If you require that you parent script have full control over the 'blastall' child, I really advise you to use fork, for exemple : 
my $pid = fork;
die unless defined $pid;

if ($pid) {
  # Parent. Do whatever you want
} else {
  # Child
  do 'blastall.pl';
}

[download]

--
zejames

In reply to Re: How to get child pid from backtics by zejames
in thread How to get child pid from backtics by Hena

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