我用C写的读写硬盘的MBR和DBR扇区的程序。
/******************************************* * Master Boot Record Programme: * * Backup the Master Boot Sector * * Fix the Master Boot Sector * * Change the Partition Table * * -- by Crystal.Mouse 04/30/99 -- * * Turboc 2.0 * *******************************************/#include <ctype.h>#include <stdlib.h>#include <stdio.h>#include <bios.h>#include <io.h>#include <dos.h>#include <fcntl.h>#include <sys/stat.h>#include <conio.h>
/* define the */
char buff[512]; /*buffer for master boot sector *//* buffer1 backup for master boot sector */char buff1[512];/* This is the dos boot programme data */char sector2[512]={0xEB,0x3C,0x90,0x4D,0x53,0x57,0x49,0x4E,0x34,0x2E,0x31,0x00, 0x02,0x20,0x01,0x00,0x02,0x00,0x02,0x00,0x00,0xF8,0xC9,0x00, 0x3F,0x00,0x40,0x00,0x3F,0x00,0x00,0x00,0x01,0x0A,0x19,0x00, 0x80,0x00,0x29,0xDC,0x12,0x6F,0x04,0x30,0x34,0x32,0x36,0x39, 0x39,0x20,0x20,0x20,0x20,0x20,0x46,0x41,0x54,0x31,0x36,0x20, 0x20,0x20,0xFA,0x33,0xC9,0x8E,0xD1,0xBC,0xFC,0x7B,0x16,0x07, 0xBD,0x78,0x00,0xC5,0x76,0x00,0x1E,0x56,0x16,0x55,0xBF,0x22, 0x05,0x89,0x7E,0x00,0x89,0x4E,0x02,0xB1,0x0B,0xFC,0xF3,0xA4, 0x06,0x1F,0xBD,0x00,0x7C,0xC6,0x45,0xFE,0x0F,0x8B,0x46,0x18, 0x88,0x45,0xF9,0x38,0x4E,0x24,0x7D,0x22,0x8B,0xC1,0x99,0xE8, 0x77,0x01,0x72,0x1A,0x83,0xEB,0x3A,0x66,0xA1,0x1C,0x7C,0x66, 0x3B,0x07,0x8A,0x57,0xFC,0x75,0x06,0x80,0xCA,0x02,0x88,0x56, 0x02,0x80,0xC3,0x10,0x73,0xED,0x33,0xC9,0x8A,0x46,0x10,0x98, 0xF7,0x66,0x16,0x03,0x46,0x1C,0x13,0x56,0x1E,0x03,0x46,0x0E, 0x13,0xD1,0x8B,0x76,0x11,0x60,0x89,0x46,0xFC,0x89,0x56,0xFE, 0xB8,0x20,0x00,0xF7,0xE6,0x8B,0x5E,0x0B,0x03,0xC3,0x48,0xF7, 0xF3,0x01,0x46,0xFC,0x11,0x4E,0xFE,0x61,0xBF,0x00,0x07,0xE8, 0x23,0x01,0x72,0x39,0x38,0x2D,0x74,0x17,0x60,0xB1,0x0B,0xBE, 0xD8,0x7D,0xF3,0xA6,0x61,0x74,0x39,0x4E,0x74,0x09,0x83,0xC7, 0x20,0x3B,0xFB,0x72,0xE7,0xEB,0xDD,0xBE,0x7F,0x7D,0xAC,0x98, 0x03,0xF0,0xAC,0x84,0xC0,0x74,0x17,0x3C,0xFF,0x74,0x09,0xB4, 0x0E,0xBB,0x07,0x00,0xCD,0x10,0xEB,0xEE,0xBE,0x82,0x7D,0xEB, 0xE5,0xBE,0x80,0x7D,0xEB,0xE0,0x98,0xCD,0x16,0x5E,0x1F,0x66, 0x8F,0x04,0xCD,0x19,0xBE,0x81,0x7D,0x8B,0x7D,0x1A,0x8D,0x45, 0xFE,0x8A,0x4E,0x0D,0xF7,0xE1,0x03,0x46,0xFC,0x13,0x56,0xFE, 0xB1,0x04,0xE8,0xC1,0x00,0x72,0xD6,0xEA,0x00,0x02,0x70,0x00, 0xB4,0x42,0xEB,0x2D,0x60,0x66,0x6A,0x00,0x52,0x50,0x06,0x53, 0x6A,0x01,0x6A,0x10,0x8B,0xF4,0x74,0xEC,0x91,0x92,0x33,0xD2, 0xF7,0x76,0x18,0x91,0xF7,0x76,0x18,0x42,0x87,0xCA,0xF7,0x76, 0x1A,0x8A,0xF2,0x8A,0xE8,0xC0,0xCC,0x02,0x0A,0xCC,0xB8,0x01, 0x02,0x8A,0x56,0x24,0xCD,0x13,0x8D,0x64,0x10,0x61,0x72,0x0A, 0x40,0x75,0x01,0x42,0x03,0x5E,0x0B,0x49,0x75,0x77,0xC3,0x03, 0x18,0x01,0x27,0x0D,0x0A,0x49,0x6E,0x76,0x61,0x6C,0x69,0x64, 