diff options
Diffstat (limited to 'desktop/source/app/lockfile.cxx')
| -rw-r--r-- | desktop/source/app/lockfile.cxx | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/desktop/source/app/lockfile.cxx b/desktop/source/app/lockfile.cxx new file mode 100644 index 000000000000..72632bdb5e27 --- /dev/null +++ b/desktop/source/app/lockfile.cxx @@ -0,0 +1,238 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_desktop.hxx" +#include <stdlib.h> +#include <time.h> +#ifndef WNT +#include <unistd.h> +#else +#include <windows.h> +#endif +#include <sal/types.h> +#include <osl/file.hxx> +#include <osl/socket.hxx> +#include <osl/security.hxx> +#include <unotools/bootstrap.hxx> +#include <tools/string.hxx> +#include <tools/config.hxx> + +#include "lockfile.hxx" + + +using namespace ::osl; +using namespace ::rtl; +using namespace ::utl; + + +static rtl::OString impl_getHostname() +{ + rtl::OString 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 + /* Don't do dns lookup on Linux either */ + sal_Char pHostName[1024]; + + if ( gethostname( pHostName, sizeof( pHostName ) - 1 ) == 0 ) + { + pHostName[sizeof( pHostName ) - 1] = '\0'; + aHost = OString( pHostName ); + } + else + aHost = OString("UNKNOWN"); +#endif + + return aHost; +} + +namespace desktop { + + 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 + LOCKFILE_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<nIdBytes; i++) { + tmpByte = rand( ) % 0xFF; + sprintf( tmpId+i*2, "%02X", tmpByte ); + } + tmpId[nIdBytes*2]=0x00; + m_aId = OUString::createFromAscii( tmpId ); + + // generate date string + char *tmpTime = ctime( &t ); + if (tmpTime != NULL) { + m_aDate = OUString::createFromAscii( tmpTime ); + sal_Int32 i = m_aDate.indexOf('\n'); + if (i > 0) + m_aDate = m_aDate.copy(0, i); + } + + + // try to create file + File aFile(m_aLockname); + if (aFile.open( osl_File_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( osl_File_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(LOCKFILE_GROUP); + rtl::OString aIPCserver = aConfig.ReadKey( LOCKFILE_IPCKEY ); + if (!aIPCserver.equalsIgnoreAsciiCase(rtl::OString("true"))) + return false; + + rtl::OString aHost = aConfig.ReadKey( LOCKFILE_HOSTKEY ); + rtl::OString aUser = aConfig.ReadKey( LOCKFILE_USERKEY ); + + // lockfile from same host? + rtl::OString myHost( impl_getHostname() ); + if (aHost == myHost) { + // lockfile by same UID + OUString myUserName; + Security aSecurity; + aSecurity.getUserName( myUserName ); + rtl::OString myUser(rtl::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(LOCKFILE_GROUP); + + // get information + rtl::OString aHost( impl_getHostname() ); + OUString aUserName; + Security aSecurity; + aSecurity.getUserName( aUserName ); + rtl::OString aUser = OUStringToOString( aUserName, RTL_TEXTENCODING_ASCII_US ); + rtl::OString aTime = OUStringToOString( m_aDate, RTL_TEXTENCODING_ASCII_US ); + rtl::OString aStamp = OUStringToOString( m_aId, RTL_TEXTENCODING_ASCII_US ); + + // write information + aConfig.WriteKey( LOCKFILE_USERKEY, aUser ); + aConfig.WriteKey( LOCKFILE_HOSTKEY, aHost ); + aConfig.WriteKey( LOCKFILE_STAMPKEY, aStamp ); + aConfig.WriteKey( LOCKFILE_TIMEKEY, aTime ); + aConfig.WriteKey( + LOCKFILE_IPCKEY, + m_bIPCserver ? rtl::OString("true") : rtl::OString("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 ); + } +} + + + + + + + + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |