keyctl_set_reqkey_keyring() sets the default destination for implicit
key requests for the current thread and returns the old setting.
After this operation has been issued, keys acquired by implicit key
requests, such as might be performed by open() on an AFS or NFS
filesystem, will be linked by default to the specified keyring by
The valid values of reqkey_defl are:
This makes no change to the current setting.
This makes the thread-specific keyring the default
This makes the process-specific keyring the default
This makes the session keyring the default destination.
This makes the UID-specific keyring the default destination.
This makes the UID-specific session keyring the default
This selects the default behaviour which is to use the thread-
specific keyring if there is one, otherwise the process-
specific keyring if there is one, otherwise the session
keyring if there is one, otherwise the UID-specific session
This setting is inherited across fork() and exec().
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Linux 4 May 2006 KEYCTL_SET_REQKEY_KEYRING(3)