalized. Downcase the initial | |
118 | unless it is followed by a slash. */ | |
119 | if (XSTRING (errstring)->data[1] != '/') | |
120 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); | |
121 | ||
122 | while (1) | |
123 | Fsignal (Qfile_error, | |
124 | Fcons (build_string (string), Fcons (errstring, data))); | |
125 | } | |
b5148e85 RS |
126 | |
127 | close_file_unwind (fd) | |
128 | Lisp_Object fd; | |
129 | { | |
130 | close (XFASTINT (fd)); | |
131 | } | |
570d7624 | 132 | \f |
32f4334d RS |
133 | Lisp_Object Qcopy_file; |
134 | Lisp_Object Qmake_directory; | |
135 | Lisp_Object Qdelete_directory; | |
136 | Lisp_Object Qdelete_file; | |
137 | Lisp_Object Qrename_file; | |
138 | Lisp_Object Qadd_name_to_file; | |
139 | Lisp_Object Qmake_symbolic_link; | |
140 | Lisp_Object Qfile_exists_p; | |
141 | Lisp_Object Qfile_executable_p; | |
142 | Lisp_Object Qfile_readable_p; | |
143 | Lisp_Object Qfile_symlink_p; | |
144 | Lisp_Object Qfile_writable_p; | |
145 | Lisp_Object Qfile_directory_p; | |
146 | Lisp_Object Qfile_accessible_directory_p; | |
147 | Lisp_Object Qfile_modes; | |
148 | Lisp_Object Qset_file_modes; | |
149 | Lisp_Object Qfile_newer_than_file_p; | |
150 | Lisp_Object Qinsert_file_contents; | |
151 | Lisp_Object Qwrite_region; | |
152 | Lisp_Object Qverify_visited_file_modtime; | |
153 | ||
154 | /* If FILENAME is handled specially on account of its syntax, | |
155 | return its handler function. Otherwise, return nil. */ | |
156 | ||
157 | Lisp_Object | |
158 | find_file_handler (filename) | |
159 | Lisp_Object filename; | |
160 | { | |
161 | Lisp_Object chain; | |
3eac9910 | 162 | for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons; |
32f4334d RS |
163 | chain = XCONS (chain)->cdr) |
164 | { | |
165 | Lisp_Object elt; | |
166 | elt = XCONS (chain)->car; | |
167 | if (XTYPE (elt) == Lisp_Cons) | |
168 | { | |
169 | Lisp_Object string; | |
170 | string = XCONS (elt)->car; | |
171 | if (XTYPE (string) == Lisp_String | |
172 | && fast_string_match (string, filename)) | |
173 | return XCONS (elt)->cdr; | |
174 | } | |
175 | } | |
176 | return Qnil; | |
177 | } | |
178 | \f | |
570d7624 JB |
179 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
180 | 1, 1, 0, | |
181 | "Return the directory component in file name NAME.\n\ | |
182 | Return nil if NAME does not include a directory.\n\ | |
183 | Otherwise return a directory spec.\n\ | |
184 | Given a Unix syntax file name, returns a string ending in slash;\n\ | |
185 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") | |
186 | (file) | |
187 | Lisp_Object file; | |
188 | { | |
189 | register unsigned char *beg; | |
190 | register unsigned char *p; | |
191 | ||
192 | CHECK_STRING (file, 0); | |
193 | ||
194 | beg = XSTRING (file)->data; | |
195 | p = beg + XSTRING (file)->size; | |
196 | ||
197 | while (p != beg && p[-1] != '/' | |
198 | #ifdef VMS | |
199 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
200 | #endif /* VMS */ | |
201 | ) p--; | |
202 | ||
203 | if (p == beg) | |
204 | return Qnil; | |
205 | return make_string (beg, p - beg); | |
206 | } | |
207 | ||
208 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, | |
209 | 1, 1, 0, | |
210 | "Return file name NAME sans its directory.\n\ | |
211 | For example, in a Unix-syntax file name,\n\ | |
212 | this is everything after the last slash,\n\ | |
213 | or the entire name if it contains no slash.") | |
214 | (file) | |
215 | Lisp_Object file; | |
216 | { | |
217 | register unsigned char *beg, *p, *end; | |
218 | ||
219 | CHECK_STRING (file, 0); | |
220 | ||
221 | beg = XSTRING (file)->data; | |
222 | end = p = beg + XSTRING (file)->size; | |
223 | ||
224 | while (p != beg && p[-1] != '/' | |
225 | #ifdef VMS | |
226 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' | |
227 | #endif /* VMS */ | |
228 | ) p--; | |
229 | ||
230 | return make_string (p, end - p); | |
231 | } | |
232 | \f | |
233 | char * | |
234 | file_name_as_directory (out, in) | |
235 | char *out, *in; | |
236 | { | |
237 | int size = strlen (in) - 1; | |
238 | ||
239 | strcpy (out, in); | |
240 | ||
241 | #ifdef VMS | |
242 | /* Is it already a directory string? */ | |
243 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') | |
244 | return out; | |
245 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ | |
246 | else if (! index (in, '/') | |
247 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) | |
248 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) | |
249 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) | |
250 | || ! strncmp (&in[size - 5], ".dir", 4)) | |
251 | && (in[size - 1] == '.' || in[size - 1] == ';') | |
252 | && in[size] == '1'))) | |
253 | { | |
254 | register char *p, *dot; | |
255 | char brack; | |
256 | ||
257 | /* x.dir -> [.x] | |
258 | dir:x.dir --> dir:[x] | |
259 | dir:[x]y.dir --> dir:[x.y] */ | |
260 | p = in + size; | |
261 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; | |
262 | if (p != in) | |
263 | { | |
264 | strncpy (out, in, p - in); | |
265 | out[p - in] = '\0'; | |
266 | if (*p == ':') | |
267 | { | |
268 | brack = ']'; | |
269 | strcat (out, ":["); | |
270 | } | |
271 | else | |
272 | { | |
273 | brack = *p; | |
274 | strcat (out, "."); | |
275 | } | |
276 | p++; | |
277 | } | |
278 | else | |
279 | { | |
280 | brack = ']'; | |
281 | strcpy (out, "[."); | |
282 | } | |
bfb61299 JB |
283 | dot = index (p, '.'); |
284 | if (dot) | |
570d7624 JB |
285 | { |
286 | /* blindly remove any extension */ | |
287 | size = strlen (out) + (dot - p); | |
288 | strncat (out, p, dot - p); | |
289 | } | |
290 | else | |
291 | { | |
292 | strcat (out, p); | |
293 | size = strlen (out); | |
294 | } | |
295 | out[size++] = brack; | |
296 | out[size] = '\0'; | |
297 | } | |
298 | #else /* not VMS */ | |
299 | /* For Unix syntax, Append a slash if necessary */ | |
300 | if (out[size] != '/') | |
301 | strcat (out, "/"); | |
302 | #endif /* not VMS */ | |
303 | return out; | |
304 | } | |
305 | ||
306 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, | |
307 | Sfile_name_as_directory, 1, 1, 0, | |
308 | "Return a string representing file FILENAME interpreted as a directory.\n\ | |
309 | This operation exists because a directory is also a file, but its name as\n\ | |
310 | a directory is different from its name as a file.\n\ | |
311 | The result can be used as the value of `default-directory'\n\ | |
312 | or passed as second argument to `expand-file-name'.\n\ | |
313 | For a Unix-syntax file name, just appends a slash.\n\ | |
314 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") | |
315 | (file) | |
316 | Lisp_Object file; | |
317 | { | |
318 | char *buf; | |
319 | ||
320 | CHECK_STRING (file, 0); | |
265a9e55 | 321 | if (NILP (file)) |
570d7624 JB |
322 | return Qnil; |
323 | buf = (char *) alloca (XSTRING (file)->size + 10); | |
324 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); | |
325 | } | |
326 | \f | |
327 | /* | |
328 | * Convert from directory name to filename. | |
329 | * On VMS: | |
330 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 | |
331 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 | |
332 | * On UNIX, it's simple: just make sure there is a terminating / | |
333 | ||
334 | * Value is nonzero if the string output is different from the input. | |
335 | */ | |
336 | ||
337 | directory_file_name (src, dst) | |
338 | char *src, *dst; | |
339 | { | |
340 | long slen; | |
341 | #ifdef VMS | |
342 | long rlen; | |
343 | char * ptr, * rptr; | |
344 | char bracket; | |
345 | struct FAB fab = cc$rms_fab; | |
346 | struct NAM nam = cc$rms_nam; | |
347 | char esa[NAM$C_MAXRSS]; | |
348 | #endif /* VMS */ | |
349 | ||
350 | slen = strlen (src); | |
351 | #ifdef VMS | |
352 | if (! index (src, '/') | |
353 | && (src[slen - 1] == ']' | |
354 | || src[slen - 1] == ':' | |
355 | || src[slen - 1] == '>')) | |
356 | { | |
357 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ | |
358 | fab.fab$l_fna = src; | |
359 | fab.fab$b_fns = slen; | |
360 | fab.fab$l_nam = &nam; | |
361 | fab.fab$l_fop = FAB$M_NAM; | |
362 | ||
363 | nam.nam$l_esa = esa; | |
364 | nam.nam$b_ess = sizeof esa; | |
365 | nam.nam$b_nop |= NAM$M_SYNCHK; | |
366 | ||
367 | /* We call SYS$PARSE to handle such things as [--] for us. */ | |
368 | if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL) | |
369 | { | |
370 | slen = nam.nam$b_esl; | |
371 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') | |
372 | slen -= 2; | |
373 | esa[slen] = '\0'; | |
374 | src = esa; | |
375 | } | |
376 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
377 | { | |
378 | /* what about when we have logical_name:???? */ | |
379 | if (src[slen - 1] == ':') | |
380 | { /* Xlate logical name and see what we get */ | |
381 | ptr = strcpy (dst, src); /* upper case for getenv */ | |
382 | while (*ptr) | |
383 | { | |
384 | if ('a' <= *ptr && *ptr <= 'z') | |
385 | *ptr -= 040; | |
386 | ptr++; | |
387 | } | |
388 | dst[slen - 1] = 0; /* remove colon */ | |
389 | if (!(src = egetenv (dst))) | |
390 | return 0; | |
391 | /* should we jump to the beginning of this procedure? | |
392 | Good points: allows us to use logical names that xlate | |
393 | to Unix names, | |
394 | Bad points: can be a problem if we just translated to a device | |
395 | name... | |
396 | For now, I'll punt and always expect VMS names, and hope for | |
397 | the best! */ | |
398 | slen = strlen (src); | |
399 | if (src[slen - 1] != ']' && src[slen - 1] != '>') | |
400 | { /* no recursion here! */ | |
401 | strcpy (dst, src); | |
402 | return 0; | |
403 | } | |
404 | } | |
405 | else | |
406 | { /* not a directory spec */ | |
407 | strcpy (dst, src); | |
408 | return 0; | |
409 | } | |
410 | } | |
411 | bracket = src[slen - 1]; | |
412 | ||
413 | /* If bracket is ']' or '>', bracket - 2 is the corresponding | |
414 | opening bracket. */ | |
bfb61299 JB |
415 | ptr = index (src, bracket - 2); |
416 | if (ptr == 0) | |
570d7624 JB |
417 | { /* no opening bracket */ |
418 | strcpy (dst, src); | |
419 | return 0; | |
420 | } | |
421 | if (!(rptr = rindex (src, '.'))) | |
422 | rptr = ptr; | |
423 | slen = rptr - src; | |
424 | strncpy (dst, src, slen); | |
425 | dst[slen] = '\0'; | |
426 | if (*rptr == '.') | |
427 | { | |
428 | dst[slen++] = bracket; | |
429 | dst[slen] = '\0'; | |
430 | } | |
431 | else | |
432 | { | |
433 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), | |
434 | then translate the device and recurse. */ | |
435 | if (dst[slen - 1] == ':' | |
436 | && dst[slen - 2] != ':' /* skip decnet nodes */ | |
437 | && strcmp(src + slen, "[000000]") == 0) | |
438 | { | |
439 | dst[slen - 1] = '\0'; | |
440 | if ((ptr = egetenv (dst)) | |
441 | && (rlen = strlen (ptr) - 1) > 0 | |
442 | && (ptr[rlen] == ']' || ptr[rlen] == '>') | |
443 | && ptr[rlen - 1] == '.') | |
444 | { | |
445 | ptr[rlen - 1] = ']'; | |
446 | ptr[rlen] = '\0'; | |
447 | return directory_file_name (ptr, dst); | |
448 | } | |
449 | else | |
450 | dst[slen - 1] = ':'; | |
451 | } | |
452 | strcat (dst, "[000000]"); | |
453 | slen += 8; | |
454 | } | |
455 | rptr++; | |
456 | rlen = strlen (rptr) - 1; | |
457 | strncat (dst, rptr, rlen); | |
458 | dst[slen + rlen] = '\0'; | |
459 | strcat (dst, ".DIR.1"); | |
460 | return 1; | |
461 | } | |
462 | #endif /* VMS */ | |
463 | /* Process as Unix format: just remove any final slash. | |
464 | But leave "/" unchanged; do not change it to "". */ | |
465 | strcpy (dst, src); | |
4746118a | 466 | if (slen > 1 && dst[slen - 1] == '/') |
570d7624 JB |
467 | dst[slen - 1] = 0; |
468 | return 1; | |
469 | } | |
470 | ||
471 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, | |
472 | 1, 1, 0, | |
473 | "Returns the file name of the directory named DIR.\n\ | |
474 | This is the name of the file that holds the data for the directory DIR.\n\ | |
475 | This operation exists because a directory is also a file, but its name as\n\ | |
476 | a directory is different from its name as a file.\n\ | |
477 | In Unix-syntax, this function just removes the final slash.\n\ | |
478 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ | |
479 | it returns a file name such as \"[X]Y.DIR.1\".") | |
480 | (directory) | |
481 | Lisp_Object directory; | |
482 | { | |
483 | char *buf; | |
484 | ||
485 | CHECK_STRING (directory, 0); | |
486 | ||
265a9e55 | 487 | if (NILP (directory)) |
570d7624 JB |
488 | return Qnil; |
489 | #ifdef VMS | |
490 | /* 20 extra chars is insufficient for VMS, since we might perform a | |
491 | logical name translation. an equivalence string can be up to 255 | |
492 | chars long, so grab that much extra space... - sss */ | |
493 | buf = (char *) alloca (XSTRING (directory)->size + 20 + 255); | |
494 | #else | |
495 | buf = (char *) alloca (XSTRING (directory)->size + 20); | |
496 | #endif | |
497 | directory_file_name (XSTRING (directory)->data, buf); | |
498 | return build_string (buf); | |
499 | } | |
500 | ||
501 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, | |
502 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ | |
503 | The Emacs process number forms part of the result,\n\ | |
504 | so there is no danger of generating a name being used by another process.") | |
505 | (prefix) | |
506 | Lisp_Object prefix; | |
507 | { | |
508 | Lisp_Object val; | |
509 | val = concat2 (prefix, build_string ("XXXXXX")); | |
510 | mktemp (XSTRING (val)->data); | |
511 | return val; | |
512 | } | |
513 | \f | |
514 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
515 | "Convert FILENAME to absolute, and canonicalize it.\n\ | |
516 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
517 | (does not start with slash); if DEFAULT is nil or missing,\n\ | |
518 | the current buffer's value of default-directory is used.\n\ | |
b72dea2a JB |
519 | Path components that are `.' are removed, and \n\ |
520 | path components followed by `..' are removed, along with the `..' itself;\n\ | |
