summaryrefslogtreecommitdiff
path: root/lib/libalpm/db.c
blob: a32263357188f6e1f8bc4edbe875b9f3e23c1f03 (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
/*
 *  db.c
 * 
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 *  Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
 *  Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
 *  Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
 *  Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.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 "config.h"

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#if defined(__APPLE__) || defined(__OpenBSD__)
#include <sys/syslimits.h>
#include <sys/stat.h>
#endif
#include <dirent.h>
#include <regex.h>
#ifdef CYGWIN
#include <limits.h> /* PATH_MAX */
#endif

/* libalpm */
#include "db.h"
#include "alpm_list.h"
#include "log.h"
#include "util.h"
#include "error.h"
#include "server.h"
#include "provide.h"
#include "handle.h"
#include "cache.h"
#include "alpm.h"

#include "sync.h" /* alpm_db_get_upgrades() */

/** \addtogroup alpm_databases Database Functions
 * @brief Functions to query and manipulate the database of libalpm
 * @{
 */

/** Register a package database
 * @param treename the name of the repository
 * @return a pmdb_t* on success (the value), NULL on error
 */
pmdb_t SYMEXPORT *alpm_db_register(char *treename)
{
	ALPM_LOG_FUNC;

	/* 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));

	return(_alpm_db_register(treename, NULL));
}

/** 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;

	ALPM_LOG_FUNC;

	/* 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) {
		handle->db_local = NULL;
		found = 1;
	} else {
		void *data;
		handle->dbs_sync = alpm_list_remove(handle->dbs_sync, db, _alpm_db_cmp, &data);
		if(data) {
			found = 1;
		}
	}

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

	_alpm_log(PM_LOG_DEBUG, _("unregistering database '%s'"), db->treename);

	/* Cleanup */
	_alpm_db_free_pkgcache(db);

	_alpm_log(PM_LOG_DEBUG, _("closing database '%s'"), db->treename);
	_alpm_db_close(db);

	_alpm_db_free(db);

	return(0);
}

/** Set the serverlist of a database.
 * @param db database pointer
 * @param url url of the server
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_db_setserver(pmdb_t *db, const char *url)
{
	int found = 0;

	ALPM_LOG_FUNC;

	/* Sanity checks */
	ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));

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

	if(url && strlen(url)) {
		pmserver_t *server;
		if((server = _alpm_server_new(url)) == NULL) {
			/* pm_errno is set by _alpm_server_new */
			return(-1);
		}
		db->servers = alpm_list_add(db->servers, server);
		_alpm_log(PM_LOG_DEBUG, _("adding new server to database '%s': protocol '%s', server '%s', path '%s'"),
							db->treename, server->s_url->scheme, server->s_url->host, server->s_url->doc);
	} else {
		FREELIST(db->servers);
		_alpm_log(PM_LOG_DEBUG, _("serverlist flushed for '%s'"), db->treename);
	}

	return(0);
}

/** Update a package database
 * @param force if true, then forces the update, otherwise update only in case
 * the database isn't up to date
 * @param db pointer to the package database to update
 * @return 0 on success, > 0 on error (pm_errno is set accordingly), < 0 if up
 * to date
 */
int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
{
	alpm_list_t *lp;
	char path[PATH_MAX];
	alpm_list_t *files = NULL;
	char newmtime[16] = "";
	char lastupdate[16] = "";
	const char *dbpath;
	int ret;

	ALPM_LOG_FUNC;

	/* 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));
	/* Verify we are in a transaction.  This is done _mainly_ because we need a DB
	 * lock - if we update without a db lock, we may kludge some other pacman
	 * process that _has_ a lock.
	 */
	ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
	ASSERT(handle->trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
	ASSERT(handle->trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_TRANS_TYPE, -1));

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

	if(!force) {
		/* get the lastupdate time */
		_alpm_db_getlastupdate(db, lastupdate);
		if(strlen(lastupdate) == 0) {
			_alpm_log(PM_LOG_DEBUG, _("failed to get lastupdate time for %s (no big deal)"), db->treename);
		}
	}

	/* build a one-element list */
	snprintf(path, PATH_MAX, "%s" DBEXT, db->treename);
	files = alpm_list_add(files, strdup(path));

	dbpath = alpm_option_get_dbpath();

	ret = _alpm_downloadfiles_forreal(db->servers, dbpath, files, lastupdate, newmtime);
	FREELIST(files);
	if(ret == 1) {
		/* mtimes match, do nothing */
		pm_errno = 0;
		return(1);
	} else if(ret == -1) {
		/* we use downloadLastErrString and downloadLastErrCode here, error returns from
		 * libdownload */
		_alpm_log(PM_LOG_DEBUG, _("failed to sync db: %s [%d]"), downloadLastErrString, downloadLastErrCode);
		RET_ERR(PM_ERR_DB_SYNC, -1);
	} else {
		if(strlen(newmtime)) {
			_alpm_log(PM_LOG_DEBUG, _("sync: new mtime for %s: %s"), db->treename, newmtime);
			_alpm_db_setlastupdate(db, newmtime);
		}
		snprintf(path, PATH_MAX, "%s%s" DBEXT, dbpath, db->treename);

