rtPathOpenPathFh.cpp revision aa3a3139e2c5edb3469513f5b07cdd39fc89a053
/* $Id$ */
/** @file
* IPRT - rtPathOpenFd.cpp
*/
/*
* Copyright (C) 2011 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 <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include "internal/iprt.h"
#include "internal/path.h"
#include <iprt/err.h>
#include <iprt/path.h>
#include <iprt/string.h>
DECLHIDDEN(int) rtPathOpenPathNoFollowFh(const char *pszPath, int *pFh, const char **ppszName)
{
#if defined(RT_OS_LINUX) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
const char *psz = pszPath;
const char *pszName = pszPath;
int fh = -1;
AssertPtrReturn(pFh, VERR_INVALID_PARAMETER);
AssertPtrReturn(pszPath, VERR_INVALID_PARAMETER);
/* must be an absolute path */
AssertReturn(*pszPath == '/', VERR_INVALID_PARAMETER);
for (;; psz++)
{
switch (*psz)
{
/* handle separators. */
case '/':
{
int fhNew;
if (fh == -1)
{
/* root directory */
fhNew = open("/", O_RDONLY | O_NOFOLLOW);
}
else
{
/* subdirectory */
char szTmpPath[RTPATH_MAX + 1];
RTStrCopyEx(szTmpPath, sizeof(szTmpPath), pszName, psz - pszName);
fhNew = openat(fh, szTmpPath, O_RDONLY | O_NOFOLLOW);
close(fh);
}
if (fhNew < 0)
return RTErrConvertFromErrno(errno);
fh = fhNew;
pszName = psz + 1;
break;
}
/*
* The end. Complete the results.
*/
case '\0':
{
if (ppszName)
*ppszName = *pszName != '\0' ? pszName : NULL;
*pFh = fh;
return VINF_SUCCESS;
}
}
}
/* will never get here */
return 0;
#else
return VERR_NOT_IMPLEMENTED;
#endif
}