| 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
| 2 | Copyright (C) 1994, 1995 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, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. |
| 20 | |
| 21 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | #include <stddef.h> /* for offsetof */ |
| 26 | #include <stdlib.h> |
| 27 | #include <stdio.h> |
| 28 | #include <io.h> |
| 29 | #include <errno.h> |
| 30 | #include <fcntl.h> |
| 31 | #include <ctype.h> |
| 32 | #include <signal.h> |
| 33 | #include <sys/file.h> |
| 34 | #include <sys/time.h> |
| 35 | #include <sys/utime.h> |
| 36 | |
| 37 | /* must include CRT headers *before* config.h */ |
| 38 | #include "config.h" |
| 39 | #undef access |
| 40 | #undef chdir |
| 41 | #undef chmod |
| 42 | #undef creat |
| 43 | #undef ctime |
| 44 | #undef fopen |
| 45 | #undef link |
| 46 | #undef mkdir |
| 47 | #undef mktemp |
| 48 | #undef open |
| 49 | #undef rename |
| 50 | #undef rmdir |
| 51 | #undef unlink |
| 52 | |
| 53 | #undef close |
| 54 | #undef dup |
| 55 | #undef dup2 |
| 56 | #undef pipe |
| 57 | #undef read |
| 58 | #undef write |
| 59 | |
| 60 | #undef strerror |
| 61 | |
| 62 | #include "lisp.h" |
| 63 | |
| 64 | #include <pwd.h> |
| 65 | |
| 66 | #ifdef __GNUC__ |
| 67 | #define _ANONYMOUS_UNION |
| 68 | #define _ANONYMOUS_STRUCT |
| 69 | #endif |
| 70 | #include <windows.h> |
| 71 | |
| 72 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 73 | #include <sys/socket.h> |
| 74 | #undef socket |
| 75 | #undef bind |
| 76 | #undef connect |
| 77 | #undef htons |
| 78 | #undef ntohs |
| 79 | #undef inet_addr |
| 80 | #undef gethostname |
| 81 | #undef gethostbyname |
| 82 | #undef getservbyname |
| 83 | #undef shutdown |
| 84 | #endif |
| 85 | |
| 86 | #include "w32.h" |
| 87 | #include "ndir.h" |
| 88 | #include "w32heap.h" |
| 89 | |
| 90 | #undef min |
| 91 | #undef max |
| 92 | #define min(x, y) (((x) < (y)) ? (x) : (y)) |
| 93 | #define max(x, y) (((x) > (y)) ? (x) : (y)) |
| 94 | |
| 95 | extern Lisp_Object Vw32_downcase_file_names; |
| 96 | extern Lisp_Object Vw32_generate_fake_inodes; |
| 97 | extern Lisp_Object Vw32_get_true_file_attributes; |
| 98 | extern Lisp_Object Vw32_num_mouse_buttons; |
| 99 | |
| 100 | static char startup_dir[MAXPATHLEN]; |
| 101 | |
| 102 | /* Get the current working directory. */ |
| 103 | char * |
| 104 | getwd (char *dir) |
| 105 | { |
| 106 | #if 0 |
| 107 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
| 108 | return dir; |
| 109 | return NULL; |
| 110 | #else |
| 111 | /* Emacs doesn't actually change directory itself, and we want to |
| 112 | force our real wd to be where emacs.exe is to avoid unnecessary |
| 113 | conflicts when trying to rename or delete directories. */ |
| 114 | strcpy (dir, startup_dir); |
| 115 | return dir; |
| 116 | #endif |
| 117 | } |
| 118 | |
| 119 | #ifndef HAVE_SOCKETS |
| 120 | /* Emulate gethostname. */ |
| 121 | int |
| 122 | gethostname (char *buffer, int size) |
| 123 | { |
| 124 | /* NT only allows small host names, so the buffer is |
| 125 | certainly large enough. */ |
| 126 | return !GetComputerName (buffer, &size); |
| 127 | } |
| 128 | #endif /* HAVE_SOCKETS */ |
| 129 | |
| 130 | /* Emulate getloadavg. */ |
| 131 | int |
| 132 | getloadavg (double loadavg[], int nelem) |
| 133 | { |
| 134 | int i; |
| 135 | |
| 136 | /* A faithful emulation is going to have to be saved for a rainy day. */ |
| 137 | for (i = 0; i < nelem; i++) |
| 138 | { |
| 139 | loadavg[i] = 0.0; |
| 140 | } |
| 141 | return i; |
| 142 | } |
| 143 | |
| 144 | /* Emulate getpwuid, getpwnam and others. */ |
| 145 | |
| 146 | #define PASSWD_FIELD_SIZE 256 |
| 147 | |
| 148 | static char the_passwd_name[PASSWD_FIELD_SIZE]; |
| 149 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; |
| 150 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; |
| 151 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; |
| 152 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; |
| 153 | |
| 154 | static struct passwd the_passwd = |
| 155 | { |
| 156 | the_passwd_name, |
| 157 | the_passwd_passwd, |
| 158 | 0, |
| 159 | 0, |
| 160 | 0, |
| 161 | the_passwd_gecos, |
| 162 | the_passwd_dir, |
| 163 | the_passwd_shell, |
| 164 | }; |
| 165 | |
| 166 | int |
| 167 | getuid () |
| 168 | { |
| 169 | return the_passwd.pw_uid; |
| 170 | } |
| 171 | |
| 172 | int |
| 173 | geteuid () |
| 174 | { |
| 175 | /* I could imagine arguing for checking to see whether the user is |
| 176 | in the Administrators group and returning a UID of 0 for that |
| 177 | case, but I don't know how wise that would be in the long run. */ |
| 178 | return getuid (); |
| 179 | } |
| 180 | |
| 181 | int |
| 182 | getgid () |
| 183 | { |
| 184 | return the_passwd.pw_gid; |
| 185 | } |
| 186 | |
| 187 | int |
| 188 | getegid () |
| 189 | { |
| 190 | return getgid (); |
| 191 | } |
| 192 | |
| 193 | struct passwd * |
| 194 | getpwuid (int uid) |
| 195 | { |
| 196 | if (uid == the_passwd.pw_uid) |
| 197 | return &the_passwd; |
| 198 | return NULL; |
| 199 | } |
| 200 | |
| 201 | struct passwd * |
| 202 | getpwnam (char *name) |
| 203 | { |
| 204 | struct passwd *pw; |
| 205 | |
| 206 | pw = getpwuid (getuid ()); |
| 207 | if (!pw) |
| 208 | return pw; |
| 209 | |
| 210 | if (stricmp (name, pw->pw_name)) |
| 211 | return NULL; |
| 212 | |
| 213 | return pw; |
| 214 | } |
| 215 | |
| 216 | void |
| 217 | init_user_info () |
| 218 | { |
| 219 | /* Find the user's real name by opening the process token and |
| 220 | looking up the name associated with the user-sid in that token. |
| 221 | |
| 222 | Use the relative portion of the identifier authority value from |
| 223 | the user-sid as the user id value (same for group id using the |
| 224 | primary group sid from the process token). */ |
| 225 | |
| 226 | char user_sid[256], name[256], domain[256]; |
| 227 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; |
| 228 | HANDLE token = NULL; |
| 229 | SID_NAME_USE user_type; |
| 230 | |
| 231 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) |
| 232 | && GetTokenInformation (token, TokenUser, |
| 233 | (PVOID) user_sid, sizeof (user_sid), &trash) |
| 234 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, |
| 235 | domain, &dlength, &user_type)) |
| 236 | { |
| 237 | strcpy (the_passwd.pw_name, name); |
| 238 | /* Determine a reasonable uid value. */ |
| 239 | if (stricmp ("administrator", name) == 0) |
| 240 | { |
| 241 | the_passwd.pw_uid = 0; |
| 242 | the_passwd.pw_gid = 0; |
| 243 | } |
| 244 | else |
| 245 | { |
| 246 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 247 | |
| 248 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 249 | /* I believe the relative portion is the last 4 bytes (of 6) |
| 250 | with msb first. */ |
| 251 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + |
| 252 | (pSIA->Value[3] << 16) + |
| 253 | (pSIA->Value[4] << 8) + |
| 254 | (pSIA->Value[5] << 0)); |
| 255 | /* restrict to conventional uid range for normal users */ |
| 256 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; |
| 257 | |
| 258 | /* Get group id */ |
| 259 | if (GetTokenInformation (token, TokenPrimaryGroup, |
| 260 | (PVOID) user_sid, sizeof (user_sid), &trash)) |
| 261 | { |
| 262 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 263 | |
| 264 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 265 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + |
| 266 | (pSIA->Value[3] << 16) + |
| 267 | (pSIA->Value[4] << 8) + |
| 268 | (pSIA->Value[5] << 0)); |
| 269 | /* I don't know if this is necessary, but for safety... */ |
| 270 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; |
| 271 | } |
| 272 | else |
| 273 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 274 | } |
| 275 | } |
| 276 | /* If security calls are not supported (presumably because we |
| 277 | are running under Windows 95), fallback to this. */ |
| 278 | else if (GetUserName (name, &length)) |
| 279 | { |
| 280 | strcpy (the_passwd.pw_name, name); |
| 281 | if (stricmp ("administrator", name) == 0) |
| 282 | the_passwd.pw_uid = 0; |
| 283 | else |
| 284 | the_passwd.pw_uid = 123; |
| 285 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 286 | } |
| 287 | else |
| 288 | { |
| 289 | strcpy (the_passwd.pw_name, "unknown"); |
| 290 | the_passwd.pw_uid = 123; |
| 291 | the_passwd.pw_gid = 123; |
| 292 | } |
| 293 | |
| 294 | /* Ensure HOME and SHELL are defined. */ |
| 295 | if (getenv ("HOME") == NULL) |
| 296 | abort (); |
| 297 | if (getenv ("SHELL") == NULL) |
| 298 | abort (); |
| 299 | |
| 300 | /* Set dir and shell from environment variables. */ |
| 301 | strcpy (the_passwd.pw_dir, getenv ("HOME")); |
| 302 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); |
| 303 | |
| 304 | if (token) |
| 305 | CloseHandle (token); |
| 306 | } |
| 307 | |
| 308 | int |
| 309 | random () |
| 310 | { |
| 311 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
| 312 | return ((rand () << 15) | rand ()); |
| 313 | } |
| 314 | |
| 315 | void |
| 316 | srandom (int seed) |
| 317 | { |
| 318 | srand (seed); |
| 319 | } |
| 320 | |
| 321 | |
| 322 | /* Normalize filename by converting all path separators to |
| 323 | the specified separator. Also conditionally convert upper |
| 324 | case path name components to lower case. */ |
| 325 | |
| 326 | static void |
| 327 | normalize_filename (fp, path_sep) |
| 328 | register char *fp; |
| 329 | char path_sep; |
| 330 | { |
| 331 | char sep; |
| 332 | char *elem; |
| 333 | |
| 334 | /* Always lower-case drive letters a-z, even if the filesystem |
| 335 | preserves case in filenames. |
| 336 | This is so filenames can be compared by string comparison |
| 337 | functions that are case-sensitive. Even case-preserving filesystems |
| 338 | do not distinguish case in drive letters. */ |
| 339 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') |
| 340 | { |
| 341 | *fp += 'a' - 'A'; |
| 342 | fp += 2; |
| 343 | } |
| 344 | |
| 345 | if (NILP (Vw32_downcase_file_names)) |
| 346 | { |
| 347 | while (*fp) |
| 348 | { |
| 349 | if (*fp == '/' || *fp == '\\') |
| 350 | *fp = path_sep; |
| 351 | fp++; |
| 352 | } |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | sep = path_sep; /* convert to this path separator */ |
| 357 | elem = fp; /* start of current path element */ |
| 358 | |
| 359 | do { |
| 360 | if (*fp >= 'a' && *fp <= 'z') |
| 361 | elem = 0; /* don't convert this element */ |
| 362 | |
| 363 | if (*fp == 0 || *fp == ':') |
| 364 | { |
| 365 | sep = *fp; /* restore current separator (or 0) */ |
| 366 | *fp = '/'; /* after conversion of this element */ |
| 367 | } |
| 368 | |
| 369 | if (*fp == '/' || *fp == '\\') |
| 370 | { |
| 371 | if (elem && elem != fp) |
| 372 | { |
| 373 | *fp = 0; /* temporary end of string */ |
| 374 | _strlwr (elem); /* while we convert to lower case */ |
| 375 | } |
| 376 | *fp = sep; /* convert (or restore) path separator */ |
| 377 | elem = fp + 1; /* next element starts after separator */ |
| 378 | sep = path_sep; |
| 379 | } |
| 380 | } while (*fp++); |
| 381 | } |
| 382 | |
| 383 | /* Destructively turn backslashes into slashes. */ |
| 384 | void |
| 385 | dostounix_filename (p) |
| 386 | register char *p; |
| 387 | { |
| 388 | normalize_filename (p, '/'); |
| 389 | } |
| 390 | |
| 391 | /* Destructively turn slashes into backslashes. */ |
| 392 | void |
| 393 | unixtodos_filename (p) |
| 394 | register char *p; |
| 395 | { |
| 396 | normalize_filename (p, '\\'); |
| 397 | } |
| 398 | |
| 399 | /* Remove all CR's that are followed by a LF. |
| 400 | (From msdos.c...probably should figure out a way to share it, |
| 401 | although this code isn't going to ever change.) */ |
| 402 | int |
| 403 | crlf_to_lf (n, buf) |
| 404 | register int n; |
| 405 | register unsigned char *buf; |
| 406 | { |
| 407 | unsigned char *np = buf; |
| 408 | unsigned char *startp = buf; |
| 409 | unsigned char *endp = buf + n; |
| 410 | |
| 411 | if (n == 0) |
| 412 | return n; |
| 413 | while (buf < endp - 1) |
| 414 | { |
| 415 | if (*buf == 0x0d) |
| 416 | { |
| 417 | if (*(++buf) != 0x0a) |
| 418 | *np++ = 0x0d; |
| 419 | } |
| 420 | else |
| 421 | *np++ = *buf++; |
| 422 | } |
| 423 | if (buf < endp) |
| 424 | *np++ = *buf++; |
| 425 | return np - startp; |
| 426 | } |
| 427 | |
| 428 | /* Parse the root part of file name, if present. Return length and |
| 429 | optionally store pointer to char after root. */ |
| 430 | static int |
| 431 | parse_root (char * name, char ** pPath) |
| 432 | { |
| 433 | char * start = name; |
| 434 | |
| 435 | if (name == NULL) |
| 436 | return 0; |
| 437 | |
| 438 | /* find the root name of the volume if given */ |
| 439 | if (isalpha (name[0]) && name[1] == ':') |
| 440 | { |
| 441 | /* skip past drive specifier */ |
| 442 | name += 2; |
| 443 | if (IS_DIRECTORY_SEP (name[0])) |
| 444 | name++; |
| 445 | } |
| 446 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 447 | { |
| 448 | int slashes = 2; |
| 449 | name += 2; |
| 450 | do |
| 451 | { |
| 452 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 453 | break; |
| 454 | name++; |
| 455 | } |
| 456 | while ( *name ); |
| 457 | if (IS_DIRECTORY_SEP (name[0])) |
| 458 | name++; |
| 459 | } |
| 460 | |
| 461 | if (pPath) |
| 462 | *pPath = name; |
| 463 | |
| 464 | return name - start; |
| 465 | } |
| 466 | |
| 467 | /* Get long base name for name; name is assumed to be absolute. */ |
| 468 | static int |
| 469 | get_long_basename (char * name, char * buf, int size) |
| 470 | { |
| 471 | WIN32_FIND_DATA find_data; |
| 472 | HANDLE dir_handle; |
| 473 | int len = 0; |
| 474 | |
| 475 | /* must be valid filename, no wild cards or other invalid characters */ |
| 476 | if (strpbrk (name, "*?|<>\"")) |
| 477 | return 0; |
| 478 | |
| 479 | dir_handle = FindFirstFile (name, &find_data); |
| 480 | if (dir_handle != INVALID_HANDLE_VALUE) |
| 481 | { |
| 482 | if ((len = strlen (find_data.cFileName)) < size) |
