1 /* 2 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * Copyright (c) 2014-2017 The strace developers. 4 * 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "tests.h" 30 #include <assert.h> 31 #include <fcntl.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include <sys/socket.h> 36 37 int main(int ac, const char **av) 38 { 39 assert(ac > 0); 40 int fds[ac]; 41 42 static const char sample[] = 43 "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"; 44 const unsigned int data_size = sizeof(sample) - 1; 45 void *data = tail_alloc(data_size); 46 memcpy(data, sample, data_size); 47 48 TAIL_ALLOC_OBJECT_CONST_PTR(struct iovec, iov); 49 iov->iov_base = data; 50 iov->iov_len = data_size; 51 52 TAIL_ALLOC_OBJECT_CONST_PTR(struct msghdr, mh); 53 memset(mh, 0, sizeof(*mh)); 54 mh->msg_iov = iov; 55 mh->msg_iovlen = 1; 56 57 int i; 58 while ((i = open("/dev/null", O_RDWR)) <= ac + 2) 59 assert(i >= 0); 60 while (i > 2) 61 assert(close(i--) == 0); 62 assert(close(0) == 0); 63 64 int sv[2]; 65 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 66 perror_msg_and_skip("socketpair"); 67 int one = 1; 68 if (setsockopt(sv[0], SOL_SOCKET, SO_PASSCRED, &one, sizeof(one))) 69 perror_msg_and_skip("setsockopt"); 70 71 assert((fds[0] = open("/dev/null", O_RDWR)) == 4); 72 for (i = 1; i < ac; ++i) 73 assert((fds[i] = open(av[i], O_RDONLY)) == i + 4); 74 75 unsigned int cmsg_size = CMSG_SPACE(sizeof(fds)); 76 struct cmsghdr *cmsg = tail_alloc(cmsg_size); 77 memset(cmsg, 0, cmsg_size); 78 cmsg->cmsg_level = SOL_SOCKET; 79 cmsg->cmsg_type = SCM_RIGHTS; 80 cmsg->cmsg_len = CMSG_LEN(sizeof(fds)); 81 memcpy(CMSG_DATA(cmsg), fds, sizeof(fds)); 82 83 mh->msg_control = cmsg; 84 mh->msg_controllen = cmsg_size; 85 86 assert(sendmsg(sv[1], mh, 0) == (int) data_size); 87 88 assert(close(sv[1]) == 0); 89 assert(open("/dev/null", O_RDWR) == sv[1]); 90 91 for (i = 0; i < ac; ++i) { 92 assert(close(fds[i]) == 0); 93 fds[i] = 0; 94 } 95 96 cmsg_size += CMSG_SPACE(sizeof(struct ucred)); 97 cmsg = tail_alloc(cmsg_size); 98 memset(cmsg, 0, cmsg_size); 99 mh->msg_control = cmsg; 100 mh->msg_controllen = cmsg_size; 101 102 assert(recvmsg(0, mh, 0) == (int) data_size); 103 assert(close(0) == 0); 104 105 return 0; 106 } 107
