Commit | Line | Data |
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e9e23e23 | 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
35f0d482 | 2 | Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
95ed0025 | 3 | |
3b7ad313 EN |
4 | This file is part of GNU Emacs. |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. | |
95ed0025 RS |
20 | |
21 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 | |
22 | */ | |
23 | ||
00b3b7b3 | 24 | |
76b3903d | 25 | #include <stddef.h> /* for offsetof */ |
95ed0025 RS |
26 | #include <stdlib.h> |
27 | #include <stdio.h> | |
28 | #include <io.h> | |
480b0c5b | 29 | #include <errno.h> |
95ed0025 RS |
30 | #include <fcntl.h> |
31 | #include <ctype.h> | |
480b0c5b | 32 | #include <signal.h> |
b3308d2e | 33 | #include <sys/file.h> |
480b0c5b | 34 | #include <sys/time.h> |
16bb7578 | 35 | #include <sys/utime.h> |
480b0c5b GV |
36 | |
37 | /* must include CRT headers *before* config.h */ | |
38 | #include "config.h" | |
39 | #undef access | |
40 | #undef chdir | |
41 | #undef chmod | |
42 | #undef creat | |
43 | #undef ctime | |
44 | #undef fopen | |
45 | #undef link | |
46 | #undef mkdir | |
47 | #undef mktemp | |
48 | #undef open | |
49 | #undef rename | |
50 | #undef rmdir | |
51 | #undef unlink | |
52 | ||
53 | #undef close | |
54 | #undef dup | |
55 | #undef dup2 | |
56 | #undef pipe | |
57 | #undef read | |
58 | #undef write | |
95ed0025 | 59 | |
95ed0025 | 60 | #include "lisp.h" |
95ed0025 RS |
61 | |
62 | #include <pwd.h> | |
63 | ||
480b0c5b | 64 | #include <windows.h> |
00b3b7b3 | 65 | |
480b0c5b GV |
66 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
67 | #include <sys/socket.h> | |
68 | #undef socket | |
69 | #undef bind | |
70 | #undef connect | |
71 | #undef htons | |
72 | #undef ntohs | |
73 | #undef inet_addr | |
74 | #undef gethostname | |
75 | #undef gethostbyname | |
76 | #undef getservbyname | |
380961a6 | 77 | #undef shutdown |
480b0c5b | 78 | #endif |
00b3b7b3 | 79 | |
489f9371 | 80 | #include "w32.h" |
480b0c5b | 81 | #include "ndir.h" |
489f9371 | 82 | #include "w32heap.h" |
76b3903d | 83 | |
03887dd3 KH |
84 | #undef min |
85 | #undef max | |
86 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
87 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
88 | ||
76b3903d GV |
89 | extern Lisp_Object Vw32_downcase_file_names; |
90 | extern Lisp_Object Vw32_generate_fake_inodes; | |
91 | extern Lisp_Object Vw32_get_true_file_attributes; | |
92 | ||
93 | static char startup_dir[MAXPATHLEN]; | |
00b3b7b3 | 94 | |
95ed0025 | 95 | /* Get the current working directory. */ |
480b0c5b | 96 | char * |
95ed0025 RS |
97 | getwd (char *dir) |
98 | { | |
76b3903d | 99 | #if 0 |
480b0c5b GV |
100 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
101 | return dir; | |
102 | return NULL; | |
76b3903d GV |
103 | #else |
104 | /* Emacs doesn't actually change directory itself, and we want to | |
105 | force our real wd to be where emacs.exe is to avoid unnecessary | |
106 | conflicts when trying to rename or delete directories. */ | |
107 | strcpy (dir, startup_dir); | |
108 | return dir; | |
109 | #endif | |
95ed0025 RS |
110 | } |
111 | ||
480b0c5b | 112 | #ifndef HAVE_SOCKETS |
95ed0025 RS |
113 | /* Emulate gethostname. */ |
114 | int | |
115 | gethostname (char *buffer, int size) | |
116 | { | |
117 | /* NT only allows small host names, so the buffer is | |
118 | certainly large enough. */ | |
119 | return !GetComputerName (buffer, &size); | |
120 | } | |
480b0c5b | 121 | #endif /* HAVE_SOCKETS */ |
95ed0025 RS |
122 | |
123 | /* Emulate getloadavg. */ | |
124 | int | |
125 | getloadavg (double loadavg[], int nelem) | |
126 | { | |
127 | int i; | |
128 | ||
129 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
130 | for (i = 0; i < nelem; i++) | |
131 | { | |
132 | loadavg[i] = 0.0; | |
133 | } | |
134 | return i; | |
135 | } | |
136 | ||
480b0c5b | 137 | /* Emulate getpwuid, getpwnam and others. */ |
95ed0025 | 138 | |
051fe60d GV |
139 | #define PASSWD_FIELD_SIZE 256 |
140 | ||
141 | static char the_passwd_name[PASSWD_FIELD_SIZE]; | |
142 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; | |
143 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; | |
144 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; | |
145 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; | |
95ed0025 RS |
146 | |
147 | static struct passwd the_passwd = | |
148 | { | |
149 | the_passwd_name, | |
150 | the_passwd_passwd, | |
151 | 0, | |
152 | 0, | |
153 | 0, | |
154 | the_passwd_gecos, | |
155 | the_passwd_dir, | |
156 | the_passwd_shell, | |
157 | }; | |
158 | ||
480b0c5b GV |
159 | int |
160 | getuid () | |
161 | { | |
162 | return the_passwd.pw_uid; | |
163 | } | |
164 | ||
165 | int | |
166 | geteuid () | |
167 | { | |
168 | /* I could imagine arguing for checking to see whether the user is | |
169 | in the Administrators group and returning a UID of 0 for that | |
170 | case, but I don't know how wise that would be in the long run. */ | |
171 | return getuid (); | |
172 | } | |
173 | ||
174 | int | |
175 | getgid () | |
176 | { | |
177 | return the_passwd.pw_gid; | |
178 | } | |
179 | ||
180 | int | |
181 | getegid () | |
182 | { | |
183 | return getgid (); | |
184 | } | |
185 | ||
95ed0025 RS |
186 | struct passwd * |
187 | getpwuid (int uid) | |
188 | { | |
480b0c5b GV |
189 | if (uid == the_passwd.pw_uid) |
190 | return &the_passwd; | |
191 | return NULL; | |
95ed0025 RS |
192 | } |
193 | ||
194 | struct passwd * | |
195 | getpwnam (char *name) | |
196 | { | |
197 | struct passwd *pw; | |
198 | ||
199 | pw = getpwuid (getuid ()); | |
200 | if (!pw) | |
201 | return pw; | |
202 | ||
480b0c5b | 203 | if (stricmp (name, pw->pw_name)) |
95ed0025 RS |
204 | return NULL; |
205 | ||
206 | return pw; | |
207 | } | |
208 | ||
480b0c5b GV |
209 | void |
210 | init_user_info () | |
95ed0025 | 211 | { |
480b0c5b GV |
212 | /* Find the user's real name by opening the process token and |
213 | looking up the name associated with the user-sid in that token. | |
214 | ||
215 | Use the relative portion of the identifier authority value from | |
216 | the user-sid as the user id value (same for group id using the | |
217 | primary group sid from the process token). */ | |
218 | ||
219 | char user_sid[256], name[256], domain[256]; | |
220 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; | |
221 | HANDLE token = NULL; | |
222 | SID_NAME_USE user_type; | |
223 | ||
224 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) | |
225 | && GetTokenInformation (token, TokenUser, | |
226 | (PVOID) user_sid, sizeof (user_sid), &trash) | |
227 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, | |
228 | domain, &dlength, &user_type)) | |
d1c1c3d2 | 229 | { |
480b0c5b GV |
230 | strcpy (the_passwd.pw_name, name); |
231 | /* Determine a reasonable uid value. */ | |
232 | if (stricmp ("administrator", name) == 0) | |
233 | { | |
234 | the_passwd.pw_uid = 0; | |
235 | the_passwd.pw_gid = 0; | |
236 | } | |
237 | else | |
238 | { | |
239 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
240 | ||
241 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
242 | /* I believe the relative portion is the last 4 bytes (of 6) | |
243 | with msb first. */ | |
244 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + | |
245 | (pSIA->Value[3] << 16) + | |
246 | (pSIA->Value[4] << 8) + | |
247 | (pSIA->Value[5] << 0)); | |
248 | /* restrict to conventional uid range for normal users */ | |
249 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; | |
250 | ||
251 | /* Get group id */ | |
252 | if (GetTokenInformation (token, TokenPrimaryGroup, | |
253 | (PVOID) user_sid, sizeof (user_sid), &trash)) | |
254 | { | |
255 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
256 | ||
257 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
258 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + | |
259 | (pSIA->Value[3] << 16) + | |
260 | (pSIA->Value[4] << 8) + | |
261 | (pSIA->Value[5] << 0)); | |
262 | /* I don't know if this is necessary, but for safety... */ | |
263 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; | |
264 | } | |
265 | else | |
266 | the_passwd.pw_gid = the_passwd.pw_uid; | |
267 | } | |
268 | } | |
269 | /* If security calls are not supported (presumably because we | |
270 | are running under Windows 95), fallback to this. */ | |
271 | else if (GetUserName (name, &length)) | |
272 | { | |
273 | strcpy (the_passwd.pw_name, name); | |
274 | if (stricmp ("administrator", name) == 0) | |
275 | the_passwd.pw_uid = 0; | |
276 | else | |
277 | the_passwd.pw_uid = 123; | |
278 | the_passwd.pw_gid = the_passwd.pw_uid; | |
279 | } | |
280 | else | |
281 | { | |
282 | strcpy (the_passwd.pw_name, "unknown"); | |
283 | the_passwd.pw_uid = 123; | |
284 | the_passwd.pw_gid = 123; | |
d1c1c3d2 | 285 | } |
95ed0025 | 286 | |
480b0c5b GV |
287 | /* Ensure HOME and SHELL are defined. */ |
288 | if (getenv ("HOME") == NULL) | |
289 | putenv ("HOME=c:/"); | |
290 | if (getenv ("SHELL") == NULL) | |
76b3903d | 291 | putenv (os_subtype == OS_WIN95 ? "SHELL=command" : "SHELL=cmd"); |
95ed0025 | 292 | |
480b0c5b GV |
293 | /* Set dir and shell from environment variables. */ |
294 | strcpy (the_passwd.pw_dir, getenv ("HOME")); | |
295 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); | |
bd4a449f | 296 | |
480b0c5b GV |
297 | if (token) |
298 | CloseHandle (token); | |
95ed0025 RS |
299 | } |
300 | ||
95ed0025 | 301 | int |
480b0c5b | 302 | random () |
95ed0025 | 303 | { |
480b0c5b GV |
304 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
305 | return ((rand () << 15) | rand ()); | |
95ed0025 RS |
306 | } |
307 | ||
95ed0025 | 308 | void |
480b0c5b | 309 | srandom (int seed) |
95ed0025 | 310 | { |
480b0c5b | 311 | srand (seed); |
95ed0025 RS |
312 | } |
313 | ||
76b3903d | 314 | |
cbe39279 RS |
315 | /* Normalize filename by converting all path separators to |
316 | the specified separator. Also conditionally convert upper | |
317 | case path name components to lower case. */ | |
318 | ||
319 | static void | |
320 | normalize_filename (fp, path_sep) | |
321 | register char *fp; | |
322 | char path_sep; | |
323 | { | |
324 | char sep; | |
325 | char *elem; | |
326 | ||
5162ffce MB |
327 | /* Always lower-case drive letters a-z, even if the filesystem |
328 | preserves case in filenames. | |
329 | This is so filenames can be compared by string comparison | |
330 | functions that are case-sensitive. Even case-preserving filesystems | |
331 | do not distinguish case in drive letters. */ | |
332 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') | |
333 | { | |
334 | *fp += 'a' - 'A'; | |
335 | fp += 2; | |
336 | } | |
337 | ||
fbd6baed | 338 | if (NILP (Vw32_downcase_file_names)) |
cbe39279 RS |
339 | { |
340 | while (*fp) | |
341 | { | |
342 | if (*fp == '/' || *fp == '\\') | |
343 | *fp = path_sep; | |
344 | fp++; | |
345 | } | |
346 | return; | |
347 | } | |
348 | ||
349 | sep = path_sep; /* convert to this path separator */ | |
350 | elem = fp; /* start of current path element */ | |
351 | ||
352 | do { | |
353 | if (*fp >= 'a' && *fp <= 'z') | |
354 | elem = 0; /* don't convert this element */ | |
355 | ||
356 | if (*fp == 0 || *fp == ':') | |
357 | { | |
358 | sep = *fp; /* restore current separator (or 0) */ | |
359 | *fp = '/'; /* after conversion of this element */ | |
360 | } | |
361 | ||
362 | if (*fp == '/' || *fp == '\\') | |
363 | { | |
364 | if (elem && elem != fp) | |
365 | { | |
366 | *fp = 0; /* temporary end of string */ | |
367 | _strlwr (elem); /* while we convert to lower case */ | |
368 | } | |
369 | *fp = sep; /* convert (or restore) path separator */ | |
370 | elem = fp + 1; /* next element starts after separator */ | |
371 | sep = path_sep; | |
372 | } | |
373 | } while (*fp++); | |
374 | } | |
375 | ||
480b0c5b | 376 | /* Destructively turn backslashes into slashes. */ |
95ed0025 | 377 | void |
480b0c5b GV |
378 | dostounix_filename (p) |
379 | register char *p; | |
95ed0025 | 380 | { |
cbe39279 | 381 | normalize_filename (p, '/'); |
95ed0025 RS |
382 | } |
383 | ||
480b0c5b | 384 | /* Destructively turn slashes into backslashes. */ |
95ed0025 | 385 | void |
480b0c5b GV |
386 | unixtodos_filename (p) |
387 | register char *p; | |
95ed0025 | 388 | { |
cbe39279 | 389 | normalize_filename (p, '\\'); |
95ed0025 RS |
390 | } |
391 | ||
480b0c5b GV |
392 | /* Remove all CR's that are followed by a LF. |
393 | (From msdos.c...probably should figure out a way to share it, | |
394 | although this code isn't going to ever change.) */ | |
35f0d482 | 395 | int |
480b0c5b GV |
396 | crlf_to_lf (n, buf) |
397 | register int n; | |
398 | register unsigned char *buf; | |
35f0d482 | 399 | { |
480b0c5b GV |
400 | unsigned char *np = buf; |
401 | unsigned char *startp = buf; | |
402 | unsigned char *endp = buf + n; | |
35f0d482 | 403 | |
480b0c5b GV |
404 | if (n == 0) |
405 | return n; | |
406 | while (buf < endp - 1) | |
95ed0025 | 407 | { |
480b0c5b GV |
408 | if (*buf == 0x0d) |
409 | { | |
410 | if (*(++buf) != 0x0a) | |
411 | *np++ = 0x0d; | |
412 | } | |
413 | else | |
414 | *np++ = *buf++; | |
95ed0025 | 415 | } |
480b0c5b GV |
416 | if (buf < endp) |
417 | *np++ = *buf++; | |
418 | return np - startp; | |
95ed0025 RS |
419 | } |
420 | ||
76b3903d GV |
421 | /* Parse the root part of file name, if present. Return length and |
422 | optionally store pointer to char after root. */ | |
423 | static int | |
424 | parse_root (char * name, char ** pPath) | |
425 | { | |
426 | char * start = name; | |
427 | ||
428 | if (name == NULL) | |
429 | return 0; | |
430 | ||
431 | /* find the root name of the volume if given */ | |
432 | if (isalpha (name[0]) && name[1] == ':') | |
433 | { | |
434 | /* skip past drive specifier */ | |
435 | name += 2; | |
436 | if (IS_DIRECTORY_SEP (name[0])) | |
437 | name++; | |
438 | } | |
439 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
440 | { | |
441 | int slashes = 2; | |
442 | name += 2; | |
443 | do | |
444 | { | |
445 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
446 | break; | |
447 | name++; | |
448 | } | |
449 | while ( *name ); | |
450 | if (IS_DIRECTORY_SEP (name[0])) | |
451 | name++; | |
452 | } | |
453 | ||
454 | if (pPath) | |
455 | *pPath = name; | |
456 | ||
457 | return name - start; | |
458 | } | |
459 | ||
460 | /* Get long base name for name; name is assumed to be absolute. */ | |
461 | static int | |
462 | get_long_basename (char * name, char * buf, int size) | |
463 | { | |
464 | WIN32_FIND_DATA find_data; | |
465 | HANDLE dir_handle; | |
466 | int len = 0; | |
467 | ||
bb1584c8 RS |
468 | /* must be valid filename, no wild cards or other illegal characters */ |
469 | if (strpbrk (name, "*?|<>\"")) | |
470 | return 0; | |
471 | ||
76b3903d GV |
472 | dir_handle = FindFirstFile (name, &find_data); |
473 | if (dir_handle != INVALID_HANDLE_VALUE) | |
474 | { | |
475 | if ((len = strlen (find_data.cFileName)) < size) | |
476 | memcpy (buf, find_data.cFileName, len + 1); | |
477 | else | |
478 | len = 0; | |
479 | FindClose (dir_handle); | |
480 | } | |
481 | return len; | |
482 | } | |
483 | ||
484 | /* Get long name for file, if possible (assumed to be absolute). */ | |
485 | BOOL | |
486 | w32_get_long_filename (char * name, char * buf, int size) | |
487 | { | |
488 | char * o = buf; | |
489 | char * p; | |
490 | char * q; | |
491 | char full[ MAX_PATH ]; | |
492 | int len; | |
493 | ||
494 | len = strlen (name); | |
495 | if (len >= MAX_PATH) | |
496 | return FALSE; | |
497 | ||
498 | /* Use local copy for destructive modification. */ | |
499 | memcpy (full, name, len+1); | |
500 | unixtodos_filename (full); | |
501 | ||
502 | /* Copy root part verbatim. */ | |
503 | len = parse_root (full, &p); | |
504 | memcpy (o, full, len); | |
505 | o += len; | |
506 | size -= len; | |
507 | ||
508 | do | |
509 | { | |
510 | q = p; | |
511 | p = strchr (q, '\\'); | |
512 | if (p) *p = '\0'; | |
513 | len = get_long_basename (full, o, size); | |
514 | if (len > 0) | |
515 | { | |
516 | o += len; | |
517 | size -= len; | |
518 | if (p != NULL) | |
519 | { | |
520 | *p++ = '\\'; | |
521 | if (size < 2) | |
522 | return FALSE; | |
523 | *o++ = '\\'; | |
524 | size--; | |
525 | *o = '\0'; | |
526 | } | |
527 | } | |
528 | else | |
529 | return FALSE; | |
530 | } | |
531 | while (p != NULL && *p); | |
532 | ||
533 | return TRUE; | |
534 | } | |
535 | ||
536 | ||
95ed0025 RS |
537 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
538 | ||
95ed0025 RS |
539 | int |
540 | sigsetmask (int signal_mask) | |
541 | { | |
542 | return 0; | |
543 | } | |
544 | ||
545 | int | |
546 | sigblock (int sig) | |
547 | { | |
548 | return 0; | |
549 | } | |
550 | ||
95ed0025 RS |
551 | int |
552 | setpgrp (int pid, int gid) | |
553 | { | |
554 | return 0; | |
555 | } | |
556 | ||
557 | int | |
558 | alarm (int seconds) | |
559 | { | |
560 | return 0; | |
561 | } | |
562 | ||
c6624584 | 563 | void |
95ed0025 RS |
564 | unrequest_sigio (void) |
565 | { | |
c6624584 | 566 | return; |
95ed0025 RS |
567 | } |
568 | ||
c6624584 | 569 | void |
95ed0025 RS |
570 | request_sigio (void) |
571 | { | |
c6624584 | 572 | return; |
95ed0025 RS |
573 | } |
574 | ||
480b0c5b | 575 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
f332b293 GV |
576 | |
577 | LPBYTE | |
fbd6baed | 578 | w32_get_resource (key, lpdwtype) |
f332b293 GV |
579 | char *key; |
580 | LPDWORD lpdwtype; | |
581 | { | |
582 | LPBYTE lpvalue; | |
583 | HKEY hrootkey = NULL; | |
584 | DWORD cbData; | |
585 | BOOL ok = FALSE; | |
586 | ||
587 | /* Check both the current user and the local machine to see if | |
588 | we have any resources. */ | |
589 | ||
590 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
591 | { | |
592 | lpvalue = NULL; | |
593 | ||
594 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS | |
595 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
596 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
597 | { | |
598 | return (lpvalue); | |
599 | } | |
600 | ||
601 | if (lpvalue) xfree (lpvalue); | |
602 | ||
603 | RegCloseKey (hrootkey); | |
604 | } | |
605 | ||
606 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
607 | { | |
608 | lpvalue = NULL; | |
609 | ||
76b3903d GV |
610 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
611 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
612 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
f332b293 GV |
613 | { |
614 | return (lpvalue); | |
615 | } | |
616 | ||
617 | if (lpvalue) xfree (lpvalue); | |
618 | ||
619 | RegCloseKey (hrootkey); | |
620 | } | |
621 | ||
622 | return (NULL); | |
623 | } | |
624 | ||
75b08edb GV |
625 | char *get_emacs_configuration (void); |
626 | extern Lisp_Object Vsystem_configuration; | |
627 | ||
f332b293 GV |
628 | void |
629 | init_environment () | |
630 | { | |
b3308d2e KH |
631 | int len; |
632 | static const char * const tempdirs[] = { | |
633 | "$TMPDIR", "$TEMP", "$TMP", "c:/" | |
634 | }; | |
635 | int i; | |
636 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); | |
637 | ||
638 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use | |
639 | temporary files and assume "/tmp" if $TMPDIR is unset, which | |
640 | will break on DOS/Windows. Refuse to work if we cannot find | |
641 | a directory, not even "c:/", usable for that purpose. */ | |
642 | for (i = 0; i < imax ; i++) | |
643 | { | |
644 | const char *tmp = tempdirs[i]; | |
645 | ||
646 | if (*tmp == '$') | |
647 | tmp = getenv (tmp + 1); | |
648 | /* Note that `access' can lie to us if the directory resides on a | |
649 | read-only filesystem, like CD-ROM or a write-protected floppy. | |
650 | The only way to be really sure is to actually create a file and | |
651 | see if it succeeds. But I think that's too much to ask. */ | |
652 | if (tmp && access (tmp, D_OK) == 0) | |
653 | { | |
654 | char * var = alloca (strlen (tmp) + 8); | |
655 | sprintf (var, "TMPDIR=%s", tmp); | |
656 | putenv (var); | |
657 | break; | |
658 | } | |
659 | } | |
660 | if (i >= imax) | |
661 | cmd_error_internal | |
662 | (Fcons (Qerror, | |
663 | Fcons (build_string ("no usable temporary directories found!!"), | |
664 | Qnil)), | |
665 | "While setting TMPDIR: "); | |
666 | ||
f332b293 GV |
667 | /* Check for environment variables and use registry if they don't exist */ |
668 | { | |
480b0c5b GV |
669 | int i; |
670 | LPBYTE lpval; | |
671 | DWORD dwType; | |
f332b293 | 672 | |
480b0c5b GV |
673 | static char * env_vars[] = |
674 | { | |
675 | "HOME", | |
f249a012 | 676 | "PRELOAD_WINSOCK", |
480b0c5b GV |
677 | "emacs_dir", |
678 | "EMACSLOADPATH", | |
679 | "SHELL", | |
76b3903d | 680 | "CMDPROXY", |
480b0c5b GV |
681 | "EMACSDATA", |
682 | "EMACSPATH", | |
683 | "EMACSLOCKDIR", | |
76b3903d GV |
684 | /* We no longer set INFOPATH because Info-default-directory-list |
685 | is then ignored. We use a hook in winnt.el instead. */ | |
686 | /* "INFOPATH", */ | |
480b0c5b GV |
687 | "EMACSDOC", |
688 | "TERM", | |
689 | }; | |
690 | ||
691 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) | |
f332b293 | 692 | { |
76b3903d GV |
693 | if (!getenv (env_vars[i]) |
694 | && (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL) | |
480b0c5b GV |
695 | { |
696 | if (dwType == REG_EXPAND_SZ) | |
697 | { | |
698 | char buf1[500], buf2[500]; | |
699 | ||
700 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, 500); | |
701 | _snprintf (buf2, 499, "%s=%s", env_vars[i], buf1); | |
702 | putenv (strdup (buf2)); | |
703 | } | |
704 | else if (dwType == REG_SZ) | |
705 | { | |
706 | char buf[500]; | |
f332b293 | 707 | |
480b0c5b GV |
708 | _snprintf (buf, 499, "%s=%s", env_vars[i], lpval); |
709 | putenv (strdup (buf)); | |
710 | } | |
f332b293 | 711 | |
480b0c5b GV |
712 | xfree (lpval); |
713 | } | |
714 | } | |
715 | } | |
716 | ||
75b08edb GV |
717 | /* Rebuild system configuration to reflect invoking system. */ |
718 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); | |
719 | ||
76b3903d GV |
720 | /* Another special case: on NT, the PATH variable is actually named |
721 | "Path" although cmd.exe (perhaps NT itself) arranges for | |
722 | environment variable lookup and setting to be case insensitive. | |
723 | However, Emacs assumes a fully case sensitive environment, so we | |
724 | need to change "Path" to "PATH" to match the expectations of | |
725 | various elisp packages. We do this by the sneaky method of | |
726 | modifying the string in the C runtime environ entry. | |
727 | ||
728 | The same applies to COMSPEC. */ | |
729 | { | |
730 | char ** envp; | |
731 | ||
732 | for (envp = environ; *envp; envp++) | |
733 | if (_strnicmp (*envp, "PATH=", 5) == 0) | |
734 | memcpy (*envp, "PATH=", 5); | |
735 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) | |
736 | memcpy (*envp, "COMSPEC=", 8); | |
737 | } | |
738 | ||
739 | /* Remember the initial working directory for getwd, then make the | |
740 | real wd be the location of emacs.exe to avoid conflicts when | |
741 | renaming or deleting directories. (We also don't call chdir when | |
742 | running subprocesses for the same reason.) */ | |
743 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) | |
744 | abort (); | |
745 | ||
746 | { | |
747 | char *p; | |
748 | char modname[MAX_PATH]; | |
749 | ||
750 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) | |
751 | abort (); | |
752 | if ((p = strrchr (modname, '\\')) == NULL) | |
753 | abort (); | |
754 | *p = 0; | |
755 | ||
756 | SetCurrentDirectory (modname); | |
757 | } | |
758 | ||
480b0c5b GV |
759 | init_user_info (); |
760 | } | |
761 | ||
762 | /* We don't have scripts to automatically determine the system configuration | |
763 | for Emacs before it's compiled, and we don't want to have to make the | |
764 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime | |
765 | routine. */ | |
766 | ||
767 | static char configuration_buffer[32]; | |
768 | ||
769 | char * | |
770 | get_emacs_configuration (void) | |
771 | { | |
772 | char *arch, *oem, *os; | |
773 | ||
774 | /* Determine the processor type. */ | |
775 | switch (get_processor_type ()) | |
776 | { | |
777 | ||
778 | #ifdef PROCESSOR_INTEL_386 | |
779 | case PROCESSOR_INTEL_386: | |
780 | case PROCESSOR_INTEL_486: | |
781 | case PROCESSOR_INTEL_PENTIUM: | |
782 | arch = "i386"; | |
783 | break; | |
784 | #endif | |
785 | ||
786 | #ifdef PROCESSOR_INTEL_860 | |
787 | case PROCESSOR_INTEL_860: | |
788 | arch = "i860"; | |
789 | break; | |
790 | #endif | |
791 | ||
792 | #ifdef PROCESSOR_MIPS_R2000 | |
793 | case PROCESSOR_MIPS_R2000: | |
794 | case PROCESSOR_MIPS_R3000: | |
795 | case PROCESSOR_MIPS_R4000: | |
796 | arch = "mips"; | |
797 | break; | |
798 | #endif | |
799 | ||
800 | #ifdef PROCESSOR_ALPHA_21064 | |
801 | case PROCESSOR_ALPHA_21064: | |
802 | arch = "alpha"; | |
803 | break; | |
804 | #endif | |
805 | ||
806 | default: | |
807 | arch = "unknown"; | |
808 | break; | |
f332b293 | 809 | } |
480b0c5b GV |
810 | |
811 | /* Let oem be "*" until we figure out how to decode the OEM field. */ | |
812 | oem = "*"; | |
813 | ||
76b3903d | 814 | os = (GetVersion () & OS_WIN95) ? "windows95" : "nt"; |
480b0c5b GV |
815 | |
816 | sprintf (configuration_buffer, "%s-%s-%s%d.%d", arch, oem, os, | |
fbd6baed | 817 | get_w32_major_version (), get_w32_minor_version ()); |
