/*
* Copyright (c) 2022 Nicholas Marriott <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/types.h>
#include <sys/socket.h>

#include <stdio.h>
#include <unistd.h>

#ifdef HAVE_UCRED_H
#include <ucred.h>
#endif

#include "compat.h"

int
getpeereid(int s, uid_t *uid, gid_t *gid)
{
#ifdef HAVE_SO_PEERCRED
       struct ucred    uc;
       int             len = sizeof uc;

       if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &uc, &len) == -1)
               return (-1);
       *uid = uc.uid;
       *gid = uc.gid;
       return (0);
#elif defined(HAVE_GETPEERUCRED)
       ucred_t *ucred = NULL;

       if (getpeerucred(s, &ucred) == -1)
               return (-1);
       if ((*uid = ucred_geteuid(ucred)) == -1)
               return (-1);
       if ((*gid = ucred_getrgid(ucred)) == -1)
               return (-1);
       ucred_free(ucred);
       return (0);
#else
       *uid = geteuid();
       *gid = getegid();
       return (0);
#endif
}