getfat

raw OCR

Gets file allocation table information for given drive.

Defined in header <dos.h>

Syntax

#include <dos.h>
void getfat(unsigned  char drive, struct fatinfo *dtahle);

Portability

DOS	UNIX	Windows	ANSI C	C++ only
■		■

Remarks

getfat gets information from the file allocation table (FAT) for the drive specified by drive (0 for default, 1 for A, 2 for B, and so on), dtable points to the fatinfo structure to be filled in. The fatinfo structure filled in by getfat is defined as follows:

struct fatinfo {

char fi_sclus;	/* sectors per cluster */
char fi_fatid;	/* the FAT id byte */
unsigned fi_nclus;	/* number of clusters */
int fi_bysec; };	/* bytes per sector */

Return value

None.

Example

#include <stdio.h> *
#include <conio.h>
finclude <dos.h>
int mainO
{
   struct fatinfo diskinfo;
   int flag = 0;
   printf("Please insert a diskette  in drive 'A'\n");
   getchO ;
   getfat(1, &diskinfo) ; /* get drive information */
   printf("\nDrive A: is  ");
   switch((unsigned char) diskinfo. fi_fatid) {
      case 0xFD: printf ("a 360K low density\n");
                 break;
      case 0xF9: printfC'a 1.2 Meg  5-l/4\" or 720 K 3-l/2\"\n"
                 break;
      case OxFO: printf ("1.44 Meg 3-l/2\"\n");
                 break;  .
      default:   printf ("unformatted\n");
                 flag =1;
   }
if (!flag) {
   printf I"sectors per cluster: %5d\n", diskinfo.fi_sclus)
   printf I"number of clusters:  %5d\n", diskinfo.fi_nclus)
   printf("bytes per sector:     %5d\n", diskinfo.fi_bysec)
}
return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/dos.h/getfat/ · short form /3.1/getfat/