| 483 | memcpy (buf, find_data.cFileName, len + 1); |
| 484 | else |
| 485 | len = 0; |
| 486 | FindClose (dir_handle); |
| 487 | } |
| 488 | return len; |
| 489 | } |
| 490 | |
| 491 | /* Get long name for file, if possible (assumed to be absolute). */ |
| 492 | BOOL |
| 493 | w32_get_long_filename (char * name, char * buf, int size) |
| 494 | { |
| 495 | char * o = buf; |
| 496 | char * p; |
| 497 | char * q; |
| 498 | char full[ MAX_PATH ]; |
| 499 | int len; |
| 500 | |
| 501 | len = strlen (name); |
| 502 | if (len >= MAX_PATH) |
| 503 | return FALSE; |
| 504 | |
| 505 | /* Use local copy for destructive modification. */ |
| 506 | memcpy (full, name, len+1); |
| 507 | unixtodos_filename (full); |
| 508 | |
| 509 | /* Copy root part verbatim. */ |
| 510 | len = parse_root (full, &p); |
| 511 | memcpy (o, full, len); |
| 512 | o += len; |
| 513 | *o = '\0'; |
| 514 | size -= len; |
| 515 | |
| 516 | while (p != NULL && *p) |
| 517 | { |
| 518 | q = p; |
| 519 | p = strchr (q, '\\'); |
| 520 | if (p) *p = '\0'; |
| 521 | len = get_long_basename (full, o, size); |
| 522 | if (len > 0) |
| 523 | { |
| 524 | o += len; |
| 525 | size -= len; |
| 526 | if (p != NULL) |
| 527 | { |
| 528 | *p++ = '\\'; |
| 529 | if (size < 2) |
| 530 | return FALSE; |
| 531 | *o++ = '\\'; |
| 532 | size--; |
| 533 | *o = '\0'; |
| 534 | } |
| 535 | } |
| 536 | else |
| 537 | return FALSE; |
| 538 | } |
| 539 | |
| 540 | return TRUE; |
| 541 | } |
| 542 | |
| 543 | int |
| 544 | is_unc_volume (const char *filename) |
| 545 | { |
| 546 | const char *ptr = filename; |
| 547 | |
| 548 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) |
| 549 | return 0; |
| 550 | |
| 551 | if (strpbrk (ptr + 2, "*?|<>\"\\/")) |
| 552 | return 0; |
| 553 | |
| 554 | return 1; |
| 555 | } |
| 556 | |
| 557 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
| 558 | |
| 559 | int |
| 560 | sigsetmask (int signal_mask) |
| 561 | { |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | int |
| 566 | sigmask (int sig) |
| 567 | { |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | int |
| 572 | sigblock (int sig) |
| 573 | { |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | int |
| 578 | sigunblock (int sig) |
| 579 | { |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | int |
| 584 | setpgrp (int pid, int gid) |
| 585 | { |
| 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | int |
| 590 | alarm (int seconds) |
| 591 | { |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | void |
| 596 | unrequest_sigio (void) |
| 597 | { |
| 598 | return; |
| 599 | } |
| 600 | |
| 601 | void |
| 602 | request_sigio (void) |
| 603 | { |
| 604 | return; |
| 605 | } |
| 606 | |
| 607 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
| 608 | |
| 609 | LPBYTE |
| 610 | w32_get_resource (key, lpdwtype) |
| 611 | char *key; |
| 612 | LPDWORD lpdwtype; |
| 613 | { |
| 614 | LPBYTE lpvalue; |
| 615 | HKEY hrootkey = NULL; |
| 616 | DWORD cbData; |
| 617 | BOOL ok = FALSE; |
| 618 | |
| 619 | /* Check both the current user and the local machine to see if |
| 620 | we have any resources. */ |
| 621 | |
| 622 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 623 | { |
| 624 | lpvalue = NULL; |
| 625 | |
| 626 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 627 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 628 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 629 | { |
| 630 | return (lpvalue); |
| 631 | } |
| 632 | |
| 633 | if (lpvalue) xfree (lpvalue); |
| 634 | |
| 635 | RegCloseKey (hrootkey); |
| 636 | } |
| 637 | |
| 638 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 639 | { |
| 640 | lpvalue = NULL; |
| 641 | |
| 642 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 643 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 644 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 645 | { |
| 646 | return (lpvalue); |
| 647 | } |
| 648 | |
| 649 | if (lpvalue) xfree (lpvalue); |
| 650 | |
| 651 | RegCloseKey (hrootkey); |
| 652 | } |
| 653 | |
| 654 | return (NULL); |
| 655 | } |
| 656 | |
| 657 | char *get_emacs_configuration (void); |
| 658 | extern Lisp_Object Vsystem_configuration; |
| 659 | |
| 660 | void |
| 661 | init_environment (char ** argv) |
| 662 | { |
| 663 | int len; |
| 664 | static const char * const tempdirs[] = { |
| 665 | "$TMPDIR", "$TEMP", "$TMP", "c:/" |
| 666 | }; |
| 667 | int i; |
| 668 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); |
| 669 | |
| 670 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use |
| 671 | temporary files and assume "/tmp" if $TMPDIR is unset, which |
| 672 | will break on DOS/Windows. Refuse to work if we cannot find |
| 673 | a directory, not even "c:/", usable for that purpose. */ |
| 674 | for (i = 0; i < imax ; i++) |
| 675 | { |
| 676 | const char *tmp = tempdirs[i]; |
| 677 | |
| 678 | if (*tmp == '$') |
| 679 | tmp = getenv (tmp + 1); |
| 680 | /* Note that `access' can lie to us if the directory resides on a |
| 681 | read-only filesystem, like CD-ROM or a write-protected floppy. |
| 682 | The only way to be really sure is to actually create a file and |
| 683 | see if it succeeds. But I think that's too much to ask. */ |
| 684 | if (tmp && _access (tmp, D_OK) == 0) |
| 685 | { |
| 686 | char * var = alloca (strlen (tmp) + 8); |
| 687 | sprintf (var, "TMPDIR=%s", tmp); |
| 688 | _putenv (var); |
| 689 | break; |
| 690 | } |
| 691 | } |
| 692 | if (i >= imax) |
| 693 | cmd_error_internal |
| 694 | (Fcons (Qerror, |
| 695 | Fcons (build_string ("no usable temporary directories found!!"), |
| 696 | Qnil)), |
| 697 | "While setting TMPDIR: "); |
| 698 | |
| 699 | /* Check for environment variables and use registry settings if they |
| 700 | don't exist. Fallback on default values where applicable. */ |
| 701 | { |
| 702 | int i; |
| 703 | LPBYTE lpval; |
| 704 | DWORD dwType; |
| 705 | char locale_name[32]; |
| 706 | |
| 707 | static struct env_entry |
| 708 | { |
| 709 | char * name; |
| 710 | char * def_value; |
| 711 | } env_vars[] = |
| 712 | { |
| 713 | {"HOME", "C:/"}, |
| 714 | {"PRELOAD_WINSOCK", NULL}, |
| 715 | {"emacs_dir", "C:/emacs"}, |
| 716 | {"EMACSLOADPATH", "%emacs_dir%/site-lisp;%emacs_dir%/lisp;%emacs_dir%/leim"}, |
| 717 | {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"}, |
| 718 | {"EMACSDATA", "%emacs_dir%/etc"}, |
| 719 | {"EMACSPATH", "%emacs_dir%/bin"}, |
| 720 | {"EMACSLOCKDIR", "%emacs_dir%/lock"}, |
| 721 | /* We no longer set INFOPATH because Info-default-directory-list |
| 722 | is then ignored. */ |
| 723 | /* {"INFOPATH", "%emacs_dir%/info"}, */ |
| 724 | {"EMACSDOC", "%emacs_dir%/etc"}, |
| 725 | {"TERM", "cmd"}, |
| 726 | {"LANG", NULL}, |
| 727 | }; |
| 728 | |
| 729 | /* Get default locale info and use it for LANG. */ |
| 730 | if (GetLocaleInfo (LOCALE_USER_DEFAULT, |
| 731 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, |
| 732 | locale_name, sizeof (locale_name))) |
| 733 | { |
| 734 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 735 | { |
| 736 | if (strcmp (env_vars[i].name, "LANG") == 0) |
| 737 | { |
| 738 | env_vars[i].def_value = locale_name; |
| 739 | break; |
| 740 | } |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | #define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */ |
| 745 | |
| 746 | /* Treat emacs_dir specially: set it unconditionally based on our |
| 747 | location, if it appears that we are running from the bin subdir |
| 748 | of a standard installation. */ |
| 749 | { |
| 750 | char *p; |
| 751 | char modname[MAX_PATH]; |
| 752 | |
| 753 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 754 | abort (); |
| 755 | if ((p = strrchr (modname, '\\')) == NULL) |
| 756 | abort (); |
| 757 | *p = 0; |
| 758 | |
| 759 | if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0) |
| 760 | { |
| 761 | char buf[SET_ENV_BUF_SIZE]; |
| 762 | |
| 763 | *p = 0; |
| 764 | for (p = modname; *p; p++) |
| 765 | if (*p == '\\') *p = '/'; |
| 766 | |
| 767 | _snprintf (buf, sizeof(buf)-1, "emacs_dir=%s", modname); |
| 768 | _putenv (strdup (buf)); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 773 | { |
| 774 | if (!getenv (env_vars[i].name)) |
| 775 | { |
| 776 | int dont_free = 0; |
| 777 | |
| 778 | if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL) |
| 779 | { |
| 780 | lpval = env_vars[i].def_value; |
| 781 | dwType = REG_EXPAND_SZ; |
| 782 | dont_free = 1; |
| 783 | } |
| 784 | |
| 785 | if (lpval) |
| 786 | { |
| 787 | if (dwType == REG_EXPAND_SZ) |
| 788 | { |
| 789 | char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE]; |
| 790 | |
| 791 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof(buf1)); |
| 792 | _snprintf (buf2, sizeof(buf2)-1, "%s=%s", env_vars[i].name, buf1); |
| 793 | _putenv (strdup (buf2)); |
| 794 | } |
| 795 | else if (dwType == REG_SZ) |
| 796 | { |
| 797 | char buf[SET_ENV_BUF_SIZE]; |
| 798 | |
| 799 | _snprintf (buf, sizeof(buf)-1, "%s=%s", env_vars[i].name, lpval); |
| 800 | _putenv (strdup (buf)); |
| 801 | } |
| 802 | |
| 803 | if (!dont_free) |
| 804 | xfree (lpval); |
| 805 | } |
| 806 | } |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | /* Rebuild system configuration to reflect invoking system. */ |
| 811 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); |
| 812 | |
| 813 | /* Another special case: on NT, the PATH variable is actually named |
| 814 | "Path" although cmd.exe (perhaps NT itself) arranges for |
| 815 | environment variable lookup and setting to be case insensitive. |
| 816 | However, Emacs assumes a fully case sensitive environment, so we |
| 817 | need to change "Path" to "PATH" to match the expectations of |
| 818 | various elisp packages. We do this by the sneaky method of |
| 819 | modifying the string in the C runtime environ entry. |
| 820 | |
| 821 | The same applies to COMSPEC. */ |
| 822 | { |
| 823 | char ** envp; |
| 824 | |
| 825 | for (envp = environ; *envp; envp++) |
| 826 | if (_strnicmp (*envp, "PATH=", 5) == 0) |
| 827 | memcpy (*envp, "PATH=", 5); |
| 828 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) |
| 829 | memcpy (*envp, "COMSPEC=", 8); |
| 830 | } |
| 831 | |
| 832 | /* Remember the initial working directory for getwd, then make the |
| 833 | real wd be the location of emacs.exe to avoid conflicts when |
| 834 | renaming or deleting directories. (We also don't call chdir when |
| 835 | running subprocesses for the same reason.) */ |
| 836 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) |
| 837 | abort (); |
| 838 | |
| 839 | { |
| 840 | char *p; |
| 841 | static char modname[MAX_PATH]; |
| 842 | |
| 843 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 844 | abort (); |
| 845 | if ((p = strrchr (modname, '\\')) == NULL) |
| 846 | abort (); |
| 847 | *p = 0; |
| 848 | |
| 849 | SetCurrentDirectory (modname); |
| 850 | |
| 851 | /* Ensure argv[0] has the full path to Emacs. */ |
| 852 | *p = '\\'; |
| 853 | argv[0] = modname; |
| 854 | } |
| 855 | |
| 856 | /* Determine if there is a middle mouse button, to allow parse_button |
| 857 | to decide whether right mouse events should be mouse-2 or |
| 858 | mouse-3. */ |
| 859 | XSETINT (Vw32_num_mouse_buttons, GetSystemMetrics (SM_CMOUSEBUTTONS)); |
| 860 | |
| 861 | init_user_info (); |
| 862 | } |
| 863 | |
| 864 | /* We don't have scripts to automatically determine the system configuration |
| 865 | for Emacs before it's compiled, and we don't want to have to make the |
| 866 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime |
| 867 | routine. */ |
| 868 | |
| 869 | char * |
| 870 | get_emacs_configuration (void) |
| 871 | { |
| 872 | char *arch, *oem, *os; |
| 873 | int build_num; |
| 874 | static char configuration_buffer[32]; |
| 875 | |
| 876 | /* Determine the processor type. */ |
| 877 | switch (get_processor_type ()) |
| 878 | { |
| 879 | |
| 880 | #ifdef PROCESSOR_INTEL_386 |
| 881 | case PROCESSOR_INTEL_386: |
| 882 | case PROCESSOR_INTEL_486: |
| 883 | case PROCESSOR_INTEL_PENTIUM: |
| 884 | arch = "i386"; |
| 885 | break; |
| 886 | #endif |
| 887 | |
| 888 | #ifdef PROCESSOR_INTEL_860 |
| 889 | case PROCESSOR_INTEL_860: |
| 890 | arch = "i860"; |
| 891 | break; |
| 892 | #endif |
| 893 | |
| 894 | #ifdef PROCESSOR_MIPS_R2000 |
| 895 | case PROCESSOR_MIPS_R2000: |
| 896 | case PROCESSOR_MIPS_R3000: |
| 897 | case PROCESSOR_MIPS_R4000: |
| 898 | arch = "mips"; |
| 899 | break; |
| 900 | #endif |
| 901 | |
| 902 | #ifdef PROCESSOR_ALPHA_21064 |
| 903 | case PROCESSOR_ALPHA_21064: |
| 904 | arch = "alpha"; |
| 905 | break; |
| 906 | #endif |
| 907 | |
| 908 | default: |
| 909 | arch = "unknown"; |
| 910 | break; |
| 911 | } |
| 912 | |
| 913 | /* Use the OEM field to reflect the compiler/library combination. */ |
| 914 | #ifdef _MSC_VER |
| 915 | #define COMPILER_NAME "msvc" |
| 916 | #else |
| 917 | #ifdef __GNUC__ |
| 918 | #define COMPILER_NAME "mingw" |
| 919 | #else |
| 920 | #define COMPILER_NAME "unknown" |
| 921 | #endif |
| 922 | #endif |
| 923 | oem = COMPILER_NAME; |
| 924 | |
| 925 | switch (osinfo_cache.dwPlatformId) { |
| 926 | case VER_PLATFORM_WIN32_NT: |
| 927 | os = "nt"; |
| 928 | build_num = osinfo_cache.dwBuildNumber; |
| 929 | break; |
| 930 | case VER_PLATFORM_WIN32_WINDOWS: |
| 931 | if (osinfo_cache.dwMinorVersion == 0) { |
| 932 | os = "windows95"; |
| 933 | } else { |
| 934 | os = "windows98"; |
| 935 | } |
| 936 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 937 | break; |
| 938 | case VER_PLATFORM_WIN32s: |
| 939 | /* Not supported, should not happen. */ |
| 940 | os = "windows32s"; |
| 941 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 942 | break; |
| 943 | default: |
| 944 | os = "unknown"; |
| 945 | build_num = 0; |
| 946 | break; |
| 947 | } |
| 948 | |
| 949 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
| 950 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, |
| 951 | get_w32_major_version (), get_w32_minor_version (), build_num); |
| 952 | } else { |
