Commit | Line | Data |
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e9e23e23 | 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
35f0d482 | 2 | Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
95ed0025 | 3 | |
3b7ad313 EN |
4 | This file is part of GNU Emacs. |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. | |
95ed0025 RS |
20 | |
21 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 | |
22 | */ | |
23 | ||
00b3b7b3 | 24 | |
76b3903d | 25 | #include <stddef.h> /* for offsetof */ |
95ed0025 RS |
26 | #include <stdlib.h> |
27 | #include <stdio.h> | |
28 | #include <io.h> | |
480b0c5b | 29 | #include <errno.h> |
95ed0025 RS |
30 | #include <fcntl.h> |
31 | #include <ctype.h> | |
480b0c5b | 32 | #include <signal.h> |
b3308d2e | 33 | #include <sys/file.h> |
480b0c5b | 34 | #include <sys/time.h> |
16bb7578 | 35 | #include <sys/utime.h> |
480b0c5b GV |
36 | |
37 | /* must include CRT headers *before* config.h */ | |
38 | #include "config.h" | |
39 | #undef access | |
40 | #undef chdir | |
41 | #undef chmod | |
42 | #undef creat | |
43 | #undef ctime | |
44 | #undef fopen | |
45 | #undef link | |
46 | #undef mkdir | |
47 | #undef mktemp | |
48 | #undef open | |
49 | #undef rename | |
50 | #undef rmdir | |
51 | #undef unlink | |
52 | ||
53 | #undef close | |
54 | #undef dup | |
55 | #undef dup2 | |
56 | #undef pipe | |
57 | #undef read | |
58 | #undef write | |
95ed0025 | 59 | |
d8fcc1b9 AI |
60 | #undef strerror |
61 | ||
95ed0025 | 62 | #include "lisp.h" |
95ed0025 RS |
63 | |
64 | #include <pwd.h> | |
65 | ||
480b0c5b | 66 | #include <windows.h> |
00b3b7b3 | 67 | |
480b0c5b GV |
68 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
69 | #include <sys/socket.h> | |
70 | #undef socket | |
71 | #undef bind | |
72 | #undef connect | |
73 | #undef htons | |
74 | #undef ntohs | |
75 | #undef inet_addr | |
76 | #undef gethostname | |
77 | #undef gethostbyname | |
78 | #undef getservbyname | |
380961a6 | 79 | #undef shutdown |
480b0c5b | 80 | #endif |
00b3b7b3 | 81 | |
489f9371 | 82 | #include "w32.h" |
480b0c5b | 83 | #include "ndir.h" |
489f9371 | 84 | #include "w32heap.h" |
76b3903d | 85 | |
03887dd3 KH |
86 | #undef min |
87 | #undef max | |
88 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
89 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
90 | ||
76b3903d GV |
91 | extern Lisp_Object Vw32_downcase_file_names; |
92 | extern Lisp_Object Vw32_generate_fake_inodes; | |
93 | extern Lisp_Object Vw32_get_true_file_attributes; | |
20af4831 | 94 | extern Lisp_Object Vw32_num_mouse_buttons; |
76b3903d GV |
95 | |
96 | static char startup_dir[MAXPATHLEN]; | |
00b3b7b3 | 97 | |
95ed0025 | 98 | /* Get the current working directory. */ |
480b0c5b | 99 | char * |
95ed0025 RS |
100 | getwd (char *dir) |
101 | { | |
76b3903d | 102 | #if 0 |
480b0c5b GV |
103 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
104 | return dir; | |
105 | return NULL; | |
76b3903d GV |
106 | #else |
107 | /* Emacs doesn't actually change directory itself, and we want to | |
108 | force our real wd to be where emacs.exe is to avoid unnecessary | |
109 | conflicts when trying to rename or delete directories. */ | |
110 | strcpy (dir, startup_dir); | |
111 | return dir; | |
112 | #endif | |
95ed0025 RS |
113 | } |
114 | ||
480b0c5b | 115 | #ifndef HAVE_SOCKETS |
95ed0025 RS |
116 | /* Emulate gethostname. */ |
117 | int | |
118 | gethostname (char *buffer, int size) | |
119 | { | |
120 | /* NT only allows small host names, so the buffer is | |
121 | certainly large enough. */ | |
122 | return !GetComputerName (buffer, &size); | |
123 | } | |
480b0c5b | 124 | #endif /* HAVE_SOCKETS */ |
95ed0025 RS |
125 | |
126 | /* Emulate getloadavg. */ | |
127 | int | |
128 | getloadavg (double loadavg[], int nelem) | |
129 | { | |
130 | int i; | |
131 | ||
132 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
133 | for (i = 0; i < nelem; i++) | |
134 | { | |
135 | loadavg[i] = 0.0; | |
136 | } | |
137 | return i; | |
138 | } | |
139 | ||
480b0c5b | 140 | /* Emulate getpwuid, getpwnam and others. */ |
95ed0025 | 141 | |
051fe60d GV |
142 | #define PASSWD_FIELD_SIZE 256 |
143 | ||
144 | static char the_passwd_name[PASSWD_FIELD_SIZE]; | |
145 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; | |
146 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; | |
147 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; | |
148 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; | |
95ed0025 RS |
149 | |
150 | static struct passwd the_passwd = | |
151 | { | |
152 | the_passwd_name, | |
153 | the_passwd_passwd, | |
154 | 0, | |
155 | 0, | |
156 | 0, | |
157 | the_passwd_gecos, | |
158 | the_passwd_dir, | |
159 | the_passwd_shell, | |
160 | }; | |
161 | ||
480b0c5b GV |
162 | int |
163 | getuid () | |
164 | { | |
165 | return the_passwd.pw_uid; | |
166 | } | |
167 | ||
168 | int | |
169 | geteuid () | |
170 | { | |
171 | /* I could imagine arguing for checking to see whether the user is | |
172 | in the Administrators group and returning a UID of 0 for that | |
173 | case, but I don't know how wise that would be in the long run. */ | |
174 | return getuid (); | |
175 | } | |
176 | ||
177 | int | |
178 | getgid () | |
179 | { | |
180 | return the_passwd.pw_gid; | |
181 | } | |
182 | ||
183 | int | |
184 | getegid () | |
185 | { | |
186 | return getgid (); | |
187 | } | |
188 | ||
95ed0025 RS |
189 | struct passwd * |
190 | getpwuid (int uid) | |
191 | { | |
480b0c5b GV |
192 | if (uid == the_passwd.pw_uid) |
193 | return &the_passwd; | |
194 | return NULL; | |
95ed0025 RS |
195 | } |
196 | ||
197 | struct passwd * | |
198 | getpwnam (char *name) | |
199 | { | |
200 | struct passwd *pw; | |
201 | ||
202 | pw = getpwuid (getuid ()); | |
203 | if (!pw) | |
204 | return pw; | |
205 | ||
480b0c5b | 206 | if (stricmp (name, pw->pw_name)) |
95ed0025 RS |
207 | return NULL; |
208 | ||
209 | return pw; | |
210 | } | |
211 | ||
480b0c5b GV |
212 | void |
213 | init_user_info () | |
95ed0025 | 214 | { |
480b0c5b GV |
215 | /* Find the user's real name by opening the process token and |
216 | looking up the name associated with the user-sid in that token. | |
217 | ||
218 | Use the relative portion of the identifier authority value from | |
219 | the user-sid as the user id value (same for group id using the | |
220 | primary group sid from the process token). */ | |
221 | ||
222 | char user_sid[256], name[256], domain[256]; | |
223 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; | |
224 | HANDLE token = NULL; | |
225 | SID_NAME_USE user_type; | |
226 | ||
227 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) | |
228 | && GetTokenInformation (token, TokenUser, | |
229 | (PVOID) user_sid, sizeof (user_sid), &trash) | |
230 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, | |
231 | domain, &dlength, &user_type)) | |
d1c1c3d2 | 232 | { |
480b0c5b GV |
233 | strcpy (the_passwd.pw_name, name); |
234 | /* Determine a reasonable uid value. */ | |
235 | if (stricmp ("administrator", name) == 0) | |
236 | { | |
237 | the_passwd.pw_uid = 0; | |
238 | the_passwd.pw_gid = 0; | |
239 | } | |
240 | else | |
241 | { | |
242 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
243 | ||
244 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
245 | /* I believe the relative portion is the last 4 bytes (of 6) | |
246 | with msb first. */ | |
247 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + | |
248 | (pSIA->Value[3] << 16) + | |
249 | (pSIA->Value[4] << 8) + | |
250 | (pSIA->Value[5] << 0)); | |
251 | /* restrict to conventional uid range for normal users */ | |
252 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; | |
253 | ||
254 | /* Get group id */ | |
255 | if (GetTokenInformation (token, TokenPrimaryGroup, | |
256 | (PVOID) user_sid, sizeof (user_sid), &trash)) | |
257 | { | |
258 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
259 | ||
260 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
261 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + | |
262 | (pSIA->Value[3] << 16) + | |
263 | (pSIA->Value[4] << 8) + | |
264 | (pSIA->Value[5] << 0)); | |
265 | /* I don't know if this is necessary, but for safety... */ | |
266 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; | |
267 | } | |
268 | else | |
269 | the_passwd.pw_gid = the_passwd.pw_uid; | |
270 | } | |
271 | } | |
272 | /* If security calls are not supported (presumably because we | |
273 | are running under Windows 95), fallback to this. */ | |
274 | else if (GetUserName (name, &length)) | |
275 | { | |
276 | strcpy (the_passwd.pw_name, name); | |
277 | if (stricmp ("administrator", name) == 0) | |
278 | the_passwd.pw_uid = 0; | |
279 | else | |
280 | the_passwd.pw_uid = 123; | |
281 | the_passwd.pw_gid = the_passwd.pw_uid; | |
282 | } | |
283 | else | |
284 | { | |
285 | strcpy (the_passwd.pw_name, "unknown"); | |
286 | the_passwd.pw_uid = 123; | |
287 | the_passwd.pw_gid = 123; | |
d1c1c3d2 | 288 | } |
95ed0025 | 289 | |
480b0c5b GV |
290 | /* Ensure HOME and SHELL are defined. */ |
291 | if (getenv ("HOME") == NULL) | |
292 | putenv ("HOME=c:/"); | |
293 | if (getenv ("SHELL") == NULL) | |
76b3903d | 294 | putenv (os_subtype == OS_WIN95 ? "SHELL=command" : "SHELL=cmd"); |
95ed0025 | 295 | |
480b0c5b GV |
296 | /* Set dir and shell from environment variables. */ |
297 | strcpy (the_passwd.pw_dir, getenv ("HOME")); | |
298 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); | |
bd4a449f | 299 | |
480b0c5b GV |
300 | if (token) |
301 | CloseHandle (token); | |
95ed0025 RS |
302 | } |
303 | ||
95ed0025 | 304 | int |
480b0c5b | 305 | random () |
95ed0025 | 306 | { |
480b0c5b GV |
307 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
308 | return ((rand () << 15) | rand ()); | |
95ed0025 RS |
309 | } |
310 | ||
95ed0025 | 311 | void |
480b0c5b | 312 | srandom (int seed) |
95ed0025 | 313 | { |
480b0c5b | 314 | srand (seed); |
95ed0025 RS |
315 | } |
316 | ||
76b3903d | 317 | |
cbe39279 RS |
318 | /* Normalize filename by converting all path separators to |
319 | the specified separator. Also conditionally convert upper | |
320 | case path name components to lower case. */ | |
321 | ||
322 | static void | |
323 | normalize_filename (fp, path_sep) | |
324 | register char *fp; | |
325 | char path_sep; | |
326 | { | |
327 | char sep; | |
328 | char *elem; | |
329 | ||
5162ffce MB |
330 | /* Always lower-case drive letters a-z, even if the filesystem |
331 | preserves case in filenames. | |
332 | This is so filenames can be compared by string comparison | |
333 | functions that are case-sensitive. Even case-preserving filesystems | |
334 | do not distinguish case in drive letters. */ | |
335 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') | |
336 | { | |
337 | *fp += 'a' - 'A'; | |
338 | fp += 2; | |
339 | } | |
340 | ||
fbd6baed | 341 | if (NILP (Vw32_downcase_file_names)) |
cbe39279 RS |
342 | { |
343 | while (*fp) | |
344 | { | |
345 | if (*fp == '/' || *fp == '\\') | |
346 | *fp = path_sep; | |
347 | fp++; | |
348 | } | |
349 | return; | |
350 | } | |
351 | ||
352 | sep = path_sep; /* convert to this path separator */ | |
353 | elem = fp; /* start of current path element */ | |
354 | ||
355 | do { | |
356 | if (*fp >= 'a' && *fp <= 'z') | |
357 | elem = 0; /* don't convert this element */ | |
358 | ||
359 | if (*fp == 0 || *fp == ':') | |
360 | { | |
361 | sep = *fp; /* restore current separator (or 0) */ | |
362 | *fp = '/'; /* after conversion of this element */ | |
363 | } | |
364 | ||
365 | if (*fp == '/' || *fp == '\\') | |
366 | { | |
367 | if (elem && elem != fp) | |
368 | { | |
369 | *fp = 0; /* temporary end of string */ | |
370 | _strlwr (elem); /* while we convert to lower case */ | |
371 | } | |
372 | *fp = sep; /* convert (or restore) path separator */ | |
373 | elem = fp + 1; /* next element starts after separator */ | |
374 | sep = path_sep; | |
375 | } | |
376 | } while (*fp++); | |
377 | } | |
378 | ||
480b0c5b | 379 | /* Destructively turn backslashes into slashes. */ |
95ed0025 | 380 | void |
480b0c5b GV |
381 | dostounix_filename (p) |
382 | register char *p; | |
95ed0025 | 383 | { |
cbe39279 | 384 | normalize_filename (p, '/'); |
95ed0025 RS |
385 | } |
386 | ||
480b0c5b | 387 | /* Destructively turn slashes into backslashes. */ |
95ed0025 | 388 | void |
480b0c5b GV |
389 | unixtodos_filename (p) |
390 | register char *p; | |
95ed0025 | 391 | { |
cbe39279 | 392 | normalize_filename (p, '\\'); |
95ed0025 RS |
393 | } |
394 | ||
480b0c5b GV |
395 | /* Remove all CR's that are followed by a LF. |
396 | (From msdos.c...probably should figure out a way to share it, | |
397 | although this code isn't going to ever change.) */ | |
35f0d482 | 398 | int |
480b0c5b GV |
399 | crlf_to_lf (n, buf) |
400 | register int n; | |
401 | register unsigned char *buf; | |
35f0d482 | 402 | { |
480b0c5b GV |
403 | unsigned char *np = buf; |
404 | unsigned char *startp = buf; | |
405 | unsigned char *endp = buf + n; | |
35f0d482 | 406 | |
480b0c5b GV |
407 | if (n == 0) |
408 | return n; | |
409 | while (buf < endp - 1) | |
95ed0025 | 410 | { |
480b0c5b GV |
411 | if (*buf == 0x0d) |
412 | { | |
413 | if (*(++buf) != 0x0a) | |
414 | *np++ = 0x0d; | |
415 | } | |
416 | else | |
417 | *np++ = *buf++; | |
95ed0025 | 418 | } |
480b0c5b GV |
419 | if (buf < endp) |
420 | *np++ = *buf++; | |
421 | return np - startp; | |
95ed0025 RS |
422 | } |
423 | ||
76b3903d GV |
424 | /* Parse the root part of file name, if present. Return length and |
425 | optionally store pointer to char after root. */ | |
426 | static int | |
427 | parse_root (char * name, char ** pPath) | |
428 | { | |
429 | char * start = name; | |
430 | ||
431 | if (name == NULL) | |
432 | return 0; | |
433 | ||
434 | /* find the root name of the volume if given */ | |
435 | if (isalpha (name[0]) && name[1] == ':') | |
436 | { | |
437 | /* skip past drive specifier */ | |
438 | name += 2; | |
439 | if (IS_DIRECTORY_SEP (name[0])) | |
440 | name++; | |
441 | } | |
442 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
