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            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 857                            list_file_name);
 858            return OPKG_INSTALL_ERR_SIGNATURE;
 859          }
 860        }else{
 861          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 862                          "Perhaps you need to run 'opkg update'?\n");
 863          return OPKG_INSTALL_ERR_SIGNATURE;
 864        }
 865
 866        free (lists_dir);
 867        free (list_file_name);
 868        free (sig_file_name);
 869      }
 870      #endif
 871
 872      /* Check for md5 values */
 873      if (pkg->md5sum)
 874      {
 875          file_md5 = file_md5sum_alloc(pkg->local_filename);
 876          if (strcmp(file_md5, pkg->md5sum))
 877          {
 878               opkg_message(conf, OPKG_ERROR,
 879                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 880                            pkg->name);
 881               free(file_md5);
 882               return OPKG_INSTALL_ERR_MD5;
 883          }
 884          free(file_md5);
 885      }
 886
 887 #ifdef HAVE_SHA256
 888      /* Check for sha256 value */
 889      if(pkg->sha256sum)
 890      {
 891          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 892          if (strcmp(file_sha256, pkg->sha256sum))
 893          {
 894               opkg_message(conf, OPKG_ERROR,
 895                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 896                            pkg->name);
 897               free(file_sha256);
 898               return OPKG_INSTALL_ERR_SHA256;
 899          }
 900      }
 901 #endif
 902
 903      if (pkg->tmp_unpack_dir == NULL) {
 904           unpack_pkg_control_files(conf, pkg);
 905      }
 906
 907      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 908 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 909 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 910      err = update_file_ownership(conf, pkg, old_pkg);
 911      if (err) { return OPKG_ERR_UNKNOWN; }
 912
 913      if (conf->nodeps == 0) {
 914           err = satisfy_dependencies_for(conf, pkg);
 915           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 916      }
 917
 918      replacees = pkg_vec_alloc();
 919      pkg_get_installed_replacees(conf, pkg, replacees);
 920
 921      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 922      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 923      free (pkgid);
 924
 925      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 926      {
 927           sigset_t newset, oldset;
 928           sighandler_t old_handler = NULL;
 929           int use_signal = 0;
 930           caught_sigint = 0;
 931           if (use_signal) {
 932                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 933           } else {
 934                sigemptyset(&newset);
 935                sigaddset(&newset, SIGINT);
 936                sigprocmask(SIG_BLOCK, &newset, &oldset);
 937           }
 938
 939           opkg_state_changed++;
 940           pkg->state_flag |= SF_FILELIST_CHANGED;
 941
 942           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 943
 944           /* XXX: BUG: we really should treat replacement more like an upgrade
 945            *      Instead, we're going to remove the replacees
 946            */
 947           err = pkg_remove_installed_replacees(conf, replacees);
 948           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 949
 950           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 951           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 952
 953           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 954           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 955
 956           err = preinst_configure(conf, pkg, old_pkg);
 957           if (err) goto UNWIND_PREINST_CONFIGURE;
 958
 959           err = backup_modified_conffiles(conf, pkg, old_pkg);
 960           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 961
 962           err = check_data_file_clashes(conf, pkg, old_pkg);
 963           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 964
 965           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 966           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 967
 968           if (conf->noaction) return 0;
 969
 970           /* point of no return: no unwinding after this */
 971           if (old_pkg && !conf->force_reinstall) {
 972                old_pkg->state_want = SW_DEINSTALL;
 973
 974                if (old_pkg->state_flag & SF_NOPRUNE) {
 975                     opkg_message(conf, OPKG_INFO,
 976                                  "  not removing obsolesced files because package marked noprune\n");
