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420 lines
10 KiB
C
420 lines
10 KiB
C
/* $Id: pdata.c,v 1.1 2002/03/10 17:04:07 hyperion Exp $
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*/
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS POSIX+ Subsystem
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* FILE: subsys/psx/lib/psxdll/misc/pdata.c
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* PURPOSE: Process data management
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* PROGRAMMER: KJK::Hyperion <noog@libero.it>
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* UPDATE HISTORY:
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* 06/03/2002: Created
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* 07/03/2002: Added __PdxUnserializeProcessData() (KJK::Hyperion
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* <noog@libero.it>)
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*/
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#include <ddk/ntddk.h>
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#include <string.h>
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#include <psx/fdtable.h>
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#include <psx/pdata.h>
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#include <psx/stdlib.h>
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#include <psx/debug.h>
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/* serialize a process data block in a contiguous, page-aligned block, suitable
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for transfer across processes */
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NTSTATUS
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STDCALL
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__PdxSerializeProcessData
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(
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IN __PPDX_PDATA ProcessData,
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OUT __PPDX_SERIALIZED_PDATA *SerializedProcessData
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)
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{
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__PPDX_SERIALIZED_PDATA pspdProcessData = 0;
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NTSTATUS nErrCode;
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PBYTE pBufferTail;
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ULONG ulAllocSize = sizeof(__PDX_SERIALIZED_PDATA) - 1;
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size_t *pnArgLengths;
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size_t *pnEnvVarsLengths;
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int nEnvVarsCount;
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int i;
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/* calculate buffer length */
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/* FIXME please! this is the most inefficient way to do it */
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/* argv */
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pnArgLengths = __malloc(ProcessData->ArgCount * sizeof(size_t));
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for(i = 0; i < ProcessData->ArgCount; i ++)
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{
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int nStrLen = strlen(ProcessData->ArgVect[i]) + 1;
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ulAllocSize += nStrLen;
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pnArgLengths[i] = nStrLen;
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INFO
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(
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"argument %d: \"%s\", length %d\n",
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i,
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ProcessData->ArgVect[i],
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nStrLen
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);
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}
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/* environ */
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pnEnvVarsLengths = 0;
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nEnvVarsCount = 0;
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for(i = 0; *(ProcessData->Environment)[i] != 0; i++)
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{
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int nStrLen = strlen(*(ProcessData->Environment)[i]) + 1;
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ulAllocSize += nStrLen;
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nEnvVarsCount ++;
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__realloc(pnEnvVarsLengths, nEnvVarsCount * sizeof(size_t));
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pnEnvVarsLengths[i] = nStrLen;
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INFO
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(
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"environment variable %d: \"%s\", length %d\n",
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i,
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*(ProcessData->Environment)[i],
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nStrLen
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);
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}
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INFO("(%d environment variables were found)\n", nEnvVarsCount);
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/* current directory */
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ulAllocSize += ProcessData->CurDir.Length;
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INFO
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(
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"current directory: \"%Z\", length %d\n",
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&ProcessData->CurDir,
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ProcessData->CurDir.Length
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);
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/* root directory */
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ulAllocSize += ProcessData->RootPath.Length;
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INFO
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(
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"root directory: \"%Z\", length %d\n",
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&ProcessData->RootPath,
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ProcessData->RootPath.Length
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);
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/* file descriptors table */
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ulAllocSize += sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors;
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INFO
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(
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"descriptors table contains %d allocated descriptors, combined length %d\n",
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ProcessData->FdTable.AllocatedDescriptors,
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sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors
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);
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/* extra descriptors data */
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for(i = 0; ProcessData->FdTable.AllocatedDescriptors; i ++)
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if(ProcessData->FdTable.Descriptors[i].ExtraData != NULL)
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{
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ulAllocSize += ProcessData->FdTable.Descriptors[i].ExtraDataSize;
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INFO
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(
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"descriptor %d has %d bytes of associated data\n",
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i,
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ProcessData->FdTable.Descriptors[i].ExtraDataSize
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);
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}
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/* allocate return block */
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INFO("about to allocate %d bytes\n", ulAllocSize);
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nErrCode = NtAllocateVirtualMemory
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(
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NtCurrentProcess(),
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(PVOID *)&pspdProcessData,
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0,
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&ulAllocSize,
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MEM_COMMIT,
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PAGE_READWRITE
