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
 585     if (!old_pkg)
 586         return 0;
 587
 588     if (old_pkg->depends_count == 0)
 589         return 0;
 590
 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 = xcalloc(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 = xrealloc (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 (file_md5 && 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          if (file_md5)
 882               free(file_md5);
 883      }
 884
 885 #ifdef HAVE_SHA256
 886      /* Check for sha256 value */
 887      if(pkg->sha256sum)
 888      {
 889          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 890          if (file_sha256 && strcmp(file_sha256, pkg->sha256sum))
 891          {
 892               opkg_message(conf, OPKG_ERROR,
 893                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 894                            pkg->name);
 895               free(file_sha256);
 896               return OPKG_INSTALL_ERR_SHA256;
 897          }
 898          if (file_sha256)
 899               free(file_sha256);
 900      }
 901 #endif
 902
 903      if (pkg->tmp_unpack_dir == NULL) {
 904           unpack_pkg_control_files(conf, pkg);
 905      }
 906
 907      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 908 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 909 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 910      err = update_file_ownership(conf, pkg, old_pkg);
 911      if (err) { return OPKG_ERR_UNKNOWN; }
 912
 913      if (conf->nodeps == 0) {
 914           err = satisfy_dependencies_for(conf, pkg);
 915           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 916      }
 917
 918      replacees = pkg_vec_alloc();
 919      pkg_get_installed_replacees(conf, pkg, replacees);
 920
 921      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 922      {
 923           sigset_t newset, oldset;
 924           sighandler_t old_handler = NULL;
 925           int use_signal = 0;
 926           caught_sigint = 0;
 927           if (use_signal) {
 928                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 929           } else {
 930                sigemptyset(&newset);
 931                sigaddset(&newset, SIGINT);
 932                sigprocmask(SIG_BLOCK, &newset, &oldset);
 933           }
 934
 935           opkg_state_changed++;
 936           pkg->state_flag |= SF_FILELIST_CHANGED;
 937
 938           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 939
 940           /* XXX: BUG: we really should treat replacement more like an upgrade
 941            *      Instead, we're going to remove the replacees
 942            */
 943           err = pkg_remove_installed_replacees(conf, replacees);
 944           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 945
 946           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 947           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 948
 949           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 950           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 951
 952           err = preinst_configure(conf, pkg, old_pkg);
 953           if (err) goto UNWIND_PREINST_CONFIGURE;
 954
 955           err = backup_modified_conffiles(conf, pkg, old_pkg);
 956           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 957
 958           err = check_data_file_clashes(conf, pkg, old_pkg);
 959           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 960
 961           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 962           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 963
 964           if (conf->noaction) return 0;
 965
 966           /* point of no return: no unwinding after this */
 967           if (old_pkg && !conf->force_reinstall) {
 968                old_pkg->state_want = SW_DEINSTALL;
 969
 970                if (old_pkg->state_flag & SF_NOPRUNE) {
 971                     opkg_message(conf, OPKG_INFO,
 972                                  "  not removing obsolesced files because package marked noprune\n");
 973                } else {
 974                     opkg_message(conf, OPKG_INFO,
 975                                  "  removing obsolesced files\n");
 976                     remove_obsolesced_files(conf, pkg, old_pkg);
 977                }
 978                /* removing files from old package, to avoid ghost files */
 979                remove_data_files_and_list(conf, old_pkg);
 980 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 981                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 982                remove_postrm(conf, old_pkg);
 983 /* Pigi */
 984
 985           }
 986
 987
 988           opkg_message(conf, OPKG_INFO,
 989                        "  installing maintainer scripts\n");
 990           install_maintainer_scripts(conf, pkg, old_pkg);
 991
 992           /* the following just returns 0 */
 993           remove_disappeared(conf, pkg);
 994
 995           opkg_message(conf, OPKG_INFO,
 996                        "  installing data files\n");
 997           install_data_files(conf, pkg);
 998
 999 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1000           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1001
1002           opkg_message(conf, OPKG_INFO,
1003                        "  resolving conf files\n");
1004           resolve_conffiles(conf, pkg);
1005
1006           pkg->state_status = SS_UNPACKED;
1007           old_state_flag = pkg->state_flag;
1008           pkg->state_flag &= ~SF_PREFER;
1009           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1010
