libopkg/pkg_hash.c

   1 /* opkg_hash.c - the opkg package management system
   2
   3    Steven M. Ayer
   4
   5    Copyright (C) 2002 Compaq Computer Corporation
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16 */
  17
  18 #include <stdio.h>
  19
  20 #include "hash_table.h"
  21 #include "pkg.h"
  22 #include "opkg_message.h"
  23 #include "pkg_vec.h"
  24 #include "pkg_hash.h"
  25 #include "parse_util.h"
  26 #include "pkg_parse.h"
  27 #include "opkg_utils.h"
  28 #include "sprintf_alloc.h"
  29 #include "file_util.h"
  30 #include "libbb/libbb.h"
  31 #include "libbb/gzip.h"
  32
  33 void pkg_hash_init(void)
  34 {
  35         hash_table_init("pkg-hash", &conf->pkg_hash,
  36                         OPKG_CONF_DEFAULT_HASH_LEN);
  37 }
  38
  39 static void free_pkgs(const char *key, void *entry, void *data)
  40 {
  41         int i;
  42         abstract_pkg_t *ab_pkg;
  43
  44         /* Each entry in the hash table is an abstract package, which contains
  45          * a list of packages that provide the abstract package.
  46          */
  47
  48         ab_pkg = (abstract_pkg_t *) entry;
  49
  50         if (ab_pkg->pkgs) {
  51                 for (i = 0; i < ab_pkg->pkgs->len; i++) {
  52                         pkg_deinit(ab_pkg->pkgs->pkgs[i]);
  53                         free(ab_pkg->pkgs->pkgs[i]);
  54                 }
  55         }
  56
  57         abstract_pkg_vec_free(ab_pkg->provided_by);
  58         abstract_pkg_vec_free(ab_pkg->replaced_by);
  59         pkg_vec_free(ab_pkg->pkgs);
  60         free(ab_pkg->depended_upon_by);
  61         free(ab_pkg->name);
  62         free(ab_pkg);
  63 }
  64
  65 void pkg_hash_deinit(void)
  66 {
  67         hash_table_foreach(&conf->pkg_hash, free_pkgs, NULL);
  68         hash_table_deinit(&conf->pkg_hash);
  69 }
  70
  71 int dist_hash_add_from_file(const char *lists_dir, pkg_src_t * dist)
  72 {
  73         nv_pair_list_elt_t *l;
  74         char *list_file, *subname;
  75
  76         list_for_each_entry(l, &conf->arch_list.head, node) {
  77                 nv_pair_t *nv = (nv_pair_t *) l->data;
  78                 sprintf_alloc(&subname, "%s-%s", dist->name, nv->name);
  79                 sprintf_alloc(&list_file, "%s/%s", lists_dir, subname);
  80
  81                 if (file_exists(list_file)) {
  82                         if (pkg_hash_add_from_file(list_file, dist, NULL, 0, 0)) {
  83                                 free(list_file);
  84                                 return -1;
  85                         }
  86                         pkg_src_list_append(&conf->pkg_src_list, subname,
  87                                             dist->value, "__dummy__", 0);
  88                 }
  89
  90                 free(list_file);
  91         }
  92
  93         return 0;
  94 }
  95
  96 int
  97 pkg_hash_add_from_file(const char *file_name,
  98                        pkg_src_t * src, pkg_dest_t * dest, int is_status_file, int state_flags)
  99 {
 100         pkg_t *pkg;
 101         FILE *fp;
 102         char *buf;
 103         const size_t len = 4096;
 104         int ret = 0;
 105         struct gzip_handle zh;
 106
 107         if (src && src->gzip) {
 108                 fp = gzip_fdopen(&zh, file_name);
 109         } else {
 110                 fp = fopen(file_name, "r");
 111         }
 112
 113         if (fp == NULL) {
 114                 opkg_perror(ERROR, "Failed to open %s", file_name);
 115                 return -1;
 116         }
 117
 118         buf = xmalloc(len);
 119
 120         do {
 121                 pkg = pkg_new();
 122                 pkg->src = src;
 123                 pkg->dest = dest;
 124                 pkg->state_flag |= state_flags;
 125
 126                 ret = parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, 0,
 127                                                  &buf, len);
 128
 129                 if (pkg->name == NULL) {
 130                         /* probably just a blank line */
 131                         ret = 1;
 132                 }
 133
 134                 if (ret) {
 135                         pkg_deinit(pkg);
 136                         free(pkg);
 137                         if (ret == -1)
 138                                 break;
 139                         if (ret == 1)
 140                                 /* Probably a blank line, continue parsing. */
 141                                 ret = 0;
 142                         continue;
 143                 }
 144
 145                 if (!pkg_get_architecture(pkg) || !pkg_get_arch_priority(pkg)) {
 146                         char *version_str = pkg_version_str_alloc(pkg);
 147                         opkg_msg(NOTICE, "Package %s version %s has no "
 148                                  "valid architecture, ignoring.\n",
 149                                  pkg->name, version_str);
 150                         free(version_str);
 151                         continue;
 152                 }
 153
 154                 hash_insert_pkg(pkg, is_status_file);
 155
 156         } while (!feof(fp));
 157
 158         free(buf);
 159         fclose(fp);
 160
 161         if (src && src->gzip)
 162                 gzip_close(&zh);
 163
 164         return ret;
 165 }
 166
 167 /*
 168  * Load in feed files from the cached "src" and/or "src/gz" locations.
