summaryrefslogtreecommitdiff
path: root/lib/mountlist.c
blob: 37c3d1bddbe0c5748dc8d169780cbb662a95ee7a (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
/* mountlist.c -- return a list of mounted filesystems
   Copyright (C) 1991, 1992 Free Software Foundation, Inc.

   This program 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 2, or (at your option)
   any later version.

   This program 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 this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <sys/types.h>
#include "mountlist.h"

#ifdef STDC_HEADERS
#include <stdlib.h>
#else
void free ();
#endif
#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
#include <string.h>
#else
#include <strings.h>
#endif

char *strstr ();
char *xmalloc ();
char *xrealloc ();
char *xstrdup ();
void error ();

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#if defined (MOUNTED_GETFSSTAT)	/* __alpha running OSF_1 */
#  include <sys/mount.h>
#  include <sys/fs_types.h>
#endif /* MOUNTED_GETFSSTAT */

#ifdef MOUNTED_GETMNTENT1	/* 4.3BSD, SunOS, HP-UX, Dynix, Irix.  */
#include <mntent.h>
#if !defined(MOUNTED)
#  if defined(MNT_MNTTAB)	/* HP-UX.  */
#    define MOUNTED MNT_MNTTAB
#  endif
#  if defined(MNTTABNAME)	/* Dynix.  */
#    define MOUNTED MNTTABNAME
#  endif
#endif
#endif

#ifdef MOUNTED_GETMNTINFO	/* 4.4BSD.  */
#include <sys/mount.h>
#endif

#ifdef MOUNTED_GETMNT		/* Ultrix.  */
#include <sys/mount.h>
#include <sys/fs_types.h>
#endif

#ifdef MOUNTED_FREAD		/* SVR2.  */
#include <mnttab.h>
#endif

#ifdef MOUNTED_FREAD_FSTYP	/* SVR3.  */
#include <mnttab.h>
#include <sys/fstyp.h>
#include <sys/statfs.h>
#endif

#ifdef MOUNTED_LISTMNTENT
#include <mntent.h>
#endif

#ifdef MOUNTED_GETMNTENT2	/* SVR4.  */
#include <sys/mnttab.h>
#endif

#ifdef MOUNTED_VMOUNT		/* AIX.  */
#include <fshelp.h>
#include <sys/vfs.h>
#endif

#ifdef DOLPHIN
/* So special that it's not worth putting this in autoconf.  */
#undef MOUNTED_FREAD_FSTYP
#define MOUNTED_GETMNTTBL
#endif

#ifdef MOUNTED_GETMNTENT1	/* 4.3BSD, SunOS, HP-UX, Dynix, Irix.  */
/* Return the value of the hexadecimal number represented by CP.
   No prefix (like '0x') or suffix (like 'h') is expected to be
   part of CP. */

static int
xatoi (cp)
     char *cp;
{
  int val;

  val = 0;
  while (*cp)
    {
      if (*cp >= 'a' && *cp <= 'f')
	val = val * 16 + *cp - 'a' + 10;
      else if (*cp >= 'A' && *cp <= 'F')
	val = val * 16 + *cp - 'A' + 10;
      else if (*cp >= '0' && *cp <= '9')
	val = val * 16 + *cp - '0';
      else
	break;
      cp++;
    }
  return val;
}
#endif /* MOUNTED_GETMNTENT1.  */

