config: add /etc/hostname support

If /etc/hostname is non-empty its contents is assumed to be the hostname.
This takes precedence over HOSTNAME in rc.conf.

This implements FS#27732 and http://0pointer.de/public/systemd-man/hostname.html,
and is the same as what is done on Debian, Ubuntu, Fedora and Suse.

Signed-off-by: Tom Gundersen <teg@jklm.no>

1 files changed, 3 insertions, 0 deletions

diff --git a/rc.sysinit b/rc.sysinit
index 8dd1607..602ef1f 100755
--- a/rc.sysinit
+++ b/rc.sysinit
@@ -225,6 +225,9 @@ RANDOM_SEED=/var/lib/misc/random-seed
 # Remove leftover files
 remove_leftover
 
+if [[ -s /etc/hostname ]]; then
+	HOSTNAME=$(< /etc/hostname)
+fi
 if [[ $HOSTNAME ]]; then
 	stat_busy "Setting Hostname: $HOSTNAME"
 	echo "$HOSTNAME" >| /proc/sys/kernel/hostname && stat_done || stat_fail