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