		/* remove the old dir */
		_alpm_log(PM_LOG_DEBUG, _("flushing database %s%s"), db->path);
		for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) {
			pmpkg_t *pkg = lp->data;
			if(pkg && _alpm_db_remove(db, pkg) == -1) {
				_alpm_log(PM_LOG_ERROR, _("could not remove database entry %s%s"), db->treename,
									alpm_pkg_get_name(pkg));
				RET_ERR(PM_ERR_DB_REMOVE, -1);
			}
		}

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

		/* uncompress the sync database */
		if(_alpm_db_install(db, path) == -1) {
			return -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 SYMEXPORT *alpm_db_get_pkg(pmdb_t *db, const char *name)
{
	ALPM_LOG_FUNC;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));
	ASSERT(name != NULL && strlen(name) != 0, return(NULL));

	return(_alpm_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
 */
alpm_list_t SYMEXPORT *alpm_db_getpkgcache(pmdb_t *db)
{
	ALPM_LOG_FUNC;

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

	return(_alpm_db_get_pkgcache(db));
}

/** Get the list of packages that a package provides
 * @param db pointer to the package database to get the package from
 * @param name name of the package
 * @return the list of packages on success, NULL on error
 */
alpm_list_t SYMEXPORT *alpm_db_whatprovides(pmdb_t *db, const char *name)
{
	ALPM_LOG_FUNC;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));
	ASSERT(name != NULL && strlen(name) != 0, return(NULL));

	return(_alpm_db_whatprovides(db, name));
}

/** 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 SYMEXPORT *alpm_db_readgrp(pmdb_t *db, const char *name)
{
	ALPM_LOG_FUNC;

	/* Sanity checks */
	ASSERT(handle != NULL, return(NULL));
	ASSERT(db != NULL, return(NULL));
	ASSERT(name != NULL && strlen(name) != 0, return(NULL));

	return(_alpm_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
 */
alpm_list_t SYMEXPORT *alpm_db_getgrpcache(pmdb_t *db)
{
	ALPM_LOG_FUNC;

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

	return(_alpm_db_get_grpcache(db));
}

/** Searches a database
 * @param db pointer to the package database to search in
 * @param needles the list of strings to search for
 * @return the list of packages on success, NULL on error
 */
alpm_list_t SYMEXPORT *alpm_db_search(pmdb_t *db, alpm_list_t* needles)
{
	ALPM_LOG_FUNC;

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

	return(_alpm_db_search(db, needles));
}

/* This function is mostly the same as sync.c find_replacements and sysupgrade
 * functions, and we should be able to combine them - this is an interim
 * solution made for -Qu operation */
alpm_list_t SYMEXPORT *alpm_db_get_upgrades()
{
	alpm_list_t *syncpkgs = NULL;
	alpm_list_t *i, *j, *k, *m;

	ALPM_LOG_FUNC;

	/* TODO holy nested loops, Batman! */
	/* check for "recommended" package replacements */
	_alpm_log(PM_LOG_DEBUG, _("checking for package replacements"));
	for(i = handle->dbs_sync; i; i = i->next) {
		for(j = _alpm_db_get_pkgcache(i->data); j; j = j->next) {
			pmpkg_t *spkg = j->data;

			for(k = alpm_pkg_get_replaces(spkg); k; k = k->next) {

				for(m = _alpm_db_get_pkgcache(handle->db_local); m; m = m->next) {
					pmpkg_t *lpkg = m->data;

					if(strcmp(k->data, alpm_pkg_get_name(lpkg)) == 0) {
						_alpm_log(PM_LOG_DEBUG, _("checking replacement '%s' for package '%s'"), k->data,
											alpm_pkg_get_name(spkg));
						if(alpm_list_find_str(handle->ignorepkg, alpm_pkg_get_name(lpkg))) {
							_alpm_log(PM_LOG_WARNING, _("%s-%s: ignoring package upgrade (to be replaced by %s-%s)"),
												alpm_pkg_get_name(lpkg), alpm_pkg_get_version(lpkg),
												alpm_pkg_get_name(spkg), alpm_pkg_get_version(spkg));
						} else {
							/* assume all replaces=() packages are accepted */
							pmsyncpkg_t *sync = NULL;
							pmpkg_t *dummy = _alpm_pkg_new(alpm_pkg_get_name(lpkg), NULL);
							if(dummy == NULL) {
								pm_errno = PM_ERR_MEMORY;
								goto error;
							}
							dummy->requiredby = alpm_list_strdup(alpm_pkg_get_requiredby(lpkg));

