keyring(7) - Linux manual page (original) (raw)

thread-keyring(7) Miscellaneous Information Manual thread-keyring(7)

NAME top

   thread-keyring - per-thread keyring

DESCRIPTION top

   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)](../man1/keyctl.1.html) utility, '**@t**' can be used instead of a numeric
   key ID in much the same way, but as [keyctl(1)](../man1/keyctl.1.html) is a program run
   after forking, this is of no utility.

   Thread keyrings are not inherited across [clone(2)](../man2/clone.2.html) and [fork(2)](../man2/fork.2.html) and
   are cleared by [execve(2)](../man2/execve.2.html).  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**.

SEE ALSO top

   [keyctl(1)](../man1/keyctl.1.html), [keyctl(3)](../man3/keyctl.3.html), [keyrings(7)](../man7/keyrings.7.html), [persistent-keyring(7)](../man7/persistent-keyring.7.html),
   [process-keyring(7)](../man7/process-keyring.7.html), [session-keyring(7)](../man7/session-keyring.7.html), [user-keyring(7)](../man7/user-keyring.7.html),
   [user-session-keyring(7)](../man7/user-session-keyring.7.html)

COLOPHON top

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Linux man-pages 6.10 2024-05-02 thread-keyring(7)

Pages that refer to this page:add_key(2), keyctl(2), KEYCTL_GET_KEYRING_ID(2const), KEYCTL_SET_REQKEY_KEYRING(2const), request_key(2), keyrings(7), keyutils(7), persistent-keyring(7), process-keyring(7), session-keyring(7), user-keyring(7), user-session-keyring(7)