From bc44ba7128b38d16455899acaa145daa2eb6aade Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 1 Mar 2023 16:13:11 +0000
Subject: [PATCH] networkctl: Add some help and version arguments

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/networkctl/main.c | 63 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

diff --git a/src/networkctl/main.c b/src/networkctl/main.c
index 6ecaeb6a..494fd7d6 100644
--- a/src/networkctl/main.c
+++ b/src/networkctl/main.c
@@ -18,14 +18,75 @@
 #                                                                             #
 #############################################################################*/
 
+#include <errno.h>
+#include <getopt.h>
 #include <stdio.h>
+#include <unistd.h>
 
 #include <systemd/sd-bus.h>
 
-int main(int argc, char** argv) {
+static int version(void) {
+	printf("networkctl %s\n", PACKAGE_VERSION);
+
+	return 0;
+}
+
+static int help(void) {
+	printf(
+		"%s [OPTIONS...] COMMAND\n\n"
+		"Options:\n"
+		"  -h --help          Show help\n"
+		"     --version       Show version\n",
+		program_invocation_short_name
+	);
+
+	return 0;
+}
+
+static int parse_argv(int argc, char* argv[]) {
+	enum {
+		ARG_VERSION,
+	};
+
+	static const struct option options[] = {
+		{ "help",    no_argument, NULL, 'h' },
+		{ "version", no_argument, NULL, ARG_VERSION },
+		{ NULL },
+	};
+	int c;
+
+	for (;;) {
+		c = getopt_long(argc, argv, "h", options, NULL);
+		if (c < 0)
+			break;
+
+		switch (c) {
+			case 'h':
+				return help();
+
+			case ARG_VERSION:
+				return version();
+
+			case '?':
+				return -EINVAL;
+
+			default:
+				break;
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, char* argv[]) {
 	sd_bus* bus = NULL;
 	int r;
 
+	// Parse command line arguments
+	r = parse_argv(argc, argv);
+	if (r)
+		goto ERROR;
+
 	// Connect to system bus
 	r = sd_bus_open_system(&bus);
 	if (r < 0) {
-- 
2.47.2