Ed Toro

Hi,

I have used the /dev/tcp/hostip/port constructs in bash to get banner strings from servers and such but have not found a good way to do two-way communication.

This is pretty easy to implement in other languages like TCL but I have not found a way to do it in bash. What I want is to the be able to "echo" things into a socket and be able to "read" things from a socket. I'm sure it can all be done with file descriptor handling but I can't come up with the proper syntax.

Thanks.

Ed Toro

Kinda lame to reply to my own post but this always happens to me. I search a bunch of time for an answer, post requesting some help, keep searching and then find the answer. I post it here so that anyone searching here will find it:

from:
http://advbash.activeventure.net/devref1.html


relevant example:

bash$ exec 5<>/dev/tcp/www.slashdot.org/80
bash$ echo -e "GET / HTTP/1.0\n" >&5
bash$ cat <&5

Infinite Recursion

Thanks for letting us know of the solution.

__________________
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"There are a thousand hacking at the branches of evil to one who is striking at the root."

Cerulean

Well, be a little careful with that. It's not available on Debian-based systems' BASH builds. You should probably be using netcat.