#if defined (MOUNTED_GETMNTINFO) && !defined (__NetBSD__)
static char *
fstype_to_string (t)
     short t;
{
  switch (t)
    {
#ifdef MOUNT_PC
    case MOUNT_PC:
      return "pc";
#endif
#ifdef MOUNT_MFS
    case MOUNT_MFS:
      return "mfs";
#endif
#ifdef MOUNT_LO
    case MOUNT_LO:
      return "lo";
#endif
#ifdef MOUNT_TFS
    case MOUNT_TFS:
      return "tfs";
#endif
#ifdef MOUNT_TMP
    case MOUNT_TMP:
      return "tmp";
#endif
#ifdef MOUNT_UFS
   case MOUNT_UFS:
     return "ufs" ;
#endif
#ifdef MOUNT_NFS
   case MOUNT_NFS:
     return "nfs" ;
#endif
#ifdef MOUNT_MSDOS
   case MOUNT_MSDOS:
     return "msdos" ;
#endif
#ifdef MOUNT_LFS
   case MOUNT_LFS:
     return "lfs" ;
#endif
#ifdef MOUNT_LOFS
   case MOUNT_LOFS:
     return "lofs" ;
#endif
#ifdef MOUNT_FDESC
   case MOUNT_FDESC:
     return "fdesc" ;
#endif
#ifdef MOUNT_PORTAL
   case MOUNT_PORTAL:
     return "portal" ;
#endif
#ifdef MOUNT_NULL
   case MOUNT_NULL:
     return "null" ;
#endif
#ifdef MOUNT_UMAP
   case MOUNT_UMAP:
     return "umap" ;
#endif
#ifdef MOUNT_KERNFS
   case MOUNT_KERNFS:
     return "kernfs" ;
#endif
#ifdef MOUNT_PROCFS
   case MOUNT_PROCFS:
     return "procfs" ;
#endif
#ifdef MOUNT_AFS
   case MOUNT_AFS:
     return "afs" ;
#endif
#ifdef MOUNT_CD9660
   case MOUNT_CD9660:
     return "cd9660" ;
#endif
#ifdef MOUNT_UNION
   case MOUNT_UNION:
     return "union" ;
#endif
#ifdef MOUNT_DEVFS
   case MOUNT_DEVFS:
     return "devfs" ;
#endif
#ifdef MOUNT_EXT2FS
   case MOUNT_EXT2FS:
     return "ext2fs" ;
#endif
    default:
      return "?";
    }
}
#endif /* MOUNTED_GETMNTINFO */

#ifdef MOUNTED_VMOUNT		/* AIX.  */
static char *
fstype_to_string (t)
     int t;
{
  struct vfs_ent *e;

  e = getvfsbytype (t);
  if (!e || !e->vfsent_name)
    return "none";
  else
    return e->vfsent_name;
}
#endif /* MOUNTED_VMOUNT */

/* Return a list of the currently mounted filesystems, or NULL on error.
   Add each entry to the tail of the list so that they stay in order.
   If NEED_FS_TYPE is nonzero, ensure that the filesystem type fields in
   the returned list are valid.  Otherwise, they might not be.
   If ALL_FS is zero, do not return entries for filesystems that
   are automounter (dummy) entries.  */

struct mount_entry *
read_filesystem_list (need_fs_type, all_fs)
     int need_fs_type, all_fs;
{
  struct mount_entry *mount_list;
  struct mount_entry *me;
  struct mount_entry *mtail;

  /* Start the list off with a dummy entry. */
  me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
  me->me_next = NULL;
  mount_list = mtail = me;

#ifdef MOUNTED_LISTMNTENT
  {
    struct tabmntent *mntlist, *p;
    struct mntent *mnt;
    struct mount_entry *me;
    
    /* the third and fourth arguments could be used to filter mounts,
       but Crays doesn't seem to have any mounts that we want to
       remove. Specifically, automount create normal NFS mounts.
       */

    if(listmntent(&mntlist, KMTAB, NULL, NULL) < 0)
      return NULL;
    p = mntlist;
    while(p){
      mnt = p->ment;
      me = (struct mount_entry*) xmalloc(sizeof (struct mount_entry));
      me->me_devname = xstrdup(mnt->mnt_fsname);
      me->me_mountdir = xstrdup(mnt->mnt_dir);
      me->me_type = xstrdup(mnt->mnt_type);
      me->me_dev = -1;
      me->me_next = NULL;
      mtail->me_next = me;
      mtail = me;
      p = p->next;
    }
    freemntlist(mntlist);
  }
#endif