0x20,0x73,0x79,0x73,0x74,0x65,0x6D,0x20,0x64,0x69,0x73,0x6B, 0xFF,0x0D,0x0A,0x44,0x69,0x73,0x6B,0x20,0x49,0x2F,0x4F,0x20, 0x65,0x72,0x72,0x6F,0x72,0xFF,0x0D,0x0A,0x52,0x65,0x70,0x6C, 0x61,0x63,0x65,0x20,0x74,0x68,0x65,0x20,0x64,0x69,0x73,0x6B, 0x2C,0x20,0x61,0x6E,0x64,0x20,0x74,0x68,0x65,0x6E,0x20,0x70, 0x72,0x65,0x73,0x73,0x20,0x61,0x6E,0x79,0x20,0x6B,0x65,0x79, 0x0D,0x0A,0x00,0x00,0x49,0x4F,0x20,0x20,0x20,0x20,0x20,0x20, 0x53,0x59,0x53,0x4D,0x53,0x44,0x4F,0x53,0x20,0x20,0x20,0x53, 0x59,0x53,0x7F,0x01,0x00,0x41,0xBB,0x00,0x07,0x80,0x7E,0x02, 0x0E,0xE9,0x40,0xFF,0x00,0x00,0x55,0xAA};
/* sector1 is the Master boot program data */char sector1[512]={0xFA,0x33,0xC0,0x8E,0xD0,0xBC,0x00,0x7C,0x8B,0xF4,0x50,0x07, 0x50,0x1F,0xFB,0xFC,0xBF,0x00,0x06,0xB9,0x00,0x01,0xF2,0xA5, 0xEA,0x1D,0x06,0x00,0x00,0xB8,0x01,0x02,0xBB,0x00,0x08,0xB9, 0x01,0x00,0xBA,0x80,0x00,0xCD,0x13,0xBF,0x00,0x06,0xBE,0x00, 0x08,0xB9,0x00,0x01,0xFC,0xF3,0xA7,0x74,0x14,0xBE,0x17,0x07, 0xE8,0x2F,0x01,0xB8,0x01,0x03,0xBB,0x00,0x06,0xB9,0x01,0x00, 0xBA,0x80,0x00,0xCD,0x13,0xBE,0xBE,0x07,0xB3,0x04,0x80,0x3C, 0x80,0x74,0x0E,0x80,0x3C,0x00,0x75,0x1C,0x83,0xC6,0x10,0xFE, 0xCB,0x75,0xEF,0xCD,0x18,0x8B,0x14,0x8B,0x4C,0x02,0x8B,0xEE, 0x83,0xC6,0x10,0xFE,0xCB,0x74,0x0D,0x80,0x3C,0x00,0x74,0xF4, 0xBE,0xAE,0x06,0xE8,0xF0,0x00,0xEB,0xFE,0xBF,0x05,0x00,0xBB, 0x00,0x7C,0xB8,0x01,0x02,0x57,0xCD,0x13,0x5F,0x73,0x0C,0x33, 0xC0,0xCD,0x13,0x4F,0x75,0xED,0xBE,0xD2,0x06,0xEB,0xE0,0xBE, 0xF7,0x06,0xBF,0xFE,0x7D,0x81,0x3D,0x55,0xAA,0x75,0xD4,0x8B, 0xF5,0xEA,0x00,0x7C,0x00,0x00,0x49,0x6E,0x76,0x61,0x6C,0x69, 0x64,0x20,0x70,0x61,0x72,0x74,0x69,0x74,0x69,0x6F,0x6E,0x20, 0x74,0x61,0x62,0x6C,0x65,0x2E,0x20,0x4F,0x68,0x2C,0x6D,0x79, 0x20,0x67,0x6F,0x64,0x21,0x00,0x45,0x72,0x72,0x6F,0x72,0x20, 0x6C,0x6F,0x61,0x64,0x69,0x6E,0x67,0x20,0x6F,0x70,0x65,0x72, 0x61,0x74,0x69,0x6E,0x67,0x20,0x73,0x79,0x73,0x74,0x65,0x6D, 0x2E,0x20,0x57,0x68,0x79,0x3F,0x00,0x4D,0x69,0x73,0x73,0x69, 0x6E,0x67,0x20,0x6F,0x70,0x65,0x72,0x61,0x74,0x69,0x6E,0x67, 0x20,0x73,0x79,0x73,0x74,0x65,0x6D,0x2E,0x20,0x53,0x68,0x69, 0x74,0x21,0x00,0x4D,0x61,0x73,0x74,0x65,0x72,0x20,0x42,0x6F, 0x6F,0x74,0x20,0x53,0x65,0x63,0x74,0x6F,0x72,0x20,0x63,0x68, 0x61,0x6E,0x67,0x65,0x64,0x2E,0x0A,0x0D,0x44,0x6F,0x6E,0x27, 0x74,0x20,0x77,0x6F,0x72,0x72,0x79,0x2C,0x49,0x20,0x68,0x61, 0x76,0x65,0x20,0x72,0x65,0x63,0x6F,0x76,0x65,0x72,0x65,0x64, 0x20,0x69,0x74,0x21,0x20,0x43,0x6C,0x65,0x76,0x65,0x72,0x21, 0x20,0x45,0x54,0x2D,0x4D,0x6F,0x75,0x73,0x65,0x20,0x59,0x65, 0x61,0x68,0x21,0x0A,0x0D,0x00,0xAC,0x3C,0x00,0x74,0x0B,0x56, 0xBB,0x07,0x00,0xB4,0x0E,0xCD,0x10,0x5E,0xEB,0xF0,0xC3,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x55,0xAA};
