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     /* The Open() aliases '*' and 'CONSOLE:'
  63      * are never filesystems
  64      */
  65     if (Stricmp(devicename, "*") == 0 ||
  66         Stricmp(devicename, "CONSOLE:") == 0) {
  67         SetIoErr(err);
  68         return code;
  69     }
  70
  71     /* We can't call GetDeviceProc() on CON: nor RAW:,
  72      * since that will (implicitly) cause a window to
  73      * open.
  74      */
  75     if (Stricmp(devicename, "CON:") == 0 ||
  76         Stricmp(devicename, "RAW:") == 0) {
  77         SetIoErr(err);
  78         return code;
  79     }
  80
  81
  82     if ((dvp = GetDeviceProc(devicename, dvp))) {
  83         if (dvp->dvp_Port != NULL) // No port? Not a filesystem
  84             code = dopacket0(DOSBase, NULL, dvp->dvp_Port, ACTION_IS_FILESYSTEM);
  85         FreeDeviceProc(dvp);
  86     } else {
  87         SetIoErr(err);
  88     }
  89
  90     return code;
  91
  92     AROS_LIBFUNC_EXIT
  93 } /* IsFilesystem */