443 | { | |
444 | int slashes = 2; | |
445 | name += 2; | |
446 | do | |
447 | { | |
448 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
449 | break; | |
450 | name++; | |
451 | } | |
452 | while ( *name ); | |
453 | if (IS_DIRECTORY_SEP (name[0])) | |
454 | name++; | |
455 | } | |
456 | ||
457 | if (pPath) | |
458 | *pPath = name; | |
459 | ||
460 | return name - start; | |
461 | } | |
462 | ||
463 | /* Get long base name for name; name is assumed to be absolute. */ | |
464 | static int | |
465 | get_long_basename (char * name, char * buf, int size) | |
466 | { | |
467 | WIN32_FIND_DATA find_data; | |
468 | HANDLE dir_handle; | |
469 | int len = 0; | |
470 | ||
9ab8560d | 471 | /* must be valid filename, no wild cards or other invalid characters */ |
bb1584c8 RS |
472 | if (strpbrk (name, "*?|<>\"")) |
473 | return 0; | |
474 | ||
76b3903d GV |
475 | dir_handle = FindFirstFile (name, &find_data); |
476 | if (dir_handle != INVALID_HANDLE_VALUE) | |
477 | { | |
478 | if ((len = strlen (find_data.cFileName)) < size) | |
479 | memcpy (buf, find_data.cFileName, len + 1); | |
480 | else | |
481 | len = 0; | |
482 | FindClose (dir_handle); | |
483 | } | |
484 | return len; | |
485 | } | |
486 | ||
487 | /* Get long name for file, if possible (assumed to be absolute). */ | |
488 | BOOL | |
489 | w32_get_long_filename (char * name, char * buf, int size) | |
490 | { | |
491 | char * o = buf; | |
492 | char * p; | |
493 | char * q; | |
494 | char full[ MAX_PATH ]; | |
495 | int len; | |
496 | ||
497 | len = strlen (name); | |
498 | if (len >= MAX_PATH) | |
499 | return FALSE; | |
500 | ||
501 | /* Use local copy for destructive modification. */ | |
502 | memcpy (full, name, len+1); | |
503 | unixtodos_filename (full); | |
504 | ||
505 | /* Copy root part verbatim. */ | |
506 | len = parse_root (full, &p); | |
507 | memcpy (o, full, len); | |
508 | o += len; | |
4f8ac0b2 | 509 | *o = '\0'; |
76b3903d GV |
510 | size -= len; |
511 | ||
4f8ac0b2 | 512 | while (p != NULL && *p) |
76b3903d GV |
513 | { |
514 | q = p; | |
515 | p = strchr (q, '\\'); | |
516 | if (p) *p = '\0'; | |
517 | len = get_long_basename (full, o, size); | |
518 | if (len > 0) | |
519 | { | |
520 | o += len; | |
521 | size -= len; | |
522 | if (p != NULL) | |
523 | { | |
524 | *p++ = '\\'; | |
525 | if (size < 2) | |
526 | return FALSE; | |
527 | *o++ = '\\'; | |
528 | size--; | |
529 | *o = '\0'; | |
530 | } | |
531 | } | |
532 | else | |
533 | return FALSE; | |
534 | } | |
76b3903d GV |
535 | |
536 | return TRUE; | |
537 | } | |
538 | ||
9d3355d1 GV |
539 | int |
540 | is_unc_volume (const char *filename) | |
541 | { | |
542 | const char *ptr = filename; | |
543 | ||
544 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) | |
545 | return 0; | |
546 | ||
547 | if (strpbrk (ptr + 2, "*?|<>\"\\/")) | |
548 | return 0; | |
549 | ||
550 | return 1; | |
551 | } | |
76b3903d | 552 | |
95ed0025 RS |
553 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
554 | ||
95ed0025 RS |
555 | int |
556 | sigsetmask (int signal_mask) | |
557 | { | |
558 | return 0; | |
559 | } | |
560 | ||
8f900f6e AI |
561 | int |
562 | sigmask (int sig) | |
563 | { | |
564 | return 0; | |
565 | } | |
566 | ||
95ed0025 RS |
567 | int |
568 | sigblock (int sig) | |
569 | { | |
570 | return 0; | |
571 | } | |
572 | ||
8f900f6e AI |
573 | int |
574 | sigunblock (int sig) | |
575 | { | |
576 | return 0; | |
577 | } | |
578 | ||
95ed0025 RS |
579 | int |
580 | setpgrp (int pid, int gid) | |
581 | { | |
582 | return 0; | |
583 | } | |
584 | ||
585 | int | |
586 | alarm (int seconds) | |
587 | { | |
588 | return 0; | |
589 | } | |
590 | ||
c6624584 | 591 | void |
95ed0025 RS |
592 | unrequest_sigio (void) |
593 | { | |
c6624584 | 594 | return; |
95ed0025 RS |
595 | } |
596 | ||
c6624584 | 597 | void |
95ed0025 RS |
598 | request_sigio (void) |
599 | { | |
c6624584 | 600 | return; |
95ed0025 RS |
601 | } |
602 | ||
480b0c5b | 603 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
f332b293 GV |
604 | |
605 | LPBYTE | |
fbd6baed | 606 | w32_get_resource (key, lpdwtype) |
f332b293 GV |
607 | char *key; |
608 | LPDWORD lpdwtype; | |
609 | { | |
610 | LPBYTE lpvalue; | |
611 | HKEY hrootkey = NULL; | |
612 | DWORD cbData; | |
613 | BOOL ok = FALSE; | |
614 | ||
615 | /* Check both the current user and the local machine to see if | |
616 | we have any resources. */ | |
617 | ||
618 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
619 | { | |
620 | lpvalue = NULL; | |
621 | ||
622 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS | |
623 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
624 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
625 | { | |
626 | return (lpvalue); | |
627 | } | |
628 | ||
629 | if (lpvalue) xfree (lpvalue); | |
630 | ||
631 | RegCloseKey (hrootkey); | |
632 | } | |
633 | ||
634 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
635 | { | |
636 | lpvalue = NULL; | |
637 | ||
76b3903d GV |
638 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
639 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
640 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
f332b293 GV |
641 | { |
642 | return (lpvalue); | |
643 | } | |
644 | ||
645 | if (lpvalue) xfree (lpvalue); | |
646 | ||
647 | RegCloseKey (hrootkey); | |
648 | } | |
649 | ||
650 | return (NULL); | |
651 | } | |
652 | ||
75b08edb GV |
653 | char *get_emacs_configuration (void); |
654 | extern Lisp_Object Vsystem_configuration; | |
655 | ||
f332b293 | 656 | void |
aa7b87b0 | 657 | init_environment (char ** argv) |
f332b293 | 658 | { |
b3308d2e KH |
659 | int len; |
660 | static const char * const tempdirs[] = { | |
661 | "$TMPDIR", "$TEMP", "$TMP", "c:/" | |
662 | }; | |
663 | int i; | |
664 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); | |
665 | ||
666 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use | |
667 | temporary files and assume "/tmp" if $TMPDIR is unset, which | |
668 | will break on DOS/Windows. Refuse to work if we cannot find | |
669 | a directory, not even "c:/", usable for that purpose. */ | |
670 | for (i = 0; i < imax ; i++) | |
671 | { | |
672 | const char *tmp = tempdirs[i]; | |
673 | ||
674 | if (*tmp == '$') | |
675 | tmp = getenv (tmp + 1); | |
676 | /* Note that `access' can lie to us if the directory resides on a | |
677 | read-only filesystem, like CD-ROM or a write-protected floppy. | |
678 | The only way to be really sure is to actually create a file and | |
679 | see if it succeeds. But I think that's too much to ask. */ | |
680 | if (tmp && access (tmp, D_OK) == 0) | |
681 | { | |
682 | char * var = alloca (strlen (tmp) + 8); | |
683 | sprintf (var, "TMPDIR=%s", tmp); | |
684 | putenv (var); | |
685 | break; | |
686 | } | |
687 | } | |
688 | if (i >= imax) | |
689 | cmd_error_internal | |
690 | (Fcons (Qerror, | |
691 | Fcons (build_string ("no usable temporary directories found!!"), | |
692 | Qnil)), | |
693 | "While setting TMPDIR: "); | |
694 | ||
f332b293 GV |
695 | /* Check for environment variables and use registry if they don't exist */ |
696 | { | |
480b0c5b GV |
697 | int i; |
698 | LPBYTE lpval; | |
699 | DWORD dwType; | |
f332b293 | 700 | |
480b0c5b GV |
701 | static char * env_vars[] = |
702 | { | |
703 | "HOME", | |
f249a012 | 704 | "PRELOAD_WINSOCK", |
480b0c5b GV |
705 | "emacs_dir", |
706 | "EMACSLOADPATH", | |
707 | "SHELL", | |
76b3903d | 708 | "CMDPROXY", |
480b0c5b GV |
709 | "EMACSDATA", |
710 | "EMACSPATH", | |
711 | "EMACSLOCKDIR", | |
76b3903d GV |
712 | /* We no longer set INFOPATH because Info-default-directory-list |
713 | is then ignored. We use a hook in winnt.el instead. */ | |
714 | /* "INFOPATH", */ | |
480b0c5b GV |
715 | "EMACSDOC", |
716 | "TERM", | |
717 | }; | |
718 | ||
719 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) | |
f332b293 | 720 | { |
76b3903d GV |
721 | if (!getenv (env_vars[i]) |
722 | && (lpval = w32_get_resource (env_vars[i], &dwType)) != NULL) | |
480b0c5b GV |
723 | { |
724 | if (dwType == REG_EXPAND_SZ) | |
725 | { | |
726 | char buf1[500], buf2[500]; | |
727 | ||
728 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, 500); | |
729 | _snprintf (buf2, 499, "%s=%s", env_vars[i], buf1); | |
730 | putenv (strdup (buf2)); | |
731 | } | |
732 | else if (dwType == REG_SZ) | |
733 | { | |
734 | char buf[500]; | |
f332b293 | 735 | |
480b0c5b GV |
736 | _snprintf (buf, 499, "%s=%s", env_vars[i], lpval); |
737 | putenv (strdup (buf)); | |
738 | } | |
f332b293 | 739 | |
480b0c5b GV |
740 | xfree (lpval); |
741 | } | |
742 | } | |
743 | } | |
744 | ||
75b08edb GV |
745 | /* Rebuild system configuration to reflect invoking system. */ |
746 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); | |
747 | ||
76b3903d GV |
748 | /* Another special case: on NT, the PATH variable is actually named |
749 | "Path" although cmd.exe (perhaps NT itself) arranges for | |
750 | environment variable lookup and setting to be case insensitive. | |
751 | However, Emacs assumes a fully case sensitive environment, so we | |
752 | need to change "Path" to "PATH" to match the expectations of | |
753 | various elisp packages. We do this by the sneaky method of | |
754 | modifying the string in the C runtime environ entry. | |
755 | ||
756 | The same applies to COMSPEC. */ | |
757 | { | |
758 | char ** envp; | |
759 | ||
760 | for (envp = environ; *envp; envp++) | |
761 | if (_strnicmp (*envp, "PATH=", 5) == 0) | |
762 | memcpy (*envp, "PATH=", 5); | |
763 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) | |
764 | memcpy (*envp, "COMSPEC=", 8); | |
765 | } | |
766 | ||
767 | /* Remember the initial working directory for getwd, then make the | |
768 | real wd be the location of emacs.exe to avoid conflicts when | |
769 | renaming or deleting directories. (We also don't call chdir when | |
770 | running subprocesses for the same reason.) */ | |
771 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) | |
772 | abort (); | |
773 | ||
774 | { | |
775 | char *p; | |
aa7b87b0 | 776 | static char modname[MAX_PATH]; |
76b3903d GV |
777 | |
778 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) | |
779 | abort (); | |
780 | if ((p = strrchr (modname, '\\')) == NULL) | |
781 | abort (); | |
782 | *p = 0; | |
783 | ||
784 | SetCurrentDirectory (modname); | |
aa7b87b0 AI |
785 | |
786 | /* Ensure argv[0] has the full path to Emacs. */ | |
787 | *p = '\\'; | |
788 | argv[0] = modname; | |
76b3903d GV |
789 | } |
790 | ||
20af4831 JR |
791 | /* Determine if there is a middle mouse button, to allow parse_button |
792 | to decide whether right mouse events should be mouse-2 or | |
793 | mouse-3. */ | |
794 | XSETINT (Vw32_num_mouse_buttons, GetSystemMetrics (SM_CMOUSEBUTTONS)); | |
795 | ||
480b0c5b GV |
796 | init_user_info (); |
797 | } | |
798 | ||
799 | /* We don't have scripts to automatically determine the system configuration | |
800 | for Emacs before it's compiled, and we don't want to have to make the | |
801 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime | |
802 | routine. */ | |
803 | ||
804 | static char configuration_buffer[32]; | |
805 | ||
806 | char * | |
807 | get_emacs_configuration (void) | |
808 | { | |
809 | char *arch, *oem, *os; | |
c5247da2 | 810 | int build_num; |
480b0c5b GV |
811 | |
812 | /* Determine the processor type. */ | |
813 | switch (get_processor_type ()) | |
814 | { | |
815 | ||
816 | #ifdef PROCESSOR_INTEL_386 | |
817 | case PROCESSOR_INTEL_386: | |
818 | case PROCESSOR_INTEL_486: | |
819 | case PROCESSOR_INTEL_PENTIUM: | |
820 | arch = "i386"; | |
821 | break; | |
822 | #endif | |
823 | ||
824 | #ifdef PROCESSOR_INTEL_860 | |
825 | case PROCESSOR_INTEL_860: | |
826 | arch = "i860"; | |
827 | break; | |
828 | #endif | |
829 | ||
830 | #ifdef PROCESSOR_MIPS_R2000 | |
831 | case PROCESSOR_MIPS_R2000: | |
832 | case PROCESSOR_MIPS_R3000: | |
833 | case PROCESSOR_MIPS_R4000: | |
834 | arch = "mips"; | |
835 | break; | |
836 | #endif | |
837 | ||
838 | #ifdef PROCESSOR_ALPHA_21064 | |
839 | case PROCESSOR_ALPHA_21064: | |
840 | arch = "alpha"; | |
841 | break; | |
842 | #endif | |
843 | ||
844 | default: | |
845 | arch = "unknown"; | |
846 | break; | |
f332b293 | 847 | } |
480b0c5b GV |
848 | |
849 | /* Let oem be "*" until we figure out how to decode the OEM field. */ | |
850 | oem = "*"; | |
851 | ||
c5247da2 GV |
852 | switch (osinfo_cache.dwPlatformId) { |
853 | case VER_PLATFORM_WIN32_NT: | |
854 | os = "nt"; | |
855 | build_num = osinfo_cache.dwBuildNumber; | |
856 | break; | |
857 | case VER_PLATFORM_WIN32_WINDOWS: | |
858 | if (osinfo_cache.dwMinorVersion == 0) { | |
859 | os = "windows95"; | |
860 | } else { | |
861 | os = "windows98"; | |
862 | } | |
863 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
864 | break; | |
865 | case VER_PLATFORM_WIN32s: | |
866 | /* Not supported, should not happen. */ | |
867 | os = "windows32s"; | |
868 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
869 | break; | |
870 | default: | |
871 | os = "unknown"; | |
872 | build_num = 0; | |
873 | break; | |
874 | } | |
875 | ||
876 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { | |
877 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, | |
878 | get_w32_major_version (), get_w32_minor_version (), build_num); | |
879 | } else { | |
880 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); | |
881 | } | |
480b0c5b | 882 | |
480b0c5b | 883 | return configuration_buffer; |
f332b293 GV |
884 | } |
885 | ||
35f0d482 KH |
886 | #include <sys/timeb.h> |
887 | ||
888 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ | |
889 | void | |
890 | gettimeofday (struct timeval *tv, struct timezone *tz) | |
891 | { | |
892 | struct _timeb tb; | |
893 | _ftime (&tb); | |
894 | ||
895 | tv->tv_sec = tb.time; | |
896 | tv->tv_usec = tb.millitm * 1000L; | |
897 | if (tz) | |
898 | { | |
899 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ | |
900 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ | |
901 | } | |
902 | } | |
35f0d482 | 903 | |
480b0c5b | 904 | /* ------------------------------------------------------------------------- */ |
