well unless i missed something... this code as suggested...ran...but did not do anything or produce any errors that i could find. plus when i try to print it...nothing prints... here is what i have coded. 
#!/usr/bin/perl -T
print "Content-type: text/plain\n\n";
use CGI;
my $query = new CGI;
my $dir = $query->param('dir');
my $zip = $query->param('zip');

die "invalid dir" unless ($dir =~ m/^([a-zA-Z0-9]+)\z/);
my $valid_dir = $1;  # $valid_dir is untainted
die "invalid zip file" unless ($zip =~ m/^([a-zA-Z0-9]+)\z/);
my $valid_zip = $1;

chdir($valid_dir) && system("unzip", $valid_zip);

print $valid_dir;
print $valid_zip;

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In reply to Re^3: HTML Form and Perl by workman_m
in thread HTML Form and Perl by workman_m

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