pidof -o %PPID program

vanalex · 01-26-2004, 04:21 PM

Hello

Please, help me someone to undestand how the program pidof works.

In the script /etc/rc.d/init.d/functions I see the following how to get PID:

pid=`pidof -o $$ -o $PPID -o %PPID -x $1`

I do not understand the meaning of %PPID. I think bash interprets it as a regular string, so what does it mean for program pidof?

Looking_Lost · 01-26-2004, 05:31 PM

a quick man pidof - %PPID is a special variable which represents the parent process id of the script which pidof is in, in this case I assume it is the id of functions, unless I'm reading it wrong.

vanalex · 01-26-2004, 09:35 PM

Thanks for your reply

I do know that $PPID is interpretted by bash shell as the PID of parrent process, however what is %PPID - I do not understand that percent sign% .