posix/include/psx/pdata.h

   1 /* $Id: pdata.h,v 1.3 2002/03/07 05:48:35 hyperion Exp $
   2  */
   3 /*
   4  * psx/pdata.h
   5  *
   6  * POSIX+ subsystem process environment data structure
   7  *
   8  * This file is part of the ReactOS Operating System.
   9  *
  10  * Contributors:
  11  *  Created by KJK::Hyperion <noog@libero.it>
  12  *
  13  *  THIS SOFTWARE IS NOT COPYRIGHTED
  14  *
  15  *  This source code is offered for use in the public domain. You may
  16  *  use, modify or distribute it freely.
  17  *
  18  *  This code is distributed in the hope that it will be useful but
  19  *  WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
  20  *  DISCLAMED. This includes but is not limited to warranties of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22  *
  23  */
  24 #ifndef __PSX_PDATA_H_INCLUDED__
  25 #define __PSX_PDATA_H_INCLUDED__
  26
  27 /* INCLUDES */
  28 #include <ddk/ntddk.h>
  29 #include <ntdll/rtl.h>
  30 #include <limits.h>
  31 #include <psx/fdtable.h>
  32
  33 /* OBJECTS */
  34
  35 /* TYPES */
  36 typedef struct __tagPDX_PDATA
  37 {
  38  BOOL            Spawned;          /* TRUE if process has been created through __PdxSpawnPosixProcess() */
  39  int             ArgCount;         /* count of arguments passed to exec() */
  40  char          **ArgVect;          /* array of arguments passed to exesc() */
  41  char         ***Environment;      /* pointer to user-provided environ variable */
  42  UNICODE_STRING  NativePathBuffer; /* static buffer used by low-level calls for pathname conversions */
  43  UNICODE_STRING  CurDir;           /* current working directory */
  44  UNICODE_STRING  RootPath;         /* NT path to the process's root directory */
  45  HANDLE          RootHandle;       /* handle to the process's root directory */
  46  __fdtable_t     FdTable;          /* file descriptors table */
  47 } __PDX_PDATA, * __PPDX_PDATA;
  48
  49 /* serialized process data block, used by __PdxSpawnPosixProcess() and __PdxExecThunk().
  50    The layout of buffers inside the Buffer byte array is as following:
  51
  52    ArgVect[0] + null byte
  53    ArgVect[1] + null byte
  54    ...
  55    ArgVect[ArgCount - 1] + null byte
  56    Environment[0] + null byte
  57    Environment[1] + null byte
  58    ...
  59    Environment[n - 1] + null byte (NOTE: the value of n is stored in ProcessData.Environment)
  60    CurDir.Buffer
  61    RootPath.Buffer
  62    FdTable.Descriptors[0]
  63    FdTable.Descriptors[1]
  64    ...
  65    FdTable.Descriptors[FdTable.AllocatedDescriptors - 1]
  66    FdTable.Descriptors[x].ExtraData
  67    FdTable.Descriptors[y].ExtraData
  68    ...
  69    padding for page boundary alignment
  70  */
  71 typedef struct __tagPDX_SERIALIZED_PDATA
  72 {
  73  __PDX_PDATA ProcessData;
  74  ULONG       AllocSize;
  75  BYTE        Buffer[1];
  76 } __PDX_SERIALIZED_PDATA, *__PPDX_SERIALIZED_PDATA;
  77
  78 /* CONSTANTS */
  79
  80 /* PROTOTYPES */
  81
  82 /* MACROS */
  83 #define __PdxAcquirePdataLock() (RtlAcquirePebLock())
  84 #define __PdxReleasePdataLock() (RtlReleasePebLock())
  85
  86 #define __PdxSetProcessData()(PPDATA) ((void)((NtCurrentPeb()->SubSystemData) = (PPDATA)))
  87 #define __PdxGetProcessData()         ((__PPDX_PDATA)(&(NtCurrentPeb()->SubSystemData)))
  88
  89 #define __PdxGetNativePathBuffer() ((PUNICODE_STRING)(&(__PdxGetProcessData()->NativePathBuffer)))
  90 #define __PdxGetCurDir()           ((PUNICODE_STRING)(&(__PdxGetProcessData()->CurDir)))
  91 #define __PdxGetRootPath()         ((PUNICODE_STRING)(&(__PdxGetProcessData()->RootPath)))
  92 #define __PdxGetRootHandle()       ((HANDLE)(__PdxGetProcessData()->RootHandle))
  93 #define __PdxGetFdTable()          ((__fdtable_t *)(__PdxGetProcessData()->FdTable))
  94
  95 #define __PdxSetNativePathBuffer(BUF)  ((void)((__PdxGetProcessData()->NativePathBuffer) = (BUF)))
  96 #define __PdxSetCurDir(CURDIR)         ((void)((__PdxGetProcessData()->CurDir) = (CURDIR)))
  97 #define __PdxSetRootPath(ROOTPATH)     ((void)((__PdxGetProcessData()->RootPath) = (ROOTPATH)))
  98 #define __PdxSetRootHandle(ROOTHANDLE) ((void)((__PdxGetProcessData()->RootHandle) = (ROOTHANDLE)))
  99 #define __PdxSetFdTable(FDTABLE)       ((void)((__PdxGetProcessData()->FdTable) = (FDTABLE)))
 100
 101 #endif /* __PSX_PDATA_H_INCLUDED__ */
 102
 103 /* EOF */
 104