properly handle return codes

[project/fstools.git] / libfstools / snapshot.c

diff --git a/libfstools/snapshot.c b/libfstools/snapshot.c
index 1ec7b87..936f2af 100644 (file)
--- a/libfstools/snapshot.c
+++ b/libfstools/snapshot.c
@@ -329,13 +329,19 @@ mount_snapshot(struct volume *v)
        snapshot_sync(v);
        setenv("SNAPSHOT", "magic", 1);
        _ramoverlay("/rom", "/overlay");
-       system("/sbin/snapshot unpack");
+       if (system("/sbin/snapshot unpack") == -1) {
+               perror("system");
+               return -1;
+       }
        foreachdir("/overlay/", handle_whiteout);
        mkdir("/volatile", 0700);
        _ramoverlay("/rom", "/volatile");
        mount_move("/rom/volatile", "/volatile", "");
        mount_move("/rom/rom", "/rom", "");
-       system("/sbin/snapshot config_unpack");
+       if (system("/sbin/snapshot config_unpack")) {
+               perror("system");
+               return -1;
+       }
        foreachdir("/volatile/", handle_whiteout);
        unsetenv("SNAPSHOT");
        return -1;