1 /* 2 * Check silent decoding of sendmmsg and recvmmsg syscalls. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <stdio.h> 32 33 #include "msghdr.h" 34 35 int 36 main(void) 37 { 38 int fds[2]; 39 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds)) 40 perror_msg_and_skip("socketpair"); 41 42 char buf = 'A'; 43 struct iovec iov = { .iov_base = &buf, .iov_len = sizeof(buf) }; 44 struct mmsghdr mh = { 45 .msg_hdr = { 46 .msg_iov = &iov, 47 .msg_iovlen = 1 48 } 49 }; 50 51 int rc = send_mmsg(fds[1], &mh, 1, MSG_DONTWAIT); 52 if (rc < 0) 53 perror_msg_and_skip("sendmmsg"); 54 printf("sendmmsg(%d, %p, 1, MSG_DONTWAIT) = %d\n", fds[1], &mh, rc); 55 56 struct timespec t = { .tv_sec = 0, .tv_nsec = 12345678 }; 57 rc = recv_mmsg(fds[0], &mh, 1, MSG_DONTWAIT, &t); 58 printf("recvmmsg(%d, %p, 1, MSG_DONTWAIT, %p) = %d\n", 59 fds[0], &mh, &t, rc); 60 61 puts("+++ exited with 0 +++"); 62 return 0; 63 } 64
