int dealwithnor()
{//    glob_t mtdbuf;struct mtd_info_user mtd;struct erase_info_user erase;int blocks = 0;int i = 0;  //用于控制擦除的块的个数int k = 0;int written = 0;  //已写入的字节数，只初始化一次unsigned int size = StateOfImage.st_size;  //应该是镜像的实际大小，因为内存中大于镜像的空间的内容不可预知unsigned int result = 0;unsigned int DevNum = 0;    //设备的数量unsigned int StartDev = 0;  //从第startDev开始擦除char DevName[20] = {0};unsigned int AllSize = 0;#define MAXPARTITIONS 40struct DeviceInfo{int fd;char dir[20];uint32_t size;     // Total size of the MTD
        uint32_t erasesize;}DevInfo[MAXPARTITIONS];//用来存储设备信息
bzero(DevInfo, sizeof(struct DeviceInfo));/* 这是一种方法，但是有一个缺点，当mtd设备大于10个是，通过glob搜索出来的结果会出问题，下面采用会采用第二种方法 */
//    if(searchmtd(&mtdbuf) != 0){//        DEBUG("Sorry! Can not find mtd device\n");
//        return 1;   //返回大于零的数，表示升级失败
//    }
//    else
//    {
//        int fd;
//
//        DEBUG("find %d mtd devices \n",mtdbuf.gl_pathc);
//        DevNum = mtdbuf.gl_pathc;//        for(i=0; i<DevNum; i++)
//        {
//            fd = safeOpen (mtdbuf.gl_pathv[i],O_SYNC | O_RDWR);
//            if(fd < 0)
//            {
//                printf("failt to open\n");
//                return 1;
//            }
//            bzero(&mtd, sizeof(struct mtd_info_user));
//            if (ioctl(fd, MEMGETINFO,&mtd) < 0)
//            {
//                DEBUG("ioctl(): %m\n");
//                DEBUG("This doesn't seem to be a valid MTD flash device!\n");
//                return 1;
//            }
//
//            strcpy(DevInfo[i].dir, mtdbuf.gl_pathv[i]);
//            DevInfo[i].fd = fd;
//            DevInfo[i].size = mtd.size;
//            DevInfo[i].erasesize = mtd.erasesize;
//        }//        globfree(&mtdbuf);
//        for(i=0; i<DevNum; i++)
//        {
//            printf("\n\tinfo of %s\n",DevInfo[i].dir);
//            printf("%s.fd:            %d\n",DevInfo[i].dir, DevInfo[i].fd);
//            printf("%s.size:          %d\n",DevInfo[i].dir,DevInfo[i].size);
//            printf("%s.erasesize:     %d\n",DevInfo[i].dir,DevInfo[i].erasesize);
//        }
//    }/* 下面是第二种方法，这种方法克服了第一种方法的缺陷，不受mtd设备数量的限制 */for(i=0; i<MAXPARTITIONS; i++){int fd;sprintf(DevName, "%s%d", "/dev/mtd",i);if((fd = open (DevName,O_SYNC | O_RDWR)) > 0){bzero(&mtd, sizeof(struct mtd_info_user));if (ioctl(fd, MEMGETINFO,&mtd) < 0){DEBUG("ioctl(): %m\n");DEBUG("This doesn't seem to be a valid MTD flash device!\n");return 1;}strcpy(DevInfo[i].dir, DevName);DevInfo[i].fd = fd;DevInfo[i].size = mtd.size;DevInfo[i].erasesize = mtd.erasesize;}else{DevNum = i;break;}}for(i=0; i<DevNum; i++){printf("\n\tinfo of %s\n",DevInfo[i].dir);printf("%s.fd:            %d\n",DevInfo[i].dir, DevInfo[i].fd);printf("%s.size:          %d\n",DevInfo[i].dir,DevInfo[i].size);printf("%s.erasesize:     %d\n",DevInfo[i].dir,DevInfo[i].erasesize);AllSize += DevInfo[i].size;}if(AllSize < StateOfImage.st_size){DEBUG("ERROR!! all device size is less than ImageSize\n");return 1;}for(i=StartDev; i<DevNum; i++){/*** 先进行擦除操作 */int j = 0;g_AllImgSize = DevInfo[i].size;g_AllImgWrite = 0;erase.start = 0; blocks = DevInfo[i].size / mtd.erasesize;  //计算要擦除的块的个数erase.length = mtd.erasesize;printf ("\nbegin to erase block %s\n", DevInfo[i].dir);for (j= 1; j <= blocks; j++){fprintf(stderr, "\rErasing blocks: %d/%d (%d%%)", j, blocks, (int)PERCENTAGE (j, blocks));g_percentage = 100 * ((float)g_AllImgWrite / g_AllImgSize);if (ioctl(DevInfo[i].fd, MEMERASE, &erase) < 0){DEBUG("\n");DEBUG("While erasing blocks 0x%.8x-0x%.8x on %s\n",\(unsigned int) erase.start, (unsigned int) (erase.start + erase.length), DevInfo[i].dir);/*return "Error while erasing blocks";*/return 1;}g_AllImgWrite += erase.length;erase.start += mtd.erasesize;}printf("\n\rErased blocks: %d/%d (100%%)\n", blocks, blocks); /*** 再进行写操作 */printf ("\nbegin to write block %s\n\n", DevInfo[i].dir);g_AllImgWrite = 0;k = BUFSIZE;while (size){if (size < BUFSIZE){k = size;} printf("\033[1A");printf("\r%s usage: %dk/%dk (%d%%)\n",\DevInfo[i].dir, KB (g_AllImgWrite + k), KB (DevInfo[i].size), (int)PERCENTAGE (g_AllImgWrite + k, DevInfo[i].size)); fprintf(stderr, "Writing data: %dk/%ldk (%d%%)", KB (written + k), KB (StateOfImage.st_size), (int)PERCENTAGE (written + k, StateOfImage.st_size));result = write(DevInfo[i].fd, &upPack[written], k);if (k != result){DEBUG ("\n");if (result < 0){DEBUG("While writing data to 0x%.8x-0x%.8x on %s\n", written, written + k, DevInfo[i].dir);return 1;}DEBUG("Short write count returned while writing to x%.8x-0x%.8x on %s: %d/%d bytes written to flash\n", \written,written + k, DevInfo[i].dir, written + result, DevInfo[i].size);return 1;}written += k;size -= k;g_AllImgWrite += k;if(g_AllImgWrite >= DevInfo[i].size){   g_AllImgWrite = 0;printf("\n");break;}} printf("Wrote %d / %ldk bytes\n", written, (unsigned long int)(StateOfImage.st_size));        }munmap(upPack, UPGRADE_SHM_SIZE);for(i=0; i<DevNum; i++){close (DevInfo[i].fd);printf("%s is closed!\n",DevInfo[i].dir);}return 0;
}