From 7558f26d28e1bcc6a62c42405c65ab14cc632ef3 Mon Sep 17 00:00:00 2001
From: Dubiousjim <dubiousjim@gmail.com>
Date: Sat, 29 Jun 2013 16:41:27 -0400
Subject: main/syslinux: don't create backup when no changes

---
 main/syslinux/update-extlinux | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

(limited to 'main/syslinux')

diff --git a/main/syslinux/update-extlinux b/main/syslinux/update-extlinux
index 66bc0edc7..0ba4bbf21 100755
--- a/main/syslinux/update-extlinux
+++ b/main/syslinux/update-extlinux
@@ -169,18 +169,22 @@ if [ -f "/boot/reboot.c32" ]; then
 	echo "" >> $conf.new
 fi
 
+if cmp --quiet $conf.new $conf; then
+	everbose "Configuration unchanged."
+	rm $conf.new
+fi
 
 if [ "$overwrite" != "1" ]; then
 	exit 0
-fi
+elif [ -f "$conf.new" ]; then
+	# keep a backup just in case
+	if [ -f "$conf" ]; then
+		mv $conf $conf.old
+	fi
 
-# keep a backup just in case
-if [ -f "$conf" ]; then
-	mv $conf $conf.old
+	mv $conf.new $conf
 fi
 
-mv $conf.new $conf
-
 everbose "Installing libutil.c32 libcom32.c32 mboot.c32 menu.c32 vesamenu.c32 to /boot."
 cp /usr/share/syslinux/libutil.c32 \
 	/usr/share/syslinux/libcom32.c32 \
-- 
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