| 1 | /* File IO for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1992, 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 | #ifdef VMS |
| 26 | #include "vms-pwd.h" |
| 27 | #else |
| 28 | #include <pwd.h> |
| 29 | #endif |
| 30 | |
| 31 | #include <ctype.h> |
| 32 | |
| 33 | #ifdef VMS |
| 34 | #include "dir.h" |
| 35 | #include <perror.h> |
| 36 | #include <stddef.h> |
| 37 | #include <string.h> |
| 38 | #endif |
| 39 | |
| 40 | #include <errno.h> |
| 41 | |
| 42 | #ifndef vax11c |
| 43 | extern int errno; |
| 44 | extern char *sys_errlist[]; |
| 45 | extern int sys_nerr; |
| 46 | #endif |
| 47 | |
| 48 | #define err_str(a) ((a) < sys_nerr ? sys_errlist[a] : "unknown error") |
| 49 | |
| 50 | #ifdef APOLLO |
| 51 | #include <sys/time.h> |
| 52 | #endif |
| 53 | |
| 54 | #ifndef USG |
| 55 | #ifndef VMS |
| 56 | #ifndef BSD4_1 |
| 57 | #define HAVE_FSYNC |
| 58 | #endif |
| 59 | #endif |
| 60 | #endif |
| 61 | |
| 62 | #include "lisp.h" |
| 63 | #include "intervals.h" |
| 64 | #include "buffer.h" |
| 65 | #include "window.h" |
| 66 | |
| 67 | #ifdef VMS |
| 68 | #include <file.h> |
| 69 | #include <rmsdef.h> |
| 70 | #include <fab.h> |
| 71 | #include <nam.h> |
| 72 | #endif |
| 73 | |
| 74 | #include "systime.h" |
| 75 | |
| 76 | #ifdef HPUX |
| 77 | #include <netio.h> |
| 78 | #ifndef HPUX8 |
| 79 | #include <errnet.h> |
| 80 | #endif |
| 81 | #endif |
| 82 | |
| 83 | #ifndef O_WRONLY |
| 84 | #define O_WRONLY 1 |
| 85 | #endif |
| 86 | |
| 87 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 88 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 89 | |
| 90 | /* Nonzero during writing of auto-save files */ |
| 91 | int auto_saving; |
| 92 | |
| 93 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
| 94 | a new file with the same mode as the original */ |
| 95 | int auto_save_mode_bits; |
| 96 | |
| 97 | /* Alist of elements (REGEXP . HANDLER) for file names |
| 98 | whose I/O is done with a special handler. */ |
| 99 | Lisp_Object Vfile_name_handler_alist; |
| 100 | |
| 101 | /* Nonzero means, when reading a filename in the minibuffer, |
| 102 | start out by inserting the default directory into the minibuffer. */ |
| 103 | int insert_default_directory; |
| 104 | |
| 105 | /* On VMS, nonzero means write new files with record format stmlf. |
| 106 | Zero means use var format. */ |
| 107 | int vms_stmlf_recfm; |
| 108 | |
| 109 | Lisp_Object Qfile_error, Qfile_already_exists; |
| 110 | |
| 111 | Lisp_Object Qfile_name_history; |
| 112 | |
| 113 | report_file_error (string, data) |
| 114 | char *string; |
| 115 | Lisp_Object data; |
| 116 | { |
| 117 | Lisp_Object errstring; |
| 118 | |
| 119 | if (errno >= 0 && errno < sys_nerr) |
| 120 | errstring = build_string (sys_errlist[errno]); |
| 121 | else |
| 122 | errstring = build_string ("undocumented error code"); |
| 123 | |
| 124 | /* System error messages are capitalized. Downcase the initial |
| 125 | unless it is followed by a slash. */ |
| 126 | if (XSTRING (errstring)->data[1] != '/') |
| 127 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); |
| 128 | |
| 129 | while (1) |
| 130 | Fsignal (Qfile_error, |
| 131 | Fcons (build_string (string), Fcons (errstring, data))); |
| 132 | } |
| 133 | |
| 134 | close_file_unwind (fd) |
| 135 | Lisp_Object fd; |
| 136 | { |
| 137 | close (XFASTINT (fd)); |
| 138 | } |
| 139 | \f |
| 140 | Lisp_Object Qexpand_file_name; |
| 141 | Lisp_Object Qdirectory_file_name; |
| 142 | Lisp_Object Qfile_name_directory; |
| 143 | Lisp_Object Qfile_name_nondirectory; |
| 144 | Lisp_Object Qunhandled_file_name_directory; |
| 145 | Lisp_Object Qfile_name_as_directory; |
| 146 | Lisp_Object Qcopy_file; |
| 147 | Lisp_Object Qmake_directory; |
| 148 | Lisp_Object Qdelete_directory; |
| 149 | Lisp_Object Qdelete_file; |
| 150 | Lisp_Object Qrename_file; |
| 151 | Lisp_Object Qadd_name_to_file; |
| 152 | Lisp_Object Qmake_symbolic_link; |
| 153 | Lisp_Object Qfile_exists_p; |
| 154 | Lisp_Object Qfile_executable_p; |
| 155 | Lisp_Object Qfile_readable_p; |
| 156 | Lisp_Object Qfile_symlink_p; |
| 157 | Lisp_Object Qfile_writable_p; |
| 158 | Lisp_Object Qfile_directory_p; |
| 159 | Lisp_Object Qfile_accessible_directory_p; |
| 160 | Lisp_Object Qfile_modes; |
| 161 | Lisp_Object Qset_file_modes; |
| 162 | Lisp_Object Qfile_newer_than_file_p; |
| 163 | Lisp_Object Qinsert_file_contents; |
| 164 | Lisp_Object Qwrite_region; |
| 165 | Lisp_Object Qverify_visited_file_modtime; |
| 166 | |
| 167 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 1, 1, 0, |
| 168 | "Return FILENAME's handler function, if its syntax is handled specially.\n\ |
| 169 | Otherwise, return nil.\n\ |
| 170 | A file name is handled if one of the regular expressions in\n\ |
| 171 | `file-name-handler-alist' matches it.") |
| 172 | (filename) |
| 173 | Lisp_Object filename; |
| 174 | { |
| 175 | /* This function must not munge the match data. */ |
| 176 | |
| 177 | Lisp_Object chain; |
| 178 | for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons; |
| 179 | chain = XCONS (chain)->cdr) |
| 180 | { |
| 181 | Lisp_Object elt; |
| 182 | elt = XCONS (chain)->car; |
| 183 | if (XTYPE (elt) == Lisp_Cons) |
| 184 | { |
| 185 | Lisp_Object string; |
| 186 | string = XCONS (elt)->car; |
| 187 | if (XTYPE (string) == Lisp_String |
| 188 | && fast_string_match (string, filename) >= 0) |
| 189 | return XCONS (elt)->cdr; |
| 190 | } |
| 191 | |
| 192 | QUIT; |
| 193 | } |
| 194 | return Qnil; |
| 195 | } |
| 196 | \f |
| 197 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
| 198 | 1, 1, 0, |
| 199 | "Return the directory component in file name NAME.\n\ |
| 200 | Return nil if NAME does not include a directory.\n\ |
| 201 | Otherwise return a directory spec.\n\ |
| 202 | Given a Unix syntax file name, returns a string ending in slash;\n\ |
| 203 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") |
| 204 | (file) |
| 205 | Lisp_Object file; |
| 206 | { |
| 207 | register unsigned char *beg; |
| 208 | register unsigned char *p; |
| 209 | Lisp_Object handler; |
| 210 | |
| 211 | CHECK_STRING (file, 0); |
| 212 | |
| 213 | /* If the file name has special constructs in it, |
| 214 | call the corresponding file handler. */ |
| 215 | handler = Ffind_file_name_handler (file); |
| 216 | if (!NILP (handler)) |
| 217 | return call2 (handler, Qfile_name_directory, file); |
| 218 | |
| 219 | beg = XSTRING (file)->data; |
| 220 | p = beg + XSTRING (file)->size; |
| 221 | |
| 222 | while (p != beg && p[-1] != '/' |
| 223 | #ifdef VMS |
| 224 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 225 | #endif /* VMS */ |
| 226 | ) p--; |
| 227 | |
| 228 | if (p == beg) |
| 229 | return Qnil; |
| 230 | return make_string (beg, p - beg); |
| 231 | } |
| 232 | |
| 233 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, |
| 234 | 1, 1, 0, |
| 235 | "Return file name NAME sans its directory.\n\ |
| 236 | For example, in a Unix-syntax file name,\n\ |
| 237 | this is everything after the last slash,\n\ |
| 238 | or the entire name if it contains no slash.") |
| 239 | (file) |
| 240 | Lisp_Object file; |
| 241 | { |
| 242 | register unsigned char *beg, *p, *end; |
| 243 | Lisp_Object handler; |
| 244 | |
| 245 | CHECK_STRING (file, 0); |
| 246 | |
| 247 | /* If the file name has special constructs in it, |
| 248 | call the corresponding file handler. */ |
| 249 | handler = Ffind_file_name_handler (file); |
| 250 | if (!NILP (handler)) |
| 251 | return call2 (handler, Qfile_name_nondirectory, file); |
| 252 | |
| 253 | beg = XSTRING (file)->data; |
| 254 | end = p = beg + XSTRING (file)->size; |
| 255 | |
| 256 | while (p != beg && p[-1] != '/' |
| 257 | #ifdef VMS |
| 258 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 259 | #endif /* VMS */ |
| 260 | ) p--; |
| 261 | |
| 262 | return make_string (p, end - p); |
| 263 | } |
| 264 | |
| 265 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, Sunhandled_file_name_directory, 1, 1, 0, |
| 266 | "Return a directly usable directory name somehow associated with FILENAME.\n\ |
| 267 | A `directly usable' directory name is one that may be used without the\n\ |
| 268 | intervention of any file handler.\n\ |
| 269 | If FILENAME is a directly usable file itself, return\n\ |
| 270 | (file-name-directory FILENAME).\n\ |
| 271 | The `call-process' and `start-process' functions use this function to\n\ |
| 272 | get a current directory to run processes in.") |
| 273 | (filename) |
| 274 | Lisp_Object filename; |
| 275 | { |
| 276 | Lisp_Object handler; |
| 277 | |
| 278 | /* If the file name has special constructs in it, |
| 279 | call the corresponding file handler. */ |
| 280 | handler = Ffind_file_name_handler (filename); |
| 281 | if (!NILP (handler)) |
| 282 | return call2 (handler, Qunhandled_file_name_directory, filename); |
| 283 | |
| 284 | return Ffile_name_directory (filename); |
| 285 | } |
| 286 | |
| 287 | \f |
| 288 | char * |
| 289 | file_name_as_directory (out, in) |
| 290 | char *out, *in; |
| 291 | { |
| 292 | int size = strlen (in) - 1; |
| 293 | |
| 294 | strcpy (out, in); |
| 295 | |
| 296 | #ifdef VMS |
| 297 | /* Is it already a directory string? */ |
| 298 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') |
| 299 | return out; |
| 300 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ |
| 301 | else if (! index (in, '/') |
| 302 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) |
| 303 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) |
| 304 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) |
| 305 | || ! strncmp (&in[size - 5], ".dir", 4)) |
| 306 | && (in[size - 1] == '.' || in[size - 1] == ';') |
| 307 | && in[size] == '1'))) |
| 308 | { |
| 309 | register char *p, *dot; |
| 310 | char brack; |
| 311 | |
| 312 | /* x.dir -> [.x] |
| 313 | dir:x.dir --> dir:[x] |
| 314 | dir:[x]y.dir --> dir:[x.y] */ |
| 315 | p = in + size; |
| 316 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; |
| 317 | if (p != in) |
| 318 | { |
| 319 | strncpy (out, in, p - in); |
| 320 | out[p - in] = '\0'; |
| 321 | if (*p == ':') |
| 322 | { |
| 323 | brack = ']'; |
| 324 | strcat (out, ":["); |
| 325 | } |
| 326 | else |
| 327 | { |
| 328 | brack = *p; |
| 329 | strcat (out, "."); |
| 330 | } |
| 331 | p++; |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | brack = ']'; |
| 336 | strcpy (out, "[."); |
| 337 | } |
| 338 | dot = index (p, '.'); |
| 339 | if (dot) |
| 340 | { |
| 341 | /* blindly remove any extension */ |
| 342 | size = strlen (out) + (dot - p); |
| 343 | strncat (out, p, dot - p); |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | strcat (out, p); |
| 348 | size = strlen (out); |
| 349 | } |
| 350 | out[size++] = brack; |
| 351 | out[size] = '\0'; |
| 352 | } |
| 353 | #else /* not VMS */ |
| 354 | /* For Unix syntax, Append a slash if necessary */ |
| 355 | if (out[size] != '/') |
| 356 | strcat (out, "/"); |
| 357 | #endif /* not VMS */ |
| 358 | return out; |
| 359 | } |
| 360 | |
| 361 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
| 362 | Sfile_name_as_directory, 1, 1, 0, |
| 363 | "Return a string representing file FILENAME interpreted as a directory.\n\ |
| 364 | This operation exists because a directory is also a file, but its name as\n\ |
| 365 | a directory is different from its name as a file.\n\ |
| 366 | The result can be used as the value of `default-directory'\n\ |
| 367 | or passed as second argument to `expand-file-name'.\n\ |
| 368 | For a Unix-syntax file name, just appends a slash.\n\ |
| 369 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") |
| 370 | (file) |
| 371 | Lisp_Object file; |
| 372 | { |
| 373 | char *buf; |
| 374 | Lisp_Object handler; |
| 375 | |
| 376 | CHECK_STRING (file, 0); |
| 377 | if (NILP (file)) |
| 378 | return Qnil; |
| 379 | |
| 380 | /* If the file name has special constructs in it, |
| 381 | call the corresponding file handler. */ |
| 382 | handler = Ffind_file_name_handler (file); |
| 383 | if (!NILP (handler)) |
| 384 | return call2 (handler, Qfile_name_as_directory, file); |
| 385 | |
| 386 | buf = (char *) alloca (XSTRING (file)->size + 10); |
| 387 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); |
| 388 | } |
| 389 | \f |
| 390 | /* |
| 391 | * Convert from directory name to filename. |
| 392 | * On VMS: |
| 393 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 |
| 394 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 |
| 395 | * On UNIX, it's simple: just make sure there is a terminating / |
| 396 | |
| 397 | * Value is nonzero if the string output is different from the input. |
| 398 | */ |
| 399 | |
| 400 | directory_file_name (src, dst) |
| 401 | char *src, *dst; |
| 402 | { |
| 403 | long slen; |
| 404 | #ifdef VMS |
| 405 | long rlen; |
| 406 | char * ptr, * rptr; |
| 407 | char bracket; |
| 408 | struct FAB fab = cc$rms_fab; |
| 409 | struct NAM nam = cc$rms_nam; |
| 410 | char esa[NAM$C_MAXRSS]; |
| 411 | #endif /* VMS */ |
| 412 | |
| 413 | slen = strlen (src); |
| 414 | #ifdef VMS |
| 415 | if (! index (src, '/') |
| 416 | && (src[slen - 1] == ']' |
| 417 | || src[slen - 1] == ':' |
| 418 | || src[slen - 1] == '>')) |
| 419 | { |
| 420 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ |
| 421 | fab.fab$l_fna = src; |
| 422 | fab.fab$b_fns = slen; |
| 423 | fab.fab$l_nam = &nam; |
| 424 | fab.fab$l_fop = FAB$M_NAM; |
| 425 | |
| 426 | nam.nam$l_esa = esa; |
| 427 | nam.nam$b_ess = sizeof esa; |
| 428 | nam.nam$b_nop |= NAM$M_SYNCHK; |
| 429 | |
| 430 | /* We call SYS$PARSE to handle such things as [--] for us. */ |
| 431 | if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL) |
| 432 | { |
| 433 | slen = nam.nam$b_esl; |
| 434 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') |
| 435 | slen -= 2; |
| 436 | esa[slen] = '\0'; |
| 437 | src = esa; |
| 438 | } |
| 439 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 440 | { |
| 441 | /* what about when we have logical_name:???? */ |
| 442 | if (src[slen - 1] == ':') |
| 443 | { /* Xlate logical name and see what we get */ |
| 444 | ptr = strcpy (dst, src); /* upper case for getenv */ |
| 445 | while (*ptr) |
| 446 | { |
| 447 | if ('a' <= *ptr && *ptr <= 'z') |
| 448 | *ptr -= 040; |
| 449 | ptr++; |
| 450 | } |
| 451 | dst[slen - 1] = 0; /* remove colon */ |
| 452 | if (!(src = egetenv (dst))) |
| 453 | return 0; |
| 454 | /* should we jump to the beginning of this procedure? |
| 455 | Good points: allows us to use logical names that xlate |
| 456 | to Unix names, |
| 457 | Bad points: can be a problem if we just translated to a device |
| 458 | name... |
| 459 | For now, I'll punt and always expect VMS names, and hope for |
| 460 | the best! */ |
| 461 | slen = strlen (src); |
| 462 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 463 | { /* no recursion here! */ |
| 464 | strcpy (dst, src); |
| 465 | return 0; |
| 466 | } |
| 467 | } |
| 468 | else |
| 469 | { /* not a directory spec */ |
| 470 | strcpy (dst, src); |
| 471 | return 0; |
| 472 | } |
| 473 | } |
| 474 | bracket = src[slen - 1]; |
| 475 | |
| 476 | /* If bracket is ']' or '>', bracket - 2 is the corresponding |
| 477 | opening bracket. */ |
