sd_machine_get_class, sd_machine_get_ifindices - Determine the class and network
interface indices of a locally running virtual machine or container
sd_machine_get_class(const char* machine,
sd_machine_get_ifindices(const char* machine,
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.
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.
Returned errors may indicate the following problems:
The specified machine does not exist or is currently not
An input parameter was invalid (out of range, or
NULL, where that is not accepted).
Memory allocation failed.
These APIs are implemented as a shared library, which can be compiled and linked
to with the libsystemd pkg-config(1) file.