SIG_IGN           193 os/unix/ngx_freebsd_rfork_thread.c         sa.sa_handler = SIG_IGN;
SIG_IGN            76 os/unix/ngx_process.c     { SIGSYS, "SIGSYS, SIG_IGN", "", SIG_IGN },
SIG_IGN            78 os/unix/ngx_process.c     { SIGPIPE, "SIGPIPE, SIG_IGN", "", SIG_IGN },