fbd6baed | 905 | /* IO support and wrapper functions for W32 API. */ |
480b0c5b | 906 | /* ------------------------------------------------------------------------- */ |
95ed0025 | 907 | |
480b0c5b GV |
908 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
909 | on network directories, so we handle that case here. | |
910 | (Ulrich Leodolter, 1/11/95). */ | |
911 | char * | |
912 | sys_ctime (const time_t *t) | |
913 | { | |
914 | char *str = (char *) ctime (t); | |
915 | return (str ? str : "Sun Jan 01 00:00:00 1970"); | |
916 | } | |
917 | ||
918 | /* Emulate sleep...we could have done this with a define, but that | |
919 | would necessitate including windows.h in the files that used it. | |
920 | This is much easier. */ | |
921 | void | |
922 | sys_sleep (int seconds) | |
923 | { | |
924 | Sleep (seconds * 1000); | |
925 | } | |
926 | ||
76b3903d | 927 | /* Internal MSVC functions for low-level descriptor munging */ |
480b0c5b GV |
928 | extern int __cdecl _set_osfhnd (int fd, long h); |
929 | extern int __cdecl _free_osfhnd (int fd); | |
930 | ||
931 | /* parallel array of private info on file handles */ | |
932 | filedesc fd_info [ MAXDESC ]; | |
933 | ||
76b3903d GV |
934 | typedef struct volume_info_data { |
935 | struct volume_info_data * next; | |
936 | ||
937 | /* time when info was obtained */ | |
938 | DWORD timestamp; | |
939 | ||
940 | /* actual volume info */ | |
941 | char * root_dir; | |
480b0c5b GV |
942 | DWORD serialnum; |
943 | DWORD maxcomp; | |
944 | DWORD flags; | |
76b3903d GV |
945 | char * name; |
946 | char * type; | |
947 | } volume_info_data; | |
948 | ||
949 | /* Global referenced by various functions. */ | |
950 | static volume_info_data volume_info; | |
951 | ||
952 | /* Vector to indicate which drives are local and fixed (for which cached | |
953 | data never expires). */ | |
954 | static BOOL fixed_drives[26]; | |
955 | ||
956 | /* Consider cached volume information to be stale if older than 10s, | |
957 | at least for non-local drives. Info for fixed drives is never stale. */ | |
958 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) | |
959 | #define VOLINFO_STILL_VALID( root_dir, info ) \ | |
960 | ( ( isalpha (root_dir[0]) && \ | |
961 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ | |
962 | || GetTickCount () - info->timestamp < 10000 ) | |
963 | ||
964 | /* Cache support functions. */ | |
965 | ||
966 | /* Simple linked list with linear search is sufficient. */ | |
967 | static volume_info_data *volume_cache = NULL; | |
968 | ||
969 | static volume_info_data * | |
970 | lookup_volume_info (char * root_dir) | |
971 | { | |
972 | volume_info_data * info; | |
973 | ||
974 | for (info = volume_cache; info; info = info->next) | |
975 | if (stricmp (info->root_dir, root_dir) == 0) | |
976 | break; | |
977 | return info; | |
978 | } | |
979 | ||
980 | static void | |
981 | add_volume_info (char * root_dir, volume_info_data * info) | |
982 | { | |
983 | info->root_dir = strdup (root_dir); | |
984 | info->next = volume_cache; | |
985 | volume_cache = info; | |
986 | } | |
987 | ||
988 | ||
989 | /* Wrapper for GetVolumeInformation, which uses caching to avoid | |
990 | performance penalty (~2ms on 486 for local drives, 7.5ms for local | |
991 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ | |
992 | volume_info_data * | |
993 | GetCachedVolumeInformation (char * root_dir) | |
994 | { | |
995 | volume_info_data * info; | |
996 | char default_root[ MAX_PATH ]; | |
997 | ||
998 | /* NULL for root_dir means use root from current directory. */ | |
999 | if (root_dir == NULL) | |
1000 | { | |
1001 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) | |
1002 | return NULL; | |
1003 | parse_root (default_root, &root_dir); | |
1004 | *root_dir = 0; | |
1005 | root_dir = default_root; | |
1006 | } | |
1007 | ||
1008 | /* Local fixed drives can be cached permanently. Removable drives | |
1009 | cannot be cached permanently, since the volume name and serial | |
1010 | number (if nothing else) can change. Remote drives should be | |
1011 | treated as if they are removable, since there is no sure way to | |
1012 | tell whether they are or not. Also, the UNC association of drive | |
1013 | letters mapped to remote volumes can be changed at any time (even | |
1014 | by other processes) without notice. | |
1015 | ||
1016 | As a compromise, so we can benefit from caching info for remote | |
1017 | volumes, we use a simple expiry mechanism to invalidate cache | |
1018 | entries that are more than ten seconds old. */ | |
1019 | ||
1020 | #if 0 | |
1021 | /* No point doing this, because WNetGetConnection is even slower than | |
1022 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, | |
1023 | GetDriveType is about the only call of this type which does not | |
1024 | involve network access, and so is extremely quick). */ | |
1025 | ||
1026 | /* Map drive letter to UNC if remote. */ | |
1027 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) | |
1028 | { | |
1029 | char remote_name[ 256 ]; | |
1030 | char drive[3] = { root_dir[0], ':' }; | |
1031 | ||
1032 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) | |
1033 | == NO_ERROR) | |
1034 | /* do something */ ; | |
1035 | } | |
1036 | #endif | |
1037 | ||
1038 | info = lookup_volume_info (root_dir); | |
1039 | ||
1040 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) | |
1041 | { | |
1042 | char name[ 256 ]; | |
1043 | DWORD serialnum; | |
1044 | DWORD maxcomp; | |
1045 | DWORD flags; | |
1046 | char type[ 256 ]; | |
1047 | ||
1048 | /* Info is not cached, or is stale. */ | |
1049 | if (!GetVolumeInformation (root_dir, | |
1050 | name, sizeof (name), | |
1051 | &serialnum, | |
1052 | &maxcomp, | |
1053 | &flags, | |
1054 | type, sizeof (type))) | |
1055 | return NULL; | |
1056 | ||
1057 | /* Cache the volume information for future use, overwriting existing | |
1058 | entry if present. */ | |
1059 | if (info == NULL) | |
1060 | { | |
1061 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); | |
1062 | add_volume_info (root_dir, info); | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | free (info->name); | |
1067 | free (info->type); | |
1068 | } | |
1069 | ||
1070 | info->name = strdup (name); | |
1071 | info->serialnum = serialnum; | |
1072 | info->maxcomp = maxcomp; | |
1073 | info->flags = flags; | |
1074 | info->type = strdup (type); | |
1075 | info->timestamp = GetTickCount (); | |
1076 | } | |
1077 | ||
1078 | return info; | |
1079 | } | |
480b0c5b GV |
1080 | |
1081 | /* Get information on the volume where name is held; set path pointer to | |
1082 | start of pathname in name (past UNC header\volume header if present). */ | |
1083 | int | |
1084 | get_volume_info (const char * name, const char ** pPath) | |
95ed0025 | 1085 | { |
480b0c5b GV |
1086 | char temp[MAX_PATH]; |
1087 | char *rootname = NULL; /* default to current volume */ | |
76b3903d | 1088 | volume_info_data * info; |
480b0c5b GV |
1089 | |
1090 | if (name == NULL) | |
1091 | return FALSE; | |
1092 | ||
1093 | /* find the root name of the volume if given */ | |
1094 | if (isalpha (name[0]) && name[1] == ':') | |
1095 | { | |
1096 | rootname = temp; | |
1097 | temp[0] = *name++; | |
1098 | temp[1] = *name++; | |
1099 | temp[2] = '\\'; | |
1100 | temp[3] = 0; | |
1101 | } | |
1102 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
95ed0025 | 1103 | { |
480b0c5b GV |
1104 | char *str = temp; |
1105 | int slashes = 4; | |
1106 | rootname = temp; | |
1107 | do | |
1108 | { | |
1109 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
1110 | break; | |
1111 | *str++ = *name++; | |
1112 | } | |
1113 | while ( *name ); | |
1114 | ||
480b0c5b GV |
1115 | *str++ = '\\'; |
1116 | *str = 0; | |
95ed0025 | 1117 | } |
480b0c5b GV |
1118 | |
1119 | if (pPath) | |
1120 | *pPath = name; | |
1121 | ||
76b3903d GV |
1122 | info = GetCachedVolumeInformation (rootname); |
1123 | if (info != NULL) | |
95ed0025 | 1124 | { |
76b3903d GV |
1125 | /* Set global referenced by other functions. */ |
1126 | volume_info = *info; | |
480b0c5b | 1127 | return TRUE; |
95ed0025 | 1128 | } |
480b0c5b GV |
1129 | return FALSE; |
1130 | } | |
1131 | ||
1132 | /* Determine if volume is FAT format (ie. only supports short 8.3 | |
1133 | names); also set path pointer to start of pathname in name. */ | |
1134 | int | |
1135 | is_fat_volume (const char * name, const char ** pPath) | |
1136 | { | |
1137 | if (get_volume_info (name, pPath)) | |
1138 | return (volume_info.maxcomp == 12); | |
1139 | return FALSE; | |
1140 | } | |
1141 | ||
1142 | /* Map filename to a legal 8.3 name if necessary. */ | |
1143 | const char * | |
fbd6baed | 1144 | map_w32_filename (const char * name, const char ** pPath) |
480b0c5b GV |
1145 | { |
1146 | static char shortname[MAX_PATH]; | |
1147 | char * str = shortname; | |
1148 | char c; | |
480b0c5b | 1149 | char * path; |
76b3903d | 1150 | const char * save_name = name; |
480b0c5b GV |
1151 | |
1152 | if (is_fat_volume (name, &path)) /* truncate to 8.3 */ | |
95ed0025 | 1153 | { |
480b0c5b GV |
1154 | register int left = 8; /* maximum number of chars in part */ |
1155 | register int extn = 0; /* extension added? */ | |
1156 | register int dots = 2; /* maximum number of dots allowed */ | |
1157 | ||
1158 | while (name < path) | |
1159 | *str++ = *name++; /* skip past UNC header */ | |
1160 | ||
1161 | while ((c = *name++)) | |
1162 | { | |
1163 | switch ( c ) | |
1164 | { | |
1165 | case '\\': | |
1166 | case '/': | |
1167 | *str++ = '\\'; | |
1168 | extn = 0; /* reset extension flags */ | |
1169 | dots = 2; /* max 2 dots */ | |
1170 | left = 8; /* max length 8 for main part */ | |
1171 | break; | |
1172 | case ':': | |
1173 | *str++ = ':'; | |
1174 | extn = 0; /* reset extension flags */ | |
1175 | dots = 2; /* max 2 dots */ | |
1176 | left = 8; /* max length 8 for main part */ | |
1177 | break; | |
1178 | case '.': | |
1179 | if ( dots ) | |
1180 | { | |
1181 | /* Convert path components of the form .xxx to _xxx, | |
1182 | but leave . and .. as they are. This allows .emacs | |
1183 | to be read as _emacs, for example. */ | |
1184 | ||
1185 | if (! *name || | |
1186 | *name == '.' || | |
1187 | IS_DIRECTORY_SEP (*name)) | |
1188 | { | |
1189 | *str++ = '.'; | |
1190 | dots--; | |
1191 | } | |
1192 | else | |
1193 | { | |
1194 | *str++ = '_'; | |
1195 | left--; | |
1196 | dots = 0; | |
1197 | } | |
1198 | } | |
1199 | else if ( !extn ) | |
1200 | { | |
1201 | *str++ = '.'; | |
1202 | extn = 1; /* we've got an extension */ | |
1203 | left = 3; /* 3 chars in extension */ | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | /* any embedded dots after the first are converted to _ */ | |
1208 | *str++ = '_'; | |
1209 | } | |
1210 | break; | |
1211 | case '~': | |
1212 | case '#': /* don't lose these, they're important */ | |
1213 | if ( ! left ) | |
1214 | str[-1] = c; /* replace last character of part */ | |
1215 | /* FALLTHRU */ | |
1216 | default: | |
1217 | if ( left ) | |
1218 | { | |
1219 | *str++ = tolower (c); /* map to lower case (looks nicer) */ | |
1220 | left--; | |
1221 | dots = 0; /* started a path component */ | |
1222 | } | |
1223 | break; | |
1224 | } | |
1225 | } | |
1226 | *str = '\0'; | |
fc85cb29 RS |
1227 | } |
1228 | else | |
1229 | { | |
1230 | strcpy (shortname, name); | |
1231 | unixtodos_filename (shortname); | |
95ed0025 | 1232 | } |
480b0c5b GV |
1233 | |
1234 | if (pPath) | |
76b3903d | 1235 | *pPath = shortname + (path - save_name); |
480b0c5b | 1236 | |
fc85cb29 | 1237 | return shortname; |
480b0c5b GV |
1238 | } |
1239 | ||
b3308d2e KH |
1240 | static int |
1241 | is_exec (const char * name) | |
1242 | { | |
1243 | char * p = strrchr (name, '.'); | |
1244 | return | |
1245 | (p != NULL | |
1246 | && (stricmp (p, ".exe") == 0 || | |
1247 | stricmp (p, ".com") == 0 || | |
1248 | stricmp (p, ".bat") == 0 || | |
1249 | stricmp (p, ".cmd") == 0)); | |
1250 | } | |
1251 | ||
76b3903d GV |
1252 | /* Emulate the Unix directory procedures opendir, closedir, |
1253 | and readdir. We can't use the procedures supplied in sysdep.c, | |
1254 | so we provide them here. */ | |
1255 | ||
1256 | struct direct dir_static; /* simulated directory contents */ | |
1257 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; | |
1258 | static int dir_is_fat; | |
1259 | static char dir_pathname[MAXPATHLEN+1]; | |
1260 | static WIN32_FIND_DATA dir_find_data; | |
1261 | ||
9d3355d1 GV |
1262 | /* Support shares on a network resource as subdirectories of a read-only |
1263 | root directory. */ | |
1264 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1265 | HANDLE open_unc_volume (char *); | |
1266 | char *read_unc_volume (HANDLE, char *, int); | |
1267 | void close_unc_volume (HANDLE); | |
1268 | ||
76b3903d GV |
1269 | DIR * |
1270 | opendir (char *filename) | |
1271 | { | |
1272 | DIR *dirp; | |
1273 | ||
1274 | /* Opening is done by FindFirstFile. However, a read is inherent to | |
1275 | this operation, so we defer the open until read time. */ | |
1276 | ||
76b3903d GV |
1277 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
1278 | return NULL; | |
9d3355d1 GV |
1279 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1280 | return NULL; | |
1281 | ||
1282 | if (is_unc_volume (filename)) | |
1283 | { | |
1284 | wnet_enum_handle = open_unc_volume (filename); | |
1285 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) | |
1286 | return NULL; | |
1287 | } | |
1288 | ||
1289 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) | |
1290 | return NULL; | |
76b3903d GV |
1291 | |
1292 | dirp->dd_fd = 0; | |
1293 | dirp->dd_loc = 0; | |
1294 | dirp->dd_size = 0; | |
1295 | ||
1296 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); | |
1297 | dir_pathname[MAXPATHLEN] = '\0'; | |
1298 | dir_is_fat = is_fat_volume (filename, NULL); | |
1299 | ||
1300 | return dirp; | |
1301 | } | |
1302 | ||
1303 | void | |
1304 | closedir (DIR *dirp) | |
1305 | { | |
1306 | /* If we have a find-handle open, close it. */ | |
1307 | if (dir_find_handle != INVALID_HANDLE_VALUE) | |
