/* access for MMIXware.   Copyright (C) 2001 Hans-Peter Nilsson   Permission to use, copy, modify, and distribute this software is   freely granted, provided that the above copyright notice, this notice   and the following disclaimer are preserved with no changes.   THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR   PURPOSE.  */#include <fcntl.h>#include <sys/stat.h>#include <unistd.h>#include "sys/syscall.h"#include <errno.h>intaccess (const char *fn, int flags){  /* Ugh.  We don't have stat (), so we can't copy the other     implementations.  Opening a directory as a file usually works, so     let's try and open it and use the openability, regardless of what     kind of test or file it is.  */  long ret;  /* We'll just assume that if we can open the file for reading, then it's     Z-able, no matter what Z was.  */  ret = TRAP3f (SYS_Fopen, TMPFNO, fn, BinaryRead);  if (ret == 0)    {      /* Yes, this was readable.  As in other simulator access functions,	 we always return success in this case (though the others check	 for directory access).  */      TRAP1f (SYS_Fclose, TMPFNO);      return 0;    }  errno = EACCES;  return -1;}