How to get floppy disk information ?!!

[Master]

hi guys ..im asking for your help on solving this mind boggling problem ...
you know 2 or 3 month ago i wrote this piece of code in order to get the floppy disk geometry ...and it was as follows:

//In the name of GOD


#include <conio.h>
#include <stdio.h>
#include <process.h>
#include <dos.h>
#include <stdlib.h>
main(void){
int i,k,start,sector;
char x[512];
clrscr();
gotoxy(27,5);
textcolor(2);
cprintf("In the name of God\n");
gotoxy(22,7);
printf ("First project  Project\n\n");
cprintf ("         This program will show you the information stored on sector 0  of your Floppy disk.\n              if you are ready press any key to continue ");
for (k=0;k<=4;k++){
delay(500);
cprintf(".");       }
getch();
sector =0;
if (absread (0, 1, sector, &x)!=0){
cprintf ("Error");
exit(1);
}
gotoxy(30,8);
cprintf("Read Successful!\n\n\n");
for (i=0;i<=512;i++)
cprintf("%c",x[i]);
getch();
return 0;
}

after that i see some irrelevant characters on screen ... i just went after it and found some progs and also information concerning FAT
and it was :

{
  char jumpCode[3];//0 - 2 	Assembly Instruction for jump code.
   char oemName[8];//3 - 10 	OEM Name.
   char bytes_Sector[2];//*11 - 12 	Bytes per sector.
   char sec_Cluster;//13 	Sector per cluster.
   char size_Sector_Reserved[2];//14 - 15 	Number of reserved sector(Boot Sector)
   char fatCount;//16 	Number of File Allocation Table
   char Max_Root_Entry[2];//17 - 18 	Maximum entries possible under root directory.
   char Total_Sector_FS[2];//19 - 20 	Total number of sectors in file system.
   char Media_Type;//21 	Media Type(According to Microsoft 0xf8 for fixed disk and 0xf0 for removable disk.
   char sectors_per_fat[2];//22 - 23 	Sectors allocated for each File allocation table.
   char sectors_per_track[2];//24 - 25 	Sectors per track.
   char total_Head_Count[2];//26 - 27 	Number of head in storage device.
   char no_Sectors_Before_Part[4];//28 - 31 	Number of sectors before start of partition(Not applicable for floppy).
   char no_Sector_FS32[4];//32 - 35 	Number of sectors in file system(32-bit value, not applicable for floppy).
   char BIOS_13h_Drive_No;//36 	BIOS INT13h drive number.
   char reserved;//37 	Not Used.
   char ext_Boot_Part_Signature;//38 	Extended boot signature.
   char vol_Serial_Number[4];//39 - 42 	Volume Serial Number.
   char vol_Lebel_Name[11];//43 - 53 	Volume label in ASCII.
   char FS_Type[8];//54 - 61 	File System Type.
   char boot_Code[448];//62 - 509 	Boot Code, otherwise contains information to replace disk.
   char signature[2];//510 - 511 	Signature for File System.

i just tried to use loops to save the data of the specific regions of the floppy disk on the screen for example i used:

for(j=0;j<=2;j++)
printf("Assembly instruction for jump code : %C",&x[j])

but again no luck !!
im really confused !!! how to deal with it in C?
(ive already noticed the VC++ equivalent but i have not worked on Vc++ ,so i dont know anything about that ...please tell me and help me on C .... tell me how i can do it under C

oh by the way i was using TC 3 ..thats why it looks ancient ..( im using Pelles C now ..but it seems it doesnt have some header files such as Dos.h ..so i just used TC )

many tanx in advand

[TkTech]

the first sector of any fat disk is the bootsector. This stores a program that can be used to load a kernel or a boostrap, and it also stores the header information for the fat12 filesystem. it will always be padded to take up the entire section, anything else is a corrupt disk. use the structure you posted and sizeof() to load in the data for the filesystem table.

[Master]

would you mind if i ask you to show me how to do that ?
i mean usuing sizeof ? you mean sth like this ?
scanf("%c ",&sizeof(fdi.jumpcodes);
you mean sth like this ? if not i will be very thankfull if you correct me

tanx a million

[Master]

ive changed the code completely.. and here it is ,,,

//In the name of GOD
#include <stdio.h>
#include <process.h>
#include <string.h>
#include <conio.h>
#include <dos.h>

 int main(void)
{
    int j,i,k,start,sector;
    char buf[512],ch;
    clrscr();
    gotoxy(27,5);
    printf("In the name of God\n");
   gotoxy(22,7);
    printf("A S.Hossein hasan pour Project\n\n");
    printf ("         This program will show you the information stored on sector 0  of your hard Drive.\n              if you are ready press any key to continue ");
    for (k=0;k<=4;k++){
    //delay(50);
    printf(".");       }
    getch();
    sector =0;
    if (absread (0, 1, sector, buf)!=0)
	{
    printf ("Error");
    exit(1);
       }


