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      if (old) {
 109           old_version = pkg_version_str_alloc(old);
 110           new_version = pkg_version_str_alloc(pkg);
 111
 112           cmp = pkg_compare_versions(old, pkg);
 113           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 114              cmp = -1 ;                                       /* then we force opkg to downgrade */
 115                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 116                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 117           }
 118           if (cmp > 0) {
 119                  opkg_message(conf, OPKG_NOTICE,
 120                               "Not downgrading package %s on %s from %s to %s.\n",
 121                               old->name, old->dest->name, old_version, new_version);
 122                  pkg->state_want = SW_DEINSTALL;
 123                  pkg->state_flag |= SF_OBSOLETE;
 124                  free(old_version);
 125                  free(new_version);
 126                  return 0;
 127           } else {
 128                free(old_version);
 129                free(new_version);
 130           }
 131      }
 132
 133      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 134      return opkg_install_pkg(conf, pkg,0);
 135 }
 136
 137 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 138 {
 139      int cmp, err = 0;
 140      pkg_t *old, *new;
 141      char *old_version, *new_version;
 142
 143      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 144      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 145      if ( old )
 146         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 147
 148      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 149      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 150      if ( new )
 151         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 152
 153 /* Pigi Basically here is broken the version stuff.
 154    What's happening is that nothing provide the version to differents
 155    functions, so the returned struct is always the latest.
 156    That's why the install by name don't work.
 157 */
 158      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 159
 160      if ( old )
 161         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 162      if ( new )
 163         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 164      opkg_message(conf, OPKG_DEBUG2, " \n");
 165
 166      if (new == NULL) {
 167           if (err)
 168             return err;
 169           else
 170             return OPKG_PKG_HAS_NO_CANDIDATE;
 171      }
 172
 173      new->state_flag |= SF_USER;
 174      if (old) {
 175           old_version = pkg_version_str_alloc(old);
 176           new_version = pkg_version_str_alloc(new);
 177
 178           cmp = pkg_compare_versions(old, new);
 179           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 180              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 181              cmp = -1 ;                                       /* then we force opkg to downgrade */
 182                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 183                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 184           }
 185           opkg_message(conf, OPKG_DEBUG,
 186                        "Comparing visible versions of pkg %s:"
 187                        "\n\t%s is installed "
 188                        "\n\t%s is available "
 189                        "\n\t%d was comparison result\n",
 190                        pkg_name, old_version, new_version, cmp);
 191           if (cmp == 0 && !conf->force_reinstall) {
 192                opkg_message(conf, OPKG_NOTICE,
 193                             "Package %s (%s) installed in %s is up to date.\n",
 194                             old->name, old_version, old->dest->name);
 195                free(old_version);
 196                free(new_version);
 197                return 0;
 198           } else if (cmp > 0) {
 199                opkg_message(conf, OPKG_NOTICE,
 200                             "Not downgrading package %s on %s from %s to %s.\n",
 201                             old->name, old->dest->name, old_version, new_version);
 202                free(old_version);
 203                free(new_version);
 204                return 0;
 205           } else if (cmp < 0) {
 206                new->dest = old->dest;
 207                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 208           }
 209      }
 210
 211      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 212         supposed to be an opkg_error_t, but opkg_install_pkg could
 213         return any kind of integer, (might be errno from a syscall,
 214         etc.). This is a real mess and will need to be cleaned up if
 215         anyone ever wants to make a nice libopkg. */
 216
 217      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 218      return opkg_install_pkg(conf, new,0);
 219 }
 220
 221 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 222 {
 223      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 224      int i;
 225      opkg_error_t err;
 226      abstract_pkg_t *ppkg ;
 227
 228      if (providers == NULL)
 229           return OPKG_PKG_HAS_NO_CANDIDATE;
 230
 231      for (i = 0; i < providers->len; i++) {
 232           ppkg = abstract_pkg_vec_get(providers, i);
 233           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 234           err = opkg_install_by_name(conf, ppkg->name);
 235           if (err)
 236                return err;
 237 /* XXX Maybe ppkg should be freed ? */
 238      }
 239      return 0;
 240 }
 241
 242 /*
 243  * Walk dependence graph starting with pkg, collect packages to be
 244  * installed into pkgs_needed, in dependence order.
 245  */
 246 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 247 {
 248      int i, err;
 249      pkg_vec_t *depends = pkg_vec_alloc();
 250      char **unresolved = NULL;
 251      int ndepends;
 252
 253      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 254                                                         pkg, depends,
 255                                                         &unresolved);
 256
 257      if (unresolved) {
 258           opkg_message(conf, OPKG_ERROR,
 259                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 260                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 261           while (*unresolved) {
 262                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 263                unresolved++;
 264           }
 265           opkg_message(conf, OPKG_ERROR, "\n");
 266           if (! conf->force_depends) {
 267                opkg_message(conf, OPKG_INFO,
 268                             "This could mean that your package list is out of date or that the packages\n"
 269                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 270                             "of this problem try again with the '-force-depends' option.\n");
 271                pkg_vec_free(depends);
 272                return OPKG_PKG_DEPS_UNSATISFIED;
 273           }
 274      }
 275
 276      if (ndepends <= 0) {
 277           pkg_vec_free(depends);
 278           return 0;
 279      }
 280
 281      for (i = 0; i < depends->len; i++) {
 282           pkg_t *dep = depends->pkgs[i];
 283           /* The package was uninstalled when we started, but another
 284              dep earlier in this loop may have depended on it and pulled
 285              it in, so check first. */
 286           if ((dep->state_status != SS_INSTALLED)
 287               && (dep->state_status != SS_UNPACKED)
 288               && (dep->state_want != SW_INSTALL)) {
 289
 290                /* Mark packages as to-be-installed */
 291                dep->state_want = SW_INSTALL;
 292
 293                /* Dependencies should be installed the same place as pkg */
 294                if (dep->dest == NULL) {
 295                     dep->dest = pkg->dest;
 296                }
 297
 298                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 299                if (err) {
 300                     pkg_vec_free(depends);
 301                     return err;
 302                }
 303           }
 304      }
 305      if (pkgs_needed)
 306           pkg_vec_insert(pkgs_needed, pkg);
 307
 308      pkg_vec_free(depends);
 309
 310      return 0;
 311 }
 312
 313 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 314 {
 315      int i, err;
 316      pkg_vec_t *depends = pkg_vec_alloc();
 317      pkg_t *dep;
 318      char **unresolved = NULL;
 319      int ndepends;
 320
 321      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 322                                                         pkg, depends,
 323                                                         &unresolved);
