Revision: elho-tools--main--0--patch-55
Archive: elho@elho.net--elho-debian
Creator: Elmar Hoffmann <elho@elho.net>
Date: Sat Nov 21 18:27:49 CET 2020
Standard-date: 2020-11-21 17:27:49 GMT
Modified-files: shell-tools
New-patches: elho@elho.net--elho-debian/elho-tools--main--0--patch-55
Summary: workaround $(trap) being executed in a subshell

Keywords: 

While POSIX mandates as a special case that shells do not execute $(trap)
in a subshell, some (e.g. dash) unfortunately violate this, thus renderng
the typical var=$(trap) idiom useless due to always evaluating to an empty
result.
This implements a workaround using a temporary file for the trap output that
is removed ASAP while in use to minimize the chance of it being left around
in case of error or interruption.