On Wed, Aug 09, 2017 at 02:06:20PM -0400, bruce wrote: > Hey peeps. > > From a fed/centos cmdline... > > pgrep -f "foo" | wc -l > > will return 0 -- if "foo" doesn't exist in the procTBL, and something > else if "foo" is running. > > The curiousity... When I have a simple php > > <?php > > $f="pgrep -f 'foo' | wc -l"; > $t=`$f`; > print $t > > ?> > > $t isn't 0!! -- it's actually 1, or something else if foo is running.. > > Any ideas why?? I've used the different methods php provides to "run" > shell/.cmdline processes. I get the same results. > > Now.. I can do something like > ps aux | grep 'foo' | grep -v 'grep' | wc -l > and get the correct results within the php as well as the shell. > > Didn't find anything via the 'net or SO on this.. > > Thoughts/comments?? The -f option to pgrep says to look at the command and it arguments. If you are looking for a command NAMED "foo" and have another command with "foo" as an argument, "pgrep -f" may list that as well. Two alternatives, drop the "-f" to look at only the cmd name or run your pgrep as "pgrep -f '[f]oo'". That cmd line does not contain "foo" but still searches for "foo". jl -- Jon H. LaBadie jonfu@xxxxxxxxxx _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
