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/* $Id: RTPathAbsEx.cpp $ */
/** @file
* IPRT - RTPathAbsEx
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/path.h>
#include <iprt/err.h>
#include <iprt/param.h>
#include <iprt/string.h>
#include "internal/path.h"
/**
* Get the absolute path (no symlinks, no . or .. components), assuming the
* given base path as the current directory. The resulting path doesn't have
* to exist.
*
* @returns iprt status code.
* @param pszBase The base path to act like a current directory.
* When NULL, the actual cwd is used (i.e. the call
* is equivalent to RTPathAbs(pszPath, ...).
* @param pszPath The path to resolve.
* @param pszAbsPath Where to store the absolute path.
* @param cchAbsPath Size of the buffer.
*/
RTDECL(int) RTPathAbsEx(const char *pszBase, const char *pszPath, char *pszAbsPath, size_t cchAbsPath)
{
if ( pszBase
&& pszPath
&& !rtPathVolumeSpecLen(pszPath)
)
{
#if defined(RT_OS_WINDOWS)
/* The format for very long paths is not supported. */
if ( RTPATH_IS_SLASH(pszBase[0])
&& RTPATH_IS_SLASH(pszBase[1])
&& pszBase[2] == '?'
&& RTPATH_IS_SLASH(pszBase[3])
)
return VERR_INVALID_NAME;
#endif
/** @todo there are a couple of things which isn't 100% correct, although the
* current code will have to do for now, no time to fix.
*
* 1) On Windows & OS/2 we confuse '/' with an abspath spec and will
* not necessarily resolve it on the right drive.
* 2) A trailing slash in the base might cause UNC names to be created.
*/
size_t const cchPath = strlen(pszPath);
char szTmpPath[RTPATH_MAX];
if (RTPATH_IS_SLASH(pszPath[0]))
{
/* join the disk name from base and the path (DOS systems only) */
size_t const cchVolSpec = rtPathVolumeSpecLen(pszBase);
if (cchVolSpec + cchPath + 1 > sizeof(szTmpPath))
return VERR_FILENAME_TOO_LONG;
memcpy(szTmpPath, pszBase, cchVolSpec);
memcpy(&szTmpPath[cchVolSpec], pszPath, cchPath + 1);
}
else
{
/* join the base path and the path */
size_t const cchBase = strlen(pszBase);
if (cchBase + 1 + cchPath + 1 > sizeof(szTmpPath))
return VERR_FILENAME_TOO_LONG;
memcpy(szTmpPath, pszBase, cchBase);
szTmpPath[cchBase] = RTPATH_DELIMITER;
memcpy(&szTmpPath[cchBase + 1], pszPath, cchPath + 1);
}
return RTPathAbs(szTmpPath, pszAbsPath, cchAbsPath);
}
/* Fallback to the non *Ex version */
return RTPathAbs(pszPath, pszAbsPath, cchAbsPath);
}
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