| 478 | ptr = index (src, bracket - 2); |
| 479 | if (ptr == 0) |
| 480 | { /* no opening bracket */ |
| 481 | strcpy (dst, src); |
| 482 | return 0; |
| 483 | } |
| 484 | if (!(rptr = rindex (src, '.'))) |
| 485 | rptr = ptr; |
| 486 | slen = rptr - src; |
| 487 | strncpy (dst, src, slen); |
| 488 | dst[slen] = '\0'; |
| 489 | if (*rptr == '.') |
| 490 | { |
| 491 | dst[slen++] = bracket; |
| 492 | dst[slen] = '\0'; |
| 493 | } |
| 494 | else |
| 495 | { |
| 496 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), |
| 497 | then translate the device and recurse. */ |
| 498 | if (dst[slen - 1] == ':' |
| 499 | && dst[slen - 2] != ':' /* skip decnet nodes */ |
| 500 | && strcmp(src + slen, "[000000]") == 0) |
| 501 | { |
| 502 | dst[slen - 1] = '\0'; |
| 503 | if ((ptr = egetenv (dst)) |
| 504 | && (rlen = strlen (ptr) - 1) > 0 |
| 505 | && (ptr[rlen] == ']' || ptr[rlen] == '>') |
| 506 | && ptr[rlen - 1] == '.') |
| 507 | { |
| 508 | char * buf = (char *) alloca (strlen (ptr) + 1); |
| 509 | strcpy (buf, ptr); |
| 510 | buf[rlen - 1] = ']'; |
| 511 | buf[rlen] = '\0'; |
| 512 | return directory_file_name (buf, dst); |
| 513 | } |
| 514 | else |
| 515 | dst[slen - 1] = ':'; |
| 516 | } |
| 517 | strcat (dst, "[000000]"); |
| 518 | slen += 8; |
| 519 | } |
| 520 | rptr++; |
| 521 | rlen = strlen (rptr) - 1; |
| 522 | strncat (dst, rptr, rlen); |
| 523 | dst[slen + rlen] = '\0'; |
| 524 | strcat (dst, ".DIR.1"); |
| 525 | return 1; |
| 526 | } |
| 527 | #endif /* VMS */ |
| 528 | /* Process as Unix format: just remove any final slash. |
| 529 | But leave "/" unchanged; do not change it to "". */ |
| 530 | strcpy (dst, src); |
| 531 | if (slen > 1 && dst[slen - 1] == '/') |
| 532 | dst[slen - 1] = 0; |
| 533 | return 1; |
| 534 | } |
| 535 | |
| 536 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
| 537 | 1, 1, 0, |
| 538 | "Returns the file name of the directory named DIR.\n\ |
| 539 | This is the name of the file that holds the data for the directory DIR.\n\ |
| 540 | This operation exists because a directory is also a file, but its name as\n\ |
| 541 | a directory is different from its name as a file.\n\ |
| 542 | In Unix-syntax, this function just removes the final slash.\n\ |
| 543 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ |
| 544 | it returns a file name such as \"[X]Y.DIR.1\".") |
| 545 | (directory) |
| 546 | Lisp_Object directory; |
| 547 | { |
| 548 | char *buf; |
| 549 | Lisp_Object handler; |
| 550 | |
| 551 | CHECK_STRING (directory, 0); |
| 552 | |
| 553 | if (NILP (directory)) |
| 554 | return Qnil; |
| 555 | |
| 556 | /* If the file name has special constructs in it, |
| 557 | call the corresponding file handler. */ |
| 558 | handler = Ffind_file_name_handler (directory); |
| 559 | if (!NILP (handler)) |
| 560 | return call2 (handler, Qdirectory_file_name, directory); |
| 561 | |
| 562 | #ifdef VMS |
| 563 | /* 20 extra chars is insufficient for VMS, since we might perform a |
| 564 | logical name translation. an equivalence string can be up to 255 |
| 565 | chars long, so grab that much extra space... - sss */ |
| 566 | buf = (char *) alloca (XSTRING (directory)->size + 20 + 255); |
| 567 | #else |
| 568 | buf = (char *) alloca (XSTRING (directory)->size + 20); |
| 569 | #endif |
| 570 | directory_file_name (XSTRING (directory)->data, buf); |
| 571 | return build_string (buf); |
| 572 | } |
| 573 | |
| 574 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, |
| 575 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ |
| 576 | The Emacs process number forms part of the result,\n\ |
| 577 | so there is no danger of generating a name being used by another process.") |
| 578 | (prefix) |
| 579 | Lisp_Object prefix; |
| 580 | { |
| 581 | Lisp_Object val; |
| 582 | val = concat2 (prefix, build_string ("XXXXXX")); |
| 583 | mktemp (XSTRING (val)->data); |
| 584 | return val; |
| 585 | } |
| 586 | \f |
| 587 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 588 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 589 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 590 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 591 | the current buffer's value of default-directory is used.\n\ |
| 592 | Path components that are `.' are removed, and \n\ |
| 593 | path components followed by `..' are removed, along with the `..' itself;\n\ |
| 594 | note that these simplifications are done without checking the resulting\n\ |
| 595 | paths in the file system.\n\ |
| 596 | An initial `~/' expands to your home directory.\n\ |
| 597 | An initial `~USER/' expands to USER's home directory.\n\ |
| 598 | See also the function `substitute-in-file-name'.") |
| 599 | (name, defalt) |
| 600 | Lisp_Object name, defalt; |
| 601 | { |
| 602 | unsigned char *nm; |
| 603 | |
| 604 | register unsigned char *newdir, *p, *o; |
| 605 | int tlen; |
| 606 | unsigned char *target; |
| 607 | struct passwd *pw; |
| 608 | #ifdef VMS |
| 609 | unsigned char * colon = 0; |
| 610 | unsigned char * close = 0; |
| 611 | unsigned char * slash = 0; |
| 612 | unsigned char * brack = 0; |
| 613 | int lbrack = 0, rbrack = 0; |
| 614 | int dots = 0; |
| 615 | #endif /* VMS */ |
| 616 | Lisp_Object handler; |
| 617 | |
| 618 | CHECK_STRING (name, 0); |
| 619 | |
| 620 | /* If the file name has special constructs in it, |
| 621 | call the corresponding file handler. */ |
| 622 | handler = Ffind_file_name_handler (name); |
| 623 | if (!NILP (handler)) |
| 624 | return call3 (handler, Qexpand_file_name, name, defalt); |
| 625 | |
| 626 | /* Use the buffer's default-directory if DEFALT is omitted. */ |
| 627 | if (NILP (defalt)) |
| 628 | defalt = current_buffer->directory; |
| 629 | CHECK_STRING (defalt, 1); |
| 630 | |
| 631 | /* Make sure DEFALT is properly expanded. |
| 632 | It would be better to do this down below where we actually use |
| 633 | defalt. Unfortunately, calling Fexpand_file_name recursively |
| 634 | could invoke GC, and the strings might be relocated. This would |
| 635 | be annoying because we have pointers into strings lying around |
| 636 | that would need adjusting, and people would add new pointers to |
| 637 | the code and forget to adjust them, resulting in intermittent bugs. |
| 638 | Putting this call here avoids all that crud. |
| 639 | |
| 640 | The EQ test avoids infinite recursion. */ |
| 641 | if (! NILP (defalt) && !EQ (defalt, name) |
| 642 | /* This saves time in a common case. */ |
| 643 | && XSTRING (defalt)->data[0] != '/') |
| 644 | { |
| 645 | struct gcpro gcpro1; |
| 646 | |
| 647 | GCPRO1 (name); |
| 648 | defalt = Fexpand_file_name (defalt, Qnil); |
| 649 | UNGCPRO; |
| 650 | } |
| 651 | |
| 652 | #ifdef VMS |
| 653 | /* Filenames on VMS are always upper case. */ |
| 654 | name = Fupcase (name); |
| 655 | #endif |
| 656 | |
| 657 | nm = XSTRING (name)->data; |
| 658 | |
| 659 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 660 | If no /./ or /../ we can return right away. */ |
| 661 | if ( |
| 662 | nm[0] == '/' |
| 663 | #ifdef VMS |
| 664 | || index (nm, ':') |
| 665 | #endif /* VMS */ |
| 666 | ) |
| 667 | { |
| 668 | /* If it turns out that the filename we want to return is just a |
| 669 | suffix of FILENAME, we don't need to go through and edit |
| 670 | things; we just need to construct a new string using data |
| 671 | starting at the middle of FILENAME. If we set lose to a |
| 672 | non-zero value, that means we've discovered that we can't do |
| 673 | that cool trick. */ |
| 674 | int lose = 0; |
| 675 | |
| 676 | p = nm; |
| 677 | while (*p) |
| 678 | { |
| 679 | /* Since we know the path is absolute, we can assume that each |
| 680 | element starts with a "/". */ |
| 681 | |
| 682 | /* "//" anywhere isn't necessarily hairy; we just start afresh |
| 683 | with the second slash. */ |
| 684 | if (p[0] == '/' && p[1] == '/' |
| 685 | #ifdef APOLLO |
| 686 | /* // at start of filename is meaningful on Apollo system */ |
| 687 | && nm != p |
| 688 | #endif /* APOLLO */ |
| 689 | ) |
| 690 | nm = p + 1; |
| 691 | |
| 692 | /* "~" is hairy as the start of any path element. */ |
| 693 | if (p[0] == '/' && p[1] == '~') |
| 694 | nm = p + 1, lose = 1; |
| 695 | |
| 696 | /* "." and ".." are hairy. */ |
| 697 | if (p[0] == '/' |
| 698 | && p[1] == '.' |
| 699 | && (p[2] == '/' |
| 700 | || p[2] == 0 |
| 701 | || (p[2] == '.' && (p[3] == '/' |
| 702 | || p[3] == 0)))) |
| 703 | lose = 1; |
| 704 | #ifdef VMS |
| 705 | if (p[0] == '\\') |
| 706 | lose = 1; |
| 707 | if (p[0] == '/') { |
| 708 | /* if dev:[dir]/, move nm to / */ |
| 709 | if (!slash && p > nm && (brack || colon)) { |
| 710 | nm = (brack ? brack + 1 : colon + 1); |
| 711 | lbrack = rbrack = 0; |
| 712 | brack = 0; |
| 713 | colon = 0; |
| 714 | } |
| 715 | slash = p; |
| 716 | } |
| 717 | if (p[0] == '-') |
| 718 | #ifndef VMS4_4 |
| 719 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 720 | if (lbrack == rbrack) |
| 721 | { |
| 722 | if (dots < 2) /* this is to allow negative version numbers */ |
| 723 | p[0] = '_'; |
| 724 | } |
| 725 | else |
| 726 | #endif /* VMS4_4 */ |
| 727 | if (lbrack > rbrack && |
| 728 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 729 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 730 | lose = 1; |
| 731 | #ifndef VMS4_4 |
| 732 | else |
| 733 | p[0] = '_'; |
| 734 | #endif /* VMS4_4 */ |
| 735 | /* count open brackets, reset close bracket pointer */ |
| 736 | if (p[0] == '[' || p[0] == '<') |
| 737 | lbrack++, brack = 0; |
| 738 | /* count close brackets, set close bracket pointer */ |
| 739 | if (p[0] == ']' || p[0] == '>') |
| 740 | rbrack++, brack = p; |
| 741 | /* detect ][ or >< */ |
| 742 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 743 | lose = 1; |
| 744 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 745 | nm = p + 1, lose = 1; |
| 746 | if (p[0] == ':' && (colon || slash)) |
| 747 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 748 | if (brack) |
| 749 | { |
| 750 | nm = brack + 1; |
| 751 | brack = 0; |
| 752 | } |
| 753 | /* if /pathname/dev:, move nm to dev: */ |
| 754 | else if (slash) |
| 755 | nm = slash + 1; |
| 756 | /* if node::dev:, move colon following dev */ |
| 757 | else if (colon && colon[-1] == ':') |
| 758 | colon = p; |
| 759 | /* if dev1:dev2:, move nm to dev2: */ |
| 760 | else if (colon && colon[-1] != ':') |
| 761 | { |
| 762 | nm = colon + 1; |
| 763 | colon = 0; |
| 764 | } |
| 765 | if (p[0] == ':' && !colon) |
| 766 | { |
| 767 | if (p[1] == ':') |
| 768 | p++; |
| 769 | colon = p; |
| 770 | } |
| 771 | if (lbrack == rbrack) |
| 772 | if (p[0] == ';') |
| 773 | dots = 2; |
| 774 | else if (p[0] == '.') |
| 775 | dots++; |
| 776 | #endif /* VMS */ |
| 777 | p++; |
| 778 | } |
| 779 | if (!lose) |
| 780 | { |
| 781 | #ifdef VMS |
| 782 | if (index (nm, '/')) |
| 783 | return build_string (sys_translate_unix (nm)); |
| 784 | #endif /* VMS */ |
| 785 | if (nm == XSTRING (name)->data) |
| 786 | return name; |
| 787 | return build_string (nm); |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | /* Now determine directory to start with and put it in newdir */ |
| 792 | |
| 793 | newdir = 0; |
| 794 | |
| 795 | if (nm[0] == '~') /* prefix ~ */ |
| 796 | { |
| 797 | if (nm[1] == '/' |
| 798 | #ifdef VMS |
| 799 | || nm[1] == ':' |
| 800 | #endif /* VMS */ |
| 801 | || nm[1] == 0) /* ~ by itself */ |
| 802 | { |
| 803 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 804 | newdir = (unsigned char *) ""; |
| 805 | nm++; |
| 806 | #ifdef VMS |
| 807 | nm++; /* Don't leave the slash in nm. */ |
| 808 | #endif /* VMS */ |
| 809 | } |
| 810 | else /* ~user/filename */ |
| 811 | { |
| 812 | for (p = nm; *p && (*p != '/' |
| 813 | #ifdef VMS |
| 814 | && *p != ':' |
| 815 | #endif /* VMS */ |
| 816 | ); p++); |
| 817 | o = (unsigned char *) alloca (p - nm + 1); |
| 818 | bcopy ((char *) nm, o, p - nm); |
| 819 | o [p - nm] = 0; |
| 820 | |
| 821 | pw = (struct passwd *) getpwnam (o + 1); |
| 822 | if (pw) |
| 823 | { |
| 824 | newdir = (unsigned char *) pw -> pw_dir; |
| 825 | #ifdef VMS |
| 826 | nm = p + 1; /* skip the terminator */ |
| 827 | #else |
| 828 | nm = p; |
| 829 | #endif /* VMS */ |
| 830 | } |
| 831 | |
| 832 | /* If we don't find a user of that name, leave the name |
| 833 | unchanged; don't move nm forward to p. */ |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | if (nm[0] != '/' |
| 838 | #ifdef VMS |
| 839 | && !index (nm, ':') |
| 840 | #endif /* not VMS */ |
| 841 | && !newdir) |
| 842 | { |
| 843 | newdir = XSTRING (defalt)->data; |
| 844 | } |
| 845 | |
| 846 | if (newdir != 0) |
| 847 | { |
| 848 | /* Get rid of any slash at the end of newdir. */ |
| 849 | int length = strlen (newdir); |
| 850 | /* Adding `length > 1 &&' makes ~ expand into / when homedir |
| 851 | is the root dir. People disagree about whether that is right. |
| 852 | Anyway, we can't take the risk of this change now. */ |
| 853 | if (newdir[length - 1] == '/') |
| 854 | { |
| 855 | unsigned char *temp = (unsigned char *) alloca (length); |
| 856 | bcopy (newdir, temp, length - 1); |
| 857 | temp[length - 1] = 0; |
| 858 | newdir = temp; |
| 859 | } |
| 860 | tlen = length + 1; |
| 861 | } |
| 862 | else |
| 863 | tlen = 0; |
| 864 | |
| 865 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 866 | tlen += strlen (nm) + 1; |
| 867 | target = (unsigned char *) alloca (tlen); |
| 868 | *target = 0; |
| 869 | |
| 870 | if (newdir) |
| 871 | { |
| 872 | #ifndef VMS |
| 873 | if (nm[0] == 0 || nm[0] == '/') |
| 874 | strcpy (target, newdir); |
| 875 | else |
| 876 | #endif |
| 877 | file_name_as_directory (target, newdir); |
| 878 | } |
| 879 | |
| 880 | strcat (target, nm); |
| 881 | #ifdef VMS |
| 882 | if (index (target, '/')) |
| 883 | strcpy (target, sys_translate_unix (target)); |
| 884 | #endif /* VMS */ |
| 885 | |
| 886 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
| 887 | |
| 888 | p = target; |
| 889 | o = target; |
| 890 | |
| 891 | while (*p) |
| 892 | { |
| 893 | #ifdef VMS |
| 894 | if (*p != ']' && *p != '>' && *p != '-') |
| 895 | { |
| 896 | if (*p == '\\') |
| 897 | p++; |
| 898 | *o++ = *p++; |
| 899 | } |
| 900 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 901 | /* brackets are offset from each other by 2 */ |
| 902 | { |
| 903 | p += 2; |
| 904 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 905 | /* convert [foo][bar] to [bar] */ |
| 906 | while (o[-1] != '[' && o[-1] != '<') |
| 907 | o--; |
| 908 | else if (*p == '-' && *o != '.') |
| 909 | *--p = '.'; |
| 910 | } |
| 911 | else if (p[0] == '-' && o[-1] == '.' && |
| 912 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 913 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 914 | { |
| 915 | do |
| 916 | o--; |
| 917 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 918 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 919 | p += 2; |
| 920 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 921 | p++, o--; |
| 922 | /* else [foo.-] ==> [-] */ |
| 923 | } |
| 924 | else |
| 925 | { |
| 926 | #ifndef VMS4_4 |
| 927 | if (*p == '-' && |
| 928 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 929 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 930 | *p = '_'; |
