1 /*
2 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@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
main(void)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