KEYCTL_UPDATE(3) Linux Key Management Calls KEYCTL_UPDATE(3)
keyctl_update - update a key
#include <keyutils.h> long keyctl_update(key_serial_t key, const void *payload, size_t plen);
keyctl_update() updates the payload of a key if the key type permits it. The caller must have write permission on a key to be able to update it. payload and plen specify the data for the new payload. payload may be NULL and plen may be zero if the key type permits that. The key type may reject the data if it's in the wrong format or in some other way invalid.
On success keyctl_update() returns 0. On error, the value -1 will be returned and errno will have been set to an appropriate error.
ENOKEY The key specified is invalid. EKEYEXPIRED The key specified has expired. EKEYREVOKED The key specified had been revoked. EINVAL The payload data was invalid. ENOMEM Insufficient memory to store the new payload. EDQUOT The key quota for this user would be exceeded by increasing the size of the key to accommodate the new payload. EACCES The key exists, but is not writable by the calling process. EOPNOTSUPP The key type does not support the update operation on its keys.
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 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 2023-06-23. (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 email@example.com Linux 4 May 2006 KEYCTL_UPDATE(3)
Pages that refer to this page: keyctl(2), keyctl(3)