grep [options] <[pattern]> <[file]...>

[ -b, --bsn ]              - Search in bsn
[ -e, --exports ]          - Search in exports
[ -h, --headers <string>* ] - Set header(s) to search, can be wildcarded. The
                            default is all headers (*).
[ -i, --imports ]          - Search in imports

biz.aQute.bnd (master)$ bnd grep -h "*" "settings" generated/*.jar
            generated/biz.aQute.bnd.jar :      Private-Package ...ute.lib.[settings]...