| 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/time.h> |
| 34 | |
| 35 | /* must include CRT headers *before* config.h */ |
| 36 | #include "config.h" |
| 37 | #undef access |
| 38 | #undef chdir |
| 39 | #undef chmod |
| 40 | #undef creat |
| 41 | #undef ctime |
| 42 | #undef fopen |
| 43 | #undef link |
| 44 | #undef mkdir |
| 45 | #undef mktemp |
| 46 | #undef open |
| 47 | #undef rename |
| 48 | #undef rmdir |
| 49 | #undef unlink |
| 50 | |
| 51 | #undef close |
| 52 | #undef dup |
| 53 | #undef dup2 |
| 54 | #undef pipe |
| 55 | #undef read |
| 56 | #undef write |
| 57 | |
| 58 | #include "lisp.h" |
| 59 | |
| 60 | #include <pwd.h> |
| 61 | |
| 62 | #include <windows.h> |
| 63 | |
| 64 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 65 | #include <sys/socket.h> |
| 66 | #undef socket |
| 67 | #undef bind |
| 68 | #undef connect |
| 69 | #undef htons |
| 70 | #undef ntohs |
| 71 | #undef inet_addr |
| 72 | #undef gethostname |
| 73 | #undef gethostbyname |
| 74 | #undef getservbyname |
| 75 | #undef shutdown |
| 76 | #endif |
| 77 | |
| 78 | #include "w32.h" |
| 79 | #include "ndir.h" |
| 80 | #include "w32heap.h" |
| 81 | |
| 82 | extern Lisp_Object Vw32_downcase_file_names; |
| 83 | extern Lisp_Object Vw32_generate_fake_inodes; |
| 84 | extern Lisp_Object Vw32_get_true_file_attributes; |
| 85 | |
| 86 | static char startup_dir[MAXPATHLEN]; |
| 87 | |
| 88 | /* Get the current working directory. */ |
| 89 | char * |
| 90 | getwd (char *dir) |
| 91 | { |
| 92 | #if 0 |
| 93 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
| 94 | return dir; |
| 95 | return NULL; |
| 96 | #else |
| 97 | /* Emacs doesn't actually change directory itself, and we want to |
| 98 | force our real wd to be where emacs.exe is to avoid unnecessary |
| 99 | conflicts when trying to rename or delete directories. */ |
| 100 | strcpy (dir, startup_dir); |
| 101 | return dir; |
| 102 | #endif |
| 103 | } |
| 104 | |
| 105 | #ifndef HAVE_SOCKETS |
| 106 | /* Emulate gethostname. */ |
| 107 | int |
| 108 | gethostname (char *buffer, int size) |
| 109 | { |
| 110 | /* NT only allows small host names, so the buffer is |
| 111 | certainly large enough. */ |
| 112 | return !GetComputerName (buffer, &size); |
| 113 | } |
| 114 | #endif /* HAVE_SOCKETS */ |
| 115 | |
| 116 | /* Emulate getloadavg. */ |
| 117 | int |
| 118 | getloadavg (double loadavg[], int nelem) |
| 119 | { |
| 120 | int i; |
| 121 | |
| 122 | /* A faithful emulation is going to have to be saved for a rainy day. */ |
| 123 | for (i = 0; i < nelem; i++) |
| 124 | { |
| 125 | loadavg[i] = 0.0; |
| 126 | } |
| 127 | return i; |
| 128 | } |
| 129 | |
| 130 | /* Emulate getpwuid, getpwnam and others. */ |
| 131 | |
| 132 | #define PASSWD_FIELD_SIZE 256 |
| 133 | |
| 134 | static char the_passwd_name[PASSWD_FIELD_SIZE]; |
| 135 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; |
| 136 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; |
| 137 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; |
| 138 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; |
| 139 | |
| 140 | static struct passwd the_passwd = |
| 141 | { |
| 142 | the_passwd_name, |
| 143 | the_passwd_passwd, |
| 144 | 0, |
| 145 | 0, |
| 146 | 0, |
| 147 | the_passwd_gecos, |
| 148 | the_passwd_dir, |
| 149 | the_passwd_shell, |
| 150 | }; |
| 151 | |
| 152 | int |
| 153 | getuid () |
| 154 | { |
| 155 | return the_passwd.pw_uid; |
| 156 | } |
| 157 | |
| 158 | int |
| 159 | geteuid () |
| 160 | { |
| 161 | /* I could imagine arguing for checking to see whether the user is |
| 162 | in the Administrators group and returning a UID of 0 for that |
| 163 | case, but I don't know how wise that would be in the long run. */ |
| 164 | return getuid (); |
| 165 | } |
| 166 | |
| 167 | int |
| 168 | getgid () |
| 169 | { |
| 170 | return the_passwd.pw_gid; |
| 171 | } |
| 172 | |
| 173 | int |
| 174 | getegid () |
| 175 | { |
| 176 | return getgid (); |
| 177 | } |
| 178 | |
| 179 | struct passwd * |
| 180 | getpwuid (int uid) |
| 181 | { |
| 182 | if (uid == the_passwd.pw_uid) |
| 183 | return &the_passwd; |
| 184 | return NULL; |
| 185 | } |
| 186 | |
| 187 | struct passwd * |
| 188 | getpwnam (char *name) |
| 189 | { |
| 190 | struct passwd *pw; |
| 191 | |
| 192 | pw = getpwuid (getuid ()); |
| 193 | if (!pw) |
| 194 | return pw; |
| 195 | |
| 196 | if (stricmp (name, pw->pw_name)) |
| 197 | return NULL; |
| 198 | |
| 199 | return pw; |
| 200 | } |
| 201 | |
| 202 | void |
| 203 | init_user_info () |
| 204 | { |
| 205 | /* Find the user's real name by opening the process token and |
| 206 | looking up the name associated with the user-sid in that token. |
| 207 | |
| 208 | Use the relative portion of the identifier authority value from |
| 209 | the user-sid as the user id value (same for group id using the |
| 210 | primary group sid from the process token). */ |
| 211 | |
| 212 | char user_sid[256], name[256], domain[256]; |
| 213 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; |
| 214 | HANDLE token = NULL; |
| 215 | SID_NAME_USE user_type; |
| 216 | |
| 217 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) |
| 218 | && GetTokenInformation (token, TokenUser, |
| 219 | (PVOID) user_sid, sizeof (user_sid), &trash) |
| 220 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, |
| 221 | domain, &dlength, &user_type)) |
| 222 | { |
| 223 | strcpy (the_passwd.pw_name, name); |
| 224 | /* Determine a reasonable uid value. */ |
| 225 | if (stricmp ("administrator", name) == 0) |
| 226 | { |
| 227 | the_passwd.pw_uid = 0; |
| 228 | the_passwd.pw_gid = 0; |
| 229 | } |
| 230 | else |
| 231 | { |
| 232 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 233 | |
| 234 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 235 | /* I believe the relative portion is the last 4 bytes (of 6) |
| 236 | with msb first. */ |
| 237 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + |
| 238 | (pSIA->Value[3] << 16) + |
| 239 | (pSIA->Value[4] << 8) + |
| 240 | (pSIA->Value[5] << 0)); |
| 241 | /* restrict to conventional uid range for normal users */ |
| 242 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; |
| 243 | |
| 244 | /* Get group id */ |
| 245 | if (GetTokenInformation (token, TokenPrimaryGroup, |
| 246 | (PVOID) user_sid, sizeof (user_sid), &trash)) |
| 247 | { |
| 248 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 249 | |
| 250 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 251 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + |
| 252 | (pSIA->Value[3] << 16) + |
| 253 | (pSIA->Value[4] << 8) + |
| 254 | (pSIA->Value[5] << 0)); |
| 255 | /* I don't know if this is necessary, but for safety... */ |
| 256 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; |
| 257 | } |
| 258 | else |
| 259 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 260 | } |
| 261 | } |
| 262 | /* If security calls are not supported (presumably because we |
| 263 | are running under Windows 95), fallback to this. */ |
| 264 | else if (GetUserName (name, &length)) |
| 265 | { |
| 266 | strcpy (the_passwd.pw_name, name); |
| 267 | if (stricmp ("administrator", name) == 0) |
| 268 | the_passwd.pw_uid = 0; |
| 269 | else |
| 270 | the_passwd.pw_uid = 123; |
| 271 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 272 | } |
| 273 | else |
| 274 | { |
| 275 | strcpy (the_passwd.pw_name, "unknown"); |
| 276 | the_passwd.pw_uid = 123; |
| 277 | the_passwd.pw_gid = 123; |
| 278 | } |
| 279 | |
| 280 | /* Ensure HOME and SHELL are defined. */ |
| 281 | if (getenv ("HOME") == NULL) |
| 282 | putenv ("HOME=c:/"); |
| 283 | if (getenv ("SHELL") == NULL) |
| 284 | putenv (os_subtype == OS_WIN95 ? "SHELL=command" : "SHELL=cmd"); |
| 285 | |
| 286 | /* Set dir and shell from environment variables. */ |
| 287 | strcpy (the_passwd.pw_dir, getenv ("HOME")); |
| 288 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); |
| 289 | |
| 290 | if (token) |
| 291 | CloseHandle (token); |
| 292 | } |
| 293 | |
| 294 | int |
| 295 | random () |
| 296 | { |
| 297 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
| 298 | return ((rand () << 15) | rand ()); |
| 299 | } |
| 300 | |
| 301 | void |
| 302 | srandom (int seed) |
| 303 | { |
| 304 | srand (seed); |
| 305 | } |
| 306 | |
| 307 | |
| 308 | /* Normalize filename by converting all path separators to |
| 309 | the specified separator. Also conditionally convert upper |
| 310 | case path name components to lower case. */ |
| 311 | |
| 312 | static void |
| 313 | normalize_filename (fp, path_sep) |
| 314 | register char *fp; |
| 315 | char path_sep; |
| 316 | { |
| 317 | char sep; |
| 318 | char *elem; |
| 319 | |
| 320 | /* Always lower-case drive letters a-z, even if the filesystem |
| 321 | preserves case in filenames. |
| 322 | This is so filenames can be compared by string comparison |
| 323 | functions that are case-sensitive. Even case-preserving filesystems |
| 324 | do not distinguish case in drive letters. */ |
| 325 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') |
| 326 | { |
| 327 | *fp += 'a' - 'A'; |
| 328 | fp += 2; |
| 329 | } |
| 330 | |
| 331 | if (NILP (Vw32_downcase_file_names)) |
| 332 | { |
| 333 | while (*fp) |
| 334 | { |
| 335 | if (*fp == '/' || *fp == '\\') |
| 336 | *fp = path_sep; |
| 337 | fp++; |
| 338 | } |
| 339 | return; |
| 340 | } |
| 341 | |
| 342 | sep = path_sep; /* convert to this path separator */ |
| 343 | elem = fp; /* start of current path element */ |
| 344 | |
| 345 | do { |
| 346 | if (*fp >= 'a' && *fp <= 'z') |
| 347 | elem = 0; /* don't convert this element */ |
| 348 | |
| 349 | if (*fp == 0 || *fp == ':') |
| 350 | { |
| 351 | sep = *fp; /* restore current separator (or 0) */ |
| 352 | *fp = '/'; /* after conversion of this element */ |
| 353 | } |
| 354 | |
| 355 | if (*fp == '/' || *fp == '\\') |
| 356 | { |
| 357 | if (elem && elem != fp) |
| 358 | { |
| 359 | *fp = 0; /* temporary end of string */ |
| 360 | _strlwr (elem); /* while we convert to lower case */ |
| 361 | } |
| 362 | *fp = sep; /* convert (or restore) path separator */ |
| 363 | elem = fp + 1; /* next element starts after separator */ |
| 364 | sep = path_sep; |
| 365 | } |
| 366 | } while (*fp++); |
| 367 | } |
| 368 | |
| 369 | /* Destructively turn backslashes into slashes. */ |
| 370 | void |
| 371 | dostounix_filename (p) |
| 372 | register char *p; |
| 373 | { |
| 374 | normalize_filename (p, '/'); |
| 375 | } |
| 376 | |
| 377 | /* Destructively turn slashes into backslashes. */ |
| 378 | void |
| 379 | unixtodos_filename (p) |
| 380 | register char *p; |
| 381 | { |
| 382 | normalize_filename (p, '\\'); |
| 383 | } |
| 384 | |
| 385 | /* Remove all CR's that are followed by a LF. |
| 386 | (From msdos.c...probably should figure out a way to share it, |
| 387 | although this code isn't going to ever change.) */ |
| 388 | int |
| 389 | crlf_to_lf (n, buf) |
| 390 | register int n; |
| 391 | register unsigned char *buf; |
| 392 | { |
| 393 | unsigned char *np = buf; |
| 394 | unsigned char *startp = buf; |
| 395 | unsigned char *endp = buf + n; |
| 396 | |
| 397 | if (n == 0) |
| 398 | return n; |
| 399 | while (buf < endp - 1) |
| 400 | { |
| 401 | if (*buf == 0x0d) |
| 402 | { |
| 403 | if (*(++buf) != 0x0a) |
| 404 | *np++ = 0x0d; |
| 405 | } |
| 406 | else |
| 407 | *np++ = *buf++; |
| 408 | } |
| 409 | if (buf < endp) |
| 410 | *np++ = *buf++; |
| 411 | return np - startp; |
| 412 | } |
| 413 | |
| 414 | /* Parse the root part of file name, if present. Return length and |
| 415 | optionally store pointer to char after root. */ |
| 416 | static int |
| 417 | parse_root (char * name, char ** pPath) |
| 418 | { |
| 419 | char * start = name; |
| 420 | |
| 421 | if (name == NULL) |
| 422 | return 0; |
| 423 | |
| 424 | /* find the root name of the volume if given */ |
| 425 | if (isalpha (name[0]) && name[1] == ':') |
| 426 | { |
| 427 | /* skip past drive specifier */ |
| 428 | name += 2; |
| 429 | if (IS_DIRECTORY_SEP (name[0])) |
| 430 | name++; |
| 431 | } |
| 432 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 433 | { |
| 434 | int slashes = 2; |
| 435 | name += 2; |
| 436 | do |
| 437 | { |
| 438 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 439 | break; |
| 440 | name++; |
| 441 | } |
| 442 | while ( *name ); |
| 443 | if (IS_DIRECTORY_SEP (name[0])) |
| 444 | name++; |
| 445 | } |
| 446 | |
| 447 | if (pPath) |
| 448 | *pPath = name; |
| 449 | |
| 450 | return name - start; |
| 451 | } |
| 452 | |
| 453 | /* Get long base name for name; name is assumed to be absolute. */ |
| 454 | static int |
| 455 | get_long_basename (char * name, char * buf, int size) |
| 456 | { |
| 457 | WIN32_FIND_DATA find_data; |
| 458 | HANDLE dir_handle; |
| 459 | int len = 0; |
| 460 | |
| 461 | dir_handle = FindFirstFile (name, &find_data); |
| 462 | if (dir_handle != INVALID_HANDLE_VALUE) |
| 463 | { |
| 464 | if ((len = strlen (find_data.cFileName)) < size) |
| 465 | memcpy (buf, find_data.cFileName, len + 1); |
| 466 | else |
| 467 | len = 0; |
| 468 | FindClose (dir_handle); |
| 469 | } |
| 470 | return len; |
| 471 | } |
| 472 | |
| 473 | /* Get long name for file, if possible (assumed to be absolute). */ |
| 474 | BOOL |
| 475 | w32_get_long_filename (char * name, char * buf, int size) |
| 476 | { |
| 477 | char * o = buf; |
| 478 | char * p; |
| 479 | char * q; |
| 480 | char full[ MAX_PATH ]; |
| 481 | int len; |
| 482 | |
| 483 | len = strlen (name); |
| 484 | if (len >= MAX_PATH) |
| 485 | return FALSE; |
| 486 | |
| 487 | /* Use local copy for destructive modification. */ |
| 488 | memcpy (full, name, len+1); |
| 489 | unixtodos_filename (full); |
| 490 | |
| 491 | /* Copy root part verbatim. */ |
| 492 | len = parse_root (full, &p); |
| 493 | memcpy (o, full, len); |
| 494 | o += len; |
| 495 | size -= len; |
| 496 | |
| 497 | do |
| 498 | { |
| 499 | q = p; |
| 500 | p = strchr (q, '\\'); |
| 501 | if (p) *p = '\0'; |
| 502 | len = get_long_basename (full, o, size); |
| 503 | if (len > 0) |
| 504 | { |
| 505 | o += len; |
| 506 | size -= len; |
| 507 | if (p != NULL) |
| 508 | { |
| 509 | *p++ = '\\'; |
| 510 | if (size < 2) |
| 511 | return FALSE; |
| 512 | *o++ = '\\'; |
| 513 | size--; |
| 514 | *o = '\0'; |
| 515 | } |
| 516 | } |
| 517 | else |
| 518 | return FALSE; |
| 519 | } |
| 520 | while (p != NULL && *p); |
| 521 | |
| 522 | return TRUE; |
| 523 | } |
| 524 | |
| 525 | |
| 526 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
| 527 | |
| 528 | int |
| 529 | sigsetmask (int signal_mask) |
| 530 | { |
| 531 | return 0; |
| 532 | } |
| 533 | |
| 534 | int |
| 535 | sigblock (int sig) |
| 536 | { |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | int |
| 541 | setpgrp (int pid, int gid) |
| 542 | { |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | int |
| 547 | alarm (int seconds) |
| 548 | { |
| 549 | return 0; |
| 550 | } |
| 551 | |
| 552 | int |
| 553 | unrequest_sigio (void) |
| 554 | { |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | int |
| 559 | request_sigio (void) |
| 560 | { |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
| 565 | |
| 566 | LPBYTE |
| 567 | w32_get_resource (key, lpdwtype) |
| 568 | char *key; |
| 569 | LPDWORD lpdwtype; |
| 570 | { |
| 571 | LPBYTE lpvalue; |
| 572 | HKEY hrootkey = NULL; |
| 573 | DWORD cbData; |
| 574 | BOOL ok = FALSE; |
| 575 | |
| 576 | /* Check both the current user and the local machine to see if |
| 577 | we have any resources. */ |
| 578 | |
| 579 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 580 | { |
| 581 | lpvalue = NULL; |
| 582 | |
| 583 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 584 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 585 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 586 | { |
| 587 | return (lpvalue); |
| 588 | } |
| 589 | |
| 590 | if (lpvalue) xfree (lpvalue); |
| 591 | |
| 592 | RegCloseKey (hrootkey); |
| 593 | } |
| 594 | |
| 595 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 596 | { |
| 597 | lpvalue = NULL; |
| 598 | |
| 599 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 600 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 601 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 602 | { |
| 603 | return (lpvalue); |
| 604 | } |
| 605 | |
| 606 | if (lpvalue) xfree (lpvalue); |
| 607 | |
| 608 | RegCloseKey (hrootkey); |
| 609 | } |
| 610 | |
| 611 | return (NULL); |
| 612 | } |
| 613 | |
| 614 | char *get_emacs_configuration (void); |
| 615 | extern Lisp_Object Vsystem_configuration; |
| 616 | |
| 617 | void |
| 618 | init_environment () |
| 619 | { |
| 620 | /* Check for environment variables and use registry if they don't exist */ |
| 621 | { |
| 622 | int i; |
| 623 | LPBYTE lpval; |
| 624 | DWORD dwType; |
| 625 | |
| 626 | static char * env_vars[] = |
| 627 | { |
| 628 | "HOME", |
| 629 | "PRELOAD_WINSOCK", |
| 630 | "emacs_dir", |
| 631 | "EMACSLOADPATH", |
| 632 | "SHELL", |
| 633 | "CMDPROXY", |
| 634 | "EMACSDATA", |
| 635 | "EMACSPATH", |
| 636 | "EMACSLOCKDIR", |
| 637 | /* We no longer set INFOPATH because Info-default-directory-list |
| 638 | is then ignored. We use a hook in winnt.el instead. */ |
| 639 | /* "INFOPATH", */ |
| 640 | "EMACSDOC", |
| 641 | "TERM", |
| 642 | }; |
| 643 | |
| 644 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 645 | { |
| 646 | if (!getenv (env_vars[i]) |
| 647 | && (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL) |
| 648 | { |
| 649 | if (dwType == REG_EXPAND_SZ) |
| 650 | { |
| 651 | char buf1[500], buf2[500]; |
| 652 | |
| 653 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, 500); |
| 654 | _snprintf (buf2, 499, "%s=%s", env_vars[i], buf1); |
| 655 | putenv (strdup (buf2)); |
| 656 | } |
| 657 | else if (dwType == REG_SZ) |
| 658 | { |
| 659 | char buf[500]; |
| 660 | |
| 661 | _snprintf (buf, 499, "%s=%s", env_vars[i], lpval); |
| 662 | putenv (strdup (buf)); |
| 663 | } |
| 664 | |
| 665 | xfree (lpval); |
| 666 | } |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | /* Rebuild system configuration to reflect invoking system. */ |
| 671 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); |
| 672 | |
| 673 | /* Another special case: on NT, the PATH variable is actually named |
| 674 | "Path" although cmd.exe (perhaps NT itself) arranges for |
| 675 | environment variable lookup and setting to be case insensitive. |
| 676 | However, Emacs assumes a fully case sensitive environment, so we |
| 677 | need to change "Path" to "PATH" to match the expectations of |
| 678 | various elisp packages. We do this by the sneaky method of |
| 679 | modifying the string in the C runtime environ entry. |
| 680 | |
| 681 | The same applies to COMSPEC. */ |
| 682 | { |
| 683 | char ** envp; |
| 684 | |
| 685 | for (envp = environ; *envp; envp++) |
| 686 | if (_strnicmp (*envp, "PATH=", 5) == 0) |
| 687 | memcpy (*envp, "PATH=", 5); |
| 688 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) |
| 689 | memcpy (*envp, "COMSPEC=", 8); |
| 690 | } |
| 691 | |
| 692 | /* Remember the initial working directory for getwd, then make the |
| 693 | real wd be the location of emacs.exe to avoid conflicts when |
| 694 | renaming or deleting directories. (We also don't call chdir when |
| 695 | running subprocesses for the same reason.) */ |
| 696 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) |
| 697 | abort (); |
| 698 | |
| 699 | { |
| 700 | char *p; |
| 701 | char modname[MAX_PATH]; |
| 702 | |
| 703 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 704 | abort (); |
| 705 | if ((p = strrchr (modname, '\\')) == NULL) |
| 706 | abort (); |
| 707 | *p = 0; |
| 708 | |
| 709 | SetCurrentDirectory (modname); |
| 710 | } |
| 711 | |
| 712 | init_user_info (); |
| 713 | } |
| 714 | |
| 715 | /* We don't have scripts to automatically determine the system configuration |
| 716 | for Emacs before it's compiled, and we don't want to have to make the |
| 717 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime |
| 718 | routine. */ |
| 719 | |
| 720 | static char configuration_buffer[32]; |
| 721 | |
| 722 | char * |
| 723 | get_emacs_configuration (void) |
| 724 | { |
| 725 | char *arch, *oem, *os; |
| 726 | |
| 727 | /* Determine the processor type. */ |
| 728 | switch (get_processor_type ()) |
| 729 | { |
| 730 | |
| 731 | #ifdef PROCESSOR_INTEL_386 |
| 732 | case PROCESSOR_INTEL_386: |
| 733 | case PROCESSOR_INTEL_486: |
| 734 | case PROCESSOR_INTEL_PENTIUM: |
| 735 | arch = "i386"; |
| 736 | break; |
| 737 | #endif |
| 738 | |
| 739 | #ifdef PROCESSOR_INTEL_860 |
| 740 | case PROCESSOR_INTEL_860: |
| 741 | arch = "i860"; |
| 742 | break; |
| 743 | #endif |
| 744 | |
| 745 | #ifdef PROCESSOR_MIPS_R2000 |
| 746 | case PROCESSOR_MIPS_R2000: |
| 747 | case PROCESSOR_MIPS_R3000: |
| 748 | case PROCESSOR_MIPS_R4000: |
| 749 | arch = "mips"; |
| 750 | break; |
| 751 | #endif |
| 752 | |
| 753 | #ifdef PROCESSOR_ALPHA_21064 |
| 754 | case PROCESSOR_ALPHA_21064: |
| 755 | arch = "alpha"; |
| 756 | break; |
| 757 | #endif |
| 758 | |
| 759 | default: |
| 760 | arch = "unknown"; |
| 761 | break; |
| 762 | } |
| 763 | |
| 764 | /* Let oem be "*" until we figure out how to decode the OEM field. */ |
| 765 | oem = "*"; |
| 766 | |
| 767 | os = (GetVersion () & OS_WIN95) ? "windows95" : "nt"; |
| 768 | |
| 769 | sprintf (configuration_buffer, "%s-%s-%s%d.%d", arch, oem, os, |
| 770 | get_w32_major_version (), get_w32_minor_version ()); |
