#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
+#include <signal.h>
typedef uint64_t usec_t;
int flush_fd(int fd);
-int ignore_signal(int sig);
+int ignore_signals(int sig, ...);
+int default_signals(int sig, ...);
+int sigaction_many(const struct sigaction *sa, ...);
int close_pipe(int p[]);