 324
 325      if (unresolved) {
 326           opkg_message(conf, OPKG_ERROR,
 327                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 328                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 329           while (*unresolved) {
 330                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 331                unresolved++;
 332           }
 333           opkg_message(conf, OPKG_ERROR, "\n");
 334           if (! conf->force_depends) {
 335                opkg_message(conf, OPKG_INFO,
 336                             "This could mean that your package list is out of date or that the packages\n"
 337                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 338                             "of this problem try again with the '-force-depends' option.\n");
 339                pkg_vec_free(depends);
 340                return OPKG_PKG_DEPS_UNSATISFIED;
 341           }
 342      }
 343
 344      if (ndepends <= 0) {
 345           pkg_vec_free(depends);
 346           return 0;
 347      }
 348
 349      /* Mark packages as to-be-installed */
 350      for (i=0; i < depends->len; i++) {
 351           /* Dependencies should be installed the same place as pkg */
 352           if (depends->pkgs[i]->dest == NULL) {
 353                depends->pkgs[i]->dest = pkg->dest;
 354           }
 355           depends->pkgs[i]->state_want = SW_INSTALL;
 356      }
 357
 358      for (i = 0; i < depends->len; i++) {
 359           dep = depends->pkgs[i];
 360           /* The package was uninstalled when we started, but another
 361              dep earlier in this loop may have depended on it and pulled
 362              it in, so check first. */
 363           if ((dep->state_status != SS_INSTALLED)
 364               && (dep->state_status != SS_UNPACKED)) {
 365                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 366                err = opkg_install_pkg(conf, dep,0);
 367                /* mark this package as having been automatically installed to
 368                 * satisfy a dependancy */
 369                dep->auto_installed = 1;
 370                if (err) {
 371                     pkg_vec_free(depends);
 372                     return err;
 373                }
 374           }
 375      }
 376
 377      pkg_vec_free(depends);
 378
 379      return 0;
 380 }
 381
 382
 383 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 384 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 385 {
 386      if (conf->nodeps == 0) {
 387           int i;
 388           pkg_vec_t *installed = pkg_vec_alloc();
 389           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 390           for (i = 0; i < installed->len; i++) {
 391                pkg_t *pkg = installed->pkgs[i];
 392                satisfy_dependencies_for(conf, pkg);
 393           }
 394           pkg_vec_free(installed);
 395      }
 396      return 0;
 397 }
 398
 399
 400 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 401 {
 402      int i;
 403      pkg_vec_t *conflicts = NULL;
 404      int level;
 405      const char *prefix;
 406      if (conf->force_depends) {
 407           level = OPKG_NOTICE;
 408           prefix = "Warning";
 409      } else {
 410           level = OPKG_ERROR;
 411           prefix = "ERROR";
 412      }
 413
 414      if (!conf->force_depends)
 415           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 416
 417      if (conflicts) {
 418           opkg_message(conf, level,
 419                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 420           i = 0;
 421           while (i < conflicts->len)
 422                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 423           opkg_message(conf, level, "\n");
 424           pkg_vec_free(conflicts);
 425           return OPKG_PKG_DEPS_UNSATISFIED;
 426      }
 427      return 0;
 428 }
 429
 430 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 431 {
 432      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 433      str_list_elt_t *iter, *niter;
 434
 435      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 436              iter;
 437              iter = niter, niter = str_list_next(new_list, niter)) {
 438           char *new_file = (char *)iter->data;
 439           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 440           if (!new_file)
 441                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 442           if (!owner || (owner == old_pkg))
 443                file_hash_set_file_owner(conf, new_file, new_pkg);
 444      }
 445      if (old_pkg) {
 446           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 447           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 448                   iter;
 449                   iter = niter, niter = str_list_next(old_list, niter)) {
 450                char *old_file = (char *)iter->data;
 451                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 452                if (owner == old_pkg) {
 453                     /* obsolete */
 454                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 455                }
 456           }
 457           pkg_free_installed_files(old_pkg);
 458      }
 459      pkg_free_installed_files(new_pkg);
 460      return 0;
 461 }
 462
 463 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 464 {
 465     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 466
 467     /* sma 6.20.02:  yup; here's the first bit */
 468     /*
 469      * XXX: BUG easy for cworth
 470      * 1) please point the call below to the correct current root destination
 471      * 2) we need to resolve how to check the required space for a pending pkg,
 472      *    my diddling with the .opk file size below isn't going to cut it.
 473      * 3) return a proper error code instead of 1
 474      */
 475      int comp_size, blocks_available;
 476      char *root_dir;
 477
 478      if (!conf->force_space && pkg->installed_size != NULL) {
 479           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 480           blocks_available = get_available_blocks(root_dir);
 481
 482           comp_size = strtoul(pkg->installed_size, NULL, 0);
 483           /* round up a blocks count without doing fancy-but-slow casting jazz */
 484           comp_size = (int)((comp_size + 1023) / 1024);
 485
 486           if (comp_size >= blocks_available) {
 487                opkg_message(conf, OPKG_ERROR,
 488                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 489                             blocks_available, root_dir, pkg->name, comp_size);
 490                return ENOSPC;
 491           }
 492      }
 493      return 0;
 494 }
 495
 496 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 497 {
 498      int err;
 499      char *conffiles_file_name;
 500      char *root_dir;
 501      FILE *conffiles_file;
 502
 503      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 504
 505      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 506      if (pkg->tmp_unpack_dir == NULL) {
 507           opkg_message(conf, OPKG_ERROR,
 508                        "%s: Failed to create temporary directory '%s': %s\n",
 509                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 510           return errno;
 511      }
 512
 513      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 514      if (err) {
 515           return err;
 516      }
 517
 518      /* XXX: CLEANUP: There might be a cleaner place to read in the
 519         conffiles. Seems like I should be able to get everything to go
 520         through pkg_init_from_file. If so, maybe it would make sense to
 521         move all of unpack_pkg_control_files to that function. */
 522
 523      /* Don't need to re-read conffiles if we already have it */
 524      if (!nv_pair_list_empty(&pkg->conffiles)) {
 525           return 0;
 526      }
 527
 528      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 529      if (! file_exists(conffiles_file_name)) {
 530           free(conffiles_file_name);
 531           return 0;
 532      }
 533
 534      conffiles_file = fopen(conffiles_file_name, "r");
 535      if (conffiles_file == NULL) {
 536           fprintf(stderr, "%s: failed to open %s: %s\n",
 537                   __FUNCTION__, conffiles_file_name, strerror(errno));
 538           free(conffiles_file_name);
 539           return errno;
 540      }
 541      free(conffiles_file_name);
 542
 543      while (1) {
 544           char *cf_name;
 545           char *cf_name_in_dest;
 546
 547           cf_name = file_read_line_alloc(conffiles_file);
 548           if (cf_name == NULL) {
 549                break;
 550           }
 551           str_chomp(cf_name);
 552           if (cf_name[0] == '\0') {
 553                continue;
 554           }
 555
 556           /* Prepend dest->root_dir to conffile name.