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);
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/* failure */
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if(!NT_SUCCESS(nErrCode))
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{
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ERR("NtAllocateVirtualMemory() failed with status 0x%08X\n", nErrCode);
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__free(pnArgLengths);
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__free(pnEnvVarsLengths);
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*SerializedProcessData = 0;
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return;
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}
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INFO("%d bytes actually allocated\n", ulAllocSize);
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pspdProcessData->AllocSize = ulAllocSize;
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/* copy data */
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/* static data */
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memcpy(&pspdProcessData->ProcessData, ProcessData, sizeof(__PDX_PDATA));
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/* buffers */
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pBufferTail = &pspdProcessData->Buffer[0];
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INFO("buffer tail begins at 0x%08X\n", pBufferTail);
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/* argv */
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pspdProcessData->ProcessData.ArgVect = 0;
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for(i = 0; i < ProcessData->ArgCount; i ++)
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{
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INFO
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(
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"copying %d bytes of argument %d (\"%s\") to 0x%08X\n",
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pnArgLengths[i],
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i,
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ProcessData->ArgVect[i],
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pBufferTail
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);
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strncpy(pBufferTail, ProcessData->ArgVect[i], pnArgLengths[i]);
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pBufferTail += pnArgLengths[i];
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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pnArgLengths[i],
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pBufferTail
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);
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}
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__free(pnArgLengths);
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/* environ */
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pspdProcessData->ProcessData.Environment = (char ***)nEnvVarsCount;
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for(i = 0; i < nEnvVarsCount; i ++)
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{
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INFO
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(
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"copying %d bytes of environment variable %d (\"%s\") to 0x%08X\n",
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pnEnvVarsLengths[i],
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i,
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ProcessData->Environment[i],
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pBufferTail
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);
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strncpy(pBufferTail, *ProcessData->Environment[i], pnEnvVarsLengths[i]);
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pBufferTail += pnEnvVarsLengths[i];
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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pnEnvVarsLengths[i],
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pBufferTail
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);
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}
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__free(pnEnvVarsLengths);
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/* current directory */
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INFO
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(
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"copying %d bytes of current directory (\"%Z\") to 0x%08X\n",
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ProcessData->CurDir.Length,
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&ProcessData->CurDir,
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pBufferTail
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);
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memcpy(pBufferTail, ProcessData->CurDir.Buffer, ProcessData->CurDir.Length);
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pBufferTail += ProcessData->CurDir.Length;
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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ProcessData->CurDir.Length,
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pBufferTail
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);
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/* root directory */
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INFO
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(
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"copying %d bytes of root directory (\"%Z\") to 0x%08X\n",
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ProcessData->RootPath.Length,
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&ProcessData->RootPath,
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pBufferTail
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);
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memcpy
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(
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pBufferTail,
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ProcessData->RootPath.Buffer,
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ProcessData->RootPath.Length
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);
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pBufferTail += ProcessData->RootPath.Length;
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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ProcessData->RootPath.Length,
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pBufferTail
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);
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/* file descriptors table */
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/* save the offset to the descriptors array */
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pspdProcessData->ProcessData.FdTable.Descriptors =
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(PVOID)((ULONG)pBufferTail - (ULONG)pspdProcessData);
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INFO
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(
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"descriptors table contains %d allocated descriptors, combined length %d\n",
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ProcessData->FdTable.AllocatedDescriptors,
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sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors
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);
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memcpy
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(
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pBufferTail,
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ProcessData->FdTable.Descriptors,
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sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors
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);
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pBufferTail +=
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sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors;
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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sizeof(__fildes_t) * ProcessData->FdTable.AllocatedDescriptors,
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pBufferTail
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);
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/* extra descriptors data */
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for(i = 0; ProcessData->FdTable.AllocatedDescriptors; i ++)
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if(ProcessData->FdTable.Descriptors[i].ExtraData != 0)
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{
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INFO
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(
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"descriptor %d has %d bytes of associated data\n",
