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-c, --count Suppress normal output; instead print a count of matching processes. When count does not match any‐ thing, e.g. returns zero, the command will return non-zero value. Looks like you would want to use the --count flag instead of piping to wc: [0:root@elmo CoA3]$ pgrep -f http --count 12 [0:root@elmo CoA3]$ pgrep -f httx --count 0 OR Check the return code: EXIT STATUS 0 One or more processes matched the criteria. 1 No processes matched. 2 Syntax error in the command line. 3 Fatal error: out of memory etc. $last_line = exec('pgrep -f foo 2>&1', $output, $return_code); print $output; print $return_code; Bill On 8/9/2017 5:03 PM, Patrick
O'Callaghan wrote:
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 _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx |
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