Re: [Help-bash] stdout and stderr to two different process substitutions

[Bob Proulx]

Pierre Gaston wrote:
> > Now, I want to tee stderr to a file but I also want to see the stderr
> > output on the screen. Obviously, the following do not work. Could let
> > me know if there is a way to show stderr on the screen as well as
> > saving it to a file? Thanks!
> >
> > prog > >(gzip > xxx.gz) 2> >(tee > yyy.txt)
> >
> One way :
> { prog > >(gzip > xxx.gz) 2> >(tee yyy.txt >&3) ; } 3>&2

That will work.  Good deal.  But the extra redirection through fd 3
and the extra list wrap { ... ;} isn't needed.  Simply redirect to 2
from tee directly and then it is done.

 $ prog > >(gzip > xx.gz) 2> >(tee yy 1>&2)

Test case:
 $ { echo STDOUT ; echo STDERR 1>&2 ;} > >(gzip > xx.gz) 2> >(tee yy 1>&2)

Bob