Shell Programming and Scripting

please help for the following task...

I have to extract the mac address & IP address from the file1:

...
0100004512EEF4 03 192.168.0.7 192.168.0.1 -1 ...
0100779hF5D212 03 192.168.0.8 192.168.0.1 -1 ...
0100789lF5D212 03 192.168.0.9 192.168.0.1 -1 ...
...

change the format (addidng colon) and insert into file 2

...
host {
hardware ethernet 00:00:45:12:EE:F4;
fixed-address 192.168.0.7;
}

host {
hardware ethernet 00:77:9h:F52:12;
fixed-address 192.168.0.8;
}
...

please tell me how I can exact the data and change the format and insert into another file, thanks!

nawk -f fredao.awk file1

fredao.awk:

Code:

{
   gsub("..", "&:",$1)
   gsub(":$", "",$1)

   printf("host {\nhardware ethernet %s;\nfixed-address %s;\n}\n", $1, $3)
}

Code:

sed "s/..\(..\)\(..\)\(..\)\(..\)\(..\)\(..\)....\([^ ]*\).*/host {\\
hardware ethernet \1:\2:\3:\4:\5:\6;\\
fixed-address \7;\\
}/w file2" file

there seems to be a little problem, as I ONLY want to extract the first and 3rd field for each line.

Python alternative

Code:

#!/usr/bin/python
o = open("file2.txt","a")
for line in open("input.txt"):
 	splitted = line.split()
 	mac, ip = splitted[0] , splitted[2]
 	out = """
 	host {
		hardware ethernet %s;
		fixed-address %s;
	      }
 	""" %(mac,ip)
 	o.write(out + "\n")
o.close()

My enviroment doesn't have nawk, can this be done with awk? thanks!

wouldn't hurt tryin'......