Commit | Line | Data |
---|---|---|
e9e23e23 | 1 | /* Utility and Unix shadow routines for GNU Emacs on the Microsoft W32 API. |
302f0b29 | 2 | Copyright (C) 1994, 1995, 2000, 2001 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 */ | |
4838e624 PJ |
38 | |
39 | #ifdef HAVE_CONFIG_H | |
40 | #include <config.h> | |
41 | #endif | |
42 | ||
480b0c5b GV |
43 | #undef access |
44 | #undef chdir | |
45 | #undef chmod | |
46 | #undef creat | |
47 | #undef ctime | |
48 | #undef fopen | |
49 | #undef link | |
50 | #undef mkdir | |
51 | #undef mktemp | |
52 | #undef open | |
53 | #undef rename | |
54 | #undef rmdir | |
55 | #undef unlink | |
56 | ||
57 | #undef close | |
58 | #undef dup | |
59 | #undef dup2 | |
60 | #undef pipe | |
61 | #undef read | |
62 | #undef write | |
95ed0025 | 63 | |
d8fcc1b9 AI |
64 | #undef strerror |
65 | ||
95ed0025 | 66 | #include "lisp.h" |
95ed0025 RS |
67 | |
68 | #include <pwd.h> | |
69 | ||
971bce75 AI |
70 | #ifdef __GNUC__ |
71 | #define _ANONYMOUS_UNION | |
72 | #define _ANONYMOUS_STRUCT | |
73 | #endif | |
480b0c5b | 74 | #include <windows.h> |
00b3b7b3 | 75 | |
480b0c5b GV |
76 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
77 | #include <sys/socket.h> | |
78 | #undef socket | |
79 | #undef bind | |
80 | #undef connect | |
81 | #undef htons | |
82 | #undef ntohs | |
83 | #undef inet_addr | |
84 | #undef gethostname | |
85 | #undef gethostbyname | |
86 | #undef getservbyname | |
ecd270eb | 87 | #undef getpeername |
380961a6 | 88 | #undef shutdown |
962955c5 JR |
89 | #undef setsockopt |
90 | #undef listen | |
91 | #undef getsockname | |
92 | #undef accept | |
93 | #undef recvfrom | |
94 | #undef sendto | |
480b0c5b | 95 | #endif |
00b3b7b3 | 96 | |
489f9371 | 97 | #include "w32.h" |
480b0c5b | 98 | #include "ndir.h" |
489f9371 | 99 | #include "w32heap.h" |
253574a6 JR |
100 | #include "systime.h" |
101 | ||
76b3903d GV |
102 | extern Lisp_Object Vw32_downcase_file_names; |
103 | extern Lisp_Object Vw32_generate_fake_inodes; | |
104 | extern Lisp_Object Vw32_get_true_file_attributes; | |
20af4831 | 105 | extern Lisp_Object Vw32_num_mouse_buttons; |
76b3903d | 106 | |
18e070ac AI |
107 | \f |
108 | /* Equivalent of strerror for W32 error codes. */ | |
109 | char * | |
110 | w32_strerror (int error_no) | |
111 | { | |
112 | static char buf[500]; | |
113 | ||
114 | if (error_no == 0) | |
115 | error_no = GetLastError (); | |
116 | ||
117 | buf[0] = '\0'; | |
118 | if (!FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, | |
119 | error_no, | |
120 | 0, /* choose most suitable language */ | |
121 | buf, sizeof (buf), NULL)) | |
122 | sprintf (buf, "w32 error %u", error_no); | |
123 | return buf; | |
124 | } | |
125 | ||
76b3903d | 126 | static char startup_dir[MAXPATHLEN]; |
00b3b7b3 | 127 | |
95ed0025 | 128 | /* Get the current working directory. */ |
480b0c5b | 129 | char * |
95ed0025 RS |
130 | getwd (char *dir) |
131 | { | |
76b3903d | 132 | #if 0 |
480b0c5b GV |
133 | if (GetCurrentDirectory (MAXPATHLEN, dir) > 0) |
134 | return dir; | |
135 | return NULL; | |
76b3903d GV |
136 | #else |
137 | /* Emacs doesn't actually change directory itself, and we want to | |
138 | force our real wd to be where emacs.exe is to avoid unnecessary | |
139 | conflicts when trying to rename or delete directories. */ | |
140 | strcpy (dir, startup_dir); | |
141 | return dir; | |
142 | #endif | |
95ed0025 RS |
143 | } |
144 | ||
480b0c5b | 145 | #ifndef HAVE_SOCKETS |
95ed0025 RS |
146 | /* Emulate gethostname. */ |
147 | int | |
148 | gethostname (char *buffer, int size) | |
149 | { | |
150 | /* NT only allows small host names, so the buffer is | |
151 | certainly large enough. */ | |
152 | return !GetComputerName (buffer, &size); | |
153 | } | |
480b0c5b | 154 | #endif /* HAVE_SOCKETS */ |
95ed0025 RS |
155 | |
156 | /* Emulate getloadavg. */ | |
157 | int | |
158 | getloadavg (double loadavg[], int nelem) | |
159 | { | |
160 | int i; | |
161 | ||
162 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
163 | for (i = 0; i < nelem; i++) | |
164 | { | |
165 | loadavg[i] = 0.0; | |
166 | } | |
167 | return i; | |
168 | } | |
169 | ||
480b0c5b | 170 | /* Emulate getpwuid, getpwnam and others. */ |
95ed0025 | 171 | |
051fe60d GV |
172 | #define PASSWD_FIELD_SIZE 256 |
173 | ||
174 | static char the_passwd_name[PASSWD_FIELD_SIZE]; | |
175 | static char the_passwd_passwd[PASSWD_FIELD_SIZE]; | |
176 | static char the_passwd_gecos[PASSWD_FIELD_SIZE]; | |
177 | static char the_passwd_dir[PASSWD_FIELD_SIZE]; | |
178 | static char the_passwd_shell[PASSWD_FIELD_SIZE]; | |
95ed0025 RS |
179 | |
180 | static struct passwd the_passwd = | |
181 | { | |
182 | the_passwd_name, | |
183 | the_passwd_passwd, | |
184 | 0, | |
185 | 0, | |
186 | 0, | |
187 | the_passwd_gecos, | |
188 | the_passwd_dir, | |
189 | the_passwd_shell, | |
190 | }; | |
191 | ||
480b0c5b GV |
192 | int |
193 | getuid () | |
194 | { | |
195 | return the_passwd.pw_uid; | |
196 | } | |
197 | ||
198 | int | |
199 | geteuid () | |
200 | { | |
201 | /* I could imagine arguing for checking to see whether the user is | |
202 | in the Administrators group and returning a UID of 0 for that | |
203 | case, but I don't know how wise that would be in the long run. */ | |
204 | return getuid (); | |
205 | } | |
206 | ||
207 | int | |
208 | getgid () | |
209 | { | |
210 | return the_passwd.pw_gid; | |
211 | } | |
212 | ||
213 | int | |
214 | getegid () | |
215 | { | |
216 | return getgid (); | |
217 | } | |
218 | ||
95ed0025 RS |
219 | struct passwd * |
220 | getpwuid (int uid) | |
221 | { | |
480b0c5b GV |
222 | if (uid == the_passwd.pw_uid) |
223 | return &the_passwd; | |
224 | return NULL; | |
95ed0025 RS |
225 | } |
226 | ||
227 | struct passwd * | |
228 | getpwnam (char *name) | |
229 | { | |
230 | struct passwd *pw; | |
231 | ||
232 | pw = getpwuid (getuid ()); | |
233 | if (!pw) | |
234 | return pw; | |
235 | ||
480b0c5b | 236 | if (stricmp (name, pw->pw_name)) |
95ed0025 RS |
237 | return NULL; |
238 | ||
239 | return pw; | |
240 | } | |
241 | ||
480b0c5b GV |
242 | void |
243 | init_user_info () | |
95ed0025 | 244 | { |
480b0c5b GV |
245 | /* Find the user's real name by opening the process token and |
246 | looking up the name associated with the user-sid in that token. | |
247 | ||
248 | Use the relative portion of the identifier authority value from | |
249 | the user-sid as the user id value (same for group id using the | |
250 | primary group sid from the process token). */ | |
251 | ||
252 | char user_sid[256], name[256], domain[256]; | |
253 | DWORD length = sizeof (name), dlength = sizeof (domain), trash; | |
254 | HANDLE token = NULL; | |
255 | SID_NAME_USE user_type; | |
256 | ||
257 | if (OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &token) | |
258 | && GetTokenInformation (token, TokenUser, | |
259 | (PVOID) user_sid, sizeof (user_sid), &trash) | |
260 | && LookupAccountSid (NULL, *((PSID *) user_sid), name, &length, | |
261 | domain, &dlength, &user_type)) | |
d1c1c3d2 | 262 | { |
480b0c5b GV |
263 | strcpy (the_passwd.pw_name, name); |
264 | /* Determine a reasonable uid value. */ | |
265 | if (stricmp ("administrator", name) == 0) | |
266 | { | |
267 | the_passwd.pw_uid = 0; | |
268 | the_passwd.pw_gid = 0; | |
269 | } | |
270 | else | |
271 | { | |
272 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
273 | ||
274 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
275 | /* I believe the relative portion is the last 4 bytes (of 6) | |
276 | with msb first. */ | |
277 | the_passwd.pw_uid = ((pSIA->Value[2] << 24) + | |
278 | (pSIA->Value[3] << 16) + | |
279 | (pSIA->Value[4] << 8) + | |
280 | (pSIA->Value[5] << 0)); | |
281 | /* restrict to conventional uid range for normal users */ | |
282 | the_passwd.pw_uid = the_passwd.pw_uid % 60001; | |
283 | ||
284 | /* Get group id */ | |
285 | if (GetTokenInformation (token, TokenPrimaryGroup, | |
286 | (PVOID) user_sid, sizeof (user_sid), &trash)) | |
287 | { | |
288 | SID_IDENTIFIER_AUTHORITY * pSIA; | |
289 | ||
290 | pSIA = GetSidIdentifierAuthority (*((PSID *) user_sid)); | |
291 | the_passwd.pw_gid = ((pSIA->Value[2] << 24) + | |
292 | (pSIA->Value[3] << 16) + | |
293 | (pSIA->Value[4] << 8) + | |
294 | (pSIA->Value[5] << 0)); | |
295 | /* I don't know if this is necessary, but for safety... */ | |
296 | the_passwd.pw_gid = the_passwd.pw_gid % 60001; | |
297 | } | |
298 | else | |
299 | the_passwd.pw_gid = the_passwd.pw_uid; | |
300 | } | |
301 | } | |
302 | /* If security calls are not supported (presumably because we | |
303 | are running under Windows 95), fallback to this. */ | |
304 | else if (GetUserName (name, &length)) | |
305 | { | |
306 | strcpy (the_passwd.pw_name, name); | |
307 | if (stricmp ("administrator", name) == 0) | |
308 | the_passwd.pw_uid = 0; | |
309 | else | |
310 | the_passwd.pw_uid = 123; | |
311 | the_passwd.pw_gid = the_passwd.pw_uid; | |
312 | } | |
313 | else | |
314 | { | |
315 | strcpy (the_passwd.pw_name, "unknown"); | |
316 | the_passwd.pw_uid = 123; | |
317 | the_passwd.pw_gid = 123; | |
d1c1c3d2 | 318 | } |
95ed0025 | 319 | |
480b0c5b GV |
320 | /* Ensure HOME and SHELL are defined. */ |
321 | if (getenv ("HOME") == NULL) | |
ca149beb | 322 | abort (); |
480b0c5b | 323 | if (getenv ("SHELL") == NULL) |
ca149beb | 324 | abort (); |
95ed0025 | 325 | |
480b0c5b GV |
326 | /* Set dir and shell from environment variables. */ |
327 | strcpy (the_passwd.pw_dir, getenv ("HOME")); | |
328 | strcpy (the_passwd.pw_shell, getenv ("SHELL")); | |
bd4a449f | 329 | |
480b0c5b GV |
330 | if (token) |
331 | CloseHandle (token); | |
95ed0025 RS |
332 | } |
333 | ||
95ed0025 | 334 | int |
480b0c5b | 335 | random () |
95ed0025 | 336 | { |
480b0c5b GV |
337 | /* rand () on NT gives us 15 random bits...hack together 30 bits. */ |
338 | return ((rand () << 15) | rand ()); | |
95ed0025 RS |
339 | } |
340 | ||
95ed0025 | 341 | void |
480b0c5b | 342 | srandom (int seed) |
95ed0025 | 343 | { |
480b0c5b | 344 | srand (seed); |
95ed0025 RS |
345 | } |
346 | ||
76b3903d | 347 | |
cbe39279 RS |
348 | /* Normalize filename by converting all path separators to |
349 | the specified separator. Also conditionally convert upper | |
350 | case path name components to lower case. */ | |
351 | ||
352 | static void | |
353 | normalize_filename (fp, path_sep) | |
354 | register char *fp; | |
355 | char path_sep; | |
356 | { | |
357 | char sep; | |
358 | char *elem; | |
359 | ||
5162ffce MB |
360 | /* Always lower-case drive letters a-z, even if the filesystem |
361 | preserves case in filenames. | |
362 | This is so filenames can be compared by string comparison | |
363 | functions that are case-sensitive. Even case-preserving filesystems | |
364 | do not distinguish case in drive letters. */ | |
365 | if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z') | |
366 | { | |
367 | *fp += 'a' - 'A'; | |
368 | fp += 2; | |
369 | } | |
370 | ||
fbd6baed | 371 | if (NILP (Vw32_downcase_file_names)) |
cbe39279 RS |
372 | { |
373 | while (*fp) | |
374 | { | |
375 | if (*fp == '/' || *fp == '\\') | |
376 | *fp = path_sep; | |
377 | fp++; | |
378 | } | |
379 | return; | |
380 | } | |
381 | ||
382 | sep = path_sep; /* convert to this path separator */ | |
383 | elem = fp; /* start of current path element */ | |
384 | ||
385 | do { | |
386 | if (*fp >= 'a' && *fp <= 'z') | |
387 | elem = 0; /* don't convert this element */ | |
388 | ||
389 | if (*fp == 0 || *fp == ':') | |
390 | { | |
391 | sep = *fp; /* restore current separator (or 0) */ | |
392 | *fp = '/'; /* after conversion of this element */ | |
393 | } | |
394 | ||
395 | if (*fp == '/' || *fp == '\\') | |
396 | { | |
397 | if (elem && elem != fp) | |
398 | { | |
399 | *fp = 0; /* temporary end of string */ | |
400 | _strlwr (elem); /* while we convert to lower case */ | |
401 | } | |
402 | *fp = sep; /* convert (or restore) path separator */ | |
403 | elem = fp + 1; /* next element starts after separator */ | |
404 | sep = path_sep; | |
405 | } | |
406 | } while (*fp++); | |
407 | } | |
408 | ||
480b0c5b | 409 | /* Destructively turn backslashes into slashes. */ |
95ed0025 | 410 | void |
480b0c5b GV |
411 | dostounix_filename (p) |
412 | register char *p; | |
95ed0025 | 413 | { |
cbe39279 | 414 | normalize_filename (p, '/'); |
95ed0025 RS |
415 | } |
416 | ||
480b0c5b | 417 | /* Destructively turn slashes into backslashes. */ |
95ed0025 | 418 | void |
480b0c5b GV |
419 | unixtodos_filename (p) |
420 | register char *p; | |
95ed0025 | 421 | { |
cbe39279 | 422 | normalize_filename (p, '\\'); |
95ed0025 RS |
423 | } |
424 | ||
480b0c5b GV |
425 | /* Remove all CR's that are followed by a LF. |
426 | (From msdos.c...probably should figure out a way to share it, | |
427 | although this code isn't going to ever change.) */ | |
35f0d482 | 428 | int |
480b0c5b GV |
429 | crlf_to_lf (n, buf) |
430 | register int n; | |
431 | register unsigned char *buf; | |
35f0d482 | 432 | { |
480b0c5b GV |
433 | unsigned char *np = buf; |
434 | unsigned char *startp = buf; | |
435 | unsigned char *endp = buf + n; | |
35f0d482 | 436 | |
480b0c5b GV |
437 | if (n == 0) |
438 | return n; | |
439 | while (buf < endp - 1) | |
95ed0025 | 440 | { |
480b0c5b GV |
441 | if (*buf == 0x0d) |
442 | { | |
443 | if (*(++buf) != 0x0a) | |
444 | *np++ = 0x0d; | |
445 | } | |
446 | else | |
447 | *np++ = *buf++; | |
95ed0025 | 448 | } |
480b0c5b GV |
449 | if (buf < endp) |
450 | *np++ = *buf++; | |
451 | return np - startp; | |
95ed0025 RS |
452 | } |
453 | ||
76b3903d GV |
454 | /* Parse the root part of file name, if present. Return length and |
455 | optionally store pointer to char after root. */ | |
456 | static int | |
457 | parse_root (char * name, char ** pPath) | |
458 | { | |
459 | char * start = name; | |
460 | ||
461 | if (name == NULL) | |
462 | return 0; | |
463 | ||
464 | /* find the root name of the volume if given */ | |
465 | if (isalpha (name[0]) && name[1] == ':') | |
466 | { | |
467 | /* skip past drive specifier */ | |
468 | name += 2; | |
469 | if (IS_DIRECTORY_SEP (name[0])) | |
470 | name++; | |
471 | } | |
472 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
473 | { | |
474 | int slashes = 2; | |
475 | name += 2; | |
476 | do | |
477 | { | |
478 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
479 | break; | |
480 | name++; | |
481 | } | |
482 | while ( *name ); | |
483 | if (IS_DIRECTORY_SEP (name[0])) | |
484 | name++; | |
485 | } | |
486 | ||
487 | if (pPath) | |
488 | *pPath = name; | |
489 | ||
490 | return name - start; | |
491 | } | |
492 | ||
493 | /* Get long base name for name; name is assumed to be absolute. */ | |
494 | static int | |
495 | get_long_basename (char * name, char * buf, int size) | |
496 | { | |
497 | WIN32_FIND_DATA find_data; | |
498 | HANDLE dir_handle; | |
499 | int len = 0; | |
500 | ||
9ab8560d | 501 | /* must be valid filename, no wild cards or other invalid characters */ |
bb1584c8 RS |
502 | if (strpbrk (name, "*?|<>\"")) |
503 | return 0; | |
504 | ||
76b3903d GV |
505 | dir_handle = FindFirstFile (name, &find_data); |
506 | if (dir_handle != INVALID_HANDLE_VALUE) | |
507 | { | |
508 | if ((len = strlen (find_data.cFileName)) < size) | |
509 | memcpy (buf, find_data.cFileName, len + 1); | |
510 | else | |
511 | len = 0; | |
512 | FindClose (dir_handle); | |
513 | } | |
514 | return len; | |
515 | } | |
516 | ||
517 | /* Get long name for file, if possible (assumed to be absolute). */ | |
518 | BOOL | |
519 | w32_get_long_filename (char * name, char * buf, int size) | |
520 | { | |
521 | char * o = buf; | |
522 | char * p; | |
523 | char * q; | |
524 | char full[ MAX_PATH ]; | |
525 | int len; | |
526 | ||
527 | len = strlen (name); | |
528 | if (len >= MAX_PATH) | |
529 | return FALSE; | |
530 | ||