 557              Take pains to avoid multiple slashes. */
 558           root_dir = pkg->dest->root_dir;
 559           if (conf->offline_root)
 560                /* skip the offline_root prefix */
 561                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 562           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 563                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 564
 565           /* Can't get an md5sum now, (file isn't extracted yet).
 566              We'll wait until resolve_conffiles */
 567           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 568
 569           free(cf_name);
 570           free(cf_name_in_dest);
 571      }
 572
 573      fclose(conffiles_file);
 574
 575      return 0;
 576 }
 577
 578 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 579 {
 580     int i, j, found;
 581     char *buf, *d_str;
 582     pkg_t *p;
 583     if (!old_pkg)
 584         return 0;
 585     if (!pkg) {
 586         fprintf(stderr, "pkg shall not be NULL here.  please send to the bugzilla!! [%s %d]\n", __FILE__, __LINE__);
 587         return -1;
 588     }
 589     if (old_pkg->depends_count == 0)
 590         return 0;
 591     for (i=0;i<old_pkg->depends_count;i++) {
 592         found = 0;
 593         for (j=0;j<pkg->depends_count;j++) {
 594             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 595                 found = 1;
 596                 break;
 597             }
 598         }
 599         if (found)
 600             continue;
 601         d_str = old_pkg->depends_str[i];
 602         buf = calloc (1, strlen (d_str) + 1);
 603         j=0;
 604         while (d_str[j] != '\0' && d_str[j] != ' ') {
 605             buf[j]=d_str[j];
 606             ++j;
 607         }
 608         buf[j]='\0';
 609         buf = realloc (buf, strlen (buf) + 1);
 610         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 611         if (!p) {
 612             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 613             free(buf);
 614             continue;
 615         }
 616         if (p->auto_installed) {
 617             int deps;
 618             abstract_pkg_t **dependents;
 619             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 620             if (deps == 0) {
 621                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 622                 opkg_remove_pkg(conf, p, 0);
 623             } else
 624                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 625         }
 626         free(buf);
 627     }
 628     return 0;
 629 }
 630
 631 /* returns number of installed replacees */
 632 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 633 {
 634      abstract_pkg_t **replaces = pkg->replaces;
 635      int replaces_count = pkg->replaces_count;
 636      int i, j;
 637      for (i = 0; i < replaces_count; i++) {
 638           abstract_pkg_t *ab_pkg = replaces[i];
 639           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 640           if (pkg_vec) {
 641                for (j = 0; j < pkg_vec->len; j++) {
 642                     pkg_t *replacee = pkg_vec->pkgs[j];
 643                     if (!pkg_conflicts(pkg, replacee))
 644                          continue;
 645                     if (replacee->state_status == SS_INSTALLED) {
 646                          pkg_vec_insert(installed_replacees, replacee);
 647                     }
 648                }
 649           }
 650      }
 651      return installed_replacees->len;
 652 }
 653
 654 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 655 {
 656      int i;
 657      int replaces_count = replacees->len;
 658      for (i = 0; i < replaces_count; i++) {
 659           pkg_t *replacee = replacees->pkgs[i];
 660           int err;
 661           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 662           err = opkg_remove_pkg(conf, replacee,0);
 663           if (err)
 664                return err;
 665      }
 666      return 0;
 667 }
 668
 669 /* to unwind the removal: make sure they are installed */
 670 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 671 {
 672      int i, err;
 673      int replaces_count = replacees->len;
 674      for (i = 0; i < replaces_count; i++) {
 675           pkg_t *replacee = replacees->pkgs[i];
 676           if (replacee->state_status != SS_INSTALLED) {
 677                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 678                err = opkg_install_pkg(conf, replacee,0);
 679                if (err)
 680                     return err;
 681           }
 682      }
 683      return 0;
 684 }
 685
 686 int caught_sigint = 0;
 687 static void opkg_install_pkg_sigint_handler(int sig)
 688 {
 689      caught_sigint = sig;
 690 }
 691
 692 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 693 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 694 {
 695      if (old_pkg) {
 696           char message_out[15];
 697           char *old_version = pkg_version_str_alloc(old_pkg);
 698           char *new_version = pkg_version_str_alloc(pkg);
 699           int cmp = pkg_compare_versions(old_pkg, pkg);
 700           int rc = 0;
 701
 702           memset(message_out,'\x0',15);
 703           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 704           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 705              cmp = -1 ;                                       /* then we force opkg to downgrade */
 706              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 707                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 708           }
 709
 710           if (cmp > 0) {
 711                opkg_message(conf, OPKG_NOTICE,
 712                             "Not downgrading package %s on %s from %s to %s.\n",
 713                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 714                rc = 1;
 715           } else if (cmp < 0) {
 716                opkg_message(conf, OPKG_NOTICE,
 717                             "%s%s on %s from %s to %s...\n",
 718                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 719                pkg->dest = old_pkg->dest;
 720                rc = 0;
 721           } else /* cmp == 0 */ {
 722                if (conf->force_reinstall) {
 723                     opkg_message(conf, OPKG_NOTICE,
 724                                  "Reinstalling %s (%s) on %s...\n",
 725                                  pkg->name, new_version, old_pkg->dest->name);
 726                     pkg->dest = old_pkg->dest;
 727                     rc = 0;
 728                } else {
 729                     opkg_message(conf, OPKG_NOTICE,
 730                                  "Not installing %s (%s) on %s -- already installed.\n",
 731                                  pkg->name, new_version, old_pkg->dest->name);
 732                     rc = 1;
 733                }
 734           }
 735           free(old_version);
 736           free(new_version);
 737           return rc;
 738      } else {
 739       char message_out[15] ;
 740       memset(message_out,'\x0',15);
 741       if ( message )
 742           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 743       else
 744           strncpy( message_out,"Installing ",strlen("Installing ") );
