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
@@ -662,22 +662,23 @@ void TextEdit::newFile( const DocLnk &f ) {
 
 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);
 }
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
@@ -313,7 +313,11 @@ 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
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
@@ -367,16 +367,24 @@ void Server::systemMsg(const QCString &msg, const QByteArray &data)
     } 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;
@@ -998,7 +1006,8 @@ void Server::startSoundServer() {
 
     process->clearArguments();
     *process << QPEApplication::qpeDir() + "bin/qss";
-    process->start();
+    if (!process->start())
+        owarn << "Sound server process did not start" << oendl;
 }
 
 void Server::soundServerExited() {
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
@@ -33,6 +33,7 @@ _;:,   .>  :=|.         This file is free software; you can
 #include <qpe/qpeapplication.h>
 #include <qpe/menuappletinterface.h>
 #include <qpe/qcopenvelope_qws.h>
+#include <opie2/odebug.h>
 
 #include <qdir.h>
 #include <qlistview.h>
@@ -94,7 +95,9 @@ void MenuSettings::init ( )
                 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 );
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
@@ -91,7 +91,9 @@ void TaskbarSettings::init ( )
 
         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;
@@ -110,10 +112,11 @@ void TaskbarSettings::init ( )
         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
@@ -130,10 +133,10 @@ void TaskbarSettings::init ( )
                 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 ( ))