summaryrefslogtreecommitdiff
path: root/lib/libalpm/alpm.c
blob: da3eaae0c3649ec4315d2c5c039c8e51d09f2d12 (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
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
/*
 *  alpm.c
 * 
 *  Copyright (c) 2002 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  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 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
#include <syslog.h>
#include <limits.h> /* PATH_MAX */
#include <stdarg.h>
/* pacman */
#include "log.h"
#include "error.h"
#include "versioncmp.h"
#include "md5.h"
#include "list.h"
#include "package.h"
#include "group.h"
#include "util.h"
#include "db.h"
#include "cache.h"
#include "deps.h"
#include "backup.h"
#include "add.h"
#include "remove.h"
#include "sync.h"
#include "handle.h"
#include "alpm.h"

#define PM_LOCK   "/tmp/pacman.lck"

/* Globals */
pmhandle_t *handle = NULL;
enum __pmerrno_t pm_errno;

/** @defgroup alpm_interface Interface Functions
 * @{
 */

/** Initializes the library.  This must be called before any other
 * functions are called.
 * @param root the full path of the root we'll be installing to (usually /)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_initialize(char *root)
{
	char str[PATH_MAX];

	ASSERT(handle == NULL, RET_ERR(PM_ERR_HANDLE_NOT_NULL, -1));

	handle = handle_new();
	if(handle == NULL) {
		RET_ERR(PM_ERR_MEMORY, -1);
	}

	/* lock db */
	if(handle->access == PM_ACCESS_RW) {
		handle->lckfd = _alpm_lckmk(PM_LOCK);
		if(handle->lckfd == -1) {
			FREE(handle);
			RET_ERR(PM_ERR_HANDLE_LOCK, -1);
		}
	}

	STRNCPY(str, (root) ? root : PM_ROOT, PATH_MAX);
	/* add a trailing '/' if there isn't one */
	if(str[strlen(str)-1] != '/') {
		strcat(str, "/");
	}
	handle->root = strdup(str);

	return(0);
}

/** Release the library.  This should be the last alpm call you make.
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_release()
{
	PMList *i;

	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	/* unlock db */
	if(handle->access == PM_ACCESS_RW) {
		if(handle->lckfd != -1) {
			close(handle->lckfd);
			handle->lckfd = -1;
		}
		if(_alpm_lckrm(PM_LOCK)) {
			_alpm_log(PM_LOG_WARNING, "could not remove lock file %s", PM_LOCK);
			alpm_logaction("warning: could not remove lock file %s", PM_LOCK);
		}
	}

	/* close local database */
	if(handle->db_local) {
		db_close(handle->db_local);
		handle->db_local = NULL;
	}
	/* and also sync ones */
	for(i = handle->dbs_sync; i; i = i->next) {
		db_close(i->data);
		i->data = NULL;
	}

	FREEHANDLE(handle);

	return(0);
}
/** @} */

/** @defgroup alpm_options Library Options
 * @{
 */

/** Set a library option.
 * @param parm the name of the parameter
 * @param data the value of the parameter
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_set_option(unsigned char parm, unsigned long data)
{
	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	return(handle_set_option(handle, parm, data));
}

/** Get the value of a library option.
 * @param parm the parameter to get
 * @param data pointer argument to get the value in
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_get_option(unsigned char parm, long *data)
{
	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
	ASSERT(data != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));

	return(handle_get_option(handle, parm, data));
}
/** @} */

/** @defgroup alpm_databases Database Functions
 * @{
 */

/** Register a package database
 * @param treename the name of the repository
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
pmdb_t *alpm_db_register(char *treename)
{
	pmdb_t *db;
	int found = 0;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, NULL));
	ASSERT(treename != NULL && strlen(treename) != 0, RET_ERR(PM_ERR_WRONG_ARGS, NULL));
	/* Do not register a database if a transaction is on-going */
	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, NULL));

	if(strcmp(treename, "local") == 0) {
		if(handle->db_local != NULL) {
			found = 1;
		}
	} else {
		PMList *i;
		for(i = handle->dbs_sync; i && !found; i = i->next) {
			pmdb_t *sdb = i->data;
			if(strcmp(treename, sdb->treename) == 0) {
				found = 1;
			}
		}
	}
	if(found) {
		RET_ERR(PM_ERR_DB_NOT_NULL, NULL);
	}

