#!/opt/perl5/bin/perl -w
use strict;
use CGI;

# set path, instead of putting it in the open statement
$ENV{'PATH'} = "/usr/bin:/opt/perl5/bin/:";

#location of product_gen.pl, plus arguments
my $gen_script = "/path/to/server/product_gen.pl -prfv";

# Create a new CGI object
my $cgi = new CGI;

# Output HTML header to browser
print $cgi->header('text/html');

print qq{<h4>script executing</h4>};

open(PRODUCT_GEN, "nohup perl $gen_script |") or die "Error: $!\n";

while (<PRODUCT_GEN>)
{
  print $_, "<br>";
}

close(PRODUCT_GEN);