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 #ifndef __USE_GNU
  25 typedef void (*sighandler_t)(int);
  26 #endif
  27
  28 #include "pkg.h"
  29 #include "pkg_hash.h"
  30 #include "pkg_extract.h"
  31
  32 #include "opkg_install.h"
  33 #include "opkg_configure.h"
  34 #include "opkg_download.h"
  35 #include "opkg_remove.h"
  36
  37 #include "opkg_utils.h"
  38 #include "opkg_message.h"
  39 #include "opkg_state.h"
  40 #include "opkg_defines.h"
  41
  42 #include "sprintf_alloc.h"
  43 #include "file_util.h"
  44 #include "str_util.h"
  45 #include "xsystem.h"
  46 #include "user.h"
  47
  48 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
  49 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
  50
  51 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  52 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  53 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  54 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  55 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  56 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  57 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  58 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  59 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  60 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  61 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  62 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  63 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  64
  65 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  66 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  67 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
  68 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
  69 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
  70
  71 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
  72
  73 static int user_prefers_old_conffile(const char *file, const char *backup);
  74
  75 static char *backup_filename_alloc(const char *file_name);
  76 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
  77 static int backup_exists_for(const char *file_name);
  78 static int backup_remove(const char *file_name);
  79
  80
  81 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
  82 {
  83      int err, cmp;
  84      pkg_t *pkg, *old;
  85      char *old_version, *new_version;
  86
  87      pkg = pkg_new();
  88      if (pkg == NULL) {
  89           return ENOMEM;
  90      }
  91
  92      err = pkg_init_from_file(pkg, filename);
  93      if (err) {
  94           return err;
  95      }
  96
  97      if (!pkg->architecture) {
  98           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
  99           return -EINVAL;
 100      }
 101
 102      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
 103         freeing the pkg that we pass in. It might be nice to clean this up
 104         if possible.  */
 105      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 106      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 107
 108      pkg->local_filename = strdup(filename);
 109
 110      if (old) {
 111           old_version = pkg_version_str_alloc(old);
 112           new_version = pkg_version_str_alloc(pkg);
 113
 114           cmp = pkg_compare_versions(old, pkg);
 115           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 116              cmp = -1 ;                                       /* then we force opkg to downgrade */
 117                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 118                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 119           }
 120           if (cmp > 0) {
 121                  opkg_message(conf, OPKG_NOTICE,
 122                               "Not downgrading package %s on %s from %s to %s.\n",
 123                               old->name, old->dest->name, old_version, new_version);
 124                  pkg->state_want = SW_DEINSTALL;
 125                  pkg->state_flag |= SF_OBSOLETE;
 126                  free(old_version);
 127                  free(new_version);
 128                  return 0;
 129           } else {
 130                free(old_version);
 131                free(new_version);
 132           }
 133      }
 134
 135      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 136      return opkg_install_pkg(conf, pkg,0);
 137 }
 138
 139 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 140 {
 141      int cmp, err = 0;
 142      pkg_t *old, *new;
 143      char *old_version, *new_version;
 144
 145      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 146      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 147      if ( old )
 148         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 149
 150      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 151      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 152      if ( new )
 153         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 154
 155 /* Pigi Basically here is broken the version stuff.
 156    What's happening is that nothing provide the version to differents
 157    functions, so the returned struct is always the latest.
 158    That's why the install by name don't work.
 159 */
 160      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 161
 162      if ( old )
 163         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 164      if ( new )
 165         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 166      opkg_message(conf, OPKG_DEBUG2, " \n");
 167
 168      if (new == NULL) {
 169           if (err)
 170             return err;
 171           else
 172             return OPKG_PKG_HAS_NO_CANDIDATE;
 173      }
 174
 175      new->state_flag |= SF_USER;
 176      if (old) {
 177           old_version = pkg_version_str_alloc(old);
 178           new_version = pkg_version_str_alloc(new);
 179
 180           cmp = pkg_compare_versions(old, new);
 181           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 182              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 183              cmp = -1 ;                                       /* then we force opkg to downgrade */
 184                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 185                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 186           }
 187           opkg_message(conf, OPKG_DEBUG,
 188                        "Comparing visible versions of pkg %s:"
 189                        "\n\t%s is installed "
 190                        "\n\t%s is available "
 191                        "\n\t%d was comparison result\n",
 192                        pkg_name, old_version, new_version, cmp);
 193           if (cmp == 0 && !conf->force_reinstall) {
 194                opkg_message(conf, OPKG_NOTICE,
 195                             "Package %s (%s) installed in %s is up to date.\n",
 196                             old->name, old_version, old->dest->name);
 197                free(old_version);
 198                free(new_version);
 199                return 0;
 200           } else if (cmp > 0) {
 201                opkg_message(conf, OPKG_NOTICE,
 202                             "Not downgrading package %s on %s from %s to %s.\n",
 203                             old->name, old->dest->name, old_version, new_version);
 204                free(old_version);
 205                free(new_version);
 206                return 0;
 207           } else if (cmp < 0) {
 208                new->dest = old->dest;
 209                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 210           }
 211      }
 212
 213      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 214         supposed to be an opkg_error_t, but opkg_install_pkg could
 215         return any kind of integer, (might be errno from a syscall,
 216         etc.). This is a real mess and will need to be cleaned up if
 217         anyone ever wants to make a nice libopkg. */
 218
 219      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 220      return opkg_install_pkg(conf, new,0);
 221 }
 222
 223 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 224 {
 225      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 226      int i;
 227      opkg_error_t err;
 228      abstract_pkg_t *ppkg ;
 229
 230      if (providers == NULL)
 231           return OPKG_PKG_HAS_NO_CANDIDATE;
 232
 233      for (i = 0; i < providers->len; i++) {
 234           ppkg = abstract_pkg_vec_get(providers, i);
 235           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 236           err = opkg_install_by_name(conf, ppkg->name);
 237           if (err)
 238                return err;
 239 /* XXX Maybe ppkg should be freed ? */
 240      }
 241      return 0;
 242 }
 243
 244 /*
 245  * Walk dependence graph starting with pkg, collect packages to be
 246  * installed into pkgs_needed, in dependence order.