char fnwrite[20],fnread[20]; /* filename */FILE *fp; /* file pointer */int head,cylinder,sector,drive; /* harddisk head,cylinder sector drive */
/* define the key code */
#define ESC 0x011b#define LEFT 0x4b00#define RIGHT 0x4d00#define UP 0x4800#define DOWN 0x5000#define HOME 0x4700#define END 0x4f00#define PGUP 0x4900#define PGDN 0x5100#define F2 0x3c00#define F1 0x3b00
#define W 1#define R 0 /* flag for */#define D 0 /* flag for Dos Boot Sector */#define M 1 /* flag for Master Boot Sector */
/* declare the function */
int fileopen(int f,char *file); /*Read or Creat the backupfile */int writembr(char *file); /* write the buffer to master boot sector */int writedbr(char *file); /* write the buffer to dos boot sector */int backupmbr(char *file); /* backup the Master Boot record data */int backupdbr(char *file); /* backup the dos boot sector data */int printmbr(); /* print the master boot sector */int init(int f); /* init the operating */void help(); /*help*/void title(); /* display the infomation */int copypart(char *src,char *dest);void infina(char *file); /* open or creat the backup file */void closecur(); /* close the cursor */void opencur(); /* open the cursor */int display(); /* display the data */void interrupt(*reset)(); /* interrupt reset the machine */void resetwin(); /* reset the screen */void search(); /* search the dos boot sector */int detect(int num,int driver,int f); /* detect the drive */
int detect(int num,int driver,int f)/* detect the disk */{
union REGS r; r.h.ah=num; r.h.dl=driver; int86(0x13,&r,&r); if(f) return r.h.al; else return r.x.cflag;}
/* backup the dos boot sector */int backupdbr(char *file){ int flag=1; /* flag for success or not */ if(!fileopen(W,file)) {printf("/nBackup file write error!"); flag=0; } return flag;
}
/* rewrite the dos boot record */int writedbr(char *file){ int flag; /* flag for success or not */ char key; search(); /* search the the dos boot sector: head , cylinder and sector */ init(D); /* initialize the dos boot sector data to the buffer */ printf("/nWarning..."); printf("/nIt might destory your harddisk!"); printf("/nDo you want to a backup?(y/n)"); key=getch(); switch(key) { case 'y': case 'Y': infina(fnwrite); /* input the backup filename */ if(!backupdbr(fnwrite)) { printf("/nBackup error!"); flag=0; break; } case 'n': case 'N': if(!fileopen(R,file)) /* open the existed backup file data to buffer */ { printf("/nBackup file %s open error!",file); flag=0; return flag; } } /* rewrite the dos boot sector with the buffer data */ if(biosdisk(0x03,0x80,head,cylinder,sector,1,buff1)) { printf("/nWrite Master Boot Sector error!"); flag=0; } else { printf("/nWrite Dos Boot Sector OK!"); flag=1; }}