 745           char *version = pkg_version_str_alloc(pkg);
 746
 747           opkg_message(conf, OPKG_NOTICE,
 748                        "%s%s (%s) to %s...\n", message_out,
 749                        pkg->name, version, pkg->dest->name);
 750           free(version);
 751           return 0;
 752      }
 753 }
 754
 755 /**
 756  *  @brief Really install a pkg_t
 757  */
 758 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 759 {
 760      int err = 0;
 761      int message = 0;
 762      pkg_t *old_pkg = NULL;
 763      pkg_vec_t *replacees;
 764      abstract_pkg_t *ab_pkg = NULL;
 765      int old_state_flag;
 766      char* file_md5;
 767 #ifdef HAVE_SHA256
 768      char* file_sha256;
 769 #endif
 770      char *pkgid;
 771
 772      if ( from_upgrade )
 773         message = 1;            /* Coming from an upgrade, and should change the output message */
 774
 775      if (!pkg) {
 776           opkg_message(conf, OPKG_ERROR,
 777                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 778           return OPKG_INSTALL_ERR_INTERNAL;
 779      }
 780
 781      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 782
 783      if (!pkg_arch_supported(conf, pkg)) {
 784           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 785                        pkg->architecture, pkg->name);
 786           return OPKG_INSTALL_ERR_INTERNAL;
 787      }
 788      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 789           err = satisfy_dependencies_for(conf, pkg);
 790           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 791
 792           opkg_message(conf, OPKG_NOTICE,
 793                        "Package %s is already installed in %s.\n",
 794                        pkg->name, pkg->dest->name);
 795           return 0;
 796      }
 797
 798      if (pkg->dest == NULL) {
 799           pkg->dest = conf->default_dest;
 800      }
 801
 802      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 803
 804      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 805      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 806
 807      pkg->state_want = SW_INSTALL;
 808      if (old_pkg){
 809          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 810      }
 811
 812
 813      /* Abhaya: conflicts check */
 814      err = check_conflicts_for(conf, pkg);
 815      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 816
 817      /* this setup is to remove the upgrade scenario in the end when
 818         installing pkg A, A deps B & B deps on A. So both B and A are
 819         installed. Then A's installation is started resulting in an
 820         uncecessary upgrade */
 821      if (pkg->state_status == SS_INSTALLED
 822          && conf->force_reinstall == 0) return 0;
 823
 824      err = verify_pkg_installable(conf, pkg);
 825      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 826
 827      if (pkg->local_filename == NULL) {
 828           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 829           if (err) {
 830                opkg_message(conf, OPKG_ERROR,
 831                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 832                             pkg->name);
 833                return OPKG_INSTALL_ERR_DOWNLOAD;
 834           }
 835      }
 836
 837      /* check that the repository is valid */
 838      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 839      char *list_file_name, *sig_file_name, *lists_dir;
 840
 841      /* check to ensure the package has come from a repository */
 842      if (conf->check_signature && pkg->src)
 843      {
 844        sprintf_alloc (&lists_dir, "%s",
 845                      (conf->restrict_to_default_dest)
 846                       ? conf->default_dest->lists_dir
 847                       : conf->lists_dir);
 848        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 849        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 850
 851        if (file_exists (sig_file_name))
 852        {
 853          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
 854            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 855                            list_file_name);
 856            return OPKG_INSTALL_ERR_SIGNATURE;
 857          }
 858        }else{
 859          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 860                          "Perhaps you need to run 'opkg update'?\n");
 861          return OPKG_INSTALL_ERR_SIGNATURE;
 862        }
 863
 864        free (lists_dir);
 865        free (list_file_name);
 866        free (sig_file_name);
 867      }
 868      #endif
 869
 870      /* Check for md5 values */
 871      if (pkg->md5sum)
 872      {
 873          file_md5 = file_md5sum_alloc(pkg->local_filename);
 874          if (strcmp(file_md5, pkg->md5sum))
 875          {
 876               opkg_message(conf, OPKG_ERROR,
 877                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 878                            pkg->name);
 879               free(file_md5);
 880               return OPKG_INSTALL_ERR_MD5;
 881          }
 882          free(file_md5);
 883      }
 884
 885 #ifdef HAVE_SHA256
 886      /* Check for sha256 value */
 887      if(pkg->sha256sum)
 888      {
 889          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 890          if (strcmp(file_sha256, pkg->sha256sum))
 891          {
 892               opkg_message(conf, OPKG_ERROR,
 893                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 894                            pkg->name);
 895               free(file_sha256);
 896               return OPKG_INSTALL_ERR_SHA256;
 897          }
 898          free(file_sha256);
 899      }
 900 #endif
 901
 902      if (pkg->tmp_unpack_dir == NULL) {
 903           unpack_pkg_control_files(conf, pkg);
 904      }
 905
 906      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 907 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 908 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 909      err = update_file_ownership(conf, pkg, old_pkg);
 910      if (err) { return OPKG_ERR_UNKNOWN; }
 911
 912      if (conf->nodeps == 0) {
 913           err = satisfy_dependencies_for(conf, pkg);
 914           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 915      }
 916
 917      replacees = pkg_vec_alloc();
 918      pkg_get_installed_replacees(conf, pkg, replacees);
 919
 920      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 921      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 922      free (pkgid);
 923
 924      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 925      {
 926           sigset_t newset, oldset;
 927           sighandler_t old_handler = NULL;
 928           int use_signal = 0;
 929           caught_sigint = 0;
 930           if (use_signal) {
 931                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 932           } else {
 933                sigemptyset(&newset);
 934                sigaddset(&newset, SIGINT);
 935                sigprocmask(SIG_BLOCK, &newset, &oldset);
 936           }
 937
 938           opkg_state_changed++;
 939           pkg->state_flag |= SF_FILELIST_CHANGED;
 940
 941           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 942
