| 1 | /* Utility and Unix shadow routines for GNU Emacs on Windows NT. |
| 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 <stdlib.h> |
| 26 | #include <stdio.h> |
| 27 | #include <io.h> |
| 28 | #include <errno.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <ctype.h> |
| 31 | #include <signal.h> |
| 32 | #include <sys/time.h> |
| 33 | |
| 34 | /* must include CRT headers *before* config.h */ |
| 35 | #include "config.h" |
| 36 | #undef access |
| 37 | #undef chdir |
| 38 | #undef chmod |
| 39 | #undef creat |
| 40 | #undef ctime |
| 41 | #undef fopen |
| 42 | #undef link |
| 43 | #undef mkdir |
| 44 | #undef mktemp |
| 45 | #undef open |
| 46 | #undef rename |
| 47 | #undef rmdir |
| 48 | #undef unlink |
| 49 | |
| 50 | #undef close |
| 51 | #undef dup |
| 52 | #undef dup2 |
| 53 | #undef pipe |
| 54 | #undef read |
| 55 | #undef write |
| 56 | |
| 57 | #define getwd _getwd |
| 58 | #include "lisp.h" |
| 59 | #undef getwd |
| 60 | |
| 61 | #include <pwd.h> |
| 62 | |
| 63 | #include <windows.h> |
| 64 | |
| 65 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 66 | #include <sys/socket.h> |
| 67 | #undef socket |
| 68 | #undef bind |
| 69 | #undef connect |
| 70 | #undef htons |
| 71 | #undef ntohs |
| 72 | #undef inet_addr |
| 73 | #undef gethostname |
| 74 | #undef gethostbyname |
| 75 | #undef getservbyname |
| 76 | #endif |
| 77 | |
| 78 | #include "w32.h" |
| 79 | #include "ndir.h" |
| 80 | #include "w32heap.h" |
| 81 | |
| 82 | /* Get the current working directory. */ |
| 83 | char * |
| 84 | getwd (char *dir) |
| 85 | { |
| 86 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
| 87 | return dir; |
| 88 | return NULL; |
| 89 | } |
| 90 | |
| 91 | #ifndef HAVE_SOCKETS |
| 92 | /* Emulate gethostname. */ |
| 93 | int |
| 94 | gethostname (char *buffer, int size) |
| 95 | { |
| 96 | /* NT only allows small host names, so the buffer is |
| 97 | certainly large enough. */ |
| 98 | return !GetComputerName (buffer, &size); |
| 99 | } |
| 100 | #endif /* HAVE_SOCKETS */ |
| 101 | |
| 102 | /* Emulate getloadavg. */ |
| 103 | int |
| 104 | getloadavg (double loadavg[], int nelem) |
| 105 | { |
| 106 | int i; |
| 107 | |
| 108 | /* A faithful emulation is going to have to be saved for a rainy day. */ |
| 109 | for (i = 0; i < nelem; i++) |
| 110 | { |
| 111 | loadavg[i] = 0.0; |
| 112 | } |
| 113 | return i; |
| 114 | } |
| 115 | |
| 116 | /* Emulate the Unix directory procedures opendir, closedir, |
| 117 | and readdir. We can't use the procedures supplied in sysdep.c, |
| 118 | so we provide them here. */ |
| 119 | |
| 120 | struct direct dir_static; /* simulated directory contents */ |
| 121 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; |
| 122 | static int dir_is_fat; |
| 123 | static char dir_pathname[MAXPATHLEN+1]; |
| 124 | |
| 125 | extern Lisp_Object Vw32_downcase_file_names; |
| 126 | |
| 127 | DIR * |
| 128 | opendir (char *filename) |
| 129 | { |
| 130 | DIR *dirp; |
| 131 | |
| 132 | /* Opening is done by FindFirstFile. However, a read is inherent to |
| 133 | this operation, so we defer the open until read time. */ |
| 134 | |
| 135 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) |
| 136 | return NULL; |
| 137 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 138 | return NULL; |
| 139 | |
| 140 | dirp->dd_fd = 0; |
| 141 | dirp->dd_loc = 0; |
| 142 | dirp->dd_size = 0; |
| 143 | |
| 144 | strncpy (dir_pathname, filename, MAXPATHLEN); |
| 145 | dir_pathname[MAXPATHLEN] = '\0'; |
| 146 | dir_is_fat = is_fat_volume (filename, NULL); |
| 147 | |
| 148 | return dirp; |
| 149 | } |
| 150 | |
| 151 | void |
| 152 | closedir (DIR *dirp) |
| 153 | { |
| 154 | /* If we have a find-handle open, close it. */ |
| 155 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 156 | { |
| 157 | FindClose (dir_find_handle); |
| 158 | dir_find_handle = INVALID_HANDLE_VALUE; |
| 159 | } |
| 160 | xfree ((char *) dirp); |
| 161 | } |
| 162 | |
| 163 | struct direct * |
| 164 | readdir (DIR *dirp) |
| 165 | { |
| 166 | WIN32_FIND_DATA find_data; |
| 167 | |
| 168 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
| 169 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 170 | { |
| 171 | char filename[MAXNAMLEN + 3]; |
| 172 | int ln; |
| 173 | |
| 174 | strcpy (filename, dir_pathname); |
| 175 | ln = strlen (filename) - 1; |
| 176 | if (!IS_DIRECTORY_SEP (filename[ln])) |
| 177 | strcat (filename, "\\"); |
| 178 | strcat (filename, "*"); |
| 179 | |
| 180 | dir_find_handle = FindFirstFile (filename, &find_data); |
| 181 | |
| 182 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 183 | return NULL; |
| 184 | } |
| 185 | else |
| 186 | { |
| 187 | if (!FindNextFile (dir_find_handle, &find_data)) |
| 188 | return NULL; |
| 189 | } |
| 190 | |
| 191 | /* Emacs never uses this value, so don't bother making it match |
| 192 | value returned by stat(). */ |
| 193 | dir_static.d_ino = 1; |
| 194 | |
| 195 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + |
| 196 | dir_static.d_namlen - dir_static.d_namlen % 4; |
| 197 | |
| 198 | dir_static.d_namlen = strlen (find_data.cFileName); |
| 199 | strcpy (dir_static.d_name, find_data.cFileName); |
| 200 | if (dir_is_fat) |
| 201 | _strlwr (dir_static.d_name); |
| 202 | else if (!NILP (Vw32_downcase_file_names)) |
| 203 | { |
| 204 | register char *p; |
| 205 | for (p = dir_static.d_name; *p; p++) |
| 206 | if (*p >= 'a' && *p <= 'z') |
| 207 | break; |
| 208 | if (!*p) |
| 209 | _strlwr (dir_static.d_name); |
| 210 | } |
| 211 | |
| 212 | return &dir_static; |
| 213 | } |
| 214 | |
| 215 | /* Emulate getpwuid, getpwnam and others. */ |
| 216 | |
| 217 | #define PASSWD_FIELD_SIZE 256 |
| 218 | |
| 219 | static char the_passwd_name[PASSWD_FIELD_SIZE]; |
| 220 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; |
| 221 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; |
| 222 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; |
| 223 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; |
| 224 | |
| 225 | static struct passwd the_passwd = |
| 226 | { |
| 227 | the_passwd_name, |
| 228 | the_passwd_passwd, |
| 229 | 0, |
| 230 | 0, |
| 231 | 0, |
| 232 | the_passwd_gecos, |
| 233 | the_passwd_dir, |
| 234 | the_passwd_shell, |
| 235 | }; |
| 236 | |
| 237 | int |
| 238 | getuid () |
| 239 | { |
| 240 | return the_passwd.pw_uid; |
| 241 | } |
| 242 | |
| 243 | int |
| 244 | geteuid () |
| 245 | { |
| 246 | /* I could imagine arguing for checking to see whether the user is |
| 247 | in the Administrators group and returning a UID of 0 for that |
| 248 | case, but I don't know how wise that would be in the long run. */ |
| 249 | return getuid (); |
| 250 | } |
| 251 | |
| 252 | int |
| 253 | getgid () |
| 254 | { |
| 255 | return the_passwd.pw_gid; |
| 256 | } |
| 257 | |
| 258 | int |
| 259 | getegid () |
| 260 | { |
| 261 | return getgid (); |
| 262 | } |
| 263 | |
| 264 | struct passwd * |
| 265 | getpwuid (int uid) |
| 266 | { |
| 267 | if (uid == the_passwd.pw_uid) |
| 268 | return &the_passwd; |
| 269 | return NULL; |
| 270 | } |
| 271 | |
| 272 | struct passwd * |
| 273 | getpwnam (char *name) |
| 274 | { |
| 275 | struct passwd *pw; |
| 276 | |
| 277 | pw = getpwuid (getuid ()); |
| 278 | if (!pw) |
| 279 | return pw; |
| 280 | |
| 281 | if (stricmp (name, pw->pw_name)) |
| 282 | return NULL; |
| 283 | |
| 284 | return pw; |
| 285 | } |
| 286 | |
| 287 | void |
| 288 | init_user_info () |
| 289 | { |
| 290 | /* Find the user's real name by opening the process token and |
| 291 | looking up the name associated with the user-sid in that token. |
| 292 | |
| 293 | Use the relative portion of the identifier authority value from |
| 294 | the user-sid as the user id value (same for group id using the |
| 295 | primary group sid from the process token). */ |
| 296 | |
| 297 | char user_sid[256], name[256], domain[256]; |
| 298 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; |
| 299 | HANDLE token = NULL; |
| 300 | SID_NAME_USE user_type; |
| 301 | |
| 302 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) |
| 303 | && GetTokenInformation (token, TokenUser, |
| 304 | (PVOID) user_sid, sizeof (user_sid), &trash) |
| 305 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, |
| 306 | domain, &dlength, &user_type)) |
| 307 | { |
| 308 | strcpy (the_passwd.pw_name, name); |
| 309 | /* Determine a reasonable uid value. */ |
| 310 | if (stricmp ("administrator", name) == 0) |
| 311 | { |
| 312 | the_passwd.pw_uid = 0; |
| 313 | the_passwd.pw_gid = 0; |
| 314 | } |
| 315 | else |
| 316 | { |
| 317 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 318 | |
