hi, someone knows if that can be done?

...some parameter for xterm (or another X terminal) to make it to redirect his stdin to the process that's running (and stdout)?

thanx.

I can't stat what you intend to do.

What is this piped cat doing anyway?

Keep one thing in mind: Each terminal is a separate shell, with it's own env variables.

What does it mean "Redirecting the STDIN to a process"?
AFAIK that's exactly what the STDIN does, pass arguments or data to an interactive process and STDOUT is until changed the shell where it runs.

Could you please be more explicit so we can help?

i mean:

launch program A and its output goes through a pipe to another program running in another xterm ( to see both programs talking)

The easiest way to do it would be with named pipes.

man 1 mkfifo
man 3 mkfifo

Have one process write to the fifo, have the other read it, and then delete it when done.

this is more or less what you need

Where '0666' is the mode. You can also use symbolic notation such as +rw or even set the user as with a normal file.

Now all you need to do is redirecting the STDOUT of the first program to fifo01:

and read it from the second console (for example with cat):

if you would like a more elegant interface (and you are using KDE) I would give Kommander a look, it enables you to create GUIs for shell script in any scripting language (but specially bash), it's quite straightforward and to connect two shells you only have to use the mouse.

thanx. i asked cause i must think a homework to show usage of pipes, and i wished to show two programs talking and not need to use graphical libraries.