| 953 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); |
| 954 | } |
| 955 | |
| 956 | return configuration_buffer; |
| 957 | } |
| 958 | |
| 959 | char * |
| 960 | get_emacs_configuration_options (void) |
| 961 | { |
| 962 | static char options_buffer[256]; |
| 963 | |
| 964 | /* Work out the effective configure options for this build. */ |
| 965 | #ifdef _MSC_VER |
| 966 | #define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100 |
| 967 | #else |
| 968 | #ifdef __GNUC__ |
| 969 | #define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__ |
| 970 | #else |
| 971 | #define COMPILER_VERSION "" |
| 972 | #endif |
| 973 | #endif |
| 974 | |
| 975 | sprintf (options_buffer, COMPILER_VERSION); |
| 976 | #ifdef EMACSDEBUG |
| 977 | strcat (options_buffer, " --no-opt"); |
| 978 | #endif |
| 979 | #ifdef USER_CFLAGS |
| 980 | strcat (options_buffer, " --cflags"); |
| 981 | strcat (options_buffer, USER_CFLAGS); |
| 982 | #endif |
| 983 | #ifdef USER_LDFLAGS |
| 984 | strcat (options_buffer, " --ldflags"); |
| 985 | strcat (options_buffer, USER_LDFLAGS); |
| 986 | #endif |
| 987 | return options_buffer; |
| 988 | } |
| 989 | |
| 990 | |
| 991 | #include <sys/timeb.h> |
| 992 | |
| 993 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ |
| 994 | void |
| 995 | gettimeofday (struct timeval *tv, struct timezone *tz) |
| 996 | { |
| 997 | struct timeb tb; |
| 998 | _ftime (&tb); |
| 999 | |
| 1000 | tv->tv_sec = tb.time; |
| 1001 | tv->tv_usec = tb.millitm * 1000L; |
| 1002 | if (tz) |
| 1003 | { |
| 1004 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ |
| 1005 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* ------------------------------------------------------------------------- */ |
| 1010 | /* IO support and wrapper functions for W32 API. */ |
| 1011 | /* ------------------------------------------------------------------------- */ |
| 1012 | |
| 1013 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
| 1014 | on network directories, so we handle that case here. |
| 1015 | (Ulrich Leodolter, 1/11/95). */ |
| 1016 | char * |
| 1017 | sys_ctime (const time_t *t) |
| 1018 | { |
| 1019 | char *str = (char *) ctime (t); |
| 1020 | return (str ? str : "Sun Jan 01 00:00:00 1970"); |
| 1021 | } |
| 1022 | |
| 1023 | /* Emulate sleep...we could have done this with a define, but that |
| 1024 | would necessitate including windows.h in the files that used it. |
| 1025 | This is much easier. */ |
| 1026 | void |
| 1027 | sys_sleep (int seconds) |
| 1028 | { |
| 1029 | Sleep (seconds * 1000); |
| 1030 | } |
| 1031 | |
| 1032 | /* Internal MSVC functions for low-level descriptor munging */ |
| 1033 | extern int __cdecl _set_osfhnd (int fd, long h); |
| 1034 | extern int __cdecl _free_osfhnd (int fd); |
| 1035 | |
| 1036 | /* parallel array of private info on file handles */ |
| 1037 | filedesc fd_info [ MAXDESC ]; |
| 1038 | |
| 1039 | typedef struct volume_info_data { |
| 1040 | struct volume_info_data * next; |
| 1041 | |
| 1042 | /* time when info was obtained */ |
| 1043 | DWORD timestamp; |
| 1044 | |
| 1045 | /* actual volume info */ |
| 1046 | char * root_dir; |
| 1047 | DWORD serialnum; |
| 1048 | DWORD maxcomp; |
| 1049 | DWORD flags; |
| 1050 | char * name; |
| 1051 | char * type; |
| 1052 | } volume_info_data; |
| 1053 | |
| 1054 | /* Global referenced by various functions. */ |
| 1055 | static volume_info_data volume_info; |
| 1056 | |
| 1057 | /* Vector to indicate which drives are local and fixed (for which cached |
| 1058 | data never expires). */ |
| 1059 | static BOOL fixed_drives[26]; |
| 1060 | |
| 1061 | /* Consider cached volume information to be stale if older than 10s, |
| 1062 | at least for non-local drives. Info for fixed drives is never stale. */ |
| 1063 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) |
| 1064 | #define VOLINFO_STILL_VALID( root_dir, info ) \ |
| 1065 | ( ( isalpha (root_dir[0]) && \ |
| 1066 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ |
| 1067 | || GetTickCount () - info->timestamp < 10000 ) |
| 1068 | |
| 1069 | /* Cache support functions. */ |
| 1070 | |
| 1071 | /* Simple linked list with linear search is sufficient. */ |
| 1072 | static volume_info_data *volume_cache = NULL; |
| 1073 | |
| 1074 | static volume_info_data * |
| 1075 | lookup_volume_info (char * root_dir) |
| 1076 | { |
| 1077 | volume_info_data * info; |
| 1078 | |
| 1079 | for (info = volume_cache; info; info = info->next) |
| 1080 | if (stricmp (info->root_dir, root_dir) == 0) |
| 1081 | break; |
| 1082 | return info; |
| 1083 | } |
| 1084 | |
| 1085 | static void |
| 1086 | add_volume_info (char * root_dir, volume_info_data * info) |
| 1087 | { |
| 1088 | info->root_dir = xstrdup (root_dir); |
| 1089 | info->next = volume_cache; |
| 1090 | volume_cache = info; |
| 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | /* Wrapper for GetVolumeInformation, which uses caching to avoid |
| 1095 | performance penalty (~2ms on 486 for local drives, 7.5ms for local |
| 1096 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ |
| 1097 | volume_info_data * |
| 1098 | GetCachedVolumeInformation (char * root_dir) |
| 1099 | { |
| 1100 | volume_info_data * info; |
| 1101 | char default_root[ MAX_PATH ]; |
| 1102 | |
| 1103 | /* NULL for root_dir means use root from current directory. */ |
| 1104 | if (root_dir == NULL) |
| 1105 | { |
| 1106 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) |
| 1107 | return NULL; |
| 1108 | parse_root (default_root, &root_dir); |
| 1109 | *root_dir = 0; |
| 1110 | root_dir = default_root; |
| 1111 | } |
| 1112 | |
| 1113 | /* Local fixed drives can be cached permanently. Removable drives |
| 1114 | cannot be cached permanently, since the volume name and serial |
| 1115 | number (if nothing else) can change. Remote drives should be |
| 1116 | treated as if they are removable, since there is no sure way to |
| 1117 | tell whether they are or not. Also, the UNC association of drive |
| 1118 | letters mapped to remote volumes can be changed at any time (even |
| 1119 | by other processes) without notice. |
| 1120 | |
| 1121 | As a compromise, so we can benefit from caching info for remote |
| 1122 | volumes, we use a simple expiry mechanism to invalidate cache |
| 1123 | entries that are more than ten seconds old. */ |
| 1124 | |
| 1125 | #if 0 |
| 1126 | /* No point doing this, because WNetGetConnection is even slower than |
| 1127 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, |
| 1128 | GetDriveType is about the only call of this type which does not |
| 1129 | involve network access, and so is extremely quick). */ |
| 1130 | |
| 1131 | /* Map drive letter to UNC if remote. */ |
| 1132 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) |
| 1133 | { |
| 1134 | char remote_name[ 256 ]; |
| 1135 | char drive[3] = { root_dir[0], ':' }; |
| 1136 | |
| 1137 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) |
| 1138 | == NO_ERROR) |
| 1139 | /* do something */ ; |
| 1140 | } |
| 1141 | #endif |
| 1142 | |
| 1143 | info = lookup_volume_info (root_dir); |
| 1144 | |
| 1145 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) |
| 1146 | { |
| 1147 | char name[ 256 ]; |
| 1148 | DWORD serialnum; |
| 1149 | DWORD maxcomp; |
| 1150 | DWORD flags; |
| 1151 | char type[ 256 ]; |
| 1152 | |
| 1153 | /* Info is not cached, or is stale. */ |
| 1154 | if (!GetVolumeInformation (root_dir, |
| 1155 | name, sizeof (name), |
| 1156 | &serialnum, |
| 1157 | &maxcomp, |
| 1158 | &flags, |
| 1159 | type, sizeof (type))) |
| 1160 | return NULL; |
| 1161 | |
| 1162 | /* Cache the volume information for future use, overwriting existing |
| 1163 | entry if present. */ |
| 1164 | if (info == NULL) |
| 1165 | { |
| 1166 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); |
| 1167 | add_volume_info (root_dir, info); |
| 1168 | } |
| 1169 | else |
| 1170 | { |
| 1171 | xfree (info->name); |
| 1172 | xfree (info->type); |
| 1173 | } |
| 1174 | |
| 1175 | info->name = xstrdup (name); |
| 1176 | info->serialnum = serialnum; |
| 1177 | info->maxcomp = maxcomp; |
| 1178 | info->flags = flags; |
| 1179 | info->type = xstrdup (type); |
| 1180 | info->timestamp = GetTickCount (); |
| 1181 | } |
| 1182 | |
| 1183 | return info; |
| 1184 | } |
| 1185 | |
| 1186 | /* Get information on the volume where name is held; set path pointer to |
| 1187 | start of pathname in name (past UNC header\volume header if present). */ |
| 1188 | int |
| 1189 | get_volume_info (const char * name, const char ** pPath) |
| 1190 | { |
| 1191 | char temp[MAX_PATH]; |
| 1192 | char *rootname = NULL; /* default to current volume */ |
| 1193 | volume_info_data * info; |
| 1194 | |
| 1195 | if (name == NULL) |
| 1196 | return FALSE; |
| 1197 | |
| 1198 | /* find the root name of the volume if given */ |
| 1199 | if (isalpha (name[0]) && name[1] == ':') |
| 1200 | { |
| 1201 | rootname = temp; |
| 1202 | temp[0] = *name++; |
| 1203 | temp[1] = *name++; |
| 1204 | temp[2] = '\\'; |
| 1205 | temp[3] = 0; |
| 1206 | } |
| 1207 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 1208 | { |
| 1209 | char *str = temp; |
| 1210 | int slashes = 4; |
| 1211 | rootname = temp; |
| 1212 | do |
| 1213 | { |
| 1214 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 1215 | break; |
| 1216 | *str++ = *name++; |
| 1217 | } |
| 1218 | while ( *name ); |
| 1219 | |
| 1220 | *str++ = '\\'; |
| 1221 | *str = 0; |
| 1222 | } |
| 1223 | |
| 1224 | if (pPath) |
| 1225 | *pPath = name; |
| 1226 | |
| 1227 | info = GetCachedVolumeInformation (rootname); |
| 1228 | if (info != NULL) |
| 1229 | { |
| 1230 | /* Set global referenced by other functions. */ |
| 1231 | volume_info = *info; |
| 1232 | return TRUE; |
| 1233 | } |
| 1234 | return FALSE; |
| 1235 | } |
| 1236 | |
| 1237 | /* Determine if volume is FAT format (ie. only supports short 8.3 |
| 1238 | names); also set path pointer to start of pathname in name. */ |
| 1239 | int |
| 1240 | is_fat_volume (const char * name, const char ** pPath) |
| 1241 | { |
| 1242 | if (get_volume_info (name, pPath)) |
| 1243 | return (volume_info.maxcomp == 12); |
| 1244 | return FALSE; |
| 1245 | } |
| 1246 | |
| 1247 | /* Map filename to a legal 8.3 name if necessary. */ |
| 1248 | const char * |
| 1249 | map_w32_filename (const char * name, const char ** pPath) |
| 1250 | { |
| 1251 | static char shortname[MAX_PATH]; |
| 1252 | char * str = shortname; |
| 1253 | char c; |
| 1254 | char * path; |
| 1255 | const char * save_name = name; |
| 1256 | |
| 1257 | if (strlen (name) >= MAX_PATH) |
| 1258 | { |
| 1259 | /* Return a filename which will cause callers to fail. */ |
| 1260 | strcpy (shortname, "?"); |
| 1261 | return shortname; |
| 1262 | } |
| 1263 | |
| 1264 | if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */ |
| 1265 | { |
| 1266 | register int left = 8; /* maximum number of chars in part */ |
| 1267 | register int extn = 0; /* extension added? */ |
| 1268 | register int dots = 2; /* maximum number of dots allowed */ |
| 1269 | |
| 1270 | while (name < path) |
| 1271 | *str++ = *name++; /* skip past UNC header */ |
| 1272 | |
| 1273 | while ((c = *name++)) |
| 1274 | { |
| 1275 | switch ( c ) |
| 1276 | { |
| 1277 | case '\\': |
| 1278 | case '/': |
| 1279 | *str++ = '\\'; |
| 1280 | extn = 0; /* reset extension flags */ |
| 1281 | dots = 2; /* max 2 dots */ |
| 1282 | left = 8; /* max length 8 for main part */ |
| 1283 | break; |
| 1284 | case ':': |
| 1285 | *str++ = ':'; |
| 1286 | extn = 0; /* reset extension flags */ |
| 1287 | dots = 2; /* max 2 dots */ |
| 1288 | left = 8; /* max length 8 for main part */ |
| 1289 | break; |
| 1290 | case '.': |
| 1291 | if ( dots ) |
| 1292 | { |
| 1293 | /* Convert path components of the form .xxx to _xxx, |
| 1294 | but leave . and .. as they are. This allows .emacs |
| 1295 | to be read as _emacs, for example. */ |
| 1296 | |
| 1297 | if (! *name || |
| 1298 | *name == '.' || |
| 1299 | IS_DIRECTORY_SEP (*name)) |
| 1300 | { |
| 1301 | *str++ = '.'; |
| 1302 | dots--; |
| 1303 | } |
| 1304 | else |
| 1305 | { |
| 1306 | *str++ = '_'; |
| 1307 | left--; |
| 1308 | dots = 0; |
| 1309 | } |
| 1310 | } |
| 1311 | else if ( !extn ) |
| 1312 | { |
| 1313 | *str++ = '.'; |
| 1314 | extn = 1; /* we've got an extension */ |
| 1315 | left = 3; /* 3 chars in extension */ |
| 1316 | } |
| 1317 | else |
| 1318 | { |
| 1319 | /* any embedded dots after the first are converted to _ */ |
| 1320 | *str++ = '_'; |
| 1321 | } |
| 1322 | break; |
| 1323 | case '~': |
| 1324 | case '#': /* don't lose these, they're important */ |
| 1325 | if ( ! left ) |
| 1326 | str[-1] = c; /* replace last character of part */ |
| 1327 | /* FALLTHRU */ |
| 1328 | default: |
| 1329 | if ( left ) |
| 1330 | { |
| 1331 | *str++ = tolower (c); /* map to lower case (looks nicer) */ |
| 1332 | left--; |
| 1333 | dots = 0; /* started a path component */ |
| 1334 | } |
| 1335 | break; |
| 1336 | } |
| 1337 | } |
| 1338 | *str = '\0'; |
| 1339 | } |
| 1340 | else |
| 1341 | { |
| 1342 | strcpy (shortname, name); |
| 1343 | unixtodos_filename (shortname); |
| 1344 | } |
| 1345 | |
| 1346 | if (pPath) |
| 1347 | *pPath = shortname + (path - save_name); |
| 1348 | |
| 1349 | return shortname; |
| 1350 | } |
| 1351 | |
| 1352 | static int |
| 1353 | is_exec (const char * name) |
| 1354 | { |
| 1355 | char * p = strrchr (name, '.'); |
| 1356 | return |
| 1357 | (p != NULL |
| 1358 | && (stricmp (p, ".exe") == 0 || |
| 1359 | stricmp (p, ".com") == 0 || |
| 1360 | stricmp (p, ".bat") == 0 || |
| 1361 | stricmp (p, ".cmd") == 0)); |
| 1362 | } |
| 1363 | |
| 1364 | /* Emulate the Unix directory procedures opendir, closedir, |
| 1365 | and readdir. We can't use the procedures supplied in sysdep.c, |
| 1366 | so we provide them here. */ |
| 1367 | |
| 1368 | struct direct dir_static; /* simulated directory contents */ |
| 1369 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; |
| 1370 | static int dir_is_fat; |
