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Hi,

I am trying to write a script to turn on and off bluetooth.

At the moment I have two seperate scripts to do this, but I am trying to combine them into one script.

I want to check for the kbluetooth process, if this is running then I want to kill it and run rc.bluetooth stop

if it isn't running i want to run rc.bluetooth start and the start kbluetooth.

I have found this on the net that could check for the existence of hte kbluetooth process:

Code:

if ps ax | grep -v grep | grep kbluetooth > /dev/null

but I wanted to know if there was a better way of doing it, by checking PID's and how would I find the pid of kbluetooth?

Stuart

Code:

pidof kbluetooth

empty string and exit status 1, if the kbluetooth process it's not running, PID and exit status 0 otherwise.

Quote:

Originally Posted by stu_mueller (Post 3117810)

but I wanted to know if there was a better way of doing it, by checking PID's and how would I find the pid of kbluetooth?

Stuart

two variants: 1)

Code:

ps -C kbluetooth -o pid=

or 2)

Code:

pgrep kbluetooth

This way you can get rid of grep output

Code:

ps ax | grep [k]bluetooth

Hope this helps
Ciao

I recommend the method mentioned by iiv, but adding the -x parameter:

Code:

pgrep -x kbluetooth

Moreover, the pkill command does something similar but sending a signal to the processes it finds, so something like:

Code:

pkill -x kbluetooth && this_runs_if_it_was_found

Should be what you need.