Commit | Line | Data |
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e9e23e23 | 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
35f0d482 | 2 | Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
95ed0025 | 3 | |
3b7ad313 EN |
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. | |
95ed0025 RS |
20 | |
21 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 | |
22 | */ | |
23 | ||
00b3b7b3 | 24 | |
76b3903d | 25 | #include <stddef.h> /* for offsetof */ |
95ed0025 RS |
26 | #include <stdlib.h> |
27 | #include <stdio.h> | |
28 | #include <io.h> | |
480b0c5b | 29 | #include <errno.h> |
95ed0025 RS |
30 | #include <fcntl.h> |
31 | #include <ctype.h> | |
480b0c5b | 32 | #include <signal.h> |
b3308d2e | 33 | #include <sys/file.h> |
480b0c5b | 34 | #include <sys/time.h> |
16bb7578 | 35 | #include <sys/utime.h> |
480b0c5b GV |
36 | |
37 | /* must include CRT headers *before* config.h */ | |
38 | #include "config.h" | |
39 | #undef access | |
40 | #undef chdir | |
41 | #undef chmod | |
42 | #undef creat | |
43 | #undef ctime | |
44 | #undef fopen | |
45 | #undef link | |
46 | #undef mkdir | |
47 | #undef mktemp | |
48 | #undef open | |
49 | #undef rename | |
50 | #undef rmdir | |
51 | #undef unlink | |
52 | ||
53 | #undef close | |
54 | #undef dup | |
55 | #undef dup2 | |
56 | #undef pipe | |
57 | #undef read | |
58 | #undef write | |
95ed0025 | 59 | |
d8fcc1b9 AI |
60 | #undef strerror |
61 | ||
95ed0025 | 62 | #include "lisp.h" |
95ed0025 RS |
63 | |
64 | #include <pwd.h> | |
65 | ||
480b0c5b | 66 | #include <windows.h> |
00b3b7b3 | 67 | |
480b0c5b GV |
68 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
69 | #include <sys/socket.h> | |
70 | #undef socket | |
71 | #undef bind | |
72 | #undef connect | |
73 | #undef htons | |
74 | #undef ntohs | |
75 | #undef inet_addr | |
76 | #undef gethostname | |
77 | #undef gethostbyname | |
78 | #undef getservbyname | |
380961a6 | 79 | #undef shutdown |
480b0c5b | 80 | #endif |
00b3b7b3 | 81 | |
489f9371 | 82 | #include "w32.h" |
480b0c5b | 83 | #include "ndir.h" |
489f9371 | 84 | #include "w32heap.h" |
76b3903d | 85 | |
03887dd3 KH |
86 | #undef min |
87 | #undef max | |
88 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
89 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
90 | ||
76b3903d GV |
91 | extern Lisp_Object Vw32_downcase_file_names; |
92 | extern Lisp_Object Vw32_generate_fake_inodes; | |
93 | extern Lisp_Object Vw32_get_true_file_attributes; | |
94 | ||
95 | static char startup_dir[MAXPATHLEN]; | |
00b3b7b3 | 96 | |
95ed0025 | 97 | /* Get the current working directory. */ |
480b0c5b | 98 | char * |
95ed0025 RS |
99 | getwd (char *dir) |
100 | { | |
76b3903d | 101 | #if 0 |
480b0c5b GV |
102 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
103 | return dir; | |
104 | return NULL; | |
76b3903d GV |
105 | #else |
106 | /* Emacs doesn't actually change directory itself, and we want to | |
107 | force our real wd to be where emacs.exe is to avoid unnecessary | |
108 | conflicts when trying to rename or delete directories. */ | |
109 | strcpy (dir, startup_dir); | |
110 | return dir; | |
111 | #endif | |
95ed0025 RS |
112 | } |
113 | ||
480b0c5b | 114 | #ifndef HAVE_SOCKETS |
95ed0025 RS |
115 | /* Emulate gethostname. */ |
116 | int | |
117 | gethostname (char *buffer, int size) | |
118 | { | |
119 | /* NT only allows small host names, so the buffer is | |
120 | certainly large enough. */ | |
121 | return !GetComputerName (buffer, &size); | |
122 | } | |
480b0c5b | 123 | #endif /* HAVE_SOCKETS */ |
95ed0025 RS |
124 | |
125 | /* Emulate getloadavg. */ | |
126 | int | |
127 | getloadavg (double loadavg[], int nelem) | |
128 | { | |
129 | int i; | |
130 | ||
131 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
132 | for (i = 0; i < nelem; i++) | |
133 | { | |
134 | loadavg[i] = 0.0; | |
135 | } | |
136 | return i; | |
137 | } | |
138 | ||
480b0c5b | 139 | /* Emulate getpwuid, getpwnam and others. */ |
95ed0025 | 140 | |
051fe60d GV |
141 | #define PASSWD_FIELD_SIZE 256 |
142 | ||
143 | static char the_passwd_name[PASSWD_FIELD_SIZE]; | |
144 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; | |
145 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; | |
146 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; | |
147 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; | |
95ed0025 RS |
148 | |
149 | static struct passwd the_passwd = | |
150 | { | |
151 | the_passwd_name, | |
152 | the_passwd_passwd, | |
153 | 0, | |
154 | 0, | |
155 | 0, | |
156 | the_passwd_gecos, | |
157 | the_passwd_dir, | |
158 | the_passwd_shell, | |
159 | }; | |
160 | ||
480b0c5b GV |
161 | int |
162 | getuid () | |
163 | { | |
164 | return the_passwd.pw_uid; | |
165 | } | |
166 | ||
167 | int | |
168 | geteuid () | |
169 | { | |
170 | /* I could imagine arguing for checking to see whether the user is | |
171 | in the Administrators group and returning a UID of 0 for that | |
172 | case, but I don't know how wise that would be in the long run. */ | |
173 | return getuid (); | |
174 | } | |
175 | ||
176 | int | |
177 | getgid () | |
178 | { | |
179 | return the_passwd.pw_gid; | |
180 | } | |
181 | ||
182 | int | |
183 | getegid () | |
184 | { | |
185 | return getgid (); | |
186 | } | |
187 | ||
95ed0025 RS |
188 | struct passwd * |
189 | getpwuid (int uid) | |
190 | { | |
480b0c5b GV |
191 | if (uid == the_passwd.pw_uid) |
192 | return &the_passwd; | |
193 | return NULL; | |
95ed0025 RS |
194 | } |
195 | ||
196 | struct passwd * | |
197 | getpwnam (char *name) | |
198 | { | |
199 | struct passwd *pw; | |
200 | ||
201 | pw = getpwuid (getuid ()); | |
202 | if (!pw) | |
203 | return pw; | |
204 | ||
480b0c5b | 205 | if (stricmp (name, pw->pw_name)) |
95ed0025 RS |
206 | return NULL; |
207 | ||
208 | return pw; | |
209 | } | |
210 | ||
480b0c5b GV |
211 | void |
212 | init_user_info () | |
95ed0025 | 213 | { |
480b0c5b GV |
214 | /* Find the user's real name by opening the process token and |
215 | looking up the name associated with the user-sid in that token. | |
216 | ||
217 | Use the relative portion of the identifier authority value from | |
218 | the user-sid as the user id value (same for group id using the | |
219 | primary group sid from the process token). */ | |
220 | ||
221 | char user_sid[256], name[256], domain[256]; | |
222 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; | |
223 | HANDLE token = NULL; | |
224 | SID_NAME_USE user_type; | |
225 | ||
226 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) | |
227 | && GetTokenInformation (token, TokenUser, | |
228 | (PVOID) user_sid, sizeof (user_sid), &trash) | |
229 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, | |
230 | domain, &dlength, &user_type)) | |
d1c1c3d2 | 231 | { |
480b0c5b GV |
232 | strcpy (the_passwd.pw_name, name); |
233 | /* Determine a reasonable uid value. */ | |
234 | if (stricmp ("administrator", name) == 0) | |
235 | { | |
236 | the_passwd.pw_uid = 0; | |
237 | the_passwd.pw_gid = 0; | |
238 | } | |
239 | else | |
240 | { | |
241 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
242 | ||
243 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
244 | /* I believe the relative portion is the last 4 bytes (of 6) | |
245 | with msb first. */ | |
246 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + | |
247 | (pSIA->Value[3] << 16) + | |
248 | (pSIA->Value[4] << 8) + | |
249 | (pSIA->Value[5] << 0)); | |
250 | /* restrict to conventional uid range for normal users */ | |
251 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; | |
252 | ||
253 | /* Get group id */ | |
254 | if (GetTokenInformation (token, TokenPrimaryGroup, | |
255 | (PVOID) user_sid, sizeof (user_sid), &trash)) | |
256 | { | |
257 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
258 | ||
259 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
260 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + | |
261 | (pSIA->Value[3] << 16) + | |
262 | (pSIA->Value[4] << 8) + | |
263 | (pSIA->Value[5] << 0)); | |
264 | /* I don't know if this is necessary, but for safety... */ | |
265 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; | |
266 | } | |
267 | else | |
268 | the_passwd.pw_gid = the_passwd.pw_uid; | |
269 | } | |
270 | } | |
271 | /* If security calls are not supported (presumably because we | |
272 | are running under Windows 95), fallback to this. */ | |
273 | else if (GetUserName (name, &length)) | |
274 | { | |
275 | strcpy (the_passwd.pw_name, name); | |
276 | if (stricmp ("administrator", name) == 0) | |
277 | the_passwd.pw_uid = 0; | |
278 | else | |
279 | the_passwd.pw_uid = 123; | |
280 | the_passwd.pw_gid = the_passwd.pw_uid; | |
281 | } | |
282 | else | |
283 | { | |
284 | strcpy (the_passwd.pw_name, "unknown"); | |
285 | the_passwd.pw_uid = 123; | |
286 | the_passwd.pw_gid = 123; | |
d1c1c3d2 | 287 | } |
95ed0025 | 288 | |
480b0c5b GV |
289 | /* Ensure HOME and SHELL are defined. */ |
290 | if (getenv ("HOME") == NULL) | |
291 | putenv ("HOME=c:/"); | |
292 | if (getenv ("SHELL") == NULL) | |
76b3903d | 293 | putenv (os_subtype == OS_WIN95 ? "SHELL=command" : "SHELL=cmd"); |
95ed0025 | 294 | |
480b0c5b GV |
295 | /* Set dir and shell from environment variables. */ |
296 | strcpy (the_passwd.pw_dir, getenv ("HOME")); | |
297 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); | |
bd4a449f | 298 | |
480b0c5b GV |
299 | if (token) |
300 | CloseHandle (token); | |
95ed0025 RS |
301 | } |
302 | ||
95ed0025 | 303 | int |
480b0c5b | 304 | random () |
95ed0025 | 305 | { |
480b0c5b GV |
306 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
307 | return ((rand () << 15) | rand ()); | |
95ed0025 RS |
308 | } |
309 | ||
95ed0025 | 310 | void |
480b0c5b | 311 | srandom (int seed) |
95ed0025 | 312 | { |
480b0c5b | 313 | srand (seed); |
95ed0025 RS |
314 | } |
315 | ||
76b3903d | 316 | |
cbe39279 RS |
317 | /* Normalize filename by converting all path separators to |
318 | the specified separator. Also conditionally convert upper | |
319 | case path name components to lower case. */ | |
320 | ||
321 | static void | |
322 | normalize_filename (fp, path_sep) | |
323 | register char *fp; | |
324 | char path_sep; | |
325 | { | |
326 | char sep; | |
327 | char *elem; | |
328 | ||
5162ffce MB |
329 | /* Always lower-case drive letters a-z, even if the filesystem |
330 | preserves case in filenames. | |
331 | This is so filenames can be compared by string comparison | |
332 | functions that are case-sensitive. Even case-preserving filesystems | |
333 | do not distinguish case in drive letters. */ | |
334 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') | |
335 | { | |
336 | *fp += 'a' - 'A'; | |
337 | fp += 2; | |
338 | } | |
339 | ||
fbd6baed | 340 | if (NILP (Vw32_downcase_file_names)) |
cbe39279 RS |
341 | { |
342 | while (*fp) | |
343 | { | |
344 | if (*fp == '/' || *fp == '\\') | |
345 | *fp = path_sep; | |
346 | fp++; | |
347 | } | |
348 | return; | |
349 | } | |
350 | ||
351 | sep = path_sep; /* convert to this path separator */ | |
352 | elem = fp; /* start of current path element */ | |
353 | ||
354 | do { | |
355 | if (*fp >= 'a' && *fp <= 'z') | |
356 | elem = 0; /* don't convert this element */ | |
357 | ||
358 | if (*fp == 0 || *fp == ':') | |
359 | { | |
360 | sep = *fp; /* restore current separator (or 0) */ | |
361 | *fp = '/'; /* after conversion of this element */ | |
362 | } | |
363 | ||
364 | if (*fp == '/' || *fp == '\\') | |
365 | { | |
366 | if (elem && elem != fp) | |
367 | { | |
368 | *fp = 0; /* temporary end of string */ | |
369 | _strlwr (elem); /* while we convert to lower case */ | |
370 | } | |
371 | *fp = sep; /* convert (or restore) path separator */ | |
372 | elem = fp + 1; /* next element starts after separator */ | |
373 | sep = path_sep; | |
374 | } | |
375 | } while (*fp++); | |
376 | } | |
377 | ||
480b0c5b | 378 | /* Destructively turn backslashes into slashes. */ |
95ed0025 | 379 | void |
480b0c5b GV |
380 | dostounix_filename (p) |
381 | register char *p; | |
95ed0025 | 382 | { |
cbe39279 | 383 | normalize_filename (p, '/'); |
95ed0025 RS |
384 | } |
385 | ||
480b0c5b | 386 | /* Destructively turn slashes into backslashes. */ |
95ed0025 | 387 | void |
480b0c5b GV |
388 | unixtodos_filename (p) |
389 | register char *p; | |
95ed0025 | 390 | { |
cbe39279 | 391 | normalize_filename (p, '\\'); |
95ed0025 RS |
392 | } |
393 | ||
480b0c5b GV |
394 | /* Remove all CR's that are followed by a LF. |
395 | (From msdos.c...probably should figure out a way to share it, | |
396 | although this code isn't going to ever change.) */ | |
35f0d482 | 397 | int |
480b0c5b GV |
398 | crlf_to_lf (n, buf) |
399 | register int n; | |
400 | register unsigned char *buf; | |
35f0d482 | 401 | { |
480b0c5b GV |
402 | unsigned char *np = buf; |
403 | unsigned char *startp = buf; | |
404 | unsigned char *endp = buf + n; | |
35f0d482 | 405 | |
480b0c5b GV |
406 | if (n == 0) |
407 | return n; | |
408 | while (buf < endp - 1) | |
95ed0025 | 409 | { |
480b0c5b GV |
410 | if (*buf == 0x0d) |
411 | { | |
412 | if (*(++buf) != 0x0a) | |
413 | *np++ = 0x0d; | |
414 | } | |
415 | else | |
416 | *np++ = *buf++; | |
95ed0025 | 417 | } |
480b0c5b GV |
418 | if (buf < endp) |
419 | *np++ = *buf++; | |
420 | return np - startp; | |
95ed0025 RS |
421 | } |
422 | ||
76b3903d GV |
423 | /* Parse the root part of file name, if present. Return length and |
424 | optionally store pointer to char after root. */ | |
425 | static int | |
426 | parse_root (char * name, char ** pPath) | |
427 | { | |
428 | char * start = name; | |
429 | ||
430 | if (name == NULL) | |
431 | return 0; | |
432 | ||
433 | /* find the root name of the volume if given */ | |
434 | if (isalpha (name[0]) && name[1] == ':') | |
435 | { | |
436 | /* skip past drive specifier */ | |
437 | name += 2; | |
438 | if (IS_DIRECTORY_SEP (name[0])) | |
439 | name++; | |
440 | } | |
441 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
442 | { | |
443 | int slashes = 2; | |