| 1371 | static char dir_pathname[MAXPATHLEN+1]; |
| 1372 | static WIN32_FIND_DATA dir_find_data; |
| 1373 | |
| 1374 | /* Support shares on a network resource as subdirectories of a read-only |
| 1375 | root directory. */ |
| 1376 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 1377 | HANDLE open_unc_volume (char *); |
| 1378 | char *read_unc_volume (HANDLE, char *, int); |
| 1379 | void close_unc_volume (HANDLE); |
| 1380 | |
| 1381 | DIR * |
| 1382 | opendir (char *filename) |
| 1383 | { |
| 1384 | DIR *dirp; |
| 1385 | |
| 1386 | /* Opening is done by FindFirstFile. However, a read is inherent to |
| 1387 | this operation, so we defer the open until read time. */ |
| 1388 | |
| 1389 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1390 | return NULL; |
| 1391 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1392 | return NULL; |
| 1393 | |
| 1394 | if (is_unc_volume (filename)) |
| 1395 | { |
| 1396 | wnet_enum_handle = open_unc_volume (filename); |
| 1397 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) |
| 1398 | return NULL; |
| 1399 | } |
| 1400 | |
| 1401 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) |
| 1402 | return NULL; |
| 1403 | |
| 1404 | dirp->dd_fd = 0; |
| 1405 | dirp->dd_loc = 0; |
| 1406 | dirp->dd_size = 0; |
| 1407 | |
| 1408 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); |
| 1409 | dir_pathname[MAXPATHLEN] = '\0'; |
| 1410 | dir_is_fat = is_fat_volume (filename, NULL); |
| 1411 | |
| 1412 | return dirp; |
| 1413 | } |
| 1414 | |
| 1415 | void |
| 1416 | closedir (DIR *dirp) |
| 1417 | { |
| 1418 | /* If we have a find-handle open, close it. */ |
| 1419 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1420 | { |
| 1421 | FindClose (dir_find_handle); |
| 1422 | dir_find_handle = INVALID_HANDLE_VALUE; |
| 1423 | } |
| 1424 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1425 | { |
| 1426 | close_unc_volume (wnet_enum_handle); |
| 1427 | wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 1428 | } |
| 1429 | xfree ((char *) dirp); |
| 1430 | } |
| 1431 | |
| 1432 | struct direct * |
| 1433 | readdir (DIR *dirp) |
| 1434 | { |
| 1435 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1436 | { |
| 1437 | if (!read_unc_volume (wnet_enum_handle, |
| 1438 | dir_find_data.cFileName, |
| 1439 | MAX_PATH)) |
| 1440 | return NULL; |
| 1441 | } |
| 1442 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
| 1443 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1444 | { |
| 1445 | char filename[MAXNAMLEN + 3]; |
| 1446 | int ln; |
| 1447 | |
| 1448 | strcpy (filename, dir_pathname); |
| 1449 | ln = strlen (filename) - 1; |
| 1450 | if (!IS_DIRECTORY_SEP (filename[ln])) |
| 1451 | strcat (filename, "\\"); |
| 1452 | strcat (filename, "*"); |
| 1453 | |
| 1454 | dir_find_handle = FindFirstFile (filename, &dir_find_data); |
| 1455 | |
| 1456 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1457 | return NULL; |
| 1458 | } |
| 1459 | else |
| 1460 | { |
| 1461 | if (!FindNextFile (dir_find_handle, &dir_find_data)) |
| 1462 | return NULL; |
| 1463 | } |
| 1464 | |
| 1465 | /* Emacs never uses this value, so don't bother making it match |
| 1466 | value returned by stat(). */ |
| 1467 | dir_static.d_ino = 1; |
| 1468 | |
| 1469 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + |
| 1470 | dir_static.d_namlen - dir_static.d_namlen % 4; |
| 1471 | |
| 1472 | dir_static.d_namlen = strlen (dir_find_data.cFileName); |
| 1473 | strcpy (dir_static.d_name, dir_find_data.cFileName); |
| 1474 | if (dir_is_fat) |
| 1475 | _strlwr (dir_static.d_name); |
| 1476 | else if (!NILP (Vw32_downcase_file_names)) |
| 1477 | { |
| 1478 | register char *p; |
| 1479 | for (p = dir_static.d_name; *p; p++) |
| 1480 | if (*p >= 'a' && *p <= 'z') |
| 1481 | break; |
| 1482 | if (!*p) |
| 1483 | _strlwr (dir_static.d_name); |
| 1484 | } |
| 1485 | |
| 1486 | return &dir_static; |
| 1487 | } |
| 1488 | |
| 1489 | HANDLE |
| 1490 | open_unc_volume (char *path) |
| 1491 | { |
| 1492 | NETRESOURCE nr; |
| 1493 | HANDLE henum; |
| 1494 | int result; |
| 1495 | |
| 1496 | nr.dwScope = RESOURCE_GLOBALNET; |
| 1497 | nr.dwType = RESOURCETYPE_DISK; |
| 1498 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; |
| 1499 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; |
| 1500 | nr.lpLocalName = NULL; |
| 1501 | nr.lpRemoteName = map_w32_filename (path, NULL); |
| 1502 | nr.lpComment = NULL; |
| 1503 | nr.lpProvider = NULL; |
| 1504 | |
| 1505 | result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK, |
| 1506 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); |
| 1507 | |
| 1508 | if (result == NO_ERROR) |
| 1509 | return henum; |
| 1510 | else |
| 1511 | return INVALID_HANDLE_VALUE; |
| 1512 | } |
| 1513 | |
| 1514 | char * |
| 1515 | read_unc_volume (HANDLE henum, char *readbuf, int size) |
| 1516 | { |
| 1517 | DWORD count; |
| 1518 | int result; |
| 1519 | DWORD bufsize = 512; |
| 1520 | char *buffer; |
| 1521 | char *ptr; |
| 1522 | |
| 1523 | count = 1; |
| 1524 | buffer = alloca (bufsize); |
| 1525 | result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize); |
| 1526 | if (result != NO_ERROR) |
| 1527 | return NULL; |
| 1528 | |
| 1529 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ |
| 1530 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; |
| 1531 | ptr += 2; |
| 1532 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; |
| 1533 | ptr++; |
| 1534 | |
| 1535 | strncpy (readbuf, ptr, size); |
| 1536 | return readbuf; |
| 1537 | } |
| 1538 | |
| 1539 | void |
| 1540 | close_unc_volume (HANDLE henum) |
| 1541 | { |
| 1542 | if (henum != INVALID_HANDLE_VALUE) |
| 1543 | WNetCloseEnum (henum); |
| 1544 | } |
| 1545 | |
| 1546 | DWORD |
| 1547 | unc_volume_file_attributes (char *path) |
| 1548 | { |
| 1549 | HANDLE henum; |
| 1550 | DWORD attrs; |
| 1551 | |
| 1552 | henum = open_unc_volume (path); |
| 1553 | if (henum == INVALID_HANDLE_VALUE) |
| 1554 | return -1; |
| 1555 | |
| 1556 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; |
| 1557 | |
| 1558 | close_unc_volume (henum); |
| 1559 | |
| 1560 | return attrs; |
| 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | /* Shadow some MSVC runtime functions to map requests for long filenames |
| 1565 | to reasonable short names if necessary. This was originally added to |
| 1566 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support |
| 1567 | long file names. */ |
| 1568 | |
| 1569 | int |
| 1570 | sys_access (const char * path, int mode) |
| 1571 | { |
| 1572 | DWORD attributes; |
| 1573 | |
| 1574 | /* MSVC implementation doesn't recognize D_OK. */ |
| 1575 | path = map_w32_filename (path, NULL); |
| 1576 | if (is_unc_volume (path)) |
| 1577 | { |
| 1578 | attributes = unc_volume_file_attributes (path); |
| 1579 | if (attributes == -1) { |
| 1580 | errno = EACCES; |
| 1581 | return -1; |
| 1582 | } |
| 1583 | } |
| 1584 | else if ((attributes = GetFileAttributes (path)) == -1) |
| 1585 | { |
| 1586 | /* Should try mapping GetLastError to errno; for now just indicate |
| 1587 | that path doesn't exist. */ |
| 1588 | errno = EACCES; |
| 1589 | return -1; |
| 1590 | } |
| 1591 | if ((mode & X_OK) != 0 && !is_exec (path)) |
| 1592 | { |
| 1593 | errno = EACCES; |
| 1594 | return -1; |
| 1595 | } |
| 1596 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) |
| 1597 | { |
| 1598 | errno = EACCES; |
| 1599 | return -1; |
| 1600 | } |
| 1601 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) |
| 1602 | { |
| 1603 | errno = EACCES; |
| 1604 | return -1; |
| 1605 | } |
| 1606 | return 0; |
| 1607 | } |
| 1608 | |
| 1609 | int |
| 1610 | sys_chdir (const char * path) |
| 1611 | { |
| 1612 | return _chdir (map_w32_filename (path, NULL)); |
| 1613 | } |
| 1614 | |
| 1615 | int |
| 1616 | sys_chmod (const char * path, int mode) |
| 1617 | { |
| 1618 | return _chmod (map_w32_filename (path, NULL), mode); |
| 1619 | } |
| 1620 | |
| 1621 | int |
| 1622 | sys_creat (const char * path, int mode) |
| 1623 | { |
| 1624 | return _creat (map_w32_filename (path, NULL), mode); |
| 1625 | } |
| 1626 | |
| 1627 | FILE * |
| 1628 | sys_fopen(const char * path, const char * mode) |
| 1629 | { |
| 1630 | int fd; |
| 1631 | int oflag; |
| 1632 | const char * mode_save = mode; |
| 1633 | |
| 1634 | /* Force all file handles to be non-inheritable. This is necessary to |
| 1635 | ensure child processes don't unwittingly inherit handles that might |
| 1636 | prevent future file access. */ |
| 1637 | |
| 1638 | if (mode[0] == 'r') |
| 1639 | oflag = O_RDONLY; |
| 1640 | else if (mode[0] == 'w' || mode[0] == 'a') |
| 1641 | oflag = O_WRONLY | O_CREAT | O_TRUNC; |
| 1642 | else |
| 1643 | return NULL; |
| 1644 | |
| 1645 | /* Only do simplistic option parsing. */ |
| 1646 | while (*++mode) |
| 1647 | if (mode[0] == '+') |
| 1648 | { |
| 1649 | oflag &= ~(O_RDONLY | O_WRONLY); |
| 1650 | oflag |= O_RDWR; |
| 1651 | } |
| 1652 | else if (mode[0] == 'b') |
| 1653 | { |
| 1654 | oflag &= ~O_TEXT; |
| 1655 | oflag |= O_BINARY; |
| 1656 | } |
| 1657 | else if (mode[0] == 't') |
| 1658 | { |
| 1659 | oflag &= ~O_BINARY; |
| 1660 | oflag |= O_TEXT; |
| 1661 | } |
| 1662 | else break; |
| 1663 | |
| 1664 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
| 1665 | if (fd < 0) |
| 1666 | return NULL; |
| 1667 | |
| 1668 | return _fdopen (fd, mode_save); |
| 1669 | } |
| 1670 | |
| 1671 | /* This only works on NTFS volumes, but is useful to have. */ |
| 1672 | int |
| 1673 | sys_link (const char * old, const char * new) |
| 1674 | { |
| 1675 | HANDLE fileh; |
| 1676 | int result = -1; |
| 1677 | char oldname[MAX_PATH], newname[MAX_PATH]; |
| 1678 | |
| 1679 | if (old == NULL || new == NULL) |
| 1680 | { |
| 1681 | errno = ENOENT; |
| 1682 | return -1; |
| 1683 | } |
| 1684 | |
| 1685 | strcpy (oldname, map_w32_filename (old, NULL)); |
| 1686 | strcpy (newname, map_w32_filename (new, NULL)); |
| 1687 | |
| 1688 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, |
| 1689 | FILE_FLAG_BACKUP_SEMANTICS, NULL); |
| 1690 | if (fileh != INVALID_HANDLE_VALUE) |
| 1691 | { |
| 1692 | int wlen; |
| 1693 | |
| 1694 | /* Confusingly, the "alternate" stream name field does not apply |
| 1695 | when restoring a hard link, and instead contains the actual |
| 1696 | stream data for the link (ie. the name of the link to create). |
| 1697 | The WIN32_STREAM_ID structure before the cStreamName field is |
| 1698 | the stream header, which is then immediately followed by the |
| 1699 | stream data. */ |
| 1700 | |
| 1701 | struct { |
| 1702 | WIN32_STREAM_ID wid; |
| 1703 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ |
| 1704 | } data; |
| 1705 | |
| 1706 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, |
| 1707 | data.wid.cStreamName, MAX_PATH); |
| 1708 | if (wlen > 0) |
| 1709 | { |
| 1710 | LPVOID context = NULL; |
| 1711 | DWORD wbytes = 0; |
| 1712 | |
| 1713 | data.wid.dwStreamId = BACKUP_LINK; |
| 1714 | data.wid.dwStreamAttributes = 0; |
| 1715 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); |
| 1716 | data.wid.Size.HighPart = 0; |
| 1717 | data.wid.dwStreamNameSize = 0; |
| 1718 | |
| 1719 | if (BackupWrite (fileh, (LPBYTE)&data, |
| 1720 | offsetof (WIN32_STREAM_ID, cStreamName) |
| 1721 | + data.wid.Size.LowPart, |
| 1722 | &wbytes, FALSE, FALSE, &context) |
| 1723 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) |
| 1724 | { |
| 1725 | /* succeeded */ |
| 1726 | result = 0; |
| 1727 | } |
| 1728 | else |
| 1729 | { |
| 1730 | /* Should try mapping GetLastError to errno; for now just |
| 1731 | indicate a general error (eg. links not supported). */ |
| 1732 | errno = EINVAL; // perhaps EMLINK? |
| 1733 | } |
| 1734 | } |
| 1735 | |
| 1736 | CloseHandle (fileh); |
| 1737 | } |
| 1738 | else |
| 1739 | errno = ENOENT; |
| 1740 | |
| 1741 | return result; |
| 1742 | } |
| 1743 | |
| 1744 | int |
| 1745 | sys_mkdir (const char * path) |
| 1746 | { |
| 1747 | return _mkdir (map_w32_filename (path, NULL)); |
| 1748 | } |
| 1749 | |
| 1750 | /* Because of long name mapping issues, we need to implement this |
| 1751 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate |
| 1752 | a unique name, instead of setting the input template to an empty |
| 1753 | string. |
| 1754 | |
| 1755 | Standard algorithm seems to be use pid or tid with a letter on the |
| 1756 | front (in place of the 6 X's) and cycle through the letters to find a |
| 1757 | unique name. We extend that to allow any reasonable character as the |
| 1758 | first of the 6 X's. */ |
| 1759 | char * |
| 1760 | sys_mktemp (char * template) |
| 1761 | { |
| 1762 | char * p; |
| 1763 | int i; |
| 1764 | unsigned uid = GetCurrentThreadId (); |
| 1765 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; |
| 1766 | |
| 1767 | if (template == NULL) |
| 1768 | return NULL; |
| 1769 | p = template + strlen (template); |
| 1770 | i = 5; |
| 1771 | /* replace up to the last 5 X's with uid in decimal */ |
| 1772 | while (--p >= template && p[0] == 'X' && --i >= 0) |
| 1773 | { |
| 1774 | p[0] = '0' + uid % 10; |
| 1775 | uid /= 10; |
| 1776 | } |
| 1777 | |
| 1778 | if (i < 0 && p[0] == 'X') |
| 1779 | { |
| 1780 | i = 0; |
| 1781 | do |
| 1782 | { |
| 1783 | int save_errno = errno; |
| 1784 | p[0] = first_char[i]; |
| 1785 | if (sys_access (template, 0) < 0) |
| 1786 | { |
| 1787 | errno = save_errno; |
| 1788 | return template; |
| 1789 | } |
| 1790 | } |
| 1791 | while (++i < sizeof (first_char)); |
| 1792 | } |
| 1793 | |
| 1794 | /* Template is badly formed or else we can't generate a unique name, |
| 1795 | so return empty string */ |
| 1796 | template[0] = 0; |
| 1797 | return template; |
| 1798 | } |
| 1799 | |
| 1800 | int |
| 1801 | sys_open (const char * path, int oflag, int mode) |
| 1802 | { |
| 1803 | /* Force all file handles to be non-inheritable. */ |
| 1804 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
| 1805 | } |
| 1806 | |
| 1807 | int |
