SIGCHLD            74 os/unix/ngx_process.c     { SIGCHLD, "SIGCHLD", "", ngx_signal_handler },
SIGCHLD           383 os/unix/ngx_process.c         case SIGCHLD:
SIGCHLD           432 os/unix/ngx_process.c     if (signo == SIGCHLD) {
SIGCHLD            98 os/unix/ngx_process_cycle.c     sigaddset(&set, SIGCHLD);