close stdin in vassals

emperor.c

@@ -379,8 +379,22 @@ void emperor_add(char *name, time_t born, char *config, uint32_t config_size, ui
 		}
 		vassal_argv[counter] = NULL;
 
+		// disable stdin
+		int stdin_fd = open("/dev/null", O_RDONLY);
+                if (stdin_fd < 0) {
+                	uwsgi_error_open("/dev/null");
+                        exit(1);
+                }
+                if (stdin_fd != 0) {
+                	if (dup2(stdin_fd, 0)) {
+                        	uwsgi_error("dup2()");
+                                exit(1);
+                        }
+                        close(stdin_fd);
+                }
+
 		// close all of the unneded fd
-		for(i=3;i<sysconf(_SC_OPEN_MAX);i++) {
+		for(i=3;i<(int)uwsgi.max_fd;i++) {
 			if (i != n_ui->pipe[1]) {
 				close(i);
 			}
@@ -435,6 +449,7 @@ void emperor_loop() {
 	int nevents;
 	int interesting_fd;
 	char notification_message[64];
+	struct rlimit rl;
 
 	uwsgi.emperor_stats_fd = -1;
 
@@ -446,6 +461,13 @@ void emperor_loop() {
 
 	memset(&ui_base, 0, sizeof(struct uwsgi_instance));
 
+	if (getrlimit(RLIMIT_NOFILE, &rl)) {
+		uwsgi_error("getrlimit()");
+		exit(1);
+	}
+
+	uwsgi.max_fd = rl.rlim_cur;
+
 
 	emperor_queue = event_queue_init();