RTPathAbsEx.cpp revision 077137f1c602268ce62c760701f619a2ae929923
/* $Id$ */
/** @file
* IPRT - RTPathAbsEx
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* 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 ( (pszBase[0] == '/' || pszBase[0] == '\\')
&& (pszBase[1] == '/' || pszBase[1] == '\\')
&& pszBase[2] == '?'
&& (pszBase[3] == '/' || 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 work for now - I don't have time to fix it right now.
*
* 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.
* 3) The lengths total doesn't have to be less than max length
* if the pszPath starts with a slash.
*/
size_t cchBase = strlen(pszBase);
size_t cchPath = strlen(pszPath);
if (cchBase + cchPath >= RTPATH_MAX)
return VERR_FILENAME_TOO_LONG;
bool fRootSpec = pszPath[0] == '/'
#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
|| pszPath[0] == '\\'
#endif
;
size_t cchVolSpec = rtPathVolumeSpecLen(pszBase);
char szPath[RTPATH_MAX];
if (fRootSpec)
{
/* join the disk name from base and the path */
memcpy(szPath, pszBase, cchVolSpec);
strcpy(&szPath[cchVolSpec], pszPath);
}
else
{
/* join the base path and the path */
strcpy(szPath, pszBase);
szPath[cchBase] = RTPATH_DELIMITER;
strcpy(&szPath[cchBase + 1], pszPath);
}
return RTPathAbs(szPath, pszAbsPath, cchAbsPath);
}
/* Fallback to the non *Ex version */
return RTPathAbs(pszPath, pszAbsPath, cchAbsPath);
}