别的不说直接上代码,作用就是在Linux系统上可以直接判断哪个是USB设备节点，哪个是硬盘设备节点，如果想挂载某一个节点。想屏蔽某一个USB孔的USB设备，具体代码，正在整理中，下面是实际运行图片。
/***********************************************
> File Name: test.c
> Author: lizhu
> Mail: lizhu@qq.com
> Created Time: 2016年11月10日 星期四 9时05分05秒
***********************************************/
#include<stdio.h>
#include<unistd.h>
#include<string.h>
#include<stdlib.h>
#define DEVTYPE_DISK 2
#define DEVTYPE_U 3
//外部设备的子结构
typedef struct tagDevParam_T
{
unsigned char devname[12];
unsigned char devtype;///2----硬盘，3----U盘
unsigned char partition_count;
unsigned int dev_totalspace;//KB
unsigned int partition_size[12];/*分区大小，单位KB*/
} tagDevParam_t, *ptagDevParam_t;
typedef struct tagDevinfo_T
{
tagDevParam_t dev[8];
int devcount; /*总共的设备数量*/
int disk_num;
} tagDevinfo_t, *ptagDevinfo_t;
int DvrCpFile(char *srcFile, char *targetFile, int findString, char *string)
{
int ret = 0;
FILE *srcfp = NULL;
FILE *targetfp = NULL;
int length = 0;
ssize_t size;
size_t len = 0;
char *p = NULL;
char *line = NULL;
if(access(srcFile, F_OK) != 0)
{
printf("ERROR: src file is not exist!");
return -1;
}
if(ret == 0)
{
srcfp = fopen(srcFile, "r");
targetfp = fopen(targetFile, "w+");
if((targetfp != NULL) && (srcfp != NULL))
{
while((size = getline(&line, &len, srcfp)) != -1)
{
if(size > 0)
{
if(findString == 1)
{
p = strstr(line, string);
if(p != NULL)
{
length = fwrite(line, size, 1, targetfp);
}
}
else
{
length = fwrite(line, size, 1, targetfp);
}
}
}
fclose(srcfp);
fclose(targetfp);
if(line)
{
free(line);
}
ret = 0;
}
else
{
if(srcfp)
{
printf("ERROR: open flie %s", targetFile);
fclose(srcfp);
}
if(targetfp)
{
printf("ERROR: open flie %s", srcFile);
fclose(targetfp);
}
ret = -1;
}
}
return ret;
}
int CheckIsDiskOrUsbDisk(unsigned char *devname)
{
FILE *fp;
int ret = -1;
char buffer[80], * line = NULL;
ssize_t size;
size_t len = 0;
int fal=0;
memset(buffer, 0, 80);
char tmpfilename[64];
if(tmpnam(tmpfilename) == NULL)
{
sprintf(tmpfilename, "%s", "/tmp/check_dev_type.txt");
}
fp = fopen(tmpfilename, "w+");
sprintf(buffer, "/sys/block/%s/removable", devname);
DvrCpFile(buffer, tmpfilename, fal, NULL);
size = getline(&line, &len, fp);
fclose(fp);
ret = atoi(line);
switch(ret)
{
case 0:
ret = DEVTYPE_DISK;
break;
case 1:
ret = DEVTYPE_U;
break;
default:
ret = -1;
break;
}
if(line)
{
free(line);
}
remove(tmpfilename);
return ret;
}
int main(){
int xx=1,i=0,dev_tpye;
ssize_t size;
size_t len = 0;
unsigned char k;
tagDevinfo_t devinfo;
char tmp_devname[12];
char *line = NULL;
char *pname;
char *token;
char seps[] = " ";
FILE *fp = NULL;
bzero(tmp_devname, 12);
bzero(&devinfo, sizeof(devinfo));
DvrCpFile("/proc/partitions", "/tmp/partitions.txt", xx, "sd");
fp = fopen("/tmp/partitions.txt", "r");
/*获得系统 硬盘 和移动设备总结构*/
while((size = getline(&line, &len, fp)) != -1)
{
pname = strrchr(line, ' ');
if(pname == NULL)
continue;
pname++;
if(memcmp(pname, tmp_devname, 3) == 0) //新分区
{
i = 0;
token = strtok(line, seps);
while(token != NULL)
{
if(i == 2)
{
k=devinfo.dev[devinfo.devcount-1].partition_count;
devinfo.dev[devinfo.devcount-1].partition_size[k]=atoi(token);
}
i++;
token = strtok(NULL, seps);
}
devinfo.dev[devinfo.devcount-1].partition_count++;
}
else//新设备
{
memcpy(devinfo.dev[devinfo.devcount].devname, pname, 3);
i = 0;
token = strtok(line, seps);
while(token != NULL)
{
if(i == 2)
{
devinfo.dev[devinfo.devcount].dev_totalspace = atoi(token);
}
i++;
token = strtok(NULL, seps);
}
devinfo.devcount++;
}
memcpy(tmp_devname, pname, 3);
}
printf("dve count =%d\n",devinfo.devcount);
for(i = 0; i < devinfo.devcount; i++){
printf("dev name=%s\n",devinfo.dev[i].devname);
dev_tpye = CheckIsDiskOrUsbDisk(devinfo.dev[i].devname);
devinfo.dev[i].devtype = dev_tpye;
if(devinfo.dev[i].devtype == DEVTYPE_U)
{
printf("this is USB drive");
}
if(devinfo.dev[i].devtype == DEVTYPE_DISK)
{
printf("this is hard drive");
}
}
return 0;
}