 169  */
 170 int pkg_hash_load_feeds(void)
 171 {
 172         pkg_src_list_elt_t *iter;
 173         pkg_src_t *src, *subdist;
 174         char *list_file, *lists_dir;
 175
 176         opkg_msg(INFO, "\n");
 177
 178         lists_dir = conf->restrict_to_default_dest ?
 179             conf->default_dest->lists_dir : conf->lists_dir;
 180
 181         for (iter = void_list_first(&conf->pkg_src_list); iter;
 182              iter = void_list_next(&conf->pkg_src_list, iter)) {
 183
 184                 src = (pkg_src_t *) iter->data;
 185
 186                 sprintf_alloc(&list_file, "%s/%s", lists_dir, src->name);
 187
 188                 if (file_exists(list_file)) {
 189                         if (pkg_hash_add_from_file(list_file, src, NULL, 0, 0)) {
 190                                 free(list_file);
 191                                 return -1;
 192                         }
 193                 }
 194                 free(list_file);
 195         }
 196
 197         return 0;
 198 }
 199
 200 /*
 201  * Load in status files from the configured "dest"s.
 202  */
 203 int pkg_hash_load_status_files(void)
 204 {
 205         pkg_dest_list_elt_t *iter;
 206         pkg_dest_t *dest;
 207
 208         opkg_msg(INFO, "\n");
 209
 210         for (iter = void_list_first(&conf->pkg_dest_list); iter;
 211              iter = void_list_next(&conf->pkg_dest_list, iter)) {
 212
 213                 dest = (pkg_dest_t *) iter->data;
 214
 215                 if (file_exists(dest->status_file_name)) {
 216                         if (pkg_hash_add_from_file
 217                             (dest->status_file_name, NULL, dest, 1, SF_NEED_DETAIL))
 218                                 return -1;
 219                 }
 220         }
 221
 222         return 0;
 223 }
 224
 225 pkg_t *pkg_hash_fetch_best_installation_candidate(abstract_pkg_t * apkg,
 226                                                   int (*constraint_fcn) (pkg_t *
 227                                                                          pkg,
 228                                                                          void
 229                                                                          *cdata),
 230                                                   void *cdata, int quiet)
 231 {
 232         int i, j;
 233         int nprovides = 0;
 234         int nmatching = 0;
 235         int wrong_arch_found = 0;
 236         int arch_priority;
 237         pkg_vec_t *matching_pkgs;
 238         abstract_pkg_vec_t *matching_apkgs;
 239         abstract_pkg_vec_t *provided_apkg_vec;
 240         abstract_pkg_t **provided_apkgs;
 241         abstract_pkg_vec_t *providers;
 242         pkg_t *latest_installed_parent = NULL;
 243         pkg_t *latest_matching = NULL;
 244         pkg_t *priorized_matching = NULL;
 245         pkg_t *held_pkg = NULL;
 246         pkg_t *good_pkg_by_name = NULL;
 247
 248         if (apkg == NULL || apkg->provided_by == NULL
 249             || (apkg->provided_by->len == 0))
 250                 return NULL;
 251
 252         matching_pkgs = pkg_vec_alloc();
 253         matching_apkgs = abstract_pkg_vec_alloc();
 254         providers = abstract_pkg_vec_alloc();
 255
 256         opkg_msg(DEBUG, "Best installation candidate for %s:\n", apkg->name);
 257
 258         provided_apkg_vec = apkg->provided_by;
 259         nprovides = provided_apkg_vec->len;
 260         provided_apkgs = provided_apkg_vec->pkgs;
 261         if (nprovides > 1)
 262                 opkg_msg(DEBUG, "apkg=%s nprovides=%d.\n", apkg->name,
 263                          nprovides);
 264
 265         /* accumulate all the providers */
 266         for (i = 0; i < nprovides; i++) {
 267                 abstract_pkg_t *provider_apkg = provided_apkgs[i];
 268                 opkg_msg(DEBUG, "Adding %s to providers.\n",
 269                          provider_apkg->name);
 270                 abstract_pkg_vec_insert(providers, provider_apkg);
 271         }
 272         nprovides = providers->len;
 273
 274         for (i = 0; i < nprovides; i++) {
 275                 abstract_pkg_t *provider_apkg =
 276                     abstract_pkg_vec_get(providers, i);
 277                 abstract_pkg_t *replacement_apkg = NULL;
 278                 pkg_vec_t *vec;
 279
 280                 if (provider_apkg->replaced_by
 281                     && provider_apkg->replaced_by->len) {
 282                         replacement_apkg = provider_apkg->replaced_by->pkgs[0];
 283                         if (provider_apkg->replaced_by->len > 1) {
