xattr_get
(PECL)
xattr_get --
Get an extended attribute
Descrizione
string
xattr_get ( string filename, string name [, int flags] )
This function gets the value of an extended attribute of a file.
Extended attributes have two different namespaces: user
and root namespace. User namespace is available for all users while root namespace
is available only for user with root privileges. xattr operates on user namespace
by default, but you can change that using flags argument.
Elenco dei parametri
- filename
The file from which we get the attribute.
- name
The name of the attribute.
- flags
Tabella 1. Supported xattr flags
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. |
Valori restituiti
Returns a string containing the value or FALSE if the attribute doesn't
exist.
Esempi
Esempio 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 ... */
?>
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