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diff --git a/qtermwidget/k3processcontroller.cpp b/qtermwidget/k3processcontroller.cpp
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+/* This file is part of the KDE libraries
+ Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at)
+
+ Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008
+
+ 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 "k3processcontroller.h"
+#include "k3process.h"
+
+//#include <config.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <QtCore/QSocketNotifier>
+
+class K3ProcessController::Private
+{
+public:
+ Private()
+ : needcheck( false ),
+ notifier( 0 )
+ {
+ }
+
+ ~Private()
+ {
+ delete notifier;
+ }
+
+ int fd[2];
+ bool needcheck;
+ QSocketNotifier *notifier;
+ QList<K3Process*> kProcessList;
+ QList<int> unixProcessList;
+ static struct sigaction oldChildHandlerData;
+ static bool handlerSet;
+ static int refCount;
+ static K3ProcessController* instance;
+};
+
+K3ProcessController *K3ProcessController::Private::instance = 0;
+int K3ProcessController::Private::refCount = 0;
+
+void K3ProcessController::ref()
+{
+ if ( !Private::refCount ) {
+ Private::instance = new K3ProcessController;
+ setupHandlers();
+ }
+ Private::refCount++;
+}
+
+void K3ProcessController::deref()
+{
+ Private::refCount--;
+ if( !Private::refCount ) {
+ resetHandlers();
+ delete Private::instance;
+ Private::instance = 0;
+ }
+}
+
+K3ProcessController* K3ProcessController::instance()
+{
+ /*
+ * there were no safety guards in previous revisions, is that ok?
+ if ( !Private::instance ) {
+ ref();
+ }
+ */
+
+ return Private::instance;
+}
+
+K3ProcessController::K3ProcessController()
+ : d( new Private )
+{
+ if( pipe( d->fd ) )
+ {
+ perror( "pipe" );
+ abort();
+ }
+
+ fcntl( d->fd[0], F_SETFL, O_NONBLOCK ); // in case slotDoHousekeeping is called without polling first
+ fcntl( d->fd[1], F_SETFL, O_NONBLOCK ); // in case it fills up
+ fcntl( d->fd[0], F_SETFD, FD_CLOEXEC );
+ fcntl( d->fd[1], F_SETFD, FD_CLOEXEC );
+
+ d->notifier = new QSocketNotifier( d->fd[0], QSocketNotifier::Read );
+ d->notifier->setEnabled( true );
+ QObject::connect( d->notifier, SIGNAL(activated(int)),
+ SLOT(slotDoHousekeeping()));
+}
+
+K3ProcessController::~K3ProcessController()
+{
+#ifndef Q_OS_MAC
+/* not sure why, but this is causing lockups */
+ close( d->fd[0] );
+ close( d->fd[1] );
+#else
+#warning FIXME: why does close() freeze up destruction?
+#endif
+
+ delete d;
+}
+
+
+extern "C" {
+static void theReaper( int num )
+{
+ K3ProcessController::theSigCHLDHandler( num );
+}
+}
+
+#ifdef Q_OS_UNIX
+struct sigaction K3ProcessController::Private::oldChildHandlerData;
+#endif
+bool K3ProcessController::Private::handlerSet = false;
+
+void K3ProcessController::setupHandlers()
+{
+ if( Private::handlerSet )
+ return;
+ Private::handlerSet = true;
+
+#ifdef Q_OS_UNIX
+ struct sigaction act;
+ sigemptyset( &act.sa_mask );
+
+ act.sa_handler = SIG_IGN;
+ act.sa_flags = 0;
+ sigaction( SIGPIPE, &act, 0L );
+
+ act.sa_handler = theReaper;
+ act.sa_flags = SA_NOCLDSTOP;
+ // CC: take care of SunOS which automatically restarts interrupted system
+ // calls (and thus does not have SA_RESTART)
+#ifdef SA_RESTART
+ act.sa_flags |= SA_RESTART;
+#endif
+ sigaction( SIGCHLD, &act, &Private::oldChildHandlerData );
+
+ sigaddset( &act.sa_mask, SIGCHLD );
+ // Make sure we don't block this signal. gdb tends to do that :-(
+ sigprocmask( SIG_UNBLOCK, &act.sa_mask, 0 );
+#else
+ //TODO: win32
+#endif
+}
+
+void K3ProcessController::resetHandlers()
+{
+ if( !Private::handlerSet )
+ return;
+ Private::handlerSet = false;
+
+#ifdef Q_OS_UNIX
+ sigset_t mask, omask;
+ sigemptyset( &mask );
+ sigaddset( &mask, SIGCHLD );
+ sigprocmask( SIG_BLOCK, &mask, &omask );
+
+ struct sigaction act;
+ sigaction( SIGCHLD, &Private::oldChildHandlerData, &act );
+ if (act.sa_handler != theReaper) {
+ sigaction( SIGCHLD, &act, 0 );
+ Private::handlerSet = true;
+ }
+
+ sigprocmask( SIG_SETMASK, &omask, 0 );
+#else
+ //TODO: win32
+#endif
+ // there should be no problem with SIGPIPE staying SIG_IGN
+}
+
+// the pipe is needed to sync the child reaping with our event processing,
+// as otherwise there are race conditions, locking requirements, and things
+// generally get harder
+void K3ProcessController::theSigCHLDHandler( int arg )
+{
+ int saved_errno = errno;
+
+ char dummy = 0;
+ ::write( instance()->d->fd[1], &dummy, 1 );
+
+#ifdef Q_OS_UNIX
+ if ( Private::oldChildHandlerData.sa_handler != SIG_IGN &&
+ Private::oldChildHandlerData.sa_handler != SIG_DFL ) {
+ Private::oldChildHandlerData.sa_handler( arg ); // call the old handler
+ }
+#else
+ //TODO: win32
+#endif
+
+ errno = saved_errno;
+}
+
+int K3ProcessController::notifierFd() const
+{
+ return d->fd[0];
+}
+
+void K3ProcessController::unscheduleCheck()
+{
+ char dummy[16]; // somewhat bigger - just in case several have queued up
+ if( ::read( d->fd[0], dummy, sizeof(dummy) ) > 0 )
+ d->needcheck = true;
+}
+
+void
+K3ProcessController::rescheduleCheck()
+{
+ if( d->needcheck )
+ {
+ d->needcheck = false;
+ char dummy = 0;
+ ::write( d->fd[1], &dummy, 1 );
+ }
+}
+
+void K3ProcessController::slotDoHousekeeping()
+{
+ char dummy[16]; // somewhat bigger - just in case several have queued up
+ ::read( d->fd[0], dummy, sizeof(dummy) );
+
+ int status;
+ again:
+ QList<K3Process*>::iterator it( d->kProcessList.begin() );
+ QList<K3Process*>::iterator eit( d->kProcessList.end() );
+ while( it != eit )
+ {
+ K3Process *prc = *it;
+ if( prc->runs && waitpid( prc->pid_, &status, WNOHANG ) > 0 )
+ {
+ prc->processHasExited( status );
+ // the callback can nuke the whole process list and even 'this'
+ if (!instance())
+ return;
+ goto again;
+ }
+ ++it;
+ }
+ QList<int>::iterator uit( d->unixProcessList.begin() );
+ QList<int>::iterator ueit( d->unixProcessList.end() );
+ while( uit != ueit )
+ {
+ if( waitpid( *uit, 0, WNOHANG ) > 0 )
+ {
+ uit = d->unixProcessList.erase( uit );
+ deref(); // counterpart to addProcess, can invalidate 'this'
+ } else
+ ++uit;
+ }
+}
+
+bool K3ProcessController::waitForProcessExit( int timeout )
+{
+#ifdef Q_OS_UNIX
+ for(;;)
+ {
+ struct timeval tv, *tvp;
+ if (timeout < 0)
+ tvp = 0;
+ else
+ {
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+ tvp = &tv;
+ }
+
+ fd_set fds;
+ FD_ZERO( &fds );
+ FD_SET( d->fd[0], &fds );
+
+ switch( select( d->fd[0]+1, &fds, 0, 0, tvp ) )
+ {
+ case -1:
+ if( errno == EINTR )
+ continue;
+ // fall through; should never happen
+ case 0:
+ return false;
+ default:
+ slotDoHousekeeping();
+ return true;
+ }
+ }
+#else
+ //TODO: win32
+ return false;
+#endif
+}
+
+void K3ProcessController::addKProcess( K3Process* p )
+{
+ d->kProcessList.append( p );
+}
+
+void K3ProcessController::removeKProcess( K3Process* p )
+{
+ d->kProcessList.removeAll( p );
+}
+
+void K3ProcessController::addProcess( int pid )
+{
+ d->unixProcessList.append( pid );
+ ref(); // make sure we stay around when the K3Process goes away
+}
+
+//#include "moc_k3processcontroller.cpp"