1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* File : readwrite.c
* This file is part of RT-TestCase in RT-Thread RTOS
* COPYRIGHT (C) 2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-02-10 Bernard first version
*/
#include <rtthread.h>
#include <dfs_posix.h>
#define TEST_FN "/test.dat"
static char test_data[120], buffer[120];
/* �ļ���д���� */
void readwrite(const char* filename)
{
int fd;
int index, length;
/* ֻд & ���� �� */
fd = open(TEST_FN, O_WRONLY | O_CREAT | O_TRUNC, 0);
if (fd < 0)
{
rt_kprintf("open file for write failed\n");
return;
}
/* ������� */
for (index = 0; index < sizeof(test_data); index ++)
{
test_data[index] = index + 27;
}
/* ����� */
length = write(fd, test_data, sizeof(test_data));
if (length != sizeof(test_data))
{
rt_kprintf("write data failed\n");
close(fd);
return;
}
/* �ر��ļ� */
close(fd);
/* ֻд����ĩβ���Ӵ� */
fd = open(TEST_FN, O_WRONLY | O_CREAT | O_APPEND, 0);
if (fd < 0)
{
rt_kprintf("open file for append write failed\n");
return;
}
length = write(fd, test_data, sizeof(test_data));
if (length != sizeof(test_data))
{
rt_kprintf("append write data failed\n");
close(fd);
return;
}
/* �ر��ļ� */
close(fd);
/* ֻ����������У�� */
fd = open(TEST_FN, O_RDONLY, 0);
if (fd < 0)
{
rt_kprintf("check: open file for read failed\n");
return;
}
length = read(fd, buffer, sizeof(buffer));
if (length != sizeof(buffer))
{
rt_kprintf("check: read file failed\n");
close(fd);
return;
}
for (index = 0; index < sizeof(test_data); index ++)
{
if (test_data[index] != buffer[index])
{
rt_kprintf("check: check data failed at %d\n", index);
close(fd);
return;
}
}
length = read(fd, buffer, sizeof(buffer));
if (length != sizeof(buffer))
{
rt_kprintf("check: read file failed\n");
close(fd);
return;
}
for (index = 0; index < sizeof(test_data); index ++)
{
if (test_data[index] != buffer[index])
{
rt_kprintf("check: check data failed at %d\n", index);
close(fd);
return;
}
}
/* ���������ϣ��ر��ļ� */
close(fd);
/* ��ӡ��� */
rt_kprintf("read/write done.\n");
}
#ifdef RT_USING_FINSH
#include <finsh.h>
FINSH_FUNCTION_EXPORT(readwrite, perform file read and write test);
#endif
|
