#!/usr/bin/perl
#
# Copyright (c) 1999 Neil Blakey-Milner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

#my($path) = "/var/qmail";
my($path) = "/usr/local/bin";
my($pkgdir) = "/var/db/pkg";

$do_md5 = 1;
$do_fs = 1;

my(@fsfiles);
my(%files);
my(%fsmd5);
my(%pkgmd5);
my(%pkgname);

if ($do_fs) {
	@fsfiles = `find $path ! -type d`;
	foreach (@fsfiles) {
		chomp;
		s#\Q$path\E/?##;
		$files{$_} = 1;
		chomp($fsmd5{$_} = `md5 -q $path/$_ 2> /dev/null`) if $do_md5 == 1;
	}
}

require "find.pl";
&find('/var/db/pkg');
# Traverse desired filesystems

foreach (sort keys %files) {
	$file = $_;
	$pkgname{$_} =~ s/,$//;
	$files{$_} == 1 && do {
		print "Only on filesystem - $_\n";
		next;
	};
	$files{$_} == 2 && do {
		if ($do_fs == 1) {
			printf "Not on filesystem - $_ from %s\n", $pkgname{$_};
			next;
		}
	};
	if ($do_fs != 1) {
		if (-e "$path/$_") {
			chomp($fsmd5{$_} = `md5 -q $path/$_ 2> /dev/null`) if $do_md5 == 1;
		} else {
			printf "Not on filesystem - $_ from %s\n", $pkgname{$_};
		}
	}
	$files{$_} > 3 && do {
		printf "File $_ owned by multiple packages %s\n", $pkgname{$_};
	};

	if ($do_md5) {
		$pkgmd5tmp = $pkgmd5{$_};
		$fsmd5tmp = $fsmd5{$_};
		if ($fsmd5tmp =~ /^ *$/) {
			$msg = "";
			$msg = ", but it exists" if (-e "$path/$_");
			printf "No filesystem md5 available for $_%s\n", $msg;
			next;
		}
		if ($pkgmd5tmp =~ /^ *$/) {
			print "No package md5 available for $_\n";
			next;
		}
		foreach (split /,/, $pkgmd5tmp) {
			#print "Comparing: $fsmd5tmp $_\n";
			if ($fsmd5tmp !~ /\Q$_\E/) {
				print "For $file, package md5 $_ is " .
					"DIFFERENT from fs md5 of $fsmd5tmp!\n";
			}
		}
	} 
}

exit;

sub wanted {
    my($dev, $ino, $mode, $nlink, $uid, $gid);
    my($cwd, $tmp);
    (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
    -f _ &&
    /^\+CONTENTS$/ || return;
    open(CNT, "$name");
    chomp($pkg = `dirname $name`);
    chomp($pkg = `basename $pkg`);
    $cwd = "";
    $lastfile = "";
    while(<CNT>) {
	chomp;
        /^\@cwd (.*)$/ && do {
		$cwd = $1;
		next;
	};
	s#^\@comment MD5:## && do {
		return if $cwd =~ /^\.?$/;
		$tmp = "$cwd/$lastfile";
		if ($tmp =~ s#^\Q$path\E/?##) {
			$pkgmd5{$tmp} .= "$_,";
		}
		next;
	};
        /^[^@]/ && do {
		$lastfile = $_;
		return if $cwd =~ /^\.?$/;
		$tmp = "$cwd/$_";
		if ($tmp =~ s#^\Q$path\E/?##) {
			$files{$tmp} += 2;
			$pkgname{$tmp} .= "$pkg,";
		}
	};
    }
    close(CNT);
}