Hi, Andrew.

 AC> I am having some problems working out how to use anonymous pipes in
 AC> EMX. 
 AC> I want to start a child process and communicate with its stdin and
 AC> stdout. I have looked at popen(), which lets me start it with a pipe
 AC> connected to stdin *or* stdout, but it doesn't seem to be what I want;
 AC> and pipe(), which creates a pipe with two handles (one for reading and
 AC> one for writing) but I can't understand how I am supposed to 'connect'
 AC> this pipe to a process. 
 AC> Can anyone help?

sorry, thats me once again :)

static int inbound[2], outbound[2];

                                         /* installiere Dateiumleitung */
    if (pipe(outbound) < 0)
        crtError("Cannot open outbound pipe for server.");
    dup2(outbound[0], STDIN_FILENO);     /* replace stdin with pipe */
    close(outbound[0]);
    fcntl(outbound[1], F_SETFD, 1);
    if (pipe(inbound) < 0)
        crtError("Cannot open inbound pipe for server.");
    dup2(inbound[1], STDOUT_FILENO);     /* replace stdout with pipe */
    close(inbound[1]);
    fcntl(inbound[0], F_SETFD, 1);

thats all. Communicating with the client works like this:

read(inbound[0], szBuf, sizeof(szBuf)); /* get from client stdout */
write(outbound[1], pszData, strlen(pszData)); /* put into client stdin*/

Eberhard Mattes uses a similar proceeding in his GNU EMACS port (file
'pmterm.c'?).

EMX has an example too (in '/emx/test/pipe.c').

cu/2 Roland

... I program like a MAN.  I use COPY CON PROGRAM.EXE    
--- Blue Wave/Max v2.12 OS/2 [NR]