| 931 | #endif /* VMS4_4 */ |
| 932 | *o++ = *p++; |
| 933 | } |
| 934 | #else /* not VMS */ |
| 935 | if (*p != '/') |
| 936 | { |
| 937 | *o++ = *p++; |
| 938 | } |
| 939 | else if (!strncmp (p, "//", 2) |
| 940 | #ifdef APOLLO |
| 941 | /* // at start of filename is meaningful in Apollo system */ |
| 942 | && o != target |
| 943 | #endif /* APOLLO */ |
| 944 | ) |
| 945 | { |
| 946 | o = target; |
| 947 | p++; |
| 948 | } |
| 949 | else if (p[0] == '/' |
| 950 | && p[1] == '.' |
| 951 | && (p[2] == '/' |
| 952 | || p[2] == 0)) |
| 953 | { |
| 954 | /* If "/." is the entire filename, keep the "/". Otherwise, |
| 955 | just delete the whole "/.". */ |
| 956 | if (o == target && p[2] == '\0') |
| 957 | *o++ = *p; |
| 958 | p += 2; |
| 959 | } |
| 960 | else if (!strncmp (p, "/..", 3) |
| 961 | /* `/../' is the "superroot" on certain file systems. */ |
| 962 | && o != target |
| 963 | && (p[3] == '/' || p[3] == 0)) |
| 964 | { |
| 965 | while (o != target && *--o != '/') |
| 966 | ; |
| 967 | #ifdef APOLLO |
| 968 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 969 | ++o; |
| 970 | else |
| 971 | #endif /* APOLLO */ |
| 972 | if (o == target && *o == '/') |
| 973 | ++o; |
| 974 | p += 3; |
| 975 | } |
| 976 | else |
| 977 | { |
| 978 | *o++ = *p++; |
| 979 | } |
| 980 | #endif /* not VMS */ |
| 981 | } |
| 982 | |
| 983 | return make_string (target, o - target); |
| 984 | } |
| 985 | #if 0 |
| 986 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. |
| 987 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 988 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 989 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 990 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 991 | the current buffer's value of default-directory is used.\n\ |
| 992 | Filenames containing `.' or `..' as components are simplified;\n\ |
| 993 | initial `~/' expands to your home directory.\n\ |
| 994 | See also the function `substitute-in-file-name'.") |
| 995 | (name, defalt) |
| 996 | Lisp_Object name, defalt; |
| 997 | { |
| 998 | unsigned char *nm; |
| 999 | |
| 1000 | register unsigned char *newdir, *p, *o; |
| 1001 | int tlen; |
| 1002 | unsigned char *target; |
| 1003 | struct passwd *pw; |
| 1004 | int lose; |
| 1005 | #ifdef VMS |
| 1006 | unsigned char * colon = 0; |
| 1007 | unsigned char * close = 0; |
| 1008 | unsigned char * slash = 0; |
| 1009 | unsigned char * brack = 0; |
| 1010 | int lbrack = 0, rbrack = 0; |
| 1011 | int dots = 0; |
| 1012 | #endif /* VMS */ |
| 1013 | |
| 1014 | CHECK_STRING (name, 0); |
| 1015 | |
| 1016 | #ifdef VMS |
| 1017 | /* Filenames on VMS are always upper case. */ |
| 1018 | name = Fupcase (name); |
| 1019 | #endif |
| 1020 | |
| 1021 | nm = XSTRING (name)->data; |
| 1022 | |
| 1023 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 1024 | If no /./ or /../ we can return right away. */ |
| 1025 | if ( |
| 1026 | nm[0] == '/' |
| 1027 | #ifdef VMS |
| 1028 | || index (nm, ':') |
| 1029 | #endif /* VMS */ |
| 1030 | ) |
| 1031 | { |
| 1032 | p = nm; |
| 1033 | lose = 0; |
| 1034 | while (*p) |
| 1035 | { |
| 1036 | if (p[0] == '/' && p[1] == '/' |
| 1037 | #ifdef APOLLO |
| 1038 | /* // at start of filename is meaningful on Apollo system */ |
| 1039 | && nm != p |
| 1040 | #endif /* APOLLO */ |
| 1041 | ) |
| 1042 | nm = p + 1; |
| 1043 | if (p[0] == '/' && p[1] == '~') |
| 1044 | nm = p + 1, lose = 1; |
| 1045 | if (p[0] == '/' && p[1] == '.' |
| 1046 | && (p[2] == '/' || p[2] == 0 |
| 1047 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) |
| 1048 | lose = 1; |
| 1049 | #ifdef VMS |
| 1050 | if (p[0] == '\\') |
| 1051 | lose = 1; |
| 1052 | if (p[0] == '/') { |
| 1053 | /* if dev:[dir]/, move nm to / */ |
| 1054 | if (!slash && p > nm && (brack || colon)) { |
| 1055 | nm = (brack ? brack + 1 : colon + 1); |
| 1056 | lbrack = rbrack = 0; |
| 1057 | brack = 0; |
| 1058 | colon = 0; |
| 1059 | } |
| 1060 | slash = p; |
| 1061 | } |
| 1062 | if (p[0] == '-') |
| 1063 | #ifndef VMS4_4 |
| 1064 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 1065 | if (lbrack == rbrack) |
| 1066 | { |
| 1067 | if (dots < 2) /* this is to allow negative version numbers */ |
| 1068 | p[0] = '_'; |
| 1069 | } |
| 1070 | else |
| 1071 | #endif /* VMS4_4 */ |
| 1072 | if (lbrack > rbrack && |
| 1073 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 1074 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 1075 | lose = 1; |
| 1076 | #ifndef VMS4_4 |
| 1077 | else |
| 1078 | p[0] = '_'; |
| 1079 | #endif /* VMS4_4 */ |
| 1080 | /* count open brackets, reset close bracket pointer */ |
| 1081 | if (p[0] == '[' || p[0] == '<') |
| 1082 | lbrack++, brack = 0; |
| 1083 | /* count close brackets, set close bracket pointer */ |
| 1084 | if (p[0] == ']' || p[0] == '>') |
| 1085 | rbrack++, brack = p; |
| 1086 | /* detect ][ or >< */ |
| 1087 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 1088 | lose = 1; |
| 1089 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 1090 | nm = p + 1, lose = 1; |
| 1091 | if (p[0] == ':' && (colon || slash)) |
| 1092 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 1093 | if (brack) |
| 1094 | { |
| 1095 | nm = brack + 1; |
| 1096 | brack = 0; |
| 1097 | } |
| 1098 | /* if /pathname/dev:, move nm to dev: */ |
| 1099 | else if (slash) |
| 1100 | nm = slash + 1; |
| 1101 | /* if node::dev:, move colon following dev */ |
| 1102 | else if (colon && colon[-1] == ':') |
| 1103 | colon = p; |
| 1104 | /* if dev1:dev2:, move nm to dev2: */ |
| 1105 | else if (colon && colon[-1] != ':') |
| 1106 | { |
| 1107 | nm = colon + 1; |
| 1108 | colon = 0; |
| 1109 | } |
| 1110 | if (p[0] == ':' && !colon) |
| 1111 | { |
| 1112 | if (p[1] == ':') |
| 1113 | p++; |
| 1114 | colon = p; |
| 1115 | } |
| 1116 | if (lbrack == rbrack) |
| 1117 | if (p[0] == ';') |
| 1118 | dots = 2; |
| 1119 | else if (p[0] == '.') |
| 1120 | dots++; |
| 1121 | #endif /* VMS */ |
| 1122 | p++; |
| 1123 | } |
| 1124 | if (!lose) |
| 1125 | { |
| 1126 | #ifdef VMS |
| 1127 | if (index (nm, '/')) |
| 1128 | return build_string (sys_translate_unix (nm)); |
| 1129 | #endif /* VMS */ |
| 1130 | if (nm == XSTRING (name)->data) |
| 1131 | return name; |
| 1132 | return build_string (nm); |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | /* Now determine directory to start with and put it in NEWDIR */ |
| 1137 | |
| 1138 | newdir = 0; |
| 1139 | |
| 1140 | if (nm[0] == '~') /* prefix ~ */ |
| 1141 | if (nm[1] == '/' |
| 1142 | #ifdef VMS |
| 1143 | || nm[1] == ':' |
| 1144 | #endif /* VMS */ |
| 1145 | || nm[1] == 0)/* ~/filename */ |
| 1146 | { |
| 1147 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 1148 | newdir = (unsigned char *) ""; |
| 1149 | nm++; |
| 1150 | #ifdef VMS |
| 1151 | nm++; /* Don't leave the slash in nm. */ |
| 1152 | #endif /* VMS */ |
| 1153 | } |
| 1154 | else /* ~user/filename */ |
| 1155 | { |
| 1156 | /* Get past ~ to user */ |
| 1157 | unsigned char *user = nm + 1; |
| 1158 | /* Find end of name. */ |
| 1159 | unsigned char *ptr = (unsigned char *) index (user, '/'); |
| 1160 | int len = ptr ? ptr - user : strlen (user); |
| 1161 | #ifdef VMS |
| 1162 | unsigned char *ptr1 = index (user, ':'); |
| 1163 | if (ptr1 != 0 && ptr1 - user < len) |
| 1164 | len = ptr1 - user; |
| 1165 | #endif /* VMS */ |
| 1166 | /* Copy the user name into temp storage. */ |
| 1167 | o = (unsigned char *) alloca (len + 1); |
| 1168 | bcopy ((char *) user, o, len); |
| 1169 | o[len] = 0; |
| 1170 | |
| 1171 | /* Look up the user name. */ |
| 1172 | pw = (struct passwd *) getpwnam (o + 1); |
| 1173 | if (!pw) |
| 1174 | error ("\"%s\" isn't a registered user", o + 1); |
| 1175 | |
| 1176 | newdir = (unsigned char *) pw->pw_dir; |
| 1177 | |
| 1178 | /* Discard the user name from NM. */ |
| 1179 | nm += len; |
| 1180 | } |
| 1181 | |
| 1182 | if (nm[0] != '/' |
| 1183 | #ifdef VMS |
| 1184 | && !index (nm, ':') |
| 1185 | #endif /* not VMS */ |
| 1186 | && !newdir) |
| 1187 | { |
| 1188 | if (NILP (defalt)) |
| 1189 | defalt = current_buffer->directory; |
| 1190 | CHECK_STRING (defalt, 1); |
| 1191 | newdir = XSTRING (defalt)->data; |
| 1192 | } |
| 1193 | |
| 1194 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1195 | |
| 1196 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; |
| 1197 | target = (unsigned char *) alloca (tlen); |
| 1198 | *target = 0; |
| 1199 | |
| 1200 | if (newdir) |
| 1201 | { |
| 1202 | #ifndef VMS |
| 1203 | if (nm[0] == 0 || nm[0] == '/') |
| 1204 | strcpy (target, newdir); |
| 1205 | else |
| 1206 | #endif |
| 1207 | file_name_as_directory (target, newdir); |
| 1208 | } |
| 1209 | |
| 1210 | strcat (target, nm); |
| 1211 | #ifdef VMS |
| 1212 | if (index (target, '/')) |
| 1213 | strcpy (target, sys_translate_unix (target)); |
| 1214 | #endif /* VMS */ |
| 1215 | |
| 1216 | /* Now canonicalize by removing /. and /foo/.. if they appear */ |
| 1217 | |
| 1218 | p = target; |
| 1219 | o = target; |
| 1220 | |
| 1221 | while (*p) |
| 1222 | { |
| 1223 | #ifdef VMS |
| 1224 | if (*p != ']' && *p != '>' && *p != '-') |
| 1225 | { |
| 1226 | if (*p == '\\') |
| 1227 | p++; |
| 1228 | *o++ = *p++; |
| 1229 | } |
| 1230 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 1231 | /* brackets are offset from each other by 2 */ |
| 1232 | { |
| 1233 | p += 2; |
| 1234 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 1235 | /* convert [foo][bar] to [bar] */ |
| 1236 | while (o[-1] != '[' && o[-1] != '<') |
| 1237 | o--; |
| 1238 | else if (*p == '-' && *o != '.') |
| 1239 | *--p = '.'; |
| 1240 | } |
| 1241 | else if (p[0] == '-' && o[-1] == '.' && |
| 1242 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 1243 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 1244 | { |
| 1245 | do |
| 1246 | o--; |
| 1247 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 1248 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 1249 | p += 2; |
| 1250 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 1251 | p++, o--; |
| 1252 | /* else [foo.-] ==> [-] */ |
| 1253 | } |
| 1254 | else |
| 1255 | { |
| 1256 | #ifndef VMS4_4 |
| 1257 | if (*p == '-' && |
| 1258 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 1259 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 1260 | *p = '_'; |
| 1261 | #endif /* VMS4_4 */ |
| 1262 | *o++ = *p++; |
| 1263 | } |
| 1264 | #else /* not VMS */ |
| 1265 | if (*p != '/') |
| 1266 | { |
| 1267 | *o++ = *p++; |
| 1268 | } |
| 1269 | else if (!strncmp (p, "//", 2) |
| 1270 | #ifdef APOLLO |
| 1271 | /* // at start of filename is meaningful in Apollo system */ |
| 1272 | && o != target |
| 1273 | #endif /* APOLLO */ |
| 1274 | ) |
| 1275 | { |
| 1276 | o = target; |
| 1277 | p++; |
| 1278 | } |
| 1279 | else if (p[0] == '/' && p[1] == '.' && |
| 1280 | (p[2] == '/' || p[2] == 0)) |
| 1281 | p += 2; |
| 1282 | else if (!strncmp (p, "/..", 3) |
| 1283 | /* `/../' is the "superroot" on certain file systems. */ |
| 1284 | && o != target |
| 1285 | && (p[3] == '/' || p[3] == 0)) |
| 1286 | { |
| 1287 | while (o != target && *--o != '/') |
| 1288 | ; |
| 1289 | #ifdef APOLLO |
| 1290 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 1291 | ++o; |
| 1292 | else |
| 1293 | #endif /* APOLLO */ |
| 1294 | if (o == target && *o == '/') |
| 1295 | ++o; |
| 1296 | p += 3; |
| 1297 | } |
| 1298 | else |
| 1299 | { |
| 1300 | *o++ = *p++; |
| 1301 | } |
| 1302 | #endif /* not VMS */ |
| 1303 | } |
| 1304 | |
| 1305 | return make_string (target, o - target); |
| 1306 | } |
| 1307 | #endif |
| 1308 | \f |
| 1309 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
| 1310 | Ssubstitute_in_file_name, 1, 1, 0, |
| 1311 | "Substitute environment variables referred to in FILENAME.\n\ |
| 1312 | `$FOO' where FOO is an environment variable name means to substitute\n\ |
| 1313 | the value of that variable. The variable name should be terminated\n\ |
| 1314 | with a character not a letter, digit or underscore; otherwise, enclose\n\ |
| 1315 | the entire variable name in braces.\n\ |
| 1316 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ |
| 1317 | On VMS, `$' substitution is not done; this function does little and only\n\ |
| 1318 | duplicates what `expand-file-name' does.") |
| 1319 | (string) |
| 1320 | Lisp_Object string; |
| 1321 | { |
| 1322 | unsigned char *nm; |
| 1323 | |
| 1324 | register unsigned char *s, *p, *o, *x, *endp; |
| 1325 | unsigned char *target; |
| 1326 | int total = 0; |
| 1327 | int substituted = 0; |
| 1328 | unsigned char *xnm; |
| 1329 | |
| 1330 | CHECK_STRING (string, 0); |
| 1331 | |
| 1332 | nm = XSTRING (string)->data; |
| 1333 | endp = nm + XSTRING (string)->size; |
| 1334 | |
| 1335 | /* If /~ or // appears, discard everything through first slash. */ |
| 1336 | |
| 1337 | for (p = nm; p != endp; p++) |
| 1338 | { |
| 1339 | if ((p[0] == '~' || |
| 1340 | #ifdef APOLLO |
| 1341 | /* // at start of file name is meaningful in Apollo system */ |
| 1342 | (p[0] == '/' && p - 1 != nm) |
| 1343 | #else /* not APOLLO */ |
| 1344 | p[0] == '/' |
| 1345 | #endif /* not APOLLO */ |
| 1346 | ) |
| 1347 | && p != nm && |
| 1348 | #ifdef VMS |
| 1349 | (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' || |
| 1350 | #endif /* VMS */ |
| 1351 | p[-1] == '/') |
| 1352 | #ifdef VMS |
| 1353 | ) |
| 1354 | #endif /* VMS */ |
| 1355 | { |
| 1356 | nm = p; |
| 1357 | substituted = 1; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | #ifdef VMS |
| 1362 | return build_string (nm); |
| 1363 | #else |
| 1364 | |
| 1365 | /* See if any variables are substituted into the string |
| 1366 | and find the total length of their values in `total' */ |
| 1367 | |
| 1368 | for (p = nm; p != endp;) |
| 1369 | if (*p != '$') |
| 1370 | p++; |
| 1371 | else |
| 1372 | { |
| 1373 | p++; |
| 1374 | if (p == endp) |
| 1375 | goto badsubst; |
| 1376 | else if (*p == '$') |
| 1377 | { |
| 1378 | /* "$$" means a single "$" */ |
| 1379 | p++; |
| 1380 | total -= 1; |
| 1381 | substituted = 1; |
| 1382 | continue; |
| 1383 | } |
| 1384 | else if (*p == '{') |
| 1385 | { |
| 1386 | o = ++p; |
| 1387 | while (p != endp && *p != '}') p++; |
| 1388 | if (*p != '}') goto missingclose; |
| 1389 | s = p; |
| 1390 | } |
| 1391 | else |
| 1392 | { |
| 1393 | o = p; |
| 1394 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1395 | s = p; |
| 1396 | } |
| 1397 | |
| 1398 | /* Copy out the variable name */ |
| 1399 | target = (unsigned char *) alloca (s - o + 1); |
| 1400 | strncpy (target, o, s - o); |
| 1401 | target[s - o] = 0; |
| 1402 | |
| 1403 | /* Get variable value */ |
| 1404 | o = (unsigned char *) egetenv (target); |
| 1405 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ |
| 1406 | #if 0 |
| 1407 | #ifdef USG |
| 1408 | if (!o && !strcmp (target, "USER")) |
| 1409 | o = egetenv ("LOGNAME"); |
| 1410 | #endif /* USG */ |
| 1411 | #endif /* 0 */ |
| 1412 | if (!o) goto badvar; |
| 1413 | total += strlen (o); |
| 1414 | substituted = 1; |
| 1415 | } |
| 1416 | |
| 1417 | if (!substituted) |
| 1418 | return string; |
| 1419 | |
| 1420 | /* If substitution required, recopy the string and do it */ |