521 | note that these simplifications are done without checking the resulting\n\ | |
522 | paths in the file system.\n\ | |
523 | An initial `~/' expands to your home directory.\n\ | |
524 | An initial `~USER/' expands to USER's home directory.\n\ | |
570d7624 JB |
525 | See also the function `substitute-in-file-name'.") |
526 | (name, defalt) | |
527 | Lisp_Object name, defalt; | |
528 | { | |
529 | unsigned char *nm; | |
530 | ||
531 | register unsigned char *newdir, *p, *o; | |
532 | int tlen; | |
533 | unsigned char *target; | |
534 | struct passwd *pw; | |
535 | int lose; | |
536 | #ifdef VMS | |
537 | unsigned char * colon = 0; | |
538 | unsigned char * close = 0; | |
539 | unsigned char * slash = 0; | |
540 | unsigned char * brack = 0; | |
541 | int lbrack = 0, rbrack = 0; | |
542 | int dots = 0; | |
543 | #endif /* VMS */ | |
544 | ||
545 | CHECK_STRING (name, 0); | |
546 | ||
547 | #ifdef VMS | |
548 | /* Filenames on VMS are always upper case. */ | |
549 | name = Fupcase (name); | |
550 | #endif | |
551 | ||
552 | nm = XSTRING (name)->data; | |
553 | ||
554 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
555 | If no /./ or /../ we can return right away. */ | |
556 | if ( | |
557 | nm[0] == '/' | |
558 | #ifdef VMS | |
559 | || index (nm, ':') | |
560 | #endif /* VMS */ | |
561 | ) | |
562 | { | |
563 | p = nm; | |
564 | lose = 0; | |
565 | while (*p) | |
566 | { | |
567 | if (p[0] == '/' && p[1] == '/' | |
568 | #ifdef APOLLO | |
569 | /* // at start of filename is meaningful on Apollo system */ | |
570 | && nm != p | |
571 | #endif /* APOLLO */ | |
572 | ) | |
573 | nm = p + 1; | |
574 | if (p[0] == '/' && p[1] == '~') | |
575 | nm = p + 1, lose = 1; | |
576 | if (p[0] == '/' && p[1] == '.' | |
577 | && (p[2] == '/' || p[2] == 0 | |
578 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
579 | lose = 1; | |
580 | #ifdef VMS | |
581 | if (p[0] == '\\') | |
582 | lose = 1; | |
583 | if (p[0] == '/') { | |
584 | /* if dev:[dir]/, move nm to / */ | |
585 | if (!slash && p > nm && (brack || colon)) { | |
586 | nm = (brack ? brack + 1 : colon + 1); | |
587 | lbrack = rbrack = 0; | |
588 | brack = 0; | |
589 | colon = 0; | |
590 | } | |
591 | slash = p; | |
592 | } | |
593 | if (p[0] == '-') | |
594 | #ifndef VMS4_4 | |
595 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
596 | if (lbrack == rbrack) | |
597 | { | |
598 | if (dots < 2) /* this is to allow negative version numbers */ | |
599 | p[0] = '_'; | |
600 | } | |
601 | else | |
602 | #endif /* VMS4_4 */ | |
603 | if (lbrack > rbrack && | |
604 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
605 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
606 | lose = 1; | |
607 | #ifndef VMS4_4 | |
608 | else | |
609 | p[0] = '_'; | |
610 | #endif /* VMS4_4 */ | |
611 | /* count open brackets, reset close bracket pointer */ | |
612 | if (p[0] == '[' || p[0] == '<') | |
613 | lbrack++, brack = 0; | |
614 | /* count close brackets, set close bracket pointer */ | |
615 | if (p[0] == ']' || p[0] == '>') | |
616 | rbrack++, brack = p; | |
617 | /* detect ][ or >< */ | |
618 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
619 | lose = 1; | |
620 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
621 | nm = p + 1, lose = 1; | |
622 | if (p[0] == ':' && (colon || slash)) | |
623 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
624 | if (brack) | |
625 | { | |
626 | nm = brack + 1; | |
627 | brack = 0; | |
628 | } | |
629 | /* if /pathname/dev:, move nm to dev: */ | |
630 | else if (slash) | |
631 | nm = slash + 1; | |
632 | /* if node::dev:, move colon following dev */ | |
633 | else if (colon && colon[-1] == ':') | |
634 | colon = p; | |
635 | /* if dev1:dev2:, move nm to dev2: */ | |
636 | else if (colon && colon[-1] != ':') | |
637 | { | |
638 | nm = colon + 1; | |
639 | colon = 0; | |
640 | } | |
641 | if (p[0] == ':' && !colon) | |
642 | { | |
643 | if (p[1] == ':') | |
644 | p++; | |
645 | colon = p; | |
646 | } | |
647 | if (lbrack == rbrack) | |
648 | if (p[0] == ';') | |
649 | dots = 2; | |
650 | else if (p[0] == '.') | |
651 | dots++; | |
652 | #endif /* VMS */ | |
653 | p++; | |
654 | } | |
655 | if (!lose) | |
656 | { | |
657 | #ifdef VMS | |
658 | if (index (nm, '/')) | |
659 | return build_string (sys_translate_unix (nm)); | |
660 | #endif /* VMS */ | |
661 | if (nm == XSTRING (name)->data) | |
662 | return name; | |
663 | return build_string (nm); | |
664 | } | |
665 | } | |
666 | ||
667 | /* Now determine directory to start with and put it in newdir */ | |
668 | ||
669 | newdir = 0; | |
670 | ||
671 | if (nm[0] == '~') /* prefix ~ */ | |
672 | if (nm[1] == '/' | |
673 | #ifdef VMS | |
674 | || nm[1] == ':' | |
675 | #endif /* VMS */ | |
e5d77022 | 676 | || nm[1] == 0)/* ~ by itself */ |
570d7624 JB |
677 | { |
678 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
679 | newdir = (unsigned char *) ""; | |
680 | nm++; | |
681 | #ifdef VMS | |
682 | nm++; /* Don't leave the slash in nm. */ | |
683 | #endif /* VMS */ | |
684 | } | |
685 | else /* ~user/filename */ | |
686 | { | |
687 | for (p = nm; *p && (*p != '/' | |
688 | #ifdef VMS | |
689 | && *p != ':' | |
690 | #endif /* VMS */ | |
691 | ); p++); | |
692 | o = (unsigned char *) alloca (p - nm + 1); | |
693 | bcopy ((char *) nm, o, p - nm); | |
694 | o [p - nm] = 0; | |
695 | ||
696 | pw = (struct passwd *) getpwnam (o + 1); | |
e5d77022 JB |
697 | if (pw) |
698 | { | |
699 | newdir = (unsigned char *) pw -> pw_dir; | |
570d7624 | 700 | #ifdef VMS |
e5d77022 | 701 | nm = p + 1; /* skip the terminator */ |
570d7624 | 702 | #else |
e5d77022 | 703 | nm = p; |
570d7624 | 704 | #endif /* VMS */ |
e5d77022 JB |
705 | } |
706 | ||
707 | /* If we don't find a user of that name, leave the name | |
708 | unchanged; don't move nm forward to p. */ | |
570d7624 JB |
709 | } |
710 | ||
711 | if (nm[0] != '/' | |
712 | #ifdef VMS | |
713 | && !index (nm, ':') | |
714 | #endif /* not VMS */ | |
715 | && !newdir) | |
716 | { | |
265a9e55 | 717 | if (NILP (defalt)) |
570d7624 JB |
718 | defalt = current_buffer->directory; |
719 | CHECK_STRING (defalt, 1); | |
720 | newdir = XSTRING (defalt)->data; | |
721 | } | |
722 | ||
bfb61299 JB |
723 | if (newdir != 0) |
724 | { | |
725 | /* Get rid of any slash at the end of newdir. */ | |
726 | int length = strlen (newdir); | |
727 | if (newdir[length - 1] == '/') | |
728 | { | |
729 | unsigned char *temp = (unsigned char *) alloca (length); | |
730 | bcopy (newdir, temp, length - 1); | |
731 | temp[length - 1] = 0; | |
732 | newdir = temp; | |
733 | } | |
734 | tlen = length + 1; | |
735 | } | |
736 | else | |
737 | tlen = 0; | |
570d7624 | 738 | |
bfb61299 JB |
739 | /* Now concatenate the directory and name to new space in the stack frame */ |
740 | tlen += strlen (nm) + 1; | |
570d7624 JB |
741 | target = (unsigned char *) alloca (tlen); |
742 | *target = 0; | |
743 | ||
744 | if (newdir) | |
745 | { | |
746 | #ifndef VMS | |
747 | if (nm[0] == 0 || nm[0] == '/') | |
748 | strcpy (target, newdir); | |
749 | else | |
750 | #endif | |
751 | file_name_as_directory (target, newdir); | |
752 | } | |
753 | ||
754 | strcat (target, nm); | |
755 | #ifdef VMS | |
756 | if (index (target, '/')) | |
757 | strcpy (target, sys_translate_unix (target)); | |
758 | #endif /* VMS */ | |
759 | ||
760 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
761 | ||
762 | p = target; | |
763 | o = target; | |
764 | ||
765 | while (*p) | |
766 | { | |
767 | #ifdef VMS | |
768 | if (*p != ']' && *p != '>' && *p != '-') | |
769 | { | |
770 | if (*p == '\\') | |
771 | p++; | |
772 | *o++ = *p++; | |
773 | } | |
774 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
775 | /* brackets are offset from each other by 2 */ | |
776 | { | |
777 | p += 2; | |
778 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
779 | /* convert [foo][bar] to [bar] */ | |
780 | while (o[-1] != '[' && o[-1] != '<') | |
781 | o--; | |
782 | else if (*p == '-' && *o != '.') | |
783 | *--p = '.'; | |
784 | } | |
785 | else if (p[0] == '-' && o[-1] == '.' && | |
786 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
787 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
788 | { | |
789 | do | |
790 | o--; | |
791 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
792 | if (p[1] == '.') /* foo.-.bar ==> bar*/ | |
793 | p += 2; | |
794 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
795 | p++, o--; | |
796 | /* else [foo.-] ==> [-] */ | |
797 | } | |
798 | else | |
799 | { | |
800 | #ifndef VMS4_4 | |
801 | if (*p == '-' && | |
802 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
803 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
804 | *p = '_'; | |
805 | #endif /* VMS4_4 */ | |
806 | *o++ = *p++; | |
807 | } | |
808 | #else /* not VMS */ | |
809 | if (*p != '/') | |
810 | { | |
811 | *o++ = *p++; | |
812 | } | |
813 | else if (!strncmp (p, "//", 2) | |
814 | #ifdef APOLLO | |
815 | /* // at start of filename is meaningful in Apollo system */ | |
816 | && o != target | |
817 | #endif /* APOLLO */ | |
818 | ) | |
819 | { | |
820 | o = target; | |
821 | p++; | |
822 | } | |
823 | else if (p[0] == '/' && p[1] == '.' && | |
824 | (p[2] == '/' || p[2] == 0)) | |
825 | p += 2; | |
826 | else if (!strncmp (p, "/..", 3) | |
827 | /* `/../' is the "superroot" on certain file systems. */ | |
828 | && o != target | |
829 | && (p[3] == '/' || p[3] == 0)) | |
830 | { | |
831 | while (o != target && *--o != '/') | |
832 | ; | |
833 | #ifdef APOLLO | |
834 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') | |
835 | ++o; | |
836 | else | |
837 | #endif /* APOLLO */ | |
838 | if (o == target && *o == '/') | |
839 | ++o; | |
840 | p += 3; | |
841 | } | |
842 | else | |
843 | { | |
844 | *o++ = *p++; | |
845 | } | |
846 | #endif /* not VMS */ | |
847 | } | |
848 | ||
849 | return make_string (target, o - target); | |
850 | } | |
851 | #if 0 | |
e5d77022 JB |
852 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. |
853 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, | |
570d7624 JB |
854 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
855 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ | |
856 | (does not start with slash); if DEFAULT is nil or missing,\n\ | |
857 | the current buffer's value of default-directory is used.\n\ | |
858 | Filenames containing `.' or `..' as components are simplified;\n\ | |
859 | initial `~/' expands to your home directory.\n\ | |
860 | See also the function `substitute-in-file-name'.") | |
861 | (name, defalt) | |
862 | Lisp_Object name, defalt; | |
863 | { | |
864 | unsigned char *nm; | |
865 | ||
866 | register unsigned char *newdir, *p, *o; | |
867 | int tlen; | |
868 | unsigned char *target; | |
869 | struct passwd *pw; | |
870 | int lose; | |
871 | #ifdef VMS | |
872 | unsigned char * colon = 0; | |
873 | unsigned char * close = 0; | |
874 | unsigned char * slash = 0; | |
875 | unsigned char * brack = 0; | |
876 | int lbrack = 0, rbrack = 0; | |
877 | int dots = 0; | |
878 | #endif /* VMS */ | |
879 | ||
880 | CHECK_STRING (name, 0); | |
881 | ||
882 | #ifdef VMS | |
883 | /* Filenames on VMS are always upper case. */ | |
884 | name = Fupcase (name); | |
885 | #endif | |
886 | ||
887 | nm = XSTRING (name)->data; | |
888 | ||
889 | /* If nm is absolute, flush ...// and detect /./ and /../. | |
890 | If no /./ or /../ we can return right away. */ | |
891 | if ( | |
892 | nm[0] == '/' | |
893 | #ifdef VMS | |
894 | || index (nm, ':') | |
895 | #endif /* VMS */ | |
896 | ) | |
897 | { | |
898 | p = nm; | |
899 | lose = 0; | |
900 | while (*p) | |
901 | { | |
902 | if (p[0] == '/' && p[1] == '/' | |
903 | #ifdef APOLLO | |
904 | /* // at start of filename is meaningful on Apollo system */ | |
905 | && nm != p | |
906 | #endif /* APOLLO */ | |
907 | ) | |
908 | nm = p + 1; | |
909 | if (p[0] == '/' && p[1] == '~') | |
910 | nm = p + 1, lose = 1; | |
911 | if (p[0] == '/' && p[1] == '.' | |
912 | && (p[2] == '/' || p[2] == 0 | |
913 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) | |
914 | lose = 1; | |
915 | #ifdef VMS | |
916 | if (p[0] == '\\') | |
917 | lose = 1; | |
918 | if (p[0] == '/') { | |
919 | /* if dev:[dir]/, move nm to / */ | |
920 | if (!slash && p > nm && (brack || colon)) { | |
921 | nm = (brack ? brack + 1 : colon + 1); | |
922 | lbrack = rbrack = 0; | |
923 | brack = 0; | |
924 | colon = 0; | |
925 | } | |
926 | slash = p; | |
927 | } | |
928 | if (p[0] == '-') | |
929 | #ifndef VMS4_4 | |
930 | /* VMS pre V4.4,convert '-'s in filenames. */ | |
931 | if (lbrack == rbrack) | |
932 | { | |
933 | if (dots < 2) /* this is to allow negative version numbers */ | |
934 | p[0] = '_'; | |
935 | } | |
936 | else | |
937 | #endif /* VMS4_4 */ | |
938 | if (lbrack > rbrack && | |
939 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && | |
940 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) | |
941 | lose = 1; | |
942 | #ifndef VMS4_4 | |
943 | else | |
944 | p[0] = '_'; | |
945 | #endif /* VMS4_4 */ | |
946 | /* count open brackets, reset close bracket pointer */ | |
947 | if (p[0] == '[' || p[0] == '<') | |
948 | lbrack++, brack = 0; | |
949 | /* count close brackets, set close bracket pointer */ | |
950 | if (p[0] == ']' || p[0] == '>') | |
951 | rbrack++, brack = p; | |
952 | /* detect ][ or >< */ | |
953 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) | |
954 | lose = 1; | |
955 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') | |
956 | nm = p + 1, lose = 1; | |
957 | if (p[0] == ':' && (colon || slash)) | |
958 | /* if dev1:[dir]dev2:, move nm to dev2: */ | |
959 | if (brack) | |
960 | { | |
961 | nm = brack + 1; | |
962 | brack = 0; | |
963 | } | |
964 | /* if /pathname/dev:, move nm to dev: */ | |
965 | else if (slash) | |
966 | nm = slash + 1; | |
967 | /* if node::dev:, move colon following dev */ | |
968 | else if (colon && colon[-1] == ':') | |
