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/*
* Copyright (c) 2013 Nikos Mavrogiannopoulos
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* Author: Nikos Mavrogiannopoulos <nmav@redhat.com>
*/
#include "config.h"
/* needed for struct ucred */
#if defined(__linux__) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#include "unix-peer.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/uio.h>
#include <sys/errno.h>
/* Returns the unix domain socket peer information.
* Returns zero on success.
*/
int
p11_get_upeer_id (int cfd, uid_t *uid, uid_t *gid, pid_t *pid)
{
int ret;
#if defined(SO_PEERCRED)
struct ucred cr;
socklen_t cr_len;
cr_len = sizeof (cr);
ret = getsockopt (cfd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len);
if (ret == -1)
return -1;
if (uid)
*uid = cr.uid;
if (gid)
*gid = cr.gid;
if (pid)
*pid = cr.pid;
#elif defined(HAVE_GETPEEREID)
/* *BSD/MacOSX */
uid_t euid;
gid_t egid;
ret = getpeereid (cfd, &euid, &egid);
if (ret == -1)
return -1;
if (uid)
*uid = euid;
if (gid)
*gid = egid;
if (pid)
*pid = -1;
#else
#error "Unsupported UNIX variant"
#endif
return 0;
}
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