 247  */
 248 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 249 {
 250      int i, err;
 251      pkg_vec_t *depends = pkg_vec_alloc();
 252      char **unresolved = NULL;
 253      int ndepends;
 254
 255      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 256                                                         pkg, depends,
 257                                                         &unresolved);
 258
 259      if (unresolved) {
 260           opkg_message(conf, OPKG_ERROR,
 261                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 262                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 263           while (*unresolved) {
 264                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 265                unresolved++;
 266           }
 267           opkg_message(conf, OPKG_ERROR, "\n");
 268           if (! conf->force_depends) {
 269                opkg_message(conf, OPKG_INFO,
 270                             "This could mean that your package list is out of date or that the packages\n"
 271                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 272                             "of this problem try again with the '-force-depends' option.\n");
 273                pkg_vec_free(depends);
 274                return OPKG_PKG_DEPS_UNSATISFIED;
 275           }
 276      }
 277
 278      if (ndepends <= 0) {
 279           pkg_vec_free(depends);
 280           return 0;
 281      }
 282
 283      for (i = 0; i < depends->len; i++) {
 284           pkg_t *dep = depends->pkgs[i];
 285           /* The package was uninstalled when we started, but another
 286              dep earlier in this loop may have depended on it and pulled
 287              it in, so check first. */
 288           if ((dep->state_status != SS_INSTALLED)
 289               && (dep->state_status != SS_UNPACKED)
 290               && (dep->state_want != SW_INSTALL)) {
 291
 292                /* Mark packages as to-be-installed */
 293                dep->state_want = SW_INSTALL;
 294
 295                /* Dependencies should be installed the same place as pkg */
 296                if (dep->dest == NULL) {
 297                     dep->dest = pkg->dest;
 298                }
 299
 300                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 301                if (err) {
 302                     pkg_vec_free(depends);
 303                     return err;
 304                }
 305           }
 306      }
 307      if (pkgs_needed)
 308           pkg_vec_insert(pkgs_needed, pkg);
 309
 310      pkg_vec_free(depends);
 311
 312      return 0;
 313 }
 314
 315 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 316 {
 317      int i, err;
 318      pkg_vec_t *depends = pkg_vec_alloc();
 319      pkg_t *dep;
 320      char **unresolved = NULL;
 321      int ndepends;
 322
 323      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 324                                                         pkg, depends,
 325                                                         &unresolved);
 326
 327      if (unresolved) {
 328           opkg_message(conf, OPKG_ERROR,
 329                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 330                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 331           while (*unresolved) {
 332                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 333                unresolved++;
 334           }
 335           opkg_message(conf, OPKG_ERROR, "\n");
 336           if (! conf->force_depends) {
 337                opkg_message(conf, OPKG_INFO,
 338                             "This could mean that your package list is out of date or that the packages\n"
 339                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 340                             "of this problem try again with the '-force-depends' option.\n");
 341                pkg_vec_free(depends);
 342                return OPKG_PKG_DEPS_UNSATISFIED;
 343           }
 344      }
 345
 346      if (ndepends <= 0) {
 347           pkg_vec_free(depends);
 348           return 0;
 349      }
 350
 351      /* Mark packages as to-be-installed */
 352      for (i=0; i < depends->len; i++) {
 353           /* Dependencies should be installed the same place as pkg */
 354           if (depends->pkgs[i]->dest == NULL) {
 355                depends->pkgs[i]->dest = pkg->dest;
 356           }
 357           depends->pkgs[i]->state_want = SW_INSTALL;
 358      }
 359
 360      for (i = 0; i < depends->len; i++) {
 361           dep = depends->pkgs[i];
 362           /* The package was uninstalled when we started, but another
 363              dep earlier in this loop may have depended on it and pulled
 364              it in, so check first. */
 365           if ((dep->state_status != SS_INSTALLED)
 366               && (dep->state_status != SS_UNPACKED)) {
 367                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 368                err = opkg_install_pkg(conf, dep,0);
 369                /* mark this package as having been automatically installed to
 370                 * satisfy a dependancy */
 371                dep->auto_installed = 1;
 372                if (err) {
 373                     pkg_vec_free(depends);
 374                     return err;
 375                }
 376           }
 377      }
 378
 379      pkg_vec_free(depends);
 380
 381      return 0;
 382 }
 383
 384
 385 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 386 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 387 {
 388      if (conf->nodeps == 0) {
 389           int i;
 390           pkg_vec_t *installed = pkg_vec_alloc();
 391           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 392           for (i = 0; i < installed->len; i++) {
 393                pkg_t *pkg = installed->pkgs[i];
 394                satisfy_dependencies_for(conf, pkg);
 395           }
 396           pkg_vec_free(installed);
 397      }
 398      return 0;
 399 }
 400
 401
 402 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 403 {
 404      int i;
 405      pkg_vec_t *conflicts = NULL;
 406      int level;
 407      const char *prefix;
 408      if (conf->force_depends) {
 409           level = OPKG_NOTICE;
 410           prefix = "Warning";
 411      } else {
 412           level = OPKG_ERROR;
 413           prefix = "ERROR";
 414      }
 415
 416      if (!conf->force_depends)
 417           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 418
 419      if (conflicts) {
 420           opkg_message(conf, level,
 421                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 422           i = 0;
 423           while (i < conflicts->len)
 424                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 425           opkg_message(conf, level, "\n");
 426           pkg_vec_free(conflicts);
 427           return OPKG_PKG_DEPS_UNSATISFIED;
 428      }
 429      return 0;
 430 }
 431
 432 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 433 {
 434      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 435      str_list_elt_t *iter, *niter;
 436
 437      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 438              iter;
 439              iter = niter, niter = str_list_next(new_list, niter)) {
 440           char *new_file = (char *)iter->data;
 441           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 442           if (!new_file)
 443                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 444           if (!owner || (owner == old_pkg))
 445                file_hash_set_file_owner(conf, new_file, new_pkg);
 446      }
 447      if (old_pkg) {
 448           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 449           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 450                   iter;
 451                   iter = niter, niter = str_list_next(old_list, niter)) {
 452                char *old_file = (char *)iter->data;
 453                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 454                if (owner == old_pkg) {
 455                     /* obsolete */
 456                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 457                }
 458           }
 459           pkg_free_installed_files(old_pkg);
 460      }
 461      pkg_free_installed_files(new_pkg);
 462      return 0;
 463 }
 464
 465 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 466 {
 467     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 468
 469     /* sma 6.20.02:  yup; here's the first bit */
 470     /*
 471      * XXX: BUG easy for cworth
 472      * 1) please point the call below to the correct current root destination
 473      * 2) we need to resolve how to check the required space for a pending pkg,
 474      *    my diddling with the .opk file size below isn't going to cut it.
