Generator script

Shell Programming and Scripting
1

Hello again unix.com people,

I need your help again. I'm currently need a script that will generate ip ranges... lets say from 64.1.1.1 to 74.255.255.255 and the output should be like this:

64.1.1.2
64.1.1.3
.............
.............
74.255.255.254
74.255.255.255

(line-by-line)

Thank you again.

Galford D. Weller

2

Hello Galford

Any attempts from your side yet?
Where and why are you stuck?

Thank you

3

Did you search these forums as recommended? How about this one?

4

Hello sir,

I'm really a newbie and I'm stuck at a blank page (lol).

---------- Post updated at 05:20 AM ---------- Previous update was at 05:14 AM ----------

Looks nice but I dont know how to use it.

while IFS=", " read IP1 IP2
  do    BIP1=$((0x$(printf "%02X" ${64//./ })));
        BIP2=$((0x$(printf "%02X" ${74//./ })));
        for ((I=BIP1; I<=BIP2; I++))
          do printf "%d.%d.%d.%d\n" $((I>>24)) $((I>>16&255)) $((I>>8&255)) $((I&255))
          done
  done < range

When I execute it the "range" file is empty. Looks like I using it wrong or something. Like I said I am new and need a little more help. Please bear with me a little more. Thanks!

5

read reads from stdin, which you can redirect from a file ( with a structure as given in that thread ). If you don't, it reads from your keyboard; so - enter your starting and ending address.

DON'T modify the interior of the script as you did with 64 and 74 .

6

You mean like this?

./iprange 64.0.0.1 74.255.255.255

Please give me an example.

7

Run it without the stdin redirection, and then enter the limits on the command line. As given, it is made for reading from a file so it doesn't prompt.

./iprange
64.0.0.1 74.255.255.255

Please be aware that this is quite some range; mayhap you try with narrower limits.

1 Like
8

Thanks a million. You sir are a really life saver!