process substitution to create a virtual file doesn't work in chroot environment

[Cedric Blancher]

On Mon, 28 Aug 2023 at 00:14, Cary Lewis via Cygwin <cygwin@cygwin.com> wrote:
>
> In a cygwin process that is started either from mintty or bash directly the
> following:
>
> $ user=234
>
> $ ./cat <(echo $user)
> 234
> works as expected.
>
> But after a chroot:
>
> $ chroot . ./bash
> user=234
> $  ./cat <(echo $user)
> ./cat: /dev/fd/63: No such file or directory
>
> In the directory I am chrooting in, I created a tmp folder, as well as
> proc, proc/self, and proc/self/fd, and a dev directory.

Can you strace -f the bash process to see what happens? How does ls -l
/dev/ look like?

Ced

--
Cedric Blancher <cedric.blancher@gmail.com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur