Netcat problem - please help

Hello,

I'm trying to write a simple ftp-talk script using netcat.
Now what I want to do is to make netcat wait for '220 FTP Server ready.' and
send USER (whatever) than wait for '331 Pass req...' send PASS (whatever)
and so on.... Can somebody tell me how such a script suppose to look and how
to pipe it thru netcat? I've tried to do that for 5 hours but I'm running
out of ideas ;)

The best way is to make such a script that recognizes only the code of
server message (for '220 FTP Server ready' it wopuld recognize only first
three digits -> 220 ) Because the greetings and server messages are
different for every server.

TiA:)

Best regards,
Peter

Piotrek <red.guy@gazeta.pl> wrote:
> Hello,
>
> I'm trying to write a simple ftp-talk script using netcat.
> Now what I want to do is to make netcat wait for '220 FTP Server ready.' and
> send USER (whatever) than wait for '331 Pass req...' send PASS (whatever)
> and so on.... Can somebody tell me how such a script suppose to look and how
> to pipe it thru netcat? I've tried to do that for 5 hours but I'm running
> out of ideas ;)
>
> The best way is to make such a script that recognizes only the code of
> server message (for '220 FTP Server ready' it wopuld recognize only first
> three digits -> 220 ) Because the greetings and server messages are
> different for every server.

Try Bash shell's TCP support, ie. /dev/tcp/ftpserver/21. You'll be
playing with file descriptors anyways, whether you use shell or netcat.

--
William Park, Open Geometry Consulting, <opengeometry@yahoo.ca>
Linux solution for data processing and document management.

> Try Bash shell's TCP support, ie. /dev/tcp/ftpserver/21. You'll be
> playing with file descriptors anyways, whether you use shell or netcat.

Thanks but I must really do it with netcat. It's my homework :)

"Piotrek" <red.guy@gazeta.pl> writes:

> I'm trying to write a simple ftp-talk script using netcat.
> Now what I want to do is to make netcat wait for '220 FTP Server ready.' and
> send USER (whatever) than wait for '331 Pass req...' send PASS (whatever)
> and so on.... Can somebody tell me how such a script suppose to look and how
> to pipe it thru netcat? I've tried to do that for 5 hours but I'm running
> out of ideas ;)

The good thing is that you are patient. :-)

Anyways, did you check out nc(1) and look for the -e switch? Is
it available for you?

Vilmos

> The good thing is that you are patient. :-)
>
> Anyways, did you check out nc(1) and look for the -e switch? Is
> it available for you?

No, it's not :(
The only thing that I can do is

(sleep 10
echo USER blah
sleep 5
echo PASS blahblah) | nc -vv somehost 21

But it's kind of dumb :(