a bug in dhcp exit hook script of ddclient

Bug #1704159 reported by Dmitry Redkin on 2017-07-13
This bug affects 4 people
Affects Status Importance Assigned to Milestone
ddclient (Debian)
ddclient (Ubuntu)

Bug Description

the ddclient DHCP exit hook script looks like:

[ -x /usr/sbin/ddclient ] || exit 0
[ -f /etc/default/ddclient ] || exit 0
. /etc/default/ddclient
[ $run_dhclient = "true" ] || exit 0

case $reason in
        /usr/bin/logger -t dhclient $reason, updating IP address with ddclient
        /usr/sbin/ddclient -daemon=0 -syslog > /dev/null 2>&1

The error is on line 7. As all the shell programming guides say, when checking a variable you have to quote it, or in case the variable is null (as it is in my case) you will get an error:

/sbin/dhclient-script: 7: [: =: unexpected operator

so the correct line 7 for this script is:

[ "$run_dhclient" = "true" ] || exit 0

Please fix it in LTS also as people start to complain on the forums about this bug already.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in ddclient (Ubuntu):
status: New → Confirmed
Manfred (mejf) wrote :

This bug caused me several hours of headscratching and work. :-(

Changed in ddclient (Debian):
status: Unknown → New
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