Even if the daemon is run from cron, this issue could bite our questioner
The unit is going to be installed in an environment whereby it cannot do anything to alert anyone to its distress if there is an ongoing problem. If it cannot get the time, it cannot function. The only way I will know is by checking if it is reporting in to the server regularly which it is configured to do each time it opens or closes the curtains.
For that reason, I have re-written the above code so that a lockfile is not necessary. Instead, if the time is not set correctly, it logs the problem, increments a counter in the config file and exits. Next time it gets fired up by cron it has another chance to check the time but will reboot if it has been restarted 15 times as half an hour should be plenty of time for the router to come back to life after a power failure is restored.
my @time = localtime;
$control->log("Starting Curtain Controller") if $DEBUG > 1;
# Check Pi has valid time
if ($time[5] + 1900 < 2020) {
my $restart = $local_conf->key('RESTART COUNT');
if ($restart > 15) {
$control->log("Still no valid time - rebooting!");
$local_conf->key('RESTART_COUNT', '0');
sleep 2;
system("reboot");
exit 0;
}
$control->log("No valid time is set - exit $restart");
$restart++;
$local_conf->key('RESTART_COUNT', $restart);
exit 0;
}
$local_conf->key('RESTART_COUNT', '0');
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|