| 1 | /* File IO for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994 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 HAVE_UNISTD_H |
| 26 | #include <unistd.h> |
| 27 | #endif |
| 28 | |
| 29 | #if !defined (S_ISLNK) && defined (S_IFLNK) |
| 30 | # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) |
| 31 | #endif |
| 32 | |
| 33 | #if !defined (S_ISREG) && defined (S_IFREG) |
| 34 | # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) |
| 35 | #endif |
| 36 | |
| 37 | #ifdef VMS |
| 38 | #include "vms-pwd.h" |
| 39 | #else |
| 40 | #include <pwd.h> |
| 41 | #endif |
| 42 | |
| 43 | #ifdef MSDOS |
| 44 | #include "msdos.h" |
| 45 | #include <sys/param.h> |
| 46 | #endif |
| 47 | |
| 48 | #include <ctype.h> |
| 49 | |
| 50 | #ifdef VMS |
| 51 | #include "vmsdir.h" |
| 52 | #include <perror.h> |
| 53 | #include <stddef.h> |
| 54 | #include <string.h> |
| 55 | #endif |
| 56 | |
| 57 | #include <errno.h> |
| 58 | |
| 59 | #ifndef vax11c |
| 60 | extern int errno; |
| 61 | #endif |
| 62 | |
| 63 | extern char *strerror (); |
| 64 | |
| 65 | #ifdef APOLLO |
| 66 | #include <sys/time.h> |
| 67 | #endif |
| 68 | |
| 69 | #ifndef USG |
| 70 | #ifndef VMS |
| 71 | #ifndef BSD4_1 |
| 72 | #define HAVE_FSYNC |
| 73 | #endif |
| 74 | #endif |
| 75 | #endif |
| 76 | |
| 77 | #include "lisp.h" |
| 78 | #include "intervals.h" |
| 79 | #include "buffer.h" |
| 80 | #include "window.h" |
| 81 | |
| 82 | #ifdef VMS |
| 83 | #include <file.h> |
| 84 | #include <rmsdef.h> |
| 85 | #include <fab.h> |
| 86 | #include <nam.h> |
| 87 | #endif |
| 88 | |
| 89 | #include "systime.h" |
| 90 | |
| 91 | #ifdef HPUX |
| 92 | #include <netio.h> |
| 93 | #ifndef HPUX8 |
| 94 | #ifndef HPUX9 |
| 95 | #include <errnet.h> |
| 96 | #endif |
| 97 | #endif |
| 98 | #endif |
| 99 | |
| 100 | #ifndef O_WRONLY |
| 101 | #define O_WRONLY 1 |
| 102 | #endif |
| 103 | |
| 104 | #define min(a, b) ((a) < (b) ? (a) : (b)) |
| 105 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 106 | |
| 107 | /* Nonzero during writing of auto-save files */ |
| 108 | int auto_saving; |
| 109 | |
| 110 | /* Set by auto_save_1 to mode of original file so Fwrite_region will create |
| 111 | a new file with the same mode as the original */ |
| 112 | int auto_save_mode_bits; |
| 113 | |
| 114 | /* Alist of elements (REGEXP . HANDLER) for file names |
| 115 | whose I/O is done with a special handler. */ |
| 116 | Lisp_Object Vfile_name_handler_alist; |
| 117 | |
| 118 | /* Functions to be called to process text properties in inserted file. */ |
| 119 | Lisp_Object Vafter_insert_file_functions; |
| 120 | |
| 121 | /* Functions to be called to create text property annotations for file. */ |
| 122 | Lisp_Object Vwrite_region_annotate_functions; |
| 123 | |
| 124 | /* File name in which we write a list of all our auto save files. */ |
| 125 | Lisp_Object Vauto_save_list_file_name; |
| 126 | |
| 127 | /* Nonzero means, when reading a filename in the minibuffer, |
| 128 | start out by inserting the default directory into the minibuffer. */ |
| 129 | int insert_default_directory; |
| 130 | |
| 131 | /* On VMS, nonzero means write new files with record format stmlf. |
| 132 | Zero means use var format. */ |
| 133 | int vms_stmlf_recfm; |
| 134 | |
| 135 | /* These variables describe handlers that have "already" had a chance |
| 136 | to handle the current operation. |
| 137 | |
| 138 | Vinhibit_file_name_handlers is a list of file name handlers. |
| 139 | Vinhibit_file_name_operation is the operation being handled. |
| 140 | If we try to handle that operation, we ignore those handlers. */ |
| 141 | |
| 142 | static Lisp_Object Vinhibit_file_name_handlers; |
| 143 | static Lisp_Object Vinhibit_file_name_operation; |
| 144 | |
| 145 | Lisp_Object Qfile_error, Qfile_already_exists; |
| 146 | |
| 147 | Lisp_Object Qfile_name_history; |
| 148 | |
| 149 | Lisp_Object Qcar_less_than_car; |
| 150 | |
| 151 | report_file_error (string, data) |
| 152 | char *string; |
| 153 | Lisp_Object data; |
| 154 | { |
| 155 | Lisp_Object errstring; |
| 156 | |
| 157 | errstring = build_string (strerror (errno)); |
| 158 | |
| 159 | /* System error messages are capitalized. Downcase the initial |
| 160 | unless it is followed by a slash. */ |
| 161 | if (XSTRING (errstring)->data[1] != '/') |
| 162 | XSTRING (errstring)->data[0] = DOWNCASE (XSTRING (errstring)->data[0]); |
| 163 | |
| 164 | while (1) |
| 165 | Fsignal (Qfile_error, |
| 166 | Fcons (build_string (string), Fcons (errstring, data))); |
| 167 | } |
| 168 | |
| 169 | close_file_unwind (fd) |
| 170 | Lisp_Object fd; |
| 171 | { |
| 172 | close (XFASTINT (fd)); |
| 173 | } |
| 174 | |
| 175 | /* Restore point, having saved it as a marker. */ |
| 176 | |
| 177 | restore_point_unwind (location) |
| 178 | Lisp_Object location; |
| 179 | { |
| 180 | SET_PT (marker_position (location)); |
| 181 | Fset_marker (location, Qnil, Qnil); |
| 182 | } |
| 183 | \f |
| 184 | Lisp_Object Qexpand_file_name; |
| 185 | Lisp_Object Qdirectory_file_name; |
| 186 | Lisp_Object Qfile_name_directory; |
| 187 | Lisp_Object Qfile_name_nondirectory; |
| 188 | Lisp_Object Qunhandled_file_name_directory; |
| 189 | Lisp_Object Qfile_name_as_directory; |
| 190 | Lisp_Object Qcopy_file; |
| 191 | Lisp_Object Qmake_directory; |
| 192 | Lisp_Object Qdelete_directory; |
| 193 | Lisp_Object Qdelete_file; |
| 194 | Lisp_Object Qrename_file; |
| 195 | Lisp_Object Qadd_name_to_file; |
| 196 | Lisp_Object Qmake_symbolic_link; |
| 197 | Lisp_Object Qfile_exists_p; |
| 198 | Lisp_Object Qfile_executable_p; |
| 199 | Lisp_Object Qfile_readable_p; |
| 200 | Lisp_Object Qfile_symlink_p; |
| 201 | Lisp_Object Qfile_writable_p; |
| 202 | Lisp_Object Qfile_directory_p; |
| 203 | Lisp_Object Qfile_accessible_directory_p; |
| 204 | Lisp_Object Qfile_modes; |
| 205 | Lisp_Object Qset_file_modes; |
| 206 | Lisp_Object Qfile_newer_than_file_p; |
| 207 | Lisp_Object Qinsert_file_contents; |
| 208 | Lisp_Object Qwrite_region; |
| 209 | Lisp_Object Qverify_visited_file_modtime; |
| 210 | Lisp_Object Qset_visited_file_modtime; |
| 211 | |
| 212 | DEFUN ("find-file-name-handler", Ffind_file_name_handler, Sfind_file_name_handler, 2, 2, 0, |
| 213 | "Return FILENAME's handler function for OPERATION, if it has one.\n\ |
| 214 | Otherwise, return nil.\n\ |
| 215 | A file name is handled if one of the regular expressions in\n\ |
| 216 | `file-name-handler-alist' matches it.\n\n\ |
| 217 | If OPERATION equals `inhibit-file-name-operation', then we ignore\n\ |
| 218 | any handlers that are members of `inhibit-file-name-handlers',\n\ |
| 219 | but we still do run any other handlers. This lets handlers\n\ |
| 220 | use the standard functions without calling themselves recursively.") |
| 221 | (filename, operation) |
| 222 | Lisp_Object filename, operation; |
| 223 | { |
| 224 | /* This function must not munge the match data. */ |
| 225 | Lisp_Object chain, inhibited_handlers; |
| 226 | |
| 227 | CHECK_STRING (filename, 0); |
| 228 | |
| 229 | if (EQ (operation, Vinhibit_file_name_operation)) |
| 230 | inhibited_handlers = Vinhibit_file_name_handlers; |
| 231 | else |
| 232 | inhibited_handlers = Qnil; |
| 233 | |
| 234 | for (chain = Vfile_name_handler_alist; XTYPE (chain) == Lisp_Cons; |
| 235 | chain = XCONS (chain)->cdr) |
| 236 | { |
| 237 | Lisp_Object elt; |
| 238 | elt = XCONS (chain)->car; |
| 239 | if (XTYPE (elt) == Lisp_Cons) |
| 240 | { |
| 241 | Lisp_Object string; |
| 242 | string = XCONS (elt)->car; |
| 243 | if (XTYPE (string) == Lisp_String |
| 244 | && fast_string_match (string, filename) >= 0) |
| 245 | { |
| 246 | Lisp_Object handler, tem; |
| 247 | |
| 248 | handler = XCONS (elt)->cdr; |
| 249 | tem = Fmemq (handler, inhibited_handlers); |
| 250 | if (NILP (tem)) |
| 251 | return handler; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | QUIT; |
| 256 | } |
| 257 | return Qnil; |
| 258 | } |
| 259 | \f |
| 260 | DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, |
| 261 | 1, 1, 0, |
| 262 | "Return the directory component in file name NAME.\n\ |
| 263 | Return nil if NAME does not include a directory.\n\ |
| 264 | Otherwise return a directory spec.\n\ |
| 265 | Given a Unix syntax file name, returns a string ending in slash;\n\ |
| 266 | on VMS, perhaps instead a string ending in `:', `]' or `>'.") |
| 267 | (file) |
| 268 | Lisp_Object file; |
| 269 | { |
| 270 | register unsigned char *beg; |
| 271 | register unsigned char *p; |
| 272 | Lisp_Object handler; |
| 273 | |
| 274 | CHECK_STRING (file, 0); |
| 275 | |
| 276 | /* If the file name has special constructs in it, |
| 277 | call the corresponding file handler. */ |
| 278 | handler = Ffind_file_name_handler (file, Qfile_name_directory); |
| 279 | if (!NILP (handler)) |
| 280 | return call2 (handler, Qfile_name_directory, file); |
| 281 | |
| 282 | #ifdef FILE_SYSTEM_CASE |
| 283 | file = FILE_SYSTEM_CASE (file); |
| 284 | #endif |
| 285 | beg = XSTRING (file)->data; |
| 286 | p = beg + XSTRING (file)->size; |
| 287 | |
| 288 | while (p != beg && p[-1] != '/' |
| 289 | #ifdef VMS |
| 290 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 291 | #endif /* VMS */ |
| 292 | #ifdef MSDOS |
| 293 | && p[-1] != ':' |
| 294 | #endif |
| 295 | ) p--; |
| 296 | |
| 297 | if (p == beg) |
| 298 | return Qnil; |
| 299 | #ifdef MSDOS |
| 300 | /* Expansion of "c:" to drive and default directory. */ |
| 301 | if (p == beg + 2 && beg[1] == ':') |
| 302 | { |
| 303 | int drive = (*beg) - 'a'; |
| 304 | /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */ |
| 305 | unsigned char *res = alloca (MAXPATHLEN + 5); |
| 306 | if (getdefdir (drive + 1, res + 2)) |
| 307 | { |
| 308 | res[0] = drive + 'a'; |
| 309 | res[1] = ':'; |
| 310 | if (res[strlen (res) - 1] != '/') |
| 311 | strcat (res, "/"); |
| 312 | beg = res; |
| 313 | p = beg + strlen (beg); |
| 314 | } |
| 315 | } |
| 316 | #endif |
| 317 | return make_string (beg, p - beg); |
| 318 | } |
| 319 | |
| 320 | DEFUN ("file-name-nondirectory", Ffile_name_nondirectory, Sfile_name_nondirectory, |
| 321 | 1, 1, 0, |
| 322 | "Return file name NAME sans its directory.\n\ |
| 323 | For example, in a Unix-syntax file name,\n\ |
| 324 | this is everything after the last slash,\n\ |
| 325 | or the entire name if it contains no slash.") |
| 326 | (file) |
| 327 | Lisp_Object file; |
| 328 | { |
| 329 | register unsigned char *beg, *p, *end; |
| 330 | Lisp_Object handler; |
| 331 | |
| 332 | CHECK_STRING (file, 0); |
| 333 | |
| 334 | /* If the file name has special constructs in it, |
| 335 | call the corresponding file handler. */ |
| 336 | handler = Ffind_file_name_handler (file, Qfile_name_nondirectory); |
| 337 | if (!NILP (handler)) |
| 338 | return call2 (handler, Qfile_name_nondirectory, file); |
| 339 | |
| 340 | beg = XSTRING (file)->data; |
| 341 | end = p = beg + XSTRING (file)->size; |
| 342 | |
| 343 | while (p != beg && p[-1] != '/' |
| 344 | #ifdef VMS |
| 345 | && p[-1] != ':' && p[-1] != ']' && p[-1] != '>' |
| 346 | #endif /* VMS */ |
| 347 | #ifdef MSDOS |
| 348 | && p[-1] != ':' |
| 349 | #endif |
| 350 | ) p--; |
| 351 | |
| 352 | return make_string (p, end - p); |
| 353 | } |
| 354 | |
| 355 | DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory, Sunhandled_file_name_directory, 1, 1, 0, |
| 356 | "Return a directly usable directory name somehow associated with FILENAME.\n\ |
| 357 | A `directly usable' directory name is one that may be used without the\n\ |
| 358 | intervention of any file handler.\n\ |
| 359 | If FILENAME is a directly usable file itself, return\n\ |
| 360 | (file-name-directory FILENAME).\n\ |
| 361 | The `call-process' and `start-process' functions use this function to\n\ |
| 362 | get a current directory to run processes in.") |
| 363 | (filename) |
| 364 | Lisp_Object filename; |
| 365 | { |
| 366 | Lisp_Object handler; |
| 367 | |
| 368 | /* If the file name has special constructs in it, |
| 369 | call the corresponding file handler. */ |
| 370 | handler = Ffind_file_name_handler (filename, Qunhandled_file_name_directory); |
| 371 | if (!NILP (handler)) |
| 372 | return call2 (handler, Qunhandled_file_name_directory, filename); |
| 373 | |
| 374 | return Ffile_name_directory (filename); |
| 375 | } |
| 376 | |
| 377 | \f |
| 378 | char * |
| 379 | file_name_as_directory (out, in) |
| 380 | char *out, *in; |
| 381 | { |
| 382 | int size = strlen (in) - 1; |
| 383 | |
| 384 | strcpy (out, in); |
| 385 | |
| 386 | #ifdef VMS |
| 387 | /* Is it already a directory string? */ |
| 388 | if (in[size] == ':' || in[size] == ']' || in[size] == '>') |
| 389 | return out; |
| 390 | /* Is it a VMS directory file name? If so, hack VMS syntax. */ |
| 391 | else if (! index (in, '/') |
| 392 | && ((size > 3 && ! strcmp (&in[size - 3], ".DIR")) |
| 393 | || (size > 3 && ! strcmp (&in[size - 3], ".dir")) |
| 394 | || (size > 5 && (! strncmp (&in[size - 5], ".DIR", 4) |
| 395 | || ! strncmp (&in[size - 5], ".dir", 4)) |
| 396 | && (in[size - 1] == '.' || in[size - 1] == ';') |
| 397 | && in[size] == '1'))) |
| 398 | { |
| 399 | register char *p, *dot; |
| 400 | char brack; |
| 401 | |
| 402 | /* x.dir -> [.x] |
| 403 | dir:x.dir --> dir:[x] |
| 404 | dir:[x]y.dir --> dir:[x.y] */ |
| 405 | p = in + size; |
| 406 | while (p != in && *p != ':' && *p != '>' && *p != ']') p--; |
| 407 | if (p != in) |
| 408 | { |
| 409 | strncpy (out, in, p - in); |
| 410 | out[p - in] = '\0'; |
| 411 | if (*p == ':') |
| 412 | { |
| 413 | brack = ']'; |
| 414 | strcat (out, ":["); |
| 415 | } |
| 416 | else |
| 417 | { |
| 418 | brack = *p; |
| 419 | strcat (out, "."); |
| 420 | } |
| 421 | p++; |
| 422 | } |
| 423 | else |
| 424 | { |
| 425 | brack = ']'; |
| 426 | strcpy (out, "[."); |
| 427 | } |
| 428 | dot = index (p, '.'); |
| 429 | if (dot) |
| 430 | { |
| 431 | /* blindly remove any extension */ |
| 432 | size = strlen (out) + (dot - p); |
| 433 | strncat (out, p, dot - p); |
| 434 | } |
| 435 | else |
| 436 | { |
| 437 | strcat (out, p); |
| 438 | size = strlen (out); |
| 439 | } |
| 440 | out[size++] = brack; |
| 441 | out[size] = '\0'; |
| 442 | } |
| 443 | #else /* not VMS */ |
| 444 | /* For Unix syntax, Append a slash if necessary */ |
| 445 | #ifdef MSDOS |
| 446 | if (out[size] != ':' && out[size] != '/') |
| 447 | #else |
| 448 | if (out[size] != '/') |
| 449 | #endif |
| 450 | strcat (out, "/"); |
| 451 | #endif /* not VMS */ |
| 452 | return out; |
| 453 | } |
| 454 | |
| 455 | DEFUN ("file-name-as-directory", Ffile_name_as_directory, |
| 456 | Sfile_name_as_directory, 1, 1, 0, |
| 457 | "Return a string representing file FILENAME interpreted as a directory.\n\ |
| 458 | This operation exists because a directory is also a file, but its name as\n\ |
| 459 | a directory is different from its name as a file.\n\ |
| 460 | The result can be used as the value of `default-directory'\n\ |
| 461 | or passed as second argument to `expand-file-name'.\n\ |
| 462 | For a Unix-syntax file name, just appends a slash.\n\ |
| 463 | On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc.") |
| 464 | (file) |
| 465 | Lisp_Object file; |
| 466 | { |
| 467 | char *buf; |
| 468 | Lisp_Object handler; |
| 469 | |
| 470 | CHECK_STRING (file, 0); |
| 471 | if (NILP (file)) |
| 472 | return Qnil; |
| 473 | |
| 474 | /* If the file name has special constructs in it, |
| 475 | call the corresponding file handler. */ |
| 476 | handler = Ffind_file_name_handler (file, Qfile_name_as_directory); |
| 477 | if (!NILP (handler)) |
| 478 | return call2 (handler, Qfile_name_as_directory, file); |
| 479 | |
| 480 | buf = (char *) alloca (XSTRING (file)->size + 10); |
| 481 | return build_string (file_name_as_directory (buf, XSTRING (file)->data)); |
| 482 | } |
| 483 | \f |
| 484 | /* |
| 485 | * Convert from directory name to filename. |
| 486 | * On VMS: |
| 487 | * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1 |
| 488 | * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1 |
| 489 | * On UNIX, it's simple: just make sure there is a terminating / |
| 490 | |
| 491 | * Value is nonzero if the string output is different from the input. |
| 492 | */ |
| 493 | |
| 494 | directory_file_name (src, dst) |
| 495 | char *src, *dst; |
| 496 | { |
| 497 | long slen; |
| 498 | #ifdef VMS |
| 499 | long rlen; |
| 500 | char * ptr, * rptr; |
| 501 | char bracket; |
| 502 | struct FAB fab = cc$rms_fab; |
| 503 | struct NAM nam = cc$rms_nam; |
| 504 | char esa[NAM$C_MAXRSS]; |
| 505 | #endif /* VMS */ |
| 506 | |
| 507 | slen = strlen (src); |
| 508 | #ifdef VMS |
| 509 | if (! index (src, '/') |
| 510 | && (src[slen - 1] == ']' |
| 511 | || src[slen - 1] == ':' |
| 512 | || src[slen - 1] == '>')) |
| 513 | { |
| 514 | /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */ |
| 515 | fab.fab$l_fna = src; |
| 516 | fab.fab$b_fns = slen; |
| 517 | fab.fab$l_nam = &nam; |
| 518 | fab.fab$l_fop = FAB$M_NAM; |
| 519 | |
| 520 | nam.nam$l_esa = esa; |
| 521 | nam.nam$b_ess = sizeof esa; |
| 522 | nam.nam$b_nop |= NAM$M_SYNCHK; |
| 523 | |
| 524 | /* We call SYS$PARSE to handle such things as [--] for us. */ |
| 525 | if (SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL) |
| 526 | { |
| 527 | slen = nam.nam$b_esl; |
| 528 | if (esa[slen - 1] == ';' && esa[slen - 2] == '.') |
| 529 | slen -= 2; |
| 530 | esa[slen] = '\0'; |
| 531 | src = esa; |
| 532 | } |
| 533 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 534 | { |
| 535 | /* what about when we have logical_name:???? */ |
| 536 | if (src[slen - 1] == ':') |
| 537 | { /* Xlate logical name and see what we get */ |
| 538 | ptr = strcpy (dst, src); /* upper case for getenv */ |
| 539 | while (*ptr) |
| 540 | { |
| 541 | if ('a' <= *ptr && *ptr <= 'z') |
| 542 | *ptr -= 040; |
| 543 | ptr++; |
| 544 | } |
| 545 | dst[slen - 1] = 0; /* remove colon */ |
| 546 | if (!(src = egetenv (dst))) |
| 547 | return 0; |
| 548 | /* should we jump to the beginning of this procedure? |
| 549 | Good points: allows us to use logical names that xlate |
| 550 | to Unix names, |
| 551 | Bad points: can be a problem if we just translated to a device |
| 552 | name... |
| 553 | For now, I'll punt and always expect VMS names, and hope for |
| 554 | the best! */ |
| 555 | slen = strlen (src); |
| 556 | if (src[slen - 1] != ']' && src[slen - 1] != '>') |
| 557 | { /* no recursion here! */ |
| 558 | strcpy (dst, src); |
| 559 | return 0; |
| 560 | } |
| 561 | } |
| 562 | else |
| 563 | { /* not a directory spec */ |
| 564 | strcpy (dst, src); |
| 565 | return 0; |
| 566 | } |
| 567 | } |
