155682Smarkm/*
2233294Sstas * Copyright (c) 1998 - 2001 Kungliga Tekniska H��gskolan
3233294Sstas * (Royal Institute of Technology, Stockholm, Sweden).
4233294Sstas * All rights reserved.
555682Smarkm *
6233294Sstas * Redistribution and use in source and binary forms, with or without
7233294Sstas * modification, are permitted provided that the following conditions
8233294Sstas * are met:
955682Smarkm *
10233294Sstas * 1. Redistributions of source code must retain the above copyright
11233294Sstas *    notice, this list of conditions and the following disclaimer.
1255682Smarkm *
13233294Sstas * 2. Redistributions in binary form must reproduce the above copyright
14233294Sstas *    notice, this list of conditions and the following disclaimer in the
15233294Sstas *    documentation and/or other materials provided with the distribution.
1655682Smarkm *
17233294Sstas * 3. Neither the name of the Institute nor the names of its contributors
18233294Sstas *    may be used to endorse or promote products derived from this software
19233294Sstas *    without specific prior written permission.
2055682Smarkm *
21233294Sstas * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22233294Sstas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23233294Sstas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24233294Sstas * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25233294Sstas * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26233294Sstas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27233294Sstas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28233294Sstas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29233294Sstas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30233294Sstas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31233294Sstas * SUCH DAMAGE.
3255682Smarkm */
3355682Smarkm
3455682Smarkm#include <config.h>
3555682Smarkm
3655682Smarkm#include "roken.h"
3755682Smarkm
38233294SstasROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
3955682Smarkmissuid(void)
4055682Smarkm{
4190926Snectar#if defined(HAVE_ISSETUGID)
4290926Snectar    return issetugid();
43178825Sdfr#else /* !HAVE_ISSETUGID */
44178825Sdfr
4555682Smarkm#if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
4655682Smarkm    if(getuid() != geteuid())
4755682Smarkm	return 1;
4855682Smarkm#endif
4955682Smarkm#if defined(HAVE_GETGID) && defined(HAVE_GETEGID)
5055682Smarkm    if(getgid() != getegid())
5155682Smarkm	return 2;
5255682Smarkm#endif
53178825Sdfr
5455682Smarkm    return 0;
55178825Sdfr#endif /* HAVE_ISSETUGID */
5655682Smarkm}
57