| 1808 | sys_rename (const char * oldname, const char * newname) |
| 1809 | { |
| 1810 | int result; |
| 1811 | char temp[MAX_PATH]; |
| 1812 | |
| 1813 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
| 1814 | alias in a number of circumstances (it is not easy to predict when |
| 1815 | just by looking at oldname and newname, unfortunately). In these |
| 1816 | cases, renaming through a temporary name avoids the problem. |
| 1817 | |
| 1818 | A second problem on Windows 95 is that renaming through a temp name when |
| 1819 | newname is uppercase fails (the final long name ends up in |
| 1820 | lowercase, although the short alias might be uppercase) UNLESS the |
| 1821 | long temp name is not 8.3. |
| 1822 | |
| 1823 | So, on Windows 95 we always rename through a temp name, and we make sure |
| 1824 | the temp name has a long extension to ensure correct renaming. */ |
| 1825 | |
| 1826 | strcpy (temp, map_w32_filename (oldname, NULL)); |
| 1827 | |
| 1828 | if (os_subtype == OS_WIN95) |
| 1829 | { |
| 1830 | char * o; |
| 1831 | char * p; |
| 1832 | int i = 0; |
| 1833 | |
| 1834 | oldname = map_w32_filename (oldname, NULL); |
| 1835 | if (o = strrchr (oldname, '\\')) |
| 1836 | o++; |
| 1837 | else |
| 1838 | o = (char *) oldname; |
| 1839 | |
| 1840 | if (p = strrchr (temp, '\\')) |
| 1841 | p++; |
| 1842 | else |
| 1843 | p = temp; |
| 1844 | |
| 1845 | do |
| 1846 | { |
| 1847 | /* Force temp name to require a manufactured 8.3 alias - this |
| 1848 | seems to make the second rename work properly. */ |
| 1849 | sprintf (p, "_.%s.%u", o, i); |
| 1850 | i++; |
| 1851 | result = rename (oldname, temp); |
| 1852 | } |
| 1853 | /* This loop must surely terminate! */ |
| 1854 | while (result < 0 && (errno == EEXIST || errno == EACCES)); |
| 1855 | if (result < 0) |
| 1856 | return -1; |
| 1857 | } |
| 1858 | |
| 1859 | /* Emulate Unix behaviour - newname is deleted if it already exists |
| 1860 | (at least if it is a file; don't do this for directories). |
| 1861 | |
| 1862 | Since we mustn't do this if we are just changing the case of the |
| 1863 | file name (we would end up deleting the file we are trying to |
| 1864 | rename!), we let rename detect if the destination file already |
| 1865 | exists - that way we avoid the possible pitfalls of trying to |
| 1866 | determine ourselves whether two names really refer to the same |
| 1867 | file, which is not always possible in the general case. (Consider |
| 1868 | all the permutations of shared or subst'd drives, etc.) */ |
| 1869 | |
| 1870 | newname = map_w32_filename (newname, NULL); |
| 1871 | result = rename (temp, newname); |
| 1872 | |
| 1873 | if (result < 0 |
| 1874 | && (errno == EEXIST || errno == EACCES) |
| 1875 | && _chmod (newname, 0666) == 0 |
| 1876 | && _unlink (newname) == 0) |
| 1877 | result = rename (temp, newname); |
| 1878 | |
| 1879 | return result; |
| 1880 | } |
| 1881 | |
| 1882 | int |
| 1883 | sys_rmdir (const char * path) |
| 1884 | { |
| 1885 | return _rmdir (map_w32_filename (path, NULL)); |
| 1886 | } |
| 1887 | |
| 1888 | int |
| 1889 | sys_unlink (const char * path) |
| 1890 | { |
| 1891 | path = map_w32_filename (path, NULL); |
| 1892 | |
| 1893 | /* On Unix, unlink works without write permission. */ |
| 1894 | _chmod (path, 0666); |
| 1895 | return _unlink (path); |
| 1896 | } |
| 1897 | |
| 1898 | static FILETIME utc_base_ft; |
| 1899 | static long double utc_base; |
| 1900 | static int init = 0; |
| 1901 | |
| 1902 | static time_t |
| 1903 | convert_time (FILETIME ft) |
| 1904 | { |
| 1905 | long double ret; |
| 1906 | |
| 1907 | if (!init) |
| 1908 | { |
| 1909 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1910 | SYSTEMTIME st; |
| 1911 | |
| 1912 | st.wYear = 1970; |
| 1913 | st.wMonth = 1; |
| 1914 | st.wDay = 1; |
| 1915 | st.wHour = 0; |
| 1916 | st.wMinute = 0; |
| 1917 | st.wSecond = 0; |
| 1918 | st.wMilliseconds = 0; |
| 1919 | |
| 1920 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1921 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1922 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1923 | init = 1; |
| 1924 | } |
| 1925 | |
| 1926 | if (CompareFileTime (&ft, &utc_base_ft) < 0) |
| 1927 | return 0; |
| 1928 | |
| 1929 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; |
| 1930 | ret -= utc_base; |
| 1931 | return (time_t) (ret * 1e-7); |
| 1932 | } |
| 1933 | |
| 1934 | void |
| 1935 | convert_from_time_t (time_t time, FILETIME * pft) |
| 1936 | { |
| 1937 | long double tmp; |
| 1938 | |
| 1939 | if (!init) |
| 1940 | { |
| 1941 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1942 | SYSTEMTIME st; |
| 1943 | |
| 1944 | st.wYear = 1970; |
| 1945 | st.wMonth = 1; |
| 1946 | st.wDay = 1; |
| 1947 | st.wHour = 0; |
| 1948 | st.wMinute = 0; |
| 1949 | st.wSecond = 0; |
| 1950 | st.wMilliseconds = 0; |
| 1951 | |
| 1952 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1953 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1954 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1955 | init = 1; |
| 1956 | } |
| 1957 | |
| 1958 | /* time in 100ns units since 1-Jan-1601 */ |
| 1959 | tmp = (long double) time * 1e7 + utc_base; |
| 1960 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); |
| 1961 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
| 1962 | } |
| 1963 | |
| 1964 | #if 0 |
| 1965 | /* No reason to keep this; faking inode values either by hashing or even |
| 1966 | using the file index from GetInformationByHandle, is not perfect and |
| 1967 | so by default Emacs doesn't use the inode values on Windows. |
| 1968 | Instead, we now determine file-truename correctly (except for |
| 1969 | possible drive aliasing etc). */ |
| 1970 | |
| 1971 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ |
| 1972 | static unsigned |
| 1973 | hashval (const unsigned char * str) |
| 1974 | { |
| 1975 | unsigned h = 0; |
| 1976 | while (*str) |
| 1977 | { |
| 1978 | h = (h << 4) + *str++; |
| 1979 | h ^= (h >> 28); |
| 1980 | } |
| 1981 | return h; |
| 1982 | } |
| 1983 | |
| 1984 | /* Return the hash value of the canonical pathname, excluding the |
| 1985 | drive/UNC header, to get a hopefully unique inode number. */ |
| 1986 | static DWORD |
| 1987 | generate_inode_val (const char * name) |
| 1988 | { |
| 1989 | char fullname[ MAX_PATH ]; |
| 1990 | char * p; |
| 1991 | unsigned hash; |
| 1992 | |
| 1993 | /* Get the truly canonical filename, if it exists. (Note: this |
| 1994 | doesn't resolve aliasing due to subst commands, or recognise hard |
| 1995 | links. */ |
| 1996 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) |
| 1997 | abort (); |
| 1998 | |
| 1999 | parse_root (fullname, &p); |
| 2000 | /* Normal W32 filesystems are still case insensitive. */ |
| 2001 | _strlwr (p); |
| 2002 | return hashval (p); |
| 2003 | } |
| 2004 | |
| 2005 | #endif |
| 2006 | |
| 2007 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
| 2008 | replace it with our own. This also allows us to calculate consistent |
| 2009 | inode values without hacks in the main Emacs code. */ |
| 2010 | int |
| 2011 | stat (const char * path, struct stat * buf) |
| 2012 | { |
| 2013 | char *name, *r; |
| 2014 | WIN32_FIND_DATA wfd; |
| 2015 | HANDLE fh; |
| 2016 | DWORD fake_inode; |
| 2017 | int permission; |
| 2018 | int len; |
| 2019 | int rootdir = FALSE; |
| 2020 | |
| 2021 | if (path == NULL || buf == NULL) |
| 2022 | { |
| 2023 | errno = EFAULT; |
| 2024 | return -1; |
| 2025 | } |
| 2026 | |
| 2027 | name = (char *) map_w32_filename (path, &path); |
| 2028 | /* must be valid filename, no wild cards or other invalid characters */ |
| 2029 | if (strpbrk (name, "*?|<>\"")) |
| 2030 | { |
| 2031 | errno = ENOENT; |
| 2032 | return -1; |
| 2033 | } |
| 2034 | |
| 2035 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
| 2036 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; |
| 2037 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') |
| 2038 | { |
| 2039 | r[1] = r[2] = '\0'; |
| 2040 | } |
| 2041 | |
| 2042 | /* Remove trailing directory separator, unless name is the root |
| 2043 | directory of a drive or UNC volume in which case ensure there |
| 2044 | is a trailing separator. */ |
| 2045 | len = strlen (name); |
| 2046 | rootdir = (path >= name + len - 1 |
| 2047 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); |
| 2048 | name = strcpy (alloca (len + 2), name); |
| 2049 | |
| 2050 | if (is_unc_volume (name)) |
| 2051 | { |
| 2052 | DWORD attrs = unc_volume_file_attributes (name); |
| 2053 | |
| 2054 | if (attrs == -1) |
| 2055 | return -1; |
| 2056 | |
| 2057 | memset (&wfd, 0, sizeof (wfd)); |
| 2058 | wfd.dwFileAttributes = attrs; |
| 2059 | wfd.ftCreationTime = utc_base_ft; |
| 2060 | wfd.ftLastAccessTime = utc_base_ft; |
| 2061 | wfd.ftLastWriteTime = utc_base_ft; |
| 2062 | strcpy (wfd.cFileName, name); |
| 2063 | } |
| 2064 | else if (rootdir) |
| 2065 | { |
| 2066 | if (!IS_DIRECTORY_SEP (name[len-1])) |
| 2067 | strcat (name, "\\"); |
| 2068 | if (GetDriveType (name) < 2) |
| 2069 | { |
| 2070 | errno = ENOENT; |
| 2071 | return -1; |
| 2072 | } |
| 2073 | memset (&wfd, 0, sizeof (wfd)); |
| 2074 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; |
| 2075 | wfd.ftCreationTime = utc_base_ft; |
| 2076 | wfd.ftLastAccessTime = utc_base_ft; |
| 2077 | wfd.ftLastWriteTime = utc_base_ft; |
| 2078 | strcpy (wfd.cFileName, name); |
| 2079 | } |
| 2080 | else |
| 2081 | { |
| 2082 | if (IS_DIRECTORY_SEP (name[len-1])) |
| 2083 | name[len - 1] = 0; |
| 2084 | |
| 2085 | /* (This is hacky, but helps when doing file completions on |
| 2086 | network drives.) Optimize by using information available from |
| 2087 | active readdir if possible. */ |
| 2088 | len = strlen (dir_pathname); |
| 2089 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) |
| 2090 | len--; |
| 2091 | if (dir_find_handle != INVALID_HANDLE_VALUE |
| 2092 | && strnicmp (name, dir_pathname, len) == 0 |
| 2093 | && IS_DIRECTORY_SEP (name[len]) |
| 2094 | && stricmp (name + len + 1, dir_static.d_name) == 0) |
| 2095 | { |
| 2096 | /* This was the last entry returned by readdir. */ |
| 2097 | wfd = dir_find_data; |
| 2098 | } |
| 2099 | else |
| 2100 | { |
| 2101 | fh = FindFirstFile (name, &wfd); |
| 2102 | if (fh == INVALID_HANDLE_VALUE) |
| 2103 | { |
| 2104 | errno = ENOENT; |
| 2105 | return -1; |
| 2106 | } |
| 2107 | FindClose (fh); |
| 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2112 | { |
| 2113 | buf->st_mode = _S_IFDIR; |
| 2114 | buf->st_nlink = 2; /* doesn't really matter */ |
| 2115 | fake_inode = 0; /* this doesn't either I think */ |
| 2116 | } |
| 2117 | else if (!NILP (Vw32_get_true_file_attributes) |
| 2118 | /* No access rights required to get info. */ |
| 2119 | && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL)) |
| 2120 | != INVALID_HANDLE_VALUE) |
| 2121 | { |
| 2122 | /* This is more accurate in terms of gettting the correct number |
| 2123 | of links, but is quite slow (it is noticable when Emacs is |
| 2124 | making a list of file name completions). */ |
| 2125 | BY_HANDLE_FILE_INFORMATION info; |
| 2126 | |
| 2127 | if (GetFileInformationByHandle (fh, &info)) |
| 2128 | { |
| 2129 | buf->st_nlink = info.nNumberOfLinks; |
| 2130 | /* Might as well use file index to fake inode values, but this |
| 2131 | is not guaranteed to be unique unless we keep a handle open |
| 2132 | all the time (even then there are situations where it is |
| 2133 | not unique). Reputedly, there are at most 48 bits of info |
| 2134 | (on NTFS, presumably less on FAT). */ |
| 2135 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; |
| 2136 | } |
| 2137 | else |
| 2138 | { |
| 2139 | buf->st_nlink = 1; |
| 2140 | fake_inode = 0; |
| 2141 | } |
| 2142 | |
| 2143 | switch (GetFileType (fh)) |
| 2144 | { |
| 2145 | case FILE_TYPE_DISK: |
| 2146 | buf->st_mode = _S_IFREG; |
| 2147 | break; |
| 2148 | case FILE_TYPE_PIPE: |
| 2149 | buf->st_mode = _S_IFIFO; |
| 2150 | break; |
| 2151 | case FILE_TYPE_CHAR: |
| 2152 | case FILE_TYPE_UNKNOWN: |
| 2153 | default: |
| 2154 | buf->st_mode = _S_IFCHR; |
| 2155 | } |
| 2156 | CloseHandle (fh); |
| 2157 | } |
| 2158 | else |
| 2159 | { |
| 2160 | /* Don't bother to make this information more accurate. */ |
| 2161 | buf->st_mode = _S_IFREG; |
| 2162 | buf->st_nlink = 1; |
| 2163 | fake_inode = 0; |
| 2164 | } |
| 2165 | |
| 2166 | #if 0 |
| 2167 | /* Not sure if there is any point in this. */ |
| 2168 | if (!NILP (Vw32_generate_fake_inodes)) |
| 2169 | fake_inode = generate_inode_val (name); |
| 2170 | else if (fake_inode == 0) |
| 2171 | { |
| 2172 | /* For want of something better, try to make everything unique. */ |
| 2173 | static DWORD gen_num = 0; |
| 2174 | fake_inode = ++gen_num; |
| 2175 | } |
| 2176 | #endif |
| 2177 | |
| 2178 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 2179 | if (sizeof (buf->st_ino) == 2) |
| 2180 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 2181 | else |
| 2182 | buf->st_ino = fake_inode; |
| 2183 | |
| 2184 | /* consider files to belong to current user */ |
| 2185 | buf->st_uid = the_passwd.pw_uid; |
| 2186 | buf->st_gid = the_passwd.pw_gid; |
| 2187 | |
| 2188 | /* volume_info is set indirectly by map_w32_filename */ |
| 2189 | buf->st_dev = volume_info.serialnum; |
| 2190 | buf->st_rdev = volume_info.serialnum; |
| 2191 | |
| 2192 | |
| 2193 | buf->st_size = wfd.nFileSizeLow; |
| 2194 | |
| 2195 | /* Convert timestamps to Unix format. */ |
| 2196 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); |
| 2197 | buf->st_atime = convert_time (wfd.ftLastAccessTime); |
| 2198 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 2199 | buf->st_ctime = convert_time (wfd.ftCreationTime); |
| 2200 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 2201 | |
| 2202 | /* determine rwx permissions */ |
| 2203 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 2204 | permission = _S_IREAD; |
| 2205 | else |
| 2206 | permission = _S_IREAD | _S_IWRITE; |
