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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | LINKING | SEE ALSO | COLOPHON |
KEYCTL_RESTRICT_KEYRING(3)inux Key Management CallsEYCTL_RESTRICT_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 2020-08-13. (At that time, the date of the most recent commit
that was found in the repository was 2020-07-07.) 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_RESTRICT_KEYRING(3)
Pages that refer to this page: keyctl(3)