generate modified builtins

translucent.bash

#!/bin/bash
shopt -s extglob lastpipe expand_aliases
shopt -u assoc_expand_once
BASH_COMPAT=51
typeset -a bool=([1]=)

function unset2 { command unset "$@"; }

function mkTranslucentFunctions {
	typeset -a builtins
	typeset func
	compgen -A builtin | mapfile -t builtins
	alias 'function=function '

	for func in "${builtins[@]}"; do
		alias "tfunc=t${func}"
		. /proc/self/fd/3 3<<-\EOF
		function tfunc { fn= command ${bool[1${fn+-1}]+'eval'} unset2 -v fn \; "${FUNCNAME#t}" '"$@"' '&&' return "$?"; }
		EOF
	done

	unalias function
}

mkTranslucentFunctions
#typeset -fp
tfalse; echo "$?"
(exit 2); ttrue; echo "$?"
(exit 3); techo 1 2 3; echo "$?"
(exit 4); tprintf -v fn '%s ' "${BASH_COMMAND}:" 1 2 3; echo "${fn}${?}"

# vim: set ft=bash fenc=utf-8 ff=unix ts=4 noet :