| 319 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 320 | /* I believe the relative portion is the last 4 bytes (of 6) |
| 321 | with msb first. */ |
| 322 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + |
| 323 | (pSIA->Value[3] << 16) + |
| 324 | (pSIA->Value[4] << 8) + |
| 325 | (pSIA->Value[5] << 0)); |
| 326 | /* restrict to conventional uid range for normal users */ |
| 327 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; |
| 328 | |
| 329 | /* Get group id */ |
| 330 | if (GetTokenInformation (token, TokenPrimaryGroup, |
| 331 | (PVOID) user_sid, sizeof (user_sid), &trash)) |
| 332 | { |
| 333 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 334 | |
| 335 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 336 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + |
| 337 | (pSIA->Value[3] << 16) + |
| 338 | (pSIA->Value[4] << 8) + |
| 339 | (pSIA->Value[5] << 0)); |
| 340 | /* I don't know if this is necessary, but for safety... */ |
| 341 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; |
| 342 | } |
| 343 | else |
| 344 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 345 | } |
| 346 | } |
| 347 | /* If security calls are not supported (presumably because we |
| 348 | are running under Windows 95), fallback to this. */ |
| 349 | else if (GetUserName (name, &length)) |
| 350 | { |
| 351 | strcpy (the_passwd.pw_name, name); |
| 352 | if (stricmp ("administrator", name) == 0) |
| 353 | the_passwd.pw_uid = 0; |
| 354 | else |
| 355 | the_passwd.pw_uid = 123; |
| 356 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 357 | } |
| 358 | else |
| 359 | { |
| 360 | strcpy (the_passwd.pw_name, "unknown"); |
| 361 | the_passwd.pw_uid = 123; |
| 362 | the_passwd.pw_gid = 123; |
| 363 | } |
| 364 | |
| 365 | /* Ensure HOME and SHELL are defined. */ |
| 366 | if (getenv ("HOME") == NULL) |
| 367 | putenv ("HOME=c:/"); |
| 368 | if (getenv ("SHELL") == NULL) |
| 369 | putenv ((GetVersion () & 0x80000000) ? "SHELL=command" : "SHELL=cmd"); |
| 370 | |
| 371 | /* Set dir and shell from environment variables. */ |
| 372 | strcpy (the_passwd.pw_dir, getenv ("HOME")); |
| 373 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); |
| 374 | |
| 375 | if (token) |
| 376 | CloseHandle (token); |
| 377 | } |
| 378 | |
| 379 | int |
| 380 | random () |
| 381 | { |
| 382 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
| 383 | return ((rand () << 15) | rand ()); |
| 384 | } |
| 385 | |
| 386 | void |
| 387 | srandom (int seed) |
| 388 | { |
| 389 | srand (seed); |
| 390 | } |
| 391 | |
| 392 | /* Normalize filename by converting all path separators to |
| 393 | the specified separator. Also conditionally convert upper |
| 394 | case path name components to lower case. */ |
| 395 | |
| 396 | static void |
| 397 | normalize_filename (fp, path_sep) |
| 398 | register char *fp; |
| 399 | char path_sep; |
| 400 | { |
| 401 | char sep; |
| 402 | char *elem; |
| 403 | |
| 404 | /* Always lower-case drive letters a-z, even if the filesystem |
| 405 | preserves case in filenames. |
| 406 | This is so filenames can be compared by string comparison |
| 407 | functions that are case-sensitive. Even case-preserving filesystems |
| 408 | do not distinguish case in drive letters. */ |
| 409 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') |
| 410 | { |
| 411 | *fp += 'a' - 'A'; |
| 412 | fp += 2; |
| 413 | } |
| 414 | |
| 415 | if (NILP (Vw32_downcase_file_names)) |
| 416 | { |
| 417 | while (*fp) |
| 418 | { |
| 419 | if (*fp == '/' || *fp == '\\') |
| 420 | *fp = path_sep; |
| 421 | fp++; |
| 422 | } |
| 423 | return; |
| 424 | } |
| 425 | |
| 426 | sep = path_sep; /* convert to this path separator */ |
| 427 | elem = fp; /* start of current path element */ |
| 428 | |
| 429 | do { |
| 430 | if (*fp >= 'a' && *fp <= 'z') |
| 431 | elem = 0; /* don't convert this element */ |
| 432 | |
| 433 | if (*fp == 0 || *fp == ':') |
| 434 | { |
| 435 | sep = *fp; /* restore current separator (or 0) */ |
| 436 | *fp = '/'; /* after conversion of this element */ |
| 437 | } |
| 438 | |
| 439 | if (*fp == '/' || *fp == '\\') |
| 440 | { |
| 441 | if (elem && elem != fp) |
| 442 | { |
| 443 | *fp = 0; /* temporary end of string */ |
| 444 | _strlwr (elem); /* while we convert to lower case */ |
| 445 | } |
| 446 | *fp = sep; /* convert (or restore) path separator */ |
| 447 | elem = fp + 1; /* next element starts after separator */ |
| 448 | sep = path_sep; |
| 449 | } |
| 450 | } while (*fp++); |
| 451 | } |
| 452 | |
| 453 | /* Destructively turn backslashes into slashes. */ |
| 454 | void |
| 455 | dostounix_filename (p) |
| 456 | register char *p; |
| 457 | { |
| 458 | normalize_filename (p, '/'); |
| 459 | } |
| 460 | |
| 461 | /* Destructively turn slashes into backslashes. */ |
| 462 | void |
| 463 | unixtodos_filename (p) |
| 464 | register char *p; |
| 465 | { |
| 466 | normalize_filename (p, '\\'); |
| 467 | } |
| 468 | |
| 469 | /* Remove all CR's that are followed by a LF. |
| 470 | (From msdos.c...probably should figure out a way to share it, |
| 471 | although this code isn't going to ever change.) */ |
| 472 | int |
| 473 | crlf_to_lf (n, buf) |
| 474 | register int n; |
| 475 | register unsigned char *buf; |
| 476 | { |
| 477 | unsigned char *np = buf; |
| 478 | unsigned char *startp = buf; |
| 479 | unsigned char *endp = buf + n; |
| 480 | |
| 481 | if (n == 0) |
| 482 | return n; |
| 483 | while (buf < endp - 1) |
| 484 | { |
| 485 | if (*buf == 0x0d) |
| 486 | { |
| 487 | if (*(++buf) != 0x0a) |
| 488 | *np++ = 0x0d; |
| 489 | } |
| 490 | else |
| 491 | *np++ = *buf++; |
| 492 | } |
| 493 | if (buf < endp) |
| 494 | *np++ = *buf++; |
| 495 | return np - startp; |
| 496 | } |
| 497 | |
| 498 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
| 499 | |
| 500 | int |
| 501 | sigsetmask (int signal_mask) |
| 502 | { |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | int |
| 507 | sigblock (int sig) |
| 508 | { |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | int |
| 513 | setpgrp (int pid, int gid) |
| 514 | { |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | int |
| 519 | alarm (int seconds) |
| 520 | { |
| 521 | return 0; |
| 522 | } |
| 523 | |
| 524 | int |
| 525 | unrequest_sigio (void) |
| 526 | { |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | int |
| 531 | request_sigio (void) |
| 532 | { |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
| 537 | |
| 538 | LPBYTE |
| 539 | w32_get_resource (key, lpdwtype) |
| 540 | char *key; |
| 541 | LPDWORD lpdwtype; |
| 542 | { |
| 543 | LPBYTE lpvalue; |
| 544 | HKEY hrootkey = NULL; |
| 545 | DWORD cbData; |
| 546 | BOOL ok = FALSE; |
| 547 | |
| 548 | /* Check both the current user and the local machine to see if |
| 549 | we have any resources. */ |
| 550 | |
| 551 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 552 | { |
| 553 | lpvalue = NULL; |
| 554 | |
| 555 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 556 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 557 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 558 | { |
| 559 | return (lpvalue); |
| 560 | } |
| 561 | |
| 562 | if (lpvalue) xfree (lpvalue); |
| 563 | |
| 564 | RegCloseKey (hrootkey); |
| 565 | } |
| 566 | |
| 567 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 568 | { |
| 569 | lpvalue = NULL; |
| 570 | |
| 571 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS && |
| 572 | (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL && |
| 573 | RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 574 | { |
| 575 | return (lpvalue); |
| 576 | } |
| 577 | |
| 578 | if (lpvalue) xfree (lpvalue); |
| 579 | |
| 580 | RegCloseKey (hrootkey); |
| 581 | } |
| 582 | |
| 583 | return (NULL); |
| 584 | } |
| 585 | |
| 586 | void |
| 587 | init_environment () |
| 588 | { |
| 589 | /* Check for environment variables and use registry if they don't exist */ |
| 590 | { |
| 591 | int i; |
| 592 | LPBYTE lpval; |
| 593 | DWORD dwType; |
| 594 | |
| 595 | static char * env_vars[] = |
| 596 | { |
| 597 | "HOME", |
| 598 | "PRELOAD_WINSOCK", |
| 599 | "emacs_dir", |
| 600 | "EMACSLOADPATH", |
| 601 | "SHELL", |
| 602 | "EMACSDATA", |
| 603 | "EMACSPATH", |
| 604 | "EMACSLOCKDIR", |
| 605 | "INFOPATH", |
| 606 | "EMACSDOC", |
| 607 | "TERM", |
| 608 | }; |
| 609 | |
| 610 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 611 | { |
| 612 | if (!getenv (env_vars[i]) && |
| 613 | (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL) |
| 614 | { |
| 615 | if (dwType == REG_EXPAND_SZ) |
| 616 | { |
| 617 | char buf1[500], buf2[500]; |
| 618 | |
| 619 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, 500); |
