fix(config): Trigger reload on correct event

Fixes #85

include/utils/inotify.hpp

@@ -28,17 +28,21 @@ namespace inotify_util {
     void remove();
     bool poll(int wait_ms = 1000);
     unique_ptr<event_t> get_event();
+    bool await_match();
     const string path() const;
 
    protected:
     string m_path;
     int m_fd = -1;
     int m_wd = -1;
+    int m_mask = 0;
   };
 
   using watch_t = unique_ptr<inotify_watch>;
 
   watch_t make_watch(string path);
+
+  bool match(const event_t* evt, int mask);
 }
 
 POLYBAR_NS_END

src/components/controller.cpp

@@ -254,9 +254,7 @@ void controller::install_confwatch() {
     return;
   }
 
-  m_threads.emplace_back([this] {
-    this_thread::sleep_for(chrono::seconds{1});
-
+  m_threads.emplace_back([&] {
     try {
       if (!m_running)
         return;
@@ -265,13 +263,10 @@ void controller::install_confwatch() {
       m_confwatch->attach(IN_MODIFY);
 
       m_log.trace("controller: Wait for config file inotify event");
-      m_confwatch->get_event();
-
-      if (!m_running)
-        return;
-
+      if (m_confwatch->await_match() && m_running) {
         m_log.info("Configuration file changed");
         kill(getpid(), SIGUSR1);
+      }
     } catch (const system_error& err) {
       m_log.err(err.what());
       m_log.trace("controller: Reset config watch");

src/utils/inotify.cpp

@@ -24,6 +24,7 @@ namespace inotify_util {
       throw system_error("Failed to allocate inotify fd");
     if ((m_wd = inotify_add_watch(m_fd, m_path.c_str(), mask)) == -1)
       throw system_error("Failed to attach inotify watch");
+    m_mask |= mask;
   }
 
   /**
@@ -33,6 +34,7 @@ namespace inotify_util {
     if (inotify_rm_watch(m_fd, m_wd) == -1)
       throw system_error("Failed to remove inotify watch");
     m_wd = -1;
+    m_mask = 0;
   }
 
   /**
@@ -81,6 +83,13 @@ namespace inotify_util {
     return event;
   }
 
+  /**
+   * Wait for matching event
+   */
+  bool inotify_watch::await_match() {
+    return (get_event()->mask & m_mask) == m_mask;
+  }
+
   /**
    * Get watch file path
    */
@@ -92,6 +101,10 @@ namespace inotify_util {
     di::injector<watch_t> injector = di::make_injector(di::bind<>().to(path));
     return injector.create<watch_t>();
   }
+
+  bool match(const event_t* evt, int mask) {
+    return (evt->mask & mask) == mask;
+  }
 }
 
 POLYBAR_NS_END