| 1 | /* File IO for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993 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 2, 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 | #include <config.h> |
| 21 | |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/stat.h> |
| 24 | |
| 25 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
| 26 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) |
| 27 | #endif |
| 28 | |
| 29 | #if !defined (S_ISREG) && defined (S_IFREG) |
| 30 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) |
| 31 | #endif |
| 32 | |
| 33 | #ifdef VMS |
| 34 | #include "vms-pwd.h" |
| 35 | #else |
| 36 | #include <pwd.h> |
| 37 | #endif |
| 38 | |
| 39 | #include <ctype.h> |
| 40 | |
| 41 | #ifdef VMS |
| 42 | #include "dir.h" |
| 43 | #include <perror.h> |
| 44 | #include <stddef.h> |
| 45 | #include <string.h> |
| 46 | #endif |
| 47 | |
| 48 | #include <errno.h> |
| 49 | |
| 50 | #ifndef vax11c |
| 51 | extern int errno; |
| 52 | extern char *sys_errlist[]; |
| 53 | extern int sys_nerr; |
| 54 | #endif |
| 55 | |
| 56 | #define err_str(a) ((a) < sys_nerr ? sys_errlist[a] : "unknown error") |
| 57 | |
| 58 | #ifdef APOLLO |
| 59 | #include <sys/time.h> |
| 60 | #endif |
| 61 | |
| 62 | #ifndef USG |
| 63 | #ifndef VMS |
| 64 | #ifndef BSD4_1 |
| 65 | #define HAVE_FSYNC |
| 66 | #endif |
| 67 | #endif |
| 68 | #endif |
| 69 | |
| 70 | #include "lisp.h" |
| 71 | #include "intervals.h" |
| 72 | #include "buffer.h" |
| 73 | #include "window.h" |
| 74 | |
| 75 | #ifdef VMS |
| 76 | #include <file.h> |
| 77 | #include <rmsdef.h> |
| 78 | #include <fab.h> |
| 79 | #include <nam.h> |
| 80 | #endif |
| 81 | |
| 82 | #include "systime.h" |
| 83 | |
| 84 | #ifdef HPUX |
| 85 | #include <netio.h> |
| 86 | #ifndef HPUX8 |
| 87 | #ifndef HPUX9 |
| 88 | #include <errnet.h> |
| 89 | #endif |
| 90 | #endif |
| 91 | #endif |
| 92 | |
| 93 | #ifndef O_WRONLY |
| 94 | #define O_WRONLY 1 |
| 95 | #endif |
| 96 | |
| 97 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 98 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 99 | |
| 100 | /* Nonzero during writing of auto-save files */ |
| 101 | int auto_saving; |
| 102 | |
| 103 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
| 104 | a new file with the same mode as the original */ |
| 105 | int auto_save_mode_bits; |
| 106 | |
| 107 | /* Alist of elements (REGEXP . HANDLER) for file names |
| 108 | whose I/O is done with a special handler. */ |
| 109 | Lisp_Object Vfile_name_handler_alist; |
| 110 | |
| 111 | /* Functions to be called to process text properties in inserted file. */ |
| 112 | Lisp_Object Vafter_insert_file_functions; |
| 113 | |
| 114 | /* Functions to be called to create text property annotations for file. */ |
| 115 | Lisp_Object Vwrite_region_annotate_functions; |
| 116 | |
| 117 | /* Nonzero means, when reading a filename in the minibuffer, |
| 118 | start out by inserting the default directory into the minibuffer. */ |
| 119 | int insert_default_directory; |
| 120 | |
| 121 | /* On VMS, nonzero means write new files with record format stmlf. |
| 122 | Zero means use var format. */ |
| 123 | int vms_stmlf_recfm; |
| 124 | |
| 125 | Lisp_Object Qfile_error, Qfile_already_exists; |
| 126 | |
| 127 | Lisp_Object Qfile_name_history; |
| 128 | |
| 129 | Lisp_Object Qcar_less_than_car; |
| 130 | |
| 131 | report_file_error (string, data) |
| 132 | char *string; |
| 133 | Lisp_Object data; |
| 134 | { |
| 135 | Lisp_Object errstring; |
| 136 | |
| 137 | if (errno >= 0 && errno < sys_nerr) |
| 138 | errstring = build_string (sys_errlist[errno]); |
| 139 | else |
| 140 | errstring = build_string ("undocumented error code"); |
| 141 | |
| 142 | /* System error messages are capitalized. Downcase the initial |
| 143 | unless it is followed by a slash. */ |
| 144 | if (XSTRING (errstring)->data[1] != '/') |
| 145 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); |
| 146 | |
| 147 | while (1) |
| 148 | Fsignal (Qfile_error, |
| 149 | Fcons (build_string (string), Fcons (errstring, data))); |
| 150 | } |
| 151 | |
| 152 | close_file_unwind (fd) |
| 153 | Lisp_Object fd; |
| 154 | { |
| 155 | close (XFASTINT (fd)); |
| 156 | } |
| 157 | \f |
| 158 | Lisp_Object Qexpand_file_name; |
| 159 | Lisp_Object Qdirectory_file_name; |
| 160 | Lisp_Object Qfile_name_directory; |
| 161 | Lisp_Object Qfile_name_nondirectory; |
| 162 | Lisp_Object Qunhandled_file_name_directory; |
| 163 | Lisp_Object Qfile_name_as_directory; |
| 164 | Lisp_Object Qcopy_file; |
| 165 | Lisp_Object Qmake_directory; |
| 166 | Lisp_Object Qdelete_directory; |
| 167 | Lisp_Object Qdelete_file; |
| 168 | Lisp_Object Qrename_file; |
| 169 | Lisp_Object Qadd_name_to_file; |
| 170 | Lisp_Object Qmake_symbolic_link; |
| 171 | Lisp_Object Qfile_exists_p; |
| 172 | Lisp_Object Qfile_executable_p; |
| 173 | Lisp_Object Qfile_readable_p; |
| 174 | Lisp_Object Qfile_symlink_p; |
| 175 | Lisp_Object Qfile_writable_p; |
| 176 | Lisp_Object Qfile_directory_p; |
| 177 | Lisp_Object Qfile_accessible_directory_p; |
| 178 | Lisp_Object Qfile_modes; |
| 179 | Lisp_Object Qset_file_modes; |
| 180 | Lisp_Object Qfile_newer_than_file_p; |
| 181 | Lisp_Object Qinsert_file_contents; |
| 182 | Lisp_Object Qwrite_region; |
| 183 | Lisp_Object Qverify_visited_file_modtime; |
| 184 | Lisp_Object Qset_visited_file_modtime; |
| 185 | |
| 186 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 1, 1, 0, |
| 187 | "Return FILENAME's handler function, if its syntax is handled specially.\n\ |
| 188 | Otherwise, return nil.\n\ |
| 189 | A file name is handled if one of the regular expressions in\n\ |
| 190 | `file-name-handler-alist' matches it.") |
| 191 | (filename) |
| 192 | Lisp_Object filename; |
| 193 | { |
| 194 | /* This function must not munge the match data. */ |
| 195 | Lisp_Object chain; |
| 196 | |
| 197 | CHECK_STRING (filename, 0); |
| 198 | |
| 199 | for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons; |
| 200 | chain = XCONS (chain)->cdr) |
| 201 | { |
| 202 | Lisp_Object elt; |
| 203 | elt = XCONS (chain)->car; |
| 204 | if (XTYPE (elt) == Lisp_Cons) |
| 205 | { |
| 206 | Lisp_Object string; |
| 207 | string = XCONS (elt)->car; |
| 208 | if (XTYPE (string) == Lisp_String |
| 209 | && fast_string_match (string, filename) >= 0) |
| 210 | return XCONS (elt)->cdr; |
| 211 | } |
| 212 | |
| 213 | QUIT; |
| 214 | } |
| 215 | return Qnil; |
| 216 | } |
| 217 | \f |
| 218 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
| 219 | 1, 1, 0, |
| 220 | "Return the directory component in file name NAME.\n\ |
| 221 | Return nil if NAME does not include a directory.\n\ |
| 222 | Otherwise return a directory spec.\n\ |
| 223 | Given a Unix syntax file name, returns a string ending in slash;\n\ |
| 224 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") |
| 225 | (file) |
| 226 | Lisp_Object file; |
| 227 | { |
| 228 | register unsigned char *beg; |
| 229 | register unsigned char *p; |
| 230 | Lisp_Object handler; |
| 231 | |
| 232 | CHECK_STRING (file, 0); |
| 233 | |
| 234 | /* If the file name has special constructs in it, |
| 235 | call the corresponding file handler. */ |
| 236 | handler = Ffind_file_name_handler (file); |
| 237 | if (!NILP (handler)) |
| 238 | return call2 (handler, Qfile_name_directory, file); |
| 239 | |
| 240 | beg = XSTRING (file)->data; |
| 241 | p = beg + XSTRING (file)->size; |
| 242 | |
| 243 | while (p != beg && p[-1] != '/' |
| 244 | #ifdef VMS |
| 245 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 246 | #endif /* VMS */ |
| 247 | ) p--; |
| 248 | |
| 249 | if (p == beg) |
| 250 | return Qnil; |
| 251 | return make_string (beg, p - beg); |
| 252 | } |
| 253 | |
| 254 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, |
| 255 | 1, 1, 0, |
| 256 | "Return file name NAME sans its directory.\n\ |
| 257 | For example, in a Unix-syntax file name,\n\ |
| 258 | this is everything after the last slash,\n\ |
| 259 | or the entire name if it contains no slash.") |
| 260 | (file) |
| 261 | Lisp_Object file; |
| 262 | { |
| 263 | register unsigned char *beg, *p, *end; |
| 264 | Lisp_Object handler; |
| 265 | |
| 266 | CHECK_STRING (file, 0); |
| 267 | |
| 268 | /* If the file name has special constructs in it, |
| 269 | call the corresponding file handler. */ |
| 270 | handler = Ffind_file_name_handler (file); |
| 271 | if (!NILP (handler)) |
| 272 | return call2 (handler, Qfile_name_nondirectory, file); |
| 273 | |
| 274 | beg = XSTRING (file)->data; |
| 275 | end = p = beg + XSTRING (file)->size; |
| 276 | |
| 277 | while (p != beg && p[-1] != '/' |
| 278 | #ifdef VMS |
| 279 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 280 | #endif /* VMS */ |
| 281 | ) p--; |
| 282 | |
| 283 | return make_string (p, end - p); |
| 284 | } |
| 285 | |
| 286 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, Sunhandled_file_name_directory, 1, 1, 0, |
| 287 | "Return a directly usable directory name somehow associated with FILENAME.\n\ |
| 288 | A `directly usable' directory name is one that may be used without the\n\ |
| 289 | intervention of any file handler.\n\ |
| 290 | If FILENAME is a directly usable file itself, return\n\ |
| 291 | (file-name-directory FILENAME).\n\ |
| 292 | The `call-process' and `start-process' functions use this function to\n\ |
| 293 | get a current directory to run processes in.") |
| 294 | (filename) |
| 295 | Lisp_Object filename; |
| 296 | { |
| 297 | Lisp_Object handler; |
| 298 | |
| 299 | /* If the file name has special constructs in it, |
| 300 | call the corresponding file handler. */ |
| 301 | handler = Ffind_file_name_handler (filename); |
| 302 | if (!NILP (handler)) |
| 303 | return call2 (handler, Qunhandled_file_name_directory, filename); |
| 304 | |
| 305 | return Ffile_name_directory (filename); |
| 306 | } |
| 307 | |
| 308 | \f |
| 309 | char * |
| 310 | file_name_as_directory (out, in) |
| 311 | char *out, *in; |
| 312 | { |
| 313 | int size = strlen (in) - 1; |
| 314 | |
| 315 | strcpy (out, in); |
| 316 | |
| 317 | #ifdef VMS |
| 318 | /* Is it already a directory string? */ |
| 319 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') |
| 320 | return out; |
| 321 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ |
| 322 | else if (! index (in, '/') |
| 323 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) |
| 324 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) |
| 325 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) |
| 326 | || ! strncmp (&in[size - 5], ".dir", 4)) |
| 327 | && (in[size - 1] == '.' || in[size - 1] == ';') |
| 328 | && in[size] == '1'))) |
| 329 | { |
| 330 | register char *p, *dot; |
| 331 | char brack; |
| 332 | |
| 333 | /* x.dir -> [.x] |
| 334 | dir:x.dir --> dir:[x] |
| 335 | dir:[x]y.dir --> dir:[x.y] */ |
| 336 | p = in + size; |
| 337 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; |
| 338 | if (p != in) |
| 339 | { |
| 340 | strncpy (out, in, p - in); |
| 341 | out[p - in] = '\0'; |
| 342 | if (*p == ':') |
| 343 | { |
| 344 | brack = ']'; |
| 345 | strcat (out, ":["); |
| 346 | } |
| 347 | else |
| 348 | { |
| 349 | brack = *p; |
| 350 | strcat (out, "."); |
| 351 | } |
| 352 | p++; |
| 353 | } |
| 354 | else |
| 355 | { |
| 356 | brack = ']'; |
| 357 | strcpy (out, "[."); |
| 358 | } |
| 359 | dot = index (p, '.'); |
| 360 | if (dot) |
| 361 | { |
| 362 | /* blindly remove any extension */ |
| 363 | size = strlen (out) + (dot - p); |
| 364 | strncat (out, p, dot - p); |
| 365 | } |
| 366 | else |
| 367 | { |
| 368 | strcat (out, p); |
| 369 | size = strlen (out); |
| 370 | } |
| 371 | out[size++] = brack; |
| 372 | out[size] = '\0'; |
| 373 | } |
| 374 | #else /* not VMS */ |
| 375 | /* For Unix syntax, Append a slash if necessary */ |
| 376 | if (out[size] != '/') |
| 377 | strcat (out, "/"); |
| 378 | #endif /* not VMS */ |
| 379 | return out; |
| 380 | } |
| 381 | |
| 382 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
| 383 | Sfile_name_as_directory, 1, 1, 0, |
| 384 | "Return a string representing file FILENAME interpreted as a directory.\n\ |
| 385 | This operation exists because a directory is also a file, but its name as\n\ |
| 386 | a directory is different from its name as a file.\n\ |
| 387 | The result can be used as the value of `default-directory'\n\ |
| 388 | or passed as second argument to `expand-file-name'.\n\ |
| 389 | For a Unix-syntax file name, just appends a slash.\n\ |
| 390 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") |
| 391 | (file) |
| 392 | Lisp_Object file; |
| 393 | { |
| 394 | char *buf; |
| 395 | Lisp_Object handler; |
| 396 | |
| 397 | CHECK_STRING (file, 0); |
| 398 | if (NILP (file)) |
| 399 | return Qnil; |
| 400 | |
| 401 | /* If the file name has special constructs in it, |
| 402 | call the corresponding file handler. */ |
| 403 | handler = Ffind_file_name_handler (file); |
| 404 | if (!NILP (handler)) |
| 405 | return call2 (handler, Qfile_name_as_directory, file); |
| 406 | |
| 407 | buf = (char *) alloca (XSTRING (file)->size + 10); |
| 408 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); |
| 409 | } |
| 410 | \f |
| 411 | /* |
| 412 | * Convert from directory name to filename. |
| 413 | * On VMS: |
| 414 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 |
| 415 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 |
| 416 | * On UNIX, it's simple: just make sure there is a terminating / |
| 417 | |
| 418 | * Value is nonzero if the string output is different from the input. |
| 419 | */ |
| 420 | |
| 421 | directory_file_name (src, dst) |
| 422 | char *src, *dst; |
| 423 | { |
| 424 | long slen; |
| 425 | #ifdef VMS |
| 426 | long rlen; |
| 427 | char * ptr, * rptr; |
| 428 | char bracket; |
| 429 | struct FAB fab = cc$rms_fab; |
| 430 | struct NAM nam = cc$rms_nam; |
| 431 | char esa[NAM$C_MAXRSS]; |
| 432 | #endif /* VMS */ |
| 433 | |
| 434 | slen = strlen (src); |
| 435 | #ifdef VMS |
| 436 | if (! index (src, '/') |
| 437 | && (src[slen - 1] == ']' |
| 438 | || src[slen - 1] == ':' |
| 439 | || src[slen - 1] == '>')) |
| 440 | { |
| 441 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ |
| 442 | fab.fab$l_fna = src; |
| 443 | fab.fab$b_fns = slen; |
| 444 | fab.fab$l_nam = &nam; |
| 445 | fab.fab$l_fop = FAB$M_NAM; |
| 446 | |
| 447 | nam.nam$l_esa = esa; |
| 448 | nam.nam$b_ess = sizeof esa; |
| 449 | nam.nam$b_nop |= NAM$M_SYNCHK; |
| 450 | |
| 451 | /* We call SYS$PARSE to handle such things as [--] for us. */ |
| 452 | if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL) |
| 453 | { |
| 454 | slen = nam.nam$b_esl; |
| 455 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') |
| 456 | slen -= 2; |
| 457 | esa[slen] = '\0'; |
| 458 | src = esa; |
| 459 | } |
| 460 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 461 | { |
| 462 | /* what about when we have logical_name:???? */ |
| 463 | if (src[slen - 1] == ':') |
| 464 | { /* Xlate logical name and see what we get */ |
| 465 | ptr = strcpy (dst, src); /* upper case for getenv */ |
| 466 | while (*ptr) |
| 467 | { |
| 468 | if ('a' <= *ptr && *ptr <= 'z') |
| 469 | *ptr -= 040; |
| 470 | ptr++; |
| 471 | } |
| 472 | dst[slen - 1] = 0; /* remove colon */ |
| 473 | if (!(src = egetenv (dst))) |
| 474 | return 0; |
| 475 | /* should we jump to the beginning of this procedure? |
| 476 | Good points: allows us to use logical names that xlate |
| 477 | to Unix names, |
| 478 | Bad points: can be a problem if we just translated to a device |
| 479 | name... |
| 480 | For now, I'll punt and always expect VMS names, and hope for |
| 481 | the best! */ |
| 482 | slen = strlen (src); |
| 483 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 484 | { /* no recursion here! */ |
| 485 | strcpy (dst, src); |
| 486 | return 0; |
| 487 | } |
| 488 | } |
| 489 | else |
| 490 | { /* not a directory spec */ |
| 491 | strcpy (dst, src); |
| 492 | return 0; |
| 493 | } |
| 494 | } |
| 495 | bracket = src[slen - 1]; |
| 496 | |
| 497 | /* If bracket is ']' or '>', bracket - 2 is the corresponding |
| 498 | opening bracket. */ |
| 499 | ptr = index (src, bracket - 2); |
| 500 | if (ptr == 0) |
| 501 | { /* no opening bracket */ |
| 502 | strcpy (dst, src); |
| 503 | return 0; |
| 504 | } |
