summaryrefslogtreecommitdiffstats
path: root/lib/libalpm/alpm.h
blob: 8a7979f26552fa3e1e35da5f4230e460098a4f6a (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
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
/*
 * alpm.h
 *
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *  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) 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, see <http://www.gnu.org/licenses/>.
 */
#ifndef _ALPM_H
#define _ALPM_H

#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h> /* for off_t */
#include <time.h> /* for time_t */
#include <stdarg.h> /* for va_list */

#include <alpm_list.h>

#define DEPRECATED __attribute__((deprecated))

/*
 * Arch Linux Package Management library
 */

/** @addtogroup alpm_api Public API
 * The libalpm Public API
 * @{
 */

/*
 * Enumerations
 * These ones are used in multiple contexts, so are forward-declared.
 */

/**
 * Install reasons.
 * Why the package was installed.
 */
typedef enum _alpm_pkgreason_t {
	/** Explicitly requested by the user. */
	PM_PKG_REASON_EXPLICIT = 0,
	/** Installed as a dependency for another package. */
	PM_PKG_REASON_DEPEND = 1
} alpm_pkgreason_t;

/** Types of version constraints in dependency specs. */
typedef enum _alpm_depmod_t {
  /** No version constraint */
	PM_DEP_MOD_ANY = 1,
  /** Test version equality (package=x.y.z) */
	PM_DEP_MOD_EQ,
  /** Test for at least a version (package>=x.y.z) */
	PM_DEP_MOD_GE,
  /** Test for at most a version (package<=x.y.z) */
	PM_DEP_MOD_LE,
  /** Test for greater than some version (package>x.y.z) */
	PM_DEP_MOD_GT,
  /** Test for less than some version (package<x.y.z) */
	PM_DEP_MOD_LT
} alpm_depmod_t;

/**
 * File conflict type.
 * Whether the conflict results from a file existing on the filesystem, or with
 * another target in the transaction.
 */
typedef enum _alpm_fileconflicttype_t {
	PM_FILECONFLICT_TARGET = 1,
	PM_FILECONFLICT_FILESYSTEM
} alpm_fileconflicttype_t;

/**
 * GPG signature verification options
 */
typedef enum _pgp_verify_t {
	PM_PGP_VERIFY_UNKNOWN,
	PM_PGP_VERIFY_NEVER,
	PM_PGP_VERIFY_OPTIONAL,
	PM_PGP_VERIFY_ALWAYS
} pgp_verify_t;

/*
 * Structures
 */

typedef struct __pmhandle_t pmhandle_t;
typedef struct __pmdb_t pmdb_t;
typedef struct __pmpkg_t pmpkg_t;
typedef struct __pmtrans_t pmtrans_t;

/** Dependency */
typedef struct _pmdepend_t {
	char *name;
	char *version;
	unsigned long name_hash;
	alpm_depmod_t mod;
} pmdepend_t;

/** Missing dependency */
typedef struct _pmdepmissing_t {
	char *target;
	pmdepend_t *depend;
	/* this is used in case of remove dependency error only */
	char *causingpkg;
} pmdepmissing_t;

/** Conflict */
typedef struct _pmconflict_t {
	char *package1;
	char *package2;
	char *reason;
} pmconflict_t;

/** File conflict */
typedef struct _pmfileconflict_t {
	char *target;
	alpm_fileconflicttype_t type;
	char *file;
	char *ctarget;
} pmfileconflict_t;

/** Package group */
typedef struct _pmgrp_t {
	/** group name */
	char *name;
	/** list of pmpkg_t packages */
	alpm_list_t *packages;
} pmgrp_t;

/** Package upgrade delta */
typedef struct _pmdelta_t {
	/** filename of the delta patch */
	char *delta;
	/** md5sum of the delta file */
	char *delta_md5;
	/** filename of the 'before' file */
	char *from;
	/** filename of the 'after' file */
	char *to;
	/** filesize of the delta file */
	off_t delta_size;
	/** download filesize of the delta file */
	off_t download_size;
} pmdelta_t;

/** Local package or package file backup entry */
typedef struct _pmbackup_t {
	char *name;
	char *hash;
} pmbackup_t;

/*
 * Logging facilities
 */

/**
 * Logging Levels
 */
typedef enum _pmloglevel_t {
	PM_LOG_ERROR    = 1,
	PM_LOG_WARNING  = (1 << 1),
	PM_LOG_DEBUG    = (1 << 2),
	PM_LOG_FUNCTION = (1 << 3)
} pmloglevel_t;

typedef void (*alpm_cb_log)(pmloglevel_t, const char *, va_list);
int alpm_logaction(pmhandle_t *handle, const char *fmt, ...);

