.\"
.\" 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_CHOWN 3 "4 May 2006" Linux "Linux Key Management Calls"
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH NAME
keyctl_chown \- Change the ownership of a key
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH SYNOPSIS
.nf
.B #include <keyutils.h>
.sp
.BI "long keyctl_chown(key_serial_t " key ", uid_t " uid ", gid_t " gid ");"
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.SH DESCRIPTION
.BR keyctl_chown ()
changes the user and group ownership details of a key.
.P
A setting of
.B -1
on either
.I uid
or
.I gid
will cause that setting to be ignored.
.P
A process that does not have the
.B SysAdmin
capability may not change a key's UID or set the key's GID to a value that
does not match the process's GID or one of its group list.
.P
The caller must have
.B setattr
permission on a key to be able change its ownership.
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.SH RETURN VALUE
On success
.BR keyctl_chown ()
returns
.B 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 EKEYEXPIRED
The specified key has expired.
.TP
.B EKEYREVOKED
The specified key has been revoked.
.TP
.B EDQUOT
Changing the UID to the one specified would run that UID out of quota.
.TP
.B EACCES
The key exists, but does not grant
.B setattr
permission to 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)