| 505 | if (!(rptr = rindex (src, '.'))) |
| 506 | rptr = ptr; |
| 507 | slen = rptr - src; |
| 508 | strncpy (dst, src, slen); |
| 509 | dst[slen] = '\0'; |
| 510 | if (*rptr == '.') |
| 511 | { |
| 512 | dst[slen++] = bracket; |
| 513 | dst[slen] = '\0'; |
| 514 | } |
| 515 | else |
| 516 | { |
| 517 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), |
| 518 | then translate the device and recurse. */ |
| 519 | if (dst[slen - 1] == ':' |
| 520 | && dst[slen - 2] != ':' /* skip decnet nodes */ |
| 521 | && strcmp(src + slen, "[000000]") == 0) |
| 522 | { |
| 523 | dst[slen - 1] = '\0'; |
| 524 | if ((ptr = egetenv (dst)) |
| 525 | && (rlen = strlen (ptr) - 1) > 0 |
| 526 | && (ptr[rlen] == ']' || ptr[rlen] == '>') |
| 527 | && ptr[rlen - 1] == '.') |
| 528 | { |
| 529 | char * buf = (char *) alloca (strlen (ptr) + 1); |
| 530 | strcpy (buf, ptr); |
| 531 | buf[rlen - 1] = ']'; |
| 532 | buf[rlen] = '\0'; |
| 533 | return directory_file_name (buf, dst); |
| 534 | } |
| 535 | else |
| 536 | dst[slen - 1] = ':'; |
| 537 | } |
| 538 | strcat (dst, "[000000]"); |
| 539 | slen += 8; |
| 540 | } |
| 541 | rptr++; |
| 542 | rlen = strlen (rptr) - 1; |
| 543 | strncat (dst, rptr, rlen); |
| 544 | dst[slen + rlen] = '\0'; |
| 545 | strcat (dst, ".DIR.1"); |
| 546 | return 1; |
| 547 | } |
| 548 | #endif /* VMS */ |
| 549 | /* Process as Unix format: just remove any final slash. |
| 550 | But leave "/" unchanged; do not change it to "". */ |
| 551 | strcpy (dst, src); |
| 552 | if (slen > 1 && dst[slen - 1] == '/') |
| 553 | dst[slen - 1] = 0; |
| 554 | return 1; |
| 555 | } |
| 556 | |
| 557 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
| 558 | 1, 1, 0, |
| 559 | "Returns the file name of the directory named DIR.\n\ |
| 560 | This is the name of the file that holds the data for the directory DIR.\n\ |
| 561 | This operation exists because a directory is also a file, but its name as\n\ |
| 562 | a directory is different from its name as a file.\n\ |
| 563 | In Unix-syntax, this function just removes the final slash.\n\ |
| 564 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ |
| 565 | it returns a file name such as \"[X]Y.DIR.1\".") |
| 566 | (directory) |
| 567 | Lisp_Object directory; |
| 568 | { |
| 569 | char *buf; |
| 570 | Lisp_Object handler; |
| 571 | |
| 572 | CHECK_STRING (directory, 0); |
| 573 | |
| 574 | if (NILP (directory)) |
| 575 | return Qnil; |
| 576 | |
| 577 | /* If the file name has special constructs in it, |
| 578 | call the corresponding file handler. */ |
| 579 | handler = Ffind_file_name_handler (directory); |
| 580 | if (!NILP (handler)) |
| 581 | return call2 (handler, Qdirectory_file_name, directory); |
| 582 | |
| 583 | #ifdef VMS |
| 584 | /* 20 extra chars is insufficient for VMS, since we might perform a |
| 585 | logical name translation. an equivalence string can be up to 255 |
| 586 | chars long, so grab that much extra space... - sss */ |
| 587 | buf = (char *) alloca (XSTRING (directory)->size + 20 + 255); |
| 588 | #else |
| 589 | buf = (char *) alloca (XSTRING (directory)->size + 20); |
| 590 | #endif |
| 591 | directory_file_name (XSTRING (directory)->data, buf); |
| 592 | return build_string (buf); |
| 593 | } |
| 594 | |
| 595 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, |
| 596 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ |
| 597 | The Emacs process number forms part of the result,\n\ |
| 598 | so there is no danger of generating a name being used by another process.") |
| 599 | (prefix) |
| 600 | Lisp_Object prefix; |
| 601 | { |
| 602 | Lisp_Object val; |
| 603 | val = concat2 (prefix, build_string ("XXXXXX")); |
| 604 | mktemp (XSTRING (val)->data); |
| 605 | return val; |
| 606 | } |
| 607 | \f |
| 608 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 609 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 610 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 611 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 612 | the current buffer's value of default-directory is used.\n\ |
| 613 | Path components that are `.' are removed, and \n\ |
| 614 | path components followed by `..' are removed, along with the `..' itself;\n\ |
| 615 | note that these simplifications are done without checking the resulting\n\ |
| 616 | paths in the file system.\n\ |
| 617 | An initial `~/' expands to your home directory.\n\ |
| 618 | An initial `~USER/' expands to USER's home directory.\n\ |
| 619 | See also the function `substitute-in-file-name'.") |
| 620 | (name, defalt) |
| 621 | Lisp_Object name, defalt; |
| 622 | { |
| 623 | unsigned char *nm; |
| 624 | |
| 625 | register unsigned char *newdir, *p, *o; |
| 626 | int tlen; |
| 627 | unsigned char *target; |
| 628 | struct passwd *pw; |
| 629 | #ifdef VMS |
| 630 | unsigned char * colon = 0; |
| 631 | unsigned char * close = 0; |
| 632 | unsigned char * slash = 0; |
| 633 | unsigned char * brack = 0; |
| 634 | int lbrack = 0, rbrack = 0; |
| 635 | int dots = 0; |
| 636 | #endif /* VMS */ |
| 637 | Lisp_Object handler; |
| 638 | |
| 639 | CHECK_STRING (name, 0); |
| 640 | |
| 641 | /* If the file name has special constructs in it, |
| 642 | call the corresponding file handler. */ |
| 643 | handler = Ffind_file_name_handler (name); |
| 644 | if (!NILP (handler)) |
| 645 | return call3 (handler, Qexpand_file_name, name, defalt); |
| 646 | |
| 647 | /* Use the buffer's default-directory if DEFALT is omitted. */ |
| 648 | if (NILP (defalt)) |
| 649 | defalt = current_buffer->directory; |
| 650 | CHECK_STRING (defalt, 1); |
| 651 | |
| 652 | /* Make sure DEFALT is properly expanded. |
| 653 | It would be better to do this down below where we actually use |
| 654 | defalt. Unfortunately, calling Fexpand_file_name recursively |
| 655 | could invoke GC, and the strings might be relocated. This would |
| 656 | be annoying because we have pointers into strings lying around |
| 657 | that would need adjusting, and people would add new pointers to |
| 658 | the code and forget to adjust them, resulting in intermittent bugs. |
| 659 | Putting this call here avoids all that crud. |
| 660 | |
| 661 | The EQ test avoids infinite recursion. */ |
| 662 | if (! NILP (defalt) && !EQ (defalt, name) |
| 663 | /* This saves time in a common case. */ |
| 664 | && XSTRING (defalt)->data[0] != '/') |
| 665 | { |
| 666 | struct gcpro gcpro1; |
| 667 | |
| 668 | GCPRO1 (name); |
| 669 | defalt = Fexpand_file_name (defalt, Qnil); |
| 670 | UNGCPRO; |
| 671 | } |
| 672 | |
| 673 | #ifdef VMS |
| 674 | /* Filenames on VMS are always upper case. */ |
| 675 | name = Fupcase (name); |
| 676 | #endif |
| 677 | |
| 678 | nm = XSTRING (name)->data; |
| 679 | |
| 680 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 681 | If no /./ or /../ we can return right away. */ |
| 682 | if ( |
| 683 | nm[0] == '/' |
| 684 | #ifdef VMS |
| 685 | || index (nm, ':') |
| 686 | #endif /* VMS */ |
| 687 | ) |
| 688 | { |
| 689 | /* If it turns out that the filename we want to return is just a |
| 690 | suffix of FILENAME, we don't need to go through and edit |
| 691 | things; we just need to construct a new string using data |
| 692 | starting at the middle of FILENAME. If we set lose to a |
| 693 | non-zero value, that means we've discovered that we can't do |
| 694 | that cool trick. */ |
| 695 | int lose = 0; |
| 696 | |
| 697 | p = nm; |
| 698 | while (*p) |
| 699 | { |
| 700 | /* Since we know the path is absolute, we can assume that each |
| 701 | element starts with a "/". */ |
| 702 | |
| 703 | /* "//" anywhere isn't necessarily hairy; we just start afresh |
| 704 | with the second slash. */ |
| 705 | if (p[0] == '/' && p[1] == '/' |
| 706 | #ifdef APOLLO |
| 707 | /* // at start of filename is meaningful on Apollo system */ |
| 708 | && nm != p |
| 709 | #endif /* APOLLO */ |
| 710 | ) |
| 711 | nm = p + 1; |
| 712 | |
| 713 | /* "~" is hairy as the start of any path element. */ |
| 714 | if (p[0] == '/' && p[1] == '~') |
| 715 | nm = p + 1, lose = 1; |
| 716 | |
| 717 | /* "." and ".." are hairy. */ |
| 718 | if (p[0] == '/' |
| 719 | && p[1] == '.' |
| 720 | && (p[2] == '/' |
| 721 | || p[2] == 0 |
| 722 | || (p[2] == '.' && (p[3] == '/' |
| 723 | || p[3] == 0)))) |
| 724 | lose = 1; |
| 725 | #ifdef VMS |
| 726 | if (p[0] == '\\') |
| 727 | lose = 1; |
| 728 | if (p[0] == '/') { |
| 729 | /* if dev:[dir]/, move nm to / */ |
| 730 | if (!slash && p > nm && (brack || colon)) { |
| 731 | nm = (brack ? brack + 1 : colon + 1); |
| 732 | lbrack = rbrack = 0; |
| 733 | brack = 0; |
| 734 | colon = 0; |
| 735 | } |
| 736 | slash = p; |
| 737 | } |
| 738 | if (p[0] == '-') |
| 739 | #ifndef VMS4_4 |
| 740 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 741 | if (lbrack == rbrack) |
| 742 | { |
| 743 | if (dots < 2) /* this is to allow negative version numbers */ |
| 744 | p[0] = '_'; |
| 745 | } |
| 746 | else |
| 747 | #endif /* VMS4_4 */ |
| 748 | if (lbrack > rbrack && |
| 749 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 750 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 751 | lose = 1; |
| 752 | #ifndef VMS4_4 |
| 753 | else |
| 754 | p[0] = '_'; |
| 755 | #endif /* VMS4_4 */ |
| 756 | /* count open brackets, reset close bracket pointer */ |
| 757 | if (p[0] == '[' || p[0] == '<') |
| 758 | lbrack++, brack = 0; |
| 759 | /* count close brackets, set close bracket pointer */ |
| 760 | if (p[0] == ']' || p[0] == '>') |
| 761 | rbrack++, brack = p; |
| 762 | /* detect ][ or >< */ |
| 763 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 764 | lose = 1; |
| 765 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 766 | nm = p + 1, lose = 1; |
| 767 | if (p[0] == ':' && (colon || slash)) |
| 768 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 769 | if (brack) |
| 770 | { |
| 771 | nm = brack + 1; |
| 772 | brack = 0; |
| 773 | } |
| 774 | /* if /pathname/dev:, move nm to dev: */ |
| 775 | else if (slash) |
| 776 | nm = slash + 1; |
| 777 | /* if node::dev:, move colon following dev */ |
| 778 | else if (colon && colon[-1] == ':') |
| 779 | colon = p; |
| 780 | /* if dev1:dev2:, move nm to dev2: */ |
| 781 | else if (colon && colon[-1] != ':') |
| 782 | { |
| 783 | nm = colon + 1; |
| 784 | colon = 0; |
| 785 | } |
| 786 | if (p[0] == ':' && !colon) |
| 787 | { |
| 788 | if (p[1] == ':') |
| 789 | p++; |
| 790 | colon = p; |
| 791 | } |
| 792 | if (lbrack == rbrack) |
| 793 | if (p[0] == ';') |
| 794 | dots = 2; |
| 795 | else if (p[0] == '.') |
| 796 | dots++; |
| 797 | #endif /* VMS */ |
| 798 | p++; |
| 799 | } |
| 800 | if (!lose) |
| 801 | { |
| 802 | #ifdef VMS |
| 803 | if (index (nm, '/')) |
| 804 | return build_string (sys_translate_unix (nm)); |
| 805 | #endif /* VMS */ |
| 806 | if (nm == XSTRING (name)->data) |
| 807 | return name; |
| 808 | return build_string (nm); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | /* Now determine directory to start with and put it in newdir */ |
| 813 | |
| 814 | newdir = 0; |
| 815 | |
| 816 | if (nm[0] == '~') /* prefix ~ */ |
| 817 | { |
| 818 | if (nm[1] == '/' |
| 819 | #ifdef VMS |
| 820 | || nm[1] == ':' |
| 821 | #endif /* VMS */ |
| 822 | || nm[1] == 0) /* ~ by itself */ |
| 823 | { |
| 824 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 825 | newdir = (unsigned char *) ""; |
| 826 | nm++; |
| 827 | #ifdef VMS |
| 828 | nm++; /* Don't leave the slash in nm. */ |
| 829 | #endif /* VMS */ |
| 830 | } |
| 831 | else /* ~user/filename */ |
| 832 | { |
| 833 | for (p = nm; *p && (*p != '/' |
| 834 | #ifdef VMS |
| 835 | && *p != ':' |
| 836 | #endif /* VMS */ |
| 837 | ); p++); |
| 838 | o = (unsigned char *) alloca (p - nm + 1); |
| 839 | bcopy ((char *) nm, o, p - nm); |
| 840 | o [p - nm] = 0; |
| 841 | |
| 842 | pw = (struct passwd *) getpwnam (o + 1); |
| 843 | if (pw) |
| 844 | { |
| 845 | newdir = (unsigned char *) pw -> pw_dir; |
| 846 | #ifdef VMS |
| 847 | nm = p + 1; /* skip the terminator */ |
| 848 | #else |
| 849 | nm = p; |
| 850 | #endif /* VMS */ |
| 851 | } |
| 852 | |
| 853 | /* If we don't find a user of that name, leave the name |
| 854 | unchanged; don't move nm forward to p. */ |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | if (nm[0] != '/' |
| 859 | #ifdef VMS |
| 860 | && !index (nm, ':') |
| 861 | #endif /* not VMS */ |
| 862 | && !newdir) |
| 863 | { |
| 864 | newdir = XSTRING (defalt)->data; |
| 865 | } |
| 866 | |
| 867 | if (newdir != 0) |
| 868 | { |
| 869 | /* Get rid of any slash at the end of newdir. */ |
| 870 | int length = strlen (newdir); |
| 871 | /* Adding `length > 1 &&' makes ~ expand into / when homedir |
| 872 | is the root dir. People disagree about whether that is right. |
| 873 | Anyway, we can't take the risk of this change now. */ |
| 874 | if (newdir[length - 1] == '/') |
| 875 | { |
| 876 | unsigned char *temp = (unsigned char *) alloca (length); |
| 877 | bcopy (newdir, temp, length - 1); |
| 878 | temp[length - 1] = 0; |
| 879 | newdir = temp; |
| 880 | } |
| 881 | tlen = length + 1; |
| 882 | } |
| 883 | else |
| 884 | tlen = 0; |
| 885 | |
| 886 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 887 | tlen += strlen (nm) + 1; |
| 888 | target = (unsigned char *) alloca (tlen); |
| 889 | *target = 0; |
| 890 | |
| 891 | if (newdir) |
| 892 | { |
| 893 | #ifndef VMS |
| 894 | if (nm[0] == 0 || nm[0] == '/') |
| 895 | strcpy (target, newdir); |
| 896 | else |
| 897 | #endif |
| 898 | file_name_as_directory (target, newdir); |
| 899 | } |
| 900 | |
| 901 | strcat (target, nm); |
| 902 | #ifdef VMS |
| 903 | if (index (target, '/')) |
| 904 | strcpy (target, sys_translate_unix (target)); |
| 905 | #endif /* VMS */ |
| 906 | |
| 907 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
| 908 | |
| 909 | p = target; |
| 910 | o = target; |
| 911 | |
| 912 | while (*p) |
| 913 | { |
| 914 | #ifdef VMS |
| 915 | if (*p != ']' && *p != '>' && *p != '-') |
| 916 | { |
| 917 | if (*p == '\\') |
| 918 | p++; |
| 919 | *o++ = *p++; |
| 920 | } |
| 921 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 922 | /* brackets are offset from each other by 2 */ |
| 923 | { |
| 924 | p += 2; |
| 925 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 926 | /* convert [foo][bar] to [bar] */ |
| 927 | while (o[-1] != '[' && o[-1] != '<') |
| 928 | o--; |
| 929 | else if (*p == '-' && *o != '.') |
| 930 | *--p = '.'; |
| 931 | } |
| 932 | else if (p[0] == '-' && o[-1] == '.' && |
| 933 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 934 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 935 | { |
| 936 | do |
| 937 | o--; |
| 938 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 939 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 940 | p += 2; |
| 941 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 942 | p++, o--; |
| 943 | /* else [foo.-] ==> [-] */ |
| 944 | } |
| 945 | else |
| 946 | { |
| 947 | #ifndef VMS4_4 |
| 948 | if (*p == '-' && |
| 949 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 950 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 951 | *p = '_'; |
| 952 | #endif /* VMS4_4 */ |
| 953 | *o++ = *p++; |
| 954 | } |
| 955 | #else /* not VMS */ |
| 956 | if (*p != '/') |
| 957 | { |
| 958 | *o++ = *p++; |
| 959 | } |
| 960 | else if (!strncmp (p, "//", 2) |
| 961 | #ifdef APOLLO |
| 962 | /* // at start of filename is meaningful in Apollo system */ |
| 963 | && o != target |
| 964 | #endif /* APOLLO */ |
| 965 | ) |
| 966 | { |
| 967 | o = target; |
| 968 | p++; |
| 969 | } |
| 970 | else if (p[0] == '/' |
| 971 | && p[1] == '.' |
| 972 | && (p[2] == '/' |
| 973 | || p[2] == 0)) |
| 974 | { |
| 975 | /* If "/." is the entire filename, keep the "/". Otherwise, |
| 976 | just delete the whole "/.". */ |
| 977 | if (o == target && p[2] == '\0') |
| 978 | *o++ = *p; |
| 979 | p += 2; |
| 980 | } |
| 981 | else if (!strncmp (p, "/..", 3) |
| 982 | /* `/../' is the "superroot" on certain file systems. */ |
| 983 | && o != target |
| 984 | && (p[3] == '/' || p[3] == 0)) |
| 985 | { |
| 986 | while (o != target && *--o != '/') |
| 987 | ; |
| 988 | #ifdef APOLLO |
| 989 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 990 | ++o; |
| 991 | else |
| 992 | #endif /* APOLLO */ |
| 993 | if (o == target && *o == '/') |
| 994 | ++o; |
| 995 | p += 3; |
| 996 | } |
