I use the following in a backup script. 
#...
$SIG{'INT'}  = 'cleanup'; # we want to rewind tape & write to log
$SIG{'HUP'}  = 'cleanup'; # we want to rewind tape & write to log
# later...


sub cleanup
{
   # Normal is set to true if the script has got through the
   # rest.
   &report("\nAbnormal exit, cleaning up") unless $normal;
   if ($normal)
   {
      &eject();
   }
   else
   {
      &rewind();
      &eject() if $opt{e};
   }
# Report and other stuff here deleted.
}

[download]
/etc/init.d (on many unixes) will have examples of start/stop scripts. Stopping is often done by signalling using a stored Process ID, so the $SIG{INT} handler handles both unexpected kills and 'normal' kills e.g. from a shutdon command.
--
Brovnik

In reply to Re: Gracefully exiting daemons by Brovnik
in thread Gracefully exiting daemons by asiufy

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