1                 : /*
       2                 :  * Copyright (c) 1998 - 2001 Kungliga Tekniska Högskolan
       3                 :  * (Royal Institute of Technology, Stockholm, Sweden).
       4                 :  * All rights reserved.
       5                 :  *
       6                 :  * Redistribution and use in source and binary forms, with or without
       7                 :  * modification, are permitted provided that the following conditions
       8                 :  * are met:
       9                 :  *
      10                 :  * 1. Redistributions of source code must retain the above copyright
      11                 :  *    notice, this list of conditions and the following disclaimer.
      12                 :  *
      13                 :  * 2. Redistributions in binary form must reproduce the above copyright
      14                 :  *    notice, this list of conditions and the following disclaimer in the
      15                 :  *    documentation and/or other materials provided with the distribution.
      16                 :  *
      17                 :  * 3. Neither the name of the Institute nor the names of its contributors
      18                 :  *    may be used to endorse or promote products derived from this software
      19                 :  *    without specific prior written permission.
      20                 :  *
      21                 :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22                 :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23                 :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24                 :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25                 :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26                 :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27                 :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28                 :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29                 :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30                 :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31                 :  * SUCH DAMAGE.
      32                 :  */
      33                 : 
      34                 : #include <config.h>
      35                 : 
      36                 : #include "roken.h"
      37                 : 
      38                 : ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
      39                 : issuid(void)
      40               0 : {
      41                 : #if defined(HAVE_ISSETUGID)
      42                 :     return issetugid();
      43                 : #else /* !HAVE_ISSETUGID */
      44                 : 
      45                 : #if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
      46                 :     if(getuid() != geteuid())
      47                 :         return 1;
      48                 : #endif
      49                 : #if defined(HAVE_GETGID) && defined(HAVE_GETEGID)
      50                 :     if(getgid() != getegid())
      51                 :         return 2;
      52                 : #endif
      53                 : 
      54               0 :     return 0;
      55                 : #endif /* HAVE_ISSETUGID */
      56                 : }