| 1421 | /* Make space in stack frame for the new copy */ |
| 1422 | xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1); |
| 1423 | x = xnm; |
| 1424 | |
| 1425 | /* Copy the rest of the name through, replacing $ constructs with values */ |
| 1426 | for (p = nm; *p;) |
| 1427 | if (*p != '$') |
| 1428 | *x++ = *p++; |
| 1429 | else |
| 1430 | { |
| 1431 | p++; |
| 1432 | if (p == endp) |
| 1433 | goto badsubst; |
| 1434 | else if (*p == '$') |
| 1435 | { |
| 1436 | *x++ = *p++; |
| 1437 | continue; |
| 1438 | } |
| 1439 | else if (*p == '{') |
| 1440 | { |
| 1441 | o = ++p; |
| 1442 | while (p != endp && *p != '}') p++; |
| 1443 | if (*p != '}') goto missingclose; |
| 1444 | s = p++; |
| 1445 | } |
| 1446 | else |
| 1447 | { |
| 1448 | o = p; |
| 1449 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1450 | s = p; |
| 1451 | } |
| 1452 | |
| 1453 | /* Copy out the variable name */ |
| 1454 | target = (unsigned char *) alloca (s - o + 1); |
| 1455 | strncpy (target, o, s - o); |
| 1456 | target[s - o] = 0; |
| 1457 | |
| 1458 | /* Get variable value */ |
| 1459 | o = (unsigned char *) egetenv (target); |
| 1460 | /* The presence of this code makes vax 5.0 crash, for reasons yet unknown */ |
| 1461 | #if 0 |
| 1462 | #ifdef USG |
| 1463 | if (!o && !strcmp (target, "USER")) |
| 1464 | o = egetenv ("LOGNAME"); |
| 1465 | #endif /* USG */ |
| 1466 | #endif /* 0 */ |
| 1467 | if (!o) |
| 1468 | goto badvar; |
| 1469 | |
| 1470 | strcpy (x, o); |
| 1471 | x += strlen (o); |
| 1472 | } |
| 1473 | |
| 1474 | *x = 0; |
| 1475 | |
| 1476 | /* If /~ or // appears, discard everything through first slash. */ |
| 1477 | |
| 1478 | for (p = xnm; p != x; p++) |
| 1479 | if ((p[0] == '~' || |
| 1480 | #ifdef APOLLO |
| 1481 | /* // at start of file name is meaningful in Apollo system */ |
| 1482 | (p[0] == '/' && p - 1 != xnm) |
| 1483 | #else /* not APOLLO */ |
| 1484 | p[0] == '/' |
| 1485 | #endif /* not APOLLO */ |
| 1486 | ) |
| 1487 | && p != nm && p[-1] == '/') |
| 1488 | xnm = p; |
| 1489 | |
| 1490 | return make_string (xnm, x - xnm); |
| 1491 | |
| 1492 | badsubst: |
| 1493 | error ("Bad format environment-variable substitution"); |
| 1494 | missingclose: |
| 1495 | error ("Missing \"}\" in environment-variable substitution"); |
| 1496 | badvar: |
| 1497 | error ("Substituting nonexistent environment variable \"%s\"", target); |
| 1498 | |
| 1499 | /* NOTREACHED */ |
| 1500 | #endif /* not VMS */ |
| 1501 | } |
| 1502 | \f |
| 1503 | /* A slightly faster and more convenient way to get |
| 1504 | (directory-file-name (expand-file-name FOO)). The return value may |
| 1505 | have had its last character zapped with a '\0' character, meaning |
| 1506 | that it is acceptable to system calls, but not to other lisp |
| 1507 | functions. Callers should make sure that the return value doesn't |
| 1508 | escape. */ |
| 1509 | |
| 1510 | Lisp_Object |
| 1511 | expand_and_dir_to_file (filename, defdir) |
| 1512 | Lisp_Object filename, defdir; |
| 1513 | { |
| 1514 | register Lisp_Object abspath; |
| 1515 | |
| 1516 | abspath = Fexpand_file_name (filename, defdir); |
| 1517 | #ifdef VMS |
| 1518 | { |
| 1519 | register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1]; |
| 1520 | if (c == ':' || c == ']' || c == '>') |
| 1521 | abspath = Fdirectory_file_name (abspath); |
| 1522 | } |
| 1523 | #else |
| 1524 | /* Remove final slash, if any (unless path is root). |
| 1525 | stat behaves differently depending! */ |
| 1526 | if (XSTRING (abspath)->size > 1 |
| 1527 | && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/') |
| 1528 | { |
| 1529 | if (EQ (abspath, filename)) |
| 1530 | abspath = Fcopy_sequence (abspath); |
| 1531 | XSTRING (abspath)->data[XSTRING (abspath)->size - 1] = 0; |
| 1532 | } |
| 1533 | #endif |
| 1534 | return abspath; |
| 1535 | } |
| 1536 | \f |
| 1537 | barf_or_query_if_file_exists (absname, querystring, interactive) |
| 1538 | Lisp_Object absname; |
| 1539 | unsigned char *querystring; |
| 1540 | int interactive; |
| 1541 | { |
| 1542 | register Lisp_Object tem; |
| 1543 | struct gcpro gcpro1; |
| 1544 | |
| 1545 | if (access (XSTRING (absname)->data, 4) >= 0) |
| 1546 | { |
| 1547 | if (! interactive) |
| 1548 | Fsignal (Qfile_already_exists, |
| 1549 | Fcons (build_string ("File already exists"), |
| 1550 | Fcons (absname, Qnil))); |
| 1551 | GCPRO1 (absname); |
| 1552 | tem = do_yes_or_no_p (format1 ("File %s already exists; %s anyway? ", |
| 1553 | XSTRING (absname)->data, querystring)); |
| 1554 | UNGCPRO; |
| 1555 | if (NILP (tem)) |
| 1556 | Fsignal (Qfile_already_exists, |
| 1557 | Fcons (build_string ("File already exists"), |
| 1558 | Fcons (absname, Qnil))); |
| 1559 | } |
| 1560 | return; |
| 1561 | } |
| 1562 | |
| 1563 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, |
| 1564 | "fCopy file: \nFCopy %s to file: \np\nP", |
| 1565 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
| 1566 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ |
| 1567 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ |
| 1568 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1569 | This is what happens in interactive use with M-x.\n\ |
| 1570 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
| 1571 | last-modified time as the old one. (This works on only some systems.)\n\ |
| 1572 | A prefix arg makes KEEP-TIME non-nil.") |
| 1573 | (filename, newname, ok_if_already_exists, keep_date) |
| 1574 | Lisp_Object filename, newname, ok_if_already_exists, keep_date; |
| 1575 | { |
| 1576 | int ifd, ofd, n; |
| 1577 | char buf[16 * 1024]; |
| 1578 | struct stat st; |
| 1579 | Lisp_Object handler; |
| 1580 | struct gcpro gcpro1, gcpro2; |
| 1581 | int count = specpdl_ptr - specpdl; |
| 1582 | |
| 1583 | GCPRO2 (filename, newname); |
| 1584 | CHECK_STRING (filename, 0); |
| 1585 | CHECK_STRING (newname, 1); |
| 1586 | filename = Fexpand_file_name (filename, Qnil); |
| 1587 | newname = Fexpand_file_name (newname, Qnil); |
| 1588 | |
| 1589 | /* If the input file name has special constructs in it, |
| 1590 | call the corresponding file handler. */ |
| 1591 | handler = Ffind_file_name_handler (filename); |
| 1592 | if (!NILP (handler)) |
| 1593 | return call3 (handler, Qcopy_file, filename, newname); |
| 1594 | /* Likewise for output file name. */ |
| 1595 | handler = Ffind_file_name_handler (newname); |
| 1596 | if (!NILP (handler)) |
| 1597 | return call3 (handler, Qcopy_file, filename, newname); |
| 1598 | |
| 1599 | if (NILP (ok_if_already_exists) |
| 1600 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1601 | barf_or_query_if_file_exists (newname, "copy to it", |
| 1602 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1603 | |
| 1604 | ifd = open (XSTRING (filename)->data, 0); |
| 1605 | if (ifd < 0) |
| 1606 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 1607 | |
| 1608 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
| 1609 | |
| 1610 | #ifdef VMS |
| 1611 | /* Create the copy file with the same record format as the input file */ |
| 1612 | ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); |
| 1613 | #else |
| 1614 | ofd = creat (XSTRING (newname)->data, 0666); |
| 1615 | #endif /* VMS */ |
| 1616 | if (ofd < 0) |
| 1617 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
| 1618 | |
| 1619 | record_unwind_protect (close_file_unwind, make_number (ofd)); |
| 1620 | |
| 1621 | immediate_quit = 1; |
| 1622 | QUIT; |
| 1623 | while ((n = read (ifd, buf, sizeof buf)) > 0) |
| 1624 | if (write (ofd, buf, n) != n) |
| 1625 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1626 | immediate_quit = 0; |
| 1627 | |
| 1628 | if (fstat (ifd, &st) >= 0) |
| 1629 | { |
| 1630 | if (!NILP (keep_date)) |
| 1631 | { |
| 1632 | EMACS_TIME atime, mtime; |
| 1633 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); |
| 1634 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); |
| 1635 | EMACS_SET_UTIMES (XSTRING (newname)->data, atime, mtime); |
| 1636 | } |
| 1637 | #ifdef APOLLO |
| 1638 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 1639 | #endif |
| 1640 | chmod (XSTRING (newname)->data, st.st_mode & 07777); |
| 1641 | } |
| 1642 | |
| 1643 | /* Discard the unwind protects. */ |
| 1644 | specpdl_ptr = specpdl + count; |
| 1645 | |
| 1646 | close (ifd); |
| 1647 | if (close (ofd) < 0) |
| 1648 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1649 | |
| 1650 | UNGCPRO; |
| 1651 | return Qnil; |
| 1652 | } |
| 1653 | |
| 1654 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
| 1655 | Smake_directory_internal, 1, 1, 0, |
| 1656 | "Create a directory. One argument, a file name string.") |
| 1657 | (dirname) |
| 1658 | Lisp_Object dirname; |
| 1659 | { |
| 1660 | unsigned char *dir; |
| 1661 | Lisp_Object handler; |
| 1662 | |
| 1663 | CHECK_STRING (dirname, 0); |
| 1664 | dirname = Fexpand_file_name (dirname, Qnil); |
| 1665 | |
| 1666 | handler = Ffind_file_name_handler (dirname); |
| 1667 | if (!NILP (handler)) |
| 1668 | return call3 (handler, Qmake_directory, dirname, Qnil); |
| 1669 | |
| 1670 | dir = XSTRING (dirname)->data; |
| 1671 | |
| 1672 | if (mkdir (dir, 0777) != 0) |
| 1673 | report_file_error ("Creating directory", Flist (1, &dirname)); |
| 1674 | |
| 1675 | return Qnil; |
| 1676 | } |
| 1677 | |
| 1678 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
| 1679 | "Delete a directory. One argument, a file name string.") |
| 1680 | (dirname) |
| 1681 | Lisp_Object dirname; |
| 1682 | { |
| 1683 | unsigned char *dir; |
| 1684 | Lisp_Object handler; |
| 1685 | |
| 1686 | CHECK_STRING (dirname, 0); |
| 1687 | dirname = Fexpand_file_name (dirname, Qnil); |
| 1688 | dir = XSTRING (dirname)->data; |
| 1689 | |
| 1690 | handler = Ffind_file_name_handler (dirname); |
| 1691 | if (!NILP (handler)) |
| 1692 | return call2 (handler, Qdelete_directory, dirname); |
| 1693 | |
| 1694 | if (rmdir (dir) != 0) |
| 1695 | report_file_error ("Removing directory", Flist (1, &dirname)); |
| 1696 | |
| 1697 | return Qnil; |
| 1698 | } |
| 1699 | |
| 1700 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", |
| 1701 | "Delete specified file. One argument, a file name string.\n\ |
| 1702 | If file has multiple names, it continues to exist with the other names.") |
| 1703 | (filename) |
| 1704 | Lisp_Object filename; |
| 1705 | { |
| 1706 | Lisp_Object handler; |
| 1707 | CHECK_STRING (filename, 0); |
| 1708 | filename = Fexpand_file_name (filename, Qnil); |
| 1709 | |
| 1710 | handler = Ffind_file_name_handler (filename); |
| 1711 | if (!NILP (handler)) |
| 1712 | return call2 (handler, Qdelete_file, filename); |
| 1713 | |
| 1714 | if (0 > unlink (XSTRING (filename)->data)) |
| 1715 | report_file_error ("Removing old name", Flist (1, &filename)); |
| 1716 | return Qnil; |
| 1717 | } |
| 1718 | |
| 1719 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
| 1720 | "fRename file: \nFRename %s to file: \np", |
| 1721 | "Rename FILE as NEWNAME. Both args strings.\n\ |
| 1722 | If file has names other than FILE, it continues to have those names.\n\ |
| 1723 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1724 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1725 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1726 | This is what happens in interactive use with M-x.") |
| 1727 | (filename, newname, ok_if_already_exists) |
| 1728 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1729 | { |
| 1730 | #ifdef NO_ARG_ARRAY |
| 1731 | Lisp_Object args[2]; |
| 1732 | #endif |
| 1733 | Lisp_Object handler; |
| 1734 | struct gcpro gcpro1, gcpro2; |
| 1735 | |
| 1736 | GCPRO2 (filename, newname); |
| 1737 | CHECK_STRING (filename, 0); |
| 1738 | CHECK_STRING (newname, 1); |
| 1739 | filename = Fexpand_file_name (filename, Qnil); |
| 1740 | newname = Fexpand_file_name (newname, Qnil); |
| 1741 | |
| 1742 | /* If the file name has special constructs in it, |
| 1743 | call the corresponding file handler. */ |
| 1744 | handler = Ffind_file_name_handler (filename); |
| 1745 | if (!NILP (handler)) |
| 1746 | return call3 (handler, Qrename_file, filename, newname); |
| 1747 | |
| 1748 | if (NILP (ok_if_already_exists) |
| 1749 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1750 | barf_or_query_if_file_exists (newname, "rename to it", |
| 1751 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1752 | #ifndef BSD4_1 |
| 1753 | if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 1754 | #else |
| 1755 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data) |
| 1756 | || 0 > unlink (XSTRING (filename)->data)) |
| 1757 | #endif |
| 1758 | { |
| 1759 | if (errno == EXDEV) |
| 1760 | { |
| 1761 | Fcopy_file (filename, newname, ok_if_already_exists, Qt); |
| 1762 | Fdelete_file (filename); |
| 1763 | } |
| 1764 | else |
| 1765 | #ifdef NO_ARG_ARRAY |
| 1766 | { |
| 1767 | args[0] = filename; |
| 1768 | args[1] = newname; |
| 1769 | report_file_error ("Renaming", Flist (2, args)); |
| 1770 | } |
| 1771 | #else |
| 1772 | report_file_error ("Renaming", Flist (2, &filename)); |
| 1773 | #endif |
| 1774 | } |
| 1775 | UNGCPRO; |
| 1776 | return Qnil; |
| 1777 | } |
| 1778 | |
| 1779 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, |
| 1780 | "fAdd name to file: \nFName to add to %s: \np", |
| 1781 | "Give FILE additional name NEWNAME. Both args strings.\n\ |
| 1782 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1783 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1784 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1785 | This is what happens in interactive use with M-x.") |
| 1786 | (filename, newname, ok_if_already_exists) |
| 1787 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1788 | { |
| 1789 | #ifdef NO_ARG_ARRAY |
| 1790 | Lisp_Object args[2]; |
| 1791 | #endif |
| 1792 | Lisp_Object handler; |
| 1793 | struct gcpro gcpro1, gcpro2; |
| 1794 | |
| 1795 | GCPRO2 (filename, newname); |
| 1796 | CHECK_STRING (filename, 0); |
| 1797 | CHECK_STRING (newname, 1); |
| 1798 | filename = Fexpand_file_name (filename, Qnil); |
| 1799 | newname = Fexpand_file_name (newname, Qnil); |
| 1800 | |
| 1801 | /* If the file name has special constructs in it, |
| 1802 | call the corresponding file handler. */ |
| 1803 | handler = Ffind_file_name_handler (filename); |
| 1804 | if (!NILP (handler)) |
| 1805 | return call3 (handler, Qadd_name_to_file, filename, newname); |
| 1806 | |
| 1807 | if (NILP (ok_if_already_exists) |
| 1808 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1809 | barf_or_query_if_file_exists (newname, "make it a new name", |
| 1810 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1811 | unlink (XSTRING (newname)->data); |
| 1812 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 1813 | { |
| 1814 | #ifdef NO_ARG_ARRAY |
| 1815 | args[0] = filename; |
| 1816 | args[1] = newname; |
| 1817 | report_file_error ("Adding new name", Flist (2, args)); |
| 1818 | #else |
| 1819 | report_file_error ("Adding new name", Flist (2, &filename)); |
| 1820 | #endif |
| 1821 | } |
| 1822 | |
| 1823 | UNGCPRO; |
| 1824 | return Qnil; |
| 1825 | } |
| 1826 | |
| 1827 | #ifdef S_IFLNK |
| 1828 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
| 1829 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", |