444 | name += 2; | |
445 | do | |
446 | { | |
447 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
448 | break; | |
449 | name++; | |
450 | } | |
451 | while ( *name ); | |
452 | if (IS_DIRECTORY_SEP (name[0])) | |
453 | name++; | |
454 | } | |
455 | ||
456 | if (pPath) | |
457 | *pPath = name; | |
458 | ||
459 | return name - start; | |
460 | } | |
461 | ||
462 | /* Get long base name for name; name is assumed to be absolute. */ | |
463 | static int | |
464 | get_long_basename (char * name, char * buf, int size) | |
465 | { | |
466 | WIN32_FIND_DATA find_data; | |
467 | HANDLE dir_handle; | |
468 | int len = 0; | |
469 | ||
bb1584c8 RS |
470 | /* must be valid filename, no wild cards or other illegal characters */ |
471 | if (strpbrk (name, "*?|<>\"")) | |
472 | return 0; | |
473 | ||
76b3903d GV |
474 | dir_handle = FindFirstFile (name, &find_data); |
475 | if (dir_handle != INVALID_HANDLE_VALUE) | |
476 | { | |
477 | if ((len = strlen (find_data.cFileName)) < size) | |
478 | memcpy (buf, find_data.cFileName, len + 1); | |
479 | else | |
480 | len = 0; | |
481 | FindClose (dir_handle); | |
482 | } | |
483 | return len; | |
484 | } | |
485 | ||
486 | /* Get long name for file, if possible (assumed to be absolute). */ | |
487 | BOOL | |
488 | w32_get_long_filename (char * name, char * buf, int size) | |
489 | { | |
490 | char * o = buf; | |
491 | char * p; | |
492 | char * q; | |
493 | char full[ MAX_PATH ]; | |
494 | int len; | |
495 | ||
496 | len = strlen (name); | |
497 | if (len >= MAX_PATH) | |
498 | return FALSE; | |
499 | ||
500 | /* Use local copy for destructive modification. */ | |
501 | memcpy (full, name, len+1); | |
502 | unixtodos_filename (full); | |
503 | ||
504 | /* Copy root part verbatim. */ | |
505 | len = parse_root (full, &p); | |
506 | memcpy (o, full, len); | |
507 | o += len; | |
4f8ac0b2 | 508 | *o = '\0'; |
76b3903d GV |
509 | size -= len; |
510 | ||
4f8ac0b2 | 511 | while (p != NULL && *p) |
76b3903d GV |
512 | { |
513 | q = p; | |
514 | p = strchr (q, '\\'); | |
515 | if (p) *p = '\0'; | |
516 | len = get_long_basename (full, o, size); | |
517 | if (len > 0) | |
518 | { | |
519 | o += len; | |
520 | size -= len; | |
521 | if (p != NULL) | |
522 | { | |
523 | *p++ = '\\'; | |
524 | if (size < 2) | |
525 | return FALSE; | |
526 | *o++ = '\\'; | |
527 | size--; | |
528 | *o = '\0'; | |
529 | } | |
530 | } | |
531 | else | |
532 | return FALSE; | |
533 | } | |
76b3903d GV |
534 | |
535 | return TRUE; | |
536 | } | |
537 | ||
9d3355d1 GV |
538 | int |
539 | is_unc_volume (const char *filename) | |
540 | { | |
541 | const char *ptr = filename; | |
542 | ||
543 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) | |
544 | return 0; | |
545 | ||
546 | if (strpbrk (ptr + 2, "*?|<>\"\\/")) | |
547 | return 0; | |
548 | ||
549 | return 1; | |
550 | } | |
76b3903d | 551 | |
95ed0025 RS |
552 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
553 | ||
95ed0025 RS |
554 | int |
555 | sigsetmask (int signal_mask) | |
556 | { | |
557 | return 0; | |
558 | } | |
559 | ||
560 | int | |
561 | sigblock (int sig) | |
562 | { | |
563 | return 0; | |
564 | } | |
565 | ||
95ed0025 RS |
566 | int |
567 | setpgrp (int pid, int gid) | |
568 | { | |
569 | return 0; | |
570 | } | |
571 | ||
572 | int | |
573 | alarm (int seconds) | |
574 | { | |
575 | return 0; | |
576 | } | |
577 | ||
c6624584 | 578 | void |
95ed0025 RS |
579 | unrequest_sigio (void) |
580 | { | |
c6624584 | 581 | return; |
95ed0025 RS |
582 | } |
583 | ||
c6624584 | 584 | void |
95ed0025 RS |
585 | request_sigio (void) |
586 | { | |
c6624584 | 587 | return; |
95ed0025 RS |
588 | } |
589 | ||
480b0c5b | 590 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
f332b293 GV |
591 | |
592 | LPBYTE | |
fbd6baed | 593 | w32_get_resource (key, lpdwtype) |
f332b293 GV |
594 | char *key; |
595 | LPDWORD lpdwtype; | |
596 | { | |
597 | LPBYTE lpvalue; | |
598 | HKEY hrootkey = NULL; | |
599 | DWORD cbData; | |
600 | BOOL ok = FALSE; | |
601 | ||
602 | /* Check both the current user and the local machine to see if | |
603 | we have any resources. */ | |
604 | ||
605 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
606 | { | |
607 | lpvalue = NULL; | |
608 | ||
609 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS | |
610 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
611 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
612 | { | |
613 | return (lpvalue); | |
614 | } | |
615 | ||
616 | if (lpvalue) xfree (lpvalue); | |
617 | ||
618 | RegCloseKey (hrootkey); | |
619 | } | |
620 | ||
621 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
622 | { | |
623 | lpvalue = NULL; | |
624 | ||
76b3903d GV |
625 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
626 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
627 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
f332b293 GV |
628 | { |
629 | return (lpvalue); | |
630 | } | |
631 | ||
632 | if (lpvalue) xfree (lpvalue); | |
633 | ||
634 | RegCloseKey (hrootkey); | |
635 | } | |
636 | ||
637 | return (NULL); | |
638 | } | |
639 | ||
75b08edb GV |
640 | char *get_emacs_configuration (void); |
641 | extern Lisp_Object Vsystem_configuration; | |
642 | ||
f332b293 | 643 | void |
aa7b87b0 | 644 | init_environment (char ** argv) |
f332b293 | 645 | { |
b3308d2e KH |
646 | int len; |
647 | static const char * const tempdirs[] = { | |
648 | "$TMPDIR", "$TEMP", "$TMP", "c:/" | |
649 | }; | |
650 | int i; | |
651 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); | |
652 | ||
653 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use | |
654 | temporary files and assume "/tmp" if $TMPDIR is unset, which | |
655 | will break on DOS/Windows. Refuse to work if we cannot find | |
656 | a directory, not even "c:/", usable for that purpose. */ | |
657 | for (i = 0; i < imax ; i++) | |
658 | { | |
659 | const char *tmp = tempdirs[i]; | |
660 | ||
661 | if (*tmp == '$') | |
662 | tmp = getenv (tmp + 1); | |
663 | /* Note that `access' can lie to us if the directory resides on a | |
664 | read-only filesystem, like CD-ROM or a write-protected floppy. | |
665 | The only way to be really sure is to actually create a file and | |
666 | see if it succeeds. But I think that's too much to ask. */ | |
667 | if (tmp && access (tmp, D_OK) == 0) | |
668 | { | |
669 | char * var = alloca (strlen (tmp) + 8); | |
670 | sprintf (var, "TMPDIR=%s", tmp); | |
671 | putenv (var); | |
672 | break; | |
673 | } | |
674 | } | |
675 | if (i >= imax) | |
676 | cmd_error_internal | |
677 | (Fcons (Qerror, | |
678 | Fcons (build_string ("no usable temporary directories found!!"), | |
679 | Qnil)), | |
680 | "While setting TMPDIR: "); | |
681 | ||
f332b293 GV |
682 | /* Check for environment variables and use registry if they don't exist */ |
683 | { | |
480b0c5b GV |
684 | int i; |
685 | LPBYTE lpval; | |
686 | DWORD dwType; | |
f332b293 | 687 | |
480b0c5b GV |
688 | static char * env_vars[] = |
689 | { | |
690 | "HOME", | |
f249a012 | 691 | "PRELOAD_WINSOCK", |
480b0c5b GV |
692 | "emacs_dir", |
693 | "EMACSLOADPATH", | |
694 | "SHELL", | |
76b3903d | 695 | "CMDPROXY", |
480b0c5b GV |
696 | "EMACSDATA", |
697 | "EMACSPATH", | |
698 | "EMACSLOCKDIR", | |
76b3903d GV |
699 | /* We no longer set INFOPATH because Info-default-directory-list |
700 | is then ignored. We use a hook in winnt.el instead. */ | |
701 | /* "INFOPATH", */ | |
480b0c5b GV |
702 | "EMACSDOC", |
703 | "TERM", | |
704 | }; | |
705 | ||
706 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) | |
f332b293 | 707 | { |
76b3903d GV |
708 | if (!getenv (env_vars[i]) |
709 | && (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL) | |
480b0c5b GV |
710 | { |
711 | if (dwType == REG_EXPAND_SZ) | |
712 | { | |
713 | char buf1[500], buf2[500]; | |
714 | ||
715 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, 500); | |
716 | _snprintf (buf2, 499, "%s=%s", env_vars[i], buf1); | |
717 | putenv (strdup (buf2)); | |
718 | } | |
719 | else if (dwType == REG_SZ) | |
720 | { | |
721 | char buf[500]; | |
f332b293 | 722 | |
480b0c5b GV |
723 | _snprintf (buf, 499, "%s=%s", env_vars[i], lpval); |
724 | putenv (strdup (buf)); | |
725 | } | |
f332b293 | 726 | |
480b0c5b GV |
727 | xfree (lpval); |
728 | } | |
729 | } | |
730 | } | |
731 | ||
75b08edb GV |
732 | /* Rebuild system configuration to reflect invoking system. */ |
733 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); | |
734 | ||
76b3903d GV |
735 | /* Another special case: on NT, the PATH variable is actually named |
736 | "Path" although cmd.exe (perhaps NT itself) arranges for | |
737 | environment variable lookup and setting to be case insensitive. | |
738 | However, Emacs assumes a fully case sensitive environment, so we | |
739 | need to change "Path" to "PATH" to match the expectations of | |
740 | various elisp packages. We do this by the sneaky method of | |
741 | modifying the string in the C runtime environ entry. | |
742 | ||
743 | The same applies to COMSPEC. */ | |
744 | { | |
745 | char ** envp; | |
746 | ||
747 | for (envp = environ; *envp; envp++) | |
748 | if (_strnicmp (*envp, "PATH=", 5) == 0) | |
749 | memcpy (*envp, "PATH=", 5); | |
750 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) | |
751 | memcpy (*envp, "COMSPEC=", 8); | |
752 | } | |
753 | ||
754 | /* Remember the initial working directory for getwd, then make the | |
755 | real wd be the location of emacs.exe to avoid conflicts when | |
756 | renaming or deleting directories. (We also don't call chdir when | |
757 | running subprocesses for the same reason.) */ | |
758 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) | |
759 | abort (); | |
760 | ||
761 | { | |
762 | char *p; | |
aa7b87b0 | 763 | static char modname[MAX_PATH]; |
76b3903d GV |
764 | |
765 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) | |
766 | abort (); | |
767 | if ((p = strrchr (modname, '\\')) == NULL) | |
768 | abort (); | |
769 | *p = 0; | |
770 | ||
771 | SetCurrentDirectory (modname); | |
aa7b87b0 AI |
772 | |
773 | /* Ensure argv[0] has the full path to Emacs. */ | |
774 | *p = '\\'; | |
775 | argv[0] = modname; | |
76b3903d GV |
776 | } |
777 | ||
480b0c5b GV |
778 | init_user_info (); |
779 | } | |
780 | ||
781 | /* We don't have scripts to automatically determine the system configuration | |
782 | for Emacs before it's compiled, and we don't want to have to make the | |
783 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime | |
784 | routine. */ | |
785 | ||
786 | static char configuration_buffer[32]; | |
787 | ||
788 | char * | |
789 | get_emacs_configuration (void) | |
790 | { | |
791 | char *arch, *oem, *os; | |
c5247da2 | 792 | int build_num; |
480b0c5b GV |
793 | |
794 | /* Determine the processor type. */ | |
795 | switch (get_processor_type ()) | |
796 | { | |
797 | ||
798 | #ifdef PROCESSOR_INTEL_386 | |
799 | case PROCESSOR_INTEL_386: | |
800 | case PROCESSOR_INTEL_486: | |
801 | case PROCESSOR_INTEL_PENTIUM: | |
802 | arch = "i386"; | |
803 | break; | |
804 | #endif | |
805 | ||
806 | #ifdef PROCESSOR_INTEL_860 | |
807 | case PROCESSOR_INTEL_860: | |
808 | arch = "i860"; | |
809 | break; | |
810 | #endif | |
811 | ||
812 | #ifdef PROCESSOR_MIPS_R2000 | |
813 | case PROCESSOR_MIPS_R2000: | |
814 | case PROCESSOR_MIPS_R3000: | |
815 | case PROCESSOR_MIPS_R4000: | |
816 | arch = "mips"; | |
817 | break; | |
818 | #endif | |
819 | ||
820 | #ifdef PROCESSOR_ALPHA_21064 | |
821 | case PROCESSOR_ALPHA_21064: | |
822 | arch = "alpha"; | |
823 | break; | |
824 | #endif | |
825 | ||
826 | default: | |
827 | arch = "unknown"; | |
828 | break; | |
f332b293 | 829 | } |
480b0c5b GV |
830 | |
831 | /* Let oem be "*" until we figure out how to decode the OEM field. */ | |
832 | oem = "*"; | |
833 | ||
c5247da2 GV |
834 | switch (osinfo_cache.dwPlatformId) { |
835 | case VER_PLATFORM_WIN32_NT: | |
836 | os = "nt"; | |
837 | build_num = osinfo_cache.dwBuildNumber; | |
838 | break; | |
839 | case VER_PLATFORM_WIN32_WINDOWS: | |
840 | if (osinfo_cache.dwMinorVersion == 0) { | |
841 | os = "windows95"; | |
842 | } else { | |
843 | os = "windows98"; | |
844 | } | |
845 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
846 | break; | |
847 | case VER_PLATFORM_WIN32s: | |
848 | /* Not supported, should not happen. */ | |
849 | os = "windows32s"; | |
850 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
851 | break; | |
852 | default: | |
853 | os = "unknown"; | |
854 | build_num = 0; | |
855 | break; | |
856 | } | |
857 | ||
858 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { | |
859 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, | |
860 | get_w32_major_version (), get_w32_minor_version (), build_num); | |
861 | } else { | |
862 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); | |
863 | } | |
480b0c5b | 864 | |
480b0c5b | 865 | return configuration_buffer; |
f332b293 GV |
866 | } |
867 | ||
35f0d482 KH |
868 | #include <sys/timeb.h> |
869 | ||
870 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ | |
871 | void | |
872 | gettimeofday (struct timeval *tv, struct timezone *tz) | |
873 | { | |
874 | struct _timeb tb; | |
875 | _ftime (&tb); | |
876 | ||
877 | tv->tv_sec = tb.time; | |
878 | tv->tv_usec = tb.millitm * 1000L; | |
879 | if (tz) | |
880 | { | |
881 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ | |
882 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ | |
883 | } | |
884 | } | |
35f0d482 | 885 | |
480b0c5b | 886 | /* ------------------------------------------------------------------------- */ |
fbd6baed | 887 | /* IO support and wrapper functions for W32 API. */ |
480b0c5b | 888 | /* ------------------------------------------------------------------------- */ |
95ed0025 | 889 | |
480b0c5b GV |
890 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
891 | on network directories, so we handle that case here. | |
892 | (Ulrich Leodolter, 1/11/95). */ | |
893 | char * | |
894 | sys_ctime (const time_t *t) | |
895 | { | |