531 | /* Use local copy for destructive modification. */ | |
532 | memcpy (full, name, len+1); | |
533 | unixtodos_filename (full); | |
534 | ||
535 | /* Copy root part verbatim. */ | |
536 | len = parse_root (full, &p); | |
537 | memcpy (o, full, len); | |
538 | o += len; | |
4f8ac0b2 | 539 | *o = '\0'; |
76b3903d GV |
540 | size -= len; |
541 | ||
4f8ac0b2 | 542 | while (p != NULL && *p) |
76b3903d GV |
543 | { |
544 | q = p; | |
545 | p = strchr (q, '\\'); | |
546 | if (p) *p = '\0'; | |
547 | len = get_long_basename (full, o, size); | |
548 | if (len > 0) | |
549 | { | |
550 | o += len; | |
551 | size -= len; | |
552 | if (p != NULL) | |
553 | { | |
554 | *p++ = '\\'; | |
555 | if (size < 2) | |
556 | return FALSE; | |
557 | *o++ = '\\'; | |
558 | size--; | |
559 | *o = '\0'; | |
560 | } | |
561 | } | |
562 | else | |
563 | return FALSE; | |
564 | } | |
76b3903d GV |
565 | |
566 | return TRUE; | |
567 | } | |
568 | ||
9d3355d1 GV |
569 | int |
570 | is_unc_volume (const char *filename) | |
571 | { | |
572 | const char *ptr = filename; | |
573 | ||
574 | if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2]) | |
575 | return 0; | |
576 | ||
577 | if (strpbrk (ptr + 2, "*?|<>\"\\/")) | |
578 | return 0; | |
579 | ||
580 | return 1; | |
581 | } | |
76b3903d | 582 | |
95ed0025 RS |
583 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ |
584 | ||
95ed0025 RS |
585 | int |
586 | sigsetmask (int signal_mask) | |
587 | { | |
588 | return 0; | |
589 | } | |
590 | ||
8f900f6e AI |
591 | int |
592 | sigmask (int sig) | |
593 | { | |
594 | return 0; | |
595 | } | |
596 | ||
95ed0025 RS |
597 | int |
598 | sigblock (int sig) | |
599 | { | |
600 | return 0; | |
601 | } | |
602 | ||
8f900f6e AI |
603 | int |
604 | sigunblock (int sig) | |
605 | { | |
606 | return 0; | |
607 | } | |
608 | ||
95ed0025 RS |
609 | int |
610 | setpgrp (int pid, int gid) | |
611 | { | |
612 | return 0; | |
613 | } | |
614 | ||
615 | int | |
616 | alarm (int seconds) | |
617 | { | |
618 | return 0; | |
619 | } | |
620 | ||
c6624584 | 621 | void |
95ed0025 RS |
622 | unrequest_sigio (void) |
623 | { | |
c6624584 | 624 | return; |
95ed0025 RS |
625 | } |
626 | ||
c6624584 | 627 | void |
95ed0025 RS |
628 | request_sigio (void) |
629 | { | |
c6624584 | 630 | return; |
95ed0025 RS |
631 | } |
632 | ||
480b0c5b | 633 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
f332b293 GV |
634 | |
635 | LPBYTE | |
fbd6baed | 636 | w32_get_resource (key, lpdwtype) |
f332b293 GV |
637 | char *key; |
638 | LPDWORD lpdwtype; | |
639 | { | |
640 | LPBYTE lpvalue; | |
641 | HKEY hrootkey = NULL; | |
642 | DWORD cbData; | |
643 | BOOL ok = FALSE; | |
644 | ||
645 | /* Check both the current user and the local machine to see if | |
646 | we have any resources. */ | |
647 | ||
648 | if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
649 | { | |
650 | lpvalue = NULL; | |
651 | ||
652 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS | |
653 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
654 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
655 | { | |
656 | return (lpvalue); | |
657 | } | |
658 | ||
659 | if (lpvalue) xfree (lpvalue); | |
660 | ||
661 | RegCloseKey (hrootkey); | |
662 | } | |
663 | ||
664 | if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
665 | { | |
666 | lpvalue = NULL; | |
667 | ||
76b3903d GV |
668 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS |
669 | && (lpvalue = (LPBYTE) xmalloc (cbData)) != NULL | |
670 | && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS) | |
f332b293 GV |
671 | { |
672 | return (lpvalue); | |
673 | } | |
674 | ||
675 | if (lpvalue) xfree (lpvalue); | |
676 | ||
677 | RegCloseKey (hrootkey); | |
678 | } | |
679 | ||
680 | return (NULL); | |
681 | } | |
682 | ||
75b08edb GV |
683 | char *get_emacs_configuration (void); |
684 | extern Lisp_Object Vsystem_configuration; | |
685 | ||
f332b293 | 686 | void |
aa7b87b0 | 687 | init_environment (char ** argv) |
f332b293 | 688 | { |
b3308d2e KH |
689 | static const char * const tempdirs[] = { |
690 | "$TMPDIR", "$TEMP", "$TMP", "c:/" | |
691 | }; | |
692 | int i; | |
693 | const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]); | |
694 | ||
695 | /* Make sure they have a usable $TMPDIR. Many Emacs functions use | |
696 | temporary files and assume "/tmp" if $TMPDIR is unset, which | |
697 | will break on DOS/Windows. Refuse to work if we cannot find | |
698 | a directory, not even "c:/", usable for that purpose. */ | |
699 | for (i = 0; i < imax ; i++) | |
700 | { | |
701 | const char *tmp = tempdirs[i]; | |
702 | ||
703 | if (*tmp == '$') | |
704 | tmp = getenv (tmp + 1); | |
705 | /* Note that `access' can lie to us if the directory resides on a | |
706 | read-only filesystem, like CD-ROM or a write-protected floppy. | |
707 | The only way to be really sure is to actually create a file and | |
708 | see if it succeeds. But I think that's too much to ask. */ | |
a302c7ae | 709 | if (tmp && _access (tmp, D_OK) == 0) |
b3308d2e KH |
710 | { |
711 | char * var = alloca (strlen (tmp) + 8); | |
712 | sprintf (var, "TMPDIR=%s", tmp); | |
aca583b2 | 713 | _putenv (strdup (var)); |
b3308d2e KH |
714 | break; |
715 | } | |
716 | } | |
717 | if (i >= imax) | |
718 | cmd_error_internal | |
719 | (Fcons (Qerror, | |
720 | Fcons (build_string ("no usable temporary directories found!!"), | |
721 | Qnil)), | |
722 | "While setting TMPDIR: "); | |
723 | ||
ca149beb AI |
724 | /* Check for environment variables and use registry settings if they |
725 | don't exist. Fallback on default values where applicable. */ | |
f332b293 | 726 | { |
480b0c5b GV |
727 | int i; |
728 | LPBYTE lpval; | |
729 | DWORD dwType; | |
69fb0241 | 730 | char locale_name[32]; |
f332b293 | 731 | |
ca149beb AI |
732 | static struct env_entry |
733 | { | |
734 | char * name; | |
735 | char * def_value; | |
736 | } env_vars[] = | |
737 | { | |
738 | {"HOME", "C:/"}, | |
739 | {"PRELOAD_WINSOCK", NULL}, | |
740 | {"emacs_dir", "C:/emacs"}, | |
cc14250a | 741 | {"EMACSLOADPATH", "%emacs_dir%/site-lisp;%emacs_dir%/../site-lisp;%emacs_dir%/lisp;%emacs_dir%/leim"}, |
ca149beb AI |
742 | {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"}, |
743 | {"EMACSDATA", "%emacs_dir%/etc"}, | |
744 | {"EMACSPATH", "%emacs_dir%/bin"}, | |
76b3903d | 745 | /* We no longer set INFOPATH because Info-default-directory-list |
ca149beb AI |
746 | is then ignored. */ |
747 | /* {"INFOPATH", "%emacs_dir%/info"}, */ | |
748 | {"EMACSDOC", "%emacs_dir%/etc"}, | |
69fb0241 JR |
749 | {"TERM", "cmd"}, |
750 | {"LANG", NULL}, | |
480b0c5b GV |
751 | }; |
752 | ||
69fb0241 JR |
753 | /* Get default locale info and use it for LANG. */ |
754 | if (GetLocaleInfo (LOCALE_USER_DEFAULT, | |
755 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, | |
756 | locale_name, sizeof (locale_name))) | |
757 | { | |
758 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) | |
759 | { | |
760 | if (strcmp (env_vars[i].name, "LANG") == 0) | |
761 | { | |
762 | env_vars[i].def_value = locale_name; | |
763 | break; | |
764 | } | |
765 | } | |
766 | } | |
767 | ||
ca149beb AI |
768 | #define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */ |
769 | ||
770 | /* Treat emacs_dir specially: set it unconditionally based on our | |
771 | location, if it appears that we are running from the bin subdir | |
772 | of a standard installation. */ | |
773 | { | |
774 | char *p; | |
775 | char modname[MAX_PATH]; | |
776 | ||
777 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) | |
778 | abort (); | |
779 | if ((p = strrchr (modname, '\\')) == NULL) | |
780 | abort (); | |
781 | *p = 0; | |
782 | ||
783 | if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0) | |
784 | { | |
785 | char buf[SET_ENV_BUF_SIZE]; | |
786 | ||
787 | *p = 0; | |
788 | for (p = modname; *p; p++) | |
789 | if (*p == '\\') *p = '/'; | |
790 | ||
791 | _snprintf (buf, sizeof(buf)-1, "emacs_dir=%s", modname); | |
a302c7ae | 792 | _putenv (strdup (buf)); |
ca149beb AI |
793 | } |
794 | } | |
795 | ||
69fb0241 | 796 | for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++) |
f332b293 | 797 | { |
ca149beb | 798 | if (!getenv (env_vars[i].name)) |
480b0c5b | 799 | { |
ca149beb | 800 | int dont_free = 0; |
480b0c5b | 801 | |
ca149beb AI |
802 | if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL) |
803 | { | |
804 | lpval = env_vars[i].def_value; | |
805 | dwType = REG_EXPAND_SZ; | |
806 | dont_free = 1; | |
480b0c5b | 807 | } |
ca149beb AI |
808 | |
809 | if (lpval) | |
480b0c5b | 810 | { |
ca149beb AI |
811 | if (dwType == REG_EXPAND_SZ) |
812 | { | |
813 | char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE]; | |
814 | ||
815 | ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof(buf1)); | |
816 | _snprintf (buf2, sizeof(buf2)-1, "%s=%s", env_vars[i].name, buf1); | |
a302c7ae | 817 | _putenv (strdup (buf2)); |
ca149beb AI |
818 | } |
819 | else if (dwType == REG_SZ) | |
820 | { | |
821 | char buf[SET_ENV_BUF_SIZE]; | |
f332b293 | 822 | |
ca149beb | 823 | _snprintf (buf, sizeof(buf)-1, "%s=%s", env_vars[i].name, lpval); |
a302c7ae | 824 | _putenv (strdup (buf)); |
ca149beb | 825 | } |
f332b293 | 826 | |
ca149beb AI |
827 | if (!dont_free) |
828 | xfree (lpval); | |
829 | } | |
480b0c5b GV |
830 | } |
831 | } | |
832 | } | |
833 | ||
75b08edb GV |
834 | /* Rebuild system configuration to reflect invoking system. */ |
835 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); | |
836 | ||
76b3903d GV |
837 | /* Another special case: on NT, the PATH variable is actually named |
838 | "Path" although cmd.exe (perhaps NT itself) arranges for | |
839 | environment variable lookup and setting to be case insensitive. | |
840 | However, Emacs assumes a fully case sensitive environment, so we | |
841 | need to change "Path" to "PATH" to match the expectations of | |
842 | various elisp packages. We do this by the sneaky method of | |
843 | modifying the string in the C runtime environ entry. | |
844 | ||
845 | The same applies to COMSPEC. */ | |
846 | { | |
847 | char ** envp; | |
848 | ||
849 | for (envp = environ; *envp; envp++) | |
850 | if (_strnicmp (*envp, "PATH=", 5) == 0) | |
851 | memcpy (*envp, "PATH=", 5); | |
852 | else if (_strnicmp (*envp, "COMSPEC=", 8) == 0) | |
853 | memcpy (*envp, "COMSPEC=", 8); | |
854 | } | |
855 | ||
856 | /* Remember the initial working directory for getwd, then make the | |
857 | real wd be the location of emacs.exe to avoid conflicts when | |
858 | renaming or deleting directories. (We also don't call chdir when | |
859 | running subprocesses for the same reason.) */ | |
860 | if (!GetCurrentDirectory (MAXPATHLEN, startup_dir)) | |
861 | abort (); | |
862 | ||
863 | { | |
864 | char *p; | |
aa7b87b0 | 865 | static char modname[MAX_PATH]; |
76b3903d GV |
866 | |
867 | if (!GetModuleFileName (NULL, modname, MAX_PATH)) | |
868 | abort (); | |
869 | if ((p = strrchr (modname, '\\')) == NULL) | |
870 | abort (); | |
871 | *p = 0; | |
872 | ||
873 | SetCurrentDirectory (modname); | |
aa7b87b0 AI |
874 | |
875 | /* Ensure argv[0] has the full path to Emacs. */ | |
876 | *p = '\\'; | |
877 | argv[0] = modname; | |
76b3903d GV |
878 | } |
879 | ||
20af4831 JR |
880 | /* Determine if there is a middle mouse button, to allow parse_button |
881 | to decide whether right mouse events should be mouse-2 or | |
882 | mouse-3. */ | |
883 | XSETINT (Vw32_num_mouse_buttons, GetSystemMetrics (SM_CMOUSEBUTTONS)); | |
884 | ||
480b0c5b GV |
885 | init_user_info (); |
886 | } | |
887 | ||
bf794306 EZ |
888 | char * |
889 | emacs_root_dir (void) | |
890 | { | |
891 | static char root_dir[FILENAME_MAX]; | |
892 | const char *p; | |
893 | ||
894 | p = getenv ("emacs_dir"); | |
895 | if (p == NULL) | |
896 | abort (); | |
897 | strcpy (root_dir, p); | |
898 | root_dir[parse_root (root_dir, NULL)] = '\0'; | |
899 | dostounix_filename (root_dir); | |
900 | return root_dir; | |
901 | } | |
902 | ||
480b0c5b GV |
903 | /* We don't have scripts to automatically determine the system configuration |
904 | for Emacs before it's compiled, and we don't want to have to make the | |
905 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime | |
906 | routine. */ | |
907 | ||
480b0c5b GV |
908 | char * |
909 | get_emacs_configuration (void) | |
910 | { | |
911 | char *arch, *oem, *os; | |
c5247da2 | 912 | int build_num; |
a302c7ae | 913 | static char configuration_buffer[32]; |
480b0c5b GV |
914 | |
915 | /* Determine the processor type. */ | |
916 | switch (get_processor_type ()) | |
917 | { | |
918 | ||
919 | #ifdef PROCESSOR_INTEL_386 | |
920 | case PROCESSOR_INTEL_386: | |
921 | case PROCESSOR_INTEL_486: | |
922 | case PROCESSOR_INTEL_PENTIUM: | |
923 | arch = "i386"; | |
924 | break; | |
925 | #endif | |
926 | ||
927 | #ifdef PROCESSOR_INTEL_860 | |
928 | case PROCESSOR_INTEL_860: | |
929 | arch = "i860"; | |
930 | break; | |
931 | #endif | |
932 | ||
933 | #ifdef PROCESSOR_MIPS_R2000 | |
934 | case PROCESSOR_MIPS_R2000: | |
935 | case PROCESSOR_MIPS_R3000: | |
936 | case PROCESSOR_MIPS_R4000: | |
937 | arch = "mips"; | |
938 | break; | |
939 | #endif | |
940 | ||
941 | #ifdef PROCESSOR_ALPHA_21064 | |
942 | case PROCESSOR_ALPHA_21064: | |
943 | arch = "alpha"; | |
944 | break; | |
945 | #endif | |
946 | ||
947 | default: | |
948 | arch = "unknown"; | |
949 | break; | |
f332b293 | 950 | } |
480b0c5b | 951 | |
a302c7ae AI |
952 | /* Use the OEM field to reflect the compiler/library combination. */ |
953 | #ifdef _MSC_VER | |
954 | #define COMPILER_NAME "msvc" | |
955 | #else | |
956 | #ifdef __GNUC__ | |
957 | #define COMPILER_NAME "mingw" | |
958 | #else | |
959 | #define COMPILER_NAME "unknown" | |
960 | #endif | |
961 | #endif | |
962 | oem = COMPILER_NAME; | |
480b0c5b | 963 | |
c5247da2 GV |
964 | switch (osinfo_cache.dwPlatformId) { |
965 | case VER_PLATFORM_WIN32_NT: | |
966 | os = "nt"; | |
967 | build_num = osinfo_cache.dwBuildNumber; | |
968 | break; | |
969 | case VER_PLATFORM_WIN32_WINDOWS: | |
970 | if (osinfo_cache.dwMinorVersion == 0) { | |
971 | os = "windows95"; | |
972 | } else { | |
973 | os = "windows98"; | |
974 | } | |
975 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
976 | break; | |
977 | case VER_PLATFORM_WIN32s: | |
978 | /* Not supported, should not happen. */ | |
979 | os = "windows32s"; | |
980 | build_num = LOWORD (osinfo_cache.dwBuildNumber); | |
981 | break; | |
982 | default: | |
983 | os = "unknown"; | |
984 | build_num = 0; | |
985 | break; | |
986 | } | |
987 | ||
988 | if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) { | |
989 | sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os, | |
990 | get_w32_major_version (), get_w32_minor_version (), build_num); | |
991 | } else { | |
992 | sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num); | |
993 | } | |
480b0c5b | 994 | |
480b0c5b | 995 | return configuration_buffer; |
f332b293 GV |
996 | } |
997 | ||
a302c7ae AI |
998 | char * |
999 | get_emacs_configuration_options (void) | |
1000 | { | |
1001 | static char options_buffer[256]; | |
1002 | ||
1003 | /* Work out the effective configure options for this build. */ | |
1004 | #ifdef _MSC_VER | |
1005 | #define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100 | |
1006 | #else | |
1007 | #ifdef __GNUC__ | |
1008 | #define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__ | |
1009 | #else | |
1010 | #define COMPILER_VERSION "" | |
1011 | #endif | |
1012 | #endif | |
1013 | ||
1014 | sprintf (options_buffer, COMPILER_VERSION); | |
1015 | #ifdef EMACSDEBUG | |
1016 | strcat (options_buffer, " --no-opt"); | |
1017 | #endif | |
1018 | #ifdef USER_CFLAGS | |
1019 | strcat (options_buffer, " --cflags"); | |
1020 | strcat (options_buffer, USER_CFLAGS); | |
1021 | #endif | |
