| 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
| 2 | Copyright (C) 1994, 1995, 2000, 2001 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. |
| 20 | |
| 21 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | #include <stddef.h> /* for offsetof */ |
| 26 | #include <stdlib.h> |
| 27 | #include <stdio.h> |
| 28 | #include <io.h> |
| 29 | #include <errno.h> |
| 30 | #include <fcntl.h> |
| 31 | #include <ctype.h> |
| 32 | #include <signal.h> |
| 33 | #include <sys/file.h> |
| 34 | #include <sys/time.h> |
| 35 | #include <sys/utime.h> |
| 36 | |
| 37 | /* must include CRT headers *before* config.h */ |
| 38 | |
| 39 | #ifdef HAVE_CONFIG_H |
| 40 | #include <config.h> |
| 41 | #endif |
| 42 | |
| 43 | #undef access |
| 44 | #undef chdir |
| 45 | #undef chmod |
| 46 | #undef creat |
| 47 | #undef ctime |
| 48 | #undef fopen |
| 49 | #undef link |
| 50 | #undef mkdir |
| 51 | #undef mktemp |
| 52 | #undef open |
| 53 | #undef rename |
| 54 | #undef rmdir |
| 55 | #undef unlink |
| 56 | |
| 57 | #undef close |
| 58 | #undef dup |
| 59 | #undef dup2 |
| 60 | #undef pipe |
| 61 | #undef read |
| 62 | #undef write |
| 63 | |
| 64 | #undef strerror |
| 65 | |
| 66 | #include "lisp.h" |
| 67 | |
| 68 | #include <pwd.h> |
| 69 | |
| 70 | #ifdef __GNUC__ |
| 71 | #define _ANONYMOUS_UNION |
| 72 | #define _ANONYMOUS_STRUCT |
| 73 | #endif |
| 74 | #include <windows.h> |
| 75 | |
| 76 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 77 | #include <sys/socket.h> |
| 78 | #undef socket |
| 79 | #undef bind |
| 80 | #undef connect |
| 81 | #undef htons |
| 82 | #undef ntohs |
| 83 | #undef inet_addr |
| 84 | #undef gethostname |
| 85 | #undef gethostbyname |
| 86 | #undef getservbyname |
| 87 | #undef getpeername |
| 88 | #undef shutdown |
| 89 | #undef setsockopt |
| 90 | #undef listen |
| 91 | #undef getsockname |
| 92 | #undef accept |
| 93 | #undef recvfrom |
| 94 | #undef sendto |
| 95 | #endif |
| 96 | |
| 97 | #include "w32.h" |
| 98 | #include "ndir.h" |
| 99 | #include "w32heap.h" |
| 100 | #include "systime.h" |
| 101 | |
| 102 | extern Lisp_Object Vw32_downcase_file_names; |
| 103 | extern Lisp_Object Vw32_generate_fake_inodes; |
| 104 | extern Lisp_Object Vw32_get_true_file_attributes; |
| 105 | extern Lisp_Object Vw32_num_mouse_buttons; |
| 106 | |
| 107 | \f |
| 108 | /* Equivalent of strerror for W32 error codes. */ |
| 109 | char * |
| 110 | w32_strerror (int error_no) |
| 111 | { |
| 112 | static char buf[500]; |
| 113 | |
| 114 | if (error_no == 0) |
| 115 | error_no = GetLastError (); |
| 116 | |
| 117 | buf[0] = '\0'; |
| 118 | if (!FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, |
| 119 | error_no, |
| 120 | 0, /* choose most suitable language */ |
| 121 | buf, sizeof (buf), NULL)) |
| 122 | sprintf (buf, "w32 error %u", error_no); |
| 123 | return buf; |
| 124 | } |
| 125 | |
| 126 | static char startup_dir[MAXPATHLEN]; |
| 127 | |
| 128 | /* Get the current working directory. */ |
| 129 | char * |
| 130 | getwd (char *dir) |
| 131 | { |
| 132 | #if 0 |
| 133 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
| 134 | return dir; |
| 135 | return NULL; |
| 136 | #else |
| 137 | /* Emacs doesn't actually change directory itself, and we want to |
| 138 | force our real wd to be where emacs.exe is to avoid unnecessary |
| 139 | conflicts when trying to rename or delete directories. */ |
| 140 | strcpy (dir, startup_dir); |
| 141 | return dir; |
| 142 | #endif |
| 143 | } |
| 144 | |
| 145 | #ifndef HAVE_SOCKETS |
| 146 | /* Emulate gethostname. */ |
| 147 | int |
| 148 | gethostname (char *buffer, int size) |
| 149 | { |
| 150 | /* NT only allows small host names, so the buffer is |
| 151 | certainly large enough. */ |
| 152 | return !GetComputerName (buffer, &size); |
| 153 | } |
| 154 | #endif /* HAVE_SOCKETS */ |
| 155 | |
| 156 | /* Emulate getloadavg. */ |
| 157 | int |
| 158 | getloadavg (double loadavg[], int nelem) |
| 159 | { |
| 160 | int i; |
| 161 | |
| 162 | /* A faithful emulation is going to have to be saved for a rainy day. */ |
| 163 | for (i = 0; i < nelem; i++) |
| 164 | { |
| 165 | loadavg[i] = 0.0; |
| 166 | } |
| 167 | return i; |
| 168 | } |
| 169 | |
| 170 | /* Emulate getpwuid, getpwnam and others. */ |
| 171 | |
| 172 | #define PASSWD_FIELD_SIZE 256 |
| 173 | |
| 174 | static char the_passwd_name[PASSWD_FIELD_SIZE]; |
| 175 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; |
| 176 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; |
| 177 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; |
| 178 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; |
| 179 | |
| 180 | static struct passwd the_passwd = |
| 181 | { |
| 182 | the_passwd_name, |
| 183 | the_passwd_passwd, |
| 184 | 0, |
| 185 | 0, |
| 186 | 0, |
| 187 | the_passwd_gecos, |
| 188 | the_passwd_dir, |
| 189 | the_passwd_shell, |
| 190 | }; |
| 191 | |
| 192 | int |
| 193 | getuid () |
| 194 | { |
| 195 | return the_passwd.pw_uid; |
| 196 | } |
| 197 | |
| 198 | int |
| 199 | geteuid () |
| 200 | { |
| 201 | /* I could imagine arguing for checking to see whether the user is |
| 202 | in the Administrators group and returning a UID of 0 for that |
| 203 | case, but I don't know how wise that would be in the long run. */ |
| 204 | return getuid (); |
| 205 | } |
| 206 | |
| 207 | int |
| 208 | getgid () |
| 209 | { |
| 210 | return the_passwd.pw_gid; |
| 211 | } |
| 212 | |
| 213 | int |
| 214 | getegid () |
| 215 | { |
| 216 | return getgid (); |
| 217 | } |
| 218 | |
| 219 | struct passwd * |
| 220 | getpwuid (int uid) |
| 221 | { |
| 222 | if (uid == the_passwd.pw_uid) |
| 223 | return &the_passwd; |
| 224 | return NULL; |
| 225 | } |
| 226 | |
| 227 | struct passwd * |
| 228 | getpwnam (char *name) |
| 229 | { |
| 230 | struct passwd *pw; |
| 231 | |
| 232 | pw = getpwuid (getuid ()); |
| 233 | if (!pw) |
| 234 | return pw; |
| 235 | |
| 236 | if (stricmp (name, pw->pw_name)) |
| 237 | return NULL; |
| 238 | |
| 239 | return pw; |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | init_user_info () |
| 244 | { |
| 245 | /* Find the user's real name by opening the process token and |
| 246 | looking up the name associated with the user-sid in that token. |
| 247 | |
| 248 | Use the relative portion of the identifier authority value from |
| 249 | the user-sid as the user id value (same for group id using the |
| 250 | primary group sid from the process token). */ |
| 251 | |
| 252 | char user_sid[256], name[256], domain[256]; |
| 253 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; |
| 254 | HANDLE token = NULL; |
| 255 | SID_NAME_USE user_type; |
| 256 | |
| 257 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) |
| 258 | && GetTokenInformation (token, TokenUser, |
| 259 | (PVOID) user_sid, sizeof (user_sid), &trash) |
| 260 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, |
| 261 | domain, &dlength, &user_type)) |
| 262 | { |
| 263 | strcpy (the_passwd.pw_name, name); |
| 264 | /* Determine a reasonable uid value. */ |
| 265 | if (stricmp ("administrator", name) == 0) |
| 266 | { |
| 267 | the_passwd.pw_uid = 0; |
| 268 | the_passwd.pw_gid = 0; |
| 269 | } |
| 270 | else |
| 271 | { |
| 272 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 273 | |
| 274 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 275 | /* I believe the relative portion is the last 4 bytes (of 6) |
| 276 | with msb first. */ |
| 277 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + |
| 278 | (pSIA->Value[3] << 16) + |
| 279 | (pSIA->Value[4] << 8) + |
| 280 | (pSIA->Value[5] << 0)); |
| 281 | /* restrict to conventional uid range for normal users */ |
| 282 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; |
| 283 | |
| 284 | /* Get group id */ |
| 285 | if (GetTokenInformation (token, TokenPrimaryGroup, |
| 286 | (PVOID) user_sid, sizeof (user_sid), &trash)) |
| 287 | { |
| 288 | SID_IDENTIFIER_AUTHORITY * pSIA; |
| 289 | |
| 290 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); |
| 291 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + |
| 292 | (pSIA->Value[3] << 16) + |
| 293 | (pSIA->Value[4] << 8) + |
| 294 | (pSIA->Value[5] << 0)); |
| 295 | /* I don't know if this is necessary, but for safety... */ |
| 296 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; |
| 297 | } |
| 298 | else |
| 299 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 300 | } |
| 301 | } |
| 302 | /* If security calls are not supported (presumably because we |
| 303 | are running under Windows 95), fallback to this. */ |
| 304 | else if (GetUserName (name, &length)) |
| 305 | { |
| 306 | strcpy (the_passwd.pw_name, name); |
| 307 | if (stricmp ("administrator", name) == 0) |
| 308 | the_passwd.pw_uid = 0; |
| 309 | else |
| 310 | the_passwd.pw_uid = 123; |
| 311 | the_passwd.pw_gid = the_passwd.pw_uid; |
| 312 | } |
| 313 | else |
| 314 | { |
| 315 | strcpy (the_passwd.pw_name, "unknown"); |
| 316 | the_passwd.pw_uid = 123; |
| 317 | the_passwd.pw_gid = 123; |
| 318 | } |
| 319 | |
| 320 | /* Ensure HOME and SHELL are defined. */ |
| 321 | if (getenv ("HOME") == NULL) |
| 322 | abort (); |
| 323 | if (getenv ("SHELL") == NULL) |
| 324 | abort (); |
| 325 | |
| 326 | /* Set dir and shell from environment variables. */ |
| 327 | strcpy (the_passwd.pw_dir, getenv ("HOME")); |
| 328 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); |
| 329 | |
| 330 | if (token) |
| 331 | CloseHandle (token); |
| 332 | } |
| 333 | |
| 334 | int |
| 335 | random () |
| 336 | { |
| 337 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
| 338 | return ((rand () << 15) | rand ()); |
| 339 | } |
| 340 | |
| 341 | void |
| 342 | srandom (int seed) |
| 343 | { |
| 344 | srand (seed); |
| 345 | } |
| 346 | |
| 347 | |
| 348 | /* Normalize filename by converting all path separators to |
| 349 | the specified separator. Also conditionally convert upper |
| 350 | case path name components to lower case. */ |
| 351 | |
| 352 | static void |
| 353 | normalize_filename (fp, path_sep) |
| 354 | register char *fp; |
| 355 | char path_sep; |
| 356 | { |
| 357 | char sep; |
| 358 | char *elem; |
| 359 | |
| 360 | /* Always lower-case drive letters a-z, even if the filesystem |
| 361 | preserves case in filenames. |
| 362 | This is so filenames can be compared by string comparison |
| 363 | functions that are case-sensitive. Even case-preserving filesystems |
| 364 | do not distinguish case in drive letters. */ |
| 365 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') |
| 366 | { |
| 367 | *fp += 'a' - 'A'; |
| 368 | fp += 2; |
| 369 | } |
| 370 | |
| 371 | if (NILP (Vw32_downcase_file_names)) |
| 372 | { |
| 373 | while (*fp) |
| 374 | { |
| 375 | if (*fp == '/' || *fp == '\\') |
| 376 | *fp = path_sep; |
| 377 | fp++; |
| 378 | } |
| 379 | return; |
| 380 | } |
| 381 | |
| 382 | sep = path_sep; /* convert to this path separator */ |
| 383 | elem = fp; /* start of current path element */ |
| 384 | |
| 385 | do { |
| 386 | if (*fp >= 'a' && *fp <= 'z') |
| 387 | elem = 0; /* don't convert this element */ |
| 388 | |
| 389 | if (*fp == 0 || *fp == ':') |
| 390 | { |
| 391 | sep = *fp; /* restore current separator (or 0) */ |
| 392 | *fp = '/'; /* after conversion of this element */ |
| 393 | } |
| 394 | |
| 395 | if (*fp == '/' || *fp == '\\') |
| 396 | { |
| 397 | if (elem && elem != fp) |
| 398 | { |
| 399 | *fp = 0; /* temporary end of string */ |
| 400 | _strlwr (elem); /* while we convert to lower case */ |
| 401 | } |
| 402 | *fp = sep; /* convert (or restore) path separator */ |
| 403 | elem = fp + 1; /* next element starts after separator */ |
| 404 | sep = path_sep; |
| 405 | } |
| 406 | } while (*fp++); |
| 407 | } |
| 408 | |
| 409 | /* Destructively turn backslashes into slashes. */ |
| 410 | void |
| 411 | dostounix_filename (p) |
| 412 | register char *p; |
| 413 | { |
| 414 | normalize_filename (p, '/'); |
| 415 | } |
| 416 | |
| 417 | /* Destructively turn slashes into backslashes. */ |
| 418 | void |
| 419 | unixtodos_filename (p) |
| 420 | register char *p; |
| 421 | { |
| 422 | normalize_filename (p, '\\'); |
| 423 | } |
| 424 | |
| 425 | /* Remove all CR's that are followed by a LF. |
| 426 | (From msdos.c...probably should figure out a way to share it, |
| 427 | although this code isn't going to ever change.) */ |
| 428 | int |
| 429 | crlf_to_lf (n, buf) |
| 430 | register int n; |
| 431 | register unsigned char *buf; |
| 432 | { |
| 433 | unsigned char *np = buf; |
| 434 | unsigned char *startp = buf; |
| 435 | unsigned char *endp = buf + n; |
| 436 | |
| 437 | if (n == 0) |
| 438 | return n; |
| 439 | while (buf < endp - 1) |
| 440 | { |
| 441 | if (*buf == 0x0d) |
| 442 | { |
| 443 | if (*(++buf) != 0x0a) |
| 444 | *np++ = 0x0d; |
| 445 | } |
| 446 | else |
| 447 | *np++ = *buf++; |
| 448 | } |
| 449 | if (buf < endp) |
| 450 | *np++ = *buf++; |
| 451 | return np - startp; |
| 452 | } |
| 453 | |
| 454 | /* Parse the root part of file name, if present. Return length and |
| 455 | optionally store pointer to char after root. */ |
| 456 | static int |
| 457 | parse_root (char * name, char ** pPath) |
| 458 | { |
| 459 | char * start = name; |
| 460 | |
| 461 | if (name == NULL) |
| 462 | return 0; |
| 463 | |
| 464 | /* find the root name of the volume if given */ |
| 465 | if (isalpha (name[0]) && name[1] == ':') |
| 466 | { |
| 467 | /* skip past drive specifier */ |
| 468 | name += 2; |
| 469 | if (IS_DIRECTORY_SEP (name[0])) |
| 470 | name++; |
| 471 | } |
| 472 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 473 | { |
| 474 | int slashes = 2; |
| 475 | name += 2; |
| 476 | do |
| 477 | { |
| 478 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 479 | break; |
| 480 | name++; |
| 481 | } |
| 482 | while ( *name ); |
| 483 | if (IS_DIRECTORY_SEP (name[0])) |
| 484 | name++; |
| 485 | } |
| 486 | |
| 487 | if (pPath) |
| 488 | *pPath = name; |
| 489 | |
| 490 | return name - start; |
| 491 | } |
| 492 | |
| 493 | /* Get long base name for name; name is assumed to be absolute. */ |
| 494 | static int |
| 495 | get_long_basename (char * name, char * buf, int size) |
| 496 | { |
| 497 | WIN32_FIND_DATA find_data; |
| 498 | HANDLE dir_handle; |
| 499 | int len = 0; |
| 500 | |
| 501 | /* must be valid filename, no wild cards or other invalid characters */ |
| 502 | if (strpbrk (name, "*?|<>\"")) |
| 503 | return 0; |
| 504 | |
| 505 | dir_handle = FindFirstFile (name, &find_data); |
| 506 | if (dir_handle != INVALID_HANDLE_VALUE) |
| 507 | { |
| 508 | if ((len = strlen (find_data.cFileName)) < size) |
| 509 | memcpy (buf, find_data.cFileName, len + 1); |
| 510 | else |
| 511 | len = 0; |
| 512 | FindClose (dir_handle); |
| 513 | } |
| 514 | return len; |
| 515 | } |
| 516 | |
| 517 | /* Get long name for file, if possible (assumed to be absolute). */ |
| 518 | BOOL |
| 519 | w32_get_long_filename (char * name, char * buf, int size) |
| 520 | { |
| 521 | char * o = buf; |
| 522 | char * p; |
| 523 | char * q; |
| 524 | char full[ MAX_PATH ]; |
| 525 | int len; |
| 526 | |
| 527 | len = strlen (name); |
| 528 | if (len >= MAX_PATH) |
| 529 | return FALSE; |
| 530 | |
| 531 | /* Use local copy for destructive modification. */ |
| 532 | memcpy (full, name, len+1); |
| 533 | unixtodos_filename (full); |
| 534 | |
| 535 | /* Copy root part verbatim. */ |
| 536 | len = parse_root (full, &p); |
| 537 | memcpy (o, full, len); |
| 538 | o += len; |
| 539 | *o = '\0'; |
| 540 | size -= len; |
| 541 | |
| 542 | while (p != NULL && *p) |
| 543 | { |
| 544 | q = p; |
| 545 | p = strchr (q, '\\'); |
| 546 | if (p) *p = '\0'; |
| 547 | len = get_long_basename (full, o, size); |
| 548 | if (len > 0) |
| 549 | { |
| 550 | o += len; |
| 551 | size -= len; |
| 552 | if (p != NULL) |
| 553 | { |
| 554 | *p++ = '\\'; |
| 555 | if (size < 2) |
| 556 | return FALSE; |
| 557 | *o++ = '\\'; |
| 558 | size--; |
| 559 | *o = '\0'; |
| 560 | } |
| 561 | } |
| 562 | else |
| 563 | return FALSE; |
| 564 | } |
| 565 | |
| 566 | return TRUE; |
| 567 | } |
| 568 | |
| 569 | int |
| 570 | is_unc_volume (const char *filename) |
| 571 | { |
| 572 | const char *ptr = filename; |
| 573 | |
| 574 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) |
| 575 | return 0; |
| 576 | |
| 577 | if (strpbrk (ptr + 2, "*?|<>\"\\/")) |
| 578 | return 0; |
| 579 | |
| 580 | return 1; |
| 581 | } |
| 582 | |
| 583 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
| 584 | |
| 585 | int |
| 586 | sigsetmask (int signal_mask) |
| 587 | { |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | int |
| 592 | sigmask (int sig) |
| 593 | { |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | int |
| 598 | sigblock (int sig) |
| 599 | { |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | int |
| 604 | sigunblock (int sig) |
| 605 | { |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | int |
| 610 | setpgrp (int pid, int gid) |
| 611 | { |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | int |
| 616 | alarm (int seconds) |
| 617 | { |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | void |
| 622 | unrequest_sigio (void) |
| 623 | { |
| 624 | return; |
| 625 | } |
| 626 | |
| 627 | void |
| 628 | request_sigio (void) |
| 629 | { |
| 630 | return; |
| 631 | } |
| 632 | |
| 633 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
| 634 | |
| 635 | LPBYTE |
| 636 | w32_get_resource (key, lpdwtype) |
| 637 | char *key; |
| 638 | LPDWORD lpdwtype; |
| 639 | { |
| 640 | LPBYTE lpvalue; |
| 641 | HKEY hrootkey = NULL; |
| 642 | DWORD cbData; |
| 643 | BOOL ok = FALSE; |
| 644 | |
| 645 | /* Check both the current user and the local machine to see if |
| 646 | we have any resources. */ |
| 647 | |
| 648 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 649 | { |
| 650 | lpvalue = NULL; |
| 651 | |
| 652 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 653 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 654 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 655 | { |
| 656 | return (lpvalue); |
| 657 | } |
| 658 | |
| 659 | if (lpvalue) xfree (lpvalue); |
| 660 | |
| 661 | RegCloseKey (hrootkey); |
| 662 | } |
| 663 | |
| 664 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) |
| 665 | { |
| 666 | lpvalue = NULL; |
| 667 | |
| 668 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
| 669 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL |
| 670 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) |
| 671 | { |
| 672 | return (lpvalue); |
| 673 | } |
| 674 | |
| 675 | if (lpvalue) xfree (lpvalue); |
| 676 | |
| 677 | RegCloseKey (hrootkey); |
| 678 | } |
| 679 | |
| 680 | return (NULL); |
| 681 | } |
| 682 | |
| 683 | char *get_emacs_configuration (void); |
| 684 | extern Lisp_Object Vsystem_configuration; |
| 685 | |
| 686 | void |
| 687 | init_environment (char ** argv) |
| 688 | { |
| 689 | static const char * const tempdirs[] = { |
| 690 | "$TMPDIR", "$TEMP", "$TMP", "c:/" |
| 691 | }; |
| 692 | int i; |
| 693 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); |
| 694 | |
| 695 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use |
| 696 | temporary files and assume "/tmp" if $TMPDIR is unset, which |
| 697 | will break on DOS/Windows. Refuse to work if we cannot find |
| 698 | a directory, not even "c:/", usable for that purpose. */ |
| 699 | for (i = 0; i < imax ; i++) |
| 700 | { |
| 701 | const char *tmp = tempdirs[i]; |
| 702 | |
| 703 | if (*tmp == '$') |
| 704 | tmp = getenv (tmp + 1); |
| 705 | /* Note that `access' can lie to us if the directory resides on a |
| 706 | read-only filesystem, like CD-ROM or a write-protected floppy. |
| 707 | The only way to be really sure is to actually create a file and |
| 708 | see if it succeeds. But I think that's too much to ask. */ |
| 709 | if (tmp && _access (tmp, D_OK) == 0) |
| 710 | { |
| 711 | char * var = alloca (strlen (tmp) + 8); |
| 712 | sprintf (var, "TMPDIR=%s", tmp); |
| 713 | _putenv (strdup (var)); |
| 714 | break; |
| 715 | } |
| 716 | } |
| 717 | if (i >= imax) |
| 718 | cmd_error_internal |
| 719 | (Fcons (Qerror, |
| 720 | Fcons (build_string ("no usable temporary directories found!!"), |
| 721 | Qnil)), |
| 722 | "While setting TMPDIR: "); |
| 723 | |
| 724 | /* Check for environment variables and use registry settings if they |
| 725 | don't exist. Fallback on default values where applicable. */ |
| 726 | { |
| 727 | int i; |
| 728 | LPBYTE lpval; |
| 729 | DWORD dwType; |
| 730 | char locale_name[32]; |
| 731 | |
| 732 | static struct env_entry |
| 733 | { |
| 734 | char * name; |
| 735 | char * def_value; |
| 736 | } env_vars[] = |
| 737 | { |
| 738 | {"HOME", "C:/"}, |
| 739 | {"PRELOAD_WINSOCK", NULL}, |
| 740 | {"emacs_dir", "C:/emacs"}, |
| 741 | {"EMACSLOADPATH", "%emacs_dir%/site-lisp;%emacs_dir%/../site-lisp;%emacs_dir%/lisp;%emacs_dir%/leim"}, |
| 742 | {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"}, |
| 743 | {"EMACSDATA", "%emacs_dir%/etc"}, |
| 744 | {"EMACSPATH", "%emacs_dir%/bin"}, |
| 745 | /* We no longer set INFOPATH because Info-default-directory-list |
| 746 | is then ignored. */ |
| 747 | /* {"INFOPATH", "%emacs_dir%/info"}, */ |
| 748 | {"EMACSDOC", "%emacs_dir%/etc"}, |
| 749 | {"TERM", "cmd"}, |
| 750 | {"LANG", NULL}, |
| 751 | }; |
| 752 | |
| 753 | /* Get default locale info and use it for LANG. */ |
| 754 | if (GetLocaleInfo (LOCALE_USER_DEFAULT, |
| 755 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, |
| 756 | locale_name, sizeof (locale_name))) |
| 757 | { |
| 758 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 759 | { |
| 760 | if (strcmp (env_vars[i].name, "LANG") == 0) |
| 761 | { |
| 762 | env_vars[i].def_value = locale_name; |
| 763 | break; |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | #define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */ |
| 769 | |
| 770 | /* Treat emacs_dir specially: set it unconditionally based on our |
| 771 | location, if it appears that we are running from the bin subdir |
| 772 | of a standard installation. */ |
| 773 | { |
| 774 | char *p; |
| 775 | char modname[MAX_PATH]; |
| 776 | |
| 777 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 778 | abort (); |
| 779 | if ((p = strrchr (modname, '\\')) == NULL) |
| 780 | abort (); |
| 781 | *p = 0; |
| 782 | |
| 783 | if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0) |
| 784 | { |
| 785 | char buf[SET_ENV_BUF_SIZE]; |
| 786 | |
| 787 | *p = 0; |
| 788 | for (p = modname; *p; p++) |
| 789 | if (*p == '\\') *p = '/'; |
| 790 | |
| 791 | _snprintf (buf, sizeof(buf)-1, "emacs_dir=%s", modname); |
| 792 | _putenv (strdup (buf)); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
| 797 | { |
| 798 | if (!getenv (env_vars[i].name)) |
| 799 | { |
| 800 | int dont_free = 0; |
| 801 | |
| 802 | if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL) |
| 803 | { |
| 804 | lpval = env_vars[i].def_value; |
| 805 | dwType = REG_EXPAND_SZ; |
| 806 | dont_free = 1; |
| 807 | } |
| 808 | |
| 809 | if (lpval) |
| 810 | { |
| 811 | if (dwType == REG_EXPAND_SZ) |
| 812 | { |
| 813 | char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE]; |
| 814 | |
| 815 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof(buf1)); |
| 816 | _snprintf (buf2, sizeof(buf2)-1, "%s=%s", env_vars[i].name, buf1); |
| 817 | _putenv (strdup (buf2)); |
| 818 | } |
| 819 | else if (dwType == REG_SZ) |
| 820 | { |
| 821 | char buf[SET_ENV_BUF_SIZE]; |
| 822 | |
| 823 | _snprintf (buf, sizeof(buf)-1, "%s=%s", env_vars[i].name, lpval); |
| 824 | _putenv (strdup (buf)); |
| 825 | } |
| 826 | |
| 827 | if (!dont_free) |
| 828 | xfree (lpval); |
| 829 | } |
| 830 | } |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | /* Rebuild system configuration to reflect invoking system. */ |
| 835 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); |
| 836 | |
| 837 | /* Another special case: on NT, the PATH variable is actually named |
| 838 | "Path" although cmd.exe (perhaps NT itself) arranges for |
| 839 | environment variable lookup and setting to be case insensitive. |
| 840 | However, Emacs assumes a fully case sensitive environment, so we |
| 841 | need to change "Path" to "PATH" to match the expectations of |
| 842 | various elisp packages. We do this by the sneaky method of |
| 843 | modifying the string in the C runtime environ entry. |
| 844 | |
| 845 | The same applies to COMSPEC. */ |
| 846 | { |
| 847 | char ** envp; |
| 848 | |
| 849 | for (envp = environ; *envp; envp++) |
| 850 | if (_strnicmp (*envp, "PATH=", 5) == 0) |
| 851 | memcpy (*envp, "PATH=", 5); |
| 852 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) |
| 853 | memcpy (*envp, "COMSPEC=", 8); |
| 854 | } |
| 855 | |
| 856 | /* Remember the initial working directory for getwd, then make the |
| 857 | real wd be the location of emacs.exe to avoid conflicts when |
| 858 | renaming or deleting directories. (We also don't call chdir when |
| 859 | running subprocesses for the same reason.) */ |
| 860 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) |
| 861 | abort (); |
| 862 | |
| 863 | { |
| 864 | char *p; |
| 865 | static char modname[MAX_PATH]; |
| 866 | |
| 867 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) |
| 868 | abort (); |
| 869 | if ((p = strrchr (modname, '\\')) == NULL) |
| 870 | abort (); |
| 871 | *p = 0; |
| 872 | |
| 873 | SetCurrentDirectory (modname); |
| 874 | |
| 875 | /* Ensure argv[0] has the full path to Emacs. */ |
| 876 | *p = '\\'; |
| 877 | argv[0] = modname; |
| 878 | } |
| 879 | |
| 880 | /* Determine if there is a middle mouse button, to allow parse_button |
| 881 | to decide whether right mouse events should be mouse-2 or |
| 882 | mouse-3. */ |
| 883 | XSETINT (Vw32_num_mouse_buttons, GetSystemMetrics (SM_CMOUSEBUTTONS)); |
| 884 | |
| 885 | init_user_info (); |
| 886 | } |
| 887 | |
| 888 | char * |
| 889 | emacs_root_dir (void) |
| 890 | { |
| 891 | static char root_dir[FILENAME_MAX]; |
| 892 | const char *p; |
| 893 | |
| 894 | p = getenv ("emacs_dir"); |
| 895 | if (p == NULL) |
| 896 | abort (); |
| 897 | strcpy (root_dir, p); |
| 898 | root_dir[parse_root (root_dir, NULL)] = '\0'; |
| 899 | dostounix_filename (root_dir); |
| 900 | return root_dir; |
| 901 | } |
| 902 | |
| 903 | /* We don't have scripts to automatically determine the system configuration |
| 904 | for Emacs before it's compiled, and we don't want to have to make the |
| 905 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime |
| 906 | routine. */ |
| 907 | |
| 908 | char * |
| 909 | get_emacs_configuration (void) |
| 910 | { |
| 911 | char *arch, *oem, *os; |
| 912 | int build_num; |
| 913 | static char configuration_buffer[32]; |
| 914 | |
| 915 | /* Determine the processor type. */ |
| 916 | switch (get_processor_type ()) |
| 917 | { |
| 918 | |
| 919 | #ifdef PROCESSOR_INTEL_386 |
| 920 | case PROCESSOR_INTEL_386: |
| 921 | case PROCESSOR_INTEL_486: |
| 922 | case PROCESSOR_INTEL_PENTIUM: |
| 923 | arch = "i386"; |
| 924 | break; |
| 925 | #endif |
| 926 | |
| 927 | #ifdef PROCESSOR_INTEL_860 |
| 928 | case PROCESSOR_INTEL_860: |
| 929 | arch = "i860"; |
| 930 | break; |
| 931 | #endif |
| 932 | |
| 933 | #ifdef PROCESSOR_MIPS_R2000 |
| 934 | case PROCESSOR_MIPS_R2000: |
| 935 | case PROCESSOR_MIPS_R3000: |
| 936 | case PROCESSOR_MIPS_R4000: |
| 937 | arch = "mips"; |
| 938 | break; |
| 939 | #endif |
| 940 | |
| 941 | #ifdef PROCESSOR_ALPHA_21064 |
| 942 | case PROCESSOR_ALPHA_21064: |
| 943 | arch = "alpha"; |
| 944 | break; |
| 945 | #endif |
| 946 | |
| 947 | default: |
| 948 | arch = "unknown"; |
| 949 | break; |
| 950 | } |
| 951 | |
| 952 | /* Use the OEM field to reflect the compiler/library combination. */ |
| 953 | #ifdef _MSC_VER |
| 954 | #define COMPILER_NAME "msvc" |
| 955 | #else |
| 956 | #ifdef __GNUC__ |
| 957 | #define COMPILER_NAME "mingw" |
| 958 | #else |
| 959 | #define COMPILER_NAME "unknown" |
| 960 | #endif |
| 961 | #endif |
| 962 | oem = COMPILER_NAME; |
| 963 | |
| 964 | switch (osinfo_cache.dwPlatformId) { |
| 965 | case VER_PLATFORM_WIN32_NT: |
| 966 | os = "nt"; |
| 967 | build_num = osinfo_cache.dwBuildNumber; |
| 968 | break; |
| 969 | case VER_PLATFORM_WIN32_WINDOWS: |
| 970 | if (osinfo_cache.dwMinorVersion == 0) { |
| 971 | os = "windows95"; |
| 972 | } else { |
| 973 | os = "windows98"; |
| 974 | } |
| 975 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 976 | break; |
| 977 | case VER_PLATFORM_WIN32s: |
| 978 | /* Not supported, should not happen. */ |
| 979 | os = "windows32s"; |
| 980 | build_num = LOWORD (osinfo_cache.dwBuildNumber); |
| 981 | break; |
| 982 | default: |
| 983 | os = "unknown"; |
| 984 | build_num = 0; |
| 985 | break; |
| 986 | } |
| 987 | |
| 988 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
| 989 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, |
| 990 | get_w32_major_version (), get_w32_minor_version (), build_num); |
| 991 | } else { |
| 992 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); |
| 993 | } |
| 994 | |
| 995 | return configuration_buffer; |
| 996 | } |
| 997 | |
| 998 | char * |
| 999 | get_emacs_configuration_options (void) |
| 1000 | { |
| 1001 | static char options_buffer[256]; |
| 1002 | |
| 1003 | /* Work out the effective configure options for this build. */ |
| 1004 | #ifdef _MSC_VER |
| 1005 | #define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100 |
| 1006 | #else |
| 1007 | #ifdef __GNUC__ |
| 1008 | #define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__ |
| 1009 | #else |
| 1010 | #define COMPILER_VERSION "" |
| 1011 | #endif |
| 1012 | #endif |
| 1013 | |
| 1014 | sprintf (options_buffer, COMPILER_VERSION); |
| 1015 | #ifdef EMACSDEBUG |
| 1016 | strcat (options_buffer, " --no-opt"); |
| 1017 | #endif |
| 1018 | #ifdef USER_CFLAGS |
| 1019 | strcat (options_buffer, " --cflags"); |
| 1020 | strcat (options_buffer, USER_CFLAGS); |
| 1021 | #endif |
| 1022 | #ifdef USER_LDFLAGS |
