Module Name: src
Committed By: rillig
Date: Sun Apr 25 20:19:19 UTC 2021
Modified Files:
src/games/cgram: cgram.c
Log Message:
cgram: provide usage on incorrect invocation
To generate a diff of this commit:
cvs rdiff -u -r1.19 -r1.20 src/games/cgram/cgram.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/games/cgram/cgram.c
diff -u src/games/cgram/cgram.c:1.19 src/games/cgram/cgram.c:1.20
--- src/games/cgram/cgram.c:1.19 Sun Apr 25 20:14:29 2021
+++ src/games/cgram/cgram.c Sun Apr 25 20:19:19 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: cgram.c,v 1.19 2021/04/25 20:14:29 rillig Exp $ */
+/* $NetBSD: cgram.c,v 1.20 2021/04/25 20:19:19 rillig Exp $ */
/*-
* Copyright (c) 2013, 2021 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: cgram.c,v 1.19 2021/04/25 20:14:29 rillig Exp $");
+__RCSID("$NetBSD: cgram.c,v 1.20 2021/04/25 20:19:19 rillig Exp $");
#endif
#include <assert.h>
@@ -594,11 +594,23 @@ clean_up(void)
stringarray_cleanup(&lines);
}
-////////////////////////////////////////////////////////////
+
+static void __dead
+usage(void)
+{
+
+ fprintf(stderr, "usage: %s [file]\n", getprogname());
+ exit(1);
+}
int
main(int argc, char *argv[])
{
+
+ setprogname(argv[0]);
+ if (argc != 1 && argc != 2)
+ usage();
+
init(argc > 1 ? argv[1] : NULL);
loop();
clean_up();