| 568 | bracket = src[slen - 1]; |
| 569 | |
| 570 | /* If bracket is ']' or '>', bracket - 2 is the corresponding |
| 571 | opening bracket. */ |
| 572 | ptr = index (src, bracket - 2); |
| 573 | if (ptr == 0) |
| 574 | { /* no opening bracket */ |
| 575 | strcpy (dst, src); |
| 576 | return 0; |
| 577 | } |
| 578 | if (!(rptr = rindex (src, '.'))) |
| 579 | rptr = ptr; |
| 580 | slen = rptr - src; |
| 581 | strncpy (dst, src, slen); |
| 582 | dst[slen] = '\0'; |
| 583 | if (*rptr == '.') |
| 584 | { |
| 585 | dst[slen++] = bracket; |
| 586 | dst[slen] = '\0'; |
| 587 | } |
| 588 | else |
| 589 | { |
| 590 | /* If we have the top-level of a rooted directory (i.e. xx:[000000]), |
| 591 | then translate the device and recurse. */ |
| 592 | if (dst[slen - 1] == ':' |
| 593 | && dst[slen - 2] != ':' /* skip decnet nodes */ |
| 594 | && strcmp(src + slen, "[000000]") == 0) |
| 595 | { |
| 596 | dst[slen - 1] = '\0'; |
| 597 | if ((ptr = egetenv (dst)) |
| 598 | && (rlen = strlen (ptr) - 1) > 0 |
| 599 | && (ptr[rlen] == ']' || ptr[rlen] == '>') |
| 600 | && ptr[rlen - 1] == '.') |
| 601 | { |
| 602 | char * buf = (char *) alloca (strlen (ptr) + 1); |
| 603 | strcpy (buf, ptr); |
| 604 | buf[rlen - 1] = ']'; |
| 605 | buf[rlen] = '\0'; |
| 606 | return directory_file_name (buf, dst); |
| 607 | } |
| 608 | else |
| 609 | dst[slen - 1] = ':'; |
| 610 | } |
| 611 | strcat (dst, "[000000]"); |
| 612 | slen += 8; |
| 613 | } |
| 614 | rptr++; |
| 615 | rlen = strlen (rptr) - 1; |
| 616 | strncat (dst, rptr, rlen); |
| 617 | dst[slen + rlen] = '\0'; |
| 618 | strcat (dst, ".DIR.1"); |
| 619 | return 1; |
| 620 | } |
| 621 | #endif /* VMS */ |
| 622 | /* Process as Unix format: just remove any final slash. |
| 623 | But leave "/" unchanged; do not change it to "". */ |
| 624 | strcpy (dst, src); |
| 625 | if (slen > 1 |
| 626 | && dst[slen - 1] == '/' |
| 627 | #ifdef MSDOS |
| 628 | && dst[slen - 2] != ':' |
| 629 | #endif |
| 630 | ) |
| 631 | dst[slen - 1] = 0; |
| 632 | return 1; |
| 633 | } |
| 634 | |
| 635 | DEFUN ("directory-file-name", Fdirectory_file_name, Sdirectory_file_name, |
| 636 | 1, 1, 0, |
| 637 | "Returns the file name of the directory named DIR.\n\ |
| 638 | This is the name of the file that holds the data for the directory DIR.\n\ |
| 639 | This operation exists because a directory is also a file, but its name as\n\ |
| 640 | a directory is different from its name as a file.\n\ |
| 641 | In Unix-syntax, this function just removes the final slash.\n\ |
| 642 | On VMS, given a VMS-syntax directory name such as \"[X.Y]\",\n\ |
| 643 | it returns a file name such as \"[X]Y.DIR.1\".") |
| 644 | (directory) |
| 645 | Lisp_Object directory; |
| 646 | { |
| 647 | char *buf; |
| 648 | Lisp_Object handler; |
| 649 | |
| 650 | CHECK_STRING (directory, 0); |
| 651 | |
| 652 | if (NILP (directory)) |
| 653 | return Qnil; |
| 654 | |
| 655 | /* If the file name has special constructs in it, |
| 656 | call the corresponding file handler. */ |
| 657 | handler = Ffind_file_name_handler (directory, Qdirectory_file_name); |
| 658 | if (!NILP (handler)) |
| 659 | return call2 (handler, Qdirectory_file_name, directory); |
| 660 | |
| 661 | #ifdef VMS |
| 662 | /* 20 extra chars is insufficient for VMS, since we might perform a |
| 663 | logical name translation. an equivalence string can be up to 255 |
| 664 | chars long, so grab that much extra space... - sss */ |
| 665 | buf = (char *) alloca (XSTRING (directory)->size + 20 + 255); |
| 666 | #else |
| 667 | buf = (char *) alloca (XSTRING (directory)->size + 20); |
| 668 | #endif |
| 669 | directory_file_name (XSTRING (directory)->data, buf); |
| 670 | return build_string (buf); |
| 671 | } |
| 672 | |
| 673 | DEFUN ("make-temp-name", Fmake_temp_name, Smake_temp_name, 1, 1, 0, |
| 674 | "Generate temporary file name (string) starting with PREFIX (a string).\n\ |
| 675 | The Emacs process number forms part of the result,\n\ |
| 676 | so there is no danger of generating a name being used by another process.") |
| 677 | (prefix) |
| 678 | Lisp_Object prefix; |
| 679 | { |
| 680 | Lisp_Object val; |
| 681 | val = concat2 (prefix, build_string ("XXXXXX")); |
| 682 | mktemp (XSTRING (val)->data); |
| 683 | return val; |
| 684 | } |
| 685 | \f |
| 686 | DEFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 687 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 688 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 689 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 690 | the current buffer's value of default-directory is used.\n\ |
| 691 | Path components that are `.' are removed, and \n\ |
| 692 | path components followed by `..' are removed, along with the `..' itself;\n\ |
| 693 | note that these simplifications are done without checking the resulting\n\ |
| 694 | paths in the file system.\n\ |
| 695 | An initial `~/' expands to your home directory.\n\ |
| 696 | An initial `~USER/' expands to USER's home directory.\n\ |
| 697 | See also the function `substitute-in-file-name'.") |
| 698 | (name, defalt) |
| 699 | Lisp_Object name, defalt; |
| 700 | { |
| 701 | unsigned char *nm; |
| 702 | |
| 703 | register unsigned char *newdir, *p, *o; |
| 704 | int tlen; |
| 705 | unsigned char *target; |
| 706 | struct passwd *pw; |
| 707 | #ifdef VMS |
| 708 | unsigned char * colon = 0; |
| 709 | unsigned char * close = 0; |
| 710 | unsigned char * slash = 0; |
| 711 | unsigned char * brack = 0; |
| 712 | int lbrack = 0, rbrack = 0; |
| 713 | int dots = 0; |
| 714 | #endif /* VMS */ |
| 715 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 716 | int drive = -1; |
| 717 | int relpath = 0; |
| 718 | unsigned char *tmp, *defdir; |
| 719 | #endif |
| 720 | Lisp_Object handler; |
| 721 | |
| 722 | CHECK_STRING (name, 0); |
| 723 | |
| 724 | /* If the file name has special constructs in it, |
| 725 | call the corresponding file handler. */ |
| 726 | handler = Ffind_file_name_handler (name, Qexpand_file_name); |
| 727 | if (!NILP (handler)) |
| 728 | return call3 (handler, Qexpand_file_name, name, defalt); |
| 729 | |
| 730 | /* Use the buffer's default-directory if DEFALT is omitted. */ |
| 731 | if (NILP (defalt)) |
| 732 | defalt = current_buffer->directory; |
| 733 | CHECK_STRING (defalt, 1); |
| 734 | |
| 735 | /* Make sure DEFALT is properly expanded. |
| 736 | It would be better to do this down below where we actually use |
| 737 | defalt. Unfortunately, calling Fexpand_file_name recursively |
| 738 | could invoke GC, and the strings might be relocated. This would |
| 739 | be annoying because we have pointers into strings lying around |
| 740 | that would need adjusting, and people would add new pointers to |
| 741 | the code and forget to adjust them, resulting in intermittent bugs. |
| 742 | Putting this call here avoids all that crud. |
| 743 | |
| 744 | The EQ test avoids infinite recursion. */ |
| 745 | if (! NILP (defalt) && !EQ (defalt, name) |
| 746 | /* This saves time in a common case. */ |
| 747 | && XSTRING (defalt)->data[0] != '/') |
| 748 | { |
| 749 | struct gcpro gcpro1; |
| 750 | |
| 751 | GCPRO1 (name); |
| 752 | defalt = Fexpand_file_name (defalt, Qnil); |
| 753 | UNGCPRO; |
| 754 | } |
| 755 | |
| 756 | #ifdef VMS |
| 757 | /* Filenames on VMS are always upper case. */ |
| 758 | name = Fupcase (name); |
| 759 | #endif |
| 760 | #ifdef FILE_SYSTEM_CASE |
| 761 | name = FILE_SYSTEM_CASE (name); |
| 762 | #endif |
| 763 | |
| 764 | nm = XSTRING (name)->data; |
| 765 | |
| 766 | #ifdef MSDOS |
| 767 | /* firstly, strip drive name. */ |
| 768 | { |
| 769 | unsigned char *colon = rindex (nm, ':'); |
| 770 | if (colon) |
| 771 | if (nm == colon) |
| 772 | nm++; |
| 773 | else |
| 774 | { |
| 775 | drive = tolower (colon[-1]) - 'a'; |
| 776 | nm = colon + 1; |
| 777 | if (*nm != '/') |
| 778 | { |
| 779 | defdir = alloca (MAXPATHLEN + 1); |
| 780 | relpath = getdefdir (drive + 1, defdir); |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | #endif |
| 785 | |
| 786 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 787 | If no /./ or /../ we can return right away. */ |
| 788 | if ( |
| 789 | nm[0] == '/' |
| 790 | #ifdef VMS |
| 791 | || index (nm, ':') |
| 792 | #endif /* VMS */ |
| 793 | ) |
| 794 | { |
| 795 | /* If it turns out that the filename we want to return is just a |
| 796 | suffix of FILENAME, we don't need to go through and edit |
| 797 | things; we just need to construct a new string using data |
| 798 | starting at the middle of FILENAME. If we set lose to a |
| 799 | non-zero value, that means we've discovered that we can't do |
| 800 | that cool trick. */ |
| 801 | int lose = 0; |
| 802 | |
| 803 | p = nm; |
| 804 | while (*p) |
| 805 | { |
| 806 | /* Since we know the path is absolute, we can assume that each |
| 807 | element starts with a "/". */ |
| 808 | |
| 809 | /* "//" anywhere isn't necessarily hairy; we just start afresh |
| 810 | with the second slash. */ |
| 811 | if (p[0] == '/' && p[1] == '/' |
| 812 | #ifdef APOLLO |
| 813 | /* // at start of filename is meaningful on Apollo system */ |
| 814 | && nm != p |
| 815 | #endif /* APOLLO */ |
| 816 | ) |
| 817 | nm = p + 1; |
| 818 | |
| 819 | /* "~" is hairy as the start of any path element. */ |
| 820 | if (p[0] == '/' && p[1] == '~') |
| 821 | nm = p + 1, lose = 1; |
| 822 | |
| 823 | /* "." and ".." are hairy. */ |
| 824 | if (p[0] == '/' |
| 825 | && p[1] == '.' |
| 826 | && (p[2] == '/' |
| 827 | || p[2] == 0 |
| 828 | || (p[2] == '.' && (p[3] == '/' |
| 829 | || p[3] == 0)))) |
| 830 | lose = 1; |
| 831 | #ifdef VMS |
| 832 | if (p[0] == '\\') |
| 833 | lose = 1; |
| 834 | if (p[0] == '/') { |
| 835 | /* if dev:[dir]/, move nm to / */ |
| 836 | if (!slash && p > nm && (brack || colon)) { |
| 837 | nm = (brack ? brack + 1 : colon + 1); |
| 838 | lbrack = rbrack = 0; |
| 839 | brack = 0; |
| 840 | colon = 0; |
| 841 | } |
| 842 | slash = p; |
| 843 | } |
| 844 | if (p[0] == '-') |
| 845 | #ifndef VMS4_4 |
| 846 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 847 | if (lbrack == rbrack) |
| 848 | { |
| 849 | if (dots < 2) /* this is to allow negative version numbers */ |
| 850 | p[0] = '_'; |
| 851 | } |
| 852 | else |
| 853 | #endif /* VMS4_4 */ |
| 854 | if (lbrack > rbrack && |
| 855 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 856 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 857 | lose = 1; |
| 858 | #ifndef VMS4_4 |
| 859 | else |
| 860 | p[0] = '_'; |
| 861 | #endif /* VMS4_4 */ |
| 862 | /* count open brackets, reset close bracket pointer */ |
| 863 | if (p[0] == '[' || p[0] == '<') |
| 864 | lbrack++, brack = 0; |
| 865 | /* count close brackets, set close bracket pointer */ |
| 866 | if (p[0] == ']' || p[0] == '>') |
| 867 | rbrack++, brack = p; |
| 868 | /* detect ][ or >< */ |
| 869 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 870 | lose = 1; |
| 871 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 872 | nm = p + 1, lose = 1; |
| 873 | if (p[0] == ':' && (colon || slash)) |
| 874 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 875 | if (brack) |
| 876 | { |
| 877 | nm = brack + 1; |
| 878 | brack = 0; |
| 879 | } |
| 880 | /* if /pathname/dev:, move nm to dev: */ |
| 881 | else if (slash) |
| 882 | nm = slash + 1; |
| 883 | /* if node::dev:, move colon following dev */ |
| 884 | else if (colon && colon[-1] == ':') |
| 885 | colon = p; |
| 886 | /* if dev1:dev2:, move nm to dev2: */ |
| 887 | else if (colon && colon[-1] != ':') |
| 888 | { |
| 889 | nm = colon + 1; |
| 890 | colon = 0; |
| 891 | } |
| 892 | if (p[0] == ':' && !colon) |
| 893 | { |
| 894 | if (p[1] == ':') |
| 895 | p++; |
| 896 | colon = p; |
| 897 | } |
| 898 | if (lbrack == rbrack) |
| 899 | if (p[0] == ';') |
| 900 | dots = 2; |
| 901 | else if (p[0] == '.') |
| 902 | dots++; |
| 903 | #endif /* VMS */ |
| 904 | p++; |
| 905 | } |
| 906 | if (!lose) |
| 907 | { |
| 908 | #ifdef VMS |
| 909 | if (index (nm, '/')) |
| 910 | return build_string (sys_translate_unix (nm)); |
| 911 | #endif /* VMS */ |
| 912 | #ifndef MSDOS |
| 913 | if (nm == XSTRING (name)->data) |
| 914 | return name; |
| 915 | return build_string (nm); |
| 916 | #endif |
| 917 | } |
| 918 | } |
| 919 | |
| 920 | /* Now determine directory to start with and put it in newdir */ |
| 921 | |
| 922 | newdir = 0; |
| 923 | |
| 924 | if (nm[0] == '~') /* prefix ~ */ |
| 925 | { |
| 926 | if (nm[1] == '/' |
| 927 | #ifdef VMS |
| 928 | || nm[1] == ':' |
| 929 | #endif /* VMS */ |
| 930 | || nm[1] == 0) /* ~ by itself */ |
| 931 | { |
| 932 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 933 | newdir = (unsigned char *) ""; |
| 934 | #ifdef MSDOS |
| 935 | dostounix_filename (newdir); |
| 936 | #endif |
| 937 | nm++; |
| 938 | #ifdef VMS |
| 939 | nm++; /* Don't leave the slash in nm. */ |
| 940 | #endif /* VMS */ |
| 941 | } |
| 942 | else /* ~user/filename */ |
| 943 | { |
| 944 | for (p = nm; *p && (*p != '/' |
| 945 | #ifdef VMS |
| 946 | && *p != ':' |
| 947 | #endif /* VMS */ |
| 948 | ); p++); |
| 949 | o = (unsigned char *) alloca (p - nm + 1); |
| 950 | bcopy ((char *) nm, o, p - nm); |
| 951 | o [p - nm] = 0; |
| 952 | |
| 953 | pw = (struct passwd *) getpwnam (o + 1); |
| 954 | if (pw) |
| 955 | { |
| 956 | newdir = (unsigned char *) pw -> pw_dir; |
| 957 | #ifdef VMS |
| 958 | nm = p + 1; /* skip the terminator */ |
| 959 | #else |
| 960 | nm = p; |
| 961 | #endif /* VMS */ |
| 962 | } |
| 963 | |
| 964 | /* If we don't find a user of that name, leave the name |
| 965 | unchanged; don't move nm forward to p. */ |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | if (nm[0] != '/' |
| 970 | #ifdef VMS |
| 971 | && !index (nm, ':') |
| 972 | #endif /* not VMS */ |
| 973 | #ifdef MSDOS |
| 974 | && drive == -1 |
| 975 | #endif |
| 976 | && !newdir) |
| 977 | { |
| 978 | newdir = XSTRING (defalt)->data; |
| 979 | } |
| 980 | |
| 981 | #ifdef MSDOS |
| 982 | if (newdir == 0 && relpath) |
| 983 | newdir = defdir; |
| 984 | #endif |
| 985 | if (newdir != 0) |
| 986 | { |
| 987 | /* Get rid of any slash at the end of newdir. */ |
| 988 | int length = strlen (newdir); |
| 989 | /* Adding `length > 1 &&' makes ~ expand into / when homedir |
| 990 | is the root dir. People disagree about whether that is right. |
| 991 | Anyway, we can't take the risk of this change now. */ |
| 992 | #ifdef MSDOS |
| 993 | if (newdir[1] != ':' && length > 1) |
| 994 | #endif |
| 995 | if (newdir[length - 1] == '/') |
| 996 | { |
| 997 | unsigned char *temp = (unsigned char *) alloca (length); |
| 998 | bcopy (newdir, temp, length - 1); |
| 999 | temp[length - 1] = 0; |
| 1000 | newdir = temp; |
| 1001 | } |
| 1002 | tlen = length + 1; |
| 1003 | } |
| 1004 | else |
| 1005 | tlen = 0; |
| 1006 | |
| 1007 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1008 | tlen += strlen (nm) + 1; |
| 1009 | #ifdef MSDOS |
| 1010 | /* Add reserved space for drive name. */ |
| 1011 | target = (unsigned char *) alloca (tlen + 2) + 2; |
| 1012 | #else |
| 1013 | target = (unsigned char *) alloca (tlen); |
| 1014 | #endif |
| 1015 | *target = 0; |
| 1016 | |
| 1017 | if (newdir) |
| 1018 | { |
| 1019 | #ifndef VMS |
| 1020 | if (nm[0] == 0 || nm[0] == '/') |
| 1021 | strcpy (target, newdir); |
| 1022 | else |
| 1023 | #endif |
| 1024 | file_name_as_directory (target, newdir); |
| 1025 | } |
| 1026 | |
| 1027 | strcat (target, nm); |
| 1028 | #ifdef VMS |
| 1029 | if (index (target, '/')) |
| 1030 | strcpy (target, sys_translate_unix (target)); |
| 1031 | #endif /* VMS */ |
| 1032 | |
| 1033 | /* Now canonicalize by removing /. and /foo/.. if they appear. */ |
| 1034 | |
| 1035 | p = target; |
| 1036 | o = target; |
| 1037 | |
| 1038 | while (*p) |
| 1039 | { |
| 1040 | #ifdef VMS |
| 1041 | if (*p != ']' && *p != '>' && *p != '-') |
| 1042 | { |
| 1043 | if (*p == '\\') |
| 1044 | p++; |
| 1045 | *o++ = *p++; |
| 1046 | } |
| 1047 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 1048 | /* brackets are offset from each other by 2 */ |
| 1049 | { |
| 1050 | p += 2; |
| 1051 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 1052 | /* convert [foo][bar] to [bar] */ |
| 1053 | while (o[-1] != '[' && o[-1] != '<') |
| 1054 | o--; |
| 1055 | else if (*p == '-' && *o != '.') |
| 1056 | *--p = '.'; |
| 1057 | } |
| 1058 | else if (p[0] == '-' && o[-1] == '.' && |
| 1059 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 1060 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 1061 | { |
| 1062 | do |
| 1063 | o--; |
| 1064 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 1065 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 1066 | p += 2; |
| 1067 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 1068 | p++, o--; |
| 1069 | /* else [foo.-] ==> [-] */ |
| 1070 | } |
| 1071 | else |
| 1072 | { |
| 1073 | #ifndef VMS4_4 |
| 1074 | if (*p == '-' && |
| 1075 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 1076 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 1077 | *p = '_'; |
| 1078 | #endif /* VMS4_4 */ |
| 1079 | *o++ = *p++; |
| 1080 | } |
| 1081 | #else /* not VMS */ |
| 1082 | if (*p != '/') |
| 1083 | { |
| 1084 | *o++ = *p++; |
| 1085 | } |
| 1086 | else if (!strncmp (p, "//", 2) |
| 1087 | #ifdef APOLLO |
| 1088 | /* // at start of filename is meaningful in Apollo system */ |
| 1089 | && o != target |
| 1090 | #endif /* APOLLO */ |
| 1091 | ) |
| 1092 | { |
| 1093 | o = target; |
| 1094 | p++; |
| 1095 | } |
| 1096 | else if (p[0] == '/' |
| 1097 | && p[1] == '.' |
| 1098 | && (p[2] == '/' |
| 1099 | || p[2] == 0)) |
| 1100 | { |
| 1101 | /* If "/." is the entire filename, keep the "/". Otherwise, |
| 1102 | just delete the whole "/.". */ |
| 1103 | if (o == target && p[2] == '\0') |
| 1104 | *o++ = *p; |
| 1105 | p += 2; |
| 1106 | } |
| 1107 | else if (!strncmp (p, "/..", 3) |
| 1108 | /* `/../' is the "superroot" on certain file systems. */ |
| 1109 | && o != target |
| 1110 | && (p[3] == '/' || p[3] == 0)) |
| 1111 | { |
| 1112 | while (o != target && *--o != '/') |
| 1113 | ; |
| 1114 | #ifdef APOLLO |
| 1115 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 1116 | ++o; |
| 1117 | else |
| 1118 | #endif /* APOLLO */ |
| 1119 | if (o == target && *o == '/') |
| 1120 | ++o; |
| 1121 | p += 3; |
| 1122 | } |
| 1123 | else |
| 1124 | { |
| 1125 | *o++ = *p++; |
| 1126 | } |
| 1127 | #endif /* not VMS */ |
| 1128 | } |
| 1129 | |
| 1130 | #ifdef MSDOS |
| 1131 | /* at last, set drive name. */ |
| 1132 | if (target[1] != ':') |
| 1133 | { |
| 1134 | target -= 2; |
| 1135 | target[0] = (drive < 0 ? getdisk () : drive) + 'a'; |
