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Diffstat (limited to 'cppuhelper/source/findsofficepath.c')
| -rw-r--r-- | cppuhelper/source/findsofficepath.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/cppuhelper/source/findsofficepath.c b/cppuhelper/source/findsofficepath.c new file mode 100644 index 000000000..75d370981 --- /dev/null +++ b/cppuhelper/source/findsofficepath.c @@ -0,0 +1,219 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <sal/config.h> + +#include <stdlib.h> +#include <string.h> + +#include <cppuhelper/findsofficepath.h> + +#if defined(_WIN32) + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> + +/* + * Gets the installation path from the Windows Registry for the specified + * registry key. + * + * @param hroot open handle to predefined root registry key + * @param subKeyName name of the subkey to open + * + * @return the installation path or NULL, if no installation was found or + * if an error occurred + */ +static wchar_t* getPathFromRegistryKey( HKEY hroot, const wchar_t* subKeyName ) +{ + HKEY hkey; + DWORD type; + wchar_t* data = NULL; + DWORD size; + + /* open the specified registry key */ + if ( RegOpenKeyExW( hroot, subKeyName, 0, KEY_READ, &hkey ) != ERROR_SUCCESS ) + { + return NULL; + } + + /* find the type and size of the default value */ + if ( RegQueryValueExW( hkey, NULL, NULL, &type, NULL, &size) != ERROR_SUCCESS ) + { + RegCloseKey( hkey ); + return NULL; + } + + /* get memory to hold the default value */ + data = (wchar_t*) malloc( size + sizeof(wchar_t) ); + + /* read the default value */ + if ( RegQueryValueExW( hkey, NULL, NULL, &type, (LPBYTE) data, &size ) != ERROR_SUCCESS ) + { + RegCloseKey( hkey ); + free( data ); + return NULL; + } + + // According to https://msdn.microsoft.com/en-us/ms724911, If the data has the REG_SZ, + // REG_MULTI_SZ or REG_EXPAND_SZ type, the string may not have been stored with the + // proper terminating null characters + data[size / sizeof(wchar_t)] = 0; + + /* release registry key handle */ + RegCloseKey( hkey ); + + return data; +} + +/* + * Gets the installation path from the Windows Registry. + * + * @return the installation path or NULL, if no installation was found or + * if an error occurred + */ +static wchar_t* platformSpecific() +{ + const wchar_t* UNOPATHVARNAME = L"UNO_PATH"; + + /* get the installation path from the UNO_PATH environment variable */ + wchar_t* env = _wgetenv(UNOPATHVARNAME); + + if (env && env[0]) + { + return wcsdup(env); + } + + const wchar_t* SUBKEYNAME = L"Software\\LibreOffice\\UNO\\InstallPath"; + + /* read the key's default value from HKEY_CURRENT_USER */ + wchar_t* path = getPathFromRegistryKey( HKEY_CURRENT_USER, SUBKEYNAME ); + + if ( path == NULL ) + { + /* read the key's default value from HKEY_LOCAL_MACHINE */ + path = getPathFromRegistryKey( HKEY_LOCAL_MACHINE, SUBKEYNAME ); + } + + return path; +} + +#else + +#include <limits.h> + +/* + * Gets the installation path from the PATH environment variable. + * + * <p>An installation is found, if the executable 'soffice' or a symbolic link + * is in one of the directories listed in the PATH environment variable.</p> + * + * @return the installation path or NULL, if no installation was found or + * if an error occurred + */ +static char* platformSpecific(void) +{ + const char* UNOPATHVARNAME = "UNO_PATH"; + + /* get the installation path from the UNO_PATH environment variable */ + char* env = getenv(UNOPATHVARNAME); + + const int SEPARATOR = '/'; + const char* PATHSEPARATOR = ":"; + const char* PATHVARNAME = "PATH"; + const char* APPENDIX = "/libreoffice"; + + char* path = NULL; + char* str = NULL; + char* dir = NULL; + char* sep = NULL; + + char buffer[PATH_MAX]; + int pos; + + if (env && env[0]) + { + return strdup(env); + } + + /* get the value of the PATH environment variable */ + env = getenv( PATHVARNAME ); + if (env == NULL) + return NULL; + + str = strdup( env ); + if (str == NULL) + return NULL; + + /* get the tokens separated by ':' */ + dir = strtok( str, PATHSEPARATOR ); + + while ( dir ) + { + /* construct soffice file path */ + char* resolved = NULL; + char* file = (char*) malloc( strlen( dir ) + strlen( APPENDIX ) + 1 ); + if (file == NULL) + { + free(str); + return NULL; + } + + strcpy( file, dir ); + strcat( file, APPENDIX ); + + /* resolve symbolic link */ + resolved = realpath( file, buffer ); + if ( resolved != NULL ) + { + /* get path to program directory */ + sep = strrchr( resolved, SEPARATOR ); + + if ( sep != NULL ) + { + pos = sep - resolved; + path = (char*) malloc( pos + 1 ); + strncpy( path, resolved, pos ); + path[ pos ] = '\0'; + free( file ); + break; + } + } + + dir = strtok( NULL, PATHSEPARATOR ); + free( file ); + } + + free( str ); + + return path; +} + +#endif + +#if defined(_WIN32) +wchar_t* +#else +char* +#endif +cppuhelper_detail_findSofficePath() +{ + return platformSpecific(); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |