Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Re: Auto-restarting script if it dies

by samizdat (Vicar)
on Mar 09, 2007 at 13:04 UTC ( #603981=note: print w/replies, xml ) Need Help??


in reply to Auto-restarting script if it dies

Hi, mojodaddy!

I'm not awake enough to deal with buffering of print statements, but I will compliment you on re-inventing the concept of a pidfile. Good going! {and, I don't mean that facetiously! :-}

There's another cool concept in UN!X and BSD and Linux called "respawning" in init. In Linux (since you mentioned that) you just find the little file called /etc/inittab and add a line at the end of it with your program name, like so:

my:2345:respawn:/usr/local/bin/myprog.pl -m -y --options

where 'my' is a token up to three characters, '2345' says run it in all Runlevels from multi-user to X GUI, 'respawn' says 'restart if it dies', and the rest is the path to your executable program and its options.

To kick it off, either reset the init process with kill -1 1 or restart your computer. This is a simplified description, but the result is that the init process will do all your restarting work for you. You won't have direct writing of stderr or stdout to a terminal there, but you can learn how to associate your process with a running program or with syslogd and there you go, off on another exploration! :D

Don Wilde
"There's more than one level to any answer."

Replies are listed 'Best First'.
Re^2: Auto-restarting script if it dies
by mojodaddy (Pilgrim) on Mar 09, 2007 at 20:13 UTC
    Cool, thanks. And as for your simplified description, that's the only kind I'm likely to understand! : )

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://603981]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (3)
As of 2021-01-24 00:58 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Notices?