cli: return non-zero status on errors

cli.c

@@ -258,6 +258,7 @@ static int package_cmd(int cmd, char *tuple)
 {
 	struct uci_element *e = NULL;
 	struct uci_ptr ptr;
+	int ret = 0;
 
 	if (uci_lookup_ptr(ctx, &ptr, tuple, true) != UCI_OK) {
 		cli_perror();
@@ -272,8 +273,10 @@ static int package_cmd(int cmd, char *tuple)
 	case CMD_COMMIT:
 		if (flags & CLI_FLAG_NOCOMMIT)
 			return 0;
-		if (uci_commit(ctx, &ptr.p, false) != UCI_OK)
+		if (uci_commit(ctx, &ptr.p, false) != UCI_OK) {
 			cli_perror();
+			ret = 1;
+		}
 		break;
 	case CMD_EXPORT:
 		uci_export(ctx, stdout, ptr.p, true);
@@ -282,7 +285,7 @@ static int package_cmd(int cmd, char *tuple)
 		if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
 			ctx->err = UCI_ERR_NOTFOUND;
 			cli_perror();
-			return 1;
+			ret = 1;
 		}
 		switch(e->type) {
 			case UCI_TYPE_PACKAGE:
@@ -301,8 +304,9 @@ static int package_cmd(int cmd, char *tuple)
 		break;
 	}
 
-	uci_unload(ctx, ptr.p);
-	return 0;
+	if (ptr.p)
+		uci_unload(ctx, ptr.p);
+	return ret;
 }
 
 static int uci_do_import(int argc, char **argv)