/*
 * Downloading
 */

/** Type of download progress callbacks.
 * @param filename the name of the file being downloaded
 * @param xfered the number of transferred bytes
 * @param total the total number of bytes to transfer
 */
typedef void (*alpm_cb_download)(const char *filename,
		off_t xfered, off_t total);

typedef void (*alpm_cb_totaldl)(off_t total);

/** A callback for downloading files
 * @param url the URL of the file to be downloaded
 * @param localpath the directory to which the file should be downloaded
 * @param force whether to force an update, even if the file is the same
 * @return 0 on success, 1 if the file exists and is identical, -1 on
 * error.
 */
typedef int (*alpm_cb_fetch)(const char *url, const char *localpath,
		int force);

/** Fetch a remote pkg.
 * @param handle the context handle
 * @param url URL of the package to download
 * @return the downloaded filepath on success, NULL on error
 */
char *alpm_fetch_pkgurl(pmhandle_t *handle, const char *url);

/** @addtogroup alpm_api_options Options
 * Libalpm option getters and setters
 * @{
 */

/** Returns the callback used for logging. */
alpm_cb_log alpm_option_get_logcb(pmhandle_t *handle);
/** Sets the callback used for logging. */
int alpm_option_set_logcb(pmhandle_t *handle, alpm_cb_log cb);

/** Returns the callback used to report download progress. */
alpm_cb_download alpm_option_get_dlcb(pmhandle_t *handle);
/** Sets the callback used to report download progress. */
int alpm_option_set_dlcb(pmhandle_t *handle, alpm_cb_download cb);

/** Returns the downloading callback. */
alpm_cb_fetch alpm_option_get_fetchcb(pmhandle_t *handle);
/** Sets the downloading callback. */
int alpm_option_set_fetchcb(pmhandle_t *handle, alpm_cb_fetch cb);

/** Returns the callback used to report total download size. */
alpm_cb_totaldl alpm_option_get_totaldlcb(pmhandle_t *handle);
/** Sets the callback used to report total download size. */
int alpm_option_set_totaldlcb(pmhandle_t *handle, alpm_cb_totaldl cb);

/** Returns the root of the destination filesystem. Read-only. */
const char *alpm_option_get_root(pmhandle_t *handle);

/** Returns the path to the database directory. Read-only. */
const char *alpm_option_get_dbpath(pmhandle_t *handle);

/** Get the name of the database lock file. Read-only. */
const char *alpm_option_get_lockfile(pmhandle_t *handle);

/** @name Accessors to the list of package cache directories.
 * @{
 */
alpm_list_t *alpm_option_get_cachedirs(pmhandle_t *handle);
int alpm_option_set_cachedirs(pmhandle_t *handle, alpm_list_t *cachedirs);
int alpm_option_add_cachedir(pmhandle_t *handle, const char *cachedir);
int alpm_option_remove_cachedir(pmhandle_t *handle, const char *cachedir);
/** @} */

/** Returns the logfile name. */
const char *alpm_option_get_logfile(pmhandle_t *handle);
/** Sets the logfile name. */
int alpm_option_set_logfile(pmhandle_t *handle, const char *logfile);

/** Returns the path to libalpm's GnuPG home directory. */
const char *alpm_option_get_gpgdir(pmhandle_t *handle);
/** Sets the path to libalpm's GnuPG home directory. */
int alpm_option_set_gpgdir(pmhandle_t *handle, const char *gpgdir);

/** Returns whether to use syslog (0 is FALSE, TRUE otherwise). */
int alpm_option_get_usesyslog(pmhandle_t *handle);
/** Sets whether to use syslog (0 is FALSE, TRUE otherwise). */
int alpm_option_set_usesyslog(pmhandle_t *handle, int usesyslog);

/** @name Accessors to the list of no-upgrade files.
 * These functions modify the list of files which should
 * not be updated by package installation.
 * @{
 */
alpm_list_t *alpm_option_get_noupgrades(pmhandle_t *handle);
int alpm_option_add_noupgrade(pmhandle_t *handle, const char *pkg);
int alpm_option_set_noupgrades(pmhandle_t *handle, alpm_list_t *noupgrade);
int alpm_option_remove_noupgrade(pmhandle_t *handle, const char *pkg);
/** @} */

