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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | LINKING | SEE ALSO | COLOPHON |
KEYCTL_LINK(3) Linux Key Management Calls KEYCTL_LINK(3)
keyctl_link, keyctl_unlink - link/unlink a key to/from a keyring
#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);
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.
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.
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The key or the keyring specified have been revoked.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.
This is a library function that can be found in libkeyutils. When
linking, -lkeyutils should be specified to the linker.
keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl(3),
keyrings(7), keyutils(7)
This page is part of the keyutils (key management utilities) project.
Information about the project can be found at [unknown -- if you
know, please contact man-pages@man7.org] If you have a bug report for
this manual page, send it to keyrings@linux-nfs.org. This page was
obtained from the project's upstream Git repository
⟨http://git.kernel.org/pub/scm/linux/kernel/git/dhowells/keyutils.git⟩
on 2017-07-05. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-to-
date source for the page, or you have corrections or improvements to
the information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
Linux 4 May 2006 KEYCTL_LINK(3)
Pages that refer to this page: keyctl(2), keyctl(3), keyrings(7)