summaryrefslogtreecommitdiff
path: root/src/w32.c
blob: 2a091d41ae2d036d909dbc2516846e757b3579ef (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
/* Utility and Unix shadow routines for GNU Emacs on Windows NT.
   Copyright (C) 1994 Free Software Foundation, Inc.

   This file is part of GNU Emacs.

   GNU Emacs is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 1, or (at your option) any later
   version.

   GNU Emacs is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   more details.

   You should have received a copy of the GNU General Public License along
   with GNU Emacs; see the file COPYING.  If not, write to the Free Software
   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

   Geoff Voelker (voelker@cs.washington.edu)                         7-29-94
*/

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#include <ctype.h>

#include "config.h"
#define getwd _getwd
#include "lisp.h"
#undef getwd

#include <pwd.h>

#include "ndir.h"
#include "ntheap.h"

extern int report_file_error (char *, Lisp_Object);

/* Get the current working directory.  */
int
getwd (char *dir)
{
  return GetCurrentDirectory (MAXPATHLEN, dir);
}

/* Emulate gethostname.  */
int
gethostname (char *buffer, int size)
{
  /* NT only allows small host names, so the buffer is 
     certainly large enough.  */
  return !GetComputerName (buffer, &size);
}

/* Emulate getloadavg.  */
int
getloadavg (double loadavg[], int nelem)
{
  int i;

  /* A faithful emulation is going to have to be saved for a rainy day.  */
  for (i = 0; i < nelem; i++) 
    {
      loadavg[i] = 0.0;
    }
  return i;
}

/* Emulate sleep...we could have done this with a define, but that
   would necessitate including windows.h in the files that used it.
   This is much easier.  */
void
nt_sleep (int seconds)
{
  Sleep (seconds * 1000);
}

/* Emulate the Unix directory procedures opendir, closedir, 
   and readdir.  We can't use the procedures supplied in sysdep.c,
   so we provide them here.  */

struct direct dir_static;       /* simulated directory contents */
static int    dir_finding;
static HANDLE dir_find_handle;

DIR *
opendir (char *filename)
{
  DIR *dirp;

  /* Opening is done by FindFirstFile.  However, a read is inherent to
     this operation, so we have a flag to handle the open at read
     time.  This flag essentially means "there is a find-handle open and
     it needs to be closed."  */

  if (!(dirp = (DIR *) malloc (sizeof (DIR)))) 
    {
      return 0;
    }

  dirp->dd_fd = 0;
  dirp->dd_loc = 0;
  dirp->dd_size = 0;

  /* This is tacky, but we need the directory name for our
     implementation of readdir.  */
  strncpy (dirp->dd_buf, filename, DIRBLKSIZ);
  return dirp;
}

void
closedir (DIR *dirp)
{
  /* If we have a find-handle open, close it.  */
  if (dir_finding) 
    {
      FindClose (dir_find_handle);
      dir_finding = 0;
    }
  xfree ((char *) dirp);
}

struct direct *
readdir (DIR *dirp)
{
  WIN32_FIND_DATA find_data;
  
  /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
  if (!dir_finding) 
    {
      char filename[MAXNAMLEN + 3];
      int ln;

      strncpy (filename, dirp->dd_buf, MAXNAMLEN);
      ln = strlen (filename)-1;
      if (filename[ln] != '\\' && filename[ln] != ':')
	strcat (filename, "\\");
      strcat (filename, "*.*");

      dir_find_handle = FindFirstFile (filename, &find_data);

      if (dir_find_handle == INVALID_HANDLE_VALUE) 
	return NULL;

      dir_finding = 1;
    } 
  else 
    {
      if (!FindNextFile (dir_find_handle, &find_data))
	return NULL;
    }
  
  /* Don't return . or .. since it doesn't look like any of the
     readdir calling code expects them.  */
  while (strcmp (find_data.cFileName, ".") == 0
	 || strcmp (find_data.cFileName, "..") == 0)
    {
      if (!FindNextFile (dir_find_handle, &find_data))
	return 0;
    }
  
