From 624d45a10f4d2d84a32a4e9fbcd370aa653271f8 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Fri, 4 Sep 2020 21:28:33 +0200
Subject: Do not accept arguments
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 mongoclock.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'mongoclock.c')

diff --git a/mongoclock.c b/mongoclock.c
index e2d7e20..d94fd28 100644
--- a/mongoclock.c
+++ b/mongoclock.c
@@ -5,9 +5,12 @@
 #include <signal.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <time.h>
 #include <unistd.h>
 
+#include "arg.h"
+
 #define DX 16
 #define DY 12
 #define DC 16
@@ -32,6 +35,15 @@ static const char **mongo_ds[] = {
 static volatile sig_atomic_t caught_sigterm = 0;
 static volatile sig_atomic_t caught_sigwinch = 1;
 
+char *argv0;
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: %s\n", argv0);
+	exit(1);
+}
+
 static void
 sigterm(int signo)
 {
@@ -77,6 +89,14 @@ main(int argc, char *argv[])
 	struct itimerspec itimerspec;
 	uint64_t _overrun;
 
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc)
+		usage();
+
 	fprintf(stdout, "\033[?1049h\033[?25l");
 
 	if (clock_gettime(CLOCK_REALTIME, &itimerspec.it_value))
-- 
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