 943           /* XXX: BUG: we really should treat replacement more like an upgrade
 944            *      Instead, we're going to remove the replacees
 945            */
 946           err = pkg_remove_installed_replacees(conf, replacees);
 947           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 948
 949           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 950           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 951
 952           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 953           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 954
 955           err = preinst_configure(conf, pkg, old_pkg);
 956           if (err) goto UNWIND_PREINST_CONFIGURE;
 957
 958           err = backup_modified_conffiles(conf, pkg, old_pkg);
 959           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 960
 961           err = check_data_file_clashes(conf, pkg, old_pkg);
 962           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 963
 964           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 965           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 966
 967           if (conf->noaction) return 0;
 968
 969           /* point of no return: no unwinding after this */
 970           if (old_pkg && !conf->force_reinstall) {
 971                old_pkg->state_want = SW_DEINSTALL;
 972
 973                if (old_pkg->state_flag & SF_NOPRUNE) {
 974                     opkg_message(conf, OPKG_INFO,
 975                                  "  not removing obsolesced files because package marked noprune\n");
 976                } else {
 977                     opkg_message(conf, OPKG_INFO,
 978                                  "  removing obsolesced files\n");
 979                     remove_obsolesced_files(conf, pkg, old_pkg);
 980                }
 981                /* removing files from old package, to avoid ghost files */
 982                remove_data_files_and_list(conf, old_pkg);
 983 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 984                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 985                remove_postrm(conf, old_pkg);
 986 /* Pigi */
 987
 988           }
 989
 990
 991           opkg_message(conf, OPKG_INFO,
 992                        "  installing maintainer scripts\n");
 993           install_maintainer_scripts(conf, pkg, old_pkg);
 994
 995           /* the following just returns 0 */
 996           remove_disappeared(conf, pkg);
 997
 998           opkg_message(conf, OPKG_INFO,
 999                        "  installing data files\n");
1000           install_data_files(conf, pkg);
1001
1002 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1003           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1004
1005           opkg_message(conf, OPKG_INFO,
1006                        "  resolving conf files\n");
1007           resolve_conffiles(conf, pkg);
1008
1009           pkg->state_status = SS_UNPACKED;
1010           old_state_flag = pkg->state_flag;
1011           pkg->state_flag &= ~SF_PREFER;
1012           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1013
1014           if (old_pkg && !conf->force_reinstall) {
1015                old_pkg->state_status = SS_NOT_INSTALLED;
1016           }
1017
1018           time(&pkg->installed_time);
1019
1020           opkg_message(conf, OPKG_INFO,
1021                        "  cleanup temp files\n");
1022           cleanup_temporary_files(conf, pkg);
1023
1024           ab_pkg = pkg->parent;
1025           if (ab_pkg)
1026                ab_pkg->state_status = pkg->state_status;
1027
1028           opkg_message(conf, OPKG_INFO, "Done.\n");
1029
1030           if (use_signal)
1031                signal(SIGINT, old_handler);
1032           else
1033                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1034           pkg_vec_free (replacees);
1035           return 0;
1036
1037
1038      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1039           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1040      UNWIND_CHECK_DATA_FILE_CLASHES:
1041           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1042      UNWIND_BACKUP_MODIFIED_CONFFILES:
1043           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1044      UNWIND_PREINST_CONFIGURE:
1045           preinst_configure_unwind(conf, pkg, old_pkg);
1046      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1047           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1048      UNWIND_PRERM_UPGRADE_OLD_PKG:
1049           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1050      UNWIND_REMOVE_INSTALLED_REPLACEES:
1051           pkg_remove_installed_replacees_unwind(conf, replacees);
1052
1053           opkg_message(conf, OPKG_INFO,
1054                        "  cleanup temp files\n");
1055           cleanup_temporary_files(conf, pkg);
1056
1057           opkg_message(conf, OPKG_INFO,
1058                        "Failed.\n");
1059           if (use_signal)
1060                signal(SIGINT, old_handler);
1061           else
1062                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1063
1064           pkg_vec_free (replacees);
1065           return OPKG_ERR_UNKNOWN;
1066      }
1067      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1068 }
1069
1070 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1071 {
1072      /* DPKG_INCOMPATIBILITY:
1073         dpkg does some things here that we don't do yet. Do we care?
1074
1075         1. If a version of the package is already installed, call
1076            old-prerm upgrade new-version
1077         2. If the script runs but exits with a non-zero exit status
1078            new-prerm failed-upgrade old-version
1079            Error unwind, for both the above cases:
1080            old-postinst abort-upgrade new-version
1081      */
1082      return 0;
1083 }
1084
1085 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1086 {
1087      /* DPKG_INCOMPATIBILITY:
1088         dpkg does some things here that we don't do yet. Do we care?
1089         (See prerm_upgrade_old_package for details)
1090      */
1091      return 0;
1092 }
1093
1094 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1095 {
1096      /* DPKG_INCOMPATIBILITY:
1097         dpkg does some things here that we don't do yet. Do we care?
1098         2. If a 'conflicting' package is being removed at the same time:
1099                 1. If any packages depended on that conflicting package and
1100                    --auto-deconfigure is specified, call, for each such package:
1101                    deconfigured's-prerm deconfigure \
1102                    in-favour package-being-installed version \
1103                    removing conflicting-package version
1104                 Error unwind:
1105                    deconfigured's-postinst abort-deconfigure \
1106                    in-favour package-being-installed-but-failed version \
1107                    removing conflicting-package version
1108
1109                    The deconfigured packages are marked as requiring
1110                    configuration, so that if --install is used they will be
1111                    configured again if possible.
