modules.d/30convertfs/convertfs.sh

   1 #!/bin/bash
   2
   3 ROOT="$1"
   4
   5 if [[ ! -d "$ROOT" ]]; then
   6     echo "Usage: $0 <rootdir>"
   7     exit 1
   8 fi
   9
  10 if [[ "$ROOT" -ef / ]]; then
  11     echo "Can't convert the running system."
  12     echo "Please boot with 'rd.convertfs' on the kernel command line,"
  13     echo "to update with the help of the initramfs,"
  14     echo "or run this script from a rescue system."
  15     exit 1
  16 fi
  17
  18 while [[ "$ROOT" != "${ROOT%/}" ]]; do
  19     ROOT=${ROOT%/}
  20 done
  21
  22 if [ ! -L $ROOT/var/run -a -e $ROOT/var/run ]; then
  23     echo "Converting /var/run to symlink"
  24     mv -f $ROOT/var/run $ROOT/var/run.runmove~
  25     ln -sfn ../run $ROOT/var/run
  26 fi
  27
  28 if [ ! -L $ROOT/var/lock -a -e $ROOT/var/lock ]; then
  29     echo "Converting /var/lock to symlink"
  30     mv -f $ROOT/var/lock $ROOT/var/lock.lockmove~
  31     ln -sfn ../run/lock $ROOT/var/lock
  32 fi
  33
  34 needconvert() {
  35     for dir in "$ROOT/bin" "$ROOT/sbin" "$ROOT/lib" "$ROOT/lib64"; do
  36         if [[ -e "$dir" ]]; then
  37             [[ -L "$dir" ]] || return 0
  38         fi
  39     done
  40     return 1
  41 }
  42
  43 if ! [ -e "$ROOT/usr/bin" ]; then
  44     echo "$ROOT/usr/bin does not exist!"
  45     echo "Make sure, the kernel command line has enough information"
  46     echo "to mount /usr (man dracut.cmdline)"
  47     exit 1
  48 fi
  49
  50
  51 if ! needconvert; then
  52     echo "Your system is already converted."
  53     exit 0
  54 fi
  55
  56 testfile="$ROOT/.usrmovecheck$$"
  57 rm -f -- "$testfile"
  58 > "$testfile"
  59 if [[ ! -e "$testfile" ]]; then
  60     echo "Cannot write to $ROOT/"
  61     exit 1
  62 fi
  63 rm -f -- "$testfile"
  64
  65 testfile="$ROOT/usr/.usrmovecheck$$"
  66 rm -f -- "$testfile"
  67 > "$testfile"
  68 if [[ ! -e "$testfile" ]]; then
  69     echo "Cannot write to $ROOT/usr/"
  70     exit 1
  71 fi
  72 rm -f -- "$testfile"
  73
  74 find_mount() {
  75     local dev mnt etc wanted_dev
  76     wanted_dev="$(readlink -e -q $1)"
  77     while read dev mnt etc || [ -n "$dev" ]; do
  78         [ "$dev" = "$wanted_dev" ] && echo "$dev" && return 0
  79     done < /proc/mounts
  80     return 1
  81 }
  82
  83 # usage: ismounted <mountpoint>
  84 # usage: ismounted /dev/<device>
  85 if command -v findmnt >/dev/null; then
  86     ismounted() {
  87         findmnt "$1" > /dev/null 2>&1
  88     }
  89 else
  90     ismounted() {
  91         if [ -b "$1" ]; then
  92             find_mount "$1" > /dev/null && return 0
  93             return 1
  94         fi
  95
  96         while read a m a || [ -n "$m" ]; do
  97             [ "$m" = "$1" ] && return 0
  98         done < /proc/mounts
  99         return 1
 100     }
 101 fi
 102
 103 # clean up after ourselves no matter how we die.
 104 cleanup() {
 105     echo "Something failed. Move back to the original state"
 106     for dir in "$ROOT/bin" "$ROOT/sbin" "$ROOT/lib" "$ROOT/lib64" \
 107         "$ROOT/usr/bin" "$ROOT/usr/sbin" "$ROOT/usr/lib" \
 108         "$ROOT/usr/lib64"; do
 109         [[ -d "${dir}.usrmove-new" ]] && rm -fr -- "${dir}.usrmove-new"
 110         if [[ -d "${dir}.usrmove-old" ]]; then
 111             mv "$dir" "${dir}.del~"
 112             mv "${dir}.usrmove-old" "$dir"
 113             rm -fr -- "${dir}.del~"
 114         fi
 115     done
 116 }
 117
 118 trap 'ret=$?; [[ $ret -ne 0 ]] && cleanup;exit $ret;' EXIT
 119 trap 'exit 1;' SIGINT
 120
 121 ismounted "$ROOT/usr" || CP_HARDLINK="-l"
 122
 123 set -e
 124
 125 # merge / and /usr in new dir in /usr
 126 for dir in bin sbin lib lib64; do
 127     rm -rf -- "$ROOT/usr/${dir}.usrmove-new"
 128     [[ -L "$ROOT/$dir" ]] && continue
 129     [[ -d "$ROOT/$dir" ]] || continue
 130     echo "Make a copy of \`$ROOT/usr/$dir'."
