Archive_Tar::_writeHeader
public function Archive_Tar::_writeHeader
public Archive_Tar::_writeHeader($p_filename, $p_stored_filename)
Parameters
string $p_filename:
string $p_stored_filename:
Return value
bool
File
- modules/system/system.tar.inc, line 1392
Class
Code
public function _writeHeader($p_filename, $p_stored_filename) { if ($p_stored_filename == '') { $p_stored_filename = $p_filename; } $v_reduce_filename = $this->_pathReduction($p_stored_filename); if (strlen($v_reduce_filename) > 99) { if (!$this->_writeLongHeader($v_reduce_filename)) { return false; } } $v_info = lstat($p_filename); $v_uid = sprintf("%07s", DecOct($v_info[4])); $v_gid = sprintf("%07s", DecOct($v_info[5])); $v_perms = sprintf("%07s", DecOct($v_info['mode'] & 000777)); $v_mtime = sprintf("%011s", DecOct($v_info['mtime'])); $v_linkname = ''; if (@is_link($p_filename)) { $v_typeflag = '2'; $v_linkname = readlink($p_filename); $v_size = sprintf("%011s", DecOct(0)); } elseif (@is_dir($p_filename)) { $v_typeflag = "5"; $v_size = sprintf("%011s", DecOct(0)); } else { $v_typeflag = '0'; clearstatcache(); $v_size = sprintf("%011s", DecOct($v_info['size'])); } $v_magic = 'ustar '; $v_version = ' '; if (function_exists('posix_getpwuid')) { $userinfo = posix_getpwuid($v_info[4]); $groupinfo = posix_getgrgid($v_info[5]); $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", $v_reduce_filename, $v_perms, $v_uid, $v_gid, $v_size, $v_mtime ); $v_binary_data_last = pack( "a1a100a6a2a32a32a8a8a155a12", $v_typeflag, $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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https://api.drupal.org/api/drupal/modules!system!system.tar.inc/function/Archive_Tar::_writeHeader/7.x