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+.\" Title: pam_keyinit
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/>
+.\" Date: 03/02/2009
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_KEYINIT" "8" "03/02/2009" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * (re)Define some macros
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" toupper - uppercase a string (locale-aware)
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+\\$*
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+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.\}
+..
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+..
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "Name"
+pam_keyinit \- Kernel session keyring initialiser module
+.SH "Synopsis"
+.fam C
+.HP \w'\fBpam_keyinit\&.so\fR\ 'u
+\fBpam_keyinit\&.so\fR [debug] [force] [revoke]
+.fam
+.SH "DESCRIPTION"
+.PP
+The pam_keyinit PAM module ensures that the invoking process has a session keyring other than the user default session keyring\&.
+.PP
+The session component of the module checks to see if the process\'s session keyring is the user default, and, if it is, creates a new anonymous session keyring with which to replace it\&.
+.PP
+If a new session keyring is created, it will install a link to the user common keyring in the session keyring so that keys common to the user will be automatically accessible through it\&.
+.PP
+The session keyring of the invoking process will thenceforth be inherited by all its children unless they override it\&.
+.PP
+This module is intended primarily for use by login processes\&. Be aware that after the session keyring has been replaced, the old session keyring and the keys it contains will no longer be accessible\&.
+.PP
+This module should not, generally, be invoked by programs like
+\fBsu\fR, since it is usually desirable for the key set to percolate through to the alternate context\&. The keys have their own permissions system to manage this\&.
+.PP
+This module should be included as early as possible in a PAM configuration, so that other PAM modules can attach tokens to the keyring\&.
+.PP
+The keyutils package is used to manipulate keys more directly\&. This can be obtained from:
+.PP
+
+\m[blue]\fB Keyutils \fR\m[]\&\s-2\u[1]\d\s+2
+.SH "OPTIONS"
+.PP
+\fBdebug\fR
+.RS 4
+Log debug information with
+\fBsyslog\fR(3)\&.
+.RE
+.PP
+\fBforce\fR
+.RS 4
+Causes the session keyring of the invoking process to be replaced unconditionally\&.
+.RE
+.PP
+\fBrevoke\fR
+.RS 4
+Causes the session keyring of the invoking process to be revoked when the invoking process exits if the session keyring was created for this process in the first place\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+Only the
+\fBsession\fR
+module type is provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_SUCCESS
+.RS 4
+This module will usually return this value
+.RE
+.PP
+PAM_AUTH_ERR
+.RS 4
+Authentication failure\&.
+.RE
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_IGNORE
+.RS 4
+The return value should be ignored by PAM dispatch\&.
+.RE
+.PP
+PAM_SERVICE_ERR
+.RS 4
+Cannot determine the user name\&.
+.RE
+.PP
+PAM_SESSION_ERR
+.RS 4
+This module will return this value if its arguments are invalid or if a system error such as ENOMEM occurs\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known\&.
+.RE
+.SH "EXAMPLES"
+.PP
+Add this line to your login entries to start each login session with its own session keyring:
+.sp
+.if n \{\
+.RS 4
+.\}
+.fam C
+.ps -1
+.nf
+.if t \{\
+.sp -1
+.\}
+.BB lightgray adjust-for-leading-newline
+.sp -1
+
+session required pam_keyinit\&.so
+
+.EB lightgray adjust-for-leading-newline
+.if t \{\
+.sp 1
+.\}
+.fi
+.fam
+.ps +1
+.if n \{\
+.RE
+.\}
+.PP
+This will prevent keys from one session leaking into another session for the same user\&.
+.SH "SEE ALSO"
+.PP
+
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+\fBkeyctl\fR(1)
+.SH "AUTHOR"
+.PP
+pam_keyinit was written by David Howells, <dhowells@redhat\&.com>\&.
+.SH "Notes"
+.IP " 1." 4
+Keyutils
+.RS 4
+\%http://people.redhat.com/~dhowells/keyutils/
+.RE