 977                } else {
 978                     opkg_message(conf, OPKG_INFO,
 979                                  "  removing obsolesced files\n");
 980                     remove_obsolesced_files(conf, pkg, old_pkg);
 981                }
 982                /* removing files from old package, to avoid ghost files */
 983                remove_data_files_and_list(conf, old_pkg);
 984 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 985                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 986                remove_postrm(conf, old_pkg);
 987 /* Pigi */
 988
 989           }
 990
 991
 992           opkg_message(conf, OPKG_INFO,
 993                        "  installing maintainer scripts\n");
 994           install_maintainer_scripts(conf, pkg, old_pkg);
 995
 996           /* the following just returns 0 */
 997           remove_disappeared(conf, pkg);
 998
 999           opkg_message(conf, OPKG_INFO,
1000                        "  installing data files\n");
1001           install_data_files(conf, pkg);
1002
1003 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1004           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1005
1006           opkg_message(conf, OPKG_INFO,
1007                        "  resolving conf files\n");
1008           resolve_conffiles(conf, pkg);
1009
1010           pkg->state_status = SS_UNPACKED;
1011           old_state_flag = pkg->state_flag;
1012           pkg->state_flag &= ~SF_PREFER;
1013           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1014
1015           if (old_pkg && !conf->force_reinstall) {
1016                old_pkg->state_status = SS_NOT_INSTALLED;
1017           }
1018
1019           time(&pkg->installed_time);
1020
1021           opkg_message(conf, OPKG_INFO,
1022                        "  cleanup temp files\n");
1023           cleanup_temporary_files(conf, pkg);
1024
1025           ab_pkg = pkg->parent;
1026           if (ab_pkg)
1027                ab_pkg->state_status = pkg->state_status;
1028
1029           opkg_message(conf, OPKG_INFO, "Done.\n");
1030
1031           if (use_signal)
1032                signal(SIGINT, old_handler);
1033           else
1034                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1035           pkg_vec_free (replacees);
1036           return 0;
1037
1038
1039      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1040           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1041      UNWIND_CHECK_DATA_FILE_CLASHES:
1042           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1043      UNWIND_BACKUP_MODIFIED_CONFFILES:
1044           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1045      UNWIND_PREINST_CONFIGURE:
1046           preinst_configure_unwind(conf, pkg, old_pkg);
1047      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1048           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1049      UNWIND_PRERM_UPGRADE_OLD_PKG:
1050           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1051      UNWIND_REMOVE_INSTALLED_REPLACEES:
1052           pkg_remove_installed_replacees_unwind(conf, replacees);
1053
1054           opkg_message(conf, OPKG_INFO,
1055                        "  cleanup temp files\n");
1056           cleanup_temporary_files(conf, pkg);
1057
1058           opkg_message(conf, OPKG_INFO,
1059                        "Failed.\n");
1060           if (use_signal)
1061                signal(SIGINT, old_handler);
1062           else
1063                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1064
1065           pkg_vec_free (replacees);
1066           return OPKG_ERR_UNKNOWN;
1067      }
1068      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1069 }
1070
1071 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1072 {
1073      /* DPKG_INCOMPATIBILITY:
1074         dpkg does some things here that we don't do yet. Do we care?
1075
1076         1. If a version of the package is already installed, call
1077            old-prerm upgrade new-version
1078         2. If the script runs but exits with a non-zero exit status
1079            new-prerm failed-upgrade old-version
1080            Error unwind, for both the above cases:
1081            old-postinst abort-upgrade new-version
1082      */
1083      return 0;
1084 }
1085
1086 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1087 {
1088      /* DPKG_INCOMPATIBILITY:
1089         dpkg does some things here that we don't do yet. Do we care?
1090         (See prerm_upgrade_old_package for details)
1091      */
1092      return 0;
1093 }
1094
1095 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1096 {
1097      /* DPKG_INCOMPATIBILITY:
1098         dpkg does some things here that we don't do yet. Do we care?
1099         2. If a 'conflicting' package is being removed at the same time:
1100                 1. If any packages depended on that conflicting package and
1101                    --auto-deconfigure is specified, call, for each such package:
1102                    deconfigured's-prerm deconfigure \
1103                    in-favour package-being-installed version \
1104                    removing conflicting-package version
1105                 Error unwind:
1106                    deconfigured's-postinst abort-deconfigure \
1107                    in-favour package-being-installed-but-failed version \
1108                    removing conflicting-package version
1109
1110                    The deconfigured packages are marked as requiring
1111                    configuration, so that if --install is used they will be
1112                    configured again if possible.
1113                 2. To prepare for removal of the conflicting package, call:
1114                    conflictor's-prerm remove in-favour package new-version
1115                 Error unwind:
1116                    conflictor's-postinst abort-remove in-favour package new-version
1117      */
1118      return 0;
1119 }
1120
1121 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1122 {
1123      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1124         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1125         details) */
1126      return 0;
1127 }
1128
1129 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1130 {
1131      int err;
1132      char *preinst_args;
1133
1134      if (old_pkg) {
1135           char *old_version = pkg_version_str_alloc(old_pkg);
1136           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1137           free(old_version);
1138      } else if (pkg->state_status == SS_CONFIG_FILES) {
1139           char *pkg_version = pkg_version_str_alloc(pkg);
1140           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1141           free(pkg_version);
1142      } else {
1143           preinst_args = strdup("install");
1144      }
1145
1146      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1147      if (err) {
1148           opkg_message(conf, OPKG_ERROR,
1149                        "Aborting installation of %s\n", pkg->name);
1150           return 1;
1151      }
1152
1153      free(preinst_args);
1154
1155      return 0;
1156 }
1157
1158 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1159 {
1160      /* DPKG_INCOMPATIBILITY:
1161         dpkg does the following error unwind, should we?
1162         pkg->postrm abort-upgrade old-version
1163         OR pkg->postrm abort-install old-version
1164         OR pkg->postrm abort-install
1165      */
1166      return 0;
1167 }
1168
1169 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1170 {
1171      int err;
1172      conffile_list_elt_t *iter;
1173      conffile_t *cf;
1174
1175      if (conf->noaction) return 0;
1176
1177      /* Backup all modified conffiles */
1178      if (old_pkg) {
1179           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1180                char *cf_name;
1181
1182                cf = iter->data;
1183                cf_name = root_filename_alloc(conf, cf->name);
1184
1185                /* Don't worry if the conffile is just plain gone */
1186                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1187                     err = backup_make_backup(conf, cf_name);
1188                     if (err) {
1189                          return err;
1190                     }
1191                }
1192                free(cf_name);
1193           }
1194      }
1195
1196      /* Backup all conffiles that were not conffiles in old_pkg */
1197      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1198           char *cf_name;
1199           cf = (conffile_t *)iter->data;
1200           cf_name = root_filename_alloc(conf, cf->name);
1201           /* Ignore if this was a conffile in old_pkg as well */
1202           if (pkg_get_conffile(old_pkg, cf->name)) {
1203                continue;
1204           }
1205
1206           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1207                err = backup_make_backup(conf, cf_name);
1208                if (err) {
1209                     return err;
1210                }
1211           }
1212           free(cf_name);
1213      }
1214
1215      return 0;
1216 }
1217
1218 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1219 {
1220      conffile_list_elt_t *iter;
1221
1222      if (old_pkg) {
1223           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1224                backup_remove(((nv_pair_t *)iter->data)->name);
1225           }
1226      }
1227
1228      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1229           backup_remove(((nv_pair_t *)iter->data)->name);
1230      }
1231
1232      return 0;
1233 }
1234
1235
1236 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1237 {
1238      /* DPKG_INCOMPATIBILITY:
1239         opkg takes a slightly different approach than dpkg at this
1240         point.  dpkg installs each file in the new package while
1241         creating a backup for any file that is replaced, (so that it
1242         can unwind if necessary).  To avoid complexity and redundant
1243         storage, opkg doesn't do any installation until later, (at the
1244         point at which dpkg removes the backups.
1245
1246         But, we do have to check for data file clashes, since after
1247         installing a package with a file clash, removing either of the
1248         packages involved in the clash has the potential to break the
1249         other package.