| 1830 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ |
| 1831 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1832 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1833 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1834 | This happens for interactive use with M-x.") |
| 1835 | (filename, linkname, ok_if_already_exists) |
| 1836 | Lisp_Object filename, linkname, ok_if_already_exists; |
| 1837 | { |
| 1838 | #ifdef NO_ARG_ARRAY |
| 1839 | Lisp_Object args[2]; |
| 1840 | #endif |
| 1841 | Lisp_Object handler; |
| 1842 | struct gcpro gcpro1, gcpro2; |
| 1843 | |
| 1844 | GCPRO2 (filename, linkname); |
| 1845 | CHECK_STRING (filename, 0); |
| 1846 | CHECK_STRING (linkname, 1); |
| 1847 | #if 0 /* This made it impossible to make a link to a relative name. */ |
| 1848 | filename = Fexpand_file_name (filename, Qnil); |
| 1849 | #endif |
| 1850 | linkname = Fexpand_file_name (linkname, Qnil); |
| 1851 | |
| 1852 | /* If the file name has special constructs in it, |
| 1853 | call the corresponding file handler. */ |
| 1854 | handler = Ffind_file_name_handler (filename); |
| 1855 | if (!NILP (handler)) |
| 1856 | return call3 (handler, Qmake_symbolic_link, filename, linkname); |
| 1857 | |
| 1858 | if (NILP (ok_if_already_exists) |
| 1859 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1860 | barf_or_query_if_file_exists (linkname, "make it a link", |
| 1861 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1862 | if (0 > symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 1863 | { |
| 1864 | /* If we didn't complain already, silently delete existing file. */ |
| 1865 | if (errno == EEXIST) |
| 1866 | { |
| 1867 | unlink (XSTRING (linkname)->data); |
| 1868 | if (0 <= symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 1869 | return Qnil; |
| 1870 | } |
| 1871 | |
| 1872 | #ifdef NO_ARG_ARRAY |
| 1873 | args[0] = filename; |
| 1874 | args[1] = linkname; |
| 1875 | report_file_error ("Making symbolic link", Flist (2, args)); |
| 1876 | #else |
| 1877 | report_file_error ("Making symbolic link", Flist (2, &filename)); |
| 1878 | #endif |
| 1879 | } |
| 1880 | UNGCPRO; |
| 1881 | return Qnil; |
| 1882 | } |
| 1883 | #endif /* S_IFLNK */ |
| 1884 | |
| 1885 | #ifdef VMS |
| 1886 | |
| 1887 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, |
| 1888 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", |
| 1889 | "Define the job-wide logical name NAME to have the value STRING.\n\ |
| 1890 | If STRING is nil or a null string, the logical name NAME is deleted.") |
| 1891 | (varname, string) |
| 1892 | Lisp_Object varname; |
| 1893 | Lisp_Object string; |
| 1894 | { |
| 1895 | CHECK_STRING (varname, 0); |
| 1896 | if (NILP (string)) |
| 1897 | delete_logical_name (XSTRING (varname)->data); |
| 1898 | else |
| 1899 | { |
| 1900 | CHECK_STRING (string, 1); |
| 1901 | |
| 1902 | if (XSTRING (string)->size == 0) |
| 1903 | delete_logical_name (XSTRING (varname)->data); |
| 1904 | else |
| 1905 | define_logical_name (XSTRING (varname)->data, XSTRING (string)->data); |
| 1906 | } |
| 1907 | |
| 1908 | return string; |
| 1909 | } |
| 1910 | #endif /* VMS */ |
| 1911 | |
| 1912 | #ifdef HPUX_NET |
| 1913 | |
| 1914 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, |
| 1915 | "Open a network connection to PATH using LOGIN as the login string.") |
| 1916 | (path, login) |
| 1917 | Lisp_Object path, login; |
| 1918 | { |
| 1919 | int netresult; |
| 1920 | |
| 1921 | CHECK_STRING (path, 0); |
| 1922 | CHECK_STRING (login, 0); |
| 1923 | |
| 1924 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); |
| 1925 | |
| 1926 | if (netresult == -1) |
| 1927 | return Qnil; |
| 1928 | else |
| 1929 | return Qt; |
| 1930 | } |
| 1931 | #endif /* HPUX_NET */ |
| 1932 | \f |
| 1933 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
| 1934 | 1, 1, 0, |
| 1935 | "Return t if file FILENAME specifies an absolute path name.\n\ |
| 1936 | On Unix, this is a name starting with a `/' or a `~'.") |
| 1937 | (filename) |
| 1938 | Lisp_Object filename; |
| 1939 | { |
| 1940 | unsigned char *ptr; |
| 1941 | |
| 1942 | CHECK_STRING (filename, 0); |
| 1943 | ptr = XSTRING (filename)->data; |
| 1944 | if (*ptr == '/' || *ptr == '~' |
| 1945 | #ifdef VMS |
| 1946 | /* ??? This criterion is probably wrong for '<'. */ |
| 1947 | || index (ptr, ':') || index (ptr, '<') |
| 1948 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) |
| 1949 | && ptr[1] != '.') |
| 1950 | #endif /* VMS */ |
| 1951 | ) |
| 1952 | return Qt; |
| 1953 | else |
| 1954 | return Qnil; |
| 1955 | } |
| 1956 | |
| 1957 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
| 1958 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ |
| 1959 | See also `file-readable-p' and `file-attributes'.") |
| 1960 | (filename) |
| 1961 | Lisp_Object filename; |
| 1962 | { |
| 1963 | Lisp_Object abspath; |
| 1964 | Lisp_Object handler; |
| 1965 | |
| 1966 | CHECK_STRING (filename, 0); |
| 1967 | abspath = Fexpand_file_name (filename, Qnil); |
| 1968 | |
| 1969 | /* If the file name has special constructs in it, |
| 1970 | call the corresponding file handler. */ |
| 1971 | handler = Ffind_file_name_handler (abspath); |
| 1972 | if (!NILP (handler)) |
| 1973 | return call2 (handler, Qfile_exists_p, abspath); |
| 1974 | |
| 1975 | return (access (XSTRING (abspath)->data, 0) >= 0) ? Qt : Qnil; |
| 1976 | } |
| 1977 | |
| 1978 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, |
| 1979 | "Return t if FILENAME can be executed by you.\n\ |
| 1980 | For a directory, this means you can access files in that directory.") |
| 1981 | (filename) |
| 1982 | Lisp_Object filename; |
| 1983 | |
| 1984 | { |
| 1985 | Lisp_Object abspath; |
| 1986 | Lisp_Object handler; |
| 1987 | |
| 1988 | CHECK_STRING (filename, 0); |
| 1989 | abspath = Fexpand_file_name (filename, Qnil); |
| 1990 | |
| 1991 | /* If the file name has special constructs in it, |
| 1992 | call the corresponding file handler. */ |
| 1993 | handler = Ffind_file_name_handler (abspath); |
| 1994 | if (!NILP (handler)) |
| 1995 | return call2 (handler, Qfile_executable_p, abspath); |
| 1996 | |
| 1997 | return (access (XSTRING (abspath)->data, 1) >= 0) ? Qt : Qnil; |
| 1998 | } |
| 1999 | |
| 2000 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
| 2001 | "Return t if file FILENAME exists and you can read it.\n\ |
| 2002 | See also `file-exists-p' and `file-attributes'.") |
| 2003 | (filename) |
| 2004 | Lisp_Object filename; |
| 2005 | { |
| 2006 | Lisp_Object abspath; |
| 2007 | Lisp_Object handler; |
| 2008 | |
| 2009 | CHECK_STRING (filename, 0); |
| 2010 | abspath = Fexpand_file_name (filename, Qnil); |
| 2011 | |
| 2012 | /* If the file name has special constructs in it, |
| 2013 | call the corresponding file handler. */ |
| 2014 | handler = Ffind_file_name_handler (abspath); |
| 2015 | if (!NILP (handler)) |
| 2016 | return call2 (handler, Qfile_readable_p, abspath); |
| 2017 | |
| 2018 | return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil; |
| 2019 | } |
| 2020 | |
| 2021 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
| 2022 | "If file FILENAME is the name of a symbolic link\n\ |
| 2023 | returns the name of the file to which it is linked.\n\ |
| 2024 | Otherwise returns NIL.") |
| 2025 | (filename) |
| 2026 | Lisp_Object filename; |
| 2027 | { |
| 2028 | #ifdef S_IFLNK |
| 2029 | char *buf; |
| 2030 | int bufsize; |
| 2031 | int valsize; |
| 2032 | Lisp_Object val; |
| 2033 | Lisp_Object handler; |
| 2034 | |
| 2035 | CHECK_STRING (filename, 0); |
| 2036 | filename = Fexpand_file_name (filename, Qnil); |
| 2037 | |
| 2038 | /* If the file name has special constructs in it, |
| 2039 | call the corresponding file handler. */ |
| 2040 | handler = Ffind_file_name_handler (filename); |
| 2041 | if (!NILP (handler)) |
| 2042 | return call2 (handler, Qfile_symlink_p, filename); |
| 2043 | |
| 2044 | bufsize = 100; |
| 2045 | while (1) |
| 2046 | { |
| 2047 | buf = (char *) xmalloc (bufsize); |
| 2048 | bzero (buf, bufsize); |
| 2049 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); |
| 2050 | if (valsize < bufsize) break; |
| 2051 | /* Buffer was not long enough */ |
| 2052 | xfree (buf); |
| 2053 | bufsize *= 2; |
| 2054 | } |
| 2055 | if (valsize == -1) |
| 2056 | { |
| 2057 | xfree (buf); |
| 2058 | return Qnil; |
| 2059 | } |
| 2060 | val = make_string (buf, valsize); |
| 2061 | xfree (buf); |
| 2062 | return val; |
| 2063 | #else /* not S_IFLNK */ |
| 2064 | return Qnil; |
| 2065 | #endif /* not S_IFLNK */ |
| 2066 | } |
| 2067 | |
| 2068 | #ifdef SOLARIS_BROKEN_ACCESS |
| 2069 | /* In Solaris 2.1, the readonly-ness of the filesystem is not |
| 2070 | considered by the access system call. This is Sun's bug, but we |
| 2071 | still have to make Emacs work. */ |
| 2072 | |
| 2073 | #include <sys/statvfs.h> |
| 2074 | |
| 2075 | static int |
| 2076 | ro_fsys (path) |
| 2077 | char *path; |
| 2078 | { |
| 2079 | struct statvfs statvfsb; |
| 2080 | |
| 2081 | if (statvfs(path, &statvfsb)) |
| 2082 | return 1; /* error from statvfs, be conservative and say not wrtable */ |
| 2083 | else |
| 2084 | /* Otherwise, fsys is ro if bit is set. */ |
| 2085 | return statvfsb.f_flag & ST_RDONLY; |
| 2086 | } |
| 2087 | #else |
| 2088 | /* But on every other os, access has already done the right thing. */ |
| 2089 | #define ro_fsys(path) 0 |
| 2090 | #endif |
| 2091 | |
| 2092 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
| 2093 | on the RT/PC. */ |
| 2094 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
| 2095 | "Return t if file FILENAME can be written or created by you.") |
| 2096 | (filename) |
| 2097 | Lisp_Object filename; |
| 2098 | { |
| 2099 | Lisp_Object abspath, dir; |
| 2100 | Lisp_Object handler; |
| 2101 | |
| 2102 | CHECK_STRING (filename, 0); |
| 2103 | abspath = Fexpand_file_name (filename, Qnil); |
| 2104 | |
| 2105 | /* If the file name has special constructs in it, |
| 2106 | call the corresponding file handler. */ |
| 2107 | handler = Ffind_file_name_handler (abspath); |
| 2108 | if (!NILP (handler)) |
| 2109 | return call2 (handler, Qfile_writable_p, abspath); |
| 2110 | |
| 2111 | if (access (XSTRING (abspath)->data, 0) >= 0) |
| 2112 | return ((access (XSTRING (abspath)->data, 2) >= 0 |
| 2113 | && ! ro_fsys (XSTRING (abspath))) |
| 2114 | ? Qt : Qnil); |
| 2115 | dir = Ffile_name_directory (abspath); |
| 2116 | #ifdef VMS |
| 2117 | if (!NILP (dir)) |
| 2118 | dir = Fdirectory_file_name (dir); |
| 2119 | #endif /* VMS */ |
| 2120 | return ((access (!NILP (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0 |
| 2121 | && ! ro_fsys ((char *) XSTRING (dir))) |
| 2122 | ? Qt : Qnil); |
| 2123 | } |
| 2124 | |
| 2125 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
| 2126 | "Return t if file FILENAME is the name of a directory as a file.\n\ |
| 2127 | A directory name spec may be given instead; then the value is t\n\ |
| 2128 | if the directory so specified exists and really is a directory.") |
| 2129 | (filename) |
| 2130 | Lisp_Object filename; |
| 2131 | { |
| 2132 | register Lisp_Object abspath; |
| 2133 | struct stat st; |
| 2134 | Lisp_Object handler; |
| 2135 | |
| 2136 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2137 | |
| 2138 | /* If the file name has special constructs in it, |
| 2139 | call the corresponding file handler. */ |
| 2140 | handler = Ffind_file_name_handler (abspath); |
| 2141 | if (!NILP (handler)) |
| 2142 | return call2 (handler, Qfile_directory_p, abspath); |
| 2143 | |
| 2144 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2145 | return Qnil; |
| 2146 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; |
| 2147 | } |
| 2148 | |
| 2149 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
| 2150 | "Return t if file FILENAME is the name of a directory as a file,\n\ |
| 2151 | and files in that directory can be opened by you. In order to use a\n\ |
| 2152 | directory as a buffer's current directory, this predicate must return true.\n\ |
| 2153 | A directory name spec may be given instead; then the value is t\n\ |
| 2154 | if the directory so specified exists and really is a readable and\n\ |
| 2155 | searchable directory.") |
| 2156 | (filename) |
| 2157 | Lisp_Object filename; |
| 2158 | { |
| 2159 | Lisp_Object handler; |
| 2160 | |
| 2161 | /* If the file name has special constructs in it, |
| 2162 | call the corresponding file handler. */ |
| 2163 | handler = Ffind_file_name_handler (filename); |
| 2164 | if (!NILP (handler)) |
| 2165 | return call2 (handler, Qfile_accessible_directory_p, filename); |
| 2166 | |
| 2167 | if (NILP (Ffile_directory_p (filename)) |
| 2168 | || NILP (Ffile_executable_p (filename))) |
| 2169 | return Qnil; |
| 2170 | else |
| 2171 | return Qt; |
| 2172 | } |
| 2173 | |
| 2174 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
| 2175 | "Return mode bits of FILE, as an integer.") |
| 2176 | (filename) |
| 2177 | Lisp_Object filename; |
| 2178 | { |
| 2179 | Lisp_Object abspath; |
| 2180 | struct stat st; |
| 2181 | Lisp_Object handler; |
| 2182 | |
| 2183 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2184 | |
| 2185 | /* If the file name has special constructs in it, |
| 2186 | call the corresponding file handler. */ |
| 2187 | handler = Ffind_file_name_handler (abspath); |
| 2188 | if (!NILP (handler)) |
| 2189 | return call2 (handler, Qfile_modes, abspath); |
| 2190 | |
| 2191 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2192 | return Qnil; |
| 2193 | return make_number (st.st_mode & 07777); |
| 2194 | } |
| 2195 | |
| 2196 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, |
| 2197 | "Set mode bits of FILE to MODE (an integer).\n\ |
| 2198 | Only the 12 low bits of MODE are used.") |
| 2199 | (filename, mode) |
| 2200 | Lisp_Object filename, mode; |
| 2201 | { |
| 2202 | Lisp_Object abspath; |
| 2203 | Lisp_Object handler; |
| 2204 | |
| 2205 | abspath = Fexpand_file_name (filename, current_buffer->directory); |
| 2206 | CHECK_NUMBER (mode, 1); |
| 2207 | |
| 2208 | /* If the file name has special constructs in it, |
| 2209 | call the corresponding file handler. */ |
| 2210 | handler = Ffind_file_name_handler (abspath); |
| 2211 | if (!NILP (handler)) |
| 2212 | return call3 (handler, Qset_file_modes, abspath, mode); |
| 2213 | |
| 2214 | #ifndef APOLLO |
| 2215 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2216 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2217 | #else /* APOLLO */ |
| 2218 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 2219 | { |
| 2220 | struct stat st; |
| 2221 | struct timeval tvp[2]; |
| 2222 | |
| 2223 | /* chmod on apollo also change the file's modtime; need to save the |
| 2224 | modtime and then restore it. */ |
| 2225 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2226 | { |
| 2227 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2228 | return (Qnil); |
| 2229 | } |
| 2230 | |
| 2231 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2232 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2233 | |
| 2234 | /* reset the old accessed and modified times. */ |