480b0c5b | 818 | return configuration_buffer; |
f332b293 GV |
819 | } |
820 | ||
35f0d482 KH |
821 | #include <sys/timeb.h> |
822 | ||
823 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ | |
824 | void | |
825 | gettimeofday (struct timeval *tv, struct timezone *tz) | |
826 | { | |
827 | struct _timeb tb; | |
828 | _ftime (&tb); | |
829 | ||
830 | tv->tv_sec = tb.time; | |
831 | tv->tv_usec = tb.millitm * 1000L; | |
832 | if (tz) | |
833 | { | |
834 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ | |
835 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ | |
836 | } | |
837 | } | |
35f0d482 | 838 | |
480b0c5b | 839 | /* ------------------------------------------------------------------------- */ |
fbd6baed | 840 | /* IO support and wrapper functions for W32 API. */ |
480b0c5b | 841 | /* ------------------------------------------------------------------------- */ |
95ed0025 | 842 | |
480b0c5b GV |
843 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
844 | on network directories, so we handle that case here. | |
845 | (Ulrich Leodolter, 1/11/95). */ | |
846 | char * | |
847 | sys_ctime (const time_t *t) | |
848 | { | |
849 | char *str = (char *) ctime (t); | |
850 | return (str ? str : "Sun Jan 01 00:00:00 1970"); | |
851 | } | |
852 | ||
853 | /* Emulate sleep...we could have done this with a define, but that | |
854 | would necessitate including windows.h in the files that used it. | |
855 | This is much easier. */ | |
856 | void | |
857 | sys_sleep (int seconds) | |
858 | { | |
859 | Sleep (seconds * 1000); | |
860 | } | |
861 | ||
76b3903d | 862 | /* Internal MSVC functions for low-level descriptor munging */ |
480b0c5b GV |
863 | extern int __cdecl _set_osfhnd (int fd, long h); |
864 | extern int __cdecl _free_osfhnd (int fd); | |
865 | ||
866 | /* parallel array of private info on file handles */ | |
867 | filedesc fd_info [ MAXDESC ]; | |
868 | ||
76b3903d GV |
869 | typedef struct volume_info_data { |
870 | struct volume_info_data * next; | |
871 | ||
872 | /* time when info was obtained */ | |
873 | DWORD timestamp; | |
874 | ||
875 | /* actual volume info */ | |
876 | char * root_dir; | |
480b0c5b GV |
877 | DWORD serialnum; |
878 | DWORD maxcomp; | |
879 | DWORD flags; | |
76b3903d GV |
880 | char * name; |
881 | char * type; | |
882 | } volume_info_data; | |
883 | ||
884 | /* Global referenced by various functions. */ | |
885 | static volume_info_data volume_info; | |
886 | ||
887 | /* Vector to indicate which drives are local and fixed (for which cached | |
888 | data never expires). */ | |
889 | static BOOL fixed_drives[26]; | |
890 | ||
891 | /* Consider cached volume information to be stale if older than 10s, | |
892 | at least for non-local drives. Info for fixed drives is never stale. */ | |
893 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) | |
894 | #define VOLINFO_STILL_VALID( root_dir, info ) \ | |
895 | ( ( isalpha (root_dir[0]) && \ | |
896 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ | |
897 | || GetTickCount () - info->timestamp < 10000 ) | |
898 | ||
899 | /* Cache support functions. */ | |
900 | ||
901 | /* Simple linked list with linear search is sufficient. */ | |
902 | static volume_info_data *volume_cache = NULL; | |
903 | ||
904 | static volume_info_data * | |
905 | lookup_volume_info (char * root_dir) | |
906 | { | |
907 | volume_info_data * info; | |
908 | ||
909 | for (info = volume_cache; info; info = info->next) | |
910 | if (stricmp (info->root_dir, root_dir) == 0) | |
911 | break; | |
912 | return info; | |
913 | } | |
914 | ||
915 | static void | |
916 | add_volume_info (char * root_dir, volume_info_data * info) | |
917 | { | |
918 | info->root_dir = strdup (root_dir); | |
919 | info->next = volume_cache; | |
920 | volume_cache = info; | |
921 | } | |
922 | ||
923 | ||
924 | /* Wrapper for GetVolumeInformation, which uses caching to avoid | |
925 | performance penalty (~2ms on 486 for local drives, 7.5ms for local | |
926 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ | |
927 | volume_info_data * | |
928 | GetCachedVolumeInformation (char * root_dir) | |
929 | { | |
930 | volume_info_data * info; | |
931 | char default_root[ MAX_PATH ]; | |
932 | ||
933 | /* NULL for root_dir means use root from current directory. */ | |
934 | if (root_dir == NULL) | |
935 | { | |
936 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) | |
937 | return NULL; | |
938 | parse_root (default_root, &root_dir); | |
939 | *root_dir = 0; | |
940 | root_dir = default_root; | |
941 | } | |
942 | ||
943 | /* Local fixed drives can be cached permanently. Removable drives | |
944 | cannot be cached permanently, since the volume name and serial | |
945 | number (if nothing else) can change. Remote drives should be | |
946 | treated as if they are removable, since there is no sure way to | |
947 | tell whether they are or not. Also, the UNC association of drive | |
948 | letters mapped to remote volumes can be changed at any time (even | |
949 | by other processes) without notice. | |
950 | ||
951 | As a compromise, so we can benefit from caching info for remote | |
952 | volumes, we use a simple expiry mechanism to invalidate cache | |
953 | entries that are more than ten seconds old. */ | |
954 | ||
955 | #if 0 | |
956 | /* No point doing this, because WNetGetConnection is even slower than | |
957 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, | |
958 | GetDriveType is about the only call of this type which does not | |
959 | involve network access, and so is extremely quick). */ | |
960 | ||
961 | /* Map drive letter to UNC if remote. */ | |
962 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) | |
963 | { | |
964 | char remote_name[ 256 ]; | |
965 | char drive[3] = { root_dir[0], ':' }; | |
966 | ||
967 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) | |
968 | == NO_ERROR) | |
969 | /* do something */ ; | |
970 | } | |
971 | #endif | |
972 | ||
973 | info = lookup_volume_info (root_dir); | |
974 | ||
975 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) | |
976 | { | |
977 | char name[ 256 ]; | |
978 | DWORD serialnum; | |
979 | DWORD maxcomp; | |
980 | DWORD flags; | |
981 | char type[ 256 ]; | |
982 | ||
983 | /* Info is not cached, or is stale. */ | |
984 | if (!GetVolumeInformation (root_dir, | |
985 | name, sizeof (name), | |
986 | &serialnum, | |
987 | &maxcomp, | |
988 | &flags, | |
989 | type, sizeof (type))) | |
990 | return NULL; | |
991 | ||
992 | /* Cache the volume information for future use, overwriting existing | |
993 | entry if present. */ | |
994 | if (info == NULL) | |
995 | { | |
996 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); | |
997 | add_volume_info (root_dir, info); | |
998 | } | |
999 | else | |
1000 | { | |
1001 | free (info->name); | |
1002 | free (info->type); | |
1003 | } | |
1004 | ||
1005 | info->name = strdup (name); | |
1006 | info->serialnum = serialnum; | |
1007 | info->maxcomp = maxcomp; | |
1008 | info->flags = flags; | |
1009 | info->type = strdup (type); | |
1010 | info->timestamp = GetTickCount (); | |
1011 | } | |
1012 | ||
1013 | return info; | |
1014 | } | |
480b0c5b GV |
1015 | |
1016 | /* Get information on the volume where name is held; set path pointer to | |
1017 | start of pathname in name (past UNC header\volume header if present). */ | |
1018 | int | |
1019 | get_volume_info (const char * name, const char ** pPath) | |
95ed0025 | 1020 | { |
480b0c5b GV |
1021 | char temp[MAX_PATH]; |
1022 | char *rootname = NULL; /* default to current volume */ | |
76b3903d | 1023 | volume_info_data * info; |
480b0c5b GV |
1024 | |
1025 | if (name == NULL) | |
1026 | return FALSE; | |
1027 | ||
1028 | /* find the root name of the volume if given */ | |
1029 | if (isalpha (name[0]) && name[1] == ':') | |
1030 | { | |
1031 | rootname = temp; | |
1032 | temp[0] = *name++; | |
1033 | temp[1] = *name++; | |
1034 | temp[2] = '\\'; | |
1035 | temp[3] = 0; | |
1036 | } | |
1037 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
95ed0025 | 1038 | { |
480b0c5b GV |
1039 | char *str = temp; |
1040 | int slashes = 4; | |
1041 | rootname = temp; | |
1042 | do | |
1043 | { | |
1044 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
1045 | break; | |
1046 | *str++ = *name++; | |
1047 | } | |
1048 | while ( *name ); | |
1049 | ||
480b0c5b GV |
1050 | *str++ = '\\'; |
1051 | *str = 0; | |
95ed0025 | 1052 | } |
480b0c5b GV |
1053 | |
1054 | if (pPath) | |
1055 | *pPath = name; | |
1056 | ||
76b3903d GV |
1057 | info = GetCachedVolumeInformation (rootname); |
1058 | if (info != NULL) | |
95ed0025 | 1059 | { |
76b3903d GV |
1060 | /* Set global referenced by other functions. */ |
1061 | volume_info = *info; | |
480b0c5b | 1062 | return TRUE; |
95ed0025 | 1063 | } |
480b0c5b GV |
1064 | return FALSE; |
1065 | } | |
1066 | ||
1067 | /* Determine if volume is FAT format (ie. only supports short 8.3 | |
1068 | names); also set path pointer to start of pathname in name. */ | |
1069 | int | |
1070 | is_fat_volume (const char * name, const char ** pPath) | |
1071 | { | |
1072 | if (get_volume_info (name, pPath)) | |
1073 | return (volume_info.maxcomp == 12); | |
1074 | return FALSE; | |
1075 | } | |
1076 | ||
1077 | /* Map filename to a legal 8.3 name if necessary. */ | |
1078 | const char * | |
fbd6baed | 1079 | map_w32_filename (const char * name, const char ** pPath) |
480b0c5b GV |
1080 | { |
1081 | static char shortname[MAX_PATH]; | |
1082 | char * str = shortname; | |
1083 | char c; | |
480b0c5b | 1084 | char * path; |
76b3903d | 1085 | const char * save_name = name; |
480b0c5b GV |
1086 | |
1087 | if (is_fat_volume (name, &path)) /* truncate to 8.3 */ | |
95ed0025 | 1088 | { |
480b0c5b GV |
1089 | register int left = 8; /* maximum number of chars in part */ |
1090 | register int extn = 0; /* extension added? */ | |
1091 | register int dots = 2; /* maximum number of dots allowed */ | |
1092 | ||
1093 | while (name < path) | |
1094 | *str++ = *name++; /* skip past UNC header */ | |
1095 | ||
1096 | while ((c = *name++)) | |
1097 | { | |
1098 | switch ( c ) | |
1099 | { | |
1100 | case '\\': | |
1101 | case '/': | |
1102 | *str++ = '\\'; | |
1103 | extn = 0; /* reset extension flags */ | |
1104 | dots = 2; /* max 2 dots */ | |
1105 | left = 8; /* max length 8 for main part */ | |
1106 | break; | |
1107 | case ':': | |
1108 | *str++ = ':'; | |
1109 | extn = 0; /* reset extension flags */ | |
1110 | dots = 2; /* max 2 dots */ | |
1111 | left = 8; /* max length 8 for main part */ | |
1112 | break; | |
1113 | case '.': | |
1114 | if ( dots ) | |
1115 | { | |
1116 | /* Convert path components of the form .xxx to _xxx, | |
1117 | but leave . and .. as they are. This allows .emacs | |
1118 | to be read as _emacs, for example. */ | |
1119 | ||
1120 | if (! *name || | |
1121 | *name == '.' || | |
1122 | IS_DIRECTORY_SEP (*name)) | |
1123 | { | |
1124 | *str++ = '.'; | |
1125 | dots--; | |
1126 | } | |
1127 | else | |
1128 | { | |
1129 | *str++ = '_'; | |
1130 | left--; | |
1131 | dots = 0; | |
1132 | } | |
1133 | } | |
1134 | else if ( !extn ) | |
1135 | { | |
1136 | *str++ = '.'; | |
1137 | extn = 1; /* we've got an extension */ | |
1138 | left = 3; /* 3 chars in extension */ | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | /* any embedded dots after the first are converted to _ */ | |
1143 | *str++ = '_'; | |
1144 | } | |
1145 | break; | |
1146 | case '~': | |
1147 | case '#': /* don't lose these, they're important */ | |
1148 | if ( ! left ) | |
1149 | str[-1] = c; /* replace last character of part */ | |
1150 | /* FALLTHRU */ | |
1151 | default: | |
1152 | if ( left ) | |
1153 | { | |
1154 | *str++ = tolower (c); /* map to lower case (looks nicer) */ | |
1155 | left--; | |
1156 | dots = 0; /* started a path component */ | |
1157 | } | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | *str = '\0'; | |
fc85cb29 RS |
1162 | } |
1163 | else | |
1164 | { | |
1165 | strcpy (shortname, name); | |
1166 | unixtodos_filename (shortname); | |
95ed0025 | 1167 | } |
480b0c5b GV |
1168 | |
1169 | if (pPath) | |
76b3903d | 1170 | *pPath = shortname + (path - save_name); |
480b0c5b | 1171 | |
fc85cb29 | 1172 | return shortname; |
480b0c5b GV |
1173 | } |
1174 | ||
b3308d2e KH |
1175 | static int |
1176 | is_exec (const char * name) | |
1177 | { | |
1178 | char * p = strrchr (name, '.'); | |
1179 | return | |
1180 | (p != NULL | |
1181 | && (stricmp (p, ".exe") == 0 || | |
1182 | stricmp (p, ".com") == 0 || | |
1183 | stricmp (p, ".bat") == 0 || | |
1184 | stricmp (p, ".cmd") == 0)); | |
1185 | } | |
1186 | ||
76b3903d GV |
1187 | /* Emulate the Unix directory procedures opendir, closedir, |
