live-build/helpers/lh_chroot_resolv

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#!/bin/sh
# lh_chroot_resolv(1) - manage /etc/resolv.conf
# Copyright (C) 2006-2008 Daniel Baumann <daniel@debian.org>
#
# live-helper comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
# This is free software, and you are welcome to redistribute it
# under certain conditions; see COPYING for details.
set -e
# Including common functions
LH_BASE="${LH_BASE:-/usr/share/live-helper}"
for FUNCTION in "${LH_BASE}"/functions/*.sh
do
. "${FUNCTION}"
done
# Setting static variables
DESCRIPTION="manage /etc/resolv.conf"
HELP=""
USAGE="${PROGRAM} {install|remove} [--force]"
Arguments "${@}"
# Reading configuration files
Read_conffile config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults
# Requiring stage file
Require_stagefile .stage/bootstrap
case "${1}" in
install)
Echo_message "Configuring file /etc/resolv.conf"
# Checking stage file
Check_stagefile .stage/chroot_resolv
# Checking lock file
Check_lockfile .lock
# Creating lock file
Create_lockfile .lock
if [ -e chroot/etc/resolv.conf ]
then
# Save resolv file or symlink
mv chroot/etc/resolv.conf chroot/etc/resolv.conf.orig
fi
if [ -f /etc/resolv.conf ]
then
# Copy resolv file
cp /etc/resolv.conf chroot/etc/resolv.conf
fi
# Creating stage file
Create_stagefile .stage/chroot_resolv
;;
remove)
Echo_message "Deconfiguring file /etc/resolv.conf"
# Checking lock file
Check_lockfile .lock
# Creating lock file
Create_lockfile .lock
if [ -e chroot/etc/resolv.conf.orig ]
then
# Restoring resolv file or symlink
mv chroot/etc/resolv.conf.orig chroot/etc/resolv.conf
else
# Truncating resolv file
Truncate chroot/etc/resolv.conf
fi
# Removing stage file
rm -f .stage/chroot_resolv
;;
*)
Usage
;;
esac