| 2207 | |
| 2208 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2209 | permission |= _S_IEXEC; |
| 2210 | else if (is_exec (name)) |
| 2211 | permission |= _S_IEXEC; |
| 2212 | |
| 2213 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 2214 | |
| 2215 | return 0; |
| 2216 | } |
| 2217 | |
| 2218 | /* Provide fstat and utime as well as stat for consistent handling of |
| 2219 | file timestamps. */ |
| 2220 | int |
| 2221 | fstat (int desc, struct stat * buf) |
| 2222 | { |
| 2223 | HANDLE fh = (HANDLE) _get_osfhandle (desc); |
| 2224 | BY_HANDLE_FILE_INFORMATION info; |
| 2225 | DWORD fake_inode; |
| 2226 | int permission; |
| 2227 | |
| 2228 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) |
| 2229 | { |
| 2230 | case FILE_TYPE_DISK: |
| 2231 | buf->st_mode = _S_IFREG; |
| 2232 | if (!GetFileInformationByHandle (fh, &info)) |
| 2233 | { |
| 2234 | errno = EACCES; |
| 2235 | return -1; |
| 2236 | } |
| 2237 | break; |
| 2238 | case FILE_TYPE_PIPE: |
| 2239 | buf->st_mode = _S_IFIFO; |
| 2240 | goto non_disk; |
| 2241 | case FILE_TYPE_CHAR: |
| 2242 | case FILE_TYPE_UNKNOWN: |
| 2243 | default: |
| 2244 | buf->st_mode = _S_IFCHR; |
| 2245 | non_disk: |
| 2246 | memset (&info, 0, sizeof (info)); |
| 2247 | info.dwFileAttributes = 0; |
| 2248 | info.ftCreationTime = utc_base_ft; |
| 2249 | info.ftLastAccessTime = utc_base_ft; |
| 2250 | info.ftLastWriteTime = utc_base_ft; |
| 2251 | } |
| 2252 | |
| 2253 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2254 | { |
| 2255 | buf->st_mode = _S_IFDIR; |
| 2256 | buf->st_nlink = 2; /* doesn't really matter */ |
| 2257 | fake_inode = 0; /* this doesn't either I think */ |
| 2258 | } |
| 2259 | else |
| 2260 | { |
| 2261 | buf->st_nlink = info.nNumberOfLinks; |
| 2262 | /* Might as well use file index to fake inode values, but this |
| 2263 | is not guaranteed to be unique unless we keep a handle open |
| 2264 | all the time (even then there are situations where it is |
| 2265 | not unique). Reputedly, there are at most 48 bits of info |
| 2266 | (on NTFS, presumably less on FAT). */ |
| 2267 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; |
| 2268 | } |
| 2269 | |
| 2270 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 2271 | if (sizeof (buf->st_ino) == 2) |
| 2272 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 2273 | else |
| 2274 | buf->st_ino = fake_inode; |
| 2275 | |
| 2276 | /* consider files to belong to current user */ |
| 2277 | buf->st_uid = 0; |
| 2278 | buf->st_gid = 0; |
| 2279 | |
| 2280 | buf->st_dev = info.dwVolumeSerialNumber; |
| 2281 | buf->st_rdev = info.dwVolumeSerialNumber; |
| 2282 | |
| 2283 | buf->st_size = info.nFileSizeLow; |
| 2284 | |
| 2285 | /* Convert timestamps to Unix format. */ |
| 2286 | buf->st_mtime = convert_time (info.ftLastWriteTime); |
| 2287 | buf->st_atime = convert_time (info.ftLastAccessTime); |
| 2288 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 2289 | buf->st_ctime = convert_time (info.ftCreationTime); |
| 2290 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 2291 | |
| 2292 | /* determine rwx permissions */ |
| 2293 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 2294 | permission = _S_IREAD; |
| 2295 | else |
| 2296 | permission = _S_IREAD | _S_IWRITE; |
| 2297 | |
| 2298 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2299 | permission |= _S_IEXEC; |
| 2300 | else |
| 2301 | { |
| 2302 | #if 0 /* no way of knowing the filename */ |
| 2303 | char * p = strrchr (name, '.'); |
| 2304 | if (p != NULL && |
| 2305 | (stricmp (p, ".exe") == 0 || |
| 2306 | stricmp (p, ".com") == 0 || |
| 2307 | stricmp (p, ".bat") == 0 || |
| 2308 | stricmp (p, ".cmd") == 0)) |
| 2309 | permission |= _S_IEXEC; |
| 2310 | #endif |
| 2311 | } |
| 2312 | |
| 2313 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 2314 | |
| 2315 | return 0; |
| 2316 | } |
| 2317 | |
| 2318 | int |
| 2319 | utime (const char *name, struct utimbuf *times) |
| 2320 | { |
| 2321 | struct utimbuf deftime; |
| 2322 | HANDLE fh; |
| 2323 | FILETIME mtime; |
| 2324 | FILETIME atime; |
| 2325 | |
| 2326 | if (times == NULL) |
| 2327 | { |
| 2328 | deftime.modtime = deftime.actime = time (NULL); |
| 2329 | times = &deftime; |
| 2330 | } |
| 2331 | |
| 2332 | /* Need write access to set times. */ |
| 2333 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 2334 | 0, OPEN_EXISTING, 0, NULL); |
| 2335 | if (fh) |
| 2336 | { |
| 2337 | convert_from_time_t (times->actime, &atime); |
| 2338 | convert_from_time_t (times->modtime, &mtime); |
| 2339 | if (!SetFileTime (fh, NULL, &atime, &mtime)) |
| 2340 | { |
| 2341 | CloseHandle (fh); |
| 2342 | errno = EACCES; |
| 2343 | return -1; |
| 2344 | } |
| 2345 | CloseHandle (fh); |
| 2346 | } |
| 2347 | else |
| 2348 | { |
| 2349 | errno = EINVAL; |
| 2350 | return -1; |
| 2351 | } |
| 2352 | return 0; |
| 2353 | } |
| 2354 | |
| 2355 | #ifdef HAVE_SOCKETS |
| 2356 | |
| 2357 | /* Wrappers for winsock functions to map between our file descriptors |
| 2358 | and winsock's handles; also set h_errno for convenience. |
| 2359 | |
| 2360 | To allow Emacs to run on systems which don't have winsock support |
| 2361 | installed, we dynamically link to winsock on startup if present, and |
| 2362 | otherwise provide the minimum necessary functionality |
| 2363 | (eg. gethostname). */ |
| 2364 | |
| 2365 | /* function pointers for relevant socket functions */ |
| 2366 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); |
| 2367 | void (PASCAL *pfn_WSASetLastError) (int iError); |
| 2368 | int (PASCAL *pfn_WSAGetLastError) (void); |
| 2369 | int (PASCAL *pfn_socket) (int af, int type, int protocol); |
| 2370 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 2371 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 2372 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); |
| 2373 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); |
| 2374 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); |
| 2375 | int (PASCAL *pfn_closesocket) (SOCKET s); |
| 2376 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); |
| 2377 | int (PASCAL *pfn_WSACleanup) (void); |
| 2378 | |
| 2379 | u_short (PASCAL *pfn_htons) (u_short hostshort); |
| 2380 | u_short (PASCAL *pfn_ntohs) (u_short netshort); |
| 2381 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); |
| 2382 | int (PASCAL *pfn_gethostname) (char * name, int namelen); |
| 2383 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); |
| 2384 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); |
| 2385 | |
| 2386 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
| 2387 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); |
| 2388 | #ifndef HANDLE_FLAG_INHERIT |
| 2389 | #define HANDLE_FLAG_INHERIT 1 |
| 2390 | #endif |
| 2391 | |
| 2392 | HANDLE winsock_lib; |
| 2393 | static int winsock_inuse; |
| 2394 | |
| 2395 | BOOL |
| 2396 | term_winsock (void) |
| 2397 | { |
| 2398 | if (winsock_lib != NULL && winsock_inuse == 0) |
| 2399 | { |
| 2400 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
| 2401 | after WSAStartup returns successfully, but it seems reasonable |
| 2402 | to allow unloading winsock anyway in that case. */ |
| 2403 | if (pfn_WSACleanup () == 0 || |
| 2404 | pfn_WSAGetLastError () == WSAENETDOWN) |
| 2405 | { |
| 2406 | if (FreeLibrary (winsock_lib)) |
| 2407 | winsock_lib = NULL; |
| 2408 | return TRUE; |
| 2409 | } |
| 2410 | } |
| 2411 | return FALSE; |
| 2412 | } |
| 2413 | |
| 2414 | BOOL |
| 2415 | init_winsock (int load_now) |
| 2416 | { |
| 2417 | WSADATA winsockData; |
| 2418 | |
| 2419 | if (winsock_lib != NULL) |
| 2420 | return TRUE; |
| 2421 | |
| 2422 | pfn_SetHandleInformation = NULL; |
| 2423 | pfn_SetHandleInformation |
| 2424 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 2425 | "SetHandleInformation"); |
| 2426 | |
| 2427 | winsock_lib = LoadLibrary ("wsock32.dll"); |
| 2428 | |
| 2429 | if (winsock_lib != NULL) |
| 2430 | { |
| 2431 | /* dynamically link to socket functions */ |
| 2432 | |
| 2433 | #define LOAD_PROC(fn) \ |
| 2434 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ |
| 2435 | goto fail; |
| 2436 | |
| 2437 | LOAD_PROC( WSAStartup ); |
| 2438 | LOAD_PROC( WSASetLastError ); |
| 2439 | LOAD_PROC( WSAGetLastError ); |
| 2440 | LOAD_PROC( socket ); |
| 2441 | LOAD_PROC( bind ); |
| 2442 | LOAD_PROC( connect ); |
| 2443 | LOAD_PROC( ioctlsocket ); |
| 2444 | LOAD_PROC( recv ); |
| 2445 | LOAD_PROC( send ); |
| 2446 | LOAD_PROC( closesocket ); |
| 2447 | LOAD_PROC( shutdown ); |
| 2448 | LOAD_PROC( htons ); |
| 2449 | LOAD_PROC( ntohs ); |
| 2450 | LOAD_PROC( inet_addr ); |
| 2451 | LOAD_PROC( gethostname ); |
| 2452 | LOAD_PROC( gethostbyname ); |
| 2453 | LOAD_PROC( getservbyname ); |
| 2454 | LOAD_PROC( WSACleanup ); |
| 2455 | |
| 2456 | #undef LOAD_PROC |
| 2457 | |
| 2458 | /* specify version 1.1 of winsock */ |
| 2459 | if (pfn_WSAStartup (0x101, &winsockData) == 0) |
| 2460 | { |
| 2461 | if (winsockData.wVersion != 0x101) |
| 2462 | goto fail; |
| 2463 | |
| 2464 | if (!load_now) |
| 2465 | { |
| 2466 | /* Report that winsock exists and is usable, but leave |
| 2467 | socket functions disabled. I am assuming that calling |
| 2468 | WSAStartup does not require any network interaction, |
| 2469 | and in particular does not cause or require a dial-up |
| 2470 | connection to be established. */ |
| 2471 | |
| 2472 | pfn_WSACleanup (); |
| 2473 | FreeLibrary (winsock_lib); |
| 2474 | winsock_lib = NULL; |
| 2475 | } |
| 2476 | winsock_inuse = 0; |
| 2477 | return TRUE; |
| 2478 | } |
| 2479 | |
| 2480 | fail: |
| 2481 | FreeLibrary (winsock_lib); |
| 2482 | winsock_lib = NULL; |
| 2483 | } |
| 2484 | |
| 2485 | return FALSE; |
| 2486 | } |
| 2487 | |
| 2488 | |
| 2489 | int h_errno = 0; |
| 2490 | |
| 2491 | /* function to set h_errno for compatability; map winsock error codes to |
| 2492 | normal system codes where they overlap (non-overlapping definitions |
| 2493 | are already in <sys/socket.h> */ |
| 2494 | static void set_errno () |
| 2495 | { |
| 2496 | if (winsock_lib == NULL) |
| 2497 | h_errno = EINVAL; |
| 2498 | else |
| 2499 | h_errno = pfn_WSAGetLastError (); |
| 2500 | |
| 2501 | switch (h_errno) |
| 2502 | { |
| 2503 | case WSAEACCES: h_errno = EACCES; break; |
| 2504 | case WSAEBADF: h_errno = EBADF; break; |
| 2505 | case WSAEFAULT: h_errno = EFAULT; break; |
| 2506 | case WSAEINTR: h_errno = EINTR; break; |
| 2507 | case WSAEINVAL: h_errno = EINVAL; break; |
| 2508 | case WSAEMFILE: h_errno = EMFILE; break; |
| 2509 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; |
| 2510 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; |
| 2511 | } |
| 2512 | errno = h_errno; |
| 2513 | } |
| 2514 | |
| 2515 | static void check_errno () |
| 2516 | { |
| 2517 | if (h_errno == 0 && winsock_lib != NULL) |
| 2518 | pfn_WSASetLastError (0); |
| 2519 | } |
| 2520 | |
| 2521 | /* Extend strerror to handle the winsock-specific error codes. */ |
| 2522 | struct { |
| 2523 | int errnum; |
| 2524 | char * msg; |
| 2525 | } _wsa_errlist[] = { |
| 2526 | WSAEINTR , "Interrupted function call", |
| 2527 | WSAEBADF , "Bad file descriptor", |
| 2528 | WSAEACCES , "Permission denied", |
| 2529 | WSAEFAULT , "Bad address", |
| 2530 | WSAEINVAL , "Invalid argument", |
| 2531 | WSAEMFILE , "Too many open files", |
| 2532 | |
| 2533 | WSAEWOULDBLOCK , "Resource temporarily unavailable", |
| 2534 | WSAEINPROGRESS , "Operation now in progress", |
| 2535 | WSAEALREADY , "Operation already in progress", |
| 2536 | WSAENOTSOCK , "Socket operation on non-socket", |
| 2537 | WSAEDESTADDRREQ , "Destination address required", |
| 2538 | WSAEMSGSIZE , "Message too long", |
| 2539 | WSAEPROTOTYPE , "Protocol wrong type for socket", |
| 2540 | WSAENOPROTOOPT , "Bad protocol option", |
| 2541 | WSAEPROTONOSUPPORT , "Protocol not supported", |
| 2542 | WSAESOCKTNOSUPPORT , "Socket type not supported", |
| 2543 | WSAEOPNOTSUPP , "Operation not supported", |
| 2544 | WSAEPFNOSUPPORT , "Protocol family not supported", |
| 2545 | WSAEAFNOSUPPORT , "Address family not supported by protocol family", |
| 2546 | WSAEADDRINUSE , "Address already in use", |
| 2547 | WSAEADDRNOTAVAIL , "Cannot assign requested address", |
| 2548 | WSAENETDOWN , "Network is down", |
| 2549 | WSAENETUNREACH , "Network is unreachable", |
| 2550 | WSAENETRESET , "Network dropped connection on reset", |
| 2551 | WSAECONNABORTED , "Software caused connection abort", |
| 2552 | WSAECONNRESET , "Connection reset by peer", |
| 2553 | WSAENOBUFS , "No buffer space available", |
| 2554 | WSAEISCONN , "Socket is already connected", |
| 2555 | WSAENOTCONN , "Socket is not connected", |
| 2556 | WSAESHUTDOWN , "Cannot send after socket shutdown", |
| 2557 | WSAETOOMANYREFS , "Too many references", /* not sure */ |
| 2558 | WSAETIMEDOUT , "Connection timed out", |
| 2559 | WSAECONNREFUSED , "Connection refused", |
| 2560 | WSAELOOP , "Network loop", /* not sure */ |
| 2561 | WSAENAMETOOLONG , "Name is too long", |
| 2562 | WSAEHOSTDOWN , "Host is down", |
| 2563 | WSAEHOSTUNREACH , "No route to host", |
| 2564 | WSAENOTEMPTY , "Buffer not empty", /* not sure */ |
| 2565 | WSAEPROCLIM , "Too many processes", |
| 2566 | WSAEUSERS , "Too many users", /* not sure */ |
| 2567 | WSAEDQUOT , "Double quote in host name", /* really not sure */ |
| 2568 | WSAESTALE , "Data is stale", /* not sure */ |
| 2569 | WSAEREMOTE , "Remote error", /* not sure */ |
| 2570 | |
| 2571 | WSASYSNOTREADY , "Network subsystem is unavailable", |
| 2572 | WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range", |
| 2573 | WSANOTINITIALISED , "Winsock not initialized successfully", |
| 2574 | WSAEDISCON , "Graceful shutdown in progress", |
| 2575 | #ifdef WSAENOMORE |
| 2576 | WSAENOMORE , "No more operations allowed", /* not sure */ |
| 2577 | WSAECANCELLED , "Operation cancelled", /* not sure */ |
| 2578 | WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider", |
