rom/dos/currentdir.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <proto/exec.h>
   9 #include <aros/debug.h>
  10 #include "dos_intern.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/dos.h>
  16
  17         AROS_LH1(BPTR, CurrentDir,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(BPTR, lock, D1),
  21
  22 /*  LOCATION */
  23         struct DosLibrary *, DOSBase, 21, Dos)
  24
  25 /*  FUNCTION
  26         Sets a new directory as the current directory. Returns the old one.
  27         0 is valid in both cases and represents the boot filesystem.
  28
  29     INPUTS
  30         lock - Lock for the new current directory.
  31
  32     RESULT
  33         Old current directory.
  34
  35     NOTES
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42
  43     INTERNALS
  44
  45 *****************************************************************************/
  46 {
  47     AROS_LIBFUNC_INIT
  48
  49     /* Get pointer to process structure */
  50     struct Process *me=(struct Process *)FindTask(NULL);
  51     BPTR old;
  52
  53     ASSERT_VALID_PROCESS(me);
  54
  55     ASSERT_VALID_PTR_OR_NULL(BADDR(lock));
  56
  57     /* Nothing spectacular */
  58     old=me->pr_CurrentDir;
  59     me->pr_CurrentDir=lock;
  60     ASSERT_VALID_PTR_OR_NULL(BADDR(old));
  61     return old;
  62     AROS_LIBFUNC_EXIT
  63 } /* CurrentDir */