1308 | { | |
1309 | FindClose (dir_find_handle); | |
1310 | dir_find_handle = INVALID_HANDLE_VALUE; | |
1311 | } | |
9d3355d1 GV |
1312 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1313 | { | |
1314 | close_unc_volume (wnet_enum_handle); | |
1315 | wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1316 | } | |
76b3903d GV |
1317 | xfree ((char *) dirp); |
1318 | } | |
1319 | ||
1320 | struct direct * | |
1321 | readdir (DIR *dirp) | |
1322 | { | |
9d3355d1 GV |
1323 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1324 | { | |
1325 | if (!read_unc_volume (wnet_enum_handle, | |
1326 | dir_find_data.cFileName, | |
1327 | MAX_PATH)) | |
1328 | return NULL; | |
1329 | } | |
76b3903d | 1330 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
9d3355d1 | 1331 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
76b3903d GV |
1332 | { |
1333 | char filename[MAXNAMLEN + 3]; | |
1334 | int ln; | |
1335 | ||
1336 | strcpy (filename, dir_pathname); | |
1337 | ln = strlen (filename) - 1; | |
1338 | if (!IS_DIRECTORY_SEP (filename[ln])) | |
1339 | strcat (filename, "\\"); | |
1340 | strcat (filename, "*"); | |
1341 | ||
1342 | dir_find_handle = FindFirstFile (filename, &dir_find_data); | |
1343 | ||
1344 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
1345 | return NULL; | |
1346 | } | |
1347 | else | |
1348 | { | |
1349 | if (!FindNextFile (dir_find_handle, &dir_find_data)) | |
1350 | return NULL; | |
1351 | } | |
1352 | ||
1353 | /* Emacs never uses this value, so don't bother making it match | |
1354 | value returned by stat(). */ | |
1355 | dir_static.d_ino = 1; | |
1356 | ||
1357 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + | |
1358 | dir_static.d_namlen - dir_static.d_namlen % 4; | |
1359 | ||
1360 | dir_static.d_namlen = strlen (dir_find_data.cFileName); | |
1361 | strcpy (dir_static.d_name, dir_find_data.cFileName); | |
1362 | if (dir_is_fat) | |
1363 | _strlwr (dir_static.d_name); | |
1364 | else if (!NILP (Vw32_downcase_file_names)) | |
1365 | { | |
1366 | register char *p; | |
1367 | for (p = dir_static.d_name; *p; p++) | |
1368 | if (*p >= 'a' && *p <= 'z') | |
1369 | break; | |
1370 | if (!*p) | |
1371 | _strlwr (dir_static.d_name); | |
1372 | } | |
1373 | ||
1374 | return &dir_static; | |
1375 | } | |
1376 | ||
9d3355d1 GV |
1377 | HANDLE |
1378 | open_unc_volume (char *path) | |
1379 | { | |
1380 | NETRESOURCE nr; | |
1381 | HANDLE henum; | |
1382 | int result; | |
1383 | ||
1384 | nr.dwScope = RESOURCE_GLOBALNET; | |
1385 | nr.dwType = RESOURCETYPE_DISK; | |
1386 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; | |
1387 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; | |
1388 | nr.lpLocalName = NULL; | |
1389 | nr.lpRemoteName = map_w32_filename (path, NULL); | |
1390 | nr.lpComment = NULL; | |
1391 | nr.lpProvider = NULL; | |
1392 | ||
1393 | result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK, | |
1394 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); | |
1395 | ||
1396 | if (result == NO_ERROR) | |
1397 | return henum; | |
1398 | else | |
1399 | return INVALID_HANDLE_VALUE; | |
1400 | } | |
1401 | ||
1402 | char * | |
1403 | read_unc_volume (HANDLE henum, char *readbuf, int size) | |
1404 | { | |
1405 | int count; | |
1406 | int result; | |
1407 | int bufsize = 512; | |
1408 | char *buffer; | |
1409 | char *ptr; | |
1410 | ||
1411 | count = 1; | |
1412 | buffer = alloca (bufsize); | |
1413 | result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize); | |
1414 | if (result != NO_ERROR) | |
1415 | return NULL; | |
1416 | ||
1417 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ | |
1418 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; | |
1419 | ptr += 2; | |
1420 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; | |
1421 | ptr++; | |
1422 | ||
1423 | strncpy (readbuf, ptr, size); | |
1424 | return readbuf; | |
1425 | } | |
1426 | ||
1427 | void | |
1428 | close_unc_volume (HANDLE henum) | |
1429 | { | |
1430 | if (henum != INVALID_HANDLE_VALUE) | |
1431 | WNetCloseEnum (henum); | |
1432 | } | |
1433 | ||
1434 | DWORD | |
1435 | unc_volume_file_attributes (char *path) | |
1436 | { | |
1437 | HANDLE henum; | |
1438 | DWORD attrs; | |
1439 | ||
1440 | henum = open_unc_volume (path); | |
1441 | if (henum == INVALID_HANDLE_VALUE) | |
1442 | return -1; | |
1443 | ||
1444 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; | |
1445 | ||
1446 | close_unc_volume (henum); | |
1447 | ||
1448 | return attrs; | |
1449 | } | |
1450 | ||
480b0c5b GV |
1451 | |
1452 | /* Shadow some MSVC runtime functions to map requests for long filenames | |
1453 | to reasonable short names if necessary. This was originally added to | |
1454 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support | |
1455 | long file names. */ | |
1456 | ||
1457 | int | |
1458 | sys_access (const char * path, int mode) | |
1459 | { | |
b3308d2e KH |
1460 | DWORD attributes; |
1461 | ||
1462 | /* MSVC implementation doesn't recognize D_OK. */ | |
1463 | path = map_w32_filename (path, NULL); | |
9d3355d1 GV |
1464 | if (is_unc_volume (path)) |
1465 | { | |
1466 | attributes = unc_volume_file_attributes (path); | |
1467 | if (attributes == -1) { | |
1468 | errno = EACCES; | |
1469 | return -1; | |
1470 | } | |
1471 | } | |
1472 | else if ((attributes = GetFileAttributes (path)) == -1) | |
b3308d2e KH |
1473 | { |
1474 | /* Should try mapping GetLastError to errno; for now just indicate | |
1475 | that path doesn't exist. */ | |
1476 | errno = EACCES; | |
1477 | return -1; | |
1478 | } | |
1479 | if ((mode & X_OK) != 0 && !is_exec (path)) | |
1480 | { | |
1481 | errno = EACCES; | |
1482 | return -1; | |
1483 | } | |
1484 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) | |
1485 | { | |
1486 | errno = EACCES; | |
1487 | return -1; | |
1488 | } | |
1489 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) | |
1490 | { | |
1491 | errno = EACCES; | |
1492 | return -1; | |
1493 | } | |
1494 | return 0; | |
480b0c5b GV |
1495 | } |
1496 | ||
1497 | int | |
1498 | sys_chdir (const char * path) | |
1499 | { | |
fbd6baed | 1500 | return _chdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1501 | } |
1502 | ||
1503 | int | |
1504 | sys_chmod (const char * path, int mode) | |
1505 | { | |
fbd6baed | 1506 | return _chmod (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1507 | } |
1508 | ||
1509 | int | |
1510 | sys_creat (const char * path, int mode) | |
1511 | { | |
fbd6baed | 1512 | return _creat (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1513 | } |
1514 | ||
1515 | FILE * | |
1516 | sys_fopen(const char * path, const char * mode) | |
1517 | { | |
1518 | int fd; | |
1519 | int oflag; | |
1520 | const char * mode_save = mode; | |
1521 | ||
1522 | /* Force all file handles to be non-inheritable. This is necessary to | |
1523 | ensure child processes don't unwittingly inherit handles that might | |
1524 | prevent future file access. */ | |
1525 | ||
1526 | if (mode[0] == 'r') | |
1527 | oflag = O_RDONLY; | |
1528 | else if (mode[0] == 'w' || mode[0] == 'a') | |
1529 | oflag = O_WRONLY | O_CREAT | O_TRUNC; | |
95ed0025 | 1530 | else |
480b0c5b GV |
1531 | return NULL; |
1532 | ||
1533 | /* Only do simplistic option parsing. */ | |
1534 | while (*++mode) | |
1535 | if (mode[0] == '+') | |
1536 | { | |
1537 | oflag &= ~(O_RDONLY | O_WRONLY); | |
1538 | oflag |= O_RDWR; | |
1539 | } | |
1540 | else if (mode[0] == 'b') | |
1541 | { | |
1542 | oflag &= ~O_TEXT; | |
1543 | oflag |= O_BINARY; | |
1544 | } | |
1545 | else if (mode[0] == 't') | |
1546 | { | |
1547 | oflag &= ~O_BINARY; | |
1548 | oflag |= O_TEXT; | |
1549 | } | |
1550 | else break; | |
1551 | ||
fbd6baed | 1552 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
480b0c5b GV |
1553 | if (fd < 0) |
1554 | return NULL; | |
1555 | ||
76b3903d | 1556 | return _fdopen (fd, mode_save); |
95ed0025 | 1557 | } |
480b0c5b | 1558 | |
76b3903d | 1559 | /* This only works on NTFS volumes, but is useful to have. */ |
480b0c5b | 1560 | int |
76b3903d | 1561 | sys_link (const char * old, const char * new) |
480b0c5b | 1562 | { |
76b3903d GV |
1563 | HANDLE fileh; |
1564 | int result = -1; | |
1565 | char oldname[MAX_PATH], newname[MAX_PATH]; | |
1566 | ||
1567 | if (old == NULL || new == NULL) | |
1568 | { | |
1569 | errno = ENOENT; | |
1570 | return -1; | |
1571 | } | |
1572 | ||
1573 | strcpy (oldname, map_w32_filename (old, NULL)); | |
1574 | strcpy (newname, map_w32_filename (new, NULL)); | |
1575 | ||
1576 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, | |
1577 | FILE_FLAG_BACKUP_SEMANTICS, NULL); | |
1578 | if (fileh != INVALID_HANDLE_VALUE) | |
1579 | { | |
1580 | int wlen; | |
1581 | ||
1582 | /* Confusingly, the "alternate" stream name field does not apply | |
1583 | when restoring a hard link, and instead contains the actual | |
1584 | stream data for the link (ie. the name of the link to create). | |
1585 | The WIN32_STREAM_ID structure before the cStreamName field is | |
1586 | the stream header, which is then immediately followed by the | |
1587 | stream data. */ | |
1588 | ||
1589 | struct { | |
1590 | WIN32_STREAM_ID wid; | |
1591 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ | |
1592 | } data; | |
1593 | ||
1594 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, | |
1595 | data.wid.cStreamName, MAX_PATH); | |
1596 | if (wlen > 0) | |
1597 | { | |
1598 | LPVOID context = NULL; | |
1599 | DWORD wbytes = 0; | |
1600 | ||
1601 | data.wid.dwStreamId = BACKUP_LINK; | |
1602 | data.wid.dwStreamAttributes = 0; | |
1603 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); | |
1604 | data.wid.Size.HighPart = 0; | |
1605 | data.wid.dwStreamNameSize = 0; | |
1606 | ||
1607 | if (BackupWrite (fileh, (LPBYTE)&data, | |
1608 | offsetof (WIN32_STREAM_ID, cStreamName) | |
1609 | + data.wid.Size.LowPart, | |
1610 | &wbytes, FALSE, FALSE, &context) | |
1611 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) | |
1612 | { | |
1613 | /* succeeded */ | |
1614 | result = 0; | |
1615 | } | |
1616 | else | |
1617 | { | |
1618 | /* Should try mapping GetLastError to errno; for now just | |
1619 | indicate a general error (eg. links not supported). */ | |
1620 | errno = EINVAL; // perhaps EMLINK? | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | CloseHandle (fileh); | |
1625 | } | |
1626 | else | |
1627 | errno = ENOENT; | |
1628 | ||
1629 | return result; | |
480b0c5b GV |
1630 | } |
1631 | ||
1632 | int | |
1633 | sys_mkdir (const char * path) | |
1634 | { | |
fbd6baed | 1635 | return _mkdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1636 | } |
1637 | ||
9d1778b1 RS |
1638 | /* Because of long name mapping issues, we need to implement this |
1639 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate | |
1640 | a unique name, instead of setting the input template to an empty | |
1641 | string. | |
1642 | ||
1643 | Standard algorithm seems to be use pid or tid with a letter on the | |
1644 | front (in place of the 6 X's) and cycle through the letters to find a | |
1645 | unique name. We extend that to allow any reasonable character as the | |
1646 | first of the 6 X's. */ | |
480b0c5b GV |
1647 | char * |
1648 | sys_mktemp (char * template) | |
1649 | { | |
9d1778b1 RS |
1650 | char * p; |
1651 | int i; | |
1652 | unsigned uid = GetCurrentThreadId (); | |
1653 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; | |
1654 | ||
1655 | if (template == NULL) | |
1656 | return NULL; | |
1657 | p = template + strlen (template); | |
1658 | i = 5; | |
1659 | /* replace up to the last 5 X's with uid in decimal */ | |
1660 | while (--p >= template && p[0] == 'X' && --i >= 0) | |
1661 | { | |
1662 | p[0] = '0' + uid % 10; | |
1663 | uid /= 10; | |
1664 | } | |
1665 | ||
1666 | if (i < 0 && p[0] == 'X') | |
1667 | { | |
1668 | i = 0; | |
1669 | do | |
1670 | { | |
1671 | int save_errno = errno; | |
1672 | p[0] = first_char[i]; | |
1673 | if (sys_access (template, 0) < 0) | |
1674 | { | |
1675 | errno = save_errno; | |
1676 | return template; | |
1677 | } | |
1678 | } | |
1679 | while (++i < sizeof (first_char)); | |
1680 | } | |
1681 | ||
1682 | /* Template is badly formed or else we can't generate a unique name, | |
1683 | so return empty string */ | |
1684 | template[0] = 0; | |
1685 | return template; | |
480b0c5b GV |
1686 | } |
1687 | ||
1688 | int | |
1689 | sys_open (const char * path, int oflag, int mode) | |
1690 | { | |
1691 | /* Force all file handles to be non-inheritable. */ | |
fbd6baed | 1692 | return _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, mode); |
480b0c5b GV |
1693 | } |
1694 | ||
1695 | int | |
1696 | sys_rename (const char * oldname, const char * newname) | |
1697 | { | |
eb9ea53f | 1698 | int result; |
b3308d2e | 1699 | char temp[MAX_PATH]; |
480b0c5b | 1700 | |
e9e23e23 | 1701 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
5162ffce MB |
1702 | alias in a number of circumstances (it is not easy to predict when |
1703 | just by looking at oldname and newname, unfortunately). In these | |
1704 | cases, renaming through a temporary name avoids the problem. | |
1705 | ||
e9e23e23 | 1706 | A second problem on Windows 95 is that renaming through a temp name when |
5162ffce MB |
1707 | newname is uppercase fails (the final long name ends up in |
1708 | lowercase, although the short alias might be uppercase) UNLESS the | |
1709 | long temp name is not 8.3. | |
1710 | ||
e9e23e23 | 1711 | So, on Windows 95 we always rename through a temp name, and we make sure |
5162ffce | 1712 | the temp name has a long extension to ensure correct renaming. */ |
480b0c5b | 1713 | |
fbd6baed | 1714 | strcpy (temp, map_w32_filename (oldname, NULL)); |
480b0c5b | 1715 | |
76b3903d | 1716 | if (os_subtype == OS_WIN95) |
480b0c5b | 1717 | { |
b3308d2e | 1718 | char * o; |
480b0c5b | 1719 | char * p; |
b3308d2e KH |
1720 | int i = 0; |
1721 | ||
1722 | oldname = map_w32_filename (oldname, NULL); | |
1723 | if (o = strrchr (oldname, '\\')) | |
1724 | o++; | |
1725 | else | |
1726 | o = (char *) oldname; | |
