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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | LINKING | SEE ALSO | COLOPHON |
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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The key specified had been revoked.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 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 2024-06-14. (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 4 May 2006 KEYCTL_UPDATE(3)
Pages that refer to this page: keyctl(2), keyctl(3)
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HTML rendering created 2024-06-26 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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