libopkg/opkg_install.c

   1 /* opkg_install.c - the opkg package management system
   2
   3    Carl D. Worth
   4
   5    Copyright (C) 2001 University of Southern California
   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 "includes.h"
  19 #include <errno.h>
  20 #include <dirent.h>
  21 #include <glob.h>
  22 #include <time.h>
  23 #include <signal.h>
  24
  25 #include "pkg.h"
  26 #include "pkg_hash.h"
  27 #include "pkg_extract.h"
  28
  29 #include "opkg_install.h"
  30 #include "opkg_configure.h"
  31 #include "opkg_download.h"
  32 #include "opkg_remove.h"
  33
  34 #include "opkg_utils.h"
  35 #include "opkg_message.h"
  36 #include "opkg_cmd.h"
  37 #include "opkg_defines.h"
  38
  39 #include "sprintf_alloc.h"
  40 #include "file_util.h"
  41 #include "xsystem.h"
  42 #include "user.h"
  43 #include "libbb/libbb.h"
  44
  45 static int
  46 satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
  47 {
  48      int i, err;
  49      pkg_vec_t *depends = pkg_vec_alloc();
  50      pkg_t *dep;
  51      char **unresolved = NULL;
  52      int ndepends;
  53
  54      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
  55                                                         pkg, depends,
  56                                                         &unresolved);
  57
  58      if (unresolved) {
  59           opkg_message(conf, OPKG_ERROR,
  60                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
  61                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
  62           while (*unresolved) {
  63                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
  64                unresolved++;
  65           }
  66           opkg_message(conf, OPKG_ERROR, "\n");
  67           if (! conf->force_depends) {
  68                opkg_message(conf, OPKG_INFO,
  69                             "This could mean that your package list is out of date or that the packages\n"
  70                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
  71                             "of this problem try again with the '-force-depends' option.\n");
  72                pkg_vec_free(depends);
  73                return OPKG_PKG_DEPS_UNSATISFIED;
  74           }
  75      }
  76
  77      if (ndepends <= 0) {
  78           pkg_vec_free(depends);
  79           return 0;
  80      }
  81
  82      /* Mark packages as to-be-installed */
  83      for (i=0; i < depends->len; i++) {
  84           /* Dependencies should be installed the same place as pkg */
  85           if (depends->pkgs[i]->dest == NULL) {
  86                depends->pkgs[i]->dest = pkg->dest;
  87           }
  88           depends->pkgs[i]->state_want = SW_INSTALL;
  89      }
  90
  91      for (i = 0; i < depends->len; i++) {
  92           dep = depends->pkgs[i];
  93           /* The package was uninstalled when we started, but another
  94              dep earlier in this loop may have depended on it and pulled
  95              it in, so check first. */
  96           if ((dep->state_status != SS_INSTALLED)
  97               && (dep->state_status != SS_UNPACKED)) {
  98                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
  99                err = opkg_install_pkg(conf, dep,0);
 100                /* mark this package as having been automatically installed to
 101                 * satisfy a dependancy */
 102                dep->auto_installed = 1;
 103                if (err) {
 104                     pkg_vec_free(depends);
 105                     return err;
 106                }
 107           }
 108      }
 109
 110      pkg_vec_free(depends);
 111
 112      return 0;
 113 }
 114
 115 static int
 116 check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 117 {
 118      int i;
 119      pkg_vec_t *conflicts = NULL;
 120      int level;
 121      const char *prefix;
 122      if (conf->force_depends) {
 123           level = OPKG_NOTICE;
 124           prefix = "Warning";
 125      } else {
 126           level = OPKG_ERROR;
 127           prefix = "ERROR";
 128      }
 129
 130      if (!conf->force_depends)
 131           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 132
 133      if (conflicts) {
 134           opkg_message(conf, level,
 135                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 136           i = 0;
 137           while (i < conflicts->len)
 138                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 139           opkg_message(conf, level, "\n");
 140           pkg_vec_free(conflicts);
 141           return OPKG_PKG_DEPS_UNSATISFIED;
 142      }
 143      return 0;
 144 }
 145
 146 static int
 147 update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 148 {
 149      str_list_t *new_list, *old_list;
 150      str_list_elt_t *iter, *niter;
 151
 152      new_list = pkg_get_installed_files(conf, new_pkg);
 153      if (new_list == NULL)
 154              return -1;
 155
 156      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 157              iter;
 158              iter = niter, niter = str_list_next(new_list, niter)) {
 159           char *new_file = (char *)iter->data;
 160           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 161           if (!new_file)
 162                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 163           if (!owner || (owner == old_pkg))
 164                file_hash_set_file_owner(conf, new_file, new_pkg);
 165      }
 166
 167      if (old_pkg) {
 168           old_list = pkg_get_installed_files(conf, old_pkg);
 169           if (old_list == NULL) {
 170                   pkg_free_installed_files(new_pkg);
 171                   return -1;
 172           }
 173
 174           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 175                   iter;
 176                   iter = niter, niter = str_list_next(old_list, niter)) {
 177                char *old_file = (char *)iter->data;
 178                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 179                if (owner == old_pkg) {
 180                     /* obsolete */
 181                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 182                }
 183           }
 184           pkg_free_installed_files(old_pkg);
 185      }
 186      pkg_free_installed_files(new_pkg);
 187      return 0;
 188 }
 189
 190 static int
 191 verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 192 {
 193     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 194
 195     /* sma 6.20.02:  yup; here's the first bit */
 196     /*
 197      * XXX: BUG easy for cworth
 198      * 1) please point the call below to the correct current root destination
 199      * 2) we need to resolve how to check the required space for a pending pkg,
 200      *    my diddling with the .opk file size below isn't going to cut it.