| 620 | _snprintf (buf2, 499, "%s=%s", env_vars[i], buf1); |
| 621 | putenv (strdup (buf2)); |
| 622 | } |
| 623 | else if (dwType == REG_SZ) |
| 624 | { |
| 625 | char buf[500]; |
| 626 | |
| 627 | _snprintf (buf, 499, "%s=%s", env_vars[i], lpval); |
| 628 | putenv (strdup (buf)); |
| 629 | } |
| 630 | |
| 631 | xfree (lpval); |
| 632 | } |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | init_user_info (); |
| 637 | } |
| 638 | |
| 639 | /* We don't have scripts to automatically determine the system configuration |
| 640 | for Emacs before it's compiled, and we don't want to have to make the |
| 641 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime |
| 642 | routine. */ |
| 643 | |
| 644 | static char configuration_buffer[32]; |
| 645 | |
| 646 | char * |
| 647 | get_emacs_configuration (void) |
| 648 | { |
| 649 | char *arch, *oem, *os; |
| 650 | |
| 651 | /* Determine the processor type. */ |
| 652 | switch (get_processor_type ()) |
| 653 | { |
| 654 | |
| 655 | #ifdef PROCESSOR_INTEL_386 |
| 656 | case PROCESSOR_INTEL_386: |
| 657 | case PROCESSOR_INTEL_486: |
| 658 | case PROCESSOR_INTEL_PENTIUM: |
| 659 | arch = "i386"; |
| 660 | break; |
| 661 | #endif |
| 662 | |
| 663 | #ifdef PROCESSOR_INTEL_860 |
| 664 | case PROCESSOR_INTEL_860: |
| 665 | arch = "i860"; |
| 666 | break; |
| 667 | #endif |
| 668 | |
| 669 | #ifdef PROCESSOR_MIPS_R2000 |
| 670 | case PROCESSOR_MIPS_R2000: |
| 671 | case PROCESSOR_MIPS_R3000: |
| 672 | case PROCESSOR_MIPS_R4000: |
| 673 | arch = "mips"; |
| 674 | break; |
| 675 | #endif |
| 676 | |
| 677 | #ifdef PROCESSOR_ALPHA_21064 |
| 678 | case PROCESSOR_ALPHA_21064: |
| 679 | arch = "alpha"; |
| 680 | break; |
| 681 | #endif |
| 682 | |
| 683 | default: |
| 684 | arch = "unknown"; |
| 685 | break; |
| 686 | } |
| 687 | |
| 688 | /* Let oem be "*" until we figure out how to decode the OEM field. */ |
| 689 | oem = "*"; |
| 690 | |
| 691 | os = (GetVersion () & 0x80000000) ? "windows95" : "nt"; |
| 692 | |
| 693 | sprintf (configuration_buffer, "%s-%s-%s%d.%d", arch, oem, os, |
| 694 | get_w32_major_version (), get_w32_minor_version ()); |
| 695 | return configuration_buffer; |
| 696 | } |
| 697 | |
| 698 | #include <sys/timeb.h> |
| 699 | |
| 700 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ |
| 701 | void |
| 702 | gettimeofday (struct timeval *tv, struct timezone *tz) |
| 703 | { |
| 704 | struct _timeb tb; |
| 705 | _ftime (&tb); |
| 706 | |
| 707 | tv->tv_sec = tb.time; |
| 708 | tv->tv_usec = tb.millitm * 1000L; |
| 709 | if (tz) |
| 710 | { |
| 711 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ |
| 712 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | /* ------------------------------------------------------------------------- */ |
| 717 | /* IO support and wrapper functions for W32 API. */ |
| 718 | /* ------------------------------------------------------------------------- */ |
| 719 | |
| 720 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
| 721 | on network directories, so we handle that case here. |
| 722 | (Ulrich Leodolter, 1/11/95). */ |
| 723 | char * |
| 724 | sys_ctime (const time_t *t) |
| 725 | { |
| 726 | char *str = (char *) ctime (t); |
| 727 | return (str ? str : "Sun Jan 01 00:00:00 1970"); |
| 728 | } |
| 729 | |
| 730 | /* Emulate sleep...we could have done this with a define, but that |
| 731 | would necessitate including windows.h in the files that used it. |
| 732 | This is much easier. */ |
| 733 | void |
| 734 | sys_sleep (int seconds) |
| 735 | { |
| 736 | Sleep (seconds * 1000); |
| 737 | } |
| 738 | |
| 739 | /* Internal MSVC data and functions for low-level descriptor munging */ |
| 740 | #if (_MSC_VER == 900) |
| 741 | extern char _osfile[]; |
| 742 | #endif |
| 743 | extern int __cdecl _set_osfhnd (int fd, long h); |
| 744 | extern int __cdecl _free_osfhnd (int fd); |
| 745 | |
| 746 | /* parallel array of private info on file handles */ |
| 747 | filedesc fd_info [ MAXDESC ]; |
| 748 | |
| 749 | static struct { |
| 750 | DWORD serialnum; |
| 751 | DWORD maxcomp; |
| 752 | DWORD flags; |
| 753 | char name[32]; |
| 754 | char type[32]; |
| 755 | } volume_info; |
| 756 | |
| 757 | /* Get information on the volume where name is held; set path pointer to |
| 758 | start of pathname in name (past UNC header\volume header if present). */ |
| 759 | int |
| 760 | get_volume_info (const char * name, const char ** pPath) |
| 761 | { |
| 762 | char temp[MAX_PATH]; |
| 763 | char *rootname = NULL; /* default to current volume */ |
| 764 | |
| 765 | if (name == NULL) |
| 766 | return FALSE; |
| 767 | |
| 768 | /* find the root name of the volume if given */ |
| 769 | if (isalpha (name[0]) && name[1] == ':') |
| 770 | { |
| 771 | rootname = temp; |
| 772 | temp[0] = *name++; |
| 773 | temp[1] = *name++; |
| 774 | temp[2] = '\\'; |
| 775 | temp[3] = 0; |
| 776 | } |
| 777 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 778 | { |
| 779 | char *str = temp; |
| 780 | int slashes = 4; |
| 781 | rootname = temp; |
| 782 | do |
| 783 | { |
| 784 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 785 | break; |
| 786 | *str++ = *name++; |
| 787 | } |
| 788 | while ( *name ); |
| 789 | |
| 790 | *str++ = '\\'; |
| 791 | *str = 0; |
| 792 | } |
| 793 | |
| 794 | if (pPath) |
| 795 | *pPath = name; |
| 796 | |
| 797 | if (GetVolumeInformation (rootname, |
| 798 | volume_info.name, 32, |
| 799 | &volume_info.serialnum, |
| 800 | &volume_info.maxcomp, |
| 801 | &volume_info.flags, |
| 802 | volume_info.type, 32)) |
| 803 | { |
| 804 | return TRUE; |
| 805 | } |
| 806 | return FALSE; |
| 807 | } |
| 808 | |
| 809 | /* Determine if volume is FAT format (ie. only supports short 8.3 |
| 810 | names); also set path pointer to start of pathname in name. */ |
| 811 | int |
| 812 | is_fat_volume (const char * name, const char ** pPath) |
| 813 | { |
| 814 | if (get_volume_info (name, pPath)) |
| 815 | return (volume_info.maxcomp == 12); |
| 816 | return FALSE; |
| 817 | } |
| 818 | |
| 819 | /* Map filename to a legal 8.3 name if necessary. */ |
| 820 | const char * |
| 821 | map_w32_filename (const char * name, const char ** pPath) |
| 822 | { |
| 823 | static char shortname[MAX_PATH]; |
| 824 | char * str = shortname; |
| 825 | char c; |
| 826 | char * path; |
| 827 | |
| 828 | if (is_fat_volume (name, &path)) /* truncate to 8.3 */ |
| 829 | { |
| 830 | register int left = 8; /* maximum number of chars in part */ |
| 831 | register int extn = 0; /* extension added? */ |
| 832 | register int dots = 2; /* maximum number of dots allowed */ |
| 833 | |
| 834 | while (name < path) |
| 835 | *str++ = *name++; /* skip past UNC header */ |
| 836 | |
| 837 | while ((c = *name++)) |
| 838 | { |
| 839 | switch ( c ) |
| 840 | { |
| 841 | case '\\': |
| 842 | case '/': |
| 843 | *str++ = '\\'; |
| 844 | extn = 0; /* reset extension flags */ |
| 845 | dots = 2; /* max 2 dots */ |
| 846 | left = 8; /* max length 8 for main part */ |
| 847 | break; |
| 848 | case ':': |
| 849 | *str++ = ':'; |
| 850 | extn = 0; /* reset extension flags */ |
| 851 | dots = 2; /* max 2 dots */ |
| 852 | left = 8; /* max length 8 for main part */ |
| 853 | break; |
| 854 | case '.': |
| 855 | if ( dots ) |
| 856 | { |
| 857 | /* Convert path components of the form .xxx to _xxx, |
| 858 | but leave . and .. as they are. This allows .emacs |
| 859 | to be read as _emacs, for example. */ |
| 860 | |
| 861 | if (! *name || |
| 862 | *name == '.' || |
| 863 | IS_DIRECTORY_SEP (*name)) |
| 864 | { |
| 865 | *str++ = '.'; |
| 866 | dots--; |
| 867 | } |
| 868 | else |
| 869 | { |
| 870 | *str++ = '_'; |
| 871 | left--; |
| 872 | dots = 0; |
| 873 | } |
| 874 | } |
| 875 | else if ( !extn ) |
| 876 | { |
| 877 | *str++ = '.'; |
| 878 | extn = 1; /* we've got an extension */ |
| 879 | left = 3; /* 3 chars in extension */ |
| 880 | } |
| 881 | else |
| 882 | { |
| 883 | /* any embedded dots after the first are converted to _ */ |
| 884 | *str++ = '_'; |
| 885 | } |
| 886 | break; |
| 887 | case '~': |
| 888 | case '#': /* don't lose these, they're important */ |
| 889 | if ( ! left ) |
| 890 | str[-1] = c; /* replace last character of part */ |
| 891 | /* FALLTHRU */ |
| 892 | default: |
| 893 | if ( left ) |
| 894 | { |
| 895 | *str++ = tolower (c); /* map to lower case (looks nicer) */ |
| 896 | left--; |
| 897 | dots = 0; /* started a path component */ |
| 898 | } |
| 899 | break; |
| 900 | } |
| 901 | } |
| 902 | *str = '\0'; |
| 903 | } |
| 904 | else |
| 905 | { |
| 906 | strcpy (shortname, name); |
| 907 | unixtodos_filename (shortname); |
| 908 | } |
| 909 | |
| 910 | if (pPath) |
| 911 | *pPath = shortname + (path - name); |
| 912 | |
