keyctl_session_to_parent() changes the session keyring to which the
calling process's parent subscribes to be the that of the calling
The keyring must have link permission available to the calling
process, the parent process must have the same UIDs/GIDs as the
calling process, and the LSM must not reject the replacement.
Furthermore, this may not be used to affect init or a kernel thread.
Note that the replacement will not take immediate effect upon the
parent process, but will rather be deferred to the next time it
returns to userspace from kernel space.
This page is part of the keyutils (key management utilities) project.
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Linux 20 Feb 2014 KEYCTL_SESSION_TO_PARENT(3)