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87 lines
2.1 KiB
87 lines
2.1 KiB
6 years ago
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#!/bin/bash
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# Warning: the order is important
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# If a directory containing $ROOTDIR is listed here,
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# it MUST be listed last. (/var/named contains /var/named/chroot)
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ROOTDIR_MOUNT='/etc/localtime /etc/named /etc/pki/dnssec-keys /etc/named.root.key /etc/named.conf
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/etc/named.dnssec.keys /etc/named.rfc1912.zones /etc/rndc.conf /etc/rndc.key /etc/named.iscdlv.key /etc/protocols /etc/services
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/usr/lib64/bind /usr/lib/bind /run/named
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/var/named'
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usage()
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{
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echo
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echo 'This script setups chroot environment for BIND'
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echo 'Usage: setup-named-chroot.sh ROOTDIR [on|off]'
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}
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if ! [ "$#" -eq 2 ]; then
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echo 'Wrong number of arguments'
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usage
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exit 1
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fi
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ROOTDIR="$1"
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# Exit if ROOTDIR doesn't exist
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if ! [ -d "$ROOTDIR" ]; then
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echo "Root directory $ROOTDIR doesn't exist"
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usage
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exit 1
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fi
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mount_chroot_conf()
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{
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if [ -n "$ROOTDIR" ]; then
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for all in $ROOTDIR_MOUNT; do
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# Skip nonexistant files
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[ -e "$all" ] || continue
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# If mount source is a file
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if ! [ -d "$all" ]; then
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# mount it only if it is not present in chroot or it is empty
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if ! [ -e "$ROOTDIR$all" ] || [ `stat -c'%s' "$ROOTDIR$all"` -eq 0 ]; then
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touch "$ROOTDIR$all"
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mount --bind "$all" "$ROOTDIR$all"
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fi
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else
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# Mount source is a directory. Mount it only if directory in chroot is
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# empty.
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if [ -e "$all" ] && [ `ls -1A $ROOTDIR$all | wc -l` -eq 0 ]; then
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mount --bind --make-private "$all" "$ROOTDIR$all"
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fi
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fi
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done
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fi
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}
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umount_chroot_conf()
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{
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if [ -n "$ROOTDIR" ]; then
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for all in $ROOTDIR_MOUNT; do
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# Check if file is mount target. Do not use /proc/mounts because detecting
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# of modified mounted files can fail.
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if mount | grep -q '.* on '"$ROOTDIR$all"' .*'; then
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umount "$ROOTDIR$all"
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# Remove temporary created files
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[ -f "$all" ] && rm -f "$ROOTDIR$all"
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fi
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done
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fi
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}
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case "$2" in
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on)
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mount_chroot_conf
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;;
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off)
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umount_chroot_conf
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;;
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*)
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echo 'Second argument has to be "on" or "off"'
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usage
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exit 1
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esac
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exit 0
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