Greetings Monks, I would like to seek your help in a doubt I have. In the below code, @hosts stores the details of devices like RTR, HUB etc which it tries to connect to. When I say devices I mean 'n' number of devices. I try to connect to all of these devices by forking and writing a query which is in XML through $socket->print($query); when 
while (my $line = $socket->getline() ) {
                     chomp $line;
                     print {$file_handle} $line;
                 }

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is in execution, I believe that the getline() function reads the result which the device writes on its write end. Now my point of concern is for how long will the function getline() wait. I mean that the device may take time in processing the query and writing to the write end. Also what if the device never writes anything to its write end. I am not able to find exactly where this getline() function is defined or explained. Kindly help :) 
foreach my $child (@hosts) {

             my $ident = $child->ident();

             my $pid = fork;
             if ( !$pid ) {

                 my $socket = IO::Socket::INET->new(
                     PeerAddr => $child->get_ip(),
                     PeerPort => $child->get_port(),
                     Proto    => 'tcp',
                     Timeout  => $child->get_timeout(),
                 );

                 my @returned_lines;
                 ## no critic(RequireBriefOpen)
                 open my $file_handle, q{>}, CCI::data_path() . $reque
+st->get_session_id() .  q{/} . $child->get_ip() . '.log';

                 if ( !$socket ) {
                     $request->error( sprintf 'Unable to connect to %s
+: %s',
                         $child->get_ip(), $! );
                     $returned_lines[0] =  sprintf 'ERROR Unable to co
+nnect to %s E    RROR',$child->get_ip();
                     print {$file_handle} join q{}, @returned_lines
                         or $request->error('Cannot print to per LGP f
+ile');
                     CORE::exit 0;
                 }

                 $query = $parser->parse_string($query)->toString(1);
                 $socket->print($query);

                 while (my $line = $socket->getline() ) {
                     chomp $line;
                     print {$file_handle} $line;
                 }

                 close $file_handle;
                 # use critic
                 #print {$parent_handle} join q{}, @returned_lines
                 #    or $request->error('Cannot return values through
+ pipe');
                 CORE::exit 0;
             } else {
                 push @children, $pid;
             }
         }

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In reply to IO::Socket::INET->getline() function by akagrawal3

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