remote-helper: check helper status after import/export

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>

t/t5801-remote-helpers.sh

@@ -262,7 +262,7 @@ test_expect_success 'push update refs failure' '
 	echo "update fail" >>file &&
 	git commit -a -m "update fail" &&
 	git rev-parse --verify testgit/origin/heads/update >expect &&
-	test_expect_code 1 env GIT_REMOTE_TESTGIT_FAILURE="non-fast forward" \
+	test_must_fail env GIT_REMOTE_TESTGIT_FAILURE="non-fast forward" \
 		git push origin update &&
 	git rev-parse --verify testgit/origin/heads/update >actual &&
 	test_cmp expect actual

transport-helper.c

@@ -494,6 +494,19 @@ static int get_exporter(struct transport *transport,
 	return start_command(fastexport);
 }
 
+static void check_helper_status(struct helper_data *data)
+{
+	int pid, status;
+
+	pid = waitpid(data->helper->pid, &status, WNOHANG);
+	if (pid < 0)
+		die("Could not retrieve status of remote helper '%s'",
+		    data->name);
+	if (pid > 0 && WIFEXITED(status))
+		die("Remote helper '%s' died with %d",
+		    data->name, WEXITSTATUS(status));
+}
+
 static int fetch_with_import(struct transport *transport,
 			     int nr_heads, struct ref **to_fetch)
 {
@@ -530,6 +543,7 @@ static int fetch_with_import(struct transport *transport,
 
 	if (finish_command(&fastimport))
 		die(_("error while running fast-import"));
+	check_helper_status(data);
 
 	/*
 	 * The fast-import stream of a remote helper that advertises
@@ -1142,6 +1156,7 @@ static int push_refs_with_export(struct transport *transport,
 
 	if (finish_command(&exporter))
 		die(_("error while running fast-export"));
+	check_helper_status(data);
 	if (push_update_refs_status(data, remote_refs, flags))
 		return 1;