#ifdef MOUNTED_GETMNTENT1	/* 4.3BSD, SunOS, HP-UX, Dynix, Irix.  */
  {
    struct mntent *mnt;
    char *table = MOUNTED;
    FILE *fp;
    char *devopt;

    fp = setmntent (table, "r");
    if (fp == NULL)
      return NULL;

    while ((mnt = getmntent (fp)))
      {
	if (!all_fs && (!strcmp (mnt->mnt_type, "ignore")
			|| !strcmp (mnt->mnt_type, "auto")))
	  continue;

	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (mnt->mnt_fsname);
	me->me_mountdir = xstrdup (mnt->mnt_dir);
	me->me_type = xstrdup (mnt->mnt_type);
	devopt = strstr (mnt->mnt_opts, "dev=");
	if (devopt)
	  {
	    if (devopt[4] == '0' && (devopt[5] == 'x' || devopt[5] == 'X'))
	      me->me_dev = xatoi (devopt + 6);
	    else
	      me->me_dev = xatoi (devopt + 4);
	  }
	else
	  me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }

    if (endmntent (fp) == 0)
      return NULL;
  }
#endif /* MOUNTED_GETMNTENT1. */

#ifdef MOUNTED_GETMNTINFO	/* 4.4BSD.  */
  {
    struct statfs *fsp;
    int entries;

    entries = getmntinfo (&fsp, MNT_NOWAIT);
    if (entries < 0)
      return NULL;
    while (entries-- > 0)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (fsp->f_mntfromname);
	me->me_mountdir = xstrdup (fsp->f_mntonname);
#ifdef __NetBSD__
	me->me_type = xstrdup (fsp->f_fstypename);
#else
	me->me_type = fstype_to_string (fsp->f_type);
#endif
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
	fsp++;
      }
  }
#endif /* MOUNTED_GETMNTINFO */

#ifdef MOUNTED_GETMNT		/* Ultrix.  */
  {
    int offset = 0;
    int val;
    struct fs_data fsd;

    while ((val = getmnt (&offset, &fsd, sizeof (fsd), NOSTAT_MANY,
			  (char *) 0)) > 0)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (fsd.fd_req.devname);
	me->me_mountdir = xstrdup (fsd.fd_req.path);
	me->me_type = gt_names[fsd.fd_req.fstype];
	me->me_dev = fsd.fd_req.dev;
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }
    if (val < 0)
      return NULL;
  }
#endif /* MOUNTED_GETMNT. */

#if defined (MOUNTED_GETFSSTAT)	/* __alpha running OSF_1 */
  {
    int numsys, counter, bufsize;
    struct statfs *stats;

    numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
    if (numsys < 0)
      return (NULL);

    bufsize = (1 + numsys) * sizeof (struct statfs);
    stats = (struct statfs *)xmalloc (bufsize);
    numsys = getfsstat (stats, bufsize, MNT_WAIT);

    if (numsys < 0)
      {
	free (stats);
	return (NULL);
      }

    for (counter = 0; counter < numsys; counter++)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (stats[counter].f_mntfromname);
	me->me_mountdir = xstrdup (stats[counter].f_mntonname);
	me->me_type = mnt_names[stats[counter].f_type];
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }

    free (stats);
  }
#endif /* MOUNTED_GETFSSTAT */

#if defined (MOUNTED_FREAD) || defined (MOUNTED_FREAD_FSTYP) /* SVR[23].  */
  {
    struct mnttab mnt;
    char *table = "/etc/mnttab";
    FILE *fp;

    fp = fopen (table, "r");
    if (fp == NULL)
      return NULL;

    while (fread (&mnt, sizeof mnt, 1, fp) > 0)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
#ifdef GETFSTYP			/* SVR3.  */
	me->me_devname = xstrdup (mnt.mt_dev);
#else
	me->me_devname = xmalloc (strlen (mnt.mt_dev) + 6);
	strcpy (me->me_devname, "/dev/");
	strcpy (me->me_devname + 5, mnt.mt_dev);
#endif
	me->me_mountdir = xstrdup (mnt.mt_filsys);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_type = "";
#ifdef GETFSTYP			/* SVR3.  */
	if (need_fs_type)
	  {
	    struct statfs fsd;
	    char typebuf[FSTYPSZ];