 131     [[ -d "$ROOT/usr/$dir" ]] \
 132         && cp -ax -l "$ROOT/usr/$dir" "$ROOT/usr/${dir}.usrmove-new"
 133     echo "Merge the copy with \`$ROOT/$dir'."
 134     [[ -d "$ROOT/usr/${dir}.usrmove-new" ]] \
 135         || mkdir -p "$ROOT/usr/${dir}.usrmove-new"
 136     cp -axT $CP_HARDLINK --backup --suffix=.usrmove~ "$ROOT/$dir" "$ROOT/usr/${dir}.usrmove-new"
 137     echo "Clean up duplicates in \`$ROOT/usr/$dir'."
 138     # delete all symlinks that have been backed up
 139     find "$ROOT/usr/${dir}.usrmove-new" -type l -name '*.usrmove~' -delete || :
 140     # replace symlink with backed up binary
 141     find "$ROOT/usr/${dir}.usrmove-new" \
 142         -name '*.usrmove~' \
 143         -type f \
 144         -exec bash -c 'p="{}";o=${p%%%%.usrmove~};
 145                        [[ -L "$o" ]] && mv -f "$p" "$o"' ';' || :
 146 done
 147 # switch over merged dirs in /usr
 148 for dir in bin sbin lib lib64; do
 149     [[ -d "$ROOT/usr/${dir}.usrmove-new" ]] || continue
 150     echo "Switch to new \`$ROOT/usr/$dir'."
 151     rm -fr -- "$ROOT/usr/${dir}.usrmove-old"
 152     mv "$ROOT/usr/$dir" "$ROOT/usr/${dir}.usrmove-old"
 153     mv "$ROOT/usr/${dir}.usrmove-new" "$ROOT/usr/$dir"
 154 done
 155
 156 # replace dirs in / with links to /usr
 157 for dir in bin sbin lib lib64; do
 158     [[ -L "$ROOT/$dir" ]] && continue
 159     [[ -d "$ROOT/$dir" ]] || continue
 160     echo "Create \`$ROOT/$dir' symlink."
 161     rm -fr -- "$ROOT/${dir}.usrmove-old" || :
 162     mv "$ROOT/$dir" "$ROOT/${dir}.usrmove-old"
 163     ln -sfn usr/$dir "$ROOT/$dir"
 164 done
 165
 166 echo "Clean up backup files."
 167 # everything seems to work; cleanup
 168 for dir in bin sbin lib lib64; do
 169      # if we get killed in the middle of "rm -rf", ensure not to leave
 170      # an incomplete directory, which is moved back by cleanup()
 171     [[ -d "$ROOT/usr/${dir}.usrmove-old" ]] \
 172         && mv "$ROOT/usr/${dir}.usrmove-old" "$ROOT/usr/${dir}.usrmove-old~"
 173     [[ -d "$ROOT/${dir}.usrmove-old" ]] \
 174         && mv "$ROOT/${dir}.usrmove-old" "$ROOT/${dir}.usrmove-old~"
 175 done
 176
 177 for dir in bin sbin lib lib64; do
 178     [[ -d "$ROOT/usr/${dir}.usrmove-old~" ]] \
 179         && rm -rf -- "$ROOT/usr/${dir}.usrmove-old~" || :
 180     [[ -d "$ROOT/${dir}.usrmove-old~" ]] \
 181         && rm -rf -- "$ROOT/${dir}.usrmove-old~" || :
 182 done
 183
 184 for dir in lib lib64; do
 185     [[ -d "$ROOT/$dir" ]] || continue
 186     for lib in "$ROOT"/usr/${dir}/lib*.so*.usrmove~; do
 187         [[ -f $lib ]] || continue
 188         mv $lib ${lib/.so/_so}
 189     done
 190 done
 191
 192 set +e
 193
 194 echo "Run ldconfig."
 195 ldconfig -r "$ROOT"
 196
 197 . $ROOT/etc/selinux/config
 198 if [ -n "$(command -v setfiles)" ] && [ "$SELINUX" != "disabled" ] && [ -f /etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts ]; then
 199     echo "Fixing SELinux labels"
 200     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 || :
 201 fi
 202
 203 echo "Done."
 204 exit 0