Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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/* DRIVES.C illustrates drive functions including:
 *      _getdrive       _chdrive        _getdcwd
 *
 * See DIRECT.C for an example of getcwd.
 */
 
#include <stdio.h>
#include <conio.h>
#include <direct.h>
#include <stdlib.h>
 
void main()
{
    int ch, drive, curdrive;
    static char path[_MAX_PATH];
 
    /* Save current drive. */
    curdrive = _getdrive();
 
    printf( "Available drives are: \n" );
 
    /* If we can switch to the drive, it exists. */
    for( drive = 1; drive <= 26; drive++ )
        if( !_chdrive( drive ) )
            printf( "%c: ", drive + 'A' - 1 );
 
    while( 1 )
    {
        printf( "\nType drive letter to check or ESC to quit: " );
        ch = getch();
        if( ch == 27 )
            break;
        if( _getdcwd( toupper( ch ) - 'A' + 1, path, _MAX_PATH ) != NULL )
            printf( "\nCurrent directory on that drive is %s\n", path );
    }
 
    /* Restore original drive. This is only necessary for DOS. Under OS/2,
     * the current drive of the calling process is always restored.
     */
    _chdrive( curdrive );
}