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/*
* Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2014-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <assert.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
int main(int ac, const char **av)
{
assert(ac > 0);
int fds[ac];
static const char sample[] =
"\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff";
const unsigned int data_size = sizeof(sample) - 1;
void *data = tail_alloc(data_size);
memcpy(data, sample, data_size);
TAIL_ALLOC_OBJECT_CONST_PTR(struct iovec, iov);
iov->iov_base = data;
iov->iov_len = data_size;
TAIL_ALLOC_OBJECT_CONST_PTR(struct msghdr, mh);
memset(mh, 0, sizeof(*mh));
mh->msg_iov = iov;
mh->msg_iovlen = 1;
int i;
while ((i = open("/dev/null", O_RDWR)) <= ac + 2)
assert(i >= 0);
while (i > 2)
assert(close(i--) == 0);
assert(close(0) == 0);
int sv[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
perror_msg_and_skip("socketpair");
int one = 1;
if (setsockopt(sv[0], SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)))
perror_msg_and_skip("setsockopt");
assert((fds[0] = open("/dev/null", O_RDWR)) == 4);
for (i = 1; i < ac; ++i)
assert((fds[i] = open(av[i], O_RDONLY)) == i + 4);
unsigned int cmsg_size = CMSG_SPACE(sizeof(fds));
struct cmsghdr *cmsg = tail_alloc(cmsg_size);
memset(cmsg, 0, cmsg_size);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(fds));
memcpy(CMSG_DATA(cmsg), fds, sizeof(fds));
mh->msg_control = cmsg;
mh->msg_controllen = cmsg_size;
assert(sendmsg(sv[1], mh, 0) == (int) data_size);
assert(close(sv[1]) == 0);
assert(open("/dev/null", O_RDWR) == sv[1]);
for (i = 0; i < ac; ++i) {
assert(close(fds[i]) == 0);
fds[i] = 0;
}
cmsg_size += CMSG_SPACE(sizeof(struct ucred));
cmsg = tail_alloc(cmsg_size);
memset(cmsg, 0, cmsg_size);
mh->msg_control = cmsg;
mh->msg_controllen = cmsg_size;
assert(recvmsg(0, mh, 0) == (int) data_size);
assert(close(0) == 0);
return 0;
}
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