/** @name Accessors to the list of no-extract files.
 * These functions modify the list of filenames which should
 * be skipped packages which should
 * not be upgraded by a sysupgrade operation.
 * @{
 */
alpm_list_t *alpm_option_get_noextracts(pmhandle_t *handle);
int alpm_option_add_noextract(pmhandle_t *handle, const char *pkg);
int alpm_option_set_noextracts(pmhandle_t *handle, alpm_list_t *noextract);
int alpm_option_remove_noextract(pmhandle_t *handle, const char *pkg);
/** @} */

/** @name Accessors to the list of ignored packages.
 * These functions modify the list of packages that
 * should be ignored by a sysupgrade.
 * @{
 */
alpm_list_t *alpm_option_get_ignorepkgs(pmhandle_t *handle);
int alpm_option_add_ignorepkg(pmhandle_t *handle, const char *pkg);
int alpm_option_set_ignorepkgs(pmhandle_t *handle, alpm_list_t *ignorepkgs);
int alpm_option_remove_ignorepkg(pmhandle_t *handle, const char *pkg);
/** @} */

/** @name Accessors to the list of ignored groups.
 * These functions modify the list of groups whose packages
 * should be ignored by a sysupgrade.
 * @{
 */
alpm_list_t *alpm_option_get_ignoregrps(pmhandle_t *handle);
int alpm_option_add_ignoregrp(pmhandle_t *handle, const char *grp);
int alpm_option_set_ignoregrps(pmhandle_t *handle, alpm_list_t *ignoregrps);
int alpm_option_remove_ignoregrp(pmhandle_t *handle, const char *grp);
/** @} */

/** Returns the targeted architecture. */
const char *alpm_option_get_arch(pmhandle_t *handle);
/** Sets the targeted architecture. */
int alpm_option_set_arch(pmhandle_t *handle, const char *arch);

int alpm_option_get_usedelta(pmhandle_t *handle);
int alpm_option_set_usedelta(pmhandle_t *handle, int usedelta);

int alpm_option_get_checkspace(pmhandle_t *handle);
int alpm_option_set_checkspace(pmhandle_t *handle, int checkspace);

pgp_verify_t alpm_option_get_default_sigverify(pmhandle_t *handle);
int alpm_option_set_default_sigverify(pmhandle_t *handle, pgp_verify_t level);

/** @} */

/** @addtogroup alpm_api_databases Database Functions
 * Functions to query and manipulate the database of libalpm.
 * @{
 */

/** Get the database of locally installed packages.
 * The returned pointer points to an internal structure
 * of libalpm which should only be manipulated through
 * libalpm functions.
 * @return a reference to the local database
 */
pmdb_t *alpm_option_get_localdb(pmhandle_t *handle);

/** Get the list of sync databases.
 * Returns a list of pmdb_t structures, one for each registered
 * sync database.
 * @param handle the context handle
 * @return a reference to an internal list of pmdb_t structures
 */
alpm_list_t *alpm_option_get_syncdbs(pmhandle_t *handle);

/** Register a sync database of packages.
 * @param handle the context handle
 * @param treename the name of the sync repository
 * @param check_sig what level of signature checking to perform on the
 * database; note that this must be a '.sig' file type verification
 * @return a pmdb_t* on success (the value), NULL on error
 */
pmdb_t *alpm_db_register_sync(pmhandle_t *handle, const char *treename,
		pgp_verify_t check_sig);

/** 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);

/** Unregister all package databases.
 * @param handle the context handle
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_db_unregister_all(pmhandle_t *handle);

/** Get the name of a package database.
 * @param db pointer to the package database
 * @return the name of the package database, NULL on error
 */
const char *alpm_db_get_name(const pmdb_t *db);

/** @name Accessors to the list of servers for a database.
 * @{
 */
alpm_list_t *alpm_db_get_servers(const pmdb_t *db);
int alpm_db_set_servers(pmdb_t *db, alpm_list_t *servers);
int alpm_db_add_server(pmdb_t *db, const char *url);
int alpm_db_remove_server(pmdb_t *db, const char *url);
/** @} */

int alpm_db_update(int level, pmdb_t *db);

/** 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_get_pkg(pmdb_t *db, const char *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 *alpm_db_get_pkgcache(pmdb_t *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, const char *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 *alpm_db_get_grpcache(pmdb_t *db);

/** Searches a database with regular expressions.
 * @param db pointer to the package database to search in
 * @param needles a list of regular expressions to search for
 * @return the list of packages matching all regular expressions on success, NULL on error
 */
alpm_list_t *alpm_db_search(pmdb_t *db, const alpm_list_t* needles);