 201      * 3) return a proper error code instead of 1
 202      */
 203      int comp_size, blocks_available;
 204      char *root_dir;
 205
 206      if (!conf->force_space && pkg->installed_size != NULL) {
 207           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 208           blocks_available = get_available_blocks(root_dir);
 209
 210           comp_size = strtoul(pkg->installed_size, NULL, 0);
 211           /* round up a blocks count without doing fancy-but-slow casting jazz */
 212           comp_size = (int)((comp_size + 1023) / 1024);
 213
 214           if (comp_size >= blocks_available) {
 215                opkg_message(conf, OPKG_ERROR,
 216                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 217                             blocks_available, root_dir, pkg->name, comp_size);
 218                return ENOSPC;
 219           }
 220      }
 221      return 0;
 222 }
 223
 224 static int
 225 unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 226 {
 227      int err;
 228      char *conffiles_file_name;
 229      char *root_dir;
 230      FILE *conffiles_file;
 231
 232      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 233
 234      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 235      if (pkg->tmp_unpack_dir == NULL) {
 236           opkg_message(conf, OPKG_ERROR,
 237                        "%s: Failed to create temporary directory '%s': %s\n",
 238                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 239           return errno;
 240      }
 241
 242      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 243      if (err) {
 244           return err;
 245      }
 246
 247      /* XXX: CLEANUP: There might be a cleaner place to read in the
 248         conffiles. Seems like I should be able to get everything to go
 249         through pkg_init_from_file. If so, maybe it would make sense to
 250         move all of unpack_pkg_control_files to that function. */
 251
 252      /* Don't need to re-read conffiles if we already have it */
 253      if (!nv_pair_list_empty(&pkg->conffiles)) {
 254           return 0;
 255      }
 256
 257      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 258      if (! file_exists(conffiles_file_name)) {
 259           free(conffiles_file_name);
 260           return 0;
 261      }
 262
 263      conffiles_file = fopen(conffiles_file_name, "r");
 264      if (conffiles_file == NULL) {
 265           fprintf(stderr, "%s: failed to open %s: %s\n",
 266                   __FUNCTION__, conffiles_file_name, strerror(errno));
 267           free(conffiles_file_name);
 268           return errno;
 269      }
 270      free(conffiles_file_name);
 271
 272      while (1) {
 273           char *cf_name;
 274           char *cf_name_in_dest;
 275
 276           cf_name = file_read_line_alloc(conffiles_file);
 277           if (cf_name == NULL) {
 278                break;
 279           }
 280           if (cf_name[0] == '\0') {
 281                continue;
 282           }
 283
 284           /* Prepend dest->root_dir to conffile name.
 285              Take pains to avoid multiple slashes. */
 286           root_dir = pkg->dest->root_dir;
 287           if (conf->offline_root)
 288                /* skip the offline_root prefix */
 289                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 290           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 291                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 292
 293           /* Can't get an md5sum now, (file isn't extracted yet).
 294              We'll wait until resolve_conffiles */
 295           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 296
 297           free(cf_name);
 298           free(cf_name_in_dest);
 299      }
 300
 301      fclose(conffiles_file);
 302
 303      return 0;
 304 }
 305
 306 /*
 307  * Remove packages which were auto_installed due to a dependency by old_pkg,
 308  * which are no longer a dependency in the new (upgraded) pkg.
 309  */
 310 static int
 311 pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 312 {
 313         int i, j, k, l, found;
 314         int n_deps;
 315         pkg_t *p;
 316         struct compound_depend *cd0, *cd1;
 317         abstract_pkg_t **dependents;
 318
 319         int count0 = old_pkg->pre_depends_count +
 320                                 old_pkg->depends_count +
 321                                 old_pkg->recommends_count +
 322                                 old_pkg->suggests_count;
 323         int count1 = pkg->pre_depends_count +
 324                                 pkg->depends_count +
 325                                 pkg->recommends_count +
 326                                 pkg->suggests_count;
 327
 328         for (i=0; i<count0; i++) {
 329                 cd0 = &old_pkg->depends[i];
 330                 if (cd0->type != DEPEND)
 331                         continue;
 332                 for (j=0; j<cd0->possibility_count; j++) {
 333
 334                         found = 0;
 335
 336                         for (k=0; k<count1; k++) {
 337                                 cd1 = &pkg->depends[i];
 338                                 if (cd1->type != DEPEND)
 339                                         continue;
 340                                 for (l=0; l<cd1->possibility_count; l++) {
 341                                         if (cd0->possibilities[j]
 342                                          == cd1->possibilities[l]) {
 343                                                 found = 1;
 344                                                 break;
 345                                         }
 346                                 }
 347                                 if (found)
 348                                         break;
 349                         }
 350
 351                         if (found)
 352                                 continue;
 353
 354                         /*
 355                          * old_pkg has a dependency that pkg does not.
