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 typedef void (*sighandler_t)(int);
  25
  26 #include "pkg.h"
  27 #include "pkg_hash.h"
  28 #include "pkg_extract.h"
  29
  30 #include "opkg_install.h"
  31 #include "opkg_configure.h"
  32 #include "opkg_download.h"
  33 #include "opkg_remove.h"
  34
  35 #include "opkg_utils.h"
  36 #include "opkg_message.h"
  37 #include "opkg_state.h"
  38 #include "opkg_defines.h"
  39
  40 #include "sprintf_alloc.h"
  41 #include "file_util.h"
  42 #include "str_util.h"
  43 #include "xsystem.h"
  44 #include "user.h"
  45
  46 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg);
  47 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
  48 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
  49
  50 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  51 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  52 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  53 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  54 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  55 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  56 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  57 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  58 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  59 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  60 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  61 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  62 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  63
  64 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  65 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  66 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
  67 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
  68 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
  69
  70 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
  71
  72 static int user_prefers_old_conffile(const char *file, const char *backup);
  73
  74 static char *backup_filename_alloc(const char *file_name);
  75 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
  76 static int backup_exists_for(const char *file_name);
  77 static int backup_remove(const char *file_name);
  78
  79
  80 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
  81 {
  82      int err, cmp;
  83      pkg_t *pkg, *old;
  84      char *old_version, *new_version;
  85
  86      pkg = pkg_new();
  87      if (pkg == NULL) {
  88           return ENOMEM;
  89      }
  90
  91      err = pkg_init_from_file(pkg, filename);
  92      if (err) {
  93           return err;
  94      }
  95
  96      if (!pkg->architecture) {
  97           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
  98           return -EINVAL;
  99      }
 100
 101      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
 102         freeing the pkg that we pass in. It might be nice to clean this up
 103         if possible.  */
 104      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 105      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 106
 107      pkg->local_filename = strdup(filename);
 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;
 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 #if 0
 314 int name_mark_dependencies_for_installation(opkg_conf_t *conf, const char *pkg_name, pkg_vec_t *pkgs_needed)
 315 {
 316      int cmp;
 317      pkg_t *old, *new;
 318      char *old_version, *new_version;
 319
 320      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 321
 322      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name);
 323      if (new == NULL) {
 324           return OPKG_PKG_HAS_NO_CANDIDATE;
 325      }
 326      if (old) {
 327           old_version = pkg_version_str_alloc(old);
 328           new_version = pkg_version_str_alloc(new);
 329
 330           cmp = pkg_compare_versions(old, new);
 331           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 332             opkg_message(conf, OPKG_DEBUG, " Forcing downgrade ");
 333              cmp = -1 ;                                       /* then we force opkg to downgrade */
 334                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 335                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 336           }
 337           opkg_message(conf, OPKG_DEBUG,
 338                        "comparing visible versions of pkg %s:"
 339                        "\n\t%s is installed "
 340                        "\n\t%s is available "
 341                        "\n\t%d was comparison result\n",
 342                        pkg_name, old_version, new_version, cmp);
 343           if (cmp == 0 && !conf->force_reinstall) {
 344                opkg_message(conf, OPKG_NOTICE,
 345                             "Package %s (%s) installed in %s is up to date.\n",
 346                             old->name, old_version, old->dest->name);
 347                free(old_version);
 348                free(new_version);
 349                return 0;
 350           } else if (cmp > 0) {
 351                opkg_message(conf, OPKG_NOTICE,
 352                             "Not downgrading package %s on %s from %s to %s.\n",
 353                             old->name, old->dest->name, old_version, new_version);
 354                free(old_version);
 355                free(new_version);
 356                return 0;
 357           } else if (cmp < 0) {
 358                new->dest = old->dest;
 359                old->state_want = SW_DEINSTALL;
 360                old->state_flag |= SF_OBSOLETE;
 361           }
 362      }
 363      return pkg_mark_dependencies_for_installation(conf, new, pkgs_needed);
 364 }
 365
 366 #endif
 367
 368 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 369 {
 370      int i, err;
 371      pkg_vec_t *depends = pkg_vec_alloc();
 372      pkg_t *dep;
 373      char **unresolved = NULL;
 374      int ndepends;
 375
 376      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 377                                                         pkg, depends,
 378                                                         &unresolved);
 379
 380      if (unresolved) {
 381           opkg_message(conf, OPKG_ERROR,
 382                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 383                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 384           while (*unresolved) {
 385                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 386                unresolved++;
 387           }
 388           opkg_message(conf, OPKG_ERROR, "\n");
 389           if (! conf->force_depends) {
 390                opkg_message(conf, OPKG_INFO,
 391                             "This could mean that your package list is out of date or that the packages\n"
 392                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 393                             "of this problem try again with the '-force-depends' option.\n");
 394                pkg_vec_free(depends);
 395                return OPKG_PKG_DEPS_UNSATISFIED;
 396           }
 397      }
 398
 399      if (ndepends <= 0) {
 400           pkg_vec_free(depends);
 401           return 0;
 402      }
 403
 404      /* Mark packages as to-be-installed */
 405      for (i=0; i < depends->len; i++) {
 406           /* Dependencies should be installed the same place as pkg */
