r3/win/env-win.cpp

dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync/* $Id$ */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync/** @file
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * IPRT - Environment, Posix.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync/*
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * Copyright (C) 2006-2014 Oracle Corporation
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync *
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * available from http://www.virtualbox.org. This file is free software;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * you can redistribute it and/or modify it under the terms of the GNU
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * General Public License (GPL) as published by the Free Software
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync *
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * The contents of this file may alternatively be used under the terms
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * of the Common Development and Distribution License Version 1.0
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * VirtualBox OSE distribution, in which case the provisions of the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * CDDL are applicable instead of those of the GPL.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync *
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * You may elect to license modified versions of this file under the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync * terms and conditions of either the GPL or the CDDL or both.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync/*******************************************************************************
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync*   Header Files                                                               *
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync*******************************************************************************/
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <iprt/env.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <iprt/alloca.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <iprt/assert.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <iprt/string.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <iprt/mem.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <stdlib.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#include <errno.h>
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(bool) RTEnvExistsBad(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvGetBad(pszVar) != NULL;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(bool) RTEnvExist(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvExistsBad(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(bool) RTEnvExistsUtf8(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    PRTUTF16 pwszVar;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    int rc = RTStrToUtf16(pszVar, &pwszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertRCReturn(rc, false);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    bool fRet = _wgetenv(pwszVar) != NULL;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    RTUtf16Free(pwszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return fRet;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(const char *) RTEnvGetBad(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return getenv(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(const char *) RTEnvGet(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvGetBad(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvGetUtf8(const char *pszVar, char *pszValue, size_t cbValue, size_t *pcchActual)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertPtrNullReturn(pszValue, VERR_INVALID_POINTER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertReturn(pszValue || !cbValue, VERR_INVALID_PARAMETER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertPtrNullReturn(pcchActual, VERR_INVALID_POINTER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertReturn(pcchActual || (pszValue && cbValue), VERR_INVALID_PARAMETER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (pcchActual)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        *pcchActual = 0;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    PRTUTF16 pwszVar;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    int rc = RTStrToUtf16(pszVar, &pwszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertRCReturn(rc, false);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /** @todo Consider _wgetenv_s or GetEnvironmentVariableW here to avoid the
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync     *        potential race with a concurrent _wputenv/_putenv. */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    PCRTUTF16 pwszValue = _wgetenv(pwszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    RTUtf16Free(pwszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (pwszValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        if (cbValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            rc = RTUtf16ToUtf8Ex(pwszValue, RTSTR_MAX, &pszValue, cbValue, pcchActual);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            rc = RTUtf16CalcUtf8LenEx(pwszValue, RTSTR_MAX, pcchActual);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        rc = VERR_ENV_VAR_NOT_FOUND;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return rc;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvPutBad(const char *pszVarEqualValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /** @todo putenv is a source memory leaks. deal with this on a per system basis. */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (!putenv((char *)pszVarEqualValue))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        return 0;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvPut(const char *pszVarEqualValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvPutBad(pszVarEqualValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvPutUtf8(const char *pszVarEqualValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    PRTUTF16 pwszVarEqualValue;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    int rc = RTStrToUtf16(pszVarEqualValue, &pwszVarEqualValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        if (!_wputenv(pwszVarEqualValue))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            rc = VINF_SUCCESS;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            rc = RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        RTUtf16Free(pwszVarEqualValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return rc;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvSetBad(const char *pszVar, const char *pszValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /* make a local copy and feed it to putenv. */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    const size_t cchVar = strlen(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    const size_t cchValue = strlen(pszValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    char *pszTmp = (char *)alloca(cchVar + cchValue + 2 + !*pszValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    memcpy(pszTmp, pszVar, cchVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    pszTmp[cchVar] = '=';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (*pszValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        memcpy(pszTmp + cchVar + 1, pszValue, cchValue + 1);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        pszTmp[cchVar + 1] = ' '; /* wrong, but putenv will remove it otherwise. */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        pszTmp[cchVar + 2] = '\0';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (!putenv(pszTmp))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        return 0;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvSet(const char *pszVar, const char *pszValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvSetBad(pszVar, pszValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvSetUtf8(const char *pszVar, const char *pszValue)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    size_t cwcVar;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    int rc = RTStrCalcUtf16LenEx(pszVar, RTSTR_MAX, &cwcVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        size_t cwcValue;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        rc = RTStrCalcUtf16LenEx(pszVar, RTSTR_MAX, &cwcValue);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            PRTUTF16 pwszTmp = (PRTUTF16)RTMemTmpAlloc((cwcVar + 1 + cwcValue + 1) * sizeof(RTUTF16));
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            if (pwszTmp)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                rc = RTStrToUtf16Ex(pszVar, RTSTR_MAX, &pwszTmp, cwcVar + 1, NULL);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    PRTUTF16 pwszTmpValue = &pwszTmp[cwcVar];
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    *pwszTmpValue++ = '=';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    rc = RTStrToUtf16Ex(pszValue, RTSTR_MAX, &pwszTmpValue, cwcValue + 1, NULL);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                        if (!_wputenv(pwszTmp))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                            rc = VINF_SUCCESS;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                        else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                            rc = RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                RTMemTmpFree(pwszTmp);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                rc = VERR_NO_TMP_MEMORY;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return rc;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvUnsetBad(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    AssertReturn(!strchr(pszVar, '='), VERR_INVALID_PARAMETER);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /*
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync     * Check that it exists first.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync     */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (!RTEnvExist(pszVar))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        return VINF_ENV_VAR_NOT_FOUND;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /*
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync     * Ok, try remove it.
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync     */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#ifdef RT_OS_WINDOWS
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /* Use putenv(var=) since Windows does not have unsetenv(). */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    size_t cchVar = strlen(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    char *pszBuf = (char *)alloca(cchVar + 2);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    memcpy(pszBuf, pszVar, cchVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    pszBuf[cchVar]     = '=';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    pszBuf[cchVar + 1] = '\0';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (!putenv(pszBuf))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        return VINF_SUCCESS;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    /* This is the preferred function as putenv() like used above does neither work on Solaris nor on Darwin. */
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (!unsetenv((char*)pszVar))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        return VINF_SUCCESS;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync#endif
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvUnset(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return RTEnvUnsetBad(pszVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsyncRTDECL(int) RTEnvUnsetUtf8(const char *pszVar)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync{
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    size_t cwcVar;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    int rc = RTStrCalcUtf16LenEx(pszVar, RTSTR_MAX, &cwcVar);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        PRTUTF16 pwszTmp = (PRTUTF16)RTMemTmpAlloc((cwcVar + 1 + 1) * sizeof(RTUTF16));
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        if (pwszTmp)
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            rc = RTStrToUtf16Ex(pszVar, RTSTR_MAX, &pwszTmp, cwcVar + 1, NULL);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            if (RT_SUCCESS(rc))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            {
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                pwszTmp[cwcVar] = '=';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                pwszTmp[cwcVar + 1] = '\0';
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                if (!_wputenv(pwszTmp))
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    rc = VINF_SUCCESS;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                else
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync                    rc = RTErrConvertFromErrno(errno);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync            RTMemTmpFree(pwszTmp);
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync        }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    }
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync    return rc;
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync}
dbc6ecd6a6e372b8dcdf31d68bdab2d5b5e604d2vboxsync