| 913 | return shortname; |
| 914 | } |
| 915 | |
| 916 | |
| 917 | /* Shadow some MSVC runtime functions to map requests for long filenames |
| 918 | to reasonable short names if necessary. This was originally added to |
| 919 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support |
| 920 | long file names. */ |
| 921 | |
| 922 | int |
| 923 | sys_access (const char * path, int mode) |
| 924 | { |
| 925 | return _access (map_w32_filename (path, NULL), mode); |
| 926 | } |
| 927 | |
| 928 | int |
| 929 | sys_chdir (const char * path) |
| 930 | { |
| 931 | return _chdir (map_w32_filename (path, NULL)); |
| 932 | } |
| 933 | |
| 934 | int |
| 935 | sys_chmod (const char * path, int mode) |
| 936 | { |
| 937 | return _chmod (map_w32_filename (path, NULL), mode); |
| 938 | } |
| 939 | |
| 940 | int |
| 941 | sys_creat (const char * path, int mode) |
| 942 | { |
| 943 | return _creat (map_w32_filename (path, NULL), mode); |
| 944 | } |
| 945 | |
| 946 | FILE * |
| 947 | sys_fopen(const char * path, const char * mode) |
| 948 | { |
| 949 | int fd; |
| 950 | int oflag; |
| 951 | const char * mode_save = mode; |
| 952 | |
| 953 | /* Force all file handles to be non-inheritable. This is necessary to |
| 954 | ensure child processes don't unwittingly inherit handles that might |
| 955 | prevent future file access. */ |
| 956 | |
| 957 | if (mode[0] == 'r') |
| 958 | oflag = O_RDONLY; |
| 959 | else if (mode[0] == 'w' || mode[0] == 'a') |
| 960 | oflag = O_WRONLY | O_CREAT | O_TRUNC; |
| 961 | else |
| 962 | return NULL; |
| 963 | |
| 964 | /* Only do simplistic option parsing. */ |
| 965 | while (*++mode) |
| 966 | if (mode[0] == '+') |
| 967 | { |
| 968 | oflag &= ~(O_RDONLY | O_WRONLY); |
| 969 | oflag |= O_RDWR; |
| 970 | } |
| 971 | else if (mode[0] == 'b') |
| 972 | { |
| 973 | oflag &= ~O_TEXT; |
| 974 | oflag |= O_BINARY; |
| 975 | } |
| 976 | else if (mode[0] == 't') |
| 977 | { |
| 978 | oflag &= ~O_BINARY; |
| 979 | oflag |= O_TEXT; |
| 980 | } |
| 981 | else break; |
| 982 | |
| 983 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
| 984 | if (fd < 0) |
| 985 | return NULL; |
| 986 | |
| 987 | return fdopen (fd, mode_save); |
| 988 | } |
| 989 | |
| 990 | int |
| 991 | sys_link (const char * path1, const char * path2) |
| 992 | { |
| 993 | errno = EINVAL; |
| 994 | return -1; |
| 995 | } |
| 996 | |
| 997 | int |
| 998 | sys_mkdir (const char * path) |
| 999 | { |
| 1000 | return _mkdir (map_w32_filename (path, NULL)); |
| 1001 | } |
| 1002 | |
| 1003 | /* Because of long name mapping issues, we need to implement this |
| 1004 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate |
| 1005 | a unique name, instead of setting the input template to an empty |
| 1006 | string. |
| 1007 | |
| 1008 | Standard algorithm seems to be use pid or tid with a letter on the |
| 1009 | front (in place of the 6 X's) and cycle through the letters to find a |
| 1010 | unique name. We extend that to allow any reasonable character as the |
| 1011 | first of the 6 X's. */ |
| 1012 | char * |
| 1013 | sys_mktemp (char * template) |
| 1014 | { |
| 1015 | char * p; |
| 1016 | int i; |
| 1017 | unsigned uid = GetCurrentThreadId (); |
| 1018 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; |
| 1019 | |
| 1020 | if (template == NULL) |
| 1021 | return NULL; |
| 1022 | p = template + strlen (template); |
| 1023 | i = 5; |
| 1024 | /* replace up to the last 5 X's with uid in decimal */ |
| 1025 | while (--p >= template && p[0] == 'X' && --i >= 0) |
| 1026 | { |
| 1027 | p[0] = '0' + uid % 10; |
| 1028 | uid /= 10; |
| 1029 | } |
| 1030 | |
| 1031 | if (i < 0 && p[0] == 'X') |
| 1032 | { |
| 1033 | i = 0; |
| 1034 | do |
| 1035 | { |
| 1036 | int save_errno = errno; |
| 1037 | p[0] = first_char[i]; |
| 1038 | if (sys_access (template, 0) < 0) |
| 1039 | { |
| 1040 | errno = save_errno; |
| 1041 | return template; |
| 1042 | } |
| 1043 | } |
| 1044 | while (++i < sizeof (first_char)); |
| 1045 | } |
| 1046 | |
| 1047 | /* Template is badly formed or else we can't generate a unique name, |
| 1048 | so return empty string */ |
| 1049 | template[0] = 0; |
| 1050 | return template; |
| 1051 | } |
| 1052 | |
| 1053 | int |
| 1054 | sys_open (const char * path, int oflag, int mode) |
| 1055 | { |
| 1056 | /* Force all file handles to be non-inheritable. */ |
| 1057 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
| 1058 | } |
| 1059 | |
| 1060 | int |
| 1061 | sys_rename (const char * oldname, const char * newname) |
| 1062 | { |
| 1063 | char temp[MAX_PATH]; |
| 1064 | DWORD attr; |
| 1065 | |
| 1066 | /* MoveFile on Win95 doesn't correctly change the short file name |
| 1067 | alias in a number of circumstances (it is not easy to predict when |
| 1068 | just by looking at oldname and newname, unfortunately). In these |
| 1069 | cases, renaming through a temporary name avoids the problem. |
| 1070 | |
| 1071 | A second problem on Win95 is that renaming through a temp name when |
| 1072 | newname is uppercase fails (the final long name ends up in |
| 1073 | lowercase, although the short alias might be uppercase) UNLESS the |
| 1074 | long temp name is not 8.3. |
| 1075 | |
| 1076 | So, on Win95 we always rename through a temp name, and we make sure |
| 1077 | the temp name has a long extension to ensure correct renaming. */ |
| 1078 | |
| 1079 | strcpy (temp, map_w32_filename (oldname, NULL)); |
| 1080 | |
| 1081 | if (GetVersion () & 0x80000000) |
| 1082 | { |
| 1083 | char * p; |
| 1084 | |
| 1085 | if (p = strrchr (temp, '\\')) |
| 1086 | p++; |
| 1087 | else |
| 1088 | p = temp; |
| 1089 | strcpy (p, "__XXXXXX"); |
| 1090 | sys_mktemp (temp); |
| 1091 | /* Force temp name to require a manufactured 8.3 alias - this |
| 1092 | seems to make the second rename work properly. */ |
| 1093 | strcat (temp, ".long"); |
| 1094 | if (rename (map_w32_filename (oldname, NULL), temp) < 0) |
| 1095 | return -1; |
| 1096 | } |
| 1097 | |
| 1098 | /* Emulate Unix behaviour - newname is deleted if it already exists |
| 1099 | (at least if it is a file; don't do this for directories). |
| 1100 | However, don't do this if we are just changing the case of the file |
| 1101 | name - we will end up deleting the file we are trying to rename! */ |
| 1102 | newname = map_w32_filename (newname, NULL); |
| 1103 | if (stricmp (newname, temp) != 0 |
| 1104 | && (attr = GetFileAttributes (newname)) != -1 |
| 1105 | && (attr & FILE_ATTRIBUTE_DIRECTORY) == 0) |
| 1106 | { |
| 1107 | _chmod (newname, 0666); |
| 1108 | _unlink (newname); |
| 1109 | } |
| 1110 | |
| 1111 | return rename (temp, newname); |
| 1112 | } |
| 1113 | |
| 1114 | int |
| 1115 | sys_rmdir (const char * path) |
| 1116 | { |
| 1117 | return _rmdir (map_w32_filename (path, NULL)); |
| 1118 | } |
| 1119 | |
| 1120 | int |
| 1121 | sys_unlink (const char * path) |
| 1122 | { |
| 1123 | return _unlink (map_w32_filename (path, NULL)); |
| 1124 | } |
| 1125 | |
| 1126 | static FILETIME utc_base_ft; |
| 1127 | static long double utc_base; |
| 1128 | static int init = 0; |
| 1129 | |
| 1130 | static time_t |
| 1131 | convert_time (FILETIME ft) |
| 1132 | { |
| 1133 | long double ret; |
| 1134 | |
| 1135 | if (!init) |
| 1136 | { |
| 1137 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1138 | SYSTEMTIME st; |
| 1139 | |
| 1140 | st.wYear = 1970; |
| 1141 | st.wMonth = 1; |
| 1142 | st.wDay = 1; |
| 1143 | st.wHour = 0; |
| 1144 | st.wMinute = 0; |
| 1145 | st.wSecond = 0; |
| 1146 | st.wMilliseconds = 0; |
| 1147 | |
| 1148 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1149 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1150 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1151 | init = 1; |
| 1152 | } |
| 1153 | |
| 1154 | if (CompareFileTime (&ft, &utc_base_ft) < 0) |
| 1155 | return 0; |
| 1156 | |
| 1157 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; |
| 1158 | ret -= utc_base; |
| 1159 | return (time_t) (ret * 1e-7); |
| 1160 | } |
| 1161 | |
| 1162 | #if 0 |
| 1163 | /* in case we ever have need of this */ |
| 1164 | void |
| 1165 | convert_from_time_t (time_t time, FILETIME * pft) |
| 1166 | { |
| 1167 | long double tmp; |
| 1168 | |
| 1169 | if (!init) |
| 1170 | { |
| 1171 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1172 | SYSTEMTIME st; |
| 1173 | |
| 1174 | st.wYear = 1970; |
| 1175 | st.wMonth = 1; |
| 1176 | st.wDay = 1; |
| 1177 | st.wHour = 0; |
| 1178 | st.wMinute = 0; |
| 1179 | st.wSecond = 0; |
| 1180 | st.wMilliseconds = 0; |
| 1181 | |
| 1182 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1183 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1184 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1185 | init = 1; |
| 1186 | } |
| 1187 | |
| 1188 | /* time in 100ns units since 1-Jan-1601 */ |
| 1189 | tmp = (long double) time * 1e7 + utc_base; |
| 1190 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); |
| 1191 | pft->dwLowDateTime = (DWORD) (tmp - pft->dwHighDateTime); |
| 1192 | } |
| 1193 | #endif |
| 1194 | |
| 1195 | /* "PJW" algorithm (see the "Dragon" compiler book). */ |
| 1196 | static unsigned |
| 1197 | hashval (const char * str) |
| 1198 | { |
| 1199 | unsigned h = 0; |
| 1200 | unsigned g; |
| 1201 | while (*str) |
| 1202 | { |
| 1203 | h = (h << 4) + *str++; |
| 1204 | if ((g = h & 0xf0000000) != 0) |
| 1205 | h = (h ^ (g >> 24)) & 0x0fffffff; |
| 1206 | } |
| 1207 | return h; |
| 1208 | } |
| 1209 | |
| 1210 | /* Return the hash value of the canonical pathname, excluding the |
| 1211 | drive/UNC header, to get a hopefully unique inode number. */ |
| 1212 | static _ino_t |
| 1213 | generate_inode_val (const char * name) |
| 1214 | { |
| 1215 | char fullname[ MAX_PATH ]; |
| 1216 | char * p; |
| 1217 | unsigned hash; |
| 1218 | |
| 1219 | GetFullPathName (name, sizeof (fullname), fullname, &p); |
| 1220 | get_volume_info (fullname, &p); |
| 1221 | /* Normal W32 filesystems are still case insensitive. */ |
| 1222 | _strlwr (p); |
| 1223 | hash = hashval (p); |
| 1224 | return (_ino_t) (hash ^ (hash >> 16)); |
| 1225 | } |
| 1226 | |
| 1227 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
| 1228 | replace it with our own. This also allows us to calculate consistent |
| 1229 | inode values without hacks in the main Emacs code. */ |
| 1230 | int |
| 1231 | stat (const char * path, struct stat * buf) |
| 1232 | { |
| 1233 | char * name; |
| 1234 | WIN32_FIND_DATA wfd; |
| 1235 | HANDLE fh; |
| 1236 | int permission; |
| 1237 | int len; |
| 1238 | int rootdir = FALSE; |
| 1239 | |
| 1240 | if (path == NULL || buf == NULL) |
| 1241 | { |
| 1242 | errno = EFAULT; |
| 1243 | return -1; |
| 1244 | } |
| 1245 | |
| 1246 | name = (char *) map_w32_filename (path, &path); |
| 1247 | /* must be valid filename, no wild cards */ |
| 1248 | if (strchr (name, '*') || strchr (name, '?')) |
| 1249 | { |
| 1250 | errno = ENOENT; |
| 1251 | return -1; |
| 1252 | } |
| 1253 | |
| 1254 | /* Remove trailing directory separator, unless name is the root |
| 1255 | directory of a drive or UNC volume in which case ensure there |
| 1256 | is a trailing separator. */ |
| 1257 | len = strlen (name); |
| 1258 | rootdir = (path >= name + len - 1 |
| 1259 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); |
| 1260 | name = strcpy (alloca (len + 2), name); |
| 1261 | |
| 1262 | if (rootdir) |
| 1263 | { |
| 1264 | if (!IS_DIRECTORY_SEP (name[len-1])) |
| 1265 | strcat (name, "\\"); |
| 1266 | if (GetDriveType (name) < 2) |
| 1267 | { |
| 1268 | errno = ENOENT; |
| 1269 | return -1; |
| 1270 | } |
| 1271 | memset (&wfd, 0, sizeof (wfd)); |
| 1272 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; |
| 1273 | wfd.ftCreationTime = utc_base_ft; |
| 1274 | wfd.ftLastAccessTime = utc_base_ft; |
| 1275 | wfd.ftLastWriteTime = utc_base_ft; |
| 1276 | strcpy (wfd.cFileName, name); |
| 1277 | } |
| 1278 | else |
| 1279 | { |
| 1280 | if (IS_DIRECTORY_SEP (name[len-1])) |
| 1281 | name[len - 1] = 0; |
| 1282 | fh = FindFirstFile (name, &wfd); |
| 1283 | if (fh == INVALID_HANDLE_VALUE) |
| 1284 | { |
| 1285 | errno = ENOENT; |
| 1286 | return -1; |
| 1287 | } |
| 1288 | FindClose (fh); |
| 1289 | } |
| 1290 | |
| 1291 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 1292 | { |
| 1293 | buf->st_mode = _S_IFDIR; |
| 1294 | buf->st_nlink = 2; /* doesn't really matter */ |
| 1295 | } |
| 1296 | else |
| 1297 | { |
| 1298 | #if 0 |
| 1299 | /* This is more accurate in terms of gettting the correct number |
| 1300 | of links, but is quite slow (it is noticable when Emacs is |
| 1301 | making a list of file name completions). */ |
| 1302 | BY_HANDLE_FILE_INFORMATION info; |
| 1303 | |
| 1304 | fh = CreateFile (name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 1305 | NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
| 1306 | |
| 1307 | if (GetFileInformationByHandle (fh, &info)) |
| 1308 | { |
| 1309 | switch (GetFileType (fh)) |
| 1310 | { |
| 1311 | case FILE_TYPE_DISK: |
| 1312 | buf->st_mode = _S_IFREG; |
| 1313 | break; |
| 1314 | case FILE_TYPE_PIPE: |
| 1315 | buf->st_mode = _S_IFIFO; |
| 1316 | break; |
| 1317 | case FILE_TYPE_CHAR: |
| 1318 | case FILE_TYPE_UNKNOWN: |
| 1319 | default: |
| 1320 | buf->st_mode = _S_IFCHR; |
| 1321 | } |
| 1322 | buf->st_nlink = info.nNumberOfLinks; |
| 1323 | /* Could use file index, but this is not guaranteed to be |
| 1324 | unique unless we keep a handle open all the time. */ |
| 1325 | /* buf->st_ino = info.nFileIndexLow ^ info.nFileIndexHigh; */ |
| 1326 | CloseHandle (fh); |
| 1327 | } |
| 1328 | else |
| 1329 | { |
| 1330 | errno = EACCES; |
| 1331 | return -1; |
| 1332 | } |
| 1333 | #else |
| 1334 | buf->st_mode = _S_IFREG; |
| 1335 | buf->st_nlink = 1; |
| 1336 | #endif |
| 1337 | } |
| 1338 | |
| 1339 | /* consider files to belong to current user */ |
| 1340 | buf->st_uid = the_passwd.pw_uid; |
| 1341 | buf->st_gid = the_passwd.pw_gid; |
| 1342 | |
| 1343 | /* volume_info is set indirectly by map_w32_filename */ |
| 1344 | buf->st_dev = volume_info.serialnum; |
| 1345 | buf->st_rdev = volume_info.serialnum; |
| 1346 | |
| 1347 | buf->st_ino = generate_inode_val (name); |
| 1348 | |
| 1349 | buf->st_size = wfd.nFileSizeLow; |
| 1350 | |
| 1351 | /* Convert timestamps to Unix format. */ |
| 1352 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); |
| 1353 | buf->st_atime = convert_time (wfd.ftLastAccessTime); |
| 1354 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 1355 | buf->st_ctime = convert_time (wfd.ftCreationTime); |
| 1356 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 1357 | |
| 1358 | /* determine rwx permissions */ |
| 1359 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 1360 | permission = _S_IREAD; |
| 1361 | else |
| 1362 | permission = _S_IREAD | _S_IWRITE; |
| 1363 | |
| 1364 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 1365 | permission |= _S_IEXEC; |
| 1366 | else |
| 1367 | { |
| 1368 | char * p = strrchr (name, '.'); |
| 1369 | if (p != NULL && |
| 1370 | (stricmp (p, ".exe") == 0 || |
| 1371 | stricmp (p, ".com") == 0 || |
| 1372 | stricmp (p, ".bat") == 0 || |
| 1373 | stricmp (p, ".cmd") == 0)) |
| 1374 | permission |= _S_IEXEC; |
| 1375 | } |
| 1376 | |
| 1377 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 1378 | |
| 1379 | return 0; |
| 1380 | } |
| 1381 | |
| 1382 | #ifdef HAVE_SOCKETS |
| 1383 | |
| 1384 | /* Wrappers for winsock functions to map between our file descriptors |
| 1385 | and winsock's handles; also set h_errno for convenience. |
| 1386 | |
| 1387 | To allow Emacs to run on systems which don't have winsock support |
| 1388 | installed, we dynamically link to winsock on startup if present, and |
| 1389 | otherwise provide the minimum necessary functionality |
| 1390 | (eg. gethostname). */ |
| 1391 | |
| 1392 | /* function pointers for relevant socket functions */ |
| 1393 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); |
| 1394 | void (PASCAL *pfn_WSASetLastError) (int iError); |
| 1395 | int (PASCAL *pfn_WSAGetLastError) (void); |
| 1396 | int (PASCAL *pfn_socket) (int af, int type, int protocol); |
| 1397 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 1398 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 1399 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); |
| 1400 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); |
| 1401 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); |
| 1402 | int (PASCAL *pfn_closesocket) (SOCKET s); |
| 1403 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); |
| 1404 | int (PASCAL *pfn_WSACleanup) (void); |
| 1405 | |
| 1406 | u_short (PASCAL *pfn_htons) (u_short hostshort); |
| 1407 | u_short (PASCAL *pfn_ntohs) (u_short netshort); |
| 1408 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); |
| 1409 | int (PASCAL *pfn_gethostname) (char * name, int namelen); |
| 1410 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); |
| 1411 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); |
| 1412 | |
| 1413 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
| 1414 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); |
| 1415 | #ifndef HANDLE_FLAG_INHERIT |
| 1416 | #define HANDLE_FLAG_INHERIT 1 |
| 1417 | #endif |
| 1418 | |
| 1419 | HANDLE winsock_lib; |
| 1420 | static int winsock_inuse; |
| 1421 | |
| 1422 | BOOL |
| 1423 | term_winsock (void) |
| 1424 | { |
