summaryrefslogtreecommitdiff
path: root/source3/lib/sysacls.c
blob: fad717b3d595026c47f202f6a0b68a4c41ab3dcd (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
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
/* 
   Unix SMB/CIFS implementation.
   Samba system utilities for ACL support.
   Copyright (C) Jeremy Allison 2000.
   Copyright (C) Volker Lendecke 2006
   Copyright (C) Michael Adam 2006,2008
   
   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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "system/passwd.h"

#if defined(HAVE_POSIX_ACLS)
#include "modules/vfs_posixacl.h"
#endif

#if defined(HAVE_TRU64_ACLS)
#include "modules/vfs_tru64acl.h"
#endif

#if defined(HAVE_SOLARIS_ACLS) || defined(HAVE_UNIXWARE_ACLS)
#include "modules/vfs_solarisacl.h"
#endif

#if defined(HAVE_HPUX_ACLS)
#include "modules/vfs_hpuxacl.h"
#endif

#if defined(HAVE_IRIX_ACLS)
#include "modules/vfs_irixacl.h"
#endif

#undef  DBGC_CLASS
#define DBGC_CLASS DBGC_ACLS

/*
 * Note that while this code implements sufficient functionality
 * to support the sys_acl_* interfaces it does not provide all
 * of the semantics of the POSIX ACL interfaces.
 *
 * In particular, an ACL entry descriptor (SMB_ACL_ENTRY_T) returned
 * from a call to sys_acl_get_entry() should not be assumed to be
 * valid after calling any of the following functions, which may
 * reorder the entries in the ACL.
 *
 *	sys_acl_valid()
 *	sys_acl_set_file()
 *	sys_acl_set_fd()
 */

int sys_acl_get_entry(SMB_ACL_T acl_d, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	if (entry_id != SMB_ACL_FIRST_ENTRY && entry_id != SMB_ACL_NEXT_ENTRY) {
		errno = EINVAL;
		return -1;
	}

	if (entry_p == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (entry_id == SMB_ACL_FIRST_ENTRY) {
		acl_d->next = 0;
	}

	if (acl_d->next < 0) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->next >= acl_d->count) {
		return 0;
	}

	*entry_p = &acl_d->acl[acl_d->next++];

	return 1;
}

int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p)
{
	*type_p = entry_d->a_type;

	return 0;
}

int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	*permset_p = &entry_d->a_perm;

	return 0;
}

void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d)
{
	if (entry_d->a_type == SMB_ACL_USER) {
		return &entry_d->uid;
		}

	if (entry_d->a_type == SMB_ACL_GROUP) {
		return &entry_d->gid;
	}

	errno = EINVAL;
		return NULL;
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d)
{
	*permset_d = 0;

	return 0;
}

int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	if (perm != SMB_ACL_READ && perm != SMB_ACL_WRITE
	    && perm != SMB_ACL_EXECUTE) {
		errno = EINVAL;
		return -1;
		}
 
	if (permset_d == NULL) {
		errno = EINVAL;
		return -1;
	}

	*permset_d |= perm;
 
	return 0;
}

int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	return *permset_d & perm;
}

char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p)
{
	int	i;
	int	len, maxlen;
	char	*text;

	/*
	 * use an initial estimate of 20 bytes per ACL entry
	 * when allocating memory for the text representation
	 * of the ACL
	 */
	len	= 0;
	maxlen	= 20 * acl_d->count;
	if ((text = (char *)SMB_MALLOC(maxlen)) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	for (i = 0; i < acl_d->count; i++) {
		struct smb_acl_entry *ap = &acl_d->acl[i];
		struct group	*gr;
		char		tagbuf[12];
		char		idbuf[12];
		const char	*tag;
		const char	*id	= "";
		char		perms[4];
		int		nbytes;

		switch (ap->a_type) {
			/*
			 * for debugging purposes it's probably more
			 * useful to dump unknown tag types rather
			 * than just returning an error
			 */
			default:
				slprintf(tagbuf, sizeof(tagbuf)-1, "0x%x",
					 ap->a_type);
				tag = tagbuf;
				break;
 
			case SMB_ACL_USER:
				id = uidtoname(ap->uid);
			case SMB_ACL_USER_OBJ:
				tag = "user";
				break;

			case SMB_ACL_GROUP:
				if ((gr = getgrgid(ap->gid)) == NULL) {
					slprintf(idbuf, sizeof(idbuf)-1, "%ld",
						(long)ap->gid);
					id = idbuf;
				} else {
					id = gr->gr_name;
				}
			case SMB_ACL_GROUP_OBJ:
				tag = "group";
				break;

			case SMB_ACL_OTHER:
				tag = "other";
				break;

			case SMB_ACL_MASK:
				tag = "mask";
				break;