| 1136 | target[1] = ':'; |
| 1137 | } |
| 1138 | #endif |
| 1139 | |
| 1140 | return make_string (target, o - target); |
| 1141 | } |
| 1142 | #if 0 |
| 1143 | /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. |
| 1144 | DEAFUN ("expand-file-name", Fexpand_file_name, Sexpand_file_name, 1, 2, 0, |
| 1145 | "Convert FILENAME to absolute, and canonicalize it.\n\ |
| 1146 | Second arg DEFAULT is directory to start with if FILENAME is relative\n\ |
| 1147 | (does not start with slash); if DEFAULT is nil or missing,\n\ |
| 1148 | the current buffer's value of default-directory is used.\n\ |
| 1149 | Filenames containing `.' or `..' as components are simplified;\n\ |
| 1150 | initial `~/' expands to your home directory.\n\ |
| 1151 | See also the function `substitute-in-file-name'.") |
| 1152 | (name, defalt) |
| 1153 | Lisp_Object name, defalt; |
| 1154 | { |
| 1155 | unsigned char *nm; |
| 1156 | |
| 1157 | register unsigned char *newdir, *p, *o; |
| 1158 | int tlen; |
| 1159 | unsigned char *target; |
| 1160 | struct passwd *pw; |
| 1161 | int lose; |
| 1162 | #ifdef VMS |
| 1163 | unsigned char * colon = 0; |
| 1164 | unsigned char * close = 0; |
| 1165 | unsigned char * slash = 0; |
| 1166 | unsigned char * brack = 0; |
| 1167 | int lbrack = 0, rbrack = 0; |
| 1168 | int dots = 0; |
| 1169 | #endif /* VMS */ |
| 1170 | |
| 1171 | CHECK_STRING (name, 0); |
| 1172 | |
| 1173 | #ifdef VMS |
| 1174 | /* Filenames on VMS are always upper case. */ |
| 1175 | name = Fupcase (name); |
| 1176 | #endif |
| 1177 | |
| 1178 | nm = XSTRING (name)->data; |
| 1179 | |
| 1180 | /* If nm is absolute, flush ...// and detect /./ and /../. |
| 1181 | If no /./ or /../ we can return right away. */ |
| 1182 | if ( |
| 1183 | nm[0] == '/' |
| 1184 | #ifdef VMS |
| 1185 | || index (nm, ':') |
| 1186 | #endif /* VMS */ |
| 1187 | ) |
| 1188 | { |
| 1189 | p = nm; |
| 1190 | lose = 0; |
| 1191 | while (*p) |
| 1192 | { |
| 1193 | if (p[0] == '/' && p[1] == '/' |
| 1194 | #ifdef APOLLO |
| 1195 | /* // at start of filename is meaningful on Apollo system */ |
| 1196 | && nm != p |
| 1197 | #endif /* APOLLO */ |
| 1198 | ) |
| 1199 | nm = p + 1; |
| 1200 | if (p[0] == '/' && p[1] == '~') |
| 1201 | nm = p + 1, lose = 1; |
| 1202 | if (p[0] == '/' && p[1] == '.' |
| 1203 | && (p[2] == '/' || p[2] == 0 |
| 1204 | || (p[2] == '.' && (p[3] == '/' || p[3] == 0)))) |
| 1205 | lose = 1; |
| 1206 | #ifdef VMS |
| 1207 | if (p[0] == '\\') |
| 1208 | lose = 1; |
| 1209 | if (p[0] == '/') { |
| 1210 | /* if dev:[dir]/, move nm to / */ |
| 1211 | if (!slash && p > nm && (brack || colon)) { |
| 1212 | nm = (brack ? brack + 1 : colon + 1); |
| 1213 | lbrack = rbrack = 0; |
| 1214 | brack = 0; |
| 1215 | colon = 0; |
| 1216 | } |
| 1217 | slash = p; |
| 1218 | } |
| 1219 | if (p[0] == '-') |
| 1220 | #ifndef VMS4_4 |
| 1221 | /* VMS pre V4.4,convert '-'s in filenames. */ |
| 1222 | if (lbrack == rbrack) |
| 1223 | { |
| 1224 | if (dots < 2) /* this is to allow negative version numbers */ |
| 1225 | p[0] = '_'; |
| 1226 | } |
| 1227 | else |
| 1228 | #endif /* VMS4_4 */ |
| 1229 | if (lbrack > rbrack && |
| 1230 | ((p[-1] == '.' || p[-1] == '[' || p[-1] == '<') && |
| 1231 | (p[1] == '.' || p[1] == ']' || p[1] == '>'))) |
| 1232 | lose = 1; |
| 1233 | #ifndef VMS4_4 |
| 1234 | else |
| 1235 | p[0] = '_'; |
| 1236 | #endif /* VMS4_4 */ |
| 1237 | /* count open brackets, reset close bracket pointer */ |
| 1238 | if (p[0] == '[' || p[0] == '<') |
| 1239 | lbrack++, brack = 0; |
| 1240 | /* count close brackets, set close bracket pointer */ |
| 1241 | if (p[0] == ']' || p[0] == '>') |
| 1242 | rbrack++, brack = p; |
| 1243 | /* detect ][ or >< */ |
| 1244 | if ((p[0] == ']' || p[0] == '>') && (p[1] == '[' || p[1] == '<')) |
| 1245 | lose = 1; |
| 1246 | if ((p[0] == ':' || p[0] == ']' || p[0] == '>') && p[1] == '~') |
| 1247 | nm = p + 1, lose = 1; |
| 1248 | if (p[0] == ':' && (colon || slash)) |
| 1249 | /* if dev1:[dir]dev2:, move nm to dev2: */ |
| 1250 | if (brack) |
| 1251 | { |
| 1252 | nm = brack + 1; |
| 1253 | brack = 0; |
| 1254 | } |
| 1255 | /* if /pathname/dev:, move nm to dev: */ |
| 1256 | else if (slash) |
| 1257 | nm = slash + 1; |
| 1258 | /* if node::dev:, move colon following dev */ |
| 1259 | else if (colon && colon[-1] == ':') |
| 1260 | colon = p; |
| 1261 | /* if dev1:dev2:, move nm to dev2: */ |
| 1262 | else if (colon && colon[-1] != ':') |
| 1263 | { |
| 1264 | nm = colon + 1; |
| 1265 | colon = 0; |
| 1266 | } |
| 1267 | if (p[0] == ':' && !colon) |
| 1268 | { |
| 1269 | if (p[1] == ':') |
| 1270 | p++; |
| 1271 | colon = p; |
| 1272 | } |
| 1273 | if (lbrack == rbrack) |
| 1274 | if (p[0] == ';') |
| 1275 | dots = 2; |
| 1276 | else if (p[0] == '.') |
| 1277 | dots++; |
| 1278 | #endif /* VMS */ |
| 1279 | p++; |
| 1280 | } |
| 1281 | if (!lose) |
| 1282 | { |
| 1283 | #ifdef VMS |
| 1284 | if (index (nm, '/')) |
| 1285 | return build_string (sys_translate_unix (nm)); |
| 1286 | #endif /* VMS */ |
| 1287 | if (nm == XSTRING (name)->data) |
| 1288 | return name; |
| 1289 | return build_string (nm); |
| 1290 | } |
| 1291 | } |
| 1292 | |
| 1293 | /* Now determine directory to start with and put it in NEWDIR */ |
| 1294 | |
| 1295 | newdir = 0; |
| 1296 | |
| 1297 | if (nm[0] == '~') /* prefix ~ */ |
| 1298 | if (nm[1] == '/' |
| 1299 | #ifdef VMS |
| 1300 | || nm[1] == ':' |
| 1301 | #endif /* VMS */ |
| 1302 | || nm[1] == 0)/* ~/filename */ |
| 1303 | { |
| 1304 | if (!(newdir = (unsigned char *) egetenv ("HOME"))) |
| 1305 | newdir = (unsigned char *) ""; |
| 1306 | nm++; |
| 1307 | #ifdef VMS |
| 1308 | nm++; /* Don't leave the slash in nm. */ |
| 1309 | #endif /* VMS */ |
| 1310 | } |
| 1311 | else /* ~user/filename */ |
| 1312 | { |
| 1313 | /* Get past ~ to user */ |
| 1314 | unsigned char *user = nm + 1; |
| 1315 | /* Find end of name. */ |
| 1316 | unsigned char *ptr = (unsigned char *) index (user, '/'); |
| 1317 | int len = ptr ? ptr - user : strlen (user); |
| 1318 | #ifdef VMS |
| 1319 | unsigned char *ptr1 = index (user, ':'); |
| 1320 | if (ptr1 != 0 && ptr1 - user < len) |
| 1321 | len = ptr1 - user; |
| 1322 | #endif /* VMS */ |
| 1323 | /* Copy the user name into temp storage. */ |
| 1324 | o = (unsigned char *) alloca (len + 1); |
| 1325 | bcopy ((char *) user, o, len); |
| 1326 | o[len] = 0; |
| 1327 | |
| 1328 | /* Look up the user name. */ |
| 1329 | pw = (struct passwd *) getpwnam (o + 1); |
| 1330 | if (!pw) |
| 1331 | error ("\"%s\" isn't a registered user", o + 1); |
| 1332 | |
| 1333 | newdir = (unsigned char *) pw->pw_dir; |
| 1334 | |
| 1335 | /* Discard the user name from NM. */ |
| 1336 | nm += len; |
| 1337 | } |
| 1338 | |
| 1339 | if (nm[0] != '/' |
| 1340 | #ifdef VMS |
| 1341 | && !index (nm, ':') |
| 1342 | #endif /* not VMS */ |
| 1343 | && !newdir) |
| 1344 | { |
| 1345 | if (NILP (defalt)) |
| 1346 | defalt = current_buffer->directory; |
| 1347 | CHECK_STRING (defalt, 1); |
| 1348 | newdir = XSTRING (defalt)->data; |
| 1349 | } |
| 1350 | |
| 1351 | /* Now concatenate the directory and name to new space in the stack frame */ |
| 1352 | |
| 1353 | tlen = (newdir ? strlen (newdir) + 1 : 0) + strlen (nm) + 1; |
| 1354 | target = (unsigned char *) alloca (tlen); |
| 1355 | *target = 0; |
| 1356 | |
| 1357 | if (newdir) |
| 1358 | { |
| 1359 | #ifndef VMS |
| 1360 | if (nm[0] == 0 || nm[0] == '/') |
| 1361 | strcpy (target, newdir); |
| 1362 | else |
| 1363 | #endif |
| 1364 | file_name_as_directory (target, newdir); |
| 1365 | } |
| 1366 | |
| 1367 | strcat (target, nm); |
| 1368 | #ifdef VMS |
| 1369 | if (index (target, '/')) |
| 1370 | strcpy (target, sys_translate_unix (target)); |
| 1371 | #endif /* VMS */ |
| 1372 | |
| 1373 | /* Now canonicalize by removing /. and /foo/.. if they appear */ |
| 1374 | |
| 1375 | p = target; |
| 1376 | o = target; |
| 1377 | |
| 1378 | while (*p) |
| 1379 | { |
| 1380 | #ifdef VMS |
| 1381 | if (*p != ']' && *p != '>' && *p != '-') |
| 1382 | { |
| 1383 | if (*p == '\\') |
| 1384 | p++; |
| 1385 | *o++ = *p++; |
| 1386 | } |
| 1387 | else if ((p[0] == ']' || p[0] == '>') && p[0] == p[1] + 2) |
| 1388 | /* brackets are offset from each other by 2 */ |
| 1389 | { |
| 1390 | p += 2; |
| 1391 | if (*p != '.' && *p != '-' && o[-1] != '.') |
| 1392 | /* convert [foo][bar] to [bar] */ |
| 1393 | while (o[-1] != '[' && o[-1] != '<') |
| 1394 | o--; |
| 1395 | else if (*p == '-' && *o != '.') |
| 1396 | *--p = '.'; |
| 1397 | } |
| 1398 | else if (p[0] == '-' && o[-1] == '.' && |
| 1399 | (p[1] == '.' || p[1] == ']' || p[1] == '>')) |
| 1400 | /* flush .foo.- ; leave - if stopped by '[' or '<' */ |
| 1401 | { |
| 1402 | do |
| 1403 | o--; |
| 1404 | while (o[-1] != '.' && o[-1] != '[' && o[-1] != '<'); |
| 1405 | if (p[1] == '.') /* foo.-.bar ==> bar*/ |
| 1406 | p += 2; |
| 1407 | else if (o[-1] == '.') /* '.foo.-]' ==> ']' */ |
| 1408 | p++, o--; |
| 1409 | /* else [foo.-] ==> [-] */ |
| 1410 | } |
| 1411 | else |
| 1412 | { |
| 1413 | #ifndef VMS4_4 |
| 1414 | if (*p == '-' && |
| 1415 | o[-1] != '[' && o[-1] != '<' && o[-1] != '.' && |
| 1416 | p[1] != ']' && p[1] != '>' && p[1] != '.') |
| 1417 | *p = '_'; |
| 1418 | #endif /* VMS4_4 */ |
| 1419 | *o++ = *p++; |
| 1420 | } |
| 1421 | #else /* not VMS */ |
| 1422 | if (*p != '/') |
| 1423 | { |
| 1424 | *o++ = *p++; |
| 1425 | } |
| 1426 | else if (!strncmp (p, "//", 2) |
| 1427 | #ifdef APOLLO |
| 1428 | /* // at start of filename is meaningful in Apollo system */ |
| 1429 | && o != target |
| 1430 | #endif /* APOLLO */ |
| 1431 | ) |
| 1432 | { |
| 1433 | o = target; |
| 1434 | p++; |
| 1435 | } |
| 1436 | else if (p[0] == '/' && p[1] == '.' && |
| 1437 | (p[2] == '/' || p[2] == 0)) |
| 1438 | p += 2; |
| 1439 | else if (!strncmp (p, "/..", 3) |
| 1440 | /* `/../' is the "superroot" on certain file systems. */ |
| 1441 | && o != target |
| 1442 | && (p[3] == '/' || p[3] == 0)) |
| 1443 | { |
| 1444 | while (o != target && *--o != '/') |
| 1445 | ; |
| 1446 | #ifdef APOLLO |
| 1447 | if (o == target + 1 && o[-1] == '/' && o[0] == '/') |
| 1448 | ++o; |
| 1449 | else |
| 1450 | #endif /* APOLLO */ |
| 1451 | if (o == target && *o == '/') |
| 1452 | ++o; |
| 1453 | p += 3; |
| 1454 | } |
| 1455 | else |
| 1456 | { |
| 1457 | *o++ = *p++; |
| 1458 | } |
| 1459 | #endif /* not VMS */ |
| 1460 | } |
| 1461 | |
| 1462 | return make_string (target, o - target); |
| 1463 | } |
| 1464 | #endif |
| 1465 | \f |
| 1466 | DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name, |
| 1467 | Ssubstitute_in_file_name, 1, 1, 0, |
| 1468 | "Substitute environment variables referred to in FILENAME.\n\ |
| 1469 | `$FOO' where FOO is an environment variable name means to substitute\n\ |
| 1470 | the value of that variable. The variable name should be terminated\n\ |
| 1471 | with a character not a letter, digit or underscore; otherwise, enclose\n\ |
| 1472 | the entire variable name in braces.\n\ |
| 1473 | If `/~' appears, all of FILENAME through that `/' is discarded.\n\n\ |
| 1474 | On VMS, `$' substitution is not done; this function does little and only\n\ |
| 1475 | duplicates what `expand-file-name' does.") |
| 1476 | (string) |
| 1477 | Lisp_Object string; |
| 1478 | { |
| 1479 | unsigned char *nm; |
| 1480 | |
| 1481 | register unsigned char *s, *p, *o, *x, *endp; |
| 1482 | unsigned char *target; |
| 1483 | int total = 0; |
| 1484 | int substituted = 0; |
| 1485 | unsigned char *xnm; |
| 1486 | |
| 1487 | CHECK_STRING (string, 0); |
| 1488 | |
| 1489 | nm = XSTRING (string)->data; |
| 1490 | endp = nm + XSTRING (string)->size; |
| 1491 | |
| 1492 | /* If /~ or // appears, discard everything through first slash. */ |
| 1493 | |
| 1494 | for (p = nm; p != endp; p++) |
| 1495 | { |
| 1496 | if ((p[0] == '~' || |
| 1497 | #ifdef APOLLO |
| 1498 | /* // at start of file name is meaningful in Apollo system */ |
| 1499 | (p[0] == '/' && p - 1 != nm) |
| 1500 | #else /* not APOLLO */ |
| 1501 | p[0] == '/' |
| 1502 | #endif /* not APOLLO */ |
| 1503 | ) |
| 1504 | && p != nm && |
| 1505 | #ifdef VMS |
| 1506 | (p[-1] == ':' || p[-1] == ']' || p[-1] == '>' || |
| 1507 | #endif /* VMS */ |
| 1508 | p[-1] == '/') |
| 1509 | #ifdef VMS |
| 1510 | ) |
| 1511 | #endif /* VMS */ |
| 1512 | { |
| 1513 | nm = p; |
| 1514 | substituted = 1; |
| 1515 | } |
| 1516 | #ifdef MSDOS |
| 1517 | if (p[0] && p[1] == ':') |
| 1518 | { |
| 1519 | nm = p; |
| 1520 | substituted = 1; |
| 1521 | } |
| 1522 | #endif /* MSDOS */ |
| 1523 | } |
| 1524 | |
| 1525 | #ifdef VMS |
| 1526 | return build_string (nm); |
| 1527 | #else |
| 1528 | |
| 1529 | /* See if any variables are substituted into the string |
| 1530 | and find the total length of their values in `total' */ |
| 1531 | |
| 1532 | for (p = nm; p != endp;) |
| 1533 | if (*p != '$') |
| 1534 | p++; |
| 1535 | else |
| 1536 | { |
| 1537 | p++; |
| 1538 | if (p == endp) |
| 1539 | goto badsubst; |
| 1540 | else if (*p == '$') |
| 1541 | { |
| 1542 | /* "$$" means a single "$" */ |
| 1543 | p++; |
| 1544 | total -= 1; |
| 1545 | substituted = 1; |
| 1546 | continue; |
| 1547 | } |
| 1548 | else if (*p == '{') |
| 1549 | { |
| 1550 | o = ++p; |
| 1551 | while (p != endp && *p != '}') p++; |
| 1552 | if (*p != '}') goto missingclose; |
| 1553 | s = p; |
| 1554 | } |
| 1555 | else |
| 1556 | { |
| 1557 | o = p; |
| 1558 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1559 | s = p; |
| 1560 | } |
| 1561 | |
| 1562 | /* Copy out the variable name */ |
| 1563 | target = (unsigned char *) alloca (s - o + 1); |
| 1564 | strncpy (target, o, s - o); |
| 1565 | target[s - o] = 0; |
| 1566 | #ifdef MSDOS |
| 1567 | strupr (target); /* $home == $HOME etc. */ |
| 1568 | #endif |
| 1569 | |
| 1570 | /* Get variable value */ |
| 1571 | o = (unsigned char *) egetenv (target); |
| 1572 | if (!o) goto badvar; |
| 1573 | total += strlen (o); |
| 1574 | substituted = 1; |
| 1575 | } |
| 1576 | |
| 1577 | if (!substituted) |
| 1578 | return string; |
| 1579 | |
| 1580 | /* If substitution required, recopy the string and do it */ |
| 1581 | /* Make space in stack frame for the new copy */ |
| 1582 | xnm = (unsigned char *) alloca (XSTRING (string)->size + total + 1); |
| 1583 | x = xnm; |
| 1584 | |
| 1585 | /* Copy the rest of the name through, replacing $ constructs with values */ |
| 1586 | for (p = nm; *p;) |
| 1587 | if (*p != '$') |
| 1588 | *x++ = *p++; |
| 1589 | else |
| 1590 | { |
| 1591 | p++; |
| 1592 | if (p == endp) |
| 1593 | goto badsubst; |
| 1594 | else if (*p == '$') |
| 1595 | { |
| 1596 | *x++ = *p++; |
| 1597 | continue; |
| 1598 | } |
| 1599 | else if (*p == '{') |
| 1600 | { |
| 1601 | o = ++p; |
| 1602 | while (p != endp && *p != '}') p++; |
| 1603 | if (*p != '}') goto missingclose; |
| 1604 | s = p++; |
| 1605 | } |
| 1606 | else |
| 1607 | { |
| 1608 | o = p; |
| 1609 | while (p != endp && (isalnum (*p) || *p == '_')) p++; |
| 1610 | s = p; |
| 1611 | } |
| 1612 | |
| 1613 | /* Copy out the variable name */ |
| 1614 | target = (unsigned char *) alloca (s - o + 1); |
| 1615 | strncpy (target, o, s - o); |
| 1616 | target[s - o] = 0; |
| 1617 | #ifdef MSDOS |
| 1618 | strupr (target); /* $home == $HOME etc. */ |
| 1619 | #endif |
| 1620 | |
| 1621 | /* Get variable value */ |
| 1622 | o = (unsigned char *) egetenv (target); |
| 1623 | if (!o) |
| 1624 | goto badvar; |
| 1625 | |
| 1626 | strcpy (x, o); |
| 1627 | x += strlen (o); |
| 1628 | } |
| 1629 | |
| 1630 | *x = 0; |
| 1631 | |
| 1632 | /* If /~ or // appears, discard everything through first slash. */ |
| 1633 | |
| 1634 | for (p = xnm; p != x; p++) |
| 1635 | if ((p[0] == '~' || |
| 1636 | #ifdef APOLLO |
| 1637 | /* // at start of file name is meaningful in Apollo system */ |
| 1638 | (p[0] == '/' && p - 1 != xnm) |
| 1639 | #else /* not APOLLO */ |
| 1640 | p[0] == '/' |
| 1641 | #endif /* not APOLLO */ |
| 1642 | ) |
| 1643 | && p != nm && p[-1] == '/') |
| 1644 | xnm = p; |
| 1645 | #ifdef MSDOS |
| 1646 | else if (p[0] && p[1] == ':') |
| 1647 | xnm = p; |
| 1648 | #endif |
| 1649 | |
| 1650 | return make_string (xnm, x - xnm); |
| 1651 | |
| 1652 | badsubst: |
| 1653 | error ("Bad format environment-variable substitution"); |
| 1654 | missingclose: |
| 1655 | error ("Missing \"}\" in environment-variable substitution"); |
| 1656 | badvar: |
| 1657 | error ("Substituting nonexistent environment variable \"%s\"", target); |
| 1658 | |
| 1659 | /* NOTREACHED */ |
| 1660 | #endif /* not VMS */ |
| 1661 | } |
| 1662 | \f |
| 1663 | /* A slightly faster and more convenient way to get |
| 1664 | (directory-file-name (expand-file-name FOO)). */ |
| 1665 | |
| 1666 | Lisp_Object |
| 1667 | expand_and_dir_to_file (filename, defdir) |
| 1668 | Lisp_Object filename, defdir; |
| 1669 | { |
| 1670 | register Lisp_Object abspath; |
| 1671 | |
| 1672 | abspath = Fexpand_file_name (filename, defdir); |
| 1673 | #ifdef VMS |
| 1674 | { |
| 1675 | register int c = XSTRING (abspath)->data[XSTRING (abspath)->size - 1]; |
| 1676 | if (c == ':' || c == ']' || c == '>') |
| 1677 | abspath = Fdirectory_file_name (abspath); |
| 1678 | } |
| 1679 | #else |
| 1680 | /* Remove final slash, if any (unless path is root). |
| 1681 | stat behaves differently depending! */ |
| 1682 | if (XSTRING (abspath)->size > 1 |
| 1683 | && XSTRING (abspath)->data[XSTRING (abspath)->size - 1] == '/') |
| 1684 | /* We cannot take shortcuts; they might be wrong for magic file names. */ |
| 1685 | abspath = Fdirectory_file_name (abspath); |
| 1686 | #endif |
| 1687 | return abspath; |
| 1688 | } |
| 1689 | \f |
| 1690 | barf_or_query_if_file_exists (absname, querystring, interactive) |
| 1691 | Lisp_Object absname; |
| 1692 | unsigned char *querystring; |
| 1693 | int interactive; |
| 1694 | { |
| 1695 | register Lisp_Object tem; |
| 1696 | struct gcpro gcpro1; |
| 1697 | |
| 1698 | if (access (XSTRING (absname)->data, 4) >= 0) |
| 1699 | { |
| 1700 | if (! interactive) |
| 1701 | Fsignal (Qfile_already_exists, |
| 1702 | Fcons (build_string ("File already exists"), |
| 1703 | Fcons (absname, Qnil))); |
| 1704 | GCPRO1 (absname); |
| 1705 | tem = do_yes_or_no_p (format1 ("File %s already exists; %s anyway? ", |
| 1706 | XSTRING (absname)->data, querystring)); |
| 1707 | UNGCPRO; |
| 1708 | if (NILP (tem)) |
| 1709 | Fsignal (Qfile_already_exists, |
| 1710 | Fcons (build_string ("File already exists"), |
| 1711 | Fcons (absname, Qnil))); |
| 1712 | } |
| 1713 | return; |
| 1714 | } |
| 1715 | |
| 1716 | DEFUN ("copy-file", Fcopy_file, Scopy_file, 2, 4, |
| 1717 | "fCopy file: \nFCopy %s to file: \np\nP", |