1188 | and readdir. We can't use the procedures supplied in sysdep.c, | |
1189 | so we provide them here. */ | |
1190 | ||
1191 | struct direct dir_static; /* simulated directory contents */ | |
1192 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; | |
1193 | static int dir_is_fat; | |
1194 | static char dir_pathname[MAXPATHLEN+1]; | |
1195 | static WIN32_FIND_DATA dir_find_data; | |
1196 | ||
1197 | DIR * | |
1198 | opendir (char *filename) | |
1199 | { | |
1200 | DIR *dirp; | |
1201 | ||
1202 | /* Opening is done by FindFirstFile. However, a read is inherent to | |
1203 | this operation, so we defer the open until read time. */ | |
1204 | ||
1205 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) | |
1206 | return NULL; | |
1207 | if (dir_find_handle != INVALID_HANDLE_VALUE) | |
1208 | return NULL; | |
1209 | ||
1210 | dirp->dd_fd = 0; | |
1211 | dirp->dd_loc = 0; | |
1212 | dirp->dd_size = 0; | |
1213 | ||
1214 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); | |
1215 | dir_pathname[MAXPATHLEN] = '\0'; | |
1216 | dir_is_fat = is_fat_volume (filename, NULL); | |
1217 | ||
1218 | return dirp; | |
1219 | } | |
1220 | ||
1221 | void | |
1222 | closedir (DIR *dirp) | |
1223 | { | |
1224 | /* If we have a find-handle open, close it. */ | |
1225 | if (dir_find_handle != INVALID_HANDLE_VALUE) | |
1226 | { | |
1227 | FindClose (dir_find_handle); | |
1228 | dir_find_handle = INVALID_HANDLE_VALUE; | |
1229 | } | |
1230 | xfree ((char *) dirp); | |
1231 | } | |
1232 | ||
1233 | struct direct * | |
1234 | readdir (DIR *dirp) | |
1235 | { | |
1236 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ | |
1237 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
1238 | { | |
1239 | char filename[MAXNAMLEN + 3]; | |
1240 | int ln; | |
1241 | ||
1242 | strcpy (filename, dir_pathname); | |
1243 | ln = strlen (filename) - 1; | |
1244 | if (!IS_DIRECTORY_SEP (filename[ln])) | |
1245 | strcat (filename, "\\"); | |
1246 | strcat (filename, "*"); | |
1247 | ||
1248 | dir_find_handle = FindFirstFile (filename, &dir_find_data); | |
1249 | ||
1250 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
1251 | return NULL; | |
1252 | } | |
1253 | else | |
1254 | { | |
1255 | if (!FindNextFile (dir_find_handle, &dir_find_data)) | |
1256 | return NULL; | |
1257 | } | |
1258 | ||
1259 | /* Emacs never uses this value, so don't bother making it match | |
1260 | value returned by stat(). */ | |
1261 | dir_static.d_ino = 1; | |
1262 | ||
1263 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + | |
1264 | dir_static.d_namlen - dir_static.d_namlen % 4; | |
1265 | ||
1266 | dir_static.d_namlen = strlen (dir_find_data.cFileName); | |
1267 | strcpy (dir_static.d_name, dir_find_data.cFileName); | |
1268 | if (dir_is_fat) | |
1269 | _strlwr (dir_static.d_name); | |
1270 | else if (!NILP (Vw32_downcase_file_names)) | |
1271 | { | |
1272 | register char *p; | |
1273 | for (p = dir_static.d_name; *p; p++) | |
1274 | if (*p >= 'a' && *p <= 'z') | |
1275 | break; | |
1276 | if (!*p) | |
1277 | _strlwr (dir_static.d_name); | |
1278 | } | |
1279 | ||
1280 | return &dir_static; | |
1281 | } | |
1282 | ||
480b0c5b GV |
1283 | |
1284 | /* Shadow some MSVC runtime functions to map requests for long filenames | |
1285 | to reasonable short names if necessary. This was originally added to | |
1286 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support | |
1287 | long file names. */ | |
1288 | ||
1289 | int | |
1290 | sys_access (const char * path, int mode) | |
1291 | { | |
b3308d2e KH |
1292 | DWORD attributes; |
1293 | ||
1294 | /* MSVC implementation doesn't recognize D_OK. */ | |
1295 | path = map_w32_filename (path, NULL); | |
1296 | if ((attributes = GetFileAttributes (path)) == -1) | |
1297 | { | |
1298 | /* Should try mapping GetLastError to errno; for now just indicate | |
1299 | that path doesn't exist. */ | |
1300 | errno = EACCES; | |
1301 | return -1; | |
1302 | } | |
1303 | if ((mode & X_OK) != 0 && !is_exec (path)) | |
1304 | { | |
1305 | errno = EACCES; | |
1306 | return -1; | |
1307 | } | |
1308 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) | |
1309 | { | |
1310 | errno = EACCES; | |
1311 | return -1; | |
1312 | } | |
1313 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) | |
1314 | { | |
1315 | errno = EACCES; | |
1316 | return -1; | |
1317 | } | |
1318 | return 0; | |
480b0c5b GV |
1319 | } |
1320 | ||
1321 | int | |
1322 | sys_chdir (const char * path) | |
1323 | { | |
fbd6baed | 1324 | return _chdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1325 | } |
1326 | ||
1327 | int | |
1328 | sys_chmod (const char * path, int mode) | |
1329 | { | |
fbd6baed | 1330 | return _chmod (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1331 | } |
1332 | ||
1333 | int | |
1334 | sys_creat (const char * path, int mode) | |
1335 | { | |
fbd6baed | 1336 | return _creat (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1337 | } |
1338 | ||
1339 | FILE * | |
1340 | sys_fopen(const char * path, const char * mode) | |
1341 | { | |
1342 | int fd; | |
1343 | int oflag; | |
1344 | const char * mode_save = mode; | |
1345 | ||
1346 | /* Force all file handles to be non-inheritable. This is necessary to | |
1347 | ensure child processes don't unwittingly inherit handles that might | |
1348 | prevent future file access. */ | |
1349 | ||
1350 | if (mode[0] == 'r') | |
1351 | oflag = O_RDONLY; | |
1352 | else if (mode[0] == 'w' || mode[0] == 'a') | |
1353 | oflag = O_WRONLY | O_CREAT | O_TRUNC; | |
95ed0025 | 1354 | else |
480b0c5b GV |
1355 | return NULL; |
1356 | ||
1357 | /* Only do simplistic option parsing. */ | |
1358 | while (*++mode) | |
1359 | if (mode[0] == '+') | |
1360 | { | |
1361 | oflag &= ~(O_RDONLY | O_WRONLY); | |
1362 | oflag |= O_RDWR; | |
1363 | } | |
1364 | else if (mode[0] == 'b') | |
1365 | { | |
1366 | oflag &= ~O_TEXT; | |
1367 | oflag |= O_BINARY; | |
1368 | } | |
1369 | else if (mode[0] == 't') | |
1370 | { | |
1371 | oflag &= ~O_BINARY; | |
1372 | oflag |= O_TEXT; | |
1373 | } | |
1374 | else break; | |
1375 | ||
fbd6baed | 1376 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
480b0c5b GV |
1377 | if (fd < 0) |
1378 | return NULL; | |
1379 | ||
76b3903d | 1380 | return _fdopen (fd, mode_save); |
95ed0025 | 1381 | } |
480b0c5b | 1382 | |
76b3903d | 1383 | /* This only works on NTFS volumes, but is useful to have. */ |
480b0c5b | 1384 | int |
76b3903d | 1385 | sys_link (const char * old, const char * new) |
480b0c5b | 1386 | { |
76b3903d GV |
1387 | HANDLE fileh; |
1388 | int result = -1; | |
1389 | char oldname[MAX_PATH], newname[MAX_PATH]; | |
1390 | ||
1391 | if (old == NULL || new == NULL) | |
1392 | { | |
1393 | errno = ENOENT; | |
1394 | return -1; | |
1395 | } | |
1396 | ||
1397 | strcpy (oldname, map_w32_filename (old, NULL)); | |
1398 | strcpy (newname, map_w32_filename (new, NULL)); | |
1399 | ||
1400 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, | |
1401 | FILE_FLAG_BACKUP_SEMANTICS, NULL); | |
1402 | if (fileh != INVALID_HANDLE_VALUE) | |
1403 | { | |
1404 | int wlen; | |
1405 | ||
1406 | /* Confusingly, the "alternate" stream name field does not apply | |
1407 | when restoring a hard link, and instead contains the actual | |
1408 | stream data for the link (ie. the name of the link to create). | |
1409 | The WIN32_STREAM_ID structure before the cStreamName field is | |
1410 | the stream header, which is then immediately followed by the | |
1411 | stream data. */ | |
1412 | ||
1413 | struct { | |
1414 | WIN32_STREAM_ID wid; | |
1415 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ | |
1416 | } data; | |
1417 | ||
1418 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, | |
1419 | data.wid.cStreamName, MAX_PATH); | |
1420 | if (wlen > 0) | |
1421 | { | |
1422 | LPVOID context = NULL; | |
1423 | DWORD wbytes = 0; | |
1424 | ||
1425 | data.wid.dwStreamId = BACKUP_LINK; | |
1426 | data.wid.dwStreamAttributes = 0; | |
1427 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); | |
1428 | data.wid.Size.HighPart = 0; | |
1429 | data.wid.dwStreamNameSize = 0; | |
1430 | ||
1431 | if (BackupWrite (fileh, (LPBYTE)&data, | |
1432 | offsetof (WIN32_STREAM_ID, cStreamName) | |
1433 | + data.wid.Size.LowPart, | |
1434 | &wbytes, FALSE, FALSE, &context) | |
1435 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) | |
1436 | { | |
1437 | /* succeeded */ | |
1438 | result = 0; | |
1439 | } | |
1440 | else | |
1441 | { | |
1442 | /* Should try mapping GetLastError to errno; for now just | |
1443 | indicate a general error (eg. links not supported). */ | |
1444 | errno = EINVAL; // perhaps EMLINK? | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | CloseHandle (fileh); | |
1449 | } | |
1450 | else | |
1451 | errno = ENOENT; | |
1452 | ||
1453 | return result; | |
480b0c5b GV |
1454 | } |
1455 | ||
1456 | int | |
1457 | sys_mkdir (const char * path) | |
1458 | { | |
fbd6baed | 1459 | return _mkdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1460 | } |
1461 | ||
9d1778b1 RS |
1462 | /* Because of long name mapping issues, we need to implement this |
1463 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate | |
1464 | a unique name, instead of setting the input template to an empty | |
1465 | string. | |
1466 | ||
1467 | Standard algorithm seems to be use pid or tid with a letter on the | |
1468 | front (in place of the 6 X's) and cycle through the letters to find a | |
1469 | unique name. We extend that to allow any reasonable character as the | |
1470 | first of the 6 X's. */ | |
480b0c5b GV |
1471 | char * |
1472 | sys_mktemp (char * template) | |
1473 | { | |
9d1778b1 RS |
1474 | char * p; |
1475 | int i; | |
1476 | unsigned uid = GetCurrentThreadId (); | |
1477 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; | |
1478 | ||
1479 | if (template == NULL) | |
1480 | return NULL; | |
1481 | p = template + strlen (template); | |
1482 | i = 5; | |
1483 | /* replace up to the last 5 X's with uid in decimal */ | |
1484 | while (--p >= template && p[0] == 'X' && --i >= 0) | |
1485 | { | |
1486 | p[0] = '0' + uid % 10; | |
1487 | uid /= 10; | |
1488 | } | |
1489 | ||
1490 | if (i < 0 && p[0] == 'X') | |
1491 | { | |
1492 | i = 0; | |
1493 | do | |
1494 | { | |
1495 | int save_errno = errno; | |
1496 | p[0] = first_char[i]; | |
1497 | if (sys_access (template, 0) < 0) | |
1498 | { | |
1499 | errno = save_errno; | |
1500 | return template; | |
1501 | } | |
1502 | } | |
1503 | while (++i < sizeof (first_char)); | |
1504 | } | |
1505 | ||
1506 | /* Template is badly formed or else we can't generate a unique name, | |
1507 | so return empty string */ | |
1508 | template[0] = 0; | |
1509 | return template; | |
480b0c5b GV |
1510 | } |
1511 | ||
1512 | int | |
1513 | sys_open (const char * path, int oflag, int mode) | |
1514 | { | |
1515 | /* Force all file handles to be non-inheritable. */ | |
fbd6baed | 1516 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
480b0c5b GV |
1517 | } |
1518 | ||
1519 | int | |
1520 | sys_rename (const char * oldname, const char * newname) | |
1521 | { | |
eb9ea53f | 1522 | int result; |
b3308d2e | 1523 | char temp[MAX_PATH]; |
480b0c5b | 1524 | |
e9e23e23 | 1525 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
5162ffce MB |
1526 | alias in a number of circumstances (it is not easy to predict when |
1527 | just by looking at oldname and newname, unfortunately). In these | |
1528 | cases, renaming through a temporary name avoids the problem. | |
1529 | ||
e9e23e23 | 1530 | A second problem on Windows 95 is that renaming through a temp name when |
5162ffce MB |
1531 | newname is uppercase fails (the final long name ends up in |
1532 | lowercase, although the short alias might be uppercase) UNLESS the | |
1533 | long temp name is not 8.3. | |
1534 | ||
e9e23e23 | 1535 | So, on Windows 95 we always rename through a temp name, and we make sure |
5162ffce | 1536 | the temp name has a long extension to ensure correct renaming. */ |
480b0c5b | 1537 | |
fbd6baed | 1538 | strcpy (temp, map_w32_filename (oldname, NULL)); |
480b0c5b | 1539 | |
76b3903d | 1540 | if (os_subtype == OS_WIN95) |
480b0c5b | 1541 | { |
b3308d2e | 1542 | char * o; |
480b0c5b | 1543 | char * p; |
b3308d2e KH |
1544 | int i = 0; |
1545 | ||
1546 | oldname = map_w32_filename (oldname, NULL); | |
1547 | if (o = strrchr (oldname, '\\')) | |
1548 | o++; | |
1549 | else | |
1550 | o = (char *) oldname; | |
480b0c5b | 1551 | |
480b0c5b GV |
1552 | if (p = strrchr (temp, '\\')) |
1553 | p++; | |
1554 | else | |
1555 | p = temp; | |
b3308d2e KH |
1556 | |
1557 | do | |
1558 | { | |
1559 | /* Force temp name to require a manufactured 8.3 alias - this | |
