From 0485864d38666e439572675a6c2d3ca025819cf3 Mon Sep 17 00:00:00 2001
From: Christophe Dumez <chris@qbittorrent.org>
Date: Wed, 30 Sep 2009 18:36:47 +0000
Subject: [PATCH] - Fix a crash when scanned directory does not exist

---
 src/bittorrent.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/bittorrent.cpp b/src/bittorrent.cpp
index 37a1e9acd..085d0da90 100644
--- a/src/bittorrent.cpp
+++ b/src/bittorrent.cpp
@@ -1044,6 +1044,11 @@ void bittorrent::saveTrackerFile(QString hash) {
 // Enable directory scanning
 void bittorrent::enableDirectoryScanning(QString scan_dir) {
   if(!scan_dir.isEmpty()) {
+    QDir newDir(scan_dir);
+    if(!newDir.exists()) {
+      qDebug("Scan dir %s does not exist, create it", scan_dir.toUtf8().data());
+      newDir.mkpath(scan_dir);
+    }
     if(FSWatcher == 0) {
       FSMutex = new QMutex();
       FSWatcher = new QFileSystemWatcher(QStringList(scan_dir), this);
@@ -1051,9 +1056,12 @@ void bittorrent::enableDirectoryScanning(QString scan_dir) {
       // Initial scan
       scanDirectory(scan_dir);
     } else {
-      QString old_scan_dir = FSWatcher->directories().first();
+      QString old_scan_dir = "";
+      if(!FSWatcher->directories().empty())
+        old_scan_dir = FSWatcher->directories().first();
       if(old_scan_dir != scan_dir) {
-        FSWatcher->removePath(old_scan_dir);
+        if(!old_scan_dir.isEmpty())
+          FSWatcher->removePath(old_scan_dir);
         FSWatcher->addPath(scan_dir);
         // Initial scan
         scanDirectory(scan_dir);