| 1718 | "Copy FILE to NEWNAME. Both args must be strings.\n\ |
| 1719 | Signals a `file-already-exists' error if file NEWNAME already exists,\n\ |
| 1720 | unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.\n\ |
| 1721 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1722 | This is what happens in interactive use with M-x.\n\ |
| 1723 | Fourth arg KEEP-TIME non-nil means give the new file the same\n\ |
| 1724 | last-modified time as the old one. (This works on only some systems.)\n\ |
| 1725 | A prefix arg makes KEEP-TIME non-nil.") |
| 1726 | (filename, newname, ok_if_already_exists, keep_date) |
| 1727 | Lisp_Object filename, newname, ok_if_already_exists, keep_date; |
| 1728 | { |
| 1729 | int ifd, ofd, n; |
| 1730 | char buf[16 * 1024]; |
| 1731 | struct stat st; |
| 1732 | Lisp_Object handler; |
| 1733 | struct gcpro gcpro1, gcpro2; |
| 1734 | int count = specpdl_ptr - specpdl; |
| 1735 | Lisp_Object args[6]; |
| 1736 | int input_file_statable_p; |
| 1737 | |
| 1738 | GCPRO2 (filename, newname); |
| 1739 | CHECK_STRING (filename, 0); |
| 1740 | CHECK_STRING (newname, 1); |
| 1741 | filename = Fexpand_file_name (filename, Qnil); |
| 1742 | newname = Fexpand_file_name (newname, Qnil); |
| 1743 | |
| 1744 | /* If the input file name has special constructs in it, |
| 1745 | call the corresponding file handler. */ |
| 1746 | handler = Ffind_file_name_handler (filename, Qcopy_file); |
| 1747 | /* Likewise for output file name. */ |
| 1748 | if (NILP (handler)) |
| 1749 | handler = Ffind_file_name_handler (newname, Qcopy_file); |
| 1750 | if (!NILP (handler)) |
| 1751 | RETURN_UNGCPRO (call5 (handler, Qcopy_file, filename, newname, |
| 1752 | ok_if_already_exists, keep_date)); |
| 1753 | |
| 1754 | if (NILP (ok_if_already_exists) |
| 1755 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1756 | barf_or_query_if_file_exists (newname, "copy to it", |
| 1757 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1758 | |
| 1759 | ifd = open (XSTRING (filename)->data, 0); |
| 1760 | if (ifd < 0) |
| 1761 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 1762 | |
| 1763 | record_unwind_protect (close_file_unwind, make_number (ifd)); |
| 1764 | |
| 1765 | /* We can only copy regular files and symbolic links. Other files are not |
| 1766 | copyable by us. */ |
| 1767 | input_file_statable_p = (fstat (ifd, &st) >= 0); |
| 1768 | |
| 1769 | #if defined (S_ISREG) && defined (S_ISLNK) |
| 1770 | if (input_file_statable_p) |
| 1771 | { |
| 1772 | if (!(S_ISREG (st.st_mode)) && !(S_ISLNK (st.st_mode))) |
| 1773 | { |
| 1774 | #if defined (EISDIR) |
| 1775 | /* Get a better looking error message. */ |
| 1776 | errno = EISDIR; |
| 1777 | #endif /* EISDIR */ |
| 1778 | report_file_error ("Non-regular file", Fcons (filename, Qnil)); |
| 1779 | } |
| 1780 | } |
| 1781 | #endif /* S_ISREG && S_ISLNK */ |
| 1782 | |
| 1783 | #ifdef VMS |
| 1784 | /* Create the copy file with the same record format as the input file */ |
| 1785 | ofd = sys_creat (XSTRING (newname)->data, 0666, ifd); |
| 1786 | #else |
| 1787 | #ifdef MSDOS |
| 1788 | /* System's default file type was set to binary by _fmode in emacs.c. */ |
| 1789 | ofd = creat (XSTRING (newname)->data, S_IREAD | S_IWRITE); |
| 1790 | #else /* not MSDOS */ |
| 1791 | ofd = creat (XSTRING (newname)->data, 0666); |
| 1792 | #endif /* not MSDOS */ |
| 1793 | #endif /* VMS */ |
| 1794 | if (ofd < 0) |
| 1795 | report_file_error ("Opening output file", Fcons (newname, Qnil)); |
| 1796 | |
| 1797 | record_unwind_protect (close_file_unwind, make_number (ofd)); |
| 1798 | |
| 1799 | immediate_quit = 1; |
| 1800 | QUIT; |
| 1801 | while ((n = read (ifd, buf, sizeof buf)) > 0) |
| 1802 | if (write (ofd, buf, n) != n) |
| 1803 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1804 | immediate_quit = 0; |
| 1805 | |
| 1806 | /* Closing the output clobbers the file times on some systems. */ |
| 1807 | if (close (ofd) < 0) |
| 1808 | report_file_error ("I/O error", Fcons (newname, Qnil)); |
| 1809 | |
| 1810 | if (input_file_statable_p) |
| 1811 | { |
| 1812 | if (!NILP (keep_date)) |
| 1813 | { |
| 1814 | EMACS_TIME atime, mtime; |
| 1815 | EMACS_SET_SECS_USECS (atime, st.st_atime, 0); |
| 1816 | EMACS_SET_SECS_USECS (mtime, st.st_mtime, 0); |
| 1817 | EMACS_SET_UTIMES (XSTRING (newname)->data, atime, mtime); |
| 1818 | } |
| 1819 | #ifdef APOLLO |
| 1820 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 1821 | #endif |
| 1822 | chmod (XSTRING (newname)->data, st.st_mode & 07777); |
| 1823 | } |
| 1824 | |
| 1825 | close (ifd); |
| 1826 | |
| 1827 | /* Discard the unwind protects. */ |
| 1828 | specpdl_ptr = specpdl + count; |
| 1829 | |
| 1830 | UNGCPRO; |
| 1831 | return Qnil; |
| 1832 | } |
| 1833 | |
| 1834 | DEFUN ("make-directory-internal", Fmake_directory_internal, |
| 1835 | Smake_directory_internal, 1, 1, 0, |
| 1836 | "Create a directory. One argument, a file name string.") |
| 1837 | (dirname) |
| 1838 | Lisp_Object dirname; |
| 1839 | { |
| 1840 | unsigned char *dir; |
| 1841 | Lisp_Object handler; |
| 1842 | |
| 1843 | CHECK_STRING (dirname, 0); |
| 1844 | dirname = Fexpand_file_name (dirname, Qnil); |
| 1845 | |
| 1846 | handler = Ffind_file_name_handler (dirname, Qmake_directory); |
| 1847 | if (!NILP (handler)) |
| 1848 | return call3 (handler, Qmake_directory, dirname, Qnil); |
| 1849 | |
| 1850 | dir = XSTRING (dirname)->data; |
| 1851 | |
| 1852 | if (mkdir (dir, 0777) != 0) |
| 1853 | report_file_error ("Creating directory", Flist (1, &dirname)); |
| 1854 | |
| 1855 | return Qnil; |
| 1856 | } |
| 1857 | |
| 1858 | DEFUN ("delete-directory", Fdelete_directory, Sdelete_directory, 1, 1, "FDelete directory: ", |
| 1859 | "Delete a directory. One argument, a file name or directory name string.") |
| 1860 | (dirname) |
| 1861 | Lisp_Object dirname; |
| 1862 | { |
| 1863 | unsigned char *dir; |
| 1864 | Lisp_Object handler; |
| 1865 | |
| 1866 | CHECK_STRING (dirname, 0); |
| 1867 | dirname = Fdirectory_file_name (Fexpand_file_name (dirname, Qnil)); |
| 1868 | dir = XSTRING (dirname)->data; |
| 1869 | |
| 1870 | handler = Ffind_file_name_handler (dirname, Qdelete_directory); |
| 1871 | if (!NILP (handler)) |
| 1872 | return call2 (handler, Qdelete_directory, dirname); |
| 1873 | |
| 1874 | if (rmdir (dir) != 0) |
| 1875 | report_file_error ("Removing directory", Flist (1, &dirname)); |
| 1876 | |
| 1877 | return Qnil; |
| 1878 | } |
| 1879 | |
| 1880 | DEFUN ("delete-file", Fdelete_file, Sdelete_file, 1, 1, "fDelete file: ", |
| 1881 | "Delete specified file. One argument, a file name string.\n\ |
| 1882 | If file has multiple names, it continues to exist with the other names.") |
| 1883 | (filename) |
| 1884 | Lisp_Object filename; |
| 1885 | { |
| 1886 | Lisp_Object handler; |
| 1887 | CHECK_STRING (filename, 0); |
| 1888 | filename = Fexpand_file_name (filename, Qnil); |
| 1889 | |
| 1890 | handler = Ffind_file_name_handler (filename, Qdelete_file); |
| 1891 | if (!NILP (handler)) |
| 1892 | return call2 (handler, Qdelete_file, filename); |
| 1893 | |
| 1894 | if (0 > unlink (XSTRING (filename)->data)) |
| 1895 | report_file_error ("Removing old name", Flist (1, &filename)); |
| 1896 | return Qnil; |
| 1897 | } |
| 1898 | |
| 1899 | DEFUN ("rename-file", Frename_file, Srename_file, 2, 3, |
| 1900 | "fRename file: \nFRename %s to file: \np", |
| 1901 | "Rename FILE as NEWNAME. Both args strings.\n\ |
| 1902 | If file has names other than FILE, it continues to have those names.\n\ |
| 1903 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1904 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1905 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1906 | This is what happens in interactive use with M-x.") |
| 1907 | (filename, newname, ok_if_already_exists) |
| 1908 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1909 | { |
| 1910 | #ifdef NO_ARG_ARRAY |
| 1911 | Lisp_Object args[2]; |
| 1912 | #endif |
| 1913 | Lisp_Object handler; |
| 1914 | struct gcpro gcpro1, gcpro2; |
| 1915 | |
| 1916 | GCPRO2 (filename, newname); |
| 1917 | CHECK_STRING (filename, 0); |
| 1918 | CHECK_STRING (newname, 1); |
| 1919 | filename = Fexpand_file_name (filename, Qnil); |
| 1920 | newname = Fexpand_file_name (newname, Qnil); |
| 1921 | |
| 1922 | /* If the file name has special constructs in it, |
| 1923 | call the corresponding file handler. */ |
| 1924 | handler = Ffind_file_name_handler (filename, Qrename_file); |
| 1925 | if (NILP (handler)) |
| 1926 | handler = Ffind_file_name_handler (newname, Qrename_file); |
| 1927 | if (!NILP (handler)) |
| 1928 | RETURN_UNGCPRO (call4 (handler, Qrename_file, |
| 1929 | filename, newname, ok_if_already_exists)); |
| 1930 | |
| 1931 | if (NILP (ok_if_already_exists) |
| 1932 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1933 | barf_or_query_if_file_exists (newname, "rename to it", |
| 1934 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1935 | #ifndef BSD4_1 |
| 1936 | if (0 > rename (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 1937 | #else |
| 1938 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data) |
| 1939 | || 0 > unlink (XSTRING (filename)->data)) |
| 1940 | #endif |
| 1941 | { |
| 1942 | if (errno == EXDEV) |
| 1943 | { |
| 1944 | Fcopy_file (filename, newname, |
| 1945 | /* We have already prompted if it was an integer, |
| 1946 | so don't have copy-file prompt again. */ |
| 1947 | NILP (ok_if_already_exists) ? Qnil : Qt, Qt); |
| 1948 | Fdelete_file (filename); |
| 1949 | } |
| 1950 | else |
| 1951 | #ifdef NO_ARG_ARRAY |
| 1952 | { |
| 1953 | args[0] = filename; |
| 1954 | args[1] = newname; |
| 1955 | report_file_error ("Renaming", Flist (2, args)); |
| 1956 | } |
| 1957 | #else |
| 1958 | report_file_error ("Renaming", Flist (2, &filename)); |
| 1959 | #endif |
| 1960 | } |
| 1961 | UNGCPRO; |
| 1962 | return Qnil; |
| 1963 | } |
| 1964 | |
| 1965 | DEFUN ("add-name-to-file", Fadd_name_to_file, Sadd_name_to_file, 2, 3, |
| 1966 | "fAdd name to file: \nFName to add to %s: \np", |
| 1967 | "Give FILE additional name NEWNAME. Both args strings.\n\ |
| 1968 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 1969 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 1970 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 1971 | This is what happens in interactive use with M-x.") |
| 1972 | (filename, newname, ok_if_already_exists) |
| 1973 | Lisp_Object filename, newname, ok_if_already_exists; |
| 1974 | { |
| 1975 | #ifdef NO_ARG_ARRAY |
| 1976 | Lisp_Object args[2]; |
| 1977 | #endif |
| 1978 | Lisp_Object handler; |
| 1979 | struct gcpro gcpro1, gcpro2; |
| 1980 | |
| 1981 | GCPRO2 (filename, newname); |
| 1982 | CHECK_STRING (filename, 0); |
| 1983 | CHECK_STRING (newname, 1); |
| 1984 | filename = Fexpand_file_name (filename, Qnil); |
| 1985 | newname = Fexpand_file_name (newname, Qnil); |
| 1986 | |
| 1987 | /* If the file name has special constructs in it, |
| 1988 | call the corresponding file handler. */ |
| 1989 | handler = Ffind_file_name_handler (filename, Qadd_name_to_file); |
| 1990 | if (!NILP (handler)) |
| 1991 | RETURN_UNGCPRO (call4 (handler, Qadd_name_to_file, filename, |
| 1992 | newname, ok_if_already_exists)); |
| 1993 | |
| 1994 | if (NILP (ok_if_already_exists) |
| 1995 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 1996 | barf_or_query_if_file_exists (newname, "make it a new name", |
| 1997 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 1998 | unlink (XSTRING (newname)->data); |
| 1999 | if (0 > link (XSTRING (filename)->data, XSTRING (newname)->data)) |
| 2000 | { |
| 2001 | #ifdef NO_ARG_ARRAY |
| 2002 | args[0] = filename; |
| 2003 | args[1] = newname; |
| 2004 | report_file_error ("Adding new name", Flist (2, args)); |
| 2005 | #else |
| 2006 | report_file_error ("Adding new name", Flist (2, &filename)); |
| 2007 | #endif |
| 2008 | } |
| 2009 | |
| 2010 | UNGCPRO; |
| 2011 | return Qnil; |
| 2012 | } |
| 2013 | |
| 2014 | #ifdef S_IFLNK |
| 2015 | DEFUN ("make-symbolic-link", Fmake_symbolic_link, Smake_symbolic_link, 2, 3, |
| 2016 | "FMake symbolic link to file: \nFMake symbolic link to file %s: \np", |
| 2017 | "Make a symbolic link to FILENAME, named LINKNAME. Both args strings.\n\ |
| 2018 | Signals a `file-already-exists' error if a file NEWNAME already exists\n\ |
| 2019 | unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.\n\ |
| 2020 | A number as third arg means request confirmation if NEWNAME already exists.\n\ |
| 2021 | This happens for interactive use with M-x.") |
| 2022 | (filename, linkname, ok_if_already_exists) |
| 2023 | Lisp_Object filename, linkname, ok_if_already_exists; |
| 2024 | { |
| 2025 | #ifdef NO_ARG_ARRAY |
| 2026 | Lisp_Object args[2]; |
| 2027 | #endif |
| 2028 | Lisp_Object handler; |
| 2029 | struct gcpro gcpro1, gcpro2; |
| 2030 | |
| 2031 | GCPRO2 (filename, linkname); |
| 2032 | CHECK_STRING (filename, 0); |
| 2033 | CHECK_STRING (linkname, 1); |
| 2034 | /* If the link target has a ~, we must expand it to get |
| 2035 | a truly valid file name. Otherwise, do not expand; |
| 2036 | we want to permit links to relative file names. */ |
| 2037 | if (XSTRING (filename)->data[0] == '~') |
| 2038 | filename = Fexpand_file_name (filename, Qnil); |
| 2039 | linkname = Fexpand_file_name (linkname, Qnil); |
| 2040 | |
| 2041 | /* If the file name has special constructs in it, |
| 2042 | call the corresponding file handler. */ |
| 2043 | handler = Ffind_file_name_handler (filename, Qmake_symbolic_link); |
| 2044 | if (!NILP (handler)) |
| 2045 | RETURN_UNGCPRO (call4 (handler, Qmake_symbolic_link, filename, |
| 2046 | linkname, ok_if_already_exists)); |
| 2047 | |
| 2048 | if (NILP (ok_if_already_exists) |
| 2049 | || XTYPE (ok_if_already_exists) == Lisp_Int) |
| 2050 | barf_or_query_if_file_exists (linkname, "make it a link", |
| 2051 | XTYPE (ok_if_already_exists) == Lisp_Int); |
| 2052 | if (0 > symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 2053 | { |
| 2054 | /* If we didn't complain already, silently delete existing file. */ |
| 2055 | if (errno == EEXIST) |
| 2056 | { |
| 2057 | unlink (XSTRING (linkname)->data); |
| 2058 | if (0 <= symlink (XSTRING (filename)->data, XSTRING (linkname)->data)) |
| 2059 | return Qnil; |
| 2060 | } |
| 2061 | |
| 2062 | #ifdef NO_ARG_ARRAY |
| 2063 | args[0] = filename; |
| 2064 | args[1] = linkname; |
| 2065 | report_file_error ("Making symbolic link", Flist (2, args)); |
| 2066 | #else |
| 2067 | report_file_error ("Making symbolic link", Flist (2, &filename)); |
| 2068 | #endif |
| 2069 | } |
| 2070 | UNGCPRO; |
| 2071 | return Qnil; |
| 2072 | } |
| 2073 | #endif /* S_IFLNK */ |
| 2074 | |
| 2075 | #ifdef VMS |
| 2076 | |
| 2077 | DEFUN ("define-logical-name", Fdefine_logical_name, Sdefine_logical_name, |
| 2078 | 2, 2, "sDefine logical name: \nsDefine logical name %s as: ", |
| 2079 | "Define the job-wide logical name NAME to have the value STRING.\n\ |
| 2080 | If STRING is nil or a null string, the logical name NAME is deleted.") |
| 2081 | (varname, string) |
| 2082 | Lisp_Object varname; |
| 2083 | Lisp_Object string; |
| 2084 | { |
| 2085 | CHECK_STRING (varname, 0); |
| 2086 | if (NILP (string)) |
| 2087 | delete_logical_name (XSTRING (varname)->data); |
| 2088 | else |
| 2089 | { |
| 2090 | CHECK_STRING (string, 1); |
| 2091 | |
| 2092 | if (XSTRING (string)->size == 0) |
| 2093 | delete_logical_name (XSTRING (varname)->data); |
| 2094 | else |
| 2095 | define_logical_name (XSTRING (varname)->data, XSTRING (string)->data); |
| 2096 | } |
| 2097 | |
| 2098 | return string; |
| 2099 | } |
| 2100 | #endif /* VMS */ |
| 2101 | |
| 2102 | #ifdef HPUX_NET |
| 2103 | |
| 2104 | DEFUN ("sysnetunam", Fsysnetunam, Ssysnetunam, 2, 2, 0, |
| 2105 | "Open a network connection to PATH using LOGIN as the login string.") |
| 2106 | (path, login) |
| 2107 | Lisp_Object path, login; |
| 2108 | { |
| 2109 | int netresult; |
| 2110 | |
| 2111 | CHECK_STRING (path, 0); |
| 2112 | CHECK_STRING (login, 0); |
| 2113 | |
| 2114 | netresult = netunam (XSTRING (path)->data, XSTRING (login)->data); |
| 2115 | |
| 2116 | if (netresult == -1) |
| 2117 | return Qnil; |
| 2118 | else |
| 2119 | return Qt; |
| 2120 | } |
| 2121 | #endif /* HPUX_NET */ |
| 2122 | \f |
| 2123 | DEFUN ("file-name-absolute-p", Ffile_name_absolute_p, Sfile_name_absolute_p, |
| 2124 | 1, 1, 0, |
| 2125 | "Return t if file FILENAME specifies an absolute path name.\n\ |
| 2126 | On Unix, this is a name starting with a `/' or a `~'.") |
| 2127 | (filename) |
| 2128 | Lisp_Object filename; |
| 2129 | { |
| 2130 | unsigned char *ptr; |
| 2131 | |
| 2132 | CHECK_STRING (filename, 0); |
| 2133 | ptr = XSTRING (filename)->data; |
| 2134 | if (*ptr == '/' || *ptr == '~' |
| 2135 | #ifdef VMS |
| 2136 | /* ??? This criterion is probably wrong for '<'. */ |
| 2137 | || index (ptr, ':') || index (ptr, '<') |
| 2138 | || (*ptr == '[' && (ptr[1] != '-' || (ptr[2] != '.' && ptr[2] != ']')) |
| 2139 | && ptr[1] != '.') |
| 2140 | #endif /* VMS */ |
| 2141 | #ifdef MSDOS |
| 2142 | || (*ptr != 0 && ptr[1] == ':' && ptr[2] == '/') |
| 2143 | #endif |
| 2144 | ) |
| 2145 | return Qt; |
| 2146 | else |
| 2147 | return Qnil; |
| 2148 | } |
| 2149 | |
| 2150 | DEFUN ("file-exists-p", Ffile_exists_p, Sfile_exists_p, 1, 1, 0, |
| 2151 | "Return t if file FILENAME exists. (This does not mean you can read it.)\n\ |
| 2152 | See also `file-readable-p' and `file-attributes'.") |
| 2153 | (filename) |
| 2154 | Lisp_Object filename; |
| 2155 | { |
| 2156 | Lisp_Object abspath; |
| 2157 | Lisp_Object handler; |
| 2158 | |
| 2159 | CHECK_STRING (filename, 0); |
| 2160 | abspath = Fexpand_file_name (filename, Qnil); |
| 2161 | |
| 2162 | /* If the file name has special constructs in it, |
| 2163 | call the corresponding file handler. */ |
| 2164 | handler = Ffind_file_name_handler (abspath, Qfile_exists_p); |
| 2165 | if (!NILP (handler)) |
| 2166 | return call2 (handler, Qfile_exists_p, abspath); |
| 2167 | |
| 2168 | return (access (XSTRING (abspath)->data, 0) >= 0) ? Qt : Qnil; |
| 2169 | } |
| 2170 | |
| 2171 | DEFUN ("file-executable-p", Ffile_executable_p, Sfile_executable_p, 1, 1, 0, |
| 2172 | "Return t if FILENAME can be executed by you.\n\ |
| 2173 | For a directory, this means you can access files in that directory.") |
| 2174 | (filename) |
| 2175 | Lisp_Object filename; |
| 2176 | |
| 2177 | { |
| 2178 | Lisp_Object abspath; |
| 2179 | Lisp_Object handler; |
| 2180 | |
| 2181 | CHECK_STRING (filename, 0); |
| 2182 | abspath = Fexpand_file_name (filename, Qnil); |