1022 | #ifdef USER_LDFLAGS | |
1023 | strcat (options_buffer, " --ldflags"); | |
1024 | strcat (options_buffer, USER_LDFLAGS); | |
1025 | #endif | |
1026 | return options_buffer; | |
1027 | } | |
1028 | ||
1029 | ||
35f0d482 KH |
1030 | #include <sys/timeb.h> |
1031 | ||
1032 | /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */ | |
1033 | void | |
1034 | gettimeofday (struct timeval *tv, struct timezone *tz) | |
1035 | { | |
a302c7ae | 1036 | struct timeb tb; |
35f0d482 KH |
1037 | _ftime (&tb); |
1038 | ||
1039 | tv->tv_sec = tb.time; | |
1040 | tv->tv_usec = tb.millitm * 1000L; | |
1041 | if (tz) | |
1042 | { | |
1043 | tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */ | |
1044 | tz->tz_dsttime = tb.dstflag; /* type of dst correction */ | |
1045 | } | |
1046 | } | |
35f0d482 | 1047 | |
480b0c5b | 1048 | /* ------------------------------------------------------------------------- */ |
fbd6baed | 1049 | /* IO support and wrapper functions for W32 API. */ |
480b0c5b | 1050 | /* ------------------------------------------------------------------------- */ |
95ed0025 | 1051 | |
480b0c5b GV |
1052 | /* Place a wrapper around the MSVC version of ctime. It returns NULL |
1053 | on network directories, so we handle that case here. | |
1054 | (Ulrich Leodolter, 1/11/95). */ | |
1055 | char * | |
1056 | sys_ctime (const time_t *t) | |
1057 | { | |
1058 | char *str = (char *) ctime (t); | |
1059 | return (str ? str : "Sun Jan 01 00:00:00 1970"); | |
1060 | } | |
1061 | ||
1062 | /* Emulate sleep...we could have done this with a define, but that | |
1063 | would necessitate including windows.h in the files that used it. | |
1064 | This is much easier. */ | |
1065 | void | |
1066 | sys_sleep (int seconds) | |
1067 | { | |
1068 | Sleep (seconds * 1000); | |
1069 | } | |
1070 | ||
76b3903d | 1071 | /* Internal MSVC functions for low-level descriptor munging */ |
480b0c5b GV |
1072 | extern int __cdecl _set_osfhnd (int fd, long h); |
1073 | extern int __cdecl _free_osfhnd (int fd); | |
1074 | ||
1075 | /* parallel array of private info on file handles */ | |
1076 | filedesc fd_info [ MAXDESC ]; | |
1077 | ||
76b3903d GV |
1078 | typedef struct volume_info_data { |
1079 | struct volume_info_data * next; | |
1080 | ||
1081 | /* time when info was obtained */ | |
1082 | DWORD timestamp; | |
1083 | ||
1084 | /* actual volume info */ | |
1085 | char * root_dir; | |
480b0c5b GV |
1086 | DWORD serialnum; |
1087 | DWORD maxcomp; | |
1088 | DWORD flags; | |
76b3903d GV |
1089 | char * name; |
1090 | char * type; | |
1091 | } volume_info_data; | |
1092 | ||
1093 | /* Global referenced by various functions. */ | |
1094 | static volume_info_data volume_info; | |
1095 | ||
1096 | /* Vector to indicate which drives are local and fixed (for which cached | |
1097 | data never expires). */ | |
1098 | static BOOL fixed_drives[26]; | |
1099 | ||
1100 | /* Consider cached volume information to be stale if older than 10s, | |
1101 | at least for non-local drives. Info for fixed drives is never stale. */ | |
1102 | #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' ) | |
1103 | #define VOLINFO_STILL_VALID( root_dir, info ) \ | |
1104 | ( ( isalpha (root_dir[0]) && \ | |
1105 | fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \ | |
1106 | || GetTickCount () - info->timestamp < 10000 ) | |
1107 | ||
1108 | /* Cache support functions. */ | |
1109 | ||
1110 | /* Simple linked list with linear search is sufficient. */ | |
1111 | static volume_info_data *volume_cache = NULL; | |
1112 | ||
1113 | static volume_info_data * | |
1114 | lookup_volume_info (char * root_dir) | |
1115 | { | |
1116 | volume_info_data * info; | |
1117 | ||
1118 | for (info = volume_cache; info; info = info->next) | |
1119 | if (stricmp (info->root_dir, root_dir) == 0) | |
1120 | break; | |
1121 | return info; | |
1122 | } | |
1123 | ||
1124 | static void | |
1125 | add_volume_info (char * root_dir, volume_info_data * info) | |
1126 | { | |
a302c7ae | 1127 | info->root_dir = xstrdup (root_dir); |
76b3903d GV |
1128 | info->next = volume_cache; |
1129 | volume_cache = info; | |
1130 | } | |
1131 | ||
1132 | ||
1133 | /* Wrapper for GetVolumeInformation, which uses caching to avoid | |
1134 | performance penalty (~2ms on 486 for local drives, 7.5ms for local | |
1135 | cdrom drive, ~5-10ms or more for remote drives on LAN). */ | |
1136 | volume_info_data * | |
1137 | GetCachedVolumeInformation (char * root_dir) | |
1138 | { | |
1139 | volume_info_data * info; | |
1140 | char default_root[ MAX_PATH ]; | |
1141 | ||
1142 | /* NULL for root_dir means use root from current directory. */ | |
1143 | if (root_dir == NULL) | |
1144 | { | |
1145 | if (GetCurrentDirectory (MAX_PATH, default_root) == 0) | |
1146 | return NULL; | |
1147 | parse_root (default_root, &root_dir); | |
1148 | *root_dir = 0; | |
1149 | root_dir = default_root; | |
1150 | } | |
1151 | ||
1152 | /* Local fixed drives can be cached permanently. Removable drives | |
1153 | cannot be cached permanently, since the volume name and serial | |
1154 | number (if nothing else) can change. Remote drives should be | |
1155 | treated as if they are removable, since there is no sure way to | |
1156 | tell whether they are or not. Also, the UNC association of drive | |
1157 | letters mapped to remote volumes can be changed at any time (even | |
1158 | by other processes) without notice. | |
1159 | ||
1160 | As a compromise, so we can benefit from caching info for remote | |
1161 | volumes, we use a simple expiry mechanism to invalidate cache | |
1162 | entries that are more than ten seconds old. */ | |
1163 | ||
1164 | #if 0 | |
1165 | /* No point doing this, because WNetGetConnection is even slower than | |
1166 | GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW, | |
1167 | GetDriveType is about the only call of this type which does not | |
1168 | involve network access, and so is extremely quick). */ | |
1169 | ||
1170 | /* Map drive letter to UNC if remote. */ | |
1171 | if ( isalpha( root_dir[0] ) && !fixed[ DRIVE_INDEX( root_dir[0] ) ] ) | |
1172 | { | |
1173 | char remote_name[ 256 ]; | |
1174 | char drive[3] = { root_dir[0], ':' }; | |
1175 | ||
1176 | if (WNetGetConnection (drive, remote_name, sizeof (remote_name)) | |
1177 | == NO_ERROR) | |
1178 | /* do something */ ; | |
1179 | } | |
1180 | #endif | |
1181 | ||
1182 | info = lookup_volume_info (root_dir); | |
1183 | ||
1184 | if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info)) | |
1185 | { | |
1186 | char name[ 256 ]; | |
1187 | DWORD serialnum; | |
1188 | DWORD maxcomp; | |
1189 | DWORD flags; | |
1190 | char type[ 256 ]; | |
1191 | ||
1192 | /* Info is not cached, or is stale. */ | |
1193 | if (!GetVolumeInformation (root_dir, | |
1194 | name, sizeof (name), | |
1195 | &serialnum, | |
1196 | &maxcomp, | |
1197 | &flags, | |
1198 | type, sizeof (type))) | |
1199 | return NULL; | |
1200 | ||
1201 | /* Cache the volume information for future use, overwriting existing | |
1202 | entry if present. */ | |
1203 | if (info == NULL) | |
1204 | { | |
1205 | info = (volume_info_data *) xmalloc (sizeof (volume_info_data)); | |
1206 | add_volume_info (root_dir, info); | |
1207 | } | |
1208 | else | |
1209 | { | |
a302c7ae AI |
1210 | xfree (info->name); |
1211 | xfree (info->type); | |
76b3903d GV |
1212 | } |
1213 | ||
a302c7ae | 1214 | info->name = xstrdup (name); |
76b3903d GV |
1215 | info->serialnum = serialnum; |
1216 | info->maxcomp = maxcomp; | |
1217 | info->flags = flags; | |
a302c7ae | 1218 | info->type = xstrdup (type); |
76b3903d GV |
1219 | info->timestamp = GetTickCount (); |
1220 | } | |
1221 | ||
1222 | return info; | |
1223 | } | |
480b0c5b GV |
1224 | |
1225 | /* Get information on the volume where name is held; set path pointer to | |
1226 | start of pathname in name (past UNC header\volume header if present). */ | |
1227 | int | |
1228 | get_volume_info (const char * name, const char ** pPath) | |
95ed0025 | 1229 | { |
480b0c5b GV |
1230 | char temp[MAX_PATH]; |
1231 | char *rootname = NULL; /* default to current volume */ | |
76b3903d | 1232 | volume_info_data * info; |
480b0c5b GV |
1233 | |
1234 | if (name == NULL) | |
1235 | return FALSE; | |
1236 | ||
1237 | /* find the root name of the volume if given */ | |
1238 | if (isalpha (name[0]) && name[1] == ':') | |
1239 | { | |
1240 | rootname = temp; | |
1241 | temp[0] = *name++; | |
1242 | temp[1] = *name++; | |
1243 | temp[2] = '\\'; | |
1244 | temp[3] = 0; | |
1245 | } | |
1246 | else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1])) | |
95ed0025 | 1247 | { |
480b0c5b GV |
1248 | char *str = temp; |
1249 | int slashes = 4; | |
1250 | rootname = temp; | |
1251 | do | |
1252 | { | |
1253 | if (IS_DIRECTORY_SEP (*name) && --slashes == 0) | |
1254 | break; | |
1255 | *str++ = *name++; | |
1256 | } | |
1257 | while ( *name ); | |
1258 | ||
480b0c5b GV |
1259 | *str++ = '\\'; |
1260 | *str = 0; | |
95ed0025 | 1261 | } |
480b0c5b GV |
1262 | |
1263 | if (pPath) | |
1264 | *pPath = name; | |
1265 | ||
76b3903d GV |
1266 | info = GetCachedVolumeInformation (rootname); |
1267 | if (info != NULL) | |
95ed0025 | 1268 | { |
76b3903d GV |
1269 | /* Set global referenced by other functions. */ |
1270 | volume_info = *info; | |
480b0c5b | 1271 | return TRUE; |
95ed0025 | 1272 | } |
480b0c5b GV |
1273 | return FALSE; |
1274 | } | |
1275 | ||
1276 | /* Determine if volume is FAT format (ie. only supports short 8.3 | |
1277 | names); also set path pointer to start of pathname in name. */ | |
1278 | int | |
1279 | is_fat_volume (const char * name, const char ** pPath) | |
1280 | { | |
1281 | if (get_volume_info (name, pPath)) | |
1282 | return (volume_info.maxcomp == 12); | |
1283 | return FALSE; | |
1284 | } | |
1285 | ||
1286 | /* Map filename to a legal 8.3 name if necessary. */ | |
1287 | const char * | |
fbd6baed | 1288 | map_w32_filename (const char * name, const char ** pPath) |
480b0c5b GV |
1289 | { |
1290 | static char shortname[MAX_PATH]; | |
1291 | char * str = shortname; | |
1292 | char c; | |
480b0c5b | 1293 | char * path; |
76b3903d | 1294 | const char * save_name = name; |
480b0c5b | 1295 | |
ca149beb AI |
1296 | if (strlen (name) >= MAX_PATH) |
1297 | { | |
1298 | /* Return a filename which will cause callers to fail. */ | |
1299 | strcpy (shortname, "?"); | |
1300 | return shortname; | |
1301 | } | |
1302 | ||
a302c7ae | 1303 | if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */ |
95ed0025 | 1304 | { |
480b0c5b GV |
1305 | register int left = 8; /* maximum number of chars in part */ |
1306 | register int extn = 0; /* extension added? */ | |
1307 | register int dots = 2; /* maximum number of dots allowed */ | |
1308 | ||
1309 | while (name < path) | |
1310 | *str++ = *name++; /* skip past UNC header */ | |
1311 | ||
1312 | while ((c = *name++)) | |
1313 | { | |
1314 | switch ( c ) | |
1315 | { | |
1316 | case '\\': | |
1317 | case '/': | |
1318 | *str++ = '\\'; | |
1319 | extn = 0; /* reset extension flags */ | |
1320 | dots = 2; /* max 2 dots */ | |
1321 | left = 8; /* max length 8 for main part */ | |
1322 | break; | |
1323 | case ':': | |
1324 | *str++ = ':'; | |
1325 | extn = 0; /* reset extension flags */ | |
1326 | dots = 2; /* max 2 dots */ | |
1327 | left = 8; /* max length 8 for main part */ | |
1328 | break; | |
1329 | case '.': | |
1330 | if ( dots ) | |
1331 | { | |
1332 | /* Convert path components of the form .xxx to _xxx, | |
1333 | but leave . and .. as they are. This allows .emacs | |
1334 | to be read as _emacs, for example. */ | |
1335 | ||
1336 | if (! *name || | |
1337 | *name == '.' || | |
1338 | IS_DIRECTORY_SEP (*name)) | |
1339 | { | |
1340 | *str++ = '.'; | |
1341 | dots--; | |
1342 | } | |
1343 | else | |
1344 | { | |
1345 | *str++ = '_'; | |
1346 | left--; | |
1347 | dots = 0; | |
1348 | } | |
1349 | } | |
1350 | else if ( !extn ) | |
1351 | { | |
1352 | *str++ = '.'; | |
1353 | extn = 1; /* we've got an extension */ | |
1354 | left = 3; /* 3 chars in extension */ | |
1355 | } | |
1356 | else | |
1357 | { | |
1358 | /* any embedded dots after the first are converted to _ */ | |
1359 | *str++ = '_'; | |
1360 | } | |
1361 | break; | |
1362 | case '~': | |
1363 | case '#': /* don't lose these, they're important */ | |
1364 | if ( ! left ) | |
1365 | str[-1] = c; /* replace last character of part */ | |
1366 | /* FALLTHRU */ | |
1367 | default: | |
1368 | if ( left ) | |
1369 | { | |
1370 | *str++ = tolower (c); /* map to lower case (looks nicer) */ | |
1371 | left--; | |
1372 | dots = 0; /* started a path component */ | |
1373 | } | |
1374 | break; | |
1375 | } | |
1376 | } | |
1377 | *str = '\0'; | |
fc85cb29 RS |
1378 | } |
1379 | else | |
1380 | { | |
1381 | strcpy (shortname, name); | |
1382 | unixtodos_filename (shortname); | |
95ed0025 | 1383 | } |
480b0c5b GV |
1384 | |
1385 | if (pPath) | |
76b3903d | 1386 | *pPath = shortname + (path - save_name); |
480b0c5b | 1387 | |
fc85cb29 | 1388 | return shortname; |
480b0c5b GV |
1389 | } |
1390 | ||
b3308d2e KH |
1391 | static int |
1392 | is_exec (const char * name) | |
1393 | { | |
1394 | char * p = strrchr (name, '.'); | |
1395 | return | |
1396 | (p != NULL | |
1397 | && (stricmp (p, ".exe") == 0 || | |
1398 | stricmp (p, ".com") == 0 || | |
1399 | stricmp (p, ".bat") == 0 || | |
1400 | stricmp (p, ".cmd") == 0)); | |
1401 | } | |
1402 | ||
76b3903d GV |
1403 | /* Emulate the Unix directory procedures opendir, closedir, |
1404 | and readdir. We can't use the procedures supplied in sysdep.c, | |
1405 | so we provide them here. */ | |
1406 | ||
1407 | struct direct dir_static; /* simulated directory contents */ | |
1408 | static HANDLE dir_find_handle = INVALID_HANDLE_VALUE; | |
1409 | static int dir_is_fat; | |
1410 | static char dir_pathname[MAXPATHLEN+1]; | |
1411 | static WIN32_FIND_DATA dir_find_data; | |
1412 | ||
9d3355d1 GV |
1413 | /* Support shares on a network resource as subdirectories of a read-only |
1414 | root directory. */ | |
1415 | static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1416 | HANDLE open_unc_volume (char *); | |
1417 | char *read_unc_volume (HANDLE, char *, int); | |
1418 | void close_unc_volume (HANDLE); | |
1419 | ||
76b3903d GV |
1420 | DIR * |
1421 | opendir (char *filename) | |
1422 | { | |
1423 | DIR *dirp; | |
1424 | ||
1425 | /* Opening is done by FindFirstFile. However, a read is inherent to | |
1426 | this operation, so we defer the open until read time. */ | |
1427 | ||
76b3903d GV |
1428 | if (dir_find_handle != INVALID_HANDLE_VALUE) |
1429 | return NULL; | |
9d3355d1 GV |
1430 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1431 | return NULL; | |
1432 | ||
1433 | if (is_unc_volume (filename)) | |
1434 | { | |
1435 | wnet_enum_handle = open_unc_volume (filename); | |
1436 | if (wnet_enum_handle == INVALID_HANDLE_VALUE) | |
1437 | return NULL; | |
1438 | } | |
1439 | ||
1440 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) | |
1441 | return NULL; | |
76b3903d GV |
1442 | |
1443 | dirp->dd_fd = 0; | |
1444 | dirp->dd_loc = 0; | |
1445 | dirp->dd_size = 0; | |
1446 | ||
1447 | strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN); | |
1448 | dir_pathname[MAXPATHLEN] = '\0'; | |
1449 | dir_is_fat = is_fat_volume (filename, NULL); | |
1450 | ||
1451 | return dirp; | |
1452 | } | |
1453 | ||
1454 | void | |
1455 | closedir (DIR *dirp) | |
1456 | { | |
1457 | /* If we have a find-handle open, close it. */ | |
1458 | if (dir_find_handle != INVALID_HANDLE_VALUE) | |
1459 | { | |
1460 | FindClose (dir_find_handle); | |
1461 | dir_find_handle = INVALID_HANDLE_VALUE; | |
1462 | } | |
9d3355d1 GV |
1463 | else if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1464 | { | |
1465 | close_unc_volume (wnet_enum_handle); | |
1466 | wnet_enum_handle = INVALID_HANDLE_VALUE; | |
