sd_machine_get_class

systemd
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 **ret_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. The vm or container must be registered with systemd-machined.service 8. The output parameter ret_ifindices may be passed as `NULL` when the output value is not needed. The returned array needs to be freed with the libc free 3 call after use.

## Return Value

On success, these functions return a non-negative integer. `sd_machine_get_ifindices()` returns the number of the relevant network interfaces. 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.

## See Also

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