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| test.c
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include "chardevice.h"
#define FILE_FILENAME "a.txt"
int ioctl_alloc_buffer(unsigned int len)
{
int fd_device, ret;
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("ioctl_alloc_buffer : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
ret = ioctl(fd_device, IOCTL_ALLOC_BUFFER, len);
if (ret < 0) {
printf("ioctl_alloc_buffer : failed , ret = %d\n", ret);
}
printf("ioctl_alloc_buffer : success !\n");
close(fd_device);
return ret;
}
int ioctl_set_data(char *data)
{
int fd_device, ret;
char *p = NULL;
char buff[MAX_SIZE];
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("ioctl_set_data : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
ret = ioctl(fd_device, IOCTL_SET_DATA, data);
if (ret < 0) {
printf("ioctl_set_data : failed , ret = %d\n", ret);
}
printf("ioctl_set_data : data = %s \n", data);
close(fd_device);
return ret;
}
int ioctl_get_data()
{
int fd_device, ret;
char *p = NULL;
char buff[MAX_SIZE];
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("ioctl_get_data : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
ret = ioctl(fd_device, IOCTL_GET_DATA, buff);
if (ret < 0) {
printf("ioctl_get_data : failed , ret = %d\n", ret);
}
printf("ioctl_get_data : data = %s \n", buff);
close(fd_device);
return ret;
}
int file_mmap_write(char *data, unsigned int data_len)
{
int fd_device, ret;
char *p = NULL;
char buff[MAX_SIZE];
if(data_len > MAX_SIZE){
printf("file_mmap_write : error! mmap size over than %u \n", MAX_SIZE);
return -1;
}
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("file_mmap_write : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
p = (char*)mmap(0, data_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd_device, 0);
printf("file_mmap_write : writing txt to driver , data = %s \n", data);
sprintf(p, "%s", data);
munmap(p, data_len);
close(fd_device);
}
int file_mmap_read(unsigned int data_len)
{
int fd_device, ret;
char *p = NULL;
char buff[MAX_SIZE];
if(data_len > MAX_SIZE){
printf("file_mmap_write : error! mmap size over than %u \n", MAX_SIZE);
return -1;
}
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("file_mmap_write : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
p = (char*)mmap(0, data_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd_device, 0);
printf("file_mmap_read : reading txt from driver , data = %s \n", p);
munmap(p, data_len);
close(fd_device);
}
int file_write(char *data)
{
int fd_device, ret;
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("file_write : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
ret = write(fd_device, data, MAX_SIZE);
if(fd_device < 0) {
printf("file_write : fail to write %s \n", DEVICE_FILENAME);
return -1;
}
printf("file_write : writing txt to driver , data = %s \n", data);
close(fd_device);
}
int file_read()
{
int fd_device, ret;
char buff[MAX_SIZE];
fd_device = open(DEVICE_FILENAME, O_RDWR|O_NDELAY);
if(fd_device < 0) {
printf("file_read : fail to open %s \n", DEVICE_FILENAME);
return -1;
}
ret = read(fd_device, buff, MAX_SIZE);
printf("file_read : reading txt from driver , data = %s \n", buff);
close(fd_device);
}
int test()
{
int fd_file, ret;
char buff[MAX_SIZE];
//从 a.txt 读取数据存到 buff 中
fd_file = open(FILE_FILENAME, O_RDWR|O_NDELAY);
if(fd_file < 0) {
printf("fail to open %s \n", FILE_FILENAME);
return -1;
}
ret = read(fd_file, buff, MAX_SIZE);
if(ret < 0){
printf("fail to read %s \n", FILE_FILENAME);
return ret;
}
else if(ret == 0)
{
printf("%s is empty \n", FILE_FILENAME);
}
else
{
printf("a.txt content = %s \n", buff);
}
//ioctl 测试
//请求驱动申请一块 MAX_SIZE 大小的内核内存
ioctl_alloc_buffer(MAX_SIZE);
//向内核内存存入 buff 中的数据
ioctl_set_data(buff);
//从内核内存获取数据并打印出来
ioctl_get_data();
//mmap 测试
//mmap 内核内存到用户态内存，并存入 buff 中的数据
file_mmap_write(buff, MAX_SIZE);
//mmap 内核内存到用户态内存，获取数据并打印出来
file_mmap_read(MAX_SIZE);
//read write 测试
//写 buff 到驱动驱动申请的内核内存
file_write(buff);
//读内核内存并打印出来
file_read();
}
extern char *optarg;
int main(int argc, char *argv[])
{
int fd_file, ret;
unsigned int buff_size;
char buff[MAX_SIZE], *file_path;
char optStr[] = "l:f:h";
int c;
//解析命令行参数
while ((c = getopt(argc, argv, optStr)) != -1) {
switch (c) {
case 'l':
printf("set buffer size = %s\n", optarg);
buff_size = atol(optarg);
break;
case 'f':
file_path = optarg;
printf("select file path = %s\n", file_path);
break;
case 'h':
printf("test -l <set_buffer_size> -f <file_to_copy>\n");
break;
}
}
//请求驱动申请一块 MAX_SIZE 大小的内核内存
if(buff_size <= 0){
printf("test : the size of buff is invalied , buff_size = %u \n", buff_size);
return -1;
}
ioctl_alloc_buffer(buff_size);
//从 a.txt 读取数据存到 buff 中
fd_file = open(file_path, O_RDWR|O_NDELAY);
if(fd_file < 0) {
printf("fail to open %s \n", file_path);
return -1;
}
ret = read(fd_file, buff, buff_size);
if(ret < 0){
printf("fail to read %s \n", file_path);
return ret;
}
else if(ret == 0)
{
printf("%s is empty \n", file_path);
}
else
{
printf("%s content = %s \n", file_path, buff);
}
file_mmap_write(buff, buff_size);
file_mmap_read(buff_size);
return 0;
}
|