1467 | } | |
76b3903d GV |
1468 | xfree ((char *) dirp); |
1469 | } | |
1470 | ||
1471 | struct direct * | |
1472 | readdir (DIR *dirp) | |
1473 | { | |
9d3355d1 GV |
1474 | if (wnet_enum_handle != INVALID_HANDLE_VALUE) |
1475 | { | |
1476 | if (!read_unc_volume (wnet_enum_handle, | |
1477 | dir_find_data.cFileName, | |
1478 | MAX_PATH)) | |
1479 | return NULL; | |
1480 | } | |
76b3903d | 1481 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ |
9d3355d1 | 1482 | else if (dir_find_handle == INVALID_HANDLE_VALUE) |
76b3903d GV |
1483 | { |
1484 | char filename[MAXNAMLEN + 3]; | |
1485 | int ln; | |
1486 | ||
1487 | strcpy (filename, dir_pathname); | |
1488 | ln = strlen (filename) - 1; | |
1489 | if (!IS_DIRECTORY_SEP (filename[ln])) | |
1490 | strcat (filename, "\\"); | |
1491 | strcat (filename, "*"); | |
1492 | ||
1493 | dir_find_handle = FindFirstFile (filename, &dir_find_data); | |
1494 | ||
1495 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
1496 | return NULL; | |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | if (!FindNextFile (dir_find_handle, &dir_find_data)) | |
1501 | return NULL; | |
1502 | } | |
1503 | ||
1504 | /* Emacs never uses this value, so don't bother making it match | |
1505 | value returned by stat(). */ | |
1506 | dir_static.d_ino = 1; | |
1507 | ||
1508 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + | |
1509 | dir_static.d_namlen - dir_static.d_namlen % 4; | |
1510 | ||
1511 | dir_static.d_namlen = strlen (dir_find_data.cFileName); | |
1512 | strcpy (dir_static.d_name, dir_find_data.cFileName); | |
1513 | if (dir_is_fat) | |
1514 | _strlwr (dir_static.d_name); | |
1515 | else if (!NILP (Vw32_downcase_file_names)) | |
1516 | { | |
1517 | register char *p; | |
1518 | for (p = dir_static.d_name; *p; p++) | |
1519 | if (*p >= 'a' && *p <= 'z') | |
1520 | break; | |
1521 | if (!*p) | |
1522 | _strlwr (dir_static.d_name); | |
1523 | } | |
1524 | ||
1525 | return &dir_static; | |
1526 | } | |
1527 | ||
9d3355d1 GV |
1528 | HANDLE |
1529 | open_unc_volume (char *path) | |
1530 | { | |
1531 | NETRESOURCE nr; | |
1532 | HANDLE henum; | |
1533 | int result; | |
1534 | ||
1535 | nr.dwScope = RESOURCE_GLOBALNET; | |
1536 | nr.dwType = RESOURCETYPE_DISK; | |
1537 | nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER; | |
1538 | nr.dwUsage = RESOURCEUSAGE_CONTAINER; | |
1539 | nr.lpLocalName = NULL; | |
1540 | nr.lpRemoteName = map_w32_filename (path, NULL); | |
1541 | nr.lpComment = NULL; | |
1542 | nr.lpProvider = NULL; | |
1543 | ||
1544 | result = WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_DISK, | |
1545 | RESOURCEUSAGE_CONNECTABLE, &nr, &henum); | |
1546 | ||
1547 | if (result == NO_ERROR) | |
1548 | return henum; | |
1549 | else | |
1550 | return INVALID_HANDLE_VALUE; | |
1551 | } | |
1552 | ||
1553 | char * | |
1554 | read_unc_volume (HANDLE henum, char *readbuf, int size) | |
1555 | { | |
a302c7ae | 1556 | DWORD count; |
9d3355d1 | 1557 | int result; |
a302c7ae | 1558 | DWORD bufsize = 512; |
9d3355d1 GV |
1559 | char *buffer; |
1560 | char *ptr; | |
1561 | ||
1562 | count = 1; | |
1563 | buffer = alloca (bufsize); | |
1564 | result = WNetEnumResource (wnet_enum_handle, &count, buffer, &bufsize); | |
1565 | if (result != NO_ERROR) | |
1566 | return NULL; | |
1567 | ||
1568 | /* WNetEnumResource returns \\resource\share...skip forward to "share". */ | |
1569 | ptr = ((LPNETRESOURCE) buffer)->lpRemoteName; | |
1570 | ptr += 2; | |
1571 | while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++; | |
1572 | ptr++; | |
1573 | ||
1574 | strncpy (readbuf, ptr, size); | |
1575 | return readbuf; | |
1576 | } | |
1577 | ||
1578 | void | |
1579 | close_unc_volume (HANDLE henum) | |
1580 | { | |
1581 | if (henum != INVALID_HANDLE_VALUE) | |
1582 | WNetCloseEnum (henum); | |
1583 | } | |
1584 | ||
1585 | DWORD | |
1586 | unc_volume_file_attributes (char *path) | |
1587 | { | |
1588 | HANDLE henum; | |
1589 | DWORD attrs; | |
1590 | ||
1591 | henum = open_unc_volume (path); | |
1592 | if (henum == INVALID_HANDLE_VALUE) | |
1593 | return -1; | |
1594 | ||
1595 | attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY; | |
1596 | ||
1597 | close_unc_volume (henum); | |
1598 | ||
1599 | return attrs; | |
1600 | } | |
1601 | ||
480b0c5b GV |
1602 | |
1603 | /* Shadow some MSVC runtime functions to map requests for long filenames | |
1604 | to reasonable short names if necessary. This was originally added to | |
1605 | permit running Emacs on NT 3.1 on a FAT partition, which doesn't support | |
1606 | long file names. */ | |
1607 | ||
1608 | int | |
1609 | sys_access (const char * path, int mode) | |
1610 | { | |
b3308d2e KH |
1611 | DWORD attributes; |
1612 | ||
1613 | /* MSVC implementation doesn't recognize D_OK. */ | |
1614 | path = map_w32_filename (path, NULL); | |
9d3355d1 GV |
1615 | if (is_unc_volume (path)) |
1616 | { | |
1617 | attributes = unc_volume_file_attributes (path); | |
1618 | if (attributes == -1) { | |
1619 | errno = EACCES; | |
1620 | return -1; | |
1621 | } | |
1622 | } | |
1623 | else if ((attributes = GetFileAttributes (path)) == -1) | |
b3308d2e KH |
1624 | { |
1625 | /* Should try mapping GetLastError to errno; for now just indicate | |
1626 | that path doesn't exist. */ | |
1627 | errno = EACCES; | |
1628 | return -1; | |
1629 | } | |
1630 | if ((mode & X_OK) != 0 && !is_exec (path)) | |
1631 | { | |
1632 | errno = EACCES; | |
1633 | return -1; | |
1634 | } | |
1635 | if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0) | |
1636 | { | |
1637 | errno = EACCES; | |
1638 | return -1; | |
1639 | } | |
1640 | if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) | |
1641 | { | |
1642 | errno = EACCES; | |
1643 | return -1; | |
1644 | } | |
1645 | return 0; | |
480b0c5b GV |
1646 | } |
1647 | ||
1648 | int | |
1649 | sys_chdir (const char * path) | |
1650 | { | |
fbd6baed | 1651 | return _chdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1652 | } |
1653 | ||
1654 | int | |
1655 | sys_chmod (const char * path, int mode) | |
1656 | { | |
fbd6baed | 1657 | return _chmod (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1658 | } |
1659 | ||
1660 | int | |
1661 | sys_creat (const char * path, int mode) | |
1662 | { | |
fbd6baed | 1663 | return _creat (map_w32_filename (path, NULL), mode); |
480b0c5b GV |
1664 | } |
1665 | ||
1666 | FILE * | |
1667 | sys_fopen(const char * path, const char * mode) | |
1668 | { | |
1669 | int fd; | |
1670 | int oflag; | |
1671 | const char * mode_save = mode; | |
1672 | ||
1673 | /* Force all file handles to be non-inheritable. This is necessary to | |
1674 | ensure child processes don't unwittingly inherit handles that might | |
1675 | prevent future file access. */ | |
1676 | ||
1677 | if (mode[0] == 'r') | |
1678 | oflag = O_RDONLY; | |
1679 | else if (mode[0] == 'w' || mode[0] == 'a') | |
1680 | oflag = O_WRONLY | O_CREAT | O_TRUNC; | |
95ed0025 | 1681 | else |
480b0c5b GV |
1682 | return NULL; |
1683 | ||
1684 | /* Only do simplistic option parsing. */ | |
1685 | while (*++mode) | |
1686 | if (mode[0] == '+') | |
1687 | { | |
1688 | oflag &= ~(O_RDONLY | O_WRONLY); | |
1689 | oflag |= O_RDWR; | |
1690 | } | |
1691 | else if (mode[0] == 'b') | |
1692 | { | |
1693 | oflag &= ~O_TEXT; | |
1694 | oflag |= O_BINARY; | |
1695 | } | |
1696 | else if (mode[0] == 't') | |
1697 | { | |
1698 | oflag &= ~O_BINARY; | |
1699 | oflag |= O_TEXT; | |
1700 | } | |
1701 | else break; | |
1702 | ||
fbd6baed | 1703 | fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644); |
480b0c5b GV |
1704 | if (fd < 0) |
1705 | return NULL; | |
1706 | ||
76b3903d | 1707 | return _fdopen (fd, mode_save); |
95ed0025 | 1708 | } |
480b0c5b | 1709 | |
76b3903d | 1710 | /* This only works on NTFS volumes, but is useful to have. */ |
480b0c5b | 1711 | int |
76b3903d | 1712 | sys_link (const char * old, const char * new) |
480b0c5b | 1713 | { |
76b3903d GV |
1714 | HANDLE fileh; |
1715 | int result = -1; | |
1716 | char oldname[MAX_PATH], newname[MAX_PATH]; | |
1717 | ||
1718 | if (old == NULL || new == NULL) | |
1719 | { | |
1720 | errno = ENOENT; | |
1721 | return -1; | |
1722 | } | |
1723 | ||
1724 | strcpy (oldname, map_w32_filename (old, NULL)); | |
1725 | strcpy (newname, map_w32_filename (new, NULL)); | |
1726 | ||
1727 | fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING, | |
1728 | FILE_FLAG_BACKUP_SEMANTICS, NULL); | |
1729 | if (fileh != INVALID_HANDLE_VALUE) | |
1730 | { | |
1731 | int wlen; | |
1732 | ||
1733 | /* Confusingly, the "alternate" stream name field does not apply | |
1734 | when restoring a hard link, and instead contains the actual | |
1735 | stream data for the link (ie. the name of the link to create). | |
1736 | The WIN32_STREAM_ID structure before the cStreamName field is | |
1737 | the stream header, which is then immediately followed by the | |
1738 | stream data. */ | |
1739 | ||
1740 | struct { | |
1741 | WIN32_STREAM_ID wid; | |
1742 | WCHAR wbuffer[MAX_PATH]; /* extra space for link name */ | |
1743 | } data; | |
1744 | ||
1745 | wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1, | |
1746 | data.wid.cStreamName, MAX_PATH); | |
1747 | if (wlen > 0) | |
1748 | { | |
1749 | LPVOID context = NULL; | |
1750 | DWORD wbytes = 0; | |
1751 | ||
1752 | data.wid.dwStreamId = BACKUP_LINK; | |
1753 | data.wid.dwStreamAttributes = 0; | |
1754 | data.wid.Size.LowPart = wlen * sizeof(WCHAR); | |
1755 | data.wid.Size.HighPart = 0; | |
1756 | data.wid.dwStreamNameSize = 0; | |
1757 | ||
1758 | if (BackupWrite (fileh, (LPBYTE)&data, | |
1759 | offsetof (WIN32_STREAM_ID, cStreamName) | |
1760 | + data.wid.Size.LowPart, | |
1761 | &wbytes, FALSE, FALSE, &context) | |
1762 | && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context)) | |
1763 | { | |
1764 | /* succeeded */ | |
1765 | result = 0; | |
1766 | } | |
1767 | else | |
1768 | { | |
1769 | /* Should try mapping GetLastError to errno; for now just | |
1770 | indicate a general error (eg. links not supported). */ | |
1771 | errno = EINVAL; // perhaps EMLINK? | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | CloseHandle (fileh); | |
1776 | } | |
1777 | else | |
1778 | errno = ENOENT; | |
1779 | ||
1780 | return result; | |
480b0c5b GV |
1781 | } |
1782 | ||
1783 | int | |
1784 | sys_mkdir (const char * path) | |
1785 | { | |
fbd6baed | 1786 | return _mkdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1787 | } |
1788 | ||
9d1778b1 RS |
1789 | /* Because of long name mapping issues, we need to implement this |
1790 | ourselves. Also, MSVC's _mktemp returns NULL when it can't generate | |
1791 | a unique name, instead of setting the input template to an empty | |
1792 | string. | |
1793 | ||
1794 | Standard algorithm seems to be use pid or tid with a letter on the | |
1795 | front (in place of the 6 X's) and cycle through the letters to find a | |
1796 | unique name. We extend that to allow any reasonable character as the | |
1797 | first of the 6 X's. */ | |
480b0c5b GV |
1798 | char * |
1799 | sys_mktemp (char * template) | |
1800 | { | |
9d1778b1 RS |
1801 | char * p; |
1802 | int i; | |
1803 | unsigned uid = GetCurrentThreadId (); | |
1804 | static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#"; | |
1805 | ||
1806 | if (template == NULL) | |
1807 | return NULL; | |
1808 | p = template + strlen (template); | |
1809 | i = 5; | |
1810 | /* replace up to the last 5 X's with uid in decimal */ | |
1811 | while (--p >= template && p[0] == 'X' && --i >= 0) | |
1812 | { | |
1813 | p[0] = '0' + uid % 10; | |
1814 | uid /= 10; | |
1815 | } | |
1816 | ||
1817 | if (i < 0 && p[0] == 'X') | |
1818 | { | |
1819 | i = 0; | |
1820 | do | |
1821 | { | |
1822 | int save_errno = errno; | |
1823 | p[0] = first_char[i]; | |
1824 | if (sys_access (template, 0) < 0) | |
1825 | { | |
1826 | errno = save_errno; | |
1827 | return template; | |
1828 | } | |
1829 | } | |
1830 | while (++i < sizeof (first_char)); | |
1831 | } | |
1832 | ||
1833 | /* Template is badly formed or else we can't generate a unique name, | |
1834 | so return empty string */ | |
1835 | template[0] = 0; | |
1836 | return template; | |
480b0c5b GV |
1837 | } |
1838 | ||
1839 | int | |
1840 | sys_open (const char * path, int oflag, int mode) | |
1841 | { | |
302f0b29 GM |
1842 | const char* mpath = map_w32_filename (path, NULL); |
1843 | /* Try to open file without _O_CREAT, to be able to write to hidden | |
1844 | and system files. Force all file handles to be | |
1845 | non-inheritable. */ | |
1846 | int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode); | |
1847 | if (res >= 0) | |
1848 | return res; | |
1849 | return _open (mpath, oflag | _O_NOINHERIT, mode); | |
480b0c5b GV |
1850 | } |
1851 | ||
1852 | int | |
1853 | sys_rename (const char * oldname, const char * newname) | |
1854 | { | |
cfb5e855 | 1855 | BOOL result; |
b3308d2e | 1856 | char temp[MAX_PATH]; |
480b0c5b | 1857 | |
e9e23e23 | 1858 | /* MoveFile on Windows 95 doesn't correctly change the short file name |
5162ffce MB |
1859 | alias in a number of circumstances (it is not easy to predict when |
1860 | just by looking at oldname and newname, unfortunately). In these | |
1861 | cases, renaming through a temporary name avoids the problem. | |
1862 | ||
e9e23e23 | 1863 | A second problem on Windows 95 is that renaming through a temp name when |
5162ffce MB |
1864 | newname is uppercase fails (the final long name ends up in |
1865 | lowercase, although the short alias might be uppercase) UNLESS the | |
1866 | long temp name is not 8.3. | |
1867 | ||
e9e23e23 | 1868 | So, on Windows 95 we always rename through a temp name, and we make sure |
5162ffce | 1869 | the temp name has a long extension to ensure correct renaming. */ |
480b0c5b | 1870 | |
fbd6baed | 1871 | strcpy (temp, map_w32_filename (oldname, NULL)); |
480b0c5b | 1872 | |
76b3903d | 1873 | if (os_subtype == OS_WIN95) |
480b0c5b | 1874 | { |
b3308d2e | 1875 | char * o; |
480b0c5b | 1876 | char * p; |
b3308d2e KH |
1877 | int i = 0; |
1878 | ||
1879 | oldname = map_w32_filename (oldname, NULL); | |
1880 | if (o = strrchr (oldname, '\\')) | |
1881 | o++; | |
1882 | else | |
1883 | o = (char *) oldname; | |
480b0c5b | 1884 | |
480b0c5b GV |
1885 | if (p = strrchr (temp, '\\')) |
1886 | p++; | |
1887 | else | |
1888 | p = temp; | |
b3308d2e KH |
1889 | |
1890 | do | |
1891 | { | |
1892 | /* Force temp name to require a manufactured 8.3 alias - this | |
1893 | seems to make the second rename work properly. */ | |
f313ee82 | 1894 | sprintf (p, "_.%s.%u", o, i); |
b3308d2e | 1895 | i++; |
58f0cb7e | 1896 | result = rename (oldname, temp); |
b3308d2e KH |
1897 | } |
1898 | /* This loop must surely terminate! */ | |
cfb5e855 | 1899 | while (result < 0 && errno == EEXIST); |
58f0cb7e | 1900 | if (result < 0) |
480b0c5b GV |
1901 | return -1; |
1902 | } | |
1903 | ||
1904 | /* Emulate Unix behaviour - newname is deleted if it already exists | |
5162ffce | 1905 | (at least if it is a file; don't do this for directories). |
76b3903d | 1906 | |
b3308d2e KH |
1907 | Since we mustn't do this if we are just changing the case of the |
1908 | file name (we would end up deleting the file we are trying to | |
1909 | rename!), we let rename detect if the destination file already | |
1910 | exists - that way we avoid the possible pitfalls of trying to | |
1911 | determine ourselves whether two names really refer to the same | |
1912 | file, which is not always possible in the general case. (Consider | |
1913 | all the permutations of shared or subst'd drives, etc.) */ | |
1914 | ||
1915 | newname = map_w32_filename (newname, NULL); | |
eb9ea53f | 1916 | result = rename (temp, newname); |
b3308d2e KH |
1917 | |
1918 | if (result < 0 | |
cfb5e855 | 1919 | && errno == EEXIST |
