Mail Archives: cygwin/2002/12/11/14:01:37
Max, Cary,
One nit. See below.
At 10:21 2002-12-11, Max Bowsher wrote:
>Cary Lewis <clewis AT mobilecom DOT com> wrote:
>
> > I have an existing unix application that makes extensive use of named
> pipes:
> >
> > mknod pipe p
> >
> > and shell scripts and 'C' programs that read and write pipes.
> > Messages must be read in order that they were written to pipe. As
> > well many processes must be able to write to a pipe and not have
> > their messages intermingled.
> >
> > Does anyone have a solution for this for cygwin?
>
>Unix named pipes / FIFOs haven't been implemented for Cygwin. No one has
>got around to it.
>
> > Any help would be appreciated.
> >
> > NOTE: The pipes don't have to be named (I can handle that separately).
>
>I don't believe there is any way to have multiple processes write to an
>anonymous pipe.
They can if they have a process inheritance relationship whereby a
descriptor to the pipe (or socket or plain file) was inherited.
> > BTW the other posix emulators like Interix now SFU and MKS support
> > these kinds of pipes, so it should be easy right?
>
>As I said above, no one has gotten round to it.
>
> > How does the /dev/ttyX file work.
>
>Cygwin notices access to certain 'files' and does clever things with them.
>For more detail: "Use the source, Luke!".
>
> > In a bash window I can echo hello
> >> /dev/tty or /dev/ttyM, where M is my tty, and I get hello on my screen,
> >> but I can't echo hello >/dev/ttyN where N is another terminal, I get
> > /dev/ttyN invalid argument.
>
>Strange - works for me.
>
>Max.
Randall Schulz
Mountain View, CA USA
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