ddclient init script fails to stop process

Bug #980409 reported by Jon Oler
This bug affects 8 people
Affects Status Importance Assigned to Milestone
ddclient (Debian)
Fix Released
ddclient (Ubuntu)

Bug Description

I'm running ddclient 3.8.0-11.4ubuntu1 on ubuntu 12.04. The init script fails to stop the ddclient process (/etc/init.d/ddclient stop) with no errors reported. Starting ddclient when a ddclient process is already running (started from init script) also fails. The problem appears to be that the init script uses '--name ddclient' with start-stop-daemon. However, the process name lookup is failing because ddclient is changing the process name to. for example, 'ddclient - sleeping for 70 seconds'. In other words. the process name is not 'ddclient', but 'ddclient' with some status info tacked on to the end. Since start-stop-daemon is searching for processes named 'ddclient', the lookup never succeeds, so no processes are ever stopped. The start action also always starts a new ddclient process because it never thinks a ddclient process is running. I've fixed this problem locally by removing the 3 instances of the string '--name $NAME' in /etc/init.d/ddclient. I've tested it out, and it does appear to resolve my issue. I'd like to see this change (or a better one) make it to the ubuntu packaging.

Revision history for this message
Launchpad Janitor (janitor) wrote :

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

Changed in ddclient (Ubuntu):
status: New → Confirmed
Changed in ddclient (Ubuntu):
importance: Undecided → High
status: Confirmed → Triaged
Changed in ddclient (Debian):
status: Unknown → New
Revision history for this message
Øyvind Stegard (oyvindstegard) wrote :

Confirming. Removing "--name" as process matching criterium for start-stop-daemon in init-script resolves the issue. The PID file should be sufficient.

Revision history for this message
Tristan Schmelcher (tschmelcher) wrote :

Confirmed the work-around. Here's the changes as a diff:

$ apt-diff ddclient
--- /tmp/apt-diff_1001/extracted/ddclient/etc/init.d/ddclient 2012-08-09 17:33:15.000000000 -0700
+++ /etc/init.d/ddclient 2012-11-24 08:48:39.000000000 -0800
@@ -52,12 +52,12 @@
  # 1 if daemon was already running
  # 2 if daemon could not be started
  start-stop-daemon --test --start --quiet \
- --pidfile $PIDFILE --name $NAME --startas $DAEMON \
+ --pidfile $PIDFILE --startas $DAEMON \
   >/dev/null \
   || return 1

  start-stop-daemon --start --quiet \
- --pidfile $PIDFILE --name $NAME --startas $DAEMON \
+ --pidfile $PIDFILE --startas $DAEMON \
   -- $OPTIONS \
   || return 2
@@ -77,7 +77,7 @@
  # 2 if daemon could not be stopped
  # other if a failure occurred
  start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
- --pidfile $PIDFILE --name $NAME
+ --pidfile $PIDFILE
  return "$?"

Found 1 differences between filesystem state and package state
Skipped 1 unverifiable directories
Finished in 0.674012 seconds

Revision history for this message
Tristan Schmelcher (tschmelcher) wrote :

Attaching the diff as a file marked as a patch in the hope that it draws some attention.

Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

The attachment "Patch to /etc/init.d/ddclient that fixes the bug" of this bug report has been identified as being a patch. The ubuntu-reviewers team has been subscribed to the bug report so that they can review the patch. In the event that this is in fact not a patch you can resolve this situation by removing the tag 'patch' from the bug report and editing the attachment so that it is not flagged as a patch. Additionally, if you are member of the ubuntu-reviewers team please also unsubscribe the team from this bug report.

[This is an automated message performed by a Launchpad user owned by Brian Murray. Please contact him regarding any issues with the action taken in this bug report.]

tags: added: patch
Changed in ddclient (Debian):
status: New → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package ddclient - 3.8.1-1ubuntu2

ddclient (3.8.1-1ubuntu2) saucy; urgency=low

  * debian/ddclient.NetworkManager
    - Use NetworkManager dispatcher to stop/start ddclient, fixes DNS lookup
      errors that caused checkins to fail (LP: #998700)
  * debian/ddclient.init
    - lintian reports missing runlevels for stop, adjusted to 0 1 6
  [ Tristan Schmelcher ]
  * debian/ddclient.init
    - ddclient init script fails to stop process (LP: #980409)
 -- Ken VanDine <email address hidden> Mon, 29 Jul 2013 09:41:53 -0400

Changed in ddclient (Ubuntu):
status: Triaged → Fix Released
Changed in ddclient (Debian):
status: Fix Committed → Fix Released
Revision history for this message
Rarylson Freitas (rarylson) wrote :


Although this thread shows the bug was fixed in the package ddclient@3.8.1-1ubuntu2, the last version in Ubuntu 12.04 LTS actualy is the 3.8.0-11.4ubuntu1. It is, the patch was not applyed to all supported Ubuntu versions.

I tested this and a similar patch as posted in the follow link, and all of them worked in Ubuntu 12.04: https://bugs.launchpad.net/ubuntu/+source/ddclient/+bug/1241612

Can this bugfix be backported to the Ubuntu 12.04 version (3.8.0-11)?

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