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author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2013-02-15 21:57:54 -0600 |
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committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2013-02-15 21:57:54 -0600 |
commit | ed99a30644c19b0a3cf0d2147243532df4daa16b (patch) | |
tree | 7f3f2850e59824fdf100a642367a82b1e7f0204f /tdeabc/lock.cpp | |
parent | e5f2d46e9caf6942f365f1b454087dda71a340f7 (diff) | |
download | tdelibs-ed99a30644c19b0a3cf0d2147243532df4daa16b.tar.gz tdelibs-ed99a30644c19b0a3cf0d2147243532df4daa16b.zip |
Rename additional header files to avoid conflicts with KDE4
Diffstat (limited to 'tdeabc/lock.cpp')
-rw-r--r-- | tdeabc/lock.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/tdeabc/lock.cpp b/tdeabc/lock.cpp new file mode 100644 index 000000000..a78cb4c5b --- /dev/null +++ b/tdeabc/lock.cpp @@ -0,0 +1,162 @@ +/* + This file is part of libkabc. + Copyright (c) 2001,2003 Cornelius Schumacher <schumacher@kde.org> + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#include "lock.h" + +#include <tdeapplication.h> +#include <kdebug.h> +#include <tdelocale.h> +#include <kstandarddirs.h> +#include <tdetempfile.h> + +#include <tqfile.h> + +#include <signal.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +using namespace KABC; + +Lock::Lock( const TQString &identifier ) + : mIdentifier( identifier ) +{ + mIdentifier.replace( "/", "_" ); +} + +Lock::~Lock() +{ + unlock(); +} + +TQString Lock::locksDir() +{ + return locateLocal( "data", "tdeabc/lock/" ); +} + +bool Lock::readLockFile( const TQString &filename, int &pid, TQString &app ) +{ + TQFile file( filename ); + if ( !file.open( IO_ReadOnly ) ) return false; + + TQTextStream t( &file ); + pid = t.readLine().toInt(); + app = t.readLine(); + + return true; +} + +bool Lock::writeLockFile( const TQString &filename ) +{ + TQFile file( filename ); + if ( !file.open( IO_WriteOnly ) ) return false; + TQTextStream t( &file ); + t << ::getpid() << endl << TQString( TDEGlobal::instance()->instanceName() ); + + return true; +} + +TQString Lock::lockFileName() const +{ + return locksDir() + mIdentifier + ".lock"; +} + +bool Lock::lock() +{ + kdDebug(5700) << "Lock::lock()" << endl; + + TQString lockName = lockFileName(); + kdDebug(5700) << "-- lock name: " << lockName << endl; + + if ( TQFile::exists( lockName ) ) { // check if it is a stale lock file + int pid; + TQString app; + + if ( !readLockFile( lockFileName(), pid, app ) ) { + mError = i18n("Unable to open lock file."); + return false; + } + + int retval = ::kill( pid, 0 ); + if ( retval == -1 && errno == ESRCH ) { // process doesn't exists anymore + TQFile::remove( lockName ); + kdWarning(5700) << "Removed stale lock file from process '" << app << "'" + << endl; + } else { + TQString identifier( mIdentifier ); + identifier.replace( '_', '/' ); + + mError = i18n("The address book '%1' is locked by application '%2'.\nIf you believe this is incorrect, just remove the lock file from '%3'") + .arg( identifier ).arg( app ).arg( locateLocal( "data", "tdeabc/lock/*.lock" ) ); + return false; + } + } + + TQString lockUniqueName; + lockUniqueName = mIdentifier + kapp->randomString( 8 ); + mLockUniqueName = locateLocal( "data", "tdeabc/lock/" + lockUniqueName ); + kdDebug(5700) << "-- lock unique name: " << mLockUniqueName << endl; + + // Create unique file + writeLockFile( mLockUniqueName ); + + // Create lock file + int result = ::link( TQFile::encodeName( mLockUniqueName ), + TQFile::encodeName( lockName ) ); + + if ( result == 0 ) { + mError = ""; + emit locked(); + return true; + } + + // TODO: check stat + + mError = i18n("Error"); + return false; +} + +bool Lock::unlock() +{ + int pid; + TQString app; + if ( readLockFile( lockFileName(), pid, app ) ) { + if ( pid == getpid() ) { + TQFile::remove( lockFileName() ); + TQFile::remove( mLockUniqueName ); + emit unlocked(); + } else { + mError = i18n("Unlock failed. Lock file is owned by other process: %1 (%2)") + .arg( app ).arg( TQString::number( pid ) ); + kdDebug() << "Lock::unlock(): " << mError << endl; + return false; + } + } + + mError = ""; + return true; +} + +TQString Lock::error() const +{ + return mError; +} + +#include "lock.moc" |