b3308d2e KH |
1920 | && _chmod (newname, 0666) == 0 |
1921 | && _unlink (newname) == 0) | |
1922 | result = rename (temp, newname); | |
480b0c5b | 1923 | |
eb9ea53f | 1924 | return result; |
480b0c5b GV |
1925 | } |
1926 | ||
1927 | int | |
1928 | sys_rmdir (const char * path) | |
1929 | { | |
fbd6baed | 1930 | return _rmdir (map_w32_filename (path, NULL)); |
480b0c5b GV |
1931 | } |
1932 | ||
1933 | int | |
1934 | sys_unlink (const char * path) | |
1935 | { | |
16bb7578 GV |
1936 | path = map_w32_filename (path, NULL); |
1937 | ||
1938 | /* On Unix, unlink works without write permission. */ | |
1939 | _chmod (path, 0666); | |
1940 | return _unlink (path); | |
480b0c5b GV |
1941 | } |
1942 | ||
1943 | static FILETIME utc_base_ft; | |
1944 | static long double utc_base; | |
1945 | static int init = 0; | |
1946 | ||
1947 | static time_t | |
1948 | convert_time (FILETIME ft) | |
1949 | { | |
1950 | long double ret; | |
1951 | ||
1952 | if (!init) | |
1953 | { | |
1954 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1955 | SYSTEMTIME st; | |
1956 | ||
1957 | st.wYear = 1970; | |
1958 | st.wMonth = 1; | |
1959 | st.wDay = 1; | |
1960 | st.wHour = 0; | |
1961 | st.wMinute = 0; | |
1962 | st.wSecond = 0; | |
1963 | st.wMilliseconds = 0; | |
1964 | ||
1965 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1966 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1967 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
1968 | init = 1; | |
1969 | } | |
1970 | ||
1971 | if (CompareFileTime (&ft, &utc_base_ft) < 0) | |
1972 | return 0; | |
1973 | ||
1974 | ret = (long double) ft.dwHighDateTime * 4096 * 1024 * 1024 + ft.dwLowDateTime; | |
1975 | ret -= utc_base; | |
1976 | return (time_t) (ret * 1e-7); | |
1977 | } | |
1978 | ||
480b0c5b GV |
1979 | void |
1980 | convert_from_time_t (time_t time, FILETIME * pft) | |
1981 | { | |
1982 | long double tmp; | |
1983 | ||
1984 | if (!init) | |
1985 | { | |
1986 | /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */ | |
1987 | SYSTEMTIME st; | |
1988 | ||
1989 | st.wYear = 1970; | |
1990 | st.wMonth = 1; | |
1991 | st.wDay = 1; | |
1992 | st.wHour = 0; | |
1993 | st.wMinute = 0; | |
1994 | st.wSecond = 0; | |
1995 | st.wMilliseconds = 0; | |
1996 | ||
1997 | SystemTimeToFileTime (&st, &utc_base_ft); | |
1998 | utc_base = (long double) utc_base_ft.dwHighDateTime | |
1999 | * 4096 * 1024 * 1024 + utc_base_ft.dwLowDateTime; | |
2000 | init = 1; | |
2001 | } | |
2002 | ||
2003 | /* time in 100ns units since 1-Jan-1601 */ | |
2004 | tmp = (long double) time * 1e7 + utc_base; | |
2005 | pft->dwHighDateTime = (DWORD) (tmp / (4096.0 * 1024 * 1024)); | |
16bb7578 | 2006 | pft->dwLowDateTime = (DWORD) (tmp - (4096.0 * 1024 * 1024) * pft->dwHighDateTime); |
480b0c5b | 2007 | } |
480b0c5b | 2008 | |
76b3903d GV |
2009 | #if 0 |
2010 | /* No reason to keep this; faking inode values either by hashing or even | |
2011 | using the file index from GetInformationByHandle, is not perfect and | |
2012 | so by default Emacs doesn't use the inode values on Windows. | |
2013 | Instead, we now determine file-truename correctly (except for | |
2014 | possible drive aliasing etc). */ | |
2015 | ||
2016 | /* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */ | |
480b0c5b | 2017 | static unsigned |
76b3903d | 2018 | hashval (const unsigned char * str) |
480b0c5b GV |
2019 | { |
2020 | unsigned h = 0; | |
480b0c5b GV |
2021 | while (*str) |
2022 | { | |
2023 | h = (h << 4) + *str++; | |
76b3903d | 2024 | h ^= (h >> 28); |
480b0c5b GV |
2025 | } |
2026 | return h; | |
2027 | } | |
2028 | ||
2029 | /* Return the hash value of the canonical pathname, excluding the | |
2030 | drive/UNC header, to get a hopefully unique inode number. */ | |
76b3903d | 2031 | static DWORD |
480b0c5b GV |
2032 | generate_inode_val (const char * name) |
2033 | { | |
2034 | char fullname[ MAX_PATH ]; | |
2035 | char * p; | |
2036 | unsigned hash; | |
2037 | ||
76b3903d GV |
2038 | /* Get the truly canonical filename, if it exists. (Note: this |
2039 | doesn't resolve aliasing due to subst commands, or recognise hard | |
2040 | links. */ | |
2041 | if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH)) | |
2042 | abort (); | |
2043 | ||
2044 | parse_root (fullname, &p); | |
fbd6baed | 2045 | /* Normal W32 filesystems are still case insensitive. */ |
480b0c5b | 2046 | _strlwr (p); |
76b3903d | 2047 | return hashval (p); |
480b0c5b GV |
2048 | } |
2049 | ||
76b3903d GV |
2050 | #endif |
2051 | ||
480b0c5b GV |
2052 | /* MSVC stat function can't cope with UNC names and has other bugs, so |
2053 | replace it with our own. This also allows us to calculate consistent | |
2054 | inode values without hacks in the main Emacs code. */ | |
2055 | int | |
2056 | stat (const char * path, struct stat * buf) | |
2057 | { | |
eb9ea53f | 2058 | char *name, *r; |
480b0c5b GV |
2059 | WIN32_FIND_DATA wfd; |
2060 | HANDLE fh; | |
76b3903d | 2061 | DWORD fake_inode; |
480b0c5b GV |
2062 | int permission; |
2063 | int len; | |
2064 | int rootdir = FALSE; | |
2065 | ||
2066 | if (path == NULL || buf == NULL) | |
2067 | { | |
2068 | errno = EFAULT; | |
2069 | return -1; | |
2070 | } | |
2071 | ||
fbd6baed | 2072 | name = (char *) map_w32_filename (path, &path); |
9ab8560d | 2073 | /* must be valid filename, no wild cards or other invalid characters */ |
bb1584c8 | 2074 | if (strpbrk (name, "*?|<>\"")) |
480b0c5b GV |
2075 | { |
2076 | errno = ENOENT; | |
2077 | return -1; | |
2078 | } | |
2079 | ||
eb9ea53f GV |
2080 | /* If name is "c:/.." or "/.." then stat "c:/" or "/". */ |
2081 | r = IS_DEVICE_SEP (name[1]) ? &name[2] : name; | |
2082 | if (IS_DIRECTORY_SEP (r[0]) && r[1] == '.' && r[2] == '.' && r[3] == '\0') | |
2083 | { | |
2084 | r[1] = r[2] = '\0'; | |
2085 | } | |
2086 | ||
480b0c5b GV |
2087 | /* Remove trailing directory separator, unless name is the root |
2088 | directory of a drive or UNC volume in which case ensure there | |
2089 | is a trailing separator. */ | |
2090 | len = strlen (name); | |
2091 | rootdir = (path >= name + len - 1 | |
2092 | && (IS_DIRECTORY_SEP (*path) || *path == 0)); | |
2093 | name = strcpy (alloca (len + 2), name); | |
2094 | ||
9d3355d1 GV |
2095 | if (is_unc_volume (name)) |
2096 | { | |
2097 | DWORD attrs = unc_volume_file_attributes (name); | |
2098 | ||
2099 | if (attrs == -1) | |
2100 | return -1; | |
2101 | ||
2102 | memset (&wfd, 0, sizeof (wfd)); | |
2103 | wfd.dwFileAttributes = attrs; | |
2104 | wfd.ftCreationTime = utc_base_ft; | |
2105 | wfd.ftLastAccessTime = utc_base_ft; | |
2106 | wfd.ftLastWriteTime = utc_base_ft; | |
2107 | strcpy (wfd.cFileName, name); | |
2108 | } | |
2109 | else if (rootdir) | |
480b0c5b GV |
2110 | { |
2111 | if (!IS_DIRECTORY_SEP (name[len-1])) | |
2112 | strcat (name, "\\"); | |
2113 | if (GetDriveType (name) < 2) | |
2114 | { | |
2115 | errno = ENOENT; | |
2116 | return -1; | |
2117 | } | |
2118 | memset (&wfd, 0, sizeof (wfd)); | |
2119 | wfd.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; | |
2120 | wfd.ftCreationTime = utc_base_ft; | |
2121 | wfd.ftLastAccessTime = utc_base_ft; | |
2122 | wfd.ftLastWriteTime = utc_base_ft; | |
2123 | strcpy (wfd.cFileName, name); | |
2124 | } | |
2125 | else | |
2126 | { | |
2127 | if (IS_DIRECTORY_SEP (name[len-1])) | |
2128 | name[len - 1] = 0; | |
76b3903d GV |
2129 | |
2130 | /* (This is hacky, but helps when doing file completions on | |
2131 | network drives.) Optimize by using information available from | |
2132 | active readdir if possible. */ | |
b19cc00c GV |
2133 | len = strlen (dir_pathname); |
2134 | if (IS_DIRECTORY_SEP (dir_pathname[len-1])) | |
2135 | len--; | |
76b3903d | 2136 | if (dir_find_handle != INVALID_HANDLE_VALUE |
b19cc00c | 2137 | && strnicmp (name, dir_pathname, len) == 0 |
76b3903d GV |
2138 | && IS_DIRECTORY_SEP (name[len]) |
2139 | && stricmp (name + len + 1, dir_static.d_name) == 0) | |
480b0c5b | 2140 | { |
76b3903d GV |
2141 | /* This was the last entry returned by readdir. */ |
2142 | wfd = dir_find_data; | |
2143 | } | |
2144 | else | |
2145 | { | |
2146 | fh = FindFirstFile (name, &wfd); | |
2147 | if (fh == INVALID_HANDLE_VALUE) | |
2148 | { | |
2149 | errno = ENOENT; | |
2150 | return -1; | |
2151 | } | |
2152 | FindClose (fh); | |
480b0c5b | 2153 | } |
480b0c5b GV |
2154 | } |
2155 | ||
93e0f0da JR |
2156 | if (!NILP (Vw32_get_true_file_attributes) |
2157 | /* No access rights required to get info. */ | |
2158 | && (fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING, | |
2159 | FILE_FLAG_BACKUP_SEMANTICS, NULL)) | |
2160 | != INVALID_HANDLE_VALUE) | |
480b0c5b | 2161 | { |
480b0c5b GV |
2162 | /* This is more accurate in terms of gettting the correct number |
2163 | of links, but is quite slow (it is noticable when Emacs is | |
2164 | making a list of file name completions). */ | |
2165 | BY_HANDLE_FILE_INFORMATION info; | |
2166 | ||
480b0c5b GV |
2167 | if (GetFileInformationByHandle (fh, &info)) |
2168 | { | |
480b0c5b | 2169 | buf->st_nlink = info.nNumberOfLinks; |
76b3903d GV |
2170 | /* Might as well use file index to fake inode values, but this |
2171 | is not guaranteed to be unique unless we keep a handle open | |
2172 | all the time (even then there are situations where it is | |
2173 | not unique). Reputedly, there are at most 48 bits of info | |
2174 | (on NTFS, presumably less on FAT). */ | |
2175 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
480b0c5b GV |
2176 | } |
2177 | else | |
2178 | { | |
01f31dfb AI |
2179 | buf->st_nlink = 1; |
2180 | fake_inode = 0; | |
2181 | } | |
2182 | ||
93e0f0da | 2183 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) |
01f31dfb | 2184 | { |
93e0f0da JR |
2185 | buf->st_mode = _S_IFDIR; |
2186 | } | |
2187 | else | |
2188 | { | |
2189 | switch (GetFileType (fh)) | |
2190 | { | |
2191 | case FILE_TYPE_DISK: | |
2192 | buf->st_mode = _S_IFREG; | |
2193 | break; | |
2194 | case FILE_TYPE_PIPE: | |
2195 | buf->st_mode = _S_IFIFO; | |
2196 | break; | |
2197 | case FILE_TYPE_CHAR: | |
2198 | case FILE_TYPE_UNKNOWN: | |
2199 | default: | |
2200 | buf->st_mode = _S_IFCHR; | |
2201 | } | |
480b0c5b | 2202 | } |
01f31dfb | 2203 | CloseHandle (fh); |
76b3903d GV |
2204 | } |
2205 | else | |
2206 | { | |
2207 | /* Don't bother to make this information more accurate. */ | |
93e0f0da | 2208 | buf->st_mode = (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? |
bc5fdfc7 | 2209 | _S_IFDIR : _S_IFREG; |
480b0c5b | 2210 | buf->st_nlink = 1; |
76b3903d GV |
2211 | fake_inode = 0; |
2212 | } | |
2213 | ||
2214 | #if 0 | |
2215 | /* Not sure if there is any point in this. */ | |
2216 | if (!NILP (Vw32_generate_fake_inodes)) | |
2217 | fake_inode = generate_inode_val (name); | |
2218 | else if (fake_inode == 0) | |
2219 | { | |
2220 | /* For want of something better, try to make everything unique. */ | |
2221 | static DWORD gen_num = 0; | |
2222 | fake_inode = ++gen_num; | |
480b0c5b | 2223 | } |
76b3903d GV |
2224 | #endif |
2225 | ||
2226 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2227 | if (sizeof (buf->st_ino) == 2) | |
2228 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2229 | else | |
2230 | buf->st_ino = fake_inode; | |
480b0c5b GV |
2231 | |
2232 | /* consider files to belong to current user */ | |
2233 | buf->st_uid = the_passwd.pw_uid; | |
2234 | buf->st_gid = the_passwd.pw_gid; | |
2235 | ||
fbd6baed | 2236 | /* volume_info is set indirectly by map_w32_filename */ |
480b0c5b GV |
2237 | buf->st_dev = volume_info.serialnum; |
2238 | buf->st_rdev = volume_info.serialnum; | |
2239 | ||
480b0c5b GV |
2240 | |
2241 | buf->st_size = wfd.nFileSizeLow; | |
2242 | ||
2243 | /* Convert timestamps to Unix format. */ | |
2244 | buf->st_mtime = convert_time (wfd.ftLastWriteTime); | |
2245 | buf->st_atime = convert_time (wfd.ftLastAccessTime); | |
2246 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2247 | buf->st_ctime = convert_time (wfd.ftCreationTime); | |
2248 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2249 | ||
2250 | /* determine rwx permissions */ | |
2251 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2252 | permission = _S_IREAD; | |
2253 | else | |
2254 | permission = _S_IREAD | _S_IWRITE; | |
2255 | ||
2256 | if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2257 | permission |= _S_IEXEC; | |
b3308d2e KH |
2258 | else if (is_exec (name)) |
2259 | permission |= _S_IEXEC; | |
480b0c5b GV |
2260 | |
2261 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
16bb7578 GV |
2266 | /* Provide fstat and utime as well as stat for consistent handling of |
2267 | file timestamps. */ | |
2268 | int | |
2269 | fstat (int desc, struct stat * buf) | |
2270 | { | |
2271 | HANDLE fh = (HANDLE) _get_osfhandle (desc); | |
2272 | BY_HANDLE_FILE_INFORMATION info; | |
2273 | DWORD fake_inode; | |
2274 | int permission; | |
2275 | ||
2276 | switch (GetFileType (fh) & ~FILE_TYPE_REMOTE) | |
2277 | { | |
2278 | case FILE_TYPE_DISK: | |
2279 | buf->st_mode = _S_IFREG; | |
2280 | if (!GetFileInformationByHandle (fh, &info)) | |
2281 | { | |
2282 | errno = EACCES; | |
2283 | return -1; | |
2284 | } | |
2285 | break; | |
2286 | case FILE_TYPE_PIPE: | |
2287 | buf->st_mode = _S_IFIFO; | |
2288 | goto non_disk; | |
2289 | case FILE_TYPE_CHAR: | |
2290 | case FILE_TYPE_UNKNOWN: | |
2291 | default: | |
2292 | buf->st_mode = _S_IFCHR; | |
2293 | non_disk: | |
2294 | memset (&info, 0, sizeof (info)); | |
2295 | info.dwFileAttributes = 0; | |
2296 | info.ftCreationTime = utc_base_ft; | |
2297 | info.ftLastAccessTime = utc_base_ft; | |
2298 | info.ftLastWriteTime = utc_base_ft; | |
2299 | } | |
2300 | ||
2301 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
16bb7578 | 2302 | buf->st_mode = _S_IFDIR; |
93e0f0da JR |
2303 | |
2304 | buf->st_nlink = info.nNumberOfLinks; | |
2305 | /* Might as well use file index to fake inode values, but this | |
2306 | is not guaranteed to be unique unless we keep a handle open | |
2307 | all the time (even then there are situations where it is | |
2308 | not unique). Reputedly, there are at most 48 bits of info | |
2309 | (on NTFS, presumably less on FAT). */ | |
2310 | fake_inode = info.nFileIndexLow ^ info.nFileIndexHigh; | |
16bb7578 GV |
2311 | |
2312 | /* MSVC defines _ino_t to be short; other libc's might not. */ | |
2313 | if (sizeof (buf->st_ino) == 2) | |
2314 | buf->st_ino = fake_inode ^ (fake_inode >> 16); | |
2315 | else | |
2316 | buf->st_ino = fake_inode; | |
2317 | ||
2318 | /* consider files to belong to current user */ | |
2319 | buf->st_uid = 0; | |
2320 | buf->st_gid = 0; | |
2321 | ||
2322 | buf->st_dev = info.dwVolumeSerialNumber; | |
2323 | buf->st_rdev = info.dwVolumeSerialNumber; | |
2324 | ||
2325 | buf->st_size = info.nFileSizeLow; | |
2326 | ||
2327 | /* Convert timestamps to Unix format. */ | |
2328 | buf->st_mtime = convert_time (info.ftLastWriteTime); | |
2329 | buf->st_atime = convert_time (info.ftLastAccessTime); | |
2330 | if (buf->st_atime == 0) buf->st_atime = buf->st_mtime; | |
2331 | buf->st_ctime = convert_time (info.ftCreationTime); | |
2332 | if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime; | |
2333 | ||
2334 | /* determine rwx permissions */ | |
2335 | if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) | |
2336 | permission = _S_IREAD; | |
2337 | else | |
2338 | permission = _S_IREAD | _S_IWRITE; | |
2339 | ||
2340 | if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) | |
2341 | permission |= _S_IEXEC; | |
2342 | else | |
2343 | { | |
2344 | #if 0 /* no way of knowing the filename */ | |
2345 | char * p = strrchr (name, '.'); | |
2346 | if (p != NULL && | |
2347 | (stricmp (p, ".exe") == 0 || | |
2348 | stricmp (p, ".com") == 0 || | |
2349 | stricmp (p, ".bat") == 0 || | |
2350 | stricmp (p, ".cmd") == 0)) | |
