Commit | Line | Data |
---|---|---|
95ed0025 RS |
1 | /* Utility and Unix shadow routines for GNU Emacs on Windows NT. |
2 | Copyright (C) 1994 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 1, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, but WITHOUT | |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License along | |
17 | with GNU Emacs; see the file COPYING. If not, write to the Free Software | |
18 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | Geoff Voelker (voelker@cs.washington.edu) 7-29-94 | |
21 | */ | |
22 | ||
23 | #include <windows.h> | |
24 | #include <stdlib.h> | |
25 | #include <stdio.h> | |
26 | #include <io.h> | |
27 | #include <fcntl.h> | |
28 | #include <ctype.h> | |
29 | ||
30 | #include "config.h" | |
31 | #define getwd _getwd | |
32 | #include "lisp.h" | |
33 | #undef getwd | |
34 | ||
35 | #include <pwd.h> | |
36 | ||
37 | #include "ndir.h" | |
38 | #include "ntheap.h" | |
39 | ||
40 | extern int report_file_error (char *, Lisp_Object); | |
41 | ||
42 | /* Get the current working directory. */ | |
43 | int | |
44 | getwd (char *dir) | |
45 | { | |
46 | return GetCurrentDirectory (MAXPATHLEN, dir); | |
47 | } | |
48 | ||
49 | /* Emulate gethostname. */ | |
50 | int | |
51 | gethostname (char *buffer, int size) | |
52 | { | |
53 | /* NT only allows small host names, so the buffer is | |
54 | certainly large enough. */ | |
55 | return !GetComputerName (buffer, &size); | |
56 | } | |
57 | ||
58 | /* Emulate getloadavg. */ | |
59 | int | |
60 | getloadavg (double loadavg[], int nelem) | |
61 | { | |
62 | int i; | |
63 | ||
64 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
65 | for (i = 0; i < nelem; i++) | |
66 | { | |
67 | loadavg[i] = 0.0; | |
68 | } | |
69 | return i; | |
70 | } | |
71 | ||
72 | /* Emulate sleep...we could have done this with a define, but that | |
73 | would necessitate including windows.h in the files that used it. | |
74 | This is much easier. */ | |
75 | void | |
76 | nt_sleep (int seconds) | |
77 | { | |
78 | Sleep (seconds * 1000); | |
79 | } | |
80 | ||
81 | /* Emulate the Unix directory procedures opendir, closedir, | |
82 | and readdir. We can't use the procedures supplied in sysdep.c, | |
83 | so we provide them here. */ | |
84 | ||
85 | struct direct dir_static; /* simulated directory contents */ | |
86 | static int dir_finding; | |
87 | static HANDLE dir_find_handle; | |
88 | ||
89 | DIR * | |
90 | opendir (char *filename) | |
91 | { | |
92 | DIR *dirp; | |
93 | ||
94 | /* Opening is done by FindFirstFile. However, a read is inherent to | |
95 | this operation, so we have a flag to handle the open at read | |
96 | time. This flag essentially means "there is a find-handle open and | |
97 | it needs to be closed." */ | |
98 | ||
99 | if (!(dirp = (DIR *) malloc (sizeof (DIR)))) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | dirp->dd_fd = 0; | |
105 | dirp->dd_loc = 0; | |
106 | dirp->dd_size = 0; | |
107 | ||
108 | /* This is tacky, but we need the directory name for our | |
109 | implementation of readdir. */ | |
110 | strncpy (dirp->dd_buf, filename, DIRBLKSIZ); | |
111 | return dirp; | |
112 | } | |
113 | ||
114 | void | |
115 | closedir (DIR *dirp) | |
116 | { | |
117 | /* If we have a find-handle open, close it. */ | |
118 | if (dir_finding) | |
119 | { | |
120 | FindClose (dir_find_handle); | |
121 | dir_finding = 0; | |
122 | } | |
123 | xfree ((char *) dirp); | |
124 | } | |
125 | ||
126 | struct direct * | |
127 | readdir (DIR *dirp) | |
128 | { | |
129 | WIN32_FIND_DATA find_data; | |
130 | ||
131 | /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */ | |
132 | if (!dir_finding) | |
133 | { | |