1011           if (old_pkg && !conf->force_reinstall) {
1012                old_pkg->state_status = SS_NOT_INSTALLED;
1013           }
1014
1015           time(&pkg->installed_time);
1016
1017           opkg_message(conf, OPKG_INFO,
1018                        "  cleanup temp files\n");
1019           cleanup_temporary_files(conf, pkg);
1020
1021           ab_pkg = pkg->parent;
1022           if (ab_pkg)
1023                ab_pkg->state_status = pkg->state_status;
1024
1025           opkg_message(conf, OPKG_INFO, "Done.\n");
1026
1027           if (use_signal)
1028                signal(SIGINT, old_handler);
1029           else
1030                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1031           pkg_vec_free (replacees);
1032           return 0;
1033
1034
1035      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1036           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1037      UNWIND_CHECK_DATA_FILE_CLASHES:
1038           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1039      UNWIND_BACKUP_MODIFIED_CONFFILES:
1040           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1041      UNWIND_PREINST_CONFIGURE:
1042           preinst_configure_unwind(conf, pkg, old_pkg);
1043      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1044           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1045      UNWIND_PRERM_UPGRADE_OLD_PKG:
1046           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1047      UNWIND_REMOVE_INSTALLED_REPLACEES:
1048           pkg_remove_installed_replacees_unwind(conf, replacees);
1049
1050           opkg_message(conf, OPKG_INFO,
1051                        "  cleanup temp files\n");
1052           cleanup_temporary_files(conf, pkg);
1053
1054           opkg_message(conf, OPKG_INFO,
1055                        "Failed.\n");
1056           if (use_signal)
1057                signal(SIGINT, old_handler);
1058           else
1059                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1060
1061           pkg_vec_free (replacees);
1062           return OPKG_ERR_UNKNOWN;
1063      }
1064 }
1065
1066 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1067 {
1068      /* DPKG_INCOMPATIBILITY:
1069         dpkg does some things here that we don't do yet. Do we care?
1070
1071         1. If a version of the package is already installed, call
1072            old-prerm upgrade new-version
1073         2. If the script runs but exits with a non-zero exit status
1074            new-prerm failed-upgrade old-version
1075            Error unwind, for both the above cases:
1076            old-postinst abort-upgrade new-version
1077      */
1078      return 0;
1079 }
1080
1081 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1082 {
1083      /* DPKG_INCOMPATIBILITY:
1084         dpkg does some things here that we don't do yet. Do we care?
1085         (See prerm_upgrade_old_package for details)
1086      */
1087      return 0;
1088 }
1089
1090 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1091 {
1092      /* DPKG_INCOMPATIBILITY:
1093         dpkg does some things here that we don't do yet. Do we care?
1094         2. If a 'conflicting' package is being removed at the same time:
1095                 1. If any packages depended on that conflicting package and
1096                    --auto-deconfigure is specified, call, for each such package:
1097                    deconfigured's-prerm deconfigure \
1098                    in-favour package-being-installed version \
1099                    removing conflicting-package version
1100                 Error unwind:
1101                    deconfigured's-postinst abort-deconfigure \
1102                    in-favour package-being-installed-but-failed version \
1103                    removing conflicting-package version
1104
1105                    The deconfigured packages are marked as requiring
1106                    configuration, so that if --install is used they will be
1107                    configured again if possible.
1108                 2. To prepare for removal of the conflicting package, call:
1109                    conflictor's-prerm remove in-favour package new-version
1110                 Error unwind:
1111                    conflictor's-postinst abort-remove in-favour package new-version
1112      */
1113      return 0;
1114 }
1115
1116 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1117 {
1118      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1119         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1120         details) */
1121      return 0;
1122 }
1123
1124 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1125 {
1126      int err;
1127      char *preinst_args;
1128
1129      if (old_pkg) {
1130           char *old_version = pkg_version_str_alloc(old_pkg);
1131           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1132           free(old_version);
1133      } else if (pkg->state_status == SS_CONFIG_FILES) {
1134           char *pkg_version = pkg_version_str_alloc(pkg);
1135           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1136           free(pkg_version);
1137      } else {
1138           preinst_args = xstrdup("install");
1139      }
1140
1141      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1142      if (err) {
1143           opkg_message(conf, OPKG_ERROR,
1144                        "Aborting installation of %s\n", pkg->name);
1145           return 1;
1146      }
1147
1148      free(preinst_args);
1149
1150      return 0;
1151 }
1152
1153 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1154 {
1155      /* DPKG_INCOMPATIBILITY:
1156         dpkg does the following error unwind, should we?
1157         pkg->postrm abort-upgrade old-version
1158         OR pkg->postrm abort-install old-version
1159         OR pkg->postrm abort-install
1160      */
1161      return 0;
1162 }
1163
1164 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1165 {
1166      int err;
1167      conffile_list_elt_t *iter;
1168      conffile_t *cf;
1169
1170      if (conf->noaction) return 0;
1171
1172      /* Backup all modified conffiles */
1173      if (old_pkg) {
1174           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1175                char *cf_name;
1176
1177                cf = iter->data;
1178                cf_name = root_filename_alloc(conf, cf->name);
1179
1180                /* Don't worry if the conffile is just plain gone */
1181                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1182                     err = backup_make_backup(conf, cf_name);
1183                     if (err) {
1184                          return err;
1185                     }
1186                }
1187                free(cf_name);
1188           }
1189      }
1190
1191      /* Backup all conffiles that were not conffiles in old_pkg */
1192      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1193           char *cf_name;
1194           cf = (conffile_t *)iter->data;
1195           cf_name = root_filename_alloc(conf, cf->name);
1196           /* Ignore if this was a conffile in old_pkg as well */
1197           if (pkg_get_conffile(old_pkg, cf->name)) {
1198                continue;
1199           }
1200
1201           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1202                err = backup_make_backup(conf, cf_name);
1203                if (err) {
1204                     return err;
1205                }
1206           }
1207           free(cf_name);
1208      }
1209
1210      return 0;
1211 }
1212
1213 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1214 {
1215      conffile_list_elt_t *iter;
1216
1217      if (old_pkg) {
1218           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1219                backup_remove(((nv_pair_t *)iter->data)->name);
1220           }
1221      }
1222
1223      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1224           backup_remove(((nv_pair_t *)iter->data)->name);
1225      }
1226
1227      return 0;
1228 }
1229
1230
1231 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1232 {
1233      /* DPKG_INCOMPATIBILITY:
1234         opkg takes a slightly different approach than dpkg at this
1235         point.  dpkg installs each file in the new package while
1236         creating a backup for any file that is replaced, (so that it
1237         can unwind if necessary).  To avoid complexity and redundant
1238         storage, opkg doesn't do any installation until later, (at the
1239         point at which dpkg removes the backups.
1240
1241         But, we do have to check for data file clashes, since after
1242         installing a package with a file clash, removing either of the
1243         packages involved in the clash has the potential to break the
1244         other package.
1245      */
1246      str_list_t *files_list;
1247      str_list_elt_t *iter, *niter;
1248
1249      int clashes = 0;
1250
1251      files_list = pkg_get_installed_files(pkg);
1252      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1253              iter;
1254              iter = niter, niter = str_list_next(files_list, iter)) {
1255           char *root_filename;
1256           char *filename = (char *) iter->data;
1257           root_filename = root_filename_alloc(conf, filename);
1258           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1259                pkg_t *owner;
1260                pkg_t *obs;
1261                /* Pre-existing conffiles are OK */
1262                /* @@@@ should have way to check that it is a conffile -Jamey */
1263                if (backup_exists_for(root_filename)) {
1264                     continue;
1265                }
1266
1267                /* Pre-existing files are OK if force-overwrite was asserted. */
1268                if (conf->force_overwrite) {
1269                     /* but we need to change who owns this file */
1270                     file_hash_set_file_owner(conf, filename, pkg);
1271                     continue;
1272                }
1273
1274                owner = file_hash_get_file_owner(conf, filename);
1275
1276                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1277                if (owner && old_pkg) {
1278                     if (strcmp(owner->name, old_pkg->name) == 0) {
1279                          continue;
1280                     }
1281                }
1282
1283                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1284                if (owner) {
1285                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1286                     if (pkg_replaces(pkg, owner)) {
1287                          continue;
1288                     }
1289 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1290    then it's ok to overwrite. */
1291                     if (strcmp(owner->name,pkg->name)==0){
1292                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1293                          continue;
1294                     }
1295                }
1296
1297                /* Pre-existing files are OK if they are obsolete */
1298                obs = hash_table_get(&conf->obs_file_hash, filename);
1299                if (obs) {
1300                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1301                     continue;
1302                }
1303
1304                /* We have found a clash. */
1305                opkg_message(conf, OPKG_ERROR,
1306                             "Package %s wants to install file %s\n"
1307                             "\tBut that file is already provided by package ",
1308                             pkg->name, filename);
1309                if (owner) {
1310                     opkg_message(conf, OPKG_ERROR,
1311                                  "%s\n", owner->name);
1312                } else {
1313                     opkg_message(conf, OPKG_ERROR,
1314                                  "<no package>\nPlease move this file out of the way and try again.\n");
1315                }
1316                clashes++;
1317           }
1318           free(root_filename);
1319      }
1320      pkg_free_installed_files(pkg);
1321
1322      return clashes;
1323 }
1324
1325 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1326 {
1327     /* Basically that's the worst hack I could do to be able to change ownership of
1328        file list, but, being that we have no way to unwind the mods, due to structure
1329        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1330        What we do here is change the ownership of file in hash if a replace ( or similar events
1331        happens )
1332        Only the action that are needed to change name should be considered.
1333        @@@ To change after 1.0 release.
1334      */
1335      str_list_t *files_list;
1336      str_list_elt_t *iter, *niter;
1337
1338      char *root_filename = NULL;
1339
1340      int clashes = 0;
1341
1342      files_list = pkg_get_installed_files(pkg);
1343      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1344              iter;
1345              iter = niter, niter = str_list_next(files_list, niter)) {
1346           char *filename = (char *) iter->data;
1347           if (root_filename) {
1348               free(root_filename);
1349               root_filename = NULL;
1350           }
1351           root_filename = root_filename_alloc(conf, filename);
1352           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1353                pkg_t *owner;
1354
1355                owner = file_hash_get_file_owner(conf, filename);
1356
1357                if (conf->force_overwrite) {
1358                     /* but we need to change who owns this file */
1359                     file_hash_set_file_owner(conf, filename, pkg);
1360                     continue;
1361                }
1362
1363
1364                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1365                if (owner) {
1366                     if (pkg_replaces(pkg, owner)) {
1367 /* It's now time to change the owner of that file.
1368    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1369                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1370                          file_hash_set_file_owner(conf, filename, pkg);
1371                          continue;
1372                     }
1373                }
1374
1375           }
1376      }
1377      if (root_filename) {
1378          free(root_filename);
1379          root_filename = NULL;
1380      }
1381      pkg_free_installed_files(pkg);
1382
1383      return clashes;
1384 }
1385
1386 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1387 {
1388      /* Nothing to do since check_data_file_clashes doesn't change state */
1389      return 0;
1390 }
1391
1392 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1393 {
1394      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1395         1. If the package is being upgraded, call
1396            old-postrm upgrade new-version
1397         2. If this fails, attempt:
1398            new-postrm failed-upgrade old-version
1399         Error unwind, for both cases:
1400            old-preinst abort-upgrade new-version    */
1401      return 0;
1402 }
1403
1404 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1405 {
1406      /* DPKG_INCOMPATIBILITY:
1407         dpkg does some things here that we don't do yet. Do we care?
1408         (See postrm_upgrade_old_pkg for details)
1409      */
1410     return 0;
1411 }
1412
1413 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1414 {
1415      int err;
1416      str_list_t *old_files;
1417      str_list_elt_t *of;
1418      str_list_t *new_files;
1419      str_list_elt_t *nf;
1420      hash_table_t new_files_table;
1421
1422      if (old_pkg == NULL) {
1423           return 0;
1424      }
1425
1426      old_files = pkg_get_installed_files(old_pkg);
1427      new_files = pkg_get_installed_files(pkg);
1428
1429      new_files_table.entries = NULL;
1430      hash_table_init("new_files" , &new_files_table, 20);
1431      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1432          if (nf && nf->data)
1433             hash_table_insert(&new_files_table, nf->data, nf->data);
1434      }
1435
1436      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1437           pkg_t *owner;
1438           char *old, *new;
1439           old = (char *)of->data;
1440           new = (char *) hash_table_get (&new_files_table, old);
1441           if (new)
1442                continue;
1443
1444           if (file_is_dir(old)) {
1445                continue;
1446           }
1447           owner = file_hash_get_file_owner(conf, old);
1448           if (owner != old_pkg) {
1449                /* in case obsolete file no longer belongs to old_pkg */
1450                continue;
1451           }
1452
1453           /* old file is obsolete */
1454           opkg_message(conf, OPKG_INFO,
1455                        "    removing obsolete file %s\n", old);
1456           if (!conf->noaction) {
1457                err = unlink(old);
1458                if (err) {
1459                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1460                                  strerror(errno));
1461                }
1462           }
1463      }
1464
1465      hash_table_deinit(&new_files_table);
1466      pkg_free_installed_files(old_pkg);
1467      pkg_free_installed_files(pkg);
1468
1469      return 0;
1470 }
1471
1472 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1473 {
1474      int ret;
1475      char *prefix;
1476
1477      sprintf_alloc(&prefix, "%s.", pkg->name);
1478      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1479                                                         pkg->dest->info_dir,
1480                                                         prefix);
