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When calling the php function exec the output of the stderr is going the default error_log of apache. I have a server with many TYPO3 installations. And TYPO3 uses exec alot for image handling. My problem is that I get tons of 

"/usr/local/bin/gm identify: Improper image header (typo3temp/pics/...."

or

"/usr/local/bin/gm convert: Unable to open file ..."

in the error_log. But there is no timestamp, no process ID, no process owner, no IP or anything else which could really help. Just the output.

Is there a way to add some useful information?

Snoofer
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  • This might be helpfull for you http://stackoverflow.com/questions/2320608/php-stderr-after-exec – Andresch Serj Apr 07 '14 at 08:19
  • Thanks. But this doesn't really helps. I know that I can redirect stderr in my own scripts. But I'm talking about scripts which aren't coded by me. So I'm searching for more general solution without modifying any php code. – Snoofer Apr 07 '14 at 09:07
  • So you want to manipulate how apache logs errors right? http://httpd.apache.org/docs/2.2/logs.html – Andresch Serj Apr 07 '14 at 12:15
  • In general ... yes. But apache/php don't use the configured log format when php exec function outputs something to stderr ;-( – Snoofer Apr 07 '14 at 13:00

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