896 | char *str = (char *) ctime (t); | |
897 | return (str ? str : "Sun Jan 01 00:00:00 1970"); | |
898 | } | |
899 | ||
900 | /* Emulate sleep...we could have done this with a define, but that | |
901 | would necessitate including windows.h in the files that used it. | |
902 | This is much easier. */ | |
903 | void | |
904 | sys_sleep (int seconds) | |
905 | { | |
906 | Sleep (seconds * 1000); | |
907 | } | |
908 | ||
76b3903d | 909 | /* Internal MSVC functions for low-level descriptor munging */ |
480b0c5b GV |
910 | extern int __cdecl _set_osfhnd (int fd, long h); |
911 | extern int __cdecl _free_osfhnd (int fd); | |
912 | ||
913 | /* parallel array of private info on file handles */ | |
914 | filedesc fd_info [ MAXDESC ]; | |
915 | ||
76b3903d GV |
916 | typedef struct volume_info_data { |
917 | struct volume_info_data * next; | |
918 | ||
919 | /* time when info was obtained */ | |
920 | DWORD timestamp; | |
921 | ||
922 | /* actual volume info */ | |
923 | char * root_dir; | |
480b0c5b GV |
924 | DWORD serialnum; |
925 | DWORD maxcomp; | |
926 | DWORD flags; | |
76b3903d GV |
927 | char * name; |
928 | char * type; | |
929 | } volume_info_data; | |
930 | ||
931 | /* Global referenced by various functions. */ | |
932 | static volume_info_data volume_info; | |
933 | ||
934 | /* Vector to indicate which drives are local and fixed (for which cached | |
935 | data never expires). */ | |
936 | static BOOL fixed_drives[26]; | |
937 | ||
938 | /* Consider cached volume information to be stale if older than 10s, | |
939 | at least for non-local drives. Info for fixed drives is never stale. */ | |
940 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) | |
941 | #define VOLINFO_STILL_VALID( root_dir, info ) \ | |
942 | ( ( isalpha (root_dir[0]) && \ | |
943 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ | |
944 | || GetTickCount () - info->timestamp < 10000 ) | |
945 | ||
946 | /* Cache support functions. */ | |
947 | ||
948 | /* Simple linked list with linear search is sufficient. */ | |
949 | static volume_info_data *volume_cache = NULL; | |
950 | ||
951 | static volume_info_data * | |
952 | lookup_volume_info (char * root_dir) | |
953 | { | |
954 | volume_info_data * info; | |
955 | ||
956 | for (info = volume_cache; info; info = info->next) | |
957 | if (stricmp (info->root_dir, root_dir) == 0) | |
958 | break; | |
959 | return info; | |
960 | } | |
961 | ||
962 | static void | |
963 | add_volume_info (char * root_dir, volume_info_data * info) | |
964 | { | |
965 | info->root_dir = strdup (root_dir); | |
966 | info->next = volume_cache; | |
967 | volume_cache = info; | |
968 | } | |
969 | ||
970 | ||
971 | /* Wrapper for GetVolumeInformation, which uses caching to avoid | |
972 | performance penalty (~2ms on 486 for local drives, 7.5ms for local | |
973 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ | |
974 | volume_info_data * | |
975 | GetCachedVolumeInformation (char * root_dir) | |
976 | { | |
977 | volume_info_data * info; | |
978 | char default_root[ MAX_PATH ]; | |
979 | ||
980 | /* NULL for root_dir means use root from current directory. */ | |
981 | if (root_dir == NULL) | |
982 | { | |
983 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) | |
984 | return NULL; | |
985 | parse_root (default_root, &root_dir); | |
986 | *root_dir = 0; | |
987 | root_dir = default_root; | |
988 | } | |
989 | ||
990 | /* Local fixed drives can be cached permanently. Removable drives | |
991 | cannot be cached permanently, since the volume name and serial | |
992 | number (if nothing else) can change. Remote drives should be | |
993 | treated as if they are removable, since there is no sure way to | |
994 | tell whether they are or not. Also, the UNC association of drive | |
995 | letters mapped to remote volumes can be changed at any time (even | |
996 | by other processes) without notice. | |
997 | ||
998 | As a compromise, so we can benefit from caching info for remote | |
999 | volumes, we use a simple expiry mechanism to invalidate cache | |
1000 | entries that are more than ten seconds old. */ | |
1001 | ||
1002 | #if 0 | |
1003 | /* No point doing this, because WNetGetConnection is even slower than | |
1004 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, | |
1005 | GetDriveType is about the only call of this type which does not | |
1006 | involve network access, and so is extremely quick). */ | |
1007 | ||
1008 | /* Map drive letter to UNC if remote. */ | |
1009 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) | |
1010 | { | |
1011 | char remote_name[ 256 ]; | |
1012 | char drive[3] = { root_dir[0], ':' }; | |
1013 | ||
1014 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) | |
1015 | == NO_ERROR) | |
1016 | /* do something */ ; | |
1017 | } | |
1018 | #endif | |
1019 | ||
1020 | info = lookup_volume_info (root_dir); | |
1021 | ||
1022 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) | |
1023 | { | |
1024 | char name[ 256 ]; | |
1025 | DWORD serialnum; | |
1026 | DWORD maxcomp; | |
1027 | DWORD flags; | |
1028 | char type[ 256 ]; | |
1029 | ||
1030 | /* Info is not cached, or is stale. */ | |
1031 | if (!GetVolumeInformation (root_dir, | |
1032 | name, sizeof (name), | |
1033 | &serialnum, | |
1034 | &maxcomp, | |
1035 | &flags, | |
1036 | type, sizeof (type))) | |
1037 | return NULL; | |
1038 | ||
1039 | /* Cache the volume information for future use, overwriting existing | |
1040 | entry if present. */ | |
1041 | if (info == NULL) | |
1042 | { | |
1043 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); | |
1044 | add_volume_info (root_dir, info); | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | free (info->name); | |
1049 | free (info->type); | |
1050 | } | |
1051 | ||
1052 | info->name = strdup (name); | |
1053 | info->serialnum = serialnum; | |
1054 | info->maxcomp = maxcomp; | |
1055 | info->flags = flags; | |
1056 | info->type = strdup (type); | |
1057 | info->timestamp = GetTickCount (); | |
1058 | } | |
1059 | ||
1060 | return info; | |
1061 | } | |
480b0c5b GV |
1062 | |
1063 | /* Get information on the volume where name is held; set path pointer to | |
1064 | start of pathname in name (past UNC header\volume header if present). */ | |
1065 | int | |
1066 | get_volume_info (const char * name, const char ** pPath) | |
95ed0025 | 1067 | { |
480b0c5b GV |
1068 | char temp[MAX_PATH]; |
1069 | char *rootname = NULL; /* default to current volume */ | |
76b3903d | 1070 | volume_info_data * info; |
480b0c5b GV |
1071 | |
1072 | if (name == NULL) | |
1073 | return FALSE; | |
1074 | ||
1075 | /* find the root name of the volume if given */ | |
1076 | if (isalpha (name[0]) && name[1] == ':') | |
1077 | { | |
1078 | rootname = temp; | |
1079 | temp[0] = *name++; | |
1080 | temp[1] = *name++; | |
1081 | temp[2] = '\\'; | |
1082 | temp[3] = 0; | |
1083 | } | |
1084 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
95ed0025 | 1085 | { |
480b0c5b GV |
1086 | char *str = temp; |
1087 | int slashes = 4; | |
1088 | rootname = temp; | |
1089 | do | |
1090 | { | |
1091 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
1092 | break; | |
1093 | *str++ = *name++; | |
1094 | } | |
1095 | while ( *name ); | |
1096 | ||
480b0c5b GV |
1097 | *str++ = '\\'; |
1098 | *str = 0; | |
95ed0025 | 1099 | } |
480b0c5b GV |
1100 | |
1101 | if (pPath) | |
1102 | *pPath = name; | |
1103 | ||
76b3903d GV |
1104 | info = GetCachedVolumeInformation (rootname); |
1105 | if (info != NULL) | |
95ed0025 | 1106 | { |
76b3903d GV |
1107 | /* Set global referenced by other functions. */ |
1108 | volume_info = *info; | |
480b0c5b | 1109 | return TRUE; |
95ed0025 | 1110 | } |
480b0c5b GV |
1111 | return FALSE; |
1112 | } | |
1113 | ||
1114 | /* Determine if volume is FAT format (ie. only supports short 8.3 | |
1115 | names); also set path pointer to start of pathname in name. */ | |
1116 | int | |
1117 | is_fat_volume (const char * name, const char ** pPath) | |
1118 | { | |
1119 | if (get_volume_info (name, pPath)) | |
1120 | return (volume_info.maxcomp == 12); | |
1121 | return FALSE; | |
1122 | } | |
1123 | ||
1124 | /* Map filename to a legal 8.3 name if necessary. */ | |
1125 | const char * | |
fbd6baed | 1126 | map_w32_filename (const char * name, const char ** pPath) |
480b0c5b GV |
1127 | { |
1128 | static char shortname[MAX_PATH]; | |
1129 | char * str = shortname; | |
1130 | char c; | |
480b0c5b | 1131 | char * path; |
76b3903d | 1132 | const char * save_name = name; |
480b0c5b GV |
1133 | |
1134 | if (is_fat_volume (name, &path)) /* truncate to 8.3 */ | |
95ed0025 | 1135 | { |
480b0c5b GV |
1136 | register int left = 8; /* maximum number of chars in part */ |
1137 | register int extn = 0; /* extension added? */ | |
1138 | register int dots = 2; /* maximum number of dots allowed */ | |
1139 | ||
1140 | while (name < path) | |
1141 | *str++ = *name++; /* skip past UNC header */ | |
1142 | ||
1143 | while ((c = *name++)) | |
1144 | { | |
1145 | switch ( c ) | |
1146 | { | |
1147 | case '\\': | |
1148 | case '/': | |
1149 | *str++ = '\\'; | |
1150 | extn = 0; /* reset extension flags */ | |
1151 | dots = 2; /* max 2 dots */ | |
1152 | left = 8; /* max length 8 for main part */ | |
1153 | break; | |
1154 | case ':': | |
1155 | *str++ = ':'; | |
1156 | extn = 0; /* reset extension flags */ | |
1157 | dots = 2; /* max 2 dots */ | |
1158 | left = 8; /* max length 8 for main part */ | |
1159 | break; | |
1160 | case '.': | |
1161 | if ( dots ) | |
1162 | { | |
1163 | /* Convert path components of the form .xxx to _xxx, | |
1164 | but leave . and .. as they are. This allows .emacs | |
1165 | to be read as _emacs, for example. */ | |
1166 | ||
1167 | if (! *name || | |
1168 | *name == '.' || | |
1169 | IS_DIRECTORY_SEP (*name)) | |
1170 | { | |
1171 | *str++ = '.'; | |
1172 | dots--; | |
1173 | } | |
1174 | else | |
1175 | { | |
1176 | *str++ = '_'; | |
1177 | left--; | |
1178 | dots = 0; | |
1179 | } | |
1180 | } | |
1181 | else if ( !extn ) | |
1182 | { | |
1183 | *str++ = '.'; | |
1184 | extn = 1; /* we've got an extension */ | |
1185 | left = 3; /* 3 chars in extension */ | |
1186 | } | |
1187 | else | |
1188 | { | |
1189 | /* any embedded dots after the first are converted to _ */ | |
1190 | *str++ = '_'; | |
1191 | } | |
1192 | break; | |
1193 | case '~': | |
1194 | case '#': /* don't lose these, they're important */ | |
1195 | if ( ! left ) | |
1196 | str[-1] = c; /* replace last character of part */ | |
1197 | /* FALLTHRU */ | |
1198 | default: | |
1199 | if ( left ) | |
1200 | { | |
1201 | *str++ = tolower (c); /* map to lower case (looks nicer) */ | |
1202 | left--; | |
1203 | dots = 0; /* started a path component */ | |
1204 | } | |
1205 | break; | |
1206 | } | |
1207 | } | |
1208 | *str = '\0'; | |
fc85cb29 RS |
1209 | } |
1210 | else | |
1211 | { | |
1212 | strcpy (shortname, name); | |
1213 | unixtodos_filename (shortname); | |
95ed0025 | 1214 | } |
480b0c5b GV |
1215 | |
1216 | if (pPath) | |
76b3903d | 1217 | *pPath = shortname + (path - save_name); |
480b0c5b | 1218 | |
fc85cb29 | 1219 | return shortname; |
480b0c5b GV |
1220 | } |
1221 | ||
b3308d2e KH |
1222 | static int |
1223 | is_exec (const char * name) | |
1224 | { | |
1225 | char * p = strrchr (name, '.'); | |
1226 | return | |
1227 | (p != NULL | |
1228 | && (stricmp (p, ".exe") == 0 || | |
1229 | stricmp (p, ".com") == 0 || | |
1230 | stricmp (p, ".bat") == 0 || | |
1231 | stricmp (p, ".cmd") == 0)); | |
1232 | } | |
1233 | ||
76b3903d GV |
1234 | /* Emulate the Unix directory procedures opendir, closedir, |
1235 | and readdir. We can't use the procedures supplied in sysdep.c, | |
1236 | so we provide them here. */ | |
1237 | ||
1238 | struct direct dir_static; /* simulated directory contents */ | |
1239 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; | |
1240 | static int dir_is_fat; | |
1241 | static char dir_pathname[MAXPATHLEN+1]; | |
1242 | static WIN32_FIND_DATA dir_find_data; | |
1243 | ||
9d3355d1 GV |
1244 | /* Support shares on a network resource as subdirectories of a read-only |
1245 | root directory. */ | |
1246 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1247 | HANDLE open_unc_volume (char *); | |
1248 | char *read_unc_volume (HANDLE, char *, int); | |
1249 | void close_unc_volume (HANDLE); | |
1250 | ||
76b3903d GV |
1251 | DIR * |
1252 | opendir (char *filename) | |
1253 | { | |
1254 | DIR *dirp; | |
1255 | ||
1256 | /* Opening is done by FindFirstFile. However, a read is inherent to | |
1257 | this operation, so we defer the open until read time. */ | |
1258 | ||
76b3903d GV |
1259 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
1260 | return NULL; | |
9d3355d1 GV |
1261 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1262 | return NULL; | |
1263 | ||
1264 | if (is_unc_volume (filename)) | |
1265 | { | |
1266 | wnet_enum_handle = open_unc_volume (filename); | |
1267 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) | |
1268 | return NULL; | |
1269 | } | |
1270 | ||
1271 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) | |
1272 | return NULL; | |
76b3903d GV |
1273 | |
1274 | dirp->dd_fd = 0; | |
1275 | dirp->dd_loc = 0; | |
1276 | dirp->dd_size = 0; | |
1277 | ||
1278 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); | |
1279 | dir_pathname[MAXPATHLEN] = '\0'; | |
1280 | dir_is_fat = is_fat_volume (filename, NULL); | |
1281 | ||
1282 | return dirp; | |
1283 | } | |
1284 | ||
1285 | void | |
1286 | closedir (DIR *dirp) | |
1287 | { | |
1288 | /* If we have a find-handle open, close it. */ | |
1289 | if (dir_find_handle != INVALID_HANDLE_VALUE) | |
1290 | { | |
1291 | FindClose (dir_find_handle); | |
1292 | dir_find_handle = INVALID_HANDLE_VALUE; | |
1293 | } | |
9d3355d1 GV |
1294 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1295 | { | |
1296 | close_unc_volume (wnet_enum_handle); | |
1297 | wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1298 | } | |
76b3903d GV |
1299 | xfree ((char *) dirp); |
1300 | } | |