480b0c5b | 1727 | |
480b0c5b GV |
1728 | if (p = strrchr (temp, '\\')) |
1729 | p++; | |
1730 | else | |
1731 | p = temp; | |
b3308d2e KH |
1732 | |
1733 | do | |
1734 | { | |
1735 | /* Force temp name to require a manufactured 8.3 alias - this | |
1736 | seems to make the second rename work properly. */ | |
f313ee82 | 1737 | sprintf (p, "_.%s.%u", o, i); |
b3308d2e | 1738 | i++; |
58f0cb7e | 1739 | result = rename (oldname, temp); |
b3308d2e KH |
1740 | } |
1741 | /* This loop must surely terminate! */ | |
f313ee82 | 1742 | while (result < 0 && (errno == EEXIST || errno == EACCES)); |
58f0cb7e | 1743 | if (result < 0) |
480b0c5b GV |
1744 | return -1; |
1745 | } | |
1746 | ||
1747 | /* Emulate Unix behaviour - newname is deleted if it already exists | |
5162ffce | 1748 | (at least if it is a file; don't do this for directories). |
76b3903d | 1749 | |
b3308d2e KH |
1750 | Since we mustn't do this if we are just changing the case of the |
1751 | file name (we would end up deleting the file we are trying to | |
1752 | rename!), we let rename detect if the destination file already | |
1753 | exists - that way we avoid the possible pitfalls of trying to | |
1754 | determine ourselves whether two names really refer to the same | |
1755 | file, which is not always possible in the general case. (Consider | |
1756 | all the permutations of shared or subst'd drives, etc.) */ | |
1757 | ||
1758 | newname = map_w32_filename (newname, NULL); | |
eb9ea53f | 1759 | result = rename (temp, newname); |
b3308d2e KH |
1760 | |
1761 | if (result < 0 | |
f313ee82 | 1762 | && (errno == EEXIST || errno == EACCES) |
b3308d2e KH |
1763 | && _chmod (newname, 0666) == 0 |
1764 | && _unlink (newname) == 0) | |
1765 | result = rename (temp, newname); | |
480b0c5b | 1766 | |
eb9ea53f | 1767 | return result; |
480b0c5b GV |
1768 | } |
1769 | ||
1770 | int | |
1771 | sys_rmdir (const char * path) | |
1772 | { | |
fbd6baed | 1773 | return _rmdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1774 | } |
1775 | ||
1776 | int | |
1777 | sys_unlink (const char * path) | |
1778 | { | |
16bb7578 GV |
1779 | path = map_w32_filename (path, NULL); |
1780 | ||
1781 | /* On Unix, unlink works without write permission. */ | |
1782 | _chmod (path, 0666); | |
1783 | return _unlink (path); | |
480b0c5b GV |
1784 | } |
1785 | ||
1786 | static FILETIME utc_base_ft; | |
1787 | static long double utc_base; | |
1788 | static int init = 0; | |
1789 | ||
1790 | static time_t | |
1791 | convert_time (FILETIME ft) | |
1792 | { | |
1793 | long double ret; | |
1794 | ||
1795 | if (!init) | |
1796 | { | |
1797 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1798 | SYSTEMTIME st; | |
1799 | ||
1800 | st.wYear = 1970; | |
1801 | st.wMonth = 1; | |
1802 | st.wDay = 1; | |
1803 | st.wHour = 0; | |
1804 | st.wMinute = 0; | |
1805 | st.wSecond = 0; | |
1806 | st.wMilliseconds = 0; | |
1807 | ||
1808 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1809 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1810 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1811 | init = 1; | |
1812 | } | |
1813 | ||
1814 | if (CompareFileTime (&ft, &utc_base_ft) < 0) | |
1815 | return 0; | |
1816 | ||
1817 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; | |
1818 | ret -= utc_base; | |
1819 | return (time_t) (ret * 1e-7); | |
1820 | } | |
1821 | ||
480b0c5b GV |
1822 | void |
1823 | convert_from_time_t (time_t time, FILETIME * pft) | |
1824 | { | |
1825 | long double tmp; | |
1826 | ||
1827 | if (!init) | |
1828 | { | |
1829 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1830 | SYSTEMTIME st; | |
1831 | ||
1832 | st.wYear = 1970; | |
1833 | st.wMonth = 1; | |
1834 | st.wDay = 1; | |
1835 | st.wHour = 0; | |
1836 | st.wMinute = 0; | |
1837 | st.wSecond = 0; | |
1838 | st.wMilliseconds = 0; | |
1839 | ||
1840 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1841 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1842 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1843 | init = 1; | |
1844 | } | |
1845 | ||
1846 | /* time in 100ns units since 1-Jan-1601 */ | |
1847 | tmp = (long double) time * 1e7 + utc_base; | |
1848 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); | |
16bb7578 | 1849 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
480b0c5b | 1850 | } |
480b0c5b | 1851 | |
76b3903d GV |
1852 | #if 0 |
1853 | /* No reason to keep this; faking inode values either by hashing or even | |
1854 | using the file index from GetInformationByHandle, is not perfect and | |
1855 | so by default Emacs doesn't use the inode values on Windows. | |
1856 | Instead, we now determine file-truename correctly (except for | |
1857 | possible drive aliasing etc). */ | |
1858 | ||
1859 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ | |
480b0c5b | 1860 | static unsigned |
76b3903d | 1861 | hashval (const unsigned char * str) |
480b0c5b GV |
1862 | { |
1863 | unsigned h = 0; | |
480b0c5b GV |
1864 | while (*str) |
1865 | { | |
1866 | h = (h << 4) + *str++; | |
76b3903d | 1867 | h ^= (h >> 28); |
480b0c5b GV |
1868 | } |
1869 | return h; | |
1870 | } | |
1871 | ||
1872 | /* Return the hash value of the canonical pathname, excluding the | |
1873 | drive/UNC header, to get a hopefully unique inode number. */ | |
76b3903d | 1874 | static DWORD |
480b0c5b GV |
1875 | generate_inode_val (const char * name) |
1876 | { | |
1877 | char fullname[ MAX_PATH ]; | |
1878 | char * p; | |
1879 | unsigned hash; | |
1880 | ||
76b3903d GV |
1881 | /* Get the truly canonical filename, if it exists. (Note: this |
1882 | doesn't resolve aliasing due to subst commands, or recognise hard | |
1883 | links. */ | |
1884 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) | |
1885 | abort (); | |
1886 | ||
1887 | parse_root (fullname, &p); | |
fbd6baed | 1888 | /* Normal W32 filesystems are still case insensitive. */ |
480b0c5b | 1889 | _strlwr (p); |
76b3903d | 1890 | return hashval (p); |
480b0c5b GV |
1891 | } |
1892 | ||
76b3903d GV |
1893 | #endif |
1894 | ||
480b0c5b GV |
1895 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
1896 | replace it with our own. This also allows us to calculate consistent | |
1897 | inode values without hacks in the main Emacs code. */ | |
1898 | int | |
1899 | stat (const char * path, struct stat * buf) | |
1900 | { | |
eb9ea53f | 1901 | char *name, *r; |
480b0c5b GV |
1902 | WIN32_FIND_DATA wfd; |
1903 | HANDLE fh; | |
76b3903d | 1904 | DWORD fake_inode; |
480b0c5b GV |
1905 | int permission; |
1906 | int len; | |
1907 | int rootdir = FALSE; | |
1908 | ||
1909 | if (path == NULL || buf == NULL) | |
1910 | { | |
1911 | errno = EFAULT; | |
1912 | return -1; | |
1913 | } | |
1914 | ||
fbd6baed | 1915 | name = (char *) map_w32_filename (path, &path); |
9ab8560d | 1916 | /* must be valid filename, no wild cards or other invalid characters */ |
bb1584c8 | 1917 | if (strpbrk (name, "*?|<>\"")) |
480b0c5b GV |
1918 | { |
1919 | errno = ENOENT; | |
1920 | return -1; | |
1921 | } | |
1922 | ||
eb9ea53f GV |
1923 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
1924 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; | |
1925 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') | |
1926 | { | |
1927 | r[1] = r[2] = '\0'; | |
1928 | } | |
1929 | ||
480b0c5b GV |
1930 | /* Remove trailing directory separator, unless name is the root |
1931 | directory of a drive or UNC volume in which case ensure there | |
1932 | is a trailing separator. */ | |
1933 | len = strlen (name); | |
1934 | rootdir = (path >= name + len - 1 | |
1935 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); | |
1936 | name = strcpy (alloca (len + 2), name); | |
1937 | ||
9d3355d1 GV |
1938 | if (is_unc_volume (name)) |
1939 | { | |
1940 | DWORD attrs = unc_volume_file_attributes (name); | |
1941 | ||
1942 | if (attrs == -1) | |
1943 | return -1; | |
1944 | ||
1945 | memset (&wfd, 0, sizeof (wfd)); | |
1946 | wfd.dwFileAttributes = attrs; | |
1947 | wfd.ftCreationTime = utc_base_ft; | |
1948 | wfd.ftLastAccessTime = utc_base_ft; | |
1949 | wfd.ftLastWriteTime = utc_base_ft; | |
1950 | strcpy (wfd.cFileName, name); | |
1951 | } | |
1952 | else if (rootdir) | |
480b0c5b GV |
1953 | { |
1954 | if (!IS_DIRECTORY_SEP (name[len-1])) | |
1955 | strcat (name, "\\"); | |
1956 | if (GetDriveType (name) < 2) | |
1957 | { | |
1958 | errno = ENOENT; | |
1959 | return -1; | |
1960 | } | |
1961 | memset (&wfd, 0, sizeof (wfd)); | |
1962 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; | |
1963 | wfd.ftCreationTime = utc_base_ft; | |
1964 | wfd.ftLastAccessTime = utc_base_ft; | |
1965 | wfd.ftLastWriteTime = utc_base_ft; | |
1966 | strcpy (wfd.cFileName, name); | |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | if (IS_DIRECTORY_SEP (name[len-1])) | |
1971 | name[len - 1] = 0; | |
76b3903d GV |
1972 | |
1973 | /* (This is hacky, but helps when doing file completions on | |
1974 | network drives.) Optimize by using information available from | |
1975 | active readdir if possible. */ | |
b19cc00c GV |
1976 | len = strlen (dir_pathname); |
1977 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) | |
1978 | len--; | |
76b3903d | 1979 | if (dir_find_handle != INVALID_HANDLE_VALUE |
b19cc00c | 1980 | && strnicmp (name, dir_pathname, len) == 0 |
76b3903d GV |
1981 | && IS_DIRECTORY_SEP (name[len]) |
1982 | && stricmp (name + len + 1, dir_static.d_name) == 0) | |
480b0c5b | 1983 | { |
76b3903d GV |
1984 | /* This was the last entry returned by readdir. */ |
1985 | wfd = dir_find_data; | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | fh = FindFirstFile (name, &wfd); | |
1990 | if (fh == INVALID_HANDLE_VALUE) | |
1991 | { | |
1992 | errno = ENOENT; | |
1993 | return -1; | |
1994 | } | |
1995 | FindClose (fh); | |
480b0c5b | 1996 | } |
480b0c5b GV |
1997 | } |
1998 | ||
1999 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2000 | { | |
2001 | buf->st_mode = _S_IFDIR; | |
2002 | buf->st_nlink = 2; /* doesn't really matter */ | |
76b3903d | 2003 | fake_inode = 0; /* this doesn't either I think */ |
480b0c5b | 2004 | } |
710ea1b8 RS |
2005 | else if (!NILP (Vw32_get_true_file_attributes) |
2006 | /* No access rights required to get info. */ | |
2007 | && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, 0, NULL)) | |
2008 | != INVALID_HANDLE_VALUE) | |
480b0c5b | 2009 | { |
480b0c5b GV |
2010 | /* This is more accurate in terms of gettting the correct number |
2011 | of links, but is quite slow (it is noticable when Emacs is | |
2012 | making a list of file name completions). */ | |
2013 | BY_HANDLE_FILE_INFORMATION info; | |
2014 | ||
480b0c5b GV |
2015 | if (GetFileInformationByHandle (fh, &info)) |
2016 | { | |
480b0c5b | 2017 | buf->st_nlink = info.nNumberOfLinks; |
76b3903d GV |
2018 | /* Might as well use file index to fake inode values, but this |
2019 | is not guaranteed to be unique unless we keep a handle open | |
2020 | all the time (even then there are situations where it is | |
2021 | not unique). Reputedly, there are at most 48 bits of info | |
2022 | (on NTFS, presumably less on FAT). */ | |
2023 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
480b0c5b GV |
2024 | } |
2025 | else | |
2026 | { | |
01f31dfb AI |
2027 | buf->st_nlink = 1; |
2028 | fake_inode = 0; | |
2029 | } | |
2030 | ||
2031 | switch (GetFileType (fh)) | |
2032 | { | |
2033 | case FILE_TYPE_DISK: | |
2034 | buf->st_mode = _S_IFREG; | |
2035 | break; | |
2036 | case FILE_TYPE_PIPE: | |
2037 | buf->st_mode = _S_IFIFO; | |
2038 | break; | |
2039 | case FILE_TYPE_CHAR: | |
2040 | case FILE_TYPE_UNKNOWN: | |
2041 | default: | |
2042 | buf->st_mode = _S_IFCHR; | |
480b0c5b | 2043 | } |
01f31dfb | 2044 | CloseHandle (fh); |
76b3903d GV |
2045 | } |
2046 | else | |
2047 | { | |
2048 | /* Don't bother to make this information more accurate. */ | |
480b0c5b GV |
2049 | buf->st_mode = _S_IFREG; |
2050 | buf->st_nlink = 1; | |
76b3903d GV |
2051 | fake_inode = 0; |
2052 | } | |
2053 | ||
2054 | #if 0 | |
2055 | /* Not sure if there is any point in this. */ | |
2056 | if (!NILP (Vw32_generate_fake_inodes)) | |
2057 | fake_inode = generate_inode_val (name); | |
2058 | else if (fake_inode == 0) | |
2059 | { | |
2060 | /* For want of something better, try to make everything unique. */ | |
2061 | static DWORD gen_num = 0; | |
2062 | fake_inode = ++gen_num; | |
480b0c5b | 2063 | } |
76b3903d GV |
2064 | #endif |
2065 | ||
2066 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2067 | if (sizeof (buf->st_ino) == 2) | |
2068 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2069 | else | |
2070 | buf->st_ino = fake_inode; | |
480b0c5b GV |
2071 | |
2072 | /* consider files to belong to current user */ | |
2073 | buf->st_uid = the_passwd.pw_uid; | |
2074 | buf->st_gid = the_passwd.pw_gid; | |
2075 | ||
fbd6baed | 2076 | /* volume_info is set indirectly by map_w32_filename */ |
480b0c5b GV |
2077 | buf->st_dev = volume_info.serialnum; |
2078 | buf->st_rdev = volume_info.serialnum; | |
2079 | ||
480b0c5b GV |
2080 | |
2081 | buf->st_size = wfd.nFileSizeLow; | |
2082 | ||
2083 | /* Convert timestamps to Unix format. */ | |
2084 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); | |
2085 | buf->st_atime = convert_time (wfd.ftLastAccessTime); | |
2086 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2087 | buf->st_ctime = convert_time (wfd.ftCreationTime); | |
2088 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2089 | ||
2090 | /* determine rwx permissions */ | |
2091 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2092 | permission = _S_IREAD; | |
2093 | else | |
2094 | permission = _S_IREAD | _S_IWRITE; | |
2095 | ||
2096 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2097 | permission |= _S_IEXEC; | |
b3308d2e KH |
2098 | else if (is_exec (name)) |
2099 | permission |= _S_IEXEC; | |
480b0c5b GV |
2100 | |
2101 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
16bb7578 GV |
2106 | /* Provide fstat and utime as well as stat for consistent handling of |
2107 | file timestamps. */ | |
2108 | int | |