| 771 | return configuration_buffer; |
| 772 | } |
| 773 | |
| 774 | #include <sys/timeb.h> |
| 775 | |
| 776 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ |
| 777 | void |
| 778 | gettimeofday (struct timeval *tv, struct timezone *tz) |
| 779 | { |
| 780 | struct _timeb tb; |
| 781 | _ftime (&tb); |
| 782 | |
| 783 | tv->tv_sec = tb.time; |
| 784 | tv->tv_usec = tb.millitm * 1000L; |
| 785 | if (tz) |
| 786 | { |
| 787 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ |
| 788 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /* ------------------------------------------------------------------------- */ |
| 793 | /* IO support and wrapper functions for W32 API. */ |
| 794 | /* ------------------------------------------------------------------------- */ |
| 795 | |
| 796 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
| 797 | on network directories, so we handle that case here. |
| 798 | (Ulrich Leodolter, 1/11/95). */ |
| 799 | char * |
| 800 | sys_ctime (const time_t *t) |
| 801 | { |
| 802 | char *str = (char *) ctime (t); |
| 803 | return (str ? str : "Sun Jan 01 00:00:00 1970"); |
| 804 | } |
| 805 | |
| 806 | /* Emulate sleep...we could have done this with a define, but that |
| 807 | would necessitate including windows.h in the files that used it. |
| 808 | This is much easier. */ |
| 809 | void |
| 810 | sys_sleep (int seconds) |
| 811 | { |
| 812 | Sleep (seconds * 1000); |
| 813 | } |
| 814 | |
| 815 | /* Internal MSVC functions for low-level descriptor munging */ |
| 816 | extern int __cdecl _set_osfhnd (int fd, long h); |
| 817 | extern int __cdecl _free_osfhnd (int fd); |
| 818 | |
| 819 | /* parallel array of private info on file handles */ |
| 820 | filedesc fd_info [ MAXDESC ]; |
| 821 | |
| 822 | typedef struct volume_info_data { |
| 823 | struct volume_info_data * next; |
| 824 | |
| 825 | /* time when info was obtained */ |
| 826 | DWORD timestamp; |
| 827 | |
| 828 | /* actual volume info */ |
| 829 | char * root_dir; |
| 830 | DWORD serialnum; |
| 831 | DWORD maxcomp; |
| 832 | DWORD flags; |
| 833 | char * name; |
| 834 | char * type; |
| 835 | } volume_info_data; |
| 836 | |
| 837 | /* Global referenced by various functions. */ |
| 838 | static volume_info_data volume_info; |
| 839 | |
| 840 | /* Vector to indicate which drives are local and fixed (for which cached |
| 841 | data never expires). */ |
| 842 | static BOOL fixed_drives[26]; |
| 843 | |
| 844 | /* Consider cached volume information to be stale if older than 10s, |
| 845 | at least for non-local drives. Info for fixed drives is never stale. */ |
| 846 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) |
| 847 | #define VOLINFO_STILL_VALID( root_dir, info ) \ |
| 848 | ( ( isalpha (root_dir[0]) && \ |
| 849 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ |
| 850 | || GetTickCount () - info->timestamp < 10000 ) |
| 851 | |
| 852 | /* Cache support functions. */ |
| 853 | |
| 854 | /* Simple linked list with linear search is sufficient. */ |
| 855 | static volume_info_data *volume_cache = NULL; |
| 856 | |
| 857 | static volume_info_data * |
| 858 | lookup_volume_info (char * root_dir) |
| 859 | { |
| 860 | volume_info_data * info; |
| 861 | |
| 862 | for (info = volume_cache; info; info = info->next) |
| 863 | if (stricmp (info->root_dir, root_dir) == 0) |
| 864 | break; |
| 865 | return info; |
| 866 | } |
| 867 | |
| 868 | static void |
| 869 | add_volume_info (char * root_dir, volume_info_data * info) |
| 870 | { |
| 871 | info->root_dir = strdup (root_dir); |
| 872 | info->next = volume_cache; |
| 873 | volume_cache = info; |
| 874 | } |
| 875 | |
| 876 | |
| 877 | /* Wrapper for GetVolumeInformation, which uses caching to avoid |
| 878 | performance penalty (~2ms on 486 for local drives, 7.5ms for local |
| 879 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ |
| 880 | volume_info_data * |
| 881 | GetCachedVolumeInformation (char * root_dir) |
| 882 | { |
| 883 | volume_info_data * info; |
| 884 | char default_root[ MAX_PATH ]; |
| 885 | |
| 886 | /* NULL for root_dir means use root from current directory. */ |
| 887 | if (root_dir == NULL) |
| 888 | { |
| 889 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) |
| 890 | return NULL; |
| 891 | parse_root (default_root, &root_dir); |
| 892 | *root_dir = 0; |
| 893 | root_dir = default_root; |
| 894 | } |
| 895 | |
| 896 | /* Local fixed drives can be cached permanently. Removable drives |
| 897 | cannot be cached permanently, since the volume name and serial |
| 898 | number (if nothing else) can change. Remote drives should be |
| 899 | treated as if they are removable, since there is no sure way to |
| 900 | tell whether they are or not. Also, the UNC association of drive |
| 901 | letters mapped to remote volumes can be changed at any time (even |
| 902 | by other processes) without notice. |
| 903 | |
| 904 | As a compromise, so we can benefit from caching info for remote |
| 905 | volumes, we use a simple expiry mechanism to invalidate cache |
| 906 | entries that are more than ten seconds old. */ |
| 907 | |
| 908 | #if 0 |
| 909 | /* No point doing this, because WNetGetConnection is even slower than |
| 910 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, |
| 911 | GetDriveType is about the only call of this type which does not |
| 912 | involve network access, and so is extremely quick). */ |
| 913 | |
| 914 | /* Map drive letter to UNC if remote. */ |
| 915 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) |
| 916 | { |
| 917 | char remote_name[ 256 ]; |
| 918 | char drive[3] = { root_dir[0], ':' }; |
| 919 | |
| 920 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) |
| 921 | == NO_ERROR) |
| 922 | /* do something */ ; |
| 923 | } |
| 924 | #endif |
| 925 | |
| 926 | info = lookup_volume_info (root_dir); |
| 927 | |
| 928 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) |
| 929 | { |
| 930 | char name[ 256 ]; |
| 931 | DWORD serialnum; |
| 932 | DWORD maxcomp; |
| 933 | DWORD flags; |
| 934 | char type[ 256 ]; |
| 935 | |
| 936 | /* Info is not cached, or is stale. */ |
| 937 | if (!GetVolumeInformation (root_dir, |
| 938 | name, sizeof (name), |
| 939 | &serialnum, |
| 940 | &maxcomp, |
| 941 | &flags, |
| 942 | type, sizeof (type))) |
| 943 | return NULL; |
| 944 | |
| 945 | /* Cache the volume information for future use, overwriting existing |
| 946 | entry if present. */ |
| 947 | if (info == NULL) |
| 948 | { |
| 949 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); |
| 950 | add_volume_info (root_dir, info); |
| 951 | } |
| 952 | else |
| 953 | { |
| 954 | free (info->name); |
| 955 | free (info->type); |
| 956 | } |
| 957 | |
| 958 | info->name = strdup (name); |
| 959 | info->serialnum = serialnum; |
| 960 | info->maxcomp = maxcomp; |
| 961 | info->flags = flags; |
| 962 | info->type = strdup (type); |
| 963 | info->timestamp = GetTickCount (); |
| 964 | } |
| 965 | |
| 966 | return info; |
| 967 | } |
| 968 | |
| 969 | /* Get information on the volume where name is held; set path pointer to |
| 970 | start of pathname in name (past UNC header\volume header if present). */ |
| 971 | int |
| 972 | get_volume_info (const char * name, const char ** pPath) |
| 973 | { |
| 974 | char temp[MAX_PATH]; |
| 975 | char *rootname = NULL; /* default to current volume */ |
| 976 | volume_info_data * info; |
| 977 | |
| 978 | if (name == NULL) |
| 979 | return FALSE; |
| 980 | |
| 981 | /* find the root name of the volume if given */ |
| 982 | if (isalpha (name[0]) && name[1] == ':') |
| 983 | { |
| 984 | rootname = temp; |
| 985 | temp[0] = *name++; |
| 986 | temp[1] = *name++; |
| 987 | temp[2] = '\\'; |
| 988 | temp[3] = 0; |
| 989 | } |
| 990 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 991 | { |
| 992 | char *str = temp; |
| 993 | int slashes = 4; |
| 994 | rootname = temp; |
| 995 | do |
| 996 | { |
| 997 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 998 | break; |
| 999 | *str++ = *name++; |
| 1000 | } |
| 1001 | while ( *name ); |
| 1002 | |
| 1003 | *str++ = '\\'; |
| 1004 | *str = 0; |
| 1005 | } |
| 1006 | |
| 1007 | if (pPath) |
| 1008 | *pPath = name; |
| 1009 | |
| 1010 | info = GetCachedVolumeInformation (rootname); |
| 1011 | if (info != NULL) |
| 1012 | { |
| 1013 | /* Set global referenced by other functions. */ |
| 1014 | volume_info = *info; |
| 1015 | return TRUE; |
| 1016 | } |
| 1017 | return FALSE; |
| 1018 | } |
| 1019 | |
| 1020 | /* Determine if volume is FAT format (ie. only supports short 8.3 |
| 1021 | names); also set path pointer to start of pathname in name. */ |
| 1022 | int |
| 1023 | is_fat_volume (const char * name, const char ** pPath) |
| 1024 | { |
| 1025 | if (get_volume_info (name, pPath)) |
| 1026 | return (volume_info.maxcomp == 12); |
| 1027 | return FALSE; |
| 1028 | } |
| 1029 | |
| 1030 | /* Map filename to a legal 8.3 name if necessary. */ |
| 1031 | const char * |
| 1032 | map_w32_filename (const char * name, const char ** pPath) |
| 1033 | { |
| 1034 | static char shortname[MAX_PATH]; |
| 1035 | char * str = shortname; |
| 1036 | char c; |
| 1037 | char * path; |
| 1038 | const char * save_name = name; |
| 1039 | |
| 1040 | if (is_fat_volume (name, &path)) /* truncate to 8.3 */ |
| 1041 | { |
| 1042 | register int left = 8; /* maximum number of chars in part */ |
| 1043 | register int extn = 0; /* extension added? */ |
| 1044 | register int dots = 2; /* maximum number of dots allowed */ |
| 1045 | |
| 1046 | while (name < path) |
| 1047 | *str++ = *name++; /* skip past UNC header */ |
| 1048 | |
| 1049 | while ((c = *name++)) |
| 1050 | { |
| 1051 | switch ( c ) |
| 1052 | { |
| 1053 | case '\\': |
| 1054 | case '/': |
| 1055 | *str++ = '\\'; |
| 1056 | extn = 0; /* reset extension flags */ |
| 1057 | dots = 2; /* max 2 dots */ |
| 1058 | left = 8; /* max length 8 for main part */ |
| 1059 | break; |
| 1060 | case ':': |
| 1061 | *str++ = ':'; |
| 1062 | extn = 0; /* reset extension flags */ |
| 1063 | dots = 2; /* max 2 dots */ |
| 1064 | left = 8; /* max length 8 for main part */ |
| 1065 | break; |
| 1066 | case '.': |
| 1067 | if ( dots ) |
| 1068 | { |
| 1069 | /* Convert path components of the form .xxx to _xxx, |
| 1070 | but leave . and .. as they are. This allows .emacs |
| 1071 | to be read as _emacs, for example. */ |
| 1072 | |
| 1073 | if (! *name || |
| 1074 | *name == '.' || |
| 1075 | IS_DIRECTORY_SEP (*name)) |
| 1076 | { |
| 1077 | *str++ = '.'; |
| 1078 | dots--; |
| 1079 | } |
| 1080 | else |
| 1081 | { |
| 1082 | *str++ = '_'; |
| 1083 | left--; |
| 1084 | dots = 0; |
| 1085 | } |
| 1086 | } |
| 1087 | else if ( !extn ) |
| 1088 | { |
| 1089 | *str++ = '.'; |
