Perform gracious shutdown upon receipt of SIGTERM. Finally we can

test the whole protocol shutdown code... :)

3 files changed, 40 insertions, 0 deletions

diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index d8713f4c..aa4f652a 100644
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -747,11 +747,19 @@ io_loop(void)
 	{
 	  async_config();
 	  async_config_flag = 0;
+	  continue;
 	}
       if (async_dump_flag)
 	{
 	  async_dump();
 	  async_dump_flag = 0;
+	  continue;
+	}
+      if (async_shutdown_flag)
+	{
+	  async_shutdown();
+	  async_shutdown_flag = 0;
+	  continue;
 	}
 
       /* And finally enter select() to find active sockets */
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c
index 7b306539..71bb712a 100644
--- a/sysdep/unix/main.c
+++ b/sysdep/unix/main.c
@@ -26,6 +26,8 @@
 #include "unix.h"
 #include "krt.h"
 
+int shutting_down;
+
 /*
  *	Debugging
  */
@@ -83,6 +85,24 @@ async_config(void)
 }
 
 /*
+ *	Shutdown
+ */
+
+void
+async_shutdown(void)
+{
+  debug("Shutting down...\n");
+  shutting_down = 1;
+  protos_shutdown();
+}
+
+void
+protos_shutdown_notify(void)
+{
+  die("System shutdown completed");
+}
+
+/*
  *	Signals
  */
 
@@ -101,6 +121,13 @@ handle_sigusr(int sig)
 }
 
 static void
+handle_sigterm(int sig)
+{
+  debug("Caught SIGTERM...\n");
+  async_shutdown_flag = 1;
+}
+
+static void
 signal_init(void)
 {
   struct sigaction sa;
@@ -112,6 +139,9 @@ signal_init(void)
   sa.sa_handler = handle_sighup;
   sa.sa_flags = SA_RESTART;
   sigaction(SIGHUP, &sa, NULL);
+  sa.sa_handler = handle_sigterm;
+  sa.sa_flags = SA_RESTART;
+  sigaction(SIGTERM, &sa, NULL);
   signal(SIGPIPE, SIG_IGN);
 }
 
diff --git a/sysdep/unix/unix.h b/sysdep/unix/unix.h
index a79db2ed..e5271021 100644
--- a/sysdep/unix/unix.h
+++ b/sysdep/unix/unix.h
@@ -13,11 +13,13 @@
 
 void async_config(void);
 void async_dump(void);
+void async_shutdown(void);
 
 /* io.c */
 
 volatile int async_config_flag;
 volatile int async_dump_flag;
+volatile int async_shutdown_flag;
 
 void io_init(void);
 void io_loop(void);