Re: Redirection of STDERR

[vda]

On Wednesday 10 March 2004 09:50, Christoph Pleger wrote:
> Hello,
>
> > >> In my initialization scripts for hotplug (written for bash) the
> > >> following command is used to redirect output which normally goes to
> > >> stderr to the system logger:
> > >> "exec 2> >(logger -t $0[$$])"
> > >
> > > I don't remember this syntax as legal.
> >
> > That's the process substitution feature of bash, quite handy when you
> > want to get an fd connected to a pipe.
>
> I found out that the problem exists with bash 2.05b, but not with 2.05a.
> The reason is that with 2.05a the command uses the file descriptors
> under /dev/fd0 for the pipe, but with 2.05b the command creates a pipe
> under /tmp. Obviously, the 2.05b mechanism worked with Kernel 2.4, but
> not with 2.6.

I always wondered what prevents bash from NOT using
pipes in the filesystem. It does not use them for
ps | less 
and friends.
-- 
vda
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