2109 | fstat (int desc, struct stat * buf) | |
2110 | { | |
2111 | HANDLE fh = (HANDLE) _get_osfhandle (desc); | |
2112 | BY_HANDLE_FILE_INFORMATION info; | |
2113 | DWORD fake_inode; | |
2114 | int permission; | |
2115 | ||
2116 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) | |
2117 | { | |
2118 | case FILE_TYPE_DISK: | |
2119 | buf->st_mode = _S_IFREG; | |
2120 | if (!GetFileInformationByHandle (fh, &info)) | |
2121 | { | |
2122 | errno = EACCES; | |
2123 | return -1; | |
2124 | } | |
2125 | break; | |
2126 | case FILE_TYPE_PIPE: | |
2127 | buf->st_mode = _S_IFIFO; | |
2128 | goto non_disk; | |
2129 | case FILE_TYPE_CHAR: | |
2130 | case FILE_TYPE_UNKNOWN: | |
2131 | default: | |
2132 | buf->st_mode = _S_IFCHR; | |
2133 | non_disk: | |
2134 | memset (&info, 0, sizeof (info)); | |
2135 | info.dwFileAttributes = 0; | |
2136 | info.ftCreationTime = utc_base_ft; | |
2137 | info.ftLastAccessTime = utc_base_ft; | |
2138 | info.ftLastWriteTime = utc_base_ft; | |
2139 | } | |
2140 | ||
2141 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2142 | { | |
2143 | buf->st_mode = _S_IFDIR; | |
2144 | buf->st_nlink = 2; /* doesn't really matter */ | |
2145 | fake_inode = 0; /* this doesn't either I think */ | |
2146 | } | |
2147 | else | |
2148 | { | |
2149 | buf->st_nlink = info.nNumberOfLinks; | |
2150 | /* Might as well use file index to fake inode values, but this | |
2151 | is not guaranteed to be unique unless we keep a handle open | |
2152 | all the time (even then there are situations where it is | |
2153 | not unique). Reputedly, there are at most 48 bits of info | |
2154 | (on NTFS, presumably less on FAT). */ | |
2155 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
2156 | } | |
2157 | ||
2158 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2159 | if (sizeof (buf->st_ino) == 2) | |
2160 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2161 | else | |
2162 | buf->st_ino = fake_inode; | |
2163 | ||
2164 | /* consider files to belong to current user */ | |
2165 | buf->st_uid = 0; | |
2166 | buf->st_gid = 0; | |
2167 | ||
2168 | buf->st_dev = info.dwVolumeSerialNumber; | |
2169 | buf->st_rdev = info.dwVolumeSerialNumber; | |
2170 | ||
2171 | buf->st_size = info.nFileSizeLow; | |
2172 | ||
2173 | /* Convert timestamps to Unix format. */ | |
2174 | buf->st_mtime = convert_time (info.ftLastWriteTime); | |
2175 | buf->st_atime = convert_time (info.ftLastAccessTime); | |
2176 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2177 | buf->st_ctime = convert_time (info.ftCreationTime); | |
2178 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2179 | ||
2180 | /* determine rwx permissions */ | |
2181 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2182 | permission = _S_IREAD; | |
2183 | else | |
2184 | permission = _S_IREAD | _S_IWRITE; | |
2185 | ||
2186 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2187 | permission |= _S_IEXEC; | |
2188 | else | |
2189 | { | |
2190 | #if 0 /* no way of knowing the filename */ | |
2191 | char * p = strrchr (name, '.'); | |
2192 | if (p != NULL && | |
2193 | (stricmp (p, ".exe") == 0 || | |
2194 | stricmp (p, ".com") == 0 || | |
2195 | stricmp (p, ".bat") == 0 || | |
2196 | stricmp (p, ".cmd") == 0)) | |
2197 | permission |= _S_IEXEC; | |
2198 | #endif | |
2199 | } | |
2200 | ||
2201 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2202 | ||
2203 | return 0; | |
2204 | } | |
2205 | ||
2206 | int | |
2207 | utime (const char *name, struct utimbuf *times) | |
2208 | { | |
2209 | struct utimbuf deftime; | |
2210 | HANDLE fh; | |
2211 | FILETIME mtime; | |
2212 | FILETIME atime; | |
2213 | ||
2214 | if (times == NULL) | |
2215 | { | |
2216 | deftime.modtime = deftime.actime = time (NULL); | |
2217 | times = &deftime; | |
2218 | } | |
2219 | ||
2220 | /* Need write access to set times. */ | |
2221 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, | |
2222 | 0, OPEN_EXISTING, 0, NULL); | |
2223 | if (fh) | |
2224 | { | |
2225 | convert_from_time_t (times->actime, &atime); | |
2226 | convert_from_time_t (times->modtime, &mtime); | |
2227 | if (!SetFileTime (fh, NULL, &atime, &mtime)) | |
2228 | { | |
2229 | CloseHandle (fh); | |
2230 | errno = EACCES; | |
2231 | return -1; | |
2232 | } | |
2233 | CloseHandle (fh); | |
2234 | } | |
2235 | else | |
2236 | { | |
2237 | errno = EINVAL; | |
2238 | return -1; | |
2239 | } | |
2240 | return 0; | |
2241 | } | |
2242 | ||
480b0c5b GV |
2243 | #ifdef HAVE_SOCKETS |
2244 | ||
2245 | /* Wrappers for winsock functions to map between our file descriptors | |
2246 | and winsock's handles; also set h_errno for convenience. | |
2247 | ||
2248 | To allow Emacs to run on systems which don't have winsock support | |
2249 | installed, we dynamically link to winsock on startup if present, and | |
2250 | otherwise provide the minimum necessary functionality | |
2251 | (eg. gethostname). */ | |
2252 | ||
2253 | /* function pointers for relevant socket functions */ | |
2254 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); | |
2255 | void (PASCAL *pfn_WSASetLastError) (int iError); | |
2256 | int (PASCAL *pfn_WSAGetLastError) (void); | |
2257 | int (PASCAL *pfn_socket) (int af, int type, int protocol); | |
2258 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2259 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2260 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); | |
2261 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); | |
2262 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); | |
2263 | int (PASCAL *pfn_closesocket) (SOCKET s); | |
2264 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); | |
2265 | int (PASCAL *pfn_WSACleanup) (void); | |
2266 | ||
2267 | u_short (PASCAL *pfn_htons) (u_short hostshort); | |
2268 | u_short (PASCAL *pfn_ntohs) (u_short netshort); | |
2269 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); | |
2270 | int (PASCAL *pfn_gethostname) (char * name, int namelen); | |
2271 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); | |
2272 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); | |
f1614061 RS |
2273 | |
2274 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ | |
2275 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); | |
2276 | #ifndef HANDLE_FLAG_INHERIT | |
2277 | #define HANDLE_FLAG_INHERIT 1 | |
2278 | #endif | |
480b0c5b | 2279 | |
f249a012 RS |
2280 | HANDLE winsock_lib; |
2281 | static int winsock_inuse; | |
480b0c5b | 2282 | |
f249a012 | 2283 | BOOL |
480b0c5b GV |
2284 | term_winsock (void) |
2285 | { | |
f249a012 | 2286 | if (winsock_lib != NULL && winsock_inuse == 0) |
480b0c5b | 2287 | { |
f249a012 RS |
2288 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
2289 | after WSAStartup returns successfully, but it seems reasonable | |
2290 | to allow unloading winsock anyway in that case. */ | |
2291 | if (pfn_WSACleanup () == 0 || | |
2292 | pfn_WSAGetLastError () == WSAENETDOWN) | |
2293 | { | |
2294 | if (FreeLibrary (winsock_lib)) | |
2295 | winsock_lib = NULL; | |
2296 | return TRUE; | |
2297 | } | |
480b0c5b | 2298 | } |
f249a012 | 2299 | return FALSE; |
480b0c5b GV |
2300 | } |
2301 | ||
f249a012 RS |
2302 | BOOL |
2303 | init_winsock (int load_now) | |
480b0c5b GV |
2304 | { |
2305 | WSADATA winsockData; | |
2306 | ||
f249a012 RS |
2307 | if (winsock_lib != NULL) |
2308 | return TRUE; | |
f1614061 RS |
2309 | |
2310 | pfn_SetHandleInformation = NULL; | |
2311 | pfn_SetHandleInformation | |
2312 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
2313 | "SetHandleInformation"); | |
2314 | ||
480b0c5b GV |
2315 | winsock_lib = LoadLibrary ("wsock32.dll"); |
2316 | ||
2317 | if (winsock_lib != NULL) | |
2318 | { | |
2319 | /* dynamically link to socket functions */ | |
2320 | ||
2321 | #define LOAD_PROC(fn) \ | |
2322 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ | |
2323 | goto fail; | |
2324 | ||
2325 | LOAD_PROC( WSAStartup ); | |
2326 | LOAD_PROC( WSASetLastError ); | |
2327 | LOAD_PROC( WSAGetLastError ); | |
2328 | LOAD_PROC( socket ); | |
2329 | LOAD_PROC( bind ); | |
2330 | LOAD_PROC( connect ); | |
2331 | LOAD_PROC( ioctlsocket ); | |
2332 | LOAD_PROC( recv ); | |
2333 | LOAD_PROC( send ); | |
2334 | LOAD_PROC( closesocket ); | |
2335 | LOAD_PROC( shutdown ); | |
2336 | LOAD_PROC( htons ); | |
2337 | LOAD_PROC( ntohs ); | |
2338 | LOAD_PROC( inet_addr ); | |
2339 | LOAD_PROC( gethostname ); | |
2340 | LOAD_PROC( gethostbyname ); | |
2341 | LOAD_PROC( getservbyname ); | |
2342 | LOAD_PROC( WSACleanup ); | |
2343 | ||
f249a012 RS |
2344 | #undef LOAD_PROC |
2345 | ||
480b0c5b GV |
2346 | /* specify version 1.1 of winsock */ |
2347 | if (pfn_WSAStartup (0x101, &winsockData) == 0) | |
2348 | { | |
f249a012 RS |
2349 | if (winsockData.wVersion != 0x101) |
2350 | goto fail; | |
2351 | ||
2352 | if (!load_now) | |
2353 | { | |
2354 | /* Report that winsock exists and is usable, but leave | |
2355 | socket functions disabled. I am assuming that calling | |
2356 | WSAStartup does not require any network interaction, | |
2357 | and in particular does not cause or require a dial-up | |
2358 | connection to be established. */ | |
2359 | ||
2360 | pfn_WSACleanup (); | |
2361 | FreeLibrary (winsock_lib); | |
2362 | winsock_lib = NULL; | |
2363 | } | |
2364 | winsock_inuse = 0; | |
2365 | return TRUE; | |
480b0c5b GV |
2366 | } |
2367 | ||
2368 | fail: | |
2369 | FreeLibrary (winsock_lib); | |
f249a012 | 2370 | winsock_lib = NULL; |
480b0c5b | 2371 | } |
f249a012 RS |
2372 | |
2373 | return FALSE; | |
480b0c5b GV |
2374 | } |
2375 | ||
2376 | ||
2377 | int h_errno = 0; | |
2378 | ||
2379 | /* function to set h_errno for compatability; map winsock error codes to | |
2380 | normal system codes where they overlap (non-overlapping definitions | |
2381 | are already in <sys/socket.h> */ | |
2382 | static void set_errno () | |
2383 | { | |
f249a012 | 2384 | if (winsock_lib == NULL) |
480b0c5b GV |
2385 | h_errno = EINVAL; |
2386 | else | |
2387 | h_errno = pfn_WSAGetLastError (); | |
2388 | ||
2389 | switch (h_errno) | |
2390 | { | |
2391 | case WSAEACCES: h_errno = EACCES; break; | |
2392 | case WSAEBADF: h_errno = EBADF; break; | |
2393 | case WSAEFAULT: h_errno = EFAULT; break; | |
2394 | case WSAEINTR: h_errno = EINTR; break; | |
2395 | case WSAEINVAL: h_errno = EINVAL; break; | |
2396 | case WSAEMFILE: h_errno = EMFILE; break; | |
2397 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; | |
2398 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; | |
2399 | } | |
2400 | errno = h_errno; | |
2401 | } | |
2402 | ||
2403 | static void check_errno () | |
2404 | { | |
f249a012 | 2405 | if (h_errno == 0 && winsock_lib != NULL) |
480b0c5b GV |
2406 | pfn_WSASetLastError (0); |
2407 | } | |
2408 | ||
d8fcc1b9 AI |
2409 | /* Extend strerror to handle the winsock-specific error codes. */ |
2410 | struct { | |
2411 | int errnum; | |
2412 | char * msg; | |
2413 | } _wsa_errlist[] = { | |
2414 | WSAEINTR , "Interrupted function call", | |
2415 | WSAEBADF , "Bad file descriptor", | |
2416 | WSAEACCES , "Permission denied", | |
2417 | WSAEFAULT , "Bad address", | |
2418 | WSAEINVAL , "Invalid argument", | |
2419 | WSAEMFILE , "Too many open files", | |
2420 | ||
2421 | WSAEWOULDBLOCK , "Resource temporarily unavailable", | |
2422 | WSAEINPROGRESS , "Operation now in progress", | |
2423 | WSAEALREADY , "Operation already in progress", | |
2424 | WSAENOTSOCK , "Socket operation on non-socket", | |
2425 | WSAEDESTADDRREQ , "Destination address required", | |
2426 | WSAEMSGSIZE , "Message too long", | |
2427 | WSAEPROTOTYPE , "Protocol wrong type for socket", | |
2428 | WSAENOPROTOOPT , "Bad protocol option", | |
2429 | WSAEPROTONOSUPPORT , "Protocol not supported", | |
2430 | WSAESOCKTNOSUPPORT , "Socket type not supported", | |
2431 | WSAEOPNOTSUPP , "Operation not supported", | |
2432 | WSAEPFNOSUPPORT , "Protocol family not supported", | |
2433 | WSAEAFNOSUPPORT , "Address family not supported by protocol family", | |
2434 | WSAEADDRINUSE , "Address already in use", | |
2435 | WSAEADDRNOTAVAIL , "Cannot assign requested address", | |
2436 | WSAENETDOWN , "Network is down", | |
2437 | WSAENETUNREACH , "Network is unreachable", | |
2438 | WSAENETRESET , "Network dropped connection on reset", | |
2439 | WSAECONNABORTED , "Software caused connection abort", | |
2440 | WSAECONNRESET , "Connection reset by peer", | |
2441 | WSAENOBUFS , "No buffer space available", | |
2442 | WSAEISCONN , "Socket is already connected", | |
2443 | WSAENOTCONN , "Socket is not connected", | |
2444 | WSAESHUTDOWN , "Cannot send after socket shutdown", | |
2445 | WSAETOOMANYREFS , "Too many references", /* not sure */ | |
2446 | WSAETIMEDOUT , "Connection timed out", | |
2447 | WSAECONNREFUSED , "Connection refused", | |
2448 | WSAELOOP , "Network loop", /* not sure */ | |
2449 | WSAENAMETOOLONG , "Name is too long", | |
2450 | WSAEHOSTDOWN , "Host is down", | |
2451 | WSAEHOSTUNREACH , "No route to host", | |
2452 | WSAENOTEMPTY , "Buffer not empty", /* not sure */ | |
2453 | WSAEPROCLIM , "Too many processes", | |
2454 | WSAEUSERS , "Too many users", /* not sure */ | |
2455 | WSAEDQUOT , "Double quote in host name", /* really not sure */ | |
2456 | WSAESTALE , "Data is stale", /* not sure */ | |
2457 | WSAEREMOTE , "Remote error", /* not sure */ | |
2458 | ||
2459 | WSASYSNOTREADY , "Network subsystem is unavailable", | |
2460 | WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range", | |
2461 | WSANOTINITIALISED , "Winsock not initialized successfully", | |
2462 | WSAEDISCON , "Graceful shutdown in progress", | |
2463 | #ifdef WSAENOMORE | |
2464 | WSAENOMORE , "No more operations allowed", /* not sure */ | |
2465 | WSAECANCELLED , "Operation cancelled", /* not sure */ | |
2466 | WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider", | |
2467 | WSAEINVALIDPROVIDER , "Invalid service provider version number", | |
2468 | WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider", | |
2469 | WSASYSCALLFAILURE , "System call failured", | |
2470 | WSASERVICE_NOT_FOUND , "Service not found", /* not sure */ | |
