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