libopkg/opkg_upgrade.c

   1 /* opkg_upgrade.c - the opkg package management system
   2
   3    Carl D. Worth
   4    Copyright (C) 2001 University of Southern California
   5
   6    Copyright (C) 2003 Daniele Nicolodi <daniele@grinta.net>
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17 */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21
  22 #include "opkg_install.h"
  23 #include "opkg_upgrade.h"
  24 #include "opkg_message.h"
  25
  26 int opkg_upgrade_pkg(pkg_t * old)
  27 {
  28         pkg_t *new;
  29         int cmp;
  30         char *old_version, *new_version;
  31
  32         if (old->state_flag & SF_HOLD) {
  33                 opkg_msg(NOTICE, "Not upgrading package %s which is marked "
  34                          "hold (flags=%#x).\n", old->name, old->state_flag);
  35                 return 0;
  36         }
  37
  38         new = pkg_hash_fetch_best_installation_candidate_by_name(old->name);
  39         if (new == NULL) {
  40                 old_version = pkg_version_str_alloc(old);
  41                 opkg_msg(NOTICE, "Assuming locally installed package %s (%s) "
  42                          "is up to date.\n", old->name, old_version);
  43                 free(old_version);
  44                 return 0;
  45         }
  46
  47         old_version = pkg_version_str_alloc(old);
  48         new_version = pkg_version_str_alloc(new);
  49
  50         cmp = pkg_compare_versions(old, new);
  51         opkg_msg(DEBUG, "Comparing visible versions of pkg %s:"
  52                  "\n\t%s is installed "
  53                  "\n\t%s is available "
  54                  "\n\t%d was comparison result\n",
  55                  old->name, old_version, new_version, cmp);
  56         if (cmp == 0) {
  57                 opkg_msg(INFO,
  58                          "Package %s (%s) installed in %s is up to date.\n",
  59                          old->name, old_version, old->dest->name);
  60                 free(old_version);
  61                 free(new_version);
  62                 return 0;
  63         } else if (cmp > 0) {
  64                 opkg_msg(NOTICE,
  65                          "Not downgrading package %s on %s from %s to %s.\n",
  66                          old->name, old->dest->name, old_version, new_version);
  67                 free(old_version);
  68                 free(new_version);
  69                 return 0;
  70         } else if (cmp < 0) {
  71                 new->dest = old->dest;
  72                 old->state_want = SW_DEINSTALL;
  73         }
  74
  75         free(old_version);
  76         free(new_version);
  77         new->state_flag |= SF_USER;
  78         return opkg_install_pkg(new, 1);
  79 }
  80
  81 static void
  82 pkg_hash_check_installed_pkg_helper(const char *pkg_name, void *entry,
  83                                     void *data)
  84 {
  85         struct active_list *head = (struct active_list *)data;
  86         abstract_pkg_t *ab_pkg = (abstract_pkg_t *) entry;
  87         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
  88         int j;
  89
  90         if (!pkg_vec)
  91                 return;
  92
  93         for (j = 0; j < pkg_vec->len; j++) {
  94                 pkg_t *pkg = pkg_vec->pkgs[j];
  95                 if (pkg->state_status == SS_INSTALLED
  96                     || pkg->state_status == SS_UNPACKED)
  97                         active_list_add(head, &pkg->list);
  98         }
  99 }
 100
 101 struct active_list *prepare_upgrade_list(void)
 102 {
 103         struct active_list *head = active_list_head_new();
 104         struct active_list *all = active_list_head_new();
 105         struct active_list *node = NULL;
 106
 107         /* ensure all data is valid */
 108         pkg_info_preinstall_check();
 109
 110         hash_table_foreach(&conf->pkg_hash, pkg_hash_check_installed_pkg_helper,
 111                            all);
 112         for (node = active_list_next(all, all); node;
 113              node = active_list_next(all, node)) {
 114                 pkg_t *old, *new;
 115                 int cmp;
 116
 117                 old = list_entry(node, pkg_t, list);
 118                 new =
 119                     pkg_hash_fetch_best_installation_candidate_by_name(old->
 120                                                                        name);
 121
 122                 if (new == NULL)
 123                         continue;
 124
 125                 cmp = pkg_compare_versions(old, new);
 126
 127                 if (cmp < 0) {
 128                         node = active_list_move_node(all, head, &old->list);
 129                 }
 130         }
 131         active_list_head_delete(all);
 132         return head;
 133 }