QML Tools: add some checks for QFile::open failures

Change-Id: Ic95509efbd7ce33d6e98a52eef3dd319cd328306
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

3 files changed, 19 insertions, 13 deletions

diff --git a/tools/qmlformat/qmlformat.cpp b/tools/qmlformat/qmlformat.cpp
index 1262bb6391..e26a6412c9 100644
--- a/tools/qmlformat/qmlformat.cpp
+++ b/tools/qmlformat/qmlformat.cpp
@@ -175,11 +175,14 @@ static bool parseFile(const QString &filename, const Options &options)
         res = fileItem.writeOut(filename, numberOfBackupFiles, lwOptions, &fw, checks);
     } else {
         QFile out;
-        out.open(stdout, QIODevice::WriteOnly);
-        LineWriter lw([&out](QStringView s) { out.write(s.toUtf8()); }, filename, lwOptions);
-        OutWriter ow(lw);
-        res = fileItem.writeOutForFile(ow, checks);
-        ow.flush();
+        if (out.open(stdout, QIODevice::WriteOnly)) {
+            LineWriter lw([&out](QStringView s) { out.write(s.toUtf8()); }, filename, lwOptions);
+            OutWriter ow(lw);
+            res = fileItem.writeOutForFile(ow, checks);
+            ow.flush();
+        } else {
+            res = false;
+        }
     }
     return res;
 }
@@ -259,8 +262,7 @@ Options buildCommandLineOptions(const QCoreApplication &app)
     QStringList files;
     if (!parser.value("files").isEmpty()) {
         QFile file(parser.value("files"));
-        file.open(QIODevice::Text | QIODevice::ReadOnly);
-        if (file.isOpen()) {
+        if (file.open(QIODevice::Text | QIODevice::ReadOnly)) {
             QTextStream in(&file);
             while (!in.atEnd()) {
                 QString file = in.readLine();
diff --git a/tools/qmllint/main.cpp b/tools/qmllint/main.cpp
index 0c59e47169..89864c7c38 100644
--- a/tools/qmllint/main.cpp
+++ b/tools/qmllint/main.cpp
@@ -512,8 +512,10 @@ All warnings can be set to three levels:
             QTextStream(stdout) << QString::fromUtf8(json);
         } else {
             QFile file(fileName);
-            file.open(QFile::WriteOnly);
-            file.write(json);
+            if (file.open(QFile::WriteOnly))
+                file.write(json);
+            else
+                success = false;
         }
     }
 
diff --git a/tools/qmltc/qmltccodewriter.cpp b/tools/qmltc/qmltccodewriter.cpp
index d4eb57606c..a8aa0d5f2b 100644
--- a/tools/qmltc/qmltccodewriter.cpp
+++ b/tools/qmltc/qmltccodewriter.cpp
@@ -230,12 +230,14 @@ static void writeToFile(const QString &path, const QByteArray &data)
     QFileInfo fi(path);
     if (fi.exists() && fi.size() == data.size()) {
         QFile oldFile(path);
-        oldFile.open(QIODevice::ReadOnly);
-        if (oldFile.readAll() == data)
-            return;
+        if (oldFile.open(QIODevice::ReadOnly)) {
+            if (oldFile.readAll() == data)
+                return;
+        }
     }
     QFile file(path);
-    file.open(QIODevice::WriteOnly);
+    if (!file.open(QIODevice::WriteOnly))
+        qFatal("Could not open file %s", qPrintable(path));
     file.write(data);
 }