# This hook copies busybox binary into the initramfs directory
# and creates all necessary links to it.
# It should be placed last into the hooks directory, in order to
# not overwrite commands which are provided by other means.
prereqs) echo ""; exit 0;;
BB_BIN=/usr/lib/initramfs-tools/bin/busybox
[ n = "$BUSYBOX" ] && exit 0
[ -r /usr/share/initramfs-tools/hook-functions ] || exit 0
. /usr/share/initramfs-tools/hook-functions
if [ -f $DESTDIR/bin/sh ] && cmp -s $DESTDIR/bin/sh $BB_BIN ; then
# initramfs copies busybox into /bin/sh, undo this
rm -f $DESTDIR/bin/busybox # for compatibility with old initramfs
copy_exec $BB_BIN /bin/busybox
for alias in $($BB_BIN --list-long); do
# strip leading /usr, we don't use it
usr/*) alias="${alias#usr/}" ;;
*) alias="bin/$alias" ;; # make it into /bin
# Busybox is configured to prefer its own applets, so remove
# duplication from klibc.
if [ -e "$DESTDIR/$alias" ] && cmp -s "/usr/lib/klibc/bin/$name" "$DESTDIR/$alias"; then
[ "${verbose}" = "y" ] && echo "Preferring busybox $alias over klibc" || true