From f2137dc28d167092a00f075ec628db32fd26de79 Mon Sep 17 00:00:00 2001
From: remoof <remoof@tutanota.de>
Date: Sat, 17 Jul 2021 18:29:39 +0200
Subject: [PATCH] Add version and usage if no arguments are given.

---
 rdo.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/rdo.c b/rdo.c
index 0fb1162..bcb1862 100644
--- a/rdo.c
+++ b/rdo.c
@@ -9,6 +9,8 @@
 #include <bsd/readpassphrase.h>
 #include "sessions.h"
 
+#define VERSION "1.2"
+
 void getconf(FILE* fp, const char* entry, char* result, size_t len_result) {
 	char* line = NULL;
 	size_t len = 0;
@@ -49,8 +51,11 @@ int main(int argc, char** argv) {
 	char username[64], wrong_pw_sleep[64], session_ttl[64], password[128];
 	unsigned int sleep_ms, tries, ts_ttl;
 
-	if (argc < 2)
-		errx(1, "Please specify a program to run");
+	if (argc == 1) {
+		printf("RootDO version: %s\n\n", VERSION);
+		printf("Usage: %s [command]\n", argv[0]);
+		return 0;
+	}
 
 	int ruid = getuid();
 	if (ruid == 0)