| 997 | else |
| 998 | { |
| 999 | *o++ = *p++; |
| 1000 | } |
| 1001 | #endif /* not VMS */ |
| 1002 | } |
| 1003 | |
| 1004 | return make_string (target, o - target); |
| 1005 | } |
| 1006 | #if 0 |
| 1007 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. |
| 1008 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 1009 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 1010 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 1011 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 1012 | the current buffer's value of default-directory is used.\n\ |
| 1013 | Filenames containing `.' or `..' as components are simplified;\n\ |
| 1014 | initial `~/' expands to your home directory.\n\ |
| 1015 | See also the function `substitute-in-file-name'.") |
| 1016 | (name, defalt) |
| 1017 | Lisp_Object name, defalt; |
| 1018 | { |
| 1019 | unsigned char *nm; |
| 1020 | |
| 1021 | register unsigned char *newdir, *p, *o; |
| 1022 | int tlen; |
| 1023 | unsigned char *target; |
| 1024 | struct passwd *pw; |
| 1025 | int lose; |
| 1026 | #ifdef VMS |
| 1027 | unsigned char * colon = 0; |
| 1028 | unsigned char * close = 0; |
| 1029 | unsigned char * slash = 0; |
| 1030 | unsigned char * brack = 0; |
| 1031 | int lbrack = 0, rbrack = 0; |
| 1032 | int dots = 0; |
| 1033 | #endif /* VMS */ |
| 1034 | |
| 1035 | CHECK_STRING (name, 0); |
| 1036 | |
| 1037 | #ifdef VMS |
| 1038 | /* Filenames on VMS are always upper case. */ |
| 1039 | name = Fupcase (name); |
| 1040 | #endif |
| 1041 | |
| 1042 | nm = XSTRING (name)->data; |
| 1043 | |
| 1044 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 1045 | If no /./ or /../ we can return right away. */ |
| 1046 | if ( |
| 1047 | nm[0] == '/' |
| 1048 | #ifdef VMS |
| 1049 | || index (nm, ':') |
| 1050 | #endif /* VMS */ |
| 1051 | ) |
| 1052 | { |
| 1053 | p = nm; |
| 1054 | lose = 0; |
| 1055 | while (*p) |
| 1056 | { |
| 1057 | if (p[0] == '/' && p[1] == '/' |
| 1058 | #ifdef APOLLO |
| 1059 | /* // at start of filename is meaningful on Apollo system */ |
| 1060 | && nm != p |
| 1061 | #endif /* APOLLO */ |
| 1062 | ) |
| 1063 | nm = p + 1; |
| 1064 | if (p[0] == '/' && p[1] == '~') |
| 1065 | nm = p + 1, lose = 1; |
| 1066 | if (p[0] == '/' && p[1] == '.' |
| 1067 | && (p[2] == '/' || p[2] == 0 |
| 1068 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) |
| 1069 | lose = 1; |
| 1070 | #ifdef VMS |
| 1071 | if (p[0] == '\\') |
| 1072 | lose = 1; |
| 1073 | if (p[0] == '/') { |
| 1074 | /* if dev:[dir]/, move nm to / */ |
| 1075 | if (!slash && p > nm && (brack || colon)) { |
| 1076 | nm = (brack ? brack + 1 : colon + 1); |
| 1077 | lbrack = rbrack = 0; |
| 1078 | brack = 0; |
| 1079 | colon = 0; |
| 1080 | } |
| 1081 | slash = p; |
| 1082 | } |
| 1083 | if (p[0] == '-') |
| 1084 | #ifndef VMS4_4 |
| 1085 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 1086 | if (lbrack == rbrack) |
| 1087 | { |
| 1088 | if (dots < 2) /* this is to allow negative version numbers */ |
| 1089 | p[0] = '_'; |
| 1090 | } |
| 1091 | else |
| 1092 | #endif /* VMS4_4 */ |
| 1093 | if (lbrack > rbrack && |
| 1094 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 1095 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 1096 | lose = 1; |
| 1097 | #ifndef VMS4_4 |
| 1098 | else |
| 1099 | p[0] = '_'; |
| 1100 | #endif /* VMS4_4 */ |
| 1101 | /* count open brackets, reset close bracket pointer */ |
| 1102 | if (p[0] == '[' || p[0] == '<') |
| 1103 | lbrack++, brack = 0; |
| 1104 | /* count close brackets, set close bracket pointer */ |
| 1105 | if (p[0] == ']' || p[0] == '>') |
| 1106 | rbrack++, brack = p; |
| 1107 | /* detect ][ or >< */ |
| 1108 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 1109 | lose = 1; |
| 1110 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 1111 | nm = p + 1, lose = 1; |
| 1112 | if (p[0] == ':' && (colon || slash)) |
| 1113 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 1114 | if (brack) |
| 1115 | { |
| 1116 | nm = brack + 1; |
| 1117 | brack = 0; |
| 1118 | } |
| 1119 | /* if /pathname/dev:, move nm to dev: */ |
| 1120 | else if (slash) |
| 1121 | nm = slash + 1; |
| 1122 | /* if node::dev:, move colon following dev */ |
| 1123 | else if (colon && colon[-1] == ':') |
| 1124 | colon = p; |
| 1125 | /* if dev1:dev2:, move nm to dev2: */ |
| 1126 | else if (colon && colon[-1] != ':') |
| 1127 | { |
| 1128 | nm = colon + 1; |
| 1129 | colon = 0; |
| 1130 | } |
| 1131 | if (p[0] == ':' && !colon) |
| 1132 | { |
| 1133 | if (p[1] == ':') |
| 1134 | p++; |
| 1135 | colon = p; |
| 1136 | } |
| 1137 | if (lbrack == rbrack) |
| 1138 | if (p[0] == ';') |
| 1139 | dots = 2; |
| 1140 | else if (p[0] == '.') |
| 1141 | dots++; |
| 1142 | #endif /* VMS */ |
| 1143 | p++; |
| 1144 | } |
| 1145 | if (!lose) |
| 1146 | { |
| 1147 | #ifdef VMS |
| 1148 | if (index (nm, '/')) |
| 1149 | return build_string (sys_translate_unix (nm)); |
| 1150 | #endif /* VMS */ |
| 1151 | if (nm == XSTRING (name)->data) |
| 1152 | return name; |
| 1153 | return build_string (nm); |
| 1154 | } |
| 1155 | } |
| 1156 | |
| 1157 | /* Now determine directory to start with and put it in NEWDIR */ |
| 1158 | |
| 1159 | newdir = 0; |
| 1160 | |
| 1161 | if (nm[0] == '~') /* prefix ~ */ |
| 1162 | if (nm[1] == '/' |
| 1163 | #ifdef VMS |
| 1164 | || nm[1] == ':' |
| 1165 | #endif /* VMS */ |
| 1166 | || nm[1] == 0)/* ~/filename */ |
| 1167 | { |
| 1168 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 1169 | newdir = (unsigned char *) ""; |
| 1170 | nm++; |
| 1171 | #ifdef VMS |
| 1172 | nm++; /* Don't leave the slash in nm. */ |
| 1173 | #endif /* VMS */ |
| 1174 | } |
| 1175 | else /* ~user/filename */ |
| 1176 | { |
| 1177 | /* Get past ~ to user */ |
| 1178 | unsigned char *user = nm + 1; |
| 1179 | /* Find end of name. */ |
| 1180 | unsigned char *ptr = (unsigned char *) index (user, '/'); |
| 1181 | int len = ptr ? ptr - user : strlen (user); |
| 1182 | #ifdef VMS |
| 1183 | unsigned char *ptr1 = index (user, ':'); |
| 1184 | if (ptr1 != 0 && ptr1 - user < len) |
| 1185 | len = ptr1 - user; |
| 1186 | #endif /* VMS */ |
| 1187 | /* Copy the user name into temp storage. */ |
| 1188 | o = (unsigned char *) alloca (len + 1); |
| 1189 | bcopy ((char *) user, o, len); |
| 1190 | o[len] = 0; |
| 1191 | |
| 1192 | /* Look up the user name. */ |
| 1193 | pw = (struct passwd *) getpwnam (o + 1); |
| 1194 | if (!pw) |
| 1195 | error ("\"%s\" isn't a registered user", o + 1); |
| 1196 | |
| 1197 | newdir = (unsigned char *) pw->pw_dir; |
| 1198 | |
| 1199 | /* Discard the user name from NM. */ |
| 1200 | nm += len; |
| 1201 | } |
| 1202 | |
| 1203 | if (nm[0] != '/' |
| 1204 | #ifdef VMS |
| 1205 | && !index (nm, ':') |
| 1206 | #endif /* not VMS */ |
| 1207 | && !newdir) |
| 1208 | { |
| 1209 | if (NILP (defalt)) |
| 1210 | defalt = current_buffer->directory; |
| 1211 | CHECK_STRING (defalt, 1); |
| 1212 | newdir = XSTRING (defalt)->data; |
| 1213 | } |
| 1214 | |
| 1215 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1216 | |
| 1217 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; |
| 1218 | target = (unsigned char *) alloca (tlen); |
| 1219 | *target = 0; |
| 1220 | |
| 1221 | if (newdir) |
| 1222 | { |
| 1223 | #ifndef VMS |
| 1224 | if (nm[0] == 0 || nm[0] == '/') |
| 1225 | strcpy (target, newdir); |
| 1226 | else |
| 1227 | #endif |
| 1228 | file_name_as_directory (target, newdir); |
| 1229 | } |
| 1230 | |
| 1231 | strcat (target, nm); |
| 1232 | #ifdef VMS |
| 1233 | if (index (target, '/')) |
| 1234 | strcpy (target, sys_translate_unix (target)); |
| 1235 | #endif /* VMS */ |
| 1236 | |
| 1237 | /* Now canonicalize by removing /. and /foo/.. if they appear */ |
| 1238 | |
| 1239 | p = target; |
| 1240 | o = target; |
| 1241 | |
| 1242 | while (*p) |
| 1243 | { |
| 1244 | #ifdef VMS |
| 1245 | if (*p != ']' && *p != '>' && *p != '-') |
| 1246 | { |
| 1247 | if (*p == '\\') |
| 1248 | p++; |
| 1249 | *o++ = *p++; |
| 1250 | } |
| 1251 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 1252 | /* brackets are offset from each other by 2 */ |
| 1253 | { |
| 1254 | p += 2; |
| 1255 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 1256 | /* convert [foo][bar] to [bar] */ |
| 1257 | while (o[-1] != '[' && o[-1] != '<') |
| 1258 | o--; |
| 1259 | else if (*p == '-' && *o != '.') |
| 1260 | *--p = '.'; |
| 1261 | } |
| 1262 | else if (p[0] == '-' && o[-1] == '.' && |
| 1263 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 1264 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 1265 | { |
| 1266 | do |
| 1267 | o--; |
| 1268 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 1269 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 1270 | p += 2; |
| 1271 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 1272 | p++, o--; |
| 1273 | /* else [foo.-] ==> [-] */ |
| 1274 | } |
| 1275 | else |
| 1276 | { |
| 1277 | #ifndef VMS4_4 |
| 1278 | if (*p == '-' && |
| 1279 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 1280 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 1281 | *p = '_'; |
| 1282 | #endif /* VMS4_4 */ |
| 1283 | *o++ = *p++; |
| 1284 | } |
| 1285 | #else /* not VMS */ |
| 1286 | if (*p != '/') |
| 1287 | { |
| 1288 | *o++ = *p++; |
| 1289 | } |
| 1290 | else if (!strncmp (p, "//", 2) |
| 1291 | #ifdef APOLLO |
| 1292 | /* // at start of filename is meaningful in Apollo system */ |
| 1293 | && o != target |
| 1294 | #endif /* APOLLO */ |
| 1295 | ) |
| 1296 | { |
| 1297 | o = target; |
| 1298 | p++; |
| 1299 | } |
| 1300 | else if (p[0] == '/' && p[1] == '.' && |
| 1301 | (p[2] == '/' || p[2] == 0)) |
| 1302 | p += 2; |
| 1303 | else if (!strncmp (p, "/..", 3) |
| 1304 | /* `/../' is the "superroot" on certain file systems. */ |
| 1305 | && o != target |
| 1306 | && (p[3] == '/' || p[3] == 0)) |
| 1307 | { |
| 1308 | while (o != target && *--o != '/') |
| 1309 | ; |
| 1310 | #ifdef APOLLO |
| 1311 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 1312 | ++o; |
| 1313 | else |
| 1314 | #endif /* APOLLO */ |
| 1315 | if (o == target && *o == '/') |
| 1316 | ++o; |
| 1317 | p += 3; |
| 1318 | } |
| 1319 | else |
| 1320 | { |
| 1321 | *o++ = *p++; |
| 1322 | } |
| 1323 | #endif /* not VMS */ |
| 1324 | } |
| 1325 | |
| 1326 | return make_string (target, o - target); |
| 1327 | } |
| 1328 | #endif |
| 1329 | \f |
| 1330 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
| 1331 | Ssubstitute_in_file_name, 1, 1, 0, |
| 1332 | "Substitute environment variables referred to in FILENAME.\n\ |
| 1333 | `$FOO' where FOO is an environment variable name means to substitute\n\ |
| 1334 | the value of that variable. The variable name should be terminated\n\ |
| 1335 | with a character not a letter, digit or underscore; otherwise, enclose\n\ |
| 1336 | the entire variable name in braces.\n\ |
| 1337 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ |
| 1338 | On VMS, `$' substitution is not done; this function does little and only\n\ |
| 1339 | duplicates what `expand-file-name' does.") |
| 1340 | (string) |
| 1341 | Lisp_Object string; |
| 1342 | { |
| 1343 | unsigned char *nm; |
| 1344 | |
| 1345 | register unsigned char *s, *p, *o, *x, *endp; |
| 1346 | unsigned char *target; |
| 1347 | int total = 0; |
| 1348 | int substituted = 0; |
| 1349 | unsigned char *xnm; |
| 1350 | |
| 1351 | CHECK_STRING (string, 0); |
| 1352 | |
| 1353 | nm = XSTRING (string)->data; |
| 1354 | endp = nm + XSTRING (string)->size; |
| 1355 | |
| 1356 | /* If /~ or // appears, discard everything through first slash. */ |
| 1357 | |
| 1358 | for (p = nm; p != endp; p++) |
| 1359 | { |
| 1360 | if ((p[0] == '~' || |
| 1361 | #ifdef APOLLO |
| 1362 | /* // at start of file name is meaningful in Apollo system */ |
| 1363 | (p[0] == '/' && p - 1 != nm) |
| 1364 | #else /* not APOLLO */ |
| 1365 | p[0] == '/' |
| 1366 | #endif /* not APOLLO */ |
| 1367 | ) |
| 1368 | && p != nm && |
| 1369 | #ifdef VMS |
| 1370 | (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' || |
| 1371 | #endif /* VMS */ |
| 1372 | p[-1] == '/') |
| 1373 | #ifdef VMS |
| 1374 | ) |
| 1375 | #endif /* VMS */ |
| 1376 | { |
| 1377 | nm = p; |
| 1378 | substituted = 1; |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | #ifdef VMS |
| 1383 | return build_string (nm); |
| 1384 | #else |
| 1385 | |
| 1386 | /* See if any variables are substituted into the string |
| 1387 | and find the total length of their values in `total' */ |
| 1388 | |
| 1389 | for (p = nm; p != endp;) |
| 1390 | if (*p != '$') |
| 1391 | p++; |
| 1392 | else |
| 1393 | { |
| 1394 | p++; |
| 1395 | if (p == endp) |
| 1396 | goto badsubst; |
| 1397 | else if (*p == '$') |
| 1398 | { |
| 1399 | /* "$$" means a single "$" */ |
| 1400 | p++; |
| 1401 | total -= 1; |
| 1402 | substituted = 1; |
| 1403 | continue; |
| 1404 | } |
| 1405 | else if (*p == '{') |
| 1406 | { |
| 1407 | o = ++p; |
| 1408 | while (p != endp && *p != '}') p++; |
| 1409 | if (*p != '}') goto missingclose; |
| 1410 | s = p; |
| 1411 | } |
| 1412 | else |
| 1413 | { |
| 1414 | o = p; |
| 1415 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1416 | s = p; |
| 1417 | } |
| 1418 | |
| 1419 | /* Copy out the variable name */ |
| 1420 | target = (unsigned char *) alloca (s - o + 1); |
| 1421 | strncpy (target, o, s - o); |
| 1422 | target[s - o] = 0; |
| 1423 | |
| 1424 | /* Get variable value */ |
| 1425 | o = (unsigned char *) egetenv (target); |
| 1426 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ |
| 1427 | #if 0 |
| 1428 | #ifdef USG |
| 1429 | if (!o && !strcmp (target, "USER")) |
| 1430 | o = egetenv ("LOGNAME"); |
| 1431 | #endif /* USG */ |
| 1432 | #endif /* 0 */ |
| 1433 | if (!o) goto badvar; |
| 1434 | total += strlen (o); |
| 1435 | substituted = 1; |
| 1436 | } |
| 1437 | |
| 1438 | if (!substituted) |
| 1439 | return string; |
| 1440 | |
| 1441 | /* If substitution required, recopy the string and do it */ |
| 1442 | /* Make space in stack frame for the new copy */ |
| 1443 | xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1); |
| 1444 | x = xnm; |
| 1445 | |
| 1446 | /* Copy the rest of the name through, replacing $ constructs with values */ |
| 1447 | for (p = nm; *p;) |
| 1448 | if (*p != '$') |
| 1449 | *x++ = *p++; |
| 1450 | else |
| 1451 | { |
| 1452 | p++; |
| 1453 | if (p == endp) |
| 1454 | goto badsubst; |
| 1455 | else if (*p == '$') |
| 1456 | { |
| 1457 | *x++ = *p++; |
| 1458 | continue; |
| 1459 | } |
| 1460 | else if (*p == '{') |
| 1461 | { |
| 1462 | o = ++p; |
| 1463 | while (p != endp && *p != '}') p++; |
| 1464 | if (*p != '}') goto missingclose; |
| 1465 | s = p++; |
| 1466 | } |
| 1467 | else |
| 1468 | { |
| 1469 | o = p; |
| 1470 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1471 | s = p; |
| 1472 | } |
| 1473 | |
| 1474 | /* Copy out the variable name */ |
| 1475 | target = (unsigned char *) alloca (s - o + 1); |
| 1476 | strncpy (target, o, s - o); |
| 1477 | target[s - o] = 0; |
| 1478 | |
| 1479 | /* Get variable value */ |
| 1480 | o = (unsigned char *) egetenv (target); |
| 1481 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ |
| 1482 | #if 0 |
| 1483 | #ifdef USG |
| 1484 | if (!o && !strcmp (target, "USER")) |
| 1485 | o = egetenv ("LOGNAME"); |
| 1486 | #endif /* USG */ |
| 1487 | #endif /* 0 */ |
| 1488 | if (!o) |
| 1489 | goto badvar; |
| 1490 | |
| 1491 | strcpy (x, o); |
| 1492 | x += strlen (o); |
| 1493 | } |
| 1494 | |
| 1495 | *x = 0; |
| 1496 | |
| 1497 | /* If /~ or // appears, discard everything through first slash. */ |
| 1498 | |
| 1499 | for (p = xnm; p != x; p++) |
| 1500 | if ((p[0] == '~' || |
| 1501 | #ifdef APOLLO |
| 1502 | /* // at start of file name is meaningful in Apollo system */ |
| 1503 | (p[0] == '/' && p - 1 != xnm) |
| 1504 | #else /* not APOLLO */ |
| 1505 | p[0] == '/' |
| 1506 | #endif /* not APOLLO */ |
| 1507 | ) |
| 1508 | && p != nm && p[-1] == '/') |
| 1509 | xnm = p; |
| 1510 | |
| 1511 | return make_string (xnm, x - xnm); |
| 1512 | |
| 1513 | badsubst: |
| 1514 | error ("Bad format environment-variable substitution"); |
| 1515 | missingclose: |
| 1516 | error ("Missing \"}\" in environment-variable substitution"); |
| 1517 | badvar: |
| 1518 | error ("Substituting nonexistent environment variable \"%s\"", target); |
| 1519 | |