1301 | ||
1302 | struct direct * | |
1303 | readdir (DIR *dirp) | |
1304 | { | |
9d3355d1 GV |
1305 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1306 | { | |
1307 | if (!read_unc_volume (wnet_enum_handle, | |
1308 | dir_find_data.cFileName, | |
1309 | MAX_PATH)) | |
1310 | return NULL; | |
1311 | } | |
76b3903d | 1312 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
9d3355d1 | 1313 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
76b3903d GV |
1314 | { |
1315 | char filename[MAXNAMLEN + 3]; | |
1316 | int ln; | |
1317 | ||
1318 | strcpy (filename, dir_pathname); | |
1319 | ln = strlen (filename) - 1; | |
1320 | if (!IS_DIRECTORY_SEP (filename[ln])) | |
1321 | strcat (filename, "\\"); | |
1322 | strcat (filename, "*"); | |
1323 | ||
1324 | dir_find_handle = FindFirstFile (filename, &dir_find_data); | |
1325 | ||
1326 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
1327 | return NULL; | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | if (!FindNextFile (dir_find_handle, &dir_find_data)) | |
1332 | return NULL; | |
1333 | } | |
1334 | ||
1335 | /* Emacs never uses this value, so don't bother making it match | |
1336 | value returned by stat(). */ | |
1337 | dir_static.d_ino = 1; | |
1338 | ||
1339 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + | |
1340 | dir_static.d_namlen - dir_static.d_namlen % 4; | |
1341 | ||
1342 | dir_static.d_namlen = strlen (dir_find_data.cFileName); | |
1343 | strcpy (dir_static.d_name, dir_find_data.cFileName); | |
1344 | if (dir_is_fat) | |
1345 | _strlwr (dir_static.d_name); | |
1346 | else if (!NILP (Vw32_downcase_file_names)) | |
1347 | { | |
1348 | register char *p; | |
1349 | for (p = dir_static.d_name; *p; p++) | |
1350 | if (*p >= 'a' && *p <= 'z') | |
1351 | break; | |
1352 | if (!*p) | |
1353 | _strlwr (dir_static.d_name); | |
1354 | } | |
1355 | ||
1356 | return &dir_static; | |
1357 | } | |
1358 | ||
9d3355d1 GV |
1359 | HANDLE |
1360 | open_unc_volume (char *path) | |
1361 | { | |
1362 | NETRESOURCE nr; | |
1363 | HANDLE henum; | |
1364 | int result; | |
1365 | ||
1366 | nr.dwScope = RESOURCE_GLOBALNET; | |
1367 | nr.dwType = RESOURCETYPE_DISK; | |
1368 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; | |
1369 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; | |
1370 | nr.lpLocalName = NULL; | |
1371 | nr.lpRemoteName = map_w32_filename (path, NULL); | |
1372 | nr.lpComment = NULL; | |
1373 | nr.lpProvider = NULL; | |
1374 | ||
1375 | result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK, | |
1376 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); | |
1377 | ||
1378 | if (result == NO_ERROR) | |
1379 | return henum; | |
1380 | else | |
1381 | return INVALID_HANDLE_VALUE; | |
1382 | } | |
1383 | ||
1384 | char * | |
1385 | read_unc_volume (HANDLE henum, char *readbuf, int size) | |
1386 | { | |
1387 | int count; | |
1388 | int result; | |
1389 | int bufsize = 512; | |
1390 | char *buffer; | |
1391 | char *ptr; | |
1392 | ||
1393 | count = 1; | |
1394 | buffer = alloca (bufsize); | |
1395 | result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize); | |
1396 | if (result != NO_ERROR) | |
1397 | return NULL; | |
1398 | ||
1399 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ | |
1400 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; | |
1401 | ptr += 2; | |
1402 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; | |
1403 | ptr++; | |
1404 | ||
1405 | strncpy (readbuf, ptr, size); | |
1406 | return readbuf; | |
1407 | } | |
1408 | ||
1409 | void | |
1410 | close_unc_volume (HANDLE henum) | |
1411 | { | |
1412 | if (henum != INVALID_HANDLE_VALUE) | |
1413 | WNetCloseEnum (henum); | |
1414 | } | |
1415 | ||
1416 | DWORD | |
1417 | unc_volume_file_attributes (char *path) | |
1418 | { | |
1419 | HANDLE henum; | |
1420 | DWORD attrs; | |
1421 | ||
1422 | henum = open_unc_volume (path); | |
1423 | if (henum == INVALID_HANDLE_VALUE) | |
1424 | return -1; | |
1425 | ||
1426 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; | |
1427 | ||
1428 | close_unc_volume (henum); | |
1429 | ||
1430 | return attrs; | |
1431 | } | |
1432 | ||
480b0c5b GV |
1433 | |
1434 | /* Shadow some MSVC runtime functions to map requests for long filenames | |
1435 | to reasonable short names if necessary. This was originally added to | |
1436 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support | |
1437 | long file names. */ | |
1438 | ||
1439 | int | |
1440 | sys_access (const char * path, int mode) | |
1441 | { | |
b3308d2e KH |
1442 | DWORD attributes; |
1443 | ||
1444 | /* MSVC implementation doesn't recognize D_OK. */ | |
1445 | path = map_w32_filename (path, NULL); | |
9d3355d1 GV |
1446 | if (is_unc_volume (path)) |
1447 | { | |
1448 | attributes = unc_volume_file_attributes (path); | |
1449 | if (attributes == -1) { | |
1450 | errno = EACCES; | |
1451 | return -1; | |
1452 | } | |
1453 | } | |
1454 | else if ((attributes = GetFileAttributes (path)) == -1) | |
b3308d2e KH |
1455 | { |
1456 | /* Should try mapping GetLastError to errno; for now just indicate | |
1457 | that path doesn't exist. */ | |
1458 | errno = EACCES; | |
1459 | return -1; | |
1460 | } | |
1461 | if ((mode & X_OK) != 0 && !is_exec (path)) | |
1462 | { | |
1463 | errno = EACCES; | |
1464 | return -1; | |
1465 | } | |
1466 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) | |
1467 | { | |
1468 | errno = EACCES; | |
1469 | return -1; | |
1470 | } | |
1471 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) | |
1472 | { | |
1473 | errno = EACCES; | |
1474 | return -1; | |
1475 | } | |
1476 | return 0; | |
480b0c5b GV |
1477 | } |
1478 | ||
1479 | int | |
1480 | sys_chdir (const char * path) | |
1481 | { | |
fbd6baed | 1482 | return _chdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1483 | } |
1484 | ||
1485 | int | |
1486 | sys_chmod (const char * path, int mode) | |
1487 | { | |
fbd6baed | 1488 | return _chmod (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1489 | } |
1490 | ||
1491 | int | |
1492 | sys_creat (const char * path, int mode) | |
1493 | { | |
fbd6baed | 1494 | return _creat (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1495 | } |
1496 | ||
1497 | FILE * | |
1498 | sys_fopen(const char * path, const char * mode) | |
1499 | { | |
1500 | int fd; | |
1501 | int oflag; | |
1502 | const char * mode_save = mode; | |
1503 | ||
1504 | /* Force all file handles to be non-inheritable. This is necessary to | |
1505 | ensure child processes don't unwittingly inherit handles that might | |
1506 | prevent future file access. */ | |
1507 | ||
1508 | if (mode[0] == 'r') | |
1509 | oflag = O_RDONLY; | |
1510 | else if (mode[0] == 'w' || mode[0] == 'a') | |
1511 | oflag = O_WRONLY | O_CREAT | O_TRUNC; | |
95ed0025 | 1512 | else |
480b0c5b GV |
1513 | return NULL; |
1514 | ||
1515 | /* Only do simplistic option parsing. */ | |
1516 | while (*++mode) | |
1517 | if (mode[0] == '+') | |
1518 | { | |
1519 | oflag &= ~(O_RDONLY | O_WRONLY); | |
1520 | oflag |= O_RDWR; | |
1521 | } | |
1522 | else if (mode[0] == 'b') | |
1523 | { | |
1524 | oflag &= ~O_TEXT; | |
1525 | oflag |= O_BINARY; | |
1526 | } | |
1527 | else if (mode[0] == 't') | |
1528 | { | |
1529 | oflag &= ~O_BINARY; | |
1530 | oflag |= O_TEXT; | |
1531 | } | |
1532 | else break; | |
1533 | ||
fbd6baed | 1534 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
480b0c5b GV |
1535 | if (fd < 0) |
1536 | return NULL; | |
1537 | ||
76b3903d | 1538 | return _fdopen (fd, mode_save); |
95ed0025 | 1539 | } |
480b0c5b | 1540 | |
76b3903d | 1541 | /* This only works on NTFS volumes, but is useful to have. */ |
480b0c5b | 1542 | int |
76b3903d | 1543 | sys_link (const char * old, const char * new) |
480b0c5b | 1544 | { |
76b3903d GV |
1545 | HANDLE fileh; |
1546 | int result = -1; | |
1547 | char oldname[MAX_PATH], newname[MAX_PATH]; | |
1548 | ||
1549 | if (old == NULL || new == NULL) | |
1550 | { | |
1551 | errno = ENOENT; | |
1552 | return -1; | |
1553 | } | |
1554 | ||
1555 | strcpy (oldname, map_w32_filename (old, NULL)); | |
1556 | strcpy (newname, map_w32_filename (new, NULL)); | |
1557 | ||
1558 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, | |
1559 | FILE_FLAG_BACKUP_SEMANTICS, NULL); | |
1560 | if (fileh != INVALID_HANDLE_VALUE) | |
1561 | { | |
1562 | int wlen; | |
1563 | ||
1564 | /* Confusingly, the "alternate" stream name field does not apply | |
1565 | when restoring a hard link, and instead contains the actual | |
1566 | stream data for the link (ie. the name of the link to create). | |
1567 | The WIN32_STREAM_ID structure before the cStreamName field is | |
1568 | the stream header, which is then immediately followed by the | |
1569 | stream data. */ | |
1570 | ||
1571 | struct { | |
1572 | WIN32_STREAM_ID wid; | |
1573 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ | |
1574 | } data; | |
1575 | ||
1576 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, | |
1577 | data.wid.cStreamName, MAX_PATH); | |
1578 | if (wlen > 0) | |
1579 | { | |
1580 | LPVOID context = NULL; | |
1581 | DWORD wbytes = 0; | |
1582 | ||
1583 | data.wid.dwStreamId = BACKUP_LINK; | |
1584 | data.wid.dwStreamAttributes = 0; | |
1585 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); | |
1586 | data.wid.Size.HighPart = 0; | |
1587 | data.wid.dwStreamNameSize = 0; | |
1588 | ||
1589 | if (BackupWrite (fileh, (LPBYTE)&data, | |
1590 | offsetof (WIN32_STREAM_ID, cStreamName) | |
1591 | + data.wid.Size.LowPart, | |
1592 | &wbytes, FALSE, FALSE, &context) | |
1593 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) | |
1594 | { | |
1595 | /* succeeded */ | |
1596 | result = 0; | |
1597 | } | |
1598 | else | |
1599 | { | |
1600 | /* Should try mapping GetLastError to errno; for now just | |
1601 | indicate a general error (eg. links not supported). */ | |
1602 | errno = EINVAL; // perhaps EMLINK? | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | CloseHandle (fileh); | |
1607 | } | |
1608 | else | |
1609 | errno = ENOENT; | |
1610 | ||
1611 | return result; | |
480b0c5b GV |
1612 | } |
1613 | ||
1614 | int | |
1615 | sys_mkdir (const char * path) | |
1616 | { | |
fbd6baed | 1617 | return _mkdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1618 | } |
1619 | ||
9d1778b1 RS |
1620 | /* Because of long name mapping issues, we need to implement this |
1621 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate | |
1622 | a unique name, instead of setting the input template to an empty | |
1623 | string. | |
1624 | ||
1625 | Standard algorithm seems to be use pid or tid with a letter on the | |
1626 | front (in place of the 6 X's) and cycle through the letters to find a | |
1627 | unique name. We extend that to allow any reasonable character as the | |
1628 | first of the 6 X's. */ | |
480b0c5b GV |
1629 | char * |
1630 | sys_mktemp (char * template) | |
1631 | { | |
9d1778b1 RS |
1632 | char * p; |
1633 | int i; | |
1634 | unsigned uid = GetCurrentThreadId (); | |
1635 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; | |
1636 | ||
1637 | if (template == NULL) | |
1638 | return NULL; | |
1639 | p = template + strlen (template); | |
1640 | i = 5; | |
1641 | /* replace up to the last 5 X's with uid in decimal */ | |
1642 | while (--p >= template && p[0] == 'X' && --i >= 0) | |
1643 | { | |
1644 | p[0] = '0' + uid % 10; | |
1645 | uid /= 10; | |
1646 | } | |
1647 | ||
1648 | if (i < 0 && p[0] == 'X') | |
1649 | { | |
1650 | i = 0; | |
1651 | do | |
1652 | { | |
1653 | int save_errno = errno; | |
1654 | p[0] = first_char[i]; | |
1655 | if (sys_access (template, 0) < 0) | |
1656 | { | |
1657 | errno = save_errno; | |
1658 | return template; | |
1659 | } | |
1660 | } | |
1661 | while (++i < sizeof (first_char)); | |
1662 | } | |
1663 | ||
1664 | /* Template is badly formed or else we can't generate a unique name, | |
1665 | so return empty string */ | |
1666 | template[0] = 0; | |
1667 | return template; | |
480b0c5b GV |
1668 | } |
1669 | ||
1670 | int | |
1671 | sys_open (const char * path, int oflag, int mode) | |
1672 | { | |
1673 | /* Force all file handles to be non-inheritable. */ | |
fbd6baed | 1674 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
480b0c5b GV |
1675 | } |
1676 | ||
1677 | int | |
1678 | sys_rename (const char * oldname, const char * newname) | |
1679 | { | |
eb9ea53f | 1680 | int result; |
b3308d2e | 1681 | char temp[MAX_PATH]; |
480b0c5b | 1682 | |
e9e23e23 | 1683 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
5162ffce MB |
1684 | alias in a number of circumstances (it is not easy to predict when |
1685 | just by looking at oldname and newname, unfortunately). In these | |
1686 | cases, renaming through a temporary name avoids the problem. | |
1687 | ||
e9e23e23 | 1688 | A second problem on Windows 95 is that renaming through a temp name when |
5162ffce MB |
1689 | newname is uppercase fails (the final long name ends up in |
1690 | lowercase, although the short alias might be uppercase) UNLESS the | |
1691 | long temp name is not 8.3. | |
1692 | ||
e9e23e23 | 1693 | So, on Windows 95 we always rename through a temp name, and we make sure |
5162ffce | 1694 | the temp name has a long extension to ensure correct renaming. */ |
480b0c5b | 1695 | |
fbd6baed | 1696 | strcpy (temp, map_w32_filename (oldname, NULL)); |
480b0c5b | 1697 | |
76b3903d | 1698 | if (os_subtype == OS_WIN95) |
480b0c5b | 1699 | { |
b3308d2e | 1700 | char * o; |
480b0c5b | 1701 | char * p; |
b3308d2e KH |
1702 | int i = 0; |
1703 | ||
1704 | oldname = map_w32_filename (oldname, NULL); | |
1705 | if (o = strrchr (oldname, '\\')) | |
1706 | o++; | |
1707 | else | |
1708 | o = (char *) oldname; | |
480b0c5b | 1709 | |
480b0c5b GV |
1710 | if (p = strrchr (temp, '\\')) |
1711 | p++; | |
1712 | else | |
1713 | p = temp; | |
b3308d2e KH |
1714 | |
1715 | do | |
1716 | { | |
1717 | /* Force temp name to require a manufactured 8.3 alias - this | |
1718 | seems to make the second rename work properly. */ | |
f313ee82 | 1719 | sprintf (p, "_.%s.%u", o, i); |