134 | char filename[MAXNAMLEN + 3]; | |
135 | int ln; | |
136 | ||
137 | strncpy (filename, dirp->dd_buf, MAXNAMLEN); | |
138 | ln = strlen (filename)-1; | |
139 | if (filename[ln] != '\\' && filename[ln] != ':') | |
140 | strcat (filename, "\\"); | |
141 | strcat (filename, "*.*"); | |
142 | ||
143 | dir_find_handle = FindFirstFile (filename, &find_data); | |
144 | ||
145 | if (dir_find_handle == INVALID_HANDLE_VALUE) | |
146 | return NULL; | |
147 | ||
148 | dir_finding = 1; | |
149 | } | |
150 | else | |
151 | { | |
152 | if (!FindNextFile (dir_find_handle, &find_data)) | |
153 | return NULL; | |
154 | } | |
155 | ||
156 | /* Don't return . or .. since it doesn't look like any of the | |
157 | readdir calling code expects them. */ | |
158 | while (strcmp (find_data.cFileName, ".") == 0 | |
159 | || strcmp (find_data.cFileName, "..") == 0) | |
160 | { | |
161 | if (!FindNextFile (dir_find_handle, &find_data)) | |
162 | return 0; | |
163 | } | |
164 | ||
165 | /* NT's unique ID for a file is 64 bits, so we have to fake it here. | |
166 | This should work as long as we never use 0. */ | |
167 | dir_static.d_ino = 1; | |
168 | ||
169 | dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 + | |
170 | dir_static.d_namlen - dir_static.d_namlen % 4; | |
171 | ||
172 | dir_static.d_namlen = strlen (find_data.cFileName); | |
173 | strncpy (dir_static.d_name, find_data.cFileName, MAXNAMLEN); | |
174 | ||
175 | return &dir_static; | |
176 | } | |
177 | ||
178 | /* Emulate getpwuid and getpwnam. */ | |
179 | ||
180 | int getuid (); /* forward declaration */ | |
181 | ||
182 | static char the_passwd_name[256]; | |
183 | static char the_passwd_passwd[256]; | |
184 | static char the_passwd_gecos[256]; | |
185 | static char the_passwd_dir[256]; | |
186 | static char the_passwd_shell[256]; | |
187 | ||
188 | static struct passwd the_passwd = | |
189 | { | |
190 | the_passwd_name, | |
191 | the_passwd_passwd, | |
192 | 0, | |
193 | 0, | |
194 | 0, | |
195 | the_passwd_gecos, | |
196 | the_passwd_dir, | |
197 | the_passwd_shell, | |
198 | }; | |
199 | ||
200 | struct passwd * | |
201 | getpwuid (int uid) | |
202 | { | |
203 | int size = 256; | |
204 | ||
205 | if (!GetUserName (the_passwd.pw_name, &size)) | |
206 | return NULL; | |
207 | ||
208 | the_passwd.pw_passwd[0] = '\0'; | |
209 | the_passwd.pw_uid = 0; | |
210 | the_passwd.pw_gid = 0; | |
211 | strcpy (the_passwd.pw_gecos, the_passwd.pw_name); | |
212 | the_passwd.pw_dir[0] = '\0'; | |
213 | the_passwd.pw_shell[0] = '\0'; | |
214 | ||
215 | return &the_passwd; | |
216 | } | |
217 | ||
218 | struct passwd * | |
219 | getpwnam (char *name) | |
220 | { | |
221 | struct passwd *pw; | |
222 | ||
223 | pw = getpwuid (getuid ()); | |
224 | if (!pw) | |
225 | return pw; | |
226 | ||
227 | if (strcmp (name, pw->pw_name)) | |
228 | return NULL; | |
229 | ||
230 | return pw; | |
231 | } | |
232 | ||
233 | ||
234 | /* We don't have scripts to automatically determine the system configuration | |
235 | for Emacs before it's compiled, and we don't want to have to make the | |
236 | user enter it, so we define EMACS_CONFIGURATION to invoke this runtime | |
237 | routine. */ | |
238 | ||
239 | static char configuration_buffer[16]; | |
240 | ||
241 | char * | |
242 | get_emacs_configuration (void) | |
243 | { | |
244 | char *arch, *oem; | |
245 | ||
246 | /* Determine the processor type. */ | |
247 | switch (get_processor_type ()) | |
248 | { | |
249 | case PROCESSOR_INTEL_386: | |
250 | case PROCESSOR_INTEL_486: | |
251 | case PROCESSOR_INTEL_PENTIUM: | |
252 | arch = "i386"; | |
253 | break; | |
254 | case PROCESSOR_INTEL_860: | |
255 | arch = "i860"; | |
256 | break; | |
257 | case PROCESSOR_MIPS_R2000: | |
