_chdrive - Change Current Working Drive

Syntax

#include <direct.h>
int _chdrive(int drive);

chdrive changes the current working drive to the drive specified. The drive variable is an integer value representing the number of the new working drive (A: is 1, B: is 2, and so on).
To change the default drive, include <os2.h>, define INCL_DOSFILEMGR, and use DosSetDefaultDisk to pass the appropriate command to the operating system. You can also use DosQueryCurrentDisk to query the disk. For more information, refer to the Control Program Guide and Reference.

chdrive returns 0 if it is successful in changing the working drive. A return value of -1 indicates an error; _chdrive sets errno to EOS2ERR.

This example uses _chdrive to change the current working drive to C:.

#include <direct.h>
#include <stdio.h>

int main(void)
{
   if (_chdrive(3))
      printf("Cannot change current working drive to 'C' drive.\n");
   else {
      printf("Current working drive changed to ");
      printf("'%c' drive.\n", ('A'+_getdrive()-1));
   }
   return 0;

   /****************************************************************************
      The output should be similar to :

      Current working drive changed to 'C' drive.
   ****************************************************************************/
}

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