thread-keyring - Online Linux Manual PageSection : 7
Updated : 2022-10-30
Source : Linux man-pages 6.03

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NAMEthread-keyring − per-thread keyring

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DESCRIPTIONThe 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.

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SEE ALSOkeyctl(1), keyctl(3), keyrings(7), persistent−keyring(7), process−keyring(7), session−keyring(7), user−keyring(7), user−session−keyring(7) 0

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