xioctl and friends by Tito <farmatito@tiscali.it>

function                                             old     new   delta
do_iptunnel                                          203     977    +774
process_dev                                         5328    5494    +166
ioctl_or_perror                                        -      54     +54
ioctl_or_perror_and_die                                -      51     +51
ioctl_alt_func                                         -      49     +49
bb_ioctl_or_warn                                       -      47     +47
do_add_ioctl                                         102     145     +43
bb_xioctl                                              -      39     +39
print_value_on_off                                     -      31     +31
get_lcm                                              105     123     +18
arp_main                                            2155    2167     +12
..................
zcip_main                                           1576    1566     -10
setlogcons_main                                       92      82     -10
dumpkmap_main                                        263     253     -10
do_get_ioctl                                          85      75     -10
setkeycodes_main                                     165     154     -11
write_table                                          244     232     -12
vconfig_main                                         318     306     -12
do_del_ioctl                                          93      81     -12
set_address                                           75      62     -13
maybe_set_utc                                         30      16     -14
loadfont_main                                        495     479     -16
slattach_main                                        712     695     -17
do_loadfont                                          191     174     -17
do_iplink                                           1155    1136     -19
getty_main                                          2583    2562     -21
fbset_main                                          2058    2035     -23
do_time                                              588     565     -23
xioctl                                                25       -     -25
read_rtc                                             186     160     -26
parse_conf                                          1299    1270     -29
udhcp_read_interface                                 269     239     -30
bb_ioctl                                              45       -     -45
bb_ioctl_alt                                          70       -     -70
bb_ioctl_on_off                                       78       -     -78
.rodata                                           129370  129018    -352
do_show                                              799       -    -799
------------------------------------------------------------------------------
(add/remove: 6/5 grow/shrink: 13/49 up/down: 1316/-1864)     Total: -548 bytes
   text	   data	    bss	    dec	    hex	filename
 675352	   2740	  13968	 692060	  a8f5c	busybox_old
 674804	   2740	  13968	 691512	  a8d38	busybox_unstripped

diff --git a/networking/ether-wake.c b/networking/ether-wake.c
index 9de0d48..b67e1b5 100644
--- a/networking/ether-wake.c
+++ b/networking/ether-wake.c
@@ -220,8 +220,7 @@
 		struct ifreq if_hwaddr;
 
 		strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name));
-		if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) != 0)
-			bb_perror_msg_and_die("SIOCGIFHWADDR on %s failed", ifname);
+		ioctl_or_perror_and_die(s, SIOCGIFHWADDR, &if_hwaddr, "SIOCGIFHWADDR on %s failed", ifname);
 
 		memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6);
 
@@ -257,8 +256,7 @@
 	{
 		struct ifreq ifr;
 		strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-		if (ioctl(s, SIOCGIFINDEX, &ifr) != 0)
-			bb_perror_msg_and_die("SIOCGIFINDEX");
+		xioctl(s, SIOCGIFINDEX, &ifr);
 		memset(&whereto, 0, sizeof(whereto));
 		whereto.sll_family = AF_PACKET;
 		whereto.sll_ifindex = ifr.ifr_ifindex;