Re: printf -u "$fd"?

[Zachary Santer]

On Wed, May 22, 2024 at 12:32 AM Zachary Santer <zsanter@gmail.com> wrote:
>
> In my Rocky Linux 9.1 VM:
> $ bash --version
> GNU bash, version 5.1.8(1)-release [...]
> $ exec {fd_A}> >( cat > file_A.txt )
> $ exec {fd_B}> >( cat > file_B.txt )
> $ printf 'words\n' | tee /dev/fd/"${fd_A}" /dev/fd/"${fd_B}"
> words
> $ exec {fd_A}>&- {fd_B}>&-
> $ cat file_A.txt
> words
> $ cat file_B.txt
> words
> $ exec {fd_A}> >( tr 'w' 'W' > file_A.txt )
> $ exec {fd_B}> >( tr 'w' 'W' > file_B.txt )
> $ exec {fd_A}>&- {fd_B}>&-
> $ cat file_A.txt
> $ cat file_B.txt
> $

Yes, I missed a line there, several times actually, and then pasted that here.

$ exec {fd_A}> >( cat > file_A.txt )
$ exec {fd_B}> >( cat > file_B.txt )
$ printf 'words\n' | tee /dev/fd/"${fd_A}" /dev/fd/"${fd_B}"
words
$ exec {fd_A}>&- {fd_B}>&-
$ cat file_A.txt
words
$ cat file_B.txt
words
$ exec {fd_A}> >( tr 'w' 'W' > file_A.txt )
$ exec {fd_B}> >( tr 'w' 'W' > file_B.txt )
$ printf 'words\n' | tee /dev/fd/"${fd_A}" /dev/fd/"${fd_B}"
words
$ exec {fd_A}>&- {fd_B}>&-
$ cat file_A.txt
Words
$ cat file_B.txt
Words

I should really sit on these emails more often.