 284                                 opkg_msg(NOTICE, "Multiple replacers for %s, "
 285                                          "using first one (%s).\n",
 286                                          provider_apkg->name,
 287                                          replacement_apkg->name);
 288                         }
 289                 }
 290
 291                 if (replacement_apkg)
 292                         opkg_msg(DEBUG,
 293                                  "replacement_apkg=%s for provider_apkg=%s.\n",
 294                                  replacement_apkg->name, provider_apkg->name);
 295
 296                 if (replacement_apkg && (replacement_apkg != provider_apkg)) {
 297                         if (abstract_pkg_vec_contains
 298                             (providers, replacement_apkg))
 299                                 continue;
 300                         else
 301                                 provider_apkg = replacement_apkg;
 302                 }
 303
 304                 if (!(vec = provider_apkg->pkgs)) {
 305                         opkg_msg(DEBUG, "No pkgs for provider_apkg %s.\n",
 306                                  provider_apkg->name);
 307                         continue;
 308                 }
 309
 310                 /* now check for supported architecture */
 311                 {
 312                         int max_count = 0;
 313
 314                         /* count packages matching max arch priority and keep track of last one */
 315                         for (j = 0; j < vec->len; j++) {
 316                                 pkg_t *maybe = vec->pkgs[j];
 317                                 arch_priority = pkg_get_arch_priority(maybe);
 318
 319                                 opkg_msg(DEBUG,
 320                                          "%s arch=%s arch_priority=%d version=%s.\n",
 321                                          maybe->name, pkg_get_architecture(maybe),
 322                                          arch_priority, pkg_get_string(maybe, PKG_VERSION));
 323                                 /* We make sure not to add the same package twice. Need to search for the reason why
 324                                    they show up twice sometimes. */
 325                                 if ((arch_priority > 0)
 326                                     &&
 327                                     (!pkg_vec_contains(matching_pkgs, maybe))) {
 328                                         max_count++;
 329                                         abstract_pkg_vec_insert(matching_apkgs,
 330                                                                 maybe->parent);
 331                                         pkg_vec_insert(matching_pkgs, maybe);
 332                                 }
 333                         }
 334
 335                         if (vec->len > 0 && matching_pkgs->len < 1)
 336                                 wrong_arch_found = 1;
 337                 }
 338         }
 339
 340         if (matching_pkgs->len < 1) {
 341                 if (wrong_arch_found)
 342                         opkg_msg(ERROR, "Packages for %s found, but"
 343                                  " incompatible with the architectures configured\n",
 344                                  apkg->name);
 345                 pkg_vec_free(matching_pkgs);
 346                 abstract_pkg_vec_free(matching_apkgs);
 347                 abstract_pkg_vec_free(providers);
 348                 return NULL;
 349         }
 350
 351         if (matching_pkgs->len > 1)
 352                 pkg_vec_sort(matching_pkgs,
 353                              pkg_name_version_and_architecture_compare);
 354         if (matching_apkgs->len > 1)
 355                 abstract_pkg_vec_sort(matching_pkgs, abstract_pkg_name_compare);
 356
 357         for (i = 0; i < matching_pkgs->len; i++) {
 358                 pkg_t *matching = matching_pkgs->pkgs[i];
 359                 if (constraint_fcn(matching, cdata)) {
 360                         opkg_msg(DEBUG, "Candidate: %s %s.\n",
 361                                  matching->name, pkg_get_string(matching, PKG_VERSION));
 362                         good_pkg_by_name = matching;
 363                         /* It has been provided by hand, so it is what user want */
 364                         if (matching->provided_by_hand == 1)
 365                                 break;
 366                 }
 367         }
 368
 369         for (i = 0; i < matching_pkgs->len; i++) {
 370                 pkg_t *matching = matching_pkgs->pkgs[i];