b3308d2e | 1720 | i++; |
58f0cb7e | 1721 | result = rename (oldname, temp); |
b3308d2e KH |
1722 | } |
1723 | /* This loop must surely terminate! */ | |
f313ee82 | 1724 | while (result < 0 && (errno == EEXIST || errno == EACCES)); |
58f0cb7e | 1725 | if (result < 0) |
480b0c5b GV |
1726 | return -1; |
1727 | } | |
1728 | ||
1729 | /* Emulate Unix behaviour - newname is deleted if it already exists | |
5162ffce | 1730 | (at least if it is a file; don't do this for directories). |
76b3903d | 1731 | |
b3308d2e KH |
1732 | Since we mustn't do this if we are just changing the case of the |
1733 | file name (we would end up deleting the file we are trying to | |
1734 | rename!), we let rename detect if the destination file already | |
1735 | exists - that way we avoid the possible pitfalls of trying to | |
1736 | determine ourselves whether two names really refer to the same | |
1737 | file, which is not always possible in the general case. (Consider | |
1738 | all the permutations of shared or subst'd drives, etc.) */ | |
1739 | ||
1740 | newname = map_w32_filename (newname, NULL); | |
eb9ea53f | 1741 | result = rename (temp, newname); |
b3308d2e KH |
1742 | |
1743 | if (result < 0 | |
f313ee82 | 1744 | && (errno == EEXIST || errno == EACCES) |
b3308d2e KH |
1745 | && _chmod (newname, 0666) == 0 |
1746 | && _unlink (newname) == 0) | |
1747 | result = rename (temp, newname); | |
480b0c5b | 1748 | |
eb9ea53f | 1749 | return result; |
480b0c5b GV |
1750 | } |
1751 | ||
1752 | int | |
1753 | sys_rmdir (const char * path) | |
1754 | { | |
fbd6baed | 1755 | return _rmdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1756 | } |
1757 | ||
1758 | int | |
1759 | sys_unlink (const char * path) | |
1760 | { | |
16bb7578 GV |
1761 | path = map_w32_filename (path, NULL); |
1762 | ||
1763 | /* On Unix, unlink works without write permission. */ | |
1764 | _chmod (path, 0666); | |
1765 | return _unlink (path); | |
480b0c5b GV |
1766 | } |
1767 | ||
1768 | static FILETIME utc_base_ft; | |
1769 | static long double utc_base; | |
1770 | static int init = 0; | |
1771 | ||
1772 | static time_t | |
1773 | convert_time (FILETIME ft) | |
1774 | { | |
1775 | long double ret; | |
1776 | ||
1777 | if (!init) | |
1778 | { | |
1779 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1780 | SYSTEMTIME st; | |
1781 | ||
1782 | st.wYear = 1970; | |
1783 | st.wMonth = 1; | |
1784 | st.wDay = 1; | |
1785 | st.wHour = 0; | |
1786 | st.wMinute = 0; | |
1787 | st.wSecond = 0; | |
1788 | st.wMilliseconds = 0; | |
1789 | ||
1790 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1791 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1792 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1793 | init = 1; | |
1794 | } | |
1795 | ||
1796 | if (CompareFileTime (&ft, &utc_base_ft) < 0) | |
1797 | return 0; | |
1798 | ||
1799 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; | |
1800 | ret -= utc_base; | |
1801 | return (time_t) (ret * 1e-7); | |
1802 | } | |
1803 | ||
480b0c5b GV |
1804 | void |
1805 | convert_from_time_t (time_t time, FILETIME * pft) | |
1806 | { | |
1807 | long double tmp; | |
1808 | ||
1809 | if (!init) | |
1810 | { | |
1811 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1812 | SYSTEMTIME st; | |
1813 | ||
1814 | st.wYear = 1970; | |
1815 | st.wMonth = 1; | |
1816 | st.wDay = 1; | |
1817 | st.wHour = 0; | |
1818 | st.wMinute = 0; | |
1819 | st.wSecond = 0; | |
1820 | st.wMilliseconds = 0; | |
1821 | ||
1822 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1823 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1824 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1825 | init = 1; | |
1826 | } | |
1827 | ||
1828 | /* time in 100ns units since 1-Jan-1601 */ | |
1829 | tmp = (long double) time * 1e7 + utc_base; | |
1830 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); | |
16bb7578 | 1831 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
480b0c5b | 1832 | } |
480b0c5b | 1833 | |
76b3903d GV |
1834 | #if 0 |
1835 | /* No reason to keep this; faking inode values either by hashing or even | |
1836 | using the file index from GetInformationByHandle, is not perfect and | |
1837 | so by default Emacs doesn't use the inode values on Windows. | |
1838 | Instead, we now determine file-truename correctly (except for | |
1839 | possible drive aliasing etc). */ | |
1840 | ||
1841 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ | |
480b0c5b | 1842 | static unsigned |
76b3903d | 1843 | hashval (const unsigned char * str) |
480b0c5b GV |
1844 | { |
1845 | unsigned h = 0; | |
480b0c5b GV |
1846 | while (*str) |
1847 | { | |
1848 | h = (h << 4) + *str++; | |
76b3903d | 1849 | h ^= (h >> 28); |
480b0c5b GV |
1850 | } |
1851 | return h; | |
1852 | } | |
1853 | ||
1854 | /* Return the hash value of the canonical pathname, excluding the | |
1855 | drive/UNC header, to get a hopefully unique inode number. */ | |
76b3903d | 1856 | static DWORD |
480b0c5b GV |
1857 | generate_inode_val (const char * name) |
1858 | { | |
1859 | char fullname[ MAX_PATH ]; | |
1860 | char * p; | |
1861 | unsigned hash; | |
1862 | ||
76b3903d GV |
1863 | /* Get the truly canonical filename, if it exists. (Note: this |
1864 | doesn't resolve aliasing due to subst commands, or recognise hard | |
1865 | links. */ | |
1866 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) | |
1867 | abort (); | |
1868 | ||
1869 | parse_root (fullname, &p); | |
fbd6baed | 1870 | /* Normal W32 filesystems are still case insensitive. */ |
480b0c5b | 1871 | _strlwr (p); |
76b3903d | 1872 | return hashval (p); |
480b0c5b GV |
1873 | } |
1874 | ||
76b3903d GV |
1875 | #endif |
1876 | ||
480b0c5b GV |
1877 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
1878 | replace it with our own. This also allows us to calculate consistent | |
1879 | inode values without hacks in the main Emacs code. */ | |
1880 | int | |
1881 | stat (const char * path, struct stat * buf) | |
1882 | { | |
eb9ea53f | 1883 | char *name, *r; |
480b0c5b GV |
1884 | WIN32_FIND_DATA wfd; |
1885 | HANDLE fh; | |
76b3903d | 1886 | DWORD fake_inode; |
480b0c5b GV |
1887 | int permission; |
1888 | int len; | |
1889 | int rootdir = FALSE; | |
1890 | ||
1891 | if (path == NULL || buf == NULL) | |
1892 | { | |
1893 | errno = EFAULT; | |
1894 | return -1; | |
1895 | } | |
1896 | ||
fbd6baed | 1897 | name = (char *) map_w32_filename (path, &path); |
bb1584c8 RS |
1898 | /* must be valid filename, no wild cards or other illegal characters */ |
1899 | if (strpbrk (name, "*?|<>\"")) | |
480b0c5b GV |
1900 | { |
1901 | errno = ENOENT; | |
1902 | return -1; | |
1903 | } | |
1904 | ||
eb9ea53f GV |
1905 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
1906 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; | |
1907 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') | |
1908 | { | |
1909 | r[1] = r[2] = '\0'; | |
1910 | } | |
1911 | ||
480b0c5b GV |
1912 | /* Remove trailing directory separator, unless name is the root |
1913 | directory of a drive or UNC volume in which case ensure there | |
1914 | is a trailing separator. */ | |
1915 | len = strlen (name); | |
1916 | rootdir = (path >= name + len - 1 | |
1917 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); | |
1918 | name = strcpy (alloca (len + 2), name); | |
1919 | ||
9d3355d1 GV |
1920 | if (is_unc_volume (name)) |
1921 | { | |
1922 | DWORD attrs = unc_volume_file_attributes (name); | |
1923 | ||
1924 | if (attrs == -1) | |
1925 | return -1; | |
1926 | ||
1927 | memset (&wfd, 0, sizeof (wfd)); | |
1928 | wfd.dwFileAttributes = attrs; | |
1929 | wfd.ftCreationTime = utc_base_ft; | |
1930 | wfd.ftLastAccessTime = utc_base_ft; | |
1931 | wfd.ftLastWriteTime = utc_base_ft; | |
1932 | strcpy (wfd.cFileName, name); | |
1933 | } | |
1934 | else if (rootdir) | |
480b0c5b GV |
1935 | { |
1936 | if (!IS_DIRECTORY_SEP (name[len-1])) | |
1937 | strcat (name, "\\"); | |
1938 | if (GetDriveType (name) < 2) | |
1939 | { | |
1940 | errno = ENOENT; | |
1941 | return -1; | |
1942 | } | |
1943 | memset (&wfd, 0, sizeof (wfd)); | |
1944 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; | |
1945 | wfd.ftCreationTime = utc_base_ft; | |
1946 | wfd.ftLastAccessTime = utc_base_ft; | |
1947 | wfd.ftLastWriteTime = utc_base_ft; | |
1948 | strcpy (wfd.cFileName, name); | |
1949 | } | |
1950 | else | |
1951 | { | |
1952 | if (IS_DIRECTORY_SEP (name[len-1])) | |
1953 | name[len - 1] = 0; | |
76b3903d GV |
1954 | |
1955 | /* (This is hacky, but helps when doing file completions on | |
1956 | network drives.) Optimize by using information available from | |
1957 | active readdir if possible. */ | |
b19cc00c GV |
1958 | len = strlen (dir_pathname); |
1959 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) | |
1960 | len--; | |
76b3903d | 1961 | if (dir_find_handle != INVALID_HANDLE_VALUE |
b19cc00c | 1962 | && strnicmp (name, dir_pathname, len) == 0 |
76b3903d GV |
1963 | && IS_DIRECTORY_SEP (name[len]) |
1964 | && stricmp (name + len + 1, dir_static.d_name) == 0) | |
480b0c5b | 1965 | { |
76b3903d GV |
1966 | /* This was the last entry returned by readdir. */ |
1967 | wfd = dir_find_data; | |
1968 | } | |
1969 | else | |
1970 | { | |
1971 | fh = FindFirstFile (name, &wfd); | |
1972 | if (fh == INVALID_HANDLE_VALUE) | |
1973 | { | |
1974 | errno = ENOENT; | |
1975 | return -1; | |
1976 | } | |
1977 | FindClose (fh); | |
480b0c5b | 1978 | } |
480b0c5b GV |
1979 | } |
1980 | ||
1981 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1982 | { | |
1983 | buf->st_mode = _S_IFDIR; | |
1984 | buf->st_nlink = 2; /* doesn't really matter */ | |
76b3903d | 1985 | fake_inode = 0; /* this doesn't either I think */ |
480b0c5b | 1986 | } |
710ea1b8 RS |
1987 | else if (!NILP (Vw32_get_true_file_attributes) |
1988 | /* No access rights required to get info. */ | |
1989 | && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL)) | |
1990 | != INVALID_HANDLE_VALUE) | |
480b0c5b | 1991 | { |
480b0c5b GV |
1992 | /* This is more accurate in terms of gettting the correct number |
1993 | of links, but is quite slow (it is noticable when Emacs is | |
1994 | making a list of file name completions). */ | |
1995 | BY_HANDLE_FILE_INFORMATION info; | |
1996 | ||
480b0c5b GV |
1997 | if (GetFileInformationByHandle (fh, &info)) |
1998 | { | |
480b0c5b | 1999 | buf->st_nlink = info.nNumberOfLinks; |
76b3903d GV |
2000 | /* Might as well use file index to fake inode values, but this |
2001 | is not guaranteed to be unique unless we keep a handle open | |
2002 | all the time (even then there are situations where it is | |
2003 | not unique). Reputedly, there are at most 48 bits of info | |
2004 | (on NTFS, presumably less on FAT). */ | |
2005 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
480b0c5b GV |
2006 | } |
2007 | else | |
2008 | { | |
01f31dfb AI |
2009 | buf->st_nlink = 1; |
2010 | fake_inode = 0; | |
2011 | } | |
2012 | ||
2013 | switch (GetFileType (fh)) | |
2014 | { | |
2015 | case FILE_TYPE_DISK: | |
2016 | buf->st_mode = _S_IFREG; | |
2017 | break; | |
2018 | case FILE_TYPE_PIPE: | |
2019 | buf->st_mode = _S_IFIFO; | |
2020 | break; | |
2021 | case FILE_TYPE_CHAR: | |
2022 | case FILE_TYPE_UNKNOWN: | |
2023 | default: | |
2024 | buf->st_mode = _S_IFCHR; | |
480b0c5b | 2025 | } |
01f31dfb | 2026 | CloseHandle (fh); |
76b3903d GV |
2027 | } |
2028 | else | |
2029 | { | |
2030 | /* Don't bother to make this information more accurate. */ | |
480b0c5b GV |
2031 | buf->st_mode = _S_IFREG; |
2032 | buf->st_nlink = 1; | |
76b3903d GV |
2033 | fake_inode = 0; |
2034 | } | |
2035 | ||
2036 | #if 0 | |
2037 | /* Not sure if there is any point in this. */ | |
2038 | if (!NILP (Vw32_generate_fake_inodes)) | |
2039 | fake_inode = generate_inode_val (name); | |
2040 | else if (fake_inode == 0) | |
2041 | { | |
2042 | /* For want of something better, try to make everything unique. */ | |
2043 | static DWORD gen_num = 0; | |
2044 | fake_inode = ++gen_num; | |
480b0c5b | 2045 | } |
76b3903d GV |
2046 | #endif |
2047 | ||
2048 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2049 | if (sizeof (buf->st_ino) == 2) | |
2050 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2051 | else | |
2052 | buf->st_ino = fake_inode; | |
480b0c5b GV |
2053 | |
2054 | /* consider files to belong to current user */ | |
2055 | buf->st_uid = the_passwd.pw_uid; | |
2056 | buf->st_gid = the_passwd.pw_gid; | |
2057 | ||
fbd6baed | 2058 | /* volume_info is set indirectly by map_w32_filename */ |
480b0c5b GV |
2059 | buf->st_dev = volume_info.serialnum; |
2060 | buf->st_rdev = volume_info.serialnum; | |
2061 | ||
480b0c5b GV |
2062 | |
2063 | buf->st_size = wfd.nFileSizeLow; | |
2064 | ||
2065 | /* Convert timestamps to Unix format. */ | |
2066 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); | |
2067 | buf->st_atime = convert_time (wfd.ftLastAccessTime); | |
2068 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2069 | buf->st_ctime = convert_time (wfd.ftCreationTime); | |
2070 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2071 | ||
2072 | /* determine rwx permissions */ | |
2073 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2074 | permission = _S_IREAD; | |
2075 | else | |
2076 | permission = _S_IREAD | _S_IWRITE; | |
2077 | ||
2078 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2079 | permission |= _S_IEXEC; | |
b3308d2e KH |
2080 | else if (is_exec (name)) |
2081 | permission |= _S_IEXEC; | |
480b0c5b GV |
2082 | |
2083 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2084 | ||
2085 | return 0; | |
2086 | } | |
2087 | ||
16bb7578 GV |
2088 | /* Provide fstat and utime as well as stat for consistent handling of |
2089 | file timestamps. */ | |
2090 | int | |
2091 | fstat (int desc, struct stat * buf) | |
2092 | { | |
2093 | HANDLE fh = (HANDLE) _get_osfhandle (desc); | |
2094 | BY_HANDLE_FILE_INFORMATION info; | |
2095 | DWORD fake_inode; | |
2096 | int permission; | |
2097 | ||