/** Set install reason for a package in db.
 * @param db pointer to the package database
 * @param name the name of the package
 * @param reason the new install reason
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_db_set_pkgreason(pmdb_t *db, const char *name, alpm_pkgreason_t reason);

/** @} */

/** @addtogroup alpm_api_packages Package Functions
 * Functions to manipulate libalpm packages
 * @{
 */

/** Create a package from a file.
 * If full is false, the archive is read only until all necessary
 * metadata is found. If it is true, the entire archive is read, which
 * serves as a verification of integrity and the filelist can be created.
 * The allocated structure should be freed using alpm_pkg_free().
 * @param handle the context handle
 * @param filename location of the package tarball
 * @param full whether to stop the load after metadata is read or continue
 * through the full archive
 * @param check_sig what level of package signature checking to perform on the
 * package; note that this must be a '.sig' file type verification
 * @param pkg address of the package pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_pkg_load(pmhandle_t *handle, const char *filename, int full,
		pgp_verify_t check_sig, pmpkg_t **pkg);

/** 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);

/** Check the integrity (with md5) of a package from the sync cache.
 * @param pkg package pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_pkg_checkmd5sum(pmpkg_t *pkg);

/** Compare two version strings and determine which one is 'newer'. */
int alpm_pkg_vercmp(const char *a, const char *b);

/** Computes the list of packages requiring a given package.
 * The return value of this function is a newly allocated
 * list of package names (char*), it should be freed by the caller.
 * @param pkg a package
 * @return the list of packages requiring pkg
 */
alpm_list_t *alpm_pkg_compute_requiredby(pmpkg_t *pkg);

/** @name Package Property Accessors
 * Any pointer returned by these functions points to internal structures
 * allocated by libalpm. They should not be freed nor modified in any
 * way.
 * @{
 */

/** Gets the name of the file from which the package was loaded.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_filename(pmpkg_t *pkg);

/** Returns the package name.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_name(pmpkg_t *pkg);

/** Returns the package version as a string.
 * This includes all available epoch, version, and pkgrel components. Use
 * alpm_pkg_vercmp() to compare version strings if necessary.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_version(pmpkg_t *pkg);

/** Returns the package description.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_desc(pmpkg_t *pkg);

/** Returns the package URL.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_url(pmpkg_t *pkg);

/** Returns the build timestamp of the package.
 * @param pkg a pointer to package
 * @return the timestamp of the build time
 */
time_t alpm_pkg_get_builddate(pmpkg_t *pkg);

/** Returns the install timestamp of the package.
 * @param pkg a pointer to package
 * @return the timestamp of the install time
 */
time_t alpm_pkg_get_installdate(pmpkg_t *pkg);

/** Returns the packager's name.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_packager(pmpkg_t *pkg);

/** Returns the package's MD5 checksum as a string.
 * The returned string is a sequence of lowercase hexadecimal digits.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_md5sum(pmpkg_t *pkg);

/** Returns the architecture for which the package was built.
 * @param pkg a pointer to package
 * @return a reference to an internal string
 */
const char *alpm_pkg_get_arch(pmpkg_t *pkg);

/** Returns the size of the package.
 * @param pkg a pointer to package
 * @return the size of the package in bytes.
 */
off_t alpm_pkg_get_size(pmpkg_t *pkg);

/** Returns the installed size of the package.
 * @param pkg a pointer to package
 * @return the total size of files installed by the package.
 */
off_t alpm_pkg_get_isize(pmpkg_t *pkg);

/** Returns the package installation reason.
 * @param pkg a pointer to package
 * @return an enum member giving the install reason.
 */
alpm_pkgreason_t alpm_pkg_get_reason(pmpkg_t *pkg);

/** Returns the list of package licenses.
 * @param pkg a pointer to package
 * @return a pointer to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_licenses(pmpkg_t *pkg);

/** Returns the list of package groups.
 * @param pkg a pointer to package
 * @return a pointer to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_groups(pmpkg_t *pkg);

/** Returns the list of package dependencies as pmdepend_t.
 * @param pkg a pointer to package
 * @return a reference to an internal list of pmdepend_t structures.
 */
alpm_list_t *alpm_pkg_get_depends(pmpkg_t *pkg);

/** Returns the list of package optional dependencies.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_optdepends(pmpkg_t *pkg);

/** Returns the list of package names conflicting with pkg.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_conflicts(pmpkg_t *pkg);

