Linux 自动检测U盘插入及复制文件到指定目录

1. 创建 monitor_fw_pthread.c 
    用于检测：
    a. 是否已插入U盘
    b. 是否发现新的固件 "NEW_FW_MAA"
    c. 复制固件到指定的目录下 "/usr/myinst/"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>
//#include <io.h>

#define WIN_FIRMWARE_NAME "NEW_FW_MAA"
#define WIN_TARGET_PATH "/usr/myinst/"

static char g_fwPath[255];


static int execmd(char* cmd,char* result)
{
    char buffer[128]; //定义缓冲区
    FILE* pipe = popen(cmd, "r"); //打开管道，并执行命令
    if (!pipe)
        return 0; //返回0表示运行失败

    while(!feof(pipe)) {
        if(fgets(buffer, 128, pipe)){ //将管道输出到result中
            strcat(result,buffer);
        }
    }

    pclose(pipe); //关闭管道
    return 1; //返回1表示运行成功
}



// is removed udisk ?
bool remove_udisk()
{
    bool ret = false;
    char cmd[255], result[1024];

    memset(cmd, 0x00, sizeof(cmd));
    memset(result, 0x00, sizeof(result));
    sprintf(cmd, "%s", "mount | grep /media/root");
    execmd(cmd, result);
    if(strlen(result) > 10)
    {
        printf("Info: UDisk until alive. \n");
    }
    else
    {
        printf("Info: UDisk was removed. \n");
        ret = true;
    }
    return ret;
}

bool found_udisk()
{
    bool ret = false;
    char cmd[255], result[1024];
    char *p;
    int i = 0;
    memset(cmd, 0x00, sizeof(cmd));
    memset(result, 0x00, sizeof(result));

    sprintf(cmd, "%s", "mount | grep /media/root");
    execmd(cmd, result);

    p = strstr(result, "/media/root/");
    if(p)
    {
        printf("Result: %s \n", result);
        printf("Info: Found an udisk insert. \n");
        memset(g_fwPath, 0x00, sizeof(g_fwPath));

        while(*p != 0x20)
        {
            g_fwPath[i] = *p;
            p++;
            i++;
        }
        printf("Fw path: %s \n", g_fwPath);

        ret = true;
    }

    return ret;
}

bool found_firmware()
{
    bool ret = false;
    char fileName[255];
    memset(fileName, 0x00, sizeof(fileName));
    sprintf(fileName, "%s/%s", g_fwPath, WIN_FIRMWARE_NAME);
    if(access(fileName, F_OK) == 0)
    {
        ret = true;
        printf("^_^ Found the new firmware. \n");
    }
    else
    {
        printf("^?^ Not found the new firmware. \n");
    }
    return ret;
}

void copy_firmware()
{
    char fileName[255], cmd[255];
    memset(fileName, 0x00, sizeof(fileName));
    memset(cmd, 0x00, sizeof(cmd));
    sprintf(fileName, "%s/%s", g_fwPath, WIN_FIRMWARE_NAME);
    sprintf(cmd, "cp %s %s/MAAV", fileName, WIN_TARGET_PATH);
    system(cmd);
    printf("copy firmware: %s to %s done. \n", fileName, WIN_TARGET_PATH);
}


int main(int argc, char* argv[])
{
    bool isIn = false;
    bool isRemove = false;
    bool isNewFw = false;
    memset(g_fwPath, 0x00, sizeof(g_fwPath));

    while(1)
    {
        if(isIn)
        {
            isRemove = remove_udisk();
            if(isRemove)
            {
                isRemove = false;
                isIn = false;
            }
        }
        else
        {
            isIn = found_udisk();
            if(isIn)
            {
                sleep(1);
                isNewFw = found_firmware();
                if(isNewFw)
                {
                    sleep(1);
                    copy_firmware();
                }
            }
        }

        sleep(2);
    }

}

2. 在 /root/.profile 下加入 
/usr/lginst/monitor_fw_pthread &