getdfree

Remonter à Dos.h - Index

Header File

dos.h

Category

Directory Control Routines, Miscellaneous Routines

Prototype

void getdfree(unsigned char drive, struct dfree *dtable);

Description

Gets disk free space.

getdfree accepts a drive specifier in drive (0 for default, 1 for A, and so on) and fills the dfree structure pointed to by dtable 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 (unsigned) -1.

Example

 #include <stdio.h>
 #include <dos.h>
 #include <process.h>
 int main(void)
 {
   struct dfree free;
   long avail;
   getdfree(0, &free);
   if ( free.df_sclus == -1)
   {
     printf("Error in getdfree() call\n");
     exit(1);
   }
   avail = (long) free.df_avail
         * (long) free.df_bsec
         * (long) free.df_sclus;
   printf("The current drive has %ld bytes available\n", avail);
   return 0;
 }

Portability

POSIX	Win32	ANSI C	ANSI C++
	+