/** Returns the list of package names provided by pkg.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_provides(pmpkg_t *pkg);

/** Returns the list of available deltas for pkg.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_deltas(pmpkg_t *pkg);

/** Returns the list of packages to be replaced by pkg.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_replaces(pmpkg_t *pkg);

/** Returns the list of files installed by pkg.
 * The filenames are relative to the install root,
 * and do not include leading slashes.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_files(pmpkg_t *pkg);

/** Returns the list of files backed up when installing pkg.
 * The elements of the returned list have the form
 * "<filename>\t<md5sum>", where the given md5sum is that of
 * the file as provided by the package.
 * @param pkg a pointer to package
 * @return a reference to an internal list of strings.
 */
alpm_list_t *alpm_pkg_get_backup(pmpkg_t *pkg);

/** Returns the database containing pkg.
 * Returns a pointer to the pmdb_t structure the package is
 * originating from, or NULL if the package was loaded from a file.
 * @param pkg a pointer to package
 * @return a pointer to the DB containing pkg, or NULL.
 */
pmdb_t *alpm_pkg_get_db(pmpkg_t *pkg);

/* End of pmpkg_t accessors */
/* @} */

/** Open a package changelog for reading.
 * Similar to fopen in functionality, except that the returned 'file
 * stream' could really be from an archive as well as from the database.
 * @param pkg the package to read the changelog of (either file or db)
 * @return a 'file stream' to the package changelog
 */
void *alpm_pkg_changelog_open(pmpkg_t *pkg);

/** Read data from an open changelog 'file stream'.
 * Similar to fread in functionality, this function takes a buffer and
 * amount of data to read. If an error occurs pm_errno will be set.
 * @param ptr a buffer to fill with raw changelog data
 * @param size the size of the buffer
 * @param pkg the package that the changelog is being read from
 * @param fp a 'file stream' to the package changelog
 * @return the number of characters read, or 0 if there is no more data or an
 * error occurred.
 */
size_t alpm_pkg_changelog_read(void *ptr, size_t size,
		const pmpkg_t *pkg, const void *fp);

/*int alpm_pkg_changelog_feof(const pmpkg_t *pkg, void *fp);*/

int alpm_pkg_changelog_close(const pmpkg_t *pkg, void *fp);

/** Returns whether the package has an install scriptlet.
 * @return 0 if FALSE, TRUE otherwise
 */
int alpm_pkg_has_scriptlet(pmpkg_t *pkg);

/** Returns the size of download.
 * Returns the size of the files that will be downloaded to install a
 * package.
 * @param newpkg the new package to upgrade to
 * @return the size of the download
 */
off_t alpm_pkg_download_size(pmpkg_t *newpkg);

alpm_list_t *alpm_pkg_unused_deltas(pmpkg_t *pkg);

/* End of alpm_pkg */
/** @} */

/*
 * Signatures
 */

int alpm_pkg_check_pgp_signature(pmpkg_t *pkg);

int alpm_db_check_pgp_signature(pmdb_t *db);

/*
 * Groups
 */

alpm_list_t *alpm_find_grp_pkgs(alpm_list_t *dbs, const char *name);

/*
 * Sync
 */

pmpkg_t *alpm_sync_newversion(pmpkg_t *pkg, alpm_list_t *dbs_sync);

/** @addtogroup alpm_api_trans Transaction Functions
 * Functions to manipulate libalpm transactions
 * @{
 */