	db = db_open(handle->root, handle->dbpath, treename);
	if(db == NULL) {
		/* couldn't open the db directory - try creating it */
		if(db_create(handle->root, handle->dbpath, treename) == -1) {
			RET_ERR(PM_ERR_DB_CREATE, NULL);
		}
		db = db_open(handle->root, handle->dbpath, treename);
		if(db == NULL) {
			/* couldn't open the db directory */
			RET_ERR(PM_ERR_DB_OPEN, NULL);
		}
	}

	if(strcmp(treename, "local") == 0) {
		handle->db_local = db;
	} else {
		handle->dbs_sync = pm_list_add(handle->dbs_sync, db);
	}

	return(db);
}

/** Helper function for comparing databases
 * @param db1 first database
 * @param db2 second database
 * @return an integer less than, equal to, or greater than zero if the name of
 * db1 is found, respectively, to be less than, to match, or be greater than
 * the name of db2.
 */
static int db_cmp(const void *db1, const void *db2)
{
	return(strcmp(((pmdb_t *)db1)->treename, ((pmdb_t *)db2)->treename));
}

/** Unregister a package database
 * @param db pointer to the package database to unregister
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_db_unregister(pmdb_t *db)
{
	int found = 0;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
	ASSERT(db != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
	/* Do not unregister a database if a transaction is on-going */
	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));

	if(db == handle->db_local) {
		db_close(handle->db_local);
		handle->db_local = NULL;
		found = 1;
	} else {
		pmdb_t *data;
		handle->dbs_sync = _alpm_list_remove(handle->dbs_sync, db, db_cmp, (void **)&data);
		if(data) {
			db_close(data);
			found = 1;
		}
	}

	if(!found) {
		RET_ERR(PM_ERR_DB_NOT_FOUND, -1);
	}

	return(0);
}

/** Get informations about a database.
 * @param db database pointer
 * @param parm name of the info to get
 * @return a char* on success (the value), NULL on error
 */
void *alpm_db_getinfo(PM_DB *db, unsigned char parm)
{
	void *data = NULL;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));

	switch(parm) {
		case PM_DB_TREENAME:   data = db->treename; break;
		case PM_DB_LASTUPDATE: data = db->lastupdate; break;
		default:
			data = NULL;
	}

	return(data);
}

/** Update a package database
 * @param db pointer to the package database to update
 * @param archive path to the new package database tarball
 * @param ts timestamp of the last modification time of the tarball
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_db_update(PM_DB *db, char *archive, char *ts)
{
	PMList *lp;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
	ASSERT(db != NULL && db != handle->db_local, RET_ERR(PM_ERR_WRONG_ARGS, -1));
	/* Do not update a database if a transaction is on-going */
	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));

	if(!pm_list_is_in(db, handle->dbs_sync)) {
		RET_ERR(PM_ERR_DB_NOT_FOUND, -1);
	}

	if(ts && strlen(ts) != 0) {
		if(strcmp(ts, db->lastupdate) == 0) {
			RET_ERR(PM_ERR_DB_UPTODATE, -1);
		}
	}

	/* remove the old dir */
	_alpm_log(PM_LOG_FLOW2, "flushing database %s/%s", handle->dbpath, db->treename);
	for(lp = db_get_pkgcache(db); lp; lp = lp->next) {
		if(db_remove(db, lp->data) == -1) {
			if(lp->data) {
				_alpm_log(PM_LOG_ERROR, "could not remove database entry %s/%s", db->treename,
				                        ((pmpkg_t *)lp->data)->name);
			}
			RET_ERR(PM_ERR_XXX, -1);
		}
	}

	/* Cache needs to be rebuild */
	db_free_pkgcache(db);

	/* uncompress the sync database */
	/* ORE
	we should not simply unpack the archive, but better parse it and 
	db_write each entry (see sync_load_dbarchive to get archive content) */
	_alpm_log(PM_LOG_FLOW2, "unpacking %s", archive);
	if(_alpm_unpack(archive, db->path, NULL)) {
		RET_ERR(PM_ERR_XXX, -1);
	}

	if(ts && strlen(ts) != 0) {
		if(db_setlastupdate(db, ts) == -1) {
			RET_ERR(PM_ERR_XXX, -1);
		}
	}

	return(0);
}

/** Get a package entry from a package database
 * @param db pointer to the package database to get the package from
 * @param name of the package
 * @return the package entry on success, NULL on error
 */
pmpkg_t *alpm_db_readpkg(pmdb_t *db, char *name)
{
	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));
	ASSERT(name != NULL && strlen(name) != 0, return(NULL));