2351 | permission |= _S_IEXEC; | |
2352 | #endif | |
2353 | } | |
2354 | ||
2355 | buf->st_mode |= permission | (permission >> 3) | (permission >> 6); | |
2356 | ||
2357 | return 0; | |
2358 | } | |
2359 | ||
2360 | int | |
2361 | utime (const char *name, struct utimbuf *times) | |
2362 | { | |
2363 | struct utimbuf deftime; | |
2364 | HANDLE fh; | |
2365 | FILETIME mtime; | |
2366 | FILETIME atime; | |
2367 | ||
2368 | if (times == NULL) | |
2369 | { | |
2370 | deftime.modtime = deftime.actime = time (NULL); | |
2371 | times = &deftime; | |
2372 | } | |
2373 | ||
2374 | /* Need write access to set times. */ | |
2375 | fh = CreateFile (name, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, | |
2376 | 0, OPEN_EXISTING, 0, NULL); | |
2377 | if (fh) | |
2378 | { | |
2379 | convert_from_time_t (times->actime, &atime); | |
2380 | convert_from_time_t (times->modtime, &mtime); | |
2381 | if (!SetFileTime (fh, NULL, &atime, &mtime)) | |
2382 | { | |
2383 | CloseHandle (fh); | |
2384 | errno = EACCES; | |
2385 | return -1; | |
2386 | } | |
2387 | CloseHandle (fh); | |
2388 | } | |
2389 | else | |
2390 | { | |
2391 | errno = EINVAL; | |
2392 | return -1; | |
2393 | } | |
2394 | return 0; | |
2395 | } | |
2396 | ||
480b0c5b GV |
2397 | #ifdef HAVE_SOCKETS |
2398 | ||
2399 | /* Wrappers for winsock functions to map between our file descriptors | |
2400 | and winsock's handles; also set h_errno for convenience. | |
2401 | ||
2402 | To allow Emacs to run on systems which don't have winsock support | |
2403 | installed, we dynamically link to winsock on startup if present, and | |
2404 | otherwise provide the minimum necessary functionality | |
2405 | (eg. gethostname). */ | |
2406 | ||
2407 | /* function pointers for relevant socket functions */ | |
2408 | int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData); | |
2409 | void (PASCAL *pfn_WSASetLastError) (int iError); | |
2410 | int (PASCAL *pfn_WSAGetLastError) (void); | |
2411 | int (PASCAL *pfn_socket) (int af, int type, int protocol); | |
2412 | int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2413 | int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen); | |
2414 | int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp); | |
2415 | int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags); | |
2416 | int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags); | |
2417 | int (PASCAL *pfn_closesocket) (SOCKET s); | |
2418 | int (PASCAL *pfn_shutdown) (SOCKET s, int how); | |
2419 | int (PASCAL *pfn_WSACleanup) (void); | |
2420 | ||
2421 | u_short (PASCAL *pfn_htons) (u_short hostshort); | |
2422 | u_short (PASCAL *pfn_ntohs) (u_short netshort); | |
2423 | unsigned long (PASCAL *pfn_inet_addr) (const char * cp); | |
2424 | int (PASCAL *pfn_gethostname) (char * name, int namelen); | |
2425 | struct hostent * (PASCAL *pfn_gethostbyname) (const char * name); | |
2426 | struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto); | |
ecd270eb | 2427 | int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen); |
962955c5 JR |
2428 | int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname, |
2429 | const char * optval, int optlen); | |
2430 | int (PASCAL *pfn_listen) (SOCKET s, int backlog); | |
2431 | int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name, | |
2432 | int * namelen); | |
2433 | SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen); | |
2434 | int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags, | |
2435 | struct sockaddr * from, int * fromlen); | |
2436 | int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags, | |
2437 | const struct sockaddr * to, int tolen); | |
2438 | ||
f1614061 RS |
2439 | /* SetHandleInformation is only needed to make sockets non-inheritable. */ |
2440 | BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags); | |
2441 | #ifndef HANDLE_FLAG_INHERIT | |
2442 | #define HANDLE_FLAG_INHERIT 1 | |
2443 | #endif | |
480b0c5b | 2444 | |
f249a012 RS |
2445 | HANDLE winsock_lib; |
2446 | static int winsock_inuse; | |
480b0c5b | 2447 | |
f249a012 | 2448 | BOOL |
480b0c5b GV |
2449 | term_winsock (void) |
2450 | { | |
f249a012 | 2451 | if (winsock_lib != NULL && winsock_inuse == 0) |
480b0c5b | 2452 | { |
f249a012 RS |
2453 | /* Not sure what would cause WSAENETDOWN, or even if it can happen |
2454 | after WSAStartup returns successfully, but it seems reasonable | |
2455 | to allow unloading winsock anyway in that case. */ | |
2456 | if (pfn_WSACleanup () == 0 || | |
2457 | pfn_WSAGetLastError () == WSAENETDOWN) | |
2458 | { | |
2459 | if (FreeLibrary (winsock_lib)) | |
2460 | winsock_lib = NULL; | |
2461 | return TRUE; | |
2462 | } | |
480b0c5b | 2463 | } |
f249a012 | 2464 | return FALSE; |
480b0c5b GV |
2465 | } |
2466 | ||
f249a012 RS |
2467 | BOOL |
2468 | init_winsock (int load_now) | |
480b0c5b GV |
2469 | { |
2470 | WSADATA winsockData; | |
2471 | ||
f249a012 RS |
2472 | if (winsock_lib != NULL) |
2473 | return TRUE; | |
f1614061 RS |
2474 | |
2475 | pfn_SetHandleInformation = NULL; | |
2476 | pfn_SetHandleInformation | |
2477 | = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
2478 | "SetHandleInformation"); | |
2479 | ||
480b0c5b GV |
2480 | winsock_lib = LoadLibrary ("wsock32.dll"); |
2481 | ||
2482 | if (winsock_lib != NULL) | |
2483 | { | |
2484 | /* dynamically link to socket functions */ | |
2485 | ||
2486 | #define LOAD_PROC(fn) \ | |
2487 | if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \ | |
2488 | goto fail; | |
2489 | ||
2490 | LOAD_PROC( WSAStartup ); | |
2491 | LOAD_PROC( WSASetLastError ); | |
2492 | LOAD_PROC( WSAGetLastError ); | |
2493 | LOAD_PROC( socket ); | |
2494 | LOAD_PROC( bind ); | |
2495 | LOAD_PROC( connect ); | |
2496 | LOAD_PROC( ioctlsocket ); | |
2497 | LOAD_PROC( recv ); | |
2498 | LOAD_PROC( send ); | |
2499 | LOAD_PROC( closesocket ); | |
2500 | LOAD_PROC( shutdown ); | |
2501 | LOAD_PROC( htons ); | |
2502 | LOAD_PROC( ntohs ); | |
2503 | LOAD_PROC( inet_addr ); | |
2504 | LOAD_PROC( gethostname ); | |
2505 | LOAD_PROC( gethostbyname ); | |
2506 | LOAD_PROC( getservbyname ); | |
ecd270eb | 2507 | LOAD_PROC( getpeername ); |
480b0c5b | 2508 | LOAD_PROC( WSACleanup ); |
962955c5 JR |
2509 | LOAD_PROC( setsockopt ); |
2510 | LOAD_PROC( listen ); | |
2511 | LOAD_PROC( getsockname ); | |
2512 | LOAD_PROC( accept ); | |
2513 | LOAD_PROC( recvfrom ); | |
2514 | LOAD_PROC( sendto ); | |
f249a012 RS |
2515 | #undef LOAD_PROC |
2516 | ||
480b0c5b GV |
2517 | /* specify version 1.1 of winsock */ |
2518 | if (pfn_WSAStartup (0x101, &winsockData) == 0) | |
2519 | { | |
f249a012 RS |
2520 | if (winsockData.wVersion != 0x101) |
2521 | goto fail; | |
2522 | ||
2523 | if (!load_now) | |
2524 | { | |
2525 | /* Report that winsock exists and is usable, but leave | |
2526 | socket functions disabled. I am assuming that calling | |
2527 | WSAStartup does not require any network interaction, | |
2528 | and in particular does not cause or require a dial-up | |
2529 | connection to be established. */ | |
2530 | ||
2531 | pfn_WSACleanup (); | |
2532 | FreeLibrary (winsock_lib); | |
2533 | winsock_lib = NULL; | |
2534 | } | |
2535 | winsock_inuse = 0; | |
2536 | return TRUE; | |
480b0c5b GV |
2537 | } |
2538 | ||
2539 | fail: | |
2540 | FreeLibrary (winsock_lib); | |
f249a012 | 2541 | winsock_lib = NULL; |
480b0c5b | 2542 | } |
f249a012 RS |
2543 | |
2544 | return FALSE; | |
480b0c5b GV |
2545 | } |
2546 | ||
2547 | ||
2548 | int h_errno = 0; | |
2549 | ||
2550 | /* function to set h_errno for compatability; map winsock error codes to | |
2551 | normal system codes where they overlap (non-overlapping definitions | |
2552 | are already in <sys/socket.h> */ | |
2553 | static void set_errno () | |
2554 | { | |
f249a012 | 2555 | if (winsock_lib == NULL) |
480b0c5b GV |
2556 | h_errno = EINVAL; |
2557 | else | |
2558 | h_errno = pfn_WSAGetLastError (); | |
2559 | ||
2560 | switch (h_errno) | |
2561 | { | |
2562 | case WSAEACCES: h_errno = EACCES; break; | |
2563 | case WSAEBADF: h_errno = EBADF; break; | |
2564 | case WSAEFAULT: h_errno = EFAULT; break; | |
2565 | case WSAEINTR: h_errno = EINTR; break; | |
2566 | case WSAEINVAL: h_errno = EINVAL; break; | |
2567 | case WSAEMFILE: h_errno = EMFILE; break; | |
2568 | case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break; | |
2569 | case WSAENOTEMPTY: h_errno = ENOTEMPTY; break; | |
2570 | } | |
2571 | errno = h_errno; | |
2572 | } | |
2573 | ||
2574 | static void check_errno () | |
2575 | { | |
f249a012 | 2576 | if (h_errno == 0 && winsock_lib != NULL) |
480b0c5b GV |
2577 | pfn_WSASetLastError (0); |
2578 | } | |
2579 | ||
d8fcc1b9 AI |
2580 | /* Extend strerror to handle the winsock-specific error codes. */ |
2581 | struct { | |
2582 | int errnum; | |
2583 | char * msg; | |
2584 | } _wsa_errlist[] = { | |
2585 | WSAEINTR , "Interrupted function call", | |
2586 | WSAEBADF , "Bad file descriptor", | |
2587 | WSAEACCES , "Permission denied", | |
2588 | WSAEFAULT , "Bad address", | |
2589 | WSAEINVAL , "Invalid argument", | |
2590 | WSAEMFILE , "Too many open files", | |
2591 | ||
2592 | WSAEWOULDBLOCK , "Resource temporarily unavailable", | |
2593 | WSAEINPROGRESS , "Operation now in progress", | |
2594 | WSAEALREADY , "Operation already in progress", | |
2595 | WSAENOTSOCK , "Socket operation on non-socket", | |
2596 | WSAEDESTADDRREQ , "Destination address required", | |
2597 | WSAEMSGSIZE , "Message too long", | |
2598 | WSAEPROTOTYPE , "Protocol wrong type for socket", | |
2599 | WSAENOPROTOOPT , "Bad protocol option", | |
2600 | WSAEPROTONOSUPPORT , "Protocol not supported", | |
2601 | WSAESOCKTNOSUPPORT , "Socket type not supported", | |
2602 | WSAEOPNOTSUPP , "Operation not supported", | |
2603 | WSAEPFNOSUPPORT , "Protocol family not supported", | |
2604 | WSAEAFNOSUPPORT , "Address family not supported by protocol family", | |
2605 | WSAEADDRINUSE , "Address already in use", | |
2606 | WSAEADDRNOTAVAIL , "Cannot assign requested address", | |
2607 | WSAENETDOWN , "Network is down", | |
2608 | WSAENETUNREACH , "Network is unreachable", | |
2609 | WSAENETRESET , "Network dropped connection on reset", | |
2610 | WSAECONNABORTED , "Software caused connection abort", | |
2611 | WSAECONNRESET , "Connection reset by peer", | |
2612 | WSAENOBUFS , "No buffer space available", | |
2613 | WSAEISCONN , "Socket is already connected", | |
2614 | WSAENOTCONN , "Socket is not connected", | |
2615 | WSAESHUTDOWN , "Cannot send after socket shutdown", | |
2616 | WSAETOOMANYREFS , "Too many references", /* not sure */ | |
2617 | WSAETIMEDOUT , "Connection timed out", | |
2618 | WSAECONNREFUSED , "Connection refused", | |
2619 | WSAELOOP , "Network loop", /* not sure */ | |
2620 | WSAENAMETOOLONG , "Name is too long", | |
2621 | WSAEHOSTDOWN , "Host is down", | |
2622 | WSAEHOSTUNREACH , "No route to host", | |
2623 | WSAENOTEMPTY , "Buffer not empty", /* not sure */ | |
2624 | WSAEPROCLIM , "Too many processes", | |
2625 | WSAEUSERS , "Too many users", /* not sure */ | |
2626 | WSAEDQUOT , "Double quote in host name", /* really not sure */ | |
2627 | WSAESTALE , "Data is stale", /* not sure */ | |
2628 | WSAEREMOTE , "Remote error", /* not sure */ | |
2629 | ||
2630 | WSASYSNOTREADY , "Network subsystem is unavailable", | |
2631 | WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range", | |
2632 | WSANOTINITIALISED , "Winsock not initialized successfully", | |
2633 | WSAEDISCON , "Graceful shutdown in progress", | |
2634 | #ifdef WSAENOMORE | |
2635 | WSAENOMORE , "No more operations allowed", /* not sure */ | |
2636 | WSAECANCELLED , "Operation cancelled", /* not sure */ | |
2637 | WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider", | |
2638 | WSAEINVALIDPROVIDER , "Invalid service provider version number", | |
2639 | WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider", | |
2640 | WSASYSCALLFAILURE , "System call failured", | |
2641 | WSASERVICE_NOT_FOUND , "Service not found", /* not sure */ | |
2642 | WSATYPE_NOT_FOUND , "Class type not found", | |
2643 | WSA_E_NO_MORE , "No more resources available", /* really not sure */ | |
2644 | WSA_E_CANCELLED , "Operation already cancelled", /* really not sure */ | |
2645 | WSAEREFUSED , "Operation refused", /* not sure */ | |
2646 | #endif | |
2647 | ||
2648 | WSAHOST_NOT_FOUND , "Host not found", | |
2649 | WSATRY_AGAIN , "Authoritative host not found during name lookup", | |
2650 | WSANO_RECOVERY , "Non-recoverable error during name lookup", | |
2651 | WSANO_DATA , "Valid name, no data record of requested type", | |
2652 | ||
2653 | -1, NULL | |
2654 | }; | |
2655 | ||
2656 | char * | |
2657 | sys_strerror(int error_no) | |
2658 | { | |
2659 | int i; | |
2660 | static char unknown_msg[40]; | |
2661 | ||
a302c7ae AI |
2662 | if (error_no >= 0 && error_no < sys_nerr) |
2663 | return sys_errlist[error_no]; | |
d8fcc1b9 AI |
2664 | |
2665 | for (i = 0; _wsa_errlist[i].errnum >= 0; i++) | |
2666 | if (_wsa_errlist[i].errnum == error_no) | |
2667 | return _wsa_errlist[i].msg; | |
2668 | ||
2669 | sprintf(unknown_msg, "Unidentified error: %d", error_no); | |
2670 | return unknown_msg; | |
2671 | } | |
2672 | ||
480b0c5b GV |
2673 | /* [andrewi 3-May-96] I've had conflicting results using both methods, |
2674 | but I believe the method of keeping the socket handle separate (and | |
2675 | insuring it is not inheritable) is the correct one. */ | |
2676 | ||
2677 | //#define SOCK_REPLACE_HANDLE | |
2678 | ||
2679 | #ifdef SOCK_REPLACE_HANDLE | |
2680 | #define SOCK_HANDLE(fd) ((SOCKET) _get_osfhandle (fd)) | |
2681 | #else | |
2682 | #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd) | |
2683 | #endif | |
2684 | ||
962955c5 JR |
2685 | int socket_to_fd (SOCKET s); |
2686 | ||
480b0c5b GV |
2687 | int |
2688 | sys_socket(int af, int type, int protocol) | |
2689 | { | |
962955c5 | 2690 | SOCKET s; |
480b0c5b | 2691 | |
f249a012 | 2692 | if (winsock_lib == NULL) |
480b0c5b GV |
2693 | { |
2694 | h_errno = ENETDOWN; | |
2695 | return INVALID_SOCKET; | |
2696 | } | |
2697 | ||
2698 | check_errno (); | |
2699 | ||
2700 | /* call the real socket function */ | |
962955c5 | 2701 | s = pfn_socket (af, type, protocol); |
480b0c5b GV |
2702 | |
2703 | if (s != INVALID_SOCKET) | |
962955c5 | 2704 | return socket_to_fd (s); |
480b0c5b | 2705 | |
962955c5 JR |
2706 | set_errno (); |
2707 | return -1; | |
2708 | } | |
2709 | ||
2710 | /* Convert a SOCKET to a file descriptor. */ | |
2711 | int | |
2712 | socket_to_fd (SOCKET s) | |
2713 | { | |
2714 | int fd; | |
2715 | child_process * cp; | |
2716 | ||
2717 | /* Although under NT 3.5 _open_osfhandle will accept a socket | |
2718 | handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT, | |
2719 | that does not work under NT 3.1. However, we can get the same | |
2720 | effect by using a backdoor function to replace an existing | |
2721 | descriptor handle with the one we want. */ | |
2722 | ||
2723 | /* allocate a file descriptor (with appropriate flags) */ | |
2724 | fd = _open ("NUL:", _O_RDWR); | |
2725 | if (fd >= 0) | |
2726 | { | |
480b0c5b | 2727 | #ifdef SOCK_REPLACE_HANDLE |
962955c5 JR |
2728 | /* now replace handle to NUL with our socket handle */ |
2729 | CloseHandle ((HANDLE) _get_osfhandle (fd)); | |
2730 | _free_osfhnd (fd); | |
2731 | _set_osfhnd (fd, s); | |
2732 | /* setmode (fd, _O_BINARY); */ | |
480b0c5b | 2733 | #else |
962955c5 JR |
2734 | /* Make a non-inheritable copy of the socket handle. Note |
2735 | that it is possible that sockets aren't actually kernel | |
2736 | handles, which appears to be the case on Windows 9x when | |
2737 | the MS Proxy winsock client is installed. */ | |
2738 | { | |
2739 | /* Apparently there is a bug in NT 3.51 with some service | |
2740 | packs, which prevents using DuplicateHandle to make a | |
