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NAME | DESCRIPTION | SEE ALSO | COLOPHON |
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process-keyring(7) Miscellaneous Information Manual process-keyring(7)
process-keyring - per-process shared keyring
The process keyring is a keyring used to anchor keys on behalf of
a process. It is created only when a process requests it. The
process keyring has the name (description) _pid.
A special serial number value, KEY_SPEC_PROCESS_KEYRING, is
defined that can be used in lieu of the actual serial number of
the calling process's process keyring.
From the keyctl(1) utility, '@p' can be used instead of a numeric
key ID in much the same way, but since keyctl(1) is a program run
after forking, this is of no utility.
A thread created using the clone(2) CLONE_THREAD flag has the
same process keyring as the caller of clone(2). When a new
process is created using fork() it initially has no process
keyring. A process's process keyring is cleared on execve(2).
The process keyring is destroyed when the last thread that refers
to it terminates.
If a process doesn't have a process keyring when it is accessed,
then the process keyring will be created if the keyring is to be
modified; otherwise, the error ENOKEY results.
keyctl(1), keyctl(3), keyrings(7), persistent-keyring(7),
session-keyring(7), thread-keyring(7), user-keyring(7),
user-session-keyring(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-05-02 process-keyring(7)
Pages that refer to this page: add_key(2), keyctl(2), request_key(2), keyrings(7), keyutils(7), persistent-keyring(7), session-keyring(7), thread-keyring(7), user-keyring(7), user-session-keyring(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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