1112                 2. To prepare for removal of the conflicting package, call:
1113                    conflictor's-prerm remove in-favour package new-version
1114                 Error unwind:
1115                    conflictor's-postinst abort-remove in-favour package new-version
1116      */
1117      return 0;
1118 }
1119
1120 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1121 {
1122      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1123         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1124         details) */
1125      return 0;
1126 }
1127
1128 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1129 {
1130      int err;
1131      char *preinst_args;
1132
1133      if (old_pkg) {
1134           char *old_version = pkg_version_str_alloc(old_pkg);
1135           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1136           free(old_version);
1137      } else if (pkg->state_status == SS_CONFIG_FILES) {
1138           char *pkg_version = pkg_version_str_alloc(pkg);
1139           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1140           free(pkg_version);
1141      } else {
1142           preinst_args = strdup("install");
1143      }
1144
1145      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1146      if (err) {
1147           opkg_message(conf, OPKG_ERROR,
1148                        "Aborting installation of %s\n", pkg->name);
1149           return 1;
1150      }
1151
1152      free(preinst_args);
1153
1154      return 0;
1155 }
1156
1157 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1158 {
1159      /* DPKG_INCOMPATIBILITY:
1160         dpkg does the following error unwind, should we?
1161         pkg->postrm abort-upgrade old-version
1162         OR pkg->postrm abort-install old-version
1163         OR pkg->postrm abort-install
1164      */
1165      return 0;
1166 }
1167
1168 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1169 {
1170      int err;
1171      conffile_list_elt_t *iter;
1172      conffile_t *cf;
1173
1174      if (conf->noaction) return 0;
1175
1176      /* Backup all modified conffiles */
1177      if (old_pkg) {
1178           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1179                char *cf_name;
1180
1181                cf = iter->data;
1182                cf_name = root_filename_alloc(conf, cf->name);
1183
1184                /* Don't worry if the conffile is just plain gone */
1185                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1186                     err = backup_make_backup(conf, cf_name);
1187                     if (err) {
1188                          return err;
1189                     }
1190                }
1191                free(cf_name);
1192           }
1193      }
1194
1195      /* Backup all conffiles that were not conffiles in old_pkg */
1196      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1197           char *cf_name;
1198           cf = (conffile_t *)iter->data;
1199           cf_name = root_filename_alloc(conf, cf->name);
1200           /* Ignore if this was a conffile in old_pkg as well */
1201           if (pkg_get_conffile(old_pkg, cf->name)) {
1202                continue;
1203           }
1204
1205           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1206                err = backup_make_backup(conf, cf_name);
1207                if (err) {
1208                     return err;
1209                }
1210           }
1211           free(cf_name);
1212      }
1213
1214      return 0;
1215 }
1216
1217 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1218 {
1219      conffile_list_elt_t *iter;
1220
1221      if (old_pkg) {
1222           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1223                backup_remove(((nv_pair_t *)iter->data)->name);
1224           }
1225      }
1226
1227      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1228           backup_remove(((nv_pair_t *)iter->data)->name);
1229      }
1230
1231      return 0;
1232 }
1233
1234
1235 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1236 {
1237      /* DPKG_INCOMPATIBILITY:
1238         opkg takes a slightly different approach than dpkg at this
1239         point.  dpkg installs each file in the new package while
1240         creating a backup for any file that is replaced, (so that it
1241         can unwind if necessary).  To avoid complexity and redundant
1242         storage, opkg doesn't do any installation until later, (at the
1243         point at which dpkg removes the backups.
1244
1245         But, we do have to check for data file clashes, since after
1246         installing a package with a file clash, removing either of the
1247         packages involved in the clash has the potential to break the
1248         other package.
1249      */
1250      str_list_t *files_list;
1251      str_list_elt_t *iter, *niter;
1252
1253      int clashes = 0;
1254
1255      files_list = pkg_get_installed_files(pkg);
1256      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1257              iter;
1258              iter = niter, niter = str_list_next(files_list, iter)) {
1259           char *root_filename;
1260           char *filename = (char *) iter->data;
1261           root_filename = root_filename_alloc(conf, filename);
1262           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1263                pkg_t *owner;
1264                pkg_t *obs;
1265                /* Pre-existing conffiles are OK */
1266                /* @@@@ should have way to check that it is a conffile -Jamey */
1267                if (backup_exists_for(root_filename)) {
1268                     continue;
1269                }
1270
1271                /* Pre-existing files are OK if force-overwrite was asserted. */
1272                if (conf->force_overwrite) {
1273                     /* but we need to change who owns this file */
1274                     file_hash_set_file_owner(conf, filename, pkg);
1275                     continue;
1276                }
1277
1278                owner = file_hash_get_file_owner(conf, filename);
1279
1280                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1281                if (owner && old_pkg) {
1282                     if (strcmp(owner->name, old_pkg->name) == 0) {
1283                          continue;
1284                     }
1285                }
1286
1287                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1288                if (owner) {
1289                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1290                     if (pkg_replaces(pkg, owner)) {
1291                          continue;
1292                     }
1293 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1294    then it's ok to overwrite. */
1295                     if (strcmp(owner->name,pkg->name)==0){
1296                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1297                          continue;
1298                     }
1299                }
1300
1301                /* Pre-existing files are OK if they are obsolete */
1302                obs = hash_table_get(&conf->obs_file_hash, filename);
1303                if (obs) {
1304                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1305                     continue;
1306                }
1307
1308                /* We have found a clash. */
1309                opkg_message(conf, OPKG_ERROR,
1310                             "Package %s wants to install file %s\n"
1311                             "\tBut that file is already provided by package ",
1312                             pkg->name, filename);
1313                if (owner) {
1314                     opkg_message(conf, OPKG_ERROR,
1315                                  "%s\n", owner->name);
1316                } else {
1317                     opkg_message(conf, OPKG_ERROR,
1318                                  "<no package>\nPlease move this file out of the way and try again.\n");
1319                }
1320                clashes++;
1321           }
1322           free(root_filename);
1323      }
1324      pkg_free_installed_files(pkg);
1325
1326      return clashes;
1327 }
1328
1329 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1330 {
1331     /* Basically that's the worst hack I could do to be able to change ownership of
1332        file list, but, being that we have no way to unwind the mods, due to structure
1333        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1334        What we do here is change the ownership of file in hash if a replace ( or similar events
1335        happens )
1336        Only the action that are needed to change name should be considered.
1337        @@@ To change after 1.0 release.
