On Wed, 2017-08-09 at 14:06 -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??
I suggest you run the PHP script with the pipe to 'wc' changed to save
the output somewhere, then look at it.
poc
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