 475      * 3) return a proper error code instead of 1
 476      */
 477      int comp_size, blocks_available;
 478      char *root_dir;
 479
 480      if (!conf->force_space && pkg->installed_size != NULL) {
 481           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 482           blocks_available = get_available_blocks(root_dir);
 483
 484           comp_size = strtoul(pkg->installed_size, NULL, 0);
 485           /* round up a blocks count without doing fancy-but-slow casting jazz */
 486           comp_size = (int)((comp_size + 1023) / 1024);
 487
 488           if (comp_size >= blocks_available) {
 489                opkg_message(conf, OPKG_ERROR,
 490                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 491                             blocks_available, root_dir, pkg->name, comp_size);
 492                return ENOSPC;
 493           }
 494      }
 495      return 0;
 496 }
 497
 498 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 499 {
 500      int err;
 501      char *conffiles_file_name;
 502      char *root_dir;
 503      FILE *conffiles_file;
 504
 505      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 506
 507      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 508      if (pkg->tmp_unpack_dir == NULL) {
 509           opkg_message(conf, OPKG_ERROR,
 510                        "%s: Failed to create temporary directory '%s': %s\n",
 511                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 512           return errno;
 513      }
 514
 515      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 516      if (err) {
 517           return err;
 518      }
 519
 520      /* XXX: CLEANUP: There might be a cleaner place to read in the
 521         conffiles. Seems like I should be able to get everything to go
 522         through pkg_init_from_file. If so, maybe it would make sense to
 523         move all of unpack_pkg_control_files to that function. */
 524
 525      /* Don't need to re-read conffiles if we already have it */
 526      if (!nv_pair_list_empty(&pkg->conffiles)) {
 527           return 0;
 528      }
 529
 530      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 531      if (! file_exists(conffiles_file_name)) {
 532           free(conffiles_file_name);
 533           return 0;
 534      }
 535
 536      conffiles_file = fopen(conffiles_file_name, "r");
 537      if (conffiles_file == NULL) {
 538           fprintf(stderr, "%s: failed to open %s: %s\n",
 539                   __FUNCTION__, conffiles_file_name, strerror(errno));
 540           free(conffiles_file_name);
 541           return errno;
 542      }
 543      free(conffiles_file_name);
 544
 545      while (1) {
 546           char *cf_name;
 547           char *cf_name_in_dest;
 548
 549           cf_name = file_read_line_alloc(conffiles_file);
 550           if (cf_name == NULL) {
 551                break;
 552           }
 553           str_chomp(cf_name);
 554           if (cf_name[0] == '\0') {
 555                continue;
 556           }
 557
 558           /* Prepend dest->root_dir to conffile name.
 559              Take pains to avoid multiple slashes. */
 560           root_dir = pkg->dest->root_dir;
 561           if (conf->offline_root)
 562                /* skip the offline_root prefix */
 563                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 564           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 565                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 566
 567           /* Can't get an md5sum now, (file isn't extracted yet).
 568              We'll wait until resolve_conffiles */
 569           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 570
 571           free(cf_name);
 572           free(cf_name_in_dest);
 573      }
 574
 575      fclose(conffiles_file);
 576
 577      return 0;
 578 }
 579
 580 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 581 {
 582     int i, j, found;
 583     char *buf, *d_str;
 584     pkg_t *p;
 585     if (!old_pkg)
 586         return 0;
 587     if (!pkg) {
 588         fprintf(stderr, "pkg shall not be NULL here.  please send to the bugzilla!! [%s %d]\n", __FILE__, __LINE__);
 589         return -1;
 590     }
 591     if (old_pkg->depends_count == 0)
 592         return 0;
 593     for (i=0;i<old_pkg->depends_count;i++) {
 594         found = 0;
 595         for (j=0;j<pkg->depends_count;j++) {
 596             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 597                 found = 1;
 598                 break;
 599             }
 600         }
 601         if (found)
 602             continue;
 603         d_str = old_pkg->depends_str[i];
 604         buf = calloc (1, strlen (d_str) + 1);
 605         j=0;
 606         while (d_str[j] != '\0' && d_str[j] != ' ') {
 607             buf[j]=d_str[j];
 608             ++j;
 609         }
 610         buf[j]='\0';
 611         buf = realloc (buf, strlen (buf) + 1);
 612         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 613         if (!p) {
 614             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 615             free(buf);
 616             continue;
 617         }
 618         if (p->auto_installed) {
 619             int deps;
 620             abstract_pkg_t **dependents;
 621             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 622             if (deps == 0) {
 623                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 624                 opkg_remove_pkg(conf, p, 0);
 625             } else
 626                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 627         }
 628         free(buf);
 629     }
 630     return 0;
 631 }
 632
 633 /* returns number of installed replacees */
 634 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 635 {
 636      abstract_pkg_t **replaces = pkg->replaces;
 637      int replaces_count = pkg->replaces_count;
 638      int i, j;
 639      for (i = 0; i < replaces_count; i++) {
 640           abstract_pkg_t *ab_pkg = replaces[i];
 641           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 642           if (pkg_vec) {
 643                for (j = 0; j < pkg_vec->len; j++) {
 644                     pkg_t *replacee = pkg_vec->pkgs[j];
 645                     if (!pkg_conflicts(pkg, replacee))
 646                          continue;
 647                     if (replacee->state_status == SS_INSTALLED) {
 648                          pkg_vec_insert(installed_replacees, replacee);
 649                     }
 650                }
 651           }
 652      }
 653      return installed_replacees->len;
 654 }
 655
 656 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 657 {
 658      int i;
 659      int replaces_count = replacees->len;
 660      for (i = 0; i < replaces_count; i++) {
 661           pkg_t *replacee = replacees->pkgs[i];
 662           int err;
 663           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 664           err = opkg_remove_pkg(conf, replacee,0);
 665           if (err)
 666                return err;
 667      }
 668      return 0;
 669 }
 670
 671 /* to unwind the removal: make sure they are installed */
 672 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 673 {
 674      int i, err;
 675      int replaces_count = replacees->len;
 676      for (i = 0; i < replaces_count; i++) {
 677           pkg_t *replacee = replacees->pkgs[i];
 678           if (replacee->state_status != SS_INSTALLED) {
 679                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 680                err = opkg_install_pkg(conf, replacee,0);
 681                if (err)
 682                     return err;
 683           }
 684      }
 685      return 0;
 686 }
 687
 688 int caught_sigint = 0;
 689 static void opkg_install_pkg_sigint_handler(int sig)
 690 {
 691      caught_sigint = sig;
 692 }
 693
 694 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 695 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 696 {
 697      if (old_pkg) {
 698           char message_out[15];
 699           char *old_version = pkg_version_str_alloc(old_pkg);
 700           char *new_version = pkg_version_str_alloc(pkg);
