1/*
2 * Check decoding of non-NUL-terminated strings when len == -1.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2017 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "tests.h"
32
33#include <stdio.h>
34#include <string.h>
35#include <unistd.h>
36#include <sys/uio.h>
37
38int
39main(void)
40{
41	char *const buf = tail_alloc(DEFAULT_STRLEN + 1);
42	struct iovec io = {
43		.iov_base = buf,
44		.iov_len = -1
45	};
46	int rc;
47
48	buf[0] = 0;
49
50	tprintf("%s", "");
51
52	memset(buf + 1, 'X', DEFAULT_STRLEN);
53	buf[DEFAULT_STRLEN - 1] = 0;
54
55	rc = writev(-1, &io, 1);
56	tprintf("writev(-1, [{iov_base=\"\\0%*s\\0\"..., iov_len=%lu}], 1)"
57		" = %s\n", DEFAULT_STRLEN - 2, buf + 1, -1UL, sprintrc(rc));
58
59	buf[DEFAULT_STRLEN - 1] = 'X';
60	buf[DEFAULT_STRLEN] = 0;
61
62	rc = writev(-1, &io, 1);
63	tprintf("writev(-1, [{iov_base=\"\\0%*s\"..., iov_len=%lu}], 1)"
64		" = %s\n", DEFAULT_STRLEN - 1, buf + 1, -1UL, sprintrc(rc));
65
66	++io.iov_base;
67	rc = writev(-1, &io, 1);
68	tprintf("writev(-1, [{iov_base=%p, iov_len=%lu}], 1) = %s\n",
69		io.iov_base, -1UL, sprintrc(rc));
70
71	tprintf("+++ exited with 0 +++\n");
72	return 0;
73}
74