NGX_ENOSYS       1198 src/event/ngx_event.c     } else if (ngx_errno != NGX_ENOSYS) {
NGX_ENOSYS         92 src/event/ngx_event_accept.c             if (use_accept4 && err == NGX_ENOSYS) {
NGX_ENOSYS        129 src/os/unix/ngx_file_aio_read.c         if (n == NGX_ENOSYS) {
NGX_ENOSYS        128 src/os/unix/ngx_linux_aio_read.c     if (err == NGX_ENOSYS) {