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_cmd.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
 771      if ( from_upgrade )
 772         message = 1;            /* Coming from an upgrade, and should change the output message */
 773
 774      if (!pkg) {
 775           opkg_message(conf, OPKG_ERROR,
 776                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 777           return OPKG_INSTALL_ERR_INTERNAL;
 778      }
 779
 780      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 781
 782      if (!pkg_arch_supported(conf, pkg)) {
 783           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 784                        pkg->architecture, pkg->name);
 785           return OPKG_INSTALL_ERR_INTERNAL;
 786      }
 787      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 788           err = satisfy_dependencies_for(conf, pkg);
 789           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 790
 791           opkg_message(conf, OPKG_NOTICE,
 792                        "Package %s is already installed in %s.\n",
 793                        pkg->name, pkg->dest->name);
 794           return 0;
 795      }
 796
 797      if (pkg->dest == NULL) {
 798           pkg->dest = conf->default_dest;
 799      }
 800
 801      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 802
 803      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 804      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 805
 806      pkg->state_want = SW_INSTALL;
 807      if (old_pkg){
 808          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 809      }
 810
 811
 812      /* Abhaya: conflicts check */
 813      err = check_conflicts_for(conf, pkg);
 814      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 815
 816      /* this setup is to remove the upgrade scenario in the end when
 817         installing pkg A, A deps B & B deps on A. So both B and A are
 818         installed. Then A's installation is started resulting in an
 819         uncecessary upgrade */
 820      if (pkg->state_status == SS_INSTALLED
 821          && conf->force_reinstall == 0) return 0;
 822
 823      err = verify_pkg_installable(conf, pkg);
 824      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 825
 826      if (pkg->local_filename == NULL) {
 827           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 828           if (err) {
 829                opkg_message(conf, OPKG_ERROR,
 830                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 831                             pkg->name);
 832                return OPKG_INSTALL_ERR_DOWNLOAD;
 833           }
 834      }
 835
 836      /* check that the repository is valid */
 837      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 838      char *list_file_name, *sig_file_name, *lists_dir;
 839
 840      /* check to ensure the package has come from a repository */
 841      if (conf->check_signature && pkg->src)
 842      {
 843        sprintf_alloc (&lists_dir, "%s",
 844                      (conf->restrict_to_default_dest)
 845                       ? conf->default_dest->lists_dir
 846                       : conf->lists_dir);
 847        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 848        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 849
 850        if (file_exists (sig_file_name))
 851        {
 852          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
 853            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 854                            list_file_name);
 855            return OPKG_INSTALL_ERR_SIGNATURE;
 856          }
 857        }else{
 858          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 859                          "Perhaps you need to run 'opkg update'?\n");
 860          return OPKG_INSTALL_ERR_SIGNATURE;
 861        }
 862
 863        free (lists_dir);
 864        free (list_file_name);
 865        free (sig_file_name);
 866      }
 867      #endif
 868
 869      /* Check for md5 values */
 870      if (pkg->md5sum)
 871      {
 872          file_md5 = file_md5sum_alloc(pkg->local_filename);
 873          if (strcmp(file_md5, pkg->md5sum))
 874          {
 875               opkg_message(conf, OPKG_ERROR,
 876                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 877                            pkg->name);
 878               free(file_md5);
 879               return OPKG_INSTALL_ERR_MD5;
 880          }
 881          free(file_md5);
 882      }
 883
 884 #ifdef HAVE_SHA256
 885      /* Check for sha256 value */
 886      if(pkg->sha256sum)
 887      {
 888          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 889          if (strcmp(file_sha256, pkg->sha256sum))
 890          {
 891               opkg_message(conf, OPKG_ERROR,
 892                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 893                            pkg->name);
 894               free(file_sha256);
 895               return OPKG_INSTALL_ERR_SHA256;
 896          }
 897          free(file_sha256);
 898      }
 899 #endif
 900
 901      if (pkg->tmp_unpack_dir == NULL) {
 902           unpack_pkg_control_files(conf, pkg);
 903      }
 904
 905      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 906 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 907 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 908      err = update_file_ownership(conf, pkg, old_pkg);
 909      if (err) { return OPKG_ERR_UNKNOWN; }
 910
 911      if (conf->nodeps == 0) {
 912           err = satisfy_dependencies_for(conf, pkg);
 913           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 914      }
 915
 916      replacees = pkg_vec_alloc();
 917      pkg_get_installed_replacees(conf, pkg, replacees);
 918
 919      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 920      {
 921           sigset_t newset, oldset;
 922           sighandler_t old_handler = NULL;
 923           int use_signal = 0;
