'\" te
.\"  Copyright (c) 1998, Sun Microsystems, Inc.   All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH PAM_OPEN_SESSION 3PAM "Oct 13, 1998"
.SH NAME
pam_open_session, pam_close_session \- perform PAM session creation and
termination operations
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-lpam\fR [ \fIlibrary\fR ... ]
#include <security/pam_appl.h>



\fBint\fR \fBpam_open_session\fR(\fBpam_handle_t *\fR\fIpamh\fR, \fBint\fR \fIflags\fR);
.fi

.LP
.nf
\fBint\fR \fBpam_close_session\fR(\fBpam_handle_t *\fR\fIpamh\fR, \fBint\fR \fIflags\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBpam_open_session()\fR function is called after a user has been
successfully authenticated. See  \fBpam_authenticate\fR(3PAM) and
\fBpam_acct_mgmt\fR(3PAM). It is used to notify the session modules that a new
session  has been initiated.  All programs that use the  \fBpam\fR(3PAM)
library should invoke \fBpam_open_session()\fR when beginning a new session.
Upon termination of this activity, \fBpam_close_session()\fR should be invoked
to inform \fBpam\fR(3PAM) that the session has terminated.
.sp
.LP
The \fIpamh\fR argument is an authentication handle obtained by a prior call to
\fBpam_start()\fR. The following flag may be set in the \fIflags\fR field for
\fBpam_open_session()\fR and \fBpam_close_session()\fR:
.sp
.ne 2
.na
\fB\fBPAM_SILENT\fR\fR
.ad
.RS 14n
The session service should not generate any messages.
.RE

.SH RETURN VALUES
.sp
.LP
Upon successful completion,  \fBPAM_SUCCESS\fR is returned.  In addition to the
return values defined in \fBpam\fR(3PAM), the following value may be returned
on error:
.sp
.ne 2
.na
\fB\fBPAM_SESSION_ERR\fR\fR
.ad
.RS 19n
Cannot make or remove an entry for the specified session.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for description of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	 Stable
_
MT-Level	MT-Safe with exceptions
.TE

.SH SEE ALSO
.sp
.LP
\fBgetutxent\fR(3C), \fBpam\fR(3PAM), \fBpam_acct_mgmt\fR(3PAM),
\fBpam_authenticate\fR(3PAM), \fBpam_start\fR(3PAM), \fBattributes\fR(5)
.SH NOTES
.sp
.LP
In many instances, the \fBpam_open_session()\fR and \fBpam_close_session()\fR
calls may be made by different processes. For example, in UNIX the \fBlogin\fR
process opens a session, while the \fBinit\fR process closes the session.  In
this case, \fBUTMP/WTMP\fR entries may be used to link the call to
\fBpam_close_session()\fR with an earlier call to \fBpam_open_session()\fR.
This is possible because \fBUTMP/WTMP\fR entries are uniquely identified by a
combination of attributes, including the user login name and device name, which
are accessible through the  \fBPAM\fR handle, \fIpamh\fR. The call to
\fBpam_open_session()\fR should precede  \fBUTMP/WTMP\fR entry management, and
the call to \fBpam_close_session()\fR should follow  \fBUTMP/WTMP\fR exit
management.
.sp
.LP
The interfaces in  \fBlibpam\fR are MT-Safe only if each thread within the
multithreaded application uses its own  \fBPAM\fR handle.