 371                 latest_matching = matching;
 372                 if (matching->parent->state_status == SS_INSTALLED
 373                     || matching->parent->state_status == SS_UNPACKED)
 374                         latest_installed_parent = matching;
 375                 if (matching->state_flag & (SF_HOLD | SF_PREFER)) {
 376                         if (held_pkg)
 377                                 opkg_msg(NOTICE,
 378                                          "Multiple packages (%s and %s) providing"
 379                                          " same name marked HOLD or PREFER. "
 380                                          "Using latest.\n", held_pkg->name,
 381                                          matching->name);
 382                         held_pkg = matching;
 383                 }
 384         }
 385
 386         if (!good_pkg_by_name && !held_pkg && !latest_installed_parent
 387             && matching_apkgs->len > 1 && !quiet) {
 388                 int prio = 0;
 389                 for (i = 0; i < matching_pkgs->len; i++) {
 390                         pkg_t *matching = matching_pkgs->pkgs[i];
 391                         arch_priority = pkg_get_arch_priority(matching);
 392                         if (arch_priority > prio) {
 393                                 priorized_matching = matching;
 394                                 prio = arch_priority;
 395                                 opkg_msg(DEBUG, "Match %s with priority %i.\n",
 396                                          matching->name, prio);
 397                         }
 398                 }
 399
 400         }
 401
 402         if (conf->verbosity >= INFO && matching_apkgs->len > 1) {
 403                 opkg_msg(INFO, "%d matching pkgs for apkg=%s:\n",
 404                          matching_pkgs->len, apkg->name);
 405                 for (i = 0; i < matching_pkgs->len; i++) {
 406                         pkg_t *matching = matching_pkgs->pkgs[i];
 407                         opkg_msg(INFO, "%s %s %s\n",
 408                                  matching->name, pkg_get_string(matching, PKG_VERSION),
 409                                  pkg_get_architecture(matching));
 410                 }
 411         }
 412
 413         nmatching = matching_apkgs->len;
 414
 415         pkg_vec_free(matching_pkgs);
 416         abstract_pkg_vec_free(matching_apkgs);
 417         abstract_pkg_vec_free(providers);
 418
 419         if (good_pkg_by_name) { /* We found a good candidate, we will install it */
 420                 return good_pkg_by_name;
 421         }
 422         if (held_pkg) {
 423                 opkg_msg(INFO, "Using held package %s.\n", held_pkg->name);
 424                 return held_pkg;
 425         }
 426         if (latest_installed_parent) {
 427                 opkg_msg(INFO,
 428                          "Using latest version of installed package %s.\n",
 429                          latest_installed_parent->name);
 430                 return latest_installed_parent;
 431         }
 432         if (priorized_matching) {
 433                 opkg_msg(INFO, "Using priorized matching %s %s %s.\n",
 434                          priorized_matching->name, pkg_get_string(priorized_matching, PKG_VERSION),
 435                          pkg_get_architecture(priorized_matching));
 436                 return priorized_matching;
 437         }
 438         if (nmatching > 1) {
 439                 opkg_msg(INFO, "No matching pkg out of %d matching_apkgs.\n",
 440                          nmatching);
 441                 return NULL;
 442         }
 443         if (latest_matching) {
 444                 opkg_msg(INFO, "Using latest matching %s %s %s.\n",
 445                          latest_matching->name, pkg_get_string(latest_matching, PKG_VERSION),
 446                          pkg_get_architecture(latest_matching));
 447                 return latest_matching;
 448         }
 449         return NULL;
 450 }
 451
 452 static int pkg_name_constraint_fcn(pkg_t * pkg, void *cdata)
 453 {
 454         const char *name = (const char *)cdata;
 455
 456         if (strcmp(pkg->name, name) == 0)
 457                 return 1;
 458         else
 459                 return 0;
 460 }
 461
 462 static pkg_vec_t *pkg_vec_fetch_by_name(const char *pkg_name)
 463 {
 464         abstract_pkg_t *ab_pkg;
 465
 466         if (!(ab_pkg = abstract_pkg_fetch_by_name(pkg_name)))
 467                 return NULL;
 468
 469         if (ab_pkg->pkgs)
 470                 return ab_pkg->pkgs;
 471
