turn2me5 has asked for the wisdom of the Perl Monks concerning the following question:

Hi , I am required to execute a command from my windows machine on to a Linux machine. Currently I am using Net::Telnet package for that. <pr> Now that I want to check the status of that command on my Windows machine. Is there some way where in I can return a magic string to my windows machine on the basis of value of $? variable on Linux machine. I am attaching my code here. 

$username="imail1";
$passwd="imail1";
use Net::Telnet ();
$t = new Net::Telnet (Timeout => 10);
$t->open("172.16.14.74");
$t->print($username);
$t->print($passwd);
sleep(5);
open(FHH, ">output.txt");
print FHH $t->cmd("cp opwv/config/config.db ./");

$flag=1;
close(FHH);

open(FH,"<output.txt");
 while(<FH>)
 {
    if($_ =~ "ERROR"){
        $flag = 0;
    }    
}


if ($flag == 0) {
      print "Fail";
}
else {
    print "Pass";
}    

close(FH);
unlink("output.txt");

[download]
Please let me know whether I can modify the same code or I need to use some totally different module than Net::Telnet..
Prompt reply would be appreciated.. :)

Replies are listed 'Best First'.
Re: Want to communicate status of the last command to Windows machine
by vladdrak (Monk) on Dec 19, 2006 at 07:20 UTC
    The environment variable %ERRORLEVEL% typically contains the exit status of the last running process. I say typically as it's up to the executable to properly exit with an actual error code.
[reply]
      Right vladdrak So the problem is that how to bring that exit status back to my Windows machine, through the code above I am just telnetting to a remote machine and executing a command der Now I want to bring back the status of the process back to the Windows machine and that is the issue....!
[reply]
        This code works for me against a debian etch machine -- should be very similar to another flavor of Linux, though. (You also might consider the Net::SSH module..!): 
        #!/usr/bin/perl

use strict;
use warnings;

use Net::Telnet;

my $host = "somehost";
my $username = "test";
my $password = "password";

my $t = new Net::Telnet;

$t->dump_log('trace.log');  # detailed packet trace      

$t->open($host) or die "could not connect to $host: $!\n";
$t->print($username);
$t->waitfor('/ssword[:] $/');
$t->print($password);
$t->waitfor('/\$ *$/');

$t->print("cp a b");
$t->getline();   # read prompt
my $stdout = $t->getline();
print "stdout $stdout\n";

$t->print("echo \$?");
$t->getline();   # read prompt
my $exitcode = $t->getline();
print "exit $exitcode\n";

exit($exitcode);

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[reply]
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