.\"
.\" 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_SET_REQKEY_KEYRING 3 "4 May 2006" Linux "Linux Key Management Calls"
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.SH NAME
keyctl_set_reqkey_keyring \- set the implicit destination keyring
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.SH SYNOPSIS
.nf
.B #include <keyutils.h>
.sp
.BI "long keyctl_set_reqkey_keyring(int " reqkey_defl ");"
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.SH DESCRIPTION
.BR keyctl_set_reqkey_keyring ()
sets the default destination for implicit key requests for the current thread
and returns the old setting.
.P
After this operation has been issued, keys acquired by implicit key requests,
such as might be performed by
.BR open ()
on an AFS or NFS filesystem, will be
linked by default to the specified keyring by this function.
.P
The valid values of
.I reqkey_defl
are:
.TP
.B KEY_REQKEY_DEFL_NO_CHANGE
This makes no change to the current setting.
.TP
.B KEY_REQKEY_DEFL_THREAD_KEYRING
This makes the thread-specific keyring the default destination.
.TP
.B KEY_REQKEY_DEFL_PROCESS_KEYRING
This makes the process-specific keyring the default destination.
.TP
.B KEY_REQKEY_DEFL_SESSION_KEYRING
This makes the session keyring the default destination.
.TP
.B KEY_REQKEY_DEFL_USER_KEYRING
This makes the UID-specific keyring the default destination.
.TP
.B KEY_REQKEY_DEFL_USER_SESSION_KEYRING
This makes the UID-specific session keyring the default destination.
.TP
.B KEY_REQKEY_DEFL_DEFAULT
This selects the default behaviour which is to use the thread-specific keyring
if there is one, otherwise the process-specific keyring if there is one,
otherwise the session keyring if there is one, otherwise the UID-specific
session keyring.
.P
This setting is inherited across
.BR fork ()
and
.BR exec ().

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.SH RETURN VALUE
On success
.BR keyctl_set_reqkey_keyring ()
returns the serial number of the keyring which was the previous default for the
current thread.
On error, the value
.B -1
will be returned and
.I errno
will have been set to an appropriate error.
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.SH ERRORS
.TP
.B EINVAL
The value of
.I reqkey_defl
is invalid.
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.SH LINKING
This is a library function that can be found in
.IR libkeyutils .
When linking,
.B \-lkeyutils
should be specified to the linker.
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.SH SEE ALSO
.ad l
.nh
.BR keyctl (1),
.BR add_key (2),
.BR keyctl (2),
.BR request_key (2),
.BR keyctl (3),
.BR keyutils (7),
.BR keyrings (7),
.BR request\-key (8)