		}

		perms[0] = (ap->a_perm & SMB_ACL_READ) ? 'r' : '-';
		perms[1] = (ap->a_perm & SMB_ACL_WRITE) ? 'w' : '-';
		perms[2] = (ap->a_perm & SMB_ACL_EXECUTE) ? 'x' : '-';
		perms[3] = '\0';

		/*          <tag>      :  <qualifier>   :  rwx \n  \0 */
		nbytes = strlen(tag) + 1 + strlen(id) + 1 + 3 + 1 + 1;

		/*
		 * If this entry would overflow the buffer
		 * allocate enough additional memory for this
		 * entry and an estimate of another 20 bytes
		 * for each entry still to be processed
		 */
		if ((len + nbytes) > maxlen) {
			maxlen += nbytes + 20 * (acl_d->count - i);
			if ((text = (char *)SMB_REALLOC(text, maxlen)) == NULL) {
			errno = ENOMEM;
				return NULL;
		}
	}

		slprintf(&text[len], nbytes-1, "%s:%s:%s\n", tag, id, perms);
		len += nbytes - 1;
	}

	if (len_p)
		*len_p = len;

	return text;
}

SMB_ACL_T sys_acl_init(int count)
{
	SMB_ACL_T	a;

	if (count < 0) {
		errno = EINVAL;
		return NULL;
	}

	/*
	 * note that since the definition of the structure pointed
	 * to by the SMB_ACL_T includes the first element of the
	 * acl[] array, this actually allocates an ACL with room
	 * for (count+1) entries
	 */
	if ((a = (struct smb_acl_t *)SMB_MALLOC(
		     sizeof(struct smb_acl_t) +
		     count * sizeof(struct smb_acl_entry))) == NULL) {
		errno = ENOMEM;
		return NULL;
	}
 
	a->size = count + 1;
	a->count = 0;
	a->next = -1;

	return a;
}

int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p)
{
	SMB_ACL_T	acl_d;
	SMB_ACL_ENTRY_T	entry_d;

	if (acl_p == NULL || entry_p == NULL || (acl_d = *acl_p) == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->count >= acl_d->size) {
		errno = ENOSPC;
		return -1;
	}

	entry_d		= &acl_d->acl[acl_d->count++];
	entry_d->a_type	= SMB_ACL_TAG_INVALID;
	entry_d->uid	= -1;
	entry_d->gid	= -1;
	entry_d->a_perm	= 0;
	*entry_p	= entry_d;

	return 0;
}

int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type)
{
	switch (tag_type) {
		case SMB_ACL_USER:
		case SMB_ACL_USER_OBJ:
		case SMB_ACL_GROUP:
		case SMB_ACL_GROUP_OBJ:
		case SMB_ACL_OTHER:
		case SMB_ACL_MASK:
			entry_d->a_type = tag_type;
			break;
		default:
			errno = EINVAL;
			return -1;
		}

	return 0;
}

int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p)
{
	if (entry_d->a_type == SMB_ACL_USER) {
		entry_d->uid = *((uid_t *)qual_p);
		return 0;
		}
	if (entry_d->a_type == SMB_ACL_GROUP) {
		entry_d->gid = *((gid_t *)qual_p);
		return 0;
	}

	errno = EINVAL;
	return -1;
}

int sys_acl_set_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T permset_d)
{
	if (*permset_d & ~(SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) {
		errno = EINVAL;
		return -1;
	}

	entry_d->a_perm = *permset_d;
 
	return 0;
}

int sys_acl_free_text(char *text)
{
	SAFE_FREE(text);
	return 0;
}

int sys_acl_free_acl(SMB_ACL_T acl_d) 
{
	SAFE_FREE(acl_d);
	return 0;
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return 0;
}

int sys_acl_valid(SMB_ACL_T acl_d)
{
	errno = EINVAL;
	return -1;
}

/*
 * acl_get_file, acl_get_fd, acl_set_file, acl_set_fd and
 * sys_acl_delete_def_file are to be redirected to the default
 * statically-bound acl vfs module, but they are replacable.
 */
 
