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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_SET_TIMEOUT 3 "4 May 2006" Linux "Linux Key Management Calls"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH NAME
+keyctl_set_timeout \- Set the expiration timer on a key
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH SYNOPSIS
+.nf
+.B #include <keyutils.h>
+.sp
+.BI "long keyctl_set_timeout(key_serial_t " key ", unsigned " timeout ");"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH DESCRIPTION
+.BR keyctl_set_timeout ()
+sets the expiration timer on a key to
+.I timeout
+seconds into the future.  Setting
+.I timeout
+to
+.B zero
+cancels the expiration, assuming the key hasn't already expired.
+.P
+When the key expires, further attempts to access it will be met with error
+.BR EKEYEXPIRED .
+.P
+The caller must have
+.B setattr
+permission on a key to be able change its permissions mask.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH RETURN VALUE
+On success
+.BR keyctl_set_timeout ()
+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 already expired.
+.TP
+.B EKEYREVOKED
+The specified key has been revoked.
+.TP
+.B EACCES
+The named 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 request-key (8)