 407           if (depends->pkgs[i]->dest == NULL) {
 408                depends->pkgs[i]->dest = pkg->dest;
 409           }
 410           depends->pkgs[i]->state_want = SW_INSTALL;
 411      }
 412
 413      for (i = 0; i < depends->len; i++) {
 414           dep = depends->pkgs[i];
 415           /* The package was uninstalled when we started, but another
 416              dep earlier in this loop may have depended on it and pulled
 417              it in, so check first. */
 418           if ((dep->state_status != SS_INSTALLED)
 419               && (dep->state_status != SS_UNPACKED)) {
 420                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 421                err = opkg_install_pkg(conf, dep,0);
 422                /* mark this package as having been automatically installed to
 423                 * satisfy a dependancy */
 424                dep->auto_installed = 1;
 425                if (err) {
 426                     pkg_vec_free(depends);
 427                     return err;
 428                }
 429           }
 430      }
 431
 432      pkg_vec_free(depends);
 433
 434      return 0;
 435 }
 436
 437
 438 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 439 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 440 {
 441      if (conf->nodeps == 0) {
 442           int i;
 443           pkg_vec_t *installed = pkg_vec_alloc();
 444           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 445           for (i = 0; i < installed->len; i++) {
 446                pkg_t *pkg = installed->pkgs[i];
 447                satisfy_dependencies_for(conf, pkg);
 448           }
 449           pkg_vec_free(installed);
 450      }
 451      return 0;
 452 }
 453
 454 \f
 455
 456 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 457 {
 458      int i;
 459      pkg_vec_t *conflicts = NULL;
 460      int level;
 461      const char *prefix;
 462      if (conf->force_depends) {
 463           level = OPKG_NOTICE;
 464           prefix = "Warning";
 465      } else {
 466           level = OPKG_ERROR;
 467           prefix = "ERROR";
 468      }
 469
 470      if (!conf->force_depends)
 471           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 472
 473      if (conflicts) {
 474           opkg_message(conf, level,
 475                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 476           i = 0;
 477           while (i < conflicts->len)
 478                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 479           opkg_message(conf, level, "\n");
 480           pkg_vec_free(conflicts);
 481           return OPKG_PKG_DEPS_UNSATISFIED;
 482      }
 483      return 0;
 484 }
 485
 486 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 487 {
 488      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 489      str_list_elt_t *iter;
 490
 491      for (iter = new_list->head; iter; iter = iter->next) {
 492           char *new_file = iter->data;
 493           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 494           if (!new_file)
 495                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 496           if (!owner || (owner == old_pkg))
 497                file_hash_set_file_owner(conf, new_file, new_pkg);
 498      }
 499      if (old_pkg) {
 500           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 501           for (iter = old_list->head; iter; iter = iter->next) {
 502                char *old_file = iter->data;
 503                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 504                if (owner == old_pkg) {
 505                     /* obsolete */
 506                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 507                }
 508           }
 509      }
 510      return 0;
 511 }
 512
 513 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 514 {
 515     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 516
 517     /* sma 6.20.02:  yup; here's the first bit */
 518     /*
 519      * XXX: BUG easy for cworth
 520      * 1) please point the call below to the correct current root destination
 521      * 2) we need to resolve how to check the required space for a pending pkg,
 522      *    my diddling with the .ipk file size below isn't going to cut it.
 523      * 3) return a proper error code instead of 1
 524      */
 525      int comp_size, blocks_available;
 526
 527      if (!conf->force_space && pkg->installed_size != NULL) {
 528           blocks_available = get_available_blocks(conf->default_dest->root_dir);
 529
 530           comp_size = strtoul(pkg->installed_size, NULL, 0);
 531           /* round up a blocks count without doing fancy-but-slow casting jazz */
 532           comp_size = (int)((comp_size + 1023) / 1024);
 533
 534           if (comp_size >= blocks_available) {
 535                opkg_message(conf, OPKG_ERROR,
 536                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 537                             blocks_available, conf->default_dest->root_dir, pkg->name, comp_size);
 538                return ENOSPC;
 539           }
 540      }
 541      return 0;
 542 }
 543
 544 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 545 {
 546      int err;
 547      char *conffiles_file_name;
 548      char *root_dir;
 549      FILE *conffiles_file;
 550
 551      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 552
 553      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 554      if (pkg->tmp_unpack_dir == NULL) {
 555           opkg_message(conf, OPKG_ERROR,
 556                        "%s: Failed to create temporary directory '%s': %s\n",
 557                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 558           return errno;
 559      }
 560
 561      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 562      if (err) {
 563           return err;
 564      }
 565
 566      /* XXX: CLEANUP: There might be a cleaner place to read in the
 567         conffiles. Seems like I should be able to get everything to go
 568         through pkg_init_from_file. If so, maybe it would make sense to
 569         move all of unpack_pkg_control_files to that function. */
 570
 571      /* Don't need to re-read conffiles if we already have it */
 572      if (pkg->conffiles.head) {
 573           return 0;
 574      }
 575
 576      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 577      if (! file_exists(conffiles_file_name)) {
 578           free(conffiles_file_name);
 579           return 0;
 580      }
 581
 582      conffiles_file = fopen(conffiles_file_name, "r");
 583      if (conffiles_file == NULL) {
 584           fprintf(stderr, "%s: failed to open %s: %s\n",
 585                   __FUNCTION__, conffiles_file_name, strerror(errno));
 586           free(conffiles_file_name);
 587           return errno;
 588      }
 589      free(conffiles_file_name);
 590
 591      while (1) {
 592           char *cf_name;
 593           char *cf_name_in_dest;
 594
 595           cf_name = file_read_line_alloc(conffiles_file);
 596           if (cf_name == NULL) {
 597                break;
 598           }
 599           str_chomp(cf_name);
 600           if (cf_name[0] == '\0') {
 601                continue;
 602           }
 603
 604           /* Prepend dest->root_dir to conffile name.