/* backup the Master Boot Sector data to file */int backupmbr(char *file){ int flag=1; init(M); /* initialize the master boot sector to the buffer */ if(!fileopen(W,file)) { printf("/nBackup file write error!"); flag=0; } return flag;}
int fileopen(int f,char *file)/* f for read or creat file */{ int flag=1; if(f==0) { if((fp=fopen(file,"rb"))!=NULL) { fread(buff1,512,1,fp); fclose(fp); } else flag=0; } if(f==1) { if((fp=fopen(file,"wb"))!=NULL) { fwrite(buff,512,1,fp); fclose(fp); } else flag=0; } return flag;}
int writembr(char *file){ int flag=1; char key; printf("/nWarning..."); printf("/nIt might destory your harddisk!"); printf("/nDo you want to a backup?(y/n)"); key=getch(); switch(key) { case 'y': case 'Y': infina(fnwrite); init(M); /* initialize the MBR to buffer */ if(!backupmbr(fnwrite)) /* backup the MBR */ { printf("/nBackup error!"); flag=0;
}
printf("/nFile %s backup ok!",fnwrite); if(!biosdisk(0x03,0x80,0,0,3,1,buff)) printf("/nThe old MBR write to head:0 , Cylinder:0 ,Sector:1 error!"); if(!biosdisk(0x03,0x80,0,0,5,1,buff)) printf("/nThe old MBR write to head:0 , Cylinder:0 ,Sector:1 error!"); printf("/nThe old MBR also backup to the harddisk side 0 cylinder 0 sector 3 and 5."); flag=1;
case 'n': case 'N': if(!fileopen(R,file)) /* open the existed backup file */ { printf("/nBackup file %s open error!",file); flag=0; return flag; } } if(biosdisk(0x03,0x80,0,0,1,1,buff1)) /* Rewrite the MBR with buffer1 */ { printf("/nWrite Master Boot Sector error!"); flag=0; } else { printf("/nWrite Master Boot Sector OK!"); flag=1; }
return flag;}
int init(int f){ int i; int result=1;
for(i=0;i<512;i++) /* initialize the buffer */ buff[i]=0; if(f) { if(biosdisk(0x02,0x80,0,0,1,1,buff)) /* read the Mbr to buffer */ { printf("/nMaster boot record read error!"); result=0; } } else if(biosdisk(0x02,0x80,head,cylinder,sector,1,buff)) { printf("/nDos Boot Sector read error!"); result=0; } return result;}
main(){ int far *res=(int far *)0x472; /* the data for reset */ int i,j,k; char key; reset=MK_FP(0xffff,0x0000); /* reset interrupt address */
clrscr(); while(1){ printf("/nSetMbr programme...('h' for help)"); printf("/n."); key=getch(); printf("%c",key); switch(key) { case 'H': case 'h': help(); break;/* rewrite the MBR sector */ case 'w': case 'W': infina(fnread); /* input the existed file name */ if(!writembr(fnread)) { printf("/nWrite HardDisk MBR error!"); printf("/nPress 'v' to check it."); printf("/nPress 'm' to fix it."); } else printf("/nWrite HardDisk MBR OK!"); break;
/* backup the MBR sector */ case 'b': case 'B': infina(fnwrite);
