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/* -*- 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 char* getPathFromRegistryKey( HKEY hroot, const char* subKeyName )
{
HKEY hkey;
DWORD type;
char* data = NULL;
DWORD size;
/* open the specified registry key */
if ( RegOpenKeyEx( hroot, subKeyName, 0, KEY_READ, &hkey ) != ERROR_SUCCESS )
{
return NULL;
}
/* find the type and size of the default value */
if ( RegQueryValueEx( hkey, NULL, NULL, &type, NULL, &size) != ERROR_SUCCESS )
{
RegCloseKey( hkey );
return NULL;
}
/* get memory to hold the default value */
data = (char*) malloc( size );
/* read the default value */
if ( RegQueryValueEx( hkey, NULL, NULL, &type, (LPBYTE) data, &size ) != ERROR_SUCCESS )
{
RegCloseKey( hkey );
return NULL;
}
/* 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 char* platformSpecific()
{
const char* SUBKEYNAME = "Software\\LibreOffice\\UNO\\InstallPath";
char* path = NULL;
/* read the key's default value from HKEY_CURRENT_USER */
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 <unistd.h>
#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 int SEPARATOR = '/';
const char* PATHSEPARATOR = ":";
const char* PATHVARNAME = "PATH";
const char* APPENDIX = "/libreoffice";
char* path = NULL;
char* env = NULL;
char* str = NULL;
char* dir = NULL;
char* sep = NULL;
char buffer[PATH_MAX];
int pos;
/* 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
char const* cppuhelper_detail_findSofficePath()
{
const char* UNOPATHVARNAME = "UNO_PATH";
char* path = NULL;
/* get the installation path from the UNO_PATH environment variable */
path = getenv( UNOPATHVARNAME );
if (!path || !path[0])
path = platformSpecific();
return path;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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