2098 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) | |
2099 | { | |
2100 | case FILE_TYPE_DISK: | |
2101 | buf->st_mode = _S_IFREG; | |
2102 | if (!GetFileInformationByHandle (fh, &info)) | |
2103 | { | |
2104 | errno = EACCES; | |
2105 | return -1; | |
2106 | } | |
2107 | break; | |
2108 | case FILE_TYPE_PIPE: | |
2109 | buf->st_mode = _S_IFIFO; | |
2110 | goto non_disk; | |
2111 | case FILE_TYPE_CHAR: | |
2112 | case FILE_TYPE_UNKNOWN: | |
2113 | default: | |
2114 | buf->st_mode = _S_IFCHR; | |
2115 | non_disk: | |
2116 | memset (&info, 0, sizeof (info)); | |
2117 | info.dwFileAttributes = 0; | |
2118 | info.ftCreationTime = utc_base_ft; | |
2119 | info.ftLastAccessTime = utc_base_ft; | |
2120 | info.ftLastWriteTime = utc_base_ft; | |
2121 | } | |
2122 | ||
2123 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2124 | { | |
2125 | buf->st_mode = _S_IFDIR; | |
2126 | buf->st_nlink = 2; /* doesn't really matter */ | |
2127 | fake_inode = 0; /* this doesn't either I think */ | |
2128 | } | |
2129 | else | |
2130 | { | |
2131 | buf->st_nlink = info.nNumberOfLinks; | |
2132 | /* Might as well use file index to fake inode values, but this | |
2133 | is not guaranteed to be unique unless we keep a handle open | |
2134 | all the time (even then there are situations where it is | |
2135 | not unique). Reputedly, there are at most 48 bits of info | |
2136 | (on NTFS, presumably less on FAT). */ | |
2137 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
2138 | } | |
2139 | ||
2140 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2141 | if (sizeof (buf->st_ino) == 2) | |
2142 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2143 | else | |
2144 | buf->st_ino = fake_inode; | |
2145 | ||
2146 | /* consider files to belong to current user */ | |
2147 | buf->st_uid = 0; | |
2148 | buf->st_gid = 0; | |
2149 | ||
2150 | buf->st_dev = info.dwVolumeSerialNumber; | |
2151 | buf->st_rdev = info.dwVolumeSerialNumber; | |
2152 | ||
2153 | buf->st_size = info.nFileSizeLow; | |
2154 | ||
2155 | /* Convert timestamps to Unix format. */ | |
2156 | buf->st_mtime = convert_time (info.ftLastWriteTime); | |
2157 | buf->st_atime = convert_time (info.ftLastAccessTime); | |
2158 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2159 | buf->st_ctime = convert_time (info.ftCreationTime); | |
2160 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2161 | ||
2162 | /* determine rwx permissions */ | |
2163 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2164 | permission = _S_IREAD; | |
2165 | else | |
2166 | permission = _S_IREAD | _S_IWRITE; | |
2167 | ||
2168 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2169 | permission |= _S_IEXEC; | |
2170 | else | |
2171 | { | |
2172 | #if 0 /* no way of knowing the filename */ | |
2173 | char * p = strrchr (name, '.'); | |
2174 | if (p != NULL && | |
2175 | (stricmp (p, ".exe") == 0 || | |
2176 | stricmp (p, ".com") == 0 || | |
2177 | stricmp (p, ".bat") == 0 || | |
2178 | stricmp (p, ".cmd") == 0)) | |
2179 | permission |= _S_IEXEC; | |
2180 | #endif | |
2181 | } | |
2182 | ||
2183 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2184 | ||
2185 | return 0; | |
2186 | } | |
2187 | ||
2188 | int | |
2189 | utime (const char *name, struct utimbuf *times) | |
2190 | { | |
2191 | struct utimbuf deftime; | |
2192 | HANDLE fh; | |
2193 | FILETIME mtime; | |
2194 | FILETIME atime; | |
2195 | ||
2196 | if (times == NULL) | |
2197 | { | |
2198 | deftime.modtime = deftime.actime = time (NULL); | |
2199 | times = &deftime; | |
2200 | } | |
2201 | ||
2202 | /* Need write access to set times. */ | |
2203 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, | |
2204 | 0, OPEN_EXISTING, 0, NULL); | |
2205 | if (fh) | |
2206 | { | |
2207 | convert_from_time_t (times->actime, &atime); | |
2208 | convert_from_time_t (times->modtime, &mtime); | |
2209 | if (!SetFileTime (fh, NULL, &atime, &mtime)) | |
2210 | { | |
2211 | CloseHandle (fh); | |
2212 | errno = EACCES; | |
2213 | return -1; | |
2214 | } | |
2215 | CloseHandle (fh); | |
2216 | } | |
2217 | else | |
2218 | { | |
2219 | errno = EINVAL; | |
2220 | return -1; | |
2221 | } | |
2222 | return 0; | |
2223 | } | |
2224 | ||
480b0c5b GV |
2225 | #ifdef HAVE_SOCKETS |
2226 | ||
2227 | /* Wrappers for winsock functions to map between our file descriptors | |
2228 | and winsock's handles; also set h_errno for convenience. | |
2229 | ||
2230 | To allow Emacs to run on systems which don't have winsock support | |
2231 | installed, we dynamically link to winsock on startup if present, and | |
2232 | otherwise provide the minimum necessary functionality | |
2233 | (eg. gethostname). */ | |
2234 | ||
2235 | /* function pointers for relevant socket functions */ | |
2236 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); | |
2237 | void (PASCAL *pfn_WSASetLastError) (int iError); | |
2238 | int (PASCAL *pfn_WSAGetLastError) (void); | |
2239 | int (PASCAL *pfn_socket) (int af, int type, int protocol); | |
2240 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2241 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2242 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); | |
2243 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); | |
2244 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); | |
2245 | int (PASCAL *pfn_closesocket) (SOCKET s); | |
2246 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); | |
2247 | int (PASCAL *pfn_WSACleanup) (void); | |
2248 | ||
2249 | u_short (PASCAL *pfn_htons) (u_short hostshort); | |
2250 | u_short (PASCAL *pfn_ntohs) (u_short netshort); | |
2251 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); | |
2252 | int (PASCAL *pfn_gethostname) (char * name, int namelen); | |
2253 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); | |
2254 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); | |
f1614061 RS |
2255 | |
2256 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ | |
2257 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); | |
2258 | #ifndef HANDLE_FLAG_INHERIT | |
2259 | #define HANDLE_FLAG_INHERIT 1 | |
2260 | #endif | |
480b0c5b | 2261 | |
f249a012 RS |
2262 | HANDLE winsock_lib; |
2263 | static int winsock_inuse; | |
480b0c5b | 2264 | |
f249a012 | 2265 | BOOL |
480b0c5b GV |
2266 | term_winsock (void) |
2267 | { | |
f249a012 | 2268 | if (winsock_lib != NULL && winsock_inuse == 0) |
480b0c5b | 2269 | { |
f249a012 RS |
2270 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
2271 | after WSAStartup returns successfully, but it seems reasonable | |
2272 | to allow unloading winsock anyway in that case. */ | |
2273 | if (pfn_WSACleanup () == 0 || | |
2274 | pfn_WSAGetLastError () == WSAENETDOWN) | |
2275 | { | |
2276 | if (FreeLibrary (winsock_lib)) | |
2277 | winsock_lib = NULL; | |
2278 | return TRUE; | |
2279 | } | |
480b0c5b | 2280 | } |
f249a012 | 2281 | return FALSE; |
480b0c5b GV |
2282 | } |
2283 | ||
f249a012 RS |
2284 | BOOL |
2285 | init_winsock (int load_now) | |
480b0c5b GV |
2286 | { |
2287 | WSADATA winsockData; | |
2288 | ||
f249a012 RS |
2289 | if (winsock_lib != NULL) |
2290 | return TRUE; | |
f1614061 RS |
2291 | |
2292 | pfn_SetHandleInformation = NULL; | |
2293 | pfn_SetHandleInformation | |
2294 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
2295 | "SetHandleInformation"); | |
2296 | ||
480b0c5b GV |
2297 | winsock_lib = LoadLibrary ("wsock32.dll"); |
2298 | ||
2299 | if (winsock_lib != NULL) | |
2300 | { | |
2301 | /* dynamically link to socket functions */ | |
2302 | ||
2303 | #define LOAD_PROC(fn) \ | |
2304 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ | |
2305 | goto fail; | |
2306 | ||
2307 | LOAD_PROC( WSAStartup ); | |
2308 | LOAD_PROC( WSASetLastError ); | |
2309 | LOAD_PROC( WSAGetLastError ); | |
2310 | LOAD_PROC( socket ); | |
2311 | LOAD_PROC( bind ); | |
2312 | LOAD_PROC( connect ); | |
2313 | LOAD_PROC( ioctlsocket ); | |
2314 | LOAD_PROC( recv ); | |
2315 | LOAD_PROC( send ); | |
2316 | LOAD_PROC( closesocket ); | |
2317 | LOAD_PROC( shutdown ); | |
2318 | LOAD_PROC( htons ); | |
2319 | LOAD_PROC( ntohs ); | |
2320 | LOAD_PROC( inet_addr ); | |
2321 | LOAD_PROC( gethostname ); | |
2322 | LOAD_PROC( gethostbyname ); | |
2323 | LOAD_PROC( getservbyname ); | |
2324 | LOAD_PROC( WSACleanup ); | |
2325 | ||
f249a012 RS |
2326 | #undef LOAD_PROC |
2327 | ||
480b0c5b GV |
2328 | /* specify version 1.1 of winsock */ |
2329 | if (pfn_WSAStartup (0x101, &winsockData) == 0) | |
2330 | { | |
f249a012 RS |
2331 | if (winsockData.wVersion != 0x101) |
2332 | goto fail; | |
2333 | ||
2334 | if (!load_now) | |
2335 | { | |
2336 | /* Report that winsock exists and is usable, but leave | |
2337 | socket functions disabled. I am assuming that calling | |
2338 | WSAStartup does not require any network interaction, | |
2339 | and in particular does not cause or require a dial-up | |
2340 | connection to be established. */ | |
2341 | ||
2342 | pfn_WSACleanup (); | |
2343 | FreeLibrary (winsock_lib); | |
2344 | winsock_lib = NULL; | |
2345 | } | |
2346 | winsock_inuse = 0; | |
2347 | return TRUE; | |
480b0c5b GV |
2348 | } |
2349 | ||
2350 | fail: | |
2351 | FreeLibrary (winsock_lib); | |
f249a012 | 2352 | winsock_lib = NULL; |
480b0c5b | 2353 | } |
f249a012 RS |
2354 | |
2355 | return FALSE; | |
480b0c5b GV |
2356 | } |
2357 | ||
2358 | ||
2359 | int h_errno = 0; | |
2360 | ||
2361 | /* function to set h_errno for compatability; map winsock error codes to | |
2362 | normal system codes where they overlap (non-overlapping definitions | |
2363 | are already in <sys/socket.h> */ | |
2364 | static void set_errno () | |
2365 | { | |
f249a012 | 2366 | if (winsock_lib == NULL) |
480b0c5b GV |
2367 | h_errno = EINVAL; |
2368 | else | |
2369 | h_errno = pfn_WSAGetLastError (); | |
2370 | ||
2371 | switch (h_errno) | |
2372 | { | |
2373 | case WSAEACCES: h_errno = EACCES; break; | |
2374 | case WSAEBADF: h_errno = EBADF; break; | |
2375 | case WSAEFAULT: h_errno = EFAULT; break; | |
2376 | case WSAEINTR: h_errno = EINTR; break; | |
2377 | case WSAEINVAL: h_errno = EINVAL; break; | |
2378 | case WSAEMFILE: h_errno = EMFILE; break; | |
2379 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; | |
2380 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; | |
2381 | } | |
2382 | errno = h_errno; | |
2383 | } | |
2384 | ||
2385 | static void check_errno () | |
2386 | { | |
f249a012 | 2387 | if (h_errno == 0 && winsock_lib != NULL) |
480b0c5b GV |
2388 | pfn_WSASetLastError (0); |
2389 | } | |
2390 | ||
d8fcc1b9 AI |
2391 | /* Extend strerror to handle the winsock-specific error codes. */ |
2392 | struct { | |
2393 | int errnum; | |
2394 | char * msg; | |
2395 | } _wsa_errlist[] = { | |
2396 | WSAEINTR , "Interrupted function call", | |
2397 | WSAEBADF , "Bad file descriptor", | |
2398 | WSAEACCES , "Permission denied", | |
2399 | WSAEFAULT , "Bad address", | |
2400 | WSAEINVAL , "Invalid argument", | |
2401 | WSAEMFILE , "Too many open files", | |
2402 | ||
2403 | WSAEWOULDBLOCK , "Resource temporarily unavailable", | |
2404 | WSAEINPROGRESS , "Operation now in progress", | |
2405 | WSAEALREADY , "Operation already in progress", | |
2406 | WSAENOTSOCK , "Socket operation on non-socket", | |
2407 | WSAEDESTADDRREQ , "Destination address required", | |
2408 | WSAEMSGSIZE , "Message too long", | |
2409 | WSAEPROTOTYPE , "Protocol wrong type for socket", | |
2410 | WSAENOPROTOOPT , "Bad protocol option", | |
2411 | WSAEPROTONOSUPPORT , "Protocol not supported", | |
2412 | WSAESOCKTNOSUPPORT , "Socket type not supported", | |
2413 | WSAEOPNOTSUPP , "Operation not supported", | |
2414 | WSAEPFNOSUPPORT , "Protocol family not supported", | |
2415 | WSAEAFNOSUPPORT , "Address family not supported by protocol family", | |
2416 | WSAEADDRINUSE , "Address already in use", | |
2417 | WSAEADDRNOTAVAIL , "Cannot assign requested address", | |
2418 | WSAENETDOWN , "Network is down", | |
2419 | WSAENETUNREACH , "Network is unreachable", | |
2420 | WSAENETRESET , "Network dropped connection on reset", | |
2421 | WSAECONNABORTED , "Software caused connection abort", | |
2422 | WSAECONNRESET , "Connection reset by peer", | |
2423 | WSAENOBUFS , "No buffer space available", | |
2424 | WSAEISCONN , "Socket is already connected", | |
2425 | WSAENOTCONN , "Socket is not connected", | |
2426 | WSAESHUTDOWN , "Cannot send after socket shutdown", | |
2427 | WSAETOOMANYREFS , "Too many references", /* not sure */ | |
2428 | WSAETIMEDOUT , "Connection timed out", | |
2429 | WSAECONNREFUSED , "Connection refused", | |
2430 | WSAELOOP , "Network loop", /* not sure */ | |
2431 | WSAENAMETOOLONG , "Name is too long", | |
2432 | WSAEHOSTDOWN , "Host is down", | |
2433 | WSAEHOSTUNREACH , "No route to host", | |
2434 | WSAENOTEMPTY , "Buffer not empty", /* not sure */ | |
2435 | WSAEPROCLIM , "Too many processes", | |
2436 | WSAEUSERS , "Too many users", /* not sure */ | |
2437 | WSAEDQUOT , "Double quote in host name", /* really not sure */ | |
2438 | WSAESTALE , "Data is stale", /* not sure */ | |
2439 | WSAEREMOTE , "Remote error", /* not sure */ | |
2440 | ||
2441 | WSASYSNOTREADY , "Network subsystem is unavailable", | |
2442 | WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range", | |
2443 | WSANOTINITIALISED , "Winsock not initialized successfully", | |
2444 | WSAEDISCON , "Graceful shutdown in progress", | |
2445 | #ifdef WSAENOMORE | |
2446 | WSAENOMORE , "No more operations allowed", /* not sure */ | |
2447 | WSAECANCELLED , "Operation cancelled", /* not sure */ | |
2448 | WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider", | |
2449 | WSAEINVALIDPROVIDER , "Invalid service provider version number", | |
2450 | WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider", | |
2451 | WSASYSCALLFAILURE , "System call failured", | |
2452 | WSASERVICE_NOT_FOUND , "Service not found", /* not sure */ | |
2453 | WSATYPE_NOT_FOUND , "Class type not found", | |
2454 | WSA_E_NO_MORE , "No more resources available", /* really not sure */ | |
2455 | WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */ | |
2456 | WSAEREFUSED , "Operation refused", /* not sure */ | |
2457 | #endif | |
2458 | ||
2459 | WSAHOST_NOT_FOUND , "Host not found", | |
2460 | WSATRY_AGAIN , "Authoritative host not found during name lookup", | |
2461 | WSANO_RECOVERY , "Non-recoverable error during name lookup", | |
2462 | WSANO_DATA , "Valid name, no data record of requested type", | |
2463 | ||
2464 | -1, NULL | |
2465 | }; | |
2466 | ||
2467 | char * | |
2468 | sys_strerror(int error_no) | |
2469 | { | |
2470 | int i; | |
2471 | static char unknown_msg[40]; | |
2472 | ||
2473 | if (error_no >= 0 && error_no < _sys_nerr) | |
2474 | return _sys_errlist[error_no]; | |
2475 | ||
2476 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) | |
2477 | if (_wsa_errlist[i].errnum == error_no) | |
2478 | return _wsa_errlist[i].msg; | |
2479 | ||
2480 | sprintf(unknown_msg, "Unidentified error: %d", error_no); | |
2481 | return unknown_msg; | |
2482 | } | |
2483 | ||
480b0c5b GV |
2484 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
2485 | but I believe the method of keeping the socket handle separate (and | |
2486 | insuring it is not inheritable) is the correct one. */ | |
2487 | ||
2488 | //#define SOCK_REPLACE_HANDLE | |
2489 | ||
2490 | #ifdef SOCK_REPLACE_HANDLE | |
2491 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) | |
2492 | #else | |
2493 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) | |
2494 | #endif | |
2495 | ||
2496 | int | |
2497 | sys_socket(int af, int type, int protocol) | |
2498 | { | |
2499 | int fd; | |
2500 | long s; | |
2501 | child_process * cp; | |
2502 | ||
f249a012 | 2503 | if (winsock_lib == NULL) |
480b0c5b GV |
2504 | { |
2505 | h_errno = ENETDOWN; | |
2506 | return INVALID_SOCKET; | |
2507 | } | |
2508 | ||
2509 | check_errno (); | |
2510 | ||
2511 | /* call the real socket function */ | |
2512 | s = (long) pfn_socket (af, type, protocol); | |
2513 | ||
2514 | if (s != INVALID_SOCKET) | |
2515 | { | |
2516 | /* Although under NT 3.5 _open_osfhandle will accept a socket | |
2517 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, | |
2518 | that does not work under NT 3.1. However, we can get the same | |
2519 | effect by using a backdoor function to replace an existing | |
2520 | descriptor handle with the one we want. */ | |
2521 | ||
2522 | /* allocate a file descriptor (with appropriate flags) */ | |
2523 | fd = _open ("NUL:", _O_RDWR); | |
2524 | if (fd >= 0) | |
2525 | { | |
2526 | #ifdef SOCK_REPLACE_HANDLE | |
2527 | /* now replace handle to NUL with our socket handle */ | |
2528 | CloseHandle ((HANDLE) _get_osfhandle (fd)); | |
2529 | _free_osfhnd (fd); | |
2530 | _set_osfhnd (fd, s); | |
2531 | /* setmode (fd, _O_BINARY); */ | |
2532 | #else | |
2533 | /* Make a non-inheritable copy of the socket handle. */ | |
2534 | { | |
2535 | HANDLE parent; | |
2536 | HANDLE new_s = INVALID_HANDLE_VALUE; | |
2537 | ||
2538 | parent = GetCurrentProcess (); | |
2539 | ||
f1614061 RS |
2540 | /* Apparently there is a bug in NT 3.51 with some service |
2541 | packs, which prevents using DuplicateHandle to make a | |
2542 | socket handle non-inheritable (causes WSACleanup to | |
2543 | hang). The work-around is to use SetHandleInformation | |
2544 | instead if it is available and implemented. */ | |
2545 | if (!pfn_SetHandleInformation | |
2546 | || !pfn_SetHandleInformation ((HANDLE) s, | |
2547 | HANDLE_FLAG_INHERIT, | |
caf1a172 | 2548 | 0)) |
f1614061 RS |
2549 | { |
2550 | DuplicateHandle (parent, | |
2551 | (HANDLE) s, | |
2552 | parent, | |
2553 | &new_s, | |
2554 | 0, | |
2555 | FALSE, | |
2556 | DUPLICATE_SAME_ACCESS); | |
2557 | pfn_closesocket (s); | |
2558 | s = (SOCKET) new_s; | |
2559 | } | |
2560 | fd_info[fd].hnd = (HANDLE) s; | |
480b0c5b GV |
2561 | } |
2562 | #endif | |
2563 | ||
2564 | /* set our own internal flags */ | |
2565 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; | |
2566 | ||
2567 | cp = new_child (); | |
2568 | if (cp) | |
2569 | { | |
2570 | cp->fd = fd; | |
2571 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
2572 | ||
2573 | /* attach child_process to fd_info */ | |
2574 | if (fd_info[ fd ].cp != NULL) | |
2575 | { | |
2576 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); | |
2577 | abort (); | |
2578 | } | |
2579 | ||
2580 | fd_info[ fd ].cp = cp; | |
2581 | ||
2582 | /* success! */ | |
f249a012 | 2583 | winsock_inuse++; /* count open sockets */ |
480b0c5b GV |
2584 | return fd; |
2585 | } | |
2586 | ||
2587 | /* clean up */ | |
2588 | _close (fd); | |
2589 | } | |
2590 | pfn_closesocket (s); | |
2591 | h_errno = EMFILE; | |
2592 | } | |
2593 | set_errno (); | |
2594 | ||
2595 | return -1; | |
2596 | } | |
2597 | ||
2598 | ||
2599 | int | |
2600 | sys_bind (int s, const struct sockaddr * addr, int namelen) | |
2601 | { | |
f249a012 | 2602 | if (winsock_lib == NULL) |
480b0c5b GV |
2603 | { |
2604 | h_errno = ENOTSOCK; | |
2605 | return SOCKET_ERROR; | |
2606 | } | |
2607 | ||
2608 | check_errno (); | |
2609 | if (fd_info[s].flags & FILE_SOCKET) | |
2610 | { | |
2611 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); | |
2612 | if (rc == SOCKET_ERROR) | |
2613 | set_errno (); | |
2614 | return rc; | |
2615 | } | |
2616 | h_errno = ENOTSOCK; | |
2617 | return SOCKET_ERROR; | |
2618 | } | |
2619 | ||
2620 | ||
2621 | int | |
2622 | sys_connect (int s, const struct sockaddr * name, int namelen) | |
2623 | { | |
f249a012 | 2624 | if (winsock_lib == NULL) |
480b0c5b GV |
2625 | { |
2626 | h_errno = ENOTSOCK; | |
2627 | return SOCKET_ERROR; | |
2628 | } | |
2629 | ||
2630 | check_errno (); | |
2631 | if (fd_info[s].flags & FILE_SOCKET) | |
2632 | { | |
2633 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); | |
2634 | if (rc == SOCKET_ERROR) | |
2635 | set_errno (); | |
2636 | return rc; | |
2637 | } | |
2638 | h_errno = ENOTSOCK; | |
2639 | return SOCKET_ERROR; | |
2640 | } | |
2641 | ||
2642 | u_short | |
2643 | sys_htons (u_short hostshort) | |
2644 | { | |
f249a012 | 2645 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2646 | pfn_htons (hostshort) : hostshort; |
2647 | } | |
2648 | ||
2649 | u_short | |
2650 | sys_ntohs (u_short netshort) | |
2651 | { | |
f249a012 | 2652 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2653 | pfn_ntohs (netshort) : netshort; |
2654 | } | |
2655 | ||
2656 | unsigned long | |
2657 | sys_inet_addr (const char * cp) | |
2658 | { | |
f249a012 | 2659 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2660 | pfn_inet_addr (cp) : INADDR_NONE; |
2661 | } | |
2662 | ||
2663 | int | |
2664 | sys_gethostname (char * name, int namelen) | |
2665 | { | |
f249a012 | 2666 | if (winsock_lib != NULL) |
480b0c5b GV |
2667 | return pfn_gethostname (name, namelen); |
2668 | ||
2669 | if (namelen > MAX_COMPUTERNAME_LENGTH) | |
2670 | return !GetComputerName (name, &namelen); | |
2671 | ||
2672 | h_errno = EFAULT; | |
2673 | return SOCKET_ERROR; | |
2674 | } | |
2675 | ||
2676 | struct hostent * | |
2677 | sys_gethostbyname(const char * name) | |
2678 | { | |
2679 | struct hostent * host; | |
2680 | ||
f249a012 | 2681 | if (winsock_lib == NULL) |
480b0c5b GV |
2682 | { |
2683 | h_errno = ENETDOWN; | |
2684 | return NULL; | |
2685 | } | |
2686 | ||
2687 | check_errno (); | |
2688 | host = pfn_gethostbyname (name); | |
2689 | if (!host) | |
2690 | set_errno (); | |
2691 | return host; | |
2692 | } | |
2693 | ||
2694 | struct servent * | |
2695 | sys_getservbyname(const char * name, const char * proto) | |
2696 | { | |
2697 | struct servent * serv; | |
2698 | ||
f249a012 | 2699 | if (winsock_lib == NULL) |
480b0c5b GV |
2700 | { |
2701 | h_errno = ENETDOWN; | |
2702 | return NULL; | |
2703 | } | |
2704 | ||
2705 | check_errno (); | |
2706 | serv = pfn_getservbyname (name, proto); | |
2707 | if (!serv) | |
2708 | set_errno (); | |
2709 | return serv; | |
2710 | } | |
2711 | ||
380961a6 GV |
2712 | int |
2713 | sys_shutdown (int s, int how) | |
2714 | { | |
2715 | int rc; | |
2716 | ||
2717 | if (winsock_lib == NULL) | |
2718 | { | |
2719 | h_errno = ENETDOWN; | |
2720 | return SOCKET_ERROR; | |
2721 | } | |
2722 | ||
2723 | check_errno (); | |
2724 | if (fd_info[s].flags & FILE_SOCKET) | |
2725 | { | |
2726 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); | |
2727 | if (rc == SOCKET_ERROR) | |
2728 | set_errno (); | |
2729 | return rc; | |
2730 | } | |
2731 | h_errno = ENOTSOCK; | |
2732 | return SOCKET_ERROR; | |
2733 | } | |
2734 | ||
480b0c5b GV |
2735 | #endif /* HAVE_SOCKETS */ |
2736 | ||
2737 | ||
2738 | /* Shadow main io functions: we need to handle pipes and sockets more | |
2739 | intelligently, and implement non-blocking mode as well. */ | |
2740 | ||
2741 | int | |
2742 | sys_close (int fd) | |
2743 | { | |
2744 | int rc; | |
2745 | ||
2746 | if (fd < 0 || fd >= MAXDESC) | |
2747 | { | |
2748 | errno = EBADF; | |
2749 | return -1; | |
2750 | } | |
2751 | ||
2752 | if (fd_info[fd].cp) | |
2753 | { | |
2754 | child_process * cp = fd_info[fd].cp; | |
2755 | ||
2756 | fd_info[fd].cp = NULL; | |
2757 | ||
2758 | if (CHILD_ACTIVE (cp)) | |
2759 | { | |
2760 | /* if last descriptor to active child_process then cleanup */ | |
2761 | int i; | |
2762 | for (i = 0; i < MAXDESC; i++) | |
2763 | { | |
2764 | if (i == fd) | |
2765 | continue; | |
2766 | if (fd_info[i].cp == cp) | |
2767 | break; | |
2768 | } | |
2769 | if (i == MAXDESC) | |
2770 | { | |
f249a012 | 2771 | #ifdef HAVE_SOCKETS |
480b0c5b GV |
2772 | if (fd_info[fd].flags & FILE_SOCKET) |
2773 | { | |
f249a012 RS |
2774 | #ifndef SOCK_REPLACE_HANDLE |
2775 | if (winsock_lib == NULL) abort (); | |
480b0c5b GV |
2776 | |
2777 | pfn_shutdown (SOCK_HANDLE (fd), 2); | |
2778 | rc = pfn_closesocket (SOCK_HANDLE (fd)); | |
f249a012 RS |
2779 | #endif |
2780 | winsock_inuse--; /* count open sockets */ | |
480b0c5b GV |
2781 | } |
2782 | #endif | |
2783 | delete_child (cp); | |
2784 | } | |
2785 | } | |
2786 | } | |
2787 | ||
2788 | /* Note that sockets do not need special treatment here (at least on | |
e9e23e23 | 2789 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
480b0c5b GV |
2790 | closesocket is equivalent to CloseHandle, which is to be expected |
2791 | because socket handles are fully fledged kernel handles. */ | |
2792 | rc = _close (fd); | |
2793 | ||
2794 | if (rc == 0) | |
2795 | fd_info[fd].flags = 0; | |
2796 | ||
2797 | return rc; | |
2798 | } | |
2799 | ||
2800 | int | |
2801 | sys_dup (int fd) | |
2802 | { | |
2803 | int new_fd; | |
2804 | ||
2805 | new_fd = _dup (fd); | |
2806 | if (new_fd >= 0) | |
2807 | { | |
2808 | /* duplicate our internal info as well */ | |
2809 | fd_info[new_fd] = fd_info[fd]; | |
2810 | } | |
2811 | return new_fd; | |
2812 | } | |
2813 | ||
2814 | ||
2815 | int | |
2816 | sys_dup2 (int src, int dst) | |
2817 | { | |
2818 | int rc; | |
2819 | ||
2820 | if (dst < 0 || dst >= MAXDESC) | |
2821 | { | |
2822 | errno = EBADF; | |
2823 | return -1; | |
2824 | } | |
2825 | ||
2826 | /* make sure we close the destination first if it's a pipe or socket */ | |
2827 | if (src != dst && fd_info[dst].flags != 0) | |
2828 | sys_close (dst); | |
2829 | ||
2830 | rc = _dup2 (src, dst); | |
2831 | if (rc == 0) | |
2832 | { | |
2833 | /* duplicate our internal info as well */ | |
2834 | fd_info[dst] = fd_info[src]; | |
2835 | } | |
2836 | return rc; | |
2837 | } | |
2838 | ||
480b0c5b GV |
2839 | /* Unix pipe() has only one arg */ |
2840 | int | |
2841 | sys_pipe (int * phandles) | |
2842 | { | |
2843 | int rc; | |
2844 | unsigned flags; | |
2845 | child_process * cp; | |
2846 | ||
76b3903d GV |
2847 | /* make pipe handles non-inheritable; when we spawn a child, we |
2848 | replace the relevant handle with an inheritable one. Also put | |
2849 | pipes into binary mode; we will do text mode translation ourselves | |
2850 | if required. */ | |
2851 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); | |
480b0c5b GV |
2852 | |
2853 | if (rc == 0) | |
2854 | { | |
7664e306 | 2855 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
480b0c5b GV |
2856 | fd_info[phandles[0]].flags = flags; |
2857 | ||
7664e306 | 2858 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
480b0c5b GV |
2859 | fd_info[phandles[1]].flags = flags; |
2860 | } | |
2861 | ||
2862 | return rc; | |
2863 | } | |
2864 | ||
f7554349 | 2865 | /* From ntproc.c */ |
fbd6baed | 2866 | extern Lisp_Object Vw32_pipe_read_delay; |
f7554349 | 2867 | |
480b0c5b GV |
2868 | /* Function to do blocking read of one byte, needed to implement |
2869 | select. It is only allowed on sockets and pipes. */ | |
2870 | int | |
2871 | _sys_read_ahead (int fd) | |
2872 | { | |
2873 | child_process * cp; | |
2874 | int rc; | |
2875 | ||
2876 | if (fd < 0 || fd >= MAXDESC) | |
2877 | return STATUS_READ_ERROR; | |
2878 | ||
2879 | cp = fd_info[fd].cp; | |
2880 | ||
2881 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) | |
2882 | return STATUS_READ_ERROR; | |
2883 | ||
2884 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 | |
2885 | || (fd_info[fd].flags & FILE_READ) == 0) | |
2886 | { | |
2887 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); | |
2888 | abort (); | |
2889 | } | |
2890 | ||
2891 | cp->status = STATUS_READ_IN_PROGRESS; | |
2892 | ||
2893 | if (fd_info[fd].flags & FILE_PIPE) | |
f7554349 | 2894 | { |
f7554349 KH |
2895 | rc = _read (fd, &cp->chr, sizeof (char)); |
2896 | ||
2897 | /* Give subprocess time to buffer some more output for us before | |
e9e23e23 | 2898 | reporting that input is available; we need this because Windows 95 |
f7554349 KH |
2899 | connects DOS programs to pipes by making the pipe appear to be |
2900 | the normal console stdout - as a result most DOS programs will | |
2901 | write to stdout without buffering, ie. one character at a | |
fbd6baed | 2902 | time. Even some W32 programs do this - "dir" in a command |
f7554349 KH |
2903 | shell on NT is very slow if we don't do this. */ |
2904 | if (rc > 0) | |
2905 | { | |
fbd6baed | 2906 | int wait = XINT (Vw32_pipe_read_delay); |
f7554349 KH |
2907 | |
2908 | if (wait > 0) | |
2909 | Sleep (wait); | |
2910 | else if (wait < 0) | |
2911 | while (++wait <= 0) | |
2912 | /* Yield remainder of our time slice, effectively giving a | |
2913 | temporary priority boost to the child process. */ | |
2914 | Sleep (0); | |
2915 | } | |
2916 | } | |
480b0c5b GV |
2917 | #ifdef HAVE_SOCKETS |
2918 | else if (fd_info[fd].flags & FILE_SOCKET) | |
2919 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); | |
2920 | #endif | |
2921 | ||
2922 | if (rc == sizeof (char)) | |
2923 | cp->status = STATUS_READ_SUCCEEDED; | |
2924 | else | |
2925 | cp->status = STATUS_READ_FAILED; | |
2926 | ||
2927 | return cp->status; | |
2928 | } | |
2929 | ||
2930 | int | |
2931 | sys_read (int fd, char * buffer, unsigned int count) | |
2932 | { | |
2933 | int nchars; | |
480b0c5b GV |
2934 | int to_read; |
2935 | DWORD waiting; | |
76b3903d | 2936 | char * orig_buffer = buffer; |
480b0c5b GV |
2937 | |
2938 | if (fd < 0 || fd >= MAXDESC) | |
2939 | { | |
2940 | errno = EBADF; | |
2941 | return -1; | |
2942 | } | |
2943 | ||
2944 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
2945 | { | |
2946 | child_process *cp = fd_info[fd].cp; | |
2947 | ||
2948 | if ((fd_info[fd].flags & FILE_READ) == 0) | |
2949 | { | |
2950 | errno = EBADF; | |
2951 | return -1; | |
2952 | } | |
2953 | ||
76b3903d GV |
2954 | nchars = 0; |
2955 | ||
2956 | /* re-read CR carried over from last read */ | |
2957 | if (fd_info[fd].flags & FILE_LAST_CR) | |
2958 | { | |
2959 | if (fd_info[fd].flags & FILE_BINARY) abort (); | |
2960 | *buffer++ = 0x0d; | |
2961 | count--; | |
2962 | nchars++; | |
f52eb3ef | 2963 | fd_info[fd].flags &= ~FILE_LAST_CR; |
76b3903d GV |
2964 | } |
2965 | ||
480b0c5b GV |
2966 | /* presence of a child_process structure means we are operating in |
2967 | non-blocking mode - otherwise we just call _read directly. | |
2968 | Note that the child_process structure might be missing because | |
2969 | reap_subprocess has been called; in this case the pipe is | |
2970 | already broken, so calling _read on it is okay. */ | |
2971 | if (cp) | |
2972 | { | |
2973 | int current_status = cp->status; | |
2974 | ||
2975 | switch (current_status) | |
2976 | { | |
2977 | case STATUS_READ_FAILED: | |
2978 | case STATUS_READ_ERROR: | |
f52eb3ef GV |
2979 | /* report normal EOF if nothing in buffer */ |
2980 | if (nchars <= 0) | |
2981 | fd_info[fd].flags |= FILE_AT_EOF; | |
2982 | return nchars; | |
480b0c5b GV |
2983 | |
2984 | case STATUS_READ_READY: | |
2985 | case STATUS_READ_IN_PROGRESS: | |
2986 | DebPrint (("sys_read called when read is in progress\n")); | |
2987 | errno = EWOULDBLOCK; | |
2988 | return -1; | |
2989 | ||
2990 | case STATUS_READ_SUCCEEDED: | |
2991 | /* consume read-ahead char */ | |
2992 | *buffer++ = cp->chr; | |
2993 | count--; | |
76b3903d | 2994 | nchars++; |
480b0c5b GV |
2995 | cp->status = STATUS_READ_ACKNOWLEDGED; |
2996 | ResetEvent (cp->char_avail); | |
2997 | ||
2998 | case STATUS_READ_ACKNOWLEDGED: | |
2999 | break; | |
3000 | ||
3001 | default: | |
3002 | DebPrint (("sys_read: bad status %d\n", current_status)); | |
3003 | errno = EBADF; | |
3004 | return -1; | |
3005 | } | |
3006 | ||
3007 | if (fd_info[fd].flags & FILE_PIPE) | |
3008 | { | |
3009 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); | |
3010 | to_read = min (waiting, (DWORD) count); | |
f52eb3ef GV |
3011 | |
3012 | if (to_read > 0) | |
3013 | nchars += _read (fd, buffer, to_read); | |
480b0c5b GV |
3014 | } |
3015 | #ifdef HAVE_SOCKETS | |
3016 | else /* FILE_SOCKET */ | |
3017 | { | |
f249a012 | 3018 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3019 | |
3020 | /* do the equivalent of a non-blocking read */ | |
3021 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); | |
76b3903d | 3022 | if (waiting == 0 && nchars == 0) |
480b0c5b GV |
3023 | { |
3024 | h_errno = errno = EWOULDBLOCK; | |
3025 | return -1; | |
3026 | } | |
3027 | ||
480b0c5b GV |
3028 | if (waiting) |
3029 | { | |
3030 | /* always use binary mode for sockets */ | |
76b3903d GV |
3031 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
3032 | if (res == SOCKET_ERROR) | |
480b0c5b GV |
3033 | { |
3034 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", | |
3035 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
76b3903d GV |
3036 | set_errno (); |
3037 | return -1; | |
480b0c5b | 3038 | } |
76b3903d | 3039 | nchars += res; |
480b0c5b GV |
3040 | } |
3041 | } | |
3042 | #endif | |
3043 | } | |
3044 | else | |
f52eb3ef GV |
3045 | { |
3046 | int nread = _read (fd, buffer, count); | |
3047 | if (nread >= 0) | |
3048 | nchars += nread; | |
3049 | else if (nchars == 0) | |
3050 | nchars = nread; | |
3051 | } | |
76b3903d | 3052 | |
f52eb3ef GV |
3053 | if (nchars <= 0) |
3054 | fd_info[fd].flags |= FILE_AT_EOF; | |
76b3903d | 3055 | /* Perform text mode translation if required. */ |
f52eb3ef | 3056 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
76b3903d GV |
3057 | { |
3058 | nchars = crlf_to_lf (nchars, orig_buffer); | |
3059 | /* If buffer contains only CR, return that. To be absolutely | |
3060 | sure we should attempt to read the next char, but in | |
3061 | practice a CR to be followed by LF would not appear by | |
3062 | itself in the buffer. */ | |
3063 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) | |
3064 | { | |
3065 | fd_info[fd].flags |= FILE_LAST_CR; | |
3066 | nchars--; | |
3067 | } | |
76b3903d | 3068 | } |
480b0c5b GV |
3069 | } |
3070 | else | |
3071 | nchars = _read (fd, buffer, count); | |
3072 | ||
76b3903d | 3073 | return nchars; |
480b0c5b GV |
3074 | } |
3075 | ||
3076 | /* For now, don't bother with a non-blocking mode */ | |
3077 | int | |
3078 | sys_write (int fd, const void * buffer, unsigned int count) | |
3079 | { | |
3080 | int nchars; | |
3081 | ||
3082 | if (fd < 0 || fd >= MAXDESC) | |
3083 | { | |
3084 | errno = EBADF; | |
3085 | return -1; | |
3086 | } | |
3087 | ||
3088 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
76b3903d GV |
3089 | { |
3090 | if ((fd_info[fd].flags & FILE_WRITE) == 0) | |
3091 | { | |
3092 | errno = EBADF; | |
3093 | return -1; | |
3094 | } | |
3095 | ||
3096 | /* Perform text mode translation if required. */ | |
3097 | if ((fd_info[fd].flags & FILE_BINARY) == 0) | |
3098 | { | |
3099 | char * tmpbuf = alloca (count * 2); | |
3100 | unsigned char * src = (void *)buffer; | |
3101 | unsigned char * dst = tmpbuf; | |
3102 | int nbytes = count; | |
3103 | ||
3104 | while (1) | |
3105 | { | |
3106 | unsigned char *next; | |
3107 | /* copy next line or remaining bytes */ | |
3108 | next = _memccpy (dst, src, '\n', nbytes); | |
3109 | if (next) | |
3110 | { | |
3111 | /* copied one line ending with '\n' */ | |
3112 | int copied = next - dst; | |
3113 | nbytes -= copied; | |
3114 | src += copied; | |
3115 | /* insert '\r' before '\n' */ | |
3116 | next[-1] = '\r'; | |
3117 | next[0] = '\n'; | |
3118 | dst = next + 1; | |
3119 | count++; | |
3120 | } | |
3121 | else | |
3122 | /* copied remaining partial line -> now finished */ | |
3123 | break; | |
3124 | } | |
3125 | buffer = tmpbuf; | |
3126 | } | |
3127 | } | |
3128 | ||
480b0c5b GV |
3129 | #ifdef HAVE_SOCKETS |
3130 | if (fd_info[fd].flags & FILE_SOCKET) | |
3131 | { | |
f249a012 | 3132 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3133 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
3134 | if (nchars == SOCKET_ERROR) | |
3135 | { | |
3136 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", | |
3137 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
3138 | set_errno (); | |
3139 | } | |
3140 | } | |
3141 | else | |
3142 | #endif | |
3143 | nchars = _write (fd, buffer, count); | |
3144 | ||
3145 | return nchars; | |
3146 | } | |
3147 | ||
f52eb3ef GV |
3148 | static void |
3149 | check_windows_init_file () | |
3150 | { | |
3151 | extern int noninteractive, inhibit_window_system; | |
3152 | ||
3153 | /* A common indication that Emacs is not installed properly is when | |
3154 | it cannot find the Windows installation file. If this file does | |
3155 | not exist in the expected place, tell the user. */ | |
3156 | ||
d54abccd GV |
3157 | if (!noninteractive && !inhibit_window_system) |
3158 | { | |
3159 | extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p; | |
a0b9c838 | 3160 | Lisp_Object objs[2]; |
96ef7d42 | 3161 | Lisp_Object full_load_path; |
d54abccd GV |
3162 | Lisp_Object init_file; |
3163 | int fd; | |
f52eb3ef | 3164 | |
a0b9c838 GV |
3165 | objs[0] = Vload_path; |
3166 | objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH"))); | |
3167 | full_load_path = Fappend (2, objs); | |
d54abccd | 3168 | init_file = build_string ("term/w32-win"); |
96ef7d42 | 3169 | fd = openp (full_load_path, init_file, ".el:.elc", NULL, 0); |
d54abccd GV |
3170 | if (fd < 0) |
3171 | { | |
96ef7d42 | 3172 | Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil); |
d54abccd GV |
3173 | char *init_file_name = XSTRING (init_file)->data; |
3174 | char *load_path = XSTRING (load_path_print)->data; | |
3175 | char *buffer = alloca (1024); | |
3176 | ||
3177 | sprintf (buffer, | |
3178 | "The Emacs Windows initialization file \"%s.el\" " | |
3179 | "could not be found in your Emacs installation. " | |
3180 | "Emacs checked the following directories for this file:\n" | |
3181 | "\n%s\n\n" | |
3182 | "When Emacs cannot find this file, it usually means that it " | |
3183 | "was not installed properly, or its distribution file was " | |
3184 | "not unpacked properly.\nSee the README.W32 file in the " | |
3185 | "top-level Emacs directory for more information.", | |
3186 | init_file_name, load_path); | |
3187 | MessageBox (NULL, | |
3188 | buffer, | |
3189 | "Emacs Abort Dialog", | |
3190 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); | |
f52eb3ef GV |
3191 | /* Use the low-level Emacs abort. */ |
3192 | #undef abort | |
d54abccd GV |
3193 | abort (); |
3194 | } | |
3195 | else | |
3196 | { | |
3197 | close (fd); | |
3198 | } | |
f52eb3ef | 3199 | } |
f52eb3ef | 3200 | } |
480b0c5b GV |
3201 | |
3202 | void | |
3203 | term_ntproc () | |
3204 | { | |
3205 | #ifdef HAVE_SOCKETS | |
3206 | /* shutdown the socket interface if necessary */ | |
3207 | term_winsock (); | |
3208 | #endif | |
3209 | } | |
3210 | ||
3211 | void | |
3212 | init_ntproc () | |
3213 | { | |
3214 | #ifdef HAVE_SOCKETS | |
f249a012 RS |
3215 | /* Initialise the socket interface now if available and requested by |
3216 | the user by defining PRELOAD_WINSOCK; otherwise loading will be | |
fbd6baed | 3217 | delayed until open-network-stream is called (w32-has-winsock can |
f249a012 RS |
3218 | also be used to dynamically load or reload winsock). |
3219 | ||
3220 | Conveniently, init_environment is called before us, so | |
3221 | PRELOAD_WINSOCK can be set in the registry. */ | |
3222 | ||
3223 | /* Always initialize this correctly. */ | |
3224 | winsock_lib = NULL; | |
3225 | ||
3226 | if (getenv ("PRELOAD_WINSOCK") != NULL) | |
3227 | init_winsock (TRUE); | |
480b0c5b GV |
3228 | #endif |
3229 | ||
3230 | /* Initial preparation for subprocess support: replace our standard | |
3231 | handles with non-inheritable versions. */ | |
3232 | { | |
3233 | HANDLE parent; | |
3234 | HANDLE stdin_save = INVALID_HANDLE_VALUE; | |
3235 | HANDLE stdout_save = INVALID_HANDLE_VALUE; | |
3236 | HANDLE stderr_save = INVALID_HANDLE_VALUE; | |
3237 | ||
3238 | parent = GetCurrentProcess (); | |
3239 | ||
3240 | /* ignore errors when duplicating and closing; typically the | |
3241 | handles will be invalid when running as a gui program. */ | |
3242 | DuplicateHandle (parent, | |
3243 | GetStdHandle (STD_INPUT_HANDLE), | |
3244 | parent, | |
3245 | &stdin_save, | |
3246 | 0, | |
3247 | FALSE, | |
3248 | DUPLICATE_SAME_ACCESS); | |
3249 | ||
3250 | DuplicateHandle (parent, | |
3251 | GetStdHandle (STD_OUTPUT_HANDLE), | |
3252 | parent, | |
3253 | &stdout_save, | |
3254 | 0, | |
3255 | FALSE, | |
3256 | DUPLICATE_SAME_ACCESS); | |
3257 | ||
3258 | DuplicateHandle (parent, | |
3259 | GetStdHandle (STD_ERROR_HANDLE), | |
3260 | parent, | |
3261 | &stderr_save, | |
3262 | 0, | |
3263 | FALSE, | |
3264 | DUPLICATE_SAME_ACCESS); | |
3265 | ||
3266 | fclose (stdin); | |
3267 | fclose (stdout); | |
3268 | fclose (stderr); | |
3269 | ||
3270 | if (stdin_save != INVALID_HANDLE_VALUE) | |
3271 | _open_osfhandle ((long) stdin_save, O_TEXT); | |
3272 | else | |
76b3903d GV |
3273 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
3274 | _fdopen (0, "r"); | |
480b0c5b GV |
3275 | |
3276 | if (stdout_save != INVALID_HANDLE_VALUE) | |
3277 | _open_osfhandle ((long) stdout_save, O_TEXT); | |
3278 | else | |
76b3903d GV |
3279 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3280 | _fdopen (1, "w"); | |
480b0c5b GV |
3281 | |
3282 | if (stderr_save != INVALID_HANDLE_VALUE) | |
3283 | _open_osfhandle ((long) stderr_save, O_TEXT); | |
3284 | else | |
76b3903d GV |
3285 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3286 | _fdopen (2, "w"); | |
480b0c5b GV |
3287 | } |
3288 | ||
3289 | /* unfortunately, atexit depends on implementation of malloc */ | |
3290 | /* atexit (term_ntproc); */ | |
3291 | signal (SIGABRT, term_ntproc); | |
76b3903d GV |
3292 | |
3293 | /* determine which drives are fixed, for GetCachedVolumeInformation */ | |
3294 | { | |
3295 | /* GetDriveType must have trailing backslash. */ | |
3296 | char drive[] = "A:\\"; | |
3297 | ||
3298 | /* Loop over all possible drive letters */ | |
3299 | while (*drive <= 'Z') | |
3300 | { | |
3301 | /* Record if this drive letter refers to a fixed drive. */ | |
3302 | fixed_drives[DRIVE_INDEX (*drive)] = | |
3303 | (GetDriveType (drive) == DRIVE_FIXED); | |
3304 | ||
3305 | (*drive)++; | |
3306 | } | |
3307 | } | |
d54abccd GV |
3308 | |
3309 | /* Check to see if Emacs has been installed correctly. */ | |
3310 | check_windows_init_file (); | |
480b0c5b GV |
3311 | } |
3312 | ||
3313 | /* end of nt.c */ |