On 2/17/06, Michael Moore <[EMAIL PROTECTED]> wrote: > Hello shell script gurus. I'm sure I'm doing this the hard way...so if > you could shed some light. > > I'm trying to write a shell script that will only run if it's not > running already, and if it is running, kill the other process. ie: > > if ( other copy of me already running) > kill both myself and other copy > else > do some stuff > fi > > The script I've got now is named "loopy.sh" and at the moment just has > a "while [ true ]" loop that does some stuff. > > In the script I can check if it's already running with "ps aux | grep > loopy.sh | wc -l". If it is running, I don't know how to kill it. It > shows up like this in ps: > $ ps aux | grep loopy > liney 1000 0.0 0.1 18644 572 std S 9:52PM 0:00.00 > bash ./loopy.sh > > I don't think "killall bash" would be a good idea because it could > kill other stuff too. What's the best way to identify and kill the > right script? > > Thank you! > -- > Michael Moore
Use a PID file. Something like (I'm doing this off the top of my head--double check my syntax): ------------------------ #!/bin/bash if [ -e /tmp/mypidfile ] ; then kill -9 `cat /tmp/mypidfile` rm /tmp/mypidfile echo "Already running, AAAaaaa" exit -1 fi echo "I'm the only one running, so now I'll do some stuff..." echo `(some command to get your own PID)` > /tmp/mypidfile ... (do stuff) ... rm /tmp/mypidfile exit 0 --------------------- ~ Nathan -------------------- BYU Unix Users Group http://uug.byu.edu/ The opinions expressed in this message are the responsibility of their author. They are not endorsed by BYU, the BYU CS Department or BYU-UUG. ___________________________________________________________________ List Info: http://uug.byu.edu/cgi-bin/mailman/listinfo/uug-list