| 1090 | extn = 1; /* we've got an extension */ |
| 1091 | left = 3; /* 3 chars in extension */ |
| 1092 | } |
| 1093 | else |
| 1094 | { |
| 1095 | /* any embedded dots after the first are converted to _ */ |
| 1096 | *str++ = '_'; |
| 1097 | } |
| 1098 | break; |
| 1099 | case '~': |
| 1100 | case '#': /* don't lose these, they're important */ |
| 1101 | if ( ! left ) |
| 1102 | str[-1] = c; /* replace last character of part */ |
| 1103 | /* FALLTHRU */ |
| 1104 | default: |
| 1105 | if ( left ) |
| 1106 | { |
| 1107 | *str++ = tolower (c); /* map to lower case (looks nicer) */ |
| 1108 | left--; |
| 1109 | dots = 0; /* started a path component */ |
| 1110 | } |
| 1111 | break; |
| 1112 | } |
| 1113 | } |
| 1114 | *str = '\0'; |
| 1115 | } |
| 1116 | else |
| 1117 | { |
| 1118 | strcpy (shortname, name); |
| 1119 | unixtodos_filename (shortname); |
| 1120 | } |
| 1121 | |
| 1122 | if (pPath) |
| 1123 | *pPath = shortname + (path - save_name); |
| 1124 | |
| 1125 | return shortname; |
| 1126 | } |
| 1127 | |
| 1128 | /* Emulate the Unix directory procedures opendir, closedir, |
| 1129 | and readdir. We can't use the procedures supplied in sysdep.c, |
| 1130 | so we provide them here. */ |
| 1131 | |
| 1132 | struct direct dir_static; /* simulated directory contents */ |
| 1133 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; |
| 1134 | static int dir_is_fat; |
| 1135 | static char dir_pathname[MAXPATHLEN+1]; |
| 1136 | static WIN32_FIND_DATA dir_find_data; |
| 1137 | |
| 1138 | DIR * |
| 1139 | opendir (char *filename) |
| 1140 | { |
| 1141 | DIR *dirp; |
| 1142 | |
| 1143 | /* Opening is done by FindFirstFile. However, a read is inherent to |
| 1144 | this operation, so we defer the open until read time. */ |
| 1145 | |
| 1146 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) |
| 1147 | return NULL; |
| 1148 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1149 | return NULL; |
| 1150 | |
| 1151 | dirp->dd_fd = 0; |
| 1152 | dirp->dd_loc = 0; |
| 1153 | dirp->dd_size = 0; |
| 1154 | |
| 1155 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); |
| 1156 | dir_pathname[MAXPATHLEN] = '\0'; |
| 1157 | dir_is_fat = is_fat_volume (filename, NULL); |
| 1158 | |
| 1159 | return dirp; |
| 1160 | } |
| 1161 | |
| 1162 | void |
| 1163 | closedir (DIR *dirp) |
| 1164 | { |
| 1165 | /* If we have a find-handle open, close it. */ |
| 1166 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1167 | { |
| 1168 | FindClose (dir_find_handle); |
| 1169 | dir_find_handle = INVALID_HANDLE_VALUE; |
| 1170 | } |
| 1171 | xfree ((char *) dirp); |
| 1172 | } |
| 1173 | |
| 1174 | struct direct * |
| 1175 | readdir (DIR *dirp) |
| 1176 | { |
| 1177 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
| 1178 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1179 | { |
| 1180 | char filename[MAXNAMLEN + 3]; |
| 1181 | int ln; |
| 1182 | |
| 1183 | strcpy (filename, dir_pathname); |
| 1184 | ln = strlen (filename) - 1; |
| 1185 | if (!IS_DIRECTORY_SEP (filename[ln])) |
| 1186 | strcat (filename, "\\"); |
| 1187 | strcat (filename, "*"); |
| 1188 | |
| 1189 | dir_find_handle = FindFirstFile (filename, &dir_find_data); |
| 1190 | |
| 1191 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1192 | return NULL; |
| 1193 | } |
| 1194 | else |
| 1195 | { |
| 1196 | if (!FindNextFile (dir_find_handle, &dir_find_data)) |
| 1197 | return NULL; |
| 1198 | } |
| 1199 | |
| 1200 | /* Emacs never uses this value, so don't bother making it match |
| 1201 | value returned by stat(). */ |
| 1202 | dir_static.d_ino = 1; |
| 1203 | |
| 1204 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + |
| 1205 | dir_static.d_namlen - dir_static.d_namlen % 4; |
| 1206 | |
| 1207 | dir_static.d_namlen = strlen (dir_find_data.cFileName); |
| 1208 | strcpy (dir_static.d_name, dir_find_data.cFileName); |
| 1209 | if (dir_is_fat) |
| 1210 | _strlwr (dir_static.d_name); |
| 1211 | else if (!NILP (Vw32_downcase_file_names)) |
| 1212 | { |
| 1213 | register char *p; |
| 1214 | for (p = dir_static.d_name; *p; p++) |
| 1215 | if (*p >= 'a' && *p <= 'z') |
| 1216 | break; |
| 1217 | if (!*p) |
| 1218 | _strlwr (dir_static.d_name); |
| 1219 | } |
| 1220 | |
| 1221 | return &dir_static; |
| 1222 | } |
| 1223 | |
| 1224 | |
| 1225 | /* Shadow some MSVC runtime functions to map requests for long filenames |
| 1226 | to reasonable short names if necessary. This was originally added to |
| 1227 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support |
| 1228 | long file names. */ |
| 1229 | |
| 1230 | int |
| 1231 | sys_access (const char * path, int mode) |
| 1232 | { |
| 1233 | return _access (map_w32_filename (path, NULL), mode); |
| 1234 | } |
| 1235 | |
| 1236 | int |
| 1237 | sys_chdir (const char * path) |
| 1238 | { |
| 1239 | return _chdir (map_w32_filename (path, NULL)); |
| 1240 | } |
| 1241 | |
| 1242 | int |
| 1243 | sys_chmod (const char * path, int mode) |
| 1244 | { |
| 1245 | return _chmod (map_w32_filename (path, NULL), mode); |
| 1246 | } |
| 1247 | |
| 1248 | int |
| 1249 | sys_creat (const char * path, int mode) |
| 1250 | { |
| 1251 | return _creat (map_w32_filename (path, NULL), mode); |
| 1252 | } |
| 1253 | |
| 1254 | FILE * |
| 1255 | sys_fopen(const char * path, const char * mode) |
| 1256 | { |
| 1257 | int fd; |
| 1258 | int oflag; |
| 1259 | const char * mode_save = mode; |
| 1260 | |
| 1261 | /* Force all file handles to be non-inheritable. This is necessary to |
| 1262 | ensure child processes don't unwittingly inherit handles that might |
| 1263 | prevent future file access. */ |
| 1264 | |
| 1265 | if (mode[0] == 'r') |
| 1266 | oflag = O_RDONLY; |
| 1267 | else if (mode[0] == 'w' || mode[0] == 'a') |
| 1268 | oflag = O_WRONLY | O_CREAT | O_TRUNC; |
| 1269 | else |
| 1270 | return NULL; |
| 1271 | |
| 1272 | /* Only do simplistic option parsing. */ |
| 1273 | while (*++mode) |
| 1274 | if (mode[0] == '+') |
| 1275 | { |
| 1276 | oflag &= ~(O_RDONLY | O_WRONLY); |
| 1277 | oflag |= O_RDWR; |
| 1278 | } |
| 1279 | else if (mode[0] == 'b') |
| 1280 | { |
| 1281 | oflag &= ~O_TEXT; |
| 1282 | oflag |= O_BINARY; |
| 1283 | } |
| 1284 | else if (mode[0] == 't') |
| 1285 | { |
| 1286 | oflag &= ~O_BINARY; |
| 1287 | oflag |= O_TEXT; |
| 1288 | } |
| 1289 | else break; |
| 1290 | |
| 1291 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
| 1292 | if (fd < 0) |
| 1293 | return NULL; |
| 1294 | |
| 1295 | return _fdopen (fd, mode_save); |
| 1296 | } |
| 1297 | |
| 1298 | /* This only works on NTFS volumes, but is useful to have. */ |
| 1299 | int |
| 1300 | sys_link (const char * old, const char * new) |
| 1301 | { |
| 1302 | HANDLE fileh; |
| 1303 | int result = -1; |
| 1304 | char oldname[MAX_PATH], newname[MAX_PATH]; |
| 1305 | |
| 1306 | if (old == NULL || new == NULL) |
| 1307 | { |
| 1308 | errno = ENOENT; |
| 1309 | return -1; |
| 1310 | } |
| 1311 | |
| 1312 | strcpy (oldname, map_w32_filename (old, NULL)); |
| 1313 | strcpy (newname, map_w32_filename (new, NULL)); |
| 1314 | |
| 1315 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, |
| 1316 | FILE_FLAG_BACKUP_SEMANTICS, NULL); |
| 1317 | if (fileh != INVALID_HANDLE_VALUE) |
| 1318 | { |
| 1319 | int wlen; |
| 1320 | |
| 1321 | /* Confusingly, the "alternate" stream name field does not apply |
| 1322 | when restoring a hard link, and instead contains the actual |
| 1323 | stream data for the link (ie. the name of the link to create). |
| 1324 | The WIN32_STREAM_ID structure before the cStreamName field is |
| 1325 | the stream header, which is then immediately followed by the |
| 1326 | stream data. */ |
| 1327 | |
| 1328 | struct { |
| 1329 | WIN32_STREAM_ID wid; |
| 1330 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ |
| 1331 | } data; |
| 1332 | |
| 1333 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, |
| 1334 | data.wid.cStreamName, MAX_PATH); |
| 1335 | if (wlen > 0) |
| 1336 | { |
| 1337 | LPVOID context = NULL; |
| 1338 | DWORD wbytes = 0; |
| 1339 | |
| 1340 | data.wid.dwStreamId = BACKUP_LINK; |
| 1341 | data.wid.dwStreamAttributes = 0; |
| 1342 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); |
| 1343 | data.wid.Size.HighPart = 0; |
| 1344 | data.wid.dwStreamNameSize = 0; |
| 1345 | |
| 1346 | if (BackupWrite (fileh, (LPBYTE)&data, |
| 1347 | offsetof (WIN32_STREAM_ID, cStreamName) |
| 1348 | + data.wid.Size.LowPart, |
| 1349 | &wbytes, FALSE, FALSE, &context) |
| 1350 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) |
| 1351 | { |
| 1352 | /* succeeded */ |
| 1353 | result = 0; |
| 1354 | } |
| 1355 | else |
| 1356 | { |
| 1357 | /* Should try mapping GetLastError to errno; for now just |
| 1358 | indicate a general error (eg. links not supported). */ |
| 1359 | errno = EINVAL; // perhaps EMLINK? |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | CloseHandle (fileh); |
| 1364 | } |
| 1365 | else |
| 1366 | errno = ENOENT; |
| 1367 | |
| 1368 | return result; |
| 1369 | } |
| 1370 | |
| 1371 | int |
| 1372 | sys_mkdir (const char * path) |
| 1373 | { |
| 1374 | return _mkdir (map_w32_filename (path, NULL)); |
| 1375 | } |
| 1376 | |
| 1377 | /* Because of long name mapping issues, we need to implement this |
| 1378 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate |
| 1379 | a unique name, instead of setting the input template to an empty |
| 1380 | string. |
| 1381 | |
| 1382 | Standard algorithm seems to be use pid or tid with a letter on the |
| 1383 | front (in place of the 6 X's) and cycle through the letters to find a |
| 1384 | unique name. We extend that to allow any reasonable character as the |
| 1385 | first of the 6 X's. */ |
| 1386 | char * |
| 1387 | sys_mktemp (char * template) |
| 1388 | { |
| 1389 | char * p; |
| 1390 | int i; |
| 1391 | unsigned uid = GetCurrentThreadId (); |
| 1392 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; |
| 1393 | |
| 1394 | if (template == NULL) |
| 1395 | return NULL; |
| 1396 | p = template + strlen (template); |
| 1397 | i = 5; |
| 1398 | /* replace up to the last 5 X's with uid in decimal */ |
| 1399 | while (--p >= template && p[0] == 'X' && --i >= 0) |
| 1400 | { |
| 1401 | p[0] = '0' + uid % 10; |
| 1402 | uid /= 10; |
| 1403 | } |
| 1404 | |
| 1405 | if (i < 0 && p[0] == 'X') |
| 1406 | { |
| 1407 | i = 0; |
| 1408 | do |
| 1409 | { |
| 1410 | int save_errno = errno; |
| 1411 | p[0] = first_char[i]; |
| 1412 | if (sys_access (template, 0) < 0) |
| 1413 | { |
| 1414 | errno = save_errno; |
| 1415 | return template; |
| 1416 | } |
| 1417 | } |
| 1418 | while (++i < sizeof (first_char)); |
| 1419 | } |
| 1420 | |
| 1421 | /* Template is badly formed or else we can't generate a unique name, |
| 1422 | so return empty string */ |