	    if (statfs (me->me_mountdir, &fsd, sizeof fsd, 0) != -1
		&& sysfs (GETFSTYP, fsd.f_fstyp, typebuf) != -1)
	      me->me_type = xstrdup (typebuf);
	  }
#endif
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }

    if (fclose (fp) == EOF)
      return NULL;
  }
#endif /* MOUNTED_FREAD || MOUNTED_FREAD_FSTYP.  */

#ifdef MOUNTED_GETMNTTBL	/* DolphinOS goes it's own way */
  {
    struct mntent **mnttbl=getmnttbl(),**ent;
    for (ent=mnttbl;*ent;ent++)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup ( (*ent)->mt_resource);
	me->me_mountdir = xstrdup( (*ent)->mt_directory);
	me->me_type =  xstrdup ((*ent)->mt_fstype);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }
    endmnttbl();
  }
#endif

#ifdef MOUNTED_GETMNTENT2	/* SVR4.  */
  {
    struct mnttab mnt;
    char *table = MNTTAB;
    FILE *fp;
    int ret;

    fp = fopen (table, "r");
    if (fp == NULL)
      return NULL;

    while ((ret = getmntent (fp, &mnt)) == 0)
      {
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	me->me_devname = xstrdup (mnt.mnt_special);
	me->me_mountdir = xstrdup (mnt.mnt_mountp);
	me->me_type = xstrdup (mnt.mnt_fstype);
	me->me_dev = (dev_t) -1;	/* Magic; means not known yet. */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }

    if (ret > 0)
      return NULL;
   if (fclose (fp) == EOF)
      return NULL;
  }
#endif /* MOUNTED_GETMNTENT2.  */

#ifdef MOUNTED_VMOUNT		/* AIX.  */
  {
    int bufsize;
    char *entries, *thisent;
    struct vmount *vmp;

    /* Ask how many bytes to allocate for the mounted filesystem info.  */
    mntctl (MCTL_QUERY, sizeof bufsize, (struct vmount *) &bufsize);
    entries = xmalloc (bufsize);

    /* Get the list of mounted filesystems.  */
    mntctl (MCTL_QUERY, bufsize, (struct vmount *) entries);

    for (thisent = entries; thisent < entries + bufsize;
	 thisent += vmp->vmt_length)
      {
	vmp = (struct vmount *) thisent;
	me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
	if (vmp->vmt_flags & MNT_REMOTE)
	  {
	    char *host, *path;

	    /* Prepend the remote pathname.  */
	    host = thisent + vmp->vmt_data[VMT_HOSTNAME].vmt_off;
	    path = thisent + vmp->vmt_data[VMT_OBJECT].vmt_off;
	    me->me_devname = xmalloc (strlen (host) + strlen (path) + 2);
	    strcpy (me->me_devname, host);
	    strcat (me->me_devname, ":");
	    strcat (me->me_devname, path);
	  }
	else
	  {
	    me->me_devname = xstrdup (thisent +
				      vmp->vmt_data[VMT_OBJECT].vmt_off);
	  }
	me->me_mountdir = xstrdup (thisent + vmp->vmt_data[VMT_STUB].vmt_off);
	me->me_type = xstrdup (fstype_to_string (vmp->vmt_gfstype));
	me->me_dev = (dev_t) -1; /* vmt_fsid might be the info we want.  */
	me->me_next = NULL;

	/* Add to the linked list. */
	mtail->me_next = me;
	mtail = me;
      }
    free (entries);
  }
#endif /* MOUNTED_VMOUNT. */

  /* Free the dummy head. */
  me = mount_list;
  mount_list = mount_list->me_next;
  free (me);
  return mount_list;
}