1250      */
1251      str_list_t *files_list;
1252      str_list_elt_t *iter, *niter;
1253
1254      int clashes = 0;
1255
1256      files_list = pkg_get_installed_files(pkg);
1257      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1258              iter;
1259              iter = niter, niter = str_list_next(files_list, iter)) {
1260           char *root_filename;
1261           char *filename = (char *) iter->data;
1262           root_filename = root_filename_alloc(conf, filename);
1263           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1264                pkg_t *owner;
1265                pkg_t *obs;
1266                /* Pre-existing conffiles are OK */
1267                /* @@@@ should have way to check that it is a conffile -Jamey */
1268                if (backup_exists_for(root_filename)) {
1269                     continue;
1270                }
1271
1272                /* Pre-existing files are OK if force-overwrite was asserted. */
1273                if (conf->force_overwrite) {
1274                     /* but we need to change who owns this file */
1275                     file_hash_set_file_owner(conf, filename, pkg);
1276                     continue;
1277                }
1278
1279                owner = file_hash_get_file_owner(conf, filename);
1280
1281                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1282                if (owner && old_pkg) {
1283                     if (strcmp(owner->name, old_pkg->name) == 0) {
1284                          continue;
1285                     }
1286                }
1287
1288                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1289                if (owner) {
1290                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1291                     if (pkg_replaces(pkg, owner)) {
1292                          continue;
1293                     }
1294 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1295    then it's ok to overwrite. */
1296                     if (strcmp(owner->name,pkg->name)==0){
1297                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1298                          continue;
1299                     }
1300                }
1301
1302                /* Pre-existing files are OK if they are obsolete */
1303                obs = hash_table_get(&conf->obs_file_hash, filename);
1304                if (obs) {
1305                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1306                     continue;
1307                }
1308
1309                /* We have found a clash. */
1310                opkg_message(conf, OPKG_ERROR,
1311                             "Package %s wants to install file %s\n"
1312                             "\tBut that file is already provided by package ",
1313                             pkg->name, filename);
1314                if (owner) {
1315                     opkg_message(conf, OPKG_ERROR,
1316                                  "%s\n", owner->name);
1317                } else {
1318                     opkg_message(conf, OPKG_ERROR,
1319                                  "<no package>\nPlease move this file out of the way and try again.\n");
1320                }
1321                clashes++;
1322           }
1323           free(root_filename);
1324      }
1325      pkg_free_installed_files(pkg);
1326
1327      return clashes;
1328 }
1329
1330 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1331 {
1332     /* Basically that's the worst hack I could do to be able to change ownership of
1333        file list, but, being that we have no way to unwind the mods, due to structure
1334        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1335        What we do here is change the ownership of file in hash if a replace ( or similar events
1336        happens )
1337        Only the action that are needed to change name should be considered.
1338        @@@ To change after 1.0 release.
1339      */
1340      str_list_t *files_list;
1341      str_list_elt_t *iter, *niter;
1342
1343      char *root_filename = NULL;
1344
1345      int clashes = 0;
1346
1347      files_list = pkg_get_installed_files(pkg);
1348      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1349              iter;
1350              iter = niter, niter = str_list_next(files_list, niter)) {
1351           char *filename = (char *) iter->data;
1352           if (root_filename) {
1353               free(root_filename);
1354               root_filename = NULL;
1355           }
1356           root_filename = root_filename_alloc(conf, filename);
1357           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1358                pkg_t *owner;
1359
1360                owner = file_hash_get_file_owner(conf, filename);
1361
1362                if (conf->force_overwrite) {
1363                     /* but we need to change who owns this file */
1364                     file_hash_set_file_owner(conf, filename, pkg);
1365                     continue;
1366                }
1367
1368
1369                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1370                if (owner) {
1371                     if (pkg_replaces(pkg, owner)) {
1372 /* It's now time to change the owner of that file.