 605              Take pains to avoid multiple slashes. */
 606           root_dir = pkg->dest->root_dir;
 607           if (conf->offline_root)
 608                /* skip the offline_root prefix */
 609                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 610           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 611                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 612
 613           /* Can't get an md5sum now, (file isn't extracted yet).
 614              We'll wait until resolve_conffiles */
 615           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 616
 617           free(cf_name);
 618           free(cf_name_in_dest);
 619      }
 620
 621      fclose(conffiles_file);
 622
 623      return 0;
 624 }
 625
 626 /* returns number of installed replacees */
 627 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 628 {
 629      abstract_pkg_t **replaces = pkg->replaces;
 630      int replaces_count = pkg->replaces_count;
 631      int i, j;
 632      for (i = 0; i < replaces_count; i++) {
 633           abstract_pkg_t *ab_pkg = replaces[i];
 634           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 635           if (pkg_vec) {
 636                for (j = 0; j < pkg_vec->len; j++) {
 637                     pkg_t *replacee = pkg_vec->pkgs[j];
 638                     if (!pkg_conflicts(pkg, replacee))
 639                          continue;
 640                     if (replacee->state_status == SS_INSTALLED) {
 641                          pkg_vec_insert(installed_replacees, replacee);
 642                     }
 643                }
 644           }
 645      }
 646      return installed_replacees->len;
 647 }
 648
 649 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 650 {
 651      int i;
 652      int replaces_count = replacees->len;
 653      for (i = 0; i < replaces_count; i++) {
 654           pkg_t *replacee = replacees->pkgs[i];
 655           int err;
 656           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 657           err = opkg_remove_pkg(conf, replacee,0);
 658           if (err)
 659                return err;
 660      }
 661      return 0;
 662 }
 663
 664 /* to unwind the removal: make sure they are installed */
 665 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 666 {
 667      int i, err;
 668      int replaces_count = replacees->len;
 669      for (i = 0; i < replaces_count; i++) {
 670           pkg_t *replacee = replacees->pkgs[i];
 671           if (replacee->state_status != SS_INSTALLED) {
 672                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 673                err = opkg_install_pkg(conf, replacee,0);
 674                if (err)
 675                     return err;
 676           }
 677      }
 678      return 0;
 679 }
 680
 681 int caught_sigint = 0;
 682 static void opkg_install_pkg_sigint_handler(int sig)
 683 {
 684      caught_sigint = sig;
 685 }
 686
 687 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 688 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 689 {
 690      if (old_pkg) {
 691           char message_out[15];
 692           char *old_version = pkg_version_str_alloc(old_pkg);
 693           char *new_version = pkg_version_str_alloc(pkg);
 694           int cmp = pkg_compare_versions(old_pkg, pkg);
 695           int rc = 0;
 696
 697           memset(message_out,'\x0',15);
 698           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 699           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 700              cmp = -1 ;                                       /* then we force opkg to downgrade */
 701              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 702                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 703           }
 704
 705           if (cmp > 0) {
 706                opkg_message(conf, OPKG_NOTICE,
 707                             "Not downgrading package %s on %s from %s to %s.\n",
 708                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 709                rc = 1;
 710           } else if (cmp < 0) {
 711                opkg_message(conf, OPKG_NOTICE,
 712                             "%s%s on %s from %s to %s...\n",
 713                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 714                pkg->dest = old_pkg->dest;
 715                rc = 0;
 716           } else /* cmp == 0 */ {
 717                if (conf->force_reinstall) {
 718                     opkg_message(conf, OPKG_NOTICE,
 719                                  "Reinstalling %s (%s) on %s...\n",
 720                                  pkg->name, new_version, old_pkg->dest->name);
 721                     pkg->dest = old_pkg->dest;
 722                     rc = 0;
 723                } else {
 724                     opkg_message(conf, OPKG_NOTICE,
 725                                  "Not installing %s (%s) on %s -- already installed.\n",
 726                                  pkg->name, new_version, old_pkg->dest->name);
 727                     rc = 1;
 728                }
 729           }
 730           free(old_version);
 731           free(new_version);
 732           return rc;
 733      } else {
 734       char message_out[15] ;
 735       memset(message_out,'\x0',15);
 736       if ( message )
 737           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 738       else
 739           strncpy( message_out,"Installing ",strlen("Installing ") );
 740           char *version = pkg_version_str_alloc(pkg);
 741
 742           opkg_message(conf, OPKG_NOTICE,
 743                        "%s%s (%s) to %s...\n", message_out,
 744                        pkg->name, version, pkg->dest->name);
 745           free(version);
 746           return 0;
 747      }
 748 }
 749
 750 /* and now the meat... */
 751 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 752 {
 753      int err = 0;
 754      int message = 0;
 755      pkg_t *old_pkg = NULL;
 756      pkg_vec_t *replacees;
 757      abstract_pkg_t *ab_pkg = NULL;
 758      int old_state_flag;
 759      char* file_md5;
 760      char *pkgid;
 761
 762      if ( from_upgrade )
 763         message = 1;            /* Coming from an upgrade, and should change the output message */
 764
 765      if (!pkg) {
 766           opkg_message(conf, OPKG_ERROR,
 767                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 768           return OPKG_INSTALL_ERR_INTERNAL;
 769      }
 770
 771      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 772
 773      if (!pkg_arch_supported(conf, pkg)) {
 774           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 775                        pkg->architecture, pkg->name);
 776           return OPKG_INSTALL_ERR_INTERNAL;
 777      }
 778      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 779           err = satisfy_dependencies_for(conf, pkg);