 356                          */
 357                         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash,
 358                                         cd0->possibilities[j]->pkg->name);
 359
 360                         if (!p)
 361                                 continue;
 362
 363                         if (!p->auto_installed)
 364                                 continue;
 365
 366                         n_deps = pkg_has_installed_dependents(conf, NULL, p,
 367                                         &dependents);
 368                         n_deps--; /* don't count old_pkg */
 369
 370                         if (n_deps == 0) {
 371                                 opkg_message (conf, OPKG_NOTICE,
 372                                                 "%s was autoinstalled and is "
 373                                                 "now orphaned, removing.\n",
 374                                                 p->name);
 375
 376                                 /* p has one installed dependency (old_pkg),
 377                                  * which we need to ignore during removal. */
 378                                 p->state_flag |= SF_REPLACE;
 379
 380                                 opkg_remove_pkg(conf, p, 0);
 381                         } else
 382                                 opkg_message(conf, OPKG_INFO,
 383                                                 "%s was autoinstalled and is "
 384                                                 "still required by %d "
 385                                                 "installed packages.\n",
 386                                                 p->name, n_deps);
 387
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394 /* returns number of installed replacees */
 395 static int
 396 pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 397 {
 398      abstract_pkg_t **replaces = pkg->replaces;
 399      int replaces_count = pkg->replaces_count;
 400      int i, j;
 401      for (i = 0; i < replaces_count; i++) {
 402           abstract_pkg_t *ab_pkg = replaces[i];
 403           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 404           if (pkg_vec) {
 405                for (j = 0; j < pkg_vec->len; j++) {
 406                     pkg_t *replacee = pkg_vec->pkgs[j];
 407                     if (!pkg_conflicts(pkg, replacee))
 408                          continue;
 409                     if (replacee->state_status == SS_INSTALLED) {
 410                          pkg_vec_insert(installed_replacees, replacee);
 411                     }
 412                }
 413           }
 414      }
 415      return installed_replacees->len;
 416 }
 417
 418 static int
 419 pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 420 {
 421      int i;
 422      int replaces_count = replacees->len;
 423      for (i = 0; i < replaces_count; i++) {
 424           pkg_t *replacee = replacees->pkgs[i];
 425           int err;
 426           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 427           err = opkg_remove_pkg(conf, replacee,0);
 428           if (err)
 429                return err;
 430      }
 431      return 0;
 432 }
 433
 434 /* to unwind the removal: make sure they are installed */
 435 static int
 436 pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 437 {
 438      int i, err;
 439      int replaces_count = replacees->len;
 440      for (i = 0; i < replaces_count; i++) {
 441           pkg_t *replacee = replacees->pkgs[i];
 442           if (replacee->state_status != SS_INSTALLED) {
 443                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 444                err = opkg_install_pkg(conf, replacee,0);
 445                if (err)
 446                     return err;
 447           }
 448      }
 449      return 0;
 450 }
 451
 452 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 453 static int
 454 opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 455 {
 456      if (old_pkg) {
 457           char message_out[15];
 458           char *old_version = pkg_version_str_alloc(old_pkg);
 459           char *new_version = pkg_version_str_alloc(pkg);
 460           int cmp = pkg_compare_versions(old_pkg, pkg);
 461           int rc = 0;
 462
 463           memset(message_out,'\x0',15);
 464           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 465           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 466              cmp = -1 ;                                       /* then we force opkg to downgrade */
 467              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 468                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 469           }
 470
 471           if (cmp > 0) {
 472                opkg_message(conf, OPKG_NOTICE,
 473                             "Not downgrading package %s on %s from %s to %s.\n",
 474                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 475                rc = 1;
 476           } else if (cmp < 0) {
 477                opkg_message(conf, OPKG_NOTICE,
 478                             "%s%s on %s from %s to %s...\n",
 479                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 480                pkg->dest = old_pkg->dest;
 481                rc = 0;
 482           } else /* cmp == 0 */ {
 483                if (conf->force_reinstall) {
 484                     opkg_message(conf, OPKG_NOTICE,
 485                                  "Reinstalling %s (%s) on %s...\n",
 486                                  pkg->name, new_version, old_pkg->dest->name);
 487                     pkg->dest = old_pkg->dest;
 488                     rc = 0;
 489                } else {
 490                     opkg_message(conf, OPKG_NOTICE,
 491                                  "Not installing %s (%s) on %s -- already installed.\n",
 492                                  pkg->name, new_version, old_pkg->dest->name);
 493                     rc = 1;
 494                }
 495           }
 496           free(old_version);
 497           free(new_version);
 498           return rc;
 499      } else {
 500       char message_out[15] ;
 501       memset(message_out,'\x0',15);
 502       if ( message )
 503           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 504       else
 505           strncpy( message_out,"Installing ",strlen("Installing ") );
 506           char *version = pkg_version_str_alloc(pkg);
 507
 508           opkg_message(conf, OPKG_NOTICE,
 509                        "%s%s (%s) to %s...\n", message_out,
 510                        pkg->name, version, pkg->dest->name);
 511           free(version);
 512           return 0;
 513      }
 514 }
 515
 516
 517 static int
 518 prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 519 {
 520      /* DPKG_INCOMPATIBILITY:
 521         dpkg does some things here that we don't do yet. Do we care?
 522
 523         1. If a version of the package is already installed, call
 524            old-prerm upgrade new-version
 525         2. If the script runs but exits with a non-zero exit status
 526            new-prerm failed-upgrade old-version
 527            Error unwind, for both the above cases:
 528            old-postinst abort-upgrade new-version
 529      */
 530      return 0;
 531 }
 532
 533 static int
 534 prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 535 {
 536      /* DPKG_INCOMPATIBILITY:
 537         dpkg does some things here that we don't do yet. Do we care?
 538         (See prerm_upgrade_old_package for details)
 539      */
 540      return 0;
 541 }
 542
 543 static int
 544 prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
 545 {
 546      /* DPKG_INCOMPATIBILITY:
 547         dpkg does some things here that we don't do yet. Do we care?
 548         2. If a 'conflicting' package is being removed at the same time:
 549                 1. If any packages depended on that conflicting package and
 550                    --auto-deconfigure is specified, call, for each such package:
 551                    deconfigured's-prerm deconfigure \
 552                    in-favour package-being-installed version \
 553                    removing conflicting-package version
 554                 Error unwind:
 555                    deconfigured's-postinst abort-deconfigure \
 556                    in-favour package-being-installed-but-failed version \
 557                    removing conflicting-package version
 558
 559                    The deconfigured packages are marked as requiring
 560                    configuration, so that if --install is used they will be
 561                    configured again if possible.
 562                 2. To prepare for removal of the conflicting package, call:
 563                    conflictor's-prerm remove in-favour package new-version
 564                 Error unwind:
 565                    conflictor's-postinst abort-remove in-favour package new-version
 566      */
 567      return 0;
 568 }
 569
 570 static int
 571 prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
 572 {
 573      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
 574         do yet. Do we care?  (See prerm_deconfigure_conflictors for
 575         details) */
 576      return 0;
 577 }
 578
 579 static int
 580 preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 581 {
 582      int err;
 583      char *preinst_args;
 584
 585      if (old_pkg) {
 586           char *old_version = pkg_version_str_alloc(old_pkg);
 587           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
 588           free(old_version);
 589      } else if (pkg->state_status == SS_CONFIG_FILES) {
 590           char *pkg_version = pkg_version_str_alloc(pkg);
 591           sprintf_alloc(&preinst_args, "install %s", pkg_version);
 592           free(pkg_version);
 593      } else {
 594           preinst_args = xstrdup("install");
 595      }
 596
 597      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
 598      if (err) {
 599           opkg_message(conf, OPKG_ERROR,
 600                        "Aborting installation of %s\n", pkg->name);
 601           return 1;
 602      }
 603
 604      free(preinst_args);
 605
 606      return 0;
 607 }
 608
 609 static int
 610 preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 611 {
 612      /* DPKG_INCOMPATIBILITY:
 613         dpkg does the following error unwind, should we?
