I think everyone's assumption was that you would not "write a telnet program" but rather use a combination of fork and pipe to run "/usr/bin/telnet" and then send/recieve commands/data to telnet though the pipes you have open. If I'm now reading this right you're saying that you actually want to write a program that acts as "telnet", that is opens a socket from the current host to the telnet port on a remote host and then "speaks" the telnet protocol. If so, this is significantly more work (at least to do it right) and isn't probably something that can easily be explained over email. If this is the case then you'll need to create and fill in "sockaddr_in" structures, use "connect()", "read()", "write", and maybe even "select()" or "poll()" calls. This isn't trivial. Worse, if you really want to speak telnet protocol (you can get away with a bare TCP stream usually, but you have to ignore the extra garbage) then you'll have to dig up the protocol specs. So, what are you really after? It might help if you explain why you need to use telnet in the first place. I suspect this would probably be easier in "perl" or "expect" using their builtin pipes. Matt Fahrner Manager of Networking Burlington Coat Factory Warehouse JM wrote: > Hi, My project is to write a C-Program that telnets into a remote > machine(using fork and pipe). The parent process does all the inputs > such aslogin, passwd, execute shell scripts ... and also receive > outputs fromthe child.Awhile back, someone sent me an example of two > way pipe that createsboth parent and child which both can send and > receive data. This examplehelps a little but I still do not know how > to write a basic telnet program. Can you help? Thanks John
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