/** Transaction flags */
typedef enum _pmtransflag_t {
	/** Ignore dependency checks. */
	PM_TRANS_FLAG_NODEPS = 1,
	/** Ignore file conflicts and overwrite files. */
	PM_TRANS_FLAG_FORCE = (1 << 1),
	/** Delete files even if they are tagged as backup. */
	PM_TRANS_FLAG_NOSAVE = (1 << 2),
	/** Ignore version numbers when checking dependencies. */
	PM_TRANS_FLAG_NODEPVERSION = (1 << 3),
	/** Remove also any packages depending on a package being removed. */
	PM_TRANS_FLAG_CASCADE = (1 << 4),
	/** Remove packages and their unneeded deps (not explicitly installed). */
	PM_TRANS_FLAG_RECURSE = (1 << 5),
	/** Modify database but do not commit changes to the filesystem. */
	PM_TRANS_FLAG_DBONLY = (1 << 6),
	/* (1 << 7) flag can go here */
	/** Use PM_PKG_REASON_DEPEND when installing packages. */
	PM_TRANS_FLAG_ALLDEPS = (1 << 8),
	/** Only download packages and do not actually install. */
	PM_TRANS_FLAG_DOWNLOADONLY = (1 << 9),
	/** Do not execute install scriptlets after installing. */
	PM_TRANS_FLAG_NOSCRIPTLET = (1 << 10),
	/** Ignore dependency conflicts. */
	PM_TRANS_FLAG_NOCONFLICTS = (1 << 11),
	/* (1 << 12) flag can go here */
	/** Do not install a package if it is already installed and up to date. */
	PM_TRANS_FLAG_NEEDED = (1 << 13),
	/** Use PM_PKG_REASON_EXPLICIT when installing packages. */
	PM_TRANS_FLAG_ALLEXPLICIT = (1 << 14),
	/** Do not remove a package if it is needed by another one. */
	PM_TRANS_FLAG_UNNEEDED = (1 << 15),
	/** Remove also explicitly installed unneeded deps (use with PM_TRANS_FLAG_RECURSE). */
	PM_TRANS_FLAG_RECURSEALL = (1 << 16),
	/** Do not lock the database during the operation. */
	PM_TRANS_FLAG_NOLOCK = (1 << 17)
} pmtransflag_t;

/** Transaction events.
 * NULL parameters are passed to in all events unless specified otherwise.
 */
typedef enum _pmtransevt_t {
	/** Dependencies will be computed for a package. */
	PM_TRANS_EVT_CHECKDEPS_START = 1,
	/** Dependencies were computed for a package. */
	PM_TRANS_EVT_CHECKDEPS_DONE,
	/** File conflicts will be computed for a package. */
	PM_TRANS_EVT_FILECONFLICTS_START,
	/** File conflicts were computed for a package. */
	PM_TRANS_EVT_FILECONFLICTS_DONE,
	/** Dependencies will be resolved for target package. */
	PM_TRANS_EVT_RESOLVEDEPS_START,
	/** Dependencies were resolved for target package. */
	PM_TRANS_EVT_RESOLVEDEPS_DONE,
	/** Inter-conflicts will be checked for target package. */
	PM_TRANS_EVT_INTERCONFLICTS_START,
	/** Inter-conflicts were checked for target package. */
	PM_TRANS_EVT_INTERCONFLICTS_DONE,
	/** Package will be installed.
	 * A pointer to the target package is passed to the callback.
	 */
	PM_TRANS_EVT_ADD_START,
	/** Package was installed.
	 * A pointer to the new package is passed to the callback.
	 */
	PM_TRANS_EVT_ADD_DONE,
	/** Package will be removed.
	 * A pointer to the target package is passed to the callback.
	 */
	PM_TRANS_EVT_REMOVE_START,
	/** Package was removed.
	 * A pointer to the removed package is passed to the callback.
	 */
	PM_TRANS_EVT_REMOVE_DONE,
	/** Package will be upgraded.
	 * A pointer to the upgraded package is passed to the callback.
	 */
	PM_TRANS_EVT_UPGRADE_START,
	/** Package was upgraded.
	 * A pointer to the new package, and a pointer to the old package is passed
	 * to the callback, respectively.
	 */
	PM_TRANS_EVT_UPGRADE_DONE,
	/** Target package's integrity will be checked. */
	PM_TRANS_EVT_INTEGRITY_START,
	/** Target package's integrity was checked. */
	PM_TRANS_EVT_INTEGRITY_DONE,
	/** Target deltas's integrity will be checked. */
	PM_TRANS_EVT_DELTA_INTEGRITY_START,
	/** Target delta's integrity was checked. */
	PM_TRANS_EVT_DELTA_INTEGRITY_DONE,
	/** Deltas will be applied to packages. */
	PM_TRANS_EVT_DELTA_PATCHES_START,
	/** Deltas were applied to packages. */
	PM_TRANS_EVT_DELTA_PATCHES_DONE,
	/** Delta patch will be applied to target package.
	 * The filename of the package and the filename of the patch is passed to the
	 * callback.
	 */
	PM_TRANS_EVT_DELTA_PATCH_START,
	/** Delta patch was applied to target package. */
	PM_TRANS_EVT_DELTA_PATCH_DONE,
	/** Delta patch failed to apply to target package. */
	PM_TRANS_EVT_DELTA_PATCH_FAILED,
	/** Scriptlet has printed information.
	 * A line of text is passed to the callback.
	 */
	PM_TRANS_EVT_SCRIPTLET_INFO,
	/** Files will be downloaded from a repository.
	 * The repository's tree name is passed to the callback.
	 */
	PM_TRANS_EVT_RETRIEVE_START,
	/** Disk space usage will be computed for a package */
	PM_TRANS_EVT_DISKSPACE_START,
	/** Disk space usage was computed for a package */
	PM_TRANS_EVT_DISKSPACE_DONE,
} pmtransevt_t;

