crypto/dist/ssh/getpeereid.c

   1 /*      $NetBSD: getpeereid.c,v 1.1 2002/10/01 14:07:30 itojun Exp $    */
   2
   3 /*
   4  * Copyright (c) 2002 Damien Miller.  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  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "includes.h"
  28 #include "getpeereid.h"
  29 #include <unistd.h>
  30
  31 __RCSID("$NetBSD$");
  32
  33 #if defined(SO_PEERCRED)
  34 int
  35 getpeereid(int s, uid_t *euid, gid_t *gid)
  36 {
  37         struct ucred cred;
  38         socklen_t len = sizeof(cred);
  39
  40         if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cred, &len) < 0)
  41                 return (-1);
  42         *euid = cred.uid;
  43         *gid = cred.gid;
  44
  45         return (0);
  46 }
  47 #else
  48 int
  49 getpeereid(int s, uid_t *euid, gid_t *gid)
  50 {
  51         *euid = geteuid();
  52         *gid = getgid();
  53
  54         return (0);
  55 }
  56 #endif /* defined(SO_PEERCRED) */