| 1423 | template[0] = 0; |
| 1424 | return template; |
| 1425 | } |
| 1426 | |
| 1427 | int |
| 1428 | sys_open (const char * path, int oflag, int mode) |
| 1429 | { |
| 1430 | /* Force all file handles to be non-inheritable. */ |
| 1431 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
| 1432 | } |
| 1433 | |
| 1434 | int |
| 1435 | sys_rename (const char * oldname, const char * newname) |
| 1436 | { |
| 1437 | char temp[MAX_PATH]; |
| 1438 | DWORD attr; |
| 1439 | |
| 1440 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
| 1441 | alias in a number of circumstances (it is not easy to predict when |
| 1442 | just by looking at oldname and newname, unfortunately). In these |
| 1443 | cases, renaming through a temporary name avoids the problem. |
| 1444 | |
| 1445 | A second problem on Windows 95 is that renaming through a temp name when |
| 1446 | newname is uppercase fails (the final long name ends up in |
| 1447 | lowercase, although the short alias might be uppercase) UNLESS the |
| 1448 | long temp name is not 8.3. |
| 1449 | |
| 1450 | So, on Windows 95 we always rename through a temp name, and we make sure |
| 1451 | the temp name has a long extension to ensure correct renaming. */ |
| 1452 | |
| 1453 | strcpy (temp, map_w32_filename (oldname, NULL)); |
| 1454 | |
| 1455 | if (os_subtype == OS_WIN95) |
| 1456 | { |
| 1457 | char * p; |
| 1458 | |
| 1459 | if (p = strrchr (temp, '\\')) |
| 1460 | p++; |
| 1461 | else |
| 1462 | p = temp; |
| 1463 | /* Force temp name to require a manufactured 8.3 alias - this |
| 1464 | seems to make the second rename work properly. */ |
| 1465 | strcpy (p, "_rename_temp.XXXXXX"); |
| 1466 | sys_mktemp (temp); |
| 1467 | if (rename (map_w32_filename (oldname, NULL), temp) < 0) |
| 1468 | return -1; |
| 1469 | } |
| 1470 | |
| 1471 | /* Emulate Unix behaviour - newname is deleted if it already exists |
| 1472 | (at least if it is a file; don't do this for directories). |
| 1473 | However, don't do this if we are just changing the case of the file |
| 1474 | name - we will end up deleting the file we are trying to rename! */ |
| 1475 | newname = map_w32_filename (newname, NULL); |
| 1476 | |
| 1477 | /* TODO: Use GetInformationByHandle (on NT) to ensure newname and temp |
| 1478 | do not refer to the same file, eg. through share aliases. */ |
| 1479 | if (stricmp (newname, temp) != 0 |
| 1480 | && (attr = GetFileAttributes (newname)) != -1 |
| 1481 | && (attr & FILE_ATTRIBUTE_DIRECTORY) == 0) |
| 1482 | { |
| 1483 | _chmod (newname, 0666); |
| 1484 | _unlink (newname); |
| 1485 | } |
| 1486 | |
| 1487 | return rename (temp, newname); |
| 1488 | } |
| 1489 | |
| 1490 | int |
| 1491 | sys_rmdir (const char * path) |
| 1492 | { |
| 1493 | return _rmdir (map_w32_filename (path, NULL)); |
| 1494 | } |
| 1495 | |
| 1496 | int |
| 1497 | sys_unlink (const char * path) |
| 1498 | { |
| 1499 | return _unlink (map_w32_filename (path, NULL)); |
| 1500 | } |
| 1501 | |
| 1502 | static FILETIME utc_base_ft; |
| 1503 | static long double utc_base; |
| 1504 | static int init = 0; |
| 1505 | |
| 1506 | static time_t |
| 1507 | convert_time (FILETIME ft) |
| 1508 | { |
| 1509 | long double ret; |
| 1510 | |
| 1511 | if (!init) |
| 1512 | { |
| 1513 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1514 | SYSTEMTIME st; |
| 1515 | |
| 1516 | st.wYear = 1970; |
| 1517 | st.wMonth = 1; |
| 1518 | st.wDay = 1; |
| 1519 | st.wHour = 0; |
| 1520 | st.wMinute = 0; |
| 1521 | st.wSecond = 0; |
| 1522 | st.wMilliseconds = 0; |
| 1523 | |
| 1524 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1525 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1526 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1527 | init = 1; |
| 1528 | } |
| 1529 | |
| 1530 | if (CompareFileTime (&ft, &utc_base_ft) < 0) |
| 1531 | return 0; |
| 1532 | |
| 1533 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; |
| 1534 | ret -= utc_base; |
| 1535 | return (time_t) (ret * 1e-7); |
| 1536 | } |
| 1537 | |
| 1538 | #if 0 |
| 1539 | /* in case we ever have need of this */ |
| 1540 | void |
| 1541 | convert_from_time_t (time_t time, FILETIME * pft) |
| 1542 | { |
| 1543 | long double tmp; |
| 1544 | |
| 1545 | if (!init) |
| 1546 | { |
| 1547 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1548 | SYSTEMTIME st; |
| 1549 | |
| 1550 | st.wYear = 1970; |
| 1551 | st.wMonth = 1; |
| 1552 | st.wDay = 1; |
| 1553 | st.wHour = 0; |
| 1554 | st.wMinute = 0; |
| 1555 | st.wSecond = 0; |
| 1556 | st.wMilliseconds = 0; |
| 1557 | |
| 1558 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1559 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1560 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1561 | init = 1; |
| 1562 | } |
| 1563 | |
| 1564 | /* time in 100ns units since 1-Jan-1601 */ |
| 1565 | tmp = (long double) time * 1e7 + utc_base; |
| 1566 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); |
| 1567 | pft->dwLowDateTime = (DWORD) (tmp - pft->dwHighDateTime); |
| 1568 | } |
| 1569 | #endif |
| 1570 | |
| 1571 | #if 0 |
| 1572 | /* No reason to keep this; faking inode values either by hashing or even |
| 1573 | using the file index from GetInformationByHandle, is not perfect and |
| 1574 | so by default Emacs doesn't use the inode values on Windows. |
| 1575 | Instead, we now determine file-truename correctly (except for |
| 1576 | possible drive aliasing etc). */ |
| 1577 | |
| 1578 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ |
| 1579 | static unsigned |
| 1580 | hashval (const unsigned char * str) |
| 1581 | { |
| 1582 | unsigned h = 0; |
| 1583 | while (*str) |
| 1584 | { |
| 1585 | h = (h << 4) + *str++; |
| 1586 | h ^= (h >> 28); |
| 1587 | } |
| 1588 | return h; |
| 1589 | } |
| 1590 | |
| 1591 | /* Return the hash value of the canonical pathname, excluding the |
| 1592 | drive/UNC header, to get a hopefully unique inode number. */ |
| 1593 | static DWORD |
| 1594 | generate_inode_val (const char * name) |
| 1595 | { |
| 1596 | char fullname[ MAX_PATH ]; |
| 1597 | char * p; |
| 1598 | unsigned hash; |
| 1599 | |
| 1600 | /* Get the truly canonical filename, if it exists. (Note: this |
| 1601 | doesn't resolve aliasing due to subst commands, or recognise hard |
| 1602 | links. */ |
| 1603 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) |
| 1604 | abort (); |
| 1605 | |
| 1606 | parse_root (fullname, &p); |
| 1607 | /* Normal W32 filesystems are still case insensitive. */ |
| 1608 | _strlwr (p); |
| 1609 | return hashval (p); |
| 1610 | } |
| 1611 | |
| 1612 | #endif |
| 1613 | |
| 1614 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
| 1615 | replace it with our own. This also allows us to calculate consistent |
| 1616 | inode values without hacks in the main Emacs code. */ |
| 1617 | int |
| 1618 | stat (const char * path, struct stat * buf) |
| 1619 | { |
| 1620 | char * name; |
| 1621 | WIN32_FIND_DATA wfd; |
| 1622 | HANDLE fh; |
| 1623 | DWORD fake_inode; |
| 1624 | int permission; |
| 1625 | int len; |
| 1626 | int rootdir = FALSE; |
| 1627 | |
| 1628 | if (path == NULL || buf == NULL) |
| 1629 | { |
| 1630 | errno = EFAULT; |
| 1631 | return -1; |
| 1632 | } |
| 1633 | |
| 1634 | name = (char *) map_w32_filename (path, &path); |
| 1635 | /* must be valid filename, no wild cards */ |
| 1636 | if (strchr (name, '*') || strchr (name, '?')) |
| 1637 | { |
| 1638 | errno = ENOENT; |
| 1639 | return -1; |
| 1640 | } |
| 1641 | |
| 1642 | /* Remove trailing directory separator, unless name is the root |
| 1643 | directory of a drive or UNC volume in which case ensure there |
| 1644 | is a trailing separator. */ |
| 1645 | len = strlen (name); |
| 1646 | rootdir = (path >= name + len - 1 |
| 1647 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); |
| 1648 | name = strcpy (alloca (len + 2), name); |
| 1649 | |
| 1650 | if (rootdir) |
| 1651 | { |
| 1652 | if (!IS_DIRECTORY_SEP (name[len-1])) |
| 1653 | strcat (name, "\\"); |
| 1654 | if (GetDriveType (name) < 2) |
| 1655 | { |
| 1656 | errno = ENOENT; |
| 1657 | return -1; |
| 1658 | } |
| 1659 | memset (&wfd, 0, sizeof (wfd)); |
| 1660 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; |
| 1661 | wfd.ftCreationTime = utc_base_ft; |
| 1662 | wfd.ftLastAccessTime = utc_base_ft; |
| 1663 | wfd.ftLastWriteTime = utc_base_ft; |
| 1664 | strcpy (wfd.cFileName, name); |
| 1665 | } |
| 1666 | else |
| 1667 | { |
| 1668 | if (IS_DIRECTORY_SEP (name[len-1])) |
| 1669 | name[len - 1] = 0; |
| 1670 | |
| 1671 | /* (This is hacky, but helps when doing file completions on |
| 1672 | network drives.) Optimize by using information available from |
| 1673 | active readdir if possible. */ |
| 1674 | if (dir_find_handle != INVALID_HANDLE_VALUE |
| 1675 | && (len = strlen (dir_pathname)), |
| 1676 | strnicmp (name, dir_pathname, len) == 0 |
| 1677 | && IS_DIRECTORY_SEP (name[len]) |
| 1678 | && stricmp (name + len + 1, dir_static.d_name) == 0) |
| 1679 | { |
| 1680 | /* This was the last entry returned by readdir. */ |
| 1681 | wfd = dir_find_data; |
| 1682 | } |
| 1683 | else |
| 1684 | { |
| 1685 | fh = FindFirstFile (name, &wfd); |
| 1686 | if (fh == INVALID_HANDLE_VALUE) |
| 1687 | { |
| 1688 | errno = ENOENT; |
| 1689 | return -1; |
| 1690 | } |
| 1691 | FindClose (fh); |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 1696 | { |
| 1697 | buf->st_mode = _S_IFDIR; |
| 1698 | buf->st_nlink = 2; /* doesn't really matter */ |
| 1699 | fake_inode = 0; /* this doesn't either I think */ |
| 1700 | } |
| 1701 | else if (!NILP (Vw32_get_true_file_attributes)) |
| 1702 | { |
| 1703 | /* This is more accurate in terms of gettting the correct number |
| 1704 | of links, but is quite slow (it is noticable when Emacs is |
| 1705 | making a list of file name completions). */ |
| 1706 | BY_HANDLE_FILE_INFORMATION info; |
| 1707 | |
| 1708 | /* No access rights required to get info. */ |
| 1709 | fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL); |
| 1710 | |
| 1711 | if (GetFileInformationByHandle (fh, &info)) |
| 1712 | { |
| 1713 | switch (GetFileType (fh)) |
| 1714 | { |
| 1715 | case FILE_TYPE_DISK: |
| 1716 | buf->st_mode = _S_IFREG; |
| 1717 | break; |
| 1718 | case FILE_TYPE_PIPE: |
| 1719 | buf->st_mode = _S_IFIFO; |
| 1720 | break; |
| 1721 | case FILE_TYPE_CHAR: |
| 1722 | case FILE_TYPE_UNKNOWN: |
| 1723 | default: |
| 1724 | buf->st_mode = _S_IFCHR; |
| 1725 | } |
| 1726 | buf->st_nlink = info.nNumberOfLinks; |
| 1727 | /* Might as well use file index to fake inode values, but this |
| 1728 | is not guaranteed to be unique unless we keep a handle open |
| 1729 | all the time (even then there are situations where it is |
| 1730 | not unique). Reputedly, there are at most 48 bits of info |
