#!/bin/sh
#
# Oracle VM VirtualBox
# VirtualBox Makeself installation starter script
# for Linux Guest Additions

#
# Copyright (C) 2006-2017 Oracle Corporation
#
# This file is part of VirtualBox Open Source Edition (OSE), as
# available from http://www.virtualbox.org. This file is free software;
# you can redistribute it and/or modify it under the terms of the GNU
# General Public License (GPL) as published by the Free Software
# Foundation, in version 2 as it comes in the "COPYING" file of the
# VirtualBox OSE distribution. VirtualBox OSE is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
#

# Testing:
# * After successful installation, 0 is returned if the vboxguest module version
#   built matches the one loaded and 2 is returned otherwise.  E.g. VBoxClient
#   running will prevent vboxguest reloading.
# * If the kernel modules cannot be built (run the installer with KERN_VER=none)
#   or loaded (run with KERN_VER=<installed non-current version>) then 1 is
#   returned.

PATH=$PATH:/bin:/sbin:/usr/sbin

# Note: These variable names must *not* clash with variables in $CONFIG_DIR/$CONFIG!
PACKAGE="VBoxGuestAdditions"
PACKAGE_NAME="VirtualBox Guest Additions"
UNINSTALL="uninstall.sh"
PUBLIC_UNINSTALL_HOOK="/usr/sbin/vbox-uninstall-guest-additions"
ROUTINES="routines.sh"
INSTALLATION_VER="_VERSION_"
BUILD_TYPE="_BUILDTYPE_"
USERNAME="_USERNAME_"
UNINSTALL_SCRIPTS="vboxadd-x11 vboxvfs vboxadd-timesync vboxadd-service vboxadd"

INSTALLATION_DIR="/opt/$PACKAGE-$INSTALLATION_VER"
CONFIG_DIR="/var/lib/$PACKAGE"
CONFIG="config"
CONFIG_FILES="filelist"
SELF=$1
LOGFILE="/var/log/vboxadd-install.log"

## Were we able to stop any previously running Additions kernel modules?
MODULES_STOPPED=1

. "./$ROUTINES"

check_root

check_deps bzip2 tar

create_log "$LOGFILE"

## @todo r=andy: Explain options like "force" and "no_setup" -- not self-explanatory
#        to the user.
usage()
{
    info ""
    info "Usage: $SELF install [<installation directory>]"
    info "       [--with-<module>] |"
    info "       uninstall"
    info "       [--force] [--no-setup]"
    info ""
    info "Example:"
    info "$SELF install"
    exit 1
}

# Create a symlink in the filesystem and add it to the list of package files
add_symlink()
{
    self=add_symlink
    ## Parameters:
    # The file the link should point to
    target="$1"
    # The name of the actual symlink file.  Must be an absolute path to a
    # non-existing file in an existing directory.
    link="$2"
    link_dir="`dirname "$link"`"
    test -n "$target" ||
        { echo 1>&2 "$self: no target specified"; return 1; }
    test -d "$link_dir" ||
        { echo 1>&2 "$self: link directory $link_dir does not exist"; return 1; }
    expr "$link" : "/.*" > /dev/null ||
        { echo 1>&2 "$self: link file name is not absolute"; return 1; }
    rm -f "$link"
    ln -s "$target" "$link"
    echo "$link" >> "$CONFIG_DIR/$CONFIG_FILES"
}

# Create symbolic links targeting all files in a directory in another
# directory in the filesystem
link_into_fs()
{
    ## Parameters:
    # Directory containing the link target files
    target_branch="$1"
    # Directory to create the link files in
    directory="$2"
    for i in "$INSTALLATION_DIR/$target_branch"/*; do
        test -e "$i" &&
            add_symlink "$i" "$directory/`basename $i`"
    done
}

# Look for broken installations or installations without a known uninstaller
# and try to clean them up, asking the user first.
def_uninstall()
{
    ## Parameters:
    # Whether to force cleanup without asking the user
    force="$1"

    . ./deffiles
    found=0
    for i in "/opt/$PACKAGE-"*; do
        test -e "$i" && found=1
    done
    for i in $DEFAULT_FILE_NAMES; do
        test "$found" = 0 && test -e "$i" && found=1
    done
    test "$found" = 0 &&
        for i in $DEFAULT_VERSIONED_FILE_NAMES; do
            for j in $i-*; do
                test "$found" = 0 && test -e "$j" && found=1
            done
        done
    test "$found" = 0 && return 0
    if ! test "$1" = "force" ; then
        # Try to make the promised notification appear on next start.
        VBoxControl guestproperty delete \
            /VirtualBox/GuestAdd/HostVerLastChecked 2>&1 > /dev/null
        cat 1>&2 << EOF
This system appears to have a version of the VirtualBox Guest Additions
already installed.  If it is part of the operating system and kept up-to-date,
there is most likely no need to replace it.  If it is not up-to-date, you
should get a notification when you start the system.  If you wish to replace
it with this version, please do not continue with this installation now, but
instead remove the current version first, following the instructions for the
operating system.

If your system simply has the remains of a version of the Additions you could
not remove you should probably continue now, and these will be removed during
installation.

