/* $Id: pathhost-posix.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @file * IPRT - Path Conversions, POSIX. */ /* * 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 * *********************************************************************************************************************************/ #define LOG_GROUP RTLOGGROUP_PATH #include "internal/iprt.h" #include "internal/path.h" #include "internal/string.h" #include "internal/thread.h" #include #include #include #include /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** Initialize once object. */ static RTONCE g_OnceInitPathConv = RTONCE_INITIALIZER; /** If set, then we can pass UTF-8 thru directly. */ static bool g_fPassthruUtf8 = false; /** The UTF-8 to FS iconv cache entry. */ static RTSTRICONV g_enmUtf8ToFsIdx = RTSTRICONV_UTF8_TO_LOCALE; /** The FS to UTF-8 iconv cache entry. */ static RTSTRICONV g_enmFsToUtf8Idx = RTSTRICONV_LOCALE_TO_UTF8; /** The codeset we're using. */ static char g_szFsCodeset[32]; /** * Do a case insensitive compare where the 2nd string is known and can be case * folded when writing the code. * * @returns see strcmp. * @param pszStr1 The string to compare against pszLower and * pszUpper. * @param pszUpper The upper case edition of the 2nd string. * @param pszLower The lower case edition of the 2nd string. */ static int rtPathStrICmp(const char *pszStr1, const char *pszUpper, const char *pszLower) { Assert(strlen(pszLower) == strlen(pszUpper)); for (;;) { char ch1 = *pszStr1++; char ch2Upper = *pszUpper++; char ch2Lower = *pszLower++; if ( ch1 != ch2Upper && ch1 != ch2Lower) return ch1 < ch2Upper ? -1 : 1; if (!ch1) return 0; } } /** * Is the specified codeset something we can treat as UTF-8. * * @returns true if we can do UTF-8 passthru, false if not. * @param pszCodeset The codeset in question. */ static bool rtPathConvInitIsUtf8(const char *pszCodeset) { /* Paranoia. */ if (!pszCodeset) return false; /* * Avoid RTStrICmp at this point. */ static struct { const char *pszUpper; const char *pszLower; } const s_aUtf8Compatible[] = { /* The default locale. */ { "C" , "c" }, { "POSIX" , "posix" }, /* 7-bit ASCII. */ { "ANSI_X3.4-1968" , "ansi_x3.4-1968" }, { "ANSI_X3.4-1986" , "ansi_x3.4-1986" }, { "US-ASCII" , "us-ascii" }, { "ISO646-US" , "iso646-us" }, { "ISO_646.IRV:1991" , "iso_646.irv:1991" }, { "ISO-IR-6" , "iso-ir-6" }, { "IBM367" , "ibm367" }, /* UTF-8 */ { "UTF-8" , "utf-8" }, { "UTF8" , "utf8" }, { "ISO-10646/UTF-8" , "iso-10646/utf-8" }, { "ISO-10646/UTF8" , "iso-10646/utf8" } }; for (size_t i = 0; i < RT_ELEMENTS(s_aUtf8Compatible); i++) if (!rtPathStrICmp(pszCodeset, s_aUtf8Compatible[i].pszUpper, s_aUtf8Compatible[i].pszLower)) return true; return false; } /** * Init once for the path conversion code. * * @returns IPRT status code. * @param pvUser1 Unused. * @param pvUser2 Unused. */ static DECLCALLBACK(int32_t) rtPathConvInitOnce(void *pvUser) { /* * Read the environment variable, no mercy on misconfigs here except that * empty values are quietly ignored. (We use a temp buffer for stripping.) */ char *pszEnvValue = NULL; char szEnvValue[sizeof(g_szFsCodeset)]; int rc = RTEnvGetEx(RTENV_DEFAULT, RTPATH_CODESET_ENV_VAR, szEnvValue, sizeof(szEnvValue), NULL); if (rc != VERR_ENV_VAR_NOT_FOUND && RT_FAILURE(rc)) return rc; if (RT_SUCCESS(rc)) pszEnvValue = RTStrStrip(szEnvValue); if (pszEnvValue && *pszEnvValue) { g_fPassthruUtf8 = rtPathConvInitIsUtf8(pszEnvValue); g_enmFsToUtf8Idx = RTSTRICONV_FS_TO_UTF8; g_enmUtf8ToFsIdx = RTSTRICONV_UTF8_TO_FS; strcpy(g_szFsCodeset, pszEnvValue); } else { const char *pszCodeset = rtStrGetLocaleCodeset(); size_t cchCodeset = pszCodeset ? strlen(pszCodeset) : sizeof(g_szFsCodeset); if (cchCodeset >= sizeof(g_szFsCodeset)) /* This shouldn't happen, but we'll manage. */ g_szFsCodeset[0] = '\0'; else { memcpy(g_szFsCodeset, pszCodeset, cchCodeset + 1); pszCodeset = g_szFsCodeset; } g_fPassthruUtf8 = rtPathConvInitIsUtf8(pszCodeset); g_enmFsToUtf8Idx = RTSTRICONV_LOCALE_TO_UTF8; g_enmUtf8ToFsIdx = RTSTRICONV_UTF8_TO_LOCALE; } NOREF(pvUser); return VINF_SUCCESS; } int rtPathToNative(char const **ppszNativePath, const char *pszPath, const char *pszBasePath) { *ppszNativePath = NULL; int rc = RTOnce(&g_OnceInitPathConv, rtPathConvInitOnce, NULL); if (RT_SUCCESS(rc)) { if (g_fPassthruUtf8 || !*pszPath) *ppszNativePath = pszPath; else rc = rtStrConvert(pszPath, strlen(pszPath), "UTF-8", (char **)ppszNativePath, 0, g_szFsCodeset, 2, g_enmUtf8ToFsIdx); } NOREF(pszBasePath); /* We don't query the FS for codeset preferences. */ return rc; } void rtPathFreeNative(char const *pszNativePath, const char *pszPath) { if ( pszNativePath != pszPath && pszNativePath) RTStrFree((char *)pszNativePath); } int rtPathFromNative(const char **ppszPath, const char *pszNativePath, const char *pszBasePath) { *ppszPath = NULL; int rc = RTOnce(&g_OnceInitPathConv, rtPathConvInitOnce, NULL); if (RT_SUCCESS(rc)) { if (g_fPassthruUtf8 || !*pszNativePath) { size_t cCpsIgnored; size_t cchNativePath; rc = rtUtf8Length(pszNativePath, RTSTR_MAX, &cCpsIgnored, &cchNativePath); if (RT_SUCCESS(rc)) { char *pszPath; *ppszPath = pszPath = RTStrAlloc(cchNativePath + 1); if (pszPath) memcpy(pszPath, pszNativePath, cchNativePath + 1); else rc = VERR_NO_STR_MEMORY; } } else rc = rtStrConvert(pszNativePath, strlen(pszNativePath), g_szFsCodeset, (char **)ppszPath, 0, "UTF-8", 2, g_enmFsToUtf8Idx); } NOREF(pszBasePath); /* We don't query the FS for codeset preferences. */ return rc; } void rtPathFreeIprt(const char *pszPath, const char *pszNativePath) { if ( pszPath != pszNativePath && pszPath) RTStrFree((char *)pszPath); } int rtPathFromNativeCopy(char *pszPath, size_t cbPath, const char *pszNativePath, const char *pszBasePath) { int rc = RTOnce(&g_OnceInitPathConv, rtPathConvInitOnce, NULL); if (RT_SUCCESS(rc)) { if (g_fPassthruUtf8 || !*pszNativePath) rc = RTStrCopy(pszPath, cbPath, pszNativePath); else if (cbPath) rc = rtStrConvert(pszNativePath, strlen(pszNativePath), g_szFsCodeset, &pszPath, cbPath, "UTF-8", 2, g_enmFsToUtf8Idx); else rc = VERR_BUFFER_OVERFLOW; } NOREF(pszBasePath); /* We don't query the FS for codeset preferences. */ return rc; } int rtPathFromNativeDup(char **ppszPath, const char *pszNativePath, const char *pszBasePath) { int rc = RTOnce(&g_OnceInitPathConv, rtPathConvInitOnce, NULL); if (RT_SUCCESS(rc)) { if (g_fPassthruUtf8 || !*pszNativePath) rc = RTStrDupEx(ppszPath, pszNativePath); else rc = rtStrConvert(pszNativePath, strlen(pszNativePath), g_szFsCodeset, ppszPath, 0, "UTF-8", 2, g_enmFsToUtf8Idx); } NOREF(pszBasePath); /* We don't query the FS for codeset preferences. */ return rc; }