| 2235 | tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2236 | tvp[0].tv_usec = 0; |
| 2237 | tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2238 | tvp[1].tv_usec = 0; |
| 2239 | |
| 2240 | if (utimes (XSTRING (abspath)->data, tvp) < 0) |
| 2241 | report_file_error ("Doing utimes", Fcons (abspath, Qnil)); |
| 2242 | } |
| 2243 | #endif /* APOLLO */ |
| 2244 | |
| 2245 | return Qnil; |
| 2246 | } |
| 2247 | |
| 2248 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
| 2249 | "Set the file permission bits for newly created files.\n\ |
| 2250 | The argument MODE should be an integer; only the low 9 bits are used.\n\ |
| 2251 | This setting is inherited by subprocesses.") |
| 2252 | (mode) |
| 2253 | Lisp_Object mode; |
| 2254 | { |
| 2255 | CHECK_NUMBER (mode, 0); |
| 2256 | |
| 2257 | umask ((~ XINT (mode)) & 0777); |
| 2258 | |
| 2259 | return Qnil; |
| 2260 | } |
| 2261 | |
| 2262 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
| 2263 | "Return the default file protection for created files.\n\ |
| 2264 | The value is an integer.") |
| 2265 | () |
| 2266 | { |
| 2267 | int realmask; |
| 2268 | Lisp_Object value; |
| 2269 | |
| 2270 | realmask = umask (0); |
| 2271 | umask (realmask); |
| 2272 | |
| 2273 | XSET (value, Lisp_Int, (~ realmask) & 0777); |
| 2274 | return value; |
| 2275 | } |
| 2276 | |
| 2277 | #ifdef unix |
| 2278 | |
| 2279 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
| 2280 | "Tell Unix to finish all pending disk updates.") |
| 2281 | () |
| 2282 | { |
| 2283 | sync (); |
| 2284 | return Qnil; |
| 2285 | } |
| 2286 | |
| 2287 | #endif /* unix */ |
| 2288 | |
| 2289 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
| 2290 | "Return t if file FILE1 is newer than file FILE2.\n\ |
| 2291 | If FILE1 does not exist, the answer is nil;\n\ |
| 2292 | otherwise, if FILE2 does not exist, the answer is t.") |
| 2293 | (file1, file2) |
| 2294 | Lisp_Object file1, file2; |
| 2295 | { |
| 2296 | Lisp_Object abspath1, abspath2; |
| 2297 | struct stat st; |
| 2298 | int mtime1; |
| 2299 | Lisp_Object handler; |
| 2300 | struct gcpro gcpro1, gcpro2; |
| 2301 | |
| 2302 | CHECK_STRING (file1, 0); |
| 2303 | CHECK_STRING (file2, 0); |
| 2304 | |
| 2305 | abspath1 = Qnil; |
| 2306 | GCPRO2 (abspath1, file2); |
| 2307 | abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); |
| 2308 | abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); |
| 2309 | UNGCPRO; |
| 2310 | |
| 2311 | /* If the file name has special constructs in it, |
| 2312 | call the corresponding file handler. */ |
| 2313 | handler = Ffind_file_name_handler (abspath1); |
| 2314 | if (!NILP (handler)) |
| 2315 | return call3 (handler, Qfile_newer_than_file_p, abspath1, abspath2); |
| 2316 | |
| 2317 | if (stat (XSTRING (abspath1)->data, &st) < 0) |
| 2318 | return Qnil; |
| 2319 | |
| 2320 | mtime1 = st.st_mtime; |
| 2321 | |
| 2322 | if (stat (XSTRING (abspath2)->data, &st) < 0) |
| 2323 | return Qt; |
| 2324 | |
| 2325 | return (mtime1 > st.st_mtime) ? Qt : Qnil; |
| 2326 | } |
| 2327 | \f |
| 2328 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
| 2329 | 1, 2, 0, |
| 2330 | "Insert contents of file FILENAME after point.\n\ |
| 2331 | Returns list of absolute pathname and length of data inserted.\n\ |
| 2332 | If second argument VISIT is non-nil, the buffer's visited filename\n\ |
| 2333 | and last save file modtime are set, and it is marked unmodified.\n\ |
| 2334 | If visiting and the file does not exist, visiting is completed\n\ |
| 2335 | before the error is signaled.") |
| 2336 | (filename, visit) |
| 2337 | Lisp_Object filename, visit; |
| 2338 | { |
| 2339 | struct stat st; |
| 2340 | register int fd; |
| 2341 | register int inserted = 0; |
| 2342 | register int how_much; |
| 2343 | int count = specpdl_ptr - specpdl; |
| 2344 | struct gcpro gcpro1; |
| 2345 | Lisp_Object handler, val; |
| 2346 | |
| 2347 | val = Qnil; |
| 2348 | |
| 2349 | GCPRO1 (filename); |
| 2350 | if (!NILP (current_buffer->read_only)) |
| 2351 | Fbarf_if_buffer_read_only(); |
| 2352 | |
| 2353 | CHECK_STRING (filename, 0); |
| 2354 | filename = Fexpand_file_name (filename, Qnil); |
| 2355 | |
| 2356 | /* If the file name has special constructs in it, |
| 2357 | call the corresponding file handler. */ |
| 2358 | handler = Ffind_file_name_handler (filename); |
| 2359 | if (!NILP (handler)) |
| 2360 | { |
| 2361 | val = call3 (handler, Qinsert_file_contents, filename, visit); |
| 2362 | st.st_mtime = 0; |
| 2363 | goto handled; |
| 2364 | } |
| 2365 | |
| 2366 | fd = -1; |
| 2367 | |
| 2368 | #ifndef APOLLO |
| 2369 | if (stat (XSTRING (filename)->data, &st) < 0 |
| 2370 | || (fd = open (XSTRING (filename)->data, 0)) < 0) |
| 2371 | #else |
| 2372 | if ((fd = open (XSTRING (filename)->data, 0)) < 0 |
| 2373 | || fstat (fd, &st) < 0) |
| 2374 | #endif /* not APOLLO */ |
| 2375 | { |
| 2376 | if (fd >= 0) close (fd); |
| 2377 | if (NILP (visit)) |
| 2378 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2379 | st.st_mtime = -1; |
| 2380 | how_much = 0; |
| 2381 | goto notfound; |
| 2382 | } |
| 2383 | |
| 2384 | record_unwind_protect (close_file_unwind, make_number (fd)); |
| 2385 | |
| 2386 | #ifdef S_IFSOCK |
| 2387 | /* This code will need to be changed in order to work on named |
| 2388 | pipes, and it's probably just not worth it. So we should at |
| 2389 | least signal an error. */ |
| 2390 | if ((st.st_mode & S_IFMT) == S_IFSOCK) |
| 2391 | Fsignal (Qfile_error, |
| 2392 | Fcons (build_string ("reading from named pipe"), |
| 2393 | Fcons (filename, Qnil))); |
| 2394 | #endif |
| 2395 | |
| 2396 | /* Supposedly happens on VMS. */ |
| 2397 | if (st.st_size < 0) |
| 2398 | error ("File size is negative"); |
| 2399 | |
| 2400 | { |
| 2401 | register Lisp_Object temp; |
| 2402 | |
| 2403 | /* Make sure point-max won't overflow after this insertion. */ |
| 2404 | XSET (temp, Lisp_Int, st.st_size + Z); |
| 2405 | if (st.st_size + Z != XINT (temp)) |
| 2406 | error ("maximum buffer size exceeded"); |
| 2407 | } |
| 2408 | |
| 2409 | if (NILP (visit)) |
| 2410 | prepare_to_modify_buffer (point, point); |
| 2411 | |
| 2412 | move_gap (point); |
| 2413 | if (GAP_SIZE < st.st_size) |
| 2414 | make_gap (st.st_size - GAP_SIZE); |
| 2415 | |
| 2416 | while (1) |
| 2417 | { |
| 2418 | int try = min (st.st_size - inserted, 64 << 10); |
| 2419 | int this; |
| 2420 | |
| 2421 | /* Allow quitting out of the actual I/O. */ |
| 2422 | immediate_quit = 1; |
| 2423 | QUIT; |
| 2424 | this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try); |
| 2425 | immediate_quit = 0; |
| 2426 | |
| 2427 | if (this <= 0) |
| 2428 | { |
| 2429 | how_much = this; |
| 2430 | break; |
| 2431 | } |
| 2432 | |
| 2433 | GPT += this; |
| 2434 | GAP_SIZE -= this; |
| 2435 | ZV += this; |
| 2436 | Z += this; |
| 2437 | inserted += this; |
| 2438 | } |
| 2439 | |
| 2440 | if (inserted > 0) |
| 2441 | { |
| 2442 | record_insert (point, inserted); |
| 2443 | |
| 2444 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
| 2445 | offset_intervals (current_buffer, point, inserted); |
| 2446 | MODIFF++; |
| 2447 | } |
| 2448 | |
| 2449 | close (fd); |
| 2450 | |
| 2451 | /* Discard the unwind protect */ |
| 2452 | specpdl_ptr = specpdl + count; |
| 2453 | |
| 2454 | if (how_much < 0) |
| 2455 | error ("IO error reading %s: %s", |
| 2456 | XSTRING (filename)->data, err_str (errno)); |
| 2457 | |
| 2458 | notfound: |
| 2459 | handled: |
| 2460 | |
| 2461 | if (!NILP (visit)) |
| 2462 | { |
| 2463 | current_buffer->undo_list = Qnil; |
| 2464 | #ifdef APOLLO |
| 2465 | stat (XSTRING (filename)->data, &st); |
| 2466 | #endif |
| 2467 | current_buffer->modtime = st.st_mtime; |
| 2468 | current_buffer->save_modified = MODIFF; |
| 2469 | current_buffer->auto_save_modified = MODIFF; |
| 2470 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2471 | #ifdef CLASH_DETECTION |
| 2472 | if (NILP (handler)) |
| 2473 | { |
| 2474 | if (!NILP (current_buffer->filename)) |
| 2475 | unlock_file (current_buffer->filename); |
| 2476 | unlock_file (filename); |
| 2477 | } |
| 2478 | #endif /* CLASH_DETECTION */ |
| 2479 | current_buffer->filename = filename; |
| 2480 | /* If visiting nonexistent file, return nil. */ |
| 2481 | if (current_buffer->modtime == -1) |
| 2482 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2483 | } |
| 2484 | |
| 2485 | signal_after_change (point, 0, inserted); |
| 2486 | |
| 2487 | if (!NILP (val)) |
| 2488 | RETURN_UNGCPRO (val); |
| 2489 | RETURN_UNGCPRO (Fcons (filename, |
| 2490 | Fcons (make_number (inserted), |
| 2491 | Qnil))); |
| 2492 | } |
| 2493 | |
| 2494 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5, |
| 2495 | "r\nFWrite region to file: ", |
| 2496 | "Write current region into specified file.\n\ |
| 2497 | When called from a program, takes three arguments:\n\ |
| 2498 | START, END and FILENAME. START and END are buffer positions.\n\ |
| 2499 | Optional fourth argument APPEND if non-nil means\n\ |
| 2500 | append to existing file contents (if any).\n\ |
| 2501 | Optional fifth argument VISIT if t means\n\ |
| 2502 | set the last-save-file-modtime of buffer to this file's modtime\n\ |
| 2503 | and mark buffer not modified.\n\ |
| 2504 | If VISIT is a string, it is a second file name;\n\ |
| 2505 | the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\ |
| 2506 | VISIT is also the file name to lock and unlock for clash detection.\n\ |
| 2507 | If VISIT is neither t nor nil nor a string,\n\ |
| 2508 | that means do not print the \"Wrote file\" message.\n\ |
| 2509 | Kludgy feature: if START is a string, then that string is written\n\ |
| 2510 | to the file, instead of any buffer contents, and END is ignored.") |
| 2511 | (start, end, filename, append, visit) |
| 2512 | Lisp_Object start, end, filename, append, visit; |
| 2513 | { |
| 2514 | register int desc; |
| 2515 | int failure; |
| 2516 | int save_errno; |
| 2517 | unsigned char *fn; |
| 2518 | struct stat st; |
| 2519 | int tem; |
| 2520 | int count = specpdl_ptr - specpdl; |
| 2521 | #ifdef VMS |
| 2522 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ |
| 2523 | #endif /* VMS */ |
| 2524 | Lisp_Object handler; |
| 2525 | Lisp_Object visit_file; |
| 2526 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2527 | |
| 2528 | /* Special kludge to simplify auto-saving */ |
| 2529 | if (NILP (start)) |
| 2530 | { |
| 2531 | XFASTINT (start) = BEG; |
| 2532 | XFASTINT (end) = Z; |
| 2533 | } |
| 2534 | else if (XTYPE (start) != Lisp_String) |
| 2535 | validate_region (&start, &end); |
| 2536 | |
| 2537 | filename = Fexpand_file_name (filename, Qnil); |
| 2538 | if (XTYPE (visit) == Lisp_String) |
| 2539 | visit_file = Fexpand_file_name (visit, Qnil); |
| 2540 | else |
| 2541 | visit_file = filename; |
| 2542 | |
| 2543 | GCPRO4 (start, filename, visit, visit_file); |
| 2544 | |
| 2545 | /* If the file name has special constructs in it, |
| 2546 | call the corresponding file handler. */ |
| 2547 | handler = Ffind_file_name_handler (filename); |
| 2548 | |
| 2549 | if (!NILP (handler)) |
| 2550 | { |
| 2551 | Lisp_Object args[7]; |
| 2552 | Lisp_Object val; |
| 2553 | args[0] = handler; |
| 2554 | args[1] = Qwrite_region; |
| 2555 | args[2] = start; |
| 2556 | args[3] = end; |
| 2557 | args[4] = filename; |
| 2558 | args[5] = append; |
| 2559 | args[6] = visit; |
| 2560 | val = Ffuncall (7, args); |
| 2561 | |
| 2562 | /* Do this before reporting IO error |
| 2563 | to avoid a "file has changed on disk" warning on |
| 2564 | next attempt to save. */ |
| 2565 | if (EQ (visit, Qt) || XTYPE (visit) == Lisp_String) |
| 2566 | { |
| 2567 | current_buffer->modtime = 0; |
| 2568 | current_buffer->save_modified = MODIFF; |
| 2569 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2570 | current_buffer->filename = visit_file; |
| 2571 | } |
| 2572 | UNGCPRO; |
| 2573 | return val; |
| 2574 | } |
| 2575 | |
| 2576 | #ifdef CLASH_DETECTION |
| 2577 | if (!auto_saving) |
| 2578 | lock_file (visit_file); |
| 2579 | #endif /* CLASH_DETECTION */ |
| 2580 | |
| 2581 | fn = XSTRING (filename)->data; |
| 2582 | desc = -1; |
| 2583 | if (!NILP (append)) |
| 2584 | desc = open (fn, O_WRONLY); |
| 2585 | |
| 2586 | if (desc < 0) |
| 2587 | #ifdef VMS |
| 2588 | if (auto_saving) /* Overwrite any previous version of autosave file */ |
| 2589 | { |
| 2590 | vms_truncate (fn); /* if fn exists, truncate to zero length */ |
| 2591 | desc = open (fn, O_RDWR); |
| 2592 | if (desc < 0) |
| 2593 | desc = creat_copy_attrs (XTYPE (current_buffer->filename) == Lisp_String |
| 2594 | ? XSTRING (current_buffer->filename)->data : 0, |
| 2595 | fn); |
| 2596 | } |
| 2597 | else /* Write to temporary name and rename if no errors */ |
| 2598 | { |
| 2599 | Lisp_Object temp_name; |
| 2600 | temp_name = Ffile_name_directory (filename); |
| 2601 | |
| 2602 | if (!NILP (temp_name)) |
| 2603 | { |
| 2604 | temp_name = Fmake_temp_name (concat2 (temp_name, |
| 2605 | build_string ("$$SAVE$$"))); |
| 2606 | fname = XSTRING (filename)->data; |
| 2607 | fn = XSTRING (temp_name)->data; |
| 2608 | desc = creat_copy_attrs (fname, fn); |
| 2609 | if (desc < 0) |
| 2610 | { |
| 2611 | /* If we can't open the temporary file, try creating a new |
| 2612 | version of the original file. VMS "creat" creates a |
| 2613 | new version rather than truncating an existing file. */ |
| 2614 | fn = fname; |
| 2615 | fname = 0; |
| 2616 | desc = creat (fn, 0666); |
| 2617 | #if 0 /* This can clobber an existing file and fail to replace it, |
| 2618 | if the user runs out of space. */ |
| 2619 | if (desc < 0) |
| 2620 | { |
| 2621 | /* We can't make a new version; |
| 2622 | try to truncate and rewrite existing version if any. */ |
| 2623 | vms_truncate (fn); |
| 2624 | desc = open (fn, O_RDWR); |
| 2625 | } |
| 2626 | #endif |
| 2627 | } |
| 2628 | } |
| 2629 | else |
| 2630 | desc = creat (fn, 0666); |
| 2631 | } |
| 2632 | #else /* not VMS */ |
| 2633 | desc = creat (fn, auto_saving ? auto_save_mode_bits : 0666); |
| 2634 | #endif /* not VMS */ |
| 2635 | |
| 2636 | UNGCPRO; |
| 2637 | |
| 2638 | if (desc < 0) |
| 2639 | { |
| 2640 | #ifdef CLASH_DETECTION |
| 2641 | save_errno = errno; |
| 2642 | if (!auto_saving) unlock_file (visit_file); |
| 2643 | errno = save_errno; |
| 2644 | #endif /* CLASH_DETECTION */ |
| 2645 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
| 2646 | } |
| 2647 | |
| 2648 | record_unwind_protect (close_file_unwind, make_number (desc)); |
| 2649 | |
| 2650 | if (!NILP (append)) |
| 2651 | if (lseek (desc, 0, 2) < 0) |
| 2652 | { |
| 2653 | #ifdef CLASH_DETECTION |
| 2654 | if (!auto_saving) unlock_file (visit_file); |
| 2655 | #endif /* CLASH_DETECTION */ |
| 2656 | report_file_error ("Lseek error", Fcons (filename, Qnil)); |
| 2657 | } |
| 2658 | |
| 2659 | #ifdef VMS |
| 2660 | /* |
| 2661 | * Kludge Warning: The VMS C RTL likes to insert carriage returns |
| 2662 | * if we do writes that don't end with a carriage return. Furthermore |
| 2663 | * it cannot handle writes of more then 16K. The modified |
| 2664 | * version of "sys_write" in SYSDEP.C (see comment there) copes with |
| 2665 | * this EXCEPT for the last record (iff it doesn't end with a carriage |
