.\"-
.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc.
.\" All rights reserved.
.\"
.\" This software was developed for the FreeBSD Project by ThinkSec AS and
.\" Network Associates Laboratories, 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:
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" $P4$
.\"
.Dd June 16, 2005
.Dt PAM_GET_USER 3
.Os
.Sh NAME
.Nm pam_get_user
.Nd retrieve user name
.Sh LIBRARY
.Lb libpam
.Sh SYNOPSIS
.In sys/types.h
.In security/pam_appl.h
.Ft "int"
.Fn pam_get_user "pam_handle_t *pamh" "const char **user" "const char *prompt"
.Sh DESCRIPTION
The
.Nm
function returns the name of the target user, as
specified to
.Xr pam_start 3 .
If no user was specified, nor set using
.Xr pam_set_item 3 ,
.Nm
will prompt for a user name.
Either way, a pointer to the user name is stored in the location
pointed to by the
.Fa user
argument.
.Pp
The
.Fa prompt
argument specifies a prompt to use if no user name is
cached.
If it is
.Dv NULL ,
the
.Dv PAM_USER_PROMPT
will be used.
If that item is also
.Dv NULL ,
a hardcoded default prompt will be used.
.Pp
.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_CONV_ERR
Conversation failure.
.It Bq Er PAM_SYSTEM_ERR
System error.
.El
.Sh SEE ALSO
.Xr pam 3 ,
.Xr pam_get_authtok 3 ,
.Xr pam_get_item 3 ,
.Xr pam_set_item 3 ,
.Xr pam_start 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
.Fx
Project by ThinkSec AS and Network Associates Laboratories, 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.