Do you wish to continue? [yes or no]
EOF
        read reply dummy
        if ! expr "$reply" : [yY] > /dev/null &&
            ! expr "$reply" : [yY][eE][sS] > /dev/null
        then
            info
            info "Cancelling installation."
            return 1
        fi
    fi
    # Stop what we can in the way of services and remove them from the
    # system
    for i in $UNINSTALL_SCRIPTS; do
        stop_init_script "$i" 2>> "${LOGFILE}"
        test -z "$NO_CLEANUP" && test -x "./$i" && "./$i" cleanup 1>&2 2>> "$LOGFILE"
        delrunlevel "$i" 2>> "${LOGFILE}"
        remove_init_script "$i" 2>> "${LOGFILE}"
    done
    for i in "/opt/$PACKAGE-"*/init; do
      for j in $UNINSTALL_SCRIPTS; do
        script="${i}/${j}"
        test -x "${script}" && test -z "$NO_CLEANUP" &&
          grep -q '^# *cleanup_script *$' "${script}" &&
          "${script}" cleanup 1>&2 2>> "$LOGFILE"
      done
    done

    # Get rid of any remaining files
    for i in $DEFAULT_FILE_NAMES; do
        rm -f "$i" 2> /dev/null
    done
    for i in $DEFAULT_VERSIONED_FILE_NAMES; do
        rm -f "$i-"* 2> /dev/null
    done
    rm -f "/usr/lib/$PACKAGE" "/usr/lib64/$PACKAGE" "/usr/share/$PACKAGE" \
        "/usr/lib/i386-linux-gnu/$PACKAGE" "/usr/lib/x86_64-linux-gnu/$PACKAGE"

    # And any packages left under /opt
    for i in "/opt/$PACKAGE-"*; do
        test -d "$i" && rm -rf "$i"
    done
    return 0
}

info "$PACKAGE_NAME installer"

# Check architecture
cpu=`uname -m`;
case "$cpu" in
  i[3456789]86|x86)
    cpu="x86"
    lib_candidates="/usr/lib/i386-linux-gnu /usr/lib /lib"
    ;;
  x86_64|amd64)
    cpu="amd64"
    lib_candidates="/usr/lib/x86_64-linux-gnu /usr/lib64 /usr/lib /lib64 /lib"
    ;;
  *)
    cpu="unknown"
esac
ARCH_PACKAGE="$PACKAGE-$cpu.tar.bz2"
if [ ! -r "$ARCH_PACKAGE" ]; then
  info "Detected unsupported $cpu machine type."
  exit 1
fi
# Find the most appropriate libary folder by seeing which of the candidate paths
# are actually in the shared linker path list and choosing the first.  We look
# for Debian-specific paths first, then LSB ones, then the new RedHat ones.
libs=`ldconfig -v 2>/dev/null | grep -v ^$'\t'`
for i in $lib_candidates; do
  if echo $libs | grep -q $i; then
    lib_path=$i
    break
  fi
done
if [ ! -x "$lib_path" ]; then
  info "Unable to determine correct library path."
  exit 1
fi

# Sensible default actions
ACTION="install"
DO_SETUP="true"
NO_CLEANUP=""
FORCE_UPGRADE=""

while [ $# -ge 2 ];
do
    ARG=$2
    shift

    if [ -z "$MY_END_OF_OPTIONS" ]; then
        case "$ARG" in

            install)
                ACTION="install"
                ;;

            uninstall)
                ACTION="uninstall"
                ;;

            ## @todo Add per-module options handling, e.g. --lightdm-greeter-dir
             #       or --lightdm-config

            ## @todo Add listing all available modules (+ their options, e.g.
             #       with callback mod_mymod_show_options?)

            --with-*)
                MODULE_CUR=`expr "$ARG" : '--with-\(.*\)'`
                # Check if corresponding module in installer/module-$1 exists.
                # Note: Module names may not contain spaces or other funny things.
                if [ ! -f "./installer/module-${MODULE_CUR}" ]; then
                    info "Error: Module \"${MODULE_CUR}\" does not exist."
                    usage
                fi
                # Give the module the chance of doing initialization work / checks.
                . "./installer/module-${MODULE_CUR}"
                mod_${MODULE_CUR}_init
                if test $? -ne 0; then
                    echo 1>&2 "Module '${MODULE_CUR}' failed to initialize"
                    if ! test "$FORCE_UPGRADE" = "force"; then
                        return 1
                    fi
                    # Continue initialization.
                fi
                # Add module to the list of modules to handle later.
                if test -z "${INSTALLATION_MODULES_LIST}"; then
                    INSTALLATION_MODULES_LIST="${MODULE_CUR}"
                else
                    INSTALLATION_MODULES_LIST="${INSTALLATION_MODULES_LIST} ${MODULE_CUR}"
                fi
                shift
                ;;

            --force|force) # Keep "force" for backwards compatibility.
                FORCE_UPGRADE="force"
                ;;

            --no-setup|no_setup) # Keep "no_setup" for backwards compatibility.
                DO_SETUP=""
                ;;

            --no-cleanup|no_cleanup) # Keep "no_cleanup" for backwards compatibility.
                # Do not do cleanup of old modules when removing them.  For
                # testing purposes only.
                DO_SETUP=""
                NO_CLEANUP="no_cleanup"
                ;;

            --)
                MY_END_OF_OPTIONS="1"
                ;;

            *)
                if [ "`echo $1|cut -c1`" != "/" ]; then
                    info "Please specify an absolute path"
                    usage
                fi
                INSTALLATION_DIR="$1"
                shift
                ;;
        esac
    fi
done

# uninstall any previous installation
# If the currently installed Additions have provided an uninstallation hook, try
# that first.
if test -x "${PUBLIC_UNINSTALL_HOOK}"; then
  "${PUBLIC_UNINSTALL_HOOK}" 1>&2 ||
    abort "Failed to remove existing installation.  Aborting..."
fi

INSTALL_DIR=""
uninstalled=0
test -r "$CONFIG_DIR/$CONFIG" &&