258 | case PROCESSOR_MIPS_R3000: | |
259 | case PROCESSOR_MIPS_R4000: | |
260 | arch = "mips"; | |
261 | break; | |
262 | case PROCESSOR_ALPHA_21064: | |
263 | arch = "alpha"; | |
264 | break; | |
265 | default: | |
266 | arch = "unknown"; | |
267 | break; | |
268 | } | |
269 | ||
270 | /* Let oem be "*" until we figure out how to decode the OEM field. */ | |
271 | oem = "*"; | |
272 | ||
273 | sprintf (configuration_buffer, "%s-%s-nt%d.%d", arch, oem, | |
274 | get_nt_major_version (), get_nt_minor_version ()); | |
275 | return configuration_buffer; | |
276 | } | |
277 | ||
278 | /* Conjure up inode and device numbers that will serve the purpose | |
279 | of Emacs. Return 1 upon success, 0 upon failure. */ | |
280 | int | |
281 | get_inode_and_device_vals (Lisp_Object filename, Lisp_Object *p_inode, | |
282 | Lisp_Object *p_device) | |
283 | { | |
284 | /* File uids on NT are found using a handle to a file, which | |
285 | implies that it has been opened. Since we want to be able | |
286 | to stat an arbitrary file, we must open it, get the info, | |
287 | and then close it. | |
288 | ||
289 | Also, NT file uids are 64-bits. This is a problem. */ | |
290 | ||
291 | HANDLE handle; | |
292 | BOOL result; | |
293 | BY_HANDLE_FILE_INFORMATION info; | |
294 | ||
295 | /* FIXME: It shouldn't be opened without READ access, but NT on x86 | |
296 | doesn't allow GetFileInfo in that case (NT on mips does). */ | |
297 | ||
298 | handle = CreateFile (XSTRING (filename)->data, | |
299 | GENERIC_READ, | |
300 | FILE_SHARE_READ | FILE_SHARE_WRITE, | |
301 | NULL, | |
302 | OPEN_EXISTING, | |
303 | FILE_ATTRIBUTE_NORMAL, | |
304 | NULL); | |
305 | if (handle == INVALID_HANDLE_VALUE) | |
306 | return 0; | |
307 | ||
308 | result = GetFileInformationByHandle (handle, &info); | |
309 | CloseHandle (handle); | |
310 | if (!result) | |
311 | return 0; | |
312 | ||
313 | *p_inode = make_number (info.nFileIndexLow); /* use the low value */ | |
314 | *p_device = make_number (info.dwVolumeSerialNumber); | |
315 | ||
316 | return 1; | |
317 | } | |
318 | ||
319 | /* The following pipe routines are used to support our fork emulation. | |
320 | Since NT's crt dup always creates inherited handles, we | |
321 | must be careful in setting up pipes. First create | |
322 | non-inherited pipe handles, then create an inherited handle | |
323 | to the write end by dup-ing it, and then close the non-inherited | |
324 | end that was just duped. This gives us one non-inherited handle | |
325 | on the read end and one inherited handle to the write end. As | |
326 | the parent, we close the inherited handle to the write end after | |
327 | spawning the child. */ | |
328 | ||
329 | /* From callproc.c */ | |
330 | extern Lisp_Object Vbinary_process_input; | |
331 | extern Lisp_Object Vbinary_process_output; | |
332 | ||
333 | void | |
334 | pipe_with_inherited_out (int fds[2]) | |
335 | { | |
336 | int inherit_out; | |
337 | unsigned int flags = _O_NOINHERIT; | |
338 | ||
339 | if (!NILP (Vbinary_process_output)) | |
340 | flags |= _O_BINARY; | |
341 | ||
342 | _pipe (fds, 0, flags); | |
343 | inherit_out = dup (fds[1]); | |
344 | close (fds[1]); | |
345 | fds[1] = inherit_out; | |
346 | } | |
347 | ||
348 | void | |
349 | pipe_with_inherited_in (int fds[2]) | |
350 | { | |
351 | int inherit_in; | |
352 | unsigned int flags = _O_NOINHERIT; | |
353 | ||
354 | if (!NILP (Vbinary_process_input)) | |
355 | flags |= _O_BINARY; | |
356 | ||
357 | _pipe (fds, 0, flags); | |
358 | inherit_in = dup (fds[0]); | |
359 | close (fds[0]); | |
360 | fds[0] = inherit_in; | |
361 | } | |
362 | ||
363 | /* The following two routines are used to manipulate stdin, stdout, and | |
