execute command when program closes

frieza · 11-17-2003, 02:22 AM

how would i go about creating a shell script based 'launcher' menu that would respawn whenever the program launched quits? i would imagine such is possible considering how powerfull linux really is...

MacKtheHacK · 11-17-2003, 02:25 PM

I'm not sure what you mean by "menu", but the basic way to respawn in a shell script is to write a function that loops running your program over and over. Start that function running in the background, and there you go. Here's a dumb example:

#! /bin/sh
respawn() {
while [ 1 ]
do "$@" </dev/null >/dev/null 2>&1
done
}
respawn sleep 5 &

I hope this is what you have in mind.

Tinkster · 11-17-2003, 04:05 PM

Quote:

Originally posted by frieza
Micro$oft 1> /dev/null 2> /dev/null

Not lazy enough :} ... too much typing!

Micro$oft > /dev/null 2>&1

;)

Cheers,
Tink

unSpawn · 11-17-2003, 05:51 PM

In the first place you should have told us which app or why it quits, there's usually lots of workarounds and alternatives, like if the app is a daemon, Google/see Freshmeat for "monit". Also see "man nohup".

Anyway, in your ~/.bashrc add this line:
restart() { "$@" && restart "$@"; }
start any app as usual, just prefix "restart".