ubuntu 下 man if_indextoname 没有,怎么找？

[honggaoyan]

ubuntu 下 man if_indextoname 没有,怎么找？

最近学c,,,,,查函数用法man的时候经常没有，，有没有通用的解决方法让我知道我缺少了哪个软件包，，，
让我好sudo apt-get install ****

[xhy]

manpages-dev

[eexpress]

函数。到devhelp里面找。这样的不一定有的。

[xhy]

IF_INDEXTONAME(P) POSIX Programmer's Manual IF_INDEXTONAME(P)



NAME
if_indextoname - map a network interface index to its corresponding
name

SYNOPSIS
#include <net/if.h>

char *if_indextoname(unsigned ifindex, char *ifname);


DESCRIPTION
The if_indextoname() function shall map an interface index to its cor-
responding 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.

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.

ERRORS
The if_indextoname() function shall fail if:

ENXIO The interface does not exist.


The following sections are informative.