 924           caught_sigint = 0;
 925           if (use_signal) {
 926                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 927           } else {
 928                sigemptyset(&newset);
 929                sigaddset(&newset, SIGINT);
 930                sigprocmask(SIG_BLOCK, &newset, &oldset);
 931           }
 932
 933           opkg_state_changed++;
 934           pkg->state_flag |= SF_FILELIST_CHANGED;
 935
 936           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 937
 938           /* XXX: BUG: we really should treat replacement more like an upgrade
 939            *      Instead, we're going to remove the replacees
 940            */
 941           err = pkg_remove_installed_replacees(conf, replacees);
 942           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 943
 944           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 945           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 946
 947           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 948           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 949
 950           err = preinst_configure(conf, pkg, old_pkg);
 951           if (err) goto UNWIND_PREINST_CONFIGURE;
 952
 953           err = backup_modified_conffiles(conf, pkg, old_pkg);
 954           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 955
 956           err = check_data_file_clashes(conf, pkg, old_pkg);
 957           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 958
 959           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 960           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 961
 962           if (conf->noaction) return 0;
 963
 964           /* point of no return: no unwinding after this */
 965           if (old_pkg && !conf->force_reinstall) {
 966                old_pkg->state_want = SW_DEINSTALL;
 967
 968                if (old_pkg->state_flag & SF_NOPRUNE) {
 969                     opkg_message(conf, OPKG_INFO,
 970                                  "  not removing obsolesced files because package marked noprune\n");
 971                } else {
 972                     opkg_message(conf, OPKG_INFO,
 973                                  "  removing obsolesced files\n");
 974                     remove_obsolesced_files(conf, pkg, old_pkg);
 975                }
 976                /* removing files from old package, to avoid ghost files */
 977                remove_data_files_and_list(conf, old_pkg);
 978 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 979                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 980                remove_postrm(conf, old_pkg);
 981 /* Pigi */
 982
 983           }
 984
 985
 986           opkg_message(conf, OPKG_INFO,
 987                        "  installing maintainer scripts\n");
 988           install_maintainer_scripts(conf, pkg, old_pkg);
 989
 990           /* the following just returns 0 */
 991           remove_disappeared(conf, pkg);
 992
 993           opkg_message(conf, OPKG_INFO,
 994                        "  installing data files\n");
 995           install_data_files(conf, pkg);
 996
 997 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 998           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 999
1000           opkg_message(conf, OPKG_INFO,
1001                        "  resolving conf files\n");
1002           resolve_conffiles(conf, pkg);
1003
1004           pkg->state_status = SS_UNPACKED;
1005           old_state_flag = pkg->state_flag;
1006           pkg->state_flag &= ~SF_PREFER;
1007           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1008
1009           if (old_pkg && !conf->force_reinstall) {
1010                old_pkg->state_status = SS_NOT_INSTALLED;
1011           }
1012
1013           time(&pkg->installed_time);
1014
1015           opkg_message(conf, OPKG_INFO,
1016                        "  cleanup temp files\n");
1017           cleanup_temporary_files(conf, pkg);
1018
1019           ab_pkg = pkg->parent;
1020           if (ab_pkg)
1021                ab_pkg->state_status = pkg->state_status;
1022
1023           opkg_message(conf, OPKG_INFO, "Done.\n");
1024
1025           if (use_signal)
1026                signal(SIGINT, old_handler);
1027           else
1028                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1029           pkg_vec_free (replacees);
1030           return 0;
1031
1032
1033      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1034           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1035      UNWIND_CHECK_DATA_FILE_CLASHES:
1036           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1037      UNWIND_BACKUP_MODIFIED_CONFFILES:
1038           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1039      UNWIND_PREINST_CONFIGURE:
1040           preinst_configure_unwind(conf, pkg, old_pkg);
1041      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1042           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1043      UNWIND_PRERM_UPGRADE_OLD_PKG:
1044           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1045      UNWIND_REMOVE_INSTALLED_REPLACEES:
1046           pkg_remove_installed_replacees_unwind(conf, replacees);
1047
1048           opkg_message(conf, OPKG_INFO,
1049                        "  cleanup temp files\n");
1050           cleanup_temporary_files(conf, pkg);
1051
1052           opkg_message(conf, OPKG_INFO,
1053                        "Failed.\n");
1054           if (use_signal)
1055                signal(SIGINT, old_handler);
1056           else
1057                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1058
1059           pkg_vec_free (replacees);
1060           return OPKG_ERR_UNKNOWN;
1061      }
1062 }
1063
1064 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1065 {
1066      /* DPKG_INCOMPATIBILITY:
1067         dpkg does some things here that we don't do yet. Do we care?
