Shell Programming and Scripting

Okay on further investigation it looks like the following command is not being executed:


pen(SMP, "/usr/local/bin/sshpass -p test ssh test.com -l root /usr/contrib/bin/serverinfor -b |") || die "Failed: $!\n";


Hence that is why I do not see any output on the browser? Is there any other way of calling this function?

What is the error message received or logged ( using $! )? That should be a hint

Well the issue is that am not getting any error messages.......

You have not provided the correct log line. This line is for the image 'page-background.png' indicates the URL is being redirected (to the script??). The redirection is either not completing (and thus no long line is generated) or the log line appears later.

Try simply including an "exit(0);" after your initial "print Content-type" line. You should then see a line in the logs with status 200. Keep moving the "exit()" line and doing a refresh until the log line is no longer 200 (or does not appear).

Okay tried the suggestion and here are the logs entries.

10.10.10.10 - - [12/Dec/2008:20:17:13 +0000] "GET /favicon.ico HTTP/1.1" 404 287 "http://10.10.10.1/cgi-bin/test.pl" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.2 Safari/525.20.1"
10.10.10.10 - - [12/Dec/2008:20:17:50 +0000] "GET /cgi-bin/test.pl HTTP/1.1" 200 283 "-" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.2 Safari/525.20.1"
10.10.10.10 - - [12/Dec/2008:20:17:50 +0000] "GET /favicon.ico HTTP/1.1" 404 287 "http://10.10.10.1/cgi-bin/test.pl" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.2 Safari/525.20.1"
10.10.10.10- - [12/Dec/2008:20:17:50 +0000] "GET /icons/test.gif HTTP/1.1" 200 4110 "http://10.10.10.1/cgi-bin/test.pl" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.2 Safari/525.20.1"
10.10.10.10 - - [12/Dec/2008:20:17:50 +0000] "GET /icons/page-background.png HTTP/1.1" 200 17055 "http://10.10.10.1/cgi-bin/test.pl" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_5; en-us) AppleWebKit/525.18 (KHTML, like Gecko) Version/3.1.2 Safari/525.20.1"

I tried different perl package to just open a ssh shell to one of the server and executed it via the url and any ideas how to fix this issue? Since if this works, then I can replace my above script with this approach:

#!/usr/bin/perl -w

use warnings;
use strict;
use Socket;
#use Net::SSH::Perl;
use Net::OpenSSH;


my $ssh = Net::OpenSSH->new('root:root@10.10.10.1');
$ssh->error and die "Can't ssh : " . $ssh->error;

my $output = $ssh->capture( "ls -la");
$ssh->error and
warn "operation didn't complete successfully: ". $ssh->error;
print $output;


The Error when executed from URL is:
[Fri Dec 12 20:26:52 2008] [error] [client 10.10.10.10] Can't ssh : unable to stablish master ssh connection: the authenticity of the target host can't be established, try loging manually first at /var/www/cgi-bin/test2.pl line 20.
[Fri Dec 12 20:26:52 2008] [error] [client 10.10.10.10] Premature end of script headers: test2.pl



NOTE: The command works fine when executed from command line.......

the one in red is the one you want to watch for. In the example you provided, the code is 200, so your request worked.