[Bug 370557] Re: ifdata doesn't support long device names

[Alan Pope]

Ok, to expand on my brief description.

ifdata fails with "Invalid data read, check! Error getting statistics
for wlan0" due to it looking for 17 items from /proc/net/dev/ on a line
(the wlan0 line in my system). However it also carves up the line
expecting the net device to be up to 6 characters in length (which
typically they are with eth1, wlan0 as examples). However sometimes they
are longer:-

alan at hactar:~/Development/moreutils/moreutils-0.34$ cat /proc/net/dev
Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
    lo:   11860     170    0    0    0     0          0         0    11860     170    0    0    0     0       0          0
  eth0:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
wmaster0:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
 wlan0: 4015561    7480    0    0    0     0          0         0  1157487    8080    0    0    0     0       0          0
vboxnet0:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
  pan0:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0

Note vboxnet0 and wmaster0 are both longer than 6 characters. According
to include/linux/device.h the net device name can be up to 20 characters
in length. So the patch just accommodates larger device names.

** Attachment added: "patch.txt"
   http://launchpadlibrarian.net/26231740/patch.txt

-- 
ifdata doesn't support long device names
https://bugs.launchpad.net/bugs/370557
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