| 2579 | WSAEINVALIDPROVIDER , "Invalid service provider version number", |
| 2580 | WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider", |
| 2581 | WSASYSCALLFAILURE , "System call failured", |
| 2582 | WSASERVICE_NOT_FOUND , "Service not found", /* not sure */ |
| 2583 | WSATYPE_NOT_FOUND , "Class type not found", |
| 2584 | WSA_E_NO_MORE , "No more resources available", /* really not sure */ |
| 2585 | WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */ |
| 2586 | WSAEREFUSED , "Operation refused", /* not sure */ |
| 2587 | #endif |
| 2588 | |
| 2589 | WSAHOST_NOT_FOUND , "Host not found", |
| 2590 | WSATRY_AGAIN , "Authoritative host not found during name lookup", |
| 2591 | WSANO_RECOVERY , "Non-recoverable error during name lookup", |
| 2592 | WSANO_DATA , "Valid name, no data record of requested type", |
| 2593 | |
| 2594 | -1, NULL |
| 2595 | }; |
| 2596 | |
| 2597 | char * |
| 2598 | sys_strerror(int error_no) |
| 2599 | { |
| 2600 | int i; |
| 2601 | static char unknown_msg[40]; |
| 2602 | |
| 2603 | if (error_no >= 0 && error_no < sys_nerr) |
| 2604 | return sys_errlist[error_no]; |
| 2605 | |
| 2606 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) |
| 2607 | if (_wsa_errlist[i].errnum == error_no) |
| 2608 | return _wsa_errlist[i].msg; |
| 2609 | |
| 2610 | sprintf(unknown_msg, "Unidentified error: %d", error_no); |
| 2611 | return unknown_msg; |
| 2612 | } |
| 2613 | |
| 2614 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
| 2615 | but I believe the method of keeping the socket handle separate (and |
| 2616 | insuring it is not inheritable) is the correct one. */ |
| 2617 | |
| 2618 | //#define SOCK_REPLACE_HANDLE |
| 2619 | |
| 2620 | #ifdef SOCK_REPLACE_HANDLE |
| 2621 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) |
| 2622 | #else |
| 2623 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) |
| 2624 | #endif |
| 2625 | |
| 2626 | int |
| 2627 | sys_socket(int af, int type, int protocol) |
| 2628 | { |
| 2629 | int fd; |
| 2630 | long s; |
| 2631 | child_process * cp; |
| 2632 | |
| 2633 | if (winsock_lib == NULL) |
| 2634 | { |
| 2635 | h_errno = ENETDOWN; |
| 2636 | return INVALID_SOCKET; |
| 2637 | } |
| 2638 | |
| 2639 | check_errno (); |
| 2640 | |
| 2641 | /* call the real socket function */ |
| 2642 | s = (long) pfn_socket (af, type, protocol); |
| 2643 | |
| 2644 | if (s != INVALID_SOCKET) |
| 2645 | { |
| 2646 | /* Although under NT 3.5 _open_osfhandle will accept a socket |
| 2647 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, |
| 2648 | that does not work under NT 3.1. However, we can get the same |
| 2649 | effect by using a backdoor function to replace an existing |
| 2650 | descriptor handle with the one we want. */ |
| 2651 | |
| 2652 | /* allocate a file descriptor (with appropriate flags) */ |
| 2653 | fd = _open ("NUL:", _O_RDWR); |
| 2654 | if (fd >= 0) |
| 2655 | { |
| 2656 | #ifdef SOCK_REPLACE_HANDLE |
| 2657 | /* now replace handle to NUL with our socket handle */ |
| 2658 | CloseHandle ((HANDLE) _get_osfhandle (fd)); |
| 2659 | _free_osfhnd (fd); |
| 2660 | _set_osfhnd (fd, s); |
| 2661 | /* setmode (fd, _O_BINARY); */ |
| 2662 | #else |
| 2663 | /* Make a non-inheritable copy of the socket handle. Note |
| 2664 | that it is possible that sockets aren't actually kernel |
| 2665 | handles, which appears to be the case on Windows 9x when |
| 2666 | the MS Proxy winsock client is installed. */ |
| 2667 | { |
| 2668 | /* Apparently there is a bug in NT 3.51 with some service |
| 2669 | packs, which prevents using DuplicateHandle to make a |
| 2670 | socket handle non-inheritable (causes WSACleanup to |
| 2671 | hang). The work-around is to use SetHandleInformation |
| 2672 | instead if it is available and implemented. */ |
| 2673 | if (pfn_SetHandleInformation) |
| 2674 | { |
| 2675 | pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0); |
| 2676 | } |
| 2677 | else |
| 2678 | { |
| 2679 | HANDLE parent = GetCurrentProcess (); |
| 2680 | HANDLE new_s = INVALID_HANDLE_VALUE; |
| 2681 | |
| 2682 | if (DuplicateHandle (parent, |
| 2683 | (HANDLE) s, |
| 2684 | parent, |
| 2685 | &new_s, |
| 2686 | 0, |
| 2687 | FALSE, |
| 2688 | DUPLICATE_SAME_ACCESS)) |
| 2689 | { |
| 2690 | /* It is possible that DuplicateHandle succeeds even |
| 2691 | though the socket wasn't really a kernel handle, |
| 2692 | because a real handle has the same value. So |
| 2693 | test whether the new handle really is a socket. */ |
| 2694 | long nonblocking = 0; |
| 2695 | if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0) |
| 2696 | { |
| 2697 | pfn_closesocket (s); |
| 2698 | s = (SOCKET) new_s; |
| 2699 | } |
| 2700 | else |
| 2701 | { |
| 2702 | CloseHandle (new_s); |
| 2703 | } |
| 2704 | } |
| 2705 | } |
| 2706 | } |
| 2707 | fd_info[fd].hnd = (HANDLE) s; |
| 2708 | #endif |
| 2709 | |
| 2710 | /* set our own internal flags */ |
| 2711 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; |
| 2712 | |
| 2713 | cp = new_child (); |
| 2714 | if (cp) |
| 2715 | { |
| 2716 | cp->fd = fd; |
| 2717 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 2718 | |
| 2719 | /* attach child_process to fd_info */ |
| 2720 | if (fd_info[ fd ].cp != NULL) |
| 2721 | { |
| 2722 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); |
| 2723 | abort (); |
| 2724 | } |
| 2725 | |
| 2726 | fd_info[ fd ].cp = cp; |
| 2727 | |
| 2728 | /* success! */ |
| 2729 | winsock_inuse++; /* count open sockets */ |
| 2730 | return fd; |
| 2731 | } |
| 2732 | |
| 2733 | /* clean up */ |
| 2734 | _close (fd); |
| 2735 | } |
| 2736 | pfn_closesocket (s); |
| 2737 | h_errno = EMFILE; |
| 2738 | } |
| 2739 | set_errno (); |
| 2740 | |
| 2741 | return -1; |
| 2742 | } |
| 2743 | |
| 2744 | |
| 2745 | int |
| 2746 | sys_bind (int s, const struct sockaddr * addr, int namelen) |
| 2747 | { |
| 2748 | if (winsock_lib == NULL) |
| 2749 | { |
| 2750 | h_errno = ENOTSOCK; |
| 2751 | return SOCKET_ERROR; |
| 2752 | } |
| 2753 | |
| 2754 | check_errno (); |
| 2755 | if (fd_info[s].flags & FILE_SOCKET) |
| 2756 | { |
| 2757 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); |
| 2758 | if (rc == SOCKET_ERROR) |
| 2759 | set_errno (); |
| 2760 | return rc; |
| 2761 | } |
| 2762 | h_errno = ENOTSOCK; |
| 2763 | return SOCKET_ERROR; |
| 2764 | } |
| 2765 | |
| 2766 | |
| 2767 | int |
| 2768 | sys_connect (int s, const struct sockaddr * name, int namelen) |
| 2769 | { |
| 2770 | if (winsock_lib == NULL) |
| 2771 | { |
| 2772 | h_errno = ENOTSOCK; |
| 2773 | return SOCKET_ERROR; |
| 2774 | } |
| 2775 | |
| 2776 | check_errno (); |
| 2777 | if (fd_info[s].flags & FILE_SOCKET) |
| 2778 | { |
| 2779 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); |
| 2780 | if (rc == SOCKET_ERROR) |
| 2781 | set_errno (); |
| 2782 | return rc; |
| 2783 | } |
| 2784 | h_errno = ENOTSOCK; |
| 2785 | return SOCKET_ERROR; |
| 2786 | } |
| 2787 | |
| 2788 | u_short |
| 2789 | sys_htons (u_short hostshort) |
| 2790 | { |
| 2791 | return (winsock_lib != NULL) ? |
| 2792 | pfn_htons (hostshort) : hostshort; |
| 2793 | } |
| 2794 | |
| 2795 | u_short |
| 2796 | sys_ntohs (u_short netshort) |
| 2797 | { |
| 2798 | return (winsock_lib != NULL) ? |
| 2799 | pfn_ntohs (netshort) : netshort; |
| 2800 | } |
| 2801 | |
| 2802 | unsigned long |
| 2803 | sys_inet_addr (const char * cp) |
| 2804 | { |
| 2805 | return (winsock_lib != NULL) ? |
| 2806 | pfn_inet_addr (cp) : INADDR_NONE; |
| 2807 | } |
| 2808 | |
| 2809 | int |
| 2810 | sys_gethostname (char * name, int namelen) |
| 2811 | { |
| 2812 | if (winsock_lib != NULL) |
| 2813 | return pfn_gethostname (name, namelen); |
| 2814 | |
| 2815 | if (namelen > MAX_COMPUTERNAME_LENGTH) |
| 2816 | return !GetComputerName (name, (DWORD *)&namelen); |
| 2817 | |
| 2818 | h_errno = EFAULT; |
| 2819 | return SOCKET_ERROR; |
| 2820 | } |
| 2821 | |
| 2822 | struct hostent * |
| 2823 | sys_gethostbyname(const char * name) |
| 2824 | { |
| 2825 | struct hostent * host; |
| 2826 | |
| 2827 | if (winsock_lib == NULL) |
| 2828 | { |
| 2829 | h_errno = ENETDOWN; |
| 2830 | return NULL; |
| 2831 | } |
| 2832 | |
| 2833 | check_errno (); |
| 2834 | host = pfn_gethostbyname (name); |
| 2835 | if (!host) |
| 2836 | set_errno (); |
| 2837 | return host; |
| 2838 | } |
| 2839 | |
| 2840 | struct servent * |
| 2841 | sys_getservbyname(const char * name, const char * proto) |
| 2842 | { |
| 2843 | struct servent * serv; |
| 2844 | |
| 2845 | if (winsock_lib == NULL) |
| 2846 | { |
| 2847 | h_errno = ENETDOWN; |
| 2848 | return NULL; |
| 2849 | } |
| 2850 | |
| 2851 | check_errno (); |
| 2852 | serv = pfn_getservbyname (name, proto); |
| 2853 | if (!serv) |
| 2854 | set_errno (); |
| 2855 | return serv; |
| 2856 | } |
| 2857 | |
| 2858 | int |
| 2859 | sys_shutdown (int s, int how) |
| 2860 | { |
| 2861 | int rc; |
| 2862 | |
| 2863 | if (winsock_lib == NULL) |
| 2864 | { |
| 2865 | h_errno = ENETDOWN; |
| 2866 | return SOCKET_ERROR; |
| 2867 | } |
| 2868 | |
| 2869 | check_errno (); |
| 2870 | if (fd_info[s].flags & FILE_SOCKET) |
| 2871 | { |
| 2872 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); |
| 2873 | if (rc == SOCKET_ERROR) |
| 2874 | set_errno (); |
| 2875 | return rc; |
| 2876 | } |
| 2877 | h_errno = ENOTSOCK; |
| 2878 | return SOCKET_ERROR; |
| 2879 | } |
| 2880 | |
| 2881 | #endif /* HAVE_SOCKETS */ |
| 2882 | |
| 2883 | |
| 2884 | /* Shadow main io functions: we need to handle pipes and sockets more |
| 2885 | intelligently, and implement non-blocking mode as well. */ |
| 2886 | |
| 2887 | int |
| 2888 | sys_close (int fd) |
| 2889 | { |
| 2890 | int rc; |
| 2891 | |
| 2892 | if (fd < 0 || fd >= MAXDESC) |
| 2893 | { |
| 2894 | errno = EBADF; |
| 2895 | return -1; |
| 2896 | } |
| 2897 | |
| 2898 | if (fd_info[fd].cp) |
| 2899 | { |
| 2900 | child_process * cp = fd_info[fd].cp; |
| 2901 | |
| 2902 | fd_info[fd].cp = NULL; |
| 2903 | |
| 2904 | if (CHILD_ACTIVE (cp)) |
| 2905 | { |
| 2906 | /* if last descriptor to active child_process then cleanup */ |
| 2907 | int i; |
| 2908 | for (i = 0; i < MAXDESC; i++) |
| 2909 | { |
| 2910 | if (i == fd) |
| 2911 | continue; |
| 2912 | if (fd_info[i].cp == cp) |
| 2913 | break; |
| 2914 | } |
| 2915 | if (i == MAXDESC) |
| 2916 | { |
| 2917 | #ifdef HAVE_SOCKETS |
| 2918 | if (fd_info[fd].flags & FILE_SOCKET) |
| 2919 | { |
| 2920 | #ifndef SOCK_REPLACE_HANDLE |
| 2921 | if (winsock_lib == NULL) abort (); |
| 2922 | |
| 2923 | pfn_shutdown (SOCK_HANDLE (fd), 2); |
| 2924 | rc = pfn_closesocket (SOCK_HANDLE (fd)); |
| 2925 | #endif |
| 2926 | winsock_inuse--; /* count open sockets */ |
| 2927 | } |
| 2928 | #endif |
| 2929 | delete_child (cp); |
| 2930 | } |
| 2931 | } |
| 2932 | } |
| 2933 | |
| 2934 | /* Note that sockets do not need special treatment here (at least on |
| 2935 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
| 2936 | closesocket is equivalent to CloseHandle, which is to be expected |
| 2937 | because socket handles are fully fledged kernel handles. */ |
| 2938 | rc = _close (fd); |
| 2939 | |
| 2940 | if (rc == 0) |
| 2941 | fd_info[fd].flags = 0; |
| 2942 | |
| 2943 | return rc; |
| 2944 | } |
| 2945 | |
| 2946 | int |
| 2947 | sys_dup (int fd) |
| 2948 | { |
| 2949 | int new_fd; |
| 2950 | |
| 2951 | new_fd = _dup (fd); |
| 2952 | if (new_fd >= 0) |
| 2953 | { |
| 2954 | /* duplicate our internal info as well */ |
| 2955 | fd_info[new_fd] = fd_info[fd]; |
| 2956 | } |
| 2957 | return new_fd; |
| 2958 | } |
| 2959 | |
| 2960 | |
| 2961 | int |
| 2962 | sys_dup2 (int src, int dst) |
| 2963 | { |
| 2964 | int rc; |
| 2965 | |
| 2966 | if (dst < 0 || dst >= MAXDESC) |
| 2967 | { |
| 2968 | errno = EBADF; |
| 2969 | return -1; |
| 2970 | } |
| 2971 | |
| 2972 | /* make sure we close the destination first if it's a pipe or socket */ |
| 2973 | if (src != dst && fd_info[dst].flags != 0) |
| 2974 | sys_close (dst); |
| 2975 | |
| 2976 | rc = _dup2 (src, dst); |
| 2977 | if (rc == 0) |
| 2978 | { |
| 2979 | /* duplicate our internal info as well */ |
| 2980 | fd_info[dst] = fd_info[src]; |
| 2981 | } |
| 2982 | return rc; |
| 2983 | } |
| 2984 | |
| 2985 | /* Unix pipe() has only one arg */ |
| 2986 | int |
| 2987 | sys_pipe (int * phandles) |
| 2988 | { |
| 2989 | int rc; |
| 2990 | unsigned flags; |
| 2991 | child_process * cp; |
| 2992 | |
| 2993 | /* make pipe handles non-inheritable; when we spawn a child, we |
| 2994 | replace the relevant handle with an inheritable one. Also put |
| 2995 | pipes into binary mode; we will do text mode translation ourselves |
| 2996 | if required. */ |
| 2997 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); |
| 2998 | |
| 2999 | if (rc == 0) |
| 3000 | { |
| 3001 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
| 3002 | fd_info[phandles[0]].flags = flags; |
| 3003 | |
| 3004 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
| 3005 | fd_info[phandles[1]].flags = flags; |
| 3006 | } |
| 3007 | |
| 3008 | return rc; |
| 3009 | } |
| 3010 | |
| 3011 | /* From ntproc.c */ |
| 3012 | extern Lisp_Object Vw32_pipe_read_delay; |
| 3013 | |
| 3014 | /* Function to do blocking read of one byte, needed to implement |
| 3015 | select. It is only allowed on sockets and pipes. */ |
| 3016 | int |
| 3017 | _sys_read_ahead (int fd) |
| 3018 | { |
| 3019 | child_process * cp; |
| 3020 | int rc; |
| 3021 | |
| 3022 | if (fd < 0 || fd >= MAXDESC) |
| 3023 | return STATUS_READ_ERROR; |
| 3024 | |
| 3025 | cp = fd_info[fd].cp; |
| 3026 | |
| 3027 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 3028 | return STATUS_READ_ERROR; |
| 3029 | |
| 3030 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 |
| 3031 | || (fd_info[fd].flags & FILE_READ) == 0) |
| 3032 | { |
| 3033 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); |
| 3034 | abort (); |
| 3035 | } |
| 3036 | |
| 3037 | cp->status = STATUS_READ_IN_PROGRESS; |
| 3038 | |
| 3039 | if (fd_info[fd].flags & FILE_PIPE) |
| 3040 | { |