	return(db_get_pkgfromcache(db, name));
}

/** Get the package cache of a package database
 * @param db pointer to the package database to get the package from
 * @return the list of packages on success, NULL on error
 */
PMList *alpm_db_getpkgcache(pmdb_t *db)
{
	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));

	return(db_get_pkgcache(db));
}

/** Get a group entry from a package database
 * @param db pointer to the package database to get the group from
 * @param name of the group
 * @return the groups entry on success, NULL on error
 */
pmgrp_t *alpm_db_readgrp(pmdb_t *db, char *name)
{
	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));
	ASSERT(name != NULL && strlen(name) != 0, return(NULL));

	return(db_get_grpfromcache(db, name));
}

/** Get the group cache of a package database
 * @param db pointer to the package database to get the group from
 * @return the list of groups on success, NULL on error
 */
PMList *alpm_db_getgrpcache(pmdb_t *db)
{
	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));

	return(db_get_grpcache(db));
}
/** @} */

/** @defgroup alpm_packages Package Functions
 * @{
 */

/** Get informations about a package.
 * @param pkg package pointer
 * @param parm name of the info to get
 * @return a void* on success (the value), NULL on error
 */
void *alpm_pkg_getinfo(pmpkg_t *pkg, unsigned char parm)
{
	void *data = NULL;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(pkg != NULL, return(NULL));

	/* Update the cache package entry if needed */
	if(pkg->origin == PKG_FROM_CACHE) {
		switch(parm) {
			/* Desc entry */
			case PM_PKG_NAME:
			case PM_PKG_VERSION:
			case PM_PKG_DESC:
			case PM_PKG_GROUPS:
			case PM_PKG_URL:
			case PM_PKG_LICENSE:
			case PM_PKG_ARCH:
			case PM_PKG_BUILDDATE:
			case PM_PKG_INSTALLDATE:
			case PM_PKG_PACKAGER:
			case PM_PKG_SIZE:
			case PM_PKG_REASON:
			case PM_PKG_MD5SUM:
				if(!(pkg->infolevel & INFRQ_DESC)) {
					char target[PKG_FULLNAME_LEN];
					snprintf(target, PKG_FULLNAME_LEN, "%s-%s", pkg->name, pkg->version);
					db_read(pkg->data, target, INFRQ_DESC, pkg);
				}
			break;
			/* Depends entry */
			/* not needed: the cache is loaded with DEPENDS by default
			case PM_PKG_DEPENDS:
			case PM_PKG_REQUIREDBY:
			case PM_PKG_CONFLICTS:
			case PM_PKG_PROVIDES:
			case PM_PKG_REPLACES:
				if(!(pkg->infolevel & INFRQ_DEPENDS)) {
					char target[PKG_FULLNAME_LEN];
					snprintf(target, PKG_FULLNAME_LEN, "%s-%s", pkg->name, pkg->version);
					db_read(pkg->data, target, INFRQ_DEPENDS, pkg);
				}
			break;*/
			/* Files entry */
			case PM_PKG_FILES:
			case PM_PKG_BACKUP:
				if(pkg->data == handle->db_local && !(pkg->infolevel & INFRQ_FILES)) {
					char target[PKG_FULLNAME_LEN];
					snprintf(target, PKG_FULLNAME_LEN, "%s-%s", pkg->name, pkg->version);
					db_read(pkg->data, target, INFRQ_FILES, pkg);
				}
			break;
			/* Scriptlet */
			case PM_PKG_SCRIPLET:
				if(pkg->data == handle->db_local && !(pkg->infolevel & INFRQ_SCRIPLET)) {
					char target[PKG_FULLNAME_LEN];
					snprintf(target, PKG_FULLNAME_LEN, "%s-%s", pkg->name, pkg->version);
					db_read(pkg->data, target, INFRQ_SCRIPLET, pkg);
				}
			break;
		}
	}

