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.\"-
.\" Copyright (c) 2002 Networks Associates Technology, Inc.
.\" All rights reserved.
.\"
.\" This software was developed for the FreeBSD Project by ThinkSec AS and
.\" NAI Labs, the Security Research Division of Network Associates, Inc.
.\" under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
.\" DARPA CHATS research program.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. The name of the author may not be used to endorse or promote
.\" products derived from this software without specific prior written
.\" permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $P4: //depot/projects/openpam/doc/man/pam_start.3#9 $
.\"
.Dd March 7, 2002
.Dt PAM_START 3
.Os
.Sh NAME
.Nm pam_start
.Nd initiate a PAM transaction
.Sh LIBRARY
.Lb libpam
.Sh SYNOPSIS
.In security/pam_appl.h
.Ft int
.Fn pam_start "const char *service" "const char *user" "const struct pam_conv *pam_conv" "pam_handle_t **pamh"
.Sh DESCRIPTION
The
.Nm
function creates and initializes a PAM context.
.Pp
The
.Va service
argument specifies the name of the policy to apply, and is
stored in the
.Dv PAM_SERVICE
item in the created context.
.Pp
The
.Va user
argument specifies the name of the target user - the user the
created context will serve to authenticate.
It is stored in the
.Dv PAM_USER
item in the created context.
.Pp
The
.Va pam_conv
argument points to a
.Vt struct pam_conv
describing the
conversation function to use.
This structure is defined as follows:
.Pp
.Bd -literal
struct pam_conv {
int (*conv)(int, const struct pam_message **,
struct pam_response **, void *);
void *appdata_ptr;
};
.Sh RETURN VALUES
The
.Nm
function returns one of the following values:
.Bl -tag -width 18n
.It Bq Er PAM_BUF_ERR
Memory buffer error.
.It Bq Er PAM_SYSTEM_ERR
System error.
.El
.Sh SEE ALSO
.Xr pam 3 ,
.Xr pam_end 3 ,
.Xr pam_get_item 3 ,
.Xr pam_set_item 3 ,
.Xr pam_strerror 3
.Sh STANDARDS
.Rs
.%T "X/Open Single Sign-On Service (XSSO) - Pluggable Authentication Modules"
.%D "June 1997"
.Re
.Sh AUTHORS
The
.Nm
function and this manual page were developed for the FreeBSD Project
by ThinkSec AS and NAI Labs, the Security Research Division of Network
Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
.Pq Dq CBOSS ,
as part of the DARPA CHATS research program.
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