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