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i,
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ProcessData->FdTable.Descriptors[i].ExtraDataSize
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);
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memcpy
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(
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pBufferTail,
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ProcessData->FdTable.Descriptors[i].ExtraData,
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ProcessData->FdTable.Descriptors[i].ExtraDataSize
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);
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pBufferTail += ProcessData->FdTable.Descriptors[i].ExtraDataSize;
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INFO
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(
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"buffer tail increased by %d bytes, new tail at 0x%08X\n",
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ProcessData->FdTable.Descriptors[i].ExtraDataSize,
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pBufferTail
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);
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}
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/* success */
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*SerializedProcessData = pspdProcessData;
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}
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/* unserialize a process data block. Dynamic data will be moved into the default
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heap */
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NTSTATUS
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STDCALL
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__PdxUnserializeProcessData
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(
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IN OUT __PPDX_SERIALIZED_PDATA *SerializedProcessData,
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OUT __PPDX_PDATA *ProcessData OPTIONAL
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)
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{
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int i;
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int nEnvVarsCount;
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__PPDX_PDATA ppdReturnBlock;
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BOOLEAN bInPlace;
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PBYTE pBufferTail;
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/* no return buffer */
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if(NULL == ProcessData)
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{
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/* perform an in-place conversion */
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ppdReturnBlock = &((*SerializedProcessData)->ProcessData);
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bInPlace = TRUE;
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}
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else
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{
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/* use the provided return buffer */
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ppdReturnBlock = *ProcessData;
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bInPlace = FALSE;
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}
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/* non in-place conversion: copy static data */
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if(!bInPlace)
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{
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memcpy(ppdReturnBlock, *SerializedProcessData, sizeof(*ppdReturnBlock));
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}
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pBufferTail = &((*SerializedProcessData)->Buffer[0]);
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/* allocate arguments array */
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ppdReturnBlock->ArgVect = __malloc(ppdReturnBlock->ArgCount * sizeof(char *));
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/* duplicate arguments */
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for(i = 0; i < ppdReturnBlock->ArgCount; i ++)
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{
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int nStrLen = strlen(pBufferTail) + 1;
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ppdReturnBlock->ArgVect[i] = __malloc(nStrLen);
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strncpy(ppdReturnBlock->ArgVect[i], pBufferTail, nStrLen);
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pBufferTail += nStrLen;
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}
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/* allocate environment array */
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nEnvVarsCount = ppdReturnBlock->Environment;
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ppdReturnBlock->Environment = __malloc(nEnvVarsCount * sizeof(char *));
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/* duplicate environment */
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for(i = 0; i < nEnvVarsCount; i ++)
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{
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int nStrLen = strlen(pBufferTail) + 1;
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ppdReturnBlock->Environment[i] = __malloc(nStrLen);
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strncpy(ppdReturnBlock->Environment[i], pBufferTail, nStrLen);
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pBufferTail += nStrLen;
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}
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/* static buffer for path conversions */
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ppdReturnBlock->NativePathBuffer.Buffer = __malloc(0xFFFF);
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ppdReturnBlock->NativePathBuffer.Length = 0;
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ppdReturnBlock->NativePathBuffer.MaximumLength = 0xFFFF;
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/* current directory */
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ppdReturnBlock->CurDir.Buffer = __malloc(ppdReturnBlock->CurDir.Length);
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ppdReturnBlock->CurDir.MaximumLength = ppdReturnBlock->CurDir.Length;
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memcpy(ppdReturnBlock->CurDir.Buffer, pBufferTail, ppdReturnBlock->CurDir.Length);
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pBufferTail += ppdReturnBlock->CurDir.Length;
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/* root directory */
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ppdReturnBlock->RootPath.Buffer = __malloc(ppdReturnBlock->RootPath.Length);
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ppdReturnBlock->RootPath.MaximumLength = ppdReturnBlock->RootPath.Length;
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memcpy(ppdReturnBlock->RootPath.Buffer, pBufferTail, ppdReturnBlock->RootPath.Length);
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pBufferTail += ppdReturnBlock->RootPath.Length;
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/* file descriptors table */
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ppdReturnBlock->FdTable.Descriptors = __malloc(ppdReturnBlock->FdTable.AllocatedDescriptors * sizeof(__fildes_t));
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memcpy(ppdReturnBlock->FdTable.Descriptors, pBufferTail, ppdReturnBlock->FdTable.AllocatedDescriptors * sizeof(__fildes_t));
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pBufferTail += ppdReturnBlock->FdTable.AllocatedDescriptors * sizeof(__fildes_t);
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for(i = 0; i < ppdReturnBlock->FdTable.AllocatedDescriptors; i ++)
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{
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if(ppdReturnBlock->FdTable.Descriptors[i].ExtraData != 0)
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{
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ppdReturnBlock->FdTable.Descriptors[i].ExtraData = __malloc(ppdReturnBlock->FdTable.Descriptors[i].ExtraDataSize);
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memcpy(ppdReturnBlock->FdTable.Descriptors[i].ExtraData, pBufferTail, ppdReturnBlock->FdTable.Descriptors[i].ExtraDataSize);
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pBufferTail += ppdReturnBlock->FdTable.Descriptors[i].ExtraDataSize;
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}
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}
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}
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/* EOF */
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