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Diffstat (limited to 'upstream/opensuse-tumbleweed/man7/session-keyring.7')
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diff --git a/upstream/opensuse-tumbleweed/man7/session-keyring.7 b/upstream/opensuse-tumbleweed/man7/session-keyring.7 new file mode 100644 index 00000000..d8a950f1 --- /dev/null +++ b/upstream/opensuse-tumbleweed/man7/session-keyring.7 @@ -0,0 +1,113 @@ +.\" 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 2023-03-12 "Linux man-pages 6.05.01" +.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 . +.PP +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. +.PP +From the +.BR keyctl (1) +utility, '\fB@s\fP' can be used instead of a numeric key ID in +much the same way. +.PP +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. +.PP +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.) +.PP +These operations are also exposed through the +.BR keyctl (1) +utility as: +.PP +.in +4n +.EX +keyctl session +keyctl session \- [<prog> <arg1> <arg2> ...] +keyctl session <name> [<prog> <arg1> <arg2> ...] +.EE +.in +.PP +and: +.PP +.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) |