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