ngx_os_signal_process 1039 src/core/ngx_cycle.c     return ngx_os_signal_process(cycle, sig, pid);
ngx_os_signal_process   41 src/os/unix/ngx_os.h ngx_int_t ngx_os_signal_process(ngx_cycle_t *cycle, char *sig, ngx_int_t pid);