From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Wed, 14 Jun 2017 10:53:19 +0000 (+0200)
Subject: gpiomon: don't ignore superfluous arguments
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=01a8307bb735f27770bdcff952eab1bb6c95cb1d;p=qemu-gpiodev%2Flibgpiod.git

gpiomon: don't ignore superfluous arguments

We don't currently support watching more than one line at a time. Bail
out if the user gives us more than two non-option arguments.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/src/tools/gpiomon.c b/src/tools/gpiomon.c
index afc511b..6b984b9 100644
--- a/src/tools/gpiomon.c
+++ b/src/tools/gpiomon.c
@@ -158,6 +158,9 @@ int main(int argc, char **argv)
 	if (argc < 2)
 		die("GPIO line offset must be specified");
 
+	if (argc > 2)
+		die("watching more than one GPIO line unsupported");
+
 	device = argv[0];
 	offset = strtoul(argv[1], &end, 10);
 	if (*end != '\0' || offset > INT_MAX)