Add systemd socket activation for epmd.

Check for systemd libraries and headers in confgiure.
Add -systemd option enabling waiting for sockets from systemd.

1 files changed, 7 insertions, 0 deletions

diff --git a/erts/epmd/src/epmd_int.h b/erts/epmd/src/epmd_int.h
index 656dbd1f45..363923eaa9 100644
--- a/erts/epmd/src/epmd_int.h
+++ b/erts/epmd/src/epmd_int.h
@@ -110,6 +110,10 @@
 
 #include <stdarg.h>
 
+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
+#  include <systemd/sd-daemon.h>
+#endif
+
 /* ************************************************************************ */
 /* Replace some functions by others by making the function name a macro */
 
@@ -321,6 +325,9 @@ typedef struct {
   int listenfd[MAX_LISTEN_SOCKETS];
   char *addresses;
   char **argv;
+#ifdef HAVE_SYSTEMD_SD_DAEMON_H
+  int is_systemd;
+#endif
 } EpmdVars;
 
 void dbg_printf(EpmdVars*,int,const char*,...);