Parameters

string $p_filename:

int $p_size:

int $p_mtime:

int $p_perms:

string $p_type:

int $p_uid:

int $p_gid:

Return value

bool

1 call to Archive_Tar::_writeHeaderBlock()

Archive_Tar::_addString in modules/system/system.tar.inc

File

modules/system/system.tar.inc, line 1545

Class

Archive_Tar

Code

public function _writeHeaderBlock($p_filename, $p_size, $p_mtime = 0, $p_perms = 0, $p_type = '', $p_uid = 0, $p_gid = 0) {
    $p_filename = $this->_pathReduction($p_filename);
    if (strlen($p_filename) > 99) {
        if (!$this->_writeLongHeader($p_filename, false)) {
            return false;
        }
    }
    if ($p_type == "5") {
        $v_size = sprintf("%011s", DecOct(0));
    }
    else {
        $v_size = sprintf("%011s", DecOct($p_size));
    }
    $v_uid = sprintf("%07s", DecOct($p_uid));
    $v_gid = sprintf("%07s", DecOct($p_gid));
    $v_perms = sprintf("%07s", DecOct($p_perms & 0777));
    $v_mtime = sprintf("%11s", DecOct($p_mtime));
    $v_linkname = '';
    $v_magic = 'ustar ';
    $v_version = ' ';
    if (function_exists('posix_getpwuid')) {
        $userinfo = posix_getpwuid($p_uid);
        $groupinfo = posix_getgrgid($p_gid);
        if ($userinfo === false || $groupinfo === false) {
            $v_uname = '';
            $v_gname = '';
        }
        else {
            $v_uname = $userinfo['name'];
            $v_gname = $groupinfo['name'];
        }
    }
    else {
        $v_uname = '';
        $v_gname = '';
    }
    $v_devmajor = '';
    $v_devminor = '';
    $v_prefix = '';
    $v_binary_data_first = pack("a100a8a8a8a12A12", $p_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime);
    $v_binary_data_last = pack("a1a100a6a2a32a32a8a8a155a12", $p_type, $v_linkname, $v_magic, $v_version, $v_uname, $v_gname, $v_devmajor, $v_devminor, $v_prefix, '');
    // ----- Calculate the checksum
    $v_checksum = 0;
    // ..... First part of the header
    for ($i = 0; $i < 148; $i++) {
        $v_checksum += ord(substr($v_binary_data_first, $i, 1));
    }
    // ..... Ignore the checksum value and replace it by ' ' (space)
    for ($i = 148; $i < 156; $i++) {
        $v_checksum += ord(' ');
    }
    // ..... Last part of the header
    for ($i = 156, $j = 0; $i < 512; $i++, $j++) {
        $v_checksum += ord(substr($v_binary_data_last, $j, 1));
    }
    // ----- Write the first 148 bytes of the header in the archive
    $this->_writeBlock($v_binary_data_first, 148);
    // ----- Write the calculated checksum
    $v_checksum = sprintf("%06s ", DecOct($v_checksum));
    $v_binary_data = pack("a8", $v_checksum);
    $this->_writeBlock($v_binary_data, 8);
    // ----- Write the last 356 bytes of the header in the archive
    $this->_writeBlock($v_binary_data_last, 356);
    return true;
}

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