 614         pkg->postrm abort-upgrade old-version
 615         OR pkg->postrm abort-install old-version
 616         OR pkg->postrm abort-install
 617      */
 618      return 0;
 619 }
 620
 621 static char *
 622 backup_filename_alloc(const char *file_name)
 623 {
 624      char *backup;
 625
 626      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
 627
 628      return backup;
 629 }
 630
 631
 632 static int
 633 backup_make_backup(opkg_conf_t *conf, const char *file_name)
 634 {
 635      int err;
 636      char *backup;
 637
 638      backup = backup_filename_alloc(file_name);
 639      err = file_copy(file_name, backup);
 640      if (err) {
 641           opkg_message(conf, OPKG_ERROR,
 642                        "%s: Failed to copy %s to %s\n",
 643                        __FUNCTION__, file_name, backup);
 644      }
 645
 646      free(backup);
 647
 648      return err;
 649 }
 650
 651 static int
 652 backup_exists_for(const char *file_name)
 653 {
 654      int ret;
 655      char *backup;
 656
 657      backup = backup_filename_alloc(file_name);
 658
 659      ret = file_exists(backup);
 660
 661      free(backup);
 662
 663      return ret;
 664 }
 665
 666 static int
 667 backup_remove(const char *file_name)
 668 {
 669      char *backup;
 670
 671      backup = backup_filename_alloc(file_name);
 672      unlink(backup);
 673      free(backup);
 674
 675      return 0;
 676 }
 677
 678 static int
 679 backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 680 {
 681      int err;
 682      conffile_list_elt_t *iter;
 683      conffile_t *cf;
 684
 685      if (conf->noaction) return 0;
 686
 687      /* Backup all modified conffiles */
 688      if (old_pkg) {
 689           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
 690                char *cf_name;
 691
 692                cf = iter->data;
 693                cf_name = root_filename_alloc(conf, cf->name);
 694
 695                /* Don't worry if the conffile is just plain gone */
 696                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
 697                     err = backup_make_backup(conf, cf_name);
 698                     if (err) {
 699                          return err;
 700                     }
 701                }
 702                free(cf_name);
 703           }
 704      }
 705
 706      /* Backup all conffiles that were not conffiles in old_pkg */
 707      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
 708           char *cf_name;
 709           cf = (conffile_t *)iter->data;
 710           cf_name = root_filename_alloc(conf, cf->name);
 711           /* Ignore if this was a conffile in old_pkg as well */
 712           if (pkg_get_conffile(old_pkg, cf->name)) {
 713                continue;
 714           }
 715
 716           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
 717                err = backup_make_backup(conf, cf_name);
 718                if (err) {
 719                     return err;
 720                }
 721           }
 722           free(cf_name);
 723      }
 724
 725      return 0;
 726 }
 727
 728 static int
 729 backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 730 {
 731      conffile_list_elt_t *iter;
 732
 733      if (old_pkg) {
 734           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
 735                backup_remove(((nv_pair_t *)iter->data)->name);
 736           }
 737      }
 738
 739      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
 740           backup_remove(((nv_pair_t *)iter->data)->name);
 741      }
 742
 743      return 0;
 744 }
 745
 746
 747 static int
 748 check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 749 {
 750      /* DPKG_INCOMPATIBILITY:
 751         opkg takes a slightly different approach than dpkg at this
 752         point.  dpkg installs each file in the new package while
 753         creating a backup for any file that is replaced, (so that it
 754         can unwind if necessary).  To avoid complexity and redundant
 755         storage, opkg doesn't do any installation until later, (at the
 756         point at which dpkg removes the backups.
 757
 758         But, we do have to check for data file clashes, since after
 759         installing a package with a file clash, removing either of the
 760         packages involved in the clash has the potential to break the
 761         other package.
 762      */
 763      str_list_t *files_list;
 764      str_list_elt_t *iter, *niter;
 765
 766      int clashes = 0;
 767
 768      files_list = pkg_get_installed_files(conf, pkg);
 769      if (files_list == NULL)
 770              return -1;
 771
 772      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
 773              iter;
 774              iter = niter, niter = str_list_next(files_list, iter)) {
 775           char *root_filename;
 776           char *filename = (char *) iter->data;
 777           root_filename = root_filename_alloc(conf, filename);
 778           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
 779                pkg_t *owner;
 780                pkg_t *obs;
 781                /* Pre-existing conffiles are OK */
 782                /* @@@@ should have way to check that it is a conffile -Jamey */
 783                if (backup_exists_for(root_filename)) {
 784                     continue;
 785                }
 786
 787                /* Pre-existing files are OK if force-overwrite was asserted. */
 788                if (conf->force_overwrite) {
 789                     /* but we need to change who owns this file */
 790                     file_hash_set_file_owner(conf, filename, pkg);
 791                     continue;
 792                }
 793
 794                owner = file_hash_get_file_owner(conf, filename);
 795
 796                /* Pre-existing files are OK if owned by the pkg being upgraded. */
 797                if (owner && old_pkg) {
 798                     if (strcmp(owner->name, old_pkg->name) == 0) {
 799                          continue;
 800                     }
 801                }
 802
 803                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
 804                if (owner) {
 805                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
 806                     if (pkg_replaces(pkg, owner)) {
 807                          continue;
 808                     }
 809 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
 810    then it's ok to overwrite. */
 811                     if (strcmp(owner->name,pkg->name)==0){
 812                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
 813                          continue;
 814                     }
 815                }
 816
 817                /* Pre-existing files are OK if they are obsolete */
 818                obs = hash_table_get(&conf->obs_file_hash, filename);
 819                if (obs) {
 820                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
 821                     continue;
 822                }
 823
 824                /* We have found a clash. */
 825                opkg_message(conf, OPKG_ERROR,
 826                             "Package %s wants to install file %s\n"
 827                             "\tBut that file is already provided by package ",
 828                             pkg->name, filename);
 829                if (owner) {
 830                     opkg_message(conf, OPKG_ERROR,
 831                                  "%s\n", owner->name);
 832                } else {
 833                     opkg_message(conf, OPKG_ERROR,
 834                                  "<no package>\nPlease move this file out of the way and try again.\n");
 835                }
 836                clashes++;
 837           }
 838           free(root_filename);
 839      }
 840      pkg_free_installed_files(pkg);
 841
 842      return clashes;
 843 }
 844
 845 /*
 846  * XXX: This function sucks, as does the below comment.