/** Transaction Conversations (ie, questions) */
typedef enum _pmtransconv_t {
	PM_TRANS_CONV_INSTALL_IGNOREPKG = 1,
	PM_TRANS_CONV_REPLACE_PKG = (1 << 1),
	PM_TRANS_CONV_CONFLICT_PKG = (1 << 2),
	PM_TRANS_CONV_CORRUPTED_PKG = (1 << 3),
	PM_TRANS_CONV_LOCAL_NEWER = (1 << 4),
	PM_TRANS_CONV_REMOVE_PKGS = (1 << 5),
	PM_TRANS_CONV_SELECT_PROVIDER = (1 << 6),
} pmtransconv_t;

/** Transaction Progress */
typedef enum _pmtransprog_t {
	PM_TRANS_PROGRESS_ADD_START,
	PM_TRANS_PROGRESS_UPGRADE_START,
	PM_TRANS_PROGRESS_REMOVE_START,
	PM_TRANS_PROGRESS_CONFLICTS_START,
	PM_TRANS_PROGRESS_DISKSPACE_START,
	PM_TRANS_PROGRESS_INTEGRITY_START,
} pmtransprog_t;

/** Transaction Event callback */
typedef void (*alpm_trans_cb_event)(pmtransevt_t, void *, void *);

/** Transaction Conversation callback */
typedef void (*alpm_trans_cb_conv)(pmtransconv_t, void *, void *,
                                   void *, int *);

/** Transaction Progress callback */
typedef void (*alpm_trans_cb_progress)(pmtransprog_t, const char *, int, size_t, size_t);

/** Returns the bitfield of flags for the current transaction.
 * @param handle the context handle
 * @return the bitfield of transaction flags
 */
pmtransflag_t alpm_trans_get_flags(pmhandle_t *handle);

/** Returns a list of packages added by the transaction.
 * @param handle the context handle
 * @return a list of pmpkg_t structures
 */
alpm_list_t * alpm_trans_get_add(pmhandle_t *handle);

/** Returns the list of packages removed by the transaction.
 * @param handle the context handle
 * @return a list of pmpkg_t structures
 */
alpm_list_t * alpm_trans_get_remove(pmhandle_t *handle);

/** Initialize the transaction.
 * @param handle the context handle
 * @param flags flags of the transaction (like nodeps, etc)
 * @param event event callback function pointer
 * @param conv question callback function pointer
 * @param progress progress callback function pointer
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_init(pmhandle_t *handle, pmtransflag_t flags,
                    alpm_trans_cb_event cb_event, alpm_trans_cb_conv conv,
                    alpm_trans_cb_progress cb_progress);

/** Prepare a transaction.
 * @param handle the context handle
 * @param data the address of an alpm_list where a list
 * of pmdepmissing_t objects is dumped (conflicting packages)
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_prepare(pmhandle_t *handle, alpm_list_t **data);

/** Commit a transaction.
 * @param handle the context handle
 * @param data the address of an alpm_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(pmhandle_t *handle, alpm_list_t **data);

/** Interrupt a transaction.
 * @param handle the context handle
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_interrupt(pmhandle_t *handle);

/** Release a transaction.
 * @param handle the context handle
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_trans_release(pmhandle_t *handle);
/** @} */

/** @name Common Transactions */
/** @{ */

/** Search for packages to upgrade and add them to the transaction.
 * @param handle the context handle
 * @param enable_downgrade allow downgrading of packages if the remote version is lower
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_sync_sysupgrade(pmhandle_t *handle, int enable_downgrade);

/** Add a package to the transaction.
 * If the package was loaded by alpm_pkg_load(), it will be freed upon
 * alpm_trans_release() invocation.
 * @param handle the context handle
 * @param pkg the package to add
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_add_pkg(pmhandle_t *handle, pmpkg_t *pkg);

/** Add a package removal action to the transaction.
 * @param handle the context handle
 * @param pkg the package to uninstall
 * @return 0 on success, -1 on error (pm_errno is set accordingly)
 */
int alpm_remove_pkg(pmhandle_t *handle, pmpkg_t *pkg);

