Cant create a nested shells in bash beyond the Child shell using coproc command and process list...

"${COPROC[0]}"/"${COPROC[1]}": Bad file descriptor...

client using coproc does not exit...

Bash: Mutual interaction of processes via pipes...

indirect bash command execution not working as expected with coproc...

bash coproc and leftover coproc output...

Background process redirect to COPROC...

How to add shell commands while executing psql in shellscript...

Start and Stop Process in Bash Script...

Nested coprocess variable in bash...

Alternatives to coproc and sub-process redirection (Bash 3)...

Line buffering in a bash coproc...

How to use 'coproc' to interact with another command driven program...

bash coproc - unexpected behavior...

More coproc questions...