Isolate interupt management

Provision daemon features:
 - SIGTERM for terminating
 - SIGHUP for config reload

Change-Id: Id45a0b963812105c22ead5a0a2004f3f531a2a65
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

diff --git a/src/main.c b/src/main.c
index a1b09c1..b7f8637 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -99,10 +99,49 @@ static void start_list(struct afb_config_list *list,
  +--------------------------------------------------------- */
 static void exit_handler()
 {
+       struct sigaction siga;
+
+       memset(&siga, 0, sizeof siga);
+       siga.sa_handler = SIG_IGN;
+       sigaction(SIGTERM, &siga, NULL);
+
        if (SELF_PGROUP)
-               killpg(0, SIGHUP);
+               killpg(0, SIGTERM);
        else if (childpid > 0)
-               killpg(childpid, SIGHUP);
+               killpg(childpid, SIGTERM);
+}
+
+static void on_sigterm(int signum, siginfo_t *info, void *uctx)
+{
+       NOTICE("Received SIGTERM");
+       exit(0);
+}
+
+static void on_sighup(int signum, siginfo_t *info, void *uctx)
+{
+       NOTICE("Received SIGHUP");
+       /* TODO */
+}
+
+static void setup_daemon()
+{
+       struct sigaction siga;
+
+       /* install signal handlers */
+       memset(&siga, 0, sizeof siga);
+       siga.sa_flags = SA_SIGINFO;
+
+       siga.sa_sigaction = on_sigterm;
+       sigaction(SIGTERM, &siga, NULL);
+
+       siga.sa_sigaction = on_sighup;
+       sigaction(SIGHUP, &siga, NULL);
+
+       /* handle groups */
+       atexit(exit_handler);
+
+       /* ignore any SIGPIPE */
+       signal(SIGPIPE, SIG_IGN);
 }
 
 /*----------------------------------------------------------
@@ -462,6 +501,7 @@ static void start()
 error:
        exit(1);
 }
+
 /*---------------------------------------------------------
  | main
  |   Parse option and launch action
@@ -488,11 +528,8 @@ int main(int argc, char *argv[])
                INFO("entering foreground mode");
        }
 
-       /* handle groups */
-       atexit(exit_handler);
-
-       /* ignore any SIGPIPE */
-       signal(SIGPIPE, SIG_IGN);
+       /* set the daemon environment */
+       setup_daemon();
 
        /* enter job processing */
        jobs_start(3, 0, 50, start);