Add "autosave" config option.

src/common/config/CommonConfig.cpp

@@ -67,6 +67,7 @@ xmrig::CommonConfig::CommonConfig() :
     m_adjusted(false),
     m_apiIPv6(false),
     m_apiRestricted(true),
+    m_autoSave(true),
     m_background(false),
     m_colors(true),
     m_dryRun(false),
@@ -217,7 +218,7 @@ bool xmrig::CommonConfig::save()
     rapidjson::PrettyWriter<rapidjson::FileWriteStream> writer(os);
     doc.Accept(writer);
 
-    fclose(fp);
+    fflush(fp);
 
     uv_fs_close(uv_default_loop(), &req, fd, nullptr);
     uv_fs_req_cleanup(&req);
@@ -308,10 +309,14 @@ bool xmrig::CommonConfig::parseBoolean(int key, bool enable)
         m_apiRestricted = enable;
         break;
 
-    case IConfig::DryRunKey: /* --dry-run */
+    case DryRunKey: /* --dry-run */
         m_dryRun = enable;
         break;
 
+    case AutoSaveKey:
+        m_autoSave = enable;
+        break;
+
     default:
         break;
     }

src/common/config/CommonConfig.h

@@ -44,6 +44,7 @@ public:
 
     inline bool isApiIPv6() const                  { return m_apiIPv6; }
     inline bool isApiRestricted() const            { return m_apiRestricted; }
+    inline bool isAutoSave() const                 { return m_autoSave; }
     inline bool isBackground() const               { return m_background; }
     inline bool isColors() const                   { return m_colors; }
     inline bool isDryRun() const                   { return m_dryRun; }
@@ -88,6 +89,7 @@ protected:
     bool m_adjusted;
     bool m_apiIPv6;
     bool m_apiRestricted;
+    bool m_autoSave;
     bool m_background;
     bool m_colors;
     bool m_dryRun;

src/common/interfaces/IConfig.h

@@ -65,6 +65,7 @@ public:
         WatchKey          = 1105,
         TlsKey            = 1013,
         FingerprintKey    = 1014,
+        AutoSaveKey       = 1016,
 
         // xmrig common
         CPUPriorityKey    = 1021,