linux scsi命令读取文件

SCSI Read(10)是一种用于从SCSI设备读取数据的命令。下面是一个简单的示例代码，演示如何使用SCSI Read(10)命令来读取指定大小的文件：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>#define READ_CAPACITY_CMD    0x25
#define READ_10_CMD          0x28#define DATA_BUFFER_SIZE     4096void scsi_read(FILE* scsi_device, unsigned long long start_sector, unsigned int block_size, unsigned int num_blocks)
{unsigned char read_buffer[DATA_BUFFER_SIZE];unsigned char read_cmd[10] = {READ_10_CMD,0x00,(start_sector >> 24) & 0xFF,(start_sector >> 16) & 0xFF,(start_sector >> 8) & 0xFF,start_sector & 0xFF,0x00,(num_blocks >> 8) & 0xFF,num_blocks & 0xFF,0x00};memset(read_buffer, 0, sizeof(read_buffer));fseek(scsi_device, 0, SEEK_SET);  // 将文件指针移到开始位置// 发送SCSI命令fwrite(read_cmd, 1, sizeof(read_cmd), scsi_device);fflush(scsi_device);// 读取数据fread(read_buffer, block_size, num_blocks, scsi_device);// 可以在这里对读取到的数据进行处理或保存// 打印读取到的内容（仅用于示例）printf("Read Data:\n");for (int i = 0; i < num_blocks * block_size; i++){printf("%02X ", read_buffer[i]);if ((i + 1) % block_size == 0)printf("\n");}
}int main()
{// 打开SCSI设备文件（假设为/dev/sdc）FILE* scsi_device = fopen("/dev/sdc", "rb");if (scsi_device == NULL){printf("Failed to open SCSI device.\n");return 1;}unsigned long long start_sector = 0;   // 起始扇区unsigned int block_size = 512;         // 块大小（字节）unsigned int num_blocks = 10;          // 读取的块数// 调用SCSI读取函数scsi_read(scsi_device, start_sector, block_size, num_blocks);// 关闭SCSI设备文件fclose(scsi_device);return 0;
}

注意：上述代码仅为演示目的，请谨慎操作并确保对SCSI设备的访问有合法的权限。在实际使用时，请根据您的需求和环境进行相应的修改和错误处理。