ruby_signal       587 signal.c       ruby_signal(int signum, sighandler_t handler)
ruby_signal       644 signal.c       ruby_signal(int signum, sighandler_t handler)
ruby_signal       654 signal.c       #define ruby_signal(sig,handler) (/* rb_trap_accept_nativethreads[(sig)] = 0,*/ signal((sig),(handler)))