 780           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 781
 782           opkg_message(conf, OPKG_NOTICE,
 783                        "Package %s is already installed in %s.\n",
 784                        pkg->name, pkg->dest->name);
 785           return 0;
 786      }
 787
 788      if (pkg->dest == NULL) {
 789           pkg->dest = conf->default_dest;
 790      }
 791
 792      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 793
 794      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 795      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 796
 797      pkg->state_want = SW_INSTALL;
 798      if (old_pkg){
 799          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 800      }
 801
 802
 803      /* Abhaya: conflicts check */
 804      err = check_conflicts_for(conf, pkg);
 805      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 806
 807      /* this setup is to remove the upgrade scenario in the end when
 808         installing pkg A, A deps B & B deps on A. So both B and A are
 809         installed. Then A's installation is started resulting in an
 810         uncecessary upgrade */
 811      if (pkg->state_status == SS_INSTALLED
 812          && conf->force_reinstall == 0) return 0;
 813
 814      err = verify_pkg_installable(conf, pkg);
 815      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 816
 817      if (pkg->local_filename == NULL) {
 818           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 819           if (err) {
 820                opkg_message(conf, OPKG_ERROR,
 821                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 822                             pkg->name);
 823                return OPKG_INSTALL_ERR_DOWNLOAD;
 824           }
 825      }
 826
 827      /* check that the repository is valid */
 828      #if HAVE_GPGME
 829      char *list_file_name, *sig_file_name, *lists_dir;
 830
 831      /* check to ensure the package has come from a repository */
 832      if (pkg->src)
 833      {
 834        sprintf_alloc (&lists_dir, "%s",
 835                      (conf->restrict_to_default_dest)
 836                       ? conf->default_dest->lists_dir
 837                       : conf->lists_dir);
 838        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 839        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 840
 841        if (file_exists (sig_file_name))
 842        {
 843          if (opkg_verify_file (conf, list_file_name, sig_file_name))
 844            return OPKG_INSTALL_ERR_SIGNATURE;
 845        }
 846
 847        free (lists_dir);
 848        free (list_file_name);
 849        free (sig_file_name);
 850      }
 851      #endif
 852
 853      /* Check for md5 values */
 854      if (pkg->md5sum)
 855      {
 856          file_md5 = file_md5sum_alloc(pkg->local_filename);
 857          if (strcmp(file_md5, pkg->md5sum))
 858          {
 859               opkg_message(conf, OPKG_ERROR,
 860                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 861                            pkg->name);
 862               free(file_md5);
 863               return OPKG_INSTALL_ERR_MD5;
 864          }
 865          free(file_md5);
 866      }
 867
 868      if (pkg->tmp_unpack_dir == NULL) {
 869           unpack_pkg_control_files(conf, pkg);
 870      }
 871
 872      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 873 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 874 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 875      err = update_file_ownership(conf, pkg, old_pkg);
 876      if (err) { return OPKG_ERR_UNKNOWN; }
 877
 878      if (conf->nodeps == 0) {
 879           err = satisfy_dependencies_for(conf, pkg);
 880           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 881      }
 882
 883      replacees = pkg_vec_alloc();
 884      pkg_get_installed_replacees(conf, pkg, replacees);
 885
 886      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 887      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 888      free (pkgid);
 889
 890      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 891      {
 892           sigset_t newset, oldset;
 893           sighandler_t old_handler = NULL;
 894           int use_signal = 0;
 895           caught_sigint = 0;
 896           if (use_signal) {
 897                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 898           } else {
 899                sigemptyset(&newset);
 900                sigaddset(&newset, SIGINT);
 901                sigprocmask(SIG_BLOCK, &newset, &oldset);
 902           }
 903
 904           opkg_state_changed++;
 905           pkg->state_flag |= SF_FILELIST_CHANGED;
 906
 907           /* XXX: BUG: we really should treat replacement more like an upgrade
 908            *      Instead, we're going to remove the replacees
 909            */
 910           err = pkg_remove_installed_replacees(conf, replacees);
 911           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 912
 913           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 914           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 915
 916           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 917           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 918
 919           err = preinst_configure(conf, pkg, old_pkg);
 920           if (err) goto UNWIND_PREINST_CONFIGURE;
 921
 922           err = backup_modified_conffiles(conf, pkg, old_pkg);
 923           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 924
 925           err = check_data_file_clashes(conf, pkg, old_pkg);
 926           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 927
 928           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 929           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 930
 931           if (conf->noaction) return 0;
 932
 933           /* point of no return: no unwinding after this */
 934           if (old_pkg && !conf->force_reinstall) {
 935                old_pkg->state_want = SW_DEINSTALL;
 936
 937                if (old_pkg->state_flag & SF_NOPRUNE) {
 938                     opkg_message(conf, OPKG_INFO,
 939                                  "  not removing obsolesced files because package marked noprune\n");
 940                } else {
 941                     opkg_message(conf, OPKG_INFO,
 942                                  "  removing obsolesced files\n");
 943                     remove_obsolesced_files(conf, pkg, old_pkg);
 944                }
 945                /* removing files from old package, to avoid ghost files */
 946                remove_data_files_and_list(conf, old_pkg);
 947 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 948                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 949                remove_postrm(conf, old_pkg);