| 1520 | /* NOTREACHED */ |
| 1521 | #endif /* not VMS */ |
| 1522 | } |
| 1523 | \f |
| 1524 | /* A slightly faster and more convenient way to get |
| 1525 | (directory-file-name (expand-file-name FOO)). */ |
| 1526 | |
| 1527 | Lisp_Object |
| 1528 | expand_and_dir_to_file (filename, defdir) |
| 1529 | Lisp_Object filename, defdir; |
| 1530 | { |
| 1531 | register Lisp_Object abspath; |
| 1532 | |
| 1533 | abspath = Fexpand_file_name (filename, defdir); |
| 1534 | #ifdef VMS |
| 1535 | { |
| 1536 | register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1]; |
| 1537 | if (c == ':' || c == ']' || c == '>') |
| 1538 | abspath = Fdirectory_file_name (abspath); |
| 1539 | } |
| 1540 | #else |
| 1541 | /* Remove final slash, if any (unless path is root). |
| 1542 | stat behaves differently depending! */ |
| 1543 | if (XSTRING (abspath)->size > 1 |
| 1544 | && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/') |
| 1545 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1546 | abspath = Fdirectory_file_name (abspath); |
| 1547 | #endif |
| 1548 | return abspath; |
| 1549 | } |
| 1550 | \f |
| 1551 | barf_or_query_if_file_exists (absname, querystring, interactive) |
| 1552 | Lisp_Object absname; |
| 1553 | unsigned char *querystring; |
| 1554 | int interactive; |
| 1555 | { |
| 1556 | register Lisp_Object tem; |
| 1557 | struct gcpro gcpro1; |
| 1558 | |
| 1559 | if (access (XSTRING (absname)->data, 4) >= 0) |
| 1560 | { |
| 1561 | if (! interactive) |
| 1562 | Fsignal (Qfile_already_exists, |
| 1563 | Fcons (build_string ("File already exists"), |
| 1564 | Fcons (absname, Qnil))); |
| 1565 | GCPRO1 (absname); |
| 1566 | tem = do_yes_or_no_p (format1 ("File %s already exists; %s anyway? ", |
| 1567 | XSTRING (absname)->data, querystring)); |
| 1568 | UNGCPRO; |
| 1569 | if (NILP (tem)) |
| 1570 | Fsignal (Qfile_already_exists, |
| 1571 | Fcons (build_string ("File already exists"), |
| 1572 | Fcons (absname, Qnil))); |
| 1573 | } |
| 1574 | return; |
| 1575 | } |
| 1576 | |
| 1577 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, |
| 1578 | "fCopy file: \nFCopy %s to file: \np\nP", |
| 1579 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
| 1580 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ |
| 1581 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ |
| 1582 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1583 | This is what happens in interactive use with M-x.\n\ |
| 1584 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
| 1585 | last-modified time as the old one. (This works on only some systems.)\n\ |
| 1586 | A prefix arg makes KEEP-TIME non-nil.") |
| 1587 | (filename, newname, ok_if_already_exists, keep_date) |
| 1588 | Lisp_Object filename, newname, ok_if_already_exists, keep_date; |
| 1589 | { |
| 1590 | int ifd, ofd, n; |
| 1591 | char buf[16 * 1024]; |
| 1592 | struct stat st; |
| 1593 | Lisp_Object handler; |
| 1594 | struct gcpro gcpro1, gcpro2; |
| 1595 | int count = specpdl_ptr - specpdl; |
| 1596 | Lisp_Object args[6]; |
| 1597 | int input_file_statable_p; |
| 1598 | |
| 1599 | GCPRO2 (filename, newname); |
| 1600 | CHECK_STRING (filename, 0); |
| 1601 | CHECK_STRING (newname, 1); |
| 1602 | filename = Fexpand_file_name (filename, Qnil); |
| 1603 | newname = Fexpand_file_name (newname, Qnil); |
| 1604 | |
| 1605 | /* If the input file name has special constructs in it, |
| 1606 | call the corresponding file handler. */ |
| 1607 | handler = Ffind_file_name_handler (filename); |
| 1608 | /* Likewise for output file name. */ |
| 1609 | if (NILP (handler)) |
| 1610 | handler = Ffind_file_name_handler (newname); |
| 1611 | if (!NILP (handler)) |
| 1612 | return call5 (handler, Qcopy_file, filename, newname, |
| 1613 | ok_if_already_exists, keep_date); |
| 1614 | |
| 1615 | if (NILP (ok_if_already_exists) |
| 1616 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1617 | barf_or_query_if_file_exists (newname, "copy to it", |
| 1618 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1619 | |
| 1620 | ifd = open (XSTRING (filename)->data, 0); |
| 1621 | if (ifd < 0) |
| 1622 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 1623 | |
| 1624 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
| 1625 | |
| 1626 | /* We can only copy regular files and symbolic links. Other files are not |
| 1627 | copyable by us. */ |
| 1628 | input_file_statable_p = (fstat (ifd, &st) >= 0); |
| 1629 | |
| 1630 | #if defined (S_ISREG) && defined (S_ISLNK) |
| 1631 | if (input_file_statable_p) |
| 1632 | { |
| 1633 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) |
| 1634 | { |
| 1635 | #if defined (EISDIR) |
| 1636 | /* Get a better looking error message. */ |
| 1637 | errno = EISDIR; |
| 1638 | #endif /* EISDIR */ |
| 1639 | report_file_error ("Non-regular file", Fcons (filename, Qnil)); |
| 1640 | } |
| 1641 | } |
| 1642 | #endif /* S_ISREG && S_ISLNK */ |
| 1643 | |
| 1644 | #ifdef VMS |
| 1645 | /* Create the copy file with the same record format as the input file */ |
| 1646 | ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); |
| 1647 | #else |
| 1648 | ofd = creat (XSTRING (newname)->data, 0666); |
| 1649 | #endif /* VMS */ |
| 1650 | if (ofd < 0) |
| 1651 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
| 1652 | |
| 1653 | record_unwind_protect (close_file_unwind, make_number (ofd)); |
| 1654 | |
| 1655 | immediate_quit = 1; |
| 1656 | QUIT; |
| 1657 | while ((n = read (ifd, buf, sizeof buf)) > 0) |
| 1658 | if (write (ofd, buf, n) != n) |
| 1659 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1660 | immediate_quit = 0; |
| 1661 | |
| 1662 | if (input_file_statable_p) |
| 1663 | { |
| 1664 | if (!NILP (keep_date)) |
| 1665 | { |
| 1666 | EMACS_TIME atime, mtime; |
| 1667 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); |
| 1668 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); |
| 1669 | EMACS_SET_UTIMES (XSTRING (newname)->data, atime, mtime); |
| 1670 | } |
| 1671 | #ifdef APOLLO |
| 1672 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 1673 | #endif |
| 1674 | chmod (XSTRING (newname)->data, st.st_mode & 07777); |
| 1675 | } |
| 1676 | |
| 1677 | /* Discard the unwind protects. */ |
| 1678 | specpdl_ptr = specpdl + count; |
| 1679 | |
| 1680 | close (ifd); |
| 1681 | if (close (ofd) < 0) |
| 1682 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1683 | |
| 1684 | UNGCPRO; |
| 1685 | return Qnil; |
| 1686 | } |
| 1687 | |
| 1688 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
| 1689 | Smake_directory_internal, 1, 1, 0, |
| 1690 | "Create a directory. One argument, a file name string.") |
| 1691 | (dirname) |
| 1692 | Lisp_Object dirname; |
| 1693 | { |
| 1694 | unsigned char *dir; |
| 1695 | Lisp_Object handler; |
| 1696 | |
| 1697 | CHECK_STRING (dirname, 0); |
| 1698 | dirname = Fexpand_file_name (dirname, Qnil); |
| 1699 | |
| 1700 | handler = Ffind_file_name_handler (dirname); |
| 1701 | if (!NILP (handler)) |
| 1702 | return call3 (handler, Qmake_directory, dirname, Qnil); |
| 1703 | |
| 1704 | dir = XSTRING (dirname)->data; |
| 1705 | |
| 1706 | if (mkdir (dir, 0777) != 0) |
| 1707 | report_file_error ("Creating directory", Flist (1, &dirname)); |
| 1708 | |
| 1709 | return Qnil; |
| 1710 | } |
| 1711 | |
| 1712 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
| 1713 | "Delete a directory. One argument, a file name string.") |
| 1714 | (dirname) |
| 1715 | Lisp_Object dirname; |
| 1716 | { |
| 1717 | unsigned char *dir; |
| 1718 | Lisp_Object handler; |
| 1719 | |
| 1720 | CHECK_STRING (dirname, 0); |
| 1721 | dirname = Fexpand_file_name (dirname, Qnil); |
| 1722 | dir = XSTRING (dirname)->data; |
| 1723 | |
| 1724 | handler = Ffind_file_name_handler (dirname); |
| 1725 | if (!NILP (handler)) |
| 1726 | return call2 (handler, Qdelete_directory, dirname); |
| 1727 | |
| 1728 | if (rmdir (dir) != 0) |
| 1729 | report_file_error ("Removing directory", Flist (1, &dirname)); |
| 1730 | |
| 1731 | return Qnil; |
| 1732 | } |
| 1733 | |
| 1734 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", |
| 1735 | "Delete specified file. One argument, a file name string.\n\ |
| 1736 | If file has multiple names, it continues to exist with the other names.") |
| 1737 | (filename) |
| 1738 | Lisp_Object filename; |
| 1739 | { |
| 1740 | Lisp_Object handler; |
| 1741 | CHECK_STRING (filename, 0); |
| 1742 | filename = Fexpand_file_name (filename, Qnil); |
| 1743 | |
| 1744 | handler = Ffind_file_name_handler (filename); |
| 1745 | if (!NILP (handler)) |
| 1746 | return call2 (handler, Qdelete_file, filename); |
| 1747 | |
| 1748 | if (0 > unlink (XSTRING (filename)->data)) |
| 1749 | report_file_error ("Removing old name", Flist (1, &filename)); |
| 1750 | return Qnil; |
| 1751 | } |
| 1752 | |
| 1753 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
| 1754 | "fRename file: \nFRename %s to file: \np", |
| 1755 | "Rename FILE as NEWNAME. Both args strings.\n\ |
| 1756 | If file has names other than FILE, it continues to have those names.\n\ |
| 1757 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1758 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1759 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1760 | This is what happens in interactive use with M-x.") |
| 1761 | (filename, newname, ok_if_already_exists) |
| 1762 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1763 | { |
| 1764 | #ifdef NO_ARG_ARRAY |
| 1765 | Lisp_Object args[2]; |
| 1766 | #endif |
| 1767 | Lisp_Object handler; |
| 1768 | struct gcpro gcpro1, gcpro2; |
| 1769 | |
| 1770 | GCPRO2 (filename, newname); |
| 1771 | CHECK_STRING (filename, 0); |
| 1772 | CHECK_STRING (newname, 1); |
| 1773 | filename = Fexpand_file_name (filename, Qnil); |
| 1774 | newname = Fexpand_file_name (newname, Qnil); |
| 1775 | |
| 1776 | /* If the file name has special constructs in it, |
| 1777 | call the corresponding file handler. */ |
| 1778 | handler = Ffind_file_name_handler (filename); |
| 1779 | if (NILP (handler)) |
| 1780 | handler = Ffind_file_name_handler (newname); |
| 1781 | if (!NILP (handler)) |
| 1782 | return call4 (handler, Qrename_file, |
| 1783 | filename, newname, ok_if_already_exists); |
| 1784 | |
| 1785 | if (NILP (ok_if_already_exists) |
| 1786 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1787 | barf_or_query_if_file_exists (newname, "rename to it", |
| 1788 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1789 | #ifndef BSD4_1 |
| 1790 | if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 1791 | #else |
| 1792 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data) |
| 1793 | || 0 > unlink (XSTRING (filename)->data)) |
| 1794 | #endif |
| 1795 | { |
| 1796 | if (errno == EXDEV) |
| 1797 | { |
| 1798 | Fcopy_file (filename, newname, |
| 1799 | /* We have already prompted if it was an integer, |
| 1800 | so don't have copy-file prompt again. */ |
| 1801 | NILP (ok_if_already_exists) ? Qnil : Qt, Qt); |
| 1802 | Fdelete_file (filename); |
| 1803 | } |
| 1804 | else |
| 1805 | #ifdef NO_ARG_ARRAY |
| 1806 | { |
| 1807 | args[0] = filename; |
| 1808 | args[1] = newname; |
| 1809 | report_file_error ("Renaming", Flist (2, args)); |
| 1810 | } |
| 1811 | #else |
| 1812 | report_file_error ("Renaming", Flist (2, &filename)); |
| 1813 | #endif |
| 1814 | } |
| 1815 | UNGCPRO; |
| 1816 | return Qnil; |
| 1817 | } |
| 1818 | |
| 1819 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, |
| 1820 | "fAdd name to file: \nFName to add to %s: \np", |
| 1821 | "Give FILE additional name NEWNAME. Both args strings.\n\ |
| 1822 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1823 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1824 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1825 | This is what happens in interactive use with M-x.") |
| 1826 | (filename, newname, ok_if_already_exists) |
| 1827 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1828 | { |
| 1829 | #ifdef NO_ARG_ARRAY |
| 1830 | Lisp_Object args[2]; |
| 1831 | #endif |
| 1832 | Lisp_Object handler; |
| 1833 | struct gcpro gcpro1, gcpro2; |
| 1834 | |
| 1835 | GCPRO2 (filename, newname); |
| 1836 | CHECK_STRING (filename, 0); |
| 1837 | CHECK_STRING (newname, 1); |
| 1838 | filename = Fexpand_file_name (filename, Qnil); |
| 1839 | newname = Fexpand_file_name (newname, Qnil); |
| 1840 | |
| 1841 | /* If the file name has special constructs in it, |
| 1842 | call the corresponding file handler. */ |
| 1843 | handler = Ffind_file_name_handler (filename); |
| 1844 | if (!NILP (handler)) |
| 1845 | return call4 (handler, Qadd_name_to_file, filename, newname, |
| 1846 | ok_if_already_exists); |
| 1847 | |
| 1848 | if (NILP (ok_if_already_exists) |
| 1849 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1850 | barf_or_query_if_file_exists (newname, "make it a new name", |
| 1851 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1852 | unlink (XSTRING (newname)->data); |
| 1853 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 1854 | { |
| 1855 | #ifdef NO_ARG_ARRAY |
| 1856 | args[0] = filename; |
| 1857 | args[1] = newname; |
| 1858 | report_file_error ("Adding new name", Flist (2, args)); |
| 1859 | #else |
| 1860 | report_file_error ("Adding new name", Flist (2, &filename)); |
| 1861 | #endif |
| 1862 | } |
| 1863 | |
| 1864 | UNGCPRO; |
| 1865 | return Qnil; |
| 1866 | } |
| 1867 | |
| 1868 | #ifdef S_IFLNK |
| 1869 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
| 1870 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", |
| 1871 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ |
| 1872 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1873 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1874 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1875 | This happens for interactive use with M-x.") |
| 1876 | (filename, linkname, ok_if_already_exists) |
| 1877 | Lisp_Object filename, linkname, ok_if_already_exists; |
| 1878 | { |
| 1879 | #ifdef NO_ARG_ARRAY |
| 1880 | Lisp_Object args[2]; |
| 1881 | #endif |
| 1882 | Lisp_Object handler; |
| 1883 | struct gcpro gcpro1, gcpro2; |
| 1884 | |
| 1885 | GCPRO2 (filename, linkname); |
| 1886 | CHECK_STRING (filename, 0); |
| 1887 | CHECK_STRING (linkname, 1); |
| 1888 | /* If the link target has a ~, we must expand it to get |
| 1889 | a truly valid file name. Otherwise, do not expand; |
| 1890 | we want to permit links to relative file names. */ |
| 1891 | if (XSTRING (filename)->data[0] == '~') |
| 1892 | filename = Fexpand_file_name (filename, Qnil); |
| 1893 | linkname = Fexpand_file_name (linkname, Qnil); |
| 1894 | |
| 1895 | /* If the file name has special constructs in it, |
| 1896 | call the corresponding file handler. */ |
| 1897 | handler = Ffind_file_name_handler (filename); |
| 1898 | if (!NILP (handler)) |
| 1899 | return call4 (handler, Qmake_symbolic_link, filename, linkname, |
| 1900 | ok_if_already_exists); |
| 1901 | |
| 1902 | if (NILP (ok_if_already_exists) |
| 1903 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1904 | barf_or_query_if_file_exists (linkname, "make it a link", |
| 1905 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1906 | if (0 > symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 1907 | { |
| 1908 | /* If we didn't complain already, silently delete existing file. */ |
| 1909 | if (errno == EEXIST) |
| 1910 | { |
| 1911 | unlink (XSTRING (linkname)->data); |
| 1912 | if (0 <= symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 1913 | return Qnil; |
| 1914 | } |
| 1915 | |
| 1916 | #ifdef NO_ARG_ARRAY |
| 1917 | args[0] = filename; |
| 1918 | args[1] = linkname; |
| 1919 | report_file_error ("Making symbolic link", Flist (2, args)); |
| 1920 | #else |
| 1921 | report_file_error ("Making symbolic link", Flist (2, &filename)); |
| 1922 | #endif |
| 1923 | } |
| 1924 | UNGCPRO; |
| 1925 | return Qnil; |
| 1926 | } |
| 1927 | #endif /* S_IFLNK */ |
| 1928 | |
| 1929 | #ifdef VMS |
| 1930 | |
| 1931 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, |
| 1932 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", |
| 1933 | "Define the job-wide logical name NAME to have the value STRING.\n\ |
| 1934 | If STRING is nil or a null string, the logical name NAME is deleted.") |
| 1935 | (varname, string) |