1338      */
1339      str_list_t *files_list;
1340      str_list_elt_t *iter, *niter;
1341
1342      char *root_filename = NULL;
1343
1344      int clashes = 0;
1345
1346      files_list = pkg_get_installed_files(pkg);
1347      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1348              iter;
1349              iter = niter, niter = str_list_next(files_list, niter)) {
1350           char *filename = (char *) iter->data;
1351           if (root_filename) {
1352               free(root_filename);
1353               root_filename = NULL;
1354           }
1355           root_filename = root_filename_alloc(conf, filename);
1356           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1357                pkg_t *owner;
1358
1359                owner = file_hash_get_file_owner(conf, filename);
1360
1361                if (conf->force_overwrite) {
1362                     /* but we need to change who owns this file */
1363                     file_hash_set_file_owner(conf, filename, pkg);
1364                     continue;
1365                }
1366
1367
1368                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1369                if (owner) {
1370                     if (pkg_replaces(pkg, owner)) {
1371 /* It's now time to change the owner of that file.
1372    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1373                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1374                          file_hash_set_file_owner(conf, filename, pkg);
1375                          continue;
1376                     }
1377                }
1378
1379           }
1380      }
1381      if (root_filename) {
1382          free(root_filename);
1383          root_filename = NULL;
1384      }
1385      pkg_free_installed_files(pkg);
1386
1387      return clashes;
1388 }
1389
1390 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1391 {
1392      /* Nothing to do since check_data_file_clashes doesn't change state */
1393      return 0;
1394 }
1395
1396 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1397 {
1398      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1399         1. If the package is being upgraded, call
1400            old-postrm upgrade new-version
1401         2. If this fails, attempt:
1402            new-postrm failed-upgrade old-version
1403         Error unwind, for both cases:
1404            old-preinst abort-upgrade new-version    */
1405      return 0;
1406 }
1407
1408 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1409 {
1410      /* DPKG_INCOMPATIBILITY:
1411         dpkg does some things here that we don't do yet. Do we care?
1412         (See postrm_upgrade_old_pkg for details)
1413      */
1414     return 0;
1415 }
1416
1417 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1418 {
1419      int err;
1420      str_list_t *old_files;
1421      str_list_elt_t *of;
1422      str_list_t *new_files;
1423      str_list_elt_t *nf;
1424      hash_table_t new_files_table;
1425
1426      if (old_pkg == NULL) {
1427           return 0;
1428      }
1429
1430      old_files = pkg_get_installed_files(old_pkg);
1431      new_files = pkg_get_installed_files(pkg);
1432
1433      new_files_table.entries = NULL;
1434      hash_table_init("new_files" , &new_files_table, 20);
1435      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1436          if (nf && nf->data)
1437             hash_table_insert(&new_files_table, nf->data, nf->data);
1438      }
1439
1440      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1441           pkg_t *owner;
1442           char *old, *new;
1443           old = (char *)of->data;
1444           new = (char *) hash_table_get (&new_files_table, old);
1445           if (new)
1446                continue;
1447
1448           if (file_is_dir(old)) {
1449                continue;
1450           }
1451           owner = file_hash_get_file_owner(conf, old);
1452           if (owner != old_pkg) {
1453                /* in case obsolete file no longer belongs to old_pkg */
1454                continue;
1455           }
1456
1457           /* old file is obsolete */
1458           opkg_message(conf, OPKG_INFO,
1459                        "    removing obsolete file %s\n", old);
1460           if (!conf->noaction) {
1461                err = unlink(old);
1462                if (err) {
1463                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1464                                  strerror(errno));
1465                }
1466           }
1467      }
1468
1469      hash_table_deinit(&new_files_table);
1470      pkg_free_installed_files(old_pkg);
1471      pkg_free_installed_files(pkg);
1472
1473      return 0;
1474 }
1475
1476 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1477 {
1478      int i;
1479      int err = 0;
1480      char *globpattern;
1481      glob_t globbuf;
1482      if (0) {
1483           if (!pkg->dest) {
1484                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1485                return -1;
1486           }
1487           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1488           err = glob(globpattern, 0, NULL, &globbuf);
1489           free(globpattern);
1490           if (err) {
1491                return err;
1492           }
1493           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1494           for (i = 0; i < globbuf.gl_pathc; i++) {
1495                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1496                             globbuf.gl_pathv[i], old_pkg->name);
1497                if (!conf->noaction)
1498                     unlink(globbuf.gl_pathv[i]);
1499           }
1500           globfree(&globbuf);
1501      }
1502      return err;
1503 }
1504
1505 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1506 {
1507      int ret;
1508      char *prefix;
1509
1510      if (old_pkg)
1511           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1512      sprintf_alloc(&prefix, "%s.", pkg->name);
1513      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1514                                                         pkg->dest->info_dir,
1515                                                         prefix);
1516      free(prefix);
1517      return ret;
1518 }
1519
1520 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1521 {
1522      /* DPKG_INCOMPATIBILITY:
1523         This is a fairly sophisticated dpkg operation. Shall we
1524         skip it? */
1525
1526      /* Any packages all of whose files have been overwritten during the
1527         installation, and which aren't required for dependencies, are
1528         considered to have been removed. For each such package
1529         1. disappearer's-postrm disappear overwriter overwriter-version
1530         2. The package's maintainer scripts are removed
1531         3. It is noted in the status database as being in a sane state,
1532            namely not installed (any conffiles it may have are ignored,
1533            rather than being removed by dpkg). Note that disappearing
1534            packages do not have their prerm called, because dpkg doesn't
1535            know in advance that the package is going to vanish.
1536      */
1537      return 0;
1538 }
1539
1540 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1541 {
1542      int err;
1543
1544      /* opkg takes a slightly different approach to data file backups
1545         than dpkg. Rather than removing backups at this point, we
1546         actually do the data file installation now. See comments in
1547         check_data_file_clashes() for more details. */
1548
1549      opkg_message(conf, OPKG_INFO,
1550                   "    extracting data files to %s\n", pkg->dest->root_dir);
1551      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1552      if (err) {
1553           return err;
1554      }
1555
1556      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1557         so we can't save ourself from removing important packages
1558         At this point we (should) have extracted the .control file, so it
1559         would be a good idea to reload the data in it, and set the Essential
1560         state in *pkg. From now on the Essential is back in status file and
1561         we can protect again.
1562         We should operate this way:
1563         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1564         check for "Essential" in it
1565         set the value in pkg->essential.