 701           int cmp = pkg_compare_versions(old_pkg, pkg);
 702           int rc = 0;
 703
 704           memset(message_out,'\x0',15);
 705           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 706           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 707              cmp = -1 ;                                       /* then we force opkg to downgrade */
 708              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 709                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 710           }
 711
 712           if (cmp > 0) {
 713                opkg_message(conf, OPKG_NOTICE,
 714                             "Not downgrading package %s on %s from %s to %s.\n",
 715                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 716                rc = 1;
 717           } else if (cmp < 0) {
 718                opkg_message(conf, OPKG_NOTICE,
 719                             "%s%s on %s from %s to %s...\n",
 720                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 721                pkg->dest = old_pkg->dest;
 722                rc = 0;
 723           } else /* cmp == 0 */ {
 724                if (conf->force_reinstall) {
 725                     opkg_message(conf, OPKG_NOTICE,
 726                                  "Reinstalling %s (%s) on %s...\n",
 727                                  pkg->name, new_version, old_pkg->dest->name);
 728                     pkg->dest = old_pkg->dest;
 729                     rc = 0;
 730                } else {
 731                     opkg_message(conf, OPKG_NOTICE,
 732                                  "Not installing %s (%s) on %s -- already installed.\n",
 733                                  pkg->name, new_version, old_pkg->dest->name);
 734                     rc = 1;
 735                }
 736           }
 737           free(old_version);
 738           free(new_version);
 739           return rc;
 740      } else {
 741       char message_out[15] ;
 742       memset(message_out,'\x0',15);
 743       if ( message )
 744           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 745       else
 746           strncpy( message_out,"Installing ",strlen("Installing ") );
 747           char *version = pkg_version_str_alloc(pkg);
 748
 749           opkg_message(conf, OPKG_NOTICE,
 750                        "%s%s (%s) to %s...\n", message_out,
 751                        pkg->name, version, pkg->dest->name);
 752           free(version);
 753           return 0;
 754      }
 755 }
 756
 757 /**
 758  *  @brief Really install a pkg_t
 759  */
 760 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 761 {
 762      int err = 0;
 763      int message = 0;
 764      pkg_t *old_pkg = NULL;
 765      pkg_vec_t *replacees;
 766      abstract_pkg_t *ab_pkg = NULL;
 767      int old_state_flag;
 768      char* file_md5;
 769 #ifdef HAVE_SHA256
 770      char* file_sha256;
 771 #endif
 772      char *pkgid;
 773
 774      if ( from_upgrade )
 775         message = 1;            /* Coming from an upgrade, and should change the output message */
 776
 777      if (!pkg) {
 778           opkg_message(conf, OPKG_ERROR,
 779                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 780           return OPKG_INSTALL_ERR_INTERNAL;
 781      }
 782
 783      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 784
 785      if (!pkg_arch_supported(conf, pkg)) {
 786           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 787                        pkg->architecture, pkg->name);
 788           return OPKG_INSTALL_ERR_INTERNAL;
 789      }
 790      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 791           err = satisfy_dependencies_for(conf, pkg);
 792           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 793
 794           opkg_message(conf, OPKG_NOTICE,
 795                        "Package %s is already installed in %s.\n",
 796                        pkg->name, pkg->dest->name);
 797           return 0;
 798      }
 799
 800      if (pkg->dest == NULL) {
 801           pkg->dest = conf->default_dest;
 802      }
 803
 804      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 805
 806      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 807      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 808
 809      pkg->state_want = SW_INSTALL;
 810      if (old_pkg){
 811          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 812      }
 813
 814
 815      /* Abhaya: conflicts check */
 816      err = check_conflicts_for(conf, pkg);
 817      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 818
 819      /* this setup is to remove the upgrade scenario in the end when
 820         installing pkg A, A deps B & B deps on A. So both B and A are
 821         installed. Then A's installation is started resulting in an
 822         uncecessary upgrade */
 823      if (pkg->state_status == SS_INSTALLED
 824          && conf->force_reinstall == 0) return 0;
 825
 826      err = verify_pkg_installable(conf, pkg);
 827      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 828
 829      if (pkg->local_filename == NULL) {
 830           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 831           if (err) {
 832                opkg_message(conf, OPKG_ERROR,
 833                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 834                             pkg->name);
 835                return OPKG_INSTALL_ERR_DOWNLOAD;
 836           }
 837      }
 838
 839      /* check that the repository is valid */
 840      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 841      char *list_file_name, *sig_file_name, *lists_dir;
 842
 843      /* check to ensure the package has come from a repository */
 844      if (conf->check_signature && pkg->src)
 845      {
 846        sprintf_alloc (&lists_dir, "%s",
 847                      (conf->restrict_to_default_dest)
 848                       ? conf->default_dest->lists_dir
 849                       : conf->lists_dir);
 850        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 851        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 852
 853        if (file_exists (sig_file_name))
 854        {
 855          if (opkg_verify_file (conf, list_file_name, sig_file_name))
 856            return OPKG_INSTALL_ERR_SIGNATURE;
 857        }else{
 858          return OPKG_INSTALL_ERR_SIGNATURE;
 859        }
 860
 861        free (lists_dir);
 862        free (list_file_name);
 863        free (sig_file_name);
 864      }
 865      #endif
 866
 867      /* Check for md5 values */
 868      if (pkg->md5sum)
 869      {
 870          file_md5 = file_md5sum_alloc(pkg->local_filename);
 871          if (strcmp(file_md5, pkg->md5sum))
 872          {
 873               opkg_message(conf, OPKG_ERROR,
 874                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 875                            pkg->name);
 876               free(file_md5);
 877               return OPKG_INSTALL_ERR_MD5;
 878          }
 879          free(file_md5);
 880      }
 881
 882 #ifdef HAVE_SHA256
 883      /* Check for sha256 value */
 884      if(pkg->sha256sum)
 885      {
 886          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 887          if (strcmp(file_sha256, pkg->sha256sum))
 888          {
 889               opkg_message(conf, OPKG_ERROR,
 890                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 891                            pkg->name);
 892               free(file_sha256);
 893               return OPKG_INSTALL_ERR_SHA256;
 894          }
 895      }
 896 #endif
 897
 898      if (pkg->tmp_unpack_dir == NULL) {
 899           unpack_pkg_control_files(conf, pkg);
 900      }
 901
 902      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 903 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 904 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 905      err = update_file_ownership(conf, pkg, old_pkg);
 906      if (err) { return OPKG_ERR_UNKNOWN; }
 907
 908      if (conf->nodeps == 0) {
 909           err = satisfy_dependencies_for(conf, pkg);
 910           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 911      }
 912
 913      replacees = pkg_vec_alloc();
 914      pkg_get_installed_replacees(conf, pkg, replacees);
 915
 916      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 917      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 918      free (pkgid);
 919
 920      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 921      {
 922           sigset_t newset, oldset;
 923           sighandler_t old_handler = NULL;
 924           int use_signal = 0;
 925           caught_sigint = 0;
 926           if (use_signal) {
 927                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 928           } else {
 929                sigemptyset(&newset);
 930                sigaddset(&newset, SIGINT);
 931                sigprocmask(SIG_BLOCK, &newset, &oldset);
 932           }
 933
 934           opkg_state_changed++;
 935           pkg->state_flag |= SF_FILELIST_CHANGED;
 936
 937           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 938
 939           /* XXX: BUG: we really should treat replacement more like an upgrade
 940            *      Instead, we're going to remove the replacees
 941            */
 942           err = pkg_remove_installed_replacees(conf, replacees);
 943           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 944
 945           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 946           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 947
 948           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 949           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 950
 951           err = preinst_configure(conf, pkg, old_pkg);
 952           if (err) goto UNWIND_PREINST_CONFIGURE;
 953
 954           err = backup_modified_conffiles(conf, pkg, old_pkg);
 955           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 956
 957           err = check_data_file_clashes(conf, pkg, old_pkg);
 958           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 959
 960           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 961           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 962
 963           if (conf->noaction) return 0;
 964
 965           /* point of no return: no unwinding after this */
 966           if (old_pkg && !conf->force_reinstall) {
 967                old_pkg->state_want = SW_DEINSTALL;
 968
 969                if (old_pkg->state_flag & SF_NOPRUNE) {
 970                     opkg_message(conf, OPKG_INFO,
 971                                  "  not removing obsolesced files because package marked noprune\n");
 972                } else {
 973                     opkg_message(conf, OPKG_INFO,
 974                                  "  removing obsolesced files\n");
 975                     remove_obsolesced_files(conf, pkg, old_pkg);
 976                }
 977                /* removing files from old package, to avoid ghost files */
 978                remove_data_files_and_list(conf, old_pkg);
 979 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 980                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 981                remove_postrm(conf, old_pkg);
 982 /* Pigi */
 983
 984           }
 985
 986
 987           opkg_message(conf, OPKG_INFO,
 988                        "  installing maintainer scripts\n");
 989           install_maintainer_scripts(conf, pkg, old_pkg);
 990
 991           /* the following just returns 0 */
 992           remove_disappeared(conf, pkg);
 993
 994           opkg_message(conf, OPKG_INFO,
 995                        "  installing data files\n");
 996           install_data_files(conf, pkg);
 997
 998 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 999           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1000
1001           opkg_message(conf, OPKG_INFO,
1002                        "  resolving conf files\n");
1003           resolve_conffiles(conf, pkg);
1004
1005           pkg->state_status = SS_UNPACKED;
1006           old_state_flag = pkg->state_flag;
1007           pkg->state_flag &= ~SF_PREFER;
1008           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1009
1010           if (old_pkg && !conf->force_reinstall) {
1011                old_pkg->state_status = SS_NOT_INSTALLED;
1012           }
1013
1014           time(&pkg->installed_time);
1015
1016           opkg_message(conf, OPKG_INFO,
1017                        "  cleanup temp files\n");
1018           cleanup_temporary_files(conf, pkg);
1019
1020           ab_pkg = pkg->parent;
1021           if (ab_pkg)
1022                ab_pkg->state_status = pkg->state_status;
1023
1024           opkg_message(conf, OPKG_INFO, "Done.\n");
1025
1026           if (use_signal)
1027                signal(SIGINT, old_handler);
1028           else
1029                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1030           pkg_vec_free (replacees);
1031           return 0;
1032
1033
1034      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1035           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1036      UNWIND_CHECK_DATA_FILE_CLASHES:
1037           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1038      UNWIND_BACKUP_MODIFIED_CONFFILES:
1039           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1040      UNWIND_PREINST_CONFIGURE:
1041           preinst_configure_unwind(conf, pkg, old_pkg);
1042      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1043           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1044      UNWIND_PRERM_UPGRADE_OLD_PKG:
1045           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1046      UNWIND_REMOVE_INSTALLED_REPLACEES:
1047           pkg_remove_installed_replacees_unwind(conf, replacees);
1048
1049           opkg_message(conf, OPKG_INFO,
1050                        "  cleanup temp files\n");
1051           cleanup_temporary_files(conf, pkg);
1052
1053           opkg_message(conf, OPKG_INFO,
1054                        "Failed.\n");
1055           if (use_signal)
1056                signal(SIGINT, old_handler);
1057           else
1058                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1059
1060           pkg_vec_free (replacees);
1061           return OPKG_ERR_UNKNOWN;
1062      }
1063      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1064 }
1065
1066 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1067 {
1068      /* DPKG_INCOMPATIBILITY:
1069         dpkg does some things here that we don't do yet. Do we care?
1070
1071         1. If a version of the package is already installed, call
1072            old-prerm upgrade new-version
1073         2. If the script runs but exits with a non-zero exit status
1074            new-prerm failed-upgrade old-version
1075            Error unwind, for both the above cases:
1076            old-postinst abort-upgrade new-version
1077      */
1078      return 0;
1079 }
1080
1081 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1082 {
1083      /* DPKG_INCOMPATIBILITY:
1084         dpkg does some things here that we don't do yet. Do we care?
1085         (See prerm_upgrade_old_package for details)
1086      */
1087      return 0;
1088 }
1089
1090 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1091 {
1092      /* DPKG_INCOMPATIBILITY:
1093         dpkg does some things here that we don't do yet. Do we care?
1094         2. If a 'conflicting' package is being removed at the same time:
1095                 1. If any packages depended on that conflicting package and
1096                    --auto-deconfigure is specified, call, for each such package:
1097                    deconfigured's-prerm deconfigure \
1098                    in-favour package-being-installed version \
1099                    removing conflicting-package version
1100                 Error unwind:
1101                    deconfigured's-postinst abort-deconfigure \
1102                    in-favour package-being-installed-but-failed version \
1103                    removing conflicting-package version
1104
1105                    The deconfigured packages are marked as requiring
1106                    configuration, so that if --install is used they will be
1107                    configured again if possible.
