/************************************************************** * * 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 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. * *************************************************************/ // MARKER(update_precomp.py): autogen include statement, do not remove #include "precompiled_desktop.hxx" #include #include #ifdef WNT #include #include #include #endif #include #include #include #include #include #include #include #include "lockfile.hxx" using namespace ::osl; using namespace ::rtl; using namespace ::utl; namespace desktop { // initialize static members... // lock suffix const OUString Lockfile::Suffix() { return OUString::createFromAscii( "/.lock" ); } // values for datafile const ByteString Lockfile::Group() { return ByteString( "Lockdata" ); } const ByteString Lockfile::Userkey() { return ByteString( "User" ); } const ByteString Lockfile::Hostkey() { return ByteString( "Host" ); } const ByteString Lockfile::Stampkey() { return ByteString( "Stamp" ); } const ByteString Lockfile::Timekey() { return ByteString( "Time" ); } const ByteString Lockfile::IPCkey() { return ByteString( "IPCServer" ); } Lockfile::Lockfile( bool bIPCserver ) :m_bIPCserver(bIPCserver) ,m_bRemove(sal_False) ,m_bIsLocked(sal_False) { // build the file-url to use for the lock OUString aUserPath; utl::Bootstrap::locateUserInstallation( aUserPath ); m_aLockname = aUserPath + Suffix(); // generate ID const int nIdBytes = 16; char tmpId[nIdBytes*2+1]; time_t t; srand( (unsigned)(t = time( NULL )) ); int tmpByte = 0; for (int i = 0; i 0) m_aDate = m_aDate.copy(0, i); } // try to create file File aFile(m_aLockname); if (aFile.open( OpenFlag_Create ) == File::E_EXIST) { m_bIsLocked = sal_True; } else { // new lock created aFile.close( ); syncToFile( ); m_bRemove = sal_True; } } sal_Bool Lockfile::check( fpExecWarning execWarning ) { if (m_bIsLocked) { // lock existed, ask user what to do if (isStale() || (execWarning != 0 && (*execWarning)( this ))) { // remove file and create new File::remove( m_aLockname ); File aFile(m_aLockname); aFile.open( OpenFlag_Create ); aFile.close( ); syncToFile( ); m_bRemove = sal_True; return sal_True; } else { //leave alone and return false m_bRemove = sal_False; return sal_False; } } else { // lock was created by us return sal_True; } } sal_Bool Lockfile::isStale( void ) const { // this checks whether the lockfile was created on the same // host by the same user. Should this be the case it is safe // to assume that it is a stale lockfile which can be overwritten String aLockname = m_aLockname; Config aConfig(aLockname); aConfig.SetGroup(Group()); ByteString aIPCserver = aConfig.ReadKey( IPCkey() ); if (! aIPCserver.EqualsIgnoreCaseAscii( "true" )) return false; ByteString aHost = aConfig.ReadKey( Hostkey() ); ByteString aUser = aConfig.ReadKey( Userkey() ); // lockfile from same host? ByteString myHost; #ifdef WNT /* prevent windows from connecting to the net to get it's own hostname by using the netbios name */ sal_Int32 sz = MAX_COMPUTERNAME_LENGTH + 1; char* szHost = new char[sz]; if (GetComputerName(szHost, (LPDWORD)&sz)) myHost = OString(szHost); else myHost = OString("UNKNOWN"); delete[] szHost; #else oslSocketResult sRes; myHost = OUStringToOString( SocketAddr::getLocalHostname( &sRes ), RTL_TEXTENCODING_ASCII_US ); #endif if (aHost == myHost) { // lockfile by same UID OUString myUserName; Security aSecurity; aSecurity.getUserName( myUserName ); ByteString myUser = OUStringToOString( myUserName, RTL_TEXTENCODING_ASCII_US ); if (aUser == myUser) return sal_True; } return sal_False; } void Lockfile::syncToFile( void ) const { String aLockname = m_aLockname; Config aConfig(aLockname); aConfig.SetGroup(Group()); // get information ByteString aHost; #ifdef WNT /* prevent windows from connecting to the net to get it's own hostname by using the netbios name */ sal_Int32 sz = MAX_COMPUTERNAME_LENGTH + 1; char* szHost = new char[sz]; if (GetComputerName(szHost, (LPDWORD)&sz)) aHost = OString(szHost); else aHost = OString("UNKNOWN"); delete[] szHost; #else oslSocketResult sRes; aHost = OUStringToOString( SocketAddr::getLocalHostname( &sRes ), RTL_TEXTENCODING_ASCII_US ); #endif OUString aUserName; Security aSecurity; aSecurity.getUserName( aUserName ); ByteString aUser = OUStringToOString( aUserName, RTL_TEXTENCODING_ASCII_US ); ByteString aTime = OUStringToOString( m_aDate, RTL_TEXTENCODING_ASCII_US ); ByteString aStamp = OUStringToOString( m_aId, RTL_TEXTENCODING_ASCII_US ); // write information aConfig.WriteKey( Userkey(), aUser ); aConfig.WriteKey( Hostkey(), aHost ); aConfig.WriteKey( Stampkey(), aStamp ); aConfig.WriteKey( Timekey(), aTime ); aConfig.WriteKey( IPCkey(), m_bIPCserver ? ByteString("true") : ByteString("false") ); aConfig.Flush( ); } void Lockfile::clean( void ) { if ( m_bRemove ) { File::remove( m_aLockname ); m_bRemove = sal_False; } } Lockfile::~Lockfile( void ) { // unlock userdata by removing file if ( m_bRemove ) File::remove( m_aLockname ); } }