| 1731 | (on NTFS, presumably less on FAT). */ |
| 1732 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; |
| 1733 | CloseHandle (fh); |
| 1734 | } |
| 1735 | else |
| 1736 | { |
| 1737 | errno = EACCES; |
| 1738 | return -1; |
| 1739 | } |
| 1740 | } |
| 1741 | else |
| 1742 | { |
| 1743 | /* Don't bother to make this information more accurate. */ |
| 1744 | buf->st_mode = _S_IFREG; |
| 1745 | buf->st_nlink = 1; |
| 1746 | fake_inode = 0; |
| 1747 | } |
| 1748 | |
| 1749 | #if 0 |
| 1750 | /* Not sure if there is any point in this. */ |
| 1751 | if (!NILP (Vw32_generate_fake_inodes)) |
| 1752 | fake_inode = generate_inode_val (name); |
| 1753 | else if (fake_inode == 0) |
| 1754 | { |
| 1755 | /* For want of something better, try to make everything unique. */ |
| 1756 | static DWORD gen_num = 0; |
| 1757 | fake_inode = ++gen_num; |
| 1758 | } |
| 1759 | #endif |
| 1760 | |
| 1761 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 1762 | if (sizeof (buf->st_ino) == 2) |
| 1763 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 1764 | else |
| 1765 | buf->st_ino = fake_inode; |
| 1766 | |
| 1767 | /* consider files to belong to current user */ |
| 1768 | buf->st_uid = the_passwd.pw_uid; |
| 1769 | buf->st_gid = the_passwd.pw_gid; |
| 1770 | |
| 1771 | /* volume_info is set indirectly by map_w32_filename */ |
| 1772 | buf->st_dev = volume_info.serialnum; |
| 1773 | buf->st_rdev = volume_info.serialnum; |
| 1774 | |
| 1775 | |
| 1776 | buf->st_size = wfd.nFileSizeLow; |
| 1777 | |
| 1778 | /* Convert timestamps to Unix format. */ |
| 1779 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); |
| 1780 | buf->st_atime = convert_time (wfd.ftLastAccessTime); |
| 1781 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 1782 | buf->st_ctime = convert_time (wfd.ftCreationTime); |
| 1783 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 1784 | |
| 1785 | /* determine rwx permissions */ |
| 1786 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 1787 | permission = _S_IREAD; |
| 1788 | else |
| 1789 | permission = _S_IREAD | _S_IWRITE; |
| 1790 | |
| 1791 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 1792 | permission |= _S_IEXEC; |
| 1793 | else |
| 1794 | { |
| 1795 | char * p = strrchr (name, '.'); |
| 1796 | if (p != NULL |
| 1797 | && (stricmp (p, ".exe") == 0 || |
| 1798 | stricmp (p, ".com") == 0 || |
| 1799 | stricmp (p, ".bat") == 0 || |
| 1800 | stricmp (p, ".cmd") == 0)) |
| 1801 | permission |= _S_IEXEC; |
| 1802 | } |
| 1803 | |
| 1804 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 1805 | |
| 1806 | return 0; |
| 1807 | } |
| 1808 | |
| 1809 | #ifdef HAVE_SOCKETS |
| 1810 | |
| 1811 | /* Wrappers for winsock functions to map between our file descriptors |
| 1812 | and winsock's handles; also set h_errno for convenience. |
| 1813 | |
| 1814 | To allow Emacs to run on systems which don't have winsock support |
| 1815 | installed, we dynamically link to winsock on startup if present, and |
| 1816 | otherwise provide the minimum necessary functionality |
| 1817 | (eg. gethostname). */ |
| 1818 | |
| 1819 | /* function pointers for relevant socket functions */ |
| 1820 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); |
| 1821 | void (PASCAL *pfn_WSASetLastError) (int iError); |
| 1822 | int (PASCAL *pfn_WSAGetLastError) (void); |
| 1823 | int (PASCAL *pfn_socket) (int af, int type, int protocol); |
| 1824 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 1825 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 1826 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); |
| 1827 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); |
| 1828 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); |
| 1829 | int (PASCAL *pfn_closesocket) (SOCKET s); |
| 1830 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); |
| 1831 | int (PASCAL *pfn_WSACleanup) (void); |
| 1832 | |
| 1833 | u_short (PASCAL *pfn_htons) (u_short hostshort); |
| 1834 | u_short (PASCAL *pfn_ntohs) (u_short netshort); |
| 1835 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); |
| 1836 | int (PASCAL *pfn_gethostname) (char * name, int namelen); |
| 1837 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); |
| 1838 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); |
| 1839 | |
| 1840 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
| 1841 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); |
| 1842 | #ifndef HANDLE_FLAG_INHERIT |
| 1843 | #define HANDLE_FLAG_INHERIT 1 |
| 1844 | #endif |
| 1845 | |
| 1846 | HANDLE winsock_lib; |
| 1847 | static int winsock_inuse; |
| 1848 | |
| 1849 | BOOL |
| 1850 | term_winsock (void) |
| 1851 | { |
| 1852 | if (winsock_lib != NULL && winsock_inuse == 0) |
| 1853 | { |
| 1854 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
| 1855 | after WSAStartup returns successfully, but it seems reasonable |
| 1856 | to allow unloading winsock anyway in that case. */ |
| 1857 | if (pfn_WSACleanup () == 0 || |
| 1858 | pfn_WSAGetLastError () == WSAENETDOWN) |
| 1859 | { |
| 1860 | if (FreeLibrary (winsock_lib)) |
| 1861 | winsock_lib = NULL; |
| 1862 | return TRUE; |
| 1863 | } |
| 1864 | } |
| 1865 | return FALSE; |
| 1866 | } |
| 1867 | |
| 1868 | BOOL |
| 1869 | init_winsock (int load_now) |
| 1870 | { |
| 1871 | WSADATA winsockData; |
| 1872 | |
| 1873 | if (winsock_lib != NULL) |
| 1874 | return TRUE; |
| 1875 | |
| 1876 | pfn_SetHandleInformation = NULL; |
| 1877 | pfn_SetHandleInformation |
| 1878 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 1879 | "SetHandleInformation"); |
| 1880 | |
| 1881 | winsock_lib = LoadLibrary ("wsock32.dll"); |
| 1882 | |
| 1883 | if (winsock_lib != NULL) |
| 1884 | { |
| 1885 | /* dynamically link to socket functions */ |
| 1886 | |
| 1887 | #define LOAD_PROC(fn) \ |
| 1888 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ |
| 1889 | goto fail; |
| 1890 | |
| 1891 | LOAD_PROC( WSAStartup ); |
| 1892 | LOAD_PROC( WSASetLastError ); |
| 1893 | LOAD_PROC( WSAGetLastError ); |
| 1894 | LOAD_PROC( socket ); |
| 1895 | LOAD_PROC( bind ); |
| 1896 | LOAD_PROC( connect ); |
| 1897 | LOAD_PROC( ioctlsocket ); |
| 1898 | LOAD_PROC( recv ); |
| 1899 | LOAD_PROC( send ); |
| 1900 | LOAD_PROC( closesocket ); |
| 1901 | LOAD_PROC( shutdown ); |
| 1902 | LOAD_PROC( htons ); |
| 1903 | LOAD_PROC( ntohs ); |
| 1904 | LOAD_PROC( inet_addr ); |
| 1905 | LOAD_PROC( gethostname ); |
| 1906 | LOAD_PROC( gethostbyname ); |
| 1907 | LOAD_PROC( getservbyname ); |
| 1908 | LOAD_PROC( WSACleanup ); |
| 1909 | |
| 1910 | #undef LOAD_PROC |
| 1911 | |
| 1912 | /* specify version 1.1 of winsock */ |
| 1913 | if (pfn_WSAStartup (0x101, &winsockData) == 0) |
| 1914 | { |
| 1915 | if (winsockData.wVersion != 0x101) |
| 1916 | goto fail; |
| 1917 | |
| 1918 | if (!load_now) |
| 1919 | { |
| 1920 | /* Report that winsock exists and is usable, but leave |
| 1921 | socket functions disabled. I am assuming that calling |
| 1922 | WSAStartup does not require any network interaction, |
| 1923 | and in particular does not cause or require a dial-up |
| 1924 | connection to be established. */ |
| 1925 | |
| 1926 | pfn_WSACleanup (); |
| 1927 | FreeLibrary (winsock_lib); |
| 1928 | winsock_lib = NULL; |
| 1929 | } |
| 1930 | winsock_inuse = 0; |
| 1931 | return TRUE; |
| 1932 | } |
| 1933 | |
| 1934 | fail: |
| 1935 | FreeLibrary (winsock_lib); |
| 1936 | winsock_lib = NULL; |
| 1937 | } |
| 1938 | |
| 1939 | return FALSE; |
| 1940 | } |
| 1941 | |
| 1942 | |
| 1943 | int h_errno = 0; |
| 1944 | |
| 1945 | /* function to set h_errno for compatability; map winsock error codes to |
| 1946 | normal system codes where they overlap (non-overlapping definitions |
| 1947 | are already in <sys/socket.h> */ |
| 1948 | static void set_errno () |
| 1949 | { |
| 1950 | if (winsock_lib == NULL) |
| 1951 | h_errno = EINVAL; |
| 1952 | else |
| 1953 | h_errno = pfn_WSAGetLastError (); |
| 1954 | |
| 1955 | switch (h_errno) |
| 1956 | { |
| 1957 | case WSAEACCES: h_errno = EACCES; break; |
| 1958 | case WSAEBADF: h_errno = EBADF; break; |
| 1959 | case WSAEFAULT: h_errno = EFAULT; break; |
| 1960 | case WSAEINTR: h_errno = EINTR; break; |
| 1961 | case WSAEINVAL: h_errno = EINVAL; break; |
| 1962 | case WSAEMFILE: h_errno = EMFILE; break; |
| 1963 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; |
| 1964 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; |
| 1965 | } |
| 1966 | errno = h_errno; |
| 1967 | } |
| 1968 | |
| 1969 | static void check_errno () |
| 1970 | { |
| 1971 | if (h_errno == 0 && winsock_lib != NULL) |
| 1972 | pfn_WSASetLastError (0); |
| 1973 | } |
| 1974 | |
| 1975 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
| 1976 | but I believe the method of keeping the socket handle separate (and |
| 1977 | insuring it is not inheritable) is the correct one. */ |
| 1978 | |
| 1979 | //#define SOCK_REPLACE_HANDLE |
| 1980 | |
| 1981 | #ifdef SOCK_REPLACE_HANDLE |
| 1982 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) |
| 1983 | #else |
| 1984 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) |
| 1985 | #endif |
| 1986 | |
| 1987 | int |
| 1988 | sys_socket(int af, int type, int protocol) |
| 1989 | { |
| 1990 | int fd; |
| 1991 | long s; |
| 1992 | child_process * cp; |
| 1993 | |
| 1994 | if (winsock_lib == NULL) |
| 1995 | { |
| 1996 | h_errno = ENETDOWN; |
| 1997 | return INVALID_SOCKET; |
| 1998 | } |
| 1999 | |
| 2000 | check_errno (); |
| 2001 | |
| 2002 | /* call the real socket function */ |
| 2003 | s = (long) pfn_socket (af, type, protocol); |
| 2004 | |
| 2005 | if (s != INVALID_SOCKET) |
| 2006 | { |
| 2007 | /* Although under NT 3.5 _open_osfhandle will accept a socket |
| 2008 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, |
| 2009 | that does not work under NT 3.1. However, we can get the same |
| 2010 | effect by using a backdoor function to replace an existing |
| 2011 | descriptor handle with the one we want. */ |
| 2012 | |
| 2013 | /* allocate a file descriptor (with appropriate flags) */ |
| 2014 | fd = _open ("NUL:", _O_RDWR); |
| 2015 | if (fd >= 0) |
| 2016 | { |
| 2017 | #ifdef SOCK_REPLACE_HANDLE |
| 2018 | /* now replace handle to NUL with our socket handle */ |
| 2019 | CloseHandle ((HANDLE) _get_osfhandle (fd)); |
| 2020 | _free_osfhnd (fd); |
| 2021 | _set_osfhnd (fd, s); |
| 2022 | /* setmode (fd, _O_BINARY); */ |
| 2023 | #else |
| 2024 | /* Make a non-inheritable copy of the socket handle. */ |
| 2025 | { |
| 2026 | HANDLE parent; |
| 2027 | HANDLE new_s = INVALID_HANDLE_VALUE; |
| 2028 | |
| 2029 | parent = GetCurrentProcess (); |
| 2030 | |
| 2031 | /* Apparently there is a bug in NT 3.51 with some service |