| 2183 | |
| 2184 | /* If the file name has special constructs in it, |
| 2185 | call the corresponding file handler. */ |
| 2186 | handler = Ffind_file_name_handler (abspath, Qfile_executable_p); |
| 2187 | if (!NILP (handler)) |
| 2188 | return call2 (handler, Qfile_executable_p, abspath); |
| 2189 | |
| 2190 | return (access (XSTRING (abspath)->data, 1) >= 0) ? Qt : Qnil; |
| 2191 | } |
| 2192 | |
| 2193 | DEFUN ("file-readable-p", Ffile_readable_p, Sfile_readable_p, 1, 1, 0, |
| 2194 | "Return t if file FILENAME exists and you can read it.\n\ |
| 2195 | See also `file-exists-p' and `file-attributes'.") |
| 2196 | (filename) |
| 2197 | Lisp_Object filename; |
| 2198 | { |
| 2199 | Lisp_Object abspath; |
| 2200 | Lisp_Object handler; |
| 2201 | |
| 2202 | CHECK_STRING (filename, 0); |
| 2203 | abspath = Fexpand_file_name (filename, Qnil); |
| 2204 | |
| 2205 | /* If the file name has special constructs in it, |
| 2206 | call the corresponding file handler. */ |
| 2207 | handler = Ffind_file_name_handler (abspath, Qfile_readable_p); |
| 2208 | if (!NILP (handler)) |
| 2209 | return call2 (handler, Qfile_readable_p, abspath); |
| 2210 | |
| 2211 | return (access (XSTRING (abspath)->data, 4) >= 0) ? Qt : Qnil; |
| 2212 | } |
| 2213 | |
| 2214 | DEFUN ("file-symlink-p", Ffile_symlink_p, Sfile_symlink_p, 1, 1, 0, |
| 2215 | "Return non-nil if file FILENAME is the name of a symbolic link.\n\ |
| 2216 | The value is the name of the file to which it is linked.\n\ |
| 2217 | Otherwise returns nil.") |
| 2218 | (filename) |
| 2219 | Lisp_Object filename; |
| 2220 | { |
| 2221 | #ifdef S_IFLNK |
| 2222 | char *buf; |
| 2223 | int bufsize; |
| 2224 | int valsize; |
| 2225 | Lisp_Object val; |
| 2226 | Lisp_Object handler; |
| 2227 | |
| 2228 | CHECK_STRING (filename, 0); |
| 2229 | filename = Fexpand_file_name (filename, Qnil); |
| 2230 | |
| 2231 | /* If the file name has special constructs in it, |
| 2232 | call the corresponding file handler. */ |
| 2233 | handler = Ffind_file_name_handler (filename, Qfile_symlink_p); |
| 2234 | if (!NILP (handler)) |
| 2235 | return call2 (handler, Qfile_symlink_p, filename); |
| 2236 | |
| 2237 | bufsize = 100; |
| 2238 | while (1) |
| 2239 | { |
| 2240 | buf = (char *) xmalloc (bufsize); |
| 2241 | bzero (buf, bufsize); |
| 2242 | valsize = readlink (XSTRING (filename)->data, buf, bufsize); |
| 2243 | if (valsize < bufsize) break; |
| 2244 | /* Buffer was not long enough */ |
| 2245 | xfree (buf); |
| 2246 | bufsize *= 2; |
| 2247 | } |
| 2248 | if (valsize == -1) |
| 2249 | { |
| 2250 | xfree (buf); |
| 2251 | return Qnil; |
| 2252 | } |
| 2253 | val = make_string (buf, valsize); |
| 2254 | xfree (buf); |
| 2255 | return val; |
| 2256 | #else /* not S_IFLNK */ |
| 2257 | return Qnil; |
| 2258 | #endif /* not S_IFLNK */ |
| 2259 | } |
| 2260 | |
| 2261 | #ifdef SOLARIS_BROKEN_ACCESS |
| 2262 | /* In Solaris 2.1, the readonly-ness of the filesystem is not |
| 2263 | considered by the access system call. This is Sun's bug, but we |
| 2264 | still have to make Emacs work. */ |
| 2265 | |
| 2266 | #include <sys/statvfs.h> |
| 2267 | |
| 2268 | static int |
| 2269 | ro_fsys (path) |
| 2270 | char *path; |
| 2271 | { |
| 2272 | struct statvfs statvfsb; |
| 2273 | |
| 2274 | if (statvfs(path, &statvfsb)) |
| 2275 | return 1; /* error from statvfs, be conservative and say not wrtable */ |
| 2276 | else |
| 2277 | /* Otherwise, fsys is ro if bit is set. */ |
| 2278 | return statvfsb.f_flag & ST_RDONLY; |
| 2279 | } |
| 2280 | #else |
| 2281 | /* But on every other os, access has already done the right thing. */ |
| 2282 | #define ro_fsys(path) 0 |
| 2283 | #endif |
| 2284 | |
| 2285 | /* Having this before file-symlink-p mysteriously caused it to be forgotten |
| 2286 | on the RT/PC. */ |
| 2287 | DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0, |
| 2288 | "Return t if file FILENAME can be written or created by you.") |
| 2289 | (filename) |
| 2290 | Lisp_Object filename; |
| 2291 | { |
| 2292 | Lisp_Object abspath, dir; |
| 2293 | Lisp_Object handler; |
| 2294 | |
| 2295 | CHECK_STRING (filename, 0); |
| 2296 | abspath = Fexpand_file_name (filename, Qnil); |
| 2297 | |
| 2298 | /* If the file name has special constructs in it, |
| 2299 | call the corresponding file handler. */ |
| 2300 | handler = Ffind_file_name_handler (abspath, Qfile_writable_p); |
| 2301 | if (!NILP (handler)) |
| 2302 | return call2 (handler, Qfile_writable_p, abspath); |
| 2303 | |
| 2304 | if (access (XSTRING (abspath)->data, 0) >= 0) |
| 2305 | return ((access (XSTRING (abspath)->data, 2) >= 0 |
| 2306 | && ! ro_fsys ((char *) XSTRING (abspath)->data)) |
| 2307 | ? Qt : Qnil); |
| 2308 | dir = Ffile_name_directory (abspath); |
| 2309 | #ifdef VMS |
| 2310 | if (!NILP (dir)) |
| 2311 | dir = Fdirectory_file_name (dir); |
| 2312 | #endif /* VMS */ |
| 2313 | #ifdef MSDOS |
| 2314 | if (!NILP (dir)) |
| 2315 | dir = Fdirectory_file_name (dir); |
| 2316 | #endif /* MSDOS */ |
| 2317 | return ((access (!NILP (dir) ? (char *) XSTRING (dir)->data : "", 2) >= 0 |
| 2318 | && ! ro_fsys ((char *) XSTRING (dir)->data)) |
| 2319 | ? Qt : Qnil); |
| 2320 | } |
| 2321 | |
| 2322 | DEFUN ("file-directory-p", Ffile_directory_p, Sfile_directory_p, 1, 1, 0, |
| 2323 | "Return t if file FILENAME is the name of a directory as a file.\n\ |
| 2324 | A directory name spec may be given instead; then the value is t\n\ |
| 2325 | if the directory so specified exists and really is a directory.") |
| 2326 | (filename) |
| 2327 | Lisp_Object filename; |
| 2328 | { |
| 2329 | register Lisp_Object abspath; |
| 2330 | struct stat st; |
| 2331 | Lisp_Object handler; |
| 2332 | |
| 2333 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2334 | |
| 2335 | /* If the file name has special constructs in it, |
| 2336 | call the corresponding file handler. */ |
| 2337 | handler = Ffind_file_name_handler (abspath, Qfile_directory_p); |
| 2338 | if (!NILP (handler)) |
| 2339 | return call2 (handler, Qfile_directory_p, abspath); |
| 2340 | |
| 2341 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2342 | return Qnil; |
| 2343 | return (st.st_mode & S_IFMT) == S_IFDIR ? Qt : Qnil; |
| 2344 | } |
| 2345 | |
| 2346 | DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p, Sfile_accessible_directory_p, 1, 1, 0, |
| 2347 | "Return t if file FILENAME is the name of a directory as a file,\n\ |
| 2348 | and files in that directory can be opened by you. In order to use a\n\ |
| 2349 | directory as a buffer's current directory, this predicate must return true.\n\ |
| 2350 | A directory name spec may be given instead; then the value is t\n\ |
| 2351 | if the directory so specified exists and really is a readable and\n\ |
| 2352 | searchable directory.") |
| 2353 | (filename) |
| 2354 | Lisp_Object filename; |
| 2355 | { |
| 2356 | Lisp_Object handler; |
| 2357 | |
| 2358 | /* If the file name has special constructs in it, |
| 2359 | call the corresponding file handler. */ |
| 2360 | handler = Ffind_file_name_handler (filename, Qfile_accessible_directory_p); |
| 2361 | if (!NILP (handler)) |
| 2362 | return call2 (handler, Qfile_accessible_directory_p, filename); |
| 2363 | |
| 2364 | if (NILP (Ffile_directory_p (filename)) |
| 2365 | || NILP (Ffile_executable_p (filename))) |
| 2366 | return Qnil; |
| 2367 | else |
| 2368 | return Qt; |
| 2369 | } |
| 2370 | |
| 2371 | DEFUN ("file-modes", Ffile_modes, Sfile_modes, 1, 1, 0, |
| 2372 | "Return mode bits of FILE, as an integer.") |
| 2373 | (filename) |
| 2374 | Lisp_Object filename; |
| 2375 | { |
| 2376 | Lisp_Object abspath; |
| 2377 | struct stat st; |
| 2378 | Lisp_Object handler; |
| 2379 | |
| 2380 | abspath = expand_and_dir_to_file (filename, current_buffer->directory); |
| 2381 | |
| 2382 | /* If the file name has special constructs in it, |
| 2383 | call the corresponding file handler. */ |
| 2384 | handler = Ffind_file_name_handler (abspath, Qfile_modes); |
| 2385 | if (!NILP (handler)) |
| 2386 | return call2 (handler, Qfile_modes, abspath); |
| 2387 | |
| 2388 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2389 | return Qnil; |
| 2390 | #ifdef MSDOS |
| 2391 | { |
| 2392 | int len; |
| 2393 | char *suffix; |
| 2394 | if (S_ISREG (st.st_mode) |
| 2395 | && (len = XSTRING (abspath)->size) >= 5 |
| 2396 | && (stricmp ((suffix = XSTRING (abspath)->data + len-4), ".com") == 0 |
| 2397 | || stricmp (suffix, ".exe") == 0 |
| 2398 | || stricmp (suffix, ".bat") == 0)) |
| 2399 | st.st_mode |= S_IEXEC; |
| 2400 | } |
| 2401 | #endif /* MSDOS */ |
| 2402 | |
| 2403 | return make_number (st.st_mode & 07777); |
| 2404 | } |
| 2405 | |
| 2406 | DEFUN ("set-file-modes", Fset_file_modes, Sset_file_modes, 2, 2, 0, |
| 2407 | "Set mode bits of FILE to MODE (an integer).\n\ |
| 2408 | Only the 12 low bits of MODE are used.") |
| 2409 | (filename, mode) |
| 2410 | Lisp_Object filename, mode; |
| 2411 | { |
| 2412 | Lisp_Object abspath; |
| 2413 | Lisp_Object handler; |
| 2414 | |
| 2415 | abspath = Fexpand_file_name (filename, current_buffer->directory); |
| 2416 | CHECK_NUMBER (mode, 1); |
| 2417 | |
| 2418 | /* If the file name has special constructs in it, |
| 2419 | call the corresponding file handler. */ |
| 2420 | handler = Ffind_file_name_handler (abspath, Qset_file_modes); |
| 2421 | if (!NILP (handler)) |
| 2422 | return call3 (handler, Qset_file_modes, abspath, mode); |
| 2423 | |
| 2424 | #ifndef APOLLO |
| 2425 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2426 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2427 | #else /* APOLLO */ |
| 2428 | if (!egetenv ("USE_DOMAIN_ACLS")) |
| 2429 | { |
| 2430 | struct stat st; |
| 2431 | struct timeval tvp[2]; |
| 2432 | |
| 2433 | /* chmod on apollo also change the file's modtime; need to save the |
| 2434 | modtime and then restore it. */ |
| 2435 | if (stat (XSTRING (abspath)->data, &st) < 0) |
| 2436 | { |
| 2437 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2438 | return (Qnil); |
| 2439 | } |
| 2440 | |
| 2441 | if (chmod (XSTRING (abspath)->data, XINT (mode)) < 0) |
| 2442 | report_file_error ("Doing chmod", Fcons (abspath, Qnil)); |
| 2443 | |
| 2444 | /* reset the old accessed and modified times. */ |
| 2445 | tvp[0].tv_sec = st.st_atime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2446 | tvp[0].tv_usec = 0; |
| 2447 | tvp[1].tv_sec = st.st_mtime + 1; /* +1 due to an Apollo roundoff bug */ |
| 2448 | tvp[1].tv_usec = 0; |
| 2449 | |
| 2450 | if (utimes (XSTRING (abspath)->data, tvp) < 0) |
| 2451 | report_file_error ("Doing utimes", Fcons (abspath, Qnil)); |
| 2452 | } |
| 2453 | #endif /* APOLLO */ |
| 2454 | |
| 2455 | return Qnil; |
| 2456 | } |
| 2457 | |
| 2458 | DEFUN ("set-default-file-modes", Fset_default_file_modes, Sset_default_file_modes, 1, 1, 0, |
| 2459 | "Set the file permission bits for newly created files.\n\ |
| 2460 | The argument MODE should be an integer; only the low 9 bits are used.\n\ |
| 2461 | This setting is inherited by subprocesses.") |
| 2462 | (mode) |
| 2463 | Lisp_Object mode; |
| 2464 | { |
| 2465 | CHECK_NUMBER (mode, 0); |
| 2466 | |
| 2467 | umask ((~ XINT (mode)) & 0777); |
| 2468 | |
| 2469 | return Qnil; |
| 2470 | } |
| 2471 | |
| 2472 | DEFUN ("default-file-modes", Fdefault_file_modes, Sdefault_file_modes, 0, 0, 0, |
| 2473 | "Return the default file protection for created files.\n\ |
| 2474 | The value is an integer.") |
| 2475 | () |
| 2476 | { |
| 2477 | int realmask; |
| 2478 | Lisp_Object value; |
| 2479 | |
| 2480 | realmask = umask (0); |
| 2481 | umask (realmask); |
| 2482 | |
| 2483 | XSET (value, Lisp_Int, (~ realmask) & 0777); |
| 2484 | return value; |
| 2485 | } |
| 2486 | |
| 2487 | #ifdef unix |
| 2488 | |
| 2489 | DEFUN ("unix-sync", Funix_sync, Sunix_sync, 0, 0, "", |
| 2490 | "Tell Unix to finish all pending disk updates.") |
| 2491 | () |
| 2492 | { |
| 2493 | sync (); |
| 2494 | return Qnil; |
| 2495 | } |
| 2496 | |
| 2497 | #endif /* unix */ |
| 2498 | |
| 2499 | DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p, Sfile_newer_than_file_p, 2, 2, 0, |
| 2500 | "Return t if file FILE1 is newer than file FILE2.\n\ |
| 2501 | If FILE1 does not exist, the answer is nil;\n\ |
| 2502 | otherwise, if FILE2 does not exist, the answer is t.") |
| 2503 | (file1, file2) |
| 2504 | Lisp_Object file1, file2; |
| 2505 | { |
| 2506 | Lisp_Object abspath1, abspath2; |
| 2507 | struct stat st; |
| 2508 | int mtime1; |
| 2509 | Lisp_Object handler; |
| 2510 | struct gcpro gcpro1, gcpro2; |
| 2511 | |
| 2512 | CHECK_STRING (file1, 0); |
| 2513 | CHECK_STRING (file2, 0); |
| 2514 | |
| 2515 | abspath1 = Qnil; |
| 2516 | GCPRO2 (abspath1, file2); |
| 2517 | abspath1 = expand_and_dir_to_file (file1, current_buffer->directory); |
| 2518 | abspath2 = expand_and_dir_to_file (file2, current_buffer->directory); |
| 2519 | UNGCPRO; |
| 2520 | |
| 2521 | /* If the file name has special constructs in it, |
| 2522 | call the corresponding file handler. */ |
| 2523 | handler = Ffind_file_name_handler (abspath1, Qfile_newer_than_file_p); |
| 2524 | if (NILP (handler)) |
| 2525 | handler = Ffind_file_name_handler (abspath2, Qfile_newer_than_file_p); |
| 2526 | if (!NILP (handler)) |
| 2527 | return call3 (handler, Qfile_newer_than_file_p, abspath1, abspath2); |
| 2528 | |
| 2529 | if (stat (XSTRING (abspath1)->data, &st) < 0) |
| 2530 | return Qnil; |
| 2531 | |
| 2532 | mtime1 = st.st_mtime; |
| 2533 | |
| 2534 | if (stat (XSTRING (abspath2)->data, &st) < 0) |
| 2535 | return Qt; |
| 2536 | |
| 2537 | return (mtime1 > st.st_mtime) ? Qt : Qnil; |
| 2538 | } |
| 2539 | \f |
| 2540 | #ifdef MSDOS |
| 2541 | Lisp_Object Qfind_buffer_file_type; |
| 2542 | #endif |
| 2543 | |
| 2544 | DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents, |
| 2545 | 1, 5, 0, |
| 2546 | "Insert contents of file FILENAME after point.\n\ |
| 2547 | Returns list of absolute file name and length of data inserted.\n\ |
| 2548 | If second argument VISIT is non-nil, the buffer's visited filename\n\ |
| 2549 | and last save file modtime are set, and it is marked unmodified.\n\ |
| 2550 | If visiting and the file does not exist, visiting is completed\n\ |
| 2551 | before the error is signaled.\n\n\ |
| 2552 | The optional third and fourth arguments BEG and END\n\ |
| 2553 | specify what portion of the file to insert.\n\ |
| 2554 | If VISIT is non-nil, BEG and END must be nil.\n\ |
| 2555 | If optional fifth argument REPLACE is non-nil,\n\ |
| 2556 | it means replace the current buffer contents (in the accessible portion)\n\ |
| 2557 | with the file contents. This is better than simply deleting and inserting\n\ |
| 2558 | the whole thing because (1) it preserves some marker positions\n\ |
| 2559 | and (2) it puts less data in the undo list.") |
| 2560 | (filename, visit, beg, end, replace) |
| 2561 | Lisp_Object filename, visit, beg, end, replace; |
| 2562 | { |
| 2563 | struct stat st; |
| 2564 | register int fd; |
| 2565 | register int inserted = 0; |
| 2566 | register int how_much; |
| 2567 | int count = specpdl_ptr - specpdl; |
| 2568 | struct gcpro gcpro1, gcpro2; |
| 2569 | Lisp_Object handler, val, insval; |
| 2570 | Lisp_Object p; |
| 2571 | int total; |
| 2572 | |
| 2573 | val = Qnil; |
| 2574 | p = Qnil; |
| 2575 | |
| 2576 | GCPRO2 (filename, p); |
| 2577 | if (!NILP (current_buffer->read_only)) |
| 2578 | Fbarf_if_buffer_read_only(); |
| 2579 | |
| 2580 | CHECK_STRING (filename, 0); |
| 2581 | filename = Fexpand_file_name (filename, Qnil); |
| 2582 | |
| 2583 | /* If the file name has special constructs in it, |
| 2584 | call the corresponding file handler. */ |
| 2585 | handler = Ffind_file_name_handler (filename, Qinsert_file_contents); |
| 2586 | if (!NILP (handler)) |
| 2587 | { |
| 2588 | val = call6 (handler, Qinsert_file_contents, filename, |
| 2589 | visit, beg, end, replace); |
| 2590 | goto handled; |
| 2591 | } |
| 2592 | |
| 2593 | fd = -1; |
| 2594 | |
| 2595 | #ifndef APOLLO |
| 2596 | if (stat (XSTRING (filename)->data, &st) < 0 |
| 2597 | || (fd = open (XSTRING (filename)->data, 0)) < 0) |
| 2598 | #else |
| 2599 | if ((fd = open (XSTRING (filename)->data, 0)) < 0 |
| 2600 | || fstat (fd, &st) < 0) |
| 2601 | #endif /* not APOLLO */ |
| 2602 | { |
| 2603 | if (fd >= 0) close (fd); |
| 2604 | if (NILP (visit)) |
| 2605 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2606 | st.st_mtime = -1; |
| 2607 | how_much = 0; |
| 2608 | goto notfound; |
| 2609 | } |
| 2610 | |
| 2611 | /* Replacement should preserve point as it preserves markers. */ |
| 2612 | if (!NILP (replace)) |
| 2613 | record_unwind_protect (restore_point_unwind, Fpoint_marker ()); |
| 2614 | |
| 2615 | record_unwind_protect (close_file_unwind, make_number (fd)); |
| 2616 | |
| 2617 | #ifdef S_IFSOCK |
| 2618 | /* This code will need to be changed in order to work on named |
| 2619 | pipes, and it's probably just not worth it. So we should at |
| 2620 | least signal an error. */ |
| 2621 | if ((st.st_mode & S_IFMT) == S_IFSOCK) |
| 2622 | Fsignal (Qfile_error, |
| 2623 | Fcons (build_string ("reading from named pipe"), |
| 2624 | Fcons (filename, Qnil))); |
| 2625 | #endif |
| 2626 | |
| 2627 | /* Supposedly happens on VMS. */ |
| 2628 | if (st.st_size < 0) |
| 2629 | error ("File size is negative"); |
| 2630 | |
| 2631 | if (!NILP (beg) || !NILP (end)) |
| 2632 | if (!NILP (visit)) |
| 2633 | error ("Attempt to visit less than an entire file"); |
| 2634 | |
| 2635 | if (!NILP (beg)) |
| 2636 | CHECK_NUMBER (beg, 0); |
| 2637 | else |
| 2638 | XFASTINT (beg) = 0; |
| 2639 | |
| 2640 | if (!NILP (end)) |
| 2641 | CHECK_NUMBER (end, 0); |
| 2642 | else |
| 2643 | { |
| 2644 | XSETINT (end, st.st_size); |
| 2645 | if (XINT (end) != st.st_size) |
| 2646 | error ("maximum buffer size exceeded"); |
| 2647 | } |
| 2648 | |
| 2649 | /* If requested, replace the accessible part of the buffer |
| 2650 | with the file contents. Avoid replacing text at the |
| 2651 | beginning or end of the buffer that matches the file contents; |
| 2652 | that preserves markers pointing to the unchanged parts. */ |
| 2653 | #ifdef MSDOS |
| 2654 | /* On MSDOS, replace mode doesn't really work, except for binary files, |
| 2655 | and it's not worth supporting just for them. */ |
| 2656 | if (!NILP (replace)) |
| 2657 | { |
| 2658 | replace = Qnil; |
| 2659 | XFASTINT (beg) = 0; |
| 2660 | XFASTINT (end) = st.st_size; |
| 2661 | del_range_1 (BEGV, ZV, 0); |
| 2662 | } |
| 2663 | #else /* MSDOS */ |
| 2664 | if (!NILP (replace)) |
| 2665 | { |
| 2666 | unsigned char buffer[1 << 14]; |
