getdfree

raw OCR

Gets disk free space.

Defined in header <dos.h>

Syntax

#include <dos.h>
void getdfree(unsigned   char drive, struct dfree *dtable);

Portability

DOS	UNIX	Windows	ANSI C	C++ only
■		■

Remarks

getdfree accepts a drive specifier in drive (0 for default, 1 for A, and so on) and fills the dfree structure pointed to by dtahle with disk attributes.

The dfree structure is defined as follows:

struct dfree {

unsigned df_avail;	/* available clusters *
unsigned df_total;	/* total clusters */
unsigned df_bsec;	/* bytes per sector */
unsigned df_sclus; };	/* sectors per cluster

Return value

getdfree returns no value. In the event of an error, df_sclus in the dfree structure is set to 0xFFFF.

Example

Unclude  <stdio.h>
#include <stdlib.h>
#include <dir.h>
#include <dos.h>
int main (void)
{
   struct dfree free;
   long avail;
   int drive;
   drive = getdiskO  ;
   getdfree (drive+1, &free);
   if (free.df_sclus == 0xFFFF)  {
      printf ("Error in getdfree() call\n");
      exit(l);
   }
   avail =  (long) free.df_avail * (long) free.df_bsec * (long) free.df_sclus;
   printf ("Drive %c: has %ld bytes available\n", 'A' + drive, avail);
   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/getdfree/ · short form /3.1/getdfree/