pause/unpause via SIGUSR1/SIGUSR2

README.pod

@@ -148,7 +148,14 @@ The progress value can be set with a hint, too.
 =head1 MISCELLANEOUS
 
 Dunst can be paused by sending a notification with a summary of "DUNST_COMMAND_PAUSE"
-and resumed with a summary of "DUNST_COMMAND_RESUME".
+and resumed with a summary of "DUNST_COMMAND_RESUME". Alternatively you can send SIGUSR1 and SIGUSR2 to pause and unpause respectivly. For Example:
+
+=item killall -SIGUSR1 dunst # pause
+
+=item killall -SIGUSR2 dunst # resume
+
+=back
+
 When paused dunst will not display any notifications but keep all notifications in a queue.
 This can for example be wrapped around a screen locker (i3lock, slock) to prevent flickering
 of notifications through the lock and to read all missed notifications after returning to the computer.

dunst.c

@@ -12,6 +12,7 @@
 #include <fnmatch.h>
 #include <sys/time.h>
 #include <math.h>
+#include <signal.h>
 #include <X11/Xlib.h>
 #include <X11/XKBlib.h>
 #include <X11/Xatom.h>
@@ -108,6 +109,18 @@ void warn(const char *text, int urg);
 void init_shortcut(keyboard_shortcut * shortcut);
 KeySym string_to_mask(char *str);
 
+void pause_signal_handler(int sig)
+{
+        if (sig == SIGUSR1) {
+                pause_display = true;
+        }
+        if (sig == SIGUSR2) {
+                pause_display = false;
+        }
+
+        signal (sig, pause_signal_handler);
+}
+
 static void print_notification(notification * n)
 {
         printf("{\n");
@@ -1714,6 +1727,8 @@ int main(int argc, char *argv[])
 
         initdbus();
         setup();
+        signal (SIGUSR1, pause_signal_handler);
+        signal (SIGUSR2, pause_signal_handler);
 
         if (deprecated_mod)
                 warn("-mod is deprecated. Use \"-key mod+key\" instead\n",