On 12-25-14 11:20:01 Robert Moskowitz wrote:
> information. Try it when there are a few APs around, then try and pick
> out the couple of lines each per AP you want. I suppose I could pipe
> the output into something that would look for like Channel, ESSID, and
> Quality, but I am not good at writing regular expressions to put into
> grep, say.
Aw, it's not that hard. You just want to pick out any line with one
of several words in it. Good old grep(1) will do it no problem. I
suppressed stderr from the iwlist(8) command so the error message
about interface lo doesn't show up. Also, the original grep(1)
command doesn't allow for alternation (|), so I use grep -E or egrep:
$ iwlist scan 2>/dev/null|egrep 'Channel|Quality|ESSID|Cell'
Cell 01 - Address: 00:30:BD:93:E9:2C
Channel:4
Frequency:2.427 GHz (Channel 4)
Quality=53/70 Signal level=-57 dBm
ESSID:"vfr"
Cell 02 - Address: EC:1A:59:07:3D:46
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=32/70 Signal level=-78 dBm
ESSID:"belkin.d46"
$
It looks like substituting "Frequency" for "Channel" will eliminate a
line of output without losing what you say you want on each AP.
--
Garry T. Williams
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