1068
1069         1. If a version of the package is already installed, call
1070            old-prerm upgrade new-version
1071         2. If the script runs but exits with a non-zero exit status
1072            new-prerm failed-upgrade old-version
1073            Error unwind, for both the above cases:
1074            old-postinst abort-upgrade new-version
1075      */
1076      return 0;
1077 }
1078
1079 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1080 {
1081      /* DPKG_INCOMPATIBILITY:
1082         dpkg does some things here that we don't do yet. Do we care?
1083         (See prerm_upgrade_old_package for details)
1084      */
1085      return 0;
1086 }
1087
1088 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1089 {
1090      /* DPKG_INCOMPATIBILITY:
1091         dpkg does some things here that we don't do yet. Do we care?
1092         2. If a 'conflicting' package is being removed at the same time:
1093                 1. If any packages depended on that conflicting package and
1094                    --auto-deconfigure is specified, call, for each such package:
1095                    deconfigured's-prerm deconfigure \
1096                    in-favour package-being-installed version \
1097                    removing conflicting-package version
1098                 Error unwind:
1099                    deconfigured's-postinst abort-deconfigure \
1100                    in-favour package-being-installed-but-failed version \
1101                    removing conflicting-package version
1102
1103                    The deconfigured packages are marked as requiring
1104                    configuration, so that if --install is used they will be
1105                    configured again if possible.
1106                 2. To prepare for removal of the conflicting package, call:
1107                    conflictor's-prerm remove in-favour package new-version
1108                 Error unwind:
1109                    conflictor's-postinst abort-remove in-favour package new-version
1110      */
1111      return 0;
1112 }
1113
1114 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1115 {
1116      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1117         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1118         details) */
1119      return 0;
1120 }
1121
1122 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1123 {
1124      int err;
1125      char *preinst_args;
1126
1127      if (old_pkg) {
1128           char *old_version = pkg_version_str_alloc(old_pkg);
1129           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1130           free(old_version);
1131      } else if (pkg->state_status == SS_CONFIG_FILES) {
1132           char *pkg_version = pkg_version_str_alloc(pkg);
1133           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1134           free(pkg_version);
1135      } else {
1136           preinst_args = strdup("install");
1137      }
1138
1139      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1140      if (err) {
1141           opkg_message(conf, OPKG_ERROR,
1142                        "Aborting installation of %s\n", pkg->name);
1143           return 1;
1144      }
1145
1146      free(preinst_args);
1147
1148      return 0;
1149 }
1150
1151 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1152 {
1153      /* DPKG_INCOMPATIBILITY:
1154         dpkg does the following error unwind, should we?
1155         pkg->postrm abort-upgrade old-version
1156         OR pkg->postrm abort-install old-version
1157         OR pkg->postrm abort-install
1158      */
1159      return 0;
1160 }
1161
1162 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1163 {
1164      int err;
1165      conffile_list_elt_t *iter;
1166      conffile_t *cf;
1167
1168      if (conf->noaction) return 0;
1169
1170      /* Backup all modified conffiles */
1171      if (old_pkg) {
1172           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1173                char *cf_name;
1174
1175                cf = iter->data;
1176                cf_name = root_filename_alloc(conf, cf->name);
1177
1178                /* Don't worry if the conffile is just plain gone */
1179                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1180                     err = backup_make_backup(conf, cf_name);
1181                     if (err) {
1182                          return err;
1183                     }
1184                }
1185                free(cf_name);
1186           }
1187      }
1188
1189      /* Backup all conffiles that were not conffiles in old_pkg */
1190      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1191           char *cf_name;
1192           cf = (conffile_t *)iter->data;
1193           cf_name = root_filename_alloc(conf, cf->name);
1194           /* Ignore if this was a conffile in old_pkg as well */
1195           if (pkg_get_conffile(old_pkg, cf->name)) {
1196                continue;
1197           }
1198
1199           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1200                err = backup_make_backup(conf, cf_name);
1201                if (err) {
1202                     return err;
1203                }
1204           }
1205           free(cf_name);
1206      }
1207
1208      return 0;
1209 }
1210
1211 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1212 {
1213      conffile_list_elt_t *iter;
1214
1215      if (old_pkg) {
1216           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1217                backup_remove(((nv_pair_t *)iter->data)->name);
1218           }
1219      }
1220
1221      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1222           backup_remove(((nv_pair_t *)iter->data)->name);
1223      }
1224
1225      return 0;
1226 }
1227
1228
1229 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1230 {
1231      /* DPKG_INCOMPATIBILITY:
1232         opkg takes a slightly different approach than dpkg at this
1233         point.  dpkg installs each file in the new package while
1234         creating a backup for any file that is replaced, (so that it
1235         can unwind if necessary).  To avoid complexity and redundant
1236         storage, opkg doesn't do any installation until later, (at the
1237         point at which dpkg removes the backups.
1238
1239         But, we do have to check for data file clashes, since after
1240         installing a package with a file clash, removing either of the
1241         packages involved in the clash has the potential to break the
1242         other package.
1243      */
1244      str_list_t *files_list;
1245      str_list_elt_t *iter, *niter;
1246
1247      int clashes = 0;
1248
1249      files_list = pkg_get_installed_files(pkg);
1250      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1251              iter;
1252              iter = niter, niter = str_list_next(files_list, iter)) {
1253           char *root_filename;
1254           char *filename = (char *) iter->data;
1255           root_filename = root_filename_alloc(conf, filename);
1256           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1257                pkg_t *owner;
1258                pkg_t *obs;
1259                /* Pre-existing conffiles are OK */
1260                /* @@@@ should have way to check that it is a conffile -Jamey */
1261                if (backup_exists_for(root_filename)) {
1262                     continue;
1263                }
1264
1265                /* Pre-existing files are OK if force-overwrite was asserted. */
1266                if (conf->force_overwrite) {
1267                     /* but we need to change who owns this file */
1268                     file_hash_set_file_owner(conf, filename, pkg);
1269                     continue;
1270                }
1271
1272                owner = file_hash_get_file_owner(conf, filename);
1273
1274                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1275                if (owner && old_pkg) {
1276                     if (strcmp(owner->name, old_pkg->name) == 0) {
1277                          continue;
1278                     }
1279                }
1280
1281                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1282                if (owner) {
1283                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1284                     if (pkg_replaces(pkg, owner)) {
1285                          continue;
1286                     }
1287 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1288    then it's ok to overwrite. */
1289                     if (strcmp(owner->name,pkg->name)==0){
1290                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1291                          continue;
1292                     }
1293                }
1294
1295                /* Pre-existing files are OK if they are obsolete */
1296                obs = hash_table_get(&conf->obs_file_hash, filename);
1297                if (obs) {
1298                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1299                     continue;
1300                }
1301
1302                /* We have found a clash. */
1303                opkg_message(conf, OPKG_ERROR,
1304                             "Package %s wants to install file %s\n"
1305                             "\tBut that file is already provided by package ",
1306                             pkg->name, filename);
1307                if (owner) {
1308                     opkg_message(conf, OPKG_ERROR,
1309                                  "%s\n", owner->name);
1310                } else {
1311                     opkg_message(conf, OPKG_ERROR,
1312                                  "<no package>\nPlease move this file out of the way and try again.\n");
1313                }
1314                clashes++;
1315           }
1316           free(root_filename);
1317      }
1318      pkg_free_installed_files(pkg);
1319
1320      return clashes;
1321 }
1322
1323 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1324 {
1325     /* Basically that's the worst hack I could do to be able to change ownership of
1326        file list, but, being that we have no way to unwind the mods, due to structure
1327        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1328        What we do here is change the ownership of file in hash if a replace ( or similar events
1329        happens )
1330        Only the action that are needed to change name should be considered.
1331        @@@ To change after 1.0 release.
1332      */
1333      str_list_t *files_list;
1334      str_list_elt_t *iter, *niter;
1335
1336      char *root_filename = NULL;
1337
1338      int clashes = 0;
1339
1340      files_list = pkg_get_installed_files(pkg);
1341      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1342              iter;
1343              iter = niter, niter = str_list_next(files_list, niter)) {
1344           char *filename = (char *) iter->data;
1345           if (root_filename) {
1346               free(root_filename);
1347               root_filename = NULL;
1348           }
1349           root_filename = root_filename_alloc(conf, filename);
1350           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1351                pkg_t *owner;
1352
1353                owner = file_hash_get_file_owner(conf, filename);
1354
1355                if (conf->force_overwrite) {
1356                     /* but we need to change who owns this file */
1357                     file_hash_set_file_owner(conf, filename, pkg);
1358                     continue;
1359                }
1360
1361
1362                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1363                if (owner) {
1364                     if (pkg_replaces(pkg, owner)) {
1365 /* It's now time to change the owner of that file.
1366    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1367                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1368                          file_hash_set_file_owner(conf, filename, pkg);
1369                          continue;
1370                     }
1371                }
1372
1373           }
1374      }
1375      if (root_filename) {
1376          free(root_filename);
1377          root_filename = NULL;
1378      }
1379      pkg_free_installed_files(pkg);
1380
1381      return clashes;
1382 }
1383
1384 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1385 {
1386      /* Nothing to do since check_data_file_clashes doesn't change state */
1387      return 0;
1388 }
1389
1390 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1391 {
1392      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1393         1. If the package is being upgraded, call
1394            old-postrm upgrade new-version
1395         2. If this fails, attempt:
1396            new-postrm failed-upgrade old-version
1397         Error unwind, for both cases:
1398            old-preinst abort-upgrade new-version    */
1399      return 0;
1400 }
1401
1402 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1403 {
1404      /* DPKG_INCOMPATIBILITY:
1405         dpkg does some things here that we don't do yet. Do we care?
1406         (See postrm_upgrade_old_pkg for details)
1407      */
1408     return 0;
1409 }
1410
1411 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1412 {
1413      int err;
1414      str_list_t *old_files;
1415      str_list_elt_t *of;
1416      str_list_t *new_files;
1417      str_list_elt_t *nf;
1418      hash_table_t new_files_table;
1419
1420      if (old_pkg == NULL) {
1421           return 0;
1422      }
1423
1424      old_files = pkg_get_installed_files(old_pkg);
1425      new_files = pkg_get_installed_files(pkg);
1426
1427      new_files_table.entries = NULL;
1428      hash_table_init("new_files" , &new_files_table, 20);
1429      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1430          if (nf && nf->data)
1431             hash_table_insert(&new_files_table, nf->data, nf->data);
1432      }
1433
1434      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1435           pkg_t *owner;
1436           char *old, *new;
1437           old = (char *)of->data;
1438           new = (char *) hash_table_get (&new_files_table, old);
1439           if (new)
1440                continue;
1441
1442           if (file_is_dir(old)) {
1443                continue;
1444           }
1445           owner = file_hash_get_file_owner(conf, old);
1446           if (owner != old_pkg) {
1447                /* in case obsolete file no longer belongs to old_pkg */
1448                continue;
1449           }
1450
1451           /* old file is obsolete */
1452           opkg_message(conf, OPKG_INFO,
1453                        "    removing obsolete file %s\n", old);
1454           if (!conf->noaction) {
1455                err = unlink(old);
1456                if (err) {
1457                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1458                                  strerror(errno));
1459                }
1460           }
1461      }
1462
1463      hash_table_deinit(&new_files_table);
1464      pkg_free_installed_files(old_pkg);
1465      pkg_free_installed_files(pkg);
1466
1467      return 0;
1468 }
1469
1470 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1471 {
1472      int i;
1473      int err = 0;
1474      char *globpattern;
1475      glob_t globbuf;
1476      if (0) {
1477           if (!pkg->dest) {
1478                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1479                return -1;
1480           }
1481           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1482           err = glob(globpattern, 0, NULL, &globbuf);
1483           free(globpattern);
1484           if (err) {
1485                return err;
1486           }
1487           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1488           for (i = 0; i < globbuf.gl_pathc; i++) {
1489                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1490                             globbuf.gl_pathv[i], old_pkg->name);
1491                if (!conf->noaction)
1492                     unlink(globbuf.gl_pathv[i]);
1493           }
1494           globfree(&globbuf);
1495      }
1496      return err;
1497 }
1498
1499 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1500 {
1501      int ret;
1502      char *prefix;
1503
1504      if (old_pkg)
1505           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1506      sprintf_alloc(&prefix, "%s.", pkg->name);
1507      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1508                                                         pkg->dest->info_dir,
1509                                                         prefix);
1510      free(prefix);
1511      return ret;
1512 }
1513
1514 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1515 {
1516      /* DPKG_INCOMPATIBILITY:
1517         This is a fairly sophisticated dpkg operation. Shall we
1518         skip it? */
1519
1520      /* Any packages all of whose files have been overwritten during the
1521         installation, and which aren't required for dependencies, are
1522         considered to have been removed. For each such package
1523         1. disappearer's-postrm disappear overwriter overwriter-version
1524         2. The package's maintainer scripts are removed
1525         3. It is noted in the status database as being in a sane state,
1526            namely not installed (any conffiles it may have are ignored,
1527            rather than being removed by dpkg). Note that disappearing
1528            packages do not have their prerm called, because dpkg doesn't
1529            know in advance that the package is going to vanish.
1530      */
1531      return 0;
1532 }
1533
1534 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1535 {
1536      int err;
1537
1538      /* opkg takes a slightly different approach to data file backups
1539         than dpkg. Rather than removing backups at this point, we
1540         actually do the data file installation now. See comments in
1541         check_data_file_clashes() for more details. */
1542
1543      opkg_message(conf, OPKG_INFO,
1544                   "    extracting data files to %s\n", pkg->dest->root_dir);
1545      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1546      if (err) {
1547           return err;
1548      }
1549
1550      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1551         so we can't save ourself from removing important packages
1552         At this point we (should) have extracted the .control file, so it
1553         would be a good idea to reload the data in it, and set the Essential
1554         state in *pkg. From now on the Essential is back in status file and
1555         we can protect again.
1556         We should operate this way:
1557         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1558         check for "Essential" in it
1559         set the value in pkg->essential.
1560         This new routine could be useful also for every other flag
1561         Pigi: 16/03/2004 */
1562      set_flags_from_control(conf, pkg) ;
1563
1564      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1565      err = pkg_write_filelist(conf, pkg);
1566      if (err)
1567           return err;
1568
1569      /* XXX: FEATURE: opkg should identify any files which existed
1570         before installation and which were overwritten, (see
1571         check_data_file_clashes()). What it must do is remove any such
1572         files from the filelist of the old package which provided the
1573         file. Otherwise, if the old package were removed at some point
1574         it would break the new package. Removing the new package will
1575         also break the old one, but this cannot be helped since the old
1576         package's file has already been deleted. This is the importance
1577         of check_data_file_clashes(), and only allowing opkg to install
1578         a clashing package with a user force. */
1579
1580      return 0;
1581 }
1582
1583 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1584 {
1585      conffile_list_elt_t *iter;
1586      conffile_t *cf;
1587      char *cf_backup;
1588
1589     char *md5sum;
1590
1591
1592      if (conf->noaction) return 0;
1593
1594      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1595           char *root_filename;
1596           cf = (conffile_t *)iter->data;
1597           root_filename = root_filename_alloc(conf, cf->name);
1598
1599           /* Might need to initialize the md5sum for each conffile */
1600           if (cf->value == NULL) {
1601                cf->value = file_md5sum_alloc(root_filename);
1602           }
1603
1604           if (!file_exists(root_filename)) {
1605                free(root_filename);
1606                continue;
1607           }
1608
1609           cf_backup = backup_filename_alloc(root_filename);
1610
1611
1612           if (file_exists(cf_backup)) {
1613               /* Let's compute md5 to test if files are changed */
1614               md5sum = file_md5sum_alloc(cf_backup);
1615               if (strcmp( cf->value,md5sum) != 0 ) {
1616                   if (conf->force_maintainer) {
1617                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1618                   } else if (conf->force_defaults
1619                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1620                       rename(cf_backup, root_filename);
1621                   }
1622               }
1623               unlink(cf_backup);
1624               free(md5sum);
1625           }
1626
1627           free(cf_backup);
1628           free(root_filename);
1629      }
1630
1631      return 0;
1632 }
1633
1634 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1635 {
1636      char *response;
1637      const char *short_file_name;
1638
1639      short_file_name = strrchr(file_name, '/');
1640      if (short_file_name) {
1641           short_file_name++;
1642      } else {
1643           short_file_name = file_name;
1644      }
1645
1646      while (1) {
1647           response = get_user_response("    Configuration file '%s'\n"
1648                                        "    ==> File on system created by you or by a script.\n"
1649                                        "    ==> File also in package provided by package maintainer.\n"
1650                                        "       What would you like to do about it ?  Your options are:\n"
1651                                        "        Y or I  : install the package maintainer's version\n"
1652                                        "        N or O  : keep your currently-installed version\n"
1653                                        "          D     : show the differences between the versions (if diff is installed)\n"
1654                                        "     The default action is to keep your current version.\n"
1655                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1656           if (strcmp(response, "y") == 0
1657               || strcmp(response, "i") == 0
1658               || strcmp(response, "yes") == 0) {
1659                free(response);
1660                return 0;
1661           }
1662
1663           if (strcmp(response, "d") == 0) {
1664                char *cmd;
1665
1666                free(response);
1667                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1668                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1669                xsystem(cmd);
1670                free(cmd);
1671                printf("    [Press ENTER to continue]\n");
1672                response = file_read_line_alloc(stdin);
1673                free(response);
1674                continue;
1675           }
1676
1677           free(response);
1678           return 1;
1679      }
1680 }
1681
1682 /* XXX: CLEANUP: I'd like to move all of the code for
1683    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1684    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1685    pkg_deinit for example). */
1686 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1687 {
1688      DIR *tmp_dir;
1689      struct dirent *dirent;
1690      char *tmp_file;
1691
1692 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1693 #error
1694      opkg_message(conf, OPKG_DEBUG,
1695                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1696                   __FUNCTION__, pkg->tmp_unpack_dir);
1697      return 0;
1698 #endif
1699
1700      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1701           tmp_dir = opendir(pkg->tmp_unpack_dir);
1702           if (tmp_dir) {
1703                while (1) {
1704                     dirent = readdir(tmp_dir);
1705                     if (dirent == NULL) {
1706                          break;
1707                     }
1708                     sprintf_alloc(&tmp_file, "%s/%s",
1709                                   pkg->tmp_unpack_dir, dirent->d_name);
1710                     if (! file_is_dir(tmp_file)) {
1711                          unlink(tmp_file);
1712                     }
1713                     free(tmp_file);
1714                }
1715                closedir(tmp_dir);
1716                rmdir(pkg->tmp_unpack_dir);
1717                free(pkg->tmp_unpack_dir);
1718                pkg->tmp_unpack_dir = NULL;
1719           }
1720      }
1721
1722      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1723                   pkg->name, pkg->local_filename, conf->tmp_dir);
1724      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1725           unlink(pkg->local_filename);
1726           free(pkg->local_filename);
1727           pkg->local_filename = NULL;
1728      }
1729
1730      return 0;
1731 }
1732
1733 static char *backup_filename_alloc(const char *file_name)
1734 {
1735      char *backup;
1736
1737      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1738
1739      return backup;
1740 }
1741
1742 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1743 {
1744      int err;
1745      char *backup;
1746
1747      backup = backup_filename_alloc(file_name);
1748      err = file_copy(file_name, backup);
1749      if (err) {
1750           opkg_message(conf, OPKG_ERROR,
1751                        "%s: Failed to copy %s to %s\n",
1752                        __FUNCTION__, file_name, backup);
1753      }
1754
1755      free(backup);
1756
1757      return err;
1758 }
1759
1760 static int backup_exists_for(const char *file_name)
1761 {
1762      int ret;
1763      char *backup;
1764
1765      backup = backup_filename_alloc(file_name);
1766
1767      ret = file_exists(backup);
1768
1769      free(backup);
1770
1771      return ret;
1772 }
1773
1774 static int backup_remove(const char *file_name)
1775 {
1776      char *backup;
1777
1778      backup = backup_filename_alloc(file_name);
1779      unlink(backup);
1780      free(backup);
1781
1782      return 0;
1783 }
1784