mirror of https://github.com/mkerrisk/man-pages
thread-keyring.7: New page adopted from keyutils
Since this page documents kernel-user-space interfaces, it makes sense to have it as part of man-pages, rather than the keyutils package. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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.\"
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.\" Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
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.\" Written by David Howells (dhowells@redhat.com)
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.\"
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.\" This program is free software; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public Licence
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.\" as published by the Free Software Foundation; either version
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.\" 2 of the Licence, or (at your option) any later version.
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.\"
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.TH "THREAD KEYRING" 7 "20 Feb 2014" Linux "Kernel key management"
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.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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.SH NAME
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thread_keyring \- Per-thread keyring
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.SH DESCRIPTION
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The
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.B thread keyring
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is a keyring used to anchor keys on behalf of a process. It is only created
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when a thread requests it.
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.P
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A special serial number value, \fBKEY_SPEC_THREAD_KEYRING\fP, is defined that
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can be used in lieu of the calling thread's thread keyring's actual serial
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number.
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.P
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From the keyctl utility, '\fB@t\fP' can be used instead of a numeric key ID in
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much the same way, but as keyctl is a program run after forking, this is of no
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utility.
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.P
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Thread keyrings are not inherited across clone() and are cleared by execve().
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A thread keyring is destroyed when the thread that refers to it exits.
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.P
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If a thread doesn't have a thread keyring when it is accessed, then the thread
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keyring will be created if the keyring is to be modified, otherwise error
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ENOKEY will be issued.
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.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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.SH SEE ALSO
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.BR keyctl (1),
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.br
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.BR keyctl (3),
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.br
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.BR keyrings (7),
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.br
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.BR process-keyring (7),
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.br
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.BR session-keyring (7),
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.br
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.BR user-keyring (7),
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.br
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.BR user-session-keyring (7)
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.br
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.BR persistent-keyring (7)
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