(PECL xattr:0.9-1.0)
xattr_get — Get an extended attribute
This function gets the value of an extended attribute of a file.
Rozšírené atribúty majú dve odlišné namespacey: user a root namespace. User namespace je dostupná pre všetkých užívateľov, zatiaľčo root namespace je dostupná iba pre užívateľa s rootovskými privilégiami. xattr ako default pracuje na user namespace, ale môžete to zmeniť pomocou argumentu flags .
The file from which we get the attribute.
The name of the attribute.
XATTR_DONTFOLLOW | Do not follow the symbolic link but operate on symbolic link itself. |
XATTR_ROOT | Set attribute in root (trusted) namespace. Requires root privileges. |
Returns a string containing the value or FALSE if the attribute doesn't exist.
Example#1 Checks if system administrator has signed the file
<?php
$file = '/usr/local/sbin/some_binary';
$signature = xattr_get($file, 'Root signature', XATTR_ROOT);
/* ... check if $signature is valid ... */
?>