| 1425 | if (winsock_lib != NULL && winsock_inuse == 0) |
| 1426 | { |
| 1427 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
| 1428 | after WSAStartup returns successfully, but it seems reasonable |
| 1429 | to allow unloading winsock anyway in that case. */ |
| 1430 | if (pfn_WSACleanup () == 0 || |
| 1431 | pfn_WSAGetLastError () == WSAENETDOWN) |
| 1432 | { |
| 1433 | if (FreeLibrary (winsock_lib)) |
| 1434 | winsock_lib = NULL; |
| 1435 | return TRUE; |
| 1436 | } |
| 1437 | } |
| 1438 | return FALSE; |
| 1439 | } |
| 1440 | |
| 1441 | BOOL |
| 1442 | init_winsock (int load_now) |
| 1443 | { |
| 1444 | WSADATA winsockData; |
| 1445 | |
| 1446 | if (winsock_lib != NULL) |
| 1447 | return TRUE; |
| 1448 | |
| 1449 | pfn_SetHandleInformation = NULL; |
| 1450 | pfn_SetHandleInformation |
| 1451 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 1452 | "SetHandleInformation"); |
| 1453 | |
| 1454 | winsock_lib = LoadLibrary ("wsock32.dll"); |
| 1455 | |
| 1456 | if (winsock_lib != NULL) |
| 1457 | { |
| 1458 | /* dynamically link to socket functions */ |
| 1459 | |
| 1460 | #define LOAD_PROC(fn) \ |
| 1461 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ |
| 1462 | goto fail; |
| 1463 | |
| 1464 | LOAD_PROC( WSAStartup ); |
| 1465 | LOAD_PROC( WSASetLastError ); |
| 1466 | LOAD_PROC( WSAGetLastError ); |
| 1467 | LOAD_PROC( socket ); |
| 1468 | LOAD_PROC( bind ); |
| 1469 | LOAD_PROC( connect ); |
| 1470 | LOAD_PROC( ioctlsocket ); |
| 1471 | LOAD_PROC( recv ); |
| 1472 | LOAD_PROC( send ); |
| 1473 | LOAD_PROC( closesocket ); |
| 1474 | LOAD_PROC( shutdown ); |
| 1475 | LOAD_PROC( htons ); |
| 1476 | LOAD_PROC( ntohs ); |
| 1477 | LOAD_PROC( inet_addr ); |
| 1478 | LOAD_PROC( gethostname ); |
| 1479 | LOAD_PROC( gethostbyname ); |
| 1480 | LOAD_PROC( getservbyname ); |
| 1481 | LOAD_PROC( WSACleanup ); |
| 1482 | |
| 1483 | #undef LOAD_PROC |
| 1484 | |
| 1485 | /* specify version 1.1 of winsock */ |
| 1486 | if (pfn_WSAStartup (0x101, &winsockData) == 0) |
| 1487 | { |
| 1488 | if (winsockData.wVersion != 0x101) |
| 1489 | goto fail; |
| 1490 | |
| 1491 | if (!load_now) |
| 1492 | { |
| 1493 | /* Report that winsock exists and is usable, but leave |
| 1494 | socket functions disabled. I am assuming that calling |
| 1495 | WSAStartup does not require any network interaction, |
| 1496 | and in particular does not cause or require a dial-up |
| 1497 | connection to be established. */ |
| 1498 | |
| 1499 | pfn_WSACleanup (); |
| 1500 | FreeLibrary (winsock_lib); |
| 1501 | winsock_lib = NULL; |
| 1502 | } |
| 1503 | winsock_inuse = 0; |
| 1504 | return TRUE; |
| 1505 | } |
| 1506 | |
| 1507 | fail: |
| 1508 | FreeLibrary (winsock_lib); |
| 1509 | winsock_lib = NULL; |
| 1510 | } |
| 1511 | |
| 1512 | return FALSE; |
| 1513 | } |
| 1514 | |
| 1515 | |
| 1516 | int h_errno = 0; |
| 1517 | |
| 1518 | /* function to set h_errno for compatability; map winsock error codes to |
| 1519 | normal system codes where they overlap (non-overlapping definitions |
| 1520 | are already in <sys/socket.h> */ |
| 1521 | static void set_errno () |
| 1522 | { |
| 1523 | if (winsock_lib == NULL) |
| 1524 | h_errno = EINVAL; |
| 1525 | else |
| 1526 | h_errno = pfn_WSAGetLastError (); |
| 1527 | |
| 1528 | switch (h_errno) |
| 1529 | { |
| 1530 | case WSAEACCES: h_errno = EACCES; break; |
| 1531 | case WSAEBADF: h_errno = EBADF; break; |
| 1532 | case WSAEFAULT: h_errno = EFAULT; break; |
| 1533 | case WSAEINTR: h_errno = EINTR; break; |
| 1534 | case WSAEINVAL: h_errno = EINVAL; break; |
| 1535 | case WSAEMFILE: h_errno = EMFILE; break; |
| 1536 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; |
| 1537 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; |
| 1538 | } |
| 1539 | errno = h_errno; |
| 1540 | } |
| 1541 | |
| 1542 | static void check_errno () |
| 1543 | { |
| 1544 | if (h_errno == 0 && winsock_lib != NULL) |
| 1545 | pfn_WSASetLastError (0); |
| 1546 | } |
| 1547 | |
| 1548 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
| 1549 | but I believe the method of keeping the socket handle separate (and |
| 1550 | insuring it is not inheritable) is the correct one. */ |
| 1551 | |
| 1552 | //#define SOCK_REPLACE_HANDLE |
| 1553 | |
| 1554 | #ifdef SOCK_REPLACE_HANDLE |
| 1555 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) |
| 1556 | #else |
| 1557 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) |
| 1558 | #endif |
| 1559 | |
| 1560 | int |
| 1561 | sys_socket(int af, int type, int protocol) |
| 1562 | { |
| 1563 | int fd; |
| 1564 | long s; |
| 1565 | child_process * cp; |
| 1566 | |
| 1567 | if (winsock_lib == NULL) |
| 1568 | { |
| 1569 | h_errno = ENETDOWN; |
| 1570 | return INVALID_SOCKET; |
| 1571 | } |
| 1572 | |
| 1573 | check_errno (); |
| 1574 | |
| 1575 | /* call the real socket function */ |
| 1576 | s = (long) pfn_socket (af, type, protocol); |
| 1577 | |
| 1578 | if (s != INVALID_SOCKET) |
| 1579 | { |
| 1580 | /* Although under NT 3.5 _open_osfhandle will accept a socket |
| 1581 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, |
| 1582 | that does not work under NT 3.1. However, we can get the same |
| 1583 | effect by using a backdoor function to replace an existing |
| 1584 | descriptor handle with the one we want. */ |
| 1585 | |
| 1586 | /* allocate a file descriptor (with appropriate flags) */ |
| 1587 | fd = _open ("NUL:", _O_RDWR); |
| 1588 | if (fd >= 0) |
| 1589 | { |
| 1590 | #ifdef SOCK_REPLACE_HANDLE |
| 1591 | /* now replace handle to NUL with our socket handle */ |
| 1592 | CloseHandle ((HANDLE) _get_osfhandle (fd)); |
| 1593 | _free_osfhnd (fd); |
| 1594 | _set_osfhnd (fd, s); |
| 1595 | /* setmode (fd, _O_BINARY); */ |
| 1596 | #else |
| 1597 | /* Make a non-inheritable copy of the socket handle. */ |
| 1598 | { |
| 1599 | HANDLE parent; |
| 1600 | HANDLE new_s = INVALID_HANDLE_VALUE; |
| 1601 | |
| 1602 | parent = GetCurrentProcess (); |
| 1603 | |
| 1604 | /* Apparently there is a bug in NT 3.51 with some service |
| 1605 | packs, which prevents using DuplicateHandle to make a |
| 1606 | socket handle non-inheritable (causes WSACleanup to |
| 1607 | hang). The work-around is to use SetHandleInformation |
| 1608 | instead if it is available and implemented. */ |
| 1609 | if (!pfn_SetHandleInformation |
| 1610 | || !pfn_SetHandleInformation ((HANDLE) s, |
| 1611 | HANDLE_FLAG_INHERIT, |
| 1612 | HANDLE_FLAG_INHERIT)) |
| 1613 | { |
| 1614 | DuplicateHandle (parent, |
| 1615 | (HANDLE) s, |
| 1616 | parent, |
| 1617 | &new_s, |
| 1618 | 0, |
| 1619 | FALSE, |
| 1620 | DUPLICATE_SAME_ACCESS); |
| 1621 | pfn_closesocket (s); |
| 1622 | s = (SOCKET) new_s; |
| 1623 | } |
| 1624 | fd_info[fd].hnd = (HANDLE) s; |
| 1625 | } |
| 1626 | #endif |
| 1627 | |
| 1628 | /* set our own internal flags */ |
| 1629 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; |
| 1630 | |
| 1631 | cp = new_child (); |
| 1632 | if (cp) |
| 1633 | { |
| 1634 | cp->fd = fd; |
| 1635 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 1636 | |
| 1637 | /* attach child_process to fd_info */ |
| 1638 | if (fd_info[ fd ].cp != NULL) |
| 1639 | { |
| 1640 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); |
| 1641 | abort (); |
| 1642 | } |
| 1643 | |
| 1644 | fd_info[ fd ].cp = cp; |
| 1645 | |
| 1646 | /* success! */ |
| 1647 | winsock_inuse++; /* count open sockets */ |
| 1648 | return fd; |
| 1649 | } |
| 1650 | |
| 1651 | /* clean up */ |
| 1652 | _close (fd); |
| 1653 | } |
| 1654 | pfn_closesocket (s); |
| 1655 | h_errno = EMFILE; |
| 1656 | } |
| 1657 | set_errno (); |
| 1658 | |
| 1659 | return -1; |
| 1660 | } |
| 1661 | |
| 1662 | |
| 1663 | int |
| 1664 | sys_bind (int s, const struct sockaddr * addr, int namelen) |
| 1665 | { |
| 1666 | if (winsock_lib == NULL) |
| 1667 | { |
| 1668 | h_errno = ENOTSOCK; |
| 1669 | return SOCKET_ERROR; |
| 1670 | } |
| 1671 | |
| 1672 | check_errno (); |
| 1673 | if (fd_info[s].flags & FILE_SOCKET) |
| 1674 | { |
| 1675 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); |
| 1676 | if (rc == SOCKET_ERROR) |
| 1677 | set_errno (); |
| 1678 | return rc; |
| 1679 | } |
| 1680 | h_errno = ENOTSOCK; |
| 1681 | return SOCKET_ERROR; |
| 1682 | } |
| 1683 | |
| 1684 | |
| 1685 | int |
| 1686 | sys_connect (int s, const struct sockaddr * name, int namelen) |
| 1687 | { |
| 1688 | if (winsock_lib == NULL) |
| 1689 | { |
| 1690 | h_errno = ENOTSOCK; |
| 1691 | return SOCKET_ERROR; |
| 1692 | } |
| 1693 | |
| 1694 | check_errno (); |
| 1695 | if (fd_info[s].flags & FILE_SOCKET) |
| 1696 | { |
| 1697 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); |
| 1698 | if (rc == SOCKET_ERROR) |
| 1699 | set_errno (); |
| 1700 | return rc; |
| 1701 | } |
| 1702 | h_errno = ENOTSOCK; |
| 1703 | return SOCKET_ERROR; |
| 1704 | } |
| 1705 | |
| 1706 | u_short |
| 1707 | sys_htons (u_short hostshort) |
| 1708 | { |
| 1709 | return (winsock_lib != NULL) ? |
| 1710 | pfn_htons (hostshort) : hostshort; |
| 1711 | } |
| 1712 | |
| 1713 | u_short |
| 1714 | sys_ntohs (u_short netshort) |
| 1715 | { |
| 1716 | return (winsock_lib != NULL) ? |
| 1717 | pfn_ntohs (netshort) : netshort; |
| 1718 | } |
| 1719 | |
| 1720 | unsigned long |
| 1721 | sys_inet_addr (const char * cp) |
| 1722 | { |
| 1723 | return (winsock_lib != NULL) ? |
| 1724 | pfn_inet_addr (cp) : INADDR_NONE; |
| 1725 | } |
| 1726 | |
| 1727 | int |
| 1728 | sys_gethostname (char * name, int namelen) |
| 1729 | { |
| 1730 | if (winsock_lib != NULL) |
| 1731 | return pfn_gethostname (name, namelen); |
| 1732 | |
| 1733 | if (namelen > MAX_COMPUTERNAME_LENGTH) |
| 1734 | return !GetComputerName (name, &namelen); |
| 1735 | |
| 1736 | h_errno = EFAULT; |
| 1737 | return SOCKET_ERROR; |
| 1738 | } |
| 1739 | |
| 1740 | struct hostent * |
| 1741 | sys_gethostbyname(const char * name) |
| 1742 | { |
| 1743 | struct hostent * host; |
| 1744 | |
| 1745 | if (winsock_lib == NULL) |
| 1746 | { |
| 1747 | h_errno = ENETDOWN; |
| 1748 | return NULL; |
| 1749 | } |
| 1750 | |
| 1751 | check_errno (); |
| 1752 | host = pfn_gethostbyname (name); |
| 1753 | if (!host) |
| 1754 | set_errno (); |
| 1755 | return host; |
| 1756 | } |
| 1757 | |
| 1758 | struct servent * |
| 1759 | sys_getservbyname(const char * name, const char * proto) |
| 1760 | { |
| 1761 | struct servent * serv; |
| 1762 | |
| 1763 | if (winsock_lib == NULL) |
| 1764 | { |
| 1765 | h_errno = ENETDOWN; |
| 1766 | return NULL; |
| 1767 | } |
| 1768 | |
| 1769 | check_errno (); |
| 1770 | serv = pfn_getservbyname (name, proto); |
| 1771 | if (!serv) |
| 1772 | set_errno (); |
| 1773 | return serv; |
| 1774 | } |
| 1775 | |
| 1776 | #endif /* HAVE_SOCKETS */ |
| 1777 | |
| 1778 | |
| 1779 | /* Shadow main io functions: we need to handle pipes and sockets more |
| 1780 | intelligently, and implement non-blocking mode as well. */ |
| 1781 | |
| 1782 | int |
| 1783 | sys_close (int fd) |
| 1784 | { |
| 1785 | int rc; |
| 1786 | |
| 1787 | if (fd < 0 || fd >= MAXDESC) |
| 1788 | { |
| 1789 | errno = EBADF; |
| 1790 | return -1; |
| 1791 | } |
| 1792 | |
| 1793 | if (fd_info[fd].cp) |
| 1794 | { |
| 1795 | child_process * cp = fd_info[fd].cp; |
| 1796 | |
| 1797 | fd_info[fd].cp = NULL; |
| 1798 | |
| 1799 | if (CHILD_ACTIVE (cp)) |
| 1800 | { |
| 1801 | /* if last descriptor to active child_process then cleanup */ |
| 1802 | int i; |
| 1803 | for (i = 0; i < MAXDESC; i++) |
| 1804 | { |
| 1805 | if (i == fd) |
| 1806 | continue; |
| 1807 | if (fd_info[i].cp == cp) |
| 1808 | break; |
| 1809 | } |
| 1810 | if (i == MAXDESC) |
| 1811 | { |
| 1812 | #ifdef HAVE_SOCKETS |
| 1813 | if (fd_info[fd].flags & FILE_SOCKET) |
| 1814 | { |
| 1815 | #ifndef SOCK_REPLACE_HANDLE |
| 1816 | if (winsock_lib == NULL) abort (); |
| 1817 | |
| 1818 | pfn_shutdown (SOCK_HANDLE (fd), 2); |
| 1819 | rc = pfn_closesocket (SOCK_HANDLE (fd)); |
| 1820 | #endif |
| 1821 | winsock_inuse--; /* count open sockets */ |
| 1822 | } |
| 1823 | #endif |
| 1824 | delete_child (cp); |
| 1825 | } |
| 1826 | } |
| 1827 | } |
| 1828 | |
| 1829 | /* Note that sockets do not need special treatment here (at least on |
| 1830 | NT and Win95 using the standard tcp/ip stacks) - it appears that |
| 1831 | closesocket is equivalent to CloseHandle, which is to be expected |
| 1832 | because socket handles are fully fledged kernel handles. */ |
| 1833 | rc = _close (fd); |
| 1834 | |
| 1835 | if (rc == 0) |
| 1836 | fd_info[fd].flags = 0; |
| 1837 | |
| 1838 | return rc; |
| 1839 | } |
| 1840 | |
| 1841 | int |
| 1842 | sys_dup (int fd) |
| 1843 | { |
| 1844 | int new_fd; |
| 1845 | |
| 1846 | new_fd = _dup (fd); |
| 1847 | if (new_fd >= 0) |
| 1848 | { |
| 1849 | /* duplicate our internal info as well */ |
| 1850 | fd_info[new_fd] = fd_info[fd]; |
| 1851 | } |
| 1852 | return new_fd; |
| 1853 | } |
| 1854 | |
| 1855 | |
| 1856 | int |
| 1857 | sys_dup2 (int src, int dst) |
| 1858 | { |
| 1859 | int rc; |
| 1860 | |
| 1861 | if (dst < 0 || dst >= MAXDESC) |
| 1862 | { |
| 1863 | errno = EBADF; |
| 1864 | return -1; |
| 1865 | } |
| 1866 | |
| 1867 | /* make sure we close the destination first if it's a pipe or socket */ |
| 1868 | if (src != dst && fd_info[dst].flags != 0) |
| 1869 | sys_close (dst); |
| 1870 | |
| 1871 | rc = _dup2 (src, dst); |
| 1872 | if (rc == 0) |
| 1873 | { |
| 1874 | /* duplicate our internal info as well */ |
| 1875 | fd_info[dst] = fd_info[src]; |
| 1876 | } |
| 1877 | return rc; |
| 1878 | } |
| 1879 | |
| 1880 | /* From callproc.c */ |
| 1881 | extern Lisp_Object Vbinary_process_input; |
| 1882 | extern Lisp_Object Vbinary_process_output; |
| 1883 | |
| 1884 | /* Unix pipe() has only one arg */ |
| 1885 | int |
| 1886 | sys_pipe (int * phandles) |
| 1887 | { |
| 1888 | int rc; |
| 1889 | unsigned flags; |
| 1890 | child_process * cp; |
| 1891 | |
| 1892 | /* make pipe handles non-inheritable; when we spawn a child, |
| 1893 | we replace the relevant handle with an inheritable one. */ |
| 1894 | rc = _pipe (phandles, 0, _O_NOINHERIT); |
| 1895 | |
| 1896 | if (rc == 0) |
| 1897 | { |
| 1898 | /* set internal flags, and put read and write handles into binary |
| 1899 | mode as necessary; if not in binary mode, set the MSVC internal |
| 1900 | FDEV (0x40) flag to prevent _read from treating ^Z as eof (this |
| 1901 | could otherwise allow Emacs to hang because it then waits |
| 1902 | indefinitely for the child process to exit, when it might not be |
| 1903 | finished). */ |
| 1904 | flags = FILE_PIPE | FILE_READ; |
| 1905 | if (!NILP (Vbinary_process_output)) |
| 1906 | { |
| 1907 | flags |= FILE_BINARY; |
| 1908 | setmode (phandles[0], _O_BINARY); |
| 1909 | } |
| 1910 | #if (_MSC_VER == 900) |
| 1911 | else |
| 1912 | _osfile[phandles[0]] |= 0x40; |
| 1913 | #endif |
| 1914 | |
| 1915 | fd_info[phandles[0]].flags = flags; |
| 1916 | |
| 1917 | flags = FILE_PIPE | FILE_WRITE; |
| 1918 | if (!NILP (Vbinary_process_input)) |
| 1919 | { |
| 1920 | flags |= FILE_BINARY; |
| 1921 | setmode (phandles[1], _O_BINARY); |
| 1922 | } |
| 1923 | #if (_MSC_VER == 900) |
| 1924 | else |
| 1925 | _osfile[phandles[1]] |= 0x40; |
| 1926 | #endif |
| 1927 | |
| 1928 | fd_info[phandles[1]].flags = flags; |
| 1929 | } |
| 1930 | |
| 1931 | return rc; |
| 1932 | } |
| 1933 | |
| 1934 | /* From ntproc.c */ |
| 1935 | extern Lisp_Object Vw32_pipe_read_delay; |
| 1936 | |
| 1937 | /* Function to do blocking read of one byte, needed to implement |
| 1938 | select. It is only allowed on sockets and pipes. */ |
| 1939 | int |
| 1940 | _sys_read_ahead (int fd) |
| 1941 | { |
| 1942 | child_process * cp; |
| 1943 | int rc; |
| 1944 | |
| 1945 | if (fd < 0 || fd >= MAXDESC) |
| 1946 | return STATUS_READ_ERROR; |
| 1947 | |
| 1948 | cp = fd_info[fd].cp; |
| 1949 | |
| 1950 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 1951 | return STATUS_READ_ERROR; |
| 1952 | |
| 1953 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 |
| 1954 | || (fd_info[fd].flags & FILE_READ) == 0) |
| 1955 | { |
| 1956 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); |
| 1957 | abort (); |
| 1958 | } |
| 1959 | |
| 1960 | cp->status = STATUS_READ_IN_PROGRESS; |
| 1961 | |
| 1962 | if (fd_info[fd].flags & FILE_PIPE) |
| 1963 | { |
| 1964 | /* Use read to get CRLF translation */ |
| 1965 | rc = _read (fd, &cp->chr, sizeof (char)); |
| 1966 | |
| 1967 | /* Give subprocess time to buffer some more output for us before |
| 1968 | reporting that input is available; we need this because Win95 |
| 1969 | connects DOS programs to pipes by making the pipe appear to be |
| 1970 | the normal console stdout - as a result most DOS programs will |
| 1971 | write to stdout without buffering, ie. one character at a |
| 1972 | time. Even some W32 programs do this - "dir" in a command |
| 1973 | shell on NT is very slow if we don't do this. */ |
| 1974 | if (rc > 0) |
| 1975 | { |
| 1976 | int wait = XINT (Vw32_pipe_read_delay); |
| 1977 | |
| 1978 | if (wait > 0) |
| 1979 | Sleep (wait); |
| 1980 | else if (wait < 0) |
| 1981 | while (++wait <= 0) |
| 1982 | /* Yield remainder of our time slice, effectively giving a |
| 1983 | temporary priority boost to the child process. */ |
| 1984 | Sleep (0); |
| 1985 | } |
| 1986 | } |
| 1987 | #ifdef HAVE_SOCKETS |
| 1988 | else if (fd_info[fd].flags & FILE_SOCKET) |
| 1989 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); |
| 1990 | #endif |
| 1991 | |
| 1992 | if (rc == sizeof (char)) |
| 1993 | cp->status = STATUS_READ_SUCCEEDED; |
| 1994 | else |
| 1995 | cp->status = STATUS_READ_FAILED; |
| 1996 | |
| 1997 | return cp->status; |
| 1998 | } |
| 1999 | |
| 2000 | int |
| 2001 | sys_read (int fd, char * buffer, unsigned int count) |
| 2002 | { |
| 2003 | int nchars; |
| 2004 | int extra = 0; |
| 2005 | int to_read; |
| 2006 | DWORD waiting; |
| 2007 | |
| 2008 | if (fd < 0 || fd >= MAXDESC) |
| 2009 | { |
| 2010 | errno = EBADF; |
| 2011 | return -1; |
| 2012 | } |
| 2013 | |
| 2014 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 2015 | { |
| 2016 | child_process *cp = fd_info[fd].cp; |
| 2017 | |
| 2018 | if ((fd_info[fd].flags & FILE_READ) == 0) |
| 2019 | { |
| 2020 | errno = EBADF; |
| 2021 | return -1; |
| 2022 | } |
| 2023 | |
| 2024 | /* presence of a child_process structure means we are operating in |
| 2025 | non-blocking mode - otherwise we just call _read directly. |
| 2026 | Note that the child_process structure might be missing because |
| 2027 | reap_subprocess has been called; in this case the pipe is |
| 2028 | already broken, so calling _read on it is okay. */ |
| 2029 | if (cp) |
| 2030 | { |
| 2031 | int current_status = cp->status; |
| 2032 | |
| 2033 | switch (current_status) |
| 2034 | { |
| 2035 | case STATUS_READ_FAILED: |
| 2036 | case STATUS_READ_ERROR: |
| 2037 | /* report normal EOF */ |
| 2038 | return 0; |
| 2039 | |
| 2040 | case STATUS_READ_READY: |
| 2041 | case STATUS_READ_IN_PROGRESS: |
| 2042 | DebPrint (("sys_read called when read is in progress\n")); |
| 2043 | errno = EWOULDBLOCK; |
| 2044 | return -1; |
| 2045 | |
| 2046 | case STATUS_READ_SUCCEEDED: |
| 2047 | /* consume read-ahead char */ |
| 2048 | *buffer++ = cp->chr; |
| 2049 | count--; |
| 2050 | extra = 1; |
| 2051 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 2052 | ResetEvent (cp->char_avail); |
| 2053 | |
| 2054 | case STATUS_READ_ACKNOWLEDGED: |
| 2055 | break; |
| 2056 | |
| 2057 | default: |
| 2058 | DebPrint (("sys_read: bad status %d\n", current_status)); |
| 2059 | errno = EBADF; |
| 2060 | return -1; |
| 2061 | } |
| 2062 | |
| 2063 | if (fd_info[fd].flags & FILE_PIPE) |
| 2064 | { |
| 2065 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); |
| 2066 | to_read = min (waiting, (DWORD) count); |
| 2067 | |
| 2068 | /* Use read to get CRLF translation */ |
| 2069 | nchars = _read (fd, buffer, to_read); |
| 2070 | } |
| 2071 | #ifdef HAVE_SOCKETS |
| 2072 | else /* FILE_SOCKET */ |
| 2073 | { |
| 2074 | if (winsock_lib == NULL) abort (); |
| 2075 | |
| 2076 | /* do the equivalent of a non-blocking read */ |
| 2077 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); |
| 2078 | if (waiting == 0 && extra == 0) |
| 2079 | { |
| 2080 | h_errno = errno = EWOULDBLOCK; |
| 2081 | return -1; |
| 2082 | } |
| 2083 | |
| 2084 | nchars = 0; |
| 2085 | if (waiting) |
| 2086 | { |
| 2087 | /* always use binary mode for sockets */ |
| 2088 | nchars = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
| 2089 | if (nchars == SOCKET_ERROR) |
| 2090 | { |
| 2091 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", |
| 2092 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 2093 | if (extra == 0) |
| 2094 | { |
| 2095 | set_errno (); |
| 2096 | return -1; |
| 2097 | } |
| 2098 | nchars = 0; |
| 2099 | } |
| 2100 | } |
| 2101 | } |
| 2102 | #endif |
| 2103 | } |
| 2104 | else |
| 2105 | nchars = _read (fd, buffer, count); |
| 2106 | } |
| 2107 | else |
| 2108 | nchars = _read (fd, buffer, count); |
| 2109 | |
| 2110 | return nchars + extra; |
| 2111 | } |
| 2112 | |
| 2113 | /* For now, don't bother with a non-blocking mode */ |
| 2114 | int |
| 2115 | sys_write (int fd, const void * buffer, unsigned int count) |
| 2116 | { |
| 2117 | int nchars; |
| 2118 | |
| 2119 | if (fd < 0 || fd >= MAXDESC) |
| 2120 | { |
| 2121 | errno = EBADF; |
| 2122 | return -1; |
| 2123 | } |
| 2124 | |
| 2125 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 2126 | if ((fd_info[fd].flags & FILE_WRITE) == 0) |
| 2127 | { |
| 2128 | errno = EBADF; |
| 2129 | return -1; |
| 2130 | } |
| 2131 | #ifdef HAVE_SOCKETS |
| 2132 | if (fd_info[fd].flags & FILE_SOCKET) |
| 2133 | { |
| 2134 | if (winsock_lib == NULL) abort (); |
| 2135 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
| 2136 | if (nchars == SOCKET_ERROR) |
| 2137 | { |
| 2138 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", |
| 2139 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 2140 | set_errno (); |
| 2141 | } |
| 2142 | } |
| 2143 | else |
| 2144 | #endif |
| 2145 | nchars = _write (fd, buffer, count); |
| 2146 | |
| 2147 | return nchars; |
| 2148 | } |
| 2149 | |
| 2150 | |
| 2151 | void |
| 2152 | term_ntproc () |
| 2153 | { |
| 2154 | #ifdef HAVE_SOCKETS |
| 2155 | /* shutdown the socket interface if necessary */ |
| 2156 | term_winsock (); |
| 2157 | #endif |
| 2158 | } |
| 2159 | |
| 2160 | extern BOOL dos_process_running; |
| 2161 | |
| 2162 | void |
| 2163 | init_ntproc () |
| 2164 | { |
| 2165 | #ifdef HAVE_SOCKETS |
| 2166 | /* Initialise the socket interface now if available and requested by |
| 2167 | the user by defining PRELOAD_WINSOCK; otherwise loading will be |
| 2168 | delayed until open-network-stream is called (w32-has-winsock can |
| 2169 | also be used to dynamically load or reload winsock). |
| 2170 | |
| 2171 | Conveniently, init_environment is called before us, so |
| 2172 | PRELOAD_WINSOCK can be set in the registry. */ |
| 2173 | |
| 2174 | /* Always initialize this correctly. */ |
| 2175 | winsock_lib = NULL; |
| 2176 | |
| 2177 | if (getenv ("PRELOAD_WINSOCK") != NULL) |
| 2178 | init_winsock (TRUE); |
| 2179 | #endif |
| 2180 | |
| 2181 | /* Initial preparation for subprocess support: replace our standard |
| 2182 | handles with non-inheritable versions. */ |
| 2183 | { |
| 2184 | HANDLE parent; |
| 2185 | HANDLE stdin_save = INVALID_HANDLE_VALUE; |
| 2186 | HANDLE stdout_save = INVALID_HANDLE_VALUE; |
| 2187 | HANDLE stderr_save = INVALID_HANDLE_VALUE; |
| 2188 | |
| 2189 | parent = GetCurrentProcess (); |
| 2190 | |
| 2191 | /* ignore errors when duplicating and closing; typically the |
| 2192 | handles will be invalid when running as a gui program. */ |
| 2193 | DuplicateHandle (parent, |
| 2194 | GetStdHandle (STD_INPUT_HANDLE), |
| 2195 | parent, |
| 2196 | &stdin_save, |
| 2197 | 0, |
| 2198 | FALSE, |
| 2199 | DUPLICATE_SAME_ACCESS); |
| 2200 | |
| 2201 | DuplicateHandle (parent, |
| 2202 | GetStdHandle (STD_OUTPUT_HANDLE), |
| 2203 | parent, |
| 2204 | &stdout_save, |
| 2205 | 0, |
| 2206 | FALSE, |
| 2207 | DUPLICATE_SAME_ACCESS); |
| 2208 | |
| 2209 | DuplicateHandle (parent, |
| 2210 | GetStdHandle (STD_ERROR_HANDLE), |
| 2211 | parent, |
| 2212 | &stderr_save, |
| 2213 | 0, |
| 2214 | FALSE, |
| 2215 | DUPLICATE_SAME_ACCESS); |
| 2216 | |
| 2217 | fclose (stdin); |
| 2218 | fclose (stdout); |
| 2219 | fclose (stderr); |
| 2220 | |
| 2221 | if (stdin_save != INVALID_HANDLE_VALUE) |
| 2222 | _open_osfhandle ((long) stdin_save, O_TEXT); |
| 2223 | else |
| 2224 | open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
| 2225 | fdopen (0, "r"); |
| 2226 | |
| 2227 | if (stdout_save != INVALID_HANDLE_VALUE) |
| 2228 | _open_osfhandle ((long) stdout_save, O_TEXT); |
| 2229 | else |
| 2230 | open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 2231 | fdopen (1, "w"); |
| 2232 | |
| 2233 | if (stderr_save != INVALID_HANDLE_VALUE) |
| 2234 | _open_osfhandle ((long) stderr_save, O_TEXT); |
| 2235 | else |
| 2236 | open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 2237 | fdopen (2, "w"); |
| 2238 | } |
| 2239 | |
| 2240 | /* Restrict Emacs to running only one DOS program at a time (with any |
| 2241 | number of W32 programs). This is to prevent the user from |
| 2242 | running into problems with DOS programs being run in the same VDM |
| 2243 | under both Windows 95 and Windows NT. |
| 2244 | |
| 2245 | Note that it is possible for Emacs to run DOS programs in separate |
| 2246 | VDMs, but unfortunately the pipe implementation on Windows 95 then |
| 2247 | fails to report when the DOS process exits (which is supposed to |
| 2248 | break the pipe). Until this bug is fixed, or we can devise a |
| 2249 | work-around, we must try to avoid letting the user start more than |
| 2250 | one DOS program if possible. */ |
| 2251 | |
| 2252 | dos_process_running = FALSE; |
| 2253 | |
| 2254 | /* unfortunately, atexit depends on implementation of malloc */ |
| 2255 | /* atexit (term_ntproc); */ |
| 2256 | signal (SIGABRT, term_ntproc); |
| 2257 | } |
| 2258 | |
| 2259 | /* end of nt.c */ |