	switch(parm) {
		case PM_PKG_NAME:        data = pkg->name; break;
		case PM_PKG_VERSION:     data = pkg->version; break;
		case PM_PKG_DESC:        data = pkg->desc; break;
		case PM_PKG_GROUPS:      data = pkg->groups; break;
		case PM_PKG_URL:         data = pkg->url; break;
		case PM_PKG_ARCH:        data = pkg->arch; break;
		case PM_PKG_BUILDDATE:   data = pkg->builddate; break;
		case PM_PKG_INSTALLDATE: data = pkg->installdate; break;
		case PM_PKG_PACKAGER:    data = pkg->packager; break;
		case PM_PKG_SIZE:        data = (void *)pkg->size; break;
		case PM_PKG_REASON:      data = (void *)(int)pkg->reason; break;
		case PM_PKG_LICENSE:     data = pkg->license; break;
		case PM_PKG_REPLACES:    data = pkg->replaces; break;
		case PM_PKG_MD5SUM:      data = pkg->md5sum; break;
		case PM_PKG_DEPENDS:     data = pkg->depends; break;
		case PM_PKG_REQUIREDBY:  data = pkg->requiredby; break;
		case PM_PKG_PROVIDES:    data = pkg->provides; break;
		case PM_PKG_CONFLICTS:   data = pkg->conflicts; break;
		case PM_PKG_FILES:       data = pkg->files; break;
		case PM_PKG_BACKUP:      data = pkg->backup; break;
		case PM_PKG_SCRIPLET:    data = (void *)(int)pkg->scriptlet; break;
		case PM_PKG_DATA:        data = pkg->data; break;
		default:
			data = NULL;
		break;
	}

	return(data);
}

/** Create a package from a file.
 * @param filename location of the package tarball
 * @param pkg address of the package pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_pkg_load(char *filename, pmpkg_t **pkg)
{
	/* Sanity checks */
	ASSERT(filename != NULL && strlen(filename) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1));
	ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));

	*pkg = pkg_load(filename);
	if(*pkg == NULL) {
		/* pm_errno is set by pkg_load */
		return(-1);
	}

	return(0);
}

/** Free a package.
 * @param pkg package pointer to free
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_pkg_free(pmpkg_t *pkg)
{
	ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
	ASSERT(pkg->origin != PKG_FROM_CACHE, RET_ERR(PM_ERR_XXX, -1));

	pkg_free(pkg);

	return(0);
}

/** Compare versions.
 * @param ver1 first version
 * @param ver2 secont version
 * @return postive, 0 or negative if ver1 is less, equal or more
 * than ver2, respectively.
 */
int alpm_pkg_vercmp(const char *ver1, const char *ver2)
{
	return(versioncmp(ver1, ver2));
}
/** @} */

/** @defgroup alpm_groups Group Functions
 * @{
 */

/** Get informations about a group.
 * @param grp group pointer
 * @param parm name of the info to get
 * @return a void* on success (the value), NULL on error
 */
void *alpm_grp_getinfo(pmgrp_t *grp, unsigned char parm)
{
	void *data = NULL;

	/* Sanity checks */
	ASSERT(grp != NULL, return(NULL));

	switch(parm) {
		case PM_GRP_NAME:     data = grp->name; break;
		case PM_GRP_PKGNAMES: data = grp->packages; break;
		default:
			data = NULL;
		break;
	}

	return(data);
}
/** @} */

/** @defgroup alpm_sync Sync Functions
 * @{
 */

/** Get informations about a sync.
 * @param sync package pointer
 * @param parm name of the info to get
 * @return a void* on success (the value), NULL on error
 */
void *alpm_sync_getinfo(pmsyncpkg_t *sync, unsigned char parm)
{
	void *data;

	/* Sanity checks */
	ASSERT(sync != NULL, return(NULL));

	switch(parm) {
		case PM_SYNC_TYPE: data = (void *)(int)sync->type; break;
		case PM_SYNC_PKG:  data = sync->pkg; break;
		case PM_SYNC_DATA: data = sync->data; break;
		default:
			data = NULL;
		break;
	}

	return(data);
}
/** @} */

/** @defgroup alpm_trans Transaction Functions
 * @{
 */

/** Get informations about the transaction.
 * @param parm name of the info to get
 * @return a void* on success (the value), NULL on error
 */
void *alpm_trans_getinfo(unsigned char parm)
{
	pmtrans_t *trans;
	void *data;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(handle->trans != NULL, return(NULL));

	trans = handle->trans;

	switch(parm) {
		case PM_TRANS_TYPE:     data = (void *)(int)trans->type; break;
		case PM_TRANS_FLAGS:    data = (void *)(int)trans->flags; break;
		case PM_TRANS_TARGETS:  data = trans->targets; break;
		case PM_TRANS_PACKAGES: data = trans->packages; break;
		default:
			data = NULL;
		break;
	}

	return(data);
}

/** Initialize the transaction.
 * @param type type of the transaction
 * @param flags flags of the transaction (like nodeps, etc)
 * @param event event callback function pointer
 * @param conv conversation callback function pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_init(unsigned char type, unsigned char flags, alpm_trans_cb_event event, alpm_trans_cb_conv conv)
{
	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
	ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));