1108                 2. To prepare for removal of the conflicting package, call:
1109                    conflictor's-prerm remove in-favour package new-version
1110                 Error unwind:
1111                    conflictor's-postinst abort-remove in-favour package new-version
1112      */
1113      return 0;
1114 }
1115
1116 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1117 {
1118      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1119         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1120         details) */
1121      return 0;
1122 }
1123
1124 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1125 {
1126      int err;
1127      char *preinst_args;
1128
1129      if (old_pkg) {
1130           char *old_version = pkg_version_str_alloc(old_pkg);
1131           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1132           free(old_version);
1133      } else if (pkg->state_status == SS_CONFIG_FILES) {
1134           char *pkg_version = pkg_version_str_alloc(pkg);
1135           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1136           free(pkg_version);
1137      } else {
1138           preinst_args = strdup("install");
1139      }
1140
1141      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1142      if (err) {
1143           opkg_message(conf, OPKG_ERROR,
1144                        "Aborting installation of %s\n", pkg->name);
1145           return 1;
1146      }
1147
1148      free(preinst_args);
1149
1150      return 0;
1151 }
1152
1153 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1154 {
1155      /* DPKG_INCOMPATIBILITY:
1156         dpkg does the following error unwind, should we?
1157         pkg->postrm abort-upgrade old-version
1158         OR pkg->postrm abort-install old-version
1159         OR pkg->postrm abort-install
1160      */
1161      return 0;
1162 }
1163
1164 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1165 {
1166      int err;
1167      conffile_list_elt_t *iter;
1168      conffile_t *cf;
1169
1170      if (conf->noaction) return 0;
1171
1172      /* Backup all modified conffiles */
1173      if (old_pkg) {
1174           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1175                char *cf_name;
1176
1177                cf = iter->data;
1178                cf_name = root_filename_alloc(conf, cf->name);
1179
1180                /* Don't worry if the conffile is just plain gone */
1181                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1182                     err = backup_make_backup(conf, cf_name);
1183                     if (err) {
1184                          return err;
1185                     }
1186                }
1187                free(cf_name);
1188           }
1189      }
1190
1191      /* Backup all conffiles that were not conffiles in old_pkg */
1192      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1193           char *cf_name;
1194           cf = (conffile_t *)iter->data;
1195           cf_name = root_filename_alloc(conf, cf->name);
1196           /* Ignore if this was a conffile in old_pkg as well */
1197           if (pkg_get_conffile(old_pkg, cf->name)) {
1198                continue;
1199           }
1200
1201           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1202                err = backup_make_backup(conf, cf_name);
1203                if (err) {
1204                     return err;
1205                }
1206           }
1207           free(cf_name);
1208      }
1209
1210      return 0;
1211 }
1212
1213 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1214 {
1215      conffile_list_elt_t *iter;
1216
1217      if (old_pkg) {
1218           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1219                backup_remove(((nv_pair_t *)iter->data)->name);
1220           }
1221      }
1222
1223      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1224           backup_remove(((nv_pair_t *)iter->data)->name);
1225      }
1226
1227      return 0;
1228 }
1229
1230
1231 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1232 {
1233      /* DPKG_INCOMPATIBILITY:
1234         opkg takes a slightly different approach than dpkg at this
1235         point.  dpkg installs each file in the new package while
1236         creating a backup for any file that is replaced, (so that it
1237         can unwind if necessary).  To avoid complexity and redundant
1238         storage, opkg doesn't do any installation until later, (at the
1239         point at which dpkg removes the backups.
1240
1241         But, we do have to check for data file clashes, since after
1242         installing a package with a file clash, removing either of the
1243         packages involved in the clash has the potential to break the
1244         other package.
1245      */
1246      str_list_t *files_list;
1247      str_list_elt_t *iter, *niter;
1248
1249      int clashes = 0;
1250
1251      files_list = pkg_get_installed_files(pkg);
1252      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1253              iter;
1254              iter = niter, niter = str_list_next(files_list, iter)) {
1255           char *root_filename;
1256           char *filename = (char *) iter->data;
1257           root_filename = root_filename_alloc(conf, filename);
1258           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1259                pkg_t *owner;
1260                pkg_t *obs;
1261                /* Pre-existing conffiles are OK */
1262                /* @@@@ should have way to check that it is a conffile -Jamey */
1263                if (backup_exists_for(root_filename)) {
1264                     continue;
1265                }
1266
1267                /* Pre-existing files are OK if force-overwrite was asserted. */
1268                if (conf->force_overwrite) {
1269                     /* but we need to change who owns this file */
1270                     file_hash_set_file_owner(conf, filename, pkg);
1271                     continue;
1272                }
1273
1274                owner = file_hash_get_file_owner(conf, filename);
1275
1276                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1277                if (owner && old_pkg) {
1278                     if (strcmp(owner->name, old_pkg->name) == 0) {
1279                          continue;
1280                     }
1281                }
1282
1283                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1284                if (owner) {
1285                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1286                     if (pkg_replaces(pkg, owner)) {
1287                          continue;
1288                     }
1289 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1290    then it's ok to overwrite. */
1291                     if (strcmp(owner->name,pkg->name)==0){
1292                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1293                          continue;
1294                     }
1295                }
1296
1297                /* Pre-existing files are OK if they are obsolete */
1298                obs = hash_table_get(&conf->obs_file_hash, filename);
1299                if (obs) {
1300                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1301                     continue;
1302                }
1303
1304                /* We have found a clash. */
1305                opkg_message(conf, OPKG_ERROR,
1306                             "Package %s wants to install file %s\n"
1307                             "\tBut that file is already provided by package ",
1308                             pkg->name, filename);
1309                if (owner) {
1310                     opkg_message(conf, OPKG_ERROR,
1311                                  "%s\n", owner->name);
1312                } else {
1313                     opkg_message(conf, OPKG_ERROR,
1314                                  "<no package>\nPlease move this file out of the way and try again.\n");
1315                }
1316                clashes++;
1317           }
1318           free(root_filename);
1319      }
1320      pkg_free_installed_files(pkg);
1321
1322      return clashes;
1323 }
1324
1325 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1326 {
1327     /* Basically that's the worst hack I could do to be able to change ownership of
1328        file list, but, being that we have no way to unwind the mods, due to structure
1329        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1330        What we do here is change the ownership of file in hash if a replace ( or similar events
1331        happens )
1332        Only the action that are needed to change name should be considered.
1333        @@@ To change after 1.0 release.