969 | colon = p; | |
970 | /* if dev1:dev2:, move nm to dev2: */ | |
971 | else if (colon && colon[-1] != ':') | |
972 | { | |
973 | nm = colon + 1; | |
974 | colon = 0; | |
975 | } | |
976 | if (p[0] == ':' && !colon) | |
977 | { | |
978 | if (p[1] == ':') | |
979 | p++; | |
980 | colon = p; | |
981 | } | |
982 | if (lbrack == rbrack) | |
983 | if (p[0] == ';') | |
984 | dots = 2; | |
985 | else if (p[0] == '.') | |
986 | dots++; | |
987 | #endif /* VMS */ | |
988 | p++; | |
989 | } | |
990 | if (!lose) | |
991 | { | |
992 | #ifdef VMS | |
993 | if (index (nm, '/')) | |
994 | return build_string (sys_translate_unix (nm)); | |
995 | #endif /* VMS */ | |
996 | if (nm == XSTRING (name)->data) | |
997 | return name; | |
998 | return build_string (nm); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | /* Now determine directory to start with and put it in NEWDIR */ | |
1003 | ||
1004 | newdir = 0; | |
1005 | ||
1006 | if (nm[0] == '~') /* prefix ~ */ | |
1007 | if (nm[1] == '/' | |
1008 | #ifdef VMS | |
1009 | || nm[1] == ':' | |
1010 | #endif /* VMS */ | |
1011 | || nm[1] == 0)/* ~/filename */ | |
1012 | { | |
1013 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) | |
1014 | newdir = (unsigned char *) ""; | |
1015 | nm++; | |
1016 | #ifdef VMS | |
1017 | nm++; /* Don't leave the slash in nm. */ | |
1018 | #endif /* VMS */ | |
1019 | } | |
1020 | else /* ~user/filename */ | |
1021 | { | |
1022 | /* Get past ~ to user */ | |
1023 | unsigned char *user = nm + 1; | |
1024 | /* Find end of name. */ | |
1025 | unsigned char *ptr = (unsigned char *) index (user, '/'); | |
1026 | int len = ptr ? ptr - user : strlen (user); | |
1027 | #ifdef VMS | |
1028 | unsigned char *ptr1 = index (user, ':'); | |
1029 | if (ptr1 != 0 && ptr1 - user < len) | |
1030 | len = ptr1 - user; | |
1031 | #endif /* VMS */ | |
1032 | /* Copy the user name into temp storage. */ | |
1033 | o = (unsigned char *) alloca (len + 1); | |
1034 | bcopy ((char *) user, o, len); | |
1035 | o[len] = 0; | |
1036 | ||
1037 | /* Look up the user name. */ | |
1038 | pw = (struct passwd *) getpwnam (o + 1); | |
1039 | if (!pw) | |
1040 | error ("\"%s\" isn't a registered user", o + 1); | |
1041 | ||
1042 | newdir = (unsigned char *) pw->pw_dir; | |
1043 | ||
1044 | /* Discard the user name from NM. */ | |
1045 | nm += len; | |
1046 | } | |
1047 | ||
1048 | if (nm[0] != '/' | |
1049 | #ifdef VMS | |
1050 | && !index (nm, ':') | |
1051 | #endif /* not VMS */ | |
1052 | && !newdir) | |
1053 | { | |
265a9e55 | 1054 | if (NILP (defalt)) |
570d7624 JB |
1055 | defalt = current_buffer->directory; |
1056 | CHECK_STRING (defalt, 1); | |
1057 | newdir = XSTRING (defalt)->data; | |
1058 | } | |
1059 | ||
1060 | /* Now concatenate the directory and name to new space in the stack frame */ | |
1061 | ||
1062 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; | |
1063 | target = (unsigned char *) alloca (tlen); | |
1064 | *target = 0; | |
1065 | ||
1066 | if (newdir) | |
1067 | { | |
1068 | #ifndef VMS | |
1069 | if (nm[0] == 0 || nm[0] == '/') | |
1070 | strcpy (target, newdir); | |
1071 | else | |
1072 | #endif | |
1073 | file_name_as_directory (target, newdir); | |
1074 | } | |
1075 | ||
1076 | strcat (target, nm); | |
1077 | #ifdef VMS | |
1078 | if (index (target, '/')) | |
1079 | strcpy (target, sys_translate_unix (target)); | |
1080 | #endif /* VMS */ | |
1081 | ||
1082 | /* Now canonicalize by removing /. and /foo/.. if they appear */ | |
1083 | ||
1084 | p = target; | |
1085 | o = target; | |
1086 | ||
1087 | while (*p) | |
1088 | { | |
1089 | #ifdef VMS | |
1090 | if (*p != ']' && *p != '>' && *p != '-') | |
1091 | { | |
1092 | if (*p == '\\') | |
1093 | p++; | |
1094 | *o++ = *p++; | |
1095 | } | |
1096 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) | |
1097 | /* brackets are offset from each other by 2 */ | |
1098 | { | |
1099 | p += 2; | |
1100 | if (*p != '.' && *p != '-' && o[-1] != '.') | |
1101 | /* convert [foo][bar] to [bar] */ | |
1102 | while (o[-1] != '[' && o[-1] != '<') | |
1103 | o--; | |
1104 | else if (*p == '-' && *o != '.') | |
1105 | *--p = '.'; | |
1106 | } | |
1107 | else if (p[0] == '-' && o[-1] == '.' && | |
1108 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) | |
1109 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ | |
1110 | { | |
1111 | do | |
1112 | o--; | |
1113 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); | |
1114 | if (p[1] == '.') /* foo.-.bar ==> bar*/ | |
1115 | p += 2; | |
1116 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ | |
1117 | p++, o--; | |
1118 | /* else [foo.-] ==> [-] */ | |
1119 | } | |
1120 | else | |
1121 | { | |
1122 | #ifndef VMS4_4 | |
1123 | if (*p == '-' && | |
1124 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && | |
1125 | p[1] != ']' && p[1] != '>' && p[1] != '.') | |
1126 | *p = '_'; | |
1127 | #endif /* VMS4_4 */ | |
1128 | *o++ = *p++; | |
1129 | } | |
1130 | #else /* not VMS */ | |
1131 | if (*p != '/') | |
1132 | { | |
1133 | *o++ = *p++; | |
1134 | } | |
1135 | else if (!strncmp (p, "//", 2) | |
1136 | #ifdef APOLLO | |
1137 | /* // at start of filename is meaningful in Apollo system */ | |
1138 | && o != target | |
1139 | #endif /* APOLLO */ | |
1140 | ) | |
1141 | { | |
1142 | o = target; | |
1143 | p++; | |
1144 | } | |
1145 | else if (p[0] == '/' && p[1] == '.' && | |
1146 | (p[2] == '/' || p[2] == 0)) | |
1147 | p += 2; | |
1148 | else if (!strncmp (p, "/..", 3) | |
1149 | /* `/../' is the "superroot" on certain file systems. */ | |
1150 | && o != target | |
1151 | && (p[3] == '/' || p[3] == 0)) | |
1152 | { | |
1153 | while (o != target && *--o != '/') | |
1154 | ; | |
1155 | #ifdef APOLLO | |
1156 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') | |
1157 | ++o; | |
1158 | else | |
1159 | #endif /* APOLLO */ | |
1160 | if (o == target && *o == '/') | |
1161 | ++o; | |
1162 | p += 3; | |
1163 | } | |
1164 | else | |
1165 | { | |
1166 | *o++ = *p++; | |
1167 | } | |
1168 | #endif /* not VMS */ | |
1169 | } | |
1170 | ||
1171 | return make_string (target, o - target); | |
1172 | } | |
1173 | #endif | |
1174 | \f | |
1175 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, | |
1176 | Ssubstitute_in_file_name, 1, 1, 0, | |
1177 | "Substitute environment variables referred to in FILENAME.\n\ | |
1178 | `$FOO' where FOO is an environment variable name means to substitute\n\ | |
1179 | the value of that variable. The variable name should be terminated\n\ | |
1180 | with a character not a letter, digit or underscore; otherwise, enclose\n\ | |
1181 | the entire variable name in braces.\n\ | |
1182 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ | |
1183 | On VMS, `$' substitution is not done; this function does little and only\n\ | |
1184 | duplicates what `expand-file-name' does.") | |
1185 | (string) | |
1186 | Lisp_Object string; | |
1187 | { | |
1188 | unsigned char *nm; | |
1189 | ||
1190 | register unsigned char *s, *p, *o, *x, *endp; | |
1191 | unsigned char *target; | |
1192 | int total = 0; | |
1193 | int substituted = 0; | |
1194 | unsigned char *xnm; | |
1195 | ||
1196 | CHECK_STRING (string, 0); | |
1197 | ||
1198 | nm = XSTRING (string)->data; | |
1199 | endp = nm + XSTRING (string)->size; | |
1200 | ||
1201 | /* If /~ or // appears, discard everything through first slash. */ | |
1202 | ||
1203 | for (p = nm; p != endp; p++) | |
1204 | { | |
1205 | if ((p[0] == '~' || | |
1206 | #ifdef APOLLO | |
1207 | /* // at start of file name is meaningful in Apollo system */ | |
1208 | (p[0] == '/' && p - 1 != nm) | |
1209 | #else /* not APOLLO */ | |
1210 | p[0] == '/' | |
1211 | #endif /* not APOLLO */ | |
1212 | ) | |
1213 | && p != nm && | |
1214 | #ifdef VMS | |
1215 | (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' || | |
1216 | #endif /* VMS */ | |
1217 | p[-1] == '/') | |
1218 | #ifdef VMS | |
1219 | ) | |
1220 | #endif /* VMS */ | |
1221 | { | |
1222 | nm = p; | |
1223 | substituted = 1; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | #ifdef VMS | |
1228 | return build_string (nm); | |
1229 | #else | |
1230 | ||
1231 | /* See if any variables are substituted into the string | |
1232 | and find the total length of their values in `total' */ | |
1233 | ||
1234 | for (p = nm; p != endp;) | |
1235 | if (*p != '$') | |
1236 | p++; | |
1237 | else | |
1238 | { | |
1239 | p++; | |
1240 | if (p == endp) | |
1241 | goto badsubst; | |
1242 | else if (*p == '$') | |
1243 | { | |
1244 | /* "$$" means a single "$" */ | |
1245 | p++; | |
1246 | total -= 1; | |
1247 | substituted = 1; | |
1248 | continue; | |
1249 | } | |
1250 | else if (*p == '{') | |
1251 | { | |
1252 | o = ++p; | |
1253 | while (p != endp && *p != '}') p++; | |
1254 | if (*p != '}') goto missingclose; | |
1255 | s = p; | |
1256 | } | |
1257 | else | |
1258 | { | |
1259 | o = p; | |
1260 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1261 | s = p; | |
1262 | } | |
1263 | ||
1264 | /* Copy out the variable name */ | |
1265 | target = (unsigned char *) alloca (s - o + 1); | |
1266 | strncpy (target, o, s - o); | |
1267 | target[s - o] = 0; | |
1268 | ||
1269 | /* Get variable value */ | |
1270 | o = (unsigned char *) egetenv (target); | |
1271 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ | |
1272 | #if 0 | |
1273 | #ifdef USG | |
1274 | if (!o && !strcmp (target, "USER")) | |
1275 | o = egetenv ("LOGNAME"); | |
1276 | #endif /* USG */ | |
1277 | #endif /* 0 */ | |
1278 | if (!o) goto badvar; | |
1279 | total += strlen (o); | |
1280 | substituted = 1; | |
1281 | } | |
1282 | ||
1283 | if (!substituted) | |
1284 | return string; | |
1285 | ||
1286 | /* If substitution required, recopy the string and do it */ | |
1287 | /* Make space in stack frame for the new copy */ | |
1288 | xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1); | |
1289 | x = xnm; | |
1290 | ||
1291 | /* Copy the rest of the name through, replacing $ constructs with values */ | |
1292 | for (p = nm; *p;) | |
1293 | if (*p != '$') | |
1294 | *x++ = *p++; | |
1295 | else | |
1296 | { | |
1297 | p++; | |
1298 | if (p == endp) | |
1299 | goto badsubst; | |
1300 | else if (*p == '$') | |
1301 | { | |
1302 | *x++ = *p++; | |
1303 | continue; | |
1304 | } | |
1305 | else if (*p == '{') | |
1306 | { | |
1307 | o = ++p; | |
1308 | while (p != endp && *p != '}') p++; | |
1309 | if (*p != '}') goto missingclose; | |
1310 | s = p++; | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | o = p; | |
1315 | while (p != endp && (isalnum (*p) || *p == '_')) p++; | |
1316 | s = p; | |
1317 | } | |
1318 | ||
1319 | /* Copy out the variable name */ | |
1320 | target = (unsigned char *) alloca (s - o + 1); | |
1321 | strncpy (target, o, s - o); | |
1322 | target[s - o] = 0; | |
1323 | ||
1324 | /* Get variable value */ | |
1325 | o = (unsigned char *) egetenv (target); | |
1326 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ | |
1327 | #if 0 | |
1328 | #ifdef USG | |
1329 | if (!o && !strcmp (target, "USER")) | |
1330 | o = egetenv ("LOGNAME"); | |
1331 | #endif /* USG */ | |
1332 | #endif /* 0 */ | |
1333 | if (!o) | |
1334 | goto badvar; | |
1335 | ||
1336 | strcpy (x, o); | |
1337 | x += strlen (o); | |
1338 | } | |
1339 | ||
1340 | *x = 0; | |
1341 | ||
1342 | /* If /~ or // appears, discard everything through first slash. */ | |
1343 | ||
1344 | for (p = xnm; p != x; p++) | |
1345 | if ((p[0] == '~' || | |
1346 | #ifdef APOLLO | |
1347 | /* // at start of file name is meaningful in Apollo system */ | |
1348 | (p[0] == '/' && p - 1 != xnm) | |
1349 | #else /* not APOLLO */ | |
1350 | p[0] == '/' | |
1351 | #endif /* not APOLLO */ | |
1352 | ) | |
1353 | && p != nm && p[-1] == '/') | |
1354 | xnm = p; | |
1355 | ||
1356 | return make_string (xnm, x - xnm); | |
1357 | ||
1358 | badsubst: | |
1359 | error ("Bad format environment-variable substitution"); | |
1360 | missingclose: | |
1361 | error ("Missing \"}\" in environment-variable substitution"); | |
1362 | badvar: | |
1363 | error ("Substituting nonexistent environment variable \"%s\"", target); | |
1364 | ||
1365 | /* NOTREACHED */ | |
1366 | #endif /* not VMS */ | |
1367 | } | |
1368 | \f | |
067ffa38 JB |
1369 | /* A slightly faster and more convenient way to get |
1370 | (directory-file-name (expand-file-name FOO)). The return value may | |
1371 | have had its last character zapped with a '\0' character, meaning | |
1372 | that it is acceptable to system calls, but not to other lisp | |
1373 | functions. Callers should make sure that the return value doesn't | |
1374 | escape. */ | |
1375 | ||
570d7624 JB |
1376 | Lisp_Object |
1377 | expand_and_dir_to_file (filename, defdir) | |
1378 | Lisp_Object filename, defdir; | |
1379 | { | |
1380 | register Lisp_Object abspath; | |
1381 | ||
1382 | abspath = Fexpand_file_name (filename, defdir); | |
1383 | #ifdef VMS | |
1384 | { | |
1385 | register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1]; | |
1386 | if (c == ':' || c == ']' || c == '>') | |
1387 | abspath = Fdirectory_file_name (abspath); | |
1388 | } | |
1389 | #else | |
1390 | /* Remove final slash, if any (unless path is root). | |
1391 | stat behaves differently depending! */ | |
1392 | if (XSTRING (abspath)->size > 1 | |
1393 | && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/') | |
1394 | { | |
1395 | if (EQ (abspath, filename)) | |
1396 | abspath = Fcopy_sequence (abspath); | |
1397 | XSTRING (abspath)->data[XSTRING (abspath)->size - 1] = 0; | |
1398 | } | |
1399 | #endif | |
1400 | return abspath; | |
1401 | } | |
1402 | \f | |
1403 | barf_or_query_if_file_exists (absname, querystring, interactive) | |
1404 | Lisp_Object absname; | |
1405 | unsigned char *querystring; | |
1406 | int interactive; | |
1407 | { | |
1408 | register Lisp_Object tem; | |
1409 | struct gcpro gcpro1; | |
1410 | ||
1411 | if (access (XSTRING (absname)->data, 4) >= 0) | |
1412 | { | |
1413 | if (! interactive) | |
