lokinet/contrib/lokinet-resolvconf

55 lines
1.4 KiB
Bash
Executable File

#!/bin/bash
# Script to invoke resolvconf (if installed) to add/remove lokinet into/from the resolvconf DNS
# server list. This script does not add if any of these are true:
#
# - /sbin/resolvconf does not exist
# - the systemd-resolved service is active
# - a `no-resolvconf=1` item is present in the [dns] section of lokinet.ini
#
# It always attempts to remove if resolvconf is installed (so that commenting out while running,
# then stopping still removes the added entry).
#
# Usage: lokinet-resolvconf {add|remove} /etc/loki/lokinet.ini
set -e
action="$1"
conf="$2"
if [[ ! ("$action" == "add" || "$action" == "remove") || ! -f "$conf" ]]; then
echo "Usage: $0 {add|remove} /path/to/lokinet.ini" >&2
exit 1
fi
if ! [ -x /sbin/resolvconf ]; then
exit 0
fi
if [ -x /bin/systemctl ] && /bin/systemctl --quiet is-active systemd-resolved.service; then
exit 0
fi
if [ "$action" == "add" ]; then
if ! [ -x /sbin/resolvconf ]; then exit 0; fi
lokinet_ns=$(perl -e '
$ns = "127.3.2.1"; # default if none found in .ini
while (<>) {
if ((/^\[dns\]/ ... /^\[/)) {
if (/^bind\s*=\s*([\d.]+)(?::53)?\s*$/) {
$ns=$1;
} elsif (/^no-resolvconf\s*=\s*1\s*/) {
exit;
}
}
}
print $ns' "$conf")
if [ -n "$lokinet_ns" ]; then
echo "nameserver $lokinet_ns" | /sbin/resolvconf -a lo.000lokinet
fi
else
/sbin/resolvconf -d lo.000lokinet
fi