  /* NT's unique ID for a file is 64 bits, so we have to fake it here.  
     This should work as long as we never use 0.  */
  dir_static.d_ino = 1;
  
  dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 +
    dir_static.d_namlen - dir_static.d_namlen % 4;
  
  dir_static.d_namlen = strlen (find_data.cFileName);
  strncpy (dir_static.d_name, find_data.cFileName, MAXNAMLEN);
  
  return &dir_static;
}

/* Emulate getpwuid and getpwnam.  */

int getuid ();	/* forward declaration */

static char the_passwd_name[256];
static char the_passwd_passwd[256];
static char the_passwd_gecos[256];
static char the_passwd_dir[256];
static char the_passwd_shell[256];

static struct passwd the_passwd = 
{
  the_passwd_name,
  the_passwd_passwd,
  0,
  0,
  0,
  the_passwd_gecos,
  the_passwd_dir,
  the_passwd_shell,
};

struct passwd *
getpwuid (int uid)
{
  int size = 256;
  
  if (!GetUserName (the_passwd.pw_name, &size))
    return NULL;

  the_passwd.pw_passwd[0] = '\0';
  the_passwd.pw_uid = 0;
  the_passwd.pw_gid = 0;
  strcpy (the_passwd.pw_gecos, the_passwd.pw_name);
  the_passwd.pw_dir[0] = '\0';
  the_passwd.pw_shell[0] = '\0';

  return &the_passwd;
}

struct passwd *
getpwnam (char *name)
{
  struct passwd *pw;
  
  pw = getpwuid (getuid ());
  if (!pw)
    return pw;

  if (strcmp (name, pw->pw_name))
    return NULL;

  return pw;
}


/* We don't have scripts to automatically determine the system configuration
   for Emacs before it's compiled, and we don't want to have to make the
   user enter it, so we define EMACS_CONFIGURATION to invoke this runtime
   routine.  */

static char configuration_buffer[16];

char *
get_emacs_configuration (void)
{
    char *arch, *oem;

    /* Determine the processor type.  */
    switch (get_processor_type ()) 
      {
      case PROCESSOR_INTEL_386:
      case PROCESSOR_INTEL_486:
      case PROCESSOR_INTEL_PENTIUM:
	arch = "i386";
	break;
      case PROCESSOR_INTEL_860:
	arch = "i860";
	break;
      case PROCESSOR_MIPS_R2000:
      case PROCESSOR_MIPS_R3000:
      case PROCESSOR_MIPS_R4000:
	arch = "mips";
	break;
      case PROCESSOR_ALPHA_21064:
	arch = "alpha";
	break;
      default:
	arch = "unknown";
	break;
      }

    /* Let oem be "*" until we figure out how to decode the OEM field.  */
    oem = "*";

    sprintf (configuration_buffer, "%s-%s-nt%d.%d", arch, oem,
	     get_nt_major_version (), get_nt_minor_version ());
    return configuration_buffer;
}

/* Conjure up inode and device numbers that will serve the purpose
   of Emacs.  Return 1 upon success, 0 upon failure.  */
int
get_inode_and_device_vals (Lisp_Object filename, Lisp_Object *p_inode, 
			   Lisp_Object *p_device)
{
  /* File uids on NT are found using a handle to a file, which
     implies that it has been opened.  Since we want to be able
     to stat an arbitrary file, we must open it, get the info,
     and then close it.
     
     Also, NT file uids are 64-bits.  This is a problem.  */

  HANDLE handle;
  BOOL result;
  BY_HANDLE_FILE_INFORMATION info;

  /* FIXME:  It shouldn't be opened without READ access, but NT on x86
     doesn't allow GetFileInfo in that case (NT on mips does).  */
     
  handle = CreateFile (XSTRING (filename)->data,
		       GENERIC_READ,
		       FILE_SHARE_READ | FILE_SHARE_WRITE,
		       NULL,
		       OPEN_EXISTING,
		       FILE_ATTRIBUTE_NORMAL,
		       NULL);
  if (handle == INVALID_HANDLE_VALUE)
    return 0;

  result = GetFileInformationByHandle (handle, &info);
  CloseHandle (handle);
  if (!result)
    return 0;