							pmsyncpkg_t *syncpkg;
							syncpkg = _alpm_sync_find(syncpkgs, alpm_pkg_get_name(spkg));

							if(syncpkg) {
								/* found it -- just append to the replaces list */
								sync->data = alpm_list_add(sync->data, dummy);
							} else {
								/* none found -- enter pkg into the final sync list */
								sync = _alpm_sync_new(PM_SYNC_TYPE_REPLACE, spkg, NULL);
								if(sync == NULL) {
									_alpm_pkg_free(dummy);
									pm_errno = PM_ERR_MEMORY;
									goto error;
								}
								sync->data = alpm_list_add(NULL, dummy);
								syncpkgs = alpm_list_add(syncpkgs, sync);
							}
							_alpm_log(PM_LOG_DEBUG, _("%s-%s elected for upgrade (to be replaced by %s-%s)"),
												alpm_pkg_get_name(lpkg), alpm_pkg_get_version(lpkg),
												alpm_pkg_get_name(spkg), alpm_pkg_get_version(spkg));
						}
						break;
					}
				}
			}
		}
	}

	/* now do normal upgrades */
	for(i = _alpm_db_get_pkgcache(handle->db_local); i; i = i->next) {
		int replace=0;
		pmpkg_t *local = i->data;
		pmpkg_t *spkg = NULL;
		pmsyncpkg_t *sync;

		for(j = handle->dbs_sync; !spkg && j; j = j->next) {
			spkg = _alpm_db_get_pkgfromcache(j->data, alpm_pkg_get_name(local));
		}
		if(spkg == NULL) {
			_alpm_log(PM_LOG_DEBUG, _("'%s' not found in sync db -- skipping"), alpm_pkg_get_name(local));
			continue;
		}

		/* we don't care about a to-be-replaced package's newer version */
		for(j = syncpkgs; j && !replace; j=j->next) {
			sync = j->data;
			if(sync->type == PM_SYNC_TYPE_REPLACE) {
				if(_alpm_pkg_find(alpm_pkg_get_name(spkg), sync->data)) {
					replace=1;
				}
			}
		}
		if(replace) {
			_alpm_log(PM_LOG_DEBUG, _("'%s' is already elected for removal -- skipping"),
								alpm_pkg_get_name(local));
			continue;
		}

		if(alpm_pkg_compare_versions(local, spkg)) {
			_alpm_log(PM_LOG_DEBUG, _("%s elected for upgrade (%s => %s)"),
								alpm_pkg_get_name(local), alpm_pkg_get_version(local),
								alpm_pkg_get_version(spkg));

			pmsyncpkg_t *syncpkg;
			syncpkg	= _alpm_sync_find(syncpkgs, alpm_pkg_get_name(local));

			if(!syncpkg) {
				pmpkg_t *dummy = _alpm_pkg_new(alpm_pkg_get_name(local),
																			 alpm_pkg_get_version(local));
				if(dummy == NULL) {
					goto error;
				}
				sync = _alpm_sync_new(PM_SYNC_TYPE_UPGRADE, spkg, dummy);
				if(sync == NULL) {
					_alpm_pkg_free(dummy);
					goto error;
				}
				syncpkgs = alpm_list_add(syncpkgs, sync);
			}
		}
	}

	return(syncpkgs);
error:
	if(syncpkgs) {
		alpm_list_t *tmp;
		for(tmp = syncpkgs; tmp; tmp = alpm_list_next(tmp)) {
			if(tmp->data) {
				_alpm_sync_free(tmp->data);
			}
		}
		alpm_list_free(syncpkgs);
	}
	return(NULL);
}

/** @} */

pmdb_t *_alpm_db_new(const char *dbpath, const char *treename)
{
	pmdb_t *db;
	const size_t pathsize = strlen(dbpath) + strlen(treename) + 2;

	ALPM_LOG_FUNC;

	db = calloc(1, sizeof(pmdb_t));
	if(db == NULL) {
		_alpm_log(PM_LOG_ERROR, _("malloc failed: could not allocate %d bytes"),
				  sizeof(pmdb_t));
		RET_ERR(PM_ERR_MEMORY, NULL);
	}

	db->path = calloc(1, pathsize);
	if(db->path == NULL) {
		_alpm_log(PM_LOG_ERROR, _("malloc failed: could not allocate %d bytes"),
				  pathsize);
		FREE(db);
		RET_ERR(PM_ERR_MEMORY, NULL);
	}
	sprintf(db->path, "%s%s/", dbpath, treename);

	strncpy(db->treename, treename, PATH_MAX);

	return(db);
}

void _alpm_db_free(pmdb_t *db)
{
	ALPM_LOG_FUNC;

	alpm_list_t *tmp;
	for(tmp = db->servers; tmp; tmp = alpm_list_next(tmp)) {
		_alpm_server_free(tmp->data);
	}
	FREE(db->path);
	FREE(db);

	return;
}

int _alpm_db_cmp(const void *db1, const void *db2)
{
	ALPM_LOG_FUNC;
	return(strcmp(((pmdb_t *)db1)->treename, ((pmdb_t *)db2)->treename));
}

alpm_list_t *_alpm_db_search(pmdb_t *db, alpm_list_t *needles)
{
	alpm_list_t *i, *j, *k, *ret = NULL;