 950 /* Pigi */
 951
 952           }
 953
 954
 955           opkg_message(conf, OPKG_INFO,
 956                        "  installing maintainer scripts\n");
 957           install_maintainer_scripts(conf, pkg, old_pkg);
 958
 959           /* the following just returns 0 */
 960           remove_disappeared(conf, pkg);
 961
 962           opkg_message(conf, OPKG_INFO,
 963                        "  installing data files\n");
 964           install_data_files(conf, pkg);
 965
 966 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 967           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 968
 969           opkg_message(conf, OPKG_INFO,
 970                        "  resolving conf files\n");
 971           resolve_conffiles(conf, pkg);
 972
 973           pkg->state_status = SS_UNPACKED;
 974           old_state_flag = pkg->state_flag;
 975           pkg->state_flag &= ~SF_PREFER;
 976           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
 977
 978           if (old_pkg && !conf->force_reinstall) {
 979                old_pkg->state_status = SS_NOT_INSTALLED;
 980           }
 981
 982           time(&pkg->installed_time);
 983
 984           opkg_message(conf, OPKG_INFO,
 985                        "  cleanup temp files\n");
 986           cleanup_temporary_files(conf, pkg);
 987
 988           ab_pkg = pkg->parent;
 989           if (ab_pkg)
 990                ab_pkg->state_status = pkg->state_status;
 991
 992           opkg_message(conf, OPKG_INFO, "Done.\n");
 993
 994           if (use_signal)
 995                signal(SIGINT, old_handler);
 996           else
 997                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
 998           pkg_vec_free (replacees);
 999           return 0;
1000
1001
1002      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1003           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1004      UNWIND_CHECK_DATA_FILE_CLASHES:
1005           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1006      UNWIND_BACKUP_MODIFIED_CONFFILES:
1007           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1008      UNWIND_PREINST_CONFIGURE:
1009           preinst_configure_unwind(conf, pkg, old_pkg);
1010      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1011           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1012      UNWIND_PRERM_UPGRADE_OLD_PKG:
1013           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1014      UNWIND_REMOVE_INSTALLED_REPLACEES:
1015           pkg_remove_installed_replacees_unwind(conf, replacees);
1016
1017           opkg_message(conf, OPKG_INFO,
1018                        "  cleanup temp files\n");
1019           cleanup_temporary_files(conf, pkg);
1020
1021           opkg_message(conf, OPKG_INFO,
1022                        "Failed.\n");
1023           if (use_signal)
1024                signal(SIGINT, old_handler);
1025           else
1026                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1027
1028           pkg_vec_free (replacees);
1029           return OPKG_ERR_UNKNOWN;
1030      }
1031      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1032 }
1033
1034 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1035 {
1036      /* DPKG_INCOMPATIBILITY:
1037         dpkg does some things here that we don't do yet. Do we care?
1038
1039         1. If a version of the package is already installed, call
1040            old-prerm upgrade new-version
1041         2. If the script runs but exits with a non-zero exit status
1042            new-prerm failed-upgrade old-version
1043            Error unwind, for both the above cases:
1044            old-postinst abort-upgrade new-version
1045      */
1046      return 0;
1047 }
1048
1049 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1050 {
1051      /* DPKG_INCOMPATIBILITY:
1052         dpkg does some things here that we don't do yet. Do we care?
1053         (See prerm_upgrade_old_package for details)
1054      */
1055      return 0;
1056 }
1057
1058 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1059 {
1060      /* DPKG_INCOMPATIBILITY:
1061         dpkg does some things here that we don't do yet. Do we care?
1062         2. If a 'conflicting' package is being removed at the same time:
1063                 1. If any packages depended on that conflicting package and
1064                    --auto-deconfigure is specified, call, for each such package:
1065                    deconfigured's-prerm deconfigure \
1066                    in-favour package-being-installed version \
1067                    removing conflicting-package version
1068                 Error unwind:
1069                    deconfigured's-postinst abort-deconfigure \
1070                    in-favour package-being-installed-but-failed version \
1071                    removing conflicting-package version
1072
1073                    The deconfigured packages are marked as requiring
1074                    configuration, so that if --install is used they will be
1075                    configured again if possible.
1076                 2. To prepare for removal of the conflicting package, call:
1077                    conflictor's-prerm remove in-favour package new-version
1078                 Error unwind:
1079                    conflictor's-postinst abort-remove in-favour package new-version
1080      */
1081      return 0;
1082 }
1083
1084 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1085 {
1086      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1087         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1088         details) */
1089      return 0;
1090 }
1091
1092 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1093 {
1094      int err;
1095      char *preinst_args;
1096
1097      if (old_pkg) {
1098           char *old_version = pkg_version_str_alloc(old_pkg);
1099           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1100           free(old_version);
1101      } else if (pkg->state_status == SS_CONFIG_FILES) {
1102           char *pkg_version = pkg_version_str_alloc(pkg);
1103           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1104           free(pkg_version);
1105      } else {
1106           preinst_args = strdup("install");
1107      }
1108
1109      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1110      if (err) {
1111           opkg_message(conf, OPKG_ERROR,
1112                        "Aborting installation of %s\n", pkg->name);
1113           return 1;
1114      }
1115
1116      free(preinst_args);
1117
1118      return 0;
1119 }
1120
1121 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1122 {
1123      /* DPKG_INCOMPATIBILITY:
1124         dpkg does the following error unwind, should we?