1560 | seems to make the second rename work properly. */ | |
f313ee82 | 1561 | sprintf (p, "_.%s.%u", o, i); |
b3308d2e | 1562 | i++; |
58f0cb7e | 1563 | result = rename (oldname, temp); |
b3308d2e KH |
1564 | } |
1565 | /* This loop must surely terminate! */ | |
f313ee82 | 1566 | while (result < 0 && (errno == EEXIST || errno == EACCES)); |
58f0cb7e | 1567 | if (result < 0) |
480b0c5b GV |
1568 | return -1; |
1569 | } | |
1570 | ||
1571 | /* Emulate Unix behaviour - newname is deleted if it already exists | |
5162ffce | 1572 | (at least if it is a file; don't do this for directories). |
76b3903d | 1573 | |
b3308d2e KH |
1574 | Since we mustn't do this if we are just changing the case of the |
1575 | file name (we would end up deleting the file we are trying to | |
1576 | rename!), we let rename detect if the destination file already | |
1577 | exists - that way we avoid the possible pitfalls of trying to | |
1578 | determine ourselves whether two names really refer to the same | |
1579 | file, which is not always possible in the general case. (Consider | |
1580 | all the permutations of shared or subst'd drives, etc.) */ | |
1581 | ||
1582 | newname = map_w32_filename (newname, NULL); | |
eb9ea53f | 1583 | result = rename (temp, newname); |
b3308d2e KH |
1584 | |
1585 | if (result < 0 | |
f313ee82 | 1586 | && (errno == EEXIST || errno == EACCES) |
b3308d2e KH |
1587 | && _chmod (newname, 0666) == 0 |
1588 | && _unlink (newname) == 0) | |
1589 | result = rename (temp, newname); | |
480b0c5b | 1590 | |
eb9ea53f | 1591 | return result; |
480b0c5b GV |
1592 | } |
1593 | ||
1594 | int | |
1595 | sys_rmdir (const char * path) | |
1596 | { | |
fbd6baed | 1597 | return _rmdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1598 | } |
1599 | ||
1600 | int | |
1601 | sys_unlink (const char * path) | |
1602 | { | |
16bb7578 GV |
1603 | path = map_w32_filename (path, NULL); |
1604 | ||
1605 | /* On Unix, unlink works without write permission. */ | |
1606 | _chmod (path, 0666); | |
1607 | return _unlink (path); | |
480b0c5b GV |
1608 | } |
1609 | ||
1610 | static FILETIME utc_base_ft; | |
1611 | static long double utc_base; | |
1612 | static int init = 0; | |
1613 | ||
1614 | static time_t | |
1615 | convert_time (FILETIME ft) | |
1616 | { | |
1617 | long double ret; | |
1618 | ||
1619 | if (!init) | |
1620 | { | |
1621 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1622 | SYSTEMTIME st; | |
1623 | ||
1624 | st.wYear = 1970; | |
1625 | st.wMonth = 1; | |
1626 | st.wDay = 1; | |
1627 | st.wHour = 0; | |
1628 | st.wMinute = 0; | |
1629 | st.wSecond = 0; | |
1630 | st.wMilliseconds = 0; | |
1631 | ||
1632 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1633 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1634 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1635 | init = 1; | |
1636 | } | |
1637 | ||
1638 | if (CompareFileTime (&ft, &utc_base_ft) < 0) | |
1639 | return 0; | |
1640 | ||
1641 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; | |
1642 | ret -= utc_base; | |
1643 | return (time_t) (ret * 1e-7); | |
1644 | } | |
1645 | ||
480b0c5b GV |
1646 | void |
1647 | convert_from_time_t (time_t time, FILETIME * pft) | |
1648 | { | |
1649 | long double tmp; | |
1650 | ||
1651 | if (!init) | |
1652 | { | |
1653 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1654 | SYSTEMTIME st; | |
1655 | ||
1656 | st.wYear = 1970; | |
1657 | st.wMonth = 1; | |
1658 | st.wDay = 1; | |
1659 | st.wHour = 0; | |
1660 | st.wMinute = 0; | |
1661 | st.wSecond = 0; | |
1662 | st.wMilliseconds = 0; | |
1663 | ||
1664 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1665 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1666 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1667 | init = 1; | |
1668 | } | |
1669 | ||
1670 | /* time in 100ns units since 1-Jan-1601 */ | |
1671 | tmp = (long double) time * 1e7 + utc_base; | |
1672 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); | |
16bb7578 | 1673 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
480b0c5b | 1674 | } |
480b0c5b | 1675 | |
76b3903d GV |
1676 | #if 0 |
1677 | /* No reason to keep this; faking inode values either by hashing or even | |
1678 | using the file index from GetInformationByHandle, is not perfect and | |
1679 | so by default Emacs doesn't use the inode values on Windows. | |
1680 | Instead, we now determine file-truename correctly (except for | |
1681 | possible drive aliasing etc). */ | |
1682 | ||
1683 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ | |
480b0c5b | 1684 | static unsigned |
76b3903d | 1685 | hashval (const unsigned char * str) |
480b0c5b GV |
1686 | { |
1687 | unsigned h = 0; | |
480b0c5b GV |
1688 | while (*str) |
1689 | { | |
1690 | h = (h << 4) + *str++; | |
76b3903d | 1691 | h ^= (h >> 28); |
480b0c5b GV |
1692 | } |
1693 | return h; | |
1694 | } | |
1695 | ||
1696 | /* Return the hash value of the canonical pathname, excluding the | |
1697 | drive/UNC header, to get a hopefully unique inode number. */ | |
76b3903d | 1698 | static DWORD |
480b0c5b GV |
1699 | generate_inode_val (const char * name) |
1700 | { | |
1701 | char fullname[ MAX_PATH ]; | |
1702 | char * p; | |
1703 | unsigned hash; | |
1704 | ||
76b3903d GV |
1705 | /* Get the truly canonical filename, if it exists. (Note: this |
1706 | doesn't resolve aliasing due to subst commands, or recognise hard | |
1707 | links. */ | |
1708 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) | |
1709 | abort (); | |
1710 | ||
1711 | parse_root (fullname, &p); | |
fbd6baed | 1712 | /* Normal W32 filesystems are still case insensitive. */ |
480b0c5b | 1713 | _strlwr (p); |
76b3903d | 1714 | return hashval (p); |
480b0c5b GV |
1715 | } |
1716 | ||
76b3903d GV |
1717 | #endif |
1718 | ||
480b0c5b GV |
1719 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
1720 | replace it with our own. This also allows us to calculate consistent | |
1721 | inode values without hacks in the main Emacs code. */ | |
1722 | int | |
1723 | stat (const char * path, struct stat * buf) | |
1724 | { | |
eb9ea53f | 1725 | char *name, *r; |
480b0c5b GV |
1726 | WIN32_FIND_DATA wfd; |
1727 | HANDLE fh; | |
76b3903d | 1728 | DWORD fake_inode; |
480b0c5b GV |
1729 | int permission; |
1730 | int len; | |
1731 | int rootdir = FALSE; | |
1732 | ||
1733 | if (path == NULL || buf == NULL) | |
1734 | { | |
1735 | errno = EFAULT; | |
1736 | return -1; | |
1737 | } | |
1738 | ||
fbd6baed | 1739 | name = (char *) map_w32_filename (path, &path); |
bb1584c8 RS |
1740 | /* must be valid filename, no wild cards or other illegal characters */ |
1741 | if (strpbrk (name, "*?|<>\"")) | |
480b0c5b GV |
1742 | { |
1743 | errno = ENOENT; | |
1744 | return -1; | |
1745 | } | |
1746 | ||
eb9ea53f GV |
1747 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
1748 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; | |
1749 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') | |
1750 | { | |
1751 | r[1] = r[2] = '\0'; | |
1752 | } | |
1753 | ||
480b0c5b GV |
1754 | /* Remove trailing directory separator, unless name is the root |
1755 | directory of a drive or UNC volume in which case ensure there | |
1756 | is a trailing separator. */ | |
1757 | len = strlen (name); | |
1758 | rootdir = (path >= name + len - 1 | |
1759 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); | |
1760 | name = strcpy (alloca (len + 2), name); | |
1761 | ||
1762 | if (rootdir) | |
1763 | { | |
1764 | if (!IS_DIRECTORY_SEP (name[len-1])) | |
1765 | strcat (name, "\\"); | |
1766 | if (GetDriveType (name) < 2) | |
1767 | { | |
1768 | errno = ENOENT; | |
1769 | return -1; | |
1770 | } | |
1771 | memset (&wfd, 0, sizeof (wfd)); | |
1772 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; | |
1773 | wfd.ftCreationTime = utc_base_ft; | |
1774 | wfd.ftLastAccessTime = utc_base_ft; | |
1775 | wfd.ftLastWriteTime = utc_base_ft; | |
1776 | strcpy (wfd.cFileName, name); | |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | if (IS_DIRECTORY_SEP (name[len-1])) | |
1781 | name[len - 1] = 0; | |
76b3903d GV |
1782 | |
1783 | /* (This is hacky, but helps when doing file completions on | |
1784 | network drives.) Optimize by using information available from | |
1785 | active readdir if possible. */ | |
1786 | if (dir_find_handle != INVALID_HANDLE_VALUE | |
1787 | && (len = strlen (dir_pathname)), | |
1788 | strnicmp (name, dir_pathname, len) == 0 | |
1789 | && IS_DIRECTORY_SEP (name[len]) | |
1790 | && stricmp (name + len + 1, dir_static.d_name) == 0) | |
480b0c5b | 1791 | { |
76b3903d GV |
1792 | /* This was the last entry returned by readdir. */ |
1793 | wfd = dir_find_data; | |
1794 | } | |
1795 | else | |
1796 | { | |
1797 | fh = FindFirstFile (name, &wfd); | |
1798 | if (fh == INVALID_HANDLE_VALUE) | |
1799 | { | |
1800 | errno = ENOENT; | |
1801 | return -1; | |
1802 | } | |
1803 | FindClose (fh); | |
480b0c5b | 1804 | } |
480b0c5b GV |
1805 | } |
1806 | ||
1807 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1808 | { | |
1809 | buf->st_mode = _S_IFDIR; | |
1810 | buf->st_nlink = 2; /* doesn't really matter */ | |
76b3903d | 1811 | fake_inode = 0; /* this doesn't either I think */ |
480b0c5b | 1812 | } |
76b3903d | 1813 | else if (!NILP (Vw32_get_true_file_attributes)) |
480b0c5b | 1814 | { |
480b0c5b GV |
1815 | /* This is more accurate in terms of gettting the correct number |
1816 | of links, but is quite slow (it is noticable when Emacs is | |
1817 | making a list of file name completions). */ | |
1818 | BY_HANDLE_FILE_INFORMATION info; | |
1819 | ||
76b3903d GV |
1820 | /* No access rights required to get info. */ |
1821 | fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL); | |
480b0c5b GV |
1822 | |
1823 | if (GetFileInformationByHandle (fh, &info)) | |
1824 | { | |
1825 | switch (GetFileType (fh)) | |
1826 | { | |
1827 | case FILE_TYPE_DISK: | |
1828 | buf->st_mode = _S_IFREG; | |
1829 | break; | |
1830 | case FILE_TYPE_PIPE: | |
1831 | buf->st_mode = _S_IFIFO; | |
1832 | break; | |
1833 | case FILE_TYPE_CHAR: | |
1834 | case FILE_TYPE_UNKNOWN: | |
1835 | default: | |
1836 | buf->st_mode = _S_IFCHR; | |
1837 | } | |
1838 | buf->st_nlink = info.nNumberOfLinks; | |
76b3903d GV |
1839 | /* Might as well use file index to fake inode values, but this |
1840 | is not guaranteed to be unique unless we keep a handle open | |
1841 | all the time (even then there are situations where it is | |
1842 | not unique). Reputedly, there are at most 48 bits of info | |
1843 | (on NTFS, presumably less on FAT). */ | |
1844 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
480b0c5b GV |
1845 | CloseHandle (fh); |
1846 | } | |
1847 | else | |
1848 | { | |
1849 | errno = EACCES; | |
1850 | return -1; | |
1851 | } | |
76b3903d GV |
1852 | } |
1853 | else | |
1854 | { | |
1855 | /* Don't bother to make this information more accurate. */ | |
480b0c5b GV |
1856 | buf->st_mode = _S_IFREG; |
1857 | buf->st_nlink = 1; | |
76b3903d GV |
1858 | fake_inode = 0; |
1859 | } | |
1860 | ||
1861 | #if 0 | |
1862 | /* Not sure if there is any point in this. */ | |
1863 | if (!NILP (Vw32_generate_fake_inodes)) | |
1864 | fake_inode = generate_inode_val (name); | |
1865 | else if (fake_inode == 0) | |
1866 | { | |
1867 | /* For want of something better, try to make everything unique. */ | |
1868 | static DWORD gen_num = 0; | |
1869 | fake_inode = ++gen_num; | |
480b0c5b | 1870 | } |
76b3903d GV |
1871 | #endif |
1872 | ||
1873 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
1874 | if (sizeof (buf->st_ino) == 2) | |
1875 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
1876 | else | |
1877 | buf->st_ino = fake_inode; | |
480b0c5b GV |
1878 | |
1879 | /* consider files to belong to current user */ | |
1880 | buf->st_uid = the_passwd.pw_uid; | |
1881 | buf->st_gid = the_passwd.pw_gid; | |
1882 | ||
fbd6baed | 1883 | /* volume_info is set indirectly by map_w32_filename */ |
480b0c5b GV |
1884 | buf->st_dev = volume_info.serialnum; |
1885 | buf->st_rdev = volume_info.serialnum; | |
1886 | ||
480b0c5b GV |
1887 | |
1888 | buf->st_size = wfd.nFileSizeLow; | |
1889 | ||
1890 | /* Convert timestamps to Unix format. */ | |
1891 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); | |
1892 | buf->st_atime = convert_time (wfd.ftLastAccessTime); | |
1893 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
1894 | buf->st_ctime = convert_time (wfd.ftCreationTime); | |
1895 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
1896 | ||
1897 | /* determine rwx permissions */ | |
1898 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
1899 | permission = _S_IREAD; | |
