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#!/bin/sh
#
### BEGIN INIT INFO
# Provides: resolvconf
# Required-Start: $local_fs
# Required-Stop: $local_fs
# X-Start-Before: networking ifupdown
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: Nameserver information manager
# Description: This service manages the list of nameserver addresses
# used by the libc resolver and name service caches
### END INIT INFO
#
# This file is part of the resolvconf package.
#
# We really need "X-Stop-Before: networking ifupdown" too because
# terminal ifdowns shouldn't update resolv.conf;
# however there is unfortunately no such thing as "X-Stop-Before".
#
# This file is not used in Ubuntu.
#
# Don't use set -e; check return status instead.
[ -x /sbin/resolvconf ] || exit 0
PATH=/sbin:/bin
RUN_DIR=/run/resolvconf
ENABLE_UPDATES_FLAGFILE="${RUN_DIR}/enable-updates"
POSTPONED_UPDATE_FLAGFILE="${RUN_DIR}/postponed-update"
. /lib/lsb/init-functions
# Abort if Upstart is in use, as per Policy §9.11.1.
case "$1" in
start|restart|force-reload)
init_is_upstart && exit 1
;;
stop)
init_is_upstart && exit 0
;;
esac
# $1 EXITSTATUS
# [$2 MESSAGE]
log_action_end_msg_and_exit()
{
log_action_end_msg "$1" ${2:+"$2"}
exit $1
}
create_runtime_directories()
{
umask 022
if [ ! -d "$RUN_DIR" ] ; then
[ -L "$RUN_DIR" ] || log_action_end_msg_and_exit 1 "$RUN_DIR is neither a directory nor a symbolic link"
# It's a symlink. Its target is not a dir.
{ RUN_CANONICALDIR="$(readlink -f "$RUN_DIR")" && [ "$RUN_CANONICALDIR" ] ; } || log_action_end_msg_and_exit 1 "Canonical path of the run directory could not be determined"
# Create directory at the target
mkdir "$RUN_CANONICALDIR" || log_action_end_msg_and_exit 1 "Error creating directory $RUN_CANONICALDIR"
fi
# The resolvconf run directory now exists.
if [ ! -d "${RUN_DIR}/interface" ] ; then
mkdir "${RUN_DIR}/interface" || log_action_end_msg_and_exit 1 "Error creating directory ${RUN_DIR}/interface"
fi
# The interface directory now exists. We are done.
return
}
wipe_runtime_directories()
{
# Delete files in the resolvconf run directory (target) but not the directory itself
[ -d "$RUN_DIR" ] || return
rm -f "$RUN_DIR"/resolv.conf
rm -f "$ENABLE_UPDATES_FLAGFILE"
rm -f "$POSTPONED_UPDATE_FLAGFILE"
rm -rf "${RUN_DIR}/interface/*"
return
}
case "$1" in
start)
# The "start" method should only be used at boot time.
# Don't run this on package upgrade, for example.
log_action_begin_msg "Setting up resolvconf"
# Wipe runtime directories in case they aren't on a tmpfs
wipe_runtime_directories
# Create runtime directories in case they are on a tmpfs
create_runtime_directories
# Request a postponed update (needed in case the base file has content).
:> "$POSTPONED_UPDATE_FLAGFILE" || log_action_end_msg_and_exit 1 "failed requesting update"
# Enable updates and perform the postponed update.
resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
log_action_end_msg_and_exit 0
;;
stop)
# The "stop" method should only be used at shutdown time.
log_action_begin_msg "Stopping resolvconf"
resolvconf --disable-updates || log_action_end_msg_and_exit 1 "failed to disable updates"
log_action_end_msg_and_exit 0
;;
restart)
log_action_begin_msg "Restarting resolvconf"
resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
log_action_end_msg_and_exit 0
;;
reload|force-reload)
resolvconf -u || log_action_end_msg_and_exit 1 "failed to update"
exit 0
;;
enable-updates)
resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
exit 0
;;
disable-updates)
resolvconf --disable-updates || log_action_end_msg_and_exit 1 "failed to disable updates"
exit 0
;;
status)
if resolvconf --updates-are-enabled ; then
log_success_msg "resolvconf updates are enabled"
else
log_failure_msg "resolvconf updates are disabled"
fi
exit 0
;;
*)
echo "Usage: /etc/init.d/resolvconf {start|stop|restart|reload|force-reload|enable-updates|disable-updates|status}" >&2
exit 3
;;
esac
# Don't reach here
exit 99
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