NGX_ERROR_LOG_PATH   38 core/ngx_cycle.c static ngx_str_t  error_log = ngx_string(NGX_ERROR_LOG_PATH);
NGX_ERROR_LOG_PATH  273 core/ngx_log.c     name = (u_char *) NGX_ERROR_LOG_PATH;
NGX_ERROR_LOG_PATH  319 core/ngx_log.c             ngx_cpystrn(p, (u_char *) NGX_ERROR_LOG_PATH, nlen + 1);