| 1023 | strcat (options_buffer, " --ldflags"); |
| 1024 | strcat (options_buffer, USER_LDFLAGS); |
| 1025 | #endif |
| 1026 | return options_buffer; |
| 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | #include <sys/timeb.h> |
| 1031 | |
| 1032 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ |
| 1033 | void |
| 1034 | gettimeofday (struct timeval *tv, struct timezone *tz) |
| 1035 | { |
| 1036 | struct timeb tb; |
| 1037 | _ftime (&tb); |
| 1038 | |
| 1039 | tv->tv_sec = tb.time; |
| 1040 | tv->tv_usec = tb.millitm * 1000L; |
| 1041 | if (tz) |
| 1042 | { |
| 1043 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ |
| 1044 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | /* ------------------------------------------------------------------------- */ |
| 1049 | /* IO support and wrapper functions for W32 API. */ |
| 1050 | /* ------------------------------------------------------------------------- */ |
| 1051 | |
| 1052 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
| 1053 | on network directories, so we handle that case here. |
| 1054 | (Ulrich Leodolter, 1/11/95). */ |
| 1055 | char * |
| 1056 | sys_ctime (const time_t *t) |
| 1057 | { |
| 1058 | char *str = (char *) ctime (t); |
| 1059 | return (str ? str : "Sun Jan 01 00:00:00 1970"); |
| 1060 | } |
| 1061 | |
| 1062 | /* Emulate sleep...we could have done this with a define, but that |
| 1063 | would necessitate including windows.h in the files that used it. |
| 1064 | This is much easier. */ |
| 1065 | void |
| 1066 | sys_sleep (int seconds) |
| 1067 | { |
| 1068 | Sleep (seconds * 1000); |
| 1069 | } |
| 1070 | |
| 1071 | /* Internal MSVC functions for low-level descriptor munging */ |
| 1072 | extern int __cdecl _set_osfhnd (int fd, long h); |
| 1073 | extern int __cdecl _free_osfhnd (int fd); |
| 1074 | |
| 1075 | /* parallel array of private info on file handles */ |
| 1076 | filedesc fd_info [ MAXDESC ]; |
| 1077 | |
| 1078 | typedef struct volume_info_data { |
| 1079 | struct volume_info_data * next; |
| 1080 | |
| 1081 | /* time when info was obtained */ |
| 1082 | DWORD timestamp; |
| 1083 | |
| 1084 | /* actual volume info */ |
| 1085 | char * root_dir; |
| 1086 | DWORD serialnum; |
| 1087 | DWORD maxcomp; |
| 1088 | DWORD flags; |
| 1089 | char * name; |
| 1090 | char * type; |
| 1091 | } volume_info_data; |
| 1092 | |
| 1093 | /* Global referenced by various functions. */ |
| 1094 | static volume_info_data volume_info; |
| 1095 | |
| 1096 | /* Vector to indicate which drives are local and fixed (for which cached |
| 1097 | data never expires). */ |
| 1098 | static BOOL fixed_drives[26]; |
| 1099 | |
| 1100 | /* Consider cached volume information to be stale if older than 10s, |
| 1101 | at least for non-local drives. Info for fixed drives is never stale. */ |
| 1102 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) |
| 1103 | #define VOLINFO_STILL_VALID( root_dir, info ) \ |
| 1104 | ( ( isalpha (root_dir[0]) && \ |
| 1105 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ |
| 1106 | || GetTickCount () - info->timestamp < 10000 ) |
| 1107 | |
| 1108 | /* Cache support functions. */ |
| 1109 | |
| 1110 | /* Simple linked list with linear search is sufficient. */ |
| 1111 | static volume_info_data *volume_cache = NULL; |
| 1112 | |
| 1113 | static volume_info_data * |
| 1114 | lookup_volume_info (char * root_dir) |
| 1115 | { |
| 1116 | volume_info_data * info; |
| 1117 | |
| 1118 | for (info = volume_cache; info; info = info->next) |
| 1119 | if (stricmp (info->root_dir, root_dir) == 0) |
| 1120 | break; |
| 1121 | return info; |
| 1122 | } |
| 1123 | |
| 1124 | static void |
| 1125 | add_volume_info (char * root_dir, volume_info_data * info) |
| 1126 | { |
| 1127 | info->root_dir = xstrdup (root_dir); |
| 1128 | info->next = volume_cache; |
| 1129 | volume_cache = info; |
| 1130 | } |
| 1131 | |
| 1132 | |
| 1133 | /* Wrapper for GetVolumeInformation, which uses caching to avoid |
| 1134 | performance penalty (~2ms on 486 for local drives, 7.5ms for local |
| 1135 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ |
| 1136 | volume_info_data * |
| 1137 | GetCachedVolumeInformation (char * root_dir) |
| 1138 | { |
| 1139 | volume_info_data * info; |
| 1140 | char default_root[ MAX_PATH ]; |
| 1141 | |
| 1142 | /* NULL for root_dir means use root from current directory. */ |
| 1143 | if (root_dir == NULL) |
| 1144 | { |
| 1145 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) |
| 1146 | return NULL; |
| 1147 | parse_root (default_root, &root_dir); |
| 1148 | *root_dir = 0; |
| 1149 | root_dir = default_root; |
| 1150 | } |
| 1151 | |
| 1152 | /* Local fixed drives can be cached permanently. Removable drives |
| 1153 | cannot be cached permanently, since the volume name and serial |
| 1154 | number (if nothing else) can change. Remote drives should be |
| 1155 | treated as if they are removable, since there is no sure way to |
| 1156 | tell whether they are or not. Also, the UNC association of drive |
| 1157 | letters mapped to remote volumes can be changed at any time (even |
| 1158 | by other processes) without notice. |
| 1159 | |
| 1160 | As a compromise, so we can benefit from caching info for remote |
| 1161 | volumes, we use a simple expiry mechanism to invalidate cache |
| 1162 | entries that are more than ten seconds old. */ |
| 1163 | |
| 1164 | #if 0 |
| 1165 | /* No point doing this, because WNetGetConnection is even slower than |
| 1166 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, |
| 1167 | GetDriveType is about the only call of this type which does not |
| 1168 | involve network access, and so is extremely quick). */ |
| 1169 | |
| 1170 | /* Map drive letter to UNC if remote. */ |
| 1171 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) |
| 1172 | { |
| 1173 | char remote_name[ 256 ]; |
| 1174 | char drive[3] = { root_dir[0], ':' }; |
| 1175 | |
| 1176 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) |
| 1177 | == NO_ERROR) |
| 1178 | /* do something */ ; |
| 1179 | } |
| 1180 | #endif |
| 1181 | |
| 1182 | info = lookup_volume_info (root_dir); |
| 1183 | |
| 1184 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) |
| 1185 | { |
| 1186 | char name[ 256 ]; |
| 1187 | DWORD serialnum; |
| 1188 | DWORD maxcomp; |
| 1189 | DWORD flags; |
| 1190 | char type[ 256 ]; |
| 1191 | |
| 1192 | /* Info is not cached, or is stale. */ |
| 1193 | if (!GetVolumeInformation (root_dir, |
| 1194 | name, sizeof (name), |
| 1195 | &serialnum, |
| 1196 | &maxcomp, |
| 1197 | &flags, |
| 1198 | type, sizeof (type))) |
| 1199 | return NULL; |
| 1200 | |
| 1201 | /* Cache the volume information for future use, overwriting existing |
| 1202 | entry if present. */ |
| 1203 | if (info == NULL) |
| 1204 | { |
| 1205 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); |
| 1206 | add_volume_info (root_dir, info); |
| 1207 | } |
| 1208 | else |
| 1209 | { |
| 1210 | xfree (info->name); |
| 1211 | xfree (info->type); |
| 1212 | } |
| 1213 | |
| 1214 | info->name = xstrdup (name); |
| 1215 | info->serialnum = serialnum; |
| 1216 | info->maxcomp = maxcomp; |
| 1217 | info->flags = flags; |
| 1218 | info->type = xstrdup (type); |
| 1219 | info->timestamp = GetTickCount (); |
| 1220 | } |
| 1221 | |
| 1222 | return info; |
| 1223 | } |
| 1224 | |
| 1225 | /* Get information on the volume where name is held; set path pointer to |
| 1226 | start of pathname in name (past UNC header\volume header if present). */ |
| 1227 | int |
| 1228 | get_volume_info (const char * name, const char ** pPath) |
| 1229 | { |
| 1230 | char temp[MAX_PATH]; |
| 1231 | char *rootname = NULL; /* default to current volume */ |
| 1232 | volume_info_data * info; |
| 1233 | |
| 1234 | if (name == NULL) |
| 1235 | return FALSE; |
| 1236 | |
| 1237 | /* find the root name of the volume if given */ |
| 1238 | if (isalpha (name[0]) && name[1] == ':') |
| 1239 | { |
| 1240 | rootname = temp; |
| 1241 | temp[0] = *name++; |
| 1242 | temp[1] = *name++; |
| 1243 | temp[2] = '\\'; |
| 1244 | temp[3] = 0; |
| 1245 | } |
| 1246 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) |
| 1247 | { |
| 1248 | char *str = temp; |
| 1249 | int slashes = 4; |
| 1250 | rootname = temp; |
| 1251 | do |
| 1252 | { |
| 1253 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) |
| 1254 | break; |
| 1255 | *str++ = *name++; |
| 1256 | } |
| 1257 | while ( *name ); |
| 1258 | |
| 1259 | *str++ = '\\'; |
| 1260 | *str = 0; |
| 1261 | } |
| 1262 | |
| 1263 | if (pPath) |
| 1264 | *pPath = name; |
| 1265 | |
| 1266 | info = GetCachedVolumeInformation (rootname); |
| 1267 | if (info != NULL) |
| 1268 | { |
| 1269 | /* Set global referenced by other functions. */ |
| 1270 | volume_info = *info; |
| 1271 | return TRUE; |
| 1272 | } |
| 1273 | return FALSE; |
| 1274 | } |
| 1275 | |
| 1276 | /* Determine if volume is FAT format (ie. only supports short 8.3 |
| 1277 | names); also set path pointer to start of pathname in name. */ |
| 1278 | int |
| 1279 | is_fat_volume (const char * name, const char ** pPath) |
| 1280 | { |
| 1281 | if (get_volume_info (name, pPath)) |
| 1282 | return (volume_info.maxcomp == 12); |
| 1283 | return FALSE; |
| 1284 | } |
| 1285 | |
| 1286 | /* Map filename to a legal 8.3 name if necessary. */ |
| 1287 | const char * |
| 1288 | map_w32_filename (const char * name, const char ** pPath) |
| 1289 | { |
| 1290 | static char shortname[MAX_PATH]; |
| 1291 | char * str = shortname; |
| 1292 | char c; |
| 1293 | char * path; |
| 1294 | const char * save_name = name; |
| 1295 | |
| 1296 | if (strlen (name) >= MAX_PATH) |
| 1297 | { |
| 1298 | /* Return a filename which will cause callers to fail. */ |
| 1299 | strcpy (shortname, "?"); |
| 1300 | return shortname; |
| 1301 | } |
| 1302 | |
| 1303 | if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */ |
| 1304 | { |
| 1305 | register int left = 8; /* maximum number of chars in part */ |
| 1306 | register int extn = 0; /* extension added? */ |
| 1307 | register int dots = 2; /* maximum number of dots allowed */ |
| 1308 | |
| 1309 | while (name < path) |
| 1310 | *str++ = *name++; /* skip past UNC header */ |
| 1311 | |
| 1312 | while ((c = *name++)) |
| 1313 | { |
| 1314 | switch ( c ) |
| 1315 | { |
| 1316 | case '\\': |
| 1317 | case '/': |
| 1318 | *str++ = '\\'; |
| 1319 | extn = 0; /* reset extension flags */ |
| 1320 | dots = 2; /* max 2 dots */ |
| 1321 | left = 8; /* max length 8 for main part */ |
| 1322 | break; |
| 1323 | case ':': |
| 1324 | *str++ = ':'; |
| 1325 | extn = 0; /* reset extension flags */ |
| 1326 | dots = 2; /* max 2 dots */ |
| 1327 | left = 8; /* max length 8 for main part */ |
| 1328 | break; |
| 1329 | case '.': |
| 1330 | if ( dots ) |
| 1331 | { |
| 1332 | /* Convert path components of the form .xxx to _xxx, |
| 1333 | but leave . and .. as they are. This allows .emacs |
| 1334 | to be read as _emacs, for example. */ |
| 1335 | |
| 1336 | if (! *name || |
| 1337 | *name == '.' || |
| 1338 | IS_DIRECTORY_SEP (*name)) |
| 1339 | { |
| 1340 | *str++ = '.'; |
| 1341 | dots--; |
| 1342 | } |
| 1343 | else |
| 1344 | { |
| 1345 | *str++ = '_'; |
| 1346 | left--; |
| 1347 | dots = 0; |
| 1348 | } |
| 1349 | } |
| 1350 | else if ( !extn ) |
| 1351 | { |
| 1352 | *str++ = '.'; |
| 1353 | extn = 1; /* we've got an extension */ |
| 1354 | left = 3; /* 3 chars in extension */ |
| 1355 | } |
| 1356 | else |
| 1357 | { |
| 1358 | /* any embedded dots after the first are converted to _ */ |
| 1359 | *str++ = '_'; |
| 1360 | } |
| 1361 | break; |
| 1362 | case '~': |
| 1363 | case '#': /* don't lose these, they're important */ |
| 1364 | if ( ! left ) |
| 1365 | str[-1] = c; /* replace last character of part */ |
| 1366 | /* FALLTHRU */ |
| 1367 | default: |
| 1368 | if ( left ) |
| 1369 | { |
| 1370 | *str++ = tolower (c); /* map to lower case (looks nicer) */ |
| 1371 | left--; |
| 1372 | dots = 0; /* started a path component */ |
| 1373 | } |
| 1374 | break; |
| 1375 | } |
| 1376 | } |
| 1377 | *str = '\0'; |
| 1378 | } |
| 1379 | else |
| 1380 | { |
| 1381 | strcpy (shortname, name); |
| 1382 | unixtodos_filename (shortname); |
| 1383 | } |
| 1384 | |
| 1385 | if (pPath) |
| 1386 | *pPath = shortname + (path - save_name); |
| 1387 | |
| 1388 | return shortname; |
| 1389 | } |
| 1390 | |
| 1391 | static int |
| 1392 | is_exec (const char * name) |
| 1393 | { |
| 1394 | char * p = strrchr (name, '.'); |
| 1395 | return |
| 1396 | (p != NULL |
| 1397 | && (stricmp (p, ".exe") == 0 || |
| 1398 | stricmp (p, ".com") == 0 || |
| 1399 | stricmp (p, ".bat") == 0 || |
| 1400 | stricmp (p, ".cmd") == 0)); |
| 1401 | } |
| 1402 | |
| 1403 | /* Emulate the Unix directory procedures opendir, closedir, |
| 1404 | and readdir. We can't use the procedures supplied in sysdep.c, |
| 1405 | so we provide them here. */ |
| 1406 | |
| 1407 | struct direct dir_static; /* simulated directory contents */ |
| 1408 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; |
| 1409 | static int dir_is_fat; |
| 1410 | static char dir_pathname[MAXPATHLEN+1]; |
| 1411 | static WIN32_FIND_DATA dir_find_data; |
| 1412 | |
| 1413 | /* Support shares on a network resource as subdirectories of a read-only |
| 1414 | root directory. */ |
| 1415 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 1416 | HANDLE open_unc_volume (char *); |
| 1417 | char *read_unc_volume (HANDLE, char *, int); |
| 1418 | void close_unc_volume (HANDLE); |
| 1419 | |
| 1420 | DIR * |
| 1421 | opendir (char *filename) |
| 1422 | { |
| 1423 | DIR *dirp; |
| 1424 | |
| 1425 | /* Opening is done by FindFirstFile. However, a read is inherent to |
| 1426 | this operation, so we defer the open until read time. */ |
| 1427 | |
| 1428 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1429 | return NULL; |
| 1430 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1431 | return NULL; |
| 1432 | |
| 1433 | if (is_unc_volume (filename)) |
| 1434 | { |
| 1435 | wnet_enum_handle = open_unc_volume (filename); |
| 1436 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) |
| 1437 | return NULL; |
| 1438 | } |
| 1439 | |
| 1440 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) |
| 1441 | return NULL; |
| 1442 | |
| 1443 | dirp->dd_fd = 0; |
| 1444 | dirp->dd_loc = 0; |
| 1445 | dirp->dd_size = 0; |
| 1446 | |
| 1447 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); |
| 1448 | dir_pathname[MAXPATHLEN] = '\0'; |
| 1449 | dir_is_fat = is_fat_volume (filename, NULL); |
| 1450 | |
| 1451 | return dirp; |
| 1452 | } |
| 1453 | |
| 1454 | void |
| 1455 | closedir (DIR *dirp) |
| 1456 | { |
| 1457 | /* If we have a find-handle open, close it. */ |
| 1458 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
| 1459 | { |
| 1460 | FindClose (dir_find_handle); |
| 1461 | dir_find_handle = INVALID_HANDLE_VALUE; |
| 1462 | } |
| 1463 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1464 | { |
| 1465 | close_unc_volume (wnet_enum_handle); |
| 1466 | wnet_enum_handle = INVALID_HANDLE_VALUE; |
| 1467 | } |
| 1468 | xfree ((char *) dirp); |
| 1469 | } |
| 1470 | |
| 1471 | struct direct * |
| 1472 | readdir (DIR *dirp) |
| 1473 | { |
| 1474 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
| 1475 | { |
| 1476 | if (!read_unc_volume (wnet_enum_handle, |
| 1477 | dir_find_data.cFileName, |
| 1478 | MAX_PATH)) |
| 1479 | return NULL; |
| 1480 | } |
| 1481 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
| 1482 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1483 | { |
| 1484 | char filename[MAXNAMLEN + 3]; |
| 1485 | int ln; |
| 1486 | |
| 1487 | strcpy (filename, dir_pathname); |
| 1488 | ln = strlen (filename) - 1; |
| 1489 | if (!IS_DIRECTORY_SEP (filename[ln])) |
| 1490 | strcat (filename, "\\"); |
| 1491 | strcat (filename, "*"); |
| 1492 | |
| 1493 | dir_find_handle = FindFirstFile (filename, &dir_find_data); |
| 1494 | |
| 1495 | if (dir_find_handle == INVALID_HANDLE_VALUE) |
| 1496 | return NULL; |
| 1497 | } |
| 1498 | else |
| 1499 | { |
| 1500 | if (!FindNextFile (dir_find_handle, &dir_find_data)) |
| 1501 | return NULL; |
| 1502 | } |
| 1503 | |
| 1504 | /* Emacs never uses this value, so don't bother making it match |
| 1505 | value returned by stat(). */ |
| 1506 | dir_static.d_ino = 1; |
| 1507 | |
| 1508 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + |
| 1509 | dir_static.d_namlen - dir_static.d_namlen % 4; |
| 1510 | |
| 1511 | dir_static.d_namlen = strlen (dir_find_data.cFileName); |
| 1512 | strcpy (dir_static.d_name, dir_find_data.cFileName); |
| 1513 | if (dir_is_fat) |
| 1514 | _strlwr (dir_static.d_name); |
| 1515 | else if (!NILP (Vw32_downcase_file_names)) |
| 1516 | { |
| 1517 | register char *p; |
| 1518 | for (p = dir_static.d_name; *p; p++) |
| 1519 | if (*p >= 'a' && *p <= 'z') |
| 1520 | break; |
| 1521 | if (!*p) |
| 1522 | _strlwr (dir_static.d_name); |
| 1523 | } |
| 1524 | |
| 1525 | return &dir_static; |
| 1526 | } |
| 1527 | |
| 1528 | HANDLE |
| 1529 | open_unc_volume (char *path) |
| 1530 | { |
| 1531 | NETRESOURCE nr; |
| 1532 | HANDLE henum; |
| 1533 | int result; |
| 1534 | |
| 1535 | nr.dwScope = RESOURCE_GLOBALNET; |
| 1536 | nr.dwType = RESOURCETYPE_DISK; |
| 1537 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; |
| 1538 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; |
| 1539 | nr.lpLocalName = NULL; |
| 1540 | nr.lpRemoteName = map_w32_filename (path, NULL); |
| 1541 | nr.lpComment = NULL; |
| 1542 | nr.lpProvider = NULL; |
| 1543 | |
| 1544 | result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK, |
| 1545 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); |
| 1546 | |
| 1547 | if (result == NO_ERROR) |
| 1548 | return henum; |
| 1549 | else |
| 1550 | return INVALID_HANDLE_VALUE; |
| 1551 | } |
| 1552 | |
| 1553 | char * |
| 1554 | read_unc_volume (HANDLE henum, char *readbuf, int size) |
| 1555 | { |
| 1556 | DWORD count; |
| 1557 | int result; |
| 1558 | DWORD bufsize = 512; |
| 1559 | char *buffer; |
| 1560 | char *ptr; |
| 1561 | |
| 1562 | count = 1; |
| 1563 | buffer = alloca (bufsize); |
| 1564 | result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize); |
| 1565 | if (result != NO_ERROR) |
| 1566 | return NULL; |
| 1567 | |
| 1568 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ |
| 1569 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; |
| 1570 | ptr += 2; |
| 1571 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; |
| 1572 | ptr++; |
| 1573 | |
| 1574 | strncpy (readbuf, ptr, size); |
| 1575 | return readbuf; |
| 1576 | } |
| 1577 | |
| 1578 | void |
| 1579 | close_unc_volume (HANDLE henum) |
| 1580 | { |
| 1581 | if (henum != INVALID_HANDLE_VALUE) |
| 1582 | WNetCloseEnum (henum); |
| 1583 | } |
| 1584 | |
| 1585 | DWORD |
| 1586 | unc_volume_file_attributes (char *path) |
| 1587 | { |
| 1588 | HANDLE henum; |
| 1589 | DWORD attrs; |
| 1590 | |
| 1591 | henum = open_unc_volume (path); |
| 1592 | if (henum == INVALID_HANDLE_VALUE) |
| 1593 | return -1; |
| 1594 | |
| 1595 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; |
| 1596 | |
| 1597 | close_unc_volume (henum); |
| 1598 | |
| 1599 | return attrs; |
| 1600 | } |
| 1601 | |
| 1602 | |
| 1603 | /* Shadow some MSVC runtime functions to map requests for long filenames |
| 1604 | to reasonable short names if necessary. This was originally added to |
| 1605 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support |
| 1606 | long file names. */ |
| 1607 | |
| 1608 | int |
| 1609 | sys_access (const char * path, int mode) |
| 1610 | { |
| 1611 | DWORD attributes; |
| 1612 | |
| 1613 | /* MSVC implementation doesn't recognize D_OK. */ |
| 1614 | path = map_w32_filename (path, NULL); |
| 1615 | if (is_unc_volume (path)) |
| 1616 | { |
| 1617 | attributes = unc_volume_file_attributes (path); |
| 1618 | if (attributes == -1) { |
| 1619 | errno = EACCES; |
| 1620 | return -1; |
| 1621 | } |
| 1622 | } |
| 1623 | else if ((attributes = GetFileAttributes (path)) == -1) |
| 1624 | { |
| 1625 | /* Should try mapping GetLastError to errno; for now just indicate |
| 1626 | that path doesn't exist. */ |
| 1627 | errno = EACCES; |
| 1628 | return -1; |
| 1629 | } |
| 1630 | if ((mode & X_OK) != 0 && !is_exec (path)) |
| 1631 | { |
| 1632 | errno = EACCES; |
| 1633 | return -1; |
| 1634 | } |
| 1635 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) |
| 1636 | { |
| 1637 | errno = EACCES; |
| 1638 | return -1; |
| 1639 | } |
| 1640 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) |
| 1641 | { |
| 1642 | errno = EACCES; |
| 1643 | return -1; |
| 1644 | } |
| 1645 | return 0; |
| 1646 | } |
| 1647 | |
| 1648 | int |
| 1649 | sys_chdir (const char * path) |
| 1650 | { |
| 1651 | return _chdir (map_w32_filename (path, NULL)); |
| 1652 | } |
| 1653 | |
| 1654 | int |
| 1655 | sys_chmod (const char * path, int mode) |
| 1656 | { |
| 1657 | return _chmod (map_w32_filename (path, NULL), mode); |
| 1658 | } |
| 1659 | |
| 1660 | int |
| 1661 | sys_creat (const char * path, int mode) |
| 1662 | { |
| 1663 | return _creat (map_w32_filename (path, NULL), mode); |
| 1664 | } |
| 1665 | |
| 1666 | FILE * |
| 1667 | sys_fopen(const char * path, const char * mode) |
| 1668 | { |
| 1669 | int fd; |
| 1670 | int oflag; |
| 1671 | const char * mode_save = mode; |
| 1672 | |
| 1673 | /* Force all file handles to be non-inheritable. This is necessary to |
| 1674 | ensure child processes don't unwittingly inherit handles that might |
| 1675 | prevent future file access. */ |
| 1676 | |
| 1677 | if (mode[0] == 'r') |
| 1678 | oflag = O_RDONLY; |
| 1679 | else if (mode[0] == 'w' || mode[0] == 'a') |
| 1680 | oflag = O_WRONLY | O_CREAT | O_TRUNC; |
| 1681 | else |
| 1682 | return NULL; |
| 1683 | |
| 1684 | /* Only do simplistic option parsing. */ |
| 1685 | while (*++mode) |
| 1686 | if (mode[0] == '+') |
| 1687 | { |
| 1688 | oflag &= ~(O_RDONLY | O_WRONLY); |
| 1689 | oflag |= O_RDWR; |
| 1690 | } |
| 1691 | else if (mode[0] == 'b') |
| 1692 | { |
| 1693 | oflag &= ~O_TEXT; |
| 1694 | oflag |= O_BINARY; |
| 1695 | } |
| 1696 | else if (mode[0] == 't') |
| 1697 | { |
| 1698 | oflag &= ~O_BINARY; |
| 1699 | oflag |= O_TEXT; |
| 1700 | } |
| 1701 | else break; |
| 1702 | |
| 1703 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
| 1704 | if (fd < 0) |
| 1705 | return NULL; |
| 1706 | |
| 1707 | return _fdopen (fd, mode_save); |
| 1708 | } |
| 1709 | |
| 1710 | /* This only works on NTFS volumes, but is useful to have. */ |
| 1711 | int |
| 1712 | sys_link (const char * old, const char * new) |
| 1713 | { |
| 1714 | HANDLE fileh; |
| 1715 | int result = -1; |
| 1716 | char oldname[MAX_PATH], newname[MAX_PATH]; |
| 1717 | |
| 1718 | if (old == NULL || new == NULL) |
| 1719 | { |
| 1720 | errno = ENOENT; |
| 1721 | return -1; |
| 1722 | } |
| 1723 | |
| 1724 | strcpy (oldname, map_w32_filename (old, NULL)); |
| 1725 | strcpy (newname, map_w32_filename (new, NULL)); |
| 1726 | |
| 1727 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, |
| 1728 | FILE_FLAG_BACKUP_SEMANTICS, NULL); |
| 1729 | if (fileh != INVALID_HANDLE_VALUE) |
| 1730 | { |
| 1731 | int wlen; |
| 1732 | |
| 1733 | /* Confusingly, the "alternate" stream name field does not apply |
| 1734 | when restoring a hard link, and instead contains the actual |
| 1735 | stream data for the link (ie. the name of the link to create). |
| 1736 | The WIN32_STREAM_ID structure before the cStreamName field is |
| 1737 | the stream header, which is then immediately followed by the |
| 1738 | stream data. */ |
| 1739 | |
| 1740 | struct { |
| 1741 | WIN32_STREAM_ID wid; |
| 1742 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ |
| 1743 | } data; |
| 1744 | |
| 1745 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, |
| 1746 | data.wid.cStreamName, MAX_PATH); |
| 1747 | if (wlen > 0) |
| 1748 | { |
| 1749 | LPVOID context = NULL; |
| 1750 | DWORD wbytes = 0; |
| 1751 | |
| 1752 | data.wid.dwStreamId = BACKUP_LINK; |
| 1753 | data.wid.dwStreamAttributes = 0; |
| 1754 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); |
| 1755 | data.wid.Size.HighPart = 0; |
| 1756 | data.wid.dwStreamNameSize = 0; |
| 1757 | |
| 1758 | if (BackupWrite (fileh, (LPBYTE)&data, |
| 1759 | offsetof (WIN32_STREAM_ID, cStreamName) |
| 1760 | + data.wid.Size.LowPart, |
| 1761 | &wbytes, FALSE, FALSE, &context) |
| 1762 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) |
| 1763 | { |
| 1764 | /* succeeded */ |
| 1765 | result = 0; |
| 1766 | } |
| 1767 | else |
| 1768 | { |
| 1769 | /* Should try mapping GetLastError to errno; for now just |
| 1770 | indicate a general error (eg. links not supported). */ |
| 1771 | errno = EINVAL; // perhaps EMLINK? |
| 1772 | } |
| 1773 | } |
| 1774 | |
| 1775 | CloseHandle (fileh); |
| 1776 | } |
| 1777 | else |
| 1778 | errno = ENOENT; |
| 1779 | |
| 1780 | return result; |
| 1781 | } |
| 1782 | |
| 1783 | int |
| 1784 | sys_mkdir (const char * path) |
| 1785 | { |
| 1786 | return _mkdir (map_w32_filename (path, NULL)); |
| 1787 | } |
| 1788 | |
| 1789 | /* Because of long name mapping issues, we need to implement this |
| 1790 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate |
| 1791 | a unique name, instead of setting the input template to an empty |
| 1792 | string. |
| 1793 | |
| 1794 | Standard algorithm seems to be use pid or tid with a letter on the |
| 1795 | front (in place of the 6 X's) and cycle through the letters to find a |
| 1796 | unique name. We extend that to allow any reasonable character as the |
| 1797 | first of the 6 X's. */ |
| 1798 | char * |
| 1799 | sys_mktemp (char * template) |
| 1800 | { |
| 1801 | char * p; |
| 1802 | int i; |
| 1803 | unsigned uid = GetCurrentThreadId (); |
| 1804 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; |
| 1805 | |
| 1806 | if (template == NULL) |
| 1807 | return NULL; |
| 1808 | p = template + strlen (template); |
| 1809 | i = 5; |
| 1810 | /* replace up to the last 5 X's with uid in decimal */ |
| 1811 | while (--p >= template && p[0] == 'X' && --i >= 0) |
| 1812 | { |
| 1813 | p[0] = '0' + uid % 10; |
| 1814 | uid /= 10; |
| 1815 | } |
| 1816 | |
| 1817 | if (i < 0 && p[0] == 'X') |
| 1818 | { |
| 1819 | i = 0; |
| 1820 | do |
| 1821 | { |
| 1822 | int save_errno = errno; |
| 1823 | p[0] = first_char[i]; |
| 1824 | if (sys_access (template, 0) < 0) |
| 1825 | { |
| 1826 | errno = save_errno; |
| 1827 | return template; |
| 1828 | } |
| 1829 | } |
| 1830 | while (++i < sizeof (first_char)); |
| 1831 | } |
| 1832 | |
| 1833 | /* Template is badly formed or else we can't generate a unique name, |
| 1834 | so return empty string */ |
| 1835 | template[0] = 0; |
| 1836 | return template; |
| 1837 | } |
| 1838 | |
| 1839 | int |
| 1840 | sys_open (const char * path, int oflag, int mode) |
| 1841 | { |
| 1842 | const char* mpath = map_w32_filename (path, NULL); |
| 1843 | /* Try to open file without _O_CREAT, to be able to write to hidden |
| 1844 | and system files. Force all file handles to be |
| 1845 | non-inheritable. */ |
| 1846 | int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode); |
| 1847 | if (res >= 0) |
| 1848 | return res; |
| 1849 | return _open (mpath, oflag | _O_NOINHERIT, mode); |
| 1850 | } |
| 1851 | |
| 1852 | int |
| 1853 | sys_rename (const char * oldname, const char * newname) |
| 1854 | { |
| 1855 | BOOL result; |
| 1856 | char temp[MAX_PATH]; |
| 1857 | |
| 1858 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
| 1859 | alias in a number of circumstances (it is not easy to predict when |
| 1860 | just by looking at oldname and newname, unfortunately). In these |
| 1861 | cases, renaming through a temporary name avoids the problem. |
| 1862 | |
| 1863 | A second problem on Windows 95 is that renaming through a temp name when |
| 1864 | newname is uppercase fails (the final long name ends up in |
| 1865 | lowercase, although the short alias might be uppercase) UNLESS the |
| 1866 | long temp name is not 8.3. |
| 1867 | |
| 1868 | So, on Windows 95 we always rename through a temp name, and we make sure |
| 1869 | the temp name has a long extension to ensure correct renaming. */ |
| 1870 | |
| 1871 | strcpy (temp, map_w32_filename (oldname, NULL)); |
| 1872 | |
| 1873 | if (os_subtype == OS_WIN95) |
| 1874 | { |
| 1875 | char * o; |
| 1876 | char * p; |
| 1877 | int i = 0; |
| 1878 | |
| 1879 | oldname = map_w32_filename (oldname, NULL); |
| 1880 | if (o = strrchr (oldname, '\\')) |
| 1881 | o++; |
| 1882 | else |
| 1883 | o = (char *) oldname; |
| 1884 | |
| 1885 | if (p = strrchr (temp, '\\')) |
| 1886 | p++; |
| 1887 | else |
| 1888 | p = temp; |
| 1889 | |
| 1890 | do |
| 1891 | { |
| 1892 | /* Force temp name to require a manufactured 8.3 alias - this |
| 1893 | seems to make the second rename work properly. */ |
| 1894 | sprintf (p, "_.%s.%u", o, i); |
| 1895 | i++; |
| 1896 | result = rename (oldname, temp); |
| 1897 | } |
| 1898 | /* This loop must surely terminate! */ |
| 1899 | while (result < 0 && errno == EEXIST); |
| 1900 | if (result < 0) |
| 1901 | return -1; |
| 1902 | } |
| 1903 | |
| 1904 | /* Emulate Unix behaviour - newname is deleted if it already exists |
| 1905 | (at least if it is a file; don't do this for directories). |
| 1906 | |
| 1907 | Since we mustn't do this if we are just changing the case of the |
| 1908 | file name (we would end up deleting the file we are trying to |
| 1909 | rename!), we let rename detect if the destination file already |
| 1910 | exists - that way we avoid the possible pitfalls of trying to |
| 1911 | determine ourselves whether two names really refer to the same |
| 1912 | file, which is not always possible in the general case. (Consider |
| 1913 | all the permutations of shared or subst'd drives, etc.) */ |
| 1914 | |
| 1915 | newname = map_w32_filename (newname, NULL); |
| 1916 | result = rename (temp, newname); |
| 1917 | |
| 1918 | if (result < 0 |
| 1919 | && errno == EEXIST |
