определите классы и индексы сетевого интерфейса локальной виртуальной машины или контейнера (Determine the class and network interface indices of a locally running virtual machine or container)
Имя (Name)
sd_machine_get_class, sd_machine_get_ifindices - Determine the
class and network interface indices of a locally running virtual
machine or container
Синопсис (Synopsis)
#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);
Описание (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.
Возвращаемое значение (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.
Примечание (Note)
These APIs are implemented as a shared library, which can be
compiled and linked to with the libsystemd pkg-config(1) file.
Смотри также (See also)
systemd(1), sd-login(3), systemd-machined.service(8),
sd_pid_get_machine_name(3)
