nbd_aio_connect_systemd_socket_activation - connect using systemd socket activation
#include <libnbd.h> int nbd_aio_connect_systemd_socket_activation ( struct nbd_handle *h, char **argv );
Run the command as a subprocess and begin connecting to it using systemd socket activation. Parameters behave as documented in nbd_connect_systemd_socket_activation(3).
You can check if the connection attempt is still underway by calling nbd_aio_is_connecting(3). If nbd_set_opt_mode(3) is enabled, the connection is ready for manual option negotiation once nbd_aio_is_negotiating(3) returns true; otherwise, the connection attempt will include the NBD handshake, and is ready for use once nbd_aio_is_ready(3) returns true.
If the call is successful the function returns
-1 is returned.
Refer to "ERROR HANDLING" in libnbd(3) for how to get further details of the error.
The following parameters must not be NULL:
argv. For more information see "Non-NULL parameters" in libnbd(3).
nbd_aio_connect_systemd_socket_activation can be called when the handle is in the following state:
┌─────────────────────────────────────┬─────────────────────────┐ │ Handle created, before connecting │ ✅ allowed │ │ Connecting │ ❌ error │ │ Connecting & handshaking (opt_mode) │ ❌ error │ │ Connected to the server │ ❌ error │ │ Connection shut down │ ❌ error │ │ Handle dead │ ❌ error │ └─────────────────────────────────────┴─────────────────────────┘
This function first appeared in libnbd 1.2.
If you need to test if this function is available at compile time check if the following macro is defined:
#define LIBNBD_HAVE_NBD_AIO_CONNECT_SYSTEMD_SOCKET_ACTIVATION 1
nbd_aio_is_connecting(3), nbd_aio_is_negotiating(3), nbd_aio_is_ready(3), nbd_connect_systemd_socket_activation(3), nbd_create(3), nbd_set_opt_mode(3), libnbd(3).
Richard W.M. Jones
Copyright Red Hat
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA