systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

[Evgeniy Berdnikov]

On Fri, Nov 24, 2017 at 07:12:31AM +0300, Maxim Dounin wrote:
> +        if (read(pp[0], buf, 1) != 1) {
> +            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "read() pipe failed");
> +            return NGX_ERROR;
> +        }
> +
> +        if (close(pp[0]) == -1) {
> +            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");

 "close() pipe failed"

> +            return NGX_ERROR;
> +        }
> +
>          exit(0);
>      }
>  
> @@ -68,3 +98,26 @@
>  
>      return NGX_OK;
>  }
> +
> +
> +ngx_int_t
> +ngx_daemon_sync(ngx_log_t *log)
> +{
> +    if (ngx_daemon_fd == NGX_INVALID_FILE) {
> +        return NGX_OK;
> +    }
> +
> +    if (write(ngx_daemon_fd, "", 1) != 1) {
> +        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "write() failed");

 "write() pipe failed"

> +        return NGX_ERROR;
> +    }
> +
> +    if (close(ngx_daemon_fd) == -1) {
> +        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "close() failed");

 "close() pipe failed"

> +        return NGX_ERROR;

 Можно ещё заменить "pp" на "sync_fd" / "sync_pipe".
-- 
 Eugene Berdnikov