[Chicago-talk] Determining if another perl process is running.

[Richard Reina]

Hello everyone,

So excited about the Winter Perl Conference that I just registered for that
I thought I would rebuild my aged Perl Dancer2 website. I 've done so and
deployed it on a Digital Ocean droplet but I've hit a snag in setting up a
cron job to make sure starman is running. It seems my query into whether
the process is running gets treated as evidence that the process IS
running.

When I do:

perl -e 'my $smstat = `ps -ef | grep starman`; unless ($smstat =~ /starman
master/) { system("XDG_RUNTIME_DIR=/run/user/1001 exec /home/starman/
starman.pl start &>> /home/starman/starman.log"); print localtime . "
starting starman\n"; } else { print "Starman is already running\n\n\n
$smstat\n" }';

RESULTS IN:

Starman is already running


 starman   203805       1  0 Nov08 ?        00:00:00 /lib/systemd/systemd
--user
starman   203806  203805  0 Nov08 ?        00:00:00 (sd-pam)
root      472040     385  0 Nov20 ?        00:00:00 sshd: starman [priv]
starman   472049  472040  0 Nov20 ?        00:00:01 sshd: starman at pts/0
starman   472050  472049  0 Nov20 pts/0    00:00:00 -bash
starman   544383  472050  0 23:11 pts/0    00:00:00 perl -e my $smstat =
`ps -ef | grep starman`; unless ($smstat =~ /starman master/) {
system("XDG_RUNTIME_DIR=/run/user/1001 exec /home/starman/starman.pl start
&>> /home/starman/starman.log"); print localtime . " starting starman\n"; }
else { print "Starman is already running\n\n\n $smstat\n" }
starman   544384  544383  0 23:11 pts/0    00:00:00 sh -c ps -ef | grep
starman
starman   544385  544384  0 23:11 pts/0    00:00:00 ps -ef
starman   544386  544384  0 23:11 pts/0    00:00:00 grep starman

It always says it's running even if it is not apparently because it's
seeing 'starman master/ in the perl script that is inquiring.

Anyone know a good solution to avoid this so that I can determine whether
my starman startup script is indeed running?
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