Hi,

on OpenWrt I try to find out about visible wifi-networks by parsing the output of iw scan.

This output looks like this:

BSS <blah blah>
   SSID: <ssid>
   <blah blah>
BSS <and so on>

[download]
What I am interested in is the set of all ssids, each being contained in a stanza that starts with "BSS" and ends when the next "BSS" is encountered.

So I parse it like this: 

my $out = qx| sudo iw dev wlan0 scan |;
$out .= "\nBSS";

my @chunks = $out =~ /^(BSS.*?)(?=^BSS)/smg;

my @essids = map { /SSID: (.*?)$/ms; $1 } @chunks;

[download]
And that works, but it bugs me that I manually add a "synthetic" BSS to the output of iw so I can then use a lookahead in the regex that would also match on the last entry.

So I wonder: Is there a more elegant way to do this?

Many thanks!

In reply to more elegant way to parse this? by morgon

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