How can I create a pid file from a backgournd process that I start?

Hackiller · 05-11-2004, 09:23 AM

Hey,
How can I create (in a bash script or c language) a pid file that has just the number of the pid in a file in /tmp/someting.pid or /tmp/something.tmp?!
Thanks

dorian33 · 05-11-2004, 03:32 PM

'man pidof' ?

Hackiller · 05-12-2004, 07:56 AM

Thanks... it helps me so much...
But, another question: and if I have more than one program started that has the same name but diferent options (like tail something > /dev/tty8 and tail something > /log.txt)... how can I take the pid just of the first one or the second one?
If I run pidof -s I get the first one but the next time I run that tail it will be the second one...
But if I have more tail's or another programs?
What can I do for get the specified pid?
Thanks a lot

dorian33 · 05-12-2004, 02:37 PM

For instance if you run 2 'tail' instances you can use:

Code:

ps -eo pid,cmd |grep 'tail'

Next you can filter the output with awk.