etc-gentoo/init.d/._cfg0000_hostname

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#!/sbin/openrc-run
# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
description="Sets the hostname of the machine."
depend() {
keyword -prefix -systemd-nspawn -lxc
}
start()
{
# HOSTNAME variable used to be defined in caps in conf.d/hostname.
# It is also a magic variable in bash.
hostname=${hostname-${HOSTNAME-localhost}} # checkbashisms: false positive
ebegin "Setting hostname to $hostname"
hostname "$hostname"
eend $? "Failed to set the hostname"
}