1900 | else | |
1901 | permission = _S_IREAD | _S_IWRITE; | |
1902 | ||
1903 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1904 | permission |= _S_IEXEC; | |
b3308d2e KH |
1905 | else if (is_exec (name)) |
1906 | permission |= _S_IEXEC; | |
480b0c5b GV |
1907 | |
1908 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
1909 | ||
1910 | return 0; | |
1911 | } | |
1912 | ||
16bb7578 GV |
1913 | /* Provide fstat and utime as well as stat for consistent handling of |
1914 | file timestamps. */ | |
1915 | int | |
1916 | fstat (int desc, struct stat * buf) | |
1917 | { | |
1918 | HANDLE fh = (HANDLE) _get_osfhandle (desc); | |
1919 | BY_HANDLE_FILE_INFORMATION info; | |
1920 | DWORD fake_inode; | |
1921 | int permission; | |
1922 | ||
1923 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) | |
1924 | { | |
1925 | case FILE_TYPE_DISK: | |
1926 | buf->st_mode = _S_IFREG; | |
1927 | if (!GetFileInformationByHandle (fh, &info)) | |
1928 | { | |
1929 | errno = EACCES; | |
1930 | return -1; | |
1931 | } | |
1932 | break; | |
1933 | case FILE_TYPE_PIPE: | |
1934 | buf->st_mode = _S_IFIFO; | |
1935 | goto non_disk; | |
1936 | case FILE_TYPE_CHAR: | |
1937 | case FILE_TYPE_UNKNOWN: | |
1938 | default: | |
1939 | buf->st_mode = _S_IFCHR; | |
1940 | non_disk: | |
1941 | memset (&info, 0, sizeof (info)); | |
1942 | info.dwFileAttributes = 0; | |
1943 | info.ftCreationTime = utc_base_ft; | |
1944 | info.ftLastAccessTime = utc_base_ft; | |
1945 | info.ftLastWriteTime = utc_base_ft; | |
1946 | } | |
1947 | ||
1948 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1949 | { | |
1950 | buf->st_mode = _S_IFDIR; | |
1951 | buf->st_nlink = 2; /* doesn't really matter */ | |
1952 | fake_inode = 0; /* this doesn't either I think */ | |
1953 | } | |
1954 | else | |
1955 | { | |
1956 | buf->st_nlink = info.nNumberOfLinks; | |
1957 | /* Might as well use file index to fake inode values, but this | |
1958 | is not guaranteed to be unique unless we keep a handle open | |
1959 | all the time (even then there are situations where it is | |
1960 | not unique). Reputedly, there are at most 48 bits of info | |
1961 | (on NTFS, presumably less on FAT). */ | |
1962 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
1963 | } | |
1964 | ||
1965 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
1966 | if (sizeof (buf->st_ino) == 2) | |
1967 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
1968 | else | |
1969 | buf->st_ino = fake_inode; | |
1970 | ||
1971 | /* consider files to belong to current user */ | |
1972 | buf->st_uid = 0; | |
1973 | buf->st_gid = 0; | |
1974 | ||
1975 | buf->st_dev = info.dwVolumeSerialNumber; | |
1976 | buf->st_rdev = info.dwVolumeSerialNumber; | |
1977 | ||
1978 | buf->st_size = info.nFileSizeLow; | |
1979 | ||
1980 | /* Convert timestamps to Unix format. */ | |
1981 | buf->st_mtime = convert_time (info.ftLastWriteTime); | |
1982 | buf->st_atime = convert_time (info.ftLastAccessTime); | |
1983 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
1984 | buf->st_ctime = convert_time (info.ftCreationTime); | |
1985 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
1986 | ||
1987 | /* determine rwx permissions */ | |
1988 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
1989 | permission = _S_IREAD; | |
1990 | else | |
1991 | permission = _S_IREAD | _S_IWRITE; | |
1992 | ||
1993 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
1994 | permission |= _S_IEXEC; | |
1995 | else | |
1996 | { | |
1997 | #if 0 /* no way of knowing the filename */ | |
1998 | char * p = strrchr (name, '.'); | |
1999 | if (p != NULL && | |
2000 | (stricmp (p, ".exe") == 0 || | |
2001 | stricmp (p, ".com") == 0 || | |
2002 | stricmp (p, ".bat") == 0 || | |
2003 | stricmp (p, ".cmd") == 0)) | |
2004 | permission |= _S_IEXEC; | |
2005 | #endif | |
2006 | } | |
2007 | ||
2008 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2009 | ||
2010 | return 0; | |
2011 | } | |
2012 | ||
2013 | int | |
2014 | utime (const char *name, struct utimbuf *times) | |
2015 | { | |
2016 | struct utimbuf deftime; | |
2017 | HANDLE fh; | |
2018 | FILETIME mtime; | |
2019 | FILETIME atime; | |
2020 | ||
2021 | if (times == NULL) | |
2022 | { | |
2023 | deftime.modtime = deftime.actime = time (NULL); | |
2024 | times = &deftime; | |
2025 | } | |
2026 | ||
2027 | /* Need write access to set times. */ | |
2028 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, | |
2029 | 0, OPEN_EXISTING, 0, NULL); | |
2030 | if (fh) | |
2031 | { | |
2032 | convert_from_time_t (times->actime, &atime); | |
2033 | convert_from_time_t (times->modtime, &mtime); | |
2034 | if (!SetFileTime (fh, NULL, &atime, &mtime)) | |
2035 | { | |
2036 | CloseHandle (fh); | |
2037 | errno = EACCES; | |
2038 | return -1; | |
2039 | } | |
2040 | CloseHandle (fh); | |
2041 | } | |
2042 | else | |
2043 | { | |
2044 | errno = EINVAL; | |
2045 | return -1; | |
2046 | } | |
2047 | return 0; | |
2048 | } | |
2049 | ||
480b0c5b GV |
2050 | #ifdef HAVE_SOCKETS |
2051 | ||
2052 | /* Wrappers for winsock functions to map between our file descriptors | |
2053 | and winsock's handles; also set h_errno for convenience. | |
2054 | ||
2055 | To allow Emacs to run on systems which don't have winsock support | |
2056 | installed, we dynamically link to winsock on startup if present, and | |
2057 | otherwise provide the minimum necessary functionality | |
2058 | (eg. gethostname). */ | |
2059 | ||
2060 | /* function pointers for relevant socket functions */ | |
2061 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); | |
2062 | void (PASCAL *pfn_WSASetLastError) (int iError); | |
2063 | int (PASCAL *pfn_WSAGetLastError) (void); | |
2064 | int (PASCAL *pfn_socket) (int af, int type, int protocol); | |
2065 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2066 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2067 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); | |
2068 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); | |
2069 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); | |
2070 | int (PASCAL *pfn_closesocket) (SOCKET s); | |
2071 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); | |
2072 | int (PASCAL *pfn_WSACleanup) (void); | |
2073 | ||
2074 | u_short (PASCAL *pfn_htons) (u_short hostshort); | |
2075 | u_short (PASCAL *pfn_ntohs) (u_short netshort); | |
2076 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); | |
2077 | int (PASCAL *pfn_gethostname) (char * name, int namelen); | |
2078 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); | |
2079 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); | |
f1614061 RS |
2080 | |
2081 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ | |
2082 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); | |
2083 | #ifndef HANDLE_FLAG_INHERIT | |
2084 | #define HANDLE_FLAG_INHERIT 1 | |
2085 | #endif | |
480b0c5b | 2086 | |
f249a012 RS |
2087 | HANDLE winsock_lib; |
2088 | static int winsock_inuse; | |
480b0c5b | 2089 | |
f249a012 | 2090 | BOOL |
480b0c5b GV |
2091 | term_winsock (void) |
2092 | { | |
f249a012 | 2093 | if (winsock_lib != NULL && winsock_inuse == 0) |
480b0c5b | 2094 | { |
f249a012 RS |
2095 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
2096 | after WSAStartup returns successfully, but it seems reasonable | |
2097 | to allow unloading winsock anyway in that case. */ | |
2098 | if (pfn_WSACleanup () == 0 || | |
2099 | pfn_WSAGetLastError () == WSAENETDOWN) | |
2100 | { | |
2101 | if (FreeLibrary (winsock_lib)) | |
2102 | winsock_lib = NULL; | |
2103 | return TRUE; | |
2104 | } | |
480b0c5b | 2105 | } |
f249a012 | 2106 | return FALSE; |
480b0c5b GV |
2107 | } |
2108 | ||
f249a012 RS |
2109 | BOOL |
2110 | init_winsock (int load_now) | |
480b0c5b GV |
2111 | { |
2112 | WSADATA winsockData; | |
2113 | ||
f249a012 RS |
2114 | if (winsock_lib != NULL) |
2115 | return TRUE; | |
f1614061 RS |
2116 | |
2117 | pfn_SetHandleInformation = NULL; | |
2118 | pfn_SetHandleInformation | |
2119 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
2120 | "SetHandleInformation"); | |
2121 | ||
480b0c5b GV |
2122 | winsock_lib = LoadLibrary ("wsock32.dll"); |
2123 | ||
2124 | if (winsock_lib != NULL) | |
2125 | { | |
2126 | /* dynamically link to socket functions */ | |
2127 | ||
2128 | #define LOAD_PROC(fn) \ | |
2129 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ | |
2130 | goto fail; | |
2131 | ||
2132 | LOAD_PROC( WSAStartup ); | |
2133 | LOAD_PROC( WSASetLastError ); | |
2134 | LOAD_PROC( WSAGetLastError ); | |
2135 | LOAD_PROC( socket ); | |
2136 | LOAD_PROC( bind ); | |
2137 | LOAD_PROC( connect ); | |
2138 | LOAD_PROC( ioctlsocket ); | |
2139 | LOAD_PROC( recv ); | |
2140 | LOAD_PROC( send ); | |
2141 | LOAD_PROC( closesocket ); | |
2142 | LOAD_PROC( shutdown ); | |
2143 | LOAD_PROC( htons ); | |
2144 | LOAD_PROC( ntohs ); | |
2145 | LOAD_PROC( inet_addr ); | |
2146 | LOAD_PROC( gethostname ); | |
2147 | LOAD_PROC( gethostbyname ); | |
2148 | LOAD_PROC( getservbyname ); | |
2149 | LOAD_PROC( WSACleanup ); | |
2150 | ||
f249a012 RS |
2151 | #undef LOAD_PROC |
2152 | ||
480b0c5b GV |
2153 | /* specify version 1.1 of winsock */ |
2154 | if (pfn_WSAStartup (0x101, &winsockData) == 0) | |
2155 | { | |
f249a012 RS |
2156 | if (winsockData.wVersion != 0x101) |
2157 | goto fail; | |
2158 | ||
2159 | if (!load_now) | |
2160 | { | |
2161 | /* Report that winsock exists and is usable, but leave | |
2162 | socket functions disabled. I am assuming that calling | |
2163 | WSAStartup does not require any network interaction, | |
2164 | and in particular does not cause or require a dial-up | |
2165 | connection to be established. */ | |
2166 | ||
2167 | pfn_WSACleanup (); | |
2168 | FreeLibrary (winsock_lib); | |
2169 | winsock_lib = NULL; | |
2170 | } | |
2171 | winsock_inuse = 0; | |
2172 | return TRUE; | |
480b0c5b GV |
2173 | } |
2174 | ||
2175 | fail: | |
2176 | FreeLibrary (winsock_lib); | |
f249a012 | 2177 | winsock_lib = NULL; |
480b0c5b | 2178 | } |
f249a012 RS |
2179 | |
2180 | return FALSE; | |
480b0c5b GV |
2181 | } |
2182 | ||
2183 | ||
2184 | int h_errno = 0; | |
2185 | ||
2186 | /* function to set h_errno for compatability; map winsock error codes to | |
2187 | normal system codes where they overlap (non-overlapping definitions | |
2188 | are already in <sys/socket.h> */ | |
2189 | static void set_errno () | |
2190 | { | |
f249a012 | 2191 | if (winsock_lib == NULL) |
480b0c5b GV |
2192 | h_errno = EINVAL; |
2193 | else | |
2194 | h_errno = pfn_WSAGetLastError (); | |
2195 | ||
2196 | switch (h_errno) | |
2197 | { | |
2198 | case WSAEACCES: h_errno = EACCES; break; | |
2199 | case WSAEBADF: h_errno = EBADF; break; | |
2200 | case WSAEFAULT: h_errno = EFAULT; break; | |
2201 | case WSAEINTR: h_errno = EINTR; break; | |
2202 | case WSAEINVAL: h_errno = EINVAL; break; | |
2203 | case WSAEMFILE: h_errno = EMFILE; break; | |
2204 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; | |
2205 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; | |
2206 | } | |
2207 | errno = h_errno; | |
2208 | } | |
2209 | ||
2210 | static void check_errno () | |
2211 | { | |
f249a012 | 2212 | if (h_errno == 0 && winsock_lib != NULL) |
480b0c5b GV |
2213 | pfn_WSASetLastError (0); |
2214 | } | |
2215 | ||
2216 | /* [andrewi 3-May-96] I've had conflicting results using both methods, | |
2217 | but I believe the method of keeping the socket handle separate (and | |
2218 | insuring it is not inheritable) is the correct one. */ | |
2219 | ||
2220 | //#define SOCK_REPLACE_HANDLE | |
2221 | ||
2222 | #ifdef SOCK_REPLACE_HANDLE | |
2223 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) | |
2224 | #else | |
2225 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) | |
2226 | #endif | |
2227 | ||
2228 | int | |
2229 | sys_socket(int af, int type, int protocol) | |
2230 | { | |
2231 | int fd; | |
2232 | long s; | |
2233 | child_process * cp; | |
2234 | ||
f249a012 | 2235 | if (winsock_lib == NULL) |
480b0c5b GV |
2236 | { |
2237 | h_errno = ENETDOWN; | |
2238 | return INVALID_SOCKET; | |
2239 | } | |
2240 | ||
2241 | check_errno (); | |
2242 | ||
2243 | /* call the real socket function */ | |
2244 | s = (long) pfn_socket (af, type, protocol); | |
2245 | ||
2246 | if (s != INVALID_SOCKET) | |
2247 | { | |
2248 | /* Although under NT 3.5 _open_osfhandle will accept a socket | |
2249 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, | |
2250 | that does not work under NT 3.1. However, we can get the same | |
2251 | effect by using a backdoor function to replace an existing | |
2252 | descriptor handle with the one we want. */ | |
2253 | ||
2254 | /* allocate a file descriptor (with appropriate flags) */ | |