| 3041 | rc = _read (fd, &cp->chr, sizeof (char)); |
| 3042 | |
| 3043 | /* Give subprocess time to buffer some more output for us before |
| 3044 | reporting that input is available; we need this because Windows 95 |
| 3045 | connects DOS programs to pipes by making the pipe appear to be |
| 3046 | the normal console stdout - as a result most DOS programs will |
| 3047 | write to stdout without buffering, ie. one character at a |
| 3048 | time. Even some W32 programs do this - "dir" in a command |
| 3049 | shell on NT is very slow if we don't do this. */ |
| 3050 | if (rc > 0) |
| 3051 | { |
| 3052 | int wait = XINT (Vw32_pipe_read_delay); |
| 3053 | |
| 3054 | if (wait > 0) |
| 3055 | Sleep (wait); |
| 3056 | else if (wait < 0) |
| 3057 | while (++wait <= 0) |
| 3058 | /* Yield remainder of our time slice, effectively giving a |
| 3059 | temporary priority boost to the child process. */ |
| 3060 | Sleep (0); |
| 3061 | } |
| 3062 | } |
| 3063 | #ifdef HAVE_SOCKETS |
| 3064 | else if (fd_info[fd].flags & FILE_SOCKET) |
| 3065 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); |
| 3066 | #endif |
| 3067 | |
| 3068 | if (rc == sizeof (char)) |
| 3069 | cp->status = STATUS_READ_SUCCEEDED; |
| 3070 | else |
| 3071 | cp->status = STATUS_READ_FAILED; |
| 3072 | |
| 3073 | return cp->status; |
| 3074 | } |
| 3075 | |
| 3076 | int |
| 3077 | sys_read (int fd, char * buffer, unsigned int count) |
| 3078 | { |
| 3079 | int nchars; |
| 3080 | int to_read; |
| 3081 | DWORD waiting; |
| 3082 | char * orig_buffer = buffer; |
| 3083 | |
| 3084 | if (fd < 0 || fd >= MAXDESC) |
| 3085 | { |
| 3086 | errno = EBADF; |
| 3087 | return -1; |
| 3088 | } |
| 3089 | |
| 3090 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 3091 | { |
| 3092 | child_process *cp = fd_info[fd].cp; |
| 3093 | |
| 3094 | if ((fd_info[fd].flags & FILE_READ) == 0) |
| 3095 | { |
| 3096 | errno = EBADF; |
| 3097 | return -1; |
| 3098 | } |
| 3099 | |
| 3100 | nchars = 0; |
| 3101 | |
| 3102 | /* re-read CR carried over from last read */ |
| 3103 | if (fd_info[fd].flags & FILE_LAST_CR) |
| 3104 | { |
| 3105 | if (fd_info[fd].flags & FILE_BINARY) abort (); |
| 3106 | *buffer++ = 0x0d; |
| 3107 | count--; |
| 3108 | nchars++; |
| 3109 | fd_info[fd].flags &= ~FILE_LAST_CR; |
| 3110 | } |
| 3111 | |
| 3112 | /* presence of a child_process structure means we are operating in |
| 3113 | non-blocking mode - otherwise we just call _read directly. |
| 3114 | Note that the child_process structure might be missing because |
| 3115 | reap_subprocess has been called; in this case the pipe is |
| 3116 | already broken, so calling _read on it is okay. */ |
| 3117 | if (cp) |
| 3118 | { |
| 3119 | int current_status = cp->status; |
| 3120 | |
| 3121 | switch (current_status) |
| 3122 | { |
| 3123 | case STATUS_READ_FAILED: |
| 3124 | case STATUS_READ_ERROR: |
| 3125 | /* report normal EOF if nothing in buffer */ |
| 3126 | if (nchars <= 0) |
| 3127 | fd_info[fd].flags |= FILE_AT_EOF; |
| 3128 | return nchars; |
| 3129 | |
| 3130 | case STATUS_READ_READY: |
| 3131 | case STATUS_READ_IN_PROGRESS: |
| 3132 | DebPrint (("sys_read called when read is in progress\n")); |
| 3133 | errno = EWOULDBLOCK; |
| 3134 | return -1; |
| 3135 | |
| 3136 | case STATUS_READ_SUCCEEDED: |
| 3137 | /* consume read-ahead char */ |
| 3138 | *buffer++ = cp->chr; |
| 3139 | count--; |
| 3140 | nchars++; |
| 3141 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 3142 | ResetEvent (cp->char_avail); |
| 3143 | |
| 3144 | case STATUS_READ_ACKNOWLEDGED: |
| 3145 | break; |
| 3146 | |
| 3147 | default: |
| 3148 | DebPrint (("sys_read: bad status %d\n", current_status)); |
| 3149 | errno = EBADF; |
| 3150 | return -1; |
| 3151 | } |
| 3152 | |
| 3153 | if (fd_info[fd].flags & FILE_PIPE) |
| 3154 | { |
| 3155 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); |
| 3156 | to_read = min (waiting, (DWORD) count); |
| 3157 | |
| 3158 | if (to_read > 0) |
| 3159 | nchars += _read (fd, buffer, to_read); |
| 3160 | } |
| 3161 | #ifdef HAVE_SOCKETS |
| 3162 | else /* FILE_SOCKET */ |
| 3163 | { |
| 3164 | if (winsock_lib == NULL) abort (); |
| 3165 | |
| 3166 | /* do the equivalent of a non-blocking read */ |
| 3167 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); |
| 3168 | if (waiting == 0 && nchars == 0) |
| 3169 | { |
| 3170 | h_errno = errno = EWOULDBLOCK; |
| 3171 | return -1; |
| 3172 | } |
| 3173 | |
| 3174 | if (waiting) |
| 3175 | { |
| 3176 | /* always use binary mode for sockets */ |
| 3177 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
| 3178 | if (res == SOCKET_ERROR) |
| 3179 | { |
| 3180 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", |
| 3181 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 3182 | set_errno (); |
| 3183 | return -1; |
| 3184 | } |
| 3185 | nchars += res; |
| 3186 | } |
| 3187 | } |
| 3188 | #endif |
| 3189 | } |
| 3190 | else |
| 3191 | { |
| 3192 | int nread = _read (fd, buffer, count); |
| 3193 | if (nread >= 0) |
| 3194 | nchars += nread; |
| 3195 | else if (nchars == 0) |
| 3196 | nchars = nread; |
| 3197 | } |
| 3198 | |
| 3199 | if (nchars <= 0) |
| 3200 | fd_info[fd].flags |= FILE_AT_EOF; |
| 3201 | /* Perform text mode translation if required. */ |
| 3202 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 3203 | { |
| 3204 | nchars = crlf_to_lf (nchars, orig_buffer); |
| 3205 | /* If buffer contains only CR, return that. To be absolutely |
| 3206 | sure we should attempt to read the next char, but in |
| 3207 | practice a CR to be followed by LF would not appear by |
| 3208 | itself in the buffer. */ |
| 3209 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) |
| 3210 | { |
| 3211 | fd_info[fd].flags |= FILE_LAST_CR; |
| 3212 | nchars--; |
| 3213 | } |
| 3214 | } |
| 3215 | } |
| 3216 | else |
| 3217 | nchars = _read (fd, buffer, count); |
| 3218 | |
| 3219 | return nchars; |
| 3220 | } |
| 3221 | |
| 3222 | /* For now, don't bother with a non-blocking mode */ |
| 3223 | int |
| 3224 | sys_write (int fd, const void * buffer, unsigned int count) |
| 3225 | { |
| 3226 | int nchars; |
| 3227 | |
| 3228 | if (fd < 0 || fd >= MAXDESC) |
| 3229 | { |
| 3230 | errno = EBADF; |
| 3231 | return -1; |
| 3232 | } |
| 3233 | |
| 3234 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 3235 | { |
| 3236 | if ((fd_info[fd].flags & FILE_WRITE) == 0) |
| 3237 | { |
| 3238 | errno = EBADF; |
| 3239 | return -1; |
| 3240 | } |
| 3241 | |
| 3242 | /* Perform text mode translation if required. */ |
| 3243 | if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 3244 | { |
| 3245 | char * tmpbuf = alloca (count * 2); |
| 3246 | unsigned char * src = (void *)buffer; |
| 3247 | unsigned char * dst = tmpbuf; |
| 3248 | int nbytes = count; |
| 3249 | |
| 3250 | while (1) |
| 3251 | { |
| 3252 | unsigned char *next; |
| 3253 | /* copy next line or remaining bytes */ |
| 3254 | next = _memccpy (dst, src, '\n', nbytes); |
| 3255 | if (next) |
| 3256 | { |
| 3257 | /* copied one line ending with '\n' */ |
| 3258 | int copied = next - dst; |
| 3259 | nbytes -= copied; |
| 3260 | src += copied; |
| 3261 | /* insert '\r' before '\n' */ |
| 3262 | next[-1] = '\r'; |
| 3263 | next[0] = '\n'; |
| 3264 | dst = next + 1; |
| 3265 | count++; |
| 3266 | } |
| 3267 | else |
| 3268 | /* copied remaining partial line -> now finished */ |
| 3269 | break; |
| 3270 | } |
| 3271 | buffer = tmpbuf; |
| 3272 | } |
| 3273 | } |
| 3274 | |
| 3275 | #ifdef HAVE_SOCKETS |
| 3276 | if (fd_info[fd].flags & FILE_SOCKET) |
| 3277 | { |
| 3278 | if (winsock_lib == NULL) abort (); |
| 3279 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
| 3280 | if (nchars == SOCKET_ERROR) |
| 3281 | { |
| 3282 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", |
| 3283 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 3284 | set_errno (); |
| 3285 | } |
| 3286 | } |
| 3287 | else |
| 3288 | #endif |
| 3289 | nchars = _write (fd, buffer, count); |
| 3290 | |
| 3291 | return nchars; |
| 3292 | } |
| 3293 | |
| 3294 | static void |
| 3295 | check_windows_init_file () |
| 3296 | { |
| 3297 | extern int noninteractive, inhibit_window_system; |
| 3298 | |
| 3299 | /* A common indication that Emacs is not installed properly is when |
| 3300 | it cannot find the Windows installation file. If this file does |
| 3301 | not exist in the expected place, tell the user. */ |
| 3302 | |
| 3303 | if (!noninteractive && !inhibit_window_system) |
| 3304 | { |
| 3305 | extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p; |
| 3306 | Lisp_Object objs[2]; |
| 3307 | Lisp_Object full_load_path; |
| 3308 | Lisp_Object init_file; |
| 3309 | int fd; |
| 3310 | |
| 3311 | objs[0] = Vload_path; |
| 3312 | objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH"))); |
| 3313 | full_load_path = Fappend (2, objs); |
| 3314 | init_file = build_string ("term/w32-win"); |
| 3315 | fd = openp (full_load_path, init_file, ".el:.elc", NULL, 0); |
| 3316 | if (fd < 0) |
| 3317 | { |
| 3318 | Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil); |
| 3319 | char *init_file_name = XSTRING (init_file)->data; |
| 3320 | char *load_path = XSTRING (load_path_print)->data; |
| 3321 | char *buffer = alloca (1024); |
| 3322 | |
| 3323 | sprintf (buffer, |
| 3324 | "The Emacs Windows initialization file \"%s.el\" " |
| 3325 | "could not be found in your Emacs installation. " |
| 3326 | "Emacs checked the following directories for this file:\n" |
| 3327 | "\n%s\n\n" |
| 3328 | "When Emacs cannot find this file, it usually means that it " |
| 3329 | "was not installed properly, or its distribution file was " |
| 3330 | "not unpacked properly.\nSee the README.W32 file in the " |
| 3331 | "top-level Emacs directory for more information.", |
| 3332 | init_file_name, load_path); |
| 3333 | MessageBox (NULL, |
| 3334 | buffer, |
| 3335 | "Emacs Abort Dialog", |
| 3336 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); |
| 3337 | /* Use the low-level Emacs abort. */ |
| 3338 | #undef abort |
| 3339 | abort (); |
| 3340 | } |
| 3341 | else |
| 3342 | { |
| 3343 | _close (fd); |
| 3344 | } |
| 3345 | } |
| 3346 | } |
| 3347 | |
| 3348 | void |
| 3349 | term_ntproc () |
| 3350 | { |
| 3351 | #ifdef HAVE_SOCKETS |
| 3352 | /* shutdown the socket interface if necessary */ |
| 3353 | term_winsock (); |
| 3354 | #endif |
| 3355 | } |
| 3356 | |
| 3357 | void |
| 3358 | init_ntproc () |
| 3359 | { |
| 3360 | #ifdef HAVE_SOCKETS |
| 3361 | /* Initialise the socket interface now if available and requested by |
| 3362 | the user by defining PRELOAD_WINSOCK; otherwise loading will be |
| 3363 | delayed until open-network-stream is called (w32-has-winsock can |
| 3364 | also be used to dynamically load or reload winsock). |
| 3365 | |
| 3366 | Conveniently, init_environment is called before us, so |
| 3367 | PRELOAD_WINSOCK can be set in the registry. */ |
| 3368 | |
| 3369 | /* Always initialize this correctly. */ |
| 3370 | winsock_lib = NULL; |
| 3371 | |
| 3372 | if (getenv ("PRELOAD_WINSOCK") != NULL) |
| 3373 | init_winsock (TRUE); |
| 3374 | #endif |
| 3375 | |
| 3376 | /* Initial preparation for subprocess support: replace our standard |
| 3377 | handles with non-inheritable versions. */ |
| 3378 | { |
| 3379 | HANDLE parent; |
| 3380 | HANDLE stdin_save = INVALID_HANDLE_VALUE; |
| 3381 | HANDLE stdout_save = INVALID_HANDLE_VALUE; |
| 3382 | HANDLE stderr_save = INVALID_HANDLE_VALUE; |
| 3383 | |
| 3384 | parent = GetCurrentProcess (); |
| 3385 | |
| 3386 | /* ignore errors when duplicating and closing; typically the |
| 3387 | handles will be invalid when running as a gui program. */ |
| 3388 | DuplicateHandle (parent, |
| 3389 | GetStdHandle (STD_INPUT_HANDLE), |
| 3390 | parent, |
| 3391 | &stdin_save, |
| 3392 | 0, |
| 3393 | FALSE, |
| 3394 | DUPLICATE_SAME_ACCESS); |
| 3395 | |
| 3396 | DuplicateHandle (parent, |
| 3397 | GetStdHandle (STD_OUTPUT_HANDLE), |
| 3398 | parent, |
| 3399 | &stdout_save, |
| 3400 | 0, |
| 3401 | FALSE, |
| 3402 | DUPLICATE_SAME_ACCESS); |
| 3403 | |
| 3404 | DuplicateHandle (parent, |
| 3405 | GetStdHandle (STD_ERROR_HANDLE), |
| 3406 | parent, |
| 3407 | &stderr_save, |
| 3408 | 0, |
| 3409 | FALSE, |
| 3410 | DUPLICATE_SAME_ACCESS); |
| 3411 | |
| 3412 | fclose (stdin); |
| 3413 | fclose (stdout); |
| 3414 | fclose (stderr); |
| 3415 | |
| 3416 | if (stdin_save != INVALID_HANDLE_VALUE) |
| 3417 | _open_osfhandle ((long) stdin_save, O_TEXT); |
| 3418 | else |
| 3419 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
| 3420 | _fdopen (0, "r"); |
| 3421 | |
| 3422 | if (stdout_save != INVALID_HANDLE_VALUE) |
| 3423 | _open_osfhandle ((long) stdout_save, O_TEXT); |
| 3424 | else |
| 3425 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 3426 | _fdopen (1, "w"); |
| 3427 | |
| 3428 | if (stderr_save != INVALID_HANDLE_VALUE) |
| 3429 | _open_osfhandle ((long) stderr_save, O_TEXT); |
| 3430 | else |
| 3431 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 3432 | _fdopen (2, "w"); |
| 3433 | } |
| 3434 | |
| 3435 | /* unfortunately, atexit depends on implementation of malloc */ |
| 3436 | /* atexit (term_ntproc); */ |
| 3437 | signal (SIGABRT, term_ntproc); |
| 3438 | |
| 3439 | /* determine which drives are fixed, for GetCachedVolumeInformation */ |
| 3440 | { |
| 3441 | /* GetDriveType must have trailing backslash. */ |
| 3442 | char drive[] = "A:\\"; |
| 3443 | |
| 3444 | /* Loop over all possible drive letters */ |
| 3445 | while (*drive <= 'Z') |
| 3446 | { |
| 3447 | /* Record if this drive letter refers to a fixed drive. */ |
| 3448 | fixed_drives[DRIVE_INDEX (*drive)] = |
| 3449 | (GetDriveType (drive) == DRIVE_FIXED); |
| 3450 | |
| 3451 | (*drive)++; |
| 3452 | } |
| 3453 | |
| 3454 | /* Reset the volume info cache. */ |
| 3455 | volume_cache = NULL; |
| 3456 | } |
| 3457 | |
| 3458 | /* Check to see if Emacs has been installed correctly. */ |
| 3459 | check_windows_init_file (); |
| 3460 | } |
| 3461 | |
| 3462 | /* end of nt.c */ |