cofi.c

硬盘扇区读写技术－修复硬盘与恢复文件随书源代码

//********************************************
//文件名：COFI.C
//功能：1. 调用读扇区汇编子程序
//      2. 通过连续读取扇区，每次恢复一个簇的文件数据
//********************************************
#include<stdio.h>                         //1.
extern RHD(int,int,int,int,char *);       //2.声明读扇区汇编子程序
void main()                               //3.
{                                         //4.
  FILE *tmfp,*fp;                         //5.
  int i,j;                                //6.
  unsigned int m;                         //7.
  unsigned char h[512];                   //8.
  char name[13];                          //9.
  char sh[13];                            //10.
  unsigned long k;                        //11.
  unsigned char s1,s2,s3,s4;              //12.
  printf("Enter create file name: ");     //13.
  scanf("%s",sh);                         //14.输入建立的文件名
  printf("Enter sector number: ");        //15.
  scanf("%lu",&k);                        //16.输入一个簇的首扇区号
  printf("Enter sector block count: ");   //17.
  scanf("%u",&m);                         //18.输入一个簇的扇区数
  for(j=1;j<=m;j++)                       //19.
  {                                       //20.
    tmfp=tmpfile();                       //21.
    fwrite(&k,4,1,tmfp);                  //22.
    rewind(tmfp);                         //23.
    fread(&s4,1,1,tmfp);                  //24.
    fread(&s3,1,1,tmfp);                  //25.
    fread(&s2,1,1,tmfp);                  //26.
    fread(&s1,1,1,tmfp);                  //27.
    fclose(tmfp);                         //28.
    tmpnam(name);                         //29.
    RHD(s1,s2,s3,s4,name);                //30.调用读扇区汇编子程序
    fp=fopen(name,"rb");                  //31.打开临时文件
    for(i=0;i<=511;i++)                   //32.
    {  h[i]=fgetc(fp);  }                 //33.将数据读入数组
    fclose(fp);                           //34.
    fp=fopen(sh,"ab+");                   //35.以填加方式打开目的文件
    for(i=0;i<=511;i++)                   //36.
    {  fputc(h[i],fp);  }                 //37.将数据输出到文件
    fclose(fp);                           //38.
    k++;                                  //39.
    remove(name);                         //40.删除临时文件
  }                                       //41.
}                                         //42.