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Re: Only Allow exec in CLI [message #179194 is a reply to message #179193]

Tue, 25 September 2012 10:35

crankypuss
Messages: 147
Registered: March 2011

Karma:

Senior Member

On 09/25/2012 04:00 AM, The Natural Philosopher wrote:
> crankypuss wrote:
>> On 09/24/2012 06:54 AM, The Natural Philosopher wrote:
>>> Tim Streater wrote:
>>>> In article <k3ph16$7ur$5(at)news(dot)albasani(dot)net>,
>>>> The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>>>>
>>>> > M. Strobel wrote:
>>>> > > Am 24.09.2012 01:14, schrieb cph:
>>>> > >> For security I am looking to add exec() and similar commands to
>>>> > the >> disable functions >> setting in php.ini but I do have a need
>>>> > to execute command line commands >> within a cron job I am writing in
>>>> > PHP.
>>>> > > > The answer is highly dependent on your system setup, as has been
>>>> > said > already. I would start with a check to see if different .ini
>>>> > files
>>>> > > for web server and CLI are in place already.
>>>>
>>>> > I cant imagine why anyone would put PHP in a cron job to start with.
>>>> >
>>>> > Shell script or C, or both...
>>>>
>>>> Neither. PHP is a lot easier to write and I can't see that there's
>>>> going to be a great deal that you can't do in PHP that you can with
>>>> the others. Unless you need every last CPU cycle of course.
>>>>
>>> Actually there is a very great deal you can do in C that you cant do in
>>> PHP.
>>>
>>> Multitasking for one thing.
>>
>> I find PHP to be an order of magnitude more capable than shell scripting.
>>
>> http://php.net/manual/en/function.pcntl-fork.php
>>
>
> yebbut when you have 5 C programs you want to run one after another,
> creating a php wrapper is overkill.

If all the arguments are constants, a shell script might do the job as
long as you don't bother checking results. It seems that "modern"
programmers don't need to check for unusual conditions because of their
godlike programming prowess, but being an old-school geezer it's a
longstanding habit I'm unable to discard as a result of lacking the
godlike wisdom of newbies.

The minute you start attempting to parse arguments or do anything else
in shell scripts you are resorting to sed or awk or whatever and just
doing a simple strpos() becomes a nightmare.

Do whatever suits you, I find that in general shell scripts are for
"ineptocrats" who don't care about error checking and the associated logic.

The overhead for a php "script" is trivial:

#!/usr/bin/php
<?php
// ini_set('include_path', '/usr/lib/php-local');
// include_once 'includes_cli-app.php';
?>

Of course the ini_set and include_once lines are optional for use by
those of us who practice code reuse in addition to other practices like
error checking (and most systems don't have a /usr/lib/php-local). Many
of the subroutines I use in PHP "scripts" are also used by PHP
page-generation code, and most will operate under Windows or Linux.

That means the "wrapper" addition for PHP over and above what would be
needed for a "shell script" amounts to the "<?php" and "?>" lines. For
that you get to use a programming language instead of a script
abomination; mileage varies, obviously.

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[Message index]

		Only Allow exec in CLI By: cph on Sun, 23 September 2012 23:14
		Re: Only Allow exec in CLI By: gordonb.1zi9u on Mon, 24 September 2012 01:06
		Re: Only Allow exec in CLI By: cph on Mon, 24 September 2012 01:30
		Re: Only Allow exec in CLI By: Jerry Stuckle on Mon, 24 September 2012 02:26
		Re: Only Allow exec in CLI By: M. Strobel on Mon, 24 September 2012 11:07
		Re: Only Allow exec in CLI By: The Natural Philosoph on Mon, 24 September 2012 11:43
		Re: Only Allow exec in CLI By: Erwin Moller on Mon, 24 September 2012 12:08
		Re: Only Allow exec in CLI By: Michael Vilain on Mon, 24 September 2012 17:45
		Re: Only Allow exec in CLI By: Michael Fesser on Mon, 24 September 2012 21:57
		Re: Only Allow exec in CLI By: M. Strobel on Mon, 24 September 2012 12:16
		Re: Only Allow exec in CLI By: Tim Streater on Mon, 24 September 2012 12:19
		Re: Only Allow exec in CLI By: The Natural Philosoph on Mon, 24 September 2012 12:54
		Re: Only Allow exec in CLI By: Erwin Moller on Mon, 24 September 2012 14:04
		Re: Only Allow exec in CLI By: The Natural Philosoph on Mon, 24 September 2012 14:14
		Re: Only Allow exec in CLI By: The Natural Philosoph on Mon, 24 September 2012 15:09
		Re: Only Allow exec in CLI By: Tim Streater on Mon, 24 September 2012 18:07
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 08:47
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 10:00
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 10:35
		Re: Only Allow exec in CLI By: Tim Streater on Tue, 25 September 2012 10:44
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 11:31
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 11:27
		Re: Only Allow exec in CLI By: Tim Streater on Tue, 25 September 2012 11:41
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 11:52
		Re: Only Allow exec in CLI By: Tim Streater on Tue, 25 September 2012 13:23
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 13:46
		Re: Only Allow exec in CLI By: Tim Streater on Tue, 25 September 2012 14:55
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 15:13
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 14:05
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 14:05
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 18:16
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 12:10
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 11:45
		Re: Only Allow exec in CLI By: Anders Wegge Keller on Tue, 25 September 2012 12:57
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 13:03
		Re: Only Allow exec in CLI By: Anders Wegge Keller on Tue, 25 September 2012 13:37
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 16:10
		Re: Only Allow exec in CLI By: Anders Wegge Keller on Tue, 25 September 2012 16:25
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 18:24
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 18:38
		Re: Only Allow exec in CLI By: Anders Wegge Keller on Tue, 25 September 2012 18:45
		Re: Only Allow exec in CLI By: Jerry Stuckle on Tue, 25 September 2012 20:08
		Re: Only Allow exec in CLI By: Michael Fesser on Tue, 25 September 2012 13:12
		Re: Only Allow exec in CLI By: Anders Wegge Keller on Tue, 25 September 2012 13:39
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 13:35
		Re: Only Allow exec in CLI By: megazzorro on Mon, 24 September 2012 12:22
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 08:39
		Re: Only Allow exec in CLI By: Martin Leese on Tue, 25 September 2012 15:10
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 15:17
		Re: Only Allow exec in CLI By: crankypuss on Tue, 25 September 2012 18:20
		Re: Only Allow exec in CLI By: The Natural Philosoph on Tue, 25 September 2012 18:32
		Re: Only Allow exec in CLI By: Ryan on Thu, 27 September 2012 17:23

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