libbb: add strncpy_IFNAMSIZ
function old new delta ... udhcp_read_interface 225 220 -5 brctl_main 1151 1146 -5 add_interface 109 104 -5 ipaddr_list_or_flush 2174 2167 -7 do_add_ioctl 88 80 -8 vconfig_main 249 240 -9 do_del_ioctl 78 68 -10 do_iplink 1186 1173 -13 do_if_fetch 766 753 -13 buffer_fill_and_print 196 179 -17 parse_args 1709 1684 -25 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/20 up/down: 11/-140) Total: -129 bytes
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		@@ -140,11 +140,6 @@ struct globals {
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/* NOINLINEs are placed where it results in smaller code (gcc 4.3.1) */
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static void strncpy_IFNAMSIZ(char *dst, const char *src)
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{
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	strncpy(dst, src, IFNAMSIZ);
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}
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static int ioctl_on_skfd(unsigned request, struct ifreq *ifr)
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{
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	return ioctl(skfd, request, ifr);
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