1373    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1374                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1375                          file_hash_set_file_owner(conf, filename, pkg);
1376                          continue;
1377                     }
1378                }
1379
1380           }
1381      }
1382      if (root_filename) {
1383          free(root_filename);
1384          root_filename = NULL;
1385      }
1386      pkg_free_installed_files(pkg);
1387
1388      return clashes;
1389 }
1390
1391 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1392 {
1393      /* Nothing to do since check_data_file_clashes doesn't change state */
1394      return 0;
1395 }
1396
1397 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1398 {
1399      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1400         1. If the package is being upgraded, call
1401            old-postrm upgrade new-version
1402         2. If this fails, attempt:
1403            new-postrm failed-upgrade old-version
1404         Error unwind, for both cases:
1405            old-preinst abort-upgrade new-version    */
1406      return 0;
1407 }
1408
1409 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1410 {
1411      /* DPKG_INCOMPATIBILITY:
1412         dpkg does some things here that we don't do yet. Do we care?
1413         (See postrm_upgrade_old_pkg for details)
1414      */
1415     return 0;
1416 }
1417
1418 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1419 {
1420      int err;
1421      str_list_t *old_files;
1422      str_list_elt_t *of;
1423      str_list_t *new_files;
1424      str_list_elt_t *nf;
1425      hash_table_t new_files_table;
1426
1427      if (old_pkg == NULL) {
1428           return 0;
1429      }
1430
1431      old_files = pkg_get_installed_files(old_pkg);
1432      new_files = pkg_get_installed_files(pkg);
1433
1434      new_files_table.entries = NULL;
1435      hash_table_init("new_files" , &new_files_table, 20);
1436      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1437          if (nf && nf->data)
1438             hash_table_insert(&new_files_table, nf->data, nf->data);
1439      }
1440
1441      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1442           pkg_t *owner;
1443           char *old, *new;
1444           old = (char *)of->data;
1445           new = (char *) hash_table_get (&new_files_table, old);
1446           if (new)
1447                continue;
1448
1449           if (file_is_dir(old)) {
1450                continue;
1451           }
1452           owner = file_hash_get_file_owner(conf, old);
1453           if (owner != old_pkg) {
1454                /* in case obsolete file no longer belongs to old_pkg */
1455                continue;
1456           }
1457
1458           /* old file is obsolete */
1459           opkg_message(conf, OPKG_INFO,
1460                        "    removing obsolete file %s\n", old);
1461           if (!conf->noaction) {
1462                err = unlink(old);
1463                if (err) {
1464                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1465                                  strerror(errno));
1466                }
1467           }
1468      }
1469
1470      hash_table_deinit(&new_files_table);
1471      pkg_free_installed_files(old_pkg);
1472      pkg_free_installed_files(pkg);
1473
1474      return 0;
1475 }
1476
1477 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1478 {
1479      int i;
1480      int err = 0;
1481      char *globpattern;
1482      glob_t globbuf;
1483      if (0) {
1484           if (!pkg->dest) {
1485                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1486                return -1;
1487           }
1488           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1489           err = glob(globpattern, 0, NULL, &globbuf);
1490           free(globpattern);
1491           if (err) {
1492                return err;
1493           }
1494           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1495           for (i = 0; i < globbuf.gl_pathc; i++) {
1496                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1497                             globbuf.gl_pathv[i], old_pkg->name);
1498                if (!conf->noaction)
1499                     unlink(globbuf.gl_pathv[i]);
1500           }
1501           globfree(&globbuf);
1502      }
1503      return err;
1504 }
1505
1506 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1507 {
1508      int ret;
1509      char *prefix;
1510
1511      if (old_pkg)
1512           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1513      sprintf_alloc(&prefix, "%s.", pkg->name);
1514      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1515                                                         pkg->dest->info_dir,
1516                                                         prefix);
1517      free(prefix);
1518      return ret;
1519 }
1520
1521 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1522 {
1523      /* DPKG_INCOMPATIBILITY:
1524         This is a fairly sophisticated dpkg operation. Shall we
1525         skip it? */
1526
1527      /* Any packages all of whose files have been overwritten during the
1528         installation, and which aren't required for dependencies, are
1529         considered to have been removed. For each such package
1530         1. disappearer's-postrm disappear overwriter overwriter-version
1531         2. The package's maintainer scripts are removed
1532         3. It is noted in the status database as being in a sane state,
1533            namely not installed (any conffiles it may have are ignored,
1534            rather than being removed by dpkg). Note that disappearing
1535            packages do not have their prerm called, because dpkg doesn't
1536            know in advance that the package is going to vanish.