 472         if (ab_pkg->provided_by) {
 473                 abstract_pkg_t *abpkg =
 474                     abstract_pkg_vec_get(ab_pkg->provided_by, 0);
 475                 if (abpkg != NULL)
 476                         return abpkg->pkgs;
 477                 else
 478                         return ab_pkg->pkgs;
 479         }
 480
 481         return NULL;
 482 }
 483
 484 pkg_t *pkg_hash_fetch_best_installation_candidate_by_name(const char *name)
 485 {
 486         abstract_pkg_t *apkg = NULL;
 487
 488         if (!(apkg = abstract_pkg_fetch_by_name(name)))
 489                 return NULL;
 490
 491         return pkg_hash_fetch_best_installation_candidate(apkg,
 492                                                           pkg_name_constraint_fcn,
 493                                                           apkg->name, 0);
 494 }
 495
 496 pkg_t *pkg_hash_fetch_by_name_version(const char *pkg_name, const char *version)
 497 {
 498         pkg_vec_t *vec;
 499         int i;
 500         char *version_str = NULL;
 501
 502         if (!(vec = pkg_vec_fetch_by_name(pkg_name)))
 503                 return NULL;
 504
 505         for (i = 0; i < vec->len; i++) {
 506                 version_str = pkg_version_str_alloc(vec->pkgs[i]);
 507                 if (!strcmp(version_str, version)) {
 508                         free(version_str);
 509                         break;
 510                 }
 511                 free(version_str);
 512         }
 513
 514         if (i == vec->len)
 515                 return NULL;
 516
 517         return vec->pkgs[i];
 518 }
 519
 520 pkg_t *pkg_hash_fetch_installed_by_name_dest(const char *pkg_name,
 521                                              pkg_dest_t * dest)
 522 {
 523         pkg_vec_t *vec;
 524         int i;
 525
 526         if (!(vec = pkg_vec_fetch_by_name(pkg_name))) {
 527                 return NULL;
 528         }
 529
 530         for (i = 0; i < vec->len; i++)
 531                 if ((vec->pkgs[i]->state_status == SS_INSTALLED
 532                      || vec->pkgs[i]->state_status == SS_UNPACKED)
 533                     && vec->pkgs[i]->dest == dest) {
 534                         return vec->pkgs[i];
 535                 }
 536
 537         return NULL;
 538 }
 539
 540 pkg_t *pkg_hash_fetch_installed_by_name(const char *pkg_name)
 541 {
 542         pkg_vec_t *vec;
 543         int i;
 544
 545         if (!(vec = pkg_vec_fetch_by_name(pkg_name))) {
 546                 return NULL;
 547         }
 548
 549         for (i = 0; i < vec->len; i++) {
 550                 if (vec->pkgs[i]->state_status == SS_INSTALLED
 551                     || vec->pkgs[i]->state_status == SS_UNPACKED) {
 552                         return vec->pkgs[i];
 553                 }
 554         }
 555
 556         return NULL;
 557 }
 558
 559 static void
 560 pkg_hash_fetch_available_helper(const char *pkg_name, void *entry, void *data)
 561 {
 562         int j;
 563         abstract_pkg_t *ab_pkg = (abstract_pkg_t *) entry;
 564         pkg_vec_t *all = (pkg_vec_t *) data;
 565         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 566
 567         if (!pkg_vec)
 568                 return;
 569
 570         for (j = 0; j < pkg_vec->len; j++) {
 571                 pkg_t *pkg = pkg_vec->pkgs[j];
 572                 pkg_vec_insert(all, pkg);
 573         }
 574 }
 575
 576 void pkg_hash_fetch_available(pkg_vec_t * all)
 577 {
 578         hash_table_foreach(&conf->pkg_hash, pkg_hash_fetch_available_helper,
 579                            all);
 580 }
 581
 582 static void
 583 pkg_hash_fetch_all_installed_helper(const char *pkg_name, void *entry,
 584                                     void *data)
 585 {
 586         abstract_pkg_t *ab_pkg = (abstract_pkg_t *) entry;
 587         pkg_vec_t *all = (pkg_vec_t *) data;
 588         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 589         int j;
 590
 591         if (!pkg_vec)
 592                 return;
 593
 594         for (j = 0; j < pkg_vec->len; j++) {
 595                 pkg_t *pkg = pkg_vec->pkgs[j];
 596                 if (pkg->state_status == SS_INSTALLED
 597                     || pkg->state_status == SS_UNPACKED)
 598                         pkg_vec_insert(all, pkg);
 599         }
 600 }
 601
 602 void pkg_hash_fetch_all_installed(pkg_vec_t * all)
 603 {
 604         hash_table_foreach(&conf->pkg_hash, pkg_hash_fetch_all_installed_helper,
 605                            all);
 606 }
 607
 608 /*
 609  * This assumes that the abstract pkg doesn't exist.