1414 | Fsignal (Qfile_already_exists, | |
1415 | Fcons (build_string ("File already exists"), | |
1416 | Fcons (absname, Qnil))); | |
1417 | GCPRO1 (absname); | |
1418 | tem = do_yes_or_no_p (format1 ("File %s already exists; %s anyway? ", | |
1419 | XSTRING (absname)->data, querystring)); | |
1420 | UNGCPRO; | |
265a9e55 | 1421 | if (NILP (tem)) |
570d7624 JB |
1422 | Fsignal (Qfile_already_exists, |
1423 | Fcons (build_string ("File already exists"), | |
1424 | Fcons (absname, Qnil))); | |
1425 | } | |
1426 | return; | |
1427 | } | |
1428 | ||
1429 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, | |
349a7710 | 1430 | "fCopy file: \nFCopy %s to file: \np\nP", |
570d7624 JB |
1431 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
1432 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ | |
1433 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ | |
1434 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1435 | This is what happens in interactive use with M-x.\n\ | |
349a7710 JB |
1436 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
1437 | last-modified time as the old one. (This works on only some systems.)\n\ | |
1438 | A prefix arg makes KEEP-TIME non-nil.") | |
570d7624 JB |
1439 | (filename, newname, ok_if_already_exists, keep_date) |
1440 | Lisp_Object filename, newname, ok_if_already_exists, keep_date; | |
1441 | { | |
1442 | int ifd, ofd, n; | |
1443 | char buf[16 * 1024]; | |
1444 | struct stat st; | |
32f4334d | 1445 | Lisp_Object handler; |
570d7624 | 1446 | struct gcpro gcpro1, gcpro2; |
b5148e85 | 1447 | int count = specpdl_ptr - specpdl; |
570d7624 JB |
1448 | |
1449 | GCPRO2 (filename, newname); | |
1450 | CHECK_STRING (filename, 0); | |
1451 | CHECK_STRING (newname, 1); | |
1452 | filename = Fexpand_file_name (filename, Qnil); | |
1453 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
1454 | |
1455 | /* If the file name has special constructs in it, | |
1456 | call the corresponding file handler. */ | |
1457 | handler = find_file_handler (filename); | |
1458 | if (!NILP (handler)) | |
1459 | return call3 (handler, Qcopy_file, filename, newname); | |
1460 | ||
265a9e55 | 1461 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1462 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1463 | barf_or_query_if_file_exists (newname, "copy to it", | |
1464 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1465 | ||
1466 | ifd = open (XSTRING (filename)->data, 0); | |
1467 | if (ifd < 0) | |
1468 | report_file_error ("Opening input file", Fcons (filename, Qnil)); | |
1469 | ||
b5148e85 RS |
1470 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
1471 | ||
570d7624 JB |
1472 | #ifdef VMS |
1473 | /* Create the copy file with the same record format as the input file */ | |
1474 | ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); | |
1475 | #else | |
1476 | ofd = creat (XSTRING (newname)->data, 0666); | |
1477 | #endif /* VMS */ | |
1478 | if (ofd < 0) | |
66331187 | 1479 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
b5148e85 RS |
1480 | |
1481 | record_unwind_protect (close_file_unwind, make_number (ofd)); | |
570d7624 | 1482 | |
b5148e85 RS |
1483 | immediate_quit = 1; |
1484 | QUIT; | |
570d7624 JB |
1485 | while ((n = read (ifd, buf, sizeof buf)) > 0) |
1486 | if (write (ofd, buf, n) != n) | |
66331187 | 1487 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
b5148e85 | 1488 | immediate_quit = 0; |
570d7624 JB |
1489 | |
1490 | if (fstat (ifd, &st) >= 0) | |
1491 | { | |
265a9e55 | 1492 | if (!NILP (keep_date)) |
570d7624 | 1493 | { |
de5bf5d3 JB |
1494 | EMACS_TIME atime, mtime; |
1495 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); | |
1496 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); | |
1497 | EMACS_SET_UTIMES (XSTRING (newname)->data, atime, mtime); | |
570d7624 | 1498 | } |
570d7624 JB |
1499 | #ifdef APOLLO |
1500 | if (!egetenv ("USE_DOMAIN_ACLS")) | |
1501 | #endif | |
de5bf5d3 | 1502 | chmod (XSTRING (newname)->data, st.st_mode & 07777); |
570d7624 JB |
1503 | } |
1504 | ||
b5148e85 RS |
1505 | /* Discard the unwind protects. */ |
1506 | specpdl_ptr = specpdl + count; | |
1507 | ||
570d7624 JB |
1508 | close (ifd); |
1509 | if (close (ofd) < 0) | |
1510 | report_file_error ("I/O error", Fcons (newname, Qnil)); | |
1511 | ||
1512 | UNGCPRO; | |
1513 | return Qnil; | |
1514 | } | |
1515 | ||
1516 | DEFUN ("make-directory", Fmake_directory, Smake_directory, 1, 1, "FMake directory: ", | |
1517 | "Create a directory. One argument, a file name string.") | |
1518 | (dirname) | |
1519 | Lisp_Object dirname; | |
1520 | { | |
1521 | unsigned char *dir; | |
32f4334d | 1522 | Lisp_Object handler; |
570d7624 JB |
1523 | |
1524 | CHECK_STRING (dirname, 0); | |
1525 | dirname = Fexpand_file_name (dirname, Qnil); | |
32f4334d RS |
1526 | |
1527 | handler = find_file_handler (dirname); | |
1528 | if (!NILP (handler)) | |
1529 | return call2 (handler, Qmake_directory, dirname); | |
1530 | ||
570d7624 JB |
1531 | dir = XSTRING (dirname)->data; |
1532 | ||
1533 | if (mkdir (dir, 0777) != 0) | |
1534 | report_file_error ("Creating directory", Flist (1, &dirname)); | |
1535 | ||
32f4334d | 1536 | return Qnil; |
570d7624 JB |
1537 | } |
1538 | ||
aa734e17 RS |
1539 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
1540 | "Delete a directory. One argument, a file name string.") | |
570d7624 JB |
1541 | (dirname) |
1542 | Lisp_Object dirname; | |
1543 | { | |
1544 | unsigned char *dir; | |
32f4334d | 1545 | Lisp_Object handler; |
570d7624 JB |
1546 | |
1547 | CHECK_STRING (dirname, 0); | |
1548 | dirname = Fexpand_file_name (dirname, Qnil); | |
1549 | dir = XSTRING (dirname)->data; | |
1550 | ||
32f4334d RS |
1551 | handler = find_file_handler (dirname); |
1552 | if (!NILP (handler)) | |
1553 | return call2 (handler, Qdelete_directory, dirname); | |
1554 | ||
570d7624 JB |
1555 | if (rmdir (dir) != 0) |
1556 | report_file_error ("Removing directory", Flist (1, &dirname)); | |
1557 | ||
1558 | return Qnil; | |
1559 | } | |
1560 | ||
1561 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", | |
1562 | "Delete specified file. One argument, a file name string.\n\ | |
1563 | If file has multiple names, it continues to exist with the other names.") | |
1564 | (filename) | |
1565 | Lisp_Object filename; | |
1566 | { | |
32f4334d | 1567 | Lisp_Object handler; |
570d7624 JB |
1568 | CHECK_STRING (filename, 0); |
1569 | filename = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
1570 | |
1571 | handler = find_file_handler (filename); | |
1572 | if (!NILP (handler)) | |
1573 | return call2 (handler, Qdelete_file, filename); | |
1574 | ||
570d7624 JB |
1575 | if (0 > unlink (XSTRING (filename)->data)) |
1576 | report_file_error ("Removing old name", Flist (1, &filename)); | |
1577 | return Qnil; | |
1578 | } | |
1579 | ||
1580 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, | |
1581 | "fRename file: \nFRename %s to file: \np", | |
1582 | "Rename FILE as NEWNAME. Both args strings.\n\ | |
1583 | If file has names other than FILE, it continues to have those names.\n\ | |
1584 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
1585 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
1586 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1587 | This is what happens in interactive use with M-x.") | |
1588 | (filename, newname, ok_if_already_exists) | |
1589 | Lisp_Object filename, newname, ok_if_already_exists; | |
1590 | { | |
1591 | #ifdef NO_ARG_ARRAY | |
1592 | Lisp_Object args[2]; | |
1593 | #endif | |
32f4334d | 1594 | Lisp_Object handler; |
570d7624 JB |
1595 | struct gcpro gcpro1, gcpro2; |
1596 | ||
1597 | GCPRO2 (filename, newname); | |
1598 | CHECK_STRING (filename, 0); | |
1599 | CHECK_STRING (newname, 1); | |
1600 | filename = Fexpand_file_name (filename, Qnil); | |
1601 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
1602 | |
1603 | /* If the file name has special constructs in it, | |
1604 | call the corresponding file handler. */ | |
1605 | handler = find_file_handler (filename); | |
1606 | if (!NILP (handler)) | |
1607 | return call3 (handler, Qrename_file, filename, newname); | |
1608 | ||
265a9e55 | 1609 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1610 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1611 | barf_or_query_if_file_exists (newname, "rename to it", | |
1612 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1613 | #ifndef BSD4_1 | |
1614 | if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data)) | |
1615 | #else | |
1616 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data) | |
1617 | || 0 > unlink (XSTRING (filename)->data)) | |
1618 | #endif | |
1619 | { | |
1620 | if (errno == EXDEV) | |
1621 | { | |
1622 | Fcopy_file (filename, newname, ok_if_already_exists, Qt); | |
1623 | Fdelete_file (filename); | |
1624 | } | |
1625 | else | |
1626 | #ifdef NO_ARG_ARRAY | |
1627 | { | |
1628 | args[0] = filename; | |
1629 | args[1] = newname; | |
1630 | report_file_error ("Renaming", Flist (2, args)); | |
1631 | } | |
1632 | #else | |
1633 | report_file_error ("Renaming", Flist (2, &filename)); | |
1634 | #endif | |
1635 | } | |
1636 | UNGCPRO; | |
1637 | return Qnil; | |
1638 | } | |
1639 | ||
1640 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, | |
1641 | "fAdd name to file: \nFName to add to %s: \np", | |
1642 | "Give FILE additional name NEWNAME. Both args strings.\n\ | |
1643 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
1644 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
1645 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1646 | This is what happens in interactive use with M-x.") | |
1647 | (filename, newname, ok_if_already_exists) | |
1648 | Lisp_Object filename, newname, ok_if_already_exists; | |
1649 | { | |
1650 | #ifdef NO_ARG_ARRAY | |
1651 | Lisp_Object args[2]; | |
1652 | #endif | |
32f4334d | 1653 | Lisp_Object handler; |
570d7624 JB |
1654 | struct gcpro gcpro1, gcpro2; |
1655 | ||
1656 | GCPRO2 (filename, newname); | |
1657 | CHECK_STRING (filename, 0); | |
1658 | CHECK_STRING (newname, 1); | |
1659 | filename = Fexpand_file_name (filename, Qnil); | |
1660 | newname = Fexpand_file_name (newname, Qnil); | |
32f4334d RS |
1661 | |
1662 | /* If the file name has special constructs in it, | |
1663 | call the corresponding file handler. */ | |
1664 | handler = find_file_handler (filename); | |
1665 | if (!NILP (handler)) | |
1666 | return call3 (handler, Qadd_name_to_file, filename, newname); | |
1667 | ||
265a9e55 | 1668 | if (NILP (ok_if_already_exists) |
570d7624 JB |
1669 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
1670 | barf_or_query_if_file_exists (newname, "make it a new name", | |
1671 | XTYPE (ok_if_already_exists) == Lisp_Int); | |
1672 | unlink (XSTRING (newname)->data); | |
1673 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)) | |
1674 | { | |
1675 | #ifdef NO_ARG_ARRAY | |
1676 | args[0] = filename; | |
1677 | args[1] = newname; | |
1678 | report_file_error ("Adding new name", Flist (2, args)); | |
1679 | #else | |
1680 | report_file_error ("Adding new name", Flist (2, &filename)); | |
1681 | #endif | |
1682 | } | |
1683 | ||
1684 | UNGCPRO; | |
1685 | return Qnil; | |
1686 | } | |
1687 | ||
1688 | #ifdef S_IFLNK | |
1689 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, | |
1690 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", | |
1691 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ | |
1692 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ | |
1693 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ | |
1694 | A number as third arg means request confirmation if NEWNAME already exists.\n\ | |
1695 | This happens for interactive use with M-x.") | |
e5d77022 JB |
1696 | (filename, linkname, ok_if_already_exists) |
1697 | Lisp_Object filename, linkname, ok_if_already_exists; | |
570d7624 JB |
1698 | { |
1699 | #ifdef NO_ARG_ARRAY | |
1700 | Lisp_Object args[2]; | |
1701 | #endif | |
32f4334d | 1702 | Lisp_Object handler; |
570d7624 JB |
1703 | struct gcpro gcpro1, gcpro2; |
1704 | ||
e5d77022 | 1705 | GCPRO2 (filename, linkname); |
570d7624 | 1706 | CHECK_STRING (filename, 0); |
e5d77022 | 1707 | CHECK_STRING (linkname, 1); |
570d7624 JB |
1708 | #if 0 /* This made it impossible to make a link to a relative name. */ |
1709 | filename = Fexpand_file_name (filename, Qnil); | |
1710 | #endif | |
e5d77022 | 1711 | linkname = Fexpand_file_name (linkname, Qnil); |
32f4334d RS |
1712 | |
1713 | /* If the file name has special constructs in it, | |
1714 | call the corresponding file handler. */ | |
1715 | handler = find_file_handler (filename); | |
1716 | if (!NILP (handler)) | |
3eac9910 | 1717 | return call3 (handler, Qmake_symbolic_link, filename, linkname); |
32f4334d | 1718 | |
265a9e55 | 1719 | if (NILP (ok_if_already_exists) |
570d7624 | 1720 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
e5d77022 | 1721 | barf_or_query_if_file_exists (linkname, "make it a link", |
570d7624 | 1722 | XTYPE (ok_if_already_exists) == Lisp_Int); |
e5d77022 | 1723 | if (0 > symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
570d7624 JB |
1724 | { |
1725 | /* If we didn't complain already, silently delete existing file. */ | |
1726 | if (errno == EEXIST) | |
1727 | { | |
1728 | unlink (XSTRING (filename)->data); | |
e5d77022 | 1729 | if (0 <= symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
570d7624 JB |
1730 | return Qnil; |
1731 | } | |
1732 | ||
1733 | #ifdef NO_ARG_ARRAY | |
1734 | args[0] = filename; | |
e5d77022 | 1735 | args[1] = linkname; |
570d7624 JB |
1736 | report_file_error ("Making symbolic link", Flist (2, args)); |
1737 | #else | |
1738 | report_file_error ("Making symbolic link", Flist (2, &filename)); | |
1739 | #endif | |
1740 | } | |
1741 | UNGCPRO; | |
1742 | return Qnil; | |
1743 | } | |
1744 | #endif /* S_IFLNK */ | |
1745 | ||
1746 | #ifdef VMS | |
1747 | ||
