Lock the database on -Sc operation.

This partly fixes FS#9609.

Weird things could happen when running -Sc while another instance was
already running. The cleancache function could delete packages that were
just being downloaded.

Signed-off-by: Chantry Xavier <shiningxc@gmail.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index 5f83c753..e3e87703 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -774,8 +774,19 @@ int pacman_sync(alpm_list_t *targets)
 
 	/* clean the cache */
 	if(config->op_s_clean) {
-		int ret = sync_cleancache(config->op_s_clean);
+		int ret = 0;
+
+		if(sync_trans_init(0) == -1) {
+			return(1);
+		}
+
+		ret += sync_cleancache(config->op_s_clean);
 		ret += sync_cleandb_all();
+
+		if(sync_trans_release() == -1) {
+			ret++;
+		}
+
 		return(ret);
 	}