1481      free(prefix);
1482      return ret;
1483 }
1484
1485 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1486 {
1487      /* DPKG_INCOMPATIBILITY:
1488         This is a fairly sophisticated dpkg operation. Shall we
1489         skip it? */
1490
1491      /* Any packages all of whose files have been overwritten during the
1492         installation, and which aren't required for dependencies, are
1493         considered to have been removed. For each such package
1494         1. disappearer's-postrm disappear overwriter overwriter-version
1495         2. The package's maintainer scripts are removed
1496         3. It is noted in the status database as being in a sane state,
1497            namely not installed (any conffiles it may have are ignored,
1498            rather than being removed by dpkg). Note that disappearing
1499            packages do not have their prerm called, because dpkg doesn't
1500            know in advance that the package is going to vanish.
1501      */
1502      return 0;
1503 }
1504
1505 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1506 {
1507      int err;
1508
1509      /* opkg takes a slightly different approach to data file backups
1510         than dpkg. Rather than removing backups at this point, we
1511         actually do the data file installation now. See comments in
1512         check_data_file_clashes() for more details. */
1513
1514      opkg_message(conf, OPKG_INFO,
1515                   "    extracting data files to %s\n", pkg->dest->root_dir);
1516      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1517      if (err) {
1518           return err;
1519      }
1520
1521      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1522         so we can't save ourself from removing important packages
1523         At this point we (should) have extracted the .control file, so it
1524         would be a good idea to reload the data in it, and set the Essential
1525         state in *pkg. From now on the Essential is back in status file and
1526         we can protect again.
1527         We should operate this way:
1528         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1529         check for "Essential" in it
1530         set the value in pkg->essential.
1531         This new routine could be useful also for every other flag
1532         Pigi: 16/03/2004 */
1533      set_flags_from_control(conf, pkg) ;
1534
1535      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1536      err = pkg_write_filelist(conf, pkg);
1537      if (err)
1538           return err;
1539
1540      /* XXX: FEATURE: opkg should identify any files which existed
1541         before installation and which were overwritten, (see
1542         check_data_file_clashes()). What it must do is remove any such
1543         files from the filelist of the old package which provided the
1544         file. Otherwise, if the old package were removed at some point
1545         it would break the new package. Removing the new package will
1546         also break the old one, but this cannot be helped since the old
1547         package's file has already been deleted. This is the importance
1548         of check_data_file_clashes(), and only allowing opkg to install
1549         a clashing package with a user force. */
1550
1551      return 0;
1552 }
1553
1554 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1555 {
1556      conffile_list_elt_t *iter;
1557      conffile_t *cf;
1558      char *cf_backup;
1559      char *md5sum;
1560
1561      if (conf->noaction) return 0;
1562
1563      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1564           char *root_filename;
1565           cf = (conffile_t *)iter->data;
1566           root_filename = root_filename_alloc(conf, cf->name);
1567
1568           /* Might need to initialize the md5sum for each conffile */
1569           if (cf->value == NULL) {
1570                cf->value = file_md5sum_alloc(root_filename);
1571           }
1572
1573           if (!file_exists(root_filename)) {
1574                free(root_filename);
1575                continue;
1576           }
1577
1578           cf_backup = backup_filename_alloc(root_filename);
1579
1580
1581           if (file_exists(cf_backup)) {
1582               /* Let's compute md5 to test if files are changed */
1583               md5sum = file_md5sum_alloc(cf_backup);
1584               if (md5sum && cf->value && strcmp(cf->value,md5sum) != 0 ) {
1585                   if (conf->force_maintainer) {
1586                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1587                   } else if (conf->force_defaults
1588                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1589                       rename(cf_backup, root_filename);
1590                   }
1591               }
1592               unlink(cf_backup);
1593               if (md5sum)
1594                   free(md5sum);
1595           }
1596
1597           free(cf_backup);
1598           free(root_filename);
1599      }
1600
1601      return 0;
1602 }
1603
1604 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1605 {
