1 /* 2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * Copyright (c) 2015-2017 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 <asm/unistd.h> 31 32 #ifdef __NR_sendfile 33 34 # include <assert.h> 35 # include <errno.h> 36 # include <fcntl.h> 37 # include <stdio.h> 38 # include <stdint.h> 39 # include <stdlib.h> 40 # include <unistd.h> 41 # include <sys/socket.h> 42 43 int 44 main(void) 45 { 46 (void) close(0); 47 if (open("/dev/zero", O_RDONLY) != 0) 48 perror_msg_and_skip("open: %s", "/dev/zero"); 49 50 int sv[2]; 51 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 52 perror_msg_and_skip("socketpair"); 53 54 const unsigned int page_size = get_page_size(); 55 assert(syscall(__NR_sendfile, 0, 1, NULL, page_size) == -1); 56 if (EBADF != errno) 57 perror_msg_and_skip("sendfile"); 58 printf("sendfile(0, 1, NULL, %u) = -1 EBADF (%m)\n", page_size); 59 60 unsigned int file_size = 0; 61 socklen_t optlen = sizeof(file_size); 62 if (getsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &file_size, &optlen)) 63 perror_msg_and_fail("getsockopt"); 64 if (file_size < 1024) 65 error_msg_and_skip("SO_SNDBUF too small: %u", file_size); 66 67 file_size /= 4; 68 if (file_size / 16 > page_size) 69 file_size = page_size * 16; 70 const unsigned int blen = file_size / 3; 71 const unsigned int alen = file_size - blen; 72 73 static const char fname[] = "sendfile-tmpfile"; 74 int reg_in = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0600); 75 if (reg_in < 0) 76 perror_msg_and_fail("open: %s", fname); 77 if (unlink(fname)) 78 perror_msg_and_fail("unlink: %s", fname); 79 if (ftruncate(reg_in, file_size)) 80 perror_msg_and_fail("ftruncate: %s", fname); 81 82 TAIL_ALLOC_OBJECT_VAR_PTR(uint32_t, p_off); 83 void *p = p_off + 1; 84 *p_off = 0; 85 86 assert(syscall(__NR_sendfile, 0, 1, p, page_size) == -1); 87 printf("sendfile(0, 1, %p, %u) = -1 EFAULT (%m)\n", p, page_size); 88 89 assert(syscall(__NR_sendfile, sv[1], reg_in, NULL, alen) 90 == (long) alen); 91 printf("sendfile(%d, %d, NULL, %u) = %u\n", 92 sv[1], reg_in, alen, alen); 93 94 p = p_off; 95 if (syscall(__NR_sendfile, sv[1], reg_in, p_off, alen) != (long) alen) { 96 printf("sendfile(%d, %d, %#lx, %u) = -1 EFAULT (%m)\n", 97 sv[1], reg_in, (unsigned long) p_off, alen); 98 --p_off; 99 *p_off = 0; 100 assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, alen) 101 == (long) alen); 102 } 103 printf("sendfile(%d, %d, [0] => [%u], %u) = %u\n", 104 sv[1], reg_in, alen, alen, alen); 105 106 assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, file_size + 1) 107 == (long) blen); 108 printf("sendfile(%d, %d, [%u] => [%u], %u) = %u\n", 109 sv[1], reg_in, alen, file_size, file_size + 1, blen); 110 111 if (p_off != p) { 112 uint64_t *p_off64 = (uint64_t *) p_off; 113 *p_off64 = 0xcafef00dfacefeedULL; 114 assert(syscall(__NR_sendfile, sv[1], reg_in, p_off64, 1) == -1); 115 printf("sendfile(%d, %d, [14627392582579060461], 1)" 116 " = -1 EINVAL (%m)\n", sv[1], reg_in); 117 *p_off64 = 0xdefaced; 118 } else { 119 *p_off = 0xdefaced; 120 } 121 assert(syscall(__NR_sendfile, sv[1], reg_in, p_off, 1) == 0); 122 printf("sendfile(%d, %d, [233811181], 1) = 0\n", 123 sv[1], reg_in); 124 125 puts("+++ exited with 0 +++"); 126 return 0; 127 } 128 129 #else 130 131 SKIP_MAIN_UNDEFINED("__NR_sendfile") 132 133 #endif 134
