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+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/share/man/man3/keyctl_update.3	Tue Mar 18 16:23:26 2025 -0400
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+.\"
+.\" Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+.\" Written by David Howells (dhowells@redhat.com)
+.\"
+.\" This program is free software; you can redistribute it and/or
+.\" modify it under the terms of the GNU General Public License
+.\" as published by the Free Software Foundation; either version
+.\" 2 of the License, or (at your option) any later version.
+.\"
+.TH KEYCTL_UPDATE 3 "4 May 2006" Linux "Linux Key Management Calls"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH NAME
+keyctl_update \- update a key
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH SYNOPSIS
+.nf
+.B #include <keyutils.h>
+.sp
+.BI "long keyctl_update(key_serial_t " key ", const void *" payload ,
+.BI "size_t " plen ");"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH DESCRIPTION
+.BR keyctl_update ()
+updates the payload of a key if the key type permits it.
+.P
+The caller must have
+.B write
+permission on a key to be able update it.
+.P
+.I payload
+and
+.I plen
+specify the data for the new payload.
+.I payload
+may be NULL and
+.I 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.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH RETURN VALUE
+On success
+.BR keyctl_update ()
+returns
+.BR 0 .
+On error, the value
+.B -1
+will be returned and
+.I errno
+will have been set to an appropriate error.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH ERRORS
+.TP
+.B ENOKEY
+The key specified is invalid.
+.TP
+.B EKEYEXPIRED
+The key specified has expired.
+.TP
+.B EKEYREVOKED
+The key specified had been revoked.
+.TP
+.B EINVAL
+The payload data was invalid.
+.TP
+.B ENOMEM
+Insufficient memory to store the new payload.
+.TP
+.B EDQUOT
+The key quota for this user would be exceeded by increasing the size of the
+key to accommodate the new payload.
+.TP
+.B EACCES
+The key exists, but is not
+.B writable
+by the calling process.
+.TP
+.B EOPNOTSUPP
+The key type does not support the update operation on its keys.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH LINKING
+This is a library function that can be found in
+.IR libkeyutils .
+When linking,
+.B \-lkeyutils
+should be specified to the linker.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH SEE ALSO
+.ad l
+.nh
+.BR keyctl (1),
+.BR add_key (2),
+.BR keyctl (2),
+.BR request_key (2),
+.BR keyctl (3),
+.BR keyrings (7),
+.BR keyutils (7)