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-rw-r--r--lib/libalpm/util.c32
1 files changed, 24 insertions, 8 deletions
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 1bec6344..75f6042d 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -288,19 +288,21 @@ int _alpm_lckrm()
* @param archive the archive to unpack
* @param prefix where to extract the files
* @param fn a file within the archive to unpack or NULL for all
+ * @return 0 on success, 1 on failure
*/
int _alpm_unpack(const char *archive, const char *prefix, const char *fn)
{
- int ret = 1;
+ int ret = 0;
mode_t oldmask;
struct archive *_archive;
struct archive_entry *entry;
- char expath[PATH_MAX];
+ char cwd[PATH_MAX];
+ int restore_cwd = 0;
ALPM_LOG_FUNC;
if((_archive = archive_read_new()) == NULL)
- RET_ERR(PM_ERR_LIBARCHIVE, -1);
+ RET_ERR(PM_ERR_LIBARCHIVE, 1);
archive_read_support_compression_all(_archive);
archive_read_support_format_all(_archive);
@@ -309,10 +311,25 @@ int _alpm_unpack(const char *archive, const char *prefix, const char *fn)
ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
_alpm_log(PM_LOG_ERROR, _("could not open %s: %s\n"), archive,
archive_error_string(_archive));
- RET_ERR(PM_ERR_PKG_OPEN, -1);
+ RET_ERR(PM_ERR_PKG_OPEN, 1);
}
oldmask = umask(0022);
+
+ /* save the cwd so we can restore it later */
+ if(getcwd(cwd, PATH_MAX) == NULL) {
+ _alpm_log(PM_LOG_ERROR, _("could not get current working directory\n"));
+ } else {
+ restore_cwd = 1;
+ }
+
+ /* just in case our cwd was removed in the upgrade operation */
+ if(chdir(prefix) != 0) {
+ _alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), prefix, strerror(errno));
+ ret = 1;
+ goto cleanup;
+ }
+
while(archive_read_next_header(_archive, &entry) == ARCHIVE_OK) {
const struct stat *st;
const char *entryname; /* the name of the file in the archive */
@@ -337,10 +354,6 @@ int _alpm_unpack(const char *archive, const char *prefix, const char *fn)
}
/* Extract the archive entry. */
- ret = 0;
- snprintf(expath, PATH_MAX, "%s/%s", prefix, entryname);
- archive_entry_set_pathname(entry, expath);
-
int readret = archive_read_extract(_archive, entry, 0);
if(readret == ARCHIVE_WARN) {
/* operation succeeded but a non-critical error was encountered */
@@ -361,6 +374,9 @@ int _alpm_unpack(const char *archive, const char *prefix, const char *fn)
cleanup:
umask(oldmask);
archive_read_finish(_archive);
+ if(restore_cwd) {
+ chdir(cwd);
+ }
return(ret);
}