---
name: "nbd_kill_subprocess"
section: "3"
platform: "linux"
package: "libnbd"
version: "1.24.4-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nbd_kill_subprocess"
---

# nbd\_kill\_subprocess(3)

kill server running as a subprocess

## NAME

nbd\_kill\_subprocess - kill server running as a subprocess

## SYNOPSIS

```
 #include <libnbd.h>
 int nbd_kill_subprocess (
       struct nbd_handle *h, int signum
     );
```

## DESCRIPTION

This call may be used to kill the server running as a subprocess that was previously created using [**nbd\_connect\_command**(3)](/nbd_connect_command/3.md).  You do not need to use this call.  It is only needed if the server does not exit when the socket is closed.

The `"signum"` parameter is the optional signal number to send (see [**signal**(7)](/signal/7.md)).  If `"signum"` is `0` then `"SIGTERM"` is sent.

## RETURN VALUE

If the call is successful the function returns `0`.

## ERRORS

On error `-1` is returned.

Refer to "ERROR HANDLING" in [**libnbd**(3)](/libnbd/3.md) for how to get further details of the error.

The following parameters must not be NULL: `"h"`. For more information see "Non-NULL parameters" in [**libnbd**(3)](/libnbd/3.md).

## VERSION

This function first appeared in libnbd 1.0.

If you need to test if this function is available at compile time check if the following macro is defined:

```
 #define LIBNBD_HAVE_NBD_KILL_SUBPROCESS 1
```

## SEE ALSO

[**nbd\_connect\_command**(3)](/nbd_connect_command/3.md), [**nbd\_create**(3)](/nbd_create/3.md), [**nbd\_get\_subprocess\_pid**(3)](/nbd_get_subprocess_pid/3.md), [**libnbd**(3)](/libnbd/3.md), [**signal**(7)](/signal/7.md).

## AUTHORS

Eric Blake

Richard W.M. Jones

## COPYRIGHT

Copyright Red Hat

## LICENSE

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