1 /* 2 * Copyright (c) 2014-2015 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 #ifdef HAVE_CONFIG_H 29 # include "config.h" 30 #endif 31 #include <fcntl.h> 32 #include <unistd.h> 33 #include <sys/uio.h> 34 #include <assert.h> 35 36 int 37 main(void) 38 { 39 #if defined(HAVE_PREADV) && defined(HAVE_PWRITEV) 40 const off_t offset = 0xdefaceddeadbeefLL; 41 char buf[4]; 42 struct iovec iov = { buf, sizeof buf }; 43 44 (void) close(0); 45 assert(open("/dev/zero", O_RDONLY) == 0); 46 assert(pread(0, buf, sizeof buf, offset) == 4); 47 assert(preadv(0, &iov, 1, offset) == 4); 48 assert(!close(0)); 49 50 assert(open("/dev/null", O_WRONLY) == 0); 51 assert(pwrite(0, buf, sizeof buf, offset) == 4); 52 assert(pwritev(0, &iov, 1, offset) == 4); 53 assert(!close(0)); 54 55 return 0; 56 #else 57 return 77; 58 #endif 59 } 60