| 1936 | Lisp_Object varname; |
| 1937 | Lisp_Object string; |
| 1938 | { |
| 1939 | CHECK_STRING (varname, 0); |
| 1940 | if (NILP (string)) |
| 1941 | delete_logical_name (XSTRING (varname)->data); |
| 1942 | else |
| 1943 | { |
| 1944 | CHECK_STRING (string, 1); |
| 1945 | |
| 1946 | if (XSTRING (string)->size == 0) |
| 1947 | delete_logical_name (XSTRING (varname)->data); |
| 1948 | else |
| 1949 | define_logical_name (XSTRING (varname)->data, XSTRING (string)->data); |
| 1950 | } |
| 1951 | |
| 1952 | return string; |
| 1953 | } |
| 1954 | #endif /* VMS */ |
| 1955 | |
| 1956 | #ifdef HPUX_NET |
| 1957 | |
| 1958 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, |
| 1959 | "Open a network connection to PATH using LOGIN as the login string.") |
| 1960 | (path, login) |
| 1961 | Lisp_Object path, login; |
| 1962 | { |
| 1963 | int netresult; |
| 1964 | |
| 1965 | CHECK_STRING (path, 0); |
| 1966 | CHECK_STRING (login, 0); |
| 1967 | |
| 1968 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); |
| 1969 | |
| 1970 | if (netresult == -1) |
| 1971 | return Qnil; |
| 1972 | else |
| 1973 | return Qt; |
| 1974 | } |
| 1975 | #endif /* HPUX_NET */ |
| 1976 | \f |
| 1977 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
| 1978 | 1, 1, 0, |
| 1979 | "Return t if file FILENAME specifies an absolute path name.\n\ |
| 1980 | On Unix, this is a name starting with a `/' or a `~'.") |
| 1981 | (filename) |
| 1982 | Lisp_Object filename; |
| 1983 | { |
| 1984 | unsigned char *ptr; |
| 1985 | |
| 1986 | CHECK_STRING (filename, 0); |
| 1987 | ptr = XSTRING (filename)->data; |
| 1988 | if (*ptr == '/' || *ptr == '~' |
| 1989 | #ifdef VMS |
| 1990 | /* ??? This criterion is probably wrong for '<'. */ |
| 1991 | || index (ptr, ':') || index (ptr, '<') |
| 1992 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) |
| 1993 | && ptr[1] != '.') |
| 1994 | #endif /* VMS */ |
| 1995 | ) |
| 1996 | return Qt; |
| 1997 | else |
| 1998 | return Qnil; |
| 1999 | } |
| 2000 | |
| 2001 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
| 2002 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ |
| 2003 | See also `file-readable-p' and `file-attributes'.") |
| 2004 | (filename) |
| 2005 | Lisp_Object filename; |
| 2006 | { |
| 2007 | Lisp_Object abspath; |
| 2008 | Lisp_Object handler; |
| 2009 | |
| 2010 | CHECK_STRING (filename, 0); |
| 2011 | abspath = Fexpand_file_name (filename, Qnil); |
| 2012 | |
| 2013 | /* If the file name has special constructs in it, |
| 2014 | call the corresponding file handler. */ |
| 2015 | handler = Ffind_file_name_handler (abspath); |
| 2016 | if (!NILP (handler)) |
| 2017 | return call2 (handler, Qfile_exists_p, abspath); |
| 2018 | |
| 2019 | return (access (XSTRING (abspath)->data, 0) >= 0) ? Qt : Qnil; |
| 2020 | } |
| 2021 | |
| 2022 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, |
| 2023 | "Return t if FILENAME can be executed by you.\n\ |
| 2024 | For a directory, this means you can access files in that directory.") |
| 2025 | (filename) |
| 2026 | Lisp_Object filename; |
| 2027 | |
| 2028 | { |
| 2029 | Lisp_Object abspath; |
| 2030 | Lisp_Object handler; |
| 2031 | |
| 2032 | CHECK_STRING (filename, 0); |
| 2033 | abspath = Fexpand_file_name (filename, Qnil); |
| 2034 | |
| 2035 | /* If the file name has special constructs in it, |
| 2036 | call the corresponding file handler. */ |
| 2037 | handler = Ffind_file_name_handler (abspath); |
| 2038 | if (!NILP (handler)) |
| 2039 | return call2 (handler, Qfile_executable_p, abspath); |
| 2040 | |
| 2041 | return (access (XSTRING (abspath)->data, 1) >= 0) ? Qt : Qnil; |
| 2042 | } |
| 2043 | |
| 2044 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
| 2045 | "Return t if file FILENAME exists and you can read it.\n\ |
| 2046 | See also `file-exists-p' and `file-attributes'.") |
| 2047 | (filename) |
| 2048 | Lisp_Object filename; |
| 2049 | { |
| 2050 | Lisp_Object abspath; |
| 2051 | Lisp_Object handler; |
| 2052 | |
| 2053 | CHECK_STRING (filename, 0); |
| 2054 | abspath = Fexpand_file_name (filename, Qnil); |
| 2055 | |
| 2056 | /* If the file name has special constructs in it, |
| 2057 | call the corresponding file handler. */ |
| 2058 | handler = Ffind_file_name_handler (abspath); |
| 2059 | if (!NILP (handler)) |
| 2060 | return call2 (handler, Qfile_readable_p, abspath); |
| 2061 | |
| 2062 | return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil; |
| 2063 | } |
| 2064 | |
| 2065 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
| 2066 | "If file FILENAME is the name of a symbolic link\n\ |
| 2067 | returns the name of the file to which it is linked.\n\ |
| 2068 | Otherwise returns NIL.") |
| 2069 | (filename) |
| 2070 | Lisp_Object filename; |
| 2071 | { |
| 2072 | #ifdef S_IFLNK |
| 2073 | char *buf; |
| 2074 | int bufsize; |
| 2075 | int valsize; |
| 2076 | Lisp_Object val; |
| 2077 | Lisp_Object handler; |
| 2078 | |
| 2079 | CHECK_STRING (filename, 0); |
| 2080 | filename = Fexpand_file_name (filename, Qnil); |
| 2081 | |
| 2082 | /* If the file name has special constructs in it, |
| 2083 | call the corresponding file handler. */ |
| 2084 | handler = Ffind_file_name_handler (filename); |
| 2085 | if (!NILP (handler)) |
| 2086 | return call2 (handler, Qfile_symlink_p, filename); |
| 2087 | |
| 2088 | bufsize = 100; |
| 2089 | while (1) |
| 2090 | { |
| 2091 | buf = (char *) xmalloc (bufsize); |
| 2092 | bzero (buf, bufsize); |
| 2093 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); |
| 2094 | if (valsize < bufsize) break; |
| 2095 | /* Buffer was not long enough */ |
| 2096 | xfree (buf); |
| 2097 | bufsize *= 2; |
| 2098 | } |
| 2099 | if (valsize == -1) |
| 2100 | { |
| 2101 | xfree (buf); |
| 2102 | return Qnil; |
| 2103 | } |
| 2104 | val = make_string (buf, valsize); |
| 2105 | xfree (buf); |
| 2106 | return val; |
| 2107 | #else /* not S_IFLNK */ |
| 2108 | return Qnil; |
| 2109 | #endif /* not S_IFLNK */ |
| 2110 | } |
| 2111 | |
| 2112 | #ifdef SOLARIS_BROKEN_ACCESS |
| 2113 | /* In Solaris 2.1, the readonly-ness of the filesystem is not |
| 2114 | considered by the access system call. This is Sun's bug, but we |
| 2115 | still have to make Emacs work. */ |
| 2116 | |
| 2117 | #include <sys/statvfs.h> |
| 2118 | |
| 2119 | static int |
| 2120 | ro_fsys (path) |
| 2121 | char *path; |
| 2122 | { |
| 2123 | struct statvfs statvfsb; |
| 2124 | |
| 2125 | if (statvfs(path, &statvfsb)) |
| 2126 | return 1; /* error from statvfs, be conservative and say not wrtable */ |
| 2127 | else |
| 2128 | /* Otherwise, fsys is ro if bit is set. */ |
| 2129 | return statvfsb.f_flag & ST_RDONLY; |
| 2130 | } |
| 2131 | #else |
| 2132 | /* But on every other os, access has already done the right thing. */ |
| 2133 | #define ro_fsys(path) 0 |
| 2134 | #endif |
| 2135 | |
| 2136 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
| 2137 | on the RT/PC. */ |
| 2138 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
| 2139 | "Return t if file FILENAME can be written or created by you.") |
| 2140 | (filename) |
| 2141 | Lisp_Object filename; |
| 2142 | { |
| 2143 | Lisp_Object abspath, dir; |
| 2144 | Lisp_Object handler; |
| 2145 | |
| 2146 | CHECK_STRING (filename, 0); |
| 2147 | abspath = Fexpand_file_name (filename, Qnil); |
| 2148 | |
| 2149 | /* If the file name has special constructs in it, |
| 2150 | call the corresponding file handler. */ |
| 2151 | handler = Ffind_file_name_handler (abspath); |
| 2152 | if (!NILP (handler)) |
| 2153 | return call2 (handler, Qfile_writable_p, abspath); |
| 2154 | |
| 2155 | if (access (XSTRING (abspath)->data, 0) >= 0) |
| 2156 | return ((access (XSTRING (abspath)->data, 2) >= 0 |
| 2157 | && ! ro_fsys ((char *) XSTRING (abspath)->data)) |
| 2158 | ? Qt : Qnil); |
| 2159 | dir = Ffile_name_directory (abspath); |
| 2160 | #ifdef VMS |
| 2161 | if (!NILP (dir)) |
| 2162 | dir = Fdirectory_file_name (dir); |
| 2163 | #endif /* VMS */ |
| 2164 | return ((access (!NILP (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0 |
| 2165 | && ! ro_fsys ((char *) XSTRING (dir)->data)) |
| 2166 | ? Qt : Qnil); |
| 2167 | } |
| 2168 | |
| 2169 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
| 2170 | "Return t if file FILENAME is the name of a directory as a file.\n\ |
| 2171 | A directory name spec may be given instead; then the value is t\n\ |
| 2172 | if the directory so specified exists and really is a directory.") |
| 2173 | (filename) |
| 2174 | Lisp_Object filename; |
| 2175 | { |
| 2176 | register Lisp_Object abspath; |
| 2177 | struct stat st; |
| 2178 | Lisp_Object handler; |
| 2179 | |
| 2180 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2181 | |
| 2182 | /* If the file name has special constructs in it, |
| 2183 | call the corresponding file handler. */ |
| 2184 | handler = Ffind_file_name_handler (abspath); |
| 2185 | if (!NILP (handler)) |
| 2186 | return call2 (handler, Qfile_directory_p, abspath); |
| 2187 | |
| 2188 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2189 | return Qnil; |
| 2190 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; |
| 2191 | } |
| 2192 | |
| 2193 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
| 2194 | "Return t if file FILENAME is the name of a directory as a file,\n\ |
| 2195 | and files in that directory can be opened by you. In order to use a\n\ |
| 2196 | directory as a buffer's current directory, this predicate must return true.\n\ |
| 2197 | A directory name spec may be given instead; then the value is t\n\ |
| 2198 | if the directory so specified exists and really is a readable and\n\ |
| 2199 | searchable directory.") |
| 2200 | (filename) |
| 2201 | Lisp_Object filename; |
| 2202 | { |
| 2203 | Lisp_Object handler; |
| 2204 | |
| 2205 | /* If the file name has special constructs in it, |
| 2206 | call the corresponding file handler. */ |
| 2207 | handler = Ffind_file_name_handler (filename); |
| 2208 | if (!NILP (handler)) |
| 2209 | return call2 (handler, Qfile_accessible_directory_p, filename); |
| 2210 | |
| 2211 | if (NILP (Ffile_directory_p (filename)) |
| 2212 | || NILP (Ffile_executable_p (filename))) |
| 2213 | return Qnil; |
| 2214 | else |
| 2215 | return Qt; |
| 2216 | } |
| 2217 | |
| 2218 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
| 2219 | "Return mode bits of FILE, as an integer.") |
| 2220 | (filename) |
| 2221 | Lisp_Object filename; |
| 2222 | { |
| 2223 | Lisp_Object abspath; |
| 2224 | struct stat st; |
| 2225 | Lisp_Object handler; |
| 2226 | |
| 2227 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2228 | |
| 2229 | /* If the file name has special constructs in it, |
| 2230 | call the corresponding file handler. */ |
| 2231 | handler = Ffind_file_name_handler (abspath); |
| 2232 | if (!NILP (handler)) |
| 2233 | return call2 (handler, Qfile_modes, abspath); |
| 2234 | |
| 2235 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2236 | return Qnil; |
| 2237 | return make_number (st.st_mode & 07777); |
| 2238 | } |
| 2239 | |
| 2240 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, |
| 2241 | "Set mode bits of FILE to MODE (an integer).\n\ |
| 2242 | Only the 12 low bits of MODE are used.") |
| 2243 | (filename, mode) |
| 2244 | Lisp_Object filename, mode; |
| 2245 | { |
| 2246 | Lisp_Object abspath; |
| 2247 | Lisp_Object handler; |
| 2248 | |
| 2249 | abspath = Fexpand_file_name (filename, current_buffer->directory); |
| 2250 | CHECK_NUMBER (mode, 1); |
| 2251 | |
| 2252 | /* If the file name has special constructs in it, |
| 2253 | call the corresponding file handler. */ |
| 2254 | handler = Ffind_file_name_handler (abspath); |
| 2255 | if (!NILP (handler)) |
| 2256 | return call3 (handler, Qset_file_modes, abspath, mode); |
| 2257 | |
| 2258 | #ifndef APOLLO |
| 2259 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2260 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2261 | #else /* APOLLO */ |
| 2262 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 2263 | { |
| 2264 | struct stat st; |
| 2265 | struct timeval tvp[2]; |
| 2266 | |
| 2267 | /* chmod on apollo also change the file's modtime; need to save the |
| 2268 | modtime and then restore it. */ |
| 2269 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2270 | { |
| 2271 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2272 | return (Qnil); |
| 2273 | } |
| 2274 | |
| 2275 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2276 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2277 | |
| 2278 | /* reset the old accessed and modified times. */ |
| 2279 | tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2280 | tvp[0].tv_usec = 0; |
| 2281 | tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2282 | tvp[1].tv_usec = 0; |
| 2283 | |
| 2284 | if (utimes (XSTRING (abspath)->data, tvp) < 0) |
| 2285 | report_file_error ("Doing utimes", Fcons (abspath, Qnil)); |
| 2286 | } |
| 2287 | #endif /* APOLLO */ |
| 2288 | |
| 2289 | return Qnil; |
| 2290 | } |
| 2291 | |
| 2292 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
| 2293 | "Set the file permission bits for newly created files.\n\ |
| 2294 | The argument MODE should be an integer; only the low 9 bits are used.\n\ |
| 2295 | This setting is inherited by subprocesses.") |
| 2296 | (mode) |
| 2297 | Lisp_Object mode; |
| 2298 | { |
| 2299 | CHECK_NUMBER (mode, 0); |
| 2300 | |
| 2301 | umask ((~ XINT (mode)) & 0777); |
| 2302 | |
| 2303 | return Qnil; |
| 2304 | } |
| 2305 | |
| 2306 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
| 2307 | "Return the default file protection for created files.\n\ |
| 2308 | The value is an integer.") |
| 2309 | () |
| 2310 | { |
| 2311 | int realmask; |
| 2312 | Lisp_Object value; |
| 2313 | |
| 2314 | realmask = umask (0); |
| 2315 | umask (realmask); |
| 2316 | |
| 2317 | XSET (value, Lisp_Int, (~ realmask) & 0777); |
| 2318 | return value; |
| 2319 | } |
| 2320 | |
| 2321 | #ifdef unix |
| 2322 | |
| 2323 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
| 2324 | "Tell Unix to finish all pending disk updates.") |
| 2325 | () |
| 2326 | { |
| 2327 | sync (); |
| 2328 | return Qnil; |
| 2329 | } |
| 2330 | |
| 2331 | #endif /* unix */ |
| 2332 | |
| 2333 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
| 2334 | "Return t if file FILE1 is newer than file FILE2.\n\ |
| 2335 | If FILE1 does not exist, the answer is nil;\n\ |
| 2336 | otherwise, if FILE2 does not exist, the answer is t.") |
| 2337 | (file1, file2) |
| 2338 | Lisp_Object file1, file2; |
| 2339 | { |
| 2340 | Lisp_Object abspath1, abspath2; |
| 2341 | struct stat st; |
| 2342 | int mtime1; |
| 2343 | Lisp_Object handler; |
| 2344 | struct gcpro gcpro1, gcpro2; |
| 2345 | |
| 2346 | CHECK_STRING (file1, 0); |
| 2347 | CHECK_STRING (file2, 0); |
| 2348 | |
| 2349 | abspath1 = Qnil; |
| 2350 | GCPRO2 (abspath1, file2); |
| 2351 | abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); |
| 2352 | abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); |
| 2353 | UNGCPRO; |
| 2354 | |
| 2355 | /* If the file name has special constructs in it, |
| 2356 | call the corresponding file handler. */ |
| 2357 | handler = Ffind_file_name_handler (abspath1); |
| 2358 | if (NILP (handler)) |
| 2359 | handler = Ffind_file_name_handler (abspath2); |
| 2360 | if (!NILP (handler)) |
| 2361 | return call3 (handler, Qfile_newer_than_file_p, abspath1, abspath2); |
| 2362 | |
| 2363 | if (stat (XSTRING (abspath1)->data, &st) < 0) |
| 2364 | return Qnil; |
| 2365 | |
| 2366 | mtime1 = st.st_mtime; |
| 2367 | |
| 2368 | if (stat (XSTRING (abspath2)->data, &st) < 0) |
| 2369 | return Qt; |
| 2370 | |
| 2371 | return (mtime1 > st.st_mtime) ? Qt : Qnil; |
| 2372 | } |
| 2373 | \f |
| 2374 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
| 2375 | 1, 4, 0, |
| 2376 | "Insert contents of file FILENAME after point.\n\ |
| 2377 | Returns list of absolute file name and length of data inserted.\n\ |
| 2378 | If second argument VISIT is non-nil, the buffer's visited filename\n\ |
| 2379 | and last save file modtime are set, and it is marked unmodified.\n\ |
| 2380 | If visiting and the file does not exist, visiting is completed\n\ |
| 2381 | before the error is signaled.\n\n\ |
| 2382 | The optional third and fourth arguments BEG and END\n\ |
