NAME¶

sd_machine_get_class, sd_machine_get_ifindices - Determine the class and network interface indices of a locally running virtual machine or container

SYNOPSIS¶

#include <elogind/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. 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 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.

NOTES¶

Functions described here are available as a shared library, which can be compiled against and linked to with the libelogind pkg-config(8) file.

HISTORY¶

sd_machine_get_class() and sd_machine_get_ifindices() were added in version 217.

SEE ALSO¶

elogind(8),

sd-login(3), elogind-machined.service(8), sd_pid_get_machine_name(3)