1 files changed, 77 insertions, 0 deletions
diff --git a/ipkg_upgrade.c b/ipkg_upgrade.c
new file mode 100644
index 0000000..4ae4714
--- /dev/null
+++ b/ipkg_upgrade.c
@@ -0,0 +1,77 @@
+/* ipkg_upgrade.c - the itsy package management system
+
+   Carl D. Worth
+   Copyright (C) 2001 University of Southern California
+
+   Copyright (C) 2003 Daniele Nicolodi <daniele@grinta.net>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+*/
+
+#include "ipkg.h"
+#include "ipkg_install.h"
+#include "ipkg_message.h"
+
+int ipkg_upgrade_pkg(ipkg_conf_t *conf, pkg_t *old)
+{
+     pkg_t *new;
+     int cmp;
+     char *old_version, *new_version;
+
+     if (old->state_flag & SF_HOLD) {
+          ipkg_message(conf, IPKG_NOTICE,
+                       "Not upgrading package %s which is marked "
+                       "hold (flags=%#x)\n", old->name, old->state_flag);
+          return 0;
+     }
+
+     new = pkg_hash_fetch_best_installation_candidate_by_name(conf, old->name);
+     if (new == NULL) {
+          old_version = pkg_version_str_alloc(old);
+          ipkg_message(conf, IPKG_NOTICE,
+                       "Assuming locally installed package %s (%s) "
+                       "is up to date.\n", old->name, old_version);
+          free(old_version);
+          return 0;
+     }
+          
+     old_version = pkg_version_str_alloc(old);
+     new_version = pkg_version_str_alloc(new);
+               
+     cmp = pkg_compare_versions(old, new);
+     ipkg_message(conf, IPKG_DEBUG,
+                  "comparing visible versions of pkg %s:"
+                  "\n\t%s is installed "
+                  "\n\t%s is available "
+                  "\n\t%d was comparison result\n",
+                  old->name, old_version, new_version, cmp);
+     if (cmp == 0) {
+          ipkg_message(conf, IPKG_INFO,
+                       "Package %s (%s) installed in %s is up to date.\n",
+                       old->name, old_version, old->dest->name);
+          free(old_version);
+          free(new_version);
+          return 0;
+     } else if (cmp > 0) {
+          ipkg_message(conf, IPKG_NOTICE,
+                       "Not downgrading package %s on %s from %s to %s.\n",
+                       old->name, old->dest->name, old_version, new_version);
+          free(old_version);
+          free(new_version);
+          return 0;
+     } else if (cmp < 0) {
+          new->dest = old->dest;
+          old->state_want = SW_DEINSTALL;
+     }
+
+     new->state_flag |= SF_USER;
+     return ipkg_install_pkg(conf, new,1);
+}