вернуть все имена и индексы сетевых интерфейсов (return all network interface names and indexes)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
if_nameindex — return all network interface names and indexes
Синопсис (Synopsis)
#include <net/if.h>
struct if_nameindex *if_nameindex(void);
Описание (Description)
The if_nameindex() function shall return an array of if_nameindex
structures, one structure per interface. The end of the array is
indicated by a structure with an if_index field of zero and an
if_name field of NULL.
Applications should call if_freenameindex() to release the memory
that may be dynamically allocated by this function, after they
have finished using it.
Возвращаемое значение (Return value)
An array of structures identifying local interfaces. A null
pointer is returned upon an error, with errno set to indicate the
error.
Ошибки (Error)
The if_nameindex() function may fail if:
ENOBUFS
Insufficient resources are available to complete the
function.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
getsockopt(3p), if_freenameindex(3p), if_indextoname(3p),
if_nametoindex(3p), setsockopt(3p)
The Base Definitions volume of POSIX.1‐2017, net_if.h(0p)
