229 lines
6.9 KiB
C++
229 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_desktop.hxx"
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#include <stdlib.h>
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#include <time.h>
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#ifndef WNT
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#include <unistd.h>
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#else
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#include <windows.h>
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#endif
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#include <sal/types.h>
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#include <osl/file.hxx>
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#include <osl/socket.hxx>
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#include <osl/security.hxx>
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#include <unotools/bootstrap.hxx>
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#include <tools/string.hxx>
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#include <tools/config.hxx>
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#include "lockfile.hxx"
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using namespace ::osl;
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using namespace ::rtl;
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using namespace ::utl;
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static rtl::OString impl_getHostname()
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{
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rtl::OString aHost;
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#ifdef WNT
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/*
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prevent windows from connecting to the net to get it's own
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hostname by using the netbios name
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*/
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sal_Int32 sz = MAX_COMPUTERNAME_LENGTH + 1;
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char* szHost = new char[sz];
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if (GetComputerName(szHost, (LPDWORD)&sz))
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aHost = OString(szHost);
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else
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aHost = OString("UNKNOWN");
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delete[] szHost;
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#else
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/* Don't do dns lookup on Linux either */
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sal_Char pHostName[1024];
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if ( gethostname( pHostName, sizeof( pHostName ) - 1 ) == 0 )
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{
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pHostName[sizeof( pHostName ) - 1] = '\0';
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aHost = OString( pHostName );
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}
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else
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aHost = OString("UNKNOWN");
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#endif
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return aHost;
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}
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namespace desktop {
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Lockfile::Lockfile( bool bIPCserver )
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:m_bIPCserver(bIPCserver)
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,m_bRemove(sal_False)
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,m_bIsLocked(sal_False)
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{
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// build the file-url to use for the lock
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OUString aUserPath;
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utl::Bootstrap::locateUserInstallation( aUserPath );
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m_aLockname = aUserPath + LOCKFILE_SUFFIX;
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// generate ID
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const int nIdBytes = 16;
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char tmpId[nIdBytes*2+1];
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time_t t;
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srand( (unsigned)(t = time( NULL )) );
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int tmpByte = 0;
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for (int i = 0; i<nIdBytes; i++) {
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tmpByte = rand( ) % 0xFF;
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sprintf( tmpId+i*2, "%02X", tmpByte );
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}
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tmpId[nIdBytes*2]=0x00;
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m_aId = OUString::createFromAscii( tmpId );
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// generate date string
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char *tmpTime = ctime( &t );
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if (tmpTime != NULL) {
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m_aDate = OUString::createFromAscii( tmpTime );
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sal_Int32 i = m_aDate.indexOf('\n');
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if (i > 0)
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m_aDate = m_aDate.copy(0, i);
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}
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// try to create file
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File aFile(m_aLockname);
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if (aFile.open( osl_File_OpenFlag_Create ) == File::E_EXIST) {
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m_bIsLocked = sal_True;
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} else {
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// new lock created
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aFile.close( );
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syncToFile( );
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m_bRemove = sal_True;
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}
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}
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sal_Bool Lockfile::check( fpExecWarning execWarning )
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{
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if (m_bIsLocked) {
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// lock existed, ask user what to do
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if (isStale() ||
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(execWarning != 0 && (*execWarning)( this ))) {
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// remove file and create new
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File::remove( m_aLockname );
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File aFile(m_aLockname);
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aFile.open( osl_File_OpenFlag_Create );
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aFile.close( );
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syncToFile( );
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m_bRemove = sal_True;
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return sal_True;
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} else {
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//leave alone and return false
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m_bRemove = sal_False;
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return sal_False;
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}
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} else {
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// lock was created by us
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return sal_True;
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}
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}
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sal_Bool Lockfile::isStale( void ) const
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{
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// this checks whether the lockfile was created on the same
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// host by the same user. Should this be the case it is safe
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// to assume that it is a stale lockfile which can be overwritten
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String aLockname = m_aLockname;
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Config aConfig(aLockname);
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aConfig.SetGroup(LOCKFILE_GROUP);
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rtl::OString aIPCserver = aConfig.ReadKey( LOCKFILE_IPCKEY );
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if (!aIPCserver.equalsIgnoreAsciiCase(rtl::OString("true")))
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return false;
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rtl::OString aHost = aConfig.ReadKey( LOCKFILE_HOSTKEY );
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rtl::OString aUser = aConfig.ReadKey( LOCKFILE_USERKEY );
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// lockfile from same host?
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rtl::OString myHost( impl_getHostname() );
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if (aHost == myHost) {
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// lockfile by same UID
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OUString myUserName;
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Security aSecurity;
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aSecurity.getUserName( myUserName );
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rtl::OString myUser(rtl::OUStringToOString(myUserName, RTL_TEXTENCODING_ASCII_US));
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if (aUser == myUser)
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return sal_True;
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}
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return sal_False;
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}
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void Lockfile::syncToFile( void ) const
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{
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String aLockname = m_aLockname;
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Config aConfig(aLockname);
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aConfig.SetGroup(LOCKFILE_GROUP);
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// get information
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rtl::OString aHost( impl_getHostname() );
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OUString aUserName;
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Security aSecurity;
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aSecurity.getUserName( aUserName );
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rtl::OString aUser = OUStringToOString( aUserName, RTL_TEXTENCODING_ASCII_US );
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rtl::OString aTime = OUStringToOString( m_aDate, RTL_TEXTENCODING_ASCII_US );
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rtl::OString aStamp = OUStringToOString( m_aId, RTL_TEXTENCODING_ASCII_US );
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// write information
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aConfig.WriteKey( LOCKFILE_USERKEY, aUser );
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aConfig.WriteKey( LOCKFILE_HOSTKEY, aHost );
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aConfig.WriteKey( LOCKFILE_STAMPKEY, aStamp );
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aConfig.WriteKey( LOCKFILE_TIMEKEY, aTime );
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aConfig.WriteKey(
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LOCKFILE_IPCKEY,
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m_bIPCserver ? rtl::OString("true") : rtl::OString("false") );
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aConfig.Flush( );
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}
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Lockfile::~Lockfile( void )
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{
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// unlock userdata by removing file
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if ( m_bRemove )
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File::remove( m_aLockname );
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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