1125         pkg->postrm abort-upgrade old-version
1126         OR pkg->postrm abort-install old-version
1127         OR pkg->postrm abort-install
1128      */
1129      return 0;
1130 }
1131
1132 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1133 {
1134      int err;
1135      conffile_list_elt_t *iter;
1136      conffile_t *cf;
1137
1138      if (conf->noaction) return 0;
1139
1140      /* Backup all modified conffiles */
1141      if (old_pkg) {
1142           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1143                char *cf_name;
1144
1145                cf = iter->data;
1146                cf_name = root_filename_alloc(conf, cf->name);
1147
1148                /* Don't worry if the conffile is just plain gone */
1149                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1150                     err = backup_make_backup(conf, cf_name);
1151                     if (err) {
1152                          return err;
1153                     }
1154                }
1155                free(cf_name);
1156           }
1157      }
1158
1159      /* Backup all conffiles that were not conffiles in old_pkg */
1160      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1161           char *cf_name;
1162           cf = iter->data;
1163           cf_name = root_filename_alloc(conf, cf->name);
1164           /* Ignore if this was a conffile in old_pkg as well */
1165           if (pkg_get_conffile(old_pkg, cf->name)) {
1166                continue;
1167           }
1168
1169           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1170                err = backup_make_backup(conf, cf_name);
1171                if (err) {
1172                     return err;
1173                }
1174           }
1175           free(cf_name);
1176      }
1177
1178      return 0;
1179 }
1180
1181 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1182 {
1183      conffile_list_elt_t *iter;
1184
1185      if (old_pkg) {
1186           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1187                backup_remove(iter->data->name);
1188           }
1189      }
1190
1191      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1192           backup_remove(iter->data->name);
1193      }
1194
1195      return 0;
1196 }
1197
1198
1199 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1200 {
1201      /* DPKG_INCOMPATIBILITY:
1202         opkg takes a slightly different approach than dpkg at this
1203         point.  dpkg installs each file in the new package while
1204         creating a backup for any file that is replaced, (so that it
1205         can unwind if necessary).  To avoid complexity and redundant
1206         storage, opkg doesn't do any installation until later, (at the
1207         point at which dpkg removes the backups.
1208
1209         But, we do have to check for data file clashes, since after
1210         installing a package with a file clash, removing either of the
1211         packages involved in the clash has the potential to break the
1212         other package.
1213      */
1214      str_list_t *files_list;
1215      str_list_elt_t *iter;
1216
1217      int clashes = 0;
1218
1219      files_list = pkg_get_installed_files(pkg);
1220      for (iter = files_list->head; iter; iter = iter->next) {
1221           char *root_filename;
1222           char *filename = iter->data;
1223           root_filename = root_filename_alloc(conf, filename);
1224           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1225                pkg_t *owner;
1226                pkg_t *obs;
1227                /* Pre-existing conffiles are OK */
1228                /* @@@@ should have way to check that it is a conffile -Jamey */
1229                if (backup_exists_for(root_filename)) {
1230                     continue;
1231                }
1232
1233                /* Pre-existing files are OK if force-overwrite was asserted. */
1234                if (conf->force_overwrite) {
1235                     /* but we need to change who owns this file */
1236                     file_hash_set_file_owner(conf, filename, pkg);
1237                     continue;
1238                }
1239
1240                owner = file_hash_get_file_owner(conf, filename);
1241
1242                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1243                if (owner && old_pkg) {
1244                     if (strcmp(owner->name, old_pkg->name) == 0) {
1245                          continue;
1246                     }
1247                }
1248
1249                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1250                if (owner) {
1251                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1252                     if (pkg_replaces(pkg, owner)) {
1253                          continue;
1254                     }
1255 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1256    then it's ok to overwrite. */
1257                     if (strcmp(owner->name,pkg->name)==0){
1258                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1259                          continue;
1260                     }
1261                }
1262
1263                /* Pre-existing files are OK if they are obsolete */
1264                obs = hash_table_get(&conf->obs_file_hash, filename);
1265                if (obs) {
1266                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1267                     continue;
1268                }
1269
1270                /* We have found a clash. */
1271                opkg_message(conf, OPKG_ERROR,
1272                             "Package %s wants to install file %s\n"
1273                             "\tBut that file is already provided by package ",
1274                             pkg->name, filename);
1275                if (owner) {
1276                     opkg_message(conf, OPKG_ERROR,
1277                                  "%s\n", owner->name);
1278                } else {
1279                     opkg_message(conf, OPKG_ERROR,
1280                                  "<no package>\nPlease move this file out of the way and try again.\n");
1281                }
1282                clashes++;
1283           }
1284           free(root_filename);
1285      }
1286      pkg_free_installed_files(pkg);
1287
1288      return clashes;
1289 }
1290
1291 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1292 {
1293     /* Basically that's the worst hack I could do to be able to change ownership of
1294        file list, but, being that we have no way to unwind the mods, due to structure
1295        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1296        What we do here is change the ownership of file in hash if a replace ( or similar events
1297        happens )
1298        Only the action that are needed to change name should be considered.
1299        @@@ To change after 1.0 release.
1300      */
1301      str_list_t *files_list;
1302      str_list_elt_t *iter;
1303
1304      int clashes = 0;
1305
1306      files_list = pkg_get_installed_files(pkg);
1307      for (iter = files_list->head; iter; iter = iter->next) {
1308           char *root_filename;
1309           char *filename = iter->data;
1310           root_filename = root_filename_alloc(conf, filename);
1311           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1312                pkg_t *owner;
1313
1314                if (conf->force_overwrite) {
1315                     /* but we need to change who owns this file */
1316                     file_hash_set_file_owner(conf, filename, pkg);
1317                     continue;
1318                }
1319
1320                owner = file_hash_get_file_owner(conf, filename);
1321
1322                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1323                if (owner) {
1324                     if (pkg_replaces(pkg, owner)) {
1325 /* It's now time to change the owner of that file.
