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+.\"
+.\" Copyright (C) 2013 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_INVALIDATE 3 "29 Aug 2013" Linux "Linux Key Management Calls"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH NAME
+keyctl_invalidate \- Invalidate a key
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH SYNOPSIS
+.nf
+.B #include <keyutils.h>
+.sp
+.BI "long keyctl_invalidate(key_serial_t " key ");"
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH DESCRIPTION
+.BR keyctl_invalidate ()
+invalidates a
+.IR key .
+The key is scheduled for immediate removal from all the keyrings that point to
+it, after which it will be deleted.  The key will be ignored by all searches
+once this function is called even if it is not yet fully dealt with.
+.P
+The caller must have
+.B search
+permission on a key to be able to invalidate it.
+.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.SH RETURN VALUE
+On success
+.BR keyctl_invalidate ()
+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 key specified is invalid.
+.TP
+.B EKEYEXPIRED
+The key specified has expired.
+.TP
+.B EKEYREVOKED
+The key specified had been revoked.
+.TP
+.B EACCES
+The key exists, but is not
+.B searchable
+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 request-key (8)