From eff9d66ba6af627543a37ea36567d9ce6d0e28a8 Mon Sep 17 00:00:00 2001
From: Miciah Masters <miciah.masters@gmail.com>
Date: Sat, 24 Dec 2016 03:46:02 -0500
Subject: Do not write NUL to state file

Do not write a trailing NUL byte to the state file.

Before:

    % brightnessctl -ms
    intel_backlight,backlight,1000,20%,4794
    % od -t x1z /tmp/brightnessctl/backlight/intel_backlight
    0000000 31 30 30 30 00                                   >1000.<
    0000005
    %

After:

    % brightnessctl -ms
    intel_backlight,backlight,1000,20%,4794
    % od -t x1z /tmp/brightnessctl/backlight/intel_backlight
    0000000 31 30 30 30                                      >1000<
    0000004
    %

Note that restore still works:

    % brightnessctl -mr
    intel_backlight,backlight,1000,20%,4794
    %
---
 brightnessctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'brightnessctl.c')

diff --git a/brightnessctl.c b/brightnessctl.c
index 3f7cfc1..1eee6c6 100644
--- a/brightnessctl.c
+++ b/brightnessctl.c
@@ -405,7 +405,7 @@ int save_device_data(struct device *dev) {
 		goto fail;
 	if (!(fp = fopen(d_path, "w")))
 		goto fail;
-	if (fwrite(c, 1, s + 1, fp) < s + 1)
+	if (fwrite(c, 1, s, fp) < s)
 		errno = -1;
 	fclose(fp);
 fail:
-- 
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