diff options
Diffstat (limited to 'src/VBox/Runtime/r3/posix/pathhost-posix.cpp')
| -rw-r--r-- | src/VBox/Runtime/r3/posix/pathhost-posix.cpp | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/pathhost-posix.cpp b/src/VBox/Runtime/r3/posix/pathhost-posix.cpp new file mode 100644 index 00000000..9ef518fb --- /dev/null +++ b/src/VBox/Runtime/r3/posix/pathhost-posix.cpp @@ -0,0 +1,284 @@ +/* $Id: pathhost-posix.cpp $ */ +/** @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 <iprt/env.h> +#include <iprt/err.h> +#include <iprt/string.h> +#include <iprt/once.h> + + +/********************************************************************************************************************************* +* 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; +} + |