NAME
keyctl_link - Link a key to a keyring keyctl_unlink - Unlink a key 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 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The key or the keyring specified have been revoked.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),
request-key(8)