| 2667 | int same_at_start = BEGV; |
| 2668 | int same_at_end = ZV; |
| 2669 | int overlap; |
| 2670 | |
| 2671 | immediate_quit = 1; |
| 2672 | QUIT; |
| 2673 | /* Count how many chars at the start of the file |
| 2674 | match the text at the beginning of the buffer. */ |
| 2675 | while (1) |
| 2676 | { |
| 2677 | int nread, bufpos; |
| 2678 | |
| 2679 | nread = read (fd, buffer, sizeof buffer); |
| 2680 | if (nread < 0) |
| 2681 | error ("IO error reading %s: %s", |
| 2682 | XSTRING (filename)->data, strerror (errno)); |
| 2683 | else if (nread == 0) |
| 2684 | break; |
| 2685 | bufpos = 0; |
| 2686 | while (bufpos < nread && same_at_start < ZV |
| 2687 | && FETCH_CHAR (same_at_start) == buffer[bufpos]) |
| 2688 | same_at_start++, bufpos++; |
| 2689 | /* If we found a discrepancy, stop the scan. |
| 2690 | Otherwise loop around and scan the next bufferfull. */ |
| 2691 | if (bufpos != nread) |
| 2692 | break; |
| 2693 | } |
| 2694 | immediate_quit = 0; |
| 2695 | /* If the file matches the buffer completely, |
| 2696 | there's no need to replace anything. */ |
| 2697 | if (same_at_start - BEGV == st.st_size) |
| 2698 | { |
| 2699 | close (fd); |
| 2700 | specpdl_ptr--; |
| 2701 | /* Truncate the buffer to the size of the file. */ |
| 2702 | del_range_1 (same_at_start, same_at_end, 0); |
| 2703 | goto handled; |
| 2704 | } |
| 2705 | immediate_quit = 1; |
| 2706 | QUIT; |
| 2707 | /* Count how many chars at the end of the file |
| 2708 | match the text at the end of the buffer. */ |
| 2709 | while (1) |
| 2710 | { |
| 2711 | int total_read, nread, bufpos, curpos, trial; |
| 2712 | |
| 2713 | /* At what file position are we now scanning? */ |
| 2714 | curpos = st.st_size - (ZV - same_at_end); |
| 2715 | /* How much can we scan in the next step? */ |
| 2716 | trial = min (curpos, sizeof buffer); |
| 2717 | if (lseek (fd, curpos - trial, 0) < 0) |
| 2718 | report_file_error ("Setting file position", |
| 2719 | Fcons (filename, Qnil)); |
| 2720 | |
| 2721 | total_read = 0; |
| 2722 | while (total_read < trial) |
| 2723 | { |
| 2724 | nread = read (fd, buffer + total_read, trial - total_read); |
| 2725 | if (nread <= 0) |
| 2726 | error ("IO error reading %s: %s", |
| 2727 | XSTRING (filename)->data, strerror (errno)); |
| 2728 | total_read += nread; |
| 2729 | } |
| 2730 | /* Scan this bufferfull from the end, comparing with |
| 2731 | the Emacs buffer. */ |
| 2732 | bufpos = total_read; |
| 2733 | /* Compare with same_at_start to avoid counting some buffer text |
| 2734 | as matching both at the file's beginning and at the end. */ |
| 2735 | while (bufpos > 0 && same_at_end > same_at_start |
| 2736 | && FETCH_CHAR (same_at_end - 1) == buffer[bufpos - 1]) |
| 2737 | same_at_end--, bufpos--; |
| 2738 | /* If we found a discrepancy, stop the scan. |
| 2739 | Otherwise loop around and scan the preceding bufferfull. */ |
| 2740 | if (bufpos != 0) |
| 2741 | break; |
| 2742 | } |
| 2743 | immediate_quit = 0; |
| 2744 | |
| 2745 | /* Don't try to reuse the same piece of text twice. */ |
| 2746 | overlap = same_at_start - BEGV - (same_at_end + st.st_size - ZV); |
| 2747 | if (overlap > 0) |
| 2748 | same_at_end += overlap; |
| 2749 | |
| 2750 | /* Arrange to read only the nonmatching middle part of the file. */ |
| 2751 | XFASTINT (beg) = same_at_start - BEGV; |
| 2752 | XFASTINT (end) = st.st_size - (ZV - same_at_end); |
| 2753 | |
| 2754 | del_range_1 (same_at_start, same_at_end, 0); |
| 2755 | /* Insert from the file at the proper position. */ |
| 2756 | SET_PT (same_at_start); |
| 2757 | } |
| 2758 | #endif /* MSDOS */ |
| 2759 | |
| 2760 | total = XINT (end) - XINT (beg); |
| 2761 | |
| 2762 | { |
| 2763 | register Lisp_Object temp; |
| 2764 | |
| 2765 | /* Make sure point-max won't overflow after this insertion. */ |
| 2766 | XSET (temp, Lisp_Int, total); |
| 2767 | if (total != XINT (temp)) |
| 2768 | error ("maximum buffer size exceeded"); |
| 2769 | } |
| 2770 | |
| 2771 | if (NILP (visit) && total > 0) |
| 2772 | prepare_to_modify_buffer (point, point); |
| 2773 | |
| 2774 | move_gap (point); |
| 2775 | if (GAP_SIZE < total) |
| 2776 | make_gap (total - GAP_SIZE); |
| 2777 | |
| 2778 | if (XINT (beg) != 0 || !NILP (replace)) |
| 2779 | { |
| 2780 | if (lseek (fd, XINT (beg), 0) < 0) |
| 2781 | report_file_error ("Setting file position", Fcons (filename, Qnil)); |
| 2782 | } |
| 2783 | |
| 2784 | how_much = 0; |
| 2785 | while (inserted < total) |
| 2786 | { |
| 2787 | int try = min (total - inserted, 64 << 10); |
| 2788 | int this; |
| 2789 | |
| 2790 | /* Allow quitting out of the actual I/O. */ |
| 2791 | immediate_quit = 1; |
| 2792 | QUIT; |
| 2793 | this = read (fd, &FETCH_CHAR (point + inserted - 1) + 1, try); |
| 2794 | immediate_quit = 0; |
| 2795 | |
| 2796 | if (this <= 0) |
| 2797 | { |
| 2798 | how_much = this; |
| 2799 | break; |
| 2800 | } |
| 2801 | |
| 2802 | GPT += this; |
| 2803 | GAP_SIZE -= this; |
| 2804 | ZV += this; |
| 2805 | Z += this; |
| 2806 | inserted += this; |
| 2807 | } |
| 2808 | |
| 2809 | #ifdef MSDOS |
| 2810 | /* Demacs 1.1.1 91/10/16 HIRANO Satoshi, MW July 1993 */ |
| 2811 | /* Determine file type from name and remove LFs from CR-LFs if the file |
| 2812 | is deemed to be a text file. */ |
| 2813 | { |
| 2814 | struct gcpro gcpro1; |
| 2815 | Lisp_Object code; |
| 2816 | code = Qnil; |
| 2817 | GCPRO1 (filename); |
| 2818 | current_buffer->buffer_file_type |
| 2819 | = call1 (Qfind_buffer_file_type, filename); |
| 2820 | UNGCPRO; |
| 2821 | if (NILP (current_buffer->buffer_file_type)) |
| 2822 | { |
| 2823 | int reduced_size |
| 2824 | = inserted - crlf_to_lf (inserted, &FETCH_CHAR (point - 1) + 1); |
| 2825 | ZV -= reduced_size; |
| 2826 | Z -= reduced_size; |
| 2827 | GPT -= reduced_size; |
| 2828 | GAP_SIZE += reduced_size; |
| 2829 | inserted -= reduced_size; |
| 2830 | } |
| 2831 | } |
| 2832 | #endif |
| 2833 | |
| 2834 | if (inserted > 0) |
| 2835 | { |
| 2836 | record_insert (point, inserted); |
| 2837 | |
| 2838 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
| 2839 | offset_intervals (current_buffer, point, inserted); |
| 2840 | MODIFF++; |
| 2841 | } |
| 2842 | |
| 2843 | close (fd); |
| 2844 | |
| 2845 | /* Discard the unwind protect for closing the file. */ |
| 2846 | specpdl_ptr--; |
| 2847 | |
| 2848 | if (how_much < 0) |
| 2849 | error ("IO error reading %s: %s", |
| 2850 | XSTRING (filename)->data, strerror (errno)); |
| 2851 | |
| 2852 | notfound: |
| 2853 | handled: |
| 2854 | |
| 2855 | if (!NILP (visit)) |
| 2856 | { |
| 2857 | if (!EQ (current_buffer->undo_list, Qt)) |
| 2858 | current_buffer->undo_list = Qnil; |
| 2859 | #ifdef APOLLO |
| 2860 | stat (XSTRING (filename)->data, &st); |
| 2861 | #endif |
| 2862 | |
| 2863 | if (NILP (handler)) |
| 2864 | { |
| 2865 | current_buffer->modtime = st.st_mtime; |
| 2866 | current_buffer->filename = filename; |
| 2867 | } |
| 2868 | |
| 2869 | current_buffer->save_modified = MODIFF; |
| 2870 | current_buffer->auto_save_modified = MODIFF; |
| 2871 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2872 | #ifdef CLASH_DETECTION |
| 2873 | if (NILP (handler)) |
| 2874 | { |
| 2875 | if (!NILP (current_buffer->filename)) |
| 2876 | unlock_file (current_buffer->filename); |
| 2877 | unlock_file (filename); |
| 2878 | } |
| 2879 | #endif /* CLASH_DETECTION */ |
| 2880 | /* If visiting nonexistent file, return nil. */ |
| 2881 | if (current_buffer->modtime == -1) |
| 2882 | report_file_error ("Opening input file", Fcons (filename, Qnil)); |
| 2883 | } |
| 2884 | |
| 2885 | if (inserted > 0 && NILP (visit) && total > 0) |
| 2886 | signal_after_change (point, 0, inserted); |
| 2887 | |
| 2888 | if (inserted > 0) |
| 2889 | { |
| 2890 | p = Vafter_insert_file_functions; |
| 2891 | while (!NILP (p)) |
| 2892 | { |
| 2893 | insval = call1 (Fcar (p), make_number (inserted)); |
| 2894 | if (!NILP (insval)) |
| 2895 | { |
| 2896 | CHECK_NUMBER (insval, 0); |
| 2897 | inserted = XFASTINT (insval); |
| 2898 | } |
| 2899 | QUIT; |
| 2900 | p = Fcdr (p); |
| 2901 | } |
| 2902 | } |
| 2903 | |
| 2904 | if (NILP (val)) |
| 2905 | val = Fcons (filename, |
| 2906 | Fcons (make_number (inserted), |
| 2907 | Qnil)); |
| 2908 | |
| 2909 | RETURN_UNGCPRO (unbind_to (count, val)); |
| 2910 | } |
| 2911 | \f |
| 2912 | static Lisp_Object build_annotations (); |
| 2913 | |
| 2914 | DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 5, |
| 2915 | "r\nFWrite region to file: ", |
| 2916 | "Write current region into specified file.\n\ |
| 2917 | When called from a program, takes three arguments:\n\ |
| 2918 | START, END and FILENAME. START and END are buffer positions.\n\ |
| 2919 | Optional fourth argument APPEND if non-nil means\n\ |
| 2920 | append to existing file contents (if any).\n\ |
| 2921 | Optional fifth argument VISIT if t means\n\ |
| 2922 | set the last-save-file-modtime of buffer to this file's modtime\n\ |
| 2923 | and mark buffer not modified.\n\ |
| 2924 | If VISIT is a string, it is a second file name;\n\ |
| 2925 | the output goes to FILENAME, but the buffer is marked as visiting VISIT.\n\ |
| 2926 | VISIT is also the file name to lock and unlock for clash detection.\n\ |
| 2927 | If VISIT is neither t nor nil nor a string,\n\ |
| 2928 | that means do not print the \"Wrote file\" message.\n\ |
| 2929 | Kludgy feature: if START is a string, then that string is written\n\ |
| 2930 | to the file, instead of any buffer contents, and END is ignored.") |
| 2931 | (start, end, filename, append, visit) |
| 2932 | Lisp_Object start, end, filename, append, visit; |
| 2933 | { |
| 2934 | register int desc; |
| 2935 | int failure; |
| 2936 | int save_errno; |
| 2937 | unsigned char *fn; |
| 2938 | struct stat st; |
| 2939 | int tem; |
| 2940 | int count = specpdl_ptr - specpdl; |
| 2941 | #ifdef VMS |
| 2942 | unsigned char *fname = 0; /* If non-0, original filename (must rename) */ |
| 2943 | #endif /* VMS */ |
| 2944 | Lisp_Object handler; |
| 2945 | Lisp_Object visit_file; |
| 2946 | Lisp_Object annotations; |
| 2947 | int visiting, quietly; |
| 2948 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2949 | #ifdef MSDOS |
| 2950 | int buffer_file_type |
| 2951 | = NILP (current_buffer->buffer_file_type) ? O_TEXT : O_BINARY; |
| 2952 | #endif |
| 2953 | |
| 2954 | if (!NILP (start) && !STRINGP (start)) |
| 2955 | validate_region (&start, &end); |
| 2956 | |
| 2957 | filename = Fexpand_file_name (filename, Qnil); |
| 2958 | if (STRINGP (visit)) |
| 2959 | visit_file = Fexpand_file_name (visit, Qnil); |
| 2960 | else |
| 2961 | visit_file = filename; |
| 2962 | |
| 2963 | visiting = (EQ (visit, Qt) || STRINGP (visit)); |
| 2964 | quietly = !NILP (visit); |
| 2965 | |
| 2966 | annotations = Qnil; |
| 2967 | |
| 2968 | GCPRO4 (start, filename, annotations, visit_file); |
| 2969 | |
| 2970 | /* If the file name has special constructs in it, |
| 2971 | call the corresponding file handler. */ |
| 2972 | handler = Ffind_file_name_handler (filename, Qwrite_region); |
| 2973 | /* If FILENAME has no handler, see if VISIT has one. */ |
| 2974 | if (NILP (handler) && XTYPE (visit) == Lisp_String) |
| 2975 | handler = Ffind_file_name_handler (visit, Qwrite_region); |
| 2976 | |
| 2977 | if (!NILP (handler)) |
| 2978 | { |
| 2979 | Lisp_Object val; |
| 2980 | val = call6 (handler, Qwrite_region, start, end, |
| 2981 | filename, append, visit); |
| 2982 | |
| 2983 | if (visiting) |
| 2984 | { |
| 2985 | current_buffer->save_modified = MODIFF; |
| 2986 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 2987 | current_buffer->filename = visit_file; |
| 2988 | } |
| 2989 | UNGCPRO; |
| 2990 | return val; |
| 2991 | } |
| 2992 | |
| 2993 | /* Special kludge to simplify auto-saving. */ |
| 2994 | if (NILP (start)) |
| 2995 | { |
| 2996 | XFASTINT (start) = BEG; |
| 2997 | XFASTINT (end) = Z; |
| 2998 | } |
| 2999 | |
| 3000 | annotations = build_annotations (start, end); |
| 3001 | |
| 3002 | #ifdef CLASH_DETECTION |
| 3003 | if (!auto_saving) |
| 3004 | lock_file (visit_file); |
| 3005 | #endif /* CLASH_DETECTION */ |
| 3006 | |
| 3007 | fn = XSTRING (filename)->data; |
| 3008 | desc = -1; |
| 3009 | if (!NILP (append)) |
| 3010 | #ifdef MSDOS |
| 3011 | desc = open (fn, O_WRONLY | buffer_file_type); |
| 3012 | #else |
| 3013 | desc = open (fn, O_WRONLY); |
| 3014 | #endif |
| 3015 | |
| 3016 | if (desc < 0) |
| 3017 | #ifdef VMS |
| 3018 | if (auto_saving) /* Overwrite any previous version of autosave file */ |
| 3019 | { |
| 3020 | vms_truncate (fn); /* if fn exists, truncate to zero length */ |
| 3021 | desc = open (fn, O_RDWR); |
| 3022 | if (desc < 0) |
| 3023 | desc = creat_copy_attrs (STRINGP (current_buffer->filename) |
| 3024 | ? XSTRING (current_buffer->filename)->data : 0, |
| 3025 | fn); |
| 3026 | } |
| 3027 | else /* Write to temporary name and rename if no errors */ |
| 3028 | { |
| 3029 | Lisp_Object temp_name; |
| 3030 | temp_name = Ffile_name_directory (filename); |
| 3031 | |
| 3032 | if (!NILP (temp_name)) |
| 3033 | { |
| 3034 | temp_name = Fmake_temp_name (concat2 (temp_name, |
| 3035 | build_string ("$$SAVE$$"))); |
| 3036 | fname = XSTRING (filename)->data; |
| 3037 | fn = XSTRING (temp_name)->data; |
| 3038 | desc = creat_copy_attrs (fname, fn); |
| 3039 | if (desc < 0) |
| 3040 | { |
| 3041 | /* If we can't open the temporary file, try creating a new |
| 3042 | version of the original file. VMS "creat" creates a |
| 3043 | new version rather than truncating an existing file. */ |
| 3044 | fn = fname; |
| 3045 | fname = 0; |
| 3046 | desc = creat (fn, 0666); |
| 3047 | #if 0 /* This can clobber an existing file and fail to replace it, |
| 3048 | if the user runs out of space. */ |
| 3049 | if (desc < 0) |
| 3050 | { |
| 3051 | /* We can't make a new version; |
| 3052 | try to truncate and rewrite existing version if any. */ |
| 3053 | vms_truncate (fn); |
| 3054 | desc = open (fn, O_RDWR); |
| 3055 | } |
| 3056 | #endif |
| 3057 | } |
| 3058 | } |
| 3059 | else |
| 3060 | desc = creat (fn, 0666); |
| 3061 | } |
| 3062 | #else /* not VMS */ |
| 3063 | #ifdef MSDOS |
| 3064 | desc = open (fn, |
| 3065 | O_WRONLY | O_TRUNC | O_CREAT | buffer_file_type, |
| 3066 | S_IREAD | S_IWRITE); |
| 3067 | #else /* not MSDOS */ |
| 3068 | desc = creat (fn, auto_saving ? auto_save_mode_bits : 0666); |
| 3069 | #endif /* not MSDOS */ |
| 3070 | #endif /* not VMS */ |
| 3071 | |
| 3072 | UNGCPRO; |
| 3073 | |
| 3074 | if (desc < 0) |
| 3075 | { |
| 3076 | #ifdef CLASH_DETECTION |
| 3077 | save_errno = errno; |
| 3078 | if (!auto_saving) unlock_file (visit_file); |
| 3079 | errno = save_errno; |
| 3080 | #endif /* CLASH_DETECTION */ |
| 3081 | report_file_error ("Opening output file", Fcons (filename, Qnil)); |
| 3082 | } |
| 3083 | |
| 3084 | record_unwind_protect (close_file_unwind, make_number (desc)); |
| 3085 | |
| 3086 | if (!NILP (append)) |
| 3087 | if (lseek (desc, 0, 2) < 0) |
| 3088 | { |
| 3089 | #ifdef CLASH_DETECTION |
| 3090 | if (!auto_saving) unlock_file (visit_file); |
| 3091 | #endif /* CLASH_DETECTION */ |
| 3092 | report_file_error ("Lseek error", Fcons (filename, Qnil)); |
| 3093 | } |
| 3094 | |
| 3095 | #ifdef VMS |
| 3096 | /* |
| 3097 | * Kludge Warning: The VMS C RTL likes to insert carriage returns |
| 3098 | * if we do writes that don't end with a carriage return. Furthermore |
| 3099 | * it cannot handle writes of more then 16K. The modified |
| 3100 | * version of "sys_write" in SYSDEP.C (see comment there) copes with |
| 3101 | * this EXCEPT for the last record (iff it doesn't end with a carriage |
| 3102 | * return). This implies that if your buffer doesn't end with a carriage |
| 3103 | * return, you get one free... tough. However it also means that if |
| 3104 | * we make two calls to sys_write (a la the following code) you can |
| 3105 | * get one at the gap as well. The easiest way to fix this (honest) |
| 3106 | * is to move the gap to the next newline (or the end of the buffer). |
| 3107 | * Thus this change. |
| 3108 | * |
| 3109 | * Yech! |
| 3110 | */ |
| 3111 | if (GPT > BEG && GPT_ADDR[-1] != '\n') |
| 3112 | move_gap (find_next_newline (GPT, 1)); |
| 3113 | #endif |
| 3114 | |
| 3115 | failure = 0; |
| 3116 | immediate_quit = 1; |
| 3117 | |
| 3118 | if (STRINGP (start)) |
| 3119 | { |
| 3120 | failure = 0 > a_write (desc, XSTRING (start)->data, |
| 3121 | XSTRING (start)->size, 0, &annotations); |
| 3122 | save_errno = errno; |
| 3123 | } |
| 3124 | else if (XINT (start) != XINT (end)) |
| 3125 | { |
| 3126 | int nwritten = 0; |
| 3127 | if (XINT (start) < GPT) |
| 3128 | { |
| 3129 | register int end1 = XINT (end); |
| 3130 | tem = XINT (start); |
| 3131 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), |
| 3132 | min (GPT, end1) - tem, tem, &annotations); |
| 3133 | nwritten += min (GPT, end1) - tem; |
| 3134 | save_errno = errno; |
| 3135 | } |
| 3136 | |
| 3137 | if (XINT (end) > GPT && !failure) |
| 3138 | { |
| 3139 | tem = XINT (start); |
| 3140 | tem = max (tem, GPT); |
| 3141 | failure = 0 > a_write (desc, &FETCH_CHAR (tem), XINT (end) - tem, |
| 3142 | tem, &annotations); |
| 3143 | nwritten += XINT (end) - tem; |
| 3144 | save_errno = errno; |
| 3145 | } |
| 3146 | |
| 3147 | if (nwritten == 0) |
| 3148 | { |
| 3149 | /* If file was empty, still need to write the annotations */ |
| 3150 | failure = 0 > a_write (desc, "", 0, XINT (start), &annotations); |
| 3151 | save_errno = errno; |
| 3152 | } |
| 3153 | } |
| 3154 | |
| 3155 | immediate_quit = 0; |
| 3156 | |
| 3157 | #ifdef HAVE_FSYNC |
| 3158 | /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun). |
| 3159 | Disk full in NFS may be reported here. */ |
| 3160 | /* mib says that closing the file will try to write as fast as NFS can do |
| 3161 | it, and that means the fsync here is not crucial for autosave files. */ |
| 3162 | if (!auto_saving && fsync (desc) < 0) |
| 3163 | failure = 1, save_errno = errno; |
| 3164 | #endif |
| 3165 | |
| 3166 | /* Spurious "file has changed on disk" warnings have been |
| 3167 | observed on Suns as well. |
| 3168 | It seems that `close' can change the modtime, under nfs. |
| 3169 | |
| 3170 | (This has supposedly been fixed in Sunos 4, |
| 3171 | but who knows about all the other machines with NFS?) */ |
| 3172 | #if 0 |
| 3173 | |
| 3174 | /* On VMS and APOLLO, must do the stat after the close |
| 3175 | since closing changes the modtime. */ |
| 3176 | #ifndef VMS |
| 3177 | #ifndef APOLLO |
| 3178 | /* Recall that #if defined does not work on VMS. */ |
| 3179 | #define FOO |
| 3180 | fstat (desc, &st); |
