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/* $Id: env-win.cpp $ */
/** @file
* IPRT - Environment, Posix.
*/
/*
* Copyright (C) 2006-2020 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 <iprt/env.h>
#include <iprt/alloca.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/string.h>
#include <iprt/mem.h>
#include <iprt/utf16.h>
#include <stdlib.h>
#include <errno.h>
RTDECL(bool) RTEnvExistsBad(const char *pszVar)
{
return RTEnvGetBad(pszVar) != NULL;
}
RTDECL(bool) RTEnvExist(const char *pszVar)
{
return RTEnvExistsBad(pszVar);
}
RTDECL(bool) RTEnvExistsUtf8(const char *pszVar)
{
AssertReturn(strchr(pszVar, '=') == NULL, false);
PRTUTF16 pwszVar;
int rc = RTStrToUtf16(pszVar, &pwszVar);
AssertRCReturn(rc, false);
bool fRet = _wgetenv(pwszVar) != NULL;
RTUtf16Free(pwszVar);
return fRet;
}
RTDECL(const char *) RTEnvGetBad(const char *pszVar)
{
AssertReturn(strchr(pszVar, '=') == NULL, NULL);
return getenv(pszVar);
}
RTDECL(const char *) RTEnvGet(const char *pszVar)
{
return RTEnvGetBad(pszVar);
}
RTDECL(int) RTEnvGetUtf8(const char *pszVar, char *pszValue, size_t cbValue, size_t *pcchActual)
{
AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
AssertPtrNullReturn(pszValue, VERR_INVALID_POINTER);
AssertReturn(pszValue || !cbValue, VERR_INVALID_PARAMETER);
AssertPtrNullReturn(pcchActual, VERR_INVALID_POINTER);
AssertReturn(pcchActual || (pszValue && cbValue), VERR_INVALID_PARAMETER);
AssertReturn(strchr(pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
if (pcchActual)
*pcchActual = 0;
PRTUTF16 pwszVar;
int rc = RTStrToUtf16(pszVar, &pwszVar);
AssertRCReturn(rc, rc);
/** @todo Consider _wgetenv_s or GetEnvironmentVariableW here to avoid the
* potential race with a concurrent _wputenv/_putenv. */
PCRTUTF16 pwszValue = _wgetenv(pwszVar);
RTUtf16Free(pwszVar);
if (pwszValue)
{
if (cbValue)
rc = RTUtf16ToUtf8Ex(pwszValue, RTSTR_MAX, &pszValue, cbValue, pcchActual);
else
rc = RTUtf16CalcUtf8LenEx(pwszValue, RTSTR_MAX, pcchActual);
}
else
rc = VERR_ENV_VAR_NOT_FOUND;
return rc;
}
RTDECL(int) RTEnvPutBad(const char *pszVarEqualValue)
{
/** @todo putenv is a source memory leaks. deal with this on a per system basis. */
if (!putenv((char *)pszVarEqualValue))
return 0;
return RTErrConvertFromErrno(errno);
}
RTDECL(int) RTEnvPut(const char *pszVarEqualValue)
{
return RTEnvPutBad(pszVarEqualValue);
}
RTDECL(int) RTEnvPutUtf8(const char *pszVarEqualValue)
{
PRTUTF16 pwszVarEqualValue;
int rc = RTStrToUtf16(pszVarEqualValue, &pwszVarEqualValue);
if (RT_SUCCESS(rc))
{
if (!_wputenv(pwszVarEqualValue))
rc = VINF_SUCCESS;
else
rc = RTErrConvertFromErrno(errno);
RTUtf16Free(pwszVarEqualValue);
}
return rc;
}
RTDECL(int) RTEnvSetBad(const char *pszVar, const char *pszValue)
{
AssertMsgReturn(strchr(pszVar, '=') == NULL, ("'%s'\n", pszVar), VERR_ENV_INVALID_VAR_NAME);
/* make a local copy and feed it to putenv. */
const size_t cchVar = strlen(pszVar);
const size_t cchValue = strlen(pszValue);
char *pszTmp = (char *)alloca(cchVar + cchValue + 2 + !*pszValue);
memcpy(pszTmp, pszVar, cchVar);
pszTmp[cchVar] = '=';
if (*pszValue)
memcpy(pszTmp + cchVar + 1, pszValue, cchValue + 1);
else
{
pszTmp[cchVar + 1] = ' '; /* wrong, but putenv will remove it otherwise. */
pszTmp[cchVar + 2] = '\0';
}
if (!putenv(pszTmp))
return 0;
return RTErrConvertFromErrno(errno);
}
RTDECL(int) RTEnvSet(const char *pszVar, const char *pszValue)
{
return RTEnvSetBad(pszVar, pszValue);
}
/**
* Worker common to RTEnvSetUtf8() and rtEnvSetExWorker().