if(!backupmbr(fnwrite)) printf("/nBackup MBR error!"); else printf("/nBackup MBR OK!"); break;/* rewrite the dos boot sector */ case 'd': case 'D': infina(fnread); if(!writedbr(fnread)) { printf("/nWrite Dos Boot Sector error!"); printf("/nPress 'v' to view the Dos Boot Sector!"); break; } break;/* backup the dos boot sector */ case 'o': case 'O': infina(fnwrite);
search(); init(D); if(!backupdbr(fnwrite)) printf("/nBackup Dos Boot Sector error!"); else printf("/nBackup Dos Boot Sector OK!"); break;/* rewrite the dos boot sector with default data */ case 'i': case 'I': search(); init(D); printf("/nIt would modify the Dos Boot secotr!"); printf("/nDo you want to backup?(Y/N)"); key=getch(); if(key=='y' || key=='Y') { infina(fnwrite); if(!backupmbr(fnwrite))
printf("/nBackup Error!");
else printf("/nBackup OK!"); } else if(key=='n' || key=='N') printf("/nWarning:it would modify the Dos Boot Sector!");/* write the sector2 to the dos boot sector */ if(biosdisk(0x03,0x80,head,cylinder,sector,1,sector2)!=0) printf("/nDos Boot Sector Write error!"); else printf("/nDos Boot Sector Write OK!");
break;/* reset the machine */ case 'r': case 'R': *res=0x1234; (*reset)();/* view the harddisk sector data */ case 'v': case 'V': search(); printmbr(); break;/* fixed the flappy boot sector */ case 'f': case 'F': printf("/nWhich dekette? -> (A,B,...):"); key=getch(); printf(" :",key); if(key>=97)
key=key-97; else key=key-65;/* if(detect(0x10,key,0)) { printf("/nDriver : not ready!",key+65); break; } else if(detect(0x13,key,1)==0x03) { printf("/nDriver : write protect!",key+65); break; } else */ if(biosdisk(0x03,key,0,0,1,1,sector2)) printf("/nDriver %c: write error!",key+65); else printf("/nDrive : write OK!",key+65);
break;/* fixed the MBR with default data */
case 'm': case 'M': printf("/nIt would modify the Master Boot Record."); printf("/nDo you want to backup?(Y/N)"); key=getch(); printf(" ",key); if(key=='y' || key=='Y') { infina(fnwrite); if(!backupmbr(fnwrite)) { printf("/nBackup Error!"); break; } } else if(key=='n' || key=='N') printf("/nWarning:it would modify the Master Boot Sector!"); init(M); if((buff[0x1be]&0x00ff)==0x80 || (buff[0x1be+16]&0x00ff)==0x80 || (buff[0x1be+32]&0x00ff)==0x80 || (buff[0x1be+48]&0x00ff)==0x80) copypart(buff+0x1be,sector1+0x1be); if(biosdisk(0x03,0x80,0,0,1,1,sector1)) { printf("/nHardDisk Write error!"); break; } else { printf("/nHardDisk Write OK!"); printf("/nPress 'v' to check it."); } break;/* dos shell */
case 's': case 'S': printf("/nPress 'Exit' to return...."); system(""); break;/* exit */ case 'q': case 'Q': title(); return 1;/* print the undefine command */ default: printf("
