/**
* Create a symlink and return the Fs interface.
*
* @param string $target
* @param string $link
* @param int $flags Fs::% options as binary set
* @param string $default Type for $target if file does not exist.
* @return Fs_Node
*/
public static function symlink($target, $link, $flags = 0, $default = null)
{
if (is_link($link) && $flags & self::OVERWRITE) {
unlink($link);
}
if (!@symlink($target, $link)) {
throw new Fs_Exception("Failed to create symlink '{$link}' to '{$target}'", error_get_last());
}
return Fs::get($link, $default);
}
/**
* Copy or rename/move this file.
*
* @param callback $fn copy or rename
* @param Fs_Dir $dir
* @param string $name
* @param int $flags Fs::% options as binary set
* @return Fs_Node
*/
protected function doCopyRename($fn, $dir, $name, $flags = 0)
{
if (empty($name) || $name == '.' || $name == '..' || strpos('/', $name) !== false) {
throw new SecurityException("Unable to {$fn} '{$this->_path}' to '{$dir}/{$name}': Invalid filename '{$name}'");
}
if (!$dir instanceof Fs_Dir) {
$dir = Fs::dir($dir, dirname($this->_path));
}
if (!$dir->exists()) {
if (~$flags & Fs::MKDIR) {
throw new Fs_Exception("Unable to " . ($fn == 'rename' ? 'move' : $fn) . " '{$this->_path}' to '{$dir}/': Directory does not exist");
}
$dir->create();
} elseif ($dir->has($name)) {
$dest = $dir->{$name};
if ($dest instanceof Fs_Dir && !$dest instanceof Fs_Symlink && count($dest) != 0) {
throw new Fs_Exception("Unable to {$fn} '{$this->_path}' to '{$dest->_path}': Target is a non-empty directory");
}
if ($flags & Fs::UPDATE == Fs::UPDATE && $dest['ctime'] >= $this['ctime']) {
return false;
}
if (~$flags & Fs::OVERWRITE) {
throw new Fs_Exception("Unable to {$fn} '{$this->_path}' to '{$dest->_path}': Target already exists");
}
if ($dest instanceof Fs_Dir) {
if (!@rmdir($dest->_path)) {
throw new Fs_Exception("Failed to {$fn} '{$this->_path}' to '{$dir}/{$name}'", error_get_last());
}
} elseif ($this instanceof Fs_Dir) {
if (!unlink($dest->_path)) {
throw new Fs_Exception("Failed to {$fn} '{$this->_path}' to '{$dir}/{$name}'", error_get_last());
}
}
}
if ($fn == 'copy' && $flags & Fs::NO_DEREFERENCE) {
return Fs::symlink($this->target(), "{$dir}/{$name}");
}
if (!@$fn($this->_path, "{$dir}/{$name}")) {
throw new Fs_Exception("Failed to {$fn} '{$this->_path}' to '{$dir}/{$name}'", error_get_last());
}
return Fs::get("{$dir}/{$name}");
}