| 1920 | && _chmod (newname, 0666) == 0 |
| 1921 | && _unlink (newname) == 0) |
| 1922 | result = rename (temp, newname); |
| 1923 | |
| 1924 | return result; |
| 1925 | } |
| 1926 | |
| 1927 | int |
| 1928 | sys_rmdir (const char * path) |
| 1929 | { |
| 1930 | return _rmdir (map_w32_filename (path, NULL)); |
| 1931 | } |
| 1932 | |
| 1933 | int |
| 1934 | sys_unlink (const char * path) |
| 1935 | { |
| 1936 | path = map_w32_filename (path, NULL); |
| 1937 | |
| 1938 | /* On Unix, unlink works without write permission. */ |
| 1939 | _chmod (path, 0666); |
| 1940 | return _unlink (path); |
| 1941 | } |
| 1942 | |
| 1943 | static FILETIME utc_base_ft; |
| 1944 | static long double utc_base; |
| 1945 | static int init = 0; |
| 1946 | |
| 1947 | static time_t |
| 1948 | convert_time (FILETIME ft) |
| 1949 | { |
| 1950 | long double ret; |
| 1951 | |
| 1952 | if (!init) |
| 1953 | { |
| 1954 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1955 | SYSTEMTIME st; |
| 1956 | |
| 1957 | st.wYear = 1970; |
| 1958 | st.wMonth = 1; |
| 1959 | st.wDay = 1; |
| 1960 | st.wHour = 0; |
| 1961 | st.wMinute = 0; |
| 1962 | st.wSecond = 0; |
| 1963 | st.wMilliseconds = 0; |
| 1964 | |
| 1965 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1966 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1967 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 1968 | init = 1; |
| 1969 | } |
| 1970 | |
| 1971 | if (CompareFileTime (&ft, &utc_base_ft) < 0) |
| 1972 | return 0; |
| 1973 | |
| 1974 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; |
| 1975 | ret -= utc_base; |
| 1976 | return (time_t) (ret * 1e-7); |
| 1977 | } |
| 1978 | |
| 1979 | void |
| 1980 | convert_from_time_t (time_t time, FILETIME * pft) |
| 1981 | { |
| 1982 | long double tmp; |
| 1983 | |
| 1984 | if (!init) |
| 1985 | { |
| 1986 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ |
| 1987 | SYSTEMTIME st; |
| 1988 | |
| 1989 | st.wYear = 1970; |
| 1990 | st.wMonth = 1; |
| 1991 | st.wDay = 1; |
| 1992 | st.wHour = 0; |
| 1993 | st.wMinute = 0; |
| 1994 | st.wSecond = 0; |
| 1995 | st.wMilliseconds = 0; |
| 1996 | |
| 1997 | SystemTimeToFileTime (&st, &utc_base_ft); |
| 1998 | utc_base = (long double) utc_base_ft.dwHighDateTime |
| 1999 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; |
| 2000 | init = 1; |
| 2001 | } |
| 2002 | |
| 2003 | /* time in 100ns units since 1-Jan-1601 */ |
| 2004 | tmp = (long double) time * 1e7 + utc_base; |
| 2005 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); |
| 2006 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
| 2007 | } |
| 2008 | |
| 2009 | #if 0 |
| 2010 | /* No reason to keep this; faking inode values either by hashing or even |
| 2011 | using the file index from GetInformationByHandle, is not perfect and |
| 2012 | so by default Emacs doesn't use the inode values on Windows. |
| 2013 | Instead, we now determine file-truename correctly (except for |
| 2014 | possible drive aliasing etc). */ |
| 2015 | |
| 2016 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ |
| 2017 | static unsigned |
| 2018 | hashval (const unsigned char * str) |
| 2019 | { |
| 2020 | unsigned h = 0; |
| 2021 | while (*str) |
| 2022 | { |
| 2023 | h = (h << 4) + *str++; |
| 2024 | h ^= (h >> 28); |
| 2025 | } |
| 2026 | return h; |
| 2027 | } |
| 2028 | |
| 2029 | /* Return the hash value of the canonical pathname, excluding the |
| 2030 | drive/UNC header, to get a hopefully unique inode number. */ |
| 2031 | static DWORD |
| 2032 | generate_inode_val (const char * name) |
| 2033 | { |
| 2034 | char fullname[ MAX_PATH ]; |
| 2035 | char * p; |
| 2036 | unsigned hash; |
| 2037 | |
| 2038 | /* Get the truly canonical filename, if it exists. (Note: this |
| 2039 | doesn't resolve aliasing due to subst commands, or recognise hard |
| 2040 | links. */ |
| 2041 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) |
| 2042 | abort (); |
| 2043 | |
| 2044 | parse_root (fullname, &p); |
| 2045 | /* Normal W32 filesystems are still case insensitive. */ |
| 2046 | _strlwr (p); |
| 2047 | return hashval (p); |
| 2048 | } |
| 2049 | |
| 2050 | #endif |
| 2051 | |
| 2052 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
| 2053 | replace it with our own. This also allows us to calculate consistent |
| 2054 | inode values without hacks in the main Emacs code. */ |
| 2055 | int |
| 2056 | stat (const char * path, struct stat * buf) |
| 2057 | { |
| 2058 | char *name, *r; |
| 2059 | WIN32_FIND_DATA wfd; |
| 2060 | HANDLE fh; |
| 2061 | DWORD fake_inode; |
| 2062 | int permission; |
| 2063 | int len; |
| 2064 | int rootdir = FALSE; |
| 2065 | |
| 2066 | if (path == NULL || buf == NULL) |
| 2067 | { |
| 2068 | errno = EFAULT; |
| 2069 | return -1; |
| 2070 | } |
| 2071 | |
| 2072 | name = (char *) map_w32_filename (path, &path); |
| 2073 | /* must be valid filename, no wild cards or other invalid characters */ |
| 2074 | if (strpbrk (name, "*?|<>\"")) |
| 2075 | { |
| 2076 | errno = ENOENT; |
| 2077 | return -1; |
| 2078 | } |
| 2079 | |
| 2080 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
| 2081 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; |
| 2082 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') |
| 2083 | { |
| 2084 | r[1] = r[2] = '\0'; |
| 2085 | } |
| 2086 | |
| 2087 | /* Remove trailing directory separator, unless name is the root |
| 2088 | directory of a drive or UNC volume in which case ensure there |
| 2089 | is a trailing separator. */ |
| 2090 | len = strlen (name); |
| 2091 | rootdir = (path >= name + len - 1 |
| 2092 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); |
| 2093 | name = strcpy (alloca (len + 2), name); |
| 2094 | |
| 2095 | if (is_unc_volume (name)) |
| 2096 | { |
| 2097 | DWORD attrs = unc_volume_file_attributes (name); |
| 2098 | |
| 2099 | if (attrs == -1) |
| 2100 | return -1; |
| 2101 | |
| 2102 | memset (&wfd, 0, sizeof (wfd)); |
| 2103 | wfd.dwFileAttributes = attrs; |
| 2104 | wfd.ftCreationTime = utc_base_ft; |
| 2105 | wfd.ftLastAccessTime = utc_base_ft; |
| 2106 | wfd.ftLastWriteTime = utc_base_ft; |
| 2107 | strcpy (wfd.cFileName, name); |
| 2108 | } |
| 2109 | else if (rootdir) |
| 2110 | { |
| 2111 | if (!IS_DIRECTORY_SEP (name[len-1])) |
| 2112 | strcat (name, "\\"); |
| 2113 | if (GetDriveType (name) < 2) |
| 2114 | { |
| 2115 | errno = ENOENT; |
| 2116 | return -1; |
| 2117 | } |
| 2118 | memset (&wfd, 0, sizeof (wfd)); |
| 2119 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; |
| 2120 | wfd.ftCreationTime = utc_base_ft; |
| 2121 | wfd.ftLastAccessTime = utc_base_ft; |
| 2122 | wfd.ftLastWriteTime = utc_base_ft; |
| 2123 | strcpy (wfd.cFileName, name); |
| 2124 | } |
| 2125 | else |
| 2126 | { |
| 2127 | if (IS_DIRECTORY_SEP (name[len-1])) |
| 2128 | name[len - 1] = 0; |
| 2129 | |
| 2130 | /* (This is hacky, but helps when doing file completions on |
| 2131 | network drives.) Optimize by using information available from |
| 2132 | active readdir if possible. */ |
| 2133 | len = strlen (dir_pathname); |
| 2134 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) |
| 2135 | len--; |
| 2136 | if (dir_find_handle != INVALID_HANDLE_VALUE |
| 2137 | && strnicmp (name, dir_pathname, len) == 0 |
| 2138 | && IS_DIRECTORY_SEP (name[len]) |
| 2139 | && stricmp (name + len + 1, dir_static.d_name) == 0) |
| 2140 | { |
| 2141 | /* This was the last entry returned by readdir. */ |
| 2142 | wfd = dir_find_data; |
| 2143 | } |
| 2144 | else |
| 2145 | { |
| 2146 | fh = FindFirstFile (name, &wfd); |
| 2147 | if (fh == INVALID_HANDLE_VALUE) |
| 2148 | { |
| 2149 | errno = ENOENT; |
| 2150 | return -1; |
| 2151 | } |
| 2152 | FindClose (fh); |
| 2153 | } |
| 2154 | } |
| 2155 | |
| 2156 | if (!NILP (Vw32_get_true_file_attributes) |
| 2157 | /* No access rights required to get info. */ |
| 2158 | && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, |
| 2159 | FILE_FLAG_BACKUP_SEMANTICS, NULL)) |
| 2160 | != INVALID_HANDLE_VALUE) |
| 2161 | { |
| 2162 | /* This is more accurate in terms of gettting the correct number |
| 2163 | of links, but is quite slow (it is noticable when Emacs is |
| 2164 | making a list of file name completions). */ |
| 2165 | BY_HANDLE_FILE_INFORMATION info; |
| 2166 | |
| 2167 | if (GetFileInformationByHandle (fh, &info)) |
| 2168 | { |
| 2169 | buf->st_nlink = info.nNumberOfLinks; |
| 2170 | /* Might as well use file index to fake inode values, but this |
| 2171 | is not guaranteed to be unique unless we keep a handle open |
| 2172 | all the time (even then there are situations where it is |
| 2173 | not unique). Reputedly, there are at most 48 bits of info |
| 2174 | (on NTFS, presumably less on FAT). */ |
| 2175 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; |
| 2176 | } |
| 2177 | else |
| 2178 | { |
| 2179 | buf->st_nlink = 1; |
| 2180 | fake_inode = 0; |
| 2181 | } |
| 2182 | |
| 2183 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2184 | { |
| 2185 | buf->st_mode = _S_IFDIR; |
| 2186 | } |
| 2187 | else |
| 2188 | { |
| 2189 | switch (GetFileType (fh)) |
| 2190 | { |
| 2191 | case FILE_TYPE_DISK: |
| 2192 | buf->st_mode = _S_IFREG; |
| 2193 | break; |
| 2194 | case FILE_TYPE_PIPE: |
| 2195 | buf->st_mode = _S_IFIFO; |
| 2196 | break; |
| 2197 | case FILE_TYPE_CHAR: |
| 2198 | case FILE_TYPE_UNKNOWN: |
| 2199 | default: |
| 2200 | buf->st_mode = _S_IFCHR; |
| 2201 | } |
| 2202 | } |
| 2203 | CloseHandle (fh); |
| 2204 | } |
| 2205 | else |
| 2206 | { |
| 2207 | /* Don't bother to make this information more accurate. */ |
| 2208 | buf->st_mode = (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? |
| 2209 | _S_IFDIR : _S_IFREG; |
| 2210 | buf->st_nlink = 1; |
| 2211 | fake_inode = 0; |
| 2212 | } |
| 2213 | |
| 2214 | #if 0 |
| 2215 | /* Not sure if there is any point in this. */ |
| 2216 | if (!NILP (Vw32_generate_fake_inodes)) |
| 2217 | fake_inode = generate_inode_val (name); |
| 2218 | else if (fake_inode == 0) |
| 2219 | { |
| 2220 | /* For want of something better, try to make everything unique. */ |
| 2221 | static DWORD gen_num = 0; |
| 2222 | fake_inode = ++gen_num; |
| 2223 | } |
| 2224 | #endif |
| 2225 | |
| 2226 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 2227 | if (sizeof (buf->st_ino) == 2) |
| 2228 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 2229 | else |
| 2230 | buf->st_ino = fake_inode; |
| 2231 | |
| 2232 | /* consider files to belong to current user */ |
| 2233 | buf->st_uid = the_passwd.pw_uid; |
| 2234 | buf->st_gid = the_passwd.pw_gid; |
| 2235 | |
| 2236 | /* volume_info is set indirectly by map_w32_filename */ |
| 2237 | buf->st_dev = volume_info.serialnum; |
| 2238 | buf->st_rdev = volume_info.serialnum; |
| 2239 | |
| 2240 | |
| 2241 | buf->st_size = wfd.nFileSizeLow; |
| 2242 | |
| 2243 | /* Convert timestamps to Unix format. */ |
| 2244 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); |
| 2245 | buf->st_atime = convert_time (wfd.ftLastAccessTime); |
| 2246 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 2247 | buf->st_ctime = convert_time (wfd.ftCreationTime); |
| 2248 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 2249 | |
| 2250 | /* determine rwx permissions */ |
| 2251 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 2252 | permission = _S_IREAD; |
| 2253 | else |
| 2254 | permission = _S_IREAD | _S_IWRITE; |
| 2255 | |
| 2256 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2257 | permission |= _S_IEXEC; |
| 2258 | else if (is_exec (name)) |
| 2259 | permission |= _S_IEXEC; |
| 2260 | |
| 2261 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 2262 | |
| 2263 | return 0; |
| 2264 | } |
| 2265 | |
| 2266 | /* Provide fstat and utime as well as stat for consistent handling of |
| 2267 | file timestamps. */ |
| 2268 | int |
| 2269 | fstat (int desc, struct stat * buf) |
| 2270 | { |
| 2271 | HANDLE fh = (HANDLE) _get_osfhandle (desc); |
| 2272 | BY_HANDLE_FILE_INFORMATION info; |
| 2273 | DWORD fake_inode; |
| 2274 | int permission; |
| 2275 | |
| 2276 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) |
| 2277 | { |
| 2278 | case FILE_TYPE_DISK: |
| 2279 | buf->st_mode = _S_IFREG; |
| 2280 | if (!GetFileInformationByHandle (fh, &info)) |
| 2281 | { |
| 2282 | errno = EACCES; |
| 2283 | return -1; |
| 2284 | } |
| 2285 | break; |
| 2286 | case FILE_TYPE_PIPE: |
| 2287 | buf->st_mode = _S_IFIFO; |
| 2288 | goto non_disk; |
| 2289 | case FILE_TYPE_CHAR: |
| 2290 | case FILE_TYPE_UNKNOWN: |
| 2291 | default: |
| 2292 | buf->st_mode = _S_IFCHR; |
| 2293 | non_disk: |
| 2294 | memset (&info, 0, sizeof (info)); |
| 2295 | info.dwFileAttributes = 0; |
| 2296 | info.ftCreationTime = utc_base_ft; |
| 2297 | info.ftLastAccessTime = utc_base_ft; |
| 2298 | info.ftLastWriteTime = utc_base_ft; |
| 2299 | } |
| 2300 | |
| 2301 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2302 | buf->st_mode = _S_IFDIR; |
| 2303 | |
| 2304 | buf->st_nlink = info.nNumberOfLinks; |
| 2305 | /* Might as well use file index to fake inode values, but this |
| 2306 | is not guaranteed to be unique unless we keep a handle open |
| 2307 | all the time (even then there are situations where it is |
| 2308 | not unique). Reputedly, there are at most 48 bits of info |
| 2309 | (on NTFS, presumably less on FAT). */ |
| 2310 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; |
| 2311 | |
| 2312 | /* MSVC defines _ino_t to be short; other libc's might not. */ |
| 2313 | if (sizeof (buf->st_ino) == 2) |
| 2314 | buf->st_ino = fake_inode ^ (fake_inode >> 16); |
| 2315 | else |
| 2316 | buf->st_ino = fake_inode; |
| 2317 | |
| 2318 | /* consider files to belong to current user */ |
| 2319 | buf->st_uid = 0; |
| 2320 | buf->st_gid = 0; |
| 2321 | |
| 2322 | buf->st_dev = info.dwVolumeSerialNumber; |
| 2323 | buf->st_rdev = info.dwVolumeSerialNumber; |
| 2324 | |
| 2325 | buf->st_size = info.nFileSizeLow; |
| 2326 | |
| 2327 | /* Convert timestamps to Unix format. */ |
| 2328 | buf->st_mtime = convert_time (info.ftLastWriteTime); |
| 2329 | buf->st_atime = convert_time (info.ftLastAccessTime); |
| 2330 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; |
| 2331 | buf->st_ctime = convert_time (info.ftCreationTime); |
| 2332 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; |
| 2333 | |
| 2334 | /* determine rwx permissions */ |
| 2335 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) |
| 2336 | permission = _S_IREAD; |
| 2337 | else |
| 2338 | permission = _S_IREAD | _S_IWRITE; |
| 2339 | |
| 2340 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
| 2341 | permission |= _S_IEXEC; |
| 2342 | else |
| 2343 | { |
| 2344 | #if 0 /* no way of knowing the filename */ |
| 2345 | char * p = strrchr (name, '.'); |
| 2346 | if (p != NULL && |
| 2347 | (stricmp (p, ".exe") == 0 || |
| 2348 | stricmp (p, ".com") == 0 || |
| 2349 | stricmp (p, ".bat") == 0 || |
| 2350 | stricmp (p, ".cmd") == 0)) |
| 2351 | permission |= _S_IEXEC; |
| 2352 | #endif |
