1 2${SH} -c 'echo `echo .BA"DCODE.` 3echo ".BAD"CODE.' 2>&1 | grep -q BADCODE && exit 1 4echo '`"`' | ${SH} -n 2>/dev/null && exit 1 5echo '`'"'"'`' | ${SH} -n 2>/dev/null && exit 1 6exit 0 7