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
   9 #include <aros/debug.h>
  10 #include <proto/exec.h>
  11 #include <dos/dosextens.h>
  12 #include <proto/utility.h>
  13 #include "dos_intern.h"
  14 #include <string.h>
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19 #include <proto/dos.h>
  20
  21         AROS_LH1(BOOL, IsFileSystem,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(CONST_STRPTR, devicename, D1),
  25
  26 /*  LOCATION */
  27         struct DosLibrary *, DOSBase, 118, Dos)
  28
  29 /*  FUNCTION
  30         Query the device whether it is a filesystem.
  31
  32     INPUTS
  33         devicename      - Name of the device to query.
  34
  35     RESULT
  36         TRUE if the device is a filesystem, FALSE otherwise.
  37
  38     NOTES
  39         DF0:, HD0:, ... are filesystems.
  40         CON:, PIPE:, AUX:, ... are not
  41
  42         In AmigaOS if devicename contains no ":" then result
  43         is always TRUE. Also volume and assign names return
  44         TRUE.
  45
  46     EXAMPLE
  47
  48     BUGS
  49
  50     SEE ALSO
  51
  52     INTERNALS
  53
  54 *****************************************************************************/
  55 {
  56     AROS_LIBFUNC_INIT
  57
  58     LONG err = ERROR_OBJECT_NOT_FOUND;
  59     LONG code = DOSFALSE;
  60     struct DevProc *dvp = NULL;
  61
  62     /* console is never a filesystem */
  63     if (Stricmp(devicename, "CONSOLE:") == 0 || Stricmp(devicename, "*") == 0 ||
  64         Stricmp(devicename, "CON:") == 0 || Stricmp(devicename, "RAW:") == 0) {
  65         SetIoErr(err);
  66         return code;
  67     }
  68
  69     if ((dvp = GetDeviceProc(devicename, dvp))) {
  70         if (dvp->dvp_Port != NULL) // NIL: isn't a filesystem
  71             code = dopacket0(DOSBase, NULL, dvp->dvp_Port, ACTION_IS_FILESYSTEM);
  72         FreeDeviceProc(dvp);
  73     } else {
  74         SetIoErr(err);
  75     }
  76
  77     return code;
  78
  79     AROS_LIBFUNC_EXIT
  80 } /* IsFilesystem */