Fix filename validation on non-Windows OS

Closes #11191.

src/base/utils/fs.cpp

@@ -230,7 +230,19 @@ bool Utils::Fs::isValidFileSystemName(const QString &name, const bool allowSepar
 {
     if (name.isEmpty()) return false;
 
-    const QRegularExpression regex(allowSeparators ? "[:?\"*<>|]" : "[\\\\/:?\"*<>|]");
+#if defined(Q_OS_WIN)
+    const QRegularExpression regex {allowSeparators
+        ? QLatin1String("[:?\"*<>|]")
+        : QLatin1String("[\\\\/:?\"*<>|]")};
+#elif defined(Q_OS_MACOS)
+    const QRegularExpression regex {allowSeparators
+        ? QLatin1String("[\\0:]")
+        : QLatin1String("[\\0/:]")};
+#else
+    const QRegularExpression regex {allowSeparators
+        ? QLatin1String("[\\0]")
+        : QLatin1String("[\\0/]")};
+#endif
     return !name.contains(regex);
 }
 

src/gui/torrentcontenttreeview.cpp

@@ -108,7 +108,7 @@ void TorrentContentTreeView::renameSelectedFile(BitTorrent::TorrentHandle *torre
             , modelIndex.data().toString(), &ok, isFile).trimmed();
     if (!ok) return;
 
-    if (newName.isEmpty() || !Utils::Fs::isValidFileSystemName(newName)) {
+    if (!Utils::Fs::isValidFileSystemName(newName)) {
         RaisedMessageBox::warning(this, tr("Rename error"),
                                   tr("The name is empty or contains forbidden characters, please choose a different one."),
                                   QMessageBox::Ok);
@@ -227,7 +227,7 @@ void TorrentContentTreeView::renameSelectedFile(BitTorrent::TorrentInfo &torrent
             , modelIndex.data().toString(), &ok, isFile).trimmed();
     if (!ok) return;
 
-    if (newName.isEmpty() || !Utils::Fs::isValidFileSystemName(newName)) {
+    if (!Utils::Fs::isValidFileSystemName(newName)) {
         RaisedMessageBox::warning(this, tr("Rename error"),
                                   tr("The name is empty or contains forbidden characters, please choose a different one."),
                                   QMessageBox::Ok);