| 2666 | * return). This implies that if your buffer doesn't end with a carriage |
| 2667 | * return, you get one free... tough. However it also means that if |
| 2668 | * we make two calls to sys_write (a la the following code) you can |
| 2669 | * get one at the gap as well. The easiest way to fix this (honest) |
| 2670 | * is to move the gap to the next newline (or the end of the buffer). |
| 2671 | * Thus this change. |
| 2672 | * |
| 2673 | * Yech! |
| 2674 | */ |
| 2675 | if (GPT > BEG && GPT_ADDR[-1] != '\n') |
| 2676 | move_gap (find_next_newline (GPT, 1)); |
| 2677 | #endif |
| 2678 | |
| 2679 | failure = 0; |
| 2680 | immediate_quit = 1; |
| 2681 | |
| 2682 | if (XTYPE (start) == Lisp_String) |
| 2683 | { |
| 2684 | failure = 0 > e_write (desc, XSTRING (start)->data, |
| 2685 | XSTRING (start)->size); |
| 2686 | save_errno = errno; |
| 2687 | } |
| 2688 | else if (XINT (start) != XINT (end)) |
| 2689 | { |
| 2690 | if (XINT (start) < GPT) |
| 2691 | { |
| 2692 | register int end1 = XINT (end); |
| 2693 | tem = XINT (start); |
| 2694 | failure = 0 > e_write (desc, &FETCH_CHAR (tem), |
| 2695 | min (GPT, end1) - tem); |
| 2696 | save_errno = errno; |
| 2697 | } |
| 2698 | |
| 2699 | if (XINT (end) > GPT && !failure) |
| 2700 | { |
| 2701 | tem = XINT (start); |
| 2702 | tem = max (tem, GPT); |
| 2703 | failure = 0 > e_write (desc, &FETCH_CHAR (tem), XINT (end) - tem); |
| 2704 | save_errno = errno; |
| 2705 | } |
| 2706 | } |
| 2707 | |
| 2708 | immediate_quit = 0; |
| 2709 | |
| 2710 | #ifdef HAVE_FSYNC |
| 2711 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
| 2712 | Disk full in NFS may be reported here. */ |
| 2713 | if (fsync (desc) < 0) |
| 2714 | failure = 1, save_errno = errno; |
| 2715 | #endif |
| 2716 | |
| 2717 | /* Spurious "file has changed on disk" warnings have been |
| 2718 | observed on Suns as well. |
| 2719 | It seems that `close' can change the modtime, under nfs. |
| 2720 | |
| 2721 | (This has supposedly been fixed in Sunos 4, |
| 2722 | but who knows about all the other machines with NFS?) */ |
| 2723 | #if 0 |
| 2724 | |
| 2725 | /* On VMS and APOLLO, must do the stat after the close |
| 2726 | since closing changes the modtime. */ |
| 2727 | #ifndef VMS |
| 2728 | #ifndef APOLLO |
| 2729 | /* Recall that #if defined does not work on VMS. */ |
| 2730 | #define FOO |
| 2731 | fstat (desc, &st); |
| 2732 | #endif |
| 2733 | #endif |
| 2734 | #endif |
| 2735 | |
| 2736 | /* NFS can report a write failure now. */ |
| 2737 | if (close (desc) < 0) |
| 2738 | failure = 1, save_errno = errno; |
| 2739 | |
| 2740 | #ifdef VMS |
| 2741 | /* If we wrote to a temporary name and had no errors, rename to real name. */ |
| 2742 | if (fname) |
| 2743 | { |
| 2744 | if (!failure) |
| 2745 | failure = (rename (fn, fname) != 0), save_errno = errno; |
| 2746 | fn = fname; |
| 2747 | } |
| 2748 | #endif /* VMS */ |
| 2749 | |
| 2750 | #ifndef FOO |
| 2751 | stat (fn, &st); |
| 2752 | #endif |
| 2753 | /* Discard the unwind protect */ |
| 2754 | specpdl_ptr = specpdl + count; |
| 2755 | |
| 2756 | #ifdef CLASH_DETECTION |
| 2757 | if (!auto_saving) |
| 2758 | unlock_file (visit_file); |
| 2759 | #endif /* CLASH_DETECTION */ |
| 2760 | |
| 2761 | /* Do this before reporting IO error |
| 2762 | to avoid a "file has changed on disk" warning on |
| 2763 | next attempt to save. */ |
| 2764 | if (EQ (visit, Qt) || XTYPE (visit) == Lisp_String) |
| 2765 | current_buffer->modtime = st.st_mtime; |
| 2766 | |
| 2767 | if (failure) |
| 2768 | error ("IO error writing %s: %s", fn, err_str (save_errno)); |
| 2769 | |
| 2770 | if (EQ (visit, Qt) || XTYPE (visit) == Lisp_String) |
| 2771 | { |
| 2772 | current_buffer->save_modified = MODIFF; |
| 2773 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2774 | current_buffer->filename = visit_file; |
| 2775 | } |
| 2776 | else if (!NILP (visit)) |
| 2777 | return Qnil; |
| 2778 | |
| 2779 | if (!auto_saving) |
| 2780 | message ("Wrote %s", XSTRING (visit_file)->data); |
| 2781 | |
| 2782 | return Qnil; |
| 2783 | } |
| 2784 | |
| 2785 | int |
| 2786 | e_write (desc, addr, len) |
| 2787 | int desc; |
| 2788 | register char *addr; |
| 2789 | register int len; |
| 2790 | { |
| 2791 | char buf[16 * 1024]; |
| 2792 | register char *p, *end; |
| 2793 | |
| 2794 | if (!EQ (current_buffer->selective_display, Qt)) |
| 2795 | return write (desc, addr, len) - len; |
| 2796 | else |
| 2797 | { |
| 2798 | p = buf; |
| 2799 | end = p + sizeof buf; |
| 2800 | while (len--) |
| 2801 | { |
| 2802 | if (p == end) |
| 2803 | { |
| 2804 | if (write (desc, buf, sizeof buf) != sizeof buf) |
| 2805 | return -1; |
| 2806 | p = buf; |
| 2807 | } |
| 2808 | *p = *addr++; |
| 2809 | if (*p++ == '\015') |
| 2810 | p[-1] = '\n'; |
| 2811 | } |
| 2812 | if (p != buf) |
| 2813 | if (write (desc, buf, p - buf) != p - buf) |
| 2814 | return -1; |
| 2815 | } |
| 2816 | return 0; |
| 2817 | } |
| 2818 | |
| 2819 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
| 2820 | Sverify_visited_file_modtime, 1, 1, 0, |
| 2821 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ |
| 2822 | This means that the file has not been changed since it was visited or saved.") |
| 2823 | (buf) |
| 2824 | Lisp_Object buf; |
| 2825 | { |
| 2826 | struct buffer *b; |
| 2827 | struct stat st; |
| 2828 | Lisp_Object handler; |
| 2829 | |
| 2830 | CHECK_BUFFER (buf, 0); |
| 2831 | b = XBUFFER (buf); |
| 2832 | |
| 2833 | if (XTYPE (b->filename) != Lisp_String) return Qt; |
| 2834 | if (b->modtime == 0) return Qt; |
| 2835 | |
| 2836 | /* If the file name has special constructs in it, |
| 2837 | call the corresponding file handler. */ |
| 2838 | handler = Ffind_file_name_handler (b->filename); |
| 2839 | if (!NILP (handler)) |
| 2840 | return call2 (handler, Qverify_visited_file_modtime, buf); |
| 2841 | |
| 2842 | if (stat (XSTRING (b->filename)->data, &st) < 0) |
| 2843 | { |
| 2844 | /* If the file doesn't exist now and didn't exist before, |
| 2845 | we say that it isn't modified, provided the error is a tame one. */ |
| 2846 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) |
| 2847 | st.st_mtime = -1; |
| 2848 | else |
| 2849 | st.st_mtime = 0; |
| 2850 | } |
| 2851 | if (st.st_mtime == b->modtime |
| 2852 | /* If both are positive, accept them if they are off by one second. */ |
| 2853 | || (st.st_mtime > 0 && b->modtime > 0 |
| 2854 | && (st.st_mtime == b->modtime + 1 |
| 2855 | || st.st_mtime == b->modtime - 1))) |
| 2856 | return Qt; |
| 2857 | return Qnil; |
| 2858 | } |
| 2859 | |
| 2860 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, |
| 2861 | Sclear_visited_file_modtime, 0, 0, 0, |
| 2862 | "Clear out records of last mod time of visited file.\n\ |
| 2863 | Next attempt to save will certainly not complain of a discrepancy.") |
| 2864 | () |
| 2865 | { |
| 2866 | current_buffer->modtime = 0; |
| 2867 | return Qnil; |
| 2868 | } |
| 2869 | |
| 2870 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
| 2871 | Svisited_file_modtime, 0, 0, 0, |
| 2872 | "Return the current buffer's recorded visited file modification time.\n\ |
| 2873 | The value is a list of the form (HIGH . LOW), like the time values\n\ |
| 2874 | that `file-attributes' returns.") |
| 2875 | () |
| 2876 | { |
| 2877 | return long_to_cons (current_buffer->modtime); |
| 2878 | } |
| 2879 | |
| 2880 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
| 2881 | Sset_visited_file_modtime, 0, 1, 0, |
| 2882 | "Update buffer's recorded modification time from the visited file's time.\n\ |
| 2883 | Useful if the buffer was not read from the file normally\n\ |
| 2884 | or if the file itself has been changed for some known benign reason.\n\ |
| 2885 | An argument specifies the modification time value to use\n\ |
| 2886 | \(instead of that of the visited file), in the form of a list\n\ |
| 2887 | \(HIGH . LOW) or (HIGH LOW).") |
| 2888 | (time_list) |
| 2889 | Lisp_Object time_list; |
| 2890 | { |
| 2891 | if (!NILP (time_list)) |
| 2892 | current_buffer->modtime = cons_to_long (time_list); |
| 2893 | else |
| 2894 | { |
| 2895 | register Lisp_Object filename; |
| 2896 | struct stat st; |
| 2897 | Lisp_Object handler; |
| 2898 | |
| 2899 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
| 2900 | |
| 2901 | /* If the file name has special constructs in it, |
| 2902 | call the corresponding file handler. */ |
| 2903 | handler = Ffind_file_name_handler (filename); |
| 2904 | if (!NILP (handler)) |
| 2905 | return call3 (handler, Qfile_name_directory, filename, Qnil); |
| 2906 | else if (stat (XSTRING (filename)->data, &st) >= 0) |
| 2907 | current_buffer->modtime = st.st_mtime; |
| 2908 | } |
| 2909 | |
| 2910 | return Qnil; |
| 2911 | } |
| 2912 | \f |
| 2913 | Lisp_Object |
| 2914 | auto_save_error () |
| 2915 | { |
| 2916 | unsigned char *name = XSTRING (current_buffer->name)->data; |
| 2917 | |
| 2918 | ring_bell (); |
| 2919 | message ("Autosaving...error for %s", name); |
| 2920 | Fsleep_for (make_number (1), Qnil); |
| 2921 | message ("Autosaving...error!for %s", name); |
| 2922 | Fsleep_for (make_number (1), Qnil); |
| 2923 | message ("Autosaving...error for %s", name); |
| 2924 | Fsleep_for (make_number (1), Qnil); |
| 2925 | return Qnil; |
| 2926 | } |
| 2927 | |
| 2928 | Lisp_Object |
| 2929 | auto_save_1 () |
| 2930 | { |
| 2931 | unsigned char *fn; |
| 2932 | struct stat st; |
| 2933 | |
| 2934 | /* Get visited file's mode to become the auto save file's mode. */ |
| 2935 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) |
| 2936 | /* But make sure we can overwrite it later! */ |
| 2937 | auto_save_mode_bits = st.st_mode | 0600; |
| 2938 | else |
| 2939 | auto_save_mode_bits = 0666; |
| 2940 | |
| 2941 | return |
| 2942 | Fwrite_region (Qnil, Qnil, |
| 2943 | current_buffer->auto_save_file_name, |
| 2944 | Qnil, Qlambda); |
| 2945 | } |
| 2946 | |
| 2947 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
| 2948 | "Auto-save all buffers that need it.\n\ |
| 2949 | This is all buffers that have auto-saving enabled\n\ |
| 2950 | and are changed since last auto-saved.\n\ |
| 2951 | Auto-saving writes the buffer into a file\n\ |
| 2952 | so that your editing is not lost if the system crashes.\n\ |
| 2953 | This file is not the file you visited; that changes only when you save.\n\n\ |
| 2954 | Non-nil first argument means do not print any message if successful.\n\ |
| 2955 | Non-nil second argument means save only current buffer.") |
| 2956 | (no_message, current_only) |
| 2957 | Lisp_Object no_message, current_only; |
| 2958 | { |
| 2959 | struct buffer *old = current_buffer, *b; |
| 2960 | Lisp_Object tail, buf; |
| 2961 | int auto_saved = 0; |
| 2962 | char *omessage = echo_area_glyphs; |
| 2963 | extern int minibuf_level; |
| 2964 | int do_handled_files; |
| 2965 | |
| 2966 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables |
| 2967 | point to non-strings reached from Vbuffer_alist. */ |
| 2968 | |
| 2969 | auto_saving = 1; |
| 2970 | if (minibuf_level) |
| 2971 | no_message = Qt; |
| 2972 | |
| 2973 | /* Vrun_hooks is nil before emacs is dumped, and inc-vers.el will |
| 2974 | eventually call do-auto-save, so don't err here in that case. */ |
| 2975 | if (!NILP (Vrun_hooks)) |
| 2976 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
| 2977 | |
| 2978 | /* First, save all files which don't have handlers. If Emacs is |
| 2979 | crashing, the handlers may tweak what is causing Emacs to crash |
| 2980 | in the first place, and it would be a shame if Emacs failed to |
| 2981 | autosave perfectly ordinary files because it couldn't handle some |
| 2982 | ange-ftp'd file. */ |
| 2983 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
| 2984 | for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons; |
| 2985 | tail = XCONS (tail)->cdr) |
| 2986 | { |
| 2987 | buf = XCONS (XCONS (tail)->car)->cdr; |
| 2988 | b = XBUFFER (buf); |
| 2989 | |
| 2990 | if (!NILP (current_only) |
| 2991 | && b != current_buffer) |
| 2992 | continue; |
| 2993 | |
| 2994 | /* Check for auto save enabled |
| 2995 | and file changed since last auto save |
| 2996 | and file changed since last real save. */ |
| 2997 | if (XTYPE (b->auto_save_file_name) == Lisp_String |
| 2998 | && b->save_modified < BUF_MODIFF (b) |
| 2999 | && b->auto_save_modified < BUF_MODIFF (b) |
| 3000 | && (do_handled_files |
| 3001 | || NILP (Ffind_file_name_handler (b->auto_save_file_name)))) |
| 3002 | { |
| 3003 | if ((XFASTINT (b->save_length) * 10 |
| 3004 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
| 3005 | /* A short file is likely to change a large fraction; |
| 3006 | spare the user annoying messages. */ |
| 3007 | && XFASTINT (b->save_length) > 5000 |
| 3008 | /* These messages are frequent and annoying for `*mail*'. */ |
| 3009 | && !EQ (b->filename, Qnil) |
| 3010 | && NILP (no_message)) |
| 3011 | { |
| 3012 | /* It has shrunk too much; turn off auto-saving here. */ |
| 3013 | message ("Buffer %s has shrunk a lot; auto save turned off there", |
| 3014 | XSTRING (b->name)->data); |
| 3015 | /* User can reenable saving with M-x auto-save. */ |
| 3016 | b->auto_save_file_name = Qnil; |
| 3017 | /* Prevent warning from repeating if user does so. */ |
| 3018 | XFASTINT (b->save_length) = 0; |
| 3019 | Fsleep_for (make_number (1), Qnil); |
| 3020 | continue; |
| 3021 | } |
| 3022 | set_buffer_internal (b); |
| 3023 | if (!auto_saved && NILP (no_message)) |
| 3024 | message1 ("Auto-saving..."); |
| 3025 | internal_condition_case (auto_save_1, Qt, auto_save_error); |
| 3026 | auto_saved++; |
| 3027 | b->auto_save_modified = BUF_MODIFF (b); |
| 3028 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3029 | set_buffer_internal (old); |
| 3030 | } |
| 3031 | } |
| 3032 | |
| 3033 | /* Prevent another auto save till enough input events come in. */ |
| 3034 | record_auto_save (); |
| 3035 | |
| 3036 | if (auto_saved && NILP (no_message)) |
| 3037 | message1 (omessage ? omessage : "Auto-saving...done"); |
| 3038 | |
| 3039 | auto_saving = 0; |
| 3040 | return Qnil; |
| 3041 | } |
| 3042 | |
| 3043 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, |
| 3044 | Sset_buffer_auto_saved, 0, 0, 0, |
| 3045 | "Mark current buffer as auto-saved with its current text.\n\ |
| 3046 | No auto-save file will be written until the buffer changes again.") |
| 3047 | () |
| 3048 | { |
| 3049 | current_buffer->auto_save_modified = MODIFF; |
| 3050 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3051 | return Qnil; |
| 3052 | } |
| 3053 | |
| 3054 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, |
| 3055 | 0, 0, 0, |
| 3056 | "Return t if buffer has been auto-saved since last read in or saved.") |
| 3057 | () |
| 3058 | { |
| 3059 | return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil; |
| 3060 | } |
| 3061 | \f |
| 3062 | /* Reading and completing file names */ |
| 3063 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); |
| 3064 | |
| 3065 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, |
| 3066 | 3, 3, 0, |
| 3067 | "Internal subroutine for read-file-name. Do not call this.") |
| 3068 | (string, dir, action) |
| 3069 | Lisp_Object string, dir, action; |