 610  */
 611 static abstract_pkg_t *add_new_abstract_pkg_by_name(const char *pkg_name)
 612 {
 613         abstract_pkg_t *ab_pkg;
 614
 615         ab_pkg = abstract_pkg_new();
 616
 617         ab_pkg->name = xstrdup(pkg_name);
 618         hash_table_insert(&conf->pkg_hash, pkg_name, ab_pkg);
 619
 620         return ab_pkg;
 621 }
 622
 623 abstract_pkg_t *ensure_abstract_pkg_by_name(const char *pkg_name)
 624 {
 625         abstract_pkg_t *ab_pkg;
 626
 627         if (!(ab_pkg = abstract_pkg_fetch_by_name(pkg_name)))
 628                 ab_pkg = add_new_abstract_pkg_by_name(pkg_name);
 629
 630         return ab_pkg;
 631 }
 632
 633 void hash_insert_pkg(pkg_t * pkg, int set_status)
 634 {
 635         abstract_pkg_t *ab_pkg;
 636
 637         ab_pkg = ensure_abstract_pkg_by_name(pkg->name);
 638         if (!ab_pkg->pkgs)
 639                 ab_pkg->pkgs = pkg_vec_alloc();
 640
 641         if (pkg->state_status == SS_INSTALLED) {
 642                 ab_pkg->state_status = SS_INSTALLED;
 643         } else if (pkg->state_status == SS_UNPACKED) {
 644                 ab_pkg->state_status = SS_UNPACKED;
 645         }
 646
 647         buildDepends(pkg);
 648
 649         buildProvides(ab_pkg, pkg);
 650
 651         init_providelist(pkg, NULL);
 652
 653         /* Need to build the conflicts graph before replaces for correct
 654          * calculation of replaced_by relation.
 655          */
 656         buildConflicts(pkg);
 657
 658         buildReplaces(ab_pkg, pkg);
 659
 660         buildDependedUponBy(pkg, ab_pkg);
 661
 662         pkg_vec_insert_merge(ab_pkg->pkgs, pkg, set_status);
 663         pkg->parent = ab_pkg;
 664 }
 665
 666 static const char *strip_offline_root(const char *file_name)
 667 {
 668         unsigned int len;
 669
 670         if (conf->offline_root) {
 671                 len = strlen(conf->offline_root);
 672                 if (strncmp(file_name, conf->offline_root, len) == 0)
 673                         file_name += len;
 674         }
 675
 676         return file_name;
 677 }
 678
 679 void file_hash_remove(const char *file_name)
 680 {
 681         file_name = strip_offline_root(file_name);
 682         hash_table_remove(&conf->file_hash, file_name);
 683 }
 684
 685 pkg_t *file_hash_get_file_owner(const char *file_name)
 686 {
 687         file_name = strip_offline_root(file_name);
 688         return hash_table_get(&conf->file_hash, file_name);
 689 }
 690
 691 void file_hash_set_file_owner(const char *file_name, pkg_t * owning_pkg)
 692 {
 693         pkg_t *old_owning_pkg;
 694         int file_name_len = strlen(file_name);
 695
 696         if (file_name[file_name_len - 1] == '/')
 697                 return;
 698
 699         file_name = strip_offline_root(file_name);
 700
 701         old_owning_pkg = hash_table_get(&conf->file_hash, file_name);
 702         hash_table_insert(&conf->file_hash, file_name, owning_pkg);
 703
 704         if (old_owning_pkg) {
 705                 pkg_get_installed_files(old_owning_pkg);
 706                 str_list_remove_elt(old_owning_pkg->installed_files, file_name);
 707                 pkg_free_installed_files(old_owning_pkg);
 708
 709                 /* mark this package to have its filelist written */
 710                 old_owning_pkg->state_flag |= SF_FILELIST_CHANGED;
 711                 owning_pkg->state_flag |= SF_FILELIST_CHANGED;
 712         }
 713 }