_WCRTLINK int dup( int old_hid )
{
HANDLE new_handle;
int hid;
HANDLE cprocess;
__handle_check( old_hid, -1 );
// First try to get the required slot.
// No point in creating a new handle only to not use it. JBS 99/11/01
hid = __allocPOSIXHandle( DUMMY_HANDLE );
if( hid == -1 ) {
return( -1 );
}
cprocess = GetCurrentProcess();
if( !DuplicateHandle( cprocess, __getOSHandle( old_hid ), cprocess,
&new_handle, 0, TRUE, DUPLICATE_SAME_ACCESS ) ) {
// Give back the slot we got
__freePOSIXHandle( hid );
return( __set_errno_nt() );
}
// Now use the slot we got
__setOSHandle( hid, new_handle ); // JBS 99/11/01
__SetIOMode( hid, __GetIOMode( old_hid ) );
return( hid );
}
_WCRTLINK unsigned _dos_open( const char *name, unsigned mode, int *posix_handle )
{
HANDLE handle;
unsigned rwmode;
DWORD share_mode;
DWORD desired_access, os_attr;
unsigned iomode_flags;
int hid;
// First try to get the required slot.
// No point in creating a file only to not use it. JBS 99/11/01
hid = __allocPOSIXHandle( DUMMY_HANDLE );
if( hid == -1 ) {
return( __set_errno_dos_reterr( ERROR_NOT_ENOUGH_MEMORY ) );
}
rwmode = mode & OPENMODE_ACCESS_MASK;
__GetNTAccessAttr( rwmode, &desired_access, &os_attr );
__GetNTShareAttr( mode & (OPENMODE_SHARE_MASK|OPENMODE_ACCESS_MASK),
&share_mode );
handle = CreateFile( (LPTSTR) name, desired_access, share_mode, 0,
OPEN_EXISTING, os_attr, NULL );
if( handle == (HANDLE)-1 ) {
__freePOSIXHandle( hid );
return( __set_errno_nt_reterr() );
}
// Now use the slot we got.
__setOSHandle( hid, handle ); // JBS 99/11/01
*posix_handle = hid;
iomode_flags = 0;
if( rwmode == O_RDWR )
iomode_flags = _READ | _WRITE;
if( rwmode == O_RDONLY )
iomode_flags = _READ;
if( rwmode == O_WRONLY )
iomode_flags = _WRITE;
__SetIOMode( hid, iomode_flags );
return( 0 );
}