| 3070 | /* action is nil for complete, t for return list of completions, |
| 3071 | lambda for verify final value */ |
| 3072 | { |
| 3073 | Lisp_Object name, specdir, realdir, val, orig_string; |
| 3074 | int changed; |
| 3075 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3076 | |
| 3077 | realdir = dir; |
| 3078 | name = string; |
| 3079 | orig_string = Qnil; |
| 3080 | specdir = Qnil; |
| 3081 | changed = 0; |
| 3082 | /* No need to protect ACTION--we only compare it with t and nil. */ |
| 3083 | GCPRO4 (string, realdir, name, specdir); |
| 3084 | |
| 3085 | if (XSTRING (string)->size == 0) |
| 3086 | { |
| 3087 | if (EQ (action, Qlambda)) |
| 3088 | { |
| 3089 | UNGCPRO; |
| 3090 | return Qnil; |
| 3091 | } |
| 3092 | } |
| 3093 | else |
| 3094 | { |
| 3095 | orig_string = string; |
| 3096 | string = Fsubstitute_in_file_name (string); |
| 3097 | changed = NILP (Fstring_equal (string, orig_string)); |
| 3098 | name = Ffile_name_nondirectory (string); |
| 3099 | val = Ffile_name_directory (string); |
| 3100 | if (! NILP (val)) |
| 3101 | realdir = Fexpand_file_name (val, realdir); |
| 3102 | } |
| 3103 | |
| 3104 | if (NILP (action)) |
| 3105 | { |
| 3106 | specdir = Ffile_name_directory (string); |
| 3107 | val = Ffile_name_completion (name, realdir); |
| 3108 | UNGCPRO; |
| 3109 | if (XTYPE (val) != Lisp_String) |
| 3110 | { |
| 3111 | if (changed) |
| 3112 | return string; |
| 3113 | return val; |
| 3114 | } |
| 3115 | |
| 3116 | if (!NILP (specdir)) |
| 3117 | val = concat2 (specdir, val); |
| 3118 | #ifndef VMS |
| 3119 | { |
| 3120 | register unsigned char *old, *new; |
| 3121 | register int n; |
| 3122 | int osize, count; |
| 3123 | |
| 3124 | osize = XSTRING (val)->size; |
| 3125 | /* Quote "$" as "$$" to get it past substitute-in-file-name */ |
| 3126 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) |
| 3127 | if (*old++ == '$') count++; |
| 3128 | if (count > 0) |
| 3129 | { |
| 3130 | old = XSTRING (val)->data; |
| 3131 | val = Fmake_string (make_number (osize + count), make_number (0)); |
| 3132 | new = XSTRING (val)->data; |
| 3133 | for (n = osize; n > 0; n--) |
| 3134 | if (*old != '$') |
| 3135 | *new++ = *old++; |
| 3136 | else |
| 3137 | { |
| 3138 | *new++ = '$'; |
| 3139 | *new++ = '$'; |
| 3140 | old++; |
| 3141 | } |
| 3142 | } |
| 3143 | } |
| 3144 | #endif /* Not VMS */ |
| 3145 | return val; |
| 3146 | } |
| 3147 | UNGCPRO; |
| 3148 | |
| 3149 | if (EQ (action, Qt)) |
| 3150 | return Ffile_name_all_completions (name, realdir); |
| 3151 | /* Only other case actually used is ACTION = lambda */ |
| 3152 | #ifdef VMS |
| 3153 | /* Supposedly this helps commands such as `cd' that read directory names, |
| 3154 | but can someone explain how it helps them? -- RMS */ |
| 3155 | if (XSTRING (name)->size == 0) |
| 3156 | return Qt; |
| 3157 | #endif /* VMS */ |
| 3158 | return Ffile_exists_p (string); |
| 3159 | } |
| 3160 | |
| 3161 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3162 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ |
| 3163 | Value is not expanded---you must call `expand-file-name' yourself.\n\ |
| 3164 | Default name to DEFAULT if user enters a null string.\n\ |
| 3165 | (If DEFAULT is omitted, the visited file name is used.)\n\ |
| 3166 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
| 3167 | Non-nil and non-t means also require confirmation after completion.\n\ |
| 3168 | Fifth arg INITIAL specifies text to start with.\n\ |
| 3169 | DIR defaults to current buffer's directory default.") |
| 3170 | (prompt, dir, defalt, mustmatch, initial) |
| 3171 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3172 | { |
| 3173 | Lisp_Object val, insdef, insdef1, tem; |
| 3174 | struct gcpro gcpro1, gcpro2; |
| 3175 | register char *homedir; |
| 3176 | int count; |
| 3177 | |
| 3178 | if (NILP (dir)) |
| 3179 | dir = current_buffer->directory; |
| 3180 | if (NILP (defalt)) |
| 3181 | defalt = current_buffer->filename; |
| 3182 | |
| 3183 | /* If dir starts with user's homedir, change that to ~. */ |
| 3184 | homedir = (char *) egetenv ("HOME"); |
| 3185 | if (homedir != 0 |
| 3186 | && XTYPE (dir) == Lisp_String |
| 3187 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3188 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3189 | { |
| 3190 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3191 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3192 | XSTRING (dir)->data[0] = '~'; |
| 3193 | } |
| 3194 | |
| 3195 | if (insert_default_directory) |
| 3196 | { |
| 3197 | insdef = dir; |
| 3198 | insdef1 = dir; |
| 3199 | if (!NILP (initial)) |
| 3200 | { |
| 3201 | Lisp_Object args[2], pos; |
| 3202 | |
| 3203 | args[0] = insdef; |
| 3204 | args[1] = initial; |
| 3205 | insdef = Fconcat (2, args); |
| 3206 | pos = make_number (XSTRING (dir)->size); |
| 3207 | insdef1 = Fcons (insdef, pos); |
| 3208 | } |
| 3209 | } |
| 3210 | else |
| 3211 | insdef = Qnil, insdef1 = Qnil; |
| 3212 | |
| 3213 | #ifdef VMS |
| 3214 | count = specpdl_ptr - specpdl; |
| 3215 | specbind (intern ("completion-ignore-case"), Qt); |
| 3216 | #endif |
| 3217 | |
| 3218 | GCPRO2 (insdef, defalt); |
| 3219 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3220 | dir, mustmatch, insdef1, |
| 3221 | Qfile_name_history); |
| 3222 | |
| 3223 | #ifdef VMS |
| 3224 | unbind_to (count, Qnil); |
| 3225 | #endif |
| 3226 | |
| 3227 | UNGCPRO; |
| 3228 | if (NILP (val)) |
| 3229 | error ("No file name specified"); |
| 3230 | tem = Fstring_equal (val, insdef); |
| 3231 | if (!NILP (tem) && !NILP (defalt)) |
| 3232 | return defalt; |
| 3233 | return Fsubstitute_in_file_name (val); |
| 3234 | } |
| 3235 | |
| 3236 | #if 0 /* Old version */ |
| 3237 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3238 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ |
| 3239 | Value is not expanded---you must call `expand-file-name' yourself.\n\ |
| 3240 | Default name to DEFAULT if user enters a null string.\n\ |
| 3241 | (If DEFAULT is omitted, the visited file name is used.)\n\ |
| 3242 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
| 3243 | Non-nil and non-t means also require confirmation after completion.\n\ |
| 3244 | Fifth arg INITIAL specifies text to start with.\n\ |
| 3245 | DIR defaults to current buffer's directory default.") |
| 3246 | (prompt, dir, defalt, mustmatch, initial) |
| 3247 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3248 | { |
| 3249 | Lisp_Object val, insdef, tem; |
| 3250 | struct gcpro gcpro1, gcpro2; |
| 3251 | register char *homedir; |
| 3252 | int count; |
| 3253 | |
| 3254 | if (NILP (dir)) |
| 3255 | dir = current_buffer->directory; |
| 3256 | if (NILP (defalt)) |
| 3257 | defalt = current_buffer->filename; |
| 3258 | |
| 3259 | /* If dir starts with user's homedir, change that to ~. */ |
| 3260 | homedir = (char *) egetenv ("HOME"); |
| 3261 | if (homedir != 0 |
| 3262 | && XTYPE (dir) == Lisp_String |
| 3263 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3264 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3265 | { |
| 3266 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3267 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3268 | XSTRING (dir)->data[0] = '~'; |
| 3269 | } |
| 3270 | |
| 3271 | if (!NILP (initial)) |
| 3272 | insdef = initial; |
| 3273 | else if (insert_default_directory) |
| 3274 | insdef = dir; |
| 3275 | else |
| 3276 | insdef = build_string (""); |
| 3277 | |
| 3278 | #ifdef VMS |
| 3279 | count = specpdl_ptr - specpdl; |
| 3280 | specbind (intern ("completion-ignore-case"), Qt); |
| 3281 | #endif |
| 3282 | |
| 3283 | GCPRO2 (insdef, defalt); |
| 3284 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3285 | dir, mustmatch, |
| 3286 | insert_default_directory ? insdef : Qnil, |
| 3287 | Qfile_name_history); |
| 3288 | |
| 3289 | #ifdef VMS |
| 3290 | unbind_to (count, Qnil); |
| 3291 | #endif |
| 3292 | |
| 3293 | UNGCPRO; |
| 3294 | if (NILP (val)) |
| 3295 | error ("No file name specified"); |
| 3296 | tem = Fstring_equal (val, insdef); |
| 3297 | if (!NILP (tem) && !NILP (defalt)) |
| 3298 | return defalt; |
| 3299 | return Fsubstitute_in_file_name (val); |
| 3300 | } |
| 3301 | #endif /* Old version */ |
| 3302 | \f |
| 3303 | syms_of_fileio () |
| 3304 | { |
| 3305 | Qexpand_file_name = intern ("expand-file-name"); |
| 3306 | Qdirectory_file_name = intern ("directory-file-name"); |
| 3307 | Qfile_name_directory = intern ("file-name-directory"); |
| 3308 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); |
| 3309 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
| 3310 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
| 3311 | Qcopy_file = intern ("copy-file"); |
| 3312 | Qmake_directory = intern ("make-directory"); |
| 3313 | Qdelete_directory = intern ("delete-directory"); |
| 3314 | Qdelete_file = intern ("delete-file"); |
| 3315 | Qrename_file = intern ("rename-file"); |
| 3316 | Qadd_name_to_file = intern ("add-name-to-file"); |
| 3317 | Qmake_symbolic_link = intern ("make-symbolic-link"); |
| 3318 | Qfile_exists_p = intern ("file-exists-p"); |
| 3319 | Qfile_executable_p = intern ("file-executable-p"); |
| 3320 | Qfile_readable_p = intern ("file-readable-p"); |
| 3321 | Qfile_symlink_p = intern ("file-symlink-p"); |
| 3322 | Qfile_writable_p = intern ("file-writable-p"); |
| 3323 | Qfile_directory_p = intern ("file-directory-p"); |
| 3324 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
| 3325 | Qfile_modes = intern ("file-modes"); |
| 3326 | Qset_file_modes = intern ("set-file-modes"); |
| 3327 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); |
| 3328 | Qinsert_file_contents = intern ("insert-file-contents"); |
| 3329 | Qwrite_region = intern ("write-region"); |
| 3330 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); |
| 3331 | |
| 3332 | staticpro (&Qexpand_file_name); |
| 3333 | staticpro (&Qdirectory_file_name); |
| 3334 | staticpro (&Qfile_name_directory); |
| 3335 | staticpro (&Qfile_name_nondirectory); |
| 3336 | staticpro (&Qunhandled_file_name_directory); |
| 3337 | staticpro (&Qfile_name_as_directory); |
| 3338 | staticpro (&Qcopy_file); |
| 3339 | staticpro (&Qmake_directory); |
| 3340 | staticpro (&Qdelete_directory); |
| 3341 | staticpro (&Qdelete_file); |
| 3342 | staticpro (&Qrename_file); |
| 3343 | staticpro (&Qadd_name_to_file); |
| 3344 | staticpro (&Qmake_symbolic_link); |
| 3345 | staticpro (&Qfile_exists_p); |
| 3346 | staticpro (&Qfile_executable_p); |
| 3347 | staticpro (&Qfile_readable_p); |
| 3348 | staticpro (&Qfile_symlink_p); |
| 3349 | staticpro (&Qfile_writable_p); |
| 3350 | staticpro (&Qfile_directory_p); |
| 3351 | staticpro (&Qfile_accessible_directory_p); |
| 3352 | staticpro (&Qfile_modes); |
| 3353 | staticpro (&Qset_file_modes); |
| 3354 | staticpro (&Qfile_newer_than_file_p); |
| 3355 | staticpro (&Qinsert_file_contents); |
| 3356 | staticpro (&Qwrite_region); |
| 3357 | staticpro (&Qverify_visited_file_modtime); |
| 3358 | |
| 3359 | Qfile_name_history = intern ("file-name-history"); |
| 3360 | Fset (Qfile_name_history, Qnil); |
| 3361 | staticpro (&Qfile_name_history); |
| 3362 | |
| 3363 | Qfile_error = intern ("file-error"); |
| 3364 | staticpro (&Qfile_error); |
| 3365 | Qfile_already_exists = intern("file-already-exists"); |
| 3366 | staticpro (&Qfile_already_exists); |
| 3367 | |
| 3368 | Fput (Qfile_error, Qerror_conditions, |
| 3369 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); |
| 3370 | Fput (Qfile_error, Qerror_message, |
| 3371 | build_string ("File error")); |
| 3372 | |
| 3373 | Fput (Qfile_already_exists, Qerror_conditions, |
| 3374 | Fcons (Qfile_already_exists, |
| 3375 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); |
| 3376 | Fput (Qfile_already_exists, Qerror_message, |
| 3377 | build_string ("File already exists")); |
| 3378 | |
| 3379 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, |
| 3380 | "*Non-nil means when reading a filename start with default dir in minibuffer."); |
| 3381 | insert_default_directory = 1; |
| 3382 | |
| 3383 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, |
| 3384 | "*Non-nil means write new files with record format `stmlf'.\n\ |
| 3385 | nil means use format `var'. This variable is meaningful only on VMS."); |
| 3386 | vms_stmlf_recfm = 0; |
| 3387 | |
| 3388 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
| 3389 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ |
| 3390 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ |
| 3391 | HANDLER.\n\ |
| 3392 | \n\ |
| 3393 | The first argument given to HANDLER is the name of the I/O primitive\n\ |
| 3394 | to be handled; the remaining arguments are the arguments that were\n\ |
| 3395 | passed to that primitive. For example, if you do\n\ |
| 3396 | (file-exists-p FILENAME)\n\ |
| 3397 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ |
| 3398 | (funcall HANDLER 'file-exists-p FILENAME)\n\ |
| 3399 | The function `find-file-name-handler' checks this list for a handler\n\ |
| 3400 | for its argument."); |
| 3401 | Vfile_name_handler_alist = Qnil; |
| 3402 | |
| 3403 | defsubr (&Sfind_file_name_handler); |
| 3404 | defsubr (&Sfile_name_directory); |
| 3405 | defsubr (&Sfile_name_nondirectory); |
| 3406 | defsubr (&Sunhandled_file_name_directory); |
| 3407 | defsubr (&Sfile_name_as_directory); |
| 3408 | defsubr (&Sdirectory_file_name); |
| 3409 | defsubr (&Smake_temp_name); |
| 3410 | defsubr (&Sexpand_file_name); |
| 3411 | defsubr (&Ssubstitute_in_file_name); |
| 3412 | defsubr (&Scopy_file); |
| 3413 | defsubr (&Smake_directory_internal); |
| 3414 | defsubr (&Sdelete_directory); |
| 3415 | defsubr (&Sdelete_file); |
| 3416 | defsubr (&Srename_file); |
| 3417 | defsubr (&Sadd_name_to_file); |
| 3418 | #ifdef S_IFLNK |
| 3419 | defsubr (&Smake_symbolic_link); |
| 3420 | #endif /* S_IFLNK */ |
| 3421 | #ifdef VMS |
| 3422 | defsubr (&Sdefine_logical_name); |
| 3423 | #endif /* VMS */ |
| 3424 | #ifdef HPUX_NET |
| 3425 | defsubr (&Ssysnetunam); |
| 3426 | #endif /* HPUX_NET */ |
| 3427 | defsubr (&Sfile_name_absolute_p); |
| 3428 | defsubr (&Sfile_exists_p); |
| 3429 | defsubr (&Sfile_executable_p); |
| 3430 | defsubr (&Sfile_readable_p); |
| 3431 | defsubr (&Sfile_writable_p); |
| 3432 | defsubr (&Sfile_symlink_p); |
| 3433 | defsubr (&Sfile_directory_p); |
| 3434 | defsubr (&Sfile_accessible_directory_p); |
| 3435 | defsubr (&Sfile_modes); |
| 3436 | defsubr (&Sset_file_modes); |
| 3437 | defsubr (&Sset_default_file_modes); |
| 3438 | defsubr (&Sdefault_file_modes); |
| 3439 | defsubr (&Sfile_newer_than_file_p); |
| 3440 | defsubr (&Sinsert_file_contents); |
| 3441 | defsubr (&Swrite_region); |
| 3442 | defsubr (&Sverify_visited_file_modtime); |
| 3443 | defsubr (&Sclear_visited_file_modtime); |
| 3444 | defsubr (&Svisited_file_modtime); |
| 3445 | defsubr (&Sset_visited_file_modtime); |
| 3446 | defsubr (&Sdo_auto_save); |
| 3447 | defsubr (&Sset_buffer_auto_saved); |
| 3448 | defsubr (&Srecent_auto_save_p); |
| 3449 | |
| 3450 | defsubr (&Sread_file_name_internal); |
| 3451 | defsubr (&Sread_file_name); |
| 3452 | |
| 3453 | #ifdef unix |
| 3454 | defsubr (&Sunix_sync); |
| 3455 | #endif |
| 3456 | } |