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