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 email@example.com] If you have a bug report for this manual page, send it to firstname.lastname@example.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 2020-06-09. (At that time, the date of the most recent commit that was found in the repository was 2020-05-18.) 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 email@example.com Linux 28 Feb 2017 KEYCTL_RESTRICT_KEYRING(3)
Pages that refer to this page: keyctl(3)