rom/dos/isfilesystem.c

   1 /*
   2     Copyright © 1995-2008, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Check if a device is a filesystem.
   6     Lang: English
   7 */
   8 #include <proto/exec.h>
   9 #include <dos/dosextens.h>
  10 #include <dos/filesystem.h>
  11 #include <proto/utility.h>
  12 #include "dos_intern.h"
  13 #include <string.h>
  14
  15 # define  DEBUG 0
  16 # include <aros/debug.h>
  17
  18 /*****************************************************************************
  19
  20     NAME */
  21 #include <proto/dos.h>
  22
  23         AROS_LH1(BOOL, IsFileSystem,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(CONST_STRPTR, devicename, D1),
  27
  28 /*  LOCATION */
  29         struct DosLibrary *, DOSBase, 118, Dos)
  30
  31 /*  FUNCTION
  32         Query the device whether it is a filesystem.
  33
  34     INPUTS
  35         devicename      - Name of the device to query.
  36
  37     RESULT
  38         TRUE if the device is a filesystem, FALSE otherwise.
  39
  40     NOTES
  41         DF0:, HD0:, ... are filesystems.
  42         CON:, PIPE:, AUX:, ... are not
  43
  44         In AmigaOS if devicename contains no ":" then result
  45         is always TRUE. Also volume and assign names return
  46         TRUE.
  47
  48     EXAMPLE
  49
  50     BUGS
  51
  52     SEE ALSO
  53
  54     INTERNALS
  55
  56 *****************************************************************************/
  57 {
  58     AROS_LIBFUNC_INIT
  59
  60     struct IOFileSys iofs;
  61     LONG err;
  62
  63     /* console is never a filesystem */
  64     if (Stricmp(devicename, "CONSOLE:") == 0 || Stricmp(devicename, "*") == 0)
  65         return FALSE;
  66
  67     InitIOFS(&iofs, FSA_IS_FILESYSTEM, DOSBase);
  68     err = DoIOFS(&iofs, NULL, devicename, DOSBase);
  69
  70     /* XXX if err is ERROR_ACTION_NOT_KNOWN, we should try to lock the
  71      * root. if we can get a lock, then it's a filesystem */
  72
  73     if (err != 0)
  74         return FALSE;
  75
  76     return iofs.io_Union.io_IS_FILESYSTEM.io_IsFilesystem;
  77
  78     AROS_LIBFUNC_EXIT
  79 } /* IsFilesystem */