Re: How to print the actual command for BASH_COMMAND in trap?

[Koichi Murase]

2021年6月13日(日) 22:08 Peng Yu <pengyu.ut@gmail.com>:
>
> OK. If there is no way to show BASH_COMMAND as the actual commands run
> in trap, then I want to know it is in trap so that I can just ignore
> BASH_COMMAND. Is there a way to test whether it is in trap or not?
> Thanks.

I guess you want to detect whether the DEBUG target is in another trap
handler or not from inside the DEBUG trap handlers? Hmm, I don't have
an idea. What I can come up with now is an ugly hack something like

trap '{ false; exec {flag_trap}>&-; flag_trap=; } {flag_trap}> /dev/null' EXIT
trap '[[ ! $flag_trap ]] && declare -p BASH_COMMAND' DEBUG
true

--
Koichi