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Frank Murphy 02-09-2012 06:04 PM

( Long Post) Yum and Fedora 16 -- focus on "new/moved filesystems"
 
On 09/02/12 18:53, Joe Zeff wrote:

On 02/09/2012 10:34 AM, Frank Murphy wrote:

On 09/02/12 18:30, Joe Zeff wrote:

One question, though: will there be a way to

recover the disk space used by the now-redundant directories?


Just 4 symlinks are left?



It wasn't clear to me if everything in the old directories was deleted
or not before being replaced with the symlinks. After all, one way to do
it would be to move /bin to /oldbin before creating the link,



Here you go *Not in Order* just first at hand.
These are for the "yum update" path
these have been superceded with the /convertfs since:

3 files make up the script
--------------------------

#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

if getargbool 0 rd.usrmove; then
if getargbool 0 rd.debug; then
bash -x usrmove-convert "$NEWROOT" 2>&1 | vinfo
else
usrmove-convert "$NEWROOT" 2>&1 | vinfo
fi
fi
------------------------------------------------------
#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

check() {
[[ $mount_needs ]] && return 1
return 255
}

depends() {
return 0
}

install() {
dracut_install bash
dracut_install find ldconfig mv rm cp ln
inst_hook pre-pivot 99 "$moddir/do-usrmove.sh"
inst "$moddir/usrmove-convert.sh" /usr/bin/usrmove-convert
}

---------------------------------------------------------
#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

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 'usrmove' 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

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 ! 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"

ismounted() {
while read a m a; do
[[ "$m" = "$1" ]] && return 0
done < /proc/mounts
return 1
}

# 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 $CP_HARDLINK "$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 -rf "$ROOT/${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 "$ROOT"
echo "Set autorelabel flag."
> "$ROOT/.autorelabel"
echo "Done."
exit 0
---------------------------------------------------------------



--
Regards,

Frank Murphy, friend of fedoraproject
UTF_8 Encoded
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