Executing a binary on server

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November 13th, 2012, 09:16 PM

BobS0327

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Join Date: Oct 2012

Posts: 118

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Executing a binary on server

I am trying to execute a binary on a server from a webpage.

My web page code is as follows:

Code:

<html>
<body>
<form action="" method="post">
    <button type="submit" name="button">Turn on Front Porch Light</button>
</form>

<?php 
$var1 = "14";
$var2 = "on";
$var3 = "3m";

 if (isset($_POST['button'])) { exec("'./www/var/HAI.pl'. '$var1, $var2, $var3"); print($status);  } 

?>

</body>
</html>

and the server perl script is as follows:

Code:

#!/usr/bin/perl -w

my $var1 = '';
my $var2 = '';
my $var3 = '';
$var1 = $ARGV[0];
$var2 = $ARGV[1];
$var3 = $ARGV[2];
print "VAR1: ".$var1."\n";
print "VAR2: ".$var2."\n";
print "VAR3: ".$var3."\n";
system("/bin/hai", $var1, $var2, $var3);

I am using the Linux Zoneminder CCTV security camera software which provides a web page for viewing the security cameras. What I am trying to do is add buttons to the web page which would allow me to turn exterior floodlights on/off in the vicinity of the cameras.

I can successfully execute the perl script locally at the server and turn the floodlights on/off but I cannot successfully execute it from the web page.

I would greatly appreciate any assistance in getting this mod to work.

November 13th, 2012, 09:25 PM

requinix

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Could be a variety of things.
1. exec() is disabled
2. The path to the script isn't "www/var/HAI.pl."
3. The shell is complaining about the unclosed quote
4. The script isn't executable
5. The script is executing just fine but you can't tell because you're not capturing its output or exit code

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November 14th, 2012, 07:24 AM

BobS0327

Contributing User

Join Date: Oct 2012

Posts: 118

Time spent in forums: 3 Days 18 h 48 m 29 sec
Reputation Power: 44

I found the source of the problem. It was a malformed exec statement. The statement should look as follows:

Code:

if (isset($_POST['ShedFloodLight33'])) 
{ 
$var1 = "33";
$var2 = "on";
$var3 = "3m";
exec("perl /var/www/HAI.pl $var1 $var2 $var3"); 
}

My incorrect statement:

Code:

 if (isset($_POST['button'])) { exec("'./www/var/HAI.pl'. '$var1, $var2, $var3"); print($status);  }

Executing a binary on server

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