<p></p>
<p>I asked in the dev email list without a response.<br>
So will also here.</p>
<p>I have observed a case when Kamaili debug module try to grab the lock on shutdown and not able to do it.<br>
As a result, the Kamailio process is stuck and not able to restart (dead lock).</p>
<p>To resolve such a case I want to utilize systemd watchdog <a href="https://www.freedesktop.org/software/systemd/man/sd_watchdog_enabled.html" rel="nofollow">feature</a></p>
<p>To use this feature I need to send  sd_notify(3) with a message string of "WATCHDOG=1" from the main process.<br>
<a href="https://www.freedesktop.org/software/systemd/man/sd_watchdog_enabled.html" rel="nofollow">Link</a></p>
<p>According to systemd doc watchdog can be applied only to one process. <a href="https://www.freedesktop.org/software/systemd/man/sd_watchdog_enabled.html" rel="nofollow">Link</a></p>
<blockquote>
<p>If the $WATCHDOG_USEC environment variable is set, and the $WATCHDOG_PID variable is unset or set to the PID of the current process, the service manager expects notifications from this process.</p>
</blockquote>
<p><a href="https://lists.freedesktop.org/archives/systemd-devel/2018-January/040185.html" rel="nofollow">Additional info</a></p>
<p>Could you suggest how to embed this systemd call to the main process? This will allow use <code>systemsd watchdog</code> feature.</p>

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