| 2383 | specify what portion of the file to insert.\n\ |
| 2384 | If VISIT is non-nil, BEG and END must be nil.") |
| 2385 | (filename, visit, beg, end) |
| 2386 | Lisp_Object filename, visit, beg, end; |
| 2387 | { |
| 2388 | struct stat st; |
| 2389 | register int fd; |
| 2390 | register int inserted = 0; |
| 2391 | register int how_much; |
| 2392 | int count = specpdl_ptr - specpdl; |
| 2393 | struct gcpro gcpro1, gcpro2; |
| 2394 | Lisp_Object handler, val, insval; |
| 2395 | Lisp_Object p; |
| 2396 | int total; |
| 2397 | |
| 2398 | val = Qnil; |
| 2399 | p = Qnil; |
| 2400 | |
| 2401 | GCPRO2 (filename, p); |
| 2402 | if (!NILP (current_buffer->read_only)) |
| 2403 | Fbarf_if_buffer_read_only(); |
| 2404 | |
| 2405 | CHECK_STRING (filename, 0); |
| 2406 | filename = Fexpand_file_name (filename, Qnil); |
| 2407 | |
| 2408 | /* If the file name has special constructs in it, |
| 2409 | call the corresponding file handler. */ |
| 2410 | handler = Ffind_file_name_handler (filename); |
| 2411 | if (!NILP (handler)) |
| 2412 | { |
| 2413 | val = call5 (handler, Qinsert_file_contents, filename, visit, beg, end); |
| 2414 | goto handled; |
| 2415 | } |
| 2416 | |
| 2417 | fd = -1; |
| 2418 | |
| 2419 | #ifndef APOLLO |
| 2420 | if (stat (XSTRING (filename)->data, &st) < 0 |
| 2421 | || (fd = open (XSTRING (filename)->data, 0)) < 0) |
| 2422 | #else |
| 2423 | if ((fd = open (XSTRING (filename)->data, 0)) < 0 |
| 2424 | || fstat (fd, &st) < 0) |
| 2425 | #endif /* not APOLLO */ |
| 2426 | { |
| 2427 | if (fd >= 0) close (fd); |
| 2428 | if (NILP (visit)) |
| 2429 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2430 | st.st_mtime = -1; |
| 2431 | how_much = 0; |
| 2432 | goto notfound; |
| 2433 | } |
| 2434 | |
| 2435 | record_unwind_protect (close_file_unwind, make_number (fd)); |
| 2436 | |
| 2437 | #ifdef S_IFSOCK |
| 2438 | /* This code will need to be changed in order to work on named |
| 2439 | pipes, and it's probably just not worth it. So we should at |
| 2440 | least signal an error. */ |
| 2441 | if ((st.st_mode & S_IFMT) == S_IFSOCK) |
| 2442 | Fsignal (Qfile_error, |
| 2443 | Fcons (build_string ("reading from named pipe"), |
| 2444 | Fcons (filename, Qnil))); |
| 2445 | #endif |
| 2446 | |
| 2447 | /* Supposedly happens on VMS. */ |
| 2448 | if (st.st_size < 0) |
| 2449 | error ("File size is negative"); |
| 2450 | |
| 2451 | if (!NILP (beg) || !NILP (end)) |
| 2452 | if (!NILP (visit)) |
| 2453 | error ("Attempt to visit less than an entire file"); |
| 2454 | |
| 2455 | if (!NILP (beg)) |
| 2456 | CHECK_NUMBER (beg, 0); |
| 2457 | else |
| 2458 | XFASTINT (beg) = 0; |
| 2459 | |
| 2460 | if (!NILP (end)) |
| 2461 | CHECK_NUMBER (end, 0); |
| 2462 | else |
| 2463 | { |
| 2464 | XSETINT (end, st.st_size); |
| 2465 | if (XINT (end) != st.st_size) |
| 2466 | error ("maximum buffer size exceeded"); |
| 2467 | } |
| 2468 | |
| 2469 | total = XINT (end) - XINT (beg); |
| 2470 | |
| 2471 | { |
| 2472 | register Lisp_Object temp; |
| 2473 | |
| 2474 | /* Make sure point-max won't overflow after this insertion. */ |
| 2475 | XSET (temp, Lisp_Int, total); |
| 2476 | if (total != XINT (temp)) |
| 2477 | error ("maximum buffer size exceeded"); |
| 2478 | } |
| 2479 | |
| 2480 | if (NILP (visit) && total > 0) |
| 2481 | prepare_to_modify_buffer (point, point); |
| 2482 | |
| 2483 | move_gap (point); |
| 2484 | if (GAP_SIZE < total) |
| 2485 | make_gap (total - GAP_SIZE); |
| 2486 | |
| 2487 | if (XINT (beg) != 0) |
| 2488 | { |
| 2489 | if (lseek (fd, XINT (beg), 0) < 0) |
| 2490 | report_file_error ("Setting file position", Fcons (filename, Qnil)); |
| 2491 | } |
| 2492 | |
| 2493 | while (1) |
| 2494 | { |
| 2495 | int try = min (total - inserted, 64 << 10); |
| 2496 | int this; |
| 2497 | |
| 2498 | /* Allow quitting out of the actual I/O. */ |
| 2499 | immediate_quit = 1; |
| 2500 | QUIT; |
| 2501 | this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try); |
| 2502 | immediate_quit = 0; |
| 2503 | |
| 2504 | if (this <= 0) |
| 2505 | { |
| 2506 | how_much = this; |
| 2507 | break; |
| 2508 | } |
| 2509 | |
| 2510 | GPT += this; |
| 2511 | GAP_SIZE -= this; |
| 2512 | ZV += this; |
| 2513 | Z += this; |
| 2514 | inserted += this; |
| 2515 | } |
| 2516 | |
| 2517 | if (inserted > 0) |
| 2518 | { |
| 2519 | record_insert (point, inserted); |
| 2520 | |
| 2521 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
| 2522 | offset_intervals (current_buffer, point, inserted); |
| 2523 | MODIFF++; |
| 2524 | } |
| 2525 | |
| 2526 | close (fd); |
| 2527 | |
| 2528 | /* Discard the unwind protect */ |
| 2529 | specpdl_ptr = specpdl + count; |
| 2530 | |
| 2531 | if (how_much < 0) |
| 2532 | error ("IO error reading %s: %s", |
| 2533 | XSTRING (filename)->data, err_str (errno)); |
| 2534 | |
| 2535 | notfound: |
| 2536 | handled: |
| 2537 | |
| 2538 | if (!NILP (visit)) |
| 2539 | { |
| 2540 | current_buffer->undo_list = Qnil; |
| 2541 | #ifdef APOLLO |
| 2542 | stat (XSTRING (filename)->data, &st); |
| 2543 | #endif |
| 2544 | |
| 2545 | if (NILP (handler)) |
| 2546 | { |
| 2547 | current_buffer->modtime = st.st_mtime; |
| 2548 | current_buffer->filename = filename; |
| 2549 | } |
| 2550 | |
| 2551 | current_buffer->save_modified = MODIFF; |
| 2552 | current_buffer->auto_save_modified = MODIFF; |
| 2553 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2554 | #ifdef CLASH_DETECTION |
| 2555 | if (NILP (handler)) |
| 2556 | { |
| 2557 | if (!NILP (current_buffer->filename)) |
| 2558 | unlock_file (current_buffer->filename); |
| 2559 | unlock_file (filename); |
| 2560 | } |
| 2561 | #endif /* CLASH_DETECTION */ |
| 2562 | /* If visiting nonexistent file, return nil. */ |
| 2563 | if (current_buffer->modtime == -1) |
| 2564 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2565 | } |
| 2566 | |
| 2567 | if (inserted > 0 && NILP (visit) && total > 0) |
| 2568 | signal_after_change (point, 0, inserted); |
| 2569 | |
| 2570 | if (inserted > 0) |
| 2571 | { |
| 2572 | p = Vafter_insert_file_functions; |
| 2573 | while (!NILP (p)) |
| 2574 | { |
| 2575 | insval = call1 (Fcar (p), make_number (inserted)); |
| 2576 | if (!NILP (insval)) |
| 2577 | { |
| 2578 | CHECK_NUMBER (insval, 0); |
| 2579 | inserted = XFASTINT (insval); |
| 2580 | } |
| 2581 | QUIT; |
| 2582 | p = Fcdr (p); |
| 2583 | } |
| 2584 | } |
| 2585 | |
| 2586 | if (!NILP (val)) |
| 2587 | RETURN_UNGCPRO (val); |
| 2588 | RETURN_UNGCPRO (Fcons (filename, |
| 2589 | Fcons (make_number (inserted), |
| 2590 | Qnil))); |
| 2591 | } |
| 2592 | \f |
| 2593 | static Lisp_Object build_annotations (); |
| 2594 | |
| 2595 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5, |
| 2596 | "r\nFWrite region to file: ", |
| 2597 | "Write current region into specified file.\n\ |
| 2598 | When called from a program, takes three arguments:\n\ |
| 2599 | START, END and FILENAME. START and END are buffer positions.\n\ |
| 2600 | Optional fourth argument APPEND if non-nil means\n\ |
| 2601 | append to existing file contents (if any).\n\ |
| 2602 | Optional fifth argument VISIT if t means\n\ |
| 2603 | set the last-save-file-modtime of buffer to this file's modtime\n\ |
| 2604 | and mark buffer not modified.\n\ |
| 2605 | If VISIT is a string, it is a second file name;\n\ |
| 2606 | the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\ |
| 2607 | VISIT is also the file name to lock and unlock for clash detection.\n\ |
| 2608 | If VISIT is neither t nor nil nor a string,\n\ |
| 2609 | that means do not print the \"Wrote file\" message.\n\ |
| 2610 | Kludgy feature: if START is a string, then that string is written\n\ |
| 2611 | to the file, instead of any buffer contents, and END is ignored.") |
| 2612 | (start, end, filename, append, visit) |
| 2613 | Lisp_Object start, end, filename, append, visit; |
| 2614 | { |
| 2615 | register int desc; |
| 2616 | int failure; |
| 2617 | int save_errno; |
| 2618 | unsigned char *fn; |
| 2619 | struct stat st; |
| 2620 | int tem; |
| 2621 | int count = specpdl_ptr - specpdl; |
| 2622 | #ifdef VMS |
| 2623 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ |
| 2624 | #endif /* VMS */ |
| 2625 | Lisp_Object handler; |
| 2626 | Lisp_Object visit_file; |
| 2627 | Lisp_Object annotations; |
| 2628 | int visiting, quietly; |
| 2629 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2630 | |
| 2631 | /* Special kludge to simplify auto-saving */ |
| 2632 | if (NILP (start)) |
| 2633 | { |
| 2634 | XFASTINT (start) = BEG; |
| 2635 | XFASTINT (end) = Z; |
| 2636 | } |
| 2637 | else if (XTYPE (start) != Lisp_String) |
| 2638 | validate_region (&start, &end); |
| 2639 | |
| 2640 | filename = Fexpand_file_name (filename, Qnil); |
| 2641 | if (XTYPE (visit) == Lisp_String) |
| 2642 | visit_file = Fexpand_file_name (visit, Qnil); |
| 2643 | else |
| 2644 | visit_file = filename; |
| 2645 | |
| 2646 | visiting = (EQ (visit, Qt) || XTYPE (visit) == Lisp_String); |
| 2647 | quietly = !NILP (visit); |
| 2648 | |
| 2649 | annotations = Qnil; |
| 2650 | |
| 2651 | GCPRO4 (start, filename, annotations, visit_file); |
| 2652 | |
| 2653 | /* If the file name has special constructs in it, |
| 2654 | call the corresponding file handler. */ |
| 2655 | handler = Ffind_file_name_handler (filename); |
| 2656 | |
| 2657 | if (!NILP (handler)) |
| 2658 | { |
| 2659 | Lisp_Object val; |
| 2660 | val = call6 (handler, Qwrite_region, start, end, |
| 2661 | filename, append, visit); |
| 2662 | |
| 2663 | if (visiting) |
| 2664 | { |
| 2665 | current_buffer->save_modified = MODIFF; |
| 2666 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2667 | current_buffer->filename = visit_file; |
| 2668 | } |
| 2669 | UNGCPRO; |
| 2670 | return val; |
| 2671 | } |
| 2672 | |
| 2673 | annotations = build_annotations (start, end); |
| 2674 | |
| 2675 | #ifdef CLASH_DETECTION |
| 2676 | if (!auto_saving) |
| 2677 | lock_file (visit_file); |
| 2678 | #endif /* CLASH_DETECTION */ |
| 2679 | |
| 2680 | fn = XSTRING (filename)->data; |
| 2681 | desc = -1; |
| 2682 | if (!NILP (append)) |
| 2683 | desc = open (fn, O_WRONLY); |
| 2684 | |
| 2685 | if (desc < 0) |
| 2686 | #ifdef VMS |
| 2687 | if (auto_saving) /* Overwrite any previous version of autosave file */ |
| 2688 | { |
| 2689 | vms_truncate (fn); /* if fn exists, truncate to zero length */ |
| 2690 | desc = open (fn, O_RDWR); |
| 2691 | if (desc < 0) |
| 2692 | desc = creat_copy_attrs (XTYPE (current_buffer->filename) == Lisp_String |
| 2693 | ? XSTRING (current_buffer->filename)->data : 0, |
| 2694 | fn); |
| 2695 | } |
| 2696 | else /* Write to temporary name and rename if no errors */ |
| 2697 | { |
| 2698 | Lisp_Object temp_name; |
| 2699 | temp_name = Ffile_name_directory (filename); |
| 2700 | |
| 2701 | if (!NILP (temp_name)) |
| 2702 | { |
| 2703 | temp_name = Fmake_temp_name (concat2 (temp_name, |
| 2704 | build_string ("$$SAVE$$"))); |
| 2705 | fname = XSTRING (filename)->data; |
| 2706 | fn = XSTRING (temp_name)->data; |
| 2707 | desc = creat_copy_attrs (fname, fn); |
| 2708 | if (desc < 0) |
| 2709 | { |
| 2710 | /* If we can't open the temporary file, try creating a new |
| 2711 | version of the original file. VMS "creat" creates a |
| 2712 | new version rather than truncating an existing file. */ |
| 2713 | fn = fname; |
| 2714 | fname = 0; |
| 2715 | desc = creat (fn, 0666); |
| 2716 | #if 0 /* This can clobber an existing file and fail to replace it, |
| 2717 | if the user runs out of space. */ |
| 2718 | if (desc < 0) |
| 2719 | { |
| 2720 | /* We can't make a new version; |
| 2721 | try to truncate and rewrite existing version if any. */ |
| 2722 | vms_truncate (fn); |
| 2723 | desc = open (fn, O_RDWR); |
| 2724 | } |
| 2725 | #endif |
| 2726 | } |
| 2727 | } |
| 2728 | else |
| 2729 | desc = creat (fn, 0666); |
| 2730 | } |
| 2731 | #else /* not VMS */ |
| 2732 | desc = creat (fn, auto_saving ? auto_save_mode_bits : 0666); |
| 2733 | #endif /* not VMS */ |
| 2734 | |
| 2735 | UNGCPRO; |
| 2736 | |
| 2737 | if (desc < 0) |
| 2738 | { |
| 2739 | #ifdef CLASH_DETECTION |
| 2740 | save_errno = errno; |
| 2741 | if (!auto_saving) unlock_file (visit_file); |
| 2742 | errno = save_errno; |
| 2743 | #endif /* CLASH_DETECTION */ |
| 2744 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
| 2745 | } |
| 2746 | |
| 2747 | record_unwind_protect (close_file_unwind, make_number (desc)); |
| 2748 | |
| 2749 | if (!NILP (append)) |
| 2750 | if (lseek (desc, 0, 2) < 0) |
| 2751 | { |
| 2752 | #ifdef CLASH_DETECTION |
| 2753 | if (!auto_saving) unlock_file (visit_file); |
| 2754 | #endif /* CLASH_DETECTION */ |
| 2755 | report_file_error ("Lseek error", Fcons (filename, Qnil)); |
| 2756 | } |
| 2757 | |
| 2758 | #ifdef VMS |
| 2759 | /* |
| 2760 | * Kludge Warning: The VMS C RTL likes to insert carriage returns |
| 2761 | * if we do writes that don't end with a carriage return. Furthermore |
| 2762 | * it cannot handle writes of more then 16K. The modified |
| 2763 | * version of "sys_write" in SYSDEP.C (see comment there) copes with |
| 2764 | * this EXCEPT for the last record (iff it doesn't end with a carriage |
| 2765 | * return). This implies that if your buffer doesn't end with a carriage |
| 2766 | * return, you get one free... tough. However it also means that if |
| 2767 | * we make two calls to sys_write (a la the following code) you can |
| 2768 | * get one at the gap as well. The easiest way to fix this (honest) |
| 2769 | * is to move the gap to the next newline (or the end of the buffer). |
| 2770 | * Thus this change. |
| 2771 | * |
| 2772 | * Yech! |
| 2773 | */ |
| 2774 | if (GPT > BEG && GPT_ADDR[-1] != '\n') |
| 2775 | move_gap (find_next_newline (GPT, 1)); |
| 2776 | #endif |
| 2777 | |
| 2778 | failure = 0; |
| 2779 | immediate_quit = 1; |
| 2780 | |
| 2781 | if (XTYPE (start) == Lisp_String) |
| 2782 | { |
| 2783 | failure = 0 > a_write (desc, XSTRING (start)->data, |
| 2784 | XSTRING (start)->size, 0, &annotations); |
| 2785 | save_errno = errno; |
| 2786 | } |
| 2787 | else if (XINT (start) != XINT (end)) |
| 2788 | { |
| 2789 | int nwritten = 0; |
| 2790 | if (XINT (start) < GPT) |
| 2791 | { |
| 2792 | register int end1 = XINT (end); |
| 2793 | tem = XINT (start); |
| 2794 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), |
| 2795 | min (GPT, end1) - tem, tem, &annotations); |
| 2796 | nwritten += min (GPT, end1) - tem; |
| 2797 | save_errno = errno; |
| 2798 | } |
| 2799 | |
| 2800 | if (XINT (end) > GPT && !failure) |
| 2801 | { |
| 2802 | tem = XINT (start); |
| 2803 | tem = max (tem, GPT); |
| 2804 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), XINT (end) - tem, |
| 2805 | tem, &annotations); |
| 2806 | nwritten += XINT (end) - tem; |
| 2807 | save_errno = errno; |
| 2808 | } |
| 2809 | |
| 2810 | if (nwritten == 0) |
| 2811 | { |
| 2812 | /* If file was empty, still need to write the annotations */ |
| 2813 | failure = 0 > a_write (desc, "", 0, XINT (start), &annotations); |
| 2814 | save_errno = errno; |
| 2815 | } |
| 2816 | } |
| 2817 | |
| 2818 | immediate_quit = 0; |
| 2819 | |
| 2820 | #ifdef HAVE_FSYNC |
| 2821 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
| 2822 | Disk full in NFS may be reported here. */ |
| 2823 | /* mib says that closing the file will try to write as fast as NFS can do |
| 2824 | it, and that means the fsync here is not crucial for autosave files. */ |
| 2825 | if (!auto_saving && fsync (desc) < 0) |
| 2826 | failure = 1, save_errno = errno; |
| 2827 | #endif |
| 2828 | |
| 2829 | /* Spurious "file has changed on disk" warnings have been |
| 2830 | observed on Suns as well. |
| 2831 | It seems that `close' can change the modtime, under nfs. |
| 2832 | |
| 2833 | (This has supposedly been fixed in Sunos 4, |
| 2834 | but who knows about all the other machines with NFS?) */ |
| 2835 | #if 0 |
| 2836 | |
| 2837 | /* On VMS and APOLLO, must do the stat after the close |
| 2838 | since closing changes the modtime. */ |
| 2839 | #ifndef VMS |
| 2840 | #ifndef APOLLO |
| 2841 | /* Recall that #if defined does not work on VMS. */ |
| 2842 | #define FOO |
| 2843 | fstat (desc, &st); |
| 2844 | #endif |
| 2845 | #endif |
| 2846 | #endif |
| 2847 | |
| 2848 | /* NFS can report a write failure now. */ |
| 2849 | if (close (desc) < 0) |