	ALPM_LOG_FUNC;

	for(i = needles; i; i = i->next) {
		char *targ;
		regex_t reg;

		if(i->data == NULL) {
			continue;
		}
		targ = i->data;
		_alpm_log(PM_LOG_DEBUG, "searching for target '%s'", targ);
		
		if(regcomp(&reg, targ, REG_EXTENDED | REG_NOSUB | REG_ICASE | REG_NEWLINE) != 0) {
			RET_ERR(PM_ERR_INVALID_REGEX, NULL);
		}

		for(j = _alpm_db_get_pkgcache(db); j; j = j->next) {
			pmpkg_t *pkg = j->data;
			const char *matched = NULL;

			/* check name */
			if (regexec(&reg, alpm_pkg_get_name(pkg), 0, 0, 0) == 0) {
				matched = alpm_pkg_get_name(pkg);
			}
			/* check desc */
			else if (regexec(&reg, alpm_pkg_get_desc(pkg), 0, 0, 0) == 0) {
				matched = alpm_pkg_get_desc(pkg);
			}
			/* check provides */
			/* TODO: should we be doing this, and should we print something
			 * differently when we do match it since it isn't currently printed? */
			else {
				for(k = alpm_pkg_get_provides(pkg); k; k = k->next) {
					if (regexec(&reg, k->data, 0, 0, 0) == 0) {
						matched = k->data;
						break;
					}
				}
			}

			if(matched != NULL) {
				_alpm_log(PM_LOG_DEBUG, "    search target '%s' matched '%s'",
				          targ, matched);
				ret = alpm_list_add(ret, pkg);
			}
		}

		regfree(&reg);
	}

	return(ret);
}

pmdb_t *_alpm_db_register(const char *treename, alpm_cb_db_register callback)
{
	struct stat buf;
	pmdb_t *db;
	const char *dbpath;
	char path[PATH_MAX];

	ALPM_LOG_FUNC;

	if(strcmp(treename, "local") == 0) {
		if(handle->db_local != NULL) {
			_alpm_log(PM_LOG_WARNING, _("attempt to re-register the 'local' DB"));
			RET_ERR(PM_ERR_DB_NOT_NULL, NULL);
		}
	} else {
		alpm_list_t *i;
		for(i = handle->dbs_sync; i; i = i->next) {
			pmdb_t *sdb = i->data;
			if(strcmp(treename, sdb->treename) == 0) {
				_alpm_log(PM_LOG_DEBUG, _("attempt to re-register the '%s' database, using existing"), sdb->treename);
				return sdb;
			}
		}
	}
	
	_alpm_log(PM_LOG_DEBUG, _("registering database '%s'"), treename);

	/* make sure the database directory exists */
	dbpath = alpm_option_get_dbpath();
	snprintf(path, PATH_MAX, "%s%s", dbpath, treename);
	if(stat(path, &buf) != 0 || !S_ISDIR(buf.st_mode)) {
		_alpm_log(PM_LOG_DEBUG, _("database directory '%s' does not exist, creating it"),
				path);
		if(_alpm_makepath(path) != 0) {
			RET_ERR(PM_ERR_SYSTEM, NULL);
		}
	}

	db = _alpm_db_new(handle->dbpath, treename);
	if(db == NULL) {
		RET_ERR(PM_ERR_DB_CREATE, NULL);
	}

	_alpm_log(PM_LOG_DEBUG, _("opening database '%s'"), db->treename);
	if(_alpm_db_open(db) == -1) {
		_alpm_db_free(db);
		RET_ERR(PM_ERR_DB_OPEN, NULL);
	}

	/* Only call callback on NEW registration. */
	if(callback) callback(treename, db);

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

	return(db);
}

const char SYMEXPORT *alpm_db_get_name(pmdb_t *db)
{
	ALPM_LOG_FUNC;

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

	return db->treename;
}

const char *alpm_db_get_url(pmdb_t *db)
{
	char path[PATH_MAX];
	pmserver_t *s;

	ALPM_LOG_FUNC;

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

	s = (pmserver_t*)db->servers->data;

	snprintf(path, PATH_MAX, "%s://%s%s", s->s_url->scheme, s->s_url->host, s->s_url->doc);
	return strdup(path);
}

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