2471 | WSATYPE_NOT_FOUND , "Class type not found", | |
2472 | WSA_E_NO_MORE , "No more resources available", /* really not sure */ | |
2473 | WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */ | |
2474 | WSAEREFUSED , "Operation refused", /* not sure */ | |
2475 | #endif | |
2476 | ||
2477 | WSAHOST_NOT_FOUND , "Host not found", | |
2478 | WSATRY_AGAIN , "Authoritative host not found during name lookup", | |
2479 | WSANO_RECOVERY , "Non-recoverable error during name lookup", | |
2480 | WSANO_DATA , "Valid name, no data record of requested type", | |
2481 | ||
2482 | -1, NULL | |
2483 | }; | |
2484 | ||
2485 | char * | |
2486 | sys_strerror(int error_no) | |
2487 | { | |
2488 | int i; | |
2489 | static char unknown_msg[40]; | |
2490 | ||
2491 | if (error_no >= 0 && error_no < _sys_nerr) | |
2492 | return _sys_errlist[error_no]; | |
2493 | ||
2494 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) | |
2495 | if (_wsa_errlist[i].errnum == error_no) | |
2496 | return _wsa_errlist[i].msg; | |
2497 | ||
2498 | sprintf(unknown_msg, "Unidentified error: %d", error_no); | |
2499 | return unknown_msg; | |
2500 | } | |
2501 | ||
480b0c5b GV |
2502 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
2503 | but I believe the method of keeping the socket handle separate (and | |
2504 | insuring it is not inheritable) is the correct one. */ | |
2505 | ||
2506 | //#define SOCK_REPLACE_HANDLE | |
2507 | ||
2508 | #ifdef SOCK_REPLACE_HANDLE | |
2509 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) | |
2510 | #else | |
2511 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) | |
2512 | #endif | |
2513 | ||
2514 | int | |
2515 | sys_socket(int af, int type, int protocol) | |
2516 | { | |
2517 | int fd; | |
2518 | long s; | |
2519 | child_process * cp; | |
2520 | ||
f249a012 | 2521 | if (winsock_lib == NULL) |
480b0c5b GV |
2522 | { |
2523 | h_errno = ENETDOWN; | |
2524 | return INVALID_SOCKET; | |
2525 | } | |
2526 | ||
2527 | check_errno (); | |
2528 | ||
2529 | /* call the real socket function */ | |
2530 | s = (long) pfn_socket (af, type, protocol); | |
2531 | ||
2532 | if (s != INVALID_SOCKET) | |
2533 | { | |
2534 | /* Although under NT 3.5 _open_osfhandle will accept a socket | |
2535 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, | |
2536 | that does not work under NT 3.1. However, we can get the same | |
2537 | effect by using a backdoor function to replace an existing | |
2538 | descriptor handle with the one we want. */ | |
2539 | ||
2540 | /* allocate a file descriptor (with appropriate flags) */ | |
2541 | fd = _open ("NUL:", _O_RDWR); | |
2542 | if (fd >= 0) | |
2543 | { | |
2544 | #ifdef SOCK_REPLACE_HANDLE | |
2545 | /* now replace handle to NUL with our socket handle */ | |
2546 | CloseHandle ((HANDLE) _get_osfhandle (fd)); | |
2547 | _free_osfhnd (fd); | |
2548 | _set_osfhnd (fd, s); | |
2549 | /* setmode (fd, _O_BINARY); */ | |
2550 | #else | |
2551 | /* Make a non-inheritable copy of the socket handle. */ | |
2552 | { | |
2553 | HANDLE parent; | |
2554 | HANDLE new_s = INVALID_HANDLE_VALUE; | |
2555 | ||
2556 | parent = GetCurrentProcess (); | |
2557 | ||
f1614061 RS |
2558 | /* Apparently there is a bug in NT 3.51 with some service |
2559 | packs, which prevents using DuplicateHandle to make a | |
2560 | socket handle non-inheritable (causes WSACleanup to | |
2561 | hang). The work-around is to use SetHandleInformation | |
2562 | instead if it is available and implemented. */ | |
2563 | if (!pfn_SetHandleInformation | |
2564 | || !pfn_SetHandleInformation ((HANDLE) s, | |
2565 | HANDLE_FLAG_INHERIT, | |
caf1a172 | 2566 | 0)) |
f1614061 RS |
2567 | { |
2568 | DuplicateHandle (parent, | |
2569 | (HANDLE) s, | |
2570 | parent, | |
2571 | &new_s, | |
2572 | 0, | |
2573 | FALSE, | |
2574 | DUPLICATE_SAME_ACCESS); | |
2575 | pfn_closesocket (s); | |
2576 | s = (SOCKET) new_s; | |
2577 | } | |
2578 | fd_info[fd].hnd = (HANDLE) s; | |
480b0c5b GV |
2579 | } |
2580 | #endif | |
2581 | ||
2582 | /* set our own internal flags */ | |
2583 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; | |
2584 | ||
2585 | cp = new_child (); | |
2586 | if (cp) | |
2587 | { | |
2588 | cp->fd = fd; | |
2589 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
2590 | ||
2591 | /* attach child_process to fd_info */ | |
2592 | if (fd_info[ fd ].cp != NULL) | |
2593 | { | |
2594 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); | |
2595 | abort (); | |
2596 | } | |
2597 | ||
2598 | fd_info[ fd ].cp = cp; | |
2599 | ||
2600 | /* success! */ | |
f249a012 | 2601 | winsock_inuse++; /* count open sockets */ |
480b0c5b GV |
2602 | return fd; |
2603 | } | |
2604 | ||
2605 | /* clean up */ | |
2606 | _close (fd); | |
2607 | } | |
2608 | pfn_closesocket (s); | |
2609 | h_errno = EMFILE; | |
2610 | } | |
2611 | set_errno (); | |
2612 | ||
2613 | return -1; | |
2614 | } | |
2615 | ||
2616 | ||
2617 | int | |
2618 | sys_bind (int s, const struct sockaddr * addr, int namelen) | |
2619 | { | |
f249a012 | 2620 | if (winsock_lib == NULL) |
480b0c5b GV |
2621 | { |
2622 | h_errno = ENOTSOCK; | |
2623 | return SOCKET_ERROR; | |
2624 | } | |
2625 | ||
2626 | check_errno (); | |
2627 | if (fd_info[s].flags & FILE_SOCKET) | |
2628 | { | |
2629 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); | |
2630 | if (rc == SOCKET_ERROR) | |
2631 | set_errno (); | |
2632 | return rc; | |
2633 | } | |
2634 | h_errno = ENOTSOCK; | |
2635 | return SOCKET_ERROR; | |
2636 | } | |
2637 | ||
2638 | ||
2639 | int | |
2640 | sys_connect (int s, const struct sockaddr * name, int namelen) | |
2641 | { | |
f249a012 | 2642 | if (winsock_lib == NULL) |
480b0c5b GV |
2643 | { |
2644 | h_errno = ENOTSOCK; | |
2645 | return SOCKET_ERROR; | |
2646 | } | |
2647 | ||
2648 | check_errno (); | |
2649 | if (fd_info[s].flags & FILE_SOCKET) | |
2650 | { | |
2651 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); | |
2652 | if (rc == SOCKET_ERROR) | |
2653 | set_errno (); | |
2654 | return rc; | |
2655 | } | |
2656 | h_errno = ENOTSOCK; | |
2657 | return SOCKET_ERROR; | |
2658 | } | |
2659 | ||
2660 | u_short | |
2661 | sys_htons (u_short hostshort) | |
2662 | { | |
f249a012 | 2663 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2664 | pfn_htons (hostshort) : hostshort; |
2665 | } | |
2666 | ||
2667 | u_short | |
2668 | sys_ntohs (u_short netshort) | |
2669 | { | |
f249a012 | 2670 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2671 | pfn_ntohs (netshort) : netshort; |
2672 | } | |
2673 | ||
2674 | unsigned long | |
2675 | sys_inet_addr (const char * cp) | |
2676 | { | |
f249a012 | 2677 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2678 | pfn_inet_addr (cp) : INADDR_NONE; |
2679 | } | |
2680 | ||
2681 | int | |
2682 | sys_gethostname (char * name, int namelen) | |
2683 | { | |
f249a012 | 2684 | if (winsock_lib != NULL) |
480b0c5b GV |
2685 | return pfn_gethostname (name, namelen); |
2686 | ||
2687 | if (namelen > MAX_COMPUTERNAME_LENGTH) | |
2688 | return !GetComputerName (name, &namelen); | |
2689 | ||
2690 | h_errno = EFAULT; | |
2691 | return SOCKET_ERROR; | |
2692 | } | |
2693 | ||
2694 | struct hostent * | |
2695 | sys_gethostbyname(const char * name) | |
2696 | { | |
2697 | struct hostent * host; | |
2698 | ||
f249a012 | 2699 | if (winsock_lib == NULL) |
480b0c5b GV |
2700 | { |
2701 | h_errno = ENETDOWN; | |
2702 | return NULL; | |
2703 | } | |
2704 | ||
2705 | check_errno (); | |
2706 | host = pfn_gethostbyname (name); | |
2707 | if (!host) | |
2708 | set_errno (); | |
2709 | return host; | |
2710 | } | |
2711 | ||
2712 | struct servent * | |
2713 | sys_getservbyname(const char * name, const char * proto) | |
2714 | { | |
2715 | struct servent * serv; | |
2716 | ||
f249a012 | 2717 | if (winsock_lib == NULL) |
480b0c5b GV |
2718 | { |
2719 | h_errno = ENETDOWN; | |
2720 | return NULL; | |
2721 | } | |
2722 | ||
2723 | check_errno (); | |
2724 | serv = pfn_getservbyname (name, proto); | |
2725 | if (!serv) | |
2726 | set_errno (); | |
2727 | return serv; | |
2728 | } | |
2729 | ||
380961a6 GV |
2730 | int |
2731 | sys_shutdown (int s, int how) | |
2732 | { | |
2733 | int rc; | |
2734 | ||
2735 | if (winsock_lib == NULL) | |
2736 | { | |
2737 | h_errno = ENETDOWN; | |
2738 | return SOCKET_ERROR; | |
2739 | } | |
2740 | ||
2741 | check_errno (); | |
2742 | if (fd_info[s].flags & FILE_SOCKET) | |
2743 | { | |
2744 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); | |
2745 | if (rc == SOCKET_ERROR) | |
2746 | set_errno (); | |
2747 | return rc; | |
2748 | } | |
2749 | h_errno = ENOTSOCK; | |
2750 | return SOCKET_ERROR; | |
2751 | } | |
2752 | ||
480b0c5b GV |
2753 | #endif /* HAVE_SOCKETS */ |
2754 | ||
2755 | ||
2756 | /* Shadow main io functions: we need to handle pipes and sockets more | |
2757 | intelligently, and implement non-blocking mode as well. */ | |
2758 | ||
2759 | int | |
2760 | sys_close (int fd) | |
2761 | { | |
2762 | int rc; | |
2763 | ||
2764 | if (fd < 0 || fd >= MAXDESC) | |
2765 | { | |
2766 | errno = EBADF; | |
2767 | return -1; | |
2768 | } | |
2769 | ||
2770 | if (fd_info[fd].cp) | |
2771 | { | |
2772 | child_process * cp = fd_info[fd].cp; | |
2773 | ||
2774 | fd_info[fd].cp = NULL; | |
2775 | ||
2776 | if (CHILD_ACTIVE (cp)) | |
2777 | { | |
2778 | /* if last descriptor to active child_process then cleanup */ | |
2779 | int i; | |
2780 | for (i = 0; i < MAXDESC; i++) | |
2781 | { | |
2782 | if (i == fd) | |
2783 | continue; | |
2784 | if (fd_info[i].cp == cp) | |
2785 | break; | |
2786 | } | |
2787 | if (i == MAXDESC) | |
2788 | { | |
f249a012 | 2789 | #ifdef HAVE_SOCKETS |
480b0c5b GV |
2790 | if (fd_info[fd].flags & FILE_SOCKET) |
2791 | { | |
f249a012 RS |
2792 | #ifndef SOCK_REPLACE_HANDLE |
2793 | if (winsock_lib == NULL) abort (); | |
480b0c5b GV |
2794 | |
2795 | pfn_shutdown (SOCK_HANDLE (fd), 2); | |
2796 | rc = pfn_closesocket (SOCK_HANDLE (fd)); | |
f249a012 RS |
2797 | #endif |
2798 | winsock_inuse--; /* count open sockets */ | |
480b0c5b GV |
2799 | } |
2800 | #endif | |
2801 | delete_child (cp); | |
2802 | } | |
2803 | } | |
2804 | } | |
2805 | ||
2806 | /* Note that sockets do not need special treatment here (at least on | |
e9e23e23 | 2807 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
480b0c5b GV |
2808 | closesocket is equivalent to CloseHandle, which is to be expected |
2809 | because socket handles are fully fledged kernel handles. */ | |
2810 | rc = _close (fd); | |
2811 | ||
2812 | if (rc == 0) | |
2813 | fd_info[fd].flags = 0; | |
2814 | ||
2815 | return rc; | |
2816 | } | |
2817 | ||
2818 | int | |
2819 | sys_dup (int fd) | |
2820 | { | |
2821 | int new_fd; | |
2822 | ||
2823 | new_fd = _dup (fd); | |
2824 | if (new_fd >= 0) | |
2825 | { | |
2826 | /* duplicate our internal info as well */ | |
2827 | fd_info[new_fd] = fd_info[fd]; | |
2828 | } | |
2829 | return new_fd; | |
2830 | } | |
2831 | ||
2832 | ||
2833 | int | |
2834 | sys_dup2 (int src, int dst) | |
2835 | { | |
2836 | int rc; | |
2837 | ||
2838 | if (dst < 0 || dst >= MAXDESC) | |
2839 | { | |
2840 | errno = EBADF; | |
2841 | return -1; | |
2842 | } | |
2843 | ||
2844 | /* make sure we close the destination first if it's a pipe or socket */ | |
2845 | if (src != dst && fd_info[dst].flags != 0) | |
2846 | sys_close (dst); | |
2847 | ||
2848 | rc = _dup2 (src, dst); | |
2849 | if (rc == 0) | |
2850 | { | |
2851 | /* duplicate our internal info as well */ | |
2852 | fd_info[dst] = fd_info[src]; | |
2853 | } | |
2854 | return rc; | |
2855 | } | |
2856 | ||
480b0c5b GV |
2857 | /* Unix pipe() has only one arg */ |
2858 | int | |
2859 | sys_pipe (int * phandles) | |
2860 | { | |
2861 | int rc; | |
2862 | unsigned flags; | |
2863 | child_process * cp; | |
2864 | ||
76b3903d GV |
2865 | /* make pipe handles non-inheritable; when we spawn a child, we |
2866 | replace the relevant handle with an inheritable one. Also put | |
2867 | pipes into binary mode; we will do text mode translation ourselves | |
2868 | if required. */ | |
2869 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); | |
480b0c5b GV |
2870 | |
2871 | if (rc == 0) | |
2872 | { | |
7664e306 | 2873 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
480b0c5b GV |
2874 | fd_info[phandles[0]].flags = flags; |
2875 | ||
7664e306 | 2876 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
480b0c5b GV |
2877 | fd_info[phandles[1]].flags = flags; |
2878 | } | |
2879 | ||
2880 | return rc; | |
2881 | } | |
2882 | ||
f7554349 | 2883 | /* From ntproc.c */ |
fbd6baed | 2884 | extern Lisp_Object Vw32_pipe_read_delay; |
f7554349 | 2885 | |
480b0c5b GV |
2886 | /* Function to do blocking read of one byte, needed to implement |
2887 | select. It is only allowed on sockets and pipes. */ | |
2888 | int | |
2889 | _sys_read_ahead (int fd) | |
2890 | { | |
2891 | child_process * cp; | |
2892 | int rc; | |
2893 | ||
2894 | if (fd < 0 || fd >= MAXDESC) | |
2895 | return STATUS_READ_ERROR; | |
2896 | ||
2897 | cp = fd_info[fd].cp; | |
2898 | ||
2899 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) | |
2900 | return STATUS_READ_ERROR; | |
2901 | ||
2902 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 | |
2903 | || (fd_info[fd].flags & FILE_READ) == 0) | |
2904 | { | |
2905 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); | |
2906 | abort (); | |
2907 | } | |
2908 | ||
2909 | cp->status = STATUS_READ_IN_PROGRESS; | |
2910 | ||
2911 | if (fd_info[fd].flags & FILE_PIPE) | |
f7554349 | 2912 | { |
f7554349 KH |
2913 | rc = _read (fd, &cp->chr, sizeof (char)); |
2914 | ||
2915 | /* Give subprocess time to buffer some more output for us before | |
e9e23e23 | 2916 | reporting that input is available; we need this because Windows 95 |
f7554349 KH |
2917 | connects DOS programs to pipes by making the pipe appear to be |
2918 | the normal console stdout - as a result most DOS programs will | |
2919 | write to stdout without buffering, ie. one character at a | |
fbd6baed | 2920 | time. Even some W32 programs do this - "dir" in a command |
f7554349 KH |
2921 | shell on NT is very slow if we don't do this. */ |
