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authorDan McGee <dan@archlinux.org>2011-08-19 11:06:55 -0500
committerDan McGee <dan@archlinux.org>2011-08-19 11:09:57 -0500
commit6d544984f2418ea34caab4c433580487b760362a (patch)
treecf0510b97a6495587c87598a70bf8761189f5c32 /lib/libalpm/deps.c
parent9934b3bd345011eef6a96249d8d90de594c04cd0 (diff)
downloadpacman-6d544984f2418ea34caab4c433580487b760362a.tar.xz
Be more robust when copying package data
This changes the signature of _alpm_pkg_dup() to return an integer error code and provide the new package in a passed pointer argument. All callers are now more robust with checking the return value of this function to ensure a fatal error did not occur. We allow load failures to proceed as otherwise we have a chicken and egg problem- if a 'desc' local database entry is missing, the best way of restoring said file is `pacman -Sf --dbonly packagename`. This patch fixes a segfault that was occurring in this case. Fixes the segfault reported in FS#25667. Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/deps.c')
-rw-r--r--lib/libalpm/deps.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 704a9046..47b7637a 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -512,13 +512,14 @@ static int can_remove_package(alpm_db_t *db, alpm_pkg_t *pkg,
* @param db package database to do dependency tracing in
* @param *targs pointer to a list of packages
* @param include_explicit if 0, explicitly installed packages are not included
+ * @return 0 on success, -1 on errors
*/
-void _alpm_recursedeps(alpm_db_t *db, alpm_list_t *targs, int include_explicit)
+int _alpm_recursedeps(alpm_db_t *db, alpm_list_t *targs, int include_explicit)
{
alpm_list_t *i, *j;
if(db == NULL || targs == NULL) {
- return;
+ return -1;
}
for(i = targs; i; i = i->next) {
@@ -527,13 +528,18 @@ void _alpm_recursedeps(alpm_db_t *db, alpm_list_t *targs, int include_explicit)
alpm_pkg_t *deppkg = j->data;
if(_alpm_dep_edge(pkg, deppkg)
&& can_remove_package(db, deppkg, targs, include_explicit)) {
+ alpm_pkg_t *copy;
_alpm_log(db->handle, ALPM_LOG_DEBUG, "adding '%s' to the targets\n",
deppkg->name);
/* add it to the target list */
- targs = alpm_list_add(targs, _alpm_pkg_dup(deppkg));
+ if(_alpm_pkg_dup(deppkg, &copy)) {
+ return -1;
+ }
+ targs = alpm_list_add(targs, copy);
}
}
}
+ return 0;
}
/**