364 | stderr of our child processes. | |
365 | ||
366 | Assuming that in, out, and err are inherited, we make them stdin, | |
367 | stdout, and stderr of the child as follows: | |
368 | ||
369 | - Save the parent's current standard handles. | |
370 | - Set the parent's standard handles to the handles being passed in. | |
371 | (Note that _get_osfhandle is an io.h procedure that | |
372 | maps crt file descriptors to NT file handles.) | |
373 | - Spawn the child, which inherits in, out, and err as stdin, | |
374 | stdout, and stderr. (see Spawnve) | |
375 | - Reset the parent's standard handles to the saved handles. | |
376 | (see reset_standard_handles) | |
377 | We assume that the caller closes in, out, and err after calling us. */ | |
378 | ||
379 | void | |
380 | prepare_standard_handles (int in, int out, int err, HANDLE handles[4]) | |
381 | { | |
382 | HANDLE parent, stdin_save, stdout_save, stderr_save, err_handle; | |
383 | ||
384 | parent = GetCurrentProcess (); | |
385 | if (!DuplicateHandle (parent, | |
386 | GetStdHandle (STD_INPUT_HANDLE), | |
387 | parent, | |
388 | &stdin_save, | |
389 | 0, | |
390 | FALSE, | |
391 | DUPLICATE_SAME_ACCESS)) | |
392 | report_file_error ("Duplicating parent's input handle", Qnil); | |
393 | ||
394 | if (!DuplicateHandle (parent, | |
395 | GetStdHandle (STD_OUTPUT_HANDLE), | |
396 | parent, | |
397 | &stdout_save, | |
398 | 0, | |
399 | FALSE, | |
400 | DUPLICATE_SAME_ACCESS)) | |
401 | report_file_error ("Duplicating parent's output handle", Qnil); | |
402 | ||
403 | if (!DuplicateHandle (parent, | |
404 | GetStdHandle (STD_ERROR_HANDLE), | |
405 | parent, | |
406 | &stderr_save, | |
407 | 0, | |
408 | FALSE, | |
409 | DUPLICATE_SAME_ACCESS)) | |
410 | report_file_error ("Duplicating parent's error handle", Qnil); | |
411 | ||
412 | if (!SetStdHandle (STD_INPUT_HANDLE, (HANDLE) _get_osfhandle (in))) | |
413 | report_file_error ("Changing stdin handle", Qnil); | |
414 | ||
415 | if (!SetStdHandle (STD_OUTPUT_HANDLE, (HANDLE) _get_osfhandle (out))) | |
416 | report_file_error ("Changing stdout handle", Qnil); | |
417 | ||
418 | /* We lose data if we use the same handle to the pipe for stdout and | |
419 | stderr, so make a duplicate. This took a while to find. */ | |
420 | if (out == err) | |
421 | { | |
422 | if (!DuplicateHandle (parent, | |
423 | (HANDLE) _get_osfhandle (err), | |
424 | parent, | |
425 | &err_handle, | |
426 | 0, | |
427 | TRUE, | |
428 | DUPLICATE_SAME_ACCESS)) | |
429 | report_file_error ("Duplicating out handle to make err handle.", | |
430 | Qnil); | |
431 | } | |
432 | else | |
433 | { | |
434 | err_handle = (HANDLE) _get_osfhandle (err); | |
435 | } | |
436 | ||
437 | if (!SetStdHandle (STD_ERROR_HANDLE, err_handle)) | |
438 | report_file_error ("Changing stderr handle", Qnil); | |
439 | ||
440 | handles[0] = stdin_save; | |
441 | handles[1] = stdout_save; | |
442 | handles[2] = stderr_save; | |
443 | handles[3] = err_handle; | |
444 | } | |
445 | ||
446 | void | |
447 | reset_standard_handles (int in, int out, int err, HANDLE handles[4]) | |
448 | { | |
449 | HANDLE stdin_save = handles[0]; | |
450 | HANDLE stdout_save = handles[1]; | |
451 | HANDLE stderr_save = handles[2]; | |
452 | HANDLE err_handle = handles[3]; | |
453 | ||
454 | if (!SetStdHandle (STD_INPUT_HANDLE, stdin_save)) | |
455 | report_file_error ("Resetting input handle", Qnil); | |
456 | ||
457 | if (!SetStdHandle (STD_OUTPUT_HANDLE, stdout_save)) | |
458 | report_file_error ("Resetting output handle", Qnil); | |
459 | ||
460 | if (!SetStdHandle (STD_ERROR_HANDLE, stderr_save)) | |
461 | report_file_error ("Resetting error handle", Qnil); | |
462 | ||