 847  */
 848 static int
 849 check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 850 {
 851     /* Basically that's the worst hack I could do to be able to change ownership of
 852        file list, but, being that we have no way to unwind the mods, due to structure
 853        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
 854        What we do here is change the ownership of file in hash if a replace ( or similar events
 855        happens )
 856        Only the action that are needed to change name should be considered.
 857        @@@ To change after 1.0 release.
 858      */
 859      str_list_t *files_list;
 860      str_list_elt_t *iter, *niter;
 861
 862      char *root_filename = NULL;
 863
 864      files_list = pkg_get_installed_files(conf, pkg);
 865      if (files_list == NULL)
 866              return -1;
 867
 868      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
 869              iter;
 870              iter = niter, niter = str_list_next(files_list, niter)) {
 871           char *filename = (char *) iter->data;
 872           if (root_filename) {
 873               free(root_filename);
 874               root_filename = NULL;
 875           }
 876           root_filename = root_filename_alloc(conf, filename);
 877           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
 878                pkg_t *owner;
 879
 880                owner = file_hash_get_file_owner(conf, filename);
 881
 882                if (conf->force_overwrite) {
 883                     /* but we need to change who owns this file */
 884                     file_hash_set_file_owner(conf, filename, pkg);
 885                     continue;
 886                }
 887
 888
 889                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
 890                if (owner) {
 891                     if (pkg_replaces(pkg, owner)) {
 892 /* It's now time to change the owner of that file.
 893    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
 894                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
 895                          file_hash_set_file_owner(conf, filename, pkg);
 896                          continue;
 897                     }
 898                }
 899
 900           }
 901      }
 902      if (root_filename) {
 903          free(root_filename);
 904          root_filename = NULL;
 905      }
 906      pkg_free_installed_files(pkg);
 907
 908      return 0;
 909 }
 910
 911 static int
 912 check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 913 {
 914      /* Nothing to do since check_data_file_clashes doesn't change state */
 915      return 0;
 916 }
 917
 918 static int
 919 postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 920 {
 921      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
 922         1. If the package is being upgraded, call
 923            old-postrm upgrade new-version
 924         2. If this fails, attempt:
 925            new-postrm failed-upgrade old-version
 926         Error unwind, for both cases:
 927            old-preinst abort-upgrade new-version    */
 928      return 0;
 929 }
 930
 931 static int
 932 postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 933 {
 934      /* DPKG_INCOMPATIBILITY:
 935         dpkg does some things here that we don't do yet. Do we care?
 936         (See postrm_upgrade_old_pkg for details)
 937      */
 938     return 0;
 939 }
 940
 941 static int
 942 remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 943 {
 944      int err;
 945      str_list_t *old_files;
 946      str_list_elt_t *of;
 947      str_list_t *new_files;
 948      str_list_elt_t *nf;
 949      hash_table_t new_files_table;
 950
 951      old_files = pkg_get_installed_files(conf, old_pkg);
 952      if (old_files == NULL)
 953           return -1;
 954
 955      new_files = pkg_get_installed_files(conf, pkg);
 956      if (new_files == NULL) {
 957           pkg_free_installed_files(old_pkg);
 958           return -1;
 959      }
 960
 961      new_files_table.entries = NULL;
 962      hash_table_init("new_files" , &new_files_table, 20);
 963      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
 964          if (nf && nf->data)
 965             hash_table_insert(&new_files_table, nf->data, nf->data);
 966      }
 967
 968      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
 969           pkg_t *owner;
 970           char *old, *new;
 971           old = (char *)of->data;
 972           new = (char *) hash_table_get (&new_files_table, old);
 973           if (new)
 974                continue;
 975
 976           if (file_is_dir(old)) {
 977                continue;
 978           }
 979           owner = file_hash_get_file_owner(conf, old);
 980           if (owner != old_pkg) {
 981                /* in case obsolete file no longer belongs to old_pkg */
 982                continue;
 983           }
 984
 985           /* old file is obsolete */
 986           opkg_message(conf, OPKG_INFO,
 987                        "    removing obsolete file %s\n", old);
 988           if (!conf->noaction) {
 989                err = unlink(old);
 990                if (err) {
 991                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
 992                                  strerror(errno));
 993                }
 994           }
 995      }
 996
 997      hash_table_deinit(&new_files_table);
 998      pkg_free_installed_files(old_pkg);
 999      pkg_free_installed_files(pkg);
1000
1001      return 0;
1002 }
1003
1004 static int
1005 install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1006 {
1007      int ret;
1008      char *prefix;
1009
1010      sprintf_alloc(&prefix, "%s.", pkg->name);
1011      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1012                                                         pkg->dest->info_dir,
1013                                                         prefix);
1014      free(prefix);
1015      return ret;
1016 }
1017
1018 static int
1019 remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1020 {
1021      /* DPKG_INCOMPATIBILITY:
1022         This is a fairly sophisticated dpkg operation. Shall we
1023         skip it? */
1024
1025      /* Any packages all of whose files have been overwritten during the
1026         installation, and which aren't required for dependencies, are
1027         considered to have been removed. For each such package
1028         1. disappearer's-postrm disappear overwriter overwriter-version
1029         2. The package's maintainer scripts are removed
1030         3. It is noted in the status database as being in a sane state,
1031            namely not installed (any conffiles it may have are ignored,
1032            rather than being removed by dpkg). Note that disappearing
1033            packages do not have their prerm called, because dpkg doesn't
1034            know in advance that the package is going to vanish.
