[SOLVED] Struggling with exec() and sudo

[LuAn]

I want to run a couple of linux commands from within PHP but they need root access to run them.

 

The following code works and tells me that I am 'apache':

 

[pre]$output = exec('/usr/bin/whoami');[/pre]

 

The following code does not work and $output is empty:

 

[pre]$output = exec('/usr/bin/sudo /usr/bin/whoami');[/pre]

 

I have added the following line to /etc/sudoers

 

[pre]apache ALL = (root) NOPASSWD: /usr/bin/whoami[/pre]

 

I'm on Fedora Core 6 but selinux is set to permissive so it's not that.  I've spent the last 6 hours scouring the web for an answer but everything that I'm seeing tells me that what I've done is the way to do it.  Any ideas what I'm doing wrong?

[LuAn]

I just nailed this.  The breakthough came when I tried:

 

[PRE]$output = exec('/usr/bin/sudo /usr/bin/whoami 2>&1');[/PRE]

 

The result should be 'root' but what I got, courtesy of the bit on the end, was this: 'sudo: sorry, you must have a tty to run sudo'

 

A search on that told me that the issue related to a setting in /etc/sudoers which is used in Fedora Core 6 namely:

 

[PRE]Defaults    requiretty[/PRE]

 

Apparenly FC6 is the only OS that has that setting (which explains why I was struggling to find any information about what was causing the problem).