/* * Copyright (c) 2015 Dmitry V. Levin * 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 #include #include #include #include #include #include #include #include #include #ifdef __NR_sendfile64 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_sendfile64, 0, 1, NULL, page_len) || EBADF != errno) return 77; printf("sendfile64(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_sendfile64, 0, 1, p + page_len, page_len)) return 77; printf("sendfile64(0, 1, %#lx, %lu) = -1 EFAULT (Bad address)\n", (unsigned long) p + page_len, (unsigned long) page_len); if (syscall(__NR_sendfile64, sv[1], reg_in, NULL, alen) != (long) alen) return 77; printf("sendfile64(%d, %d, NULL, %lu) = %lu\n", sv[1], reg_in, (unsigned long) alen, (unsigned long) alen); uint64_t *p_off = p + page_len - sizeof(uint64_t); if (syscall(__NR_sendfile64, sv[1], reg_in, p_off, alen) != (long) alen) return 77; printf("sendfile64(%d, %d, [0] => [%lu], %lu) = %lu\n", sv[1], reg_in, (unsigned long) alen, (unsigned long) alen, (unsigned long) alen); if (syscall(__NR_sendfile64, sv[1], reg_in, p_off, stb.st_size + 1) != (long) blen) return 77; printf("sendfile64(%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); *p_off = 0xcafef00dfacefeed; if (!syscall(__NR_sendfile64, sv[1], reg_in, p_off, 1)) return 77; printf("sendfile64(%d, %d, [14627392582579060461], 1)" " = -1 EINVAL (Invalid argument)\n", sv[1], reg_in); *p_off = 0xfacefeed; if (syscall(__NR_sendfile64, sv[1], reg_in, p_off, 1)) return 77; printf("sendfile64(%d, %d, [4207869677], 1) = 0\n", sv[1], reg_in); puts("+++ exited with 0 +++"); return 0; } #else int main(void) { return 77; } #endif