1606      char *response;
1607      const char *short_file_name;
1608
1609      short_file_name = strrchr(file_name, '/');
1610      if (short_file_name) {
1611           short_file_name++;
1612      } else {
1613           short_file_name = file_name;
1614      }
1615
1616      while (1) {
1617           response = get_user_response("    Configuration file '%s'\n"
1618                                        "    ==> File on system created by you or by a script.\n"
1619                                        "    ==> File also in package provided by package maintainer.\n"
1620                                        "       What would you like to do about it ?  Your options are:\n"
1621                                        "        Y or I  : install the package maintainer's version\n"
1622                                        "        N or O  : keep your currently-installed version\n"
1623                                        "          D     : show the differences between the versions (if diff is installed)\n"
1624                                        "     The default action is to keep your current version.\n"
1625                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1626           if (strcmp(response, "y") == 0
1627               || strcmp(response, "i") == 0
1628               || strcmp(response, "yes") == 0) {
1629                free(response);
1630                return 0;
1631           }
1632
1633           if (strcmp(response, "d") == 0) {
1634                char *cmd;
1635
1636                free(response);
1637                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1638                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1639                xsystem(cmd);
1640                free(cmd);
1641                printf("    [Press ENTER to continue]\n");
1642                response = file_read_line_alloc(stdin);
1643                free(response);
1644                continue;
1645           }
1646
1647           free(response);
1648           return 1;
1649      }
1650 }
1651
1652 /* XXX: CLEANUP: I'd like to move all of the code for
1653    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1654    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1655    pkg_deinit for example). */
1656 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1657 {
1658      DIR *tmp_dir;
1659      struct dirent *dirent;
1660      char *tmp_file;
1661
1662 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1663 #error
1664      opkg_message(conf, OPKG_DEBUG,
1665                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1666                   __FUNCTION__, pkg->tmp_unpack_dir);
1667      return 0;
1668 #endif
1669
1670      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1671           tmp_dir = opendir(pkg->tmp_unpack_dir);
1672           if (tmp_dir) {
1673                while (1) {
1674                     dirent = readdir(tmp_dir);
1675                     if (dirent == NULL) {
1676                          break;
1677                     }
1678                     sprintf_alloc(&tmp_file, "%s/%s",
1679                                   pkg->tmp_unpack_dir, dirent->d_name);
1680                     if (! file_is_dir(tmp_file)) {
1681                          unlink(tmp_file);
1682                     }
1683                     free(tmp_file);
1684                }
1685                closedir(tmp_dir);
1686                rmdir(pkg->tmp_unpack_dir);
1687                free(pkg->tmp_unpack_dir);
1688                pkg->tmp_unpack_dir = NULL;
1689           }
1690      }
1691
1692      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1693                   pkg->name, pkg->local_filename, conf->tmp_dir);
1694      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1695           unlink(pkg->local_filename);
1696           free(pkg->local_filename);
1697           pkg->local_filename = NULL;
1698      }
1699
1700      return 0;
1701 }
1702
1703 static char *backup_filename_alloc(const char *file_name)
1704 {
1705      char *backup;
1706
1707      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1708
1709      return backup;
1710 }
1711
1712 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1713 {
1714      int err;
1715      char *backup;
1716
1717      backup = backup_filename_alloc(file_name);
1718      err = file_copy(file_name, backup);
1719      if (err) {
1720           opkg_message(conf, OPKG_ERROR,
1721                        "%s: Failed to copy %s to %s\n",
1722                        __FUNCTION__, file_name, backup);
1723      }
1724
1725      free(backup);
1726
1727      return err;
1728 }
1729
1730 static int backup_exists_for(const char *file_name)
1731 {
1732      int ret;
1733      char *backup;
1734
1735      backup = backup_filename_alloc(file_name);
1736
1737      ret = file_exists(backup);
1738
1739      free(backup);
1740
1741      return ret;
1742 }
1743
1744 static int backup_remove(const char *file_name)
1745 {
1746      char *backup;
1747
1748      backup = backup_filename_alloc(file_name);
1749      unlink(backup);
1750      free(backup);
1751
1752      return 0;
1753 }
1754