2741 | socket handle non-inheritable (causes WSACleanup to | |
2742 | hang). The work-around is to use SetHandleInformation | |
2743 | instead if it is available and implemented. */ | |
2744 | if (pfn_SetHandleInformation) | |
480b0c5b | 2745 | { |
962955c5 JR |
2746 | pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0); |
2747 | } | |
2748 | else | |
2749 | { | |
2750 | HANDLE parent = GetCurrentProcess (); | |
2751 | HANDLE new_s = INVALID_HANDLE_VALUE; | |
2752 | ||
2753 | if (DuplicateHandle (parent, | |
2754 | (HANDLE) s, | |
2755 | parent, | |
2756 | &new_s, | |
2757 | 0, | |
2758 | FALSE, | |
2759 | DUPLICATE_SAME_ACCESS)) | |
f1614061 | 2760 | { |
962955c5 JR |
2761 | /* It is possible that DuplicateHandle succeeds even |
2762 | though the socket wasn't really a kernel handle, | |
2763 | because a real handle has the same value. So | |
2764 | test whether the new handle really is a socket. */ | |
2765 | long nonblocking = 0; | |
2766 | if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0) | |
ca149beb | 2767 | { |
962955c5 JR |
2768 | pfn_closesocket (s); |
2769 | s = (SOCKET) new_s; | |
2770 | } | |
2771 | else | |
2772 | { | |
2773 | CloseHandle (new_s); | |
2774 | } | |
2775 | } | |
480b0c5b | 2776 | } |
962955c5 JR |
2777 | } |
2778 | fd_info[fd].hnd = (HANDLE) s; | |
480b0c5b GV |
2779 | #endif |
2780 | ||
962955c5 JR |
2781 | /* set our own internal flags */ |
2782 | fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE; | |
480b0c5b | 2783 | |
962955c5 JR |
2784 | cp = new_child (); |
2785 | if (cp) | |
2786 | { | |
2787 | cp->fd = fd; | |
2788 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
480b0c5b | 2789 | |
962955c5 JR |
2790 | /* attach child_process to fd_info */ |
2791 | if (fd_info[ fd ].cp != NULL) | |
2792 | { | |
2793 | DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd)); | |
2794 | abort (); | |
480b0c5b GV |
2795 | } |
2796 | ||
962955c5 JR |
2797 | fd_info[ fd ].cp = cp; |
2798 | ||
2799 | /* success! */ | |
2800 | winsock_inuse++; /* count open sockets */ | |
2801 | return fd; | |
480b0c5b | 2802 | } |
480b0c5b | 2803 | |
962955c5 JR |
2804 | /* clean up */ |
2805 | _close (fd); | |
2806 | } | |
2807 | pfn_closesocket (s); | |
2808 | h_errno = EMFILE; | |
480b0c5b GV |
2809 | return -1; |
2810 | } | |
2811 | ||
2812 | ||
2813 | int | |
2814 | sys_bind (int s, const struct sockaddr * addr, int namelen) | |
2815 | { | |
f249a012 | 2816 | if (winsock_lib == NULL) |
480b0c5b GV |
2817 | { |
2818 | h_errno = ENOTSOCK; | |
2819 | return SOCKET_ERROR; | |
2820 | } | |
2821 | ||
2822 | check_errno (); | |
2823 | if (fd_info[s].flags & FILE_SOCKET) | |
2824 | { | |
2825 | int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen); | |
2826 | if (rc == SOCKET_ERROR) | |
2827 | set_errno (); | |
2828 | return rc; | |
2829 | } | |
2830 | h_errno = ENOTSOCK; | |
2831 | return SOCKET_ERROR; | |
2832 | } | |
2833 | ||
2834 | ||
2835 | int | |
2836 | sys_connect (int s, const struct sockaddr * name, int namelen) | |
2837 | { | |
f249a012 | 2838 | if (winsock_lib == NULL) |
480b0c5b GV |
2839 | { |
2840 | h_errno = ENOTSOCK; | |
2841 | return SOCKET_ERROR; | |
2842 | } | |
2843 | ||
2844 | check_errno (); | |
2845 | if (fd_info[s].flags & FILE_SOCKET) | |
2846 | { | |
2847 | int rc = pfn_connect (SOCK_HANDLE (s), name, namelen); | |
2848 | if (rc == SOCKET_ERROR) | |
2849 | set_errno (); | |
2850 | return rc; | |
2851 | } | |
2852 | h_errno = ENOTSOCK; | |
2853 | return SOCKET_ERROR; | |
2854 | } | |
2855 | ||
2856 | u_short | |
2857 | sys_htons (u_short hostshort) | |
2858 | { | |
f249a012 | 2859 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2860 | pfn_htons (hostshort) : hostshort; |
2861 | } | |
2862 | ||
2863 | u_short | |
2864 | sys_ntohs (u_short netshort) | |
2865 | { | |
f249a012 | 2866 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2867 | pfn_ntohs (netshort) : netshort; |
2868 | } | |
2869 | ||
2870 | unsigned long | |
2871 | sys_inet_addr (const char * cp) | |
2872 | { | |
f249a012 | 2873 | return (winsock_lib != NULL) ? |
480b0c5b GV |
2874 | pfn_inet_addr (cp) : INADDR_NONE; |
2875 | } | |
2876 | ||
2877 | int | |
2878 | sys_gethostname (char * name, int namelen) | |
2879 | { | |
f249a012 | 2880 | if (winsock_lib != NULL) |
480b0c5b GV |
2881 | return pfn_gethostname (name, namelen); |
2882 | ||
2883 | if (namelen > MAX_COMPUTERNAME_LENGTH) | |
a302c7ae | 2884 | return !GetComputerName (name, (DWORD *)&namelen); |
480b0c5b GV |
2885 | |
2886 | h_errno = EFAULT; | |
2887 | return SOCKET_ERROR; | |
2888 | } | |
2889 | ||
2890 | struct hostent * | |
2891 | sys_gethostbyname(const char * name) | |
2892 | { | |
2893 | struct hostent * host; | |
2894 | ||
f249a012 | 2895 | if (winsock_lib == NULL) |
480b0c5b GV |
2896 | { |
2897 | h_errno = ENETDOWN; | |
2898 | return NULL; | |
2899 | } | |
2900 | ||
2901 | check_errno (); | |
2902 | host = pfn_gethostbyname (name); | |
2903 | if (!host) | |
2904 | set_errno (); | |
2905 | return host; | |
2906 | } | |
2907 | ||
2908 | struct servent * | |
2909 | sys_getservbyname(const char * name, const char * proto) | |
2910 | { | |
2911 | struct servent * serv; | |
2912 | ||
f249a012 | 2913 | if (winsock_lib == NULL) |
480b0c5b GV |
2914 | { |
2915 | h_errno = ENETDOWN; | |
2916 | return NULL; | |
2917 | } | |
2918 | ||
2919 | check_errno (); | |
2920 | serv = pfn_getservbyname (name, proto); | |
2921 | if (!serv) | |
2922 | set_errno (); | |
2923 | return serv; | |
2924 | } | |
2925 | ||
ecd270eb JR |
2926 | int |
2927 | sys_getpeername (int s, struct sockaddr *addr, int * namelen) | |
2928 | { | |
2929 | if (winsock_lib == NULL) | |
2930 | { | |
2931 | h_errno = ENETDOWN; | |
2932 | return SOCKET_ERROR; | |
2933 | } | |
2934 | ||
2935 | check_errno (); | |
2936 | if (fd_info[s].flags & FILE_SOCKET) | |
2937 | { | |
2938 | int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen); | |
2939 | if (rc == SOCKET_ERROR) | |
2940 | set_errno (); | |
2941 | return rc; | |
2942 | } | |
2943 | h_errno = ENOTSOCK; | |
2944 | return SOCKET_ERROR; | |
2945 | } | |
2946 | ||
2947 | ||
380961a6 GV |
2948 | int |
2949 | sys_shutdown (int s, int how) | |
2950 | { | |
380961a6 GV |
2951 | if (winsock_lib == NULL) |
2952 | { | |
2953 | h_errno = ENETDOWN; | |
2954 | return SOCKET_ERROR; | |
2955 | } | |
2956 | ||
2957 | check_errno (); | |
2958 | if (fd_info[s].flags & FILE_SOCKET) | |
2959 | { | |
2960 | int rc = pfn_shutdown (SOCK_HANDLE (s), how); | |
962955c5 JR |
2961 | if (rc == SOCKET_ERROR) |
2962 | set_errno (); | |
2963 | return rc; | |
2964 | } | |
2965 | h_errno = ENOTSOCK; | |
2966 | return SOCKET_ERROR; | |
2967 | } | |
2968 | ||
2969 | int | |
2970 | sys_setsockopt (int s, int level, int optname, const char * optval, int optlen) | |
2971 | { | |
2972 | if (winsock_lib == NULL) | |
2973 | { | |
2974 | h_errno = ENETDOWN; | |
2975 | return SOCKET_ERROR; | |
2976 | } | |
2977 | ||
2978 | check_errno (); | |
2979 | if (fd_info[s].flags & FILE_SOCKET) | |
2980 | { | |
2981 | int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname, | |
2982 | optval, optlen); | |
2983 | if (rc == SOCKET_ERROR) | |
2984 | set_errno (); | |
2985 | return rc; | |
2986 | } | |
2987 | h_errno = ENOTSOCK; | |
2988 | return SOCKET_ERROR; | |
2989 | } | |
2990 | ||
2991 | int | |
2992 | sys_listen (int s, int backlog) | |
2993 | { | |
2994 | if (winsock_lib == NULL) | |
2995 | { | |
2996 | h_errno = ENETDOWN; | |
2997 | return SOCKET_ERROR; | |
2998 | } | |
2999 | ||
3000 | check_errno (); | |
3001 | if (fd_info[s].flags & FILE_SOCKET) | |
3002 | { | |
3003 | int rc = pfn_listen (SOCK_HANDLE (s), backlog); | |
3004 | if (rc == SOCKET_ERROR) | |
3005 | set_errno (); | |
3006 | return rc; | |
3007 | } | |
3008 | h_errno = ENOTSOCK; | |
3009 | return SOCKET_ERROR; | |
3010 | } | |
3011 | ||
3012 | int | |
3013 | sys_getsockname (int s, struct sockaddr * name, int * namelen) | |
3014 | { | |
3015 | if (winsock_lib == NULL) | |
3016 | { | |
3017 | h_errno = ENETDOWN; | |
3018 | return SOCKET_ERROR; | |
3019 | } | |
3020 | ||
3021 | check_errno (); | |
3022 | if (fd_info[s].flags & FILE_SOCKET) | |
3023 | { | |
3024 | int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen); | |
3025 | if (rc == SOCKET_ERROR) | |
3026 | set_errno (); | |
3027 | return rc; | |
3028 | } | |
3029 | h_errno = ENOTSOCK; | |
3030 | return SOCKET_ERROR; | |
3031 | } | |
3032 | ||
3033 | int | |
3034 | sys_accept (int s, struct sockaddr * addr, int * addrlen) | |
3035 | { | |
3036 | if (winsock_lib == NULL) | |
3037 | { | |
3038 | h_errno = ENETDOWN; | |
3039 | return -1; | |
3040 | } | |
3041 | ||
3042 | check_errno (); | |
3043 | if (fd_info[s].flags & FILE_SOCKET) | |
3044 | { | |
a0ad1860 JB |
3045 | SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen); |
3046 | if (t != INVALID_SOCKET) | |
3047 | return socket_to_fd (t); | |
962955c5 JR |
3048 | |
3049 | set_errno (); | |
3050 | return -1; | |
3051 | } | |
3052 | h_errno = ENOTSOCK; | |
3053 | return -1; | |
3054 | } | |
3055 | ||
3056 | int | |
3057 | sys_recvfrom (int s, char * buf, int len, int flags, | |
3058 | struct sockaddr * from, int * fromlen) | |
3059 | { | |
3060 | if (winsock_lib == NULL) | |
3061 | { | |
3062 | h_errno = ENETDOWN; | |
3063 | return SOCKET_ERROR; | |
3064 | } | |
3065 | ||
3066 | check_errno (); | |
3067 | if (fd_info[s].flags & FILE_SOCKET) | |
3068 | { | |
3069 | int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen); | |
3070 | if (rc == SOCKET_ERROR) | |
3071 | set_errno (); | |
3072 | return rc; | |
3073 | } | |
3074 | h_errno = ENOTSOCK; | |
3075 | return SOCKET_ERROR; | |
3076 | } | |
3077 | ||
3078 | int | |
3079 | sys_sendto (int s, const char * buf, int len, int flags, | |
3080 | const struct sockaddr * to, int tolen) | |
3081 | { | |
3082 | if (winsock_lib == NULL) | |
3083 | { | |
3084 | h_errno = ENETDOWN; | |
3085 | return SOCKET_ERROR; | |
3086 | } | |
3087 | ||
3088 | check_errno (); | |
3089 | if (fd_info[s].flags & FILE_SOCKET) | |
3090 | { | |
3091 | int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen); | |
380961a6 GV |
3092 | if (rc == SOCKET_ERROR) |
3093 | set_errno (); | |
3094 | return rc; | |
3095 | } | |
3096 | h_errno = ENOTSOCK; | |
3097 | return SOCKET_ERROR; | |
3098 | } | |
3099 | ||
ecd270eb JR |
3100 | /* Windows does not have an fcntl function. Provide an implementation |
3101 | solely for making sockets non-blocking. */ | |
3102 | int | |
3103 | fcntl (int s, int cmd, int options) | |
3104 | { | |
3105 | if (winsock_lib == NULL) | |
3106 | { | |
3107 | h_errno = ENETDOWN; | |
3108 | return -1; | |
3109 | } | |
3110 | ||
3111 | check_errno (); | |
3112 | if (fd_info[s].flags & FILE_SOCKET) | |
3113 | { | |
3114 | if (cmd == F_SETFL && options == O_NDELAY) | |
3115 | { | |
3116 | unsigned long nblock = 1; | |
3117 | int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock); | |
3118 | if (rc == SOCKET_ERROR) | |
3119 | set_errno(); | |
3120 | /* Keep track of the fact that we set this to non-blocking. */ | |
3121 | fd_info[s].flags |= FILE_NDELAY; | |
3122 | return rc; | |
3123 | } | |
3124 | else | |
3125 | { | |
3126 | h_errno = EINVAL; | |
3127 | return SOCKET_ERROR; | |
3128 | } | |
3129 | } | |
3130 | h_errno = ENOTSOCK; | |
3131 | return SOCKET_ERROR; | |
3132 | } | |
3133 | ||
480b0c5b GV |
3134 | #endif /* HAVE_SOCKETS */ |
3135 | ||
3136 | ||
3137 | /* Shadow main io functions: we need to handle pipes and sockets more | |
3138 | intelligently, and implement non-blocking mode as well. */ | |
3139 | ||
3140 | int | |
3141 | sys_close (int fd) | |
3142 | { | |
3143 | int rc; | |
3144 | ||
3145 | if (fd < 0 || fd >= MAXDESC) | |
3146 | { | |
3147 | errno = EBADF; | |
3148 | return -1; | |
3149 | } | |
3150 | ||
3151 | if (fd_info[fd].cp) | |
3152 | { | |
3153 | child_process * cp = fd_info[fd].cp; | |
3154 | ||
3155 | fd_info[fd].cp = NULL; | |
3156 | ||
3157 | if (CHILD_ACTIVE (cp)) | |
3158 | { | |
3159 | /* if last descriptor to active child_process then cleanup */ | |
3160 | int i; | |
3161 | for (i = 0; i < MAXDESC; i++) | |
3162 | { | |
3163 | if (i == fd) | |
3164 | continue; | |
3165 | if (fd_info[i].cp == cp) | |
3166 | break; | |
3167 | } | |
3168 | if (i == MAXDESC) | |
3169 | { | |
f249a012 | 3170 | #ifdef HAVE_SOCKETS |
480b0c5b GV |
3171 | if (fd_info[fd].flags & FILE_SOCKET) |
3172 | { | |
f249a012 RS |
3173 | #ifndef SOCK_REPLACE_HANDLE |
3174 | if (winsock_lib == NULL) abort (); | |
480b0c5b GV |
3175 | |
3176 | pfn_shutdown (SOCK_HANDLE (fd), 2); | |
3177 | rc = pfn_closesocket (SOCK_HANDLE (fd)); | |
f249a012 RS |
3178 | #endif |
3179 | winsock_inuse--; /* count open sockets */ | |
480b0c5b GV |
3180 | } |
3181 | #endif | |
3182 | delete_child (cp); | |
3183 | } | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | /* Note that sockets do not need special treatment here (at least on | |
e9e23e23 | 3188 | NT and Windows 95 using the standard tcp/ip stacks) - it appears that |
480b0c5b GV |
3189 | closesocket is equivalent to CloseHandle, which is to be expected |
3190 | because socket handles are fully fledged kernel handles. */ | |
3191 | rc = _close (fd); | |
3192 | ||
3193 | if (rc == 0) | |
3194 | fd_info[fd].flags = 0; | |
3195 | ||
3196 | return rc; | |
3197 | } | |
3198 | ||
3199 | int | |
3200 | sys_dup (int fd) | |
3201 | { | |
3202 | int new_fd; | |
3203 | ||
3204 | new_fd = _dup (fd); | |
3205 | if (new_fd >= 0) | |
3206 | { | |
3207 | /* duplicate our internal info as well */ | |
3208 | fd_info[new_fd] = fd_info[fd]; | |
3209 | } | |
3210 | return new_fd; | |
3211 | } | |
3212 | ||
3213 | ||
3214 | int | |
3215 | sys_dup2 (int src, int dst) | |
3216 | { | |
3217 | int rc; | |
3218 | ||
3219 | if (dst < 0 || dst >= MAXDESC) | |
3220 | { | |
3221 | errno = EBADF; | |
3222 | return -1; | |
3223 | } | |
3224 | ||
3225 | /* make sure we close the destination first if it's a pipe or socket */ | |
3226 | if (src != dst && fd_info[dst].flags != 0) | |
3227 | sys_close (dst); | |
3228 | ||
3229 | rc = _dup2 (src, dst); | |
3230 | if (rc == 0) | |
3231 | { | |
3232 | /* duplicate our internal info as well */ | |
3233 | fd_info[dst] = fd_info[src]; | |
3234 | } | |
3235 | return rc; | |
3236 | } | |
3237 | ||
480b0c5b GV |
3238 | /* Unix pipe() has only one arg */ |
3239 | int | |
3240 | sys_pipe (int * phandles) | |
3241 | { | |
3242 | int rc; | |
3243 | unsigned flags; | |
480b0c5b | 3244 | |
76b3903d GV |
3245 | /* make pipe handles non-inheritable; when we spawn a child, we |
3246 | replace the relevant handle with an inheritable one. Also put | |
3247 | pipes into binary mode; we will do text mode translation ourselves | |
3248 | if required. */ | |
3249 | rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY); | |
480b0c5b GV |
3250 | |
3251 | if (rc == 0) | |
3252 | { | |
7664e306 | 3253 | flags = FILE_PIPE | FILE_READ | FILE_BINARY; |
480b0c5b GV |
3254 | fd_info[phandles[0]].flags = flags; |
3255 | ||
7664e306 | 3256 | flags = FILE_PIPE | FILE_WRITE | FILE_BINARY; |
480b0c5b GV |
3257 | fd_info[phandles[1]].flags = flags; |
3258 | } | |
3259 | ||
3260 | return rc; | |
3261 | } | |
3262 | ||
f7554349 | 3263 | /* From ntproc.c */ |
fbd6baed | 3264 | extern Lisp_Object Vw32_pipe_read_delay; |
f7554349 | 3265 | |
480b0c5b GV |
3266 | /* Function to do blocking read of one byte, needed to implement |
3267 | select. It is only allowed on sockets and pipes. */ | |
3268 | int | |
3269 | _sys_read_ahead (int fd) | |
3270 | { | |
3271 | child_process * cp; | |
3272 | int rc; | |
3273 | ||
3274 | if (fd < 0 || fd >= MAXDESC) | |
3275 | return STATUS_READ_ERROR; | |
3276 | ||
3277 | cp = fd_info[fd].cp; | |
3278 | ||
3279 | if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY) | |
3280 | return STATUS_READ_ERROR; | |
