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April, 26th. 2006:
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THREAD-KEYRING
Section: Linux Programmer's Manual (7) Updated: 2017-03-13 Index
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NAME
thread-keyring - per-thread keyring
DESCRIPTION
The thread keyring is a keyring used to anchor keys on behalf of a process.
It is created only when a thread requests it.
The thread keyring has the name (description)
_tid.
A special serial number value,
KEY_SPEC_THREAD_KEYRING,
is defined that can be used in lieu of the actual serial number of
the calling thread's thread keyring.
From the
keyctl(1)
utility, '@t' can be used instead of a numeric key ID in
much the same way, but as
keyctl(1)
is a program run after forking, this is of no utility.
Thread keyrings are not inherited across
clone(2)
and
fork(2)
and are cleared by
execve(2).
A thread keyring is destroyed when the thread that refers to it terminates.
Initially, a thread does not have a thread keyring.
If a thread doesn't have a thread keyring when it is accessed,
then it will be created if it is to be modified;
otherwise the operation will fail with the error
ENOKEY.
SEE ALSO
keyctl(1),
keyctl(3),
keyrings(7),
persistent-keyring(7),
process-keyring(7),
session-keyring(7),
user-keyring(7),
user-session-keyring(7)
COLOPHON
This page is part of release 4.13 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- DESCRIPTION
-
- SEE ALSO
-
- COLOPHON
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