From 732dc2c66fe60fd6eebc26f2492fc11f520e072c Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Tue, 11 Mar 2014 21:09:04 -0700
Subject: [PATCH] backlight: Fix copy/paste error printing an unrelated error
 code

udev_device_get_sysattr_value returns NULL on failure, but doesn't
provide an error code; thus, when printing an error from it, don't print
an unrelated error code from a previous call.

(cherry picked from commit cddc35f75ecff63b2ffd3f8e4c863d475e7b14ca)
(cherry picked from commit b8b80c8aa1effecb9c224cd3be1e8acbf7a44745)
---
 src/backlight/backlight.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backlight/backlight.c b/src/backlight/backlight.c
index e8cdad6..4b04a3a 100644
--- a/src/backlight/backlight.c
+++ b/src/backlight/backlight.c
@@ -322,7 +322,7 @@ int main(int argc, char *argv[]) {
 
                 value = udev_device_get_sysattr_value(device, "brightness");
                 if (!value) {
-                        log_error("Failed to read system attribute: %s", strerror(-r));
+                        log_error("Failed to read system attribute");
                         return EXIT_FAILURE;
                 }