* Main process now has 'hard termination time' - maximum time between getting termination signal and waiting for workers

CMakeLists.txt

@@ -423,6 +423,9 @@ ENDIF(HAVE_SYS_WAIT_H)
 IF(HAVE_TIME_H)
 	LIST(APPEND CMAKE_REQUIRED_INCLUDES time.h)
 ENDIF(HAVE_TIME_H)
+IF(HAVE_SYS_TIME_H)
+	LIST(APPEND CMAKE_REQUIRED_INCLUDES sys/time.h)
+ENDIF(HAVE_SYS_TIME_H)
 
 CHECK_FUNCTION_EXISTS(setproctitle HAVE_SETPROCTITLE)
 CHECK_FUNCTION_EXISTS(getpagesize HAVE_GETPAGESIZE)
@@ -434,6 +437,7 @@ CHECK_FUNCTION_EXISTS(flock HAVE_FLOCK)
 CHECK_FUNCTION_EXISTS(tanhl HAVE_TANHL)
 CHECK_FUNCTION_EXISTS(sendfile HAVE_SENDFILE)
 CHECK_FUNCTION_EXISTS(mkstemp HAVE_MKSTEMP)
+CHECK_FUNCTION_EXISTS(setitimer HAVE_SETITIMER)
 CHECK_FUNCTION_EXISTS(clock_gettime HAVE_CLOCK_GETTIME)
 
 CHECK_SYMBOL_EXISTS(PATH_MAX limits.h HAVE_PATH_MAX)

config.h.in

@@ -111,6 +111,8 @@
 #cmakedefine HAVE_CLOCK_VIRTUAL  1
 #cmakedefine HAVE_CLOCK_PROCESS_CPUTIME_ID  1
 
+#cmakedefine HAVE_SETITIMER      1
+
 #cmakedefine WITHOUT_PERL        1
 
 #cmakedefine WITH_LUA            1

src/main.c

@@ -51,6 +51,9 @@
 /* 2 seconds to fork new process in place of dead one */
 #define SOFT_FORK_TIME 2
 
+/* 10 seconds after getting termination signal to terminate all workers with SIGKILL */
+#define HARD_TERMINATION_TIME 10
+
 
 rspamd_hash_t                  *counters;
 
@@ -406,11 +409,30 @@ fork_worker (struct rspamd_main *rspamd, struct worker_conf *cf)
 	return cur;
 }
 
+static void
+set_alarm (guint seconds)
+{
+#ifdef HAVE_SETITIMER
+	static struct itimerval         itv;
+
+	itv.it_interval.tv_sec = 0;
+	itv.it_interval.tv_usec = 0;
+	itv.it_value.tv_sec = seconds;
+	itv.it_value.tv_usec = 0;
+
+	if (setitimer (ITIMER_REAL, &itv, NULL) == -1) {
+		msg_err ("set alarm failed: %s", strerror (errno));
+	}
+#else
+	(void)alarm (seconds);
+#endif
+}
+
 static void
 delay_fork (struct worker_conf *cf)
 {
 	workers_pending = g_list_prepend (workers_pending, cf);
-	(void)alarm (SOFT_FORK_TIME);
+	set_alarm (SOFT_FORK_TIME);
 }
 
 
@@ -581,9 +603,22 @@ wait_for_workers (gpointer key, gpointer value, gpointer unused)
 	struct rspamd_worker          *w = value;
 	gint                            res = 0;
 
-	waitpid (w->pid, &res, 0);
+	if (got_alarm) {
+		got_alarm = 0;
+		/* Set alarm for hard termination */
+		set_alarm (HARD_TERMINATION_TIME);
+	}
+
+	if (waitpid (w->pid, &res, 0) == -1) {
+		if (errno == EINTR) {
+			msg_info ("terminate worker %P with SIGKILL", w->pid);
+			kill (w->pid, SIGKILL);
+			got_alarm = 1;
+		}
+	}
 
-	msg_debug ("%s process %P terminated", process_to_str (w->type), w->pid);
+	msg_info ("%s process %P terminated %s", process_to_str (w->type), w->pid,
+			got_alarm ? "hardly" : "softly");
 	g_free (w->cf);
 	g_free (w);
 
@@ -1023,6 +1058,17 @@ main (gint argc, gchar **argv, gchar **env)
 		}
 	}
 
+	/* Restore some signals */
+	sigemptyset (&signals.sa_mask);
+	sigaddset (&signals.sa_mask, SIGALRM);
+	sigaddset (&signals.sa_mask, SIGINT);
+	sigaddset (&signals.sa_mask, SIGTERM);
+	sigaction (SIGALRM, &signals, NULL);
+	sigaction (SIGTERM, &signals, NULL);
+	sigaction (SIGINT, &signals, NULL);
+	sigprocmask (SIG_UNBLOCK, &signals.sa_mask, NULL);
+	/* Set alarm for hard termination */
+	set_alarm (HARD_TERMINATION_TIME);
 	/* Wait for workers termination */
 	g_hash_table_foreach_remove (rspamd->workers, wait_for_workers, NULL);