diskfree.c

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/*
* DISKFREE.C - Output the amount of free storage on a disk.
*
* PROGRAMMER:	    Martti Ylikoski
* CREATED:	    7.12.1990
*/
static char *VERSION = "Version 1.1, Copyright (c) Martti Ylikoski, 1990,1991" ;
/*
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <param.h>
#include <paramstd.h>
#define INCL_DOS
#define INCL_DOSFILEMGR
#include <os2.h>
static char *progname ;
extern unsigned long pflags ;
static int diskfree(USHORT usDisk) ;
ParamEntry pentry[12] = {
     "P", &ParamSetPause, 0,
     "F", &ParamSetFold, 0,
     "V", &ParamSetVerbose, 0,
     "R", &ParamSetReport, 1,
     "S", &ParamSetSubDirs, 0,
     "?", &ParamSetHelp, 1,
     "H", &ParamSetHelp, 1,
     "NOD", &ParamSetNoDefault, 0,
     "TEST", &ParamSetTest, 0,
     "Y", &ParamSetYes, 0,
     "N", &ParamSetTest, 0,
     "\0", NULL, 0
} ;

ParamBlock params = {
    "/-",   IGNORECASE | NOPRIORITY | NOTRIGGERSALLOWED ,
    pentry
} ;

int main(int argc, char *argv[])
{
USHORT ret, usDisk ;
ULONG ulDrives ;

int i, j ;

   progname = argv[0] ;

   ParamHandle(&params, &argc, argv) ;

   if (pflags & PA_HELP)
   {
      printf("%s- display the amount of free space on a disk.\n", progname) ;
      puts(VERSION) ;
      puts("Usage: diskfree [/H | /?] [/R] [drive(s)]") ;
      puts("Where,") ;
      puts("     /R    = Report    /H,/? = Help");
      return( 1 ) ;
   }

   if ( argc == 1 )
   {
      if (( ret = DosQCurDisk(&usDisk, &ulDrives)) != 0)
      {
	 fprintf(stderr,"%s: error in DosQCurDir ...\nExiting ...\n", progname) ;
	 return( 1 ) ;
      }
   }

   if (argc == 1)
      diskfree(usDisk) ;
   else
      for (i = 1 ; i <argc ; i++)
      {
	 usDisk = toupper( (int) argv[i][0] ) - 'A' + 1 ;
	 diskfree(usDisk) ;
      }
   return( 0 ) ;
}

static int diskfree(USHORT usDisk)
{
FSALLOCATE fsallocate ;
char p1[24], p2[24], p3[24] ;
int i, j ;
USHORT ret;
ULONG freedisk ;
ULONG totaldisk ;

   if (( ret = DosQFSInfo(usDisk, 1, (PBYTE) &fsallocate, sizeof(fsallocate))) != 0)
   {
      fprintf(stderr,"%s: error in DosQFSInfo ...\nExiting ...\n", progname) ;
      return( 1 ) ;
   }

   freedisk = fsallocate.cUnitAvail * fsallocate.cSectorUnit * fsallocate.cbSector ;
   totaldisk = fsallocate.cUnit * fsallocate.cSectorUnit * fsallocate.cbSector ;   
   sprintf(p1, "%lu", freedisk) ;
   sprintf(p3, "%lu", totaldisk) ;   
   strrev(p1) ;
   strrev(p3) ;   

   for (i=0, j = 0; i < strlen(p1) ; i++, j++)
   {
      if (i%3 == 0 && i != 0)
      {
	p2[j] = ',' ;
	j++;
      }

      p2[j] = p1[i] ;
   }
   p2[j] = '\0' ;
   strrev(p2) ;

   for (i=0, j = 0; i < strlen(p3) ; i++, j++)
   {
      if (i%3 == 0 && i != 0)
      {
	p1[j] = ',' ;
	j++;
      }

      p1[j] = p3[i] ;
   }
   p1[j] = '\0' ;
   strrev(p1) ;
   strcpy(p3,p1) ;

   
   if (pflags & PA_REPORT)
      printf("[DISKFREE]\nFreedisk=%ld\nTotaldisk=%ld\ndrive=%c:\n", freedisk, totaldisk, usDisk+'A'-1) ;
   else
      printf("\n%c: %s bytes free of %s bytes available.\n", usDisk+'A'-1, p2, p3 ) ;
}