| 2353 | } |
| 2354 | |
| 2355 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); |
| 2356 | |
| 2357 | return 0; |
| 2358 | } |
| 2359 | |
| 2360 | int |
| 2361 | utime (const char *name, struct utimbuf *times) |
| 2362 | { |
| 2363 | struct utimbuf deftime; |
| 2364 | HANDLE fh; |
| 2365 | FILETIME mtime; |
| 2366 | FILETIME atime; |
| 2367 | |
| 2368 | if (times == NULL) |
| 2369 | { |
| 2370 | deftime.modtime = deftime.actime = time (NULL); |
| 2371 | times = &deftime; |
| 2372 | } |
| 2373 | |
| 2374 | /* Need write access to set times. */ |
| 2375 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 2376 | 0, OPEN_EXISTING, 0, NULL); |
| 2377 | if (fh) |
| 2378 | { |
| 2379 | convert_from_time_t (times->actime, &atime); |
| 2380 | convert_from_time_t (times->modtime, &mtime); |
| 2381 | if (!SetFileTime (fh, NULL, &atime, &mtime)) |
| 2382 | { |
| 2383 | CloseHandle (fh); |
| 2384 | errno = EACCES; |
| 2385 | return -1; |
| 2386 | } |
| 2387 | CloseHandle (fh); |
| 2388 | } |
| 2389 | else |
| 2390 | { |
| 2391 | errno = EINVAL; |
| 2392 | return -1; |
| 2393 | } |
| 2394 | return 0; |
| 2395 | } |
| 2396 | |
| 2397 | #ifdef HAVE_SOCKETS |
| 2398 | |
| 2399 | /* Wrappers for winsock functions to map between our file descriptors |
| 2400 | and winsock's handles; also set h_errno for convenience. |
| 2401 | |
| 2402 | To allow Emacs to run on systems which don't have winsock support |
| 2403 | installed, we dynamically link to winsock on startup if present, and |
| 2404 | otherwise provide the minimum necessary functionality |
| 2405 | (eg. gethostname). */ |
| 2406 | |
| 2407 | /* function pointers for relevant socket functions */ |
| 2408 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); |
| 2409 | void (PASCAL *pfn_WSASetLastError) (int iError); |
| 2410 | int (PASCAL *pfn_WSAGetLastError) (void); |
| 2411 | int (PASCAL *pfn_socket) (int af, int type, int protocol); |
| 2412 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 2413 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); |
| 2414 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); |
| 2415 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); |
| 2416 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); |
| 2417 | int (PASCAL *pfn_closesocket) (SOCKET s); |
| 2418 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); |
| 2419 | int (PASCAL *pfn_WSACleanup) (void); |
| 2420 | |
| 2421 | u_short (PASCAL *pfn_htons) (u_short hostshort); |
| 2422 | u_short (PASCAL *pfn_ntohs) (u_short netshort); |
| 2423 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); |
| 2424 | int (PASCAL *pfn_gethostname) (char * name, int namelen); |
| 2425 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); |
| 2426 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); |
| 2427 | int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen); |
| 2428 | int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname, |
| 2429 | const char * optval, int optlen); |
| 2430 | int (PASCAL *pfn_listen) (SOCKET s, int backlog); |
| 2431 | int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name, |
| 2432 | int * namelen); |
| 2433 | SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen); |
| 2434 | int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags, |
| 2435 | struct sockaddr * from, int * fromlen); |
| 2436 | int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags, |
| 2437 | const struct sockaddr * to, int tolen); |
| 2438 | |
| 2439 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
| 2440 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); |
| 2441 | #ifndef HANDLE_FLAG_INHERIT |
| 2442 | #define HANDLE_FLAG_INHERIT 1 |
| 2443 | #endif |
| 2444 | |
| 2445 | HANDLE winsock_lib; |
| 2446 | static int winsock_inuse; |
| 2447 | |
| 2448 | BOOL |
| 2449 | term_winsock (void) |
| 2450 | { |
| 2451 | if (winsock_lib != NULL && winsock_inuse == 0) |
| 2452 | { |
| 2453 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
| 2454 | after WSAStartup returns successfully, but it seems reasonable |
| 2455 | to allow unloading winsock anyway in that case. */ |
| 2456 | if (pfn_WSACleanup () == 0 || |
| 2457 | pfn_WSAGetLastError () == WSAENETDOWN) |
| 2458 | { |
| 2459 | if (FreeLibrary (winsock_lib)) |
| 2460 | winsock_lib = NULL; |
| 2461 | return TRUE; |
| 2462 | } |
| 2463 | } |
| 2464 | return FALSE; |
| 2465 | } |
| 2466 | |
| 2467 | BOOL |
| 2468 | init_winsock (int load_now) |
| 2469 | { |
| 2470 | WSADATA winsockData; |
| 2471 | |
| 2472 | if (winsock_lib != NULL) |
| 2473 | return TRUE; |
| 2474 | |
| 2475 | pfn_SetHandleInformation = NULL; |
| 2476 | pfn_SetHandleInformation |
| 2477 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), |
| 2478 | "SetHandleInformation"); |
| 2479 | |
| 2480 | winsock_lib = LoadLibrary ("wsock32.dll"); |
| 2481 | |
| 2482 | if (winsock_lib != NULL) |
| 2483 | { |
| 2484 | /* dynamically link to socket functions */ |
| 2485 | |
| 2486 | #define LOAD_PROC(fn) \ |
| 2487 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ |
| 2488 | goto fail; |
| 2489 | |
| 2490 | LOAD_PROC( WSAStartup ); |
| 2491 | LOAD_PROC( WSASetLastError ); |
| 2492 | LOAD_PROC( WSAGetLastError ); |
| 2493 | LOAD_PROC( socket ); |
| 2494 | LOAD_PROC( bind ); |
| 2495 | LOAD_PROC( connect ); |
| 2496 | LOAD_PROC( ioctlsocket ); |
| 2497 | LOAD_PROC( recv ); |
| 2498 | LOAD_PROC( send ); |
| 2499 | LOAD_PROC( closesocket ); |
| 2500 | LOAD_PROC( shutdown ); |
| 2501 | LOAD_PROC( htons ); |
| 2502 | LOAD_PROC( ntohs ); |
| 2503 | LOAD_PROC( inet_addr ); |
| 2504 | LOAD_PROC( gethostname ); |
| 2505 | LOAD_PROC( gethostbyname ); |
| 2506 | LOAD_PROC( getservbyname ); |
| 2507 | LOAD_PROC( getpeername ); |
| 2508 | LOAD_PROC( WSACleanup ); |
| 2509 | LOAD_PROC( setsockopt ); |
| 2510 | LOAD_PROC( listen ); |
| 2511 | LOAD_PROC( getsockname ); |
| 2512 | LOAD_PROC( accept ); |
| 2513 | LOAD_PROC( recvfrom ); |
| 2514 | LOAD_PROC( sendto ); |
| 2515 | #undef LOAD_PROC |
| 2516 | |
| 2517 | /* specify version 1.1 of winsock */ |
| 2518 | if (pfn_WSAStartup (0x101, &winsockData) == 0) |
| 2519 | { |
| 2520 | if (winsockData.wVersion != 0x101) |
| 2521 | goto fail; |
| 2522 | |
| 2523 | if (!load_now) |
| 2524 | { |
| 2525 | /* Report that winsock exists and is usable, but leave |
| 2526 | socket functions disabled. I am assuming that calling |
| 2527 | WSAStartup does not require any network interaction, |
| 2528 | and in particular does not cause or require a dial-up |
| 2529 | connection to be established. */ |
| 2530 | |
| 2531 | pfn_WSACleanup (); |
| 2532 | FreeLibrary (winsock_lib); |
| 2533 | winsock_lib = NULL; |
| 2534 | } |
| 2535 | winsock_inuse = 0; |
| 2536 | return TRUE; |
| 2537 | } |
| 2538 | |
| 2539 | fail: |
| 2540 | FreeLibrary (winsock_lib); |
| 2541 | winsock_lib = NULL; |
| 2542 | } |
| 2543 | |
| 2544 | return FALSE; |
| 2545 | } |
| 2546 | |
| 2547 | |
| 2548 | int h_errno = 0; |
| 2549 | |
| 2550 | /* function to set h_errno for compatability; map winsock error codes to |
| 2551 | normal system codes where they overlap (non-overlapping definitions |
| 2552 | are already in <sys/socket.h> */ |
| 2553 | static void set_errno () |
| 2554 | { |
| 2555 | if (winsock_lib == NULL) |
| 2556 | h_errno = EINVAL; |
| 2557 | else |
| 2558 | h_errno = pfn_WSAGetLastError (); |
| 2559 | |
| 2560 | switch (h_errno) |
| 2561 | { |
| 2562 | case WSAEACCES: h_errno = EACCES; break; |
| 2563 | case WSAEBADF: h_errno = EBADF; break; |
| 2564 | case WSAEFAULT: h_errno = EFAULT; break; |
| 2565 | case WSAEINTR: h_errno = EINTR; break; |
| 2566 | case WSAEINVAL: h_errno = EINVAL; break; |
| 2567 | case WSAEMFILE: h_errno = EMFILE; break; |
| 2568 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; |
| 2569 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; |
| 2570 | } |
| 2571 | errno = h_errno; |
| 2572 | } |
| 2573 | |
| 2574 | static void check_errno () |
| 2575 | { |
| 2576 | if (h_errno == 0 && winsock_lib != NULL) |
| 2577 | pfn_WSASetLastError (0); |
| 2578 | } |
| 2579 | |
| 2580 | /* Extend strerror to handle the winsock-specific error codes. */ |
| 2581 | struct { |
| 2582 | int errnum; |
| 2583 | char * msg; |
| 2584 | } _wsa_errlist[] = { |
| 2585 | WSAEINTR , "Interrupted function call", |
| 2586 | WSAEBADF , "Bad file descriptor", |
| 2587 | WSAEACCES , "Permission denied", |
| 2588 | WSAEFAULT , "Bad address", |
| 2589 | WSAEINVAL , "Invalid argument", |
| 2590 | WSAEMFILE , "Too many open files", |
| 2591 | |
| 2592 | WSAEWOULDBLOCK , "Resource temporarily unavailable", |
| 2593 | WSAEINPROGRESS , "Operation now in progress", |
| 2594 | WSAEALREADY , "Operation already in progress", |
| 2595 | WSAENOTSOCK , "Socket operation on non-socket", |
| 2596 | WSAEDESTADDRREQ , "Destination address required", |
| 2597 | WSAEMSGSIZE , "Message too long", |
| 2598 | WSAEPROTOTYPE , "Protocol wrong type for socket", |
| 2599 | WSAENOPROTOOPT , "Bad protocol option", |
| 2600 | WSAEPROTONOSUPPORT , "Protocol not supported", |
| 2601 | WSAESOCKTNOSUPPORT , "Socket type not supported", |
| 2602 | WSAEOPNOTSUPP , "Operation not supported", |
| 2603 | WSAEPFNOSUPPORT , "Protocol family not supported", |
| 2604 | WSAEAFNOSUPPORT , "Address family not supported by protocol family", |
| 2605 | WSAEADDRINUSE , "Address already in use", |
| 2606 | WSAEADDRNOTAVAIL , "Cannot assign requested address", |
| 2607 | WSAENETDOWN , "Network is down", |
| 2608 | WSAENETUNREACH , "Network is unreachable", |
| 2609 | WSAENETRESET , "Network dropped connection on reset", |
| 2610 | WSAECONNABORTED , "Software caused connection abort", |
| 2611 | WSAECONNRESET , "Connection reset by peer", |
| 2612 | WSAENOBUFS , "No buffer space available", |
| 2613 | WSAEISCONN , "Socket is already connected", |
| 2614 | WSAENOTCONN , "Socket is not connected", |
| 2615 | WSAESHUTDOWN , "Cannot send after socket shutdown", |
| 2616 | WSAETOOMANYREFS , "Too many references", /* not sure */ |
| 2617 | WSAETIMEDOUT , "Connection timed out", |
| 2618 | WSAECONNREFUSED , "Connection refused", |
| 2619 | WSAELOOP , "Network loop", /* not sure */ |
| 2620 | WSAENAMETOOLONG , "Name is too long", |
| 2621 | WSAEHOSTDOWN , "Host is down", |
| 2622 | WSAEHOSTUNREACH , "No route to host", |
| 2623 | WSAENOTEMPTY , "Buffer not empty", /* not sure */ |
| 2624 | WSAEPROCLIM , "Too many processes", |
| 2625 | WSAEUSERS , "Too many users", /* not sure */ |
| 2626 | WSAEDQUOT , "Double quote in host name", /* really not sure */ |
| 2627 | WSAESTALE , "Data is stale", /* not sure */ |
| 2628 | WSAEREMOTE , "Remote error", /* not sure */ |
| 2629 | |
| 2630 | WSASYSNOTREADY , "Network subsystem is unavailable", |
| 2631 | WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range", |
| 2632 | WSANOTINITIALISED , "Winsock not initialized successfully", |
| 2633 | WSAEDISCON , "Graceful shutdown in progress", |
| 2634 | #ifdef WSAENOMORE |
| 2635 | WSAENOMORE , "No more operations allowed", /* not sure */ |
| 2636 | WSAECANCELLED , "Operation cancelled", /* not sure */ |
| 2637 | WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider", |
| 2638 | WSAEINVALIDPROVIDER , "Invalid service provider version number", |
| 2639 | WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider", |
| 2640 | WSASYSCALLFAILURE , "System call failured", |
| 2641 | WSASERVICE_NOT_FOUND , "Service not found", /* not sure */ |
| 2642 | WSATYPE_NOT_FOUND , "Class type not found", |
| 2643 | WSA_E_NO_MORE , "No more resources available", /* really not sure */ |
| 2644 | WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */ |
| 2645 | WSAEREFUSED , "Operation refused", /* not sure */ |
| 2646 | #endif |
| 2647 | |
| 2648 | WSAHOST_NOT_FOUND , "Host not found", |
| 2649 | WSATRY_AGAIN , "Authoritative host not found during name lookup", |
| 2650 | WSANO_RECOVERY , "Non-recoverable error during name lookup", |
| 2651 | WSANO_DATA , "Valid name, no data record of requested type", |
| 2652 | |
| 2653 | -1, NULL |
| 2654 | }; |
| 2655 | |
| 2656 | char * |
| 2657 | sys_strerror(int error_no) |
| 2658 | { |
| 2659 | int i; |
| 2660 | static char unknown_msg[40]; |
| 2661 | |
| 2662 | if (error_no >= 0 && error_no < sys_nerr) |
| 2663 | return sys_errlist[error_no]; |
| 2664 | |
| 2665 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) |
| 2666 | if (_wsa_errlist[i].errnum == error_no) |
| 2667 | return _wsa_errlist[i].msg; |
| 2668 | |
| 2669 | sprintf(unknown_msg, "Unidentified error: %d", error_no); |
| 2670 | return unknown_msg; |
| 2671 | } |
| 2672 | |
| 2673 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
| 2674 | but I believe the method of keeping the socket handle separate (and |
| 2675 | insuring it is not inheritable) is the correct one. */ |
| 2676 | |
| 2677 | //#define SOCK_REPLACE_HANDLE |
| 2678 | |
| 2679 | #ifdef SOCK_REPLACE_HANDLE |
| 2680 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) |
| 2681 | #else |
| 2682 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) |
| 2683 | #endif |
| 2684 | |
| 2685 | int socket_to_fd (SOCKET s); |
| 2686 | |
| 2687 | int |
| 2688 | sys_socket(int af, int type, int protocol) |
| 2689 | { |
| 2690 | SOCKET s; |
| 2691 | |
| 2692 | if (winsock_lib == NULL) |
| 2693 | { |
| 2694 | h_errno = ENETDOWN; |
| 2695 | return INVALID_SOCKET; |
| 2696 | } |
| 2697 | |
| 2698 | check_errno (); |
| 2699 | |
| 2700 | /* call the real socket function */ |
| 2701 | s = pfn_socket (af, type, protocol); |
| 2702 | |
| 2703 | if (s != INVALID_SOCKET) |
| 2704 | return socket_to_fd (s); |
| 2705 | |
| 2706 | set_errno (); |
| 2707 | return -1; |
| 2708 | } |
| 2709 | |
| 2710 | /* Convert a SOCKET to a file descriptor. */ |
| 2711 | int |
| 2712 | socket_to_fd (SOCKET s) |
| 2713 | { |
| 2714 | int fd; |
| 2715 | child_process * cp; |
| 2716 | |
| 2717 | /* Although under NT 3.5 _open_osfhandle will accept a socket |
| 2718 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, |
| 2719 | that does not work under NT 3.1. However, we can get the same |
| 2720 | effect by using a backdoor function to replace an existing |
| 2721 | descriptor handle with the one we want. */ |
| 2722 | |
| 2723 | /* allocate a file descriptor (with appropriate flags) */ |
| 2724 | fd = _open ("NUL:", _O_RDWR); |
| 2725 | if (fd >= 0) |
| 2726 | { |
| 2727 | #ifdef SOCK_REPLACE_HANDLE |
| 2728 | /* now replace handle to NUL with our socket handle */ |
| 2729 | CloseHandle ((HANDLE) _get_osfhandle (fd)); |
| 2730 | _free_osfhnd (fd); |
| 2731 | _set_osfhnd (fd, s); |
| 2732 | /* setmode (fd, _O_BINARY); */ |
| 2733 | #else |
| 2734 | /* Make a non-inheritable copy of the socket handle. Note |
| 2735 | that it is possible that sockets aren't actually kernel |
| 2736 | handles, which appears to be the case on Windows 9x when |
| 2737 | the MS Proxy winsock client is installed. */ |
| 2738 | { |
| 2739 | /* Apparently there is a bug in NT 3.51 with some service |
