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find local computers



I'm reposting my previous msg with the exec included as this might make things clearer./Marty

I recently wrote a bash script to find the active ip addr's on my lan by pinging every possibility on my class C network. This works nicely, only taking about 15 seconds of wall time to complete.

The code is:

#!/bin/bash

pingEm()
{
        echo "preparing pings"
        for((i=1;i<255;i++))
        do
                echo "ping -c1 192.168.0.$i > $$/$i &" >> pingEmAll.$$
        done
        echo "start pinging"
        chmod +x pingEmAll.$$ && `./pingEmAll.$$`
}

findEm()
{
        for((i=1;i<255;i++))
        do
                awk '/64 bytes from /' $$/$i > ans
                awk '{ print length($0) }' ans > len
                if [ `more len` ]
                then
                        echo "$i is on the network"
                fi
        done
}

mkdir $$ && pingEm
findEm
rm -r $$ & rm pingEmAll.$$ ans len

echo End of story


The output looks like this:

$ ./findIps
preparing pings
start pinging
1 is on the network
3 is on the network
7 is on the network
160 is on the network
240 is on the network
End of story
$

Is there any way that I could also discover the names of each of these active network locations?


Marty Landman   Face 2 Interface Inc.   845-679-9387
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