2922 | if (rc > 0) | |
2923 | { | |
fbd6baed | 2924 | int wait = XINT (Vw32_pipe_read_delay); |
f7554349 KH |
2925 | |
2926 | if (wait > 0) | |
2927 | Sleep (wait); | |
2928 | else if (wait < 0) | |
2929 | while (++wait <= 0) | |
2930 | /* Yield remainder of our time slice, effectively giving a | |
2931 | temporary priority boost to the child process. */ | |
2932 | Sleep (0); | |
2933 | } | |
2934 | } | |
480b0c5b GV |
2935 | #ifdef HAVE_SOCKETS |
2936 | else if (fd_info[fd].flags & FILE_SOCKET) | |
2937 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); | |
2938 | #endif | |
2939 | ||
2940 | if (rc == sizeof (char)) | |
2941 | cp->status = STATUS_READ_SUCCEEDED; | |
2942 | else | |
2943 | cp->status = STATUS_READ_FAILED; | |
2944 | ||
2945 | return cp->status; | |
2946 | } | |
2947 | ||
2948 | int | |
2949 | sys_read (int fd, char * buffer, unsigned int count) | |
2950 | { | |
2951 | int nchars; | |
480b0c5b GV |
2952 | int to_read; |
2953 | DWORD waiting; | |
76b3903d | 2954 | char * orig_buffer = buffer; |
480b0c5b GV |
2955 | |
2956 | if (fd < 0 || fd >= MAXDESC) | |
2957 | { | |
2958 | errno = EBADF; | |
2959 | return -1; | |
2960 | } | |
2961 | ||
2962 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
2963 | { | |
2964 | child_process *cp = fd_info[fd].cp; | |
2965 | ||
2966 | if ((fd_info[fd].flags & FILE_READ) == 0) | |
2967 | { | |
2968 | errno = EBADF; | |
2969 | return -1; | |
2970 | } | |
2971 | ||
76b3903d GV |
2972 | nchars = 0; |
2973 | ||
2974 | /* re-read CR carried over from last read */ | |
2975 | if (fd_info[fd].flags & FILE_LAST_CR) | |
2976 | { | |
2977 | if (fd_info[fd].flags & FILE_BINARY) abort (); | |
2978 | *buffer++ = 0x0d; | |
2979 | count--; | |
2980 | nchars++; | |
f52eb3ef | 2981 | fd_info[fd].flags &= ~FILE_LAST_CR; |
76b3903d GV |
2982 | } |
2983 | ||
480b0c5b GV |
2984 | /* presence of a child_process structure means we are operating in |
2985 | non-blocking mode - otherwise we just call _read directly. | |
2986 | Note that the child_process structure might be missing because | |
2987 | reap_subprocess has been called; in this case the pipe is | |
2988 | already broken, so calling _read on it is okay. */ | |
2989 | if (cp) | |
2990 | { | |
2991 | int current_status = cp->status; | |
2992 | ||
2993 | switch (current_status) | |
2994 | { | |
2995 | case STATUS_READ_FAILED: | |
2996 | case STATUS_READ_ERROR: | |
f52eb3ef GV |
2997 | /* report normal EOF if nothing in buffer */ |
2998 | if (nchars <= 0) | |
2999 | fd_info[fd].flags |= FILE_AT_EOF; | |
3000 | return nchars; | |
480b0c5b GV |
3001 | |
3002 | case STATUS_READ_READY: | |
3003 | case STATUS_READ_IN_PROGRESS: | |
3004 | DebPrint (("sys_read called when read is in progress\n")); | |
3005 | errno = EWOULDBLOCK; | |
3006 | return -1; | |
3007 | ||
3008 | case STATUS_READ_SUCCEEDED: | |
3009 | /* consume read-ahead char */ | |
3010 | *buffer++ = cp->chr; | |
3011 | count--; | |
76b3903d | 3012 | nchars++; |
480b0c5b GV |
3013 | cp->status = STATUS_READ_ACKNOWLEDGED; |
3014 | ResetEvent (cp->char_avail); | |
3015 | ||
3016 | case STATUS_READ_ACKNOWLEDGED: | |
3017 | break; | |
3018 | ||
3019 | default: | |
3020 | DebPrint (("sys_read: bad status %d\n", current_status)); | |
3021 | errno = EBADF; | |
3022 | return -1; | |
3023 | } | |
3024 | ||
3025 | if (fd_info[fd].flags & FILE_PIPE) | |
3026 | { | |
3027 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); | |
3028 | to_read = min (waiting, (DWORD) count); | |
f52eb3ef GV |
3029 | |
3030 | if (to_read > 0) | |
3031 | nchars += _read (fd, buffer, to_read); | |
480b0c5b GV |
3032 | } |
3033 | #ifdef HAVE_SOCKETS | |
3034 | else /* FILE_SOCKET */ | |
3035 | { | |
f249a012 | 3036 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3037 | |
3038 | /* do the equivalent of a non-blocking read */ | |
3039 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); | |
76b3903d | 3040 | if (waiting == 0 && nchars == 0) |
480b0c5b GV |
3041 | { |
3042 | h_errno = errno = EWOULDBLOCK; | |
3043 | return -1; | |
3044 | } | |
3045 | ||
480b0c5b GV |
3046 | if (waiting) |
3047 | { | |
3048 | /* always use binary mode for sockets */ | |
76b3903d GV |
3049 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
3050 | if (res == SOCKET_ERROR) | |
480b0c5b GV |
3051 | { |
3052 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", | |
3053 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
76b3903d GV |
3054 | set_errno (); |
3055 | return -1; | |
480b0c5b | 3056 | } |
76b3903d | 3057 | nchars += res; |
480b0c5b GV |
3058 | } |
3059 | } | |
3060 | #endif | |
3061 | } | |
3062 | else | |
f52eb3ef GV |
3063 | { |
3064 | int nread = _read (fd, buffer, count); | |
3065 | if (nread >= 0) | |
3066 | nchars += nread; | |
3067 | else if (nchars == 0) | |
3068 | nchars = nread; | |
3069 | } | |
76b3903d | 3070 | |
f52eb3ef GV |
3071 | if (nchars <= 0) |
3072 | fd_info[fd].flags |= FILE_AT_EOF; | |
76b3903d | 3073 | /* Perform text mode translation if required. */ |
f52eb3ef | 3074 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
76b3903d GV |
3075 | { |
3076 | nchars = crlf_to_lf (nchars, orig_buffer); | |
3077 | /* If buffer contains only CR, return that. To be absolutely | |
3078 | sure we should attempt to read the next char, but in | |
3079 | practice a CR to be followed by LF would not appear by | |
3080 | itself in the buffer. */ | |
3081 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) | |
3082 | { | |
3083 | fd_info[fd].flags |= FILE_LAST_CR; | |
3084 | nchars--; | |
3085 | } | |
76b3903d | 3086 | } |
480b0c5b GV |
3087 | } |
3088 | else | |
3089 | nchars = _read (fd, buffer, count); | |
3090 | ||
76b3903d | 3091 | return nchars; |
480b0c5b GV |
3092 | } |
3093 | ||
3094 | /* For now, don't bother with a non-blocking mode */ | |
3095 | int | |
3096 | sys_write (int fd, const void * buffer, unsigned int count) | |
3097 | { | |
3098 | int nchars; | |
3099 | ||
3100 | if (fd < 0 || fd >= MAXDESC) | |
3101 | { | |
3102 | errno = EBADF; | |
3103 | return -1; | |
3104 | } | |
3105 | ||
3106 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
76b3903d GV |
3107 | { |
3108 | if ((fd_info[fd].flags & FILE_WRITE) == 0) | |
3109 | { | |
3110 | errno = EBADF; | |
3111 | return -1; | |
3112 | } | |
3113 | ||
3114 | /* Perform text mode translation if required. */ | |
3115 | if ((fd_info[fd].flags & FILE_BINARY) == 0) | |
3116 | { | |
3117 | char * tmpbuf = alloca (count * 2); | |
3118 | unsigned char * src = (void *)buffer; | |
3119 | unsigned char * dst = tmpbuf; | |
3120 | int nbytes = count; | |
3121 | ||
3122 | while (1) | |
3123 | { | |
3124 | unsigned char *next; | |
3125 | /* copy next line or remaining bytes */ | |
3126 | next = _memccpy (dst, src, '\n', nbytes); | |
3127 | if (next) | |
3128 | { | |
3129 | /* copied one line ending with '\n' */ | |
3130 | int copied = next - dst; | |
3131 | nbytes -= copied; | |
3132 | src += copied; | |
3133 | /* insert '\r' before '\n' */ | |
3134 | next[-1] = '\r'; | |
3135 | next[0] = '\n'; | |
3136 | dst = next + 1; | |
3137 | count++; | |
3138 | } | |
3139 | else | |
3140 | /* copied remaining partial line -> now finished */ | |
3141 | break; | |
3142 | } | |
3143 | buffer = tmpbuf; | |
3144 | } | |
3145 | } | |
3146 | ||
480b0c5b GV |
3147 | #ifdef HAVE_SOCKETS |
3148 | if (fd_info[fd].flags & FILE_SOCKET) | |
3149 | { | |
f249a012 | 3150 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3151 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
3152 | if (nchars == SOCKET_ERROR) | |
3153 | { | |
3154 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", | |
3155 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
3156 | set_errno (); | |
3157 | } | |
3158 | } | |
3159 | else | |
3160 | #endif | |
3161 | nchars = _write (fd, buffer, count); | |
3162 | ||
3163 | return nchars; | |
3164 | } | |
3165 | ||
f52eb3ef GV |
3166 | static void |
3167 | check_windows_init_file () | |
3168 | { | |
3169 | extern int noninteractive, inhibit_window_system; | |
3170 | ||
3171 | /* A common indication that Emacs is not installed properly is when | |
3172 | it cannot find the Windows installation file. If this file does | |
3173 | not exist in the expected place, tell the user. */ | |
3174 | ||
d54abccd GV |
3175 | if (!noninteractive && !inhibit_window_system) |
3176 | { | |
3177 | extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p; | |
a0b9c838 | 3178 | Lisp_Object objs[2]; |
96ef7d42 | 3179 | Lisp_Object full_load_path; |
d54abccd GV |
3180 | Lisp_Object init_file; |
3181 | int fd; | |
f52eb3ef | 3182 | |
a0b9c838 GV |
3183 | objs[0] = Vload_path; |
3184 | objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH"))); | |
3185 | full_load_path = Fappend (2, objs); | |
d54abccd | 3186 | init_file = build_string ("term/w32-win"); |
96ef7d42 | 3187 | fd = openp (full_load_path, init_file, ".el:.elc", NULL, 0); |
d54abccd GV |
3188 | if (fd < 0) |
3189 | { | |
96ef7d42 | 3190 | Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil); |
d54abccd GV |
3191 | char *init_file_name = XSTRING (init_file)->data; |
3192 | char *load_path = XSTRING (load_path_print)->data; | |
3193 | char *buffer = alloca (1024); | |
3194 | ||
3195 | sprintf (buffer, | |
3196 | "The Emacs Windows initialization file \"%s.el\" " | |
3197 | "could not be found in your Emacs installation. " | |
3198 | "Emacs checked the following directories for this file:\n" | |
3199 | "\n%s\n\n" | |
3200 | "When Emacs cannot find this file, it usually means that it " | |
3201 | "was not installed properly, or its distribution file was " | |
3202 | "not unpacked properly.\nSee the README.W32 file in the " | |
3203 | "top-level Emacs directory for more information.", | |
3204 | init_file_name, load_path); | |
3205 | MessageBox (NULL, | |
3206 | buffer, | |
3207 | "Emacs Abort Dialog", | |
3208 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); | |
f52eb3ef GV |
3209 | /* Use the low-level Emacs abort. */ |
3210 | #undef abort | |
d54abccd GV |
3211 | abort (); |
3212 | } | |
3213 | else | |
3214 | { | |
3215 | close (fd); | |
3216 | } | |
f52eb3ef | 3217 | } |
f52eb3ef | 3218 | } |
480b0c5b GV |
3219 | |
3220 | void | |
3221 | term_ntproc () | |
3222 | { | |
3223 | #ifdef HAVE_SOCKETS | |
3224 | /* shutdown the socket interface if necessary */ | |
3225 | term_winsock (); | |
3226 | #endif | |
3227 | } | |
3228 | ||
3229 | void | |
3230 | init_ntproc () | |
3231 | { | |
3232 | #ifdef HAVE_SOCKETS | |
f249a012 RS |
3233 | /* Initialise the socket interface now if available and requested by |
3234 | the user by defining PRELOAD_WINSOCK; otherwise loading will be | |
fbd6baed | 3235 | delayed until open-network-stream is called (w32-has-winsock can |
f249a012 RS |
3236 | also be used to dynamically load or reload winsock). |
3237 | ||
3238 | Conveniently, init_environment is called before us, so | |
3239 | PRELOAD_WINSOCK can be set in the registry. */ | |
3240 | ||
3241 | /* Always initialize this correctly. */ | |
3242 | winsock_lib = NULL; | |
3243 | ||
3244 | if (getenv ("PRELOAD_WINSOCK") != NULL) | |
3245 | init_winsock (TRUE); | |
480b0c5b GV |
3246 | #endif |
3247 | ||
3248 | /* Initial preparation for subprocess support: replace our standard | |
3249 | handles with non-inheritable versions. */ | |
3250 | { | |
3251 | HANDLE parent; | |
3252 | HANDLE stdin_save = INVALID_HANDLE_VALUE; | |
3253 | HANDLE stdout_save = INVALID_HANDLE_VALUE; | |
3254 | HANDLE stderr_save = INVALID_HANDLE_VALUE; | |
3255 | ||
3256 | parent = GetCurrentProcess (); | |
3257 | ||
3258 | /* ignore errors when duplicating and closing; typically the | |
3259 | handles will be invalid when running as a gui program. */ | |
3260 | DuplicateHandle (parent, | |
3261 | GetStdHandle (STD_INPUT_HANDLE), | |
3262 | parent, | |
3263 | &stdin_save, | |
3264 | 0, | |
3265 | FALSE, | |
3266 | DUPLICATE_SAME_ACCESS); | |
3267 | ||
3268 | DuplicateHandle (parent, | |
3269 | GetStdHandle (STD_OUTPUT_HANDLE), | |
3270 | parent, | |
3271 | &stdout_save, | |
3272 | 0, | |
3273 | FALSE, | |
3274 | DUPLICATE_SAME_ACCESS); | |
3275 | ||
3276 | DuplicateHandle (parent, | |
3277 | GetStdHandle (STD_ERROR_HANDLE), | |
3278 | parent, | |
3279 | &stderr_save, | |
3280 | 0, | |
3281 | FALSE, | |
3282 | DUPLICATE_SAME_ACCESS); | |
3283 | ||
3284 | fclose (stdin); | |
3285 | fclose (stdout); | |
3286 | fclose (stderr); | |
3287 | ||
3288 | if (stdin_save != INVALID_HANDLE_VALUE) | |
3289 | _open_osfhandle ((long) stdin_save, O_TEXT); | |
3290 | else | |
76b3903d GV |
3291 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
3292 | _fdopen (0, "r"); | |
480b0c5b GV |
3293 | |
3294 | if (stdout_save != INVALID_HANDLE_VALUE) | |
3295 | _open_osfhandle ((long) stdout_save, O_TEXT); | |
3296 | else | |
76b3903d GV |
3297 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3298 | _fdopen (1, "w"); | |
480b0c5b GV |
3299 | |
3300 | if (stderr_save != INVALID_HANDLE_VALUE) | |
3301 | _open_osfhandle ((long) stderr_save, O_TEXT); | |
3302 | else | |
76b3903d GV |
3303 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3304 | _fdopen (2, "w"); | |
480b0c5b GV |
3305 | } |
3306 | ||
3307 | /* unfortunately, atexit depends on implementation of malloc */ | |
3308 | /* atexit (term_ntproc); */ | |
3309 | signal (SIGABRT, term_ntproc); | |
76b3903d GV |
3310 | |
3311 | /* determine which drives are fixed, for GetCachedVolumeInformation */ | |
3312 | { | |
3313 | /* GetDriveType must have trailing backslash. */ | |
3314 | char drive[] = "A:\\"; | |
3315 | ||
3316 | /* Loop over all possible drive letters */ | |
3317 | while (*drive <= 'Z') | |
3318 | { | |
3319 | /* Record if this drive letter refers to a fixed drive. */ | |
3320 | fixed_drives[DRIVE_INDEX (*drive)] = | |
3321 | (GetDriveType (drive) == DRIVE_FIXED); | |
3322 | ||
3323 | (*drive)++; | |
3324 | } | |
3325 | } | |
d54abccd GV |
3326 | |
3327 | /* Check to see if Emacs has been installed correctly. */ | |
3328 | check_windows_init_file (); | |
480b0c5b GV |
3329 | } |
3330 | ||
3331 | /* end of nt.c */ |