freebsd-ports/security/amavis-perl/pkg-install.postfix

#!/usr/bin/perl

$user=vscan;
$group=nogroup;

if (`grep ^vscan: /etc/passwd` eq "") {
    print "You need a user \"${user}\".\n";
    if (yesno("Would you like me to create it", "y")) {
        system ("/usr/sbin/pw useradd ${user} -g ${group} -h - -d /nonexistent -s /nonexistent -c \"AMaViS Virus Scanner\" || exit");
        print "Done.\n";
    } else {
        print "Please create it, and try again.\n";
        exit 1;
    };
} else {
    print "You already have a user \"${user}\", so I will use it.\n";
};

sub yesno() {
	my ($mes, $def) = @_;
	print "$mes [$def]? ";
	$answer = <STDIN>;
	chomp($answer);
	if ($answer eq "") {
		$answer = "y";
	};
	if ($answer=~/^y/i) {
		return 1;
	};
	return 0;
};