rom/dos/filesystem_support.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: English
   7 */
   8
   9 #include <dos/dos.h>
  10 #include <dos/dosextens.h>
  11 #include <dos/filesystem.h>
  12 #include <exec/memory.h>
  13 #include <proto/dos.h>
  14 #include <proto/exec.h>
  15 #include "dos_intern.h"
  16
  17 #include <string.h>
  18
  19
  20 struct Device *GetDosType(ULONG type, CONST_STRPTR name, struct Unit **unit,
  21                           struct DosLibrary *DOSBase);
  22
  23
  24 void InitIOFS(struct IOFileSys *iofs, ULONG type,
  25               struct DosLibrary *DOSBase)
  26 {
  27     struct Process *me = (struct Process *)FindTask(NULL);
  28
  29     iofs->IOFS.io_Message.mn_Node.ln_Type = NT_REPLYMSG;
  30     iofs->IOFS.io_Message.mn_ReplyPort    = &me->pr_MsgPort;
  31     iofs->IOFS.io_Message.mn_Length       = sizeof(struct IOFileSys);
  32     iofs->IOFS.io_Command                 = type;
  33     iofs->IOFS.io_Flags                   = 0;
  34 }
  35
  36 struct Device *GetDevice(CONST_STRPTR name, struct Unit **unit,
  37                          struct DosLibrary *DOSBase)
  38 {
  39     return GetDosType(LDF_DEVICES, name, unit, DOSBase);
  40 //    return GetDosType(DLT_DEVICE, name, unit, DOSBase);
  41 }
  42
  43
  44 struct Device *GetVolume(CONST_STRPTR name, struct Unit **unit,
  45                          struct DosLibrary *DOSBase)
  46 {
  47     return GetDosType(LDF_VOLUMES, name, unit, DOSBase);
  48 //    return GetDosType(DLT_VOLUME, name, unit, DOSBase);
  49 }
  50
  51
  52 /* Return the device corresponding to the 'name'. This function will
  53    only look into "real" devices, that is no "PROGDIR:" or such.
  54    The pointer to the device unit will be written into 'unit' if
  55    'unit' is not NULL. */
  56 struct Device *GetDosType(ULONG type, CONST_STRPTR name, struct Unit **unit,
  57                           struct DosLibrary *DOSBase)
  58 {
  59     int     len = strlen(name);
  60     int     size;
  61     STRPTR  colon = strchr(name, ':');
  62     STRPTR  tempName;
  63
  64     struct Device  *device = NULL;
  65     struct DosList *dl;
  66
  67     if (colon == NULL)
  68     {
  69         return NULL;
  70     }
  71
  72     size = colon - name;
  73
  74     /* Not only a device name with trailing colon? */
  75     if (size + 1 != len)
  76     {
  77         return NULL;
  78     }
  79
  80     tempName = AllocVec(len, MEMF_ANY);
  81
  82     if (tempName == NULL)
  83     {
  84         return NULL;
  85     }
  86
  87     CopyMem(name, tempName, size);
  88     tempName[size] = 0;         /* Terminate string */
  89
  90     dl = LockDosList(type | LDF_READ);
  91     dl = FindDosEntry(dl, tempName, type);
  92     if (dl != NULL)
  93     {
  94         device = dl->dol_Device;
  95         if (unit!=NULL)
  96             *unit = dl->dol_Unit;
  97     }
  98
  99     UnLockDosList(type | LDF_READ);
 100
 101     if (device == NULL)
 102     {
 103         SetIoErr(ERROR_DEVICE_NOT_MOUNTED);
 104     }
 105
 106     FreeVec(tempName);
 107
 108     return device;
 109 }