1748 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, | |
1749 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", | |
1750 | "Define the job-wide logical name NAME to have the value STRING.\n\ | |
1751 | If STRING is nil or a null string, the logical name NAME is deleted.") | |
1752 | (varname, string) | |
1753 | Lisp_Object varname; | |
1754 | Lisp_Object string; | |
1755 | { | |
1756 | CHECK_STRING (varname, 0); | |
265a9e55 | 1757 | if (NILP (string)) |
570d7624 JB |
1758 | delete_logical_name (XSTRING (varname)->data); |
1759 | else | |
1760 | { | |
1761 | CHECK_STRING (string, 1); | |
1762 | ||
1763 | if (XSTRING (string)->size == 0) | |
1764 | delete_logical_name (XSTRING (varname)->data); | |
1765 | else | |
1766 | define_logical_name (XSTRING (varname)->data, XSTRING (string)->data); | |
1767 | } | |
1768 | ||
1769 | return string; | |
1770 | } | |
1771 | #endif /* VMS */ | |
1772 | ||
1773 | #ifdef HPUX_NET | |
1774 | ||
1775 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, | |
1776 | "Open a network connection to PATH using LOGIN as the login string.") | |
1777 | (path, login) | |
1778 | Lisp_Object path, login; | |
1779 | { | |
1780 | int netresult; | |
1781 | ||
1782 | CHECK_STRING (path, 0); | |
1783 | CHECK_STRING (login, 0); | |
1784 | ||
1785 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); | |
1786 | ||
1787 | if (netresult == -1) | |
1788 | return Qnil; | |
1789 | else | |
1790 | return Qt; | |
1791 | } | |
1792 | #endif /* HPUX_NET */ | |
1793 | \f | |
1794 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, | |
1795 | 1, 1, 0, | |
1796 | "Return t if file FILENAME specifies an absolute path name.\n\ | |
1797 | On Unix, this is a name starting with a `/' or a `~'.") | |
1798 | (filename) | |
1799 | Lisp_Object filename; | |
1800 | { | |
1801 | unsigned char *ptr; | |
1802 | ||
1803 | CHECK_STRING (filename, 0); | |
1804 | ptr = XSTRING (filename)->data; | |
1805 | if (*ptr == '/' || *ptr == '~' | |
1806 | #ifdef VMS | |
1807 | /* ??? This criterion is probably wrong for '<'. */ | |
1808 | || index (ptr, ':') || index (ptr, '<') | |
1809 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) | |
1810 | && ptr[1] != '.') | |
1811 | #endif /* VMS */ | |
1812 | ) | |
1813 | return Qt; | |
1814 | else | |
1815 | return Qnil; | |
1816 | } | |
1817 | ||
1818 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, | |
1819 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ | |
1820 | See also `file-readable-p' and `file-attributes'.") | |
1821 | (filename) | |
1822 | Lisp_Object filename; | |
1823 | { | |
1824 | Lisp_Object abspath; | |
32f4334d | 1825 | Lisp_Object handler; |
570d7624 JB |
1826 | |
1827 | CHECK_STRING (filename, 0); | |
1828 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
1829 | |
1830 | /* If the file name has special constructs in it, | |
1831 | call the corresponding file handler. */ | |
1832 | handler = find_file_handler (filename); | |
1833 | if (!NILP (handler)) | |
1834 | return call2 (handler, Qfile_exists_p, filename); | |
1835 | ||
570d7624 JB |
1836 | return (access (XSTRING (abspath)->data, 0) >= 0) ? Qt : Qnil; |
1837 | } | |
1838 | ||
1839 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, | |
1840 | "Return t if FILENAME can be executed by you.\n\ | |
1841 | For directories this means you can change to that directory.") | |
1842 | (filename) | |
1843 | Lisp_Object filename; | |
1844 | ||
1845 | { | |
1846 | Lisp_Object abspath; | |
32f4334d | 1847 | Lisp_Object handler; |
570d7624 JB |
1848 | |
1849 | CHECK_STRING (filename, 0); | |
1850 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
1851 | |
1852 | /* If the file name has special constructs in it, | |
1853 | call the corresponding file handler. */ | |
1854 | handler = find_file_handler (filename); | |
1855 | if (!NILP (handler)) | |
1856 | return call2 (handler, Qfile_executable_p, filename); | |
1857 | ||
570d7624 JB |
1858 | return (access (XSTRING (abspath)->data, 1) >= 0) ? Qt : Qnil; |
1859 | } | |
1860 | ||
1861 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, | |
1862 | "Return t if file FILENAME exists and you can read it.\n\ | |
1863 | See also `file-exists-p' and `file-attributes'.") | |
1864 | (filename) | |
1865 | Lisp_Object filename; | |
1866 | { | |
1867 | Lisp_Object abspath; | |
32f4334d | 1868 | Lisp_Object handler; |
570d7624 JB |
1869 | |
1870 | CHECK_STRING (filename, 0); | |
1871 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
1872 | |
1873 | /* If the file name has special constructs in it, | |
1874 | call the corresponding file handler. */ | |
1875 | handler = find_file_handler (filename); | |
1876 | if (!NILP (handler)) | |
1877 | return call2 (handler, Qfile_readable_p, filename); | |
1878 | ||
570d7624 JB |
1879 | return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil; |
1880 | } | |
1881 | ||
1882 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, | |
1883 | "If file FILENAME is the name of a symbolic link\n\ | |
1884 | returns the name of the file to which it is linked.\n\ | |
1885 | Otherwise returns NIL.") | |
1886 | (filename) | |
1887 | Lisp_Object filename; | |
1888 | { | |
1889 | #ifdef S_IFLNK | |
1890 | char *buf; | |
1891 | int bufsize; | |
1892 | int valsize; | |
1893 | Lisp_Object val; | |
32f4334d | 1894 | Lisp_Object handler; |
570d7624 JB |
1895 | |
1896 | CHECK_STRING (filename, 0); | |
1897 | filename = Fexpand_file_name (filename, Qnil); | |
1898 | ||
32f4334d RS |
1899 | /* If the file name has special constructs in it, |
1900 | call the corresponding file handler. */ | |
1901 | handler = find_file_handler (filename); | |
1902 | if (!NILP (handler)) | |
1903 | return call2 (handler, Qfile_symlink_p, filename); | |
1904 | ||
570d7624 JB |
1905 | bufsize = 100; |
1906 | while (1) | |
1907 | { | |
1908 | buf = (char *) xmalloc (bufsize); | |
1909 | bzero (buf, bufsize); | |
1910 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); | |
1911 | if (valsize < bufsize) break; | |
1912 | /* Buffer was not long enough */ | |
1913 | free (buf); | |
1914 | bufsize *= 2; | |
1915 | } | |
1916 | if (valsize == -1) | |
1917 | { | |
1918 | free (buf); | |
1919 | return Qnil; | |
1920 | } | |
1921 | val = make_string (buf, valsize); | |
1922 | free (buf); | |
1923 | return val; | |
1924 | #else /* not S_IFLNK */ | |
1925 | return Qnil; | |
1926 | #endif /* not S_IFLNK */ | |
1927 | } | |
1928 | ||
1929 | /* Having this before file-symlink-p mysteriously caused it to be forgotten | |
1930 | on the RT/PC. */ | |
1931 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, | |
1932 | "Return t if file FILENAME can be written or created by you.") | |
1933 | (filename) | |
1934 | Lisp_Object filename; | |
1935 | { | |
1936 | Lisp_Object abspath, dir; | |
32f4334d | 1937 | Lisp_Object handler; |
570d7624 JB |
1938 | |
1939 | CHECK_STRING (filename, 0); | |
1940 | abspath = Fexpand_file_name (filename, Qnil); | |
32f4334d RS |
1941 | |
1942 | /* If the file name has special constructs in it, | |
1943 | call the corresponding file handler. */ | |
1944 | handler = find_file_handler (filename); | |
1945 | if (!NILP (handler)) | |
1946 | return call2 (handler, Qfile_writable_p, filename); | |
1947 | ||
570d7624 JB |
1948 | if (access (XSTRING (abspath)->data, 0) >= 0) |
1949 | return (access (XSTRING (abspath)->data, 2) >= 0) ? Qt : Qnil; | |
1950 | dir = Ffile_name_directory (abspath); | |
1951 | #ifdef VMS | |
265a9e55 | 1952 | if (!NILP (dir)) |
570d7624 JB |
1953 | dir = Fdirectory_file_name (dir); |
1954 | #endif /* VMS */ | |
265a9e55 | 1955 | return (access (!NILP (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0 |
570d7624 JB |
1956 | ? Qt : Qnil); |
1957 | } | |
1958 | ||
1959 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, | |
1960 | "Return t if file FILENAME is the name of a directory as a file.\n\ | |
1961 | A directory name spec may be given instead; then the value is t\n\ | |
1962 | if the directory so specified exists and really is a directory.") | |
1963 | (filename) | |
1964 | Lisp_Object filename; | |
1965 | { | |
1966 | register Lisp_Object abspath; | |
1967 | struct stat st; | |
32f4334d | 1968 | Lisp_Object handler; |
570d7624 JB |
1969 | |
1970 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
1971 | ||
32f4334d RS |
1972 | /* If the file name has special constructs in it, |
1973 | call the corresponding file handler. */ | |
1974 | handler = find_file_handler (filename); | |
1975 | if (!NILP (handler)) | |
1976 | return call2 (handler, Qfile_directory_p, filename); | |
1977 | ||
570d7624 JB |
1978 | if (stat (XSTRING (abspath)->data, &st) < 0) |
1979 | return Qnil; | |
1980 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; | |
1981 | } | |
1982 | ||
b72dea2a JB |
1983 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
1984 | "Return t if file FILENAME is the name of a directory as a file,\n\ | |
1985 | and files in that directory can be opened by you. In order to use a\n\ | |
1986 | directory as a buffer's current directory, this predicate must return true.\n\ | |
1987 | A directory name spec may be given instead; then the value is t\n\ | |
1988 | if the directory so specified exists and really is a readable and\n\ | |
1989 | searchable directory.") | |
1990 | (filename) | |
1991 | Lisp_Object filename; | |
1992 | { | |
32f4334d RS |
1993 | Lisp_Object handler; |
1994 | ||
1995 | /* If the file name has special constructs in it, | |
1996 | call the corresponding file handler. */ | |
1997 | handler = find_file_handler (filename); | |
1998 | if (!NILP (handler)) | |
1999 | return call2 (handler, Qfile_accessible_directory_p, filename); | |
2000 | ||
b72dea2a JB |
2001 | if (NILP (Ffile_directory_p (filename)) |
2002 | || NILP (Ffile_executable_p (filename))) | |
2003 | return Qnil; | |
2004 | else | |
2005 | return Qt; | |
2006 | } | |
2007 | ||
570d7624 JB |
2008 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
2009 | "Return mode bits of FILE, as an integer.") | |
2010 | (filename) | |
2011 | Lisp_Object filename; | |
2012 | { | |
2013 | Lisp_Object abspath; | |
2014 | struct stat st; | |
32f4334d | 2015 | Lisp_Object handler; |
570d7624 JB |
2016 | |
2017 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); | |
2018 | ||
32f4334d RS |
2019 | /* If the file name has special constructs in it, |
2020 | call the corresponding file handler. */ | |
2021 | handler = find_file_handler (filename); | |
2022 | if (!NILP (handler)) | |
2023 | return call2 (handler, Qfile_modes, filename); | |
2024 | ||
570d7624 JB |
2025 | if (stat (XSTRING (abspath)->data, &st) < 0) |
2026 | return Qnil; | |
2027 | return make_number (st.st_mode & 07777); | |
2028 | } | |
2029 | ||
2030 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, | |
2031 | "Set mode bits of FILE to MODE (an integer).\n\ | |
2032 | Only the 12 low bits of MODE are used.") | |
2033 | (filename, mode) | |
2034 | Lisp_Object filename, mode; | |
2035 | { | |
2036 | Lisp_Object abspath; | |
32f4334d | 2037 | Lisp_Object handler; |
570d7624 JB |
2038 | |
2039 | abspath = Fexpand_file_name (filename, current_buffer->directory); | |
2040 | CHECK_NUMBER (mode, 1); | |
2041 | ||
32f4334d RS |
2042 | /* If the file name has special constructs in it, |
2043 | call the corresponding file handler. */ | |
2044 | handler = find_file_handler (filename); | |
2045 | if (!NILP (handler)) | |
2046 | return call3 (handler, Qset_file_modes, filename, mode); | |
2047 | ||
570d7624 JB |
2048 | #ifndef APOLLO |
2049 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) | |
2050 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2051 | #else /* APOLLO */ | |
2052 | if (!egetenv ("USE_DOMAIN_ACLS")) | |
2053 | { | |
2054 | struct stat st; | |
2055 | struct timeval tvp[2]; | |
2056 | ||
2057 | /* chmod on apollo also change the file's modtime; need to save the | |
2058 | modtime and then restore it. */ | |
2059 | if (stat (XSTRING (abspath)->data, &st) < 0) | |
2060 | { | |
2061 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2062 | return (Qnil); | |
2063 | } | |
2064 | ||
2065 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) | |
2066 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); | |
2067 | ||
2068 | /* reset the old accessed and modified times. */ | |
2069 | tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */ | |
2070 | tvp[0].tv_usec = 0; | |
2071 | tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */ | |
2072 | tvp[1].tv_usec = 0; | |
2073 | ||
2074 | if (utimes (XSTRING (abspath)->data, tvp) < 0) | |
2075 | report_file_error ("Doing utimes", Fcons (abspath, Qnil)); | |
2076 | } | |
2077 | #endif /* APOLLO */ | |
2078 | ||
2079 | return Qnil; | |
2080 | } | |
2081 | ||
36a8c287 JB |
2082 | DEFUN ("set-umask", Fset_umask, Sset_umask, 1, 1, 0, |
2083 | "Select which permission bits to disable in newly created files.\n\ | |
2084 | MASK should be an integer; if a permission's bit in MASK is 1,\n\ | |
2085 | subsequently created files will not have that permission enabled.\n\ | |
2086 | Only the low 9 bits are used.\n\ | |
2087 | This setting is inherited by subprocesses.") | |
2088 | (mask) | |
2089 | Lisp_Object mask; | |
2090 | { | |
2091 | CHECK_NUMBER (mask, 0); | |
2092 | ||
2093 | umask (XINT (mask) & 0777); | |
2094 | ||
2095 | return Qnil; | |
2096 | } | |
2097 | ||
2098 | DEFUN ("umask", Fumask, Sumask, 0, 0, 0, | |
2099 | "Return the current umask value.\n\ | |
2100 | The umask value determines which permissions are enabled in newly\n\ | |
2101 | created files. If a permission's bit in the umask is 1, subsequently\n\ | |
2102 | created files will not have that permission enabled.") | |
2103 | () | |
2104 | { | |
2105 | Lisp_Object mask; | |
2106 | ||
2107 | XSET (mask, Lisp_Int, umask (0)); | |
2108 | umask (XINT (mask)); | |
2109 | ||
2110 | return mask; | |
2111 | } | |
2112 | ||
85ffea93 RS |
2113 | #ifdef unix |