  *p_inode = make_number (info.nFileIndexLow);	        /* use the low value */
  *p_device = make_number (info.dwVolumeSerialNumber);

  return 1;
}

/* The following pipe routines are used to support our fork emulation.
   Since NT's crt dup always creates inherited handles, we
   must be careful in setting up pipes.  First create 
   non-inherited pipe handles, then create an inherited handle
   to the write end by dup-ing it, and then close the non-inherited
   end that was just duped.  This gives us one non-inherited handle
   on the read end and one inherited handle to the write end.  As
   the parent, we close the inherited handle to the write end after
   spawning the child.  */

/* From callproc.c  */
extern Lisp_Object Vbinary_process_input;
extern Lisp_Object Vbinary_process_output;

void
pipe_with_inherited_out (int fds[2])
{
  int inherit_out;
  unsigned int flags = _O_NOINHERIT;

  if (!NILP (Vbinary_process_output))
    flags |= _O_BINARY;

  _pipe (fds, 0, flags);
  inherit_out = dup (fds[1]);
  close (fds[1]);
  fds[1] = inherit_out;
}

void
pipe_with_inherited_in (int fds[2])
{
  int inherit_in;
  unsigned int flags = _O_NOINHERIT;

  if (!NILP (Vbinary_process_input))
    flags |= _O_BINARY;

  _pipe (fds, 0, flags);
  inherit_in = dup (fds[0]);
  close (fds[0]);
  fds[0] = inherit_in;
}

/* The following two routines are used to manipulate stdin, stdout, and
   stderr of our child processes.

   Assuming that in, out, and err are inherited, we make them stdin,
   stdout, and stderr of the child as follows:

   - Save the parent's current standard handles.
   - Set the parent's standard handles to the handles being passed in.
     (Note that _get_osfhandle is an io.h procedure that 
     maps crt file descriptors to NT file handles.)
   - Spawn the child, which inherits in, out, and err as stdin,
     stdout, and stderr. (see Spawnve)
   - Reset the parent's standard handles to the saved handles.
     (see reset_standard_handles)
   We assume that the caller closes in, out, and err after calling us.  */

void
prepare_standard_handles (int in, int out, int err, HANDLE handles[4])
{
  HANDLE parent, stdin_save, stdout_save, stderr_save, err_handle;
  
  parent = GetCurrentProcess ();
  if (!DuplicateHandle (parent, 
		       GetStdHandle (STD_INPUT_HANDLE), 
		       parent,
		       &stdin_save, 
		       0, 
		       FALSE, 
		       DUPLICATE_SAME_ACCESS))
    report_file_error ("Duplicating parent's input handle", Qnil);
  
  if (!DuplicateHandle (parent,
		       GetStdHandle (STD_OUTPUT_HANDLE),
		       parent,
		       &stdout_save,
		       0,
		       FALSE,
		       DUPLICATE_SAME_ACCESS))
    report_file_error ("Duplicating parent's output handle", Qnil);
  
  if (!DuplicateHandle (parent,
		       GetStdHandle (STD_ERROR_HANDLE),
		       parent,
		       &stderr_save,
		       0,
		       FALSE,
		       DUPLICATE_SAME_ACCESS))
    report_file_error ("Duplicating parent's error handle", Qnil);
  
  if (!SetStdHandle (STD_INPUT_HANDLE, (HANDLE) _get_osfhandle (in)))
    report_file_error ("Changing stdin handle", Qnil);
  
  if (!SetStdHandle (STD_OUTPUT_HANDLE, (HANDLE) _get_osfhandle (out)))
    report_file_error ("Changing stdout handle", Qnil);
  
