#!@prefix@/bin/php -Cq
<?php // -*- PHP -*-

// {{{ setup

define('S_IFDIR', 0040000); // Directory
define('S_IFCHR', 0020000); // Character device
define('S_IFBLK', 0060000); // Block device
define('S_IFREG', 0100000); // Regular file
define('S_IFIFO', 0010000); // FIFO
define('S_IFLNK', 0120000); // Symbolic link
define('S_IFSOCK', 0140000); // Socket

require_once "PEAR.php";
require_once "Archive/Tar.php";
require_once "Console/Getopt.php";

// }}}
// {{{ options

$verbose    = false;
$op_create  = false;
$op_list    = false;
$op_extract = false;
$use_gzip   = false;
$file       = '';

$progname = basename(array_shift($argv));

$options = Console_Getopt::getopt($argv, "h?ctxvzf:");
if (PEAR::isError($options)) {
    usage($options);
}

$opts = $options[0];
foreach ($opts as $opt) {
    switch ($opt[0]) {
        case 'v': {
            $verbose = true;
            break;
        }
        case 'c': {
            $op_create = true;
            break;
        }
        case 't': {
            $op_list = true;
            break;
        }
        case 'x': {
            $op_extract = true;
            break;
        }
        case 'z': {
            $use_gzip = true;
            break;
        }
        case 'f': {
            $file = $opt[1];
            break;
        }
        case 'h':
        case '?': {
            usage();
            break;
        }
    }
}

if ($op_create + $op_list + $op_extract > 1) {
    usage("Only one of -c, -t and -x can be specified at once!");
}

if ($op_create + $op_list + $op_extract == 0) {
    usage("Please specify either -c, -t or -x!");
}

if (empty($file)) {
    if ($op_create) {
        $file = "php://stdout";
    } else {
        $file = "php://stdin";
    }
}

// }}}

$tar = new Archive_Tar($file, $use_gzip);
$tar->setErrorHandling(PEAR_ERROR_DIE, "$progname error: %s\n");

if ($op_create) {
    do_create($tar, $options[1]);
    $tar->create($options[1]);
} elseif ($op_list) {
    do_list($tar, $verbose);
} elseif ($op_extract) {
    do_extract($tar);
}

// {{{ getrwx()

function getrwx($bits) {
    $str = '';
    $str .= ($bits & 4) ? 'r' : '-';
    $str .= ($bits & 2) ? 'w' : '-';
    $str .= ($bits & 1) ? 'x' : '-';
    return $str;
}

// }}}
// {{{ getfiletype()

function getfiletype($bits) {
    static $map = array(
        '-' => S_IFREG,
        'd' => S_IFDIR,
        'l' => S_IFLNK,
        'c' => S_IFCHR,
        'b' => S_IFBLK,
        'p' => S_IFIFO,
        's' => S_IFSOCK,
        );
    foreach ($map as $char => $mask) {
        if ($bits & $mask) {
            return $char;
        }
    }
}

// }}}
// {{{ getuser()

function getuser($uid) {
    static $cache = array();
    if (isset($cache[$uid])) {
        return $cache[$uid];
    }
    if (function_exists("posix_getpwuid")) {
        if (is_array($user = @posix_getpwuid($uid))) {
            $cache[$uid] = $user['name'];
            return $user['name'];
        }
    }
    $cache[$uid] = $uid;
    return $uid;
}

// }}}
// {{{ getgroup()

function getgroup($gid) {
    static $cache = array();
    if (isset($cache[$gid])) {
        return $cache[$gid];
    }
    if (function_exists("posix_getgrgid")) {
        if (is_array($group = @posix_getgrgid($gid))) {
            $cache[$gid] = $group['name'];
            return $group['name'];
        }
    }
    $cache[$gid] = $gid;
    return $gid;
}

// }}}
// {{{ do_create()

function do_create(&$tar, &$files)
{
    $tar->create($files);
}

// }}}
// {{{ do_list()

function do_list(&$tar, $verbose)
{
    static $rwx = array(4 => 'r', 2 => 'w', 1 => 'x');
    $files = $tar->listContent();
    if (is_array($files) && sizeof($files) > 0) {
        foreach ($files as $file) {
            if ($verbose) {
                $fm = (int)$file['mode'];
                $mode = sprintf('%s%s%s%s', getfiletype($fm),
                                getrwx(($fm >> 6) & 7), getrwx(($fm >> 3) & 7),
                                getrwx($fm & 7));
                $owner = getuser($file['uid']) . '/' . getgroup($file['gid']);
                printf("%10s %-11s %7d %s %s\n", $mode, $owner, $file['size'],
                       date('Y-m-d H:i:s', $file['mtime']), $file['filename']);
            } else {
                printf("%s\n", $file['filename']);
            }
        }
    }
}

// }}}
// {{{ do_extract()

function do_extract(&$tar, $destdir = ".")
{
    $tar->extract($destdir);
}

// }}}
// {{{ usage()

function usage($errormsg = '')
{
    global $progname;
    $fp = fopen("php://stderr", "w");
    if ($errormsg) {
        if (PEAR::isError($errormsg)) {
            fwrite($fp, $errormsg->getMessage() . "\n");
        } else {
            fwrite($fp, "$errormsg\n");
        }
    }
    fwrite($fp, "$progname [-h|-?] {-c|-t|-x} [-z] [-v] [-f file] [file(s)...]
Options:
      -h, -?   Show this screen
      -c       Create archive
      -t       List archive
      -x       Extract archive
      -z       Run input/output through gzip
      -f file  Use <file> as input or output (default is stdin/stdout)

");
    fclose($fp);
    exit;
}

// }}}

?>