#if defined(HAVE_POSIX_ACLS)
 
SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle, 
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return posixacl_sys_acl_get_file(handle, path_p, type);
}
 
SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return posixacl_sys_acl_get_fd(handle, fsp);
}
 
int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return posixacl_sys_acl_set_file(handle, name, type, acl_d);
}
 
int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return posixacl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return posixacl_sys_acl_delete_def_file(handle, path);
}

#elif defined(HAVE_AIX_ACLS)

SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return aixacl_sys_acl_get_file(handle, path_p, type);
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return aixacl_sys_acl_get_fd(handle, fsp);
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return aixacl_sys_acl_set_file(handle, name, type, acl_d);
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return aixacl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return aixacl_sys_acl_delete_def_file(handle, path);
}

#elif defined(HAVE_TRU64_ACLS)
 
SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return tru64acl_sys_acl_get_file(handle, path_p, type);
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return tru64acl_sys_acl_get_fd(handle, fsp);
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return tru64acl_sys_acl_set_file(handle, name, type, acl_d);
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return tru64acl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return tru64acl_sys_acl_delete_def_file(handle, path);
}

#elif defined(HAVE_SOLARIS_ACLS) || defined(HAVE_UNIXWARE_ACLS)

SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return solarisacl_sys_acl_get_file(handle, path_p, type);
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return solarisacl_sys_acl_get_fd(handle, fsp);
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return solarisacl_sys_acl_set_file(handle, name, type, acl_d);
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return solarisacl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return solarisacl_sys_acl_delete_def_file(handle, path);
}

#elif defined(HAVE_HPUX_ACLS)

SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return hpuxacl_sys_acl_get_file(handle, path_p, type);
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return hpuxacl_sys_acl_get_fd(handle, fsp);
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return hpuxacl_sys_acl_set_file(handle, name, type, acl_d);
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return hpuxacl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return hpuxacl_sys_acl_delete_def_file(handle, path);
}

#elif defined(HAVE_IRIX_ACLS)

SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
	return irixacl_sys_acl_get_file(handle, path_p, type);
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
	return irixacl_sys_acl_get_fd(handle, fsp);
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return irixacl_sys_acl_set_file(handle, name, type, acl_d);
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
	return irixacl_sys_acl_set_fd(handle, fsp, acl_d);
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
	return irixacl_sys_acl_delete_def_file(handle, path);
}

#else /* No ACLs. */

SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
			   const char *path_p, SMB_ACL_TYPE_T type)
{
#ifdef ENOTSUP
	errno = ENOTSUP;
#else
	errno = ENOSYS;
#endif
	return NULL;
}

SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp)
{
#ifdef ENOTSUP
	errno = ENOTSUP;
#else
	errno = ENOSYS;
#endif
	return NULL;
}

int sys_acl_set_file(vfs_handle_struct *handle,
		     const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
#ifdef ENOTSUP
	errno = ENOTSUP;
#else
	errno = ENOSYS;
#endif
	return -1;
}

int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
		   SMB_ACL_T acl_d)
{
#ifdef ENOTSUP
	errno = ENOTSUP;
#else
	errno = ENOSYS;
#endif
	return -1;
}

int sys_acl_delete_def_file(vfs_handle_struct *handle,
			    const char *path)
{
#ifdef ENOTSUP
	errno = ENOTSUP;
#else
	errno = ENOSYS;
#endif
	return -1;
}

#endif

/************************************************************************
 Deliberately outside the ACL defines. Return 1 if this is a "no acls"
 errno, 0 if not.
************************************************************************/

int no_acl_syscall_error(int err)
{
#if defined(ENOSYS)
	if (err == ENOSYS) {
		return 1;
	}
#endif
#if defined(ENOTSUP)
	if (err == ENOTSUP) {
		return 1;
	}
#endif
	return 0;
}