1035      */
1036      return 0;
1037 }
1038
1039 static int
1040 install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1041 {
1042      int err;
1043
1044      /* opkg takes a slightly different approach to data file backups
1045         than dpkg. Rather than removing backups at this point, we
1046         actually do the data file installation now. See comments in
1047         check_data_file_clashes() for more details. */
1048
1049      opkg_message(conf, OPKG_INFO,
1050                   "    extracting data files to %s\n", pkg->dest->root_dir);
1051      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1052      if (err) {
1053           return err;
1054      }
1055
1056      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1057         so we can't save ourself from removing important packages
1058         At this point we (should) have extracted the .control file, so it
1059         would be a good idea to reload the data in it, and set the Essential
1060         state in *pkg. From now on the Essential is back in status file and
1061         we can protect again.
1062         We should operate this way:
1063         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1064         check for "Essential" in it
1065         set the value in pkg->essential.
1066         This new routine could be useful also for every other flag
1067         Pigi: 16/03/2004 */
1068      set_flags_from_control(conf, pkg) ;
1069
1070      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1071      err = pkg_write_filelist(conf, pkg);
1072      if (err)
1073           return err;
1074
1075      /* XXX: FEATURE: opkg should identify any files which existed
1076         before installation and which were overwritten, (see
1077         check_data_file_clashes()). What it must do is remove any such
1078         files from the filelist of the old package which provided the
1079         file. Otherwise, if the old package were removed at some point
1080         it would break the new package. Removing the new package will
1081         also break the old one, but this cannot be helped since the old
1082         package's file has already been deleted. This is the importance
1083         of check_data_file_clashes(), and only allowing opkg to install
1084         a clashing package with a user force. */
1085
1086      return 0;
1087 }
1088
1089 static int
1090 user_prefers_old_conffile(const char *file_name, const char *backup)
1091 {
1092      char *response;
1093      const char *short_file_name;
1094
1095      short_file_name = strrchr(file_name, '/');
1096      if (short_file_name) {
1097           short_file_name++;
1098      } else {
1099           short_file_name = file_name;
1100      }
1101
1102      while (1) {
1103           response = get_user_response("    Configuration file '%s'\n"
1104                                        "    ==> File on system created by you or by a script.\n"
1105                                        "    ==> File also in package provided by package maintainer.\n"
1106                                        "       What would you like to do about it ?  Your options are:\n"
1107                                        "        Y or I  : install the package maintainer's version\n"
1108                                        "        N or O  : keep your currently-installed version\n"
1109                                        "          D     : show the differences between the versions (if diff is installed)\n"
1110                                        "     The default action is to keep your current version.\n"
1111                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1112
1113           if (response == NULL)
1114                   return 1;
1115
1116           if (strcmp(response, "y") == 0
1117               || strcmp(response, "i") == 0
1118               || strcmp(response, "yes") == 0) {
1119                free(response);
1120                return 0;
1121           }
1122
1123           if (strcmp(response, "d") == 0) {
1124                const char *argv[] = {"diff", "-u", backup, file_name, NULL};
1125                xsystem(argv);
1126                printf("    [Press ENTER to continue]\n");
1127                response = file_read_line_alloc(stdin);
1128                free(response);
1129                continue;
1130           }
1131
1132           free(response);
1133           return 1;
1134      }
1135 }
1136
1137 static int
1138 resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1139 {
1140      conffile_list_elt_t *iter;
1141      conffile_t *cf;
1142      char *cf_backup;
1143      char *md5sum;
1144
1145      if (conf->noaction) return 0;
1146
1147      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1148           char *root_filename;
1149           cf = (conffile_t *)iter->data;
1150           root_filename = root_filename_alloc(conf, cf->name);
1151
1152           /* Might need to initialize the md5sum for each conffile */
1153           if (cf->value == NULL) {
1154                cf->value = file_md5sum_alloc(root_filename);
1155           }
1156
1157           if (!file_exists(root_filename)) {
1158                free(root_filename);
1159                continue;
1160           }
1161
1162           cf_backup = backup_filename_alloc(root_filename);
1163
1164
1165           if (file_exists(cf_backup)) {
1166               /* Let's compute md5 to test if files are changed */
1167               md5sum = file_md5sum_alloc(cf_backup);
1168               if (md5sum && cf->value && strcmp(cf->value,md5sum) != 0 ) {
1169                   if (conf->force_maintainer) {
1170                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1171                   } else if (conf->force_defaults
1172                           || user_prefers_old_conffile(root_filename, cf_backup) ) {
1173                       rename(cf_backup, root_filename);
1174                   }
1175               }
1176               unlink(cf_backup);
1177               if (md5sum)
1178                   free(md5sum);
1179           }
1180
1181           free(cf_backup);
1182           free(root_filename);
1183      }
1184
1185      return 0;
1186 }
1187
1188
1189 opkg_error_t
1190 opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
1191 {
1192      int cmp, err = 0;
1193      pkg_t *old, *new;
1194      char *old_version, *new_version;
1195
1196      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
1197      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
1198      if ( old )
1199         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
1200
1201      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
1202      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
1203      if ( new )
1204         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
1205
1206 /* Pigi Basically here is broken the version stuff.
1207    What's happening is that nothing provide the version to differents
1208    functions, so the returned struct is always the latest.
