bluetooth module handles rfkill events instantly

include/modules/bluetooth.hpp

@@ -5,6 +5,7 @@
 
 #include <fmt/chrono.h>
 #include "util/sleeper_thread.hpp"
+#include "util/rfkill.hpp"
 
 namespace waybar::modules {
 
@@ -17,6 +18,8 @@ class Bluetooth : public ALabel {
  private:
   std::string           status_;
   util::SleeperThread 	thread_;
+
+  util::Rfkill rfkill_;
 };
 
 }  // namespace waybar::modules

include/modules/network.hpp

@@ -11,6 +11,7 @@
 #include <sys/epoll.h>
 #include "ALabel.hpp"
 #include "util/sleeper_thread.hpp"
+#include "util/rfkill.hpp"
 
 namespace waybar::modules {
 
@@ -71,6 +72,8 @@ class Network : public ALabel {
 
   util::SleeperThread thread_;
   util::SleeperThread thread_timer_;
+
+  util::Rfkill rfkill_;
 };
 
 }  // namespace waybar::modules

include/util/rfkill.hpp

@@ -2,8 +2,20 @@
 
 #include <linux/rfkill.h>
 
-namespace waybar::util::rfkill {
+namespace waybar::util {
 
-bool isDisabled(enum rfkill_type rfkill_type);
+class Rfkill {
+ public:
+  Rfkill(enum rfkill_type rfkill_type);
+  ~Rfkill() = default;
+  bool isDisabled() const;
+  void waitForEvent();
+  int getState();
+
+ private:
+  enum rfkill_type rfkill_type_;
+  int state_ = 0;
+  int prev_state_ = 0;
+};
 
 }  // namespace waybar::util

src/modules/bluetooth.cpp

@@ -1,25 +1,23 @@
 #include "modules/bluetooth.hpp"
 #include "util/rfkill.hpp"
 #include <linux/rfkill.h>
-
 #include <time.h>
 
+#include <iostream>
+
 waybar::modules::Bluetooth::Bluetooth(const std::string& id, const Json::Value& config)
     : ALabel(config, "bluetooth", id, "{status}", 10),
-      status_("disabled") {
+      status_("disabled"),
+      rfkill_(*(new waybar::util::Rfkill(RFKILL_TYPE_BLUETOOTH))) {
   thread_ = [this] {
     dp.emit();
-    auto now = std::chrono::system_clock::now();
-    auto timeout = std::chrono::floor<std::chrono::seconds>(now + interval_);
-    auto diff = std::chrono::seconds(timeout.time_since_epoch().count() % interval_.count());
-    thread_.sleep_until(timeout - diff);
+    rfkill_.waitForEvent();
   };
-  //dp.emit();
 }
 
 auto waybar::modules::Bluetooth::update() -> void {
   status_ = "enabled";
-  if (waybar::util::rfkill::isDisabled(RFKILL_TYPE_BLUETOOTH)) {
+  if (rfkill_.getState()) {
     status_ = "disabled";
   } else {
     status_ = "enabled";
@@ -35,7 +33,7 @@ auto waybar::modules::Bluetooth::update() -> void {
       ////auto tooltip_text = fmt::format(tooltip_format, localtime);
       //label_.set_tooltip_text(tooltip_text);
     //} else {
-      //label_.set_tooltip_text(text);
+      //label_.set_tooltip_text(status_);
     //}
   //}
 }

src/modules/network.cpp

@@ -87,7 +87,9 @@ waybar::modules::Network::Network(const std::string &id, const Json::Value &conf
       cidr_(-1),
       signal_strength_dbm_(0),
       signal_strength_(0),
-      frequency_(0) {
+      frequency_(0),
+      rfkill_(*(new waybar::util::Rfkill(RFKILL_TYPE_WLAN))) {
+
   auto down_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_DOWN_TOTAL_KEY);
   auto up_octets = read_netstat(BANDWIDTH_CATEGORY, BANDWIDTH_UP_TOTAL_KEY);
   if (down_octets) {
@@ -224,7 +226,7 @@ void waybar::modules::Network::worker() {
 
 const std::string waybar::modules::Network::getNetworkState() const {
   if (ifid_ == -1) {
-    if (waybar::util::rfkill::isDisabled(RFKILL_TYPE_WLAN))
+    if (rfkill_.isDisabled())
       return "disabled";
     return "disconnected";
   }

src/util/rfkill.cpp

@@ -3,9 +3,71 @@
 #include <stdlib.h>
 #include <cstring>
 #include <fcntl.h>
+#include <sys/poll.h>
 #include <cerrno>
+#include <stdio.h>
 
-bool waybar::util::rfkill::isDisabled(enum rfkill_type rfkill_type) {
+waybar::util::Rfkill::Rfkill(const enum rfkill_type rfkill_type)
+  : rfkill_type_(rfkill_type) {
+}
+
+void waybar::util::Rfkill::waitForEvent() {
+  struct rfkill_event event;
+  struct pollfd p;
+  ssize_t len;
+  int fd, n;
+
+  fd = open("/dev/rfkill", O_RDONLY);
+  if (fd < 0) {
+    //perror("Can't open RFKILL control device");
+    return;
+  }
+
+  memset(&p, 0, sizeof(p));
+  p.fd = fd;
+  p.events = POLLIN | POLLHUP;
+
+  while (1) {
+    n = poll(&p, 1, -1);
+    if (n < 0) {
+      //perror("Failed to poll RFKILL control device");
+      break;
+    }
+
+    if (n == 0)
+      continue;
+
+    len = read(fd, &event, sizeof(event));
+    if (len < 0) {
+      //perror("Reading of RFKILL events failed");
+      break;
+    }
+
+    if (len != RFKILL_EVENT_SIZE_V1) {
+      //fprintf(stderr, "Wrong size of RFKILL event\n");
+      continue;
+    }
+
+    if(event.type == rfkill_type_) {
+      state_ = event.soft || event.hard;
+      if (prev_state_ != state_) {
+        prev_state_ = state_;
+        break;
+      }
+      //ret = event.soft || event.hard;
+    }
+  }
+
+  close(fd);
+  return;
+}
+
+
+int waybar::util::Rfkill::getState() {
+  return state_;
+}
+
+bool waybar::util::Rfkill::isDisabled() const {
   struct rfkill_event event;
   ssize_t len;
   int fd;
@@ -38,7 +100,7 @@ bool waybar::util::rfkill::isDisabled(enum rfkill_type rfkill_type) {
       return false;
     }
 
-    if(event.type == rfkill_type) {
+    if(event.type == rfkill_type_) {
       ret = event.soft || event.hard;
       break;
     }