| 2850 | failure = 1, save_errno = errno; |
| 2851 | |
| 2852 | #ifdef VMS |
| 2853 | /* If we wrote to a temporary name and had no errors, rename to real name. */ |
| 2854 | if (fname) |
| 2855 | { |
| 2856 | if (!failure) |
| 2857 | failure = (rename (fn, fname) != 0), save_errno = errno; |
| 2858 | fn = fname; |
| 2859 | } |
| 2860 | #endif /* VMS */ |
| 2861 | |
| 2862 | #ifndef FOO |
| 2863 | stat (fn, &st); |
| 2864 | #endif |
| 2865 | /* Discard the unwind protect */ |
| 2866 | specpdl_ptr = specpdl + count; |
| 2867 | |
| 2868 | #ifdef CLASH_DETECTION |
| 2869 | if (!auto_saving) |
| 2870 | unlock_file (visit_file); |
| 2871 | #endif /* CLASH_DETECTION */ |
| 2872 | |
| 2873 | /* Do this before reporting IO error |
| 2874 | to avoid a "file has changed on disk" warning on |
| 2875 | next attempt to save. */ |
| 2876 | if (visiting) |
| 2877 | current_buffer->modtime = st.st_mtime; |
| 2878 | |
| 2879 | if (failure) |
| 2880 | error ("IO error writing %s: %s", fn, err_str (save_errno)); |
| 2881 | |
| 2882 | if (visiting) |
| 2883 | { |
| 2884 | current_buffer->save_modified = MODIFF; |
| 2885 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2886 | current_buffer->filename = visit_file; |
| 2887 | } |
| 2888 | else if (quietly) |
| 2889 | return Qnil; |
| 2890 | |
| 2891 | if (!auto_saving) |
| 2892 | message ("Wrote %s", XSTRING (visit_file)->data); |
| 2893 | |
| 2894 | return Qnil; |
| 2895 | } |
| 2896 | |
| 2897 | Lisp_Object merge (); |
| 2898 | |
| 2899 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, |
| 2900 | "Return t if (car A) is numerically less than (car B).") |
| 2901 | (a, b) |
| 2902 | Lisp_Object a, b; |
| 2903 | { |
| 2904 | return Flss (Fcar (a), Fcar (b)); |
| 2905 | } |
| 2906 | |
| 2907 | /* Build the complete list of annotations appropriate for writing out |
| 2908 | the text between START and END, by calling all the functions in |
| 2909 | write-region-annotate-functions and merging the lists they return. */ |
| 2910 | |
| 2911 | static Lisp_Object |
| 2912 | build_annotations (start, end) |
| 2913 | Lisp_Object start, end; |
| 2914 | { |
| 2915 | Lisp_Object annotations; |
| 2916 | Lisp_Object p, res; |
| 2917 | struct gcpro gcpro1, gcpro2; |
| 2918 | |
| 2919 | annotations = Qnil; |
| 2920 | p = Vwrite_region_annotate_functions; |
| 2921 | GCPRO2 (annotations, p); |
| 2922 | while (!NILP (p)) |
| 2923 | { |
| 2924 | res = call2 (Fcar (p), start, end); |
| 2925 | Flength (res); /* Check basic validity of return value */ |
| 2926 | annotations = merge (annotations, res, Qcar_less_than_car); |
| 2927 | p = Fcdr (p); |
| 2928 | } |
| 2929 | UNGCPRO; |
| 2930 | return annotations; |
| 2931 | } |
| 2932 | |
| 2933 | /* Write to descriptor DESC the LEN characters starting at ADDR, |
| 2934 | assuming they start at position POS in the buffer. |
| 2935 | Intersperse with them the annotations from *ANNOT |
| 2936 | (those which fall within the range of positions POS to POS + LEN), |
| 2937 | each at its appropriate position. |
| 2938 | |
| 2939 | Modify *ANNOT by discarding elements as we output them. |
| 2940 | The return value is negative in case of system call failure. */ |
| 2941 | |
| 2942 | int |
| 2943 | a_write (desc, addr, len, pos, annot) |
| 2944 | int desc; |
| 2945 | register char *addr; |
| 2946 | register int len; |
| 2947 | int pos; |
| 2948 | Lisp_Object *annot; |
| 2949 | { |
| 2950 | Lisp_Object tem; |
| 2951 | int nextpos; |
| 2952 | int lastpos = pos + len; |
| 2953 | |
| 2954 | while (1) |
| 2955 | { |
| 2956 | tem = Fcar_safe (Fcar (*annot)); |
| 2957 | if (INTEGERP (tem) && XINT (tem) >= pos && XFASTINT (tem) <= lastpos) |
| 2958 | nextpos = XFASTINT (tem); |
| 2959 | else |
| 2960 | return e_write (desc, addr, lastpos - pos); |
| 2961 | if (nextpos > pos) |
| 2962 | { |
| 2963 | if (0 > e_write (desc, addr, nextpos - pos)) |
| 2964 | return -1; |
| 2965 | addr += nextpos - pos; |
| 2966 | pos = nextpos; |
| 2967 | } |
| 2968 | tem = Fcdr (Fcar (*annot)); |
| 2969 | if (STRINGP (tem)) |
| 2970 | { |
| 2971 | if (0 > e_write (desc, XSTRING (tem)->data, XSTRING (tem)->size)) |
| 2972 | return -1; |
| 2973 | } |
| 2974 | *annot = Fcdr (*annot); |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | int |
| 2979 | e_write (desc, addr, len) |
| 2980 | int desc; |
| 2981 | register char *addr; |
| 2982 | register int len; |
| 2983 | { |
| 2984 | char buf[16 * 1024]; |
| 2985 | register char *p, *end; |
| 2986 | |
| 2987 | if (!EQ (current_buffer->selective_display, Qt)) |
| 2988 | return write (desc, addr, len) - len; |
| 2989 | else |
| 2990 | { |
| 2991 | p = buf; |
| 2992 | end = p + sizeof buf; |
| 2993 | while (len--) |
| 2994 | { |
| 2995 | if (p == end) |
| 2996 | { |
| 2997 | if (write (desc, buf, sizeof buf) != sizeof buf) |
| 2998 | return -1; |
| 2999 | p = buf; |
| 3000 | } |
| 3001 | *p = *addr++; |
| 3002 | if (*p++ == '\015') |
| 3003 | p[-1] = '\n'; |
| 3004 | } |
| 3005 | if (p != buf) |
| 3006 | if (write (desc, buf, p - buf) != p - buf) |
| 3007 | return -1; |
| 3008 | } |
| 3009 | return 0; |
| 3010 | } |
| 3011 | |
| 3012 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
| 3013 | Sverify_visited_file_modtime, 1, 1, 0, |
| 3014 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ |
| 3015 | This means that the file has not been changed since it was visited or saved.") |
| 3016 | (buf) |
| 3017 | Lisp_Object buf; |
| 3018 | { |
| 3019 | struct buffer *b; |
| 3020 | struct stat st; |
| 3021 | Lisp_Object handler; |
| 3022 | |
| 3023 | CHECK_BUFFER (buf, 0); |
| 3024 | b = XBUFFER (buf); |
| 3025 | |
| 3026 | if (XTYPE (b->filename) != Lisp_String) return Qt; |
| 3027 | if (b->modtime == 0) return Qt; |
| 3028 | |
| 3029 | /* If the file name has special constructs in it, |
| 3030 | call the corresponding file handler. */ |
| 3031 | handler = Ffind_file_name_handler (b->filename); |
| 3032 | if (!NILP (handler)) |
| 3033 | return call2 (handler, Qverify_visited_file_modtime, buf); |
| 3034 | |
| 3035 | if (stat (XSTRING (b->filename)->data, &st) < 0) |
| 3036 | { |
| 3037 | /* If the file doesn't exist now and didn't exist before, |
| 3038 | we say that it isn't modified, provided the error is a tame one. */ |
| 3039 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) |
| 3040 | st.st_mtime = -1; |
| 3041 | else |
| 3042 | st.st_mtime = 0; |
| 3043 | } |
| 3044 | if (st.st_mtime == b->modtime |
| 3045 | /* If both are positive, accept them if they are off by one second. */ |
| 3046 | || (st.st_mtime > 0 && b->modtime > 0 |
| 3047 | && (st.st_mtime == b->modtime + 1 |
| 3048 | || st.st_mtime == b->modtime - 1))) |
| 3049 | return Qt; |
| 3050 | return Qnil; |
| 3051 | } |
| 3052 | |
| 3053 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, |
| 3054 | Sclear_visited_file_modtime, 0, 0, 0, |
| 3055 | "Clear out records of last mod time of visited file.\n\ |
| 3056 | Next attempt to save will certainly not complain of a discrepancy.") |
| 3057 | () |
| 3058 | { |
| 3059 | current_buffer->modtime = 0; |
| 3060 | return Qnil; |
| 3061 | } |
| 3062 | |
| 3063 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
| 3064 | Svisited_file_modtime, 0, 0, 0, |
| 3065 | "Return the current buffer's recorded visited file modification time.\n\ |
| 3066 | The value is a list of the form (HIGH . LOW), like the time values\n\ |
| 3067 | that `file-attributes' returns.") |
| 3068 | () |
| 3069 | { |
| 3070 | return long_to_cons (current_buffer->modtime); |
| 3071 | } |
| 3072 | |
| 3073 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
| 3074 | Sset_visited_file_modtime, 0, 1, 0, |
| 3075 | "Update buffer's recorded modification time from the visited file's time.\n\ |
| 3076 | Useful if the buffer was not read from the file normally\n\ |
| 3077 | or if the file itself has been changed for some known benign reason.\n\ |
| 3078 | An argument specifies the modification time value to use\n\ |
| 3079 | \(instead of that of the visited file), in the form of a list\n\ |
| 3080 | \(HIGH . LOW) or (HIGH LOW).") |
| 3081 | (time_list) |
| 3082 | Lisp_Object time_list; |
| 3083 | { |
| 3084 | if (!NILP (time_list)) |
| 3085 | current_buffer->modtime = cons_to_long (time_list); |
| 3086 | else |
| 3087 | { |
| 3088 | register Lisp_Object filename; |
| 3089 | struct stat st; |
| 3090 | Lisp_Object handler; |
| 3091 | |
| 3092 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
| 3093 | |
| 3094 | /* If the file name has special constructs in it, |
| 3095 | call the corresponding file handler. */ |
| 3096 | handler = Ffind_file_name_handler (filename); |
| 3097 | if (!NILP (handler)) |
| 3098 | /* The handler can find the file name the same way we did. */ |
| 3099 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
| 3100 | else if (stat (XSTRING (filename)->data, &st) >= 0) |
| 3101 | current_buffer->modtime = st.st_mtime; |
| 3102 | } |
| 3103 | |
| 3104 | return Qnil; |
| 3105 | } |
| 3106 | \f |
| 3107 | Lisp_Object |
| 3108 | auto_save_error () |
| 3109 | { |
| 3110 | unsigned char *name = XSTRING (current_buffer->name)->data; |
| 3111 | |
| 3112 | ring_bell (); |
| 3113 | message ("Autosaving...error for %s", name); |
| 3114 | Fsleep_for (make_number (1), Qnil); |
| 3115 | message ("Autosaving...error!for %s", name); |
| 3116 | Fsleep_for (make_number (1), Qnil); |
| 3117 | message ("Autosaving...error for %s", name); |
| 3118 | Fsleep_for (make_number (1), Qnil); |
| 3119 | return Qnil; |
| 3120 | } |
| 3121 | |
| 3122 | Lisp_Object |
| 3123 | auto_save_1 () |
| 3124 | { |
| 3125 | unsigned char *fn; |
| 3126 | struct stat st; |
| 3127 | |
| 3128 | /* Get visited file's mode to become the auto save file's mode. */ |
| 3129 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) |
| 3130 | /* But make sure we can overwrite it later! */ |
| 3131 | auto_save_mode_bits = st.st_mode | 0600; |
| 3132 | else |
| 3133 | auto_save_mode_bits = 0666; |
| 3134 | |
| 3135 | return |
| 3136 | Fwrite_region (Qnil, Qnil, |
| 3137 | current_buffer->auto_save_file_name, |
| 3138 | Qnil, Qlambda); |
| 3139 | } |
| 3140 | |
| 3141 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
| 3142 | "Auto-save all buffers that need it.\n\ |
| 3143 | This is all buffers that have auto-saving enabled\n\ |
| 3144 | and are changed since last auto-saved.\n\ |
| 3145 | Auto-saving writes the buffer into a file\n\ |
| 3146 | so that your editing is not lost if the system crashes.\n\ |
| 3147 | This file is not the file you visited; that changes only when you save.\n\n\ |
| 3148 | Non-nil first argument means do not print any message if successful.\n\ |
| 3149 | Non-nil second argument means save only current buffer.") |
| 3150 | (no_message, current_only) |
| 3151 | Lisp_Object no_message, current_only; |
| 3152 | { |
| 3153 | struct buffer *old = current_buffer, *b; |
| 3154 | Lisp_Object tail, buf; |
| 3155 | int auto_saved = 0; |
| 3156 | char *omessage = echo_area_glyphs; |
| 3157 | extern int minibuf_level; |
| 3158 | int do_handled_files; |
| 3159 | Lisp_Object oquit; |
| 3160 | |
| 3161 | /* Ordinarily don't quit within this function, |
| 3162 | but don't make it impossible to quit (in case we get hung in I/O). */ |
| 3163 | oquit = Vquit_flag; |
| 3164 | Vquit_flag = Qnil; |
| 3165 | |
| 3166 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables |
| 3167 | point to non-strings reached from Vbuffer_alist. */ |
| 3168 | |
| 3169 | auto_saving = 1; |
| 3170 | if (minibuf_level) |
| 3171 | no_message = Qt; |
| 3172 | |
| 3173 | /* Vrun_hooks is nil before emacs is dumped, and inc-vers.el will |
| 3174 | eventually call do-auto-save, so don't err here in that case. */ |
| 3175 | if (!NILP (Vrun_hooks)) |
| 3176 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
| 3177 | |
| 3178 | /* First, save all files which don't have handlers. If Emacs is |
| 3179 | crashing, the handlers may tweak what is causing Emacs to crash |
| 3180 | in the first place, and it would be a shame if Emacs failed to |
| 3181 | autosave perfectly ordinary files because it couldn't handle some |
| 3182 | ange-ftp'd file. */ |
| 3183 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
| 3184 | for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons; |
| 3185 | tail = XCONS (tail)->cdr) |
| 3186 | { |
| 3187 | buf = XCONS (XCONS (tail)->car)->cdr; |
| 3188 | b = XBUFFER (buf); |
| 3189 | |
| 3190 | if (!NILP (current_only) |
| 3191 | && b != current_buffer) |
| 3192 | continue; |
| 3193 | |
| 3194 | /* Check for auto save enabled |
| 3195 | and file changed since last auto save |
| 3196 | and file changed since last real save. */ |
| 3197 | if (XTYPE (b->auto_save_file_name) == Lisp_String |
| 3198 | && b->save_modified < BUF_MODIFF (b) |
| 3199 | && b->auto_save_modified < BUF_MODIFF (b) |
| 3200 | && (do_handled_files |
| 3201 | || NILP (Ffind_file_name_handler (b->auto_save_file_name)))) |
| 3202 | { |
| 3203 | if ((XFASTINT (b->save_length) * 10 |
| 3204 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
| 3205 | /* A short file is likely to change a large fraction; |
| 3206 | spare the user annoying messages. */ |
| 3207 | && XFASTINT (b->save_length) > 5000 |
| 3208 | /* These messages are frequent and annoying for `*mail*'. */ |
| 3209 | && !EQ (b->filename, Qnil) |
| 3210 | && NILP (no_message)) |
| 3211 | { |
| 3212 | /* It has shrunk too much; turn off auto-saving here. */ |
| 3213 | message ("Buffer %s has shrunk a lot; auto save turned off there", |
| 3214 | XSTRING (b->name)->data); |
| 3215 | /* User can reenable saving with M-x auto-save. */ |
| 3216 | b->auto_save_file_name = Qnil; |
| 3217 | /* Prevent warning from repeating if user does so. */ |
| 3218 | XFASTINT (b->save_length) = 0; |
| 3219 | Fsleep_for (make_number (1), Qnil); |
| 3220 | continue; |
| 3221 | } |
| 3222 | set_buffer_internal (b); |
| 3223 | if (!auto_saved && NILP (no_message)) |
| 3224 | message1 ("Auto-saving..."); |
| 3225 | internal_condition_case (auto_save_1, Qt, auto_save_error); |
| 3226 | auto_saved++; |
| 3227 | b->auto_save_modified = BUF_MODIFF (b); |
| 3228 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3229 | set_buffer_internal (old); |
| 3230 | } |
| 3231 | } |
| 3232 | |
| 3233 | /* Prevent another auto save till enough input events come in. */ |
| 3234 | record_auto_save (); |
| 3235 | |
| 3236 | if (auto_saved && NILP (no_message)) |
| 3237 | message1 (omessage ? omessage : "Auto-saving...done"); |
| 3238 | |
| 3239 | Vquit_flag = oquit; |
| 3240 | |
| 3241 | auto_saving = 0; |
| 3242 | return Qnil; |
| 3243 | } |
| 3244 | |
| 3245 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, |
| 3246 | Sset_buffer_auto_saved, 0, 0, 0, |
| 3247 | "Mark current buffer as auto-saved with its current text.\n\ |
| 3248 | No auto-save file will be written until the buffer changes again.") |
| 3249 | () |
| 3250 | { |
| 3251 | current_buffer->auto_save_modified = MODIFF; |
| 3252 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3253 | return Qnil; |
| 3254 | } |
| 3255 | |
| 3256 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, |
| 3257 | 0, 0, 0, |
| 3258 | "Return t if buffer has been auto-saved since last read in or saved.") |
| 3259 | () |
| 3260 | { |
| 3261 | return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil; |
| 3262 | } |
| 3263 | \f |
| 3264 | /* Reading and completing file names */ |
| 3265 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); |
| 3266 | |
| 3267 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, |
| 3268 | 3, 3, 0, |
| 3269 | "Internal subroutine for read-file-name. Do not call this.") |
| 3270 | (string, dir, action) |
| 3271 | Lisp_Object string, dir, action; |
| 3272 | /* action is nil for complete, t for return list of completions, |
| 3273 | lambda for verify final value */ |
| 3274 | { |
| 3275 | Lisp_Object name, specdir, realdir, val, orig_string; |
| 3276 | int changed; |
| 3277 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3278 | |
| 3279 | realdir = dir; |
| 3280 | name = string; |
| 3281 | orig_string = Qnil; |
| 3282 | specdir = Qnil; |
| 3283 | changed = 0; |
| 3284 | /* No need to protect ACTION--we only compare it with t and nil. */ |
| 3285 | GCPRO4 (string, realdir, name, specdir); |
| 3286 | |