2114 | ||
2115 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", | |
2116 | "Tell Unix to finish all pending disk updates.") | |
2117 | () | |
2118 | { | |
2119 | sync (); | |
2120 | return Qnil; | |
2121 | } | |
2122 | ||
2123 | #endif /* unix */ | |
2124 | ||
570d7624 JB |
2125 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
2126 | "Return t if file FILE1 is newer than file FILE2.\n\ | |
2127 | If FILE1 does not exist, the answer is nil;\n\ | |
2128 | otherwise, if FILE2 does not exist, the answer is t.") | |
2129 | (file1, file2) | |
2130 | Lisp_Object file1, file2; | |
2131 | { | |
32f4334d | 2132 | Lisp_Object abspath1, abspath2; |
570d7624 JB |
2133 | struct stat st; |
2134 | int mtime1; | |
32f4334d | 2135 | Lisp_Object handler; |
570d7624 JB |
2136 | |
2137 | CHECK_STRING (file1, 0); | |
2138 | CHECK_STRING (file2, 0); | |
2139 | ||
32f4334d RS |
2140 | abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); |
2141 | abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); | |
570d7624 | 2142 | |
32f4334d RS |
2143 | /* If the file name has special constructs in it, |
2144 | call the corresponding file handler. */ | |
2145 | handler = find_file_handler (abspath1); | |
2146 | if (!NILP (handler)) | |
2147 | return call3 (handler, Qfile_newer_than_file_p, abspath1, abspath2); | |
2148 | ||
2149 | if (stat (XSTRING (abspath1)->data, &st) < 0) | |
570d7624 JB |
2150 | return Qnil; |
2151 | ||
2152 | mtime1 = st.st_mtime; | |
2153 | ||
32f4334d | 2154 | if (stat (XSTRING (abspath2)->data, &st) < 0) |
570d7624 JB |
2155 | return Qt; |
2156 | ||
2157 | return (mtime1 > st.st_mtime) ? Qt : Qnil; | |
2158 | } | |
2159 | \f | |
570d7624 JB |
2160 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
2161 | 1, 2, 0, | |
2162 | "Insert contents of file FILENAME after point.\n\ | |
2163 | Returns list of absolute pathname and length of data inserted.\n\ | |
2164 | If second argument VISIT is non-nil, the buffer's visited filename\n\ | |
2165 | and last save file modtime are set, and it is marked unmodified.\n\ | |
2166 | If visiting and the file does not exist, visiting is completed\n\ | |
2167 | before the error is signaled.") | |
2168 | (filename, visit) | |
2169 | Lisp_Object filename, visit; | |
2170 | { | |
2171 | struct stat st; | |
2172 | register int fd; | |
2173 | register int inserted = 0; | |
2174 | register int how_much; | |
2175 | int count = specpdl_ptr - specpdl; | |
2176 | struct gcpro gcpro1; | |
32f4334d RS |
2177 | Lisp_Object handler, val; |
2178 | ||
2179 | val = Qnil; | |
2180 | ||
570d7624 | 2181 | GCPRO1 (filename); |
265a9e55 | 2182 | if (!NILP (current_buffer->read_only)) |
570d7624 JB |
2183 | Fbarf_if_buffer_read_only(); |
2184 | ||
2185 | CHECK_STRING (filename, 0); | |
2186 | filename = Fexpand_file_name (filename, Qnil); | |
2187 | ||
32f4334d RS |
2188 | /* If the file name has special constructs in it, |
2189 | call the corresponding file handler. */ | |
2190 | handler = find_file_handler (filename); | |
2191 | if (!NILP (handler)) | |
2192 | { | |
2193 | val = call3 (handler, Qinsert_file_contents, filename, visit); | |
2194 | st.st_mtime = 0; | |
2195 | goto handled; | |
2196 | } | |
2197 | ||
570d7624 JB |
2198 | fd = -1; |
2199 | ||
2200 | #ifndef APOLLO | |
2201 | if (stat (XSTRING (filename)->data, &st) < 0 | |
349a7710 | 2202 | || (fd = open (XSTRING (filename)->data, 0)) < 0) |
570d7624 JB |
2203 | #else |
2204 | if ((fd = open (XSTRING (filename)->data, 0)) < 0 | |
2205 | || fstat (fd, &st) < 0) | |
2206 | #endif /* not APOLLO */ | |
2207 | { | |
2208 | if (fd >= 0) close (fd); | |
265a9e55 | 2209 | if (NILP (visit)) |
570d7624 JB |
2210 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
2211 | st.st_mtime = -1; | |
2212 | how_much = 0; | |
2213 | goto notfound; | |
2214 | } | |
2215 | ||
2216 | record_unwind_protect (close_file_unwind, make_number (fd)); | |
2217 | ||
be53b411 JB |
2218 | #ifdef S_IFSOCK |
2219 | /* This code will need to be changed in order to work on named | |
2220 | pipes, and it's probably just not worth it. So we should at | |
2221 | least signal an error. */ | |
2222 | if ((st.st_mode & S_IFMT) == S_IFSOCK) | |
2223 | Fsignal (Qfile_error, | |
2224 | Fcons (build_string ("reading from named pipe"), | |
2225 | Fcons (filename, Qnil))); | |
2226 | #endif | |
2227 | ||
570d7624 JB |
2228 | /* Supposedly happens on VMS. */ |
2229 | if (st.st_size < 0) | |
2230 | error ("File size is negative"); | |
be53b411 | 2231 | |
570d7624 JB |
2232 | { |
2233 | register Lisp_Object temp; | |
2234 | ||
2235 | /* Make sure point-max won't overflow after this insertion. */ | |
2236 | XSET (temp, Lisp_Int, st.st_size + Z); | |
2237 | if (st.st_size + Z != XINT (temp)) | |
2238 | error ("maximum buffer size exceeded"); | |
2239 | } | |
2240 | ||
265a9e55 | 2241 | if (NILP (visit)) |
570d7624 JB |
2242 | prepare_to_modify_buffer (point, point); |
2243 | ||
2244 | move_gap (point); | |
2245 | if (GAP_SIZE < st.st_size) | |
2246 | make_gap (st.st_size - GAP_SIZE); | |
2247 | ||
2248 | while (1) | |
2249 | { | |
2250 | int try = min (st.st_size - inserted, 64 << 10); | |
b5148e85 RS |
2251 | int this; |
2252 | ||
2253 | /* Allow quitting out of the actual I/O. */ | |
2254 | immediate_quit = 1; | |
2255 | QUIT; | |
2256 | this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try); | |
2257 | immediate_quit = 0; | |
570d7624 JB |
2258 | |
2259 | if (this <= 0) | |
2260 | { | |
2261 | how_much = this; | |
2262 | break; | |
2263 | } | |
2264 | ||
2265 | GPT += this; | |
2266 | GAP_SIZE -= this; | |
2267 | ZV += this; | |
2268 | Z += this; | |
2269 | inserted += this; | |
2270 | } | |
2271 | ||
2272 | if (inserted > 0) | |
2273 | MODIFF++; | |
2274 | record_insert (point, inserted); | |
2275 | ||
2276 | close (fd); | |
2277 | ||
2278 | /* Discard the unwind protect */ | |
2279 | specpdl_ptr = specpdl + count; | |
2280 | ||
2281 | if (how_much < 0) | |
2282 | error ("IO error reading %s: %s", | |
2283 | XSTRING (filename)->data, err_str (errno)); | |
2284 | ||
2285 | notfound: | |
32f4334d | 2286 | handled: |
570d7624 | 2287 | |
265a9e55 | 2288 | if (!NILP (visit)) |
570d7624 JB |
2289 | { |
2290 | current_buffer->undo_list = Qnil; | |
2291 | #ifdef APOLLO | |
2292 | stat (XSTRING (filename)->data, &st); | |
2293 | #endif | |
2294 | current_buffer->modtime = st.st_mtime; | |
2295 | current_buffer->save_modified = MODIFF; | |
2296 | current_buffer->auto_save_modified = MODIFF; | |
2297 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2298 | #ifdef CLASH_DETECTION | |
32f4334d RS |
2299 | if (NILP (handler)) |
2300 | { | |
2301 | if (!NILP (current_buffer->filename)) | |
2302 | unlock_file (current_buffer->filename); | |
2303 | unlock_file (filename); | |
2304 | } | |
570d7624 JB |
2305 | #endif /* CLASH_DETECTION */ |
2306 | current_buffer->filename = filename; | |
2307 | /* If visiting nonexistent file, return nil. */ | |
32f4334d | 2308 | if (current_buffer->modtime == -1) |
570d7624 JB |
2309 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
2310 | } | |
2311 | ||
2312 | signal_after_change (point, 0, inserted); | |
2313 | ||
32f4334d RS |
2314 | if (!NILP (val)) |
2315 | RETURN_UNGCPRO (val); | |
9b7828a5 JB |
2316 | RETURN_UNGCPRO (Fcons (filename, |
2317 | Fcons (make_number (inserted), | |
2318 | Qnil))); | |
570d7624 JB |
2319 | } |
2320 | ||
2321 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5, | |
2322 | "r\nFWrite region to file: ", | |
2323 | "Write current region into specified file.\n\ | |
2324 | When called from a program, takes three arguments:\n\ | |
2325 | START, END and FILENAME. START and END are buffer positions.\n\ | |
2326 | Optional fourth argument APPEND if non-nil means\n\ | |
2327 | append to existing file contents (if any).\n\ | |
2328 | Optional fifth argument VISIT if t means\n\ | |
2329 | set the last-save-file-modtime of buffer to this file's modtime\n\ | |
2330 | and mark buffer not modified.\n\ | |
2331 | If VISIT is neither t nor nil, it means do not print\n\ | |
2332 | the \"Wrote file\" message.\n\ | |
2333 | Kludgy feature: if START is a string, then that string is written\n\ | |
2334 | to the file, instead of any buffer contents, and END is ignored.") | |
2335 | (start, end, filename, append, visit) | |
2336 | Lisp_Object start, end, filename, append, visit; | |
2337 | { | |
2338 | register int desc; | |
2339 | int failure; | |
2340 | int save_errno; | |
2341 | unsigned char *fn; | |
2342 | struct stat st; | |
2343 | int tem; | |
2344 | int count = specpdl_ptr - specpdl; | |
2345 | #ifdef VMS | |
2346 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ | |
2347 | #endif /* VMS */ | |
3eac9910 | 2348 | Lisp_Object handler; |
570d7624 JB |
2349 | |
2350 | /* Special kludge to simplify auto-saving */ | |
265a9e55 | 2351 | if (NILP (start)) |
570d7624 JB |
2352 | { |
2353 | XFASTINT (start) = BEG; | |
2354 | XFASTINT (end) = Z; | |
2355 | } | |
2356 | else if (XTYPE (start) != Lisp_String) | |
2357 | validate_region (&start, &end); | |
2358 | ||
2359 | filename = Fexpand_file_name (filename, Qnil); | |
2360 | fn = XSTRING (filename)->data; | |
2361 | ||
32f4334d RS |
2362 | /* If the file name has special constructs in it, |
2363 | call the corresponding file handler. */ | |
2364 | handler = find_file_handler (filename); | |
3eac9910 | 2365 | |
32f4334d RS |
2366 | if (!NILP (handler)) |
2367 | { | |
2368 | Lisp_Object args[7]; | |
2369 | Lisp_Object val; | |
2370 | args[0] = handler; | |
2371 | args[1] = Qwrite_region; | |
2372 | args[2] = start; | |
2373 | args[3] = end; | |
2374 | args[4] = filename; | |
2375 | args[5] = append; | |
2376 | args[6] = visit; | |
2377 | val = Ffuncall (7, args); | |
2378 | ||
2379 | /* Do this before reporting IO error | |
2380 | to avoid a "file has changed on disk" warning on | |
2381 | next attempt to save. */ | |
2382 | if (EQ (visit, Qt)) | |
2383 | { | |
2384 | current_buffer->modtime = 0; | |
2385 | current_buffer->save_modified = MODIFF; | |
2386 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2387 | current_buffer->filename = filename; | |
2388 | } | |
2389 | return val; | |
2390 | } | |
2391 | ||
570d7624 JB |
2392 | #ifdef CLASH_DETECTION |
2393 | if (!auto_saving) | |
2394 | lock_file (filename); | |
2395 | #endif /* CLASH_DETECTION */ | |
2396 | ||
2397 | desc = -1; | |
265a9e55 | 2398 | if (!NILP (append)) |
570d7624 JB |
2399 | desc = open (fn, O_WRONLY); |
2400 | ||
2401 | if (desc < 0) | |
2402 | #ifdef VMS | |
2403 | if (auto_saving) /* Overwrite any previous version of autosave file */ | |
2404 | { | |
2405 | vms_truncate (fn); /* if fn exists, truncate to zero length */ | |
2406 | desc = open (fn, O_RDWR); | |
2407 | if (desc < 0) | |
2408 | desc = creat_copy_attrs (XTYPE (current_buffer->filename) == Lisp_String | |
b72dea2a JB |
2409 | ? XSTRING (current_buffer->filename)->data : 0, |
2410 | fn); | |
570d7624 JB |
2411 | } |
2412 | else /* Write to temporary name and rename if no errors */ | |
2413 | { | |
2414 | Lisp_Object temp_name; | |
2415 | temp_name = Ffile_name_directory (filename); | |
2416 | ||
265a9e55 | 2417 | if (!NILP (temp_name)) |
570d7624 JB |
2418 | { |
2419 | temp_name = Fmake_temp_name (concat2 (temp_name, | |
2420 | build_string ("$$SAVE$$"))); | |
2421 | fname = XSTRING (filename)->data; | |
2422 | fn = XSTRING (temp_name)->data; | |
2423 | desc = creat_copy_attrs (fname, fn); | |
2424 | if (desc < 0) | |
2425 | { | |
2426 | /* If we can't open the temporary file, try creating a new | |
2427 | version of the original file. VMS "creat" creates a | |
2428 | new version rather than truncating an existing file. */ | |
2429 | fn = fname; | |
2430 | fname = 0; | |
2431 | desc = creat (fn, 0666); | |
2432 | #if 0 /* This can clobber an existing file and fail to replace it, | |
2433 | if the user runs out of space. */ | |
2434 | if (desc < 0) | |
2435 | { | |
2436 | /* We can't make a new version; | |
2437 | try to truncate and rewrite existing version if any. */ | |
2438 | vms_truncate (fn); | |
2439 | desc = open (fn, O_RDWR); | |
2440 | } | |
2441 | #endif | |
2442 | } | |
2443 | } | |
2444 | else | |
2445 | desc = creat (fn, 0666); | |
2446 | } | |
2447 | #else /* not VMS */ | |
2448 | desc = creat (fn, auto_saving ? auto_save_mode_bits : 0666); | |
2449 | #endif /* not VMS */ | |
2450 | ||
2451 | if (desc < 0) | |
2452 | { | |
2453 | #ifdef CLASH_DETECTION | |
2454 | save_errno = errno; | |
2455 | if (!auto_saving) unlock_file (filename); | |
2456 | errno = save_errno; | |
2457 | #endif /* CLASH_DETECTION */ | |
2458 | report_file_error ("Opening output file", Fcons (filename, Qnil)); | |
2459 | } | |
2460 | ||
2461 | record_unwind_protect (close_file_unwind, make_number (desc)); | |
2462 | ||
265a9e55 | 2463 | if (!NILP (append)) |
570d7624 JB |
2464 | if (lseek (desc, 0, 2) < 0) |
2465 | { | |
2466 | #ifdef CLASH_DETECTION | |
2467 | if (!auto_saving) unlock_file (filename); | |
2468 | #endif /* CLASH_DETECTION */ | |
2469 | report_file_error ("Lseek error", Fcons (filename, Qnil)); | |
2470 | } | |
2471 | ||
2472 | #ifdef VMS | |
2473 | /* | |
2474 | * Kludge Warning: The VMS C RTL likes to insert carriage returns | |
2475 | * if we do writes that don't end with a carriage return. Furthermore | |
2476 | * it cannot handle writes of more then 16K. The modified | |
2477 | * version of "sys_write" in SYSDEP.C (see comment there) copes with | |
2478 | * this EXCEPT for the last record (iff it doesn't end with a carriage | |
2479 | * return). This implies that if your buffer doesn't end with a carriage | |
2480 | * return, you get one free... tough. However it also means that if | |
2481 | * we make two calls to sys_write (a la the following code) you can | |
2482 | * get one at the gap as well. The easiest way to fix this (honest) | |
2483 | * is to move the gap to the next newline (or the end of the buffer). | |
2484 | * Thus this change. | |
