Crond Emails Message: "sh: /chmod: No such file or directory"

[Stephen]

Every five minutes crond is sending me this email:

From root@frox.example.com  Thu Nov 17 11:50:02 2011
X-Original-To: root
From: root@frox.example.com (Cron Daemon)
To: root@frox.example.com
Subject: Cron <root@example> /usr/bin/php5 -q /var/www/froxlor/scripts/froxlor_master_cronjob.php
Content-Type: text/plain; charset=ANSI_X3.4-1968
X-Cron-Env: <PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin>
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <LOGNAME=root>
Date: Thu, 17 Nov 2011 11:50:01 -0500 (EST)

sh: /chmod: No such file or directory

 

I believe this may be related to the problem I have I posted about at:

http://redmine.froxlor.org/issues/978

 

How can I find out what file path chmod does not find?

[d4f]

This error does not mean that chmod cannot find a path, but that it cannot find the binary 'chmod' unter the system root,

which is perfectly normal since the file is located in /bin/

 

Now the question remains; WTF is it trying to do? =)

Easiest way to get it's start parameters is by creating a file called "chmod" in the absolute root of your server, containing:

#!/bin/sh
echo $@ > /chmod.log
/bin/chmod $@

 

Then make it executable by "chmod +x /chmod" and either wait for the cron to run or start it with "php5 -q /var/www/froxlor/scripts/froxlor_master_cronjob.php --force"

Afterwards please post the contents of /chmod.log

 

If this is not very informative, you should install the PHP XDebug Extension and enable it on the CLI by adding the following options to php-cli's php.ini:

xdebug.profiler_enable = true
xdebug.profiler_output_dir = "/tmp/froxlorcron/"
xdebug.profiler_output_name = "froxlor_master_cronjob.php.%u"

and create the folder /tmp/froxlorcron

 

Then, run the cronjob and run the generated /tmp/froxlorcron/froxlor_master_cronjob.php.UNIXTIME through KCacheGrind or WinCacheGrind to see where it's been calling chmod.

 

 

Note that you should disable xdebug afterwards again as it slows down the execution quite a lot and requires a fair chunk of disk, cpu and memory,