默认处置 SIG_DFL 注册函数 #include <signal.h> void (*signal(int signo, void(*func)(int)))(int); struct sigaction { void (*sa_handler)(int); sigset_t sa_mask; int sa_flags; }; int sigaction(int signo, const struct sigaction *act, struct sigaction *oldact); POSIX 信号语义 一...