Hi, Rudy.

-=> Rudy Oppers spaketh unto All <=-

 RO> Does anyone know if it is possible to hook the input and output from
 RO> one program to the output and input from an other program?   Maybe
 RO> with a pipe or something like that? I am new to OS/2 programming
 RO> (MS-DOS and Amiga untill now :), so I don't know much about it...

You could probably do it with named pipes -- DosCreateNPipe and so on --
but I couldn't realy advise you on that as I don't know much about it.
However, if your compiler supports them, you could use Unix-style anonymous
pipes.

The popen() command starts a child process with its input connected to the
parent's output, *or* its ouput connected to the parent's input, but not
both. To use both directions, you need to use pipe() to create a 'double'
pipe with two handles, then you can use fork() and exec() to start a
process connected to the pipe. That's how I understand it anyway.

A couple of people have sent me some suggestions and code on this subject
over the past few days, see if you can find any of them.

One last thing; if you intend to use this with PM programs, you have to
remember that the stdin and stdout for a PM program isn't what is read from
the keyboard/displayed to the screen. stdin and stdout are by default
connected to null devices, but could be used for communication with other
programs, logging to a file, or whatever if redirected.

Andrew.

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