1.\"- 2.\" Copyright (c) 2001-2003 Networks Associates Technology, Inc. 3.\" Copyright (c) 2004-2007 Dag-Erling Smørgrav 4.\" All rights reserved. 5.\" 6.\" This software was developed for the FreeBSD Project by ThinkSec AS and 7.\" Network Associates Laboratories, the Security Research Division of 8.\" Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9.\" ("CBOSS"), as part of the DARPA CHATS research program. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. The name of the author may not be used to endorse or promote 20.\" products derived from this software without specific prior written 21.\" permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" $P4$ 36.\" 37.Dd December 21, 2007 38.Dt OPENPAM_BORROW_CRED 3 39.Os 40.Sh NAME 41.Nm openpam_borrow_cred 42.Nd temporarily borrow user credentials 43.Sh LIBRARY 44.Lb libpam 45.Sh SYNOPSIS 46.In sys/types.h 47.In security/pam_appl.h 48.In security/openpam.h 49.Ft "int" 50.Fn openpam_borrow_cred "pam_handle_t *pamh" "const struct passwd *pwd" 51.Sh DESCRIPTION 52The 53.Nm 54function saves the current credentials and 55switches to those of the user specified by its 56.Fa pwd 57argument. 58The affected credentials are the effective UID, the effective GID, and 59the group access list. 60The original credentials can be restored using 61.Xr openpam_restore_cred 3 . 62.Pp 63.Sh RETURN VALUES 64The 65.Nm 66function returns one of the following values: 67.Bl -tag -width 18n 68.It Bq Er PAM_BUF_ERR 69Memory buffer error. 70.It Bq Er PAM_PERM_DENIED 71Permission denied. 72.It Bq Er PAM_SYSTEM_ERR 73System error. 74.El 75.Sh SEE ALSO 76.Xr setegid 2 , 77.Xr seteuid 2 , 78.Xr setgroups 2 , 79.Xr openpam_restore_cred 3 , 80.Xr pam 3 , 81.Xr pam_strerror 3 82.Sh STANDARDS 83The 84.Nm 85function is an OpenPAM extension. 86.Sh AUTHORS 87The 88.Nm 89function and this manual page were developed for the 90.Fx 91Project by ThinkSec AS and Network Associates Laboratories, the 92Security Research Division of Network Associates, Inc.\& under 93DARPA/SPAWAR contract N66001-01-C-8035 94.Pq Dq CBOSS , 95as part of the DARPA CHATS research program. 96