Every file in this commit has a change to check the return value of a call.

5 files changed, 48 insertions, 28 deletions

diff --git a/core/apps/textedit/textedit.cpp b/core/apps/textedit/textedit.cpp
index 759e440..61beac5 100644
--- a/core/apps/textedit/textedit.cpp
+++ b/core/apps/textedit/textedit.cpp
@@ -659,28 +659,29 @@ void TextEdit::newFile( const DocLnk &f ) {
     updateCaption( currentFileName);
 //    editor->setEdited( false);
 }
 
 void TextEdit::openDotFile( const QString &f ) {
     if(!currentFileName.isEmpty()) {
-    currentFileName=f;
-
-    odebug << "openFile dotfile " + currentFileName << oendl;
-    QString txt;
-    QFile file(f);
-    file.open(IO_ReadWrite);
-    QTextStream t(&file);
-    while ( !t.atEnd()) {
-        txt+=t.readLine()+"\n";
-    }
-    editor->setText(txt);
-    editor->setEdited( false);
-    edited1=false;
-    edited=false;
-
-
+        currentFileName=f;
+
+        odebug << "openFile dotfile " + currentFileName << oendl;
+        QString txt;
+        QFile file(f);
+        if (!file.open(IO_ReadWrite))
+	    owarn << "Failed to open file " << file.name() << oendl;
+        else {
+	    QTextStream t(&file);
+            while ( !t.atEnd()) {
+                txt+=t.readLine()+"\n";
+            }
+            editor->setText(txt);
+            editor->setEdited( false);
+            edited1=false;
+            edited=false;
+	}
     }
     updateCaption( currentFileName);
 }
 
 void TextEdit::openFile( const QString &f ) {
   odebug << "filename is "+ f << oendl;
diff --git a/core/launcher/qprocess_unix.cpp b/core/launcher/qprocess_unix.cpp
index 97c0460..3125bcc 100644
--- a/core/launcher/qprocess_unix.cpp
+++ b/core/launcher/qprocess_unix.cpp
@@ -310,13 +310,17 @@ void QProcessManager::removeMe()
     }
 }
 
 void QProcessManager::sigchldHnd( int fd )
 {
     char tmp;
-    ::read( fd, &tmp, sizeof(tmp) );
+    if (::read( fd, &tmp, sizeof(tmp) ) < 0)
+#if defined(QT_QPROCESS_DEBUG)
+        odebug << "QProcessManager::sigchldHnd() failed dummy read of file descriptor" << oendl;
+#endif
+	;
 #if defined(QT_QPROCESS_DEBUG)
     odebug << "QProcessManager::sigchldHnd()" << oendl;
 #endif
     QProc *proc;
     QProcess *process;
     bool removeProc;
diff --git a/core/launcher/server.cpp b/core/launcher/server.cpp
index 921b790..c45265a 100644
--- a/core/launcher/server.cpp
+++ b/core/launcher/server.cpp
@@ -364,22 +364,30 @@ void Server::systemMsg(const QCString &msg, const QByteArray &data)
         QString baseFile, sigFile, deltaFile;
         stream >> baseFile >> sigFile >> deltaFile;
         QRsync::generateDiff( baseFile, sigFile, deltaFile );
     } else if ( msg == "rdiffApplyPatch(QString,QString)" ) {
         QString baseFile, deltaFile;
         stream >> baseFile >> deltaFile;
+        bool fileWasCreated = false;
         if ( !QFile::exists( baseFile ) ) {
             QFile f( baseFile );
-            f.open( IO_WriteOnly );
+            fileWasCreated = f.open( IO_WriteOnly );
             f.close();
         }
-        QRsync::applyDiff( baseFile, deltaFile );
+        if ( fileWasCreated ) {
+            QRsync::applyDiff( baseFile, deltaFile );
 #ifndef QT_NO_COP
-        QCopEnvelope e( "QPE/Desktop", "patchApplied(QString)" );
-        e << baseFile;
+            QCopEnvelope e( "QPE/Desktop", "patchApplied(QString)" );
+            e << baseFile;
 #endif
+        } else {
+#ifndef QT_NO_COP
+            QCopEnvelope e( "QPE/Desktop", "patchUnapplied(QString)" );
+            e << baseFile;
+#endif
+        }
     } else if ( msg == "rdiffCleanup()" ) {
         mkdir( "/tmp/rdiff" );
         QDir dir;
         dir.setPath( "/tmp/rdiff" );
         QStringList entries = dir.entryList();
         for ( QStringList::Iterator it = entries.begin(); it != entries.end(); ++it )
@@ -995,12 +1003,13 @@ void Server::startSoundServer() {
         connect(process, SIGNAL(processExited(Opie::Core::OProcess*)),
                 SLOT(soundServerExited()));
     }
 
     process->clearArguments();
     *process << QPEApplication::qpeDir() + "bin/qss";
-    process->start();
+    if (!process->start())
+	owarn << "Sound server process did not start" << oendl;
 }
 
 void Server::soundServerExited() {
     QTimer::singleShot(5000, this, SLOT(startSoundServer()));
 }
diff --git a/core/settings/launcher/menusettings.cpp b/core/settings/launcher/menusettings.cpp
index 29ce841..d63b203 100644
--- a/core/settings/launcher/menusettings.cpp
+++ b/core/settings/launcher/menusettings.cpp
@@ -30,12 +30,13 @@ _;:,   .>  :=|.         This file is free software; you can
 
 #include <qpe/config.h>
 #include <qpe/qlibrary.h>
 #include <qpe/qpeapplication.h>
 #include <qpe/menuappletinterface.h>
 #include <qpe/qcopenvelope_qws.h>
+#include <opie2/odebug.h>
 
 #include <qdir.h>
 #include <qlistview.h>
 #include <qcheckbox.h>
 #include <qheader.h>
 #include <qlayout.h>
@@ -91,13 +92,15 @@ void MenuSettings::init ( )
 	for ( QStringList::Iterator it = list. begin ( ); it != list. end ( ); ++it ) {
 		QString name;
 		QPixmap icon;
 		MenuAppletInterface *iface = 0;
 
 		QLibrary *lib = new QLibrary ( path + "/" + *it );
-		lib-> queryInterface ( IID_MenuApplet, (QUnknownInterface**) &iface );
+		QRESULT retVal = QS_OK;
+		if ((retVal = lib-> queryInterface ( IID_MenuApplet, (QUnknownInterface**)(&iface) )) != QS_OK )
+		        owarn << "queryInterface failed with " << retVal << oendl;
         if ( iface ) {
 			QString lang = getenv( "LANG" );
 			QTranslator *trans = new QTranslator ( qApp );
 			QString type = (*it). left ((*it). find ("."));
 			QString tfn = QPEApplication::qpeDir ( ) + "i18n/" + lang + "/" + type + ".qm";
 			if ( trans-> load ( tfn ))
diff --git a/core/settings/launcher/taskbarsettings.cpp b/core/settings/launcher/taskbarsettings.cpp
index 861ff3a..c2b82b9 100644
--- a/core/settings/launcher/taskbarsettings.cpp
+++ b/core/settings/launcher/taskbarsettings.cpp
@@ -88,13 +88,15 @@ void TaskbarSettings::init ( )
         QString name;
         QPixmap icon;
         TaskbarNamedAppletInterface *iface = 0;
 
         owarn << "Load applet: " << (*it) << "" << oendl;
         QLibrary *lib = new QLibrary ( path + "/" + *it );
-        lib-> queryInterface ( IID_TaskbarNamedApplet, (QUnknownInterface**) &iface );
+	QRESULT retVal = QS_OK;
+        if ((retVal = lib-> queryInterface ( IID_TaskbarNamedApplet, (QUnknownInterface**)(&iface) )) != QS_OK)
+	    owarn << "<0>" << oendl;
         owarn << "<1>" << oendl;
         if ( iface ) {
             owarn << "<2>" << oendl;
             QString lang = getenv( "LANG" );
             QTranslator *trans = new QTranslator ( qApp );
             QString type = (*it). left ((*it). find ("."));
@@ -107,16 +109,17 @@ void TaskbarSettings::init ( )
             icon = iface-> icon ( );
             iface-> release ( );
         }
         owarn << "<3>" << oendl;
         if ( !iface ) {
             owarn << "<4>" << oendl;
-            lib-> queryInterface ( IID_TaskbarApplet, (QUnknownInterface**) &iface );
+            if ((retVal = lib-> queryInterface ( IID_TaskbarApplet, (QUnknownInterface**)(&iface))) != QS_OK)
+		owarn << "<5>" << oendl;
 
             if ( iface ) {
-                owarn << "<5>" << oendl;
+                owarn << "<6>" << oendl;
                 name = (*it). mid ( 3 );
                 owarn << "Found applet: " << name << "" << oendl;
 #ifdef Q_OS_MACX
                 int sep = name. find( ".dylib" );
 #else
                 int sep = name. find( ".so" );
@@ -127,16 +130,16 @@ void TaskbarSettings::init ( )
                 if ( sep == (int) name.length ( ) - 6 )
                     name. truncate ( sep );
                 name[0] = name[0]. upper ( );
                 iface-> release ( );
             }
         }
-        owarn << "<6>" << oendl;
+        owarn << "<7>" << oendl;
 
         if ( iface ) {
-            owarn << "<7>" << oendl;
+            owarn << "<8>" << oendl;
             QCheckListItem *item;
             item = new QCheckListItem ( m_list, name, QCheckListItem::CheckBox );
             if ( !icon. isNull ( ))
                 item-> setPixmap ( 0, icon );
             item-> setOn ( exclude. find ( *it ) == exclude. end ( ));
             m_applets [*it] = item;