From c457212c65d13c3afb045f77f05f598d0ec5befe Mon Sep 17 00:00:00 2001
From: =?utf8?q?Elan=20Ruusam=C3=A4e?= <glen@delfi.ee>
Date: Mon, 8 Jun 2015 15:44:29 +0300
Subject: [PATCH] setup /etc/hostname only if file is missing or empty

http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2015-June/024391.html
---
 systemd.spec | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/systemd.spec b/systemd.spec
index 7f2c20a..de0f970 100644
--- a/systemd.spec
+++ b/systemd.spec
@@ -934,13 +934,14 @@ if [ $1 -eq 1 ]; then
 	# And symlink what we found to the new-style default.target
 	ln -s "$target" %{_sysconfdir}/systemd/system/default.target || :
 
-	# Setup hostname
-	HOSTNAME=
-	[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network
-	if [ -n "$HOSTNAME" -a "$HOSTNAME" != "pldmachine" ]; then
-		[ -f /etc/hostname ] && mv -f /etc/hostname /etc/hostname.rpmsave
-		echo $HOSTNAME > /etc/hostname
-		chmod 644 /etc/hostname
+	# Setup hostname if not yet done so
+	if [ ! -f /etc/hostname ] || [ ! -s /etc/hostname ]; then
+		HOSTNAME=
+		[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network
+		if [ -n "$HOSTNAME" -a "$HOSTNAME" != "pldmachine" ]; then
+			echo $HOSTNAME > /etc/hostname
+			chmod 644 /etc/hostname
+		fi
 	fi
 
 	# Enable the services we install by default.
-- 
2.44.0