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 40     struct 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; }