3281 | ||
3282 | if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0 | |
3283 | || (fd_info[fd].flags & FILE_READ) == 0) | |
3284 | { | |
3285 | DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe or socket!\n", fd)); | |
3286 | abort (); | |
3287 | } | |
3288 | ||
3289 | cp->status = STATUS_READ_IN_PROGRESS; | |
3290 | ||
3291 | if (fd_info[fd].flags & FILE_PIPE) | |
f7554349 | 3292 | { |
f7554349 KH |
3293 | rc = _read (fd, &cp->chr, sizeof (char)); |
3294 | ||
3295 | /* Give subprocess time to buffer some more output for us before | |
e9e23e23 | 3296 | reporting that input is available; we need this because Windows 95 |
f7554349 KH |
3297 | connects DOS programs to pipes by making the pipe appear to be |
3298 | the normal console stdout - as a result most DOS programs will | |
3299 | write to stdout without buffering, ie. one character at a | |
fbd6baed | 3300 | time. Even some W32 programs do this - "dir" in a command |
f7554349 KH |
3301 | shell on NT is very slow if we don't do this. */ |
3302 | if (rc > 0) | |
3303 | { | |
fbd6baed | 3304 | int wait = XINT (Vw32_pipe_read_delay); |
f7554349 KH |
3305 | |
3306 | if (wait > 0) | |
3307 | Sleep (wait); | |
3308 | else if (wait < 0) | |
3309 | while (++wait <= 0) | |
3310 | /* Yield remainder of our time slice, effectively giving a | |
3311 | temporary priority boost to the child process. */ | |
3312 | Sleep (0); | |
3313 | } | |
3314 | } | |
480b0c5b GV |
3315 | #ifdef HAVE_SOCKETS |
3316 | else if (fd_info[fd].flags & FILE_SOCKET) | |
ecd270eb JR |
3317 | { |
3318 | unsigned long nblock = 0; | |
3319 | /* We always want this to block, so temporarily disable NDELAY. */ | |
3320 | if (fd_info[fd].flags & FILE_NDELAY) | |
3321 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); | |
3322 | ||
3323 | rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0); | |
3324 | ||
3325 | if (fd_info[fd].flags & FILE_NDELAY) | |
3326 | { | |
3327 | nblock = 1; | |
3328 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock); | |
3329 | } | |
3330 | } | |
480b0c5b GV |
3331 | #endif |
3332 | ||
3333 | if (rc == sizeof (char)) | |
3334 | cp->status = STATUS_READ_SUCCEEDED; | |
3335 | else | |
3336 | cp->status = STATUS_READ_FAILED; | |
3337 | ||
3338 | return cp->status; | |
3339 | } | |
3340 | ||
3341 | int | |
3342 | sys_read (int fd, char * buffer, unsigned int count) | |
3343 | { | |
3344 | int nchars; | |
480b0c5b GV |
3345 | int to_read; |
3346 | DWORD waiting; | |
76b3903d | 3347 | char * orig_buffer = buffer; |
480b0c5b GV |
3348 | |
3349 | if (fd < 0 || fd >= MAXDESC) | |
3350 | { | |
3351 | errno = EBADF; | |
3352 | return -1; | |
3353 | } | |
3354 | ||
3355 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
3356 | { | |
3357 | child_process *cp = fd_info[fd].cp; | |
3358 | ||
3359 | if ((fd_info[fd].flags & FILE_READ) == 0) | |
3360 | { | |
3361 | errno = EBADF; | |
3362 | return -1; | |
3363 | } | |
3364 | ||
76b3903d GV |
3365 | nchars = 0; |
3366 | ||
3367 | /* re-read CR carried over from last read */ | |
3368 | if (fd_info[fd].flags & FILE_LAST_CR) | |
3369 | { | |
3370 | if (fd_info[fd].flags & FILE_BINARY) abort (); | |
3371 | *buffer++ = 0x0d; | |
3372 | count--; | |
3373 | nchars++; | |
f52eb3ef | 3374 | fd_info[fd].flags &= ~FILE_LAST_CR; |
76b3903d GV |
3375 | } |
3376 | ||
480b0c5b GV |
3377 | /* presence of a child_process structure means we are operating in |
3378 | non-blocking mode - otherwise we just call _read directly. | |
3379 | Note that the child_process structure might be missing because | |
3380 | reap_subprocess has been called; in this case the pipe is | |
3381 | already broken, so calling _read on it is okay. */ | |
3382 | if (cp) | |
3383 | { | |
3384 | int current_status = cp->status; | |
3385 | ||
3386 | switch (current_status) | |
3387 | { | |
3388 | case STATUS_READ_FAILED: | |
3389 | case STATUS_READ_ERROR: | |
f52eb3ef GV |
3390 | /* report normal EOF if nothing in buffer */ |
3391 | if (nchars <= 0) | |
3392 | fd_info[fd].flags |= FILE_AT_EOF; | |
3393 | return nchars; | |
480b0c5b GV |
3394 | |
3395 | case STATUS_READ_READY: | |
3396 | case STATUS_READ_IN_PROGRESS: | |
3397 | DebPrint (("sys_read called when read is in progress\n")); | |
3398 | errno = EWOULDBLOCK; | |
3399 | return -1; | |
3400 | ||
3401 | case STATUS_READ_SUCCEEDED: | |
3402 | /* consume read-ahead char */ | |
3403 | *buffer++ = cp->chr; | |
3404 | count--; | |
76b3903d | 3405 | nchars++; |
480b0c5b GV |
3406 | cp->status = STATUS_READ_ACKNOWLEDGED; |
3407 | ResetEvent (cp->char_avail); | |
3408 | ||
3409 | case STATUS_READ_ACKNOWLEDGED: | |
3410 | break; | |
3411 | ||
3412 | default: | |
3413 | DebPrint (("sys_read: bad status %d\n", current_status)); | |
3414 | errno = EBADF; | |
3415 | return -1; | |
3416 | } | |
3417 | ||
3418 | if (fd_info[fd].flags & FILE_PIPE) | |
3419 | { | |
3420 | PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL); | |
3421 | to_read = min (waiting, (DWORD) count); | |
f52eb3ef GV |
3422 | |
3423 | if (to_read > 0) | |
3424 | nchars += _read (fd, buffer, to_read); | |
480b0c5b GV |
3425 | } |
3426 | #ifdef HAVE_SOCKETS | |
3427 | else /* FILE_SOCKET */ | |
3428 | { | |
f249a012 | 3429 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3430 | |
3431 | /* do the equivalent of a non-blocking read */ | |
3432 | pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting); | |
76b3903d | 3433 | if (waiting == 0 && nchars == 0) |
480b0c5b GV |
3434 | { |
3435 | h_errno = errno = EWOULDBLOCK; | |
3436 | return -1; | |
3437 | } | |
3438 | ||
480b0c5b GV |
3439 | if (waiting) |
3440 | { | |
3441 | /* always use binary mode for sockets */ | |
76b3903d GV |
3442 | int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0); |
3443 | if (res == SOCKET_ERROR) | |
480b0c5b GV |
3444 | { |
3445 | DebPrint(("sys_read.recv failed with error %d on socket %ld\n", | |
3446 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
76b3903d GV |
3447 | set_errno (); |
3448 | return -1; | |
480b0c5b | 3449 | } |
76b3903d | 3450 | nchars += res; |
480b0c5b GV |
3451 | } |
3452 | } | |
3453 | #endif | |
3454 | } | |
3455 | else | |
f52eb3ef GV |
3456 | { |
3457 | int nread = _read (fd, buffer, count); | |
3458 | if (nread >= 0) | |
3459 | nchars += nread; | |
3460 | else if (nchars == 0) | |
3461 | nchars = nread; | |
3462 | } | |
76b3903d | 3463 | |
f52eb3ef GV |
3464 | if (nchars <= 0) |
3465 | fd_info[fd].flags |= FILE_AT_EOF; | |
76b3903d | 3466 | /* Perform text mode translation if required. */ |
f52eb3ef | 3467 | else if ((fd_info[fd].flags & FILE_BINARY) == 0) |
76b3903d GV |
3468 | { |
3469 | nchars = crlf_to_lf (nchars, orig_buffer); | |
3470 | /* If buffer contains only CR, return that. To be absolutely | |
3471 | sure we should attempt to read the next char, but in | |
3472 | practice a CR to be followed by LF would not appear by | |
3473 | itself in the buffer. */ | |
3474 | if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d) | |
3475 | { | |
3476 | fd_info[fd].flags |= FILE_LAST_CR; | |
3477 | nchars--; | |
3478 | } | |
76b3903d | 3479 | } |
480b0c5b GV |
3480 | } |
3481 | else | |
3482 | nchars = _read (fd, buffer, count); | |
3483 | ||
76b3903d | 3484 | return nchars; |
480b0c5b GV |
3485 | } |
3486 | ||
3487 | /* For now, don't bother with a non-blocking mode */ | |
3488 | int | |
3489 | sys_write (int fd, const void * buffer, unsigned int count) | |
3490 | { | |
3491 | int nchars; | |
3492 | ||
3493 | if (fd < 0 || fd >= MAXDESC) | |
3494 | { | |
3495 | errno = EBADF; | |
3496 | return -1; | |
3497 | } | |
3498 | ||
3499 | if (fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) | |
76b3903d GV |
3500 | { |
3501 | if ((fd_info[fd].flags & FILE_WRITE) == 0) | |
3502 | { | |
3503 | errno = EBADF; | |
3504 | return -1; | |
3505 | } | |
3506 | ||
3507 | /* Perform text mode translation if required. */ | |
3508 | if ((fd_info[fd].flags & FILE_BINARY) == 0) | |
3509 | { | |
3510 | char * tmpbuf = alloca (count * 2); | |
3511 | unsigned char * src = (void *)buffer; | |
3512 | unsigned char * dst = tmpbuf; | |
3513 | int nbytes = count; | |
3514 | ||
3515 | while (1) | |
3516 | { | |
3517 | unsigned char *next; | |
3518 | /* copy next line or remaining bytes */ | |
3519 | next = _memccpy (dst, src, '\n', nbytes); | |
3520 | if (next) | |
3521 | { | |
3522 | /* copied one line ending with '\n' */ | |
3523 | int copied = next - dst; | |
3524 | nbytes -= copied; | |
3525 | src += copied; | |
3526 | /* insert '\r' before '\n' */ | |
3527 | next[-1] = '\r'; | |
3528 | next[0] = '\n'; | |
3529 | dst = next + 1; | |
3530 | count++; | |
3531 | } | |
3532 | else | |
3533 | /* copied remaining partial line -> now finished */ | |
3534 | break; | |
3535 | } | |
3536 | buffer = tmpbuf; | |
3537 | } | |
3538 | } | |
3539 | ||
480b0c5b GV |
3540 | #ifdef HAVE_SOCKETS |
3541 | if (fd_info[fd].flags & FILE_SOCKET) | |
3542 | { | |
f249a012 | 3543 | if (winsock_lib == NULL) abort (); |
480b0c5b GV |
3544 | nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0); |
3545 | if (nchars == SOCKET_ERROR) | |
3546 | { | |
3547 | DebPrint(("sys_read.send failed with error %d on socket %ld\n", | |
3548 | pfn_WSAGetLastError (), SOCK_HANDLE (fd))); | |
3549 | set_errno (); | |
3550 | } | |
3551 | } | |
3552 | else | |
3553 | #endif | |
3554 | nchars = _write (fd, buffer, count); | |
3555 | ||
3556 | return nchars; | |
3557 | } | |
3558 | ||
f52eb3ef GV |
3559 | static void |
3560 | check_windows_init_file () | |
3561 | { | |
3562 | extern int noninteractive, inhibit_window_system; | |
3563 | ||
3564 | /* A common indication that Emacs is not installed properly is when | |
3565 | it cannot find the Windows installation file. If this file does | |
3566 | not exist in the expected place, tell the user. */ | |
3567 | ||
d54abccd GV |
3568 | if (!noninteractive && !inhibit_window_system) |
3569 | { | |
3570 | extern Lisp_Object Vwindow_system, Vload_path, Qfile_exists_p; | |
a0b9c838 | 3571 | Lisp_Object objs[2]; |
96ef7d42 | 3572 | Lisp_Object full_load_path; |
d54abccd GV |
3573 | Lisp_Object init_file; |
3574 | int fd; | |
f52eb3ef | 3575 | |
a0b9c838 GV |
3576 | objs[0] = Vload_path; |
3577 | objs[1] = decode_env_path (0, (getenv ("EMACSLOADPATH"))); | |
3578 | full_load_path = Fappend (2, objs); | |
d54abccd | 3579 | init_file = build_string ("term/w32-win"); |
7d032932 | 3580 | fd = openp (full_load_path, init_file, Vload_suffixes, NULL, Qnil); |
d54abccd GV |
3581 | if (fd < 0) |
3582 | { | |
96ef7d42 | 3583 | Lisp_Object load_path_print = Fprin1_to_string (full_load_path, Qnil); |
d54abccd GV |
3584 | char *init_file_name = XSTRING (init_file)->data; |
3585 | char *load_path = XSTRING (load_path_print)->data; | |
3586 | char *buffer = alloca (1024); | |
3587 | ||
3588 | sprintf (buffer, | |
3589 | "The Emacs Windows initialization file \"%s.el\" " | |
3590 | "could not be found in your Emacs installation. " | |
3591 | "Emacs checked the following directories for this file:\n" | |
3592 | "\n%s\n\n" | |
3593 | "When Emacs cannot find this file, it usually means that it " | |
3594 | "was not installed properly, or its distribution file was " | |
3595 | "not unpacked properly.\nSee the README.W32 file in the " | |
3596 | "top-level Emacs directory for more information.", | |
3597 | init_file_name, load_path); | |
3598 | MessageBox (NULL, | |
3599 | buffer, | |
3600 | "Emacs Abort Dialog", | |
3601 | MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL); | |
f52eb3ef GV |
3602 | /* Use the low-level Emacs abort. */ |
3603 | #undef abort | |
d54abccd GV |
3604 | abort (); |
3605 | } | |
3606 | else | |
3607 | { | |
a302c7ae | 3608 | _close (fd); |
d54abccd | 3609 | } |
f52eb3ef | 3610 | } |
f52eb3ef | 3611 | } |
480b0c5b GV |
3612 | |
3613 | void | |
3614 | term_ntproc () | |
3615 | { | |
3616 | #ifdef HAVE_SOCKETS | |
3617 | /* shutdown the socket interface if necessary */ | |
3618 | term_winsock (); | |
3619 | #endif | |
3620 | } | |
3621 | ||
3622 | void | |
3623 | init_ntproc () | |
3624 | { | |
3625 | #ifdef HAVE_SOCKETS | |
f249a012 RS |
3626 | /* Initialise the socket interface now if available and requested by |
3627 | the user by defining PRELOAD_WINSOCK; otherwise loading will be | |
fbd6baed | 3628 | delayed until open-network-stream is called (w32-has-winsock can |
f249a012 RS |
3629 | also be used to dynamically load or reload winsock). |
3630 | ||
3631 | Conveniently, init_environment is called before us, so | |
3632 | PRELOAD_WINSOCK can be set in the registry. */ | |
3633 | ||
3634 | /* Always initialize this correctly. */ | |
3635 | winsock_lib = NULL; | |
3636 | ||
3637 | if (getenv ("PRELOAD_WINSOCK") != NULL) | |
3638 | init_winsock (TRUE); | |
480b0c5b GV |
3639 | #endif |
3640 | ||
3641 | /* Initial preparation for subprocess support: replace our standard | |
3642 | handles with non-inheritable versions. */ | |
3643 | { | |
3644 | HANDLE parent; | |
3645 | HANDLE stdin_save = INVALID_HANDLE_VALUE; | |
3646 | HANDLE stdout_save = INVALID_HANDLE_VALUE; | |
3647 | HANDLE stderr_save = INVALID_HANDLE_VALUE; | |
3648 | ||
3649 | parent = GetCurrentProcess (); | |
3650 | ||
3651 | /* ignore errors when duplicating and closing; typically the | |
3652 | handles will be invalid when running as a gui program. */ | |
3653 | DuplicateHandle (parent, | |
3654 | GetStdHandle (STD_INPUT_HANDLE), | |
3655 | parent, | |
3656 | &stdin_save, | |
3657 | 0, | |
3658 | FALSE, | |
3659 | DUPLICATE_SAME_ACCESS); | |
3660 | ||
3661 | DuplicateHandle (parent, | |
3662 | GetStdHandle (STD_OUTPUT_HANDLE), | |
3663 | parent, | |
3664 | &stdout_save, | |
3665 | 0, | |
3666 | FALSE, | |
3667 | DUPLICATE_SAME_ACCESS); | |
3668 | ||
3669 | DuplicateHandle (parent, | |
3670 | GetStdHandle (STD_ERROR_HANDLE), | |
3671 | parent, | |
3672 | &stderr_save, | |
3673 | 0, | |
3674 | FALSE, | |
3675 | DUPLICATE_SAME_ACCESS); | |
3676 | ||
3677 | fclose (stdin); | |
3678 | fclose (stdout); | |
3679 | fclose (stderr); | |
3680 | ||
3681 | if (stdin_save != INVALID_HANDLE_VALUE) | |
3682 | _open_osfhandle ((long) stdin_save, O_TEXT); | |
3683 | else | |
76b3903d GV |
3684 | _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY); |
3685 | _fdopen (0, "r"); | |
480b0c5b GV |
3686 | |
3687 | if (stdout_save != INVALID_HANDLE_VALUE) | |
3688 | _open_osfhandle ((long) stdout_save, O_TEXT); | |
3689 | else | |
76b3903d GV |
3690 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3691 | _fdopen (1, "w"); | |
480b0c5b GV |
3692 | |
3693 | if (stderr_save != INVALID_HANDLE_VALUE) | |
3694 | _open_osfhandle ((long) stderr_save, O_TEXT); | |
3695 | else | |
76b3903d GV |
3696 | _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY); |
3697 | _fdopen (2, "w"); | |
480b0c5b GV |
3698 | } |
3699 | ||
3700 | /* unfortunately, atexit depends on implementation of malloc */ | |
3701 | /* atexit (term_ntproc); */ | |
3702 | signal (SIGABRT, term_ntproc); | |
76b3903d GV |
3703 | |
3704 | /* determine which drives are fixed, for GetCachedVolumeInformation */ | |
3705 | { | |
3706 | /* GetDriveType must have trailing backslash. */ | |
3707 | char drive[] = "A:\\"; | |
3708 | ||
3709 | /* Loop over all possible drive letters */ | |
3710 | while (*drive <= 'Z') | |
3711 | { | |
3712 | /* Record if this drive letter refers to a fixed drive. */ | |
3713 | fixed_drives[DRIVE_INDEX (*drive)] = | |
3714 | (GetDriveType (drive) == DRIVE_FIXED); | |
3715 | ||
3716 | (*drive)++; | |
3717 | } | |
a302c7ae AI |
3718 | |
3719 | /* Reset the volume info cache. */ | |
3720 | volume_cache = NULL; | |
76b3903d | 3721 | } |
d54abccd GV |
3722 | |
3723 | /* Check to see if Emacs has been installed correctly. */ | |
3724 | check_windows_init_file (); | |
480b0c5b GV |
3725 | } |
3726 | ||
3727 | /* end of nt.c */ |