| 3181 | #endif |
| 3182 | #endif |
| 3183 | #endif |
| 3184 | |
| 3185 | /* NFS can report a write failure now. */ |
| 3186 | if (close (desc) < 0) |
| 3187 | failure = 1, save_errno = errno; |
| 3188 | |
| 3189 | #ifdef VMS |
| 3190 | /* If we wrote to a temporary name and had no errors, rename to real name. */ |
| 3191 | if (fname) |
| 3192 | { |
| 3193 | if (!failure) |
| 3194 | failure = (rename (fn, fname) != 0), save_errno = errno; |
| 3195 | fn = fname; |
| 3196 | } |
| 3197 | #endif /* VMS */ |
| 3198 | |
| 3199 | #ifndef FOO |
| 3200 | stat (fn, &st); |
| 3201 | #endif |
| 3202 | /* Discard the unwind protect */ |
| 3203 | specpdl_ptr = specpdl + count; |
| 3204 | |
| 3205 | #ifdef CLASH_DETECTION |
| 3206 | if (!auto_saving) |
| 3207 | unlock_file (visit_file); |
| 3208 | #endif /* CLASH_DETECTION */ |
| 3209 | |
| 3210 | /* Do this before reporting IO error |
| 3211 | to avoid a "file has changed on disk" warning on |
| 3212 | next attempt to save. */ |
| 3213 | if (visiting) |
| 3214 | current_buffer->modtime = st.st_mtime; |
| 3215 | |
| 3216 | if (failure) |
| 3217 | error ("IO error writing %s: %s", fn, strerror (save_errno)); |
| 3218 | |
| 3219 | if (visiting) |
| 3220 | { |
| 3221 | current_buffer->save_modified = MODIFF; |
| 3222 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3223 | current_buffer->filename = visit_file; |
| 3224 | update_mode_lines++; |
| 3225 | } |
| 3226 | else if (quietly) |
| 3227 | return Qnil; |
| 3228 | |
| 3229 | if (!auto_saving) |
| 3230 | message ("Wrote %s", XSTRING (visit_file)->data); |
| 3231 | |
| 3232 | return Qnil; |
| 3233 | } |
| 3234 | |
| 3235 | Lisp_Object merge (); |
| 3236 | |
| 3237 | DEFUN ("car-less-than-car", Fcar_less_than_car, Scar_less_than_car, 2, 2, 0, |
| 3238 | "Return t if (car A) is numerically less than (car B).") |
| 3239 | (a, b) |
| 3240 | Lisp_Object a, b; |
| 3241 | { |
| 3242 | return Flss (Fcar (a), Fcar (b)); |
| 3243 | } |
| 3244 | |
| 3245 | /* Build the complete list of annotations appropriate for writing out |
| 3246 | the text between START and END, by calling all the functions in |
| 3247 | write-region-annotate-functions and merging the lists they return. */ |
| 3248 | |
| 3249 | static Lisp_Object |
| 3250 | build_annotations (start, end) |
| 3251 | Lisp_Object start, end; |
| 3252 | { |
| 3253 | Lisp_Object annotations; |
| 3254 | Lisp_Object p, res; |
| 3255 | struct gcpro gcpro1, gcpro2; |
| 3256 | |
| 3257 | annotations = Qnil; |
| 3258 | p = Vwrite_region_annotate_functions; |
| 3259 | GCPRO2 (annotations, p); |
| 3260 | while (!NILP (p)) |
| 3261 | { |
| 3262 | res = call2 (Fcar (p), start, end); |
| 3263 | Flength (res); /* Check basic validity of return value */ |
| 3264 | annotations = merge (annotations, res, Qcar_less_than_car); |
| 3265 | p = Fcdr (p); |
| 3266 | } |
| 3267 | UNGCPRO; |
| 3268 | return annotations; |
| 3269 | } |
| 3270 | |
| 3271 | /* Write to descriptor DESC the LEN characters starting at ADDR, |
| 3272 | assuming they start at position POS in the buffer. |
| 3273 | Intersperse with them the annotations from *ANNOT |
| 3274 | (those which fall within the range of positions POS to POS + LEN), |
| 3275 | each at its appropriate position. |
| 3276 | |
| 3277 | Modify *ANNOT by discarding elements as we output them. |
| 3278 | The return value is negative in case of system call failure. */ |
| 3279 | |
| 3280 | int |
| 3281 | a_write (desc, addr, len, pos, annot) |
| 3282 | int desc; |
| 3283 | register char *addr; |
| 3284 | register int len; |
| 3285 | int pos; |
| 3286 | Lisp_Object *annot; |
| 3287 | { |
| 3288 | Lisp_Object tem; |
| 3289 | int nextpos; |
| 3290 | int lastpos = pos + len; |
| 3291 | |
| 3292 | while (1) |
| 3293 | { |
| 3294 | tem = Fcar_safe (Fcar (*annot)); |
| 3295 | if (INTEGERP (tem) && XINT (tem) >= pos && XFASTINT (tem) <= lastpos) |
| 3296 | nextpos = XFASTINT (tem); |
| 3297 | else |
| 3298 | return e_write (desc, addr, lastpos - pos); |
| 3299 | if (nextpos > pos) |
| 3300 | { |
| 3301 | if (0 > e_write (desc, addr, nextpos - pos)) |
| 3302 | return -1; |
| 3303 | addr += nextpos - pos; |
| 3304 | pos = nextpos; |
| 3305 | } |
| 3306 | tem = Fcdr (Fcar (*annot)); |
| 3307 | if (STRINGP (tem)) |
| 3308 | { |
| 3309 | if (0 > e_write (desc, XSTRING (tem)->data, XSTRING (tem)->size)) |
| 3310 | return -1; |
| 3311 | } |
| 3312 | *annot = Fcdr (*annot); |
| 3313 | } |
| 3314 | } |
| 3315 | |
| 3316 | int |
| 3317 | e_write (desc, addr, len) |
| 3318 | int desc; |
| 3319 | register char *addr; |
| 3320 | register int len; |
| 3321 | { |
| 3322 | char buf[16 * 1024]; |
| 3323 | register char *p, *end; |
| 3324 | |
| 3325 | if (!EQ (current_buffer->selective_display, Qt)) |
| 3326 | return write (desc, addr, len) - len; |
| 3327 | else |
| 3328 | { |
| 3329 | p = buf; |
| 3330 | end = p + sizeof buf; |
| 3331 | while (len--) |
| 3332 | { |
| 3333 | if (p == end) |
| 3334 | { |
| 3335 | if (write (desc, buf, sizeof buf) != sizeof buf) |
| 3336 | return -1; |
| 3337 | p = buf; |
| 3338 | } |
| 3339 | *p = *addr++; |
| 3340 | if (*p++ == '\015') |
| 3341 | p[-1] = '\n'; |
| 3342 | } |
| 3343 | if (p != buf) |
| 3344 | if (write (desc, buf, p - buf) != p - buf) |
| 3345 | return -1; |
| 3346 | } |
| 3347 | return 0; |
| 3348 | } |
| 3349 | |
| 3350 | DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime, |
| 3351 | Sverify_visited_file_modtime, 1, 1, 0, |
| 3352 | "Return t if last mod time of BUF's visited file matches what BUF records.\n\ |
| 3353 | This means that the file has not been changed since it was visited or saved.") |
| 3354 | (buf) |
| 3355 | Lisp_Object buf; |
| 3356 | { |
| 3357 | struct buffer *b; |
| 3358 | struct stat st; |
| 3359 | Lisp_Object handler; |
| 3360 | |
| 3361 | CHECK_BUFFER (buf, 0); |
| 3362 | b = XBUFFER (buf); |
| 3363 | |
| 3364 | if (XTYPE (b->filename) != Lisp_String) return Qt; |
| 3365 | if (b->modtime == 0) return Qt; |
| 3366 | |
| 3367 | /* If the file name has special constructs in it, |
| 3368 | call the corresponding file handler. */ |
| 3369 | handler = Ffind_file_name_handler (b->filename, |
| 3370 | Qverify_visited_file_modtime); |
| 3371 | if (!NILP (handler)) |
| 3372 | return call2 (handler, Qverify_visited_file_modtime, buf); |
| 3373 | |
| 3374 | if (stat (XSTRING (b->filename)->data, &st) < 0) |
| 3375 | { |
| 3376 | /* If the file doesn't exist now and didn't exist before, |
| 3377 | we say that it isn't modified, provided the error is a tame one. */ |
| 3378 | if (errno == ENOENT || errno == EACCES || errno == ENOTDIR) |
| 3379 | st.st_mtime = -1; |
| 3380 | else |
| 3381 | st.st_mtime = 0; |
| 3382 | } |
| 3383 | if (st.st_mtime == b->modtime |
| 3384 | /* If both are positive, accept them if they are off by one second. */ |
| 3385 | || (st.st_mtime > 0 && b->modtime > 0 |
| 3386 | && (st.st_mtime == b->modtime + 1 |
| 3387 | || st.st_mtime == b->modtime - 1))) |
| 3388 | return Qt; |
| 3389 | return Qnil; |
| 3390 | } |
| 3391 | |
| 3392 | DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime, |
| 3393 | Sclear_visited_file_modtime, 0, 0, 0, |
| 3394 | "Clear out records of last mod time of visited file.\n\ |
| 3395 | Next attempt to save will certainly not complain of a discrepancy.") |
| 3396 | () |
| 3397 | { |
| 3398 | current_buffer->modtime = 0; |
| 3399 | return Qnil; |
| 3400 | } |
| 3401 | |
| 3402 | DEFUN ("visited-file-modtime", Fvisited_file_modtime, |
| 3403 | Svisited_file_modtime, 0, 0, 0, |
| 3404 | "Return the current buffer's recorded visited file modification time.\n\ |
| 3405 | The value is a list of the form (HIGH . LOW), like the time values\n\ |
| 3406 | that `file-attributes' returns.") |
| 3407 | () |
| 3408 | { |
| 3409 | return long_to_cons (current_buffer->modtime); |
| 3410 | } |
| 3411 | |
| 3412 | DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime, |
| 3413 | Sset_visited_file_modtime, 0, 1, 0, |
| 3414 | "Update buffer's recorded modification time from the visited file's time.\n\ |
| 3415 | Useful if the buffer was not read from the file normally\n\ |
| 3416 | or if the file itself has been changed for some known benign reason.\n\ |
| 3417 | An argument specifies the modification time value to use\n\ |
| 3418 | \(instead of that of the visited file), in the form of a list\n\ |
| 3419 | \(HIGH . LOW) or (HIGH LOW).") |
| 3420 | (time_list) |
| 3421 | Lisp_Object time_list; |
| 3422 | { |
| 3423 | if (!NILP (time_list)) |
| 3424 | current_buffer->modtime = cons_to_long (time_list); |
| 3425 | else |
| 3426 | { |
| 3427 | register Lisp_Object filename; |
| 3428 | struct stat st; |
| 3429 | Lisp_Object handler; |
| 3430 | |
| 3431 | filename = Fexpand_file_name (current_buffer->filename, Qnil); |
| 3432 | |
| 3433 | /* If the file name has special constructs in it, |
| 3434 | call the corresponding file handler. */ |
| 3435 | handler = Ffind_file_name_handler (filename, Qset_visited_file_modtime); |
| 3436 | if (!NILP (handler)) |
| 3437 | /* The handler can find the file name the same way we did. */ |
| 3438 | return call2 (handler, Qset_visited_file_modtime, Qnil); |
| 3439 | else if (stat (XSTRING (filename)->data, &st) >= 0) |
| 3440 | current_buffer->modtime = st.st_mtime; |
| 3441 | } |
| 3442 | |
| 3443 | return Qnil; |
| 3444 | } |
| 3445 | \f |
| 3446 | Lisp_Object |
| 3447 | auto_save_error () |
| 3448 | { |
| 3449 | unsigned char *name = XSTRING (current_buffer->name)->data; |
| 3450 | |
| 3451 | ring_bell (); |
| 3452 | message ("Autosaving...error for %s", name); |
| 3453 | Fsleep_for (make_number (1), Qnil); |
| 3454 | message ("Autosaving...error!for %s", name); |
| 3455 | Fsleep_for (make_number (1), Qnil); |
| 3456 | message ("Autosaving...error for %s", name); |
| 3457 | Fsleep_for (make_number (1), Qnil); |
| 3458 | return Qnil; |
| 3459 | } |
| 3460 | |
| 3461 | Lisp_Object |
| 3462 | auto_save_1 () |
| 3463 | { |
| 3464 | unsigned char *fn; |
| 3465 | struct stat st; |
| 3466 | |
| 3467 | /* Get visited file's mode to become the auto save file's mode. */ |
| 3468 | if (stat (XSTRING (current_buffer->filename)->data, &st) >= 0) |
| 3469 | /* But make sure we can overwrite it later! */ |
| 3470 | auto_save_mode_bits = st.st_mode | 0600; |
| 3471 | else |
| 3472 | auto_save_mode_bits = 0666; |
| 3473 | |
| 3474 | return |
| 3475 | Fwrite_region (Qnil, Qnil, |
| 3476 | current_buffer->auto_save_file_name, |
| 3477 | Qnil, Qlambda); |
| 3478 | } |
| 3479 | |
| 3480 | static Lisp_Object |
| 3481 | do_auto_save_unwind (desc) /* used as unwind-protect function */ |
| 3482 | Lisp_Object desc; |
| 3483 | { |
| 3484 | close (XINT (desc)); |
| 3485 | return Qnil; |
| 3486 | } |
| 3487 | |
| 3488 | DEFUN ("do-auto-save", Fdo_auto_save, Sdo_auto_save, 0, 2, "", |
| 3489 | "Auto-save all buffers that need it.\n\ |
| 3490 | This is all buffers that have auto-saving enabled\n\ |
| 3491 | and are changed since last auto-saved.\n\ |
| 3492 | Auto-saving writes the buffer into a file\n\ |
| 3493 | so that your editing is not lost if the system crashes.\n\ |
| 3494 | This file is not the file you visited; that changes only when you save.\n\ |
| 3495 | Normally we run the normal hook `auto-save-hook' before saving.\n\n\ |
| 3496 | Non-nil first argument means do not print any message if successful.\n\ |
| 3497 | Non-nil second argument means save only current buffer.") |
| 3498 | (no_message, current_only) |
| 3499 | Lisp_Object no_message, current_only; |
| 3500 | { |
| 3501 | struct buffer *old = current_buffer, *b; |
| 3502 | Lisp_Object tail, buf; |
| 3503 | int auto_saved = 0; |
| 3504 | char *omessage = echo_area_glyphs; |
| 3505 | int omessage_length = echo_area_glyphs_length; |
| 3506 | extern int minibuf_level; |
| 3507 | int do_handled_files; |
| 3508 | Lisp_Object oquit; |
| 3509 | int listdesc; |
| 3510 | Lisp_Object lispstream; |
| 3511 | int count = specpdl_ptr - specpdl; |
| 3512 | int *ptr; |
| 3513 | |
| 3514 | /* Ordinarily don't quit within this function, |
| 3515 | but don't make it impossible to quit (in case we get hung in I/O). */ |
| 3516 | oquit = Vquit_flag; |
| 3517 | Vquit_flag = Qnil; |
| 3518 | |
| 3519 | /* No GCPRO needed, because (when it matters) all Lisp_Object variables |
| 3520 | point to non-strings reached from Vbuffer_alist. */ |
| 3521 | |
| 3522 | auto_saving = 1; |
| 3523 | if (minibuf_level) |
| 3524 | no_message = Qt; |
| 3525 | |
| 3526 | if (!NILP (Vrun_hooks)) |
| 3527 | call1 (Vrun_hooks, intern ("auto-save-hook")); |
| 3528 | |
| 3529 | if (STRINGP (Vauto_save_list_file_name)) |
| 3530 | { |
| 3531 | #ifdef MSDOS |
| 3532 | listdesc = open (XSTRING (Vauto_save_list_file_name)->data, |
| 3533 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
| 3534 | S_IREAD | S_IWRITE); |
| 3535 | #else /* not MSDOS */ |
| 3536 | listdesc = creat (XSTRING (Vauto_save_list_file_name)->data, 0666); |
| 3537 | #endif /* not MSDOS */ |
| 3538 | } |
| 3539 | else |
| 3540 | listdesc = -1; |
| 3541 | |
| 3542 | /* Arrange to close that file whether or not we get an error. */ |
| 3543 | if (listdesc >= 0) |
| 3544 | record_unwind_protect (do_auto_save_unwind, make_number (listdesc)); |
| 3545 | |
| 3546 | /* First, save all files which don't have handlers. If Emacs is |
| 3547 | crashing, the handlers may tweak what is causing Emacs to crash |
| 3548 | in the first place, and it would be a shame if Emacs failed to |
| 3549 | autosave perfectly ordinary files because it couldn't handle some |
| 3550 | ange-ftp'd file. */ |
| 3551 | for (do_handled_files = 0; do_handled_files < 2; do_handled_files++) |
| 3552 | for (tail = Vbuffer_alist; XGCTYPE (tail) == Lisp_Cons; |
| 3553 | tail = XCONS (tail)->cdr) |
| 3554 | { |
| 3555 | buf = XCONS (XCONS (tail)->car)->cdr; |
| 3556 | b = XBUFFER (buf); |
| 3557 | |
| 3558 | /* Record all the buffers that have auto save mode |
| 3559 | in the special file that lists them. */ |
| 3560 | if (XTYPE (b->auto_save_file_name) == Lisp_String |
| 3561 | && listdesc >= 0 && do_handled_files == 0) |
| 3562 | { |
| 3563 | write (listdesc, XSTRING (b->auto_save_file_name)->data, |
| 3564 | XSTRING (b->auto_save_file_name)->size); |
| 3565 | write (listdesc, "\n", 1); |
| 3566 | } |
| 3567 | |
| 3568 | if (!NILP (current_only) |
| 3569 | && b != current_buffer) |
| 3570 | continue; |
| 3571 | |
| 3572 | /* Check for auto save enabled |
| 3573 | and file changed since last auto save |
| 3574 | and file changed since last real save. */ |
| 3575 | if (XTYPE (b->auto_save_file_name) == Lisp_String |
| 3576 | && b->save_modified < BUF_MODIFF (b) |
| 3577 | && b->auto_save_modified < BUF_MODIFF (b) |
| 3578 | /* -1 means we've turned off autosaving for a while--see below. */ |
| 3579 | && XINT (b->save_length) >= 0 |
| 3580 | && (do_handled_files |
| 3581 | || NILP (Ffind_file_name_handler (b->auto_save_file_name, |
| 3582 | Qwrite_region)))) |
| 3583 | { |
| 3584 | EMACS_TIME before_time, after_time; |
| 3585 | |
| 3586 | EMACS_GET_TIME (before_time); |
| 3587 | |
| 3588 | /* If we had a failure, don't try again for 20 minutes. */ |
| 3589 | if (b->auto_save_failure_time >= 0 |
| 3590 | && EMACS_SECS (before_time) - b->auto_save_failure_time < 1200) |
| 3591 | continue; |
| 3592 | |
| 3593 | if ((XFASTINT (b->save_length) * 10 |
| 3594 | > (BUF_Z (b) - BUF_BEG (b)) * 13) |
| 3595 | /* A short file is likely to change a large fraction; |
| 3596 | spare the user annoying messages. */ |
| 3597 | && XFASTINT (b->save_length) > 5000 |
| 3598 | /* These messages are frequent and annoying for `*mail*'. */ |
| 3599 | && !EQ (b->filename, Qnil) |
| 3600 | && NILP (no_message)) |
| 3601 | { |
| 3602 | /* It has shrunk too much; turn off auto-saving here. */ |
| 3603 | message ("Buffer %s has shrunk a lot; auto save turned off there", |
| 3604 | XSTRING (b->name)->data); |
| 3605 | /* Turn off auto-saving until there's a real save, |
| 3606 | and prevent any more warnings. */ |
| 3607 | XSET (b->save_length, Lisp_Int, -1); |
| 3608 | Fsleep_for (make_number (1), Qnil); |
| 3609 | continue; |
| 3610 | } |
| 3611 | set_buffer_internal (b); |
| 3612 | if (!auto_saved && NILP (no_message)) |
| 3613 | message1 ("Auto-saving..."); |
| 3614 | internal_condition_case (auto_save_1, Qt, auto_save_error); |
| 3615 | auto_saved++; |
| 3616 | b->auto_save_modified = BUF_MODIFF (b); |
| 3617 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3618 | set_buffer_internal (old); |
| 3619 | |
| 3620 | EMACS_GET_TIME (after_time); |
| 3621 | |
| 3622 | /* If auto-save took more than 60 seconds, |
| 3623 | assume it was an NFS failure that got a timeout. */ |
| 3624 | if (EMACS_SECS (after_time) - EMACS_SECS (before_time) > 60) |
| 3625 | b->auto_save_failure_time = EMACS_SECS (after_time); |
| 3626 | } |
| 3627 | } |
| 3628 | |
| 3629 | /* Prevent another auto save till enough input events come in. */ |
| 3630 | record_auto_save (); |
| 3631 | |
| 3632 | if (auto_saved && NILP (no_message)) |
| 3633 | { |
| 3634 | if (omessage) |
| 3635 | message2 (omessage, omessage_length); |
| 3636 | else |
| 3637 | message1 ("Auto-saving...done"); |
| 3638 | } |
| 3639 | |
| 3640 | Vquit_flag = oquit; |
| 3641 | |
| 3642 | auto_saving = 0; |
| 3643 | unbind_to (count, Qnil); |
| 3644 | return Qnil; |
| 3645 | } |
| 3646 | |
| 3647 | DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved, |
| 3648 | Sset_buffer_auto_saved, 0, 0, 0, |
| 3649 | "Mark current buffer as auto-saved with its current text.\n\ |
| 3650 | No auto-save file will be written until the buffer changes again.") |
| 3651 | () |
| 3652 | { |
| 3653 | current_buffer->auto_save_modified = MODIFF; |
| 3654 | XFASTINT (current_buffer->save_length) = Z - BEG; |
| 3655 | current_buffer->auto_save_failure_time = -1; |
| 3656 | return Qnil; |
| 3657 | } |
| 3658 | |
| 3659 | DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure, |
| 3660 | Sclear_buffer_auto_save_failure, 0, 0, 0, |
| 3661 | "Clear any record of a recent auto-save failure in the current buffer.") |
| 3662 | () |
| 3663 | { |
| 3664 | current_buffer->auto_save_failure_time = -1; |
| 3665 | return Qnil; |
| 3666 | } |
| 3667 | |
| 3668 | DEFUN ("recent-auto-save-p", Frecent_auto_save_p, Srecent_auto_save_p, |
| 3669 | 0, 0, 0, |
| 3670 | "Return t if buffer has been auto-saved since last read in or saved.") |
| 3671 | () |
| 3672 | { |
| 3673 | return (current_buffer->save_modified < current_buffer->auto_save_modified) ? Qt : Qnil; |
| 3674 | } |
| 3675 | \f |
| 3676 | /* Reading and completing file names */ |
| 3677 | extern Lisp_Object Ffile_name_completion (), Ffile_name_all_completions (); |
