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THREAD-KEYRING(7) Linux Programmer's Manual THREAD-KEYRING(7)
thread-keyring - per-thread keyring
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 fails
with the error ENOKEY.
keyctl(1), keyctl(3), keyrings(7), persistent-keyring(7),
process-keyring(7), session-keyring(7), user-keyring(7),
user-session-keyring(7)
This page is part of release 5.13 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/.
Linux 2020-08-13 THREAD-KEYRING(7)
Pages that refer to this page: add_key(2), keyctl(2), request_key(2), keyrings(7), keyutils(7), persistent-keyring(7), process-keyring(7), session-keyring(7), user-keyring(7), user-session-keyring(7)
Copyright and license for this manual page
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