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#!/bin/sh
# Start/stop/restart the BIND name server daemon (named).
# Start BIND. By default this will run with user "named". If you'd like to
# change this or other options, see: /etc/default/named
# You might also consider running BIND in a "chroot jail",
# a discussion of which may be found in
# /usr/doc/Linux-HOWTOs/Chroot-BIND-HOWTO.
# One last note: rndc has a lot of other nice features that it is not
# within the scope of this start/stop/restart script to support.
# For more details, see "man rndc" or just type "rndc" to see the options.
# Load command defaults:
if [ -f /etc/default/named ] ; then . /etc/default/named ; fi
if [ -f /etc/default/rndc ] ; then . /etc/default/rndc ; fi
# In case /etc/default/named was missing, provide fallbacks:
if [ -z "$NAMED_USER" ]; then
NAMED_USER="named"
fi
if [ -z "$NAMED_GROUP" ]; then
NAMED_GROUP="named"
fi
if [ -z "$NAMED_OPTIONS" ]; then
NAMED_OPTIONS="-u $NAMED_USER"
fi
# Sanity check. If /usr/sbin/named is missing then it
# doesn't make much sense to try to run this script:
if [ ! -x /usr/sbin/named ]; then
echo "/etc/rc.d/rc.bind: no /usr/sbin/named found (or not executable); cannot start."
exit 1
fi
# Start BIND. As many times as you like. ;-)
# Seriously, don't run "rc.bind start" if BIND is already
# running or you'll get more than one copy running.
bind_start() {
# Make sure /var/run/named exists:
mkdir -p /var/run/named
# Make sure that /var/run/named has correct ownership:
chown -R ${NAMED_USER}:${NAMED_GROUP} /var/run/named
# Make sure that /var/named has correct ownership:
chown -R ${NAMED_USER}:${NAMED_GROUP} /var/named
if [ -r /etc/rndc.key ]; then
# Make sure that /etc/rndc.key has correct ownership:
chown ${NAMED_USER}:${NAMED_GROUP} /etc/rndc.key
fi
# Start named:
if [ -x /usr/sbin/named ]; then
echo "Starting BIND: /usr/sbin/named $NAMED_OPTIONS"
/usr/sbin/named $NAMED_OPTIONS
sleep 1
fi
# Make sure that named started:
if ! ps axc | grep -q named ; then
echo "WARNING: named did not start."
echo "Attempting to start named again: /usr/sbin/named $NAMED_OPTIONS"
/usr/sbin/named $NAMED_OPTIONS
sleep 1
if ps axc | grep -q named ; then
echo "SUCCESS: named started."
else
echo "FAILED: Sorry, a second attempt to start named has also failed."
echo "There may be a configuration error that needs fixing. Good luck!"
fi
fi
}
# Stop all running copies of BIND (/usr/sbin/named):
bind_stop() {
# If you've set up rndc, we can use this to make shutting down BIND faster.
# If you have /etc/rndc.conf, or you have /etc/rndc.key, or $RNDC_OPTIONS is
# not empty, we'll try it.
if [ -r /etc/rndc.conf -o -r /etc/rndc.key -o ! -z "$RNDC_OPTIONS" ]; then
if [ -z "$RNDC_OPTIONS" ]; then
echo "Stopping BIND: /usr/sbin/rndc stop"
else
echo "Stopping BIND: /usr/sbin/rndc $RNDC_OPTIONS stop"
fi
/usr/sbin/rndc $RNDC_OPTIONS stop
# Wait for up to $TIMEOUT seconds before moving on to try killall:
TIMEOUT=${TIMEOUT:-10}
while [ "$TIMEOUT" -gt "0" ]; do
# Exit the timeout loop if there are no named processes:
if ! ps axco command | grep -q -e "^named$"; then
break
fi
sleep 1
TIMEOUT=$(expr $TIMEOUT - 1)
done
fi
# Kill named processes if there are any running:
if ps axco command | grep -q -e "^named$"; then
echo "Stopping all named processes in this namespace: /bin/killall -SIGTERM --ns \$\$ named"
/bin/killall -SIGTERM --ns $$ named 2> /dev/null
fi
}
# Reload BIND:
bind_reload() {
/usr/sbin/rndc $RNDC_OPTIONS reload
}
# Restart BIND:
bind_restart() {
bind_stop
bind_start
}
# Get BIND status:
bind_status() {
/usr/sbin/rndc $RNDC_OPTIONS status
}
case "$1" in
'start')
bind_start
;;
'stop')
bind_stop
;;
'reload')
bind_reload
;;
'restart')
bind_restart
;;
'status')
bind_status
;;
*)
echo "usage $0 start|stop|reload|restart|status"
esac
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