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#!/bin/bash
ROOT="$1"
if [[ ! -d "$ROOT" ]]; then
echo "Usage: $0 <rootdir>"
exit 1
fi
if [[ "$ROOT" -ef / ]]; then
echo "Can't convert the running system."
echo "Please boot with 'rd.convertfs' on the kernel command line,"
echo "to update with the help of the initramfs,"
echo "or run this script from a rescue system."
exit 1
fi
while [[ "$ROOT" != "${ROOT%/}" ]]; do
ROOT=${ROOT%/}
done
if [ ! -L $ROOT/var/run -a -e $ROOT/var/run ]; then
echo "Converting /var/run to symlink"
mv -f $ROOT/var/run $ROOT/var/run.runmove~
ln -sfn ../run $ROOT/var/run
fi
if [ ! -L $ROOT/var/lock -a -e $ROOT/var/lock ]; then
echo "Converting /var/lock to symlink"
mv -f $ROOT/var/lock $ROOT/var/lock.lockmove~
ln -sfn ../run/lock $ROOT/var/lock
fi
needconvert() {
for dir in "$ROOT/bin" "$ROOT/sbin" "$ROOT/lib" "$ROOT/lib64"; do
if [[ -e "$dir" ]]; then
[[ -L "$dir" ]] || return 0
fi
done
return 1
}
if ! [ -e "$ROOT/usr/bin" ]; then
echo "$ROOT/usr/bin does not exist!"
echo "Make sure, the kernel command line has enough information"
echo "to mount /usr (man dracut.cmdline)"
exit 1
fi
if ! needconvert; then
echo "Your system is already converted."
exit 0
fi
testfile="$ROOT/.usrmovecheck$$"
rm -f -- "$testfile"
> "$testfile"
if [[ ! -e "$testfile" ]]; then
echo "Cannot write to $ROOT/"
exit 1
fi
rm -f -- "$testfile"
testfile="$ROOT/usr/.usrmovecheck$$"
rm -f -- "$testfile"
> "$testfile"
if [[ ! -e "$testfile" ]]; then
echo "Cannot write to $ROOT/usr/"
exit 1
fi
rm -f -- "$testfile"
find_mount() {
local dev mnt etc wanted_dev
wanted_dev="$(readlink -e -q $1)"
while read dev mnt etc || [ -n "$dev" ]; do
[ "$dev" = "$wanted_dev" ] && echo "$dev" && return 0
done < /proc/mounts
return 1
}
# usage: ismounted <mountpoint>
# usage: ismounted /dev/<device>
if command -v findmnt >/dev/null; then
ismounted() {
findmnt "$1" > /dev/null 2>&1
}
else
ismounted() {
if [ -b "$1" ]; then
find_mount "$1" > /dev/null && return 0
return 1
fi
while read a m a || [ -n "$m" ]; do
[ "$m" = "$1" ] && return 0
done < /proc/mounts
return 1
}
fi
# clean up after ourselves no matter how we die.
cleanup() {
echo "Something failed. Move back to the original state"
for dir in "$ROOT/bin" "$ROOT/sbin" "$ROOT/lib" "$ROOT/lib64" \
"$ROOT/usr/bin" "$ROOT/usr/sbin" "$ROOT/usr/lib" \
"$ROOT/usr/lib64"; do
[[ -d "${dir}.usrmove-new" ]] && rm -fr -- "${dir}.usrmove-new"
if [[ -d "${dir}.usrmove-old" ]]; then
mv "$dir" "${dir}.del~"
mv "${dir}.usrmove-old" "$dir"
rm -fr -- "${dir}.del~"
fi
done
}
trap 'ret=$?; [[ $ret -ne 0 ]] && cleanup;exit $ret;' EXIT
trap 'exit 1;' SIGINT
ismounted "$ROOT/usr" || CP_HARDLINK="-l"
set -e
# merge / and /usr in new dir in /usr
for dir in bin sbin lib lib64; do
rm -rf -- "$ROOT/usr/${dir}.usrmove-new"
[[ -L "$ROOT/$dir" ]] && continue
[[ -d "$ROOT/$dir" ]] || continue
echo "Make a copy of \`$ROOT/usr/$dir'."
