+/*
+ * Test error() and error_at_line(). Non-standard, GNU only.
+ *
+ * Copyright (C) 2013 Simon Ruderich
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define _GNU_SOURCE /* for program_invocation_name */
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <error.h>
+
+void (*error_print_progname)(void);
+
+
+static void print_prognmae(void) {
+ fprintf(stderr, "PROG");
+}
+
+
+int main(int argc, char **argv) {
+ program_invocation_name = "./example_error";
+
+ error(0, 0, "<message>");
+ error_at_line(0, 0, "file", 42, "<message>");
+
+ error(0, ENOMEM, "<message>");
+ error_at_line(0, ENOMEM, "file", 42, "<message>");
+ error_at_line(0, ENOMEM, "file", 42, "<message>");
+
+ error_print_progname = print_prognmae;
+ error_one_per_line = 1;
+
+ error(0, 0, "<message>");
+ error_at_line(0, 0, "file", 42, "<message>");
+
+ error(0, ENOMEM, "<message>");
+ error_at_line(0, ENOMEM, "file", 42, "<message>");
+ error_at_line(0, ENOMEM, "file", 42, "<message>");
+
+ /* Exit codes are not tested. */
+
+ return EXIT_SUCCESS;
+}