NAME
keyctl_link, keyctl_unlink - link/unlink a key to/from a keyring
SYNOPSIS
#include <keyutils.h>
long keyctl_link(key_serial_t key, key_serial_t keyring);
long keyctl_unlink(key_serial_t key, key_serial_t keyring);
DESCRIPTION
keyctl_link() creates a link from keyring to key, displacing any link to another key of the same type and description in that keyring if one exists.
keyctl_unlink() removes the link from keyring to key if it exists.
The caller must have write permission on a keyring to be able to create or remove links in it.
The caller must have link permission on a key to be able to create a link to it.
RETURN VALUE
On success keyctl_link() and keyctl_unlink() return 0. On error, the value -1 will be returned and errno will have been set to an appropriate error.
ERRORS
|
ENOKEY |
The key or the keyring specified are invalid. |
EKEYEXPIRED
The key or the keyring specified have expired.
EKEYREVOKED
The key or the keyring specified have been revoked.
|
EACCES |
The keyring exists, but is not writable by the calling process. |
For keyctl_link() only:
|
ENOMEM |
Insufficient memory to expand the keyring | ||
|
EDQUOT |
Expanding the keyring would exceed the keyring owner’s quota. | ||
|
EACCES |
The key exists, but is not linkable by the calling process. |
LINKING
This is a library function that can be found in libkeyutils. When linking, -lkeyutils should be specified to the linker.
SEE ALSO
keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl(3), keyrings(7), keyutils(7)