1209    That's why the install by name don't work.
1210 */
1211      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
1212
1213      if ( old )
1214         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
1215      if ( new )
1216         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
1217      opkg_message(conf, OPKG_DEBUG2, " \n");
1218
1219      if (new == NULL) {
1220           if (err)
1221             return err;
1222           else
1223             return OPKG_PKG_HAS_NO_CANDIDATE;
1224      }
1225
1226      new->state_flag |= SF_USER;
1227      if (old) {
1228           old_version = pkg_version_str_alloc(old);
1229           new_version = pkg_version_str_alloc(new);
1230
1231           cmp = pkg_compare_versions(old, new);
1232           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
1233              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
1234              cmp = -1 ;                                       /* then we force opkg to downgrade */
1235                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
1236                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
1237           }
1238           opkg_message(conf, OPKG_DEBUG,
1239                        "Comparing visible versions of pkg %s:"
1240                        "\n\t%s is installed "
1241                        "\n\t%s is available "
1242                        "\n\t%d was comparison result\n",
1243                        pkg_name, old_version, new_version, cmp);
1244           if (cmp == 0 && !conf->force_reinstall) {
1245                opkg_message(conf, OPKG_NOTICE,
1246                             "Package %s (%s) installed in %s is up to date.\n",
1247                             old->name, old_version, old->dest->name);
1248                free(old_version);
1249                free(new_version);
1250                return 0;
1251           } else if (cmp > 0) {
1252                opkg_message(conf, OPKG_NOTICE,
1253                             "Not downgrading package %s on %s from %s to %s.\n",
1254                             old->name, old->dest->name, old_version, new_version);
1255                free(old_version);
1256                free(new_version);
1257                return 0;
1258           } else if (cmp < 0) {
1259                new->dest = old->dest;
1260                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
1261           }
1262           free(old_version);
1263           free(new_version);
1264      }
1265
1266      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
1267         supposed to be an opkg_error_t, but opkg_install_pkg could
1268         return any kind of integer, (might be errno from a syscall,
1269         etc.). This is a real mess and will need to be cleaned up if
1270         anyone ever wants to make a nice libopkg. */
1271
1272      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
1273      return opkg_install_pkg(conf, new,0);
1274 }
1275
1276 /**
1277  *  @brief Really install a pkg_t
1278  */
1279 int
1280 opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
1281 {
1282      int err = 0;
1283      int message = 0;
1284      pkg_t *old_pkg = NULL;
1285      pkg_vec_t *replacees;
1286      abstract_pkg_t *ab_pkg = NULL;
1287      int old_state_flag;
1288      char* file_md5;
1289 #ifdef HAVE_SHA256
1290      char* file_sha256;
1291 #endif
1292
1293      if ( from_upgrade )
1294         message = 1;            /* Coming from an upgrade, and should change the output message */
1295
1296      if (!pkg) {
1297           opkg_message(conf, OPKG_ERROR,
1298                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
1299           return OPKG_INSTALL_ERR_INTERNAL;
1300      }
1301
1302      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
1303
1304      if (!pkg_arch_supported(conf, pkg)) {
1305           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
1306                        pkg->architecture, pkg->name);
1307           return OPKG_INSTALL_ERR_INTERNAL;
1308      }
1309      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
1310           err = satisfy_dependencies_for(conf, pkg);
1311           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
1312
1313           opkg_message(conf, OPKG_NOTICE,
1314                        "Package %s is already installed in %s.\n",
1315                        pkg->name, pkg->dest->name);
1316           return 0;
1317      }
1318
1319      if (pkg->dest == NULL) {
1320           pkg->dest = conf->default_dest;
1321      }
1322
1323      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
1324
1325      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
1326      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
1327
1328      pkg->state_want = SW_INSTALL;
1329      if (old_pkg){
1330          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
1331      }
1332
1333
1334      /* Abhaya: conflicts check */
1335      err = check_conflicts_for(conf, pkg);
1336      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
1337
1338      /* this setup is to remove the upgrade scenario in the end when
1339         installing pkg A, A deps B & B deps on A. So both B and A are
1340         installed. Then A's installation is started resulting in an
1341         uncecessary upgrade */
1342      if (pkg->state_status == SS_INSTALLED
1343          && conf->force_reinstall == 0) return 0;
1344
1345      err = verify_pkg_installable(conf, pkg);
1346      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
1347
1348      if (pkg->local_filename == NULL) {
1349           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
1350           if (err) {
1351                opkg_message(conf, OPKG_ERROR,
1352                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
1353                             pkg->name);
1354                return OPKG_INSTALL_ERR_DOWNLOAD;
1355           }
1356      }
1357
1358      /* check that the repository is valid */
1359      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
1360      char *list_file_name, *sig_file_name, *lists_dir;
1361
1362      /* check to ensure the package has come from a repository */
1363      if (conf->check_signature && pkg->src)
1364      {
1365        sprintf_alloc (&lists_dir, "%s",
1366                      (conf->restrict_to_default_dest)
1367                       ? conf->default_dest->lists_dir
1368                       : conf->lists_dir);
1369        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
1370        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
1371
1372        if (file_exists (sig_file_name))
1373        {
1374          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
1375            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
1376                            list_file_name);
1377            return OPKG_INSTALL_ERR_SIGNATURE;
1378          }
1379        }else{
1380          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
1381                          "Perhaps you need to run 'opkg update'?\n");
1382          return OPKG_INSTALL_ERR_SIGNATURE;
1383        }
1384
1385        free (lists_dir);
1386        free (list_file_name);
1387        free (sig_file_name);
1388      }
1389      #endif
1390
1391      /* Check for md5 values */
1392      if (pkg->md5sum)
1393      {
1394          file_md5 = file_md5sum_alloc(pkg->local_filename);
1395          if (file_md5 && strcmp(file_md5, pkg->md5sum))
1396          {
1397               opkg_message(conf, OPKG_ERROR,
1398                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
1399                            pkg->name);
1400               free(file_md5);
1401               return OPKG_INSTALL_ERR_MD5;
1402          }
1403          if (file_md5)
1404               free(file_md5);
1405      }
1406
