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-.\" Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
-.\" Written by David Howells (dhowells@redhat.com)
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.TH session-keyring 7 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-session-keyring \- session shared process keyring
-.SH DESCRIPTION
-The session keyring is a keyring used to anchor keys on behalf of a process.
-It is typically created by
-.BR pam_keyinit (8)
-when a user logs in and a link will be added that refers to the
-.BR user\-keyring (7).
-Optionally,
-.BR PAM (7)
-may revoke the session keyring on logout.
-(In typical configurations, PAM does do this revocation.)
-The session keyring has the name (description)
-.IR _ses .
-.P
-A special serial number value,
-.BR KEY_SPEC_SESSION_KEYRING ,
-is defined that can be used in lieu of the actual serial number of
-the calling process's session keyring.
-.P
-From the
-.BR keyctl (1)
-utility, '\fB@s\fP' can be used instead of a numeric key ID in
-much the same way.
-.P
-A process's session keyring is inherited across
-.BR clone (2),
-.BR fork (2),
-and
-.BR vfork (2).
-The session keyring
-is preserved across
-.BR execve (2),
-even when the executable is set-user-ID or set-group-ID or has capabilities.
-The session keyring is destroyed when the last process that
-refers to it exits.
-.P
-If a process doesn't have a session keyring when it is accessed, then,
-under certain circumstances, the
-.BR user\-session\-keyring (7)
-will be attached as the session keyring
-and under others a new session keyring will be created.
-(See
-.BR user\-session\-keyring (7)
-for further details.)
-.SS Special operations
-The
-.I keyutils
-library provides the following special operations for manipulating
-session keyrings:
-.TP
-.BR keyctl_join_session_keyring (3)
-This operation allows the caller to change the session keyring
-that it subscribes to.
-The caller can join an existing keyring with a specified name (description),
-create a new keyring with a given name,
-or ask the kernel to create a new "anonymous"
-session keyring with the name "_ses".
-(This function is an interface to the
-.BR keyctl (2)
-.B KEYCTL_JOIN_SESSION_KEYRING
-operation.)
-.TP
-.BR keyctl_session_to_parent (3)
-This operation allows the caller to make the parent process's
-session keyring to the same as its own.
-For this to succeed, the parent process must have
-identical security attributes and must be single threaded.
-(This function is an interface to the
-.BR keyctl (2)
-.B KEYCTL_SESSION_TO_PARENT
-operation.)
-.P
-These operations are also exposed through the
-.BR keyctl (1)
-utility as:
-.P
-.in +4n
-.EX
-keyctl session
-keyctl session \- [<prog> <arg1> <arg2> ...]
-keyctl session <name> [<prog> <arg1> <arg2> ...]
-.EE
-.in
-.P
-and:
-.P
-.in +4n
-.EX
-keyctl new_session
-.EE
-.in
-.SH SEE ALSO
-.ad l
-.nh
-.BR keyctl (1),
-.BR keyctl (3),
-.BR keyctl_join_session_keyring (3),
-.BR keyctl_session_to_parent (3),
-.BR keyrings (7),
-.BR PAM (7),
-.BR persistent\-keyring (7),
-.BR process\-keyring (7),
-.BR thread\-keyring (7),
-.BR user\-keyring (7),
-.BR user\-session\-keyring (7),
-.BR pam_keyinit (8)