1326    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1327                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1328                          file_hash_set_file_owner(conf, filename, pkg);
1329                          continue;
1330                     }
1331                }
1332
1333           }
1334           free(root_filename);
1335      }
1336      pkg_free_installed_files(pkg);
1337
1338      return clashes;
1339 }
1340
1341 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1342 {
1343      /* Nothing to do since check_data_file_clashes doesn't change state */
1344      return 0;
1345 }
1346
1347 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1348 {
1349      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1350         1. If the package is being upgraded, call
1351            old-postrm upgrade new-version
1352         2. If this fails, attempt:
1353            new-postrm failed-upgrade old-version
1354         Error unwind, for both cases:
1355            old-preinst abort-upgrade new-version    */
1356      return 0;
1357 }
1358
1359 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1360 {
1361      /* DPKG_INCOMPATIBILITY:
1362         dpkg does some things here that we don't do yet. Do we care?
1363         (See postrm_upgrade_old_pkg for details)
1364      */
1365     return 0;
1366 }
1367
1368 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1369 {
1370      int err;
1371      str_list_t *old_files;
1372      str_list_elt_t *of;
1373      str_list_t *new_files;
1374      str_list_elt_t *nf;
1375
1376      if (old_pkg == NULL) {
1377           return 0;
1378      }
1379
1380      old_files = pkg_get_installed_files(old_pkg);
1381      new_files = pkg_get_installed_files(pkg);
1382
1383      for (of = old_files->head; of; of = of->next) {
1384           pkg_t *owner;
1385           char *old, *new;
1386           old = of->data;
1387           for (nf = new_files->head; nf; nf = nf->next) {
1388                new = nf->data;
1389                if (strcmp(old, new) == 0) {
1390                     goto NOT_OBSOLETE;
1391                }
1392           }
1393           if (file_is_dir(old)) {
1394                continue;
1395           }
1396           owner = file_hash_get_file_owner(conf, old);
1397           if (owner != old_pkg) {
1398                /* in case obsolete file no longer belongs to old_pkg */
1399                continue;
1400           }
1401
1402           /* old file is obsolete */
1403           opkg_message(conf, OPKG_INFO,
1404                        "    removing obsolete file %s\n", old);
1405           if (!conf->noaction) {
1406                err = unlink(old);
1407                if (err) {
1408                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1409                                  strerror(errno));
1410                }
1411           }
1412
1413      NOT_OBSOLETE:
1414           ;
1415      }
1416
1417      pkg_free_installed_files(old_pkg);
1418      pkg_free_installed_files(pkg);
1419
1420      return 0;
1421 }
1422
1423 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1424 {
1425      int i;
1426      int err = 0;
1427      char *globpattern;
1428      glob_t globbuf;
1429      if (0) {
1430           if (!pkg->dest) {
1431                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1432                return -1;
1433           }
1434           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1435           err = glob(globpattern, 0, NULL, &globbuf);
1436           free(globpattern);
1437           if (err) {
1438                return err;
1439           }
1440           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1441           for (i = 0; i < globbuf.gl_pathc; i++) {
1442                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1443                             globbuf.gl_pathv[i], old_pkg->name);
1444                if (!conf->noaction)
1445                     unlink(globbuf.gl_pathv[i]);
1446           }
1447           globfree(&globbuf);
1448      }
1449      return err;
1450 }
1451
1452 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1453 {
1454      int ret;
1455      char *prefix;
1456
1457      if (old_pkg)
1458           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1459      sprintf_alloc(&prefix, "%s.", pkg->name);
1460      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1461                                                         pkg->dest->info_dir,
1462                                                         prefix);
1463      free(prefix);
1464      return ret;
1465 }
1466
1467 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1468 {
1469      /* DPKG_INCOMPATIBILITY:
1470         This is a fairly sophisticated dpkg operation. Shall we
1471         skip it? */
1472
1473      /* Any packages all of whose files have been overwritten during the
1474         installation, and which aren't required for dependencies, are
1475         considered to have been removed. For each such package
1476         1. disappearer's-postrm disappear overwriter overwriter-version
1477         2. The package's maintainer scripts are removed
1478         3. It is noted in the status database as being in a sane state,
1479            namely not installed (any conffiles it may have are ignored,
1480            rather than being removed by dpkg). Note that disappearing
1481            packages do not have their prerm called, because dpkg doesn't
1482            know in advance that the package is going to vanish.
1483      */
1484      return 0;
1485 }
1486
1487 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1488 {
1489      int err;
1490
1491      /* opkg takes a slightly different approach to data file backups
1492         than dpkg. Rather than removing backups at this point, we
1493         actually do the data file installation now. See comments in
1494         check_data_file_clashes() for more details. */
1495
1496      opkg_message(conf, OPKG_INFO,
1497                   "    extracting data files to %s\n", pkg->dest->root_dir);
1498      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1499      if (err) {
1500           return err;
1501      }
1502
1503      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1504         so we can't save ourself from removing important packages
1505         At this point we (should) have extracted the .control file, so it
1506         would be a good idea to reload the data in it, and set the Essential
1507         state in *pkg. From now on the Essential is back in status file and
1508         we can protect again.
1509         We should operate this way:
1510         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1511         check for "Essential" in it
1512         set the value in pkg->essential.
1513         This new routine could be useful also for every other flag
1514         Pigi: 16/03/2004 */
1515      set_flags_from_control(conf, pkg) ;
1516
1517      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1518      err = pkg_write_filelist(conf, pkg);
1519      if (err)
1520           return err;
1521
1522      /* XXX: FEATURE: opkg should identify any files which existed
1523         before installation and which were overwritten, (see
1524         check_data_file_clashes()). What it must do is remove any such
1525         files from the filelist of the old package which provided the
1526         file. Otherwise, if the old package were removed at some point
1527         it would break the new package. Removing the new package will
1528         also break the old one, but this cannot be helped since the old
1529         package's file has already been deleted. This is the importance
1530         of check_data_file_clashes(), and only allowing opkg to install
1531         a clashing package with a user force. */
1532
1533      return 0;
1534 }
1535
1536 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1537 {
1538      conffile_list_elt_t *iter;
1539      conffile_t *cf;
1540      char *cf_backup;
1541
1542     char *md5sum;
1543
1544
1545      if (conf->noaction) return 0;
1546
1547      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1548           char *root_filename;
1549           cf = iter->data;
1550           root_filename = root_filename_alloc(conf, cf->name);
1551
1552           /* Might need to initialize the md5sum for each conffile */
1553           if (cf->value == NULL) {
1554                cf->value = file_md5sum_alloc(root_filename);
1555           }
1556
1557           if (!file_exists(root_filename)) {
1558                free(root_filename);
1559                continue;
1560           }
1561
1562           cf_backup = backup_filename_alloc(root_filename);
1563
1564
1565           if (file_exists(cf_backup)) {
1566  /* Let's compute md5 to test if files are changed */
1567               md5sum = file_md5sum_alloc(cf_backup);
1568                if (strcmp( cf->value,md5sum) != 0 ) {
1569                   if (conf->force_defaults
1570                       || user_prefers_old_conffile(cf->name, cf_backup) ) {
1571                        rename(cf_backup, root_filename);
1572                   }
1573                }
1574                unlink(cf_backup);
1575                free(md5sum);
1576           }
1577
1578           free(cf_backup);
1579           free(root_filename);
1580      }
1581
1582      return 0;
1583 }
1584
1585 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1586 {
1587      char *response;
1588      const char *short_file_name;
1589
1590      short_file_name = strrchr(file_name, '/');
1591      if (short_file_name) {
1592           short_file_name++;
1593      } else {
1594           short_file_name = file_name;
1595      }
1596
1597      while (1) {
1598           response = get_user_response("    Configuration file '%s'\n"
1599                                        "    ==> File on system created by you or by a script.\n"
1600                                        "    ==> File also in package provided by package maintainer.\n"
1601                                        "       What would you like to do about it ?  Your options are:\n"
1602                                        "        Y or I  : install the package maintainer's version\n"
1603                                        "        N or O  : keep your currently-installed version\n"
1604                                        "          D     : show the differences between the versions (if diff is installed)\n"
1605                                        "     The default action is to keep your current version.\n"
1606                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1607           if (strcmp(response, "y") == 0
1608               || strcmp(response, "i") == 0
1609               || strcmp(response, "yes") == 0) {
1610                free(response);
1611                return 0;
1612           }
1613
1614           if (strcmp(response, "d") == 0) {
1615                char *cmd;
1616
1617                free(response);
1618                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1619                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1620                xsystem(cmd);
1621                free(cmd);
1622                printf("    [Press ENTER to continue]\n");
1623                response = file_read_line_alloc(stdin);
1624                free(response);
1625                continue;
1626           }
1627
1628           free(response);
1629           return 1;
1630      }
1631 }
1632
1633 /* XXX: CLEANUP: I'd like to move all of the code for
1634    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1635    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1636    pkg_deinit for example). */
1637 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1638 {
1639      DIR *tmp_dir;
1640      struct dirent *dirent;
1641      char *tmp_file;
1642
1643 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1644 #error
1645      opkg_message(conf, OPKG_DEBUG,
1646                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1647                   __FUNCTION__, pkg->tmp_unpack_dir);
1648      return 0;
1649 #endif
1650
1651      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1652           tmp_dir = opendir(pkg->tmp_unpack_dir);
1653           if (tmp_dir) {
1654                while (1) {
1655                     dirent = readdir(tmp_dir);
1656                     if (dirent == NULL) {
1657                          break;
1658                     }
1659                     sprintf_alloc(&tmp_file, "%s/%s",
1660                                   pkg->tmp_unpack_dir, dirent->d_name);
1661                     if (! file_is_dir(tmp_file)) {
1662                          unlink(tmp_file);
1663                     }
1664                     free(tmp_file);
1665                }
1666                closedir(tmp_dir);
1667                rmdir(pkg->tmp_unpack_dir);
1668                free(pkg->tmp_unpack_dir);
1669                pkg->tmp_unpack_dir = NULL;
1670           }
1671      }
1672
1673      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1674                   pkg->name, pkg->local_filename, conf->tmp_dir);
1675      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1676           unlink(pkg->local_filename);
1677           free(pkg->local_filename);
1678           pkg->local_filename = NULL;
1679      }
1680
1681      return 0;
1682 }
1683
1684 static char *backup_filename_alloc(const char *file_name)
1685 {
1686      char *backup;
1687
1688      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1689
1690      return backup;
1691 }
1692
1693 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1694 {
1695      int err;
1696      char *backup;
1697
1698      backup = backup_filename_alloc(file_name);
1699      err = file_copy(file_name, backup);
1700      if (err) {
1701           opkg_message(conf, OPKG_ERROR,
1702                        "%s: Failed to copy %s to %s\n",
1703                        __FUNCTION__, file_name, backup);
1704      }
1705
1706      free(backup);
1707
1708      return err;
1709 }
1710
1711 static int backup_exists_for(const char *file_name)
1712 {
1713      int ret;
1714      char *backup;
1715
1716      backup = backup_filename_alloc(file_name);
1717
1718      ret = file_exists(backup);
1719
1720      free(backup);
1721
1722      return ret;
1723 }
1724
1725 static int backup_remove(const char *file_name)
1726 {
1727      char *backup;
1728
1729      backup = backup_filename_alloc(file_name);
1730      unlink(backup);
1731      free(backup);
1732
1733      return 0;
1734 }
1735