применить функцию ко всем клавишам в дереве связки ключей (apply a function to all keys in a keyring tree)
Имя (Name)
recursive_key_scan, recursive_session_key_scan - apply a function
to all keys in a keyring tree
Синопсис (Synopsis)
#include <keyutils.h>
typedef int (*recursive_key_scanner_t)(key_serial_t parent,
key_serial_t key, char *desc, int desc_len, void *data);
long recursive_key_scan(key_serial_t keyring,
recursive_key_scanner_t func, void *data);
long recursive_session_key_scan(recursive_key_scanner_t func,
void *data);
Описание (Description)
recursive_key_scan() performs a depth-first recursive scan of the
specified keyring tree and applies func to every link found in
the accessible keyrings in that tree. data is passed to each
invocation of func.
The return values of func are summed and returned as the overall
return value. Errors are ignored. Inaccessible keyrings are not
scanned, but links to them are still passed to func.
recursive_session_key_scan() works exactly like
recursive_key_scan() with the caller's session keyring specified
as the starting keyring.
The callback function is called for each link found in all the
keyrings in the nominated tree and so may be called multiple
times for a particular key if that key has multiple links to it.
The callback function is passed the following parameters:
parent The keyring containing the link or 0 for the initial key.
key The key to which the link points.
desc and desc_len
A pointer to the raw description and its length as
retrieved with keyctl_describe_alloc(). These will be
NULL and -1 respectively if the description couldn't be
retrieved and errno will retain the error from
keyctl_describe_alloc().
data The data passed to the scanner function.
Возвращаемое значение (Return value)
These functions return the sum of the results of the callback
functions they invoke.
Ошибки (Error)
Ignored.
Ссылки (Linking)
When linking, -lkeyutils should be specified to the linker.
Смотри также (See also)
keyctl(3), keyctl_describe_alloc(3), keyrings(7)