   printf("Read Successful!\n");
 // fptr=fopen("D:\temp.fds","w");
 // for (i=0;i<=1;i++)
   //	{
     printf("\n\n      Begining Of the readind Infos from floppy disk\n\n\n");
     printf("\a                  Phase One is now being started\n\n\n");
		for(j=0;j<=2;j++)
			printf("Assembly Jump COde is: %#02x \n\n",buf[j]);

			printf("OEM IS:  %7s\n\n",&buf[j]);
	      for(j=11;j<12;j++);
		       printf("Bytes per sector:  %d\n\n",buf[j]);

		for(j=13;j<14;j++);
		       printf("sector per cluster is    :   %d\n\n",buf[j]);

		for(j=14;j<15;j++)
		      printf("number of reserved sectors :   %d\n\n",buf[j]);

		for(j=16;j<17;j++)
		 printf("fat count :   %d\n\n",buf[j]);
		printf("\a\aPhase 2:get ready for the next infos, when readly press enter\n\n\n\n\n");
		getch();
		delay(1000);

		for(j=17;j<18;j++)
		 printf("Max root entry is:   %d\n\n",buf[j]);


	    for(j=19;j<=20;j++)
		    printf("Total number of sectors in file system is:  %d\n\n\n ",  buf[j]);

	    for(j=21;j<22;j++)
		printf("Media Typeis:%#x\n\n",buf[j]);
		printf("According to Microsoft 0xf8 for fixed disk and 0xf0 for removable disk\n\n\n");

	    for(j=22;j<23;j++)
		printf("Sectors allocated for each File allocation table is:   %d\n\n ",buf[j]);

	   for(j=24;j<25;j++)
		printf("Sectors per track is:  %d\n\n",buf[j]);

	    for(j=26;j<27;j++)
		printf("Number of head in storage device is:      %d\n\n",buf[j]);

		printf("Phase 3: this is going to be the third part, get ready and press Enter\a\a\a\n\n\n");
		getch();
		delay(1000);

	      // for(j=28;j<=31;j++)
	       //printf("Number of sectors before start of partition(Not applicable for floppy)%d\n ",buf[j]);

	      // for(j=32;j<=35;j++)
	      // printf(" Number of sectors in file system(32-bit value, not applicable for floppy).%d\n",buf[j]);

	       for(j=36;j<37;j++)
	       printf("BIOS INT13h drive numberis:        %d\n\n",buf[j]);

	       for(j=38;j<39;j++)
	       printf("Extended boot signature is:       %#x\n\n",buf[j]);

	       for(j=39;j<=42;j++)
	       printf("Volume Serial Numberis  %d\n",buf[j]);

	       for(j=43;j<=53;j++)
	       printf("Volume label in ASCII %11s\n\n",buf[j]);


	      for(j=54;j<=61;j++);
	      printf("File System Type %c\n\n",buf[j]);
	     printf("\a\a\a\aPhase 4:Now get ready for the boot sector infos \n\n\n");
	     getch();

	      printf(" Boot Code, otherwise contains information to replace disk( in Assembly codes)\n\n");
	      for(j=65;j<=509;j++)
		printf("%#x",buf[j]);

		for(j=510;j<511;j++)
		printf("\n\nSignature for File System is:     %#x\n\n\n",buf[j]);
	     printf("       Programed By Seyyed Hossein Hasan Pour\n");
	     printf("     Date November 10th 2007 equals to 20 Aban 1386");
    getch();
    return 0;
}

Please tell me if any thing is wrong ..
tanx in advance

[dargueta]

Close, but not right. Try using this:

scanf("%*c",sizeof(fdi.jumpcodes),&fdi.jumpcodes);

[Master]

tanx

[Master]

by the way i made it some how .. but there is a slight problem here ..
i have difficulties on three point :
1. Bytes per sector(instead of getting 512 , i get 1!)
2.Number of files for root directory(instead of getting 224 , i get 64)
3.Total number of sectors in file system is (instead of geting 2880 i get sth else ..1 or 11 i think ... )

i tried using Sizeof() but id ddint help ... i even used "&" before the Buf[j], but i get a negative number !!!, i really dont know why ..
and after all , i made me add those variables to correct the information ..
is there any body who knows why this is happenig ? or why this gave me a negative numbers ..
here is what i wrote :

//In the name of GOD
//VERSION 1.0.2
/* These Codes were written in order to extract floppy geometry information ,i tested  this snippets of code under Dos 16 bit based Compilers such as Tc
 and it run great !
 A Piece of COde that extracts floppy disk geometry information, its  been writen in pure C and has been tested and ran seccessfully under TC 3 ...
 Cod3r :Seyyed HOssein hasn pour in NOvember 12th 2007
 www.PersianOs.org
Floppy DIsk information grabber ... fixed some bugs :lol
runs perfecly under Dos 16 bit based compilers... like TC (ancient fossil compiler :lol)
*/
#include <stdio.h>
#include <process.h>
#include <string.h>
#include <conio.h>
#include <dos.h>

 int main(void)
{
    int j,i,k,start,sector;
    char buf[512],ch;
    int C_S=1030; //Correct Sector
    int S_R=735;//Correct File Numbers for Root Directory
    int S_F=3389;//Correct Sector numbers In File System
    clrscr();
    gotoxy(27,5);
    printf("In the name of God\n");
   gotoxy(22,7);
    printf("A S.Hossein hasan pour Project\n\n");
    printf ("This program will show you the information stored on sector 0 of the Floppy Disk\n\n                        (FAT TABLE INFORMATION).\n\n\n              if you are ready press any key to continue ");
    for (k=0;k<=3;k++){
    //delay(50);
    printf(".");       }
    getch();
    sector =0;
    if (absread (0, 1, sector, buf)!=0)
	{
    printf ("Error");
    exit(1);
       }


   printf("Read Seccessfully !\n");
 // fptr=fopen("D:\temp.fds","w");
 // for (i=0;i<=1;i++)
   //	{
     printf("\n\n            Begining Of the readind Infos from floppy disk\n\n\n");
     printf("                      Phase One is now being started\n\n\n");
		for(j=0;j<=2;j++)

		       printf("Assembly Jump COde for byte\" %d\" is: %#x \n\n",j,buf[j]);

			printf("OEM IS:  %s\n\n",&buf[j]); //by formating the floppy disk you will get diffrent OEM names.to test this , just quick-format the floppy disk and run the program(make sure the flopy disk remains empty)
	      for(j=11;j<12;j++);
		       printf("Bytes per sector:  %d *\n\n",&buf[j+C_S]);

		for(j=13;j<14;j++);
		       printf("sector per cluster is    :   %d\n\n",buf[j]);

		for(j=14;j<15;j++)
		      printf("number of reserved sectors :   %d\n\n",buf[j]);

		for(j=16;j<17;j++)
		 printf("Number of Fats(File Allocation Table) :   %d\n\n\n",buf[j]);
		printf("         Phase 2:get ready for the next infos, when readly press enter\n\n\n\n\n");
		getch();
		delay(500);

		for(j=17;j<=18;j++);
		 printf("Number of files for root directory:   %d *\n\n",&buf[j+S_R]);

		for(j=19;j<=20;j++);
		printf("Total number of sectors in file system is:  %d *\n\n\n ",&buf[j+S_F]);

	    for(j=21;j<22;j++)
		printf("Media Typeis:%#x\n\n",buf[j]);
		printf("According to Microsoft 0xf8 for fixed disk and 0xf0 for removable disk\n\n\n");

	    for(j=22;j<23;j++)
		printf("Sectors allocated for each File allocation table is:   %d\n\n ",buf[j]);

	   for(j=24;j<25;j++)
		printf("Sectors per track is:  %d\n\n",buf[j]);

	    for(j=26;j<27;j++)
		printf("Number of head in storage device is:      %d\n\n\n",buf[j]);

		printf("    Phase 3: this is going to be the third part, get ready and press Enter\n\n\n\n");
		getch();
		delay(500);

	      // for(j=28;j<=31;j++)
	       //printf("Number of sectors before start of partition(Not applicable for floppy)%d\n ",buf[j]);

	      // for(j=32;j<=35;j++)
	      // printf(" Number of sectors in file system(32-bit value, not applicable for floppy).%d\n",buf[j]);

	       for(j=36;j<37;j++)
	       printf("BIOS INT13h drive numberis:      0x%x\n\n",buf[j]);

	       for(j=38;j<39;j++);
	       printf("Extended boot signature is:       %#x\n\n",buf[j]);

	       for(j=39;j<=42;j++);
	       printf("Volume Serial Numbers  %d\n",buf[j]);

	       for(j=43;j<=43;j++)
		printf("Volume label in ASCII %8s\n\n",buf[j]);

	      for(j=54;j<=61;j++);
	      printf("File System Type %c\n\n",buf[j]);
	     printf("Phase 4:Now get ready for the boot sector infos \n\n\n");
	     getch();

	      printf(" Boot Code, otherwise contains information to replace disk( in Assembly codes)\n\n");
	 for(j=65;j<=509;j++)
	 //note that you can also use "%#x"instead of"%c" to see the whole codes in hex,and also in that case meaningful,
	 //This contains both boot sector stuffs and the message altogether ,but as i mentioned before they will be printed as Hex codes

		printf("%c",buf[j]);

		for(j=510;j<511;j++);
		printf("\n\nSignature for File System is:     %#x\n\n\n",buf[j]);

	     printf("                 Programed By Seyyed Hossein Hasan Pour\n");
	     printf("                         November 10th 2007 ");
	 printf("\n                          wWw.Persianos.org ");
    getch();
    return 0;
}

