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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | LINKING | SEE ALSO | COLOPHON |
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KEYCTL_R...T_KEYRING(3) Linux Key Management CallsKEYCTL_R...T_KEYRING(3)
keyctl_restrict_keyring - restrict keys that may be linked to a
keyring
#include <keyutils.h>
long keyctl_restrict_keyring(key_serial_t keyring,
const char *type, const char *restriction);
keyctl_restrict_keyring() limits the linkage of keys to the given
keyring using a provided key type and restriction scheme. The
available options vary depending on the key type, and typically
contain a restriction name possibly followed by key ids or other
data relevant to the restriction. If the type and restriction are
both NULL, the keyring will reject all links.
On success keyctl_restrict_keyring() returns 0. On error, the
value -1 will be returned and errno will have been set to an
appropriate error.
EDEADLK
A restriction cycle was avoided. Two keyrings cannot
restrict each other.
EEXIST The keyring is already restricted.
EINVAL The restriction string is invalid or too large.
ENOKEY The key type in the restriction is invalid or not
available.
ENOTDIR
The provided key id references an item that is not a
keyring.
ENOENT The key type exists but does not support restrictions.
This is a library function that can be found in libkeyutils. When
linking, -lkeyutils should be specified to the linker.
keyctl(1), keyctl(2), keyctl(3), 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 2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2023-03-20.) 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 28 Feb 2017 KEYCTL_R...T_KEYRING(3)
Pages that refer to this page: KEYCTL_RESTRICT_KEYRING(2const), keyctl(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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