How to catch the status of a running script?

Question

Perl

The point is the following. On the Unix server, a perl script hangs in memory, which sometimes does something. There is another sh-script, which, when launched, should understand whether the above perl-script is currently processing something or not, and, depending on the result, perform different actions. The only option that comes to mind is with a file where the perl script writes "1" when starting work, and "0" when stopping. Accordingly, the sh-script looks at the same file at startup and understands whether the perl-script "works" now or not. Or adult uncles solve such issues differently?

Answer 1

lock file is a perfectly normal solution. And most importantly - universal for the monitoring script. You can only think not to write 0, but to delete the file. And do not forget to put the whole thing into all sorts of actions and other points of possible completion of the script.