2255 | fd = _open ("NUL:", _O_RDWR); | |
2256 | if (fd >= 0) | |
2257 | { | |
2258 | #ifdef SOCK_REPLACE_HANDLE | |
2259 | /* now replace handle to NUL with our socket handle */ | |
2260 | CloseHandle ((HANDLE) _get_osfhandle (fd)); | |
2261 | _free_osfhnd (fd); | |
2262 | _set_osfhnd (fd, s); | |
2263 | /* setmode (fd, _O_BINARY); */ | |
2264 | #else | |
2265 | /* Make a non-inheritable copy of the socket handle. */ | |
2266 | { | |
2267 | HANDLE parent; | |
2268 | HANDLE new_s = INVALID_HANDLE_VALUE; | |
2269 | ||
2270 | parent = GetCurrentProcess (); | |
2271 | ||
f1614061 RS |
2272 | /* Apparently there is a bug in NT 3.51 with some service |
2273 | packs, which prevents using DuplicateHandle to make a | |
2274 | socket handle non-inheritable (causes WSACleanup to | |
2275 | hang). The work-around is to use SetHandleInformation | |
2276 | instead if it is available and implemented. */ | |
2277 | if (!pfn_SetHandleInformation | |
2278 | || !pfn_SetHandleInformation ((HANDLE) s, | |
2279 | HANDLE_FLAG_INHERIT, | |
caf1a172 | 2280 | 0)) |
f1614061 RS |
2281 | { |
2282 | DuplicateHandle (parent, | |
2283 | (HANDLE) s, | |
2284 | parent, | |
2285 | &new_s, | |
2286 | 0, | |
2287 | FALSE, | |
2288 | DUPLICATE_SAME_ACCESS); | |
2289 | pfn_closesocket (s); | |
2290 | s = (SOCKET) new_s; | |
2291 | } | |
2292 | fd_info[fd].hnd = (HANDLE) s; | |
480b0c5b GV |
2293 | } |
2294 | #endif | |
2295 | ||
2296 | /* set our own internal flags */ | |
2297 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; | |
2298 | ||
2299 | cp = new_child (); | |
2300 | if (cp) | |
2301 | { | |
2302 | cp->fd = fd; | |
2303 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
2304 | ||
2305 | /* attach child_process to fd_info */ | |
2306 | if (fd_info[ fd ].cp != NULL) | |
2307 | { | |
2308 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); | |
2309 | abort (); | |
2310 | } | |
2311 | ||
2312 | fd_info[ fd ].cp = cp; | |
2313 | ||
2314 | /* success! */ | |
f249a012 | 2315 | winsock_inuse++; /* count open sockets */ |
480b0c5b GV |
2316 | return fd; |
2317 | } | |
2318 | ||
2319 | /* clean up */ | |
2320 | _close (fd); | |
2321 | } | |
2322 | pfn_closesocket (s); | |
2323 | h_errno = EMFILE; | |
2324 | } | |
2325 | set_errno (); | |
2326 | ||
2327 | return -1; | |
2328 | } | |
2329 | ||
2330 | ||
2331 | int | |
2332 | sys_bind (int s, const struct sockaddr * addr, int namelen) | |
2333 | { | |
f249a012 | 2334 | if (winsock_lib == NULL) |
480b0c5b GV |
2335 | { |
2336 | h_errno = ENOTSOCK; | |
2337 | return SOCKET_ERROR; | |
2338 | } | |
2339 | ||
2340 | check_errno (); | |
2341 | if (fd_info[s].flags & FILE_SOCKET) | |
2342 | { | |
2343 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); | |
2344 | if (rc == SOCKET_ERROR) | |
2345 | set_errno (); | |
2346 | return rc; | |
2347 | } | |
2348 | h_errno = ENOTSOCK; | |
2349 | return SOCKET_ERROR; | |
2350 | } | |
2351 | ||
2352 | ||
2353 | int | |
2354 | sys_connect (int s, const struct sockaddr * name, int namelen) | |
2355 | { | |
f249a012 | 2356 | if (winsock_lib == NULL) |
480b0c5b GV |
2357 | { |
2358 | h_errno = ENOTSOCK; | |
2359 | return SOCKET_ERROR; | |
2360 | } | |
2361 | ||
2362 | check_errno (); | |
2363 | if (fd_info[s].flags & FILE_SOCKET) | |
2364 | { | |
2365 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); | |
2366 | if (rc == SOCKET_ERROR) | |
2367 | set_errno (); | |
2368 | return rc; | |
2369 | } | |
2370 | h_errno = ENOTSOCK; | |
2371 | return SOCKET_ERROR; | |
2372 | } | |
2373 | ||
2374 | u_short | |
2375 | sys_htons (u_short hostshort) | |
2376 | { | |
f249a012 | 2377 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2378 | pfn_htons (hostshort) : hostshort; |
2379 | } | |
2380 | ||
2381 | u_short | |
2382 | sys_ntohs (u_short netshort) | |
2383 | { | |
f249a012 | 2384 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2385 | pfn_ntohs (netshort) : netshort; |
2386 | } | |
2387 | ||
2388 | unsigned long | |
2389 | sys_inet_addr (const char * cp) | |
2390 | { | |
f249a012 | 2391 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2392 | pfn_inet_addr (cp) : INADDR_NONE; |
2393 | } | |
2394 | ||
2395 | int | |
2396 | sys_gethostname (char * name, int namelen) | |
2397 | { | |
f249a012 | 2398 | if (winsock_lib != NULL) |
480b0c5b GV |
2399 | return pfn_gethostname (name, namelen); |
2400 | ||
2401 | if (namelen > MAX_COMPUTERNAME_LENGTH) | |
2402 | return !GetComputerName (name, &namelen); | |
2403 | ||
2404 | h_errno = EFAULT; | |
2405 | return SOCKET_ERROR; | |
2406 | } | |
2407 | ||
2408 | struct hostent * | |
2409 | sys_gethostbyname(const char * name) | |
2410 | { | |
2411 | struct hostent * host; | |
2412 | ||
f249a012 | 2413 | if (winsock_lib == NULL) |
480b0c5b GV |
2414 | { |
2415 | h_errno = ENETDOWN; | |
2416 | return NULL; | |
2417 | } | |
2418 | ||
2419 | check_errno (); | |
2420 | host = pfn_gethostbyname (name); | |
2421 | if (!host) | |
2422 | set_errno (); | |
2423 | return host; | |
2424 | } | |
2425 | ||
2426 | struct servent * | |
2427 | sys_getservbyname(const char * name, const char * proto) | |
2428 | { | |
2429 | struct servent * serv; | |
2430 | ||
f249a012 | 2431 | if (winsock_lib == NULL) |
480b0c5b GV |
2432 | { |
2433 | h_errno = ENETDOWN; | |
2434 | return NULL; | |
2435 | } | |
2436 | ||
2437 | check_errno (); | |
2438 | serv = pfn_getservbyname (name, proto); | |
2439 | if (!serv) | |
2440 | set_errno (); | |
2441 | return serv; | |
2442 | } | |
2443 | ||
380961a6 GV |
2444 | int |
2445 | sys_shutdown (int s, int how) | |
2446 | { | |
2447 | int rc; | |
2448 | ||
2449 | if (winsock_lib == NULL) | |
2450 | { | |
2451 | h_errno = ENETDOWN; | |
2452 | return SOCKET_ERROR; | |
2453 | } | |
2454 | ||
2455 | check_errno (); | |
2456 | if (fd_info[s].flags & FILE_SOCKET) | |
2457 | { | |
2458 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); | |
2459 | if (rc == SOCKET_ERROR) | |
2460 | set_errno (); | |
2461 | return rc; | |
2462 | } | |
2463 | h_errno = ENOTSOCK; | |
2464 | return SOCKET_ERROR; | |
2465 | } | |
2466 | ||
480b0c5b GV |
2467 | #endif /* HAVE_SOCKETS */ |
2468 | ||
2469 | ||
2470 | /* Shadow main io functions: we need to handle pipes and sockets more | |
2471 | intelligently, and implement non-blocking mode as well. */ | |
2472 | ||
2473 | int | |
2474 | sys_close (int fd) | |
2475 | { | |
2476 | int rc; | |
2477 | ||
2478 | if (fd < 0 || fd >= MAXDESC) | |
2479 | { | |
2480 | errno = EBADF; | |
2481 | return -1; | |
2482 | } | |
2483 | ||
2484 | if (fd_info[fd].cp) | |
2485 | { | |
2486 | child_process * cp = fd_info[fd].cp; | |
2487 | ||
2488 | fd_info[fd].cp = NULL; | |
2489 | ||
2490 | if (CHILD_ACTIVE (cp)) | |
2491 | { | |
2492 | /* if last descriptor to active child_process then cleanup */ | |
2493 | int i; | |
2494 | for (i = 0; i < MAXDESC; i++) | |
2495 | { | |
2496 | if (i == fd) | |
2497 | continue; | |
2498 | if (fd_info[i].cp == cp) | |
2499 | break; | |
2500 | } | |
2501 | if (i == MAXDESC) | |
2502 | { | |
f249a012 | 2503 | #ifdef HAVE_SOCKETS |
480b0c5b GV |
2504 | if (fd_info[fd].flags & FILE_SOCKET) |
2505 | { | |
f249a012 RS |
2506 | #ifndef SOCK_REPLACE_HANDLE |
2507 | if (winsock_lib == NULL) abort (); | |
480b0c5b GV |
2508 | |
2509 | pfn_shutdown (SOCK_HANDLE (fd), 2); | |
2510 | rc = pfn_closesocket (SOCK_HANDLE (fd)); | |
f249a012 RS |
2511 | #endif |
2512 | winsock_inuse--; /* count open sockets */ | |
480b0c5b GV |
2513 | } |
2514 | #endif | |
2515 | delete_child (cp); | |
2516 | } | |
2517 | } | |
2518 | } | |
2519 | ||
2520 | /* Note that sockets do not need special treatment here (at least on | |
e9e23e23 | 2521 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
480b0c5b GV |
2522 | closesocket is equivalent to CloseHandle, which is to be expected |
2523 | because socket handles are fully fledged kernel handles. */ | |
2524 | rc = _close (fd); | |
2525 | ||
2526 | if (rc == 0) | |
2527 | fd_info[fd].flags = 0; | |
2528 | ||
2529 | return rc; | |
2530 | } | |
2531 | ||
2532 | int | |
2533 | sys_dup (int fd) | |
2534 | { | |
2535 | int new_fd; | |
2536 | ||
2537 | new_fd = _dup (fd); | |
2538 | if (new_fd >= 0) | |
2539 | { | |
2540 | /* duplicate our internal info as well */ | |
2541 | fd_info[new_fd] = fd_info[fd]; | |
2542 | } | |
2543 | return new_fd; | |
2544 | } | |
2545 | ||
2546 | ||
2547 | int | |
2548 | sys_dup2 (int src, int dst) | |
2549 | { | |
2550 | int rc; | |
2551 | ||
2552 | if (dst < 0 || dst >= MAXDESC) | |
2553 | { | |
2554 | errno = EBADF; | |
2555 | return -1; | |
2556 | } | |
2557 | ||
2558 | /* make sure we close the destination first if it's a pipe or socket */ | |
2559 | if (src != dst && fd_info[dst].flags != 0) | |
2560 | sys_close (dst); | |
2561 | ||
2562 | rc = _dup2 (src, dst); | |
2563 | if (rc == 0) | |
2564 | { | |
2565 | /* duplicate our internal info as well */ | |
2566 | fd_info[dst] = fd_info[src]; | |
2567 | } | |
2568 | return rc; | |
2569 | } | |
2570 | ||
480b0c5b GV |
2571 | /* Unix pipe() has only one arg */ |
2572 | int | |
2573 | sys_pipe (int * phandles) | |
2574 | { | |
2575 | int rc; | |
2576 | unsigned flags; | |
2577 | child_process * cp; | |
2578 | ||
76b3903d GV |
2579 | /* make pipe handles non-inheritable; when we spawn a child, we |
2580 | replace the relevant handle with an inheritable one. Also put | |
2581 | pipes into binary mode; we will do text mode translation ourselves | |
2582 | if required. */ | |
2583 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); | |
480b0c5b GV |
2584 | |
2585 | if (rc == 0) | |
2586 | { | |
7664e306 | 2587 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
480b0c5b GV |
2588 | fd_info[phandles[0]].flags = flags; |
2589 | ||
7664e306 | 2590 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
480b0c5b GV |
2591 | fd_info[phandles[1]].flags = flags; |
2592 | } | |
2593 | ||
2594 | return rc; | |
2595 | } | |
2596 | ||
f7554349 | 2597 | /* From ntproc.c */ |
fbd6baed | 2598 | extern Lisp_Object Vw32_pipe_read_delay; |
f7554349 | 2599 | |
480b0c5b GV |
2600 | /* Function to do blocking read of one byte, needed to implement |
2601 | select. It is only allowed on sockets and pipes. */ | |
2602 | int | |
2603 | _sys_read_ahead (int fd) | |
2604 | { | |
2605 | child_process * cp; | |
2606 | int rc; | |
2607 | ||
2608 | if (fd < 0 || fd >= MAXDESC) | |
2609 | return STATUS_READ_ERROR; | |
2610 | ||
2611 | cp = fd_info[fd].cp; | |
2612 | ||
2613 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) | |
2614 | return STATUS_READ_ERROR; | |
2615 | ||
2616 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 | |
2617 | || (fd_info[fd].flags & FILE_READ) == 0) | |
2618 | { | |
2619 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); | |
2620 | abort (); | |
2621 | } | |
2622 | ||
2623 | cp->status = STATUS_READ_IN_PROGRESS; | |
2624 | ||
2625 | if (fd_info[fd].flags & FILE_PIPE) | |
f7554349 | 2626 | { |
f7554349 KH |
2627 | rc = _read (fd, &cp->chr, sizeof (char)); |
2628 | ||
2629 | /* Give subprocess time to buffer some more output for us before | |
e9e23e23 | 2630 | reporting that input is available; we need this because Windows 95 |
f7554349 KH |
2631 | connects DOS programs to pipes by making the pipe appear to be |
2632 | the normal console stdout - as a result most DOS programs will | |
2633 | write to stdout without buffering, ie. one character at a | |
fbd6baed | 2634 | time. Even some W32 programs do this - "dir" in a command |
f7554349 KH |
2635 | shell on NT is very slow if we don't do this. */ |
2636 | if (rc > 0) | |
2637 | { | |
fbd6baed | 2638 | int wait = XINT (Vw32_pipe_read_delay); |
f7554349 KH |
2639 | |
2640 | if (wait > 0) | |
2641 | Sleep (wait); | |
2642 | else if (wait < 0) | |
2643 | while (++wait <= 0) | |
2644 | /* Yield remainder of our time slice, effectively giving a | |
2645 | temporary priority boost to the child process. */ | |
2646 | Sleep (0); | |
2647 | } | |
2648 | } | |
480b0c5b GV |
2649 | #ifdef HAVE_SOCKETS |
2650 | else if (fd_info[fd].flags & FILE_SOCKET) | |
2651 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); | |
2652 | #endif | |
2653 | ||
2654 | if (rc == sizeof (char)) | |
2655 | cp->status = STATUS_READ_SUCCEEDED; | |
2656 | else | |
2657 | cp->status = STATUS_READ_FAILED; | |
2658 | ||
2659 | return cp->status; | |
2660 | } | |
2661 | ||
2662 | int | |
2663 | sys_read (int fd, char * buffer, unsigned int count) | |
2664 | { | |
2665 | int nchars; | |
480b0c5b GV |
2666 | int to_read; |
2667 | DWORD waiting; | |
76b3903d | 2668 | char * orig_buffer = buffer; |
480b0c5b GV |
2669 | |
2670 | if (fd < 0 || fd >= MAXDESC) | |
2671 | { | |
2672 | errno = EBADF; | |
