.\"
.\" 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_REVOKE 3 "4 May 2006" Linux "Linux Key Management Calls"
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH NAME
keyctl_revoke \- Revoke a key
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH SYNOPSIS
.nf
.B #include <keyutils.h>
.sp
.BI "long keyctl_revoke(key_serial_t " key ");"
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH DESCRIPTION
.BR keyctl_revoke ()
marks a key as being revoked.
.P
After this operation has been performed on a key, attempts to access it will
meet with error
.BR EKEYREVOKED .
.P
The caller must have
.B write
permission on a key to be able revoke it.
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH RETURN VALUE
On success
.BR keyctl_revoke ()
returns
.BR 0 .
On error, the value
.B -1
will be returned and errno will have been set to an appropriate error.
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH ERRORS
.TP
.B ENOKEY
The specified key does not exist.
.TP
.B EKEYREVOKED
The key has already been revoked.
.TP
.B EACCES
The named key exists, but is not
.B writable
by the calling process.
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.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
.BR keyctl (1),
.br
.BR add_key (2),
.br
.BR keyctl (2),
.br
.BR request_key (2),
.br
.BR keyctl (3),
.br
.BR keyutils (7),
.br
.BR keyrings (7)