| 2032 | packs, which prevents using DuplicateHandle to make a |
| 2033 | socket handle non-inheritable (causes WSACleanup to |
| 2034 | hang). The work-around is to use SetHandleInformation |
| 2035 | instead if it is available and implemented. */ |
| 2036 | if (!pfn_SetHandleInformation |
| 2037 | || !pfn_SetHandleInformation ((HANDLE) s, |
| 2038 | HANDLE_FLAG_INHERIT, |
| 2039 | HANDLE_FLAG_INHERIT)) |
| 2040 | { |
| 2041 | DuplicateHandle (parent, |
| 2042 | (HANDLE) s, |
| 2043 | parent, |
| 2044 | &new_s, |
| 2045 | 0, |
| 2046 | FALSE, |
| 2047 | DUPLICATE_SAME_ACCESS); |
| 2048 | pfn_closesocket (s); |
| 2049 | s = (SOCKET) new_s; |
| 2050 | } |
| 2051 | fd_info[fd].hnd = (HANDLE) s; |
| 2052 | } |
| 2053 | #endif |
| 2054 | |
| 2055 | /* set our own internal flags */ |
| 2056 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; |
| 2057 | |
| 2058 | cp = new_child (); |
| 2059 | if (cp) |
| 2060 | { |
| 2061 | cp->fd = fd; |
| 2062 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 2063 | |
| 2064 | /* attach child_process to fd_info */ |
| 2065 | if (fd_info[ fd ].cp != NULL) |
| 2066 | { |
| 2067 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); |
| 2068 | abort (); |
| 2069 | } |
| 2070 | |
| 2071 | fd_info[ fd ].cp = cp; |
| 2072 | |
| 2073 | /* success! */ |
| 2074 | winsock_inuse++; /* count open sockets */ |
| 2075 | return fd; |
| 2076 | } |
| 2077 | |
| 2078 | /* clean up */ |
| 2079 | _close (fd); |
| 2080 | } |
| 2081 | pfn_closesocket (s); |
| 2082 | h_errno = EMFILE; |
| 2083 | } |
| 2084 | set_errno (); |
| 2085 | |
| 2086 | return -1; |
| 2087 | } |
| 2088 | |
| 2089 | |
| 2090 | int |
| 2091 | sys_bind (int s, const struct sockaddr * addr, int namelen) |
| 2092 | { |
| 2093 | if (winsock_lib == NULL) |
| 2094 | { |
| 2095 | h_errno = ENOTSOCK; |
| 2096 | return SOCKET_ERROR; |
| 2097 | } |
| 2098 | |
| 2099 | check_errno (); |
| 2100 | if (fd_info[s].flags & FILE_SOCKET) |
| 2101 | { |
| 2102 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); |
| 2103 | if (rc == SOCKET_ERROR) |
| 2104 | set_errno (); |
| 2105 | return rc; |
| 2106 | } |
| 2107 | h_errno = ENOTSOCK; |
| 2108 | return SOCKET_ERROR; |
| 2109 | } |
| 2110 | |
| 2111 | |
| 2112 | int |
| 2113 | sys_connect (int s, const struct sockaddr * name, int namelen) |
| 2114 | { |
| 2115 | if (winsock_lib == NULL) |
| 2116 | { |
| 2117 | h_errno = ENOTSOCK; |
| 2118 | return SOCKET_ERROR; |
| 2119 | } |
| 2120 | |
| 2121 | check_errno (); |
| 2122 | if (fd_info[s].flags & FILE_SOCKET) |
| 2123 | { |
| 2124 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); |
| 2125 | if (rc == SOCKET_ERROR) |
| 2126 | set_errno (); |
| 2127 | return rc; |
| 2128 | } |
| 2129 | h_errno = ENOTSOCK; |
| 2130 | return SOCKET_ERROR; |
| 2131 | } |
| 2132 | |
| 2133 | u_short |
| 2134 | sys_htons (u_short hostshort) |
| 2135 | { |
| 2136 | return (winsock_lib != NULL) ? |
| 2137 | pfn_htons (hostshort) : hostshort; |
| 2138 | } |
| 2139 | |
| 2140 | u_short |
| 2141 | sys_ntohs (u_short netshort) |
| 2142 | { |
| 2143 | return (winsock_lib != NULL) ? |
| 2144 | pfn_ntohs (netshort) : netshort; |
| 2145 | } |
| 2146 | |
| 2147 | unsigned long |
| 2148 | sys_inet_addr (const char * cp) |
| 2149 | { |
| 2150 | return (winsock_lib != NULL) ? |
| 2151 | pfn_inet_addr (cp) : INADDR_NONE; |
| 2152 | } |
| 2153 | |
| 2154 | int |
| 2155 | sys_gethostname (char * name, int namelen) |
| 2156 | { |
| 2157 | if (winsock_lib != NULL) |
| 2158 | return pfn_gethostname (name, namelen); |
| 2159 | |
| 2160 | if (namelen > MAX_COMPUTERNAME_LENGTH) |
| 2161 | return !GetComputerName (name, &namelen); |
| 2162 | |
| 2163 | h_errno = EFAULT; |
| 2164 | return SOCKET_ERROR; |
| 2165 | } |
| 2166 | |
| 2167 | struct hostent * |
| 2168 | sys_gethostbyname(const char * name) |
| 2169 | { |
| 2170 | struct hostent * host; |
| 2171 | |
| 2172 | if (winsock_lib == NULL) |
| 2173 | { |
| 2174 | h_errno = ENETDOWN; |
| 2175 | return NULL; |
| 2176 | } |
| 2177 | |
| 2178 | check_errno (); |
| 2179 | host = pfn_gethostbyname (name); |
| 2180 | if (!host) |
| 2181 | set_errno (); |
| 2182 | return host; |
| 2183 | } |
| 2184 | |
| 2185 | struct servent * |
| 2186 | sys_getservbyname(const char * name, const char * proto) |
| 2187 | { |
| 2188 | struct servent * serv; |
| 2189 | |
| 2190 | if (winsock_lib == NULL) |
| 2191 | { |
| 2192 | h_errno = ENETDOWN; |
| 2193 | return NULL; |
| 2194 | } |
| 2195 | |
| 2196 | check_errno (); |
| 2197 | serv = pfn_getservbyname (name, proto); |
| 2198 | if (!serv) |
| 2199 | set_errno (); |
| 2200 | return serv; |
| 2201 | } |
| 2202 | |
| 2203 | int |
| 2204 | sys_shutdown (int s, int how) |
| 2205 | { |
| 2206 | int rc; |
| 2207 | |
| 2208 | if (winsock_lib == NULL) |
| 2209 | { |
| 2210 | h_errno = ENETDOWN; |
| 2211 | return SOCKET_ERROR; |
| 2212 | } |
| 2213 | |
| 2214 | check_errno (); |
| 2215 | if (fd_info[s].flags & FILE_SOCKET) |
| 2216 | { |
| 2217 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); |
| 2218 | if (rc == SOCKET_ERROR) |
| 2219 | set_errno (); |
| 2220 | return rc; |
| 2221 | } |
| 2222 | h_errno = ENOTSOCK; |
| 2223 | return SOCKET_ERROR; |
| 2224 | } |
| 2225 | |
| 2226 | #endif /* HAVE_SOCKETS */ |
| 2227 | |
| 2228 | |
| 2229 | /* Shadow main io functions: we need to handle pipes and sockets more |
| 2230 | intelligently, and implement non-blocking mode as well. */ |
| 2231 | |
| 2232 | int |
| 2233 | sys_close (int fd) |
| 2234 | { |
| 2235 | int rc; |
| 2236 | |
| 2237 | if (fd < 0 || fd >= MAXDESC) |
| 2238 | { |
| 2239 | errno = EBADF; |
| 2240 | return -1; |
| 2241 | } |
| 2242 | |
| 2243 | if (fd_info[fd].cp) |
| 2244 | { |
| 2245 | child_process * cp = fd_info[fd].cp; |
| 2246 | |
| 2247 | fd_info[fd].cp = NULL; |
| 2248 | |
| 2249 | if (CHILD_ACTIVE (cp)) |
| 2250 | { |
| 2251 | /* if last descriptor to active child_process then cleanup */ |
| 2252 | int i; |
| 2253 | for (i = 0; i < MAXDESC; i++) |
| 2254 | { |
| 2255 | if (i == fd) |
| 2256 | continue; |
| 2257 | if (fd_info[i].cp == cp) |
| 2258 | break; |
| 2259 | } |
| 2260 | if (i == MAXDESC) |
| 2261 | { |
| 2262 | #ifdef HAVE_SOCKETS |
| 2263 | if (fd_info[fd].flags & FILE_SOCKET) |
| 2264 | { |
| 2265 | #ifndef SOCK_REPLACE_HANDLE |
| 2266 | if (winsock_lib == NULL) abort (); |
| 2267 | |
| 2268 | pfn_shutdown (SOCK_HANDLE (fd), 2); |
| 2269 | rc = pfn_closesocket (SOCK_HANDLE (fd)); |
| 2270 | #endif |
| 2271 | winsock_inuse--; /* count open sockets */ |
| 2272 | } |
| 2273 | #endif |
| 2274 | delete_child (cp); |
| 2275 | } |
| 2276 | } |
| 2277 | } |
| 2278 | |
| 2279 | /* Note that sockets do not need special treatment here (at least on |
| 2280 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
| 2281 | closesocket is equivalent to CloseHandle, which is to be expected |
| 2282 | because socket handles are fully fledged kernel handles. */ |
| 2283 | rc = _close (fd); |
| 2284 | |
| 2285 | if (rc == 0) |
| 2286 | fd_info[fd].flags = 0; |
| 2287 | |
| 2288 | return rc; |
| 2289 | } |
| 2290 | |
| 2291 | int |
| 2292 | sys_dup (int fd) |
| 2293 | { |
| 2294 | int new_fd; |
| 2295 | |
| 2296 | new_fd = _dup (fd); |
| 2297 | if (new_fd >= 0) |
| 2298 | { |
| 2299 | /* duplicate our internal info as well */ |
| 2300 | fd_info[new_fd] = fd_info[fd]; |
| 2301 | } |
| 2302 | return new_fd; |
| 2303 | } |
| 2304 | |
| 2305 | |
| 2306 | int |
| 2307 | sys_dup2 (int src, int dst) |
| 2308 | { |
| 2309 | int rc; |
| 2310 | |
| 2311 | if (dst < 0 || dst >= MAXDESC) |
| 2312 | { |
| 2313 | errno = EBADF; |
| 2314 | return -1; |
| 2315 | } |
| 2316 | |
| 2317 | /* make sure we close the destination first if it's a pipe or socket */ |
| 2318 | if (src != dst && fd_info[dst].flags != 0) |
| 2319 | sys_close (dst); |
| 2320 | |
| 2321 | rc = _dup2 (src, dst); |
| 2322 | if (rc == 0) |
| 2323 | { |
| 2324 | /* duplicate our internal info as well */ |
| 2325 | fd_info[dst] = fd_info[src]; |
| 2326 | } |
| 2327 | return rc; |
| 2328 | } |
| 2329 | |
| 2330 | /* From callproc.c */ |
| 2331 | extern Lisp_Object Vbinary_process_input; |
| 2332 | extern Lisp_Object Vbinary_process_output; |
| 2333 | |
| 2334 | /* Unix pipe() has only one arg */ |
| 2335 | int |
| 2336 | sys_pipe (int * phandles) |
| 2337 | { |
| 2338 | int rc; |
| 2339 | unsigned flags; |
| 2340 | child_process * cp; |
| 2341 | |
| 2342 | /* make pipe handles non-inheritable; when we spawn a child, we |
| 2343 | replace the relevant handle with an inheritable one. Also put |
| 2344 | pipes into binary mode; we will do text mode translation ourselves |
| 2345 | if required. */ |
| 2346 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); |
| 2347 | |
| 2348 | if (rc == 0) |
| 2349 | { |
| 2350 | flags = FILE_PIPE | FILE_READ; |
| 2351 | if (!NILP (Vbinary_process_output)) |
| 2352 | flags |= FILE_BINARY; |
| 2353 | fd_info[phandles[0]].flags = flags; |
| 2354 | |
| 2355 | flags = FILE_PIPE | FILE_WRITE; |
| 2356 | if (!NILP (Vbinary_process_input)) |
| 2357 | flags |= FILE_BINARY; |
| 2358 | fd_info[phandles[1]].flags = flags; |
| 2359 | } |
| 2360 | |
| 2361 | return rc; |
| 2362 | } |
| 2363 | |
| 2364 | /* From ntproc.c */ |
| 2365 | extern Lisp_Object Vw32_pipe_read_delay; |
| 2366 | |
| 2367 | /* Function to do blocking read of one byte, needed to implement |
| 2368 | select. It is only allowed on sockets and pipes. */ |
| 2369 | int |
| 2370 | _sys_read_ahead (int fd) |
| 2371 | { |
| 2372 | child_process * cp; |
| 2373 | int rc; |
| 2374 | |
| 2375 | if (fd < 0 || fd >= MAXDESC) |
| 2376 | return STATUS_READ_ERROR; |
| 2377 | |
| 2378 | cp = fd_info[fd].cp; |
| 2379 | |
| 2380 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 2381 | return STATUS_READ_ERROR; |
| 2382 | |
| 2383 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 |
| 2384 | || (fd_info[fd].flags & FILE_READ) == 0) |
| 2385 | { |
| 2386 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); |
| 2387 | abort (); |
| 2388 | } |
| 2389 | |
| 2390 | cp->status = STATUS_READ_IN_PROGRESS; |
| 2391 | |
| 2392 | if (fd_info[fd].flags & FILE_PIPE) |
| 2393 | { |
| 2394 | rc = _read (fd, &cp->chr, sizeof (char)); |
| 2395 | |
| 2396 | /* Give subprocess time to buffer some more output for us before |
| 2397 | reporting that input is available; we need this because Windows 95 |
| 2398 | connects DOS programs to pipes by making the pipe appear to be |
| 2399 | the normal console stdout - as a result most DOS programs will |
| 2400 | write to stdout without buffering, ie. one character at a |
| 2401 | time. Even some W32 programs do this - "dir" in a command |
| 2402 | shell on NT is very slow if we don't do this. */ |
| 2403 | if (rc > 0) |
| 2404 | { |
