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