endpwent();
setpwent();
my $name = getpwent();
my @info = getpwent();
my($n, $pass, $uid, $gid) = getpwent();
$name = getpwnam('root');
@info = getpwnam('root');
($name, $pass, $uid, $gid) = getpwnam('root');
$name = getpwuid(0);
@info = getpwuid(0);
($name, $pass, $uid, $gid) = getpwuid(0)
