if_indextoname(unsigned ifindex, char *ifname)
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.
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.
本文详细介绍了if_indextoname函数的功能及使用方法。该函数用于将接口索引映射到对应的接口名称,并返回指向缓冲区的指针,其中包含指定索引的接口名称。如果索引有效,则返回相应的接口名称;否则返回NULL指针并设置错误代码。
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