| 2405 | int wait = XINT (Vw32_pipe_read_delay); |
| 2406 | |
| 2407 | if (wait > 0) |
| 2408 | Sleep (wait); |
| 2409 | else if (wait < 0) |
| 2410 | while (++wait <= 0) |
| 2411 | /* Yield remainder of our time slice, effectively giving a |
| 2412 | temporary priority boost to the child process. */ |
| 2413 | Sleep (0); |
| 2414 | } |
| 2415 | } |
| 2416 | #ifdef HAVE_SOCKETS |
| 2417 | else if (fd_info[fd].flags & FILE_SOCKET) |
| 2418 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); |
| 2419 | #endif |
| 2420 | |
| 2421 | if (rc == sizeof (char)) |
| 2422 | cp->status = STATUS_READ_SUCCEEDED; |
| 2423 | else |
| 2424 | cp->status = STATUS_READ_FAILED; |
| 2425 | |
| 2426 | return cp->status; |
| 2427 | } |
| 2428 | |
| 2429 | int |
| 2430 | sys_read (int fd, char * buffer, unsigned int count) |
| 2431 | { |
| 2432 | int nchars; |
| 2433 | int to_read; |
| 2434 | DWORD waiting; |
| 2435 | char * orig_buffer = buffer; |
| 2436 | |
| 2437 | if (fd < 0 || fd >= MAXDESC) |
| 2438 | { |
| 2439 | errno = EBADF; |
| 2440 | return -1; |
| 2441 | } |
| 2442 | |
| 2443 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 2444 | { |
| 2445 | child_process *cp = fd_info[fd].cp; |
| 2446 | |
| 2447 | if ((fd_info[fd].flags & FILE_READ) == 0) |
| 2448 | { |
| 2449 | errno = EBADF; |
| 2450 | return -1; |
| 2451 | } |
| 2452 | |
| 2453 | nchars = 0; |
| 2454 | |
| 2455 | /* re-read CR carried over from last read */ |
| 2456 | if (fd_info[fd].flags & FILE_LAST_CR) |
| 2457 | { |
| 2458 | if (fd_info[fd].flags & FILE_BINARY) abort (); |
| 2459 | *buffer++ = 0x0d; |
| 2460 | count--; |
| 2461 | nchars++; |
| 2462 | } |
| 2463 | |
| 2464 | /* presence of a child_process structure means we are operating in |
| 2465 | non-blocking mode - otherwise we just call _read directly. |
| 2466 | Note that the child_process structure might be missing because |
| 2467 | reap_subprocess has been called; in this case the pipe is |
| 2468 | already broken, so calling _read on it is okay. */ |
| 2469 | if (cp) |
| 2470 | { |
| 2471 | int current_status = cp->status; |
| 2472 | |
| 2473 | switch (current_status) |
| 2474 | { |
| 2475 | case STATUS_READ_FAILED: |
| 2476 | case STATUS_READ_ERROR: |
| 2477 | /* report normal EOF */ |
| 2478 | return 0; |
| 2479 | |
| 2480 | case STATUS_READ_READY: |
| 2481 | case STATUS_READ_IN_PROGRESS: |
| 2482 | DebPrint (("sys_read called when read is in progress\n")); |
| 2483 | errno = EWOULDBLOCK; |
| 2484 | return -1; |
| 2485 | |
| 2486 | case STATUS_READ_SUCCEEDED: |
| 2487 | /* consume read-ahead char */ |
| 2488 | *buffer++ = cp->chr; |
| 2489 | count--; |
| 2490 | nchars++; |
| 2491 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 2492 | ResetEvent (cp->char_avail); |
| 2493 | |
| 2494 | case STATUS_READ_ACKNOWLEDGED: |
| 2495 | break; |
| 2496 | |
| 2497 | default: |
| 2498 | DebPrint (("sys_read: bad status %d\n", current_status)); |
| 2499 | errno = EBADF; |
| 2500 | return -1; |
| 2501 | } |
| 2502 | |
| 2503 | if (fd_info[fd].flags & FILE_PIPE) |
| 2504 | { |
| 2505 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); |
| 2506 | to_read = min (waiting, (DWORD) count); |
| 2507 | |
| 2508 | nchars += _read (fd, buffer, to_read); |
| 2509 | } |
| 2510 | #ifdef HAVE_SOCKETS |
| 2511 | else /* FILE_SOCKET */ |
| 2512 | { |
| 2513 | if (winsock_lib == NULL) abort (); |
| 2514 | |
| 2515 | /* do the equivalent of a non-blocking read */ |
| 2516 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); |
| 2517 | if (waiting == 0 && nchars == 0) |
| 2518 | { |
| 2519 | h_errno = errno = EWOULDBLOCK; |
| 2520 | return -1; |
| 2521 | } |
| 2522 | |
| 2523 | if (waiting) |
| 2524 | { |
| 2525 | /* always use binary mode for sockets */ |
| 2526 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
| 2527 | if (res == SOCKET_ERROR) |
| 2528 | { |
| 2529 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", |
| 2530 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 2531 | set_errno (); |
| 2532 | return -1; |
| 2533 | } |
| 2534 | nchars += res; |
| 2535 | } |
| 2536 | } |
| 2537 | #endif |
| 2538 | } |
| 2539 | else |
| 2540 | nchars += _read (fd, buffer, count); |
| 2541 | |
| 2542 | /* Perform text mode translation if required. */ |
| 2543 | if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 2544 | { |
| 2545 | nchars = crlf_to_lf (nchars, orig_buffer); |
| 2546 | /* If buffer contains only CR, return that. To be absolutely |
| 2547 | sure we should attempt to read the next char, but in |
| 2548 | practice a CR to be followed by LF would not appear by |
| 2549 | itself in the buffer. */ |
| 2550 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) |
| 2551 | { |
| 2552 | fd_info[fd].flags |= FILE_LAST_CR; |
| 2553 | nchars--; |
| 2554 | } |
| 2555 | else |
| 2556 | fd_info[fd].flags &= ~FILE_LAST_CR; |
| 2557 | } |
| 2558 | } |
| 2559 | else |
| 2560 | nchars = _read (fd, buffer, count); |
| 2561 | |
| 2562 | return nchars; |
| 2563 | } |
| 2564 | |
| 2565 | /* For now, don't bother with a non-blocking mode */ |
| 2566 | int |
| 2567 | sys_write (int fd, const void * buffer, unsigned int count) |
| 2568 | { |
| 2569 | int nchars; |
| 2570 | |
| 2571 | if (fd < 0 || fd >= MAXDESC) |
| 2572 | { |
| 2573 | errno = EBADF; |
| 2574 | return -1; |
| 2575 | } |
| 2576 | |
| 2577 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 2578 | { |
| 2579 | if ((fd_info[fd].flags & FILE_WRITE) == 0) |
| 2580 | { |
| 2581 | errno = EBADF; |
| 2582 | return -1; |
| 2583 | } |
| 2584 | |
| 2585 | /* Perform text mode translation if required. */ |
| 2586 | if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 2587 | { |
| 2588 | char * tmpbuf = alloca (count * 2); |
| 2589 | unsigned char * src = (void *)buffer; |
| 2590 | unsigned char * dst = tmpbuf; |
| 2591 | int nbytes = count; |
| 2592 | |
| 2593 | while (1) |
| 2594 | { |
| 2595 | unsigned char *next; |
| 2596 | /* copy next line or remaining bytes */ |
| 2597 | next = _memccpy (dst, src, '\n', nbytes); |
| 2598 | if (next) |
| 2599 | { |
| 2600 | /* copied one line ending with '\n' */ |
| 2601 | int copied = next - dst; |
| 2602 | nbytes -= copied; |
| 2603 | src += copied; |
| 2604 | /* insert '\r' before '\n' */ |
| 2605 | next[-1] = '\r'; |
| 2606 | next[0] = '\n'; |
| 2607 | dst = next + 1; |
| 2608 | count++; |
| 2609 | } |
| 2610 | else |
| 2611 | /* copied remaining partial line -> now finished */ |
| 2612 | break; |
| 2613 | } |
| 2614 | buffer = tmpbuf; |
| 2615 | } |
| 2616 | } |
| 2617 | |
| 2618 | #ifdef HAVE_SOCKETS |
| 2619 | if (fd_info[fd].flags & FILE_SOCKET) |
| 2620 | { |
| 2621 | if (winsock_lib == NULL) abort (); |
| 2622 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
| 2623 | if (nchars == SOCKET_ERROR) |
| 2624 | { |
| 2625 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", |
| 2626 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 2627 | set_errno (); |
| 2628 | } |
| 2629 | } |
| 2630 | else |
| 2631 | #endif |
| 2632 | nchars = _write (fd, buffer, count); |
| 2633 | |
| 2634 | return nchars; |
| 2635 | } |
| 2636 | |
| 2637 | |
| 2638 | void |
| 2639 | term_ntproc () |
| 2640 | { |
| 2641 | #ifdef HAVE_SOCKETS |
| 2642 | /* shutdown the socket interface if necessary */ |
| 2643 | term_winsock (); |
| 2644 | #endif |
| 2645 | } |
| 2646 | |
| 2647 | void |
| 2648 | init_ntproc () |
| 2649 | { |
| 2650 | #ifdef HAVE_SOCKETS |
| 2651 | /* Initialise the socket interface now if available and requested by |
| 2652 | the user by defining PRELOAD_WINSOCK; otherwise loading will be |
| 2653 | delayed until open-network-stream is called (w32-has-winsock can |
| 2654 | also be used to dynamically load or reload winsock). |
| 2655 | |
| 2656 | Conveniently, init_environment is called before us, so |
| 2657 | PRELOAD_WINSOCK can be set in the registry. */ |
| 2658 | |
| 2659 | /* Always initialize this correctly. */ |
| 2660 | winsock_lib = NULL; |
| 2661 | |
| 2662 | if (getenv ("PRELOAD_WINSOCK") != NULL) |
| 2663 | init_winsock (TRUE); |
| 2664 | #endif |
| 2665 | |
| 2666 | /* Initial preparation for subprocess support: replace our standard |
| 2667 | handles with non-inheritable versions. */ |
| 2668 | { |
| 2669 | HANDLE parent; |
| 2670 | HANDLE stdin_save = INVALID_HANDLE_VALUE; |
| 2671 | HANDLE stdout_save = INVALID_HANDLE_VALUE; |
| 2672 | HANDLE stderr_save = INVALID_HANDLE_VALUE; |
| 2673 | |
| 2674 | parent = GetCurrentProcess (); |
| 2675 | |
| 2676 | /* ignore errors when duplicating and closing; typically the |
| 2677 | handles will be invalid when running as a gui program. */ |
| 2678 | DuplicateHandle (parent, |
| 2679 | GetStdHandle (STD_INPUT_HANDLE), |
| 2680 | parent, |
| 2681 | &stdin_save, |
| 2682 | 0, |
| 2683 | FALSE, |
| 2684 | DUPLICATE_SAME_ACCESS); |
| 2685 | |
| 2686 | DuplicateHandle (parent, |
| 2687 | GetStdHandle (STD_OUTPUT_HANDLE), |
| 2688 | parent, |
| 2689 | &stdout_save, |
| 2690 | 0, |
| 2691 | FALSE, |
| 2692 | DUPLICATE_SAME_ACCESS); |
| 2693 | |
| 2694 | DuplicateHandle (parent, |
| 2695 | GetStdHandle (STD_ERROR_HANDLE), |
| 2696 | parent, |
| 2697 | &stderr_save, |
| 2698 | 0, |
| 2699 | FALSE, |
| 2700 | DUPLICATE_SAME_ACCESS); |
| 2701 | |
| 2702 | fclose (stdin); |
| 2703 | fclose (stdout); |
| 2704 | fclose (stderr); |
| 2705 | |
| 2706 | if (stdin_save != INVALID_HANDLE_VALUE) |
| 2707 | _open_osfhandle ((long) stdin_save, O_TEXT); |
| 2708 | else |
| 2709 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
| 2710 | _fdopen (0, "r"); |
| 2711 | |
| 2712 | if (stdout_save != INVALID_HANDLE_VALUE) |
| 2713 | _open_osfhandle ((long) stdout_save, O_TEXT); |
| 2714 | else |
| 2715 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 2716 | _fdopen (1, "w"); |
| 2717 | |
| 2718 | if (stderr_save != INVALID_HANDLE_VALUE) |
| 2719 | _open_osfhandle ((long) stderr_save, O_TEXT); |
| 2720 | else |
| 2721 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 2722 | _fdopen (2, "w"); |
| 2723 | } |
| 2724 | |
| 2725 | /* unfortunately, atexit depends on implementation of malloc */ |
| 2726 | /* atexit (term_ntproc); */ |
| 2727 | signal (SIGABRT, term_ntproc); |
| 2728 | |
| 2729 | /* determine which drives are fixed, for GetCachedVolumeInformation */ |
| 2730 | { |
| 2731 | /* GetDriveType must have trailing backslash. */ |
| 2732 | char drive[] = "A:\\"; |
| 2733 | |
| 2734 | /* Loop over all possible drive letters */ |
| 2735 | while (*drive <= 'Z') |
| 2736 | { |
| 2737 | /* Record if this drive letter refers to a fixed drive. */ |
| 2738 | fixed_drives[DRIVE_INDEX (*drive)] = |
| 2739 | (GetDriveType (drive) == DRIVE_FIXED); |
| 2740 | |
| 2741 | (*drive)++; |
| 2742 | } |
| 2743 | } |
| 2744 | } |
| 2745 | |
| 2746 | /* end of nt.c */ |