rom/dos/fs_driver.c

   1 /*
   2     Copyright © 2011-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Low-level filesystem access functions, packet version
   6     Lang: English
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <dos/dos.h>
  11 #include <proto/dos.h>
  12 #include <proto/exec.h>
  13
  14 #include "dos_intern.h"
  15 #include "fs_driver.h"
  16
  17 LONG fs_LocateObject(BPTR *ret, struct MsgPort *port, BPTR parent, CONST_STRPTR name, LONG accessMode, struct DosLibrary *DOSBase)
  18 {
  19     SIPTR error = 0;
  20     BSTR bstrname = C2BSTR(name);
  21
  22     if (!bstrname)
  23         return ERROR_NO_FREE_STORE;
  24
  25     *ret = (BPTR)dopacket3(DOSBase, &error, port, ACTION_LOCATE_OBJECT, parent, bstrname, accessMode);
  26     FREEC2BSTR(bstrname);
  27
  28     return (*ret) ? 0 : error;
  29 }
  30
  31 LONG fs_Open(struct FileHandle *handle, struct MsgPort *port, BPTR lock, LONG mode, CONST_STRPTR name, struct DosLibrary *DOSBase)
  32 {
  33     ULONG action;
  34     BSTR bstrname;
  35     SIPTR error = 0;
  36     LONG status;
  37
  38     /* The MODE_* flags exactly match their corresponding ACTION_*
  39      * flags:
  40      *
  41      * MODE_READWRITE = ACTION_FINDUPDATE = 1004
  42      * MODE_OLDFILE   = ACTION_FINDINPUT  = 1005
  43      * MODE_NEWFILE   = ACTION_FINDOUTPUT = 1006
  44      *
  45      * Even so, we don't want bad data propagating
  46      * down, so check that the mode is valid.
  47      */
  48     if ((mode == MODE_READWRITE) ||
  49         (mode == MODE_OLDFILE) ||
  50         (mode == MODE_NEWFILE))
  51         action = mode;
  52     else
  53         return ERROR_NOT_IMPLEMENTED;
  54
  55     bstrname = C2BSTR(name);
  56     if (!bstrname)
  57         return ERROR_NO_FREE_STORE;
  58
  59     status = dopacket3(DOSBase, &error, port, action, MKBADDR(handle), lock, bstrname);
  60     FREEC2BSTR(bstrname);
  61
  62     handle->fh_Type = port;
  63     return status ? 0 : error;
  64 }
  65
  66 LONG fs_ReadLink(BPTR parent, struct DevProc *dvp, CONST_STRPTR path, STRPTR buffer, ULONG size, struct DosLibrary *DOSBase)
  67 {
  68     struct MsgPort *port;
  69
  70     if (parent)
  71     {
  72         struct FileLock *fl = BADDR(parent);
  73
  74         port = fl->fl_Task;
  75     }
  76     else
  77     {
  78         port   = dvp->dvp_Port;
  79         parent = dvp->dvp_Lock;
  80     }
  81
  82     return ReadLink(port, parent, path, buffer, size);
  83 }
  84
  85 LONG fs_ChangeSignal(BPTR handle, struct Process *task, struct DosLibrary *DOSBase)
  86 {
  87     SIPTR error = 0;
  88     LONG status;
  89     struct FileHandle *fh = BADDR(handle);
  90
  91     status = dopacket3(DOSBase, &error, fh->fh_Type, ACTION_CHANGE_SIGNAL, fh->fh_Arg1, (IPTR)task, (SIPTR)NULL);
  92
  93     return status ? 0 : error;
  94 }
  95
  96 LONG fs_AddNotify(struct NotifyRequest *notify, struct DevProc *dvp, BPTR lock, struct DosLibrary *DOSBase)
  97 {
  98     SIPTR err = 0;
  99     LONG status = dopacket1(DOSBase, &err, notify->nr_Handler, ACTION_ADD_NOTIFY, (SIPTR)notify);
 100
 101     return status ? 0 : err;
 102 }