| /* |
| * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include "config.h" |
| #endif |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdint.h> |
| #include <unistd.h> |
| #include <sys/mman.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| |
| #ifdef __NR_sendfile |
| |
| int |
| main(int ac, const char **av) |
| { |
| assert(ac == 2); |
| |
| (void) close(0); |
| if (open("/dev/zero", O_RDONLY) != 0) |
| return 77; |
| |
| int sv[2]; |
| if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) |
| return 77; |
| |
| int reg_in = open(av[1], O_RDONLY); |
| if (reg_in < 0) |
| return 77; |
| |
| struct stat stb; |
| if (fstat(reg_in, &stb)) |
| return 77; |
| const size_t blen = stb.st_size / 3; |
| const size_t alen = stb.st_size - blen; |
| assert(S_ISREG(stb.st_mode) && blen > 0); |
| |
| const size_t page_len = sysconf(_SC_PAGESIZE); |
| if (!syscall(__NR_sendfile, 0, 1, NULL, page_len) || |
| EBADF != errno) |
| return 77; |
| printf("sendfile(0, 1, NULL, %lu) = -1 EBADF (Bad file descriptor)\n", |
| (unsigned long) page_len); |
| |
| void *p = mmap(NULL, page_len * 2, PROT_READ | PROT_WRITE, |
| MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| if (MAP_FAILED == p || munmap(p + page_len, page_len)) |
| return 77; |
| |
| if (!syscall(__NR_sendfile, 0, 1, p + page_len, page_len)) |
| return 77; |
| printf("sendfile(0, 1, %#lx, %lu) = -1 EFAULT (Bad address)\n", |
| (unsigned long) p + page_len, (unsigned long) page_len); |
| |
| if (syscall(__NR_sendfile, sv[1], reg_in, NULL, alen) != (long) alen) |
| return 77; |
| printf("sendfile(%d, %d, NULL, %lu) = %lu\n", |
| sv[1], reg_in, (unsigned long) alen, |
| (unsigned long) alen); |
| |
| uint32_t *p_off = p + page_len - sizeof(uint32_t); |
| if (syscall(__NR_sendfile, sv[1], reg_in, p_off, alen) != (long) alen) { |
| printf("sendfile(%d, %d, %#lx, %lu) = -1 EFAULT (Bad address)\n", |
| sv[1], reg_in, (unsigned long) p_off, |
| (unsigned long) alen); |
| --p_off; |
| if (syscall(__NR_sendfile, sv[1], reg_in, p_off, alen) |
| != (long) alen) |
| return 77; |
| } |
| printf("sendfile(%d, %d, [0] => [%lu], %lu) = %lu\n", |
| sv[1], reg_in, (unsigned long) alen, |
| (unsigned long) alen, (unsigned long) alen); |
| |
| if (syscall(__NR_sendfile, sv[1], reg_in, p_off, stb.st_size + 1) |
| != (long) blen) |
| return 77; |
| printf("sendfile(%d, %d, [%lu] => [%lu], %lu) = %lu\n", |
| sv[1], reg_in, (unsigned long) alen, |
| (unsigned long) stb.st_size, |
| (unsigned long) stb.st_size + 1, |
| (unsigned long) blen); |
| |
| if (p_off == p + page_len - sizeof(uint64_t)) { |
| uint64_t *p_off64 = (uint64_t *) p_off; |
| *p_off64 = 0xcafef00dfacefeed; |
| if (!syscall(__NR_sendfile, sv[1], reg_in, p_off64, 1)) |
| return 77; |
| printf("sendfile(%d, %d, [14627392582579060461], 1) = -1 EINVAL (Invalid argument)\n", |
| sv[1], reg_in); |
| *p_off64 = 0xdefaced; |
| } else { |
| *p_off = 0xdefaced; |
| } |
| if (syscall(__NR_sendfile, sv[1], reg_in, p_off, 1)) |
| return 77; |
| printf("sendfile(%d, %d, [233811181], 1) = 0\n", |
| sv[1], reg_in); |
| |
| puts("+++ exited with 0 +++"); |
| return 0; |
| } |
| |
| #else |
| |
| int |
| main(void) |
| { |
| return 77; |
| } |
| |
| #endif |