2485 | * | |
2486 | * Yech! | |
2487 | */ | |
2488 | if (GPT > BEG && GPT_ADDR[-1] != '\n') | |
2489 | move_gap (find_next_newline (GPT, 1)); | |
2490 | #endif | |
2491 | ||
2492 | failure = 0; | |
2493 | immediate_quit = 1; | |
2494 | ||
2495 | if (XTYPE (start) == Lisp_String) | |
2496 | { | |
2497 | failure = 0 > e_write (desc, XSTRING (start)->data, | |
2498 | XSTRING (start)->size); | |
2499 | save_errno = errno; | |
2500 | } | |
2501 | else if (XINT (start) != XINT (end)) | |
2502 | { | |
2503 | if (XINT (start) < GPT) | |
2504 | { | |
2505 | register int end1 = XINT (end); | |
2506 | tem = XINT (start); | |
2507 | failure = 0 > e_write (desc, &FETCH_CHAR (tem), | |
2508 | min (GPT, end1) - tem); | |
2509 | save_errno = errno; | |
2510 | } | |
2511 | ||
2512 | if (XINT (end) > GPT && !failure) | |
2513 | { | |
2514 | tem = XINT (start); | |
2515 | tem = max (tem, GPT); | |
2516 | failure = 0 > e_write (desc, &FETCH_CHAR (tem), XINT (end) - tem); | |
2517 | save_errno = errno; | |
2518 | } | |
2519 | } | |
2520 | ||
2521 | immediate_quit = 0; | |
2522 | ||
2523 | #ifndef USG | |
2524 | #ifndef VMS | |
2525 | #ifndef BSD4_1 | |
570d7624 JB |
2526 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
2527 | Disk full in NFS may be reported here. */ | |
2528 | if (fsync (desc) < 0) | |
2529 | failure = 1, save_errno = errno; | |
2530 | #endif | |
2531 | #endif | |
570d7624 JB |
2532 | #endif |
2533 | ||
2534 | /* Spurious "file has changed on disk" warnings have been | |
2535 | observed on Suns as well. | |
2536 | It seems that `close' can change the modtime, under nfs. | |
2537 | ||
2538 | (This has supposedly been fixed in Sunos 4, | |
2539 | but who knows about all the other machines with NFS?) */ | |
2540 | #if 0 | |
2541 | ||
2542 | /* On VMS and APOLLO, must do the stat after the close | |
2543 | since closing changes the modtime. */ | |
2544 | #ifndef VMS | |
2545 | #ifndef APOLLO | |
2546 | /* Recall that #if defined does not work on VMS. */ | |
2547 | #define FOO | |
2548 | fstat (desc, &st); | |
2549 | #endif | |
2550 | #endif | |
2551 | #endif | |
2552 | ||
2553 | /* NFS can report a write failure now. */ | |
2554 | if (close (desc) < 0) | |
2555 | failure = 1, save_errno = errno; | |
2556 | ||
2557 | #ifdef VMS | |
2558 | /* If we wrote to a temporary name and had no errors, rename to real name. */ | |
2559 | if (fname) | |
2560 | { | |
2561 | if (!failure) | |
2562 | failure = (rename (fn, fname) != 0), save_errno = errno; | |
2563 | fn = fname; | |
2564 | } | |
2565 | #endif /* VMS */ | |
2566 | ||
2567 | #ifndef FOO | |
2568 | stat (fn, &st); | |
2569 | #endif | |
2570 | /* Discard the unwind protect */ | |
2571 | specpdl_ptr = specpdl + count; | |
2572 | ||
2573 | #ifdef CLASH_DETECTION | |
2574 | if (!auto_saving) | |
2575 | unlock_file (filename); | |
2576 | #endif /* CLASH_DETECTION */ | |
2577 | ||
2578 | /* Do this before reporting IO error | |
2579 | to avoid a "file has changed on disk" warning on | |
2580 | next attempt to save. */ | |
2581 | if (EQ (visit, Qt)) | |
2582 | current_buffer->modtime = st.st_mtime; | |
2583 | ||
2584 | if (failure) | |
2585 | error ("IO error writing %s: %s", fn, err_str (save_errno)); | |
2586 | ||
2587 | if (EQ (visit, Qt)) | |
2588 | { | |
2589 | current_buffer->save_modified = MODIFF; | |
2590 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2591 | current_buffer->filename = filename; | |
2592 | } | |
265a9e55 | 2593 | else if (!NILP (visit)) |
570d7624 JB |
2594 | return Qnil; |
2595 | ||
2596 | if (!auto_saving) | |
2597 | message ("Wrote %s", fn); | |
2598 | ||
2599 | return Qnil; | |
2600 | } | |
2601 | ||
2602 | int | |
2603 | e_write (desc, addr, len) | |
2604 | int desc; | |
2605 | register char *addr; | |
2606 | register int len; | |
2607 | { | |
2608 | char buf[16 * 1024]; | |
2609 | register char *p, *end; | |
2610 | ||
2611 | if (!EQ (current_buffer->selective_display, Qt)) | |
2612 | return write (desc, addr, len) - len; | |
2613 | else | |
2614 | { | |
2615 | p = buf; | |
2616 | end = p + sizeof buf; | |
2617 | while (len--) | |
2618 | { | |
2619 | if (p == end) | |
2620 | { | |
2621 | if (write (desc, buf, sizeof buf) != sizeof buf) | |
2622 | return -1; | |
2623 | p = buf; | |
2624 | } | |
2625 | *p = *addr++; | |
2626 | if (*p++ == '\015') | |
2627 | p[-1] = '\n'; | |
2628 | } | |
2629 | if (p != buf) | |
2630 | if (write (desc, buf, p - buf) != p - buf) | |
2631 | return -1; | |
2632 | } | |
2633 | return 0; | |
2634 | } | |
2635 | ||
2636 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, | |
2637 | Sverify_visited_file_modtime, 1, 1, 0, | |
2638 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ | |
2639 | This means that the file has not been changed since it was visited or saved.") | |
2640 | (buf) | |
2641 | Lisp_Object buf; | |
2642 | { | |
2643 | struct buffer *b; | |
2644 | struct stat st; | |
32f4334d | 2645 | Lisp_Object handler; |
570d7624 JB |
2646 | |
2647 | CHECK_BUFFER (buf, 0); | |
2648 | b = XBUFFER (buf); | |
2649 | ||
2650 | if (XTYPE (b->filename) != Lisp_String) return Qt; | |
2651 | if (b->modtime == 0) return Qt; | |
2652 | ||
32f4334d RS |
2653 | /* If the file name has special constructs in it, |
2654 | call the corresponding file handler. */ | |
3eac9910 | 2655 | handler = find_file_handler (b->filename); |
32f4334d | 2656 | if (!NILP (handler)) |
3eac9910 | 2657 | return call2 (handler, Qverify_visited_file_modtime, b->filename); |
32f4334d | 2658 | |
570d7624 JB |
2659 | if (stat (XSTRING (b->filename)->data, &st) < 0) |
2660 | { | |
2661 | /* If the file doesn't exist now and didn't exist before, | |
2662 | we say that it isn't modified, provided the error is a tame one. */ | |
2663 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) | |
2664 | st.st_mtime = -1; | |
2665 | else | |
2666 | st.st_mtime = 0; | |
2667 | } | |
2668 | if (st.st_mtime == b->modtime | |
2669 | /* If both are positive, accept them if they are off by one second. */ | |
2670 | || (st.st_mtime > 0 && b->modtime > 0 | |
2671 | && (st.st_mtime == b->modtime + 1 | |
2672 | || st.st_mtime == b->modtime - 1))) | |
2673 | return Qt; | |
2674 | return Qnil; | |
2675 | } | |
2676 | ||
2677 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, | |
2678 | Sclear_visited_file_modtime, 0, 0, 0, | |
2679 | "Clear out records of last mod time of visited file.\n\ | |
2680 | Next attempt to save will certainly not complain of a discrepancy.") | |
2681 | () | |
2682 | { | |
2683 | current_buffer->modtime = 0; | |
2684 | return Qnil; | |
2685 | } | |
2686 | ||
2687 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, | |
2688 | Sset_visited_file_modtime, 0, 0, 0, | |
2689 | "Update buffer's recorded modification time from the visited file's time.\n\ | |
2690 | Useful if the buffer was not read from the file normally\n\ | |
2691 | or if the file itself has been changed for some known benign reason.") | |
2692 | () | |
2693 | { | |
2694 | register Lisp_Object filename; | |
2695 | struct stat st; | |
3eac9910 | 2696 | Lisp_Object handler; |
570d7624 JB |
2697 | |
2698 | filename = Fexpand_file_name (current_buffer->filename, Qnil); | |
32f4334d RS |
2699 | |
2700 | /* If the file name has special constructs in it, | |
2701 | call the corresponding file handler. */ | |
2702 | handler = find_file_handler (filename); | |
2703 | if (!NILP (handler)) | |
2704 | current_buffer->modtime = 0; | |
570d7624 | 2705 | |
32f4334d | 2706 | else if (stat (XSTRING (filename)->data, &st) >= 0) |
570d7624 JB |
2707 | current_buffer->modtime = st.st_mtime; |
2708 | ||
2709 | return Qnil; | |
2710 | } | |
2711 | \f | |
2712 | Lisp_Object | |
2713 | auto_save_error () | |
2714 | { | |
2715 | unsigned char *name = XSTRING (current_buffer->name)->data; | |
2716 | ||
2717 | ring_bell (); | |
2718 | message ("Autosaving...error for %s", name); | |
de49a6d3 | 2719 | Fsleep_for (make_number (1), Qnil); |
570d7624 | 2720 | message ("Autosaving...error!for %s", name); |
de49a6d3 | 2721 | Fsleep_for (make_number (1), Qnil); |
570d7624 | 2722 | message ("Autosaving...error for %s", name); |
de49a6d3 | 2723 | Fsleep_for (make_number (1), Qnil); |
570d7624 JB |
2724 | return Qnil; |
2725 | } | |
2726 | ||
2727 | Lisp_Object | |
2728 | auto_save_1 () | |
2729 | { | |
2730 | unsigned char *fn; | |
2731 | struct stat st; | |
2732 | ||
2733 | /* Get visited file's mode to become the auto save file's mode. */ | |
2734 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) | |
2735 | /* But make sure we can overwrite it later! */ | |
2736 | auto_save_mode_bits = st.st_mode | 0600; | |
2737 | else | |
2738 | auto_save_mode_bits = 0666; | |
2739 | ||
2740 | return | |
2741 | Fwrite_region (Qnil, Qnil, | |
2742 | current_buffer->auto_save_file_name, | |
2743 | Qnil, Qlambda); | |
2744 | } | |
2745 | ||
2746 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", | |
2747 | "Auto-save all buffers that need it.\n\ | |
2748 | This is all buffers that have auto-saving enabled\n\ | |
2749 | and are changed since last auto-saved.\n\ | |
2750 | Auto-saving writes the buffer into a file\n\ | |
2751 | so that your editing is not lost if the system crashes.\n\ | |
2752 | This file is not the file you visited; that changes only when you save.\n\n\ | |
2753 | Non-nil first argument means do not print any message if successful.\n\ | |
4746118a | 2754 | Non-nil second argument means save only current buffer.") |
570d7624 JB |
2755 | (nomsg) |
2756 | Lisp_Object nomsg; | |
2757 | { | |
2758 | struct buffer *old = current_buffer, *b; | |
2759 | Lisp_Object tail, buf; | |
2760 | int auto_saved = 0; | |
2761 | char *omessage = echo_area_glyphs; | |
2762 | extern minibuf_level; | |
2763 | ||
2764 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables | |
2765 | point to non-strings reached from Vbuffer_alist. */ | |
2766 | ||
2767 | auto_saving = 1; | |
2768 | if (minibuf_level) | |
2769 | nomsg = Qt; | |
2770 | ||
2771 | /* Vrun_hooks is nil before emacs is dumped, and inc-vers.el will | |
2772 | eventually call do-auto-save, so don't err here in that case. */ | |
265a9e55 | 2773 | if (!NILP (Vrun_hooks)) |
570d7624 JB |
2774 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
2775 | ||
2776 | for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons; | |
2777 | tail = XCONS (tail)->cdr) | |
2778 | { | |
2779 | buf = XCONS (XCONS (tail)->car)->cdr; | |
2780 | b = XBUFFER (buf); | |
2781 | /* Check for auto save enabled | |
2782 | and file changed since last auto save | |
2783 | and file changed since last real save. */ | |
2784 | if (XTYPE (b->auto_save_file_name) == Lisp_String | |
2785 | && b->save_modified < BUF_MODIFF (b) | |
2786 | && b->auto_save_modified < BUF_MODIFF (b)) | |
2787 | { | |
2788 | if ((XFASTINT (b->save_length) * 10 | |
2789 | > (BUF_Z (b) - BUF_BEG (b)) * 13) | |
2790 | /* A short file is likely to change a large fraction; | |
2791 | spare the user annoying messages. */ | |
2792 | && XFASTINT (b->save_length) > 5000 | |
2793 | /* These messages are frequent and annoying for `*mail*'. */ | |
2794 | && !EQ (b->filename, Qnil)) | |
2795 | { | |
2796 | /* It has shrunk too much; turn off auto-saving here. */ | |
2797 | message ("Buffer %s has shrunk a lot; auto save turned off there", | |
2798 | XSTRING (b->name)->data); | |
2799 | /* User can reenable saving with M-x auto-save. */ | |
2800 | b->auto_save_file_name = Qnil; | |
2801 | /* Prevent warning from repeating if user does so. */ | |
2802 | XFASTINT (b->save_length) = 0; | |
2803 | Fsleep_for (make_number (1)); | |
2804 | continue; | |
2805 | } | |
2806 | set_buffer_internal (b); | |
265a9e55 | 2807 | if (!auto_saved && NILP (nomsg)) |
570d7624 JB |
2808 | message1 ("Auto-saving..."); |
2809 | internal_condition_case (auto_save_1, Qt, auto_save_error); | |
2810 | auto_saved++; | |
2811 | b->auto_save_modified = BUF_MODIFF (b); | |
2812 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2813 | set_buffer_internal (old); | |
2814 | } | |
2815 | } | |
2816 | ||
2817 | if (auto_saved) | |
2818 | record_auto_save (); | |
2819 | ||
265a9e55 | 2820 | if (auto_saved && NILP (nomsg)) |
570d7624 JB |
2821 | message1 (omessage ? omessage : "Auto-saving...done"); |
2822 | ||
2823 | auto_saving = 0; | |
2824 | return Qnil; | |
2825 | } | |
2826 | ||
2827 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, | |
2828 | Sset_buffer_auto_saved, 0, 0, 0, | |
2829 | "Mark current buffer as auto-saved with its current text.\n\ | |
2830 | No auto-save file will be written until the buffer changes again.") | |
2831 | () | |
2832 | { | |
2833 | current_buffer->auto_save_modified = MODIFF; | |
2834 | XFASTINT (current_buffer->save_length) = Z - BEG; | |
2835 | return Qnil; | |
2836 | } | |
2837 | ||
2838 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, | |
2839 | 0, 0, 0, | |
2840 | "Return t if buffer has been auto-saved since last read in or saved.") | |
2841 | () | |
2842 | { | |
2843 | return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil; | |
2844 | } | |
2845 | \f | |
2846 | /* Reading and completing file names */ | |
2847 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); | |
2848 | ||
2849 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, | |
2850 | 3, 3, 0, | |
2851 | "Internal subroutine for read-file-name. Do not call this.") | |
2852 | (string, dir, action) | |
2853 | Lisp_Object string, dir, action; | |
2854 | /* action is nil for complete, t for return list of completions, | |
2855 | lambda for verify final value */ | |
2856 | { | |
2857 | Lisp_Object name, specdir, realdir, val, orig_string; | |
2858 | ||
2859 | if (XSTRING (string)->size == 0) | |
2860 | { | |
2861 | orig_string = Qnil; | |
2862 | name = string; | |
2863 | realdir = dir; | |
2864 | if (EQ (action, Qlambda)) | |
2865 | return Qnil; | |
2866 | } | |
2867 | else | |
2868 | { | |
2869 | orig_string = string; | |
