#!/usr/local/bin/perl

if ($#ARGV < 1) {
    die "usage master counter command comandargs ... \n";
}

$count = $ARGV[0]; shift @ARGV;
@command = @ARGV;
$file = pop(@command);
undef @ARGV;
$debug = 0;

for($i = 0; $i < $count; $i ++) {
    @c = (@command, "$file.$i");
    warn "Start process: $i @c\n" if $debug;
    open("OUT$i", "| @c") || die "open @c\n";
    select("OUT$i"); $| = 1;
}
select(STDOUT);

$n = 0;
while(<>) {
    $o = 'OUT' . ($n % $count);
    print $o $_;
    warn "$o $_" if $debug;
    $n++
}

for($i = 0; $i < $count; $i ++) {
    warn "Close process $i\n" if $debug;
    close("OUT$i") || warn "close OUT$i: $!\n";
}