I am running these external commands in Windows and I want to run 60 of the 5000 external commands that I have at any given point of time. When one of the external commands is done I need to run another such that I have 60 external commands executing at any given time. Thats the reason why I have been using perl's forkmanager which forks the process and limits them to the max procs (60 in my case). Now all I need is to get the stdout and stderr of these external commands which run from the forked child process.

my $max_procs = 60;
my $pm = new Parallel::ForkManager($max_procs);
foreach my $child ( 0 .. $#cmds ) {  
    my $pid = $pm->start($cmds[$child]) and next;
    # This is where I need to get the stdout and stderr.
    # cmds can be external command which can be windowsexecutable.exe 
+$args (for example perl.exe script.pl $arg1 $arg2)
    system("cmds"); 
    my $Result = $? >> 8;
    $pm->finish($Result); # pass an exit code to finish
  }

  $pm->wait_all_children;

[download]

The above sample code set the $max_procs to 60 and forks 60 child process each executing one system command. All I need is to get the stdout and stderr of the executable executed using the system command into some perl variable

In reply to Re^2: capture stdout and stderr from external command by pankajadvani
in thread capture stdout and stderr from external command by pankajadvani

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