1407 #ifdef HAVE_SHA256
1408      /* Check for sha256 value */
1409      if(pkg->sha256sum)
1410      {
1411          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
1412          if (file_sha256 && strcmp(file_sha256, pkg->sha256sum))
1413          {
1414               opkg_message(conf, OPKG_ERROR,
1415                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
1416                            pkg->name);
1417               free(file_sha256);
1418               return OPKG_INSTALL_ERR_SHA256;
1419          }
1420          if (file_sha256)
1421               free(file_sha256);
1422      }
1423 #endif
1424
1425      if (pkg->tmp_unpack_dir == NULL) {
1426           if (unpack_pkg_control_files(conf, pkg) == -1) {
1427                opkg_message(conf, OPKG_ERROR, "Failed to unpack control"
1428                               " files from %s.\n", pkg->local_filename);
1429                return -1;
1430           }
1431      }
1432
1433      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
1434 /* Pigi: check if it will pass from here when replacing. It seems to fail */
1435 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
1436      err = update_file_ownership(conf, pkg, old_pkg);
1437      if (err) { return OPKG_ERR_UNKNOWN; }
1438
1439      if (conf->nodeps == 0) {
1440           err = satisfy_dependencies_for(conf, pkg);
1441           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
1442           if (pkg->state_status == SS_UNPACKED)
1443                /* Circular dependency has installed it for us. */
1444                return 0;
1445      }
1446
1447      replacees = pkg_vec_alloc();
1448      pkg_get_installed_replacees(conf, pkg, replacees);
1449
1450      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
1451      {
1452           sigset_t newset, oldset;
1453
1454           sigemptyset(&newset);
1455           sigaddset(&newset, SIGINT);
1456           sigprocmask(SIG_BLOCK, &newset, &oldset);
1457
1458           opkg_state_changed++;
1459           pkg->state_flag |= SF_FILELIST_CHANGED;
1460
1461           if (old_pkg)
1462                pkg_remove_orphan_dependent(conf, pkg, old_pkg);
1463
1464           /* XXX: BUG: we really should treat replacement more like an upgrade
1465            *      Instead, we're going to remove the replacees
1466            */
1467           err = pkg_remove_installed_replacees(conf, replacees);
1468           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
1469
1470           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
1471           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
1472
1473           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
1474           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
1475
1476           err = preinst_configure(conf, pkg, old_pkg);
1477           if (err) goto UNWIND_PREINST_CONFIGURE;
1478
1479           err = backup_modified_conffiles(conf, pkg, old_pkg);
1480           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
1481
1482           err = check_data_file_clashes(conf, pkg, old_pkg);
1483           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
1484
1485           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
1486           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
1487
1488           if (conf->noaction) return 0;
1489
1490           /* point of no return: no unwinding after this */
1491           if (old_pkg && !conf->force_reinstall) {
1492                old_pkg->state_want = SW_DEINSTALL;
1493
1494                if (old_pkg->state_flag & SF_NOPRUNE) {
1495                     opkg_message(conf, OPKG_INFO,
1496                                  "  not removing obsolesced files because package marked noprune\n");
1497                } else {
1498                     opkg_message(conf, OPKG_INFO,
1499                                  "  removing obsolesced files\n");
1500                     if (remove_obsolesced_files(conf, pkg, old_pkg)) {
1501                         opkg_message(conf, OPKG_ERROR, "Failed to determine "
1502                                         "obsolete files from previously "
1503                                         "installed %s\n", old_pkg->name);
1504                     }
1505                }
1506
1507                /* removing files from old package, to avoid ghost files */
1508                remove_data_files_and_list(conf, old_pkg);
1509                remove_maintainer_scripts(conf, old_pkg);
1510           }
1511
1512
1513           opkg_message(conf, OPKG_INFO,
1514                        "  installing maintainer scripts\n");
1515           if (install_maintainer_scripts(conf, pkg, old_pkg)) {
1516                 opkg_message(conf, OPKG_ERROR, "Failed to extract maintainer"
1517                                " scripts for %s. Package debris may remain!\n",
1518                                pkg->name);
1519                 goto pkg_is_hosed;
1520           }
1521
1522           /* the following just returns 0 */
1523           remove_disappeared(conf, pkg);
1524
1525           opkg_message(conf, OPKG_INFO,
1526                        "  installing data files\n");
1527
1528           if (install_data_files(conf, pkg)) {
1529                 opkg_message(conf, OPKG_ERROR, "Failed to extract data files "
1530                                "for %s. Package debris may remain!\n",
1531                                pkg->name);
1532                 goto pkg_is_hosed;
1533           }
1534
1535           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1536           if (err) {
1537                 opkg_message(conf, OPKG_ERROR,
1538                                 "check_data_file_clashes_change() failed for "
1539                                "for files belonging to %s.\n",
1540                                pkg->name);
1541           }
1542
1543           opkg_message(conf, OPKG_INFO,
1544                        "  resolving conf files\n");
1545           resolve_conffiles(conf, pkg);
1546
1547           pkg->state_status = SS_UNPACKED;
1548           old_state_flag = pkg->state_flag;
1549           pkg->state_flag &= ~SF_PREFER;
1550           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1551
1552           if (old_pkg && !conf->force_reinstall) {
1553                old_pkg->state_status = SS_NOT_INSTALLED;
1554           }
1555
1556           time(&pkg->installed_time);
1557
1558           ab_pkg = pkg->parent;
1559           if (ab_pkg)
1560                ab_pkg->state_status = pkg->state_status;
1561
1562           opkg_message(conf, OPKG_INFO, "Done.\n");
1563
1564           sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1565           pkg_vec_free (replacees);
1566           return 0;
1567
1568
1569      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1570           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1571      UNWIND_CHECK_DATA_FILE_CLASHES:
1572           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1573      UNWIND_BACKUP_MODIFIED_CONFFILES:
1574           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1575      UNWIND_PREINST_CONFIGURE:
1576           preinst_configure_unwind(conf, pkg, old_pkg);
1577      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1578           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1579      UNWIND_PRERM_UPGRADE_OLD_PKG:
1580           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1581      UNWIND_REMOVE_INSTALLED_REPLACEES:
1582           pkg_remove_installed_replacees_unwind(conf, replacees);
1583
1584 pkg_is_hosed:
1585           opkg_message(conf, OPKG_INFO,
1586                        "Failed.\n");
1587
1588           sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1589
1590           pkg_vec_free (replacees);
1591           return OPKG_ERR_UNKNOWN;
1592      }
1593 }