1334      */
1335      str_list_t *files_list;
1336      str_list_elt_t *iter, *niter;
1337
1338      char *root_filename = NULL;
1339
1340      int clashes = 0;
1341
1342      files_list = pkg_get_installed_files(pkg);
1343      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1344              iter;
1345              iter = niter, niter = str_list_next(files_list, niter)) {
1346           char *filename = (char *) iter->data;
1347           if (root_filename) {
1348               free(root_filename);
1349               root_filename = NULL;
1350           }
1351           root_filename = root_filename_alloc(conf, filename);
1352           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1353                pkg_t *owner;
1354
1355                owner = file_hash_get_file_owner(conf, filename);
1356
1357                if (conf->force_overwrite) {
1358                     /* but we need to change who owns this file */
1359                     file_hash_set_file_owner(conf, filename, pkg);
1360                     continue;
1361                }
1362
1363
1364                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1365                if (owner) {
1366                     if (pkg_replaces(pkg, owner)) {
1367 /* It's now time to change the owner of that file.
1368    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1369                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1370                          file_hash_set_file_owner(conf, filename, pkg);
1371                          continue;
1372                     }
1373                }
1374
1375           }
1376      }
1377      if (root_filename) {
1378          free(root_filename);
1379          root_filename = NULL;
1380      }
1381      pkg_free_installed_files(pkg);
1382
1383      return clashes;
1384 }
1385
1386 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1387 {
1388      /* Nothing to do since check_data_file_clashes doesn't change state */
1389      return 0;
1390 }
1391
1392 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1393 {
1394      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1395         1. If the package is being upgraded, call
1396            old-postrm upgrade new-version
1397         2. If this fails, attempt:
1398            new-postrm failed-upgrade old-version
1399         Error unwind, for both cases:
1400            old-preinst abort-upgrade new-version    */
1401      return 0;
1402 }
1403
1404 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1405 {
1406      /* DPKG_INCOMPATIBILITY:
1407         dpkg does some things here that we don't do yet. Do we care?
1408         (See postrm_upgrade_old_pkg for details)
1409      */
1410     return 0;
1411 }
1412
1413 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1414 {
1415      int err;
1416      str_list_t *old_files;
1417      str_list_elt_t *of;
1418      str_list_t *new_files;
1419      str_list_elt_t *nf;
1420      hash_table_t new_files_table;
1421
1422      if (old_pkg == NULL) {
1423           return 0;
1424      }
1425
1426      old_files = pkg_get_installed_files(old_pkg);
1427      new_files = pkg_get_installed_files(pkg);
1428
1429      new_files_table.entries = NULL;
1430      hash_table_init("new_files" , &new_files_table, 20);
1431      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1432          if (nf && nf->data)
1433             hash_table_insert(&new_files_table, nf->data, nf->data);
1434      }
1435
1436      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1437           pkg_t *owner;
1438           char *old, *new;
1439           old = (char *)of->data;
1440           new = (char *) hash_table_get (&new_files_table, old);
1441           if (new)
1442                continue;
1443
1444           if (file_is_dir(old)) {
1445                continue;
1446           }
1447           owner = file_hash_get_file_owner(conf, old);
1448           if (owner != old_pkg) {
1449                /* in case obsolete file no longer belongs to old_pkg */
1450                continue;
1451           }
1452
1453           /* old file is obsolete */
1454           opkg_message(conf, OPKG_INFO,
1455                        "    removing obsolete file %s\n", old);
1456           if (!conf->noaction) {
1457                err = unlink(old);
1458                if (err) {
1459                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1460                                  strerror(errno));
1461                }
1462           }
1463      }
1464
1465      hash_table_deinit(&new_files_table);
1466      pkg_free_installed_files(old_pkg);
1467      pkg_free_installed_files(pkg);
1468
1469      return 0;
1470 }
1471
1472 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1473 {
1474      int i;
1475      int err = 0;
1476      char *globpattern;
1477      glob_t globbuf;
1478      if (0) {
1479           if (!pkg->dest) {
1480                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1481                return -1;
1482           }
1483           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1484           err = glob(globpattern, 0, NULL, &globbuf);
1485           free(globpattern);
1486           if (err) {
1487                return err;
1488           }
1489           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1490           for (i = 0; i < globbuf.gl_pathc; i++) {
1491                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1492                             globbuf.gl_pathv[i], old_pkg->name);
1493                if (!conf->noaction)
1494                     unlink(globbuf.gl_pathv[i]);
1495           }
1496           globfree(&globbuf);
1497      }
1498      return err;
1499 }
1500
1501 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1502 {
1503      int ret;
1504      char *prefix;
1505
1506      if (old_pkg)
1507           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1508      sprintf_alloc(&prefix, "%s.", pkg->name);
1509      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1510                                                         pkg->dest->info_dir,
1511                                                         prefix);
1512      free(prefix);
1513      return ret;
1514 }
1515
1516 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1517 {
1518      /* DPKG_INCOMPATIBILITY:
1519         This is a fairly sophisticated dpkg operation. Shall we
1520         skip it? */
1521
1522      /* Any packages all of whose files have been overwritten during the
1523         installation, and which aren't required for dependencies, are
1524         considered to have been removed. For each such package
1525         1. disappearer's-postrm disappear overwriter overwriter-version
1526         2. The package's maintainer scripts are removed
1527         3. It is noted in the status database as being in a sane state,
1528            namely not installed (any conffiles it may have are ignored,
1529            rather than being removed by dpkg). Note that disappearing
1530            packages do not have their prerm called, because dpkg doesn't
1531            know in advance that the package is going to vanish.
1532      */
1533      return 0;
1534 }
1535
1536 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1537 {
1538      int err;
1539
1540      /* opkg takes a slightly different approach to data file backups
1541         than dpkg. Rather than removing backups at this point, we
1542         actually do the data file installation now. See comments in
1543         check_data_file_clashes() for more details. */
1544
1545      opkg_message(conf, OPKG_INFO,
1546                   "    extracting data files to %s\n", pkg->dest->root_dir);
1547      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1548      if (err) {
1549           return err;
1550      }
1551
1552      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1553         so we can't save ourself from removing important packages
1554         At this point we (should) have extracted the .control file, so it
1555         would be a good idea to reload the data in it, and set the Essential
1556         state in *pkg. From now on the Essential is back in status file and
1557         we can protect again.