[Master]

well , i decided to use a structure to hold data ..tell me if anything is wrong ... thanks

//In the name of GOD
/* Using Structure to hold data 
version 0.1
A Piece of COde that extracts floppy disk geometry information, its  been writen in pure C and has been tested and ran seccessfully under TC 3 ...
 Cod3r :Seyyed HOssein hasn pour in NOvember 12th 2007
 www.PersianOs.org*/
//||||||||||||||||||Define Session||||||||||||||||||||||
typedef unsigned char BYTE;
typedef short int     WORD;
typedef int          DWORD;
//|||||||||||||||||||Main Session|||||||||||||||||||||||
void profile_1(void);
#include <stdio.h>
#include <process.h>
#include <string.h>
#include <conio.h>
#include <dos.h>

 int main(void)
{
//|||||||||||||||||||Structure To hold data|||||||||||||
struct Floppy_DISK_INFORMATION
{
   BYTE jumpCode[3];
   BYTE oemName[8];
   WORD bytes_Sector;
   BYTE sec_Cluster;
   WORD size_Sector_Reserved;
   BYTE fatCount;
   WORD Max_Root_Entry;
   WORD Total_Sector_FS;
   BYTE Media_Type;
   WORD sectors_per_fat;
   WORD sectors_per_track;
   WORD total_Head_Count;
   DWORD no_Sectors_Before_Part;
   DWORD no_Sector_FS32;
   BYTE BIOS_13h_Drive_No;
   BYTE reserved;
   BYTE ext_Boot_Part_Signature;
   DWORD vol_Serial_Number;
   BYTE vol_Lebel_Name[11];
   BYTE FS_Type[8];
   BYTE boot_Code[448];
   WORD signature;
} fdi;

//|||||||||||||||||||Declaring variables|||||||||||||||||
    int j,i,start,sector;
    char buf[512];
    profile_1();
    sector =0;
//|||||||||||||||||Reading From Floppy Disk |||||||||||||
    if (absread (0, 1, sector,&fdi)!=0)
	{
    printf ("An Error Has Occurred!");
    exit(1);
       }


   printf("Read Seccessfully !\n");

 // fptr=fopen("D:\temp.fds","w");
 // for (i=0;i<=1;i++)
   //	{	    // Print floppy information on Console.

   printf("Floppy Disk Information: \n");
   printf("===========================\n");
   printf("Assembly Instruction to jump to Boot code: 0x%x\n",
	  fdi.jumpCode);
   printf("OEM Name: %s\n",&fdi.oemName);
   printf("Bytes per sector: %d\n",fdi.bytes_Sector);
   printf("Sector per cluster: %d\n", fdi.sec_Cluster);
   printf("Size in sector for reserved area(Boot Sector): %d\n",
	  fdi.size_Sector_Reserved);
   printf("Number of FATs(File Allocation Table): %d\n",
	  fdi.fatCount);
   printf("Number of files for root directory: %d\n",
	   fdi.Max_Root_Entry);
   printf("Number of Sectors in File System: %d\n",
	  fdi.Total_Sector_FS);
   printf("Media Type\n(According to Microsoft,0xF8 == fixed disk and 0xF0 == Removable disk):0x%x\n", fdi.Media_Type);
   printf("Number of Sectors for each FAT: %d\n",
	  fdi.sectors_per_fat);
   printf("Sectors per track: %d\n", fdi.sectors_per_track);
   printf("Number of head in storage device: %d\n",
	  fdi.total_Head_Count);
   printf("BIOS INT13h Drive number: 0x%x\n", fdi.BIOS_13h_Drive_No);
   printf("Volume Serial Number: %d\n", fdi.vol_Serial_Number);
   printf("Volume label Name: %s\n", fdi.vol_Lebel_Name);
   printf("Boot Sector Signature: 0x%x\n", fdi.signature);
	     printf("                 Programed By Seyyed Hossein Hasan Pour\n");
	     printf("                         November 10th 2007 ");
	 printf("\n                          wWw.Persianos.org ");    
getch();
     return 0;
    }
void profile_1(void)
{   int k;
    clrscr();
    gotoxy(27,5);
    printf("In the name of God\n");
   gotoxy(22,7);
    printf("A S.Hossein hasan pour Project\n\n");
    printf ("This program will show you the information stored on sector 0 of the Floppy Disk\n\n                        (FAT TABLE INFORMATION).\n\n\n              if you are ready press any key to continue ");
    for (k=0;k<=3;k++){
    //delay(50);
    printf(".");       }
    getch();
    }