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/* 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>

int

access (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;

}