1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2002
4 *
5 * 01/02/2003 Port to LTP [email protected]
6 * 06/30/2001 Port to Linux [email protected]
7 */
8
9 /*\
10 * [Description]
11 *
12 * The testcase for test setting of buffer by check boundary conditions.
13 */
14
15 #include <stdio.h>
16 #include <string.h>
17 #include <unistd.h>
18 #include <stdlib.h>
19 #include <errno.h>
20
21 #include "tst_test.h"
22
23 #define BSIZE 4096
24
25 char buf[BSIZE];
26
fill(void)27 static void fill(void)
28 {
29 register int i;
30
31 for (i = 0; i < BSIZE; i++)
32 buf[i] = 'a';
33 }
34
checkit(char * str)35 static int checkit(char *str)
36 {
37 register int i = 0;
38
39 while (!*str++)
40 i++;
41
42 return i;
43 }
44
setup(void)45 static void setup(void)
46 {
47 fill();
48 }
49
verify_memset(void)50 static void verify_memset(void)
51 {
52 register int i, j;
53 char *p = &buf[400];
54
55 for (i = 0; i < 200; i++) {
56 fill();
57 memset(p, 0, i);
58 if ((j = checkit(p)) != i) {
59 tst_res(TINFO, "Not enough zero bytes, wanted %d, got %d", i, j);
60 break;
61 }
62 if (!p[-1] || !p[i]) {
63 tst_res(TINFO, "Boundary error, clear of %d", i);
64 break;
65 }
66 }
67
68 if (i == 200)
69 tst_res(TPASS, "Test passed");
70 else
71 tst_res(TFAIL, "Test fails");
72 }
73
74 static struct tst_test test = {
75 .setup = setup,
76 .test_all = verify_memset,
77 };
78