I'd start with a dummy child, make the other children wait for it, and then kill it e.g.

#!C:\Perl\bin\perl.exe

use warnings;
use strict;

my @drive_dir = (
  'perl /a/dir_file_create.txt',
  'perl /b/dir_file_create.txt',
  'perl /c/dir_file_create.txt');

my $pid0 = open my $nh, 'type nul |'; # spawn dummy child
my @pid;
for ( @drive_dir ) {
   my $pid;
   $pid = fork
     and push @pid, $pid;
   unless( $pid ) { # non-dummy child
      waitpid $pid0, 0; # wait for dummy child to die
      system( 'perl $_' );
      exit;
   }
}
# parent
sleep 1; #allow children a little time to start
<$nh>;
close $nh; # kills dummy child
waitpid $_, 0 for ( @pid ); # keep parent alive until all children don
+e
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.