Hi, I have a perl code that runs a ssh process that will run forever(in a loop) until it is killed. I do it by a fork and then the child process is using "open" to run the ssh, then the child process waits for the open's output and prints it on the screen, I want to print it on a canvas I opened in the original parent process.

Problem is, it's not working, i made sure that the child process has the right reference to the text widget but for some reason, the text is not displayed on the canvas.

Code: 

my $TextS=$BB5_frame->Scrolled("Text", -wrap=>'none')->pack();
$BT5_frame->Button(-text => "RUN", -command=> sub { 
$c_pid = fork();
if (defined($c_pid) and $c_pid == 0) 
{  
     $SIG{CHLD}='IGNORE';
     my $flag =0;
     $T_pid = open(Out ,"-|" ,"/usr/bin/ssh","-x",$Ap_host,@Pre);
     $SIG{TERM}  = sub {kill ('TERM',$T_pid);
                        close(Out);
                       };
     while (<Out>)
     {
         $TextS->insert('end', $_);
     }
}
})->pack(-side=>'left');

[download]
When I print the lines to STDOUT it's working.

In reply to Piping output from child to parent Tk widget by Ohad

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