2870 | string = Fsubstitute_in_file_name (string); | |
2871 | name = Ffile_name_nondirectory (string); | |
2872 | realdir = Ffile_name_directory (string); | |
265a9e55 | 2873 | if (NILP (realdir)) |
570d7624 JB |
2874 | realdir = dir; |
2875 | else | |
2876 | realdir = Fexpand_file_name (realdir, dir); | |
2877 | } | |
2878 | ||
265a9e55 | 2879 | if (NILP (action)) |
570d7624 JB |
2880 | { |
2881 | specdir = Ffile_name_directory (string); | |
2882 | val = Ffile_name_completion (name, realdir); | |
2883 | if (XTYPE (val) != Lisp_String) | |
2884 | { | |
265a9e55 | 2885 | if (NILP (Fstring_equal (string, orig_string))) |
570d7624 JB |
2886 | return string; |
2887 | return (val); | |
2888 | } | |
2889 | ||
265a9e55 | 2890 | if (!NILP (specdir)) |
570d7624 JB |
2891 | val = concat2 (specdir, val); |
2892 | #ifndef VMS | |
2893 | { | |
2894 | register unsigned char *old, *new; | |
2895 | register int n; | |
2896 | int osize, count; | |
2897 | ||
2898 | osize = XSTRING (val)->size; | |
2899 | /* Quote "$" as "$$" to get it past substitute-in-file-name */ | |
2900 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) | |
2901 | if (*old++ == '$') count++; | |
2902 | if (count > 0) | |
2903 | { | |
2904 | old = XSTRING (val)->data; | |
2905 | val = Fmake_string (make_number (osize + count), make_number (0)); | |
2906 | new = XSTRING (val)->data; | |
2907 | for (n = osize; n > 0; n--) | |
2908 | if (*old != '$') | |
2909 | *new++ = *old++; | |
2910 | else | |
2911 | { | |
2912 | *new++ = '$'; | |
2913 | *new++ = '$'; | |
2914 | old++; | |
2915 | } | |
2916 | } | |
2917 | } | |
2918 | #endif /* Not VMS */ | |
2919 | return (val); | |
2920 | } | |
2921 | ||
2922 | if (EQ (action, Qt)) | |
2923 | return Ffile_name_all_completions (name, realdir); | |
2924 | /* Only other case actually used is ACTION = lambda */ | |
2925 | #ifdef VMS | |
2926 | /* Supposedly this helps commands such as `cd' that read directory names, | |
2927 | but can someone explain how it helps them? -- RMS */ | |
2928 | if (XSTRING (name)->size == 0) | |
2929 | return Qt; | |
2930 | #endif /* VMS */ | |
2931 | return Ffile_exists_p (string); | |
2932 | } | |
2933 | ||
2934 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, | |
2935 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ | |
2936 | Value is not expanded---you must call `expand-file-name' yourself.\n\ | |
2937 | Default name to DEFAULT if user enters a null string.\n\ | |
2938 | (If DEFAULT is omitted, the visited file name is used.)\n\ | |
2939 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ | |
2940 | Non-nil and non-t means also require confirmation after completion.\n\ | |
2941 | Fifth arg INITIAL specifies text to start with.\n\ | |
2942 | DIR defaults to current buffer's directory default.") | |
2943 | (prompt, dir, defalt, mustmatch, initial) | |
2944 | Lisp_Object prompt, dir, defalt, mustmatch, initial; | |
2945 | { | |
85b5fe07 | 2946 | Lisp_Object val, insdef, insdef1, tem; |
570d7624 JB |
2947 | struct gcpro gcpro1, gcpro2; |
2948 | register char *homedir; | |
2949 | int count; | |
2950 | ||
265a9e55 | 2951 | if (NILP (dir)) |
570d7624 | 2952 | dir = current_buffer->directory; |
265a9e55 | 2953 | if (NILP (defalt)) |
570d7624 JB |
2954 | defalt = current_buffer->filename; |
2955 | ||
2956 | /* If dir starts with user's homedir, change that to ~. */ | |
2957 | homedir = (char *) egetenv ("HOME"); | |
2958 | if (homedir != 0 | |
2959 | && XTYPE (dir) == Lisp_String | |
2960 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) | |
2961 | && XSTRING (dir)->data[strlen (homedir)] == '/') | |
2962 | { | |
2963 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, | |
2964 | XSTRING (dir)->size - strlen (homedir) + 1); | |
2965 | XSTRING (dir)->data[0] = '~'; | |
2966 | } | |
2967 | ||
2968 | if (insert_default_directory) | |
2969 | { | |
2970 | insdef = dir; | |
85b5fe07 | 2971 | insdef1 = dir; |
265a9e55 | 2972 | if (!NILP (initial)) |
570d7624 | 2973 | { |
15c65264 | 2974 | Lisp_Object args[2], pos; |
570d7624 JB |
2975 | |
2976 | args[0] = insdef; | |
2977 | args[1] = initial; | |
2978 | insdef = Fconcat (2, args); | |
509b05ed | 2979 | pos = make_number (XSTRING (dir)->size); |
85b5fe07 | 2980 | insdef1 = Fcons (insdef, pos); |
570d7624 | 2981 | } |
570d7624 JB |
2982 | } |
2983 | else | |
85b5fe07 | 2984 | insdef = Qnil, insdef1 = Qnil; |
570d7624 JB |
2985 | |
2986 | #ifdef VMS | |
2987 | count = specpdl_ptr - specpdl; | |
2988 | specbind (intern ("completion-ignore-case"), Qt); | |
2989 | #endif | |
2990 | ||
2991 | GCPRO2 (insdef, defalt); | |
2992 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), | |
85b5fe07 | 2993 | dir, mustmatch, insdef1, |
15c65264 | 2994 | Qfile_name_history); |
570d7624 JB |
2995 | |
2996 | #ifdef VMS | |
2997 | unbind_to (count, Qnil); | |
2998 | #endif | |
2999 | ||
3000 | UNGCPRO; | |
265a9e55 | 3001 | if (NILP (val)) |
570d7624 JB |
3002 | error ("No file name specified"); |
3003 | tem = Fstring_equal (val, insdef); | |
265a9e55 | 3004 | if (!NILP (tem) && !NILP (defalt)) |
570d7624 JB |
3005 | return defalt; |
3006 | return Fsubstitute_in_file_name (val); | |
3007 | } | |
3008 | ||
3009 | #if 0 /* Old version */ | |
3010 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, | |
3011 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ | |
3012 | Value is not expanded---you must call `expand-file-name' yourself.\n\ | |
3013 | Default name to DEFAULT if user enters a null string.\n\ | |
3014 | (If DEFAULT is omitted, the visited file name is used.)\n\ | |
3015 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ | |
3016 | Non-nil and non-t means also require confirmation after completion.\n\ | |
3017 | Fifth arg INITIAL specifies text to start with.\n\ | |
3018 | DIR defaults to current buffer's directory default.") | |
3019 | (prompt, dir, defalt, mustmatch, initial) | |
3020 | Lisp_Object prompt, dir, defalt, mustmatch, initial; | |
3021 | { | |
3022 | Lisp_Object val, insdef, tem; | |
3023 | struct gcpro gcpro1, gcpro2; | |
3024 | register char *homedir; | |
3025 | int count; | |
3026 | ||
265a9e55 | 3027 | if (NILP (dir)) |
570d7624 | 3028 | dir = current_buffer->directory; |
265a9e55 | 3029 | if (NILP (defalt)) |
570d7624 JB |
3030 | defalt = current_buffer->filename; |
3031 | ||
3032 | /* If dir starts with user's homedir, change that to ~. */ | |
3033 | homedir = (char *) egetenv ("HOME"); | |
3034 | if (homedir != 0 | |
3035 | && XTYPE (dir) == Lisp_String | |
3036 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) | |
3037 | && XSTRING (dir)->data[strlen (homedir)] == '/') | |
3038 | { | |
3039 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, | |
3040 | XSTRING (dir)->size - strlen (homedir) + 1); | |
3041 | XSTRING (dir)->data[0] = '~'; | |
3042 | } | |
3043 | ||
265a9e55 | 3044 | if (!NILP (initial)) |
570d7624 JB |
3045 | insdef = initial; |
3046 | else if (insert_default_directory) | |
3047 | insdef = dir; | |
3048 | else | |
3049 | insdef = build_string (""); | |
3050 | ||
3051 | #ifdef VMS | |
3052 | count = specpdl_ptr - specpdl; | |
3053 | specbind (intern ("completion-ignore-case"), Qt); | |
3054 | #endif | |
3055 | ||
3056 | GCPRO2 (insdef, defalt); | |
3057 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), | |
3058 | dir, mustmatch, | |
15c65264 RS |
3059 | insert_default_directory ? insdef : Qnil, |
3060 | Qfile_name_history); | |
570d7624 JB |
3061 | |
3062 | #ifdef VMS | |
3063 | unbind_to (count, Qnil); | |
3064 | #endif | |
3065 | ||
3066 | UNGCPRO; | |
265a9e55 | 3067 | if (NILP (val)) |
570d7624 JB |
3068 | error ("No file name specified"); |
3069 | tem = Fstring_equal (val, insdef); | |
265a9e55 | 3070 | if (!NILP (tem) && !NILP (defalt)) |
570d7624 JB |
3071 | return defalt; |
3072 | return Fsubstitute_in_file_name (val); | |
3073 | } | |
3074 | #endif /* Old version */ | |
3075 | \f | |
3076 | syms_of_fileio () | |
3077 | { | |
32f4334d RS |
3078 | Qcopy_file = intern ("copy-file"); |
3079 | Qmake_directory = intern ("make-directory"); | |
3080 | Qdelete_directory = intern ("delete-directory"); | |
3081 | Qdelete_file = intern ("delete-file"); | |
3082 | Qrename_file = intern ("rename-file"); | |
3083 | Qadd_name_to_file = intern ("add-name-to-file"); | |
3084 | Qmake_symbolic_link = intern ("make-symbolic-link"); | |
3085 | Qfile_exists_p = intern ("file-exists-p"); | |
3086 | Qfile_executable_p = intern ("file-executable-p"); | |
3087 | Qfile_readable_p = intern ("file-readable-p"); | |
3088 | Qfile_symlink_p = intern ("file-symlink-p"); | |
3089 | Qfile_writable_p = intern ("file-writable-p"); | |
3090 | Qfile_directory_p = intern ("file-directory-p"); | |
3091 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); | |
3092 | Qfile_modes = intern ("file-modes"); | |
3093 | Qset_file_modes = intern ("set-file-modes"); | |
3094 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); | |
3095 | Qinsert_file_contents = intern ("insert-file-contents"); | |
3096 | Qwrite_region = intern ("write-region"); | |
3097 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); | |
3098 | ||
15c65264 RS |
3099 | Qfile_name_history = intern ("file-name-history"); |
3100 | Fset (Qfile_name_history, Qnil); | |
3101 | ||
3102 | staticpro (&Qcopy_file); | |
3103 | staticpro (&Qmake_directory); | |
3104 | staticpro (&Qdelete_directory); | |
3105 | staticpro (&Qdelete_file); | |
3106 | staticpro (&Qrename_file); | |
3107 | staticpro (&Qadd_name_to_file); | |
3108 | staticpro (&Qmake_symbolic_link); | |
3109 | staticpro (&Qfile_exists_p); | |
3110 | staticpro (&Qfile_executable_p); | |
3111 | staticpro (&Qfile_readable_p); | |
3112 | staticpro (&Qfile_symlink_p); | |
3113 | staticpro (&Qfile_writable_p); | |
3114 | staticpro (&Qfile_directory_p); | |
3115 | staticpro (&Qfile_accessible_directory_p); | |
3116 | staticpro (&Qfile_modes); | |
3117 | staticpro (&Qset_file_modes); | |
3118 | staticpro (&Qfile_newer_than_file_p); | |
3119 | staticpro (&Qinsert_file_contents); | |
3120 | staticpro (&Qwrite_region); | |
3121 | staticpro (&Qverify_visited_file_modtime); | |
3122 | staticpro (&Qfile_name_history); | |
3123 | ||
570d7624 JB |
3124 | Qfile_error = intern ("file-error"); |
3125 | staticpro (&Qfile_error); | |
3126 | Qfile_already_exists = intern("file-already-exists"); | |
3127 | staticpro (&Qfile_already_exists); | |
3128 | ||
3129 | Fput (Qfile_error, Qerror_conditions, | |
3130 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); | |
3131 | Fput (Qfile_error, Qerror_message, | |
3132 | build_string ("File error")); | |
3133 | ||
3134 | Fput (Qfile_already_exists, Qerror_conditions, | |
3135 | Fcons (Qfile_already_exists, | |
3136 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); | |
3137 | Fput (Qfile_already_exists, Qerror_message, | |
3138 | build_string ("File already exists")); | |
3139 | ||
3140 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, | |
3141 | "*Non-nil means when reading a filename start with default dir in minibuffer."); | |
3142 | insert_default_directory = 1; | |
3143 | ||
3144 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, | |
3145 | "*Non-nil means write new files with record format `stmlf'.\n\ | |
3146 | nil means use format `var'. This variable is meaningful only on VMS."); | |
3147 | vms_stmlf_recfm = 0; | |
3148 | ||
1d1826db RS |
3149 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
3150 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ | |
3151 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ | |
3152 | HANDLER.\n\ | |
3153 | \n\ | |
3154 | The first argument given to HANDLER is the name of the I/O primitive\n\ | |
3155 | to be handled; the remaining arguments are the arguments that were\n\ | |
3156 | passed to that primitive. For example, if you do\n\ | |
3157 | (file-exists-p FILENAME)\n\ | |
3158 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ | |
3159 | (funcall HANDLER FILENAME)"); | |
570d7624 JB |
3160 | defsubr (&Sfile_name_directory); |
3161 | defsubr (&Sfile_name_nondirectory); | |
3162 | defsubr (&Sfile_name_as_directory); | |
3163 | defsubr (&Sdirectory_file_name); | |
3164 | defsubr (&Smake_temp_name); | |
3165 | defsubr (&Sexpand_file_name); | |
3166 | defsubr (&Ssubstitute_in_file_name); | |
3167 | defsubr (&Scopy_file); | |
3168 | defsubr (&Smake_directory); | |
aa734e17 | 3169 | defsubr (&Sdelete_directory); |
570d7624 JB |
3170 | defsubr (&Sdelete_file); |
3171 | defsubr (&Srename_file); | |
3172 | defsubr (&Sadd_name_to_file); | |
3173 | #ifdef S_IFLNK | |
3174 | defsubr (&Smake_symbolic_link); | |
3175 | #endif /* S_IFLNK */ | |
3176 | #ifdef VMS | |
3177 | defsubr (&Sdefine_logical_name); | |
3178 | #endif /* VMS */ | |
3179 | #ifdef HPUX_NET | |
3180 | defsubr (&Ssysnetunam); | |
3181 | #endif /* HPUX_NET */ | |
3182 | defsubr (&Sfile_name_absolute_p); | |
3183 | defsubr (&Sfile_exists_p); | |
3184 | defsubr (&Sfile_executable_p); | |
3185 | defsubr (&Sfile_readable_p); | |
3186 | defsubr (&Sfile_writable_p); | |
3187 | defsubr (&Sfile_symlink_p); | |
3188 | defsubr (&Sfile_directory_p); | |
b72dea2a | 3189 | defsubr (&Sfile_accessible_directory_p); |
570d7624 JB |
3190 | defsubr (&Sfile_modes); |
3191 | defsubr (&Sset_file_modes); | |
36a8c287 JB |
3192 | defsubr (&Sset_umask); |
3193 | defsubr (&Sumask); | |
570d7624 JB |
3194 | defsubr (&Sfile_newer_than_file_p); |
3195 | defsubr (&Sinsert_file_contents); | |
3196 | defsubr (&Swrite_region); | |
3197 | defsubr (&Sverify_visited_file_modtime); | |
3198 | defsubr (&Sclear_visited_file_modtime); | |
3199 | defsubr (&Sset_visited_file_modtime); | |
3200 | defsubr (&Sdo_auto_save); | |
3201 | defsubr (&Sset_buffer_auto_saved); | |
3202 | defsubr (&Srecent_auto_save_p); | |
3203 | ||
3204 | defsubr (&Sread_file_name_internal); | |
3205 | defsubr (&Sread_file_name); | |
85ffea93 RS |
3206 | |
3207 | defsubr (&Sunix_sync); | |
570d7624 | 3208 | } |