This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: Bash process substitution
On Jan 23 12:07, Corinna Vinschen wrote:
> On Jan 22 18:46, Dave wrote:
> > Is process substitution expected to work in 1.7.1?
> >
> > Here's what I tried:
> >
> > kilroyd@MINIME ~
> > $ uname -a
> > CYGWIN_NT-5.1 MINIME 1.7.1(0.218/5/3) 2009-12-07 11:48 i686 Cygwin
> >
> > kilroyd@MINIME ~
> > $ echo LOG:bananas | tee file.txt
> > LOG:bananas
> >
> > kilroyd@MINIME ~
> > $ cat file.txt
> > LOG:bananas
> >
> > kilroyd@MINIME ~
> > $ echo LOG:bananas | tee >(grep "^LOG:" > file.txt)
> > LOG:bananas
> > tee: /dev/fd/63: Bad file descriptor
>
> I'm not quite sure how this command works under the hood, but it's
> possible that this can't work in Cygwin due to a restriction in
> Windows. In contrast to Unix, you can't call open(pipe_fd, O_RDONLY)
> if pipe_fd is the write side of a pipe and vice versa. If bash's
> process substitution relies on that, it's simply not possible.
> Dunno if there is a way to implement this using some hackery, of course...
Hang on, this is a EBADF. Looks like bash tries to access a file
descriptor which isn't available (anymore).
Eric, would you mind to have a look into bash to examine what's going
on here?
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple