Check if file exists in seed mode

src/base/bittorrent/session.cpp

@@ -4270,6 +4270,9 @@ void Session::handleAlert(const lt::alert *a)
         case lt::file_error_alert::alert_type:
             handleFileErrorAlert(static_cast<const lt::file_error_alert*>(a));
             break;
+        case lt::read_piece_alert::alert_type:
+            handleReadPieceAlert(static_cast<const lt::read_piece_alert*>(a));
+            break;
         case lt::add_torrent_alert::alert_type:
             handleAddTorrentAlert(static_cast<const lt::add_torrent_alert*>(a));
             break;
@@ -4388,6 +4391,15 @@ void Session::createTorrentHandle(const lt::torrent_handle &nativeHandle)
     // Torrent could have error just after adding to libtorrent
     if (torrent->hasError())
         LogMsg(tr("Torrent errored. Torrent: \"%1\". Error: %2.").arg(torrent->name(), torrent->error()), Log::WARNING);
+
+    // Check if file(s) exist when using seed mode
+    if (params.skipChecking && torrent->hasMetadata()) {
+#if (LIBTORRENT_VERSION_NUM < 10200)
+        nativeHandle.read_piece(0);
+#else
+        nativeHandle.read_piece(lt::piece_index_t(0));
+#endif
+    }
 }
 
 void Session::handleAddTorrentAlert(const lt::add_torrent_alert *p)
@@ -4492,6 +4504,21 @@ void Session::handleFileErrorAlert(const lt::file_error_alert *p)
     m_recentErroredTorrentsTimer->start();
 }
 
+void Session::handleReadPieceAlert(const lt::read_piece_alert *p) const
+{
+#if (LIBTORRENT_VERSION_NUM < 10200)
+    if (p->ec) {
+        p->handle.auto_managed(false);
+        p->handle.force_recheck();
+    }
+#else
+    if (p->error) {
+        p->handle.unset_flags(lt::torrent_flags::auto_managed);
+        p->handle.force_recheck();
+    }
+#endif
+}
+
 void Session::handlePortmapWarningAlert(const lt::portmap_error_alert *p)
 {
     LogMsg(tr("UPnP/NAT-PMP: Port mapping failure, message: %1").arg(QString::fromStdString(p->message())), Log::CRITICAL);

src/base/bittorrent/session.h

@@ -567,6 +567,7 @@ namespace BitTorrent
         void handleStateUpdateAlert(const lt::state_update_alert *p);
         void handleMetadataReceivedAlert(const lt::metadata_received_alert *p);
         void handleFileErrorAlert(const lt::file_error_alert *p);
+        void handleReadPieceAlert(const lt::read_piece_alert *p) const;
         void handleTorrentRemovedAlert(const lt::torrent_removed_alert *p);
         void handleTorrentDeletedAlert(const lt::torrent_deleted_alert *p);
         void handleTorrentDeleteFailedAlert(const lt::torrent_delete_failed_alert *p);