[PATCH 2/3] pactl: Add signal receiver

[georg@xxxxxxxx (Georg Chini)]

---
 man/pactl.1.xml.in |  2 +-
 src/utils/pactl.c  | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/man/pactl.1.xml.in b/man/pactl.1.xml.in
index 66c0bda9..5279791b 100644
--- a/man/pactl.1.xml.in
+++ b/man/pactl.1.xml.in
@@ -254,7 +254,7 @@ License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
 
     <option>
       <p><opt>subscribe</opt></p>
-      <optdesc><p>Subscribe to events, pactl does not exit by itself, but keeps waiting for new events.</p></optdesc>
+      <optdesc><p>Subscribe to events and signals, pactl does not exit by itself, but keeps waiting for new events.</p></optdesc>
     </option>
 
   </section>
diff --git a/src/utils/pactl.c b/src/utils/pactl.c
index 1f13e60c..87827d38 100644
--- a/src/utils/pactl.c
+++ b/src/utils/pactl.c
@@ -1251,6 +1251,17 @@ static void context_subscribe_callback(pa_context *c, pa_subscription_event_type
     fflush(stdout);
 }
 
+static void context_signal_callback(pa_context *c, const char *signal_object_path, const char *signal, char *signal_parameters, void *userdata) {
+    pa_assert(c);
+
+    printf(_("Signal '%s' from %s\n"),
+           signal,
+           signal_object_path);
+    if (signal_parameters)
+        printf(_("Signal parameters: '%s'\n"), signal_parameters);
+    fflush(stdout);
+}
+
 static void context_state_callback(pa_context *c, void *userdata) {
     pa_operation *o = NULL;
 
@@ -1498,6 +1509,15 @@ static void context_state_callback(pa_context *c, void *userdata) {
                                              PA_SUBSCRIPTION_MASK_CARD,
                                              NULL,
                                              NULL);
+                    if (o) {
+                        pa_operation_unref(o);
+                        actions++;
+                    }
+
+                    pa_context_set_signal_callback(c, context_signal_callback, NULL);
+
+                    o = pa_context_subscribe_signals(c, (uint64_t) -1, NULL, NULL);
+
                     break;
 
                 default:
-- 
2.14.1