#!/usr/bin/perl

package Shell;

use strict;
use warnings;
use OpenBSD::Pledge;
use OpenBSD::Unveil;
use Data::Dumper;

my $authlog = "/var/log/authlog";
my $etcpasswd = "/etc/master.passwd";
my @etcpasswd = readarray($etcpasswd);
my @users;
foreach my $line (@etcpasswd) {
	if ($line =~ /^([^:]+):[^:]+:([^:]+)/) {
		my ($username, $uid) = ($1, $2);
		if ($uid > 1000) {
			push(@users, $username);
		}
	}
}
my @files = ("/var/log/authlog");
push(@files, glob q("/var/log/authlog.?"));
push(@files, glob q("/var/log/authlog.1?"));
foreach my $user (@users) {
	my $lastseen;
	foreach my $file (@files) {
		my @logs = readarray($file);
		my @seen = grep(/$user/, @logs);
		if (scalar(@seen) && $seen[0] =~ /^(\w+ \d+ \d\d:\d\d:\d\d)/) {
			$lastseen = $1;
			print "$user => $lastseen\n";
			last;
		}
	}
	if (!defined($lastseen)) {
		print "$user => Never logged in\n";
	}
}
#warn Dumper \$loglines[1];
sub readarray {
	my ($filename) = @_;
	open(my $fh, '<', $filename) or die "Could not read file '$filename' $!";
	chomp(my @lines = <$fh>);
	close $fh;
	return @lines;
}