	/* ORE
	 * perform sanity checks on type and flags:
	 * for instance, we can't set UPGRADE and FRESHEN at the same time */

	handle->trans = trans_new();
	if(handle->trans == NULL) {
		RET_ERR(PM_ERR_MEMORY, -1);
	}

	return(trans_init(handle->trans, type, flags, event, conv));
}

/** Search for packages to upgrade and add them to the transaction.
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_sysupgrade()
{
	pmtrans_t *trans;

	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	trans = handle->trans;
	ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
	ASSERT(trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_XXX, -1));

	return(trans_sysupgrade(trans));
}

/** Add a target to the transaction.
 * @param target the name of the target to add
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_addtarget(char *target)
{
	pmtrans_t *trans;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
	ASSERT(target != NULL && strlen(target) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1));

	trans = handle->trans;
	ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));

	return(trans_addtarget(trans, target));
}

/** Prepare a transaction.
 * @param data the address of a PM_LIST where detailed description
 * of an error can be dumped (ie. list of conflicting files)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_prepare(PMList **data)
{
	pmtrans_t *trans;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	trans = handle->trans;
	ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));

	return(trans_prepare(handle->trans, data));
}

/** Commit a transaction.
 * @param data the address of a PM_LIST where detailed description
 * of an error can be dumped (ie. list of conflicting files)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_commit(PMList **data)
{
	pmtrans_t *trans;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	trans = handle->trans;
	ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(trans->state == STATE_PREPARED, RET_ERR(PM_ERR_TRANS_NOT_PREPARED, -1));

	/* Check for database R/W permission */
	ASSERT(handle->access == PM_ACCESS_RW, RET_ERR(PM_ERR_BADPERMS, -1));

	return(trans_commit(handle->trans, data));
}

/** Release a transaction.
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_release()
{
	pmtrans_t *trans;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	trans = handle->trans;
	ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(trans->state != STATE_IDLE, RET_ERR(PM_ERR_TRANS_NULL, -1));

	FREETRANS(handle->trans);

	return(0);
}
/** @} */

/** @defgroup alpm_dep Dependency Functions
 * @{
 */

void *alpm_dep_getinfo(pmdepmissing_t *miss, unsigned char parm)
{
	void *data;

	/* Sanity checks */
	ASSERT(miss != NULL, return(NULL));

	switch(parm) {
		case PM_DEP_TARGET:  data = (void *)(int)miss->target; break;
		case PM_DEP_TYPE:    data = (void *)(int)miss->type; break;
		case PM_DEP_MOD:     data = (void *)(int)miss->depend.mod; break;
		case PM_DEP_NAME:    data = miss->depend.name; break;
		case PM_DEP_VERSION: data = miss->depend.version; break;
		default:
			data = NULL;
		break;
	}

	return(data);
}
/** @} */

/** @defgroup alpm_log Logging Functions
 * @{
 */

int alpm_logaction(char *fmt, ...)
{
	char str[LOG_STR_LEN];
	va_list args;

	/* Sanity checks */
	ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));

	va_start(args, fmt);
	vsnprintf(str, LOG_STR_LEN, fmt, args);
	va_end(args);

	/* ORE
	We should add a prefix to log strings depending on who called us.
	If logaction was called by the frontend:
		USER: <the frontend log>
	and if called internally:
		ALPM: <the library log>
	Moreover, the frontend should be able to choose its prefix (USER by default?):
		pacman: "PACMAN"
		kpacman: "KPACMAN"
		...
	It allows to share the log file between several frontends and to actually 
	know who does what */

	return(_alpm_logaction(handle->usesyslog, handle->logfd, str));
}
/** @} */

/** @defgroup alpm_list List Manipulation Functions
 * @{
 */

PMList *alpm_list_first(PMList *list)
{
	return(list);
}

PMList *alpm_list_next(PMList *entry)
{
	ASSERT(entry != NULL, return(NULL));

	return(entry->next);
}

void *alpm_list_getdata(PMList *entry)
{
	ASSERT(entry != NULL, return(NULL));

	return(entry->data);
}

int alpm_list_free(PMList *entry)
{
	ASSERT(entry != NULL, return(-1));

	FREELIST(entry);

	return(0);
}

int alpm_list_count(PMList *list)
{
	return(_alpm_list_count(list));
}
/** @} */

/** @defgroup alpm_misc Miscellaneous Functions
 * @{
 */

char *alpm_get_md5sum(char *name)
{
	ASSERT(name != NULL, return(NULL));

	return(MDFile(name));
}
/* @} */

/* vim: set ts=2 sw=2 noet: */