1 /* 2 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "tests.h" 29 #include <assert.h> 30 #include <fcntl.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <sys/socket.h> 35 36 int main(int ac, const char **av) 37 { 38 assert(ac > 0); 39 int fds[ac]; 40 41 static const char sample[] = 42 "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"; 43 const unsigned int data_size = sizeof(sample) - 1; 44 void *data = tail_alloc(data_size); 45 memcpy(data, sample, data_size); 46 47 struct iovec *iov = tail_alloc(sizeof(struct iovec)); 48 iov->iov_base = data; 49 iov->iov_len = data_size; 50 51 struct msghdr *mh = tail_alloc(sizeof(struct msghdr)); 52 memset(mh, 0, sizeof(*mh)); 53 mh->msg_iov = iov; 54 mh->msg_iovlen = 1; 55 56 int i; 57 while ((i = open("/dev/null", O_RDWR)) <= ac + 2) 58 assert(i >= 0); 59 while (i > 2) 60 assert(close(i--) == 0); 61 assert(close(0) == 0); 62 63 int sv[2]; 64 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 65 perror_msg_and_skip("socketpair"); 66 int one = 1; 67 if (setsockopt(sv[0], SOL_SOCKET, SO_PASSCRED, &one, sizeof(one))) 68 perror_msg_and_skip("setsockopt"); 69 70 assert((fds[0] = open("/dev/null", O_RDWR)) == 4); 71 for (i = 1; i < ac; ++i) 72 assert((fds[i] = open(av[i], O_RDONLY)) == i + 4); 73 74 unsigned int cmsg_size = CMSG_SPACE(sizeof(fds)); 75 struct cmsghdr *cmsg = tail_alloc(cmsg_size); 76 memset(cmsg, 0, cmsg_size); 77 cmsg->cmsg_level = SOL_SOCKET; 78 cmsg->cmsg_type = SCM_RIGHTS; 79 cmsg->cmsg_len = CMSG_LEN(sizeof(fds)); 80 memcpy(CMSG_DATA(cmsg), fds, sizeof(fds)); 81 82 mh->msg_control = cmsg; 83 mh->msg_controllen = cmsg_size; 84 85 assert(sendmsg(sv[1], mh, 0) == (int) data_size); 86 87 assert(close(sv[1]) == 0); 88 assert(open("/dev/null", O_RDWR) == sv[1]); 89 90 for (i = 0; i < ac; ++i) { 91 assert(close(fds[i]) == 0); 92 fds[i] = 0; 93 } 94 95 cmsg_size += CMSG_SPACE(sizeof(struct ucred)); 96 cmsg = tail_alloc(cmsg_size); 97 memset(cmsg, 0, cmsg_size); 98 mh->msg_control = cmsg; 99 mh->msg_controllen = cmsg_size; 100 101 assert(recvmsg(0, mh, 0) == (int) data_size); 102 assert(close(0) == 0); 103 104 return 0; 105 } 106
