ruby_signal       489 signal.c           return ruby_signal(signum, handler);
ruby_signal       513 signal.c           ruby_signal(sig, sighandler);
ruby_signal       849 signal.c           oldfunc = ruby_signal(sig, func);
ruby_signal       997 signal.c           old = ruby_signal(signum, handler);
ruby_signal       999 signal.c       	ruby_signal(signum, old);
ruby_signal      1026 signal.c           oldfunc = ruby_signal(sig, SIG_DFL);
ruby_signal      1028 signal.c       	ruby_signal(sig, oldfunc);
ruby_signal      1051 signal.c           oldfunc = ruby_signal(SIGINT, SIG_IGN);
ruby_signal      1053 signal.c       	ruby_signal(SIGINT, SIG_DFL);