1537      */
1538      return 0;
1539 }
1540
1541 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1542 {
1543      int err;
1544
1545      /* opkg takes a slightly different approach to data file backups
1546         than dpkg. Rather than removing backups at this point, we
1547         actually do the data file installation now. See comments in
1548         check_data_file_clashes() for more details. */
1549
1550      opkg_message(conf, OPKG_INFO,
1551                   "    extracting data files to %s\n", pkg->dest->root_dir);
1552      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1553      if (err) {
1554           return err;
1555      }
1556
1557      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1558         so we can't save ourself from removing important packages
1559         At this point we (should) have extracted the .control file, so it
1560         would be a good idea to reload the data in it, and set the Essential
1561         state in *pkg. From now on the Essential is back in status file and
1562         we can protect again.
1563         We should operate this way:
1564         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1565         check for "Essential" in it
1566         set the value in pkg->essential.
1567         This new routine could be useful also for every other flag
1568         Pigi: 16/03/2004 */
1569      set_flags_from_control(conf, pkg) ;
1570
1571      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1572      err = pkg_write_filelist(conf, pkg);
1573      if (err)
1574           return err;
1575
1576      /* XXX: FEATURE: opkg should identify any files which existed
1577         before installation and which were overwritten, (see
1578         check_data_file_clashes()). What it must do is remove any such
1579         files from the filelist of the old package which provided the
1580         file. Otherwise, if the old package were removed at some point
1581         it would break the new package. Removing the new package will
1582         also break the old one, but this cannot be helped since the old
1583         package's file has already been deleted. This is the importance
1584         of check_data_file_clashes(), and only allowing opkg to install
1585         a clashing package with a user force. */
1586
1587      return 0;
1588 }
1589
1590 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1591 {
1592      conffile_list_elt_t *iter;
1593      conffile_t *cf;
1594      char *cf_backup;
1595
1596     char *md5sum;
1597
1598
1599      if (conf->noaction) return 0;
1600
1601      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1602           char *root_filename;
1603           cf = (conffile_t *)iter->data;
1604           root_filename = root_filename_alloc(conf, cf->name);
1605
1606           /* Might need to initialize the md5sum for each conffile */
1607           if (cf->value == NULL) {
1608                cf->value = file_md5sum_alloc(root_filename);
1609           }
1610
1611           if (!file_exists(root_filename)) {
1612                free(root_filename);
1613                continue;
1614           }
1615
1616           cf_backup = backup_filename_alloc(root_filename);
1617
1618
1619           if (file_exists(cf_backup)) {
1620               /* Let's compute md5 to test if files are changed */
1621               md5sum = file_md5sum_alloc(cf_backup);
1622               if (strcmp( cf->value,md5sum) != 0 ) {
1623                   if (conf->force_maintainer) {
1624                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1625                   } else if (conf->force_defaults
1626                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1627                       rename(cf_backup, root_filename);
1628                   }
1629               }
1630               unlink(cf_backup);
1631               free(md5sum);
1632           }
1633
1634           free(cf_backup);
1635           free(root_filename);
1636      }
1637
1638      return 0;
1639 }
1640
1641 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1642 {
1643      char *response;
1644      const char *short_file_name;
1645
1646      short_file_name = strrchr(file_name, '/');
1647      if (short_file_name) {
1648           short_file_name++;
1649      } else {
1650           short_file_name = file_name;
1651      }
1652
1653      while (1) {
1654           response = get_user_response("    Configuration file '%s'\n"
1655                                        "    ==> File on system created by you or by a script.\n"
1656                                        "    ==> File also in package provided by package maintainer.\n"