| 3678 | |
| 3679 | /* In the string VAL, change each $ to $$ and return the result. */ |
| 3680 | |
| 3681 | static Lisp_Object |
| 3682 | double_dollars (val) |
| 3683 | Lisp_Object val; |
| 3684 | { |
| 3685 | register unsigned char *old, *new; |
| 3686 | register int n; |
| 3687 | int osize, count; |
| 3688 | |
| 3689 | osize = XSTRING (val)->size; |
| 3690 | /* Quote "$" as "$$" to get it past substitute-in-file-name */ |
| 3691 | for (n = osize, count = 0, old = XSTRING (val)->data; n > 0; n--) |
| 3692 | if (*old++ == '$') count++; |
| 3693 | if (count > 0) |
| 3694 | { |
| 3695 | old = XSTRING (val)->data; |
| 3696 | val = Fmake_string (make_number (osize + count), make_number (0)); |
| 3697 | new = XSTRING (val)->data; |
| 3698 | for (n = osize; n > 0; n--) |
| 3699 | if (*old != '$') |
| 3700 | *new++ = *old++; |
| 3701 | else |
| 3702 | { |
| 3703 | *new++ = '$'; |
| 3704 | *new++ = '$'; |
| 3705 | old++; |
| 3706 | } |
| 3707 | } |
| 3708 | return val; |
| 3709 | } |
| 3710 | |
| 3711 | DEFUN ("read-file-name-internal", Fread_file_name_internal, Sread_file_name_internal, |
| 3712 | 3, 3, 0, |
| 3713 | "Internal subroutine for read-file-name. Do not call this.") |
| 3714 | (string, dir, action) |
| 3715 | Lisp_Object string, dir, action; |
| 3716 | /* action is nil for complete, t for return list of completions, |
| 3717 | lambda for verify final value */ |
| 3718 | { |
| 3719 | Lisp_Object name, specdir, realdir, val, orig_string; |
| 3720 | int changed; |
| 3721 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3722 | |
| 3723 | realdir = dir; |
| 3724 | name = string; |
| 3725 | orig_string = Qnil; |
| 3726 | specdir = Qnil; |
| 3727 | changed = 0; |
| 3728 | /* No need to protect ACTION--we only compare it with t and nil. */ |
| 3729 | GCPRO4 (string, realdir, name, specdir); |
| 3730 | |
| 3731 | if (XSTRING (string)->size == 0) |
| 3732 | { |
| 3733 | if (EQ (action, Qlambda)) |
| 3734 | { |
| 3735 | UNGCPRO; |
| 3736 | return Qnil; |
| 3737 | } |
| 3738 | } |
| 3739 | else |
| 3740 | { |
| 3741 | orig_string = string; |
| 3742 | string = Fsubstitute_in_file_name (string); |
| 3743 | changed = NILP (Fstring_equal (string, orig_string)); |
| 3744 | name = Ffile_name_nondirectory (string); |
| 3745 | val = Ffile_name_directory (string); |
| 3746 | if (! NILP (val)) |
| 3747 | realdir = Fexpand_file_name (val, realdir); |
| 3748 | } |
| 3749 | |
| 3750 | if (NILP (action)) |
| 3751 | { |
| 3752 | specdir = Ffile_name_directory (string); |
| 3753 | val = Ffile_name_completion (name, realdir); |
| 3754 | UNGCPRO; |
| 3755 | if (XTYPE (val) != Lisp_String) |
| 3756 | { |
| 3757 | if (changed) |
| 3758 | return string; |
| 3759 | return val; |
| 3760 | } |
| 3761 | |
| 3762 | if (!NILP (specdir)) |
| 3763 | val = concat2 (specdir, val); |
| 3764 | #ifndef VMS |
| 3765 | return double_dollars (val); |
| 3766 | #else /* not VMS */ |
| 3767 | return val; |
| 3768 | #endif /* not VMS */ |
| 3769 | } |
| 3770 | UNGCPRO; |
| 3771 | |
| 3772 | if (EQ (action, Qt)) |
| 3773 | return Ffile_name_all_completions (name, realdir); |
| 3774 | /* Only other case actually used is ACTION = lambda */ |
| 3775 | #ifdef VMS |
| 3776 | /* Supposedly this helps commands such as `cd' that read directory names, |
| 3777 | but can someone explain how it helps them? -- RMS */ |
| 3778 | if (XSTRING (name)->size == 0) |
| 3779 | return Qt; |
| 3780 | #endif /* VMS */ |
| 3781 | return Ffile_exists_p (string); |
| 3782 | } |
| 3783 | |
| 3784 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3785 | "Read file name, prompting with PROMPT and completing in directory DIR.\n\ |
| 3786 | Value is not expanded---you must call `expand-file-name' yourself.\n\ |
| 3787 | Default name to DEFAULT if user enters a null string.\n\ |
| 3788 | (If DEFAULT is omitted, the visited file name is used.)\n\ |
| 3789 | Fourth arg MUSTMATCH non-nil means require existing file's name.\n\ |
| 3790 | Non-nil and non-t means also require confirmation after completion.\n\ |
| 3791 | Fifth arg INITIAL specifies text to start with.\n\ |
| 3792 | DIR defaults to current buffer's directory default.") |
| 3793 | (prompt, dir, defalt, mustmatch, initial) |
| 3794 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3795 | { |
| 3796 | Lisp_Object val, insdef, insdef1, tem; |
| 3797 | struct gcpro gcpro1, gcpro2; |
| 3798 | register char *homedir; |
| 3799 | int count; |
| 3800 | |
| 3801 | if (NILP (dir)) |
| 3802 | dir = current_buffer->directory; |
| 3803 | if (NILP (defalt)) |
| 3804 | defalt = current_buffer->filename; |
| 3805 | |
| 3806 | /* If dir starts with user's homedir, change that to ~. */ |
| 3807 | homedir = (char *) egetenv ("HOME"); |
| 3808 | if (homedir != 0 |
| 3809 | && XTYPE (dir) == Lisp_String |
| 3810 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3811 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3812 | { |
| 3813 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3814 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3815 | XSTRING (dir)->data[0] = '~'; |
| 3816 | } |
| 3817 | |
| 3818 | if (insert_default_directory) |
| 3819 | { |
| 3820 | insdef = dir; |
| 3821 | if (!NILP (initial)) |
| 3822 | { |
| 3823 | Lisp_Object args[2], pos; |
| 3824 | |
| 3825 | args[0] = insdef; |
| 3826 | args[1] = initial; |
| 3827 | insdef = Fconcat (2, args); |
| 3828 | pos = make_number (XSTRING (double_dollars (dir))->size); |
| 3829 | insdef1 = Fcons (double_dollars (insdef), pos); |
| 3830 | } |
| 3831 | else |
| 3832 | insdef1 = double_dollars (insdef); |
| 3833 | } |
| 3834 | else if (!NILP (initial)) |
| 3835 | { |
| 3836 | insdef = initial; |
| 3837 | insdef1 = Fcons (double_dollars (insdef), 0); |
| 3838 | } |
| 3839 | else |
| 3840 | insdef = Qnil, insdef1 = Qnil; |
| 3841 | |
| 3842 | #ifdef VMS |
| 3843 | count = specpdl_ptr - specpdl; |
| 3844 | specbind (intern ("completion-ignore-case"), Qt); |
| 3845 | #endif |
| 3846 | |
| 3847 | GCPRO2 (insdef, defalt); |
| 3848 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3849 | dir, mustmatch, insdef1, |
| 3850 | Qfile_name_history); |
| 3851 | |
| 3852 | #ifdef VMS |
| 3853 | unbind_to (count, Qnil); |
| 3854 | #endif |
| 3855 | |
| 3856 | UNGCPRO; |
| 3857 | if (NILP (val)) |
| 3858 | error ("No file name specified"); |
| 3859 | tem = Fstring_equal (val, insdef); |
| 3860 | if (!NILP (tem) && !NILP (defalt)) |
| 3861 | return defalt; |
| 3862 | if (XSTRING (val)->size == 0 && NILP (insdef)) |
| 3863 | { |
| 3864 | if (!NILP (defalt)) |
| 3865 | return defalt; |
| 3866 | else |
| 3867 | error ("No default file name"); |
| 3868 | } |
| 3869 | return Fsubstitute_in_file_name (val); |
| 3870 | } |
| 3871 | |
| 3872 | #if 0 /* Old version */ |
| 3873 | DEFUN ("read-file-name", Fread_file_name, Sread_file_name, 1, 5, 0, |
| 3874 | /* Don't confuse make-docfile by having two doc strings for this function. |
| 3875 | make-docfile does not pay attention to #if, for good reason! */ |
| 3876 | 0) |
| 3877 | (prompt, dir, defalt, mustmatch, initial) |
| 3878 | Lisp_Object prompt, dir, defalt, mustmatch, initial; |
| 3879 | { |
| 3880 | Lisp_Object val, insdef, tem; |
| 3881 | struct gcpro gcpro1, gcpro2; |
| 3882 | register char *homedir; |
| 3883 | int count; |
| 3884 | |
| 3885 | if (NILP (dir)) |
| 3886 | dir = current_buffer->directory; |
| 3887 | if (NILP (defalt)) |
| 3888 | defalt = current_buffer->filename; |
| 3889 | |
| 3890 | /* If dir starts with user's homedir, change that to ~. */ |
| 3891 | homedir = (char *) egetenv ("HOME"); |
| 3892 | if (homedir != 0 |
| 3893 | && XTYPE (dir) == Lisp_String |
| 3894 | && !strncmp (homedir, XSTRING (dir)->data, strlen (homedir)) |
| 3895 | && XSTRING (dir)->data[strlen (homedir)] == '/') |
| 3896 | { |
| 3897 | dir = make_string (XSTRING (dir)->data + strlen (homedir) - 1, |
| 3898 | XSTRING (dir)->size - strlen (homedir) + 1); |
| 3899 | XSTRING (dir)->data[0] = '~'; |
| 3900 | } |
| 3901 | |
| 3902 | if (!NILP (initial)) |
| 3903 | insdef = initial; |
| 3904 | else if (insert_default_directory) |
| 3905 | insdef = dir; |
| 3906 | else |
| 3907 | insdef = build_string (""); |
| 3908 | |
| 3909 | #ifdef VMS |
| 3910 | count = specpdl_ptr - specpdl; |
| 3911 | specbind (intern ("completion-ignore-case"), Qt); |
| 3912 | #endif |
| 3913 | |
| 3914 | GCPRO2 (insdef, defalt); |
| 3915 | val = Fcompleting_read (prompt, intern ("read-file-name-internal"), |
| 3916 | dir, mustmatch, |
| 3917 | insert_default_directory ? insdef : Qnil, |
| 3918 | Qfile_name_history); |
| 3919 | |
| 3920 | #ifdef VMS |
| 3921 | unbind_to (count, Qnil); |
| 3922 | #endif |
| 3923 | |
| 3924 | UNGCPRO; |
| 3925 | if (NILP (val)) |
| 3926 | error ("No file name specified"); |
| 3927 | tem = Fstring_equal (val, insdef); |
| 3928 | if (!NILP (tem) && !NILP (defalt)) |
| 3929 | return defalt; |
| 3930 | return Fsubstitute_in_file_name (val); |
| 3931 | } |
| 3932 | #endif /* Old version */ |
| 3933 | \f |
| 3934 | syms_of_fileio () |
| 3935 | { |
| 3936 | Qexpand_file_name = intern ("expand-file-name"); |
| 3937 | Qdirectory_file_name = intern ("directory-file-name"); |
| 3938 | Qfile_name_directory = intern ("file-name-directory"); |
| 3939 | Qfile_name_nondirectory = intern ("file-name-nondirectory"); |
| 3940 | Qunhandled_file_name_directory = intern ("unhandled-file-name-directory"); |
| 3941 | Qfile_name_as_directory = intern ("file-name-as-directory"); |
| 3942 | Qcopy_file = intern ("copy-file"); |
| 3943 | Qmake_directory = intern ("make-directory"); |
| 3944 | Qdelete_directory = intern ("delete-directory"); |
| 3945 | Qdelete_file = intern ("delete-file"); |
| 3946 | Qrename_file = intern ("rename-file"); |
| 3947 | Qadd_name_to_file = intern ("add-name-to-file"); |
| 3948 | Qmake_symbolic_link = intern ("make-symbolic-link"); |
| 3949 | Qfile_exists_p = intern ("file-exists-p"); |
| 3950 | Qfile_executable_p = intern ("file-executable-p"); |
| 3951 | Qfile_readable_p = intern ("file-readable-p"); |
| 3952 | Qfile_symlink_p = intern ("file-symlink-p"); |
| 3953 | Qfile_writable_p = intern ("file-writable-p"); |
| 3954 | Qfile_directory_p = intern ("file-directory-p"); |
| 3955 | Qfile_accessible_directory_p = intern ("file-accessible-directory-p"); |
| 3956 | Qfile_modes = intern ("file-modes"); |
| 3957 | Qset_file_modes = intern ("set-file-modes"); |
| 3958 | Qfile_newer_than_file_p = intern ("file-newer-than-file-p"); |
| 3959 | Qinsert_file_contents = intern ("insert-file-contents"); |
| 3960 | Qwrite_region = intern ("write-region"); |
| 3961 | Qverify_visited_file_modtime = intern ("verify-visited-file-modtime"); |
| 3962 | Qset_visited_file_modtime = intern ("set-visited-file-modtime"); |
| 3963 | |
| 3964 | staticpro (&Qexpand_file_name); |
| 3965 | staticpro (&Qdirectory_file_name); |
| 3966 | staticpro (&Qfile_name_directory); |
| 3967 | staticpro (&Qfile_name_nondirectory); |
| 3968 | staticpro (&Qunhandled_file_name_directory); |
| 3969 | staticpro (&Qfile_name_as_directory); |
| 3970 | staticpro (&Qcopy_file); |
| 3971 | staticpro (&Qmake_directory); |
| 3972 | staticpro (&Qdelete_directory); |
| 3973 | staticpro (&Qdelete_file); |
| 3974 | staticpro (&Qrename_file); |
| 3975 | staticpro (&Qadd_name_to_file); |
| 3976 | staticpro (&Qmake_symbolic_link); |
| 3977 | staticpro (&Qfile_exists_p); |
| 3978 | staticpro (&Qfile_executable_p); |
| 3979 | staticpro (&Qfile_readable_p); |
| 3980 | staticpro (&Qfile_symlink_p); |
| 3981 | staticpro (&Qfile_writable_p); |
| 3982 | staticpro (&Qfile_directory_p); |
| 3983 | staticpro (&Qfile_accessible_directory_p); |
| 3984 | staticpro (&Qfile_modes); |
| 3985 | staticpro (&Qset_file_modes); |
| 3986 | staticpro (&Qfile_newer_than_file_p); |
| 3987 | staticpro (&Qinsert_file_contents); |
| 3988 | staticpro (&Qwrite_region); |
| 3989 | staticpro (&Qverify_visited_file_modtime); |
| 3990 | |
| 3991 | Qfile_name_history = intern ("file-name-history"); |
| 3992 | Fset (Qfile_name_history, Qnil); |
| 3993 | staticpro (&Qfile_name_history); |
| 3994 | |
| 3995 | Qfile_error = intern ("file-error"); |
| 3996 | staticpro (&Qfile_error); |
| 3997 | Qfile_already_exists = intern("file-already-exists"); |
| 3998 | staticpro (&Qfile_already_exists); |
| 3999 | |
| 4000 | #ifdef MSDOS |
| 4001 | Qfind_buffer_file_type = intern ("find-buffer-file-type"); |
| 4002 | staticpro (&Qfind_buffer_file_type); |
| 4003 | #endif |
| 4004 | |
| 4005 | Qcar_less_than_car = intern ("car-less-than-car"); |
| 4006 | staticpro (&Qcar_less_than_car); |
| 4007 | |
| 4008 | Fput (Qfile_error, Qerror_conditions, |
| 4009 | Fcons (Qfile_error, Fcons (Qerror, Qnil))); |
| 4010 | Fput (Qfile_error, Qerror_message, |
| 4011 | build_string ("File error")); |
| 4012 | |
| 4013 | Fput (Qfile_already_exists, Qerror_conditions, |
| 4014 | Fcons (Qfile_already_exists, |
| 4015 | Fcons (Qfile_error, Fcons (Qerror, Qnil)))); |
| 4016 | Fput (Qfile_already_exists, Qerror_message, |
| 4017 | build_string ("File already exists")); |
| 4018 | |
| 4019 | DEFVAR_BOOL ("insert-default-directory", &insert_default_directory, |
| 4020 | "*Non-nil means when reading a filename start with default dir in minibuffer."); |
| 4021 | insert_default_directory = 1; |
| 4022 | |
| 4023 | DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm, |
| 4024 | "*Non-nil means write new files with record format `stmlf'.\n\ |
| 4025 | nil means use format `var'. This variable is meaningful only on VMS."); |
| 4026 | vms_stmlf_recfm = 0; |
| 4027 | |
| 4028 | DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist, |
| 4029 | "*Alist of elements (REGEXP . HANDLER) for file names handled specially.\n\ |
| 4030 | If a file name matches REGEXP, then all I/O on that file is done by calling\n\ |
| 4031 | HANDLER.\n\ |
| 4032 | \n\ |
| 4033 | The first argument given to HANDLER is the name of the I/O primitive\n\ |
| 4034 | to be handled; the remaining arguments are the arguments that were\n\ |
| 4035 | passed to that primitive. For example, if you do\n\ |
| 4036 | (file-exists-p FILENAME)\n\ |
| 4037 | and FILENAME is handled by HANDLER, then HANDLER is called like this:\n\ |
| 4038 | (funcall HANDLER 'file-exists-p FILENAME)\n\ |
| 4039 | The function `find-file-name-handler' checks this list for a handler\n\ |
| 4040 | for its argument."); |
| 4041 | Vfile_name_handler_alist = Qnil; |
| 4042 | |
| 4043 | DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions, |
| 4044 | "A list of functions to be called at the end of `insert-file-contents'.\n\ |
| 4045 | Each is passed one argument, the number of bytes inserted. It should return\n\ |
| 4046 | the new byte count, and leave point the same. If `insert-file-contents' is\n\ |
| 4047 | intercepted by a handler from `file-name-handler-alist', that handler is\n\ |
| 4048 | responsible for calling the after-insert-file-functions if appropriate."); |
| 4049 | Vafter_insert_file_functions = Qnil; |
| 4050 | |
| 4051 | DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions, |
| 4052 | "A list of functions to be called at the start of `write-region'.\n\ |
| 4053 | Each is passed two arguments, START and END as for `write-region'. It should\n\ |
| 4054 | return a list of pairs (POSITION . STRING) of strings to be effectively\n\ |
| 4055 | inserted at the specified positions of the file being written (1 means to\n\ |
| 4056 | insert before the first byte written). The POSITIONs must be sorted into\n\ |
| 4057 | increasing order. If there are several functions in the list, the several\n\ |
| 4058 | lists are merged destructively."); |
| 4059 | Vwrite_region_annotate_functions = Qnil; |
| 4060 | |
| 4061 | DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers, |
| 4062 | "A list of file name handlers that temporarily should not be used.\n\ |
| 4063 | This applies only to the operation `inhibit-file-name-operation'."); |
| 4064 | Vinhibit_file_name_handlers = Qnil; |
| 4065 | |
| 4066 | DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation, |
| 4067 | "The operation for which `inhibit-file-name-handlers' is applicable."); |
| 4068 | Vinhibit_file_name_operation = Qnil; |
| 4069 | |
| 4070 | DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name, |
| 4071 | "File name in which we write a list of all auto save file names."); |
| 4072 | Vauto_save_list_file_name = Qnil; |
| 4073 | |
| 4074 | defsubr (&Sfind_file_name_handler); |
| 4075 | defsubr (&Sfile_name_directory); |
| 4076 | defsubr (&Sfile_name_nondirectory); |
| 4077 | defsubr (&Sunhandled_file_name_directory); |
| 4078 | defsubr (&Sfile_name_as_directory); |
| 4079 | defsubr (&Sdirectory_file_name); |
| 4080 | defsubr (&Smake_temp_name); |
| 4081 | defsubr (&Sexpand_file_name); |
| 4082 | defsubr (&Ssubstitute_in_file_name); |
| 4083 | defsubr (&Scopy_file); |
| 4084 | defsubr (&Smake_directory_internal); |
| 4085 | defsubr (&Sdelete_directory); |
| 4086 | defsubr (&Sdelete_file); |
| 4087 | defsubr (&Srename_file); |
| 4088 | defsubr (&Sadd_name_to_file); |
| 4089 | #ifdef S_IFLNK |
| 4090 | defsubr (&Smake_symbolic_link); |
| 4091 | #endif /* S_IFLNK */ |
| 4092 | #ifdef VMS |
| 4093 | defsubr (&Sdefine_logical_name); |
| 4094 | #endif /* VMS */ |
| 4095 | #ifdef HPUX_NET |
| 4096 | defsubr (&Ssysnetunam); |
| 4097 | #endif /* HPUX_NET */ |
| 4098 | defsubr (&Sfile_name_absolute_p); |
| 4099 | defsubr (&Sfile_exists_p); |
| 4100 | defsubr (&Sfile_executable_p); |
| 4101 | defsubr (&Sfile_readable_p); |
| 4102 | defsubr (&Sfile_writable_p); |
| 4103 | defsubr (&Sfile_symlink_p); |
| 4104 | defsubr (&Sfile_directory_p); |
| 4105 | defsubr (&Sfile_accessible_directory_p); |
| 4106 | defsubr (&Sfile_modes); |
| 4107 | defsubr (&Sset_file_modes); |
| 4108 | defsubr (&Sset_default_file_modes); |
| 4109 | defsubr (&Sdefault_file_modes); |
| 4110 | defsubr (&Sfile_newer_than_file_p); |
| 4111 | defsubr (&Sinsert_file_contents); |
| 4112 | defsubr (&Swrite_region); |
| 4113 | defsubr (&Scar_less_than_car); |
| 4114 | defsubr (&Sverify_visited_file_modtime); |
| 4115 | defsubr (&Sclear_visited_file_modtime); |
| 4116 | defsubr (&Svisited_file_modtime); |
| 4117 | defsubr (&Sset_visited_file_modtime); |
| 4118 | defsubr (&Sdo_auto_save); |
| 4119 | defsubr (&Sset_buffer_auto_saved); |
| 4120 | defsubr (&Sclear_buffer_auto_save_failure); |
| 4121 | defsubr (&Srecent_auto_save_p); |
| 4122 | |
| 4123 | defsubr (&Sread_file_name_internal); |
| 4124 | defsubr (&Sread_file_name); |
| 4125 | |
| 4126 | #ifdef unix |
| 4127 | defsubr (&Sunix_sync); |
| 4128 | #endif |
| 4129 | } |