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Re: problems with exec() [message #177708 is a reply to message #177707]

Mon, 16 April 2012 05:17

J.O. Aho
Messages: 194
Registered: September 2010

Karma:

Senior Member

M. Strobel wrote:
> Am 16.04.2012 00:16, schrieb M. Strobel:
>> Am 15.04.2012 19:43, schrieb J.O. Aho:
>>> 7segment wrote:
>>>> Hi.
>>>>
>>>> I have an interesting problem and I cannot figure out what the problem
>>>> might be.
>>>>
>>>> This does not produce any output:
>>>>
>>>> $response = exec('ifconfig');
>>>> echo $response;
>>>>
>>>> Although when I try other commands, I get a response on the screen. So I
>>>> don't get what's so special about ifconfig.
>>>>
>>>> Could anyone help please?
>>>
>>> ifconfig usually residence in /sbin (some GNU/Linux distribution are in the migration
>>> path of moving it to /usr/sbin), this directory is never in a normal users or a
>>> daemon users $PATH, so you need to give the whole path to this binary to be able to
>>> run it.
>>>
>>> By default the file is executional by all users, but someone may have changed
>>> permissions or setup ACL rules with for example SELinux.
>>>
>>
>> I can tell that on opensuse it it not executable by normal users.
>>
>
> Correct is: on suse it is not found on the path. When called with path /sbin/ifconfig
> in a shell it outputs the NIC configuration. When called like that it outputs nothing:
>
> php> $a = exec('/sbin/ifconfig');
> php> echo $a;
> php> var_dump($a);
> string(0) ""

Think the ifconfig makes a bit environment check and wants a shell, use
shell_exec instead and you will see the output.

--

//Aho

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[Message index]

		problems with exec() By: 7segment on Sun, 15 April 2012 16:37
		Re: problems with exec() By: 7segment on Sun, 15 April 2012 16:47
		Re: problems with exec() By: Jerry Stuckle on Sun, 15 April 2012 17:34
		Re: problems with exec() By: J.O. Aho on Sun, 15 April 2012 17:43
		Re: problems with exec() By: M. Strobel on Sun, 15 April 2012 22:16
		Re: problems with exec() By: M. Strobel on Sun, 15 April 2012 22:22
		Re: problems with exec() By: J.O. Aho on Mon, 16 April 2012 05:17
		Re: problems with exec() By: Une Bvue on Mon, 16 April 2012 08:07
		Re: problems with exec() By: J.O. Aho on Mon, 16 April 2012 17:29
		Re: problems with exec() By: Une Bvue on Wed, 18 April 2012 13:44
		Re: problems with exec() By: J.O. Aho on Wed, 18 April 2012 16:02
		Re: problems with exec() By: Une Bvue on Wed, 18 April 2012 17:43
		Re: problems with exec() By: J.O. Aho on Wed, 18 April 2012 18:37
		Re: problems with exec() By: Une Bvue on Wed, 18 April 2012 21:31
		Re: problems with exec() By: Kim Andr Aker on Mon, 16 April 2012 11:27
		Re: problems with exec() By: M. Strobel on Mon, 16 April 2012 12:43

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