sd_machine_get_class

systemd
Developer Lennart Poettering lennart@poettering.net
sd_machine_get_class 3
sd_machine_get_class sd_machine_get_ifindices Determine the class and network interface indices of a locally running virtual machine or container.

    #include <systemd/sd-login.h>

int `sd_machine_get_class` const char* machine char **class int `sd_machine_get_ifindices` const char* machine int **ifindices

## Description

`sd_machine_get_class()` may be used to determine the class of a locally running virtual machine or container that is registered with systemd-machined.service 8. The string returned is either `vm` or `container`. The returned string needs to be freed with the libc free 3 call after use.

`sd_machine_get_ifindices()` may be used to determine the numeric indices of the network interfaces on the host that are pointing towards the specified locally running virtual machine or container that is registered with systemd-machined.service 8. The returned array needs to be freed with the libc free 3 call after use.

## Return Value

On success, these calls return 0 or a positive integer. On failure, these calls return a negative errno-style error code.

## Errors

Returned errors may indicate the following problems:

`-ENXIO`

  The specified machine does not exist or is currently not running.

`-EINVAL`

  An input parameter was invalid (out of range, or NULL, where that is not accepted).

`-ENOMEM`

  Memory allocation failed.

## Notes

The `sd_machine_get_class()` and `sd_machine_get_ifindices()` interfaces are available as a shared library, which can be compiled and linked to with the `libsystemd` pkg-config 1 file.

## See Also

systemd 1, sd-login 3, systemd-machined.service 8, sd_pid_get_machine_name 3