jackdmp: Signal to systemd when ready

With this patch it is possibly to start the JACK daemon with a systemd
service file of type notify. The following provides an example service
file:

[Service]
Type=notify
ExecStart=/usr/bin/jackd -d alsa

[Install]
WantedBy=multi-user.target

Signed-off-by: Timo Wischer <twischer@de.adit-jv.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/common/Jackdmp.cpp b/common/Jackdmp.cpp
index 3d634346..e7198f4d 100644
--- a/common/Jackdmp.cpp
+++ b/common/Jackdmp.cpp
@@ -43,6 +43,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #include "audio_reserve.h"
 #endif
 
+#if HAVE_SYSTEMD
+#include <systemd/sd-daemon.h>
+#endif
+
 /*
 This is a simple port of the old jackdmp.cpp file to use the new jack2 control API. Available options for the server
 are "hard-coded" in the source. A much better approach would be to use the control API to:
@@ -624,6 +628,10 @@ int main(int argc, char** argv)
     notify_sent = true;
     return_value = 0;
 
+#if HAVE_SYSTEMD
+    sd_notify(0, "READY=1");
+#endif
+
     // Waits for signal
 #ifdef __ANDROID__
     //reserve SIGUSR2 signal for switching master driver
@@ -639,6 +647,10 @@ int main(int argc, char** argv)
     jackctl_wait_signals(sigmask);
 #endif
 
+#if HAVE_SYSTEMD
+    sd_notify(0, "STOPPING=1");
+#endif
+
  stop_server:
     if (!jackctl_server_stop(server_ctl)) {
         fprintf(stderr, "Cannot stop server...\n");