socket_getifidx man page on Alpinelinux

socket_getifidx man page on Alpinelinux

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socket_getifidx(3)					    socket_getifidx(3)

NAME
       socket_getifidx - get interface number

SYNTAX
       #include <socket.h>

       int socket_getifidx(const char* ifname);

DESCRIPTION
       socket_getifidx	returns	 the  interface	 number for a symbolic network
       interface name (like "eth0" on Linux, for example).

       The interface number can be used as scope_id for IPv6 communications on
       link-local addresses.

       If  something  goes  wrong,  socket_getifidx  returns -1, setting errno
       appropriately.

SEE ALSO
       socket_getifname(3), socket_connect6(3)

							    socket_getifidx(3)

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