source: vendor/bash/3.1/examples/obashdb/bashdb

# kshdb - Korn Shell Debugger main file
# adapted from 'Learning the Korn Shell' by Bill Rosenblatt (O'Reilly)
# by Cigy Cyriac (cigy@felix.tulblr.unisys.com)
# Main driver: constructs full script (with preamble) and runs it

echo 'Bourne-Again Shell Debugger version 0.1'

_pname=${0##*/}

[ $# -eq 0 ] && {
        echo "${_pname}: usage: ${_pname} <script_file>"
        exit 1
}

_guineapig=$1

[ -r $_guineapig ] || {
        echo "${_pname}: cannot read $_guineapig." >&2
        exit 1
}
shift

_tmpdir=/tmp
_libdir=.
_dbgfile=$_tmpdir/bashdb$$              #temp file for script being debugged

cat $_libdir/bashdb.pre $_guineapig > $_dbgfile
if [ -f "$BASH" ]; then
        exec $BASH $_dbgfile $_guineapig $_tmpdir $_libdir "$@"
else
        exec bash $_dbgfile $_guineapig $_tmpdir $_libdir "$@"
fi
# end of bashdb