forked from pool/compat-usrmerge
Ludwig Nussel
1f3c20915a
- Fix logic for detecting conflicts with directories (boo#1191111) - exit file triggers early if alread usrmerged OBS-URL: https://build.opensuse.org/request/show/923734 OBS-URL: https://build.opensuse.org/package/show/Base:System/compat-usrmerge?expand=0&rev=23
140 lines
4.1 KiB
Bash
140 lines
4.1 KiB
Bash
#!/bin/bash
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# based on code from dracut convertfs.sh
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ROOT=
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is_usrmerged() {
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local r=1
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for dir in bin sbin lib lib64; do
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[ -d "$ROOT/$dir" ] || continue
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[ -L "$ROOT/$dir" ] || return 1
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r=0
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done
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return "$r"
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}
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# check if there's anything to do
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is_usrmerged && exit 0
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# the package is installed with AutoReq off, so no guarantee that
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# coreutils actually works
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if ! { cp --help && find --help; } > /dev/null; then
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echo "tools not functional, exit"
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exit 1
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fi
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# clean up after ourselves no matter how we die.
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cleanup() {
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echo "UsrMerge conversion failed, cleaning up"
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for dir in bin sbin lib lib64; do
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rm -rf -- "$ROOT/usr/${dir}.usrmerge"
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done
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echo "!!! ATTENTION: Do NOT proceed if you see this message during"
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echo "!!! distribution upgrade. Chances are high that your system might"
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echo "!!! break beyond repair if you do."
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}
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trap 'ret=$?; [[ $ret -ne 0 ]] && cleanup;exit $ret;' EXIT
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trap 'exit 1;' SIGINT
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set -e
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if [ "$(stat -f -c %T "${ROOT:-/}")" = "overlayfs" ]; then
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echo "UsrMerge conversion does not work on overlayfs"
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exit 1
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fi
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CP_HARDLINK="-l"
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while read dev mp other; do
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[ "$mp" = "$ROOT/usr" ] && CP_HARDLINK=""
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for dir in bin sbin lib lib64; do
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[ -d "$ROOT/$dir" ] || continue
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if [ "${mp#$ROOT/$dir}" != "$mp" ] || [ "${mp#$ROOT/usr/$dir}" != "$mp" ]; then
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echo "Please unmount $mp before the conversion"
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exit 1
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fi
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done
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done < /proc/mounts
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# merge / and /usr in new dir in /usr
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for dir in bin sbin lib lib64; do
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rm -rf -- "$ROOT/usr/${dir}.usrmerge"
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[[ -L "$ROOT/$dir" ]] && continue
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[[ -d "$ROOT/$dir" ]] || continue
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echo "Make a copy of \`$ROOT/$dir'."
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[[ -d "$ROOT/$dir" ]] \
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&& cp -ax $CP_HARDLINK "$ROOT/$dir" "$ROOT/usr/${dir}.usrmerge"
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# cp can't handle copying a dir over non-directories. So move
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# those away in advance. Happened with /lib/udev existing as
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# link on older distros
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while read d; do
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f="$ROOT/usr/$dir.usrmerge/$d"
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if test -L "$f" -o \( -e "$f" -a ! -d "$f" \); then
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echo "Warning: /$dir/$d conflicts with directory /usr/$dir/$d and will be removed"
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rm -rf "$f.usrmerge~"
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mv "$f" "$f.usrmerge~"
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fi
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done < <(find "$ROOT/usr/$dir" -xdev -type d -printf "%P\n" )
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echo "Merge the copy with \`$ROOT/usr/$dir'."
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[[ -d "$ROOT/usr/${dir}.usrmerge" ]] \
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|| mkdir -p "$ROOT/usr/${dir}.usrmerge"
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cp -axT -l --backup --suffix=.usrmerge~ "$ROOT/usr/$dir" "$ROOT/usr/${dir}.usrmerge"
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echo "Clean up duplicates in \`$ROOT/usr/$dir'."
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# delete all symlinks that have been backed up. /usr versions
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# override / ones
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find "$ROOT/usr/${dir}.usrmerge" -xdev -type l -name '*.usrmerge~' -delete || :
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# in rare cases the symlinks may point from /usr to /, so remove
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# the link in that case
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while read file; do
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o=${file%%.usrmerge~}
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[ -L "$o" ] && mv -f "$file" "$o"
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done < <(find "$ROOT/usr/${dir}.usrmerge" \
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-xdev -name '*.usrmerge~' -type f)
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done
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# switch over merged dirs in /usr
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for dir in bin sbin lib lib64; do
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if [ -d "$ROOT/usr/${dir}.usrmerge" ]; then
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echo "Switch to new \`$ROOT/usr/$dir'."
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/usr/libexec/xmv "$ROOT/usr/${dir}.usrmerge" "$ROOT/usr/$dir"
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fi
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done
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# replace dirs in / with links to /usr
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for dir in bin sbin lib lib64; do
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if [ ! -L "$ROOT/$dir" -a -d "$ROOT/$dir" ]; then
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echo "Create \`$ROOT/$dir' symlink."
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rm --one-file-system -rf "$ROOT/${dir}.usrmerge" || :
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ln -s usr/$dir "$ROOT/${dir}.usrmerge"
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/usr/libexec/xmv "$ROOT/$dir" "$ROOT/${dir}.usrmerge"
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fi
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done
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echo "Clean up backup files."
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# everything seems to work; cleanup
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for dir in bin sbin lib lib64; do
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for pfx in usr/ /; do
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# if we get killed in the middle of "rm -rf", ensure not to leave
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# an incomplete directory, which is moved back by cleanup()
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d="$ROOT/${pfx}${dir}.usrmerge"
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if [ -d "$d" ]; then
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echo "$d ..."
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mv "$d" "$d~"
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rm --one-file-system -rf "$d~"
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fi
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done
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done
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# XXX: confirm this is needed
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for dir in lib lib64; do
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[[ -d "$ROOT/$dir" ]] || continue
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for lib in "$ROOT"/usr/${dir}/lib*.so*.usrmerge~; do
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[[ -f $lib ]] || continue
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mv -v $lib ${lib/.so/_so}
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done
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done
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set +e
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echo "Run ldconfig."
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ldconfig -r "$ROOT" || :
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