  /* We lose data if we use the same handle to the pipe for stdout and
     stderr, so make a duplicate.  This took a while to find.  */
  if (out == err) 
    {
      if (!DuplicateHandle (parent,
			   (HANDLE) _get_osfhandle (err),
			   parent,
			   &err_handle,
			   0,
			   TRUE,
			   DUPLICATE_SAME_ACCESS))
	report_file_error ("Duplicating out handle to make err handle.",
			  Qnil);
    } 
  else 
    {
      err_handle = (HANDLE) _get_osfhandle (err);
    }

  if (!SetStdHandle (STD_ERROR_HANDLE, err_handle))
    report_file_error ("Changing stderr handle", Qnil);

  handles[0] = stdin_save;
  handles[1] = stdout_save;
  handles[2] = stderr_save;
  handles[3] = err_handle;
}

void
reset_standard_handles (int in, int out, int err, HANDLE handles[4])
{
  HANDLE stdin_save = handles[0];
  HANDLE stdout_save = handles[1];
  HANDLE stderr_save = handles[2];
  HANDLE err_handle = handles[3];
  
  if (!SetStdHandle (STD_INPUT_HANDLE, stdin_save))
    report_file_error ("Resetting input handle", Qnil);
  
  if (!SetStdHandle (STD_OUTPUT_HANDLE, stdout_save))
    report_file_error ("Resetting output handle", Qnil);
  
  if (!SetStdHandle (STD_ERROR_HANDLE, stderr_save))
    report_file_error ("Resetting error handle", Qnil);
  
  if (out == err) 
    {
      /* If out and err are the same handle, then we duplicated out
	 and stuck it in err_handle.  Close the duplicate to clean up.  */
      if (!CloseHandle (err_handle))
	report_file_error ("Closing error handle duplicated from out.", 
			  Qnil);
    }
}

/* Destructively turn backslashes into slashes.  */
void
dostounix_filename (p)
     register char *p;
{
  while (*p)
    {
      if (*p == '\\')
	*p = '/';
      p++;
    }
}

/* Routines that are no-ops on NT but are defined to get Emacs to compile.  */


int 
sigsetmask (int signal_mask) 
{ 
  return 0;
}

int 
sigblock (int sig) 
{ 
  return 0;
}

int 
kill (int pid, int signal) 
{ 
  return 0;
}

int 
setpgrp (int pid, int gid) 
{ 
  return 0;
}

int 
alarm (int seconds) 
{ 
  return 0;
}

int 
unrequest_sigio (void) 
{ 
  return 0;
}

int 
request_sigio (void) 
{ 
  return 0;
}

int 
getuid () 
{ 
  return 0; 
}

int 
geteuid () 
{ 
  return 0; 
}

/* Remove all CR's that are followed by a LF.
   (From msdos.c...probably should figure out a way to share it,
   although this code isn't going to ever change.)  */
int
crlf_to_lf (n, buf)
     register int n;
     register unsigned char *buf;
{
  unsigned char *np = buf;
  unsigned char *startp = buf;
  unsigned char *endp = buf + n;

  if (n == 0)
    return n;
  while (buf < endp - 1)
    {
      if (*buf == 0x0d)
	{
	  if (*(++buf) != 0x0a)
	    *np++ = 0x0d;
	}
      else
	*np++ = *buf++;
    }
  if (buf < endp)
    *np++ = *buf++;
  return np - startp;
}


#ifdef PIGSFLY
Keep this around...we might need it later.
#ifdef WINDOWSNT
{
  /*
   * Find the user's real name by opening the process token and looking
   * up the name associated with the user-sid in that token.
   */

  char            b[256], Name[256], RefD[256];
  DWORD           length = 256, rlength = 256, trash;
  HANDLE          Token;
  SID_NAME_USE    User;

  if (1)
    Vuser_real_name = build_string ("foo");
  else if (!OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &Token))
    {
      Vuser_real_name = build_string ("unknown");
    }
  else if (!GetTokenInformation (Token, TokenUser, (PVOID)b, 256,
				 &trash))
    {
      CloseHandle (Token);
      Vuser_real_name = build_string ("unknown");
    }
  else if (!LookupAccountSid ((void *)0, (PSID)b, Name, &length, RefD,
			      &rlength, &User))
    {
      CloseHandle (Token);
      Vuser_real_name = build_string ("unknown");
    }
  else
    Vuser_real_name = build_string (Name);
}
#else   /* not WINDOWSNT */
#endif  /* not WINDOWSNT */
#endif  /* PIGSFLY */