1657                                        "       What would you like to do about it ?  Your options are:\n"
1658                                        "        Y or I  : install the package maintainer's version\n"
1659                                        "        N or O  : keep your currently-installed version\n"
1660                                        "          D     : show the differences between the versions (if diff is installed)\n"
1661                                        "     The default action is to keep your current version.\n"
1662                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1663           if (strcmp(response, "y") == 0
1664               || strcmp(response, "i") == 0
1665               || strcmp(response, "yes") == 0) {
1666                free(response);
1667                return 0;
1668           }
1669
1670           if (strcmp(response, "d") == 0) {
1671                char *cmd;
1672
1673                free(response);
1674                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1675                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1676                xsystem(cmd);
1677                free(cmd);
1678                printf("    [Press ENTER to continue]\n");
1679                response = file_read_line_alloc(stdin);
1680                free(response);
1681                continue;
1682           }
1683
1684           free(response);
1685           return 1;
1686      }
1687 }
1688
1689 /* XXX: CLEANUP: I'd like to move all of the code for
1690    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1691    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1692    pkg_deinit for example). */
1693 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1694 {
1695      DIR *tmp_dir;
1696      struct dirent *dirent;
1697      char *tmp_file;
1698
1699 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1700 #error
1701      opkg_message(conf, OPKG_DEBUG,
1702                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1703                   __FUNCTION__, pkg->tmp_unpack_dir);
1704      return 0;
1705 #endif
1706
1707      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1708           tmp_dir = opendir(pkg->tmp_unpack_dir);
1709           if (tmp_dir) {
1710                while (1) {
1711                     dirent = readdir(tmp_dir);
1712                     if (dirent == NULL) {
1713                          break;
1714                     }
1715                     sprintf_alloc(&tmp_file, "%s/%s",
1716                                   pkg->tmp_unpack_dir, dirent->d_name);
1717                     if (! file_is_dir(tmp_file)) {
1718                          unlink(tmp_file);
1719                     }
1720                     free(tmp_file);
1721                }
1722                closedir(tmp_dir);
1723                rmdir(pkg->tmp_unpack_dir);
1724                free(pkg->tmp_unpack_dir);
1725                pkg->tmp_unpack_dir = NULL;
1726           }
1727      }
1728
1729      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1730                   pkg->name, pkg->local_filename, conf->tmp_dir);
1731      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1732           unlink(pkg->local_filename);
1733           free(pkg->local_filename);
1734           pkg->local_filename = NULL;
1735      }
1736
1737      return 0;
1738 }
1739
1740 static char *backup_filename_alloc(const char *file_name)
1741 {
1742      char *backup;
1743
1744      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1745
1746      return backup;
1747 }
1748
1749 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1750 {
1751      int err;
1752      char *backup;
1753
1754      backup = backup_filename_alloc(file_name);
1755      err = file_copy(file_name, backup);
1756      if (err) {
1757           opkg_message(conf, OPKG_ERROR,
1758                        "%s: Failed to copy %s to %s\n",
1759                        __FUNCTION__, file_name, backup);
1760      }
1761
1762      free(backup);
1763
1764      return err;
1765 }
1766
1767 static int backup_exists_for(const char *file_name)
1768 {
1769      int ret;
1770      char *backup;
1771
1772      backup = backup_filename_alloc(file_name);
1773
1774      ret = file_exists(backup);
1775
1776      free(backup);
1777
1778      return ret;
1779 }
1780
1781 static int backup_remove(const char *file_name)
1782 {
1783      char *backup;
1784
1785      backup = backup_filename_alloc(file_name);
1786      unlink(backup);
1787      free(backup);
1788
1789      return 0;
1790 }
1791