1566         This new routine could be useful also for every other flag
1567         Pigi: 16/03/2004 */
1568      set_flags_from_control(conf, pkg) ;
1569
1570      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1571      err = pkg_write_filelist(conf, pkg);
1572      if (err)
1573           return err;
1574
1575      /* XXX: FEATURE: opkg should identify any files which existed
1576         before installation and which were overwritten, (see
1577         check_data_file_clashes()). What it must do is remove any such
1578         files from the filelist of the old package which provided the
1579         file. Otherwise, if the old package were removed at some point
1580         it would break the new package. Removing the new package will
1581         also break the old one, but this cannot be helped since the old
1582         package's file has already been deleted. This is the importance
1583         of check_data_file_clashes(), and only allowing opkg to install
1584         a clashing package with a user force. */
1585
1586      return 0;
1587 }
1588
1589 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1590 {
1591      conffile_list_elt_t *iter;
1592      conffile_t *cf;
1593      char *cf_backup;
1594
1595     char *md5sum;
1596
1597
1598      if (conf->noaction) return 0;
1599
1600      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1601           char *root_filename;
1602           cf = (conffile_t *)iter->data;
1603           root_filename = root_filename_alloc(conf, cf->name);
1604
1605           /* Might need to initialize the md5sum for each conffile */
1606           if (cf->value == NULL) {
1607                cf->value = file_md5sum_alloc(root_filename);
1608           }
1609
1610           if (!file_exists(root_filename)) {
1611                free(root_filename);
1612                continue;
1613           }
1614
1615           cf_backup = backup_filename_alloc(root_filename);
1616
1617
1618           if (file_exists(cf_backup)) {
1619               /* Let's compute md5 to test if files are changed */
1620               md5sum = file_md5sum_alloc(cf_backup);
1621               if (strcmp( cf->value,md5sum) != 0 ) {
1622                   if (conf->force_maintainer) {
1623                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1624                   } else if (conf->force_defaults
1625                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1626                       rename(cf_backup, root_filename);
1627                   }
1628               }
1629               unlink(cf_backup);
1630               free(md5sum);
1631           }
1632
1633           free(cf_backup);
1634           free(root_filename);
1635      }
1636
1637      return 0;
1638 }
1639
1640 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1641 {
1642      char *response;
1643      const char *short_file_name;
1644
1645      short_file_name = strrchr(file_name, '/');
1646      if (short_file_name) {
1647           short_file_name++;
1648      } else {
1649           short_file_name = file_name;
1650      }
1651
1652      while (1) {
1653           response = get_user_response("    Configuration file '%s'\n"
1654                                        "    ==> File on system created by you or by a script.\n"
1655                                        "    ==> File also in package provided by package maintainer.\n"
1656                                        "       What would you like to do about it ?  Your options are:\n"
1657                                        "        Y or I  : install the package maintainer's version\n"
1658                                        "        N or O  : keep your currently-installed version\n"
1659                                        "          D     : show the differences between the versions (if diff is installed)\n"
1660                                        "     The default action is to keep your current version.\n"
1661                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1662           if (strcmp(response, "y") == 0
1663               || strcmp(response, "i") == 0
1664               || strcmp(response, "yes") == 0) {
1665                free(response);
1666                return 0;
1667           }
1668
1669           if (strcmp(response, "d") == 0) {
1670                char *cmd;
1671
1672                free(response);
1673                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1674                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1675                xsystem(cmd);
1676                free(cmd);
1677                printf("    [Press ENTER to continue]\n");
1678                response = file_read_line_alloc(stdin);
1679                free(response);
1680                continue;
1681           }
1682
1683           free(response);
1684           return 1;
1685      }
1686 }
1687
1688 /* XXX: CLEANUP: I'd like to move all of the code for
1689    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1690    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1691    pkg_deinit for example). */
1692 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1693 {
1694      DIR *tmp_dir;
1695      struct dirent *dirent;
1696      char *tmp_file;
1697
1698 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1699 #error
1700      opkg_message(conf, OPKG_DEBUG,
1701                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1702                   __FUNCTION__, pkg->tmp_unpack_dir);
1703      return 0;
1704 #endif
1705
1706      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1707           tmp_dir = opendir(pkg->tmp_unpack_dir);
1708           if (tmp_dir) {
1709                while (1) {
1710                     dirent = readdir(tmp_dir);
1711                     if (dirent == NULL) {
1712                          break;
1713                     }
1714                     sprintf_alloc(&tmp_file, "%s/%s",
1715                                   pkg->tmp_unpack_dir, dirent->d_name);
1716                     if (! file_is_dir(tmp_file)) {
1717                          unlink(tmp_file);
1718                     }
1719                     free(tmp_file);
1720                }
1721                closedir(tmp_dir);
1722                rmdir(pkg->tmp_unpack_dir);
1723                free(pkg->tmp_unpack_dir);
1724                pkg->tmp_unpack_dir = NULL;
1725           }
1726      }
1727
1728      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1729                   pkg->name, pkg->local_filename, conf->tmp_dir);
1730      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1731           unlink(pkg->local_filename);
1732           free(pkg->local_filename);
1733           pkg->local_filename = NULL;
1734      }
1735
1736      return 0;
1737 }
1738
1739 static char *backup_filename_alloc(const char *file_name)
1740 {
1741      char *backup;
1742
1743      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1744
1745      return backup;
1746 }
1747
1748 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1749 {
1750      int err;
1751      char *backup;
1752
1753      backup = backup_filename_alloc(file_name);
1754      err = file_copy(file_name, backup);
1755      if (err) {
1756           opkg_message(conf, OPKG_ERROR,
1757                        "%s: Failed to copy %s to %s\n",
1758                        __FUNCTION__, file_name, backup);
1759      }
1760
1761      free(backup);
1762
1763      return err;
1764 }
1765
1766 static int backup_exists_for(const char *file_name)
1767 {
1768      int ret;
1769      char *backup;
1770
1771      backup = backup_filename_alloc(file_name);
1772
1773      ret = file_exists(backup);
1774
1775      free(backup);
1776
1777      return ret;
1778 }
1779
1780 static int backup_remove(const char *file_name)
1781 {
1782      char *backup;
1783
1784      backup = backup_filename_alloc(file_name);
1785      unlink(backup);
1786      free(backup);
1787
1788      return 0;
1789 }
1790