[[ -d "$ROOT/usr/$dir" ]] \
&& cp -ax -l "$ROOT/usr/$dir" "$ROOT/usr/${dir}.usrmove-new"
echo "Merge the copy with \`$ROOT/$dir'."
[[ -d "$ROOT/usr/${dir}.usrmove-new" ]] \
|| mkdir -p "$ROOT/usr/${dir}.usrmove-new"
cp -axT $CP_HARDLINK --backup --suffix=.usrmove~ "$ROOT/$dir" "$ROOT/usr/${dir}.usrmove-new"
echo "Clean up duplicates in \`$ROOT/usr/$dir'."
# delete all symlinks that have been backed up
find "$ROOT/usr/${dir}.usrmove-new" -type l -name '*.usrmove~' -delete || :
# replace symlink with backed up binary
find "$ROOT/usr/${dir}.usrmove-new" \
-name '*.usrmove~' \
-type f \
-exec bash -c 'p="{}";o=${p%%%%.usrmove~};
[[ -L "$o" ]] && mv -f "$p" "$o"' ';' || :
done
# switch over merged dirs in /usr
for dir in bin sbin lib lib64; do
[[ -d "$ROOT/usr/${dir}.usrmove-new" ]] || continue
echo "Switch to new \`$ROOT/usr/$dir'."
rm -fr -- "$ROOT/usr/${dir}.usrmove-old"
mv "$ROOT/usr/$dir" "$ROOT/usr/${dir}.usrmove-old"
mv "$ROOT/usr/${dir}.usrmove-new" "$ROOT/usr/$dir"
done
# replace dirs in / with links to /usr
for dir in bin sbin lib lib64; do
[[ -L "$ROOT/$dir" ]] && continue
[[ -d "$ROOT/$dir" ]] || continue
echo "Create \`$ROOT/$dir' symlink."
rm -fr -- "$ROOT/${dir}.usrmove-old" || :
mv "$ROOT/$dir" "$ROOT/${dir}.usrmove-old"
ln -sfn usr/$dir "$ROOT/$dir"
done
echo "Clean up backup files."
# everything seems to work; cleanup
for dir in bin sbin lib lib64; do
# if we get killed in the middle of "rm -rf", ensure not to leave
# an incomplete directory, which is moved back by cleanup()
[[ -d "$ROOT/usr/${dir}.usrmove-old" ]] \
&& mv "$ROOT/usr/${dir}.usrmove-old" "$ROOT/usr/${dir}.usrmove-old~"
[[ -d "$ROOT/${dir}.usrmove-old" ]] \
&& mv "$ROOT/${dir}.usrmove-old" "$ROOT/${dir}.usrmove-old~"
done
for dir in bin sbin lib lib64; do
[[ -d "$ROOT/usr/${dir}.usrmove-old~" ]] \
&& rm -rf -- "$ROOT/usr/${dir}.usrmove-old~" || :
[[ -d "$ROOT/${dir}.usrmove-old~" ]] \
&& rm -rf -- "$ROOT/${dir}.usrmove-old~" || :
done
for dir in lib lib64; do
[[ -d "$ROOT/$dir" ]] || continue
for lib in "$ROOT"/usr/${dir}/lib*.so*.usrmove~; do
[[ -f $lib ]] || continue
mv $lib ${lib/.so/_so}
done
done
set +e
echo "Run ldconfig."
ldconfig -r "$ROOT"
. $ROOT/etc/selinux/config
if [ -n "$(command -v setfiles)" ] && [ "$SELINUX" != "disabled" ] && [ -f /etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts ]; then
echo "Fixing SELinux labels"
setfiles -r $ROOT -p /etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts $ROOT/sbin $ROOT/bin $ROOT/lib $ROOT/lib64 $ROOT/usr/lib $ROOT/usr/lib64 $ROOT/etc/ld.so.cache $ROOT/var/cache/ldconfig || :
fi
echo "Done."
exit 0
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