/** @} */

/** @addtogroup alpm_api_depends Dependency Functions
 * Functions dealing with libalpm representation of dependency
 * information.
 * @{
 */

alpm_list_t *alpm_checkdeps(pmhandle_t *handle, alpm_list_t *pkglist,
		alpm_list_t *remove, alpm_list_t *upgrade, int reversedeps);
pmpkg_t *alpm_find_satisfier(alpm_list_t *pkgs, const char *depstring);
pmpkg_t *alpm_find_dbs_satisfier(pmhandle_t *handle,
		alpm_list_t *dbs, const char *depstring);

alpm_list_t *alpm_checkconflicts(pmhandle_t *handle, alpm_list_t *pkglist);

/** Returns a newly allocated string representing the dependency information.
 * @param dep a dependency info structure
 * @return a formatted string, e.g. "glibc>=2.12"
 */
char *alpm_dep_compute_string(const pmdepend_t *dep);

/** @} */

/** @} */

/*
 * Helpers
 */

/* checksums */
char *alpm_compute_md5sum(const char *name);

/** @addtogroup alpm_api_errors Error Codes
 * @{
 */
enum _pmerrno_t {
	PM_ERR_MEMORY = 1,
	PM_ERR_SYSTEM,
	PM_ERR_BADPERMS,
	PM_ERR_NOT_A_FILE,
	PM_ERR_NOT_A_DIR,
	PM_ERR_WRONG_ARGS,
	PM_ERR_DISK_SPACE,
	/* Interface */
	PM_ERR_HANDLE_NULL,
	PM_ERR_HANDLE_NOT_NULL,
	PM_ERR_HANDLE_LOCK,
	/* Databases */
	PM_ERR_DB_OPEN,
	PM_ERR_DB_CREATE,
	PM_ERR_DB_NULL,
	PM_ERR_DB_NOT_NULL,
	PM_ERR_DB_NOT_FOUND,
	PM_ERR_DB_INVALID,
	PM_ERR_DB_VERSION,
	PM_ERR_DB_WRITE,
	PM_ERR_DB_REMOVE,
	/* Servers */
	PM_ERR_SERVER_BAD_URL,
	PM_ERR_SERVER_NONE,
	/* Transactions */
	PM_ERR_TRANS_NOT_NULL,
	PM_ERR_TRANS_NULL,
	PM_ERR_TRANS_DUP_TARGET,
	PM_ERR_TRANS_NOT_INITIALIZED,
	PM_ERR_TRANS_NOT_PREPARED,
	PM_ERR_TRANS_ABORT,
	PM_ERR_TRANS_TYPE,
	PM_ERR_TRANS_NOT_LOCKED,
	/* Packages */
	PM_ERR_PKG_NOT_FOUND,
	PM_ERR_PKG_IGNORED,
	PM_ERR_PKG_INVALID,
	PM_ERR_PKG_OPEN,
	PM_ERR_PKG_CANT_REMOVE,
	PM_ERR_PKG_INVALID_NAME,
	PM_ERR_PKG_INVALID_ARCH,
	PM_ERR_PKG_REPO_NOT_FOUND,
	/* Signatures */
	PM_ERR_SIG_MISSINGDIR,
	PM_ERR_SIG_INVALID,
	PM_ERR_SIG_UNKNOWN,
	/* Deltas */
	PM_ERR_DLT_INVALID,
	PM_ERR_DLT_PATCHFAILED,
	/* Dependencies */
	PM_ERR_UNSATISFIED_DEPS,
	PM_ERR_CONFLICTING_DEPS,
	PM_ERR_FILE_CONFLICTS,
	/* Misc */
	PM_ERR_RETRIEVE,
	PM_ERR_INVALID_REGEX,
	/* External library errors */
	PM_ERR_LIBARCHIVE,
	PM_ERR_LIBCURL,
	PM_ERR_EXTERNAL_DOWNLOAD,
	PM_ERR_GPGME
};

/** Returns the current error code from the handle. */
enum _pmerrno_t alpm_errno(pmhandle_t *handle);

/** Returns the string corresponding to an error number. */
const char *alpm_strerror(enum _pmerrno_t err);

/* End of alpm_api_errors */
/** @} */

pmhandle_t *alpm_initialize(const char *root, const char *dbpath,
		enum _pmerrno_t *err);
int alpm_release(pmhandle_t *handle);
const char *alpm_version(void);

/* End of alpm_api */
/** @} */

#ifdef __cplusplus
}
#endif
#endif /* _ALPM_H */

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