сопоставить индекс сетевого интерфейса с его соответствующим именем (map a network interface index to its corresponding name)
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_indextoname — map a network interface index to its
corresponding name
Синопсис (Synopsis)
#include <net/if.h>
char *if_indextoname(unsigned ifindex, char *ifname);
Описание (Description)
The if_indextoname() function shall map an interface index to its
corresponding name.
When this function is called, ifname shall point to a buffer of
at least {IF_NAMESIZE} bytes. The function shall place in this
buffer the name of the interface with index ifindex.
Возвращаемое значение (Return value)
If ifindex is an interface index, then the function shall return
the value supplied in ifname, which points to a buffer now
containing the interface name. Otherwise, the function shall
return a null pointer and set errno to indicate the error.
Ошибки (Error)
The if_indextoname() function shall fail if:
ENXIO The interface does not exist.
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_nameindex(3p),
if_nametoindex(3p), setsockopt(3p)
The Base Definitions volume of POSIX.1‐2017, net_if.h(0p)