| 2740 | packs, which prevents using DuplicateHandle to make a |
| 2741 | socket handle non-inheritable (causes WSACleanup to |
| 2742 | hang). The work-around is to use SetHandleInformation |
| 2743 | instead if it is available and implemented. */ |
| 2744 | if (pfn_SetHandleInformation) |
| 2745 | { |
| 2746 | pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0); |
| 2747 | } |
| 2748 | else |
| 2749 | { |
| 2750 | HANDLE parent = GetCurrentProcess (); |
| 2751 | HANDLE new_s = INVALID_HANDLE_VALUE; |
| 2752 | |
| 2753 | if (DuplicateHandle (parent, |
| 2754 | (HANDLE) s, |
| 2755 | parent, |
| 2756 | &new_s, |
| 2757 | 0, |
| 2758 | FALSE, |
| 2759 | DUPLICATE_SAME_ACCESS)) |
| 2760 | { |
| 2761 | /* It is possible that DuplicateHandle succeeds even |
| 2762 | though the socket wasn't really a kernel handle, |
| 2763 | because a real handle has the same value. So |
| 2764 | test whether the new handle really is a socket. */ |
| 2765 | long nonblocking = 0; |
| 2766 | if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0) |
| 2767 | { |
| 2768 | pfn_closesocket (s); |
| 2769 | s = (SOCKET) new_s; |
| 2770 | } |
| 2771 | else |
| 2772 | { |
| 2773 | CloseHandle (new_s); |
| 2774 | } |
| 2775 | } |
| 2776 | } |
| 2777 | } |
| 2778 | fd_info[fd].hnd = (HANDLE) s; |
| 2779 | #endif |
| 2780 | |
| 2781 | /* set our own internal flags */ |
| 2782 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; |
| 2783 | |
| 2784 | cp = new_child (); |
| 2785 | if (cp) |
| 2786 | { |
| 2787 | cp->fd = fd; |
| 2788 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 2789 | |
| 2790 | /* attach child_process to fd_info */ |
| 2791 | if (fd_info[ fd ].cp != NULL) |
| 2792 | { |
| 2793 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); |
| 2794 | abort (); |
| 2795 | } |
| 2796 | |
| 2797 | fd_info[ fd ].cp = cp; |
| 2798 | |
| 2799 | /* success! */ |
| 2800 | winsock_inuse++; /* count open sockets */ |
| 2801 | return fd; |
| 2802 | } |
| 2803 | |
| 2804 | /* clean up */ |
| 2805 | _close (fd); |
| 2806 | } |
| 2807 | pfn_closesocket (s); |
| 2808 | h_errno = EMFILE; |
| 2809 | return -1; |
| 2810 | } |
| 2811 | |
| 2812 | |
| 2813 | int |
| 2814 | sys_bind (int s, const struct sockaddr * addr, int namelen) |
| 2815 | { |
| 2816 | if (winsock_lib == NULL) |
| 2817 | { |
| 2818 | h_errno = ENOTSOCK; |
| 2819 | return SOCKET_ERROR; |
| 2820 | } |
| 2821 | |
| 2822 | check_errno (); |
| 2823 | if (fd_info[s].flags & FILE_SOCKET) |
| 2824 | { |
| 2825 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); |
| 2826 | if (rc == SOCKET_ERROR) |
| 2827 | set_errno (); |
| 2828 | return rc; |
| 2829 | } |
| 2830 | h_errno = ENOTSOCK; |
| 2831 | return SOCKET_ERROR; |
| 2832 | } |
| 2833 | |
| 2834 | |
| 2835 | int |
| 2836 | sys_connect (int s, const struct sockaddr * name, int namelen) |
| 2837 | { |
| 2838 | if (winsock_lib == NULL) |
| 2839 | { |
| 2840 | h_errno = ENOTSOCK; |
| 2841 | return SOCKET_ERROR; |
| 2842 | } |
| 2843 | |
| 2844 | check_errno (); |
| 2845 | if (fd_info[s].flags & FILE_SOCKET) |
| 2846 | { |
| 2847 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); |
| 2848 | if (rc == SOCKET_ERROR) |
| 2849 | set_errno (); |
| 2850 | return rc; |
| 2851 | } |
| 2852 | h_errno = ENOTSOCK; |
| 2853 | return SOCKET_ERROR; |
| 2854 | } |
| 2855 | |
| 2856 | u_short |
| 2857 | sys_htons (u_short hostshort) |
| 2858 | { |
| 2859 | return (winsock_lib != NULL) ? |
| 2860 | pfn_htons (hostshort) : hostshort; |
| 2861 | } |
| 2862 | |
| 2863 | u_short |
| 2864 | sys_ntohs (u_short netshort) |
| 2865 | { |
| 2866 | return (winsock_lib != NULL) ? |
| 2867 | pfn_ntohs (netshort) : netshort; |
| 2868 | } |
| 2869 | |
| 2870 | unsigned long |
| 2871 | sys_inet_addr (const char * cp) |
| 2872 | { |
| 2873 | return (winsock_lib != NULL) ? |
| 2874 | pfn_inet_addr (cp) : INADDR_NONE; |
| 2875 | } |
| 2876 | |
| 2877 | int |
| 2878 | sys_gethostname (char * name, int namelen) |
| 2879 | { |
| 2880 | if (winsock_lib != NULL) |
| 2881 | return pfn_gethostname (name, namelen); |
| 2882 | |
| 2883 | if (namelen > MAX_COMPUTERNAME_LENGTH) |
| 2884 | return !GetComputerName (name, (DWORD *)&namelen); |
| 2885 | |
| 2886 | h_errno = EFAULT; |
| 2887 | return SOCKET_ERROR; |
| 2888 | } |
| 2889 | |
| 2890 | struct hostent * |
| 2891 | sys_gethostbyname(const char * name) |
| 2892 | { |
| 2893 | struct hostent * host; |
| 2894 | |
| 2895 | if (winsock_lib == NULL) |
| 2896 | { |
| 2897 | h_errno = ENETDOWN; |
| 2898 | return NULL; |
| 2899 | } |
| 2900 | |
| 2901 | check_errno (); |
| 2902 | host = pfn_gethostbyname (name); |
| 2903 | if (!host) |
| 2904 | set_errno (); |
| 2905 | return host; |
| 2906 | } |
| 2907 | |
| 2908 | struct servent * |
| 2909 | sys_getservbyname(const char * name, const char * proto) |
| 2910 | { |
| 2911 | struct servent * serv; |
| 2912 | |
| 2913 | if (winsock_lib == NULL) |
| 2914 | { |
| 2915 | h_errno = ENETDOWN; |
| 2916 | return NULL; |
| 2917 | } |
| 2918 | |
| 2919 | check_errno (); |
| 2920 | serv = pfn_getservbyname (name, proto); |
| 2921 | if (!serv) |
| 2922 | set_errno (); |
| 2923 | return serv; |
| 2924 | } |
| 2925 | |
| 2926 | int |
| 2927 | sys_getpeername (int s, struct sockaddr *addr, int * namelen) |
| 2928 | { |
| 2929 | if (winsock_lib == NULL) |
| 2930 | { |
| 2931 | h_errno = ENETDOWN; |
| 2932 | return SOCKET_ERROR; |
| 2933 | } |
| 2934 | |
| 2935 | check_errno (); |
| 2936 | if (fd_info[s].flags & FILE_SOCKET) |
| 2937 | { |
| 2938 | int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen); |
| 2939 | if (rc == SOCKET_ERROR) |
| 2940 | set_errno (); |
| 2941 | return rc; |
| 2942 | } |
| 2943 | h_errno = ENOTSOCK; |
| 2944 | return SOCKET_ERROR; |
| 2945 | } |
| 2946 | |
| 2947 | |
| 2948 | int |
| 2949 | sys_shutdown (int s, int how) |
| 2950 | { |
| 2951 | if (winsock_lib == NULL) |
| 2952 | { |
| 2953 | h_errno = ENETDOWN; |
| 2954 | return SOCKET_ERROR; |
| 2955 | } |
| 2956 | |
| 2957 | check_errno (); |
| 2958 | if (fd_info[s].flags & FILE_SOCKET) |
| 2959 | { |
| 2960 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); |
| 2961 | if (rc == SOCKET_ERROR) |
| 2962 | set_errno (); |
| 2963 | return rc; |
| 2964 | } |
| 2965 | h_errno = ENOTSOCK; |
| 2966 | return SOCKET_ERROR; |
| 2967 | } |
| 2968 | |
| 2969 | int |
| 2970 | sys_setsockopt (int s, int level, int optname, const char * optval, int optlen) |
| 2971 | { |
| 2972 | if (winsock_lib == NULL) |
| 2973 | { |
| 2974 | h_errno = ENETDOWN; |
| 2975 | return SOCKET_ERROR; |
| 2976 | } |
| 2977 | |
| 2978 | check_errno (); |
| 2979 | if (fd_info[s].flags & FILE_SOCKET) |
| 2980 | { |
| 2981 | int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname, |
| 2982 | optval, optlen); |
| 2983 | if (rc == SOCKET_ERROR) |
| 2984 | set_errno (); |
| 2985 | return rc; |
| 2986 | } |
| 2987 | h_errno = ENOTSOCK; |
| 2988 | return SOCKET_ERROR; |
| 2989 | } |
| 2990 | |
| 2991 | int |
| 2992 | sys_listen (int s, int backlog) |
| 2993 | { |
| 2994 | if (winsock_lib == NULL) |
| 2995 | { |
| 2996 | h_errno = ENETDOWN; |
| 2997 | return SOCKET_ERROR; |
| 2998 | } |
| 2999 | |
| 3000 | check_errno (); |
| 3001 | if (fd_info[s].flags & FILE_SOCKET) |
| 3002 | { |
| 3003 | int rc = pfn_listen (SOCK_HANDLE (s), backlog); |
| 3004 | if (rc == SOCKET_ERROR) |
| 3005 | set_errno (); |
| 3006 | return rc; |
| 3007 | } |
| 3008 | h_errno = ENOTSOCK; |
| 3009 | return SOCKET_ERROR; |
| 3010 | } |
| 3011 | |
| 3012 | int |
| 3013 | sys_getsockname (int s, struct sockaddr * name, int * namelen) |
| 3014 | { |
| 3015 | if (winsock_lib == NULL) |
| 3016 | { |
| 3017 | h_errno = ENETDOWN; |
| 3018 | return SOCKET_ERROR; |
| 3019 | } |
| 3020 | |
| 3021 | check_errno (); |
| 3022 | if (fd_info[s].flags & FILE_SOCKET) |
| 3023 | { |
| 3024 | int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen); |
| 3025 | if (rc == SOCKET_ERROR) |
| 3026 | set_errno (); |
| 3027 | return rc; |
| 3028 | } |
| 3029 | h_errno = ENOTSOCK; |
| 3030 | return SOCKET_ERROR; |
| 3031 | } |
| 3032 | |
| 3033 | int |
| 3034 | sys_accept (int s, struct sockaddr * addr, int * addrlen) |
| 3035 | { |
| 3036 | if (winsock_lib == NULL) |
| 3037 | { |
| 3038 | h_errno = ENETDOWN; |
| 3039 | return -1; |
| 3040 | } |
| 3041 | |
| 3042 | check_errno (); |
| 3043 | if (fd_info[s].flags & FILE_SOCKET) |
| 3044 | { |
| 3045 | SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen); |
| 3046 | if (t != INVALID_SOCKET) |
| 3047 | return socket_to_fd (t); |
| 3048 | |
| 3049 | set_errno (); |
| 3050 | return -1; |
| 3051 | } |
| 3052 | h_errno = ENOTSOCK; |
| 3053 | return -1; |
| 3054 | } |
| 3055 | |
| 3056 | int |
| 3057 | sys_recvfrom (int s, char * buf, int len, int flags, |
| 3058 | struct sockaddr * from, int * fromlen) |
| 3059 | { |
| 3060 | if (winsock_lib == NULL) |
| 3061 | { |
| 3062 | h_errno = ENETDOWN; |
| 3063 | return SOCKET_ERROR; |
| 3064 | } |
| 3065 | |
| 3066 | check_errno (); |
| 3067 | if (fd_info[s].flags & FILE_SOCKET) |
| 3068 | { |
| 3069 | int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen); |
| 3070 | if (rc == SOCKET_ERROR) |
| 3071 | set_errno (); |
| 3072 | return rc; |
| 3073 | } |
| 3074 | h_errno = ENOTSOCK; |
| 3075 | return SOCKET_ERROR; |
| 3076 | } |
| 3077 | |
| 3078 | int |
| 3079 | sys_sendto (int s, const char * buf, int len, int flags, |
| 3080 | const struct sockaddr * to, int tolen) |
| 3081 | { |
| 3082 | if (winsock_lib == NULL) |
| 3083 | { |
| 3084 | h_errno = ENETDOWN; |
| 3085 | return SOCKET_ERROR; |
| 3086 | } |
| 3087 | |
| 3088 | check_errno (); |
| 3089 | if (fd_info[s].flags & FILE_SOCKET) |
| 3090 | { |
| 3091 | int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen); |
| 3092 | if (rc == SOCKET_ERROR) |
| 3093 | set_errno (); |
| 3094 | return rc; |
| 3095 | } |
| 3096 | h_errno = ENOTSOCK; |
| 3097 | return SOCKET_ERROR; |
| 3098 | } |
| 3099 | |
| 3100 | /* Windows does not have an fcntl function. Provide an implementation |
| 3101 | solely for making sockets non-blocking. */ |
| 3102 | int |
| 3103 | fcntl (int s, int cmd, int options) |
| 3104 | { |
| 3105 | if (winsock_lib == NULL) |
| 3106 | { |
| 3107 | h_errno = ENETDOWN; |
| 3108 | return -1; |
| 3109 | } |
| 3110 | |
| 3111 | check_errno (); |
| 3112 | if (fd_info[s].flags & FILE_SOCKET) |
| 3113 | { |
| 3114 | if (cmd == F_SETFL && options == O_NDELAY) |
| 3115 | { |
| 3116 | unsigned long nblock = 1; |
| 3117 | int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock); |
| 3118 | if (rc == SOCKET_ERROR) |
| 3119 | set_errno(); |
| 3120 | /* Keep track of the fact that we set this to non-blocking. */ |
| 3121 | fd_info[s].flags |= FILE_NDELAY; |
| 3122 | return rc; |
| 3123 | } |
| 3124 | else |
| 3125 | { |
| 3126 | h_errno = EINVAL; |
| 3127 | return SOCKET_ERROR; |
| 3128 | } |
| 3129 | } |
| 3130 | h_errno = ENOTSOCK; |
| 3131 | return SOCKET_ERROR; |
| 3132 | } |
| 3133 | |
| 3134 | #endif /* HAVE_SOCKETS */ |
| 3135 | |
| 3136 | |
| 3137 | /* Shadow main io functions: we need to handle pipes and sockets more |
| 3138 | intelligently, and implement non-blocking mode as well. */ |
| 3139 | |
| 3140 | int |
| 3141 | sys_close (int fd) |
| 3142 | { |
| 3143 | int rc; |
| 3144 | |
| 3145 | if (fd < 0 || fd >= MAXDESC) |
| 3146 | { |
| 3147 | errno = EBADF; |
| 3148 | return -1; |
| 3149 | } |
| 3150 | |
| 3151 | if (fd_info[fd].cp) |
| 3152 | { |
| 3153 | child_process * cp = fd_info[fd].cp; |
| 3154 | |
| 3155 | fd_info[fd].cp = NULL; |
| 3156 | |
| 3157 | if (CHILD_ACTIVE (cp)) |
| 3158 | { |
| 3159 | /* if last descriptor to active child_process then cleanup */ |
| 3160 | int i; |
| 3161 | for (i = 0; i < MAXDESC; i++) |
| 3162 | { |
| 3163 | if (i == fd) |
| 3164 | continue; |
| 3165 | if (fd_info[i].cp == cp) |
| 3166 | break; |
| 3167 | } |
| 3168 | if (i == MAXDESC) |
| 3169 | { |
| 3170 | #ifdef HAVE_SOCKETS |
| 3171 | if (fd_info[fd].flags & FILE_SOCKET) |
| 3172 | { |
| 3173 | #ifndef SOCK_REPLACE_HANDLE |
| 3174 | if (winsock_lib == NULL) abort (); |
| 3175 | |
| 3176 | pfn_shutdown (SOCK_HANDLE (fd), 2); |
| 3177 | rc = pfn_closesocket (SOCK_HANDLE (fd)); |
| 3178 | #endif |
| 3179 | winsock_inuse--; /* count open sockets */ |
| 3180 | } |
| 3181 | #endif |
| 3182 | delete_child (cp); |
| 3183 | } |
| 3184 | } |
| 3185 | } |
| 3186 | |
| 3187 | /* Note that sockets do not need special treatment here (at least on |
| 3188 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
| 3189 | closesocket is equivalent to CloseHandle, which is to be expected |
| 3190 | because socket handles are fully fledged kernel handles. */ |
| 3191 | rc = _close (fd); |
| 3192 | |
| 3193 | if (rc == 0) |
| 3194 | fd_info[fd].flags = 0; |
| 3195 | |
| 3196 | return rc; |
| 3197 | } |
| 3198 | |
| 3199 | int |
| 3200 | sys_dup (int fd) |
| 3201 | { |
| 3202 | int new_fd; |
| 3203 | |
| 3204 | new_fd = _dup (fd); |
| 3205 | if (new_fd >= 0) |
| 3206 | { |
| 3207 | /* duplicate our internal info as well */ |
| 3208 | fd_info[new_fd] = fd_info[fd]; |
| 3209 | } |
| 3210 | return new_fd; |
| 3211 | } |
| 3212 | |
| 3213 | |
| 3214 | int |
| 3215 | sys_dup2 (int src, int dst) |
| 3216 | { |
| 3217 | int rc; |
| 3218 | |
| 3219 | if (dst < 0 || dst >= MAXDESC) |
| 3220 | { |
| 3221 | errno = EBADF; |
| 3222 | return -1; |
| 3223 | } |
| 3224 | |
| 3225 | /* make sure we close the destination first if it's a pipe or socket */ |
| 3226 | if (src != dst && fd_info[dst].flags != 0) |
| 3227 | sys_close (dst); |
| 3228 | |
| 3229 | rc = _dup2 (src, dst); |
| 3230 | if (rc == 0) |
| 3231 | { |
| 3232 | /* duplicate our internal info as well */ |
| 3233 | fd_info[dst] = fd_info[src]; |
| 3234 | } |
| 3235 | return rc; |
| 3236 | } |
| 3237 | |
| 3238 | /* Unix pipe() has only one arg */ |
| 3239 | int |
| 3240 | sys_pipe (int * phandles) |
| 3241 | { |
| 3242 | int rc; |
| 3243 | unsigned flags; |
| 3244 | |
| 3245 | /* make pipe handles non-inheritable; when we spawn a child, we |
| 3246 | replace the relevant handle with an inheritable one. Also put |
| 3247 | pipes into binary mode; we will do text mode translation ourselves |
| 3248 | if required. */ |
| 3249 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); |
| 3250 | |
| 3251 | if (rc == 0) |
| 3252 | { |
| 3253 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
| 3254 | fd_info[phandles[0]].flags = flags; |
| 3255 | |
| 3256 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
| 3257 | fd_info[phandles[1]].flags = flags; |
| 3258 | } |
| 3259 | |
| 3260 | return rc; |
| 3261 | } |
| 3262 | |
| 3263 | /* From ntproc.c */ |
| 3264 | extern Lisp_Object Vw32_pipe_read_delay; |
| 3265 | |
| 3266 | /* Function to do blocking read of one byte, needed to implement |
| 3267 | select. It is only allowed on sockets and pipes. */ |
| 3268 | int |
| 3269 | _sys_read_ahead (int fd) |
| 3270 | { |
| 3271 | child_process * cp; |
| 3272 | int rc; |
| 3273 | |
| 3274 | if (fd < 0 || fd >= MAXDESC) |
| 3275 | return STATUS_READ_ERROR; |
| 3276 | |
| 3277 | cp = fd_info[fd].cp; |
| 3278 | |
| 3279 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) |
| 3280 | return STATUS_READ_ERROR; |
| 3281 | |
| 3282 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 |
| 3283 | || (fd_info[fd].flags & FILE_READ) == 0) |
| 3284 | { |
| 3285 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); |
| 3286 | abort (); |
| 3287 | } |
| 3288 | |
| 3289 | cp->status = STATUS_READ_IN_PROGRESS; |
| 3290 | |
| 3291 | if (fd_info[fd].flags & FILE_PIPE) |
| 3292 | { |
| 3293 | rc = _read (fd, &cp->chr, sizeof (char)); |
| 3294 | |
| 3295 | /* Give subprocess time to buffer some more output for us before |
| 3296 | reporting that input is available; we need this because Windows 95 |
| 3297 | connects DOS programs to pipes by making the pipe appear to be |
| 3298 | the normal console stdout - as a result most DOS programs will |
| 3299 | write to stdout without buffering, ie. one character at a |
| 3300 | time. Even some W32 programs do this - "dir" in a command |
| 3301 | shell on NT is very slow if we don't do this. */ |
| 3302 | if (rc > 0) |
| 3303 | { |
| 3304 | int wait = XINT (Vw32_pipe_read_delay); |
| 3305 | |
| 3306 | if (wait > 0) |
| 3307 | Sleep (wait); |
| 3308 | else if (wait < 0) |
| 3309 | while (++wait <= 0) |
| 3310 | /* Yield remainder of our time slice, effectively giving a |
| 3311 | temporary priority boost to the child process. */ |
| 3312 | Sleep (0); |
| 3313 | } |
| 3314 | } |
| 3315 | #ifdef HAVE_SOCKETS |
| 3316 | else if (fd_info[fd].flags & FILE_SOCKET) |
| 3317 | { |
| 3318 | unsigned long nblock = 0; |
| 3319 | /* We always want this to block, so temporarily disable NDELAY. */ |
| 3320 | if (fd_info[fd].flags & FILE_NDELAY) |
| 3321 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 3322 | |
| 3323 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); |
| 3324 | |
| 3325 | if (fd_info[fd].flags & FILE_NDELAY) |
| 3326 | { |
| 3327 | nblock = 1; |
| 3328 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); |
| 3329 | } |
| 3330 | } |
| 3331 | #endif |
| 3332 | |
| 3333 | if (rc == sizeof (char)) |
| 3334 | cp->status = STATUS_READ_SUCCEEDED; |
| 3335 | else |
| 3336 | cp->status = STATUS_READ_FAILED; |
| 3337 | |
| 3338 | return cp->status; |
| 3339 | } |
| 3340 | |
| 3341 | int |
| 3342 | sys_read (int fd, char * buffer, unsigned int count) |
| 3343 | { |
| 3344 | int nchars; |
| 3345 | int to_read; |
| 3346 | DWORD waiting; |
| 3347 | char * orig_buffer = buffer; |
| 3348 | |
| 3349 | if (fd < 0 || fd >= MAXDESC) |
| 3350 | { |
| 3351 | errno = EBADF; |
| 3352 | return -1; |
| 3353 | } |
| 3354 | |
| 3355 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 3356 | { |
| 3357 | child_process *cp = fd_info[fd].cp; |
| 3358 | |
| 3359 | if ((fd_info[fd].flags & FILE_READ) == 0) |
| 3360 | { |
| 3361 | errno = EBADF; |
| 3362 | return -1; |
| 3363 | } |
| 3364 | |
| 3365 | nchars = 0; |
| 3366 | |
| 3367 | /* re-read CR carried over from last read */ |
| 3368 | if (fd_info[fd].flags & FILE_LAST_CR) |
| 3369 | { |
| 3370 | if (fd_info[fd].flags & FILE_BINARY) abort (); |
| 3371 | *buffer++ = 0x0d; |
| 3372 | count--; |
| 3373 | nchars++; |
| 3374 | fd_info[fd].flags &= ~FILE_LAST_CR; |
| 3375 | } |
| 3376 | |
| 3377 | /* presence of a child_process structure means we are operating in |
| 3378 | non-blocking mode - otherwise we just call _read directly. |
| 3379 | Note that the child_process structure might be missing because |
| 3380 | reap_subprocess has been called; in this case the pipe is |
| 3381 | already broken, so calling _read on it is okay. */ |
| 3382 | if (cp) |
| 3383 | { |
| 3384 | int current_status = cp->status; |
| 3385 | |
| 3386 | switch (current_status) |
| 3387 | { |
| 3388 | case STATUS_READ_FAILED: |
| 3389 | case STATUS_READ_ERROR: |
| 3390 | /* report normal EOF if nothing in buffer */ |
| 3391 | if (nchars <= 0) |
| 3392 | fd_info[fd].flags |= FILE_AT_EOF; |
| 3393 | return nchars; |
| 3394 | |
| 3395 | case STATUS_READ_READY: |
| 3396 | case STATUS_READ_IN_PROGRESS: |
| 3397 | DebPrint (("sys_read called when read is in progress\n")); |
| 3398 | errno = EWOULDBLOCK; |
| 3399 | return -1; |
| 3400 | |
| 3401 | case STATUS_READ_SUCCEEDED: |
| 3402 | /* consume read-ahead char */ |
| 3403 | *buffer++ = cp->chr; |
| 3404 | count--; |
| 3405 | nchars++; |
| 3406 | cp->status = STATUS_READ_ACKNOWLEDGED; |
| 3407 | ResetEvent (cp->char_avail); |
| 3408 | |
| 3409 | case STATUS_READ_ACKNOWLEDGED: |
| 3410 | break; |
| 3411 | |
| 3412 | default: |
| 3413 | DebPrint (("sys_read: bad status %d\n", current_status)); |
| 3414 | errno = EBADF; |
| 3415 | return -1; |
| 3416 | } |
| 3417 | |
| 3418 | if (fd_info[fd].flags & FILE_PIPE) |
| 3419 | { |
| 3420 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); |
| 3421 | to_read = min (waiting, (DWORD) count); |
| 3422 | |
| 3423 | if (to_read > 0) |
| 3424 | nchars += _read (fd, buffer, to_read); |
| 3425 | } |
| 3426 | #ifdef HAVE_SOCKETS |
| 3427 | else /* FILE_SOCKET */ |
| 3428 | { |
| 3429 | if (winsock_lib == NULL) abort (); |
| 3430 | |
| 3431 | /* do the equivalent of a non-blocking read */ |
| 3432 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); |
| 3433 | if (waiting == 0 && nchars == 0) |
| 3434 | { |
| 3435 | h_errno = errno = EWOULDBLOCK; |
| 3436 | return -1; |
| 3437 | } |
| 3438 | |
| 3439 | if (waiting) |
| 3440 | { |
| 3441 | /* always use binary mode for sockets */ |
| 3442 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
| 3443 | if (res == SOCKET_ERROR) |
| 3444 | { |
| 3445 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", |
| 3446 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 3447 | set_errno (); |
| 3448 | return -1; |
| 3449 | } |
| 3450 | nchars += res; |
| 3451 | } |
| 3452 | } |
| 3453 | #endif |
| 3454 | } |
| 3455 | else |
| 3456 | { |
| 3457 | int nread = _read (fd, buffer, count); |
| 3458 | if (nread >= 0) |
| 3459 | nchars += nread; |
| 3460 | else if (nchars == 0) |
| 3461 | nchars = nread; |
| 3462 | } |
| 3463 | |
| 3464 | if (nchars <= 0) |
| 3465 | fd_info[fd].flags |= FILE_AT_EOF; |
| 3466 | /* Perform text mode translation if required. */ |
| 3467 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 3468 | { |
| 3469 | nchars = crlf_to_lf (nchars, orig_buffer); |
| 3470 | /* If buffer contains only CR, return that. To be absolutely |
| 3471 | sure we should attempt to read the next char, but in |
| 3472 | practice a CR to be followed by LF would not appear by |
| 3473 | itself in the buffer. */ |
| 3474 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) |
| 3475 | { |
| 3476 | fd_info[fd].flags |= FILE_LAST_CR; |
| 3477 | nchars--; |
| 3478 | } |
| 3479 | } |
| 3480 | } |
| 3481 | else |
| 3482 | nchars = _read (fd, buffer, count); |
| 3483 | |
| 3484 | return nchars; |
| 3485 | } |
| 3486 | |
| 3487 | /* For now, don't bother with a non-blocking mode */ |
| 3488 | int |
| 3489 | sys_write (int fd, const void * buffer, unsigned int count) |
| 3490 | { |
| 3491 | int nchars; |
| 3492 | |
| 3493 | if (fd < 0 || fd >= MAXDESC) |
| 3494 | { |
| 3495 | errno = EBADF; |
| 3496 | return -1; |
| 3497 | } |
| 3498 | |
| 3499 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) |
| 3500 | { |
| 3501 | if ((fd_info[fd].flags & FILE_WRITE) == 0) |
| 3502 | { |
| 3503 | errno = EBADF; |
| 3504 | return -1; |
| 3505 | } |
| 3506 | |
| 3507 | /* Perform text mode translation if required. */ |
| 3508 | if ((fd_info[fd].flags & FILE_BINARY) == 0) |
| 3509 | { |
| 3510 | char * tmpbuf = alloca (count * 2); |
| 3511 | unsigned char * src = (void *)buffer; |
| 3512 | unsigned char * dst = tmpbuf; |
| 3513 | int nbytes = count; |
| 3514 | |
| 3515 | while (1) |
| 3516 | { |
| 3517 | unsigned char *next; |
| 3518 | /* copy next line or remaining bytes */ |
| 3519 | next = _memccpy (dst, src, '\n', nbytes); |
| 3520 | if (next) |
| 3521 | { |
| 3522 | /* copied one line ending with '\n' */ |
| 3523 | int copied = next - dst; |
| 3524 | nbytes -= copied; |
| 3525 | src += copied; |
| 3526 | /* insert '\r' before '\n' */ |
| 3527 | next[-1] = '\r'; |
| 3528 | next[0] = '\n'; |
| 3529 | dst = next + 1; |
| 3530 | count++; |
| 3531 | } |
| 3532 | else |
| 3533 | /* copied remaining partial line -> now finished */ |
| 3534 | break; |
| 3535 | } |
| 3536 | buffer = tmpbuf; |
| 3537 | } |
| 3538 | } |
| 3539 | |
| 3540 | #ifdef HAVE_SOCKETS |
| 3541 | if (fd_info[fd].flags & FILE_SOCKET) |
| 3542 | { |
| 3543 | if (winsock_lib == NULL) abort (); |
| 3544 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
| 3545 | if (nchars == SOCKET_ERROR) |
| 3546 | { |
| 3547 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", |
| 3548 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); |
| 3549 | set_errno (); |
| 3550 | } |
| 3551 | } |
| 3552 | else |
| 3553 | #endif |
| 3554 | nchars = _write (fd, buffer, count); |
| 3555 | |
| 3556 | return nchars; |
| 3557 | } |
| 3558 | |
| 3559 | static void |
| 3560 | check_windows_init_file () |
| 3561 | { |
| 3562 | extern int noninteractive, inhibit_window_system; |
| 3563 | |
| 3564 | /* A common indication that Emacs is not installed properly is when |
| 3565 | it cannot find the Windows installation file. If this file does |
| 3566 | not exist in the expected place, tell the user. */ |
| 3567 | |
| 3568 | if (!noninteractive && !inhibit_window_system) |
| 3569 | { |
| 3570 | extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p; |
| 3571 | Lisp_Object objs[2]; |
| 3572 | Lisp_Object full_load_path; |
| 3573 | Lisp_Object init_file; |
| 3574 | int fd; |
| 3575 | |
| 3576 | objs[0] = Vload_path; |
| 3577 | objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH"))); |
| 3578 | full_load_path = Fappend (2, objs); |
| 3579 | init_file = build_string ("term/w32-win"); |
| 3580 | fd = openp (full_load_path, init_file, Vload_suffixes, NULL, Qnil); |
| 3581 | if (fd < 0) |
| 3582 | { |
| 3583 | Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil); |
| 3584 | char *init_file_name = XSTRING (init_file)->data; |
| 3585 | char *load_path = XSTRING (load_path_print)->data; |
| 3586 | char *buffer = alloca (1024); |
| 3587 | |
| 3588 | sprintf (buffer, |
| 3589 | "The Emacs Windows initialization file \"%s.el\" " |
| 3590 | "could not be found in your Emacs installation. " |
| 3591 | "Emacs checked the following directories for this file:\n" |
| 3592 | "\n%s\n\n" |
| 3593 | "When Emacs cannot find this file, it usually means that it " |
| 3594 | "was not installed properly, or its distribution file was " |
| 3595 | "not unpacked properly.\nSee the README.W32 file in the " |
| 3596 | "top-level Emacs directory for more information.", |
| 3597 | init_file_name, load_path); |
| 3598 | MessageBox (NULL, |
| 3599 | buffer, |
| 3600 | "Emacs Abort Dialog", |
| 3601 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); |
| 3602 | /* Use the low-level Emacs abort. */ |
| 3603 | #undef abort |
| 3604 | abort (); |
| 3605 | } |
| 3606 | else |
| 3607 | { |
| 3608 | _close (fd); |
| 3609 | } |
| 3610 | } |
| 3611 | } |
| 3612 | |
| 3613 | void |
| 3614 | term_ntproc () |
| 3615 | { |
| 3616 | #ifdef HAVE_SOCKETS |
| 3617 | /* shutdown the socket interface if necessary */ |
| 3618 | term_winsock (); |
| 3619 | #endif |
| 3620 | } |
| 3621 | |
| 3622 | void |
| 3623 | init_ntproc () |
| 3624 | { |
| 3625 | #ifdef HAVE_SOCKETS |
| 3626 | /* Initialise the socket interface now if available and requested by |
| 3627 | the user by defining PRELOAD_WINSOCK; otherwise loading will be |
| 3628 | delayed until open-network-stream is called (w32-has-winsock can |
| 3629 | also be used to dynamically load or reload winsock). |
| 3630 | |
| 3631 | Conveniently, init_environment is called before us, so |
| 3632 | PRELOAD_WINSOCK can be set in the registry. */ |
| 3633 | |
| 3634 | /* Always initialize this correctly. */ |
| 3635 | winsock_lib = NULL; |
| 3636 | |
| 3637 | if (getenv ("PRELOAD_WINSOCK") != NULL) |
| 3638 | init_winsock (TRUE); |
| 3639 | #endif |
| 3640 | |
| 3641 | /* Initial preparation for subprocess support: replace our standard |
| 3642 | handles with non-inheritable versions. */ |
| 3643 | { |
| 3644 | HANDLE parent; |
| 3645 | HANDLE stdin_save = INVALID_HANDLE_VALUE; |
| 3646 | HANDLE stdout_save = INVALID_HANDLE_VALUE; |
| 3647 | HANDLE stderr_save = INVALID_HANDLE_VALUE; |
| 3648 | |
| 3649 | parent = GetCurrentProcess (); |
| 3650 | |
| 3651 | /* ignore errors when duplicating and closing; typically the |
| 3652 | handles will be invalid when running as a gui program. */ |
| 3653 | DuplicateHandle (parent, |
| 3654 | GetStdHandle (STD_INPUT_HANDLE), |
| 3655 | parent, |
| 3656 | &stdin_save, |
| 3657 | 0, |
| 3658 | FALSE, |
| 3659 | DUPLICATE_SAME_ACCESS); |
| 3660 | |
| 3661 | DuplicateHandle (parent, |
| 3662 | GetStdHandle (STD_OUTPUT_HANDLE), |
| 3663 | parent, |
| 3664 | &stdout_save, |
| 3665 | 0, |
| 3666 | FALSE, |
| 3667 | DUPLICATE_SAME_ACCESS); |
| 3668 | |
| 3669 | DuplicateHandle (parent, |
| 3670 | GetStdHandle (STD_ERROR_HANDLE), |
| 3671 | parent, |
| 3672 | &stderr_save, |
| 3673 | 0, |
| 3674 | FALSE, |
| 3675 | DUPLICATE_SAME_ACCESS); |
| 3676 | |
| 3677 | fclose (stdin); |
| 3678 | fclose (stdout); |
| 3679 | fclose (stderr); |
| 3680 | |
| 3681 | if (stdin_save != INVALID_HANDLE_VALUE) |
| 3682 | _open_osfhandle ((long) stdin_save, O_TEXT); |
| 3683 | else |
| 3684 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
| 3685 | _fdopen (0, "r"); |
| 3686 | |
| 3687 | if (stdout_save != INVALID_HANDLE_VALUE) |
| 3688 | _open_osfhandle ((long) stdout_save, O_TEXT); |
| 3689 | else |
| 3690 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 3691 | _fdopen (1, "w"); |
| 3692 | |
| 3693 | if (stderr_save != INVALID_HANDLE_VALUE) |
| 3694 | _open_osfhandle ((long) stderr_save, O_TEXT); |
| 3695 | else |
| 3696 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
| 3697 | _fdopen (2, "w"); |
| 3698 | } |
| 3699 | |
| 3700 | /* unfortunately, atexit depends on implementation of malloc */ |
| 3701 | /* atexit (term_ntproc); */ |
| 3702 | signal (SIGABRT, term_ntproc); |
| 3703 | |
| 3704 | /* determine which drives are fixed, for GetCachedVolumeInformation */ |
| 3705 | { |
| 3706 | /* GetDriveType must have trailing backslash. */ |
| 3707 | char drive[] = "A:\\"; |
| 3708 | |
| 3709 | /* Loop over all possible drive letters */ |
| 3710 | while (*drive <= 'Z') |
| 3711 | { |
| 3712 | /* Record if this drive letter refers to a fixed drive. */ |
| 3713 | fixed_drives[DRIVE_INDEX (*drive)] = |
| 3714 | (GetDriveType (drive) == DRIVE_FIXED); |
| 3715 | |
| 3716 | (*drive)++; |
| 3717 | } |
| 3718 | |
| 3719 | /* Reset the volume info cache. */ |
| 3720 | volume_cache = NULL; |
| 3721 | } |
| 3722 | |
| 3723 | /* Check to see if Emacs has been installed correctly. */ |
| 3724 | check_windows_init_file (); |
| 3725 | } |
| 3726 | |
| 3727 | /* end of nt.c */ |