1558         We should operate this way:
1559         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1560         check for "Essential" in it
1561         set the value in pkg->essential.
1562         This new routine could be useful also for every other flag
1563         Pigi: 16/03/2004 */
1564      set_flags_from_control(conf, pkg) ;
1565
1566      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1567      err = pkg_write_filelist(conf, pkg);
1568      if (err)
1569           return err;
1570
1571      /* XXX: FEATURE: opkg should identify any files which existed
1572         before installation and which were overwritten, (see
1573         check_data_file_clashes()). What it must do is remove any such
1574         files from the filelist of the old package which provided the
1575         file. Otherwise, if the old package were removed at some point
1576         it would break the new package. Removing the new package will
1577         also break the old one, but this cannot be helped since the old
1578         package's file has already been deleted. This is the importance
1579         of check_data_file_clashes(), and only allowing opkg to install
1580         a clashing package with a user force. */
1581
1582      return 0;
1583 }
1584
1585 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1586 {
1587      conffile_list_elt_t *iter;
1588      conffile_t *cf;
1589      char *cf_backup;
1590
1591     char *md5sum;
1592
1593
1594      if (conf->noaction) return 0;
1595
1596      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1597           char *root_filename;
1598           cf = (conffile_t *)iter->data;
1599           root_filename = root_filename_alloc(conf, cf->name);
1600
1601           /* Might need to initialize the md5sum for each conffile */
1602           if (cf->value == NULL) {
1603                cf->value = file_md5sum_alloc(root_filename);
1604           }
1605
1606           if (!file_exists(root_filename)) {
1607                free(root_filename);
1608                continue;
1609           }
1610
1611           cf_backup = backup_filename_alloc(root_filename);
1612
1613
1614           if (file_exists(cf_backup)) {
1615               /* Let's compute md5 to test if files are changed */
1616               md5sum = file_md5sum_alloc(cf_backup);
1617               if (strcmp( cf->value,md5sum) != 0 ) {
1618                   if (conf->force_maintainer) {
1619                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1620                   } else if (conf->force_defaults
1621                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1622                       rename(cf_backup, root_filename);
1623                   }
1624               }
1625               unlink(cf_backup);
1626               free(md5sum);
1627           }
1628
1629           free(cf_backup);
1630           free(root_filename);
1631      }
1632
1633      return 0;
1634 }
1635
1636 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1637 {
1638      char *response;
1639      const char *short_file_name;
1640
1641      short_file_name = strrchr(file_name, '/');
1642      if (short_file_name) {
1643           short_file_name++;
1644      } else {
1645           short_file_name = file_name;
1646      }
1647
1648      while (1) {
1649           response = get_user_response("    Configuration file '%s'\n"
1650                                        "    ==> File on system created by you or by a script.\n"
1651                                        "    ==> File also in package provided by package maintainer.\n"
1652                                        "       What would you like to do about it ?  Your options are:\n"
1653                                        "        Y or I  : install the package maintainer's version\n"
1654                                        "        N or O  : keep your currently-installed version\n"
1655                                        "          D     : show the differences between the versions (if diff is installed)\n"
1656                                        "     The default action is to keep your current version.\n"
1657                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1658           if (strcmp(response, "y") == 0
1659               || strcmp(response, "i") == 0
1660               || strcmp(response, "yes") == 0) {
1661                free(response);
1662                return 0;
1663           }
1664
1665           if (strcmp(response, "d") == 0) {
1666                char *cmd;
1667
1668                free(response);
1669                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1670                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1671                xsystem(cmd);
1672                free(cmd);
1673                printf("    [Press ENTER to continue]\n");
1674                response = file_read_line_alloc(stdin);
1675                free(response);
1676                continue;
1677           }
1678
1679           free(response);
1680           return 1;
1681      }
1682 }
1683
1684 /* XXX: CLEANUP: I'd like to move all of the code for
1685    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1686    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1687    pkg_deinit for example). */
1688 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1689 {
1690      DIR *tmp_dir;
1691      struct dirent *dirent;
1692      char *tmp_file;
1693
1694 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1695 #error
1696      opkg_message(conf, OPKG_DEBUG,
1697                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1698                   __FUNCTION__, pkg->tmp_unpack_dir);
1699      return 0;
1700 #endif
1701
1702      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1703           tmp_dir = opendir(pkg->tmp_unpack_dir);
1704           if (tmp_dir) {
1705                while (1) {
1706                     dirent = readdir(tmp_dir);
1707                     if (dirent == NULL) {
1708                          break;
1709                     }
1710                     sprintf_alloc(&tmp_file, "%s/%s",
1711                                   pkg->tmp_unpack_dir, dirent->d_name);
1712                     if (! file_is_dir(tmp_file)) {
1713                          unlink(tmp_file);
1714                     }
1715                     free(tmp_file);
1716                }
1717                closedir(tmp_dir);
1718                rmdir(pkg->tmp_unpack_dir);
1719                free(pkg->tmp_unpack_dir);
1720                pkg->tmp_unpack_dir = NULL;
1721           }
1722      }
1723
1724      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1725                   pkg->name, pkg->local_filename, conf->tmp_dir);
1726      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1727           unlink(pkg->local_filename);
1728           free(pkg->local_filename);
1729           pkg->local_filename = NULL;
1730      }
1731
1732      return 0;
1733 }
1734
1735 static char *backup_filename_alloc(const char *file_name)
1736 {
1737      char *backup;
1738
1739      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1740
1741      return backup;
1742 }
1743
1744 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1745 {
1746      int err;
1747      char *backup;
1748
1749      backup = backup_filename_alloc(file_name);
1750      err = file_copy(file_name, backup);
1751      if (err) {
1752           opkg_message(conf, OPKG_ERROR,
1753                        "%s: Failed to copy %s to %s\n",
1754                        __FUNCTION__, file_name, backup);
1755      }
1756
1757      free(backup);
1758
1759      return err;
1760 }
1761
1762 static int backup_exists_for(const char *file_name)
1763 {
1764      int ret;
1765      char *backup;
1766
1767      backup = backup_filename_alloc(file_name);
1768
1769      ret = file_exists(backup);
1770
1771      free(backup);
1772
1773      return ret;
1774 }
1775
1776 static int backup_remove(const char *file_name)
1777 {
1778      char *backup;
1779
1780      backup = backup_filename_alloc(file_name);
1781      unlink(backup);
1782      free(backup);
1783
1784      return 0;
1785 }
1786