| 3287 | if (XSTRING (string)->size == 0) |
| 3288 | { |
| 3289 | if (EQ (action, Qlambda)) |
| 3290 | { |
| 3291 | UNGCPRO; |
| 3292 | return Qnil; |
| 3293 | } |
| 3294 | } |
| 3295 | else |
| 3296 | { |
| 3297 | orig_string = string; |
| 3298 | string = Fsubstitute_in_file_name (string); |
| 3299 | changed = NILP (Fstring_equal (string, orig_string)); |
| 3300 | name = Ffile_name_nondirectory (string); |
| 3301 | val = Ffile_name_directory (string); |
| 3302 | if (! NILP (val)) |
| 3303 | realdir = Fexpand_file_name (val, realdir); |
| 3304 | } |
| 3305 | |
| 3306 | if (NILP (action)) |
| 3307 | { |
| 3308 | specdir = Ffile_name_directory (string); |
| 3309 | val = Ffile_name_completion (name, realdir); |
| 3310 | UNGCPRO; |
| 3311 | if (XTYPE (val) != Lisp_String) |
| 3312 | { |
| 3313 | if (changed) |
| 3314 | return string; |
| 3315 | return val; |
| 3316 | } |
| 3317 | |
| 3318 | if (!NILP (specdir)) |
| 3319 | val = concat2 (specdir, val); |
| 3320 | #ifndef VMS |
| 3321 | { |
| 3322 | register unsigned char *old, *new; |
| 3323 | register int n; |
| 3324 | int osize, count; |
| 3325 | |
| 3326 | osize = XSTRING (val)->size; |
| 3327 | /* Quote "$" as "$$" to get it past substitute-in-file-name */ |
| 3328 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) |
| 3329 | if (*old++ == '$') count++; |
| 3330 | if (count > 0) |
| 3331 | { |
| 3332 | old = XSTRING (val)->data; |
| 3333 | val = Fmake_string (make_number (osize + count), make_number (0)); |
| 3334 | new = XSTRING (val)->data; |
| 3335 | for (n = osize; n > 0; n--) |
| 3336 | if (*old != '$') |
| 3337 | *new++ = *old++; |
| 3338 | else |
| 3339 | { |
| 3340 | *new++ = '$'; |
| 3341 | *new++ = '$'; |
| 3342 | old++; |
| 3343 | } |
| 3344 | } |
| 3345 | } |
| 3346 | #endif /* Not VMS */ |
| 3347 | return val; |
| 3348 | } |
| 3349 | UNGCPRO; |
| 3350 | |
| 3351 | if (EQ (action, Qt)) |
| 3352 | return Ffile_name_all_completions (name, realdir); |
| 3353 | /* Only other case actually used is ACTION = lambda */ |
| 3354 | #ifdef VMS |
| 3355 | /* Supposedly this helps commands such as `cd' that read directory names, |
| 3356 | but can someone explain how it helps them? -- RMS */ |
| 3357 | if (XSTRING (name)->size == 0) |
| 3358 | return Qt; |
| 3359 | #endif /* VMS */ |
| 3360 | return Ffile_exists_p (string); |
| 3361 | } |
| 3362 | |
| 3363 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3364 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ |
| 3365 | Value is not expanded---you must call `expand-file-name' yourself.\n\ |
| 3366 | Default name to DEFAULT if user enters a null string.\n\ |
| 3367 | (If DEFAULT is omitted, the visited file name is used.)\n\ |
| 3368 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
| 3369 | Non-nil and non-t means also require confirmation after completion.\n\ |
| 3370 | Fifth arg INITIAL specifies text to start with.\n\ |
| 3371 | DIR defaults to current buffer's directory default.") |
| 3372 | (prompt, dir, defalt, mustmatch, initial) |
| 3373 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3374 | { |
| 3375 | Lisp_Object val, insdef, insdef1, tem; |
| 3376 | struct gcpro gcpro1, gcpro2; |
| 3377 | register char *homedir; |
| 3378 | int count; |
| 3379 | |
| 3380 | if (NILP (dir)) |
| 3381 | dir = current_buffer->directory; |
| 3382 | if (NILP (defalt)) |
| 3383 | defalt = current_buffer->filename; |
| 3384 | |
| 3385 | /* If dir starts with user's homedir, change that to ~. */ |
| 3386 | homedir = (char *) egetenv ("HOME"); |
| 3387 | if (homedir != 0 |
| 3388 | && XTYPE (dir) == Lisp_String |
| 3389 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3390 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3391 | { |
| 3392 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3393 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3394 | XSTRING (dir)->data[0] = '~'; |
| 3395 | } |
| 3396 | |
| 3397 | if (insert_default_directory) |
| 3398 | { |
| 3399 | insdef = dir; |
| 3400 | insdef1 = dir; |
| 3401 | if (!NILP (initial)) |
| 3402 | { |
| 3403 | Lisp_Object args[2], pos; |
| 3404 | |
| 3405 | args[0] = insdef; |
| 3406 | args[1] = initial; |
| 3407 | insdef = Fconcat (2, args); |
| 3408 | pos = make_number (XSTRING (dir)->size); |
| 3409 | insdef1 = Fcons (insdef, pos); |
| 3410 | } |
| 3411 | } |
| 3412 | else |
| 3413 | insdef = Qnil, insdef1 = Qnil; |
| 3414 | |
| 3415 | #ifdef VMS |
| 3416 | count = specpdl_ptr - specpdl; |
| 3417 | specbind (intern ("completion-ignore-case"), Qt); |
| 3418 | #endif |
| 3419 | |
| 3420 | GCPRO2 (insdef, defalt); |
| 3421 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3422 | dir, mustmatch, insdef1, |
| 3423 | Qfile_name_history); |
| 3424 | |
| 3425 | #ifdef VMS |
| 3426 | unbind_to (count, Qnil); |
| 3427 | #endif |
| 3428 | |
| 3429 | UNGCPRO; |
| 3430 | if (NILP (val)) |
| 3431 | error ("No file name specified"); |
| 3432 | tem = Fstring_equal (val, insdef); |
| 3433 | if (!NILP (tem) && !NILP (defalt)) |
| 3434 | return defalt; |
| 3435 | if (XSTRING (val)->size == 0 && NILP (insdef)) |
| 3436 | { |
| 3437 | if (!NILP (defalt)) |
| 3438 | return defalt; |
| 3439 | else |
| 3440 | error ("No default file name"); |
| 3441 | } |
| 3442 | return Fsubstitute_in_file_name (val); |
| 3443 | } |
| 3444 | |
| 3445 | #if 0 /* Old version */ |
| 3446 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3447 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ |
| 3448 | Value is not expanded---you must call `expand-file-name' yourself.\n\ |
| 3449 | Default name to DEFAULT if user enters a null string.\n\ |
| 3450 | (If DEFAULT is omitted, the visited file name is used.)\n\ |
| 3451 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
| 3452 | Non-nil and non-t means also require confirmation after completion.\n\ |
| 3453 | Fifth arg INITIAL specifies text to start with.\n\ |
| 3454 | DIR defaults to current buffer's directory default.") |
| 3455 | (prompt, dir, defalt, mustmatch, initial) |
| 3456 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3457 | { |
| 3458 | Lisp_Object val, insdef, tem; |
| 3459 | struct gcpro gcpro1, gcpro2; |
| 3460 | register char *homedir; |
| 3461 | int count; |
| 3462 | |
| 3463 | if (NILP (dir)) |
| 3464 | dir = current_buffer->directory; |
| 3465 | if (NILP (defalt)) |
| 3466 | defalt = current_buffer->filename; |
| 3467 | |
| 3468 | /* If dir starts with user's homedir, change that to ~. */ |
| 3469 | homedir = (char *) egetenv ("HOME"); |
| 3470 | if (homedir != 0 |
| 3471 | && XTYPE (dir) == Lisp_String |
| 3472 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3473 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3474 | { |
| 3475 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3476 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3477 | XSTRING (dir)->data[0] = '~'; |
| 3478 | } |
| 3479 | |
| 3480 | if (!NILP (initial)) |
| 3481 | insdef = initial; |
| 3482 | else if (insert_default_directory) |
| 3483 | insdef = dir; |
| 3484 | else |
| 3485 | insdef = build_string (""); |
| 3486 | |
| 3487 | #ifdef VMS |
| 3488 | count = specpdl_ptr - specpdl; |
| 3489 | specbind (intern ("completion-ignore-case"), Qt); |
| 3490 | #endif |
| 3491 | |
| 3492 | GCPRO2 (insdef, defalt); |
| 3493 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3494 | dir, mustmatch, |
| 3495 | insert_default_directory ? insdef : Qnil, |
| 3496 | Qfile_name_history); |
| 3497 | |
| 3498 | #ifdef VMS |
| 3499 | unbind_to (count, Qnil); |
| 3500 | #endif |
| 3501 | |
| 3502 | UNGCPRO; |
| 3503 | if (NILP (val)) |
| 3504 | error ("No file name specified"); |
| 3505 | tem = Fstring_equal (val, insdef); |
| 3506 | if (!NILP (tem) && !NILP (defalt)) |
| 3507 | return defalt; |
| 3508 | return Fsubstitute_in_file_name (val); |
| 3509 | } |
| 3510 | #endif /* Old version */ |
| 3511 | \f |
| 3512 | syms_of_fileio () |
| 3513 | { |
| 3514 | Qexpand_file_name = intern ("expand-file-name"); |
| 3515 | Qdirectory_file_name = intern ("directory-file-name"); |
| 3516 | Qfile_name_directory = intern ("file-name-directory"); |
| 3517 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); |
| 3518 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
| 3519 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
| 3520 | Qcopy_file = intern ("copy-file"); |
| 3521 | Qmake_directory = intern ("make-directory"); |
| 3522 | Qdelete_directory = intern ("delete-directory"); |
| 3523 | Qdelete_file = intern ("delete-file"); |
| 3524 | Qrename_file = intern ("rename-file"); |
| 3525 | Qadd_name_to_file = intern ("add-name-to-file"); |
| 3526 | Qmake_symbolic_link = intern ("make-symbolic-link"); |
| 3527 | Qfile_exists_p = intern ("file-exists-p"); |
| 3528 | Qfile_executable_p = intern ("file-executable-p"); |
| 3529 | Qfile_readable_p = intern ("file-readable-p"); |
| 3530 | Qfile_symlink_p = intern ("file-symlink-p"); |
| 3531 | Qfile_writable_p = intern ("file-writable-p"); |
| 3532 | Qfile_directory_p = intern ("file-directory-p"); |
| 3533 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
| 3534 | Qfile_modes = intern ("file-modes"); |
| 3535 | Qset_file_modes = intern ("set-file-modes"); |
| 3536 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); |
| 3537 | Qinsert_file_contents = intern ("insert-file-contents"); |
| 3538 | Qwrite_region = intern ("write-region"); |
| 3539 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); |
| 3540 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
| 3541 | |
| 3542 | staticpro (&Qexpand_file_name); |
| 3543 | staticpro (&Qdirectory_file_name); |
| 3544 | staticpro (&Qfile_name_directory); |
| 3545 | staticpro (&Qfile_name_nondirectory); |
| 3546 | staticpro (&Qunhandled_file_name_directory); |
| 3547 | staticpro (&Qfile_name_as_directory); |
| 3548 | staticpro (&Qcopy_file); |
| 3549 | staticpro (&Qmake_directory); |
| 3550 | staticpro (&Qdelete_directory); |
| 3551 | staticpro (&Qdelete_file); |
| 3552 | staticpro (&Qrename_file); |
| 3553 | staticpro (&Qadd_name_to_file); |
| 3554 | staticpro (&Qmake_symbolic_link); |
| 3555 | staticpro (&Qfile_exists_p); |
| 3556 | staticpro (&Qfile_executable_p); |
| 3557 | staticpro (&Qfile_readable_p); |
| 3558 | staticpro (&Qfile_symlink_p); |
| 3559 | staticpro (&Qfile_writable_p); |
| 3560 | staticpro (&Qfile_directory_p); |
| 3561 | staticpro (&Qfile_accessible_directory_p); |
| 3562 | staticpro (&Qfile_modes); |
| 3563 | staticpro (&Qset_file_modes); |
| 3564 | staticpro (&Qfile_newer_than_file_p); |
| 3565 | staticpro (&Qinsert_file_contents); |
| 3566 | staticpro (&Qwrite_region); |
| 3567 | staticpro (&Qverify_visited_file_modtime); |
| 3568 | |
| 3569 | Qfile_name_history = intern ("file-name-history"); |
| 3570 | Fset (Qfile_name_history, Qnil); |
| 3571 | staticpro (&Qfile_name_history); |
| 3572 | |
| 3573 | Qfile_error = intern ("file-error"); |
| 3574 | staticpro (&Qfile_error); |
| 3575 | Qfile_already_exists = intern("file-already-exists"); |
| 3576 | staticpro (&Qfile_already_exists); |
| 3577 | |
| 3578 | Qcar_less_than_car = intern ("car-less-than-car"); |
| 3579 | staticpro (&Qcar_less_than_car); |
| 3580 | |
| 3581 | Fput (Qfile_error, Qerror_conditions, |
| 3582 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); |
| 3583 | Fput (Qfile_error, Qerror_message, |
| 3584 | build_string ("File error")); |
| 3585 | |
| 3586 | Fput (Qfile_already_exists, Qerror_conditions, |
| 3587 | Fcons (Qfile_already_exists, |
| 3588 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); |
| 3589 | Fput (Qfile_already_exists, Qerror_message, |
| 3590 | build_string ("File already exists")); |
| 3591 | |
| 3592 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, |
| 3593 | "*Non-nil means when reading a filename start with default dir in minibuffer."); |
| 3594 | insert_default_directory = 1; |
| 3595 | |
| 3596 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, |
| 3597 | "*Non-nil means write new files with record format `stmlf'.\n\ |
| 3598 | nil means use format `var'. This variable is meaningful only on VMS."); |
| 3599 | vms_stmlf_recfm = 0; |
| 3600 | |
| 3601 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
| 3602 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ |
| 3603 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ |
| 3604 | HANDLER.\n\ |
| 3605 | \n\ |
| 3606 | The first argument given to HANDLER is the name of the I/O primitive\n\ |
| 3607 | to be handled; the remaining arguments are the arguments that were\n\ |
| 3608 | passed to that primitive. For example, if you do\n\ |
| 3609 | (file-exists-p FILENAME)\n\ |
| 3610 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ |
| 3611 | (funcall HANDLER 'file-exists-p FILENAME)\n\ |
| 3612 | The function `find-file-name-handler' checks this list for a handler\n\ |
| 3613 | for its argument."); |
| 3614 | Vfile_name_handler_alist = Qnil; |
| 3615 | |
| 3616 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
| 3617 | "A list of functions to be called at the end of `insert-file-contents'.\n\ |
| 3618 | Each is passed one argument, the number of bytes inserted. It should return\n\ |
| 3619 | the new byte count, and leave point the same. If `insert-file-contents' is\n\ |
| 3620 | intercepted by a handler from `file-name-handler-alist', that handler is\n\ |
| 3621 | responsible for calling the after-insert-file-functions if appropriate."); |
| 3622 | Vafter_insert_file_functions = Qnil; |
| 3623 | |
| 3624 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, |
| 3625 | "A list of functions to be called at the start of `write-region'.\n\ |
| 3626 | Each is passed two arguments, START and END as for `write-region'. It should\n\ |
| 3627 | return a list of pairs (POSITION . STRING) of strings to be effectively\n\ |
| 3628 | inserted at the specified positions of the file being written (1 means to\n\ |
| 3629 | insert before the first byte written). The POSITIONs must be sorted into\n\ |
| 3630 | increasing order. If there are several functions in the list, the several\n\ |
| 3631 | lists are merged destructively."); |
| 3632 | Vwrite_region_annotate_functions = Qnil; |
| 3633 | |
| 3634 | defsubr (&Sfind_file_name_handler); |
| 3635 | defsubr (&Sfile_name_directory); |
| 3636 | defsubr (&Sfile_name_nondirectory); |
| 3637 | defsubr (&Sunhandled_file_name_directory); |
| 3638 | defsubr (&Sfile_name_as_directory); |
| 3639 | defsubr (&Sdirectory_file_name); |
| 3640 | defsubr (&Smake_temp_name); |
| 3641 | defsubr (&Sexpand_file_name); |
| 3642 | defsubr (&Ssubstitute_in_file_name); |
| 3643 | defsubr (&Scopy_file); |
| 3644 | defsubr (&Smake_directory_internal); |
| 3645 | defsubr (&Sdelete_directory); |
| 3646 | defsubr (&Sdelete_file); |
| 3647 | defsubr (&Srename_file); |
| 3648 | defsubr (&Sadd_name_to_file); |
| 3649 | #ifdef S_IFLNK |
| 3650 | defsubr (&Smake_symbolic_link); |
| 3651 | #endif /* S_IFLNK */ |
| 3652 | #ifdef VMS |
| 3653 | defsubr (&Sdefine_logical_name); |
| 3654 | #endif /* VMS */ |
| 3655 | #ifdef HPUX_NET |
| 3656 | defsubr (&Ssysnetunam); |
| 3657 | #endif /* HPUX_NET */ |
| 3658 | defsubr (&Sfile_name_absolute_p); |
| 3659 | defsubr (&Sfile_exists_p); |
| 3660 | defsubr (&Sfile_executable_p); |
| 3661 | defsubr (&Sfile_readable_p); |
| 3662 | defsubr (&Sfile_writable_p); |
| 3663 | defsubr (&Sfile_symlink_p); |
| 3664 | defsubr (&Sfile_directory_p); |
| 3665 | defsubr (&Sfile_accessible_directory_p); |
| 3666 | defsubr (&Sfile_modes); |
| 3667 | defsubr (&Sset_file_modes); |
| 3668 | defsubr (&Sset_default_file_modes); |
| 3669 | defsubr (&Sdefault_file_modes); |
| 3670 | defsubr (&Sfile_newer_than_file_p); |
| 3671 | defsubr (&Sinsert_file_contents); |
| 3672 | defsubr (&Swrite_region); |
| 3673 | defsubr (&Scar_less_than_car); |
| 3674 | defsubr (&Sverify_visited_file_modtime); |
| 3675 | defsubr (&Sclear_visited_file_modtime); |
| 3676 | defsubr (&Svisited_file_modtime); |
| 3677 | defsubr (&Sset_visited_file_modtime); |
| 3678 | defsubr (&Sdo_auto_save); |
| 3679 | defsubr (&Sset_buffer_auto_saved); |
| 3680 | defsubr (&Srecent_auto_save_p); |
| 3681 | |
| 3682 | defsubr (&Sread_file_name_internal); |
| 3683 | defsubr (&Sread_file_name); |
| 3684 | |
| 3685 | #ifdef unix |
| 3686 | defsubr (&Sunix_sync); |
| 3687 | #endif |
| 3688 | } |