12-07-2007
This thread will lead to nowhere.
dreambig, you might have had the intentions in mind when you started this thread. But like the members say, it is very close to breaking the homework rule. This thread shall be closed for now. If the other moderators feel otherwise, they can open this thread.
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LEARN ABOUT LINUX
thread-keyring
THREAD-KEYRING(7) Linux Programmer's Manual THREAD-KEYRING(7)
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 fails 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)
Linux 2017-03-13 THREAD-KEYRING(7)