*/
int rtEnvSetUtf8Worker(const char *pchVar, size_t cchVar, const char *pszValue)
{
size_t cwcVar;
int rc = RTStrCalcUtf16LenEx(pchVar, cchVar, &cwcVar);
if (RT_SUCCESS(rc))
{
size_t cwcValue;
rc = RTStrCalcUtf16LenEx(pszValue, RTSTR_MAX, &cwcValue);
if (RT_SUCCESS(rc))
{
PRTUTF16 pwszTmp = (PRTUTF16)RTMemTmpAlloc((cwcVar + 1 + cwcValue + 1) * sizeof(RTUTF16));
if (pwszTmp)
{
rc = RTStrToUtf16Ex(pchVar, cchVar, &pwszTmp, cwcVar + 1, NULL);
if (RT_SUCCESS(rc))
{
PRTUTF16 pwszTmpValue = &pwszTmp[cwcVar];
*pwszTmpValue++ = '=';
rc = RTStrToUtf16Ex(pszValue, RTSTR_MAX, &pwszTmpValue, cwcValue + 1, NULL);
if (RT_SUCCESS(rc))
{
if (!_wputenv(pwszTmp))
rc = VINF_SUCCESS;
else
rc = RTErrConvertFromErrno(errno);
}
}
RTMemTmpFree(pwszTmp);
}
else
rc = VERR_NO_TMP_MEMORY;
}
}
return rc;
}
RTDECL(int) RTEnvSetUtf8(const char *pszVar, const char *pszValue)
{
size_t cchVar = strlen(pszVar);
AssertReturn(memchr(pszVar, '=', cchVar) == NULL, VERR_ENV_INVALID_VAR_NAME);
return rtEnvSetUtf8Worker(pszVar, cchVar, pszValue);
}
RTDECL(int) RTEnvUnsetBad(const char *pszVar)
{
AssertReturn(strchr(pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
/*
* Check that it exists first.
*/
if (!RTEnvExist(pszVar))
return VINF_ENV_VAR_NOT_FOUND;
/*
* Ok, try remove it.
*/
#ifdef RT_OS_WINDOWS
/* Use putenv(var=) since Windows does not have unsetenv(). */
size_t cchVar = strlen(pszVar);
char *pszBuf = (char *)alloca(cchVar + 2);
memcpy(pszBuf, pszVar, cchVar);
pszBuf[cchVar] = '=';
pszBuf[cchVar + 1] = '\0';
if (!putenv(pszBuf))
return VINF_SUCCESS;
#else
/* This is the preferred function as putenv() like used above does neither work on Solaris nor on Darwin. */
if (!unsetenv((char*)pszVar))
return VINF_SUCCESS;
#endif
return RTErrConvertFromErrno(errno);
}
RTDECL(int) RTEnvUnset(const char *pszVar)
{
return RTEnvUnsetBad(pszVar);
}
RTDECL(int) RTEnvUnsetUtf8(const char *pszVar)
{
AssertReturn(strchr(pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
size_t cwcVar;
int rc = RTStrCalcUtf16LenEx(pszVar, RTSTR_MAX, &cwcVar);
if (RT_SUCCESS(rc))
{
PRTUTF16 pwszTmp = (PRTUTF16)RTMemTmpAlloc((cwcVar + 1 + 1) * sizeof(RTUTF16));
if (pwszTmp)
{
rc = RTStrToUtf16Ex(pszVar, RTSTR_MAX, &pwszTmp, cwcVar + 1, NULL);
if (RT_SUCCESS(rc))
{
pwszTmp[cwcVar] = '=';
pwszTmp[cwcVar + 1] = '\0';
if (!_wputenv(pwszTmp))
rc = VINF_SUCCESS;
else
rc = RTErrConvertFromErrno(errno);
}
RTMemTmpFree(pwszTmp);
}
}
return rc;
}
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