463 | if (out == err) | |
464 | { | |
465 | /* If out and err are the same handle, then we duplicated out | |
466 | and stuck it in err_handle. Close the duplicate to clean up. */ | |
467 | if (!CloseHandle (err_handle)) | |
468 | report_file_error ("Closing error handle duplicated from out.", | |
469 | Qnil); | |
470 | } | |
471 | } | |
472 | ||
473 | /* Destructively turn backslashes into slashes. */ | |
474 | void | |
475 | dostounix_filename (p) | |
476 | register char *p; | |
477 | { | |
478 | while (*p) | |
479 | { | |
480 | if (*p == '\\') | |
481 | *p = '/'; | |
482 | p++; | |
483 | } | |
484 | } | |
485 | ||
486 | /* Routines that are no-ops on NT but are defined to get Emacs to compile. */ | |
487 | ||
488 | ||
489 | int | |
490 | sigsetmask (int signal_mask) | |
491 | { | |
492 | return 0; | |
493 | } | |
494 | ||
495 | int | |
496 | sigblock (int sig) | |
497 | { | |
498 | return 0; | |
499 | } | |
500 | ||
501 | int | |
502 | kill (int pid, int signal) | |
503 | { | |
504 | return 0; | |
505 | } | |
506 | ||
507 | int | |
508 | setpgrp (int pid, int gid) | |
509 | { | |
510 | return 0; | |
511 | } | |
512 | ||
513 | int | |
514 | alarm (int seconds) | |
515 | { | |
516 | return 0; | |
517 | } | |
518 | ||
519 | int | |
520 | unrequest_sigio (void) | |
521 | { | |
522 | return 0; | |
523 | } | |
524 | ||
525 | int | |
526 | request_sigio (void) | |
527 | { | |
528 | return 0; | |
529 | } | |
530 | ||
531 | int | |
532 | getuid () | |
533 | { | |
534 | return 0; | |
535 | } | |
536 | ||
537 | int | |
538 | geteuid () | |
539 | { | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /* Remove all CR's that are followed by a LF. | |
544 | (From msdos.c...probably should figure out a way to share it, | |
545 | although this code isn't going to ever change.) */ | |
546 | int | |
547 | crlf_to_lf (n, buf) | |
548 | register int n; | |
549 | register unsigned char *buf; | |
550 | { | |
551 | unsigned char *np = buf; | |
552 | unsigned char *startp = buf; | |
553 | unsigned char *endp = buf + n; | |
554 | ||
555 | if (n == 0) | |
556 | return n; | |
557 | while (buf < endp - 1) | |
558 | { | |
559 | if (*buf == 0x0d) | |
560 | { | |
561 | if (*(++buf) != 0x0a) | |
562 | *np++ = 0x0d; | |
563 | } | |
564 | else | |
565 | *np++ = *buf++; | |
566 | } | |
567 | if (buf < endp) | |
568 | *np++ = *buf++; | |
569 | return np - startp; | |
570 | } | |
571 | ||
572 | ||
573 | #ifdef PIGSFLY | |
574 | Keep this around...we might need it later. | |
575 | #ifdef WINDOWSNT | |
576 | { | |
577 | /* | |
578 | * Find the user's real name by opening the process token and looking | |
579 | * up the name associated with the user-sid in that token. | |
580 | */ | |
581 | ||
582 | char b[256], Name[256], RefD[256]; | |
583 | DWORD length = 256, rlength = 256, trash; | |
584 | HANDLE Token; | |
585 | SID_NAME_USE User; | |
586 | ||
587 | if (1) | |
588 | Vuser_real_name = build_string ("foo"); | |
589 | else if (!OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &Token)) | |
590 | { | |
591 | Vuser_real_name = build_string ("unknown"); | |
592 | } | |
593 | else if (!GetTokenInformation (Token, TokenUser, (PVOID)b, 256, | |
594 | &trash)) | |
595 | { | |
596 | CloseHandle (Token); | |
597 | Vuser_real_name = build_string ("unknown"); | |
598 | } | |
599 | else if (!LookupAccountSid ((void *)0, (PSID)b, Name, &length, RefD, | |
600 | &rlength, &User)) | |
601 | { | |
602 | CloseHandle (Token); | |
603 | Vuser_real_name = build_string ("unknown"); | |
604 | } | |
605 | else | |
606 | Vuser_real_name = build_string (Name); | |
607 | } | |
608 | #else /* not WINDOWSNT */ | |
609 | #endif /* not WINDOWSNT */ | |
610 | #endif /* PIGSFLY */ |