From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/mach/hurd/seteuid.c | 67 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 sysdeps/mach/hurd/seteuid.c (limited to 'sysdeps/mach/hurd/seteuid.c') diff --git a/sysdeps/mach/hurd/seteuid.c b/sysdeps/mach/hurd/seteuid.c new file mode 100644 index 0000000000..9c44c4d275 --- /dev/null +++ b/sysdeps/mach/hurd/seteuid.c @@ -0,0 +1,67 @@ +/* Copyright (C) 1993, 1994 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include +#include +#include +#include + +/* Set the effective user ID of the calling process to UID. */ +int +DEFUN(seteuid, (uid), uid_t uid) +{ + auth_t newauth; + error_t err; + + HURD_CRITICAL_BEGIN; + __mutex_lock (&_hurd_id.lock); + err = _hurd_check_ids (); + + if (!err) + { + /* Make a new auth handle which has EUID as the first element in the + list of effective uids. */ + + size_t ngen = _hurd_id.gen.nuids < 1 ? 1 : _hurd_id.gen.nuids; + uid_t newgen[ngen]; + + newgen[0] = uid; + memcpy (&newgen[1], _hurd_id.gen.uids, (ngen - 1) * sizeof (uid_t)); + + err = __USEPORT (AUTH, __auth_makeauth + (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0, + newgen, ngen, + _hurd_id.aux.uids, _hurd_id.aux.nuids, + _hurd_id.gen.gids, _hurd_id.gen.ngids, + _hurd_id.aux.gids, _hurd_id.aux.ngids, + &newauth)); + } + __mutex_unlock (&_hurd_id.lock); + HURD_CRITICAL_END; + + if (err) + return __hurd_fail (err); + + /* Install the new handle and reauthenticate everything. */ + err = __setauth (newauth); + __mach_port_deallocate (__mach_task_self (), newauth); + return err; +} -- cgit v1.2.3