2673 | return -1; | |
2674 | } | |
2675 | ||
2676 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
2677 | { | |
2678 | child_process *cp = fd_info[fd].cp; | |
2679 | ||
2680 | if ((fd_info[fd].flags & FILE_READ) == 0) | |
2681 | { | |
2682 | errno = EBADF; | |
2683 | return -1; | |
2684 | } | |
2685 | ||
76b3903d GV |
2686 | nchars = 0; |
2687 | ||
2688 | /* re-read CR carried over from last read */ | |
2689 | if (fd_info[fd].flags & FILE_LAST_CR) | |
2690 | { | |
2691 | if (fd_info[fd].flags & FILE_BINARY) abort (); | |
2692 | *buffer++ = 0x0d; | |
2693 | count--; | |
2694 | nchars++; | |
f52eb3ef | 2695 | fd_info[fd].flags &= ~FILE_LAST_CR; |
76b3903d GV |
2696 | } |
2697 | ||
480b0c5b GV |
2698 | /* presence of a child_process structure means we are operating in |
2699 | non-blocking mode - otherwise we just call _read directly. | |
2700 | Note that the child_process structure might be missing because | |
2701 | reap_subprocess has been called; in this case the pipe is | |
2702 | already broken, so calling _read on it is okay. */ | |
2703 | if (cp) | |
2704 | { | |
2705 | int current_status = cp->status; | |
2706 | ||
2707 | switch (current_status) | |
2708 | { | |
2709 | case STATUS_READ_FAILED: | |
2710 | case STATUS_READ_ERROR: | |
f52eb3ef GV |
2711 | /* report normal EOF if nothing in buffer */ |
2712 | if (nchars <= 0) | |
2713 | fd_info[fd].flags |= FILE_AT_EOF; | |
2714 | return nchars; | |
480b0c5b GV |
2715 | |
2716 | case STATUS_READ_READY: | |
2717 | case STATUS_READ_IN_PROGRESS: | |
2718 | DebPrint (("sys_read called when read is in progress\n")); | |
2719 | errno = EWOULDBLOCK; | |
2720 | return -1; | |
2721 | ||
2722 | case STATUS_READ_SUCCEEDED: | |
2723 | /* consume read-ahead char */ | |
2724 | *buffer++ = cp->chr; | |
2725 | count--; | |
76b3903d | 2726 | nchars++; |
480b0c5b GV |
2727 | cp->status = STATUS_READ_ACKNOWLEDGED; |
2728 | ResetEvent (cp->char_avail); | |
2729 | ||
2730 | case STATUS_READ_ACKNOWLEDGED: | |
2731 | break; | |
2732 | ||
2733 | default: | |
2734 | DebPrint (("sys_read: bad status %d\n", current_status)); | |
2735 | errno = EBADF; | |
2736 | return -1; | |
2737 | } | |
2738 | ||
2739 | if (fd_info[fd].flags & FILE_PIPE) | |
2740 | { | |
2741 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); | |
2742 | to_read = min (waiting, (DWORD) count); | |
f52eb3ef GV |
2743 | |
2744 | if (to_read > 0) | |
2745 | nchars += _read (fd, buffer, to_read); | |
480b0c5b GV |
2746 | } |
2747 | #ifdef HAVE_SOCKETS | |
2748 | else /* FILE_SOCKET */ | |
2749 | { | |
f249a012 | 2750 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
2751 | |
2752 | /* do the equivalent of a non-blocking read */ | |
2753 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); | |
76b3903d | 2754 | if (waiting == 0 && nchars == 0) |
480b0c5b GV |
2755 | { |
2756 | h_errno = errno = EWOULDBLOCK; | |
2757 | return -1; | |
2758 | } | |
2759 | ||
480b0c5b GV |
2760 | if (waiting) |
2761 | { | |
2762 | /* always use binary mode for sockets */ | |
76b3903d GV |
2763 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
2764 | if (res == SOCKET_ERROR) | |
480b0c5b GV |
2765 | { |
2766 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", | |
2767 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
76b3903d GV |
2768 | set_errno (); |
2769 | return -1; | |
480b0c5b | 2770 | } |
76b3903d | 2771 | nchars += res; |
480b0c5b GV |
2772 | } |
2773 | } | |
2774 | #endif | |
2775 | } | |
2776 | else | |
f52eb3ef GV |
2777 | { |
2778 | int nread = _read (fd, buffer, count); | |
2779 | if (nread >= 0) | |
2780 | nchars += nread; | |
2781 | else if (nchars == 0) | |
2782 | nchars = nread; | |
2783 | } | |
76b3903d | 2784 | |
f52eb3ef GV |
2785 | if (nchars <= 0) |
2786 | fd_info[fd].flags |= FILE_AT_EOF; | |
76b3903d | 2787 | /* Perform text mode translation if required. */ |
f52eb3ef | 2788 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
76b3903d GV |
2789 | { |
2790 | nchars = crlf_to_lf (nchars, orig_buffer); | |
2791 | /* If buffer contains only CR, return that. To be absolutely | |
2792 | sure we should attempt to read the next char, but in | |
2793 | practice a CR to be followed by LF would not appear by | |
2794 | itself in the buffer. */ | |
2795 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) | |
2796 | { | |
2797 | fd_info[fd].flags |= FILE_LAST_CR; | |
2798 | nchars--; | |
2799 | } | |
76b3903d | 2800 | } |
480b0c5b GV |
2801 | } |
2802 | else | |
2803 | nchars = _read (fd, buffer, count); | |
2804 | ||
76b3903d | 2805 | return nchars; |
480b0c5b GV |
2806 | } |
2807 | ||
2808 | /* For now, don't bother with a non-blocking mode */ | |
2809 | int | |
2810 | sys_write (int fd, const void * buffer, unsigned int count) | |
2811 | { | |
2812 | int nchars; | |
2813 | ||
2814 | if (fd < 0 || fd >= MAXDESC) | |
2815 | { | |
2816 | errno = EBADF; | |
2817 | return -1; | |
2818 | } | |
2819 | ||
2820 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
76b3903d GV |
2821 | { |
2822 | if ((fd_info[fd].flags & FILE_WRITE) == 0) | |
2823 | { | |
2824 | errno = EBADF; | |
2825 | return -1; | |
2826 | } | |
2827 | ||
2828 | /* Perform text mode translation if required. */ | |
2829 | if ((fd_info[fd].flags & FILE_BINARY) == 0) | |
2830 | { | |
2831 | char * tmpbuf = alloca (count * 2); | |
2832 | unsigned char * src = (void *)buffer; | |
2833 | unsigned char * dst = tmpbuf; | |
2834 | int nbytes = count; | |
2835 | ||
2836 | while (1) | |
2837 | { | |
2838 | unsigned char *next; | |
2839 | /* copy next line or remaining bytes */ | |
2840 | next = _memccpy (dst, src, '\n', nbytes); | |
2841 | if (next) | |
2842 | { | |
2843 | /* copied one line ending with '\n' */ | |
2844 | int copied = next - dst; | |
2845 | nbytes -= copied; | |
2846 | src += copied; | |
2847 | /* insert '\r' before '\n' */ | |
2848 | next[-1] = '\r'; | |
2849 | next[0] = '\n'; | |
2850 | dst = next + 1; | |
2851 | count++; | |
2852 | } | |
2853 | else | |
2854 | /* copied remaining partial line -> now finished */ | |
2855 | break; | |
2856 | } | |
2857 | buffer = tmpbuf; | |
2858 | } | |
2859 | } | |
2860 | ||
480b0c5b GV |
2861 | #ifdef HAVE_SOCKETS |
2862 | if (fd_info[fd].flags & FILE_SOCKET) | |
2863 | { | |
f249a012 | 2864 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
2865 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
2866 | if (nchars == SOCKET_ERROR) | |
2867 | { | |
2868 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", | |
2869 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
2870 | set_errno (); | |
2871 | } | |
2872 | } | |
2873 | else | |
2874 | #endif | |
2875 | nchars = _write (fd, buffer, count); | |
2876 | ||
2877 | return nchars; | |
2878 | } | |
2879 | ||
f52eb3ef GV |
2880 | static void |
2881 | check_windows_init_file () | |
2882 | { | |
2883 | extern int noninteractive, inhibit_window_system; | |
2884 | ||
2885 | /* A common indication that Emacs is not installed properly is when | |
2886 | it cannot find the Windows installation file. If this file does | |
2887 | not exist in the expected place, tell the user. */ | |
2888 | ||
2889 | if (!noninteractive && !inhibit_window_system) { | |
2890 | extern Lisp_Object Vwindow_system, Vload_path; | |
2891 | Lisp_Object init_file; | |
2892 | int fd; | |
2893 | ||
2894 | init_file = build_string ("term/w32-win"); | |
2895 | fd = openp (Vload_path, init_file, ".el:.elc", NULL, 0); | |
2896 | if (fd < 0) { | |
2897 | Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil); | |
2898 | char *init_file_name = XSTRING (init_file)->data; | |
2899 | char *load_path = XSTRING (load_path_print)->data; | |
2900 | char *buffer = alloca (1024); | |
2901 | ||
2902 | sprintf (buffer, | |
2903 | "The Emacs Windows initialization file \"%s.el\" " | |
2904 | "could not be found in your Emacs installation. " | |
2905 | "Emacs checked the following directories for this file:\n" | |
2906 | "\n%s\n\n" | |
2907 | "When Emacs cannot find this file, it usually means that it " | |
2908 | "was not installed properly, or its distribution file was " | |
2909 | "not unpacked properly.\nSee the README.W32 file in the " | |
2910 | "top-level Emacs directory for more information.", | |
2911 | init_file_name, load_path); | |
2912 | MessageBox (NULL, | |
2913 | buffer, | |
2914 | "Emacs Abort Dialog", | |
2915 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); | |
2916 | close (fd); | |
2917 | ||
2918 | /* Use the low-level Emacs abort. */ | |
2919 | #undef abort | |
2920 | abort (); | |
2921 | } | |
2922 | } | |
2923 | } | |
480b0c5b GV |
2924 | |
2925 | void | |
2926 | term_ntproc () | |
2927 | { | |
2928 | #ifdef HAVE_SOCKETS | |
2929 | /* shutdown the socket interface if necessary */ | |
2930 | term_winsock (); | |
2931 | #endif | |
f52eb3ef GV |
2932 | |
2933 | /* Check whether we are shutting down because we cannot find the | |
2934 | Windows initialization file. Do this during shutdown so that | |
2935 | Emacs is initialized as possible, and so that it is out of the | |
2936 | critical startup path. */ | |
2937 | check_windows_init_file (); | |
480b0c5b GV |
2938 | } |
2939 | ||
2940 | void | |
2941 | init_ntproc () | |
2942 | { | |
2943 | #ifdef HAVE_SOCKETS | |
f249a012 RS |
2944 | /* Initialise the socket interface now if available and requested by |
2945 | the user by defining PRELOAD_WINSOCK; otherwise loading will be | |
fbd6baed | 2946 | delayed until open-network-stream is called (w32-has-winsock can |
f249a012 RS |
2947 | also be used to dynamically load or reload winsock). |
2948 | ||
2949 | Conveniently, init_environment is called before us, so | |
2950 | PRELOAD_WINSOCK can be set in the registry. */ | |
2951 | ||
2952 | /* Always initialize this correctly. */ | |
2953 | winsock_lib = NULL; | |
2954 | ||
2955 | if (getenv ("PRELOAD_WINSOCK") != NULL) | |
2956 | init_winsock (TRUE); | |
480b0c5b GV |
2957 | #endif |
2958 | ||
2959 | /* Initial preparation for subprocess support: replace our standard | |
2960 | handles with non-inheritable versions. */ | |
2961 | { | |
2962 | HANDLE parent; | |
2963 | HANDLE stdin_save = INVALID_HANDLE_VALUE; | |
2964 | HANDLE stdout_save = INVALID_HANDLE_VALUE; | |
2965 | HANDLE stderr_save = INVALID_HANDLE_VALUE; | |
2966 | ||
2967 | parent = GetCurrentProcess (); | |
2968 | ||
2969 | /* ignore errors when duplicating and closing; typically the | |
2970 | handles will be invalid when running as a gui program. */ | |
2971 | DuplicateHandle (parent, | |
2972 | GetStdHandle (STD_INPUT_HANDLE), | |
2973 | parent, | |
2974 | &stdin_save, | |
2975 | 0, | |
2976 | FALSE, | |
2977 | DUPLICATE_SAME_ACCESS); | |
2978 | ||
2979 | DuplicateHandle (parent, | |
2980 | GetStdHandle (STD_OUTPUT_HANDLE), | |
2981 | parent, | |
2982 | &stdout_save, | |
2983 | 0, | |
2984 | FALSE, | |
2985 | DUPLICATE_SAME_ACCESS); | |
2986 | ||
2987 | DuplicateHandle (parent, | |
2988 | GetStdHandle (STD_ERROR_HANDLE), | |
2989 | parent, | |
2990 | &stderr_save, | |
2991 | 0, | |
2992 | FALSE, | |
2993 | DUPLICATE_SAME_ACCESS); | |
2994 | ||
2995 | fclose (stdin); | |
2996 | fclose (stdout); | |
2997 | fclose (stderr); | |
2998 | ||
2999 | if (stdin_save != INVALID_HANDLE_VALUE) | |
3000 | _open_osfhandle ((long) stdin_save, O_TEXT); | |
3001 | else | |
76b3903d GV |
3002 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
3003 | _fdopen (0, "r"); | |
480b0c5b GV |
3004 | |
3005 | if (stdout_save != INVALID_HANDLE_VALUE) | |
3006 | _open_osfhandle ((long) stdout_save, O_TEXT); | |
3007 | else | |
76b3903d GV |
3008 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3009 | _fdopen (1, "w"); | |
480b0c5b GV |
3010 | |
3011 | if (stderr_save != INVALID_HANDLE_VALUE) | |
3012 | _open_osfhandle ((long) stderr_save, O_TEXT); | |
3013 | else | |
76b3903d GV |
3014 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3015 | _fdopen (2, "w"); | |
480b0c5b GV |
3016 | } |
3017 | ||
3018 | /* unfortunately, atexit depends on implementation of malloc */ | |
3019 | /* atexit (term_ntproc); */ | |
3020 | signal (SIGABRT, term_ntproc); | |
76b3903d GV |
3021 | |
3022 | /* determine which drives are fixed, for GetCachedVolumeInformation */ | |
3023 | { | |
3024 | /* GetDriveType must have trailing backslash. */ | |
3025 | char drive[] = "A:\\"; | |
3026 | ||
3027 | /* Loop over all possible drive letters */ | |
3028 | while (*drive <= 'Z') | |
3029 | { | |
3030 | /* Record if this drive letter refers to a fixed drive. */ | |
3031 | fixed_drives[DRIVE_INDEX (*drive)] = | |
3032 | (GetDriveType (drive) == DRIVE_FIXED); | |
3033 | ||
3034 | (*drive)++; | |
3035 | } | |
3036 | } | |
480b0c5b GV |
3037 | } |
3038 | ||
3039 | /* end of nt.c */ |