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if_nametoindex(3)       Library Functions Manual       if_nametoindex(3)

ИМЯ

       if_nametoindex, if_indextoname - mappings between network
       interface names and indexes

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <net/if.h>

       unsigned int if_nametoindex(const char *ifname);
       char *if_indextoname(unsigned int ifindex, char *ifname);

ОПИСАНИЕ

       The if_nametoindex() function returns the index of the network
       interface corresponding to the name ifname.

       The if_indextoname() function returns the name of the network
       interface corresponding to the interface index ifindex.  The name
       is placed in the buffer pointed to by ifname.  The buffer must
       allow for the storage of at least IF_NAMESIZE bytes.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       On success, if_nametoindex() returns the index number of the
       network interface; on error, 0 is returned and errno is set to
       indicate the error.

       On success, if_indextoname() returns ifname; on error, NULL is
       returned and errno is set to indicate the error.

ОШИБКИ

       if_nametoindex() may fail and set errno if:

       ENODEV No interface found with given name.

       if_indextoname() may fail and set errno if:

       ENXIO  No interface found for the index.

       if_nametoindex() and if_indextoname() may also fail for any of
       the errors specified for socket(2) or ioctl(2).

АТРИБУТЫ

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ if_nametoindex(), if_indextoname()  │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

СТАНДАРТЫ

       POSIX.1-2008, RFC 3493.

ИСТОРИЯ

       POSIX.1-2001.  BSDi.

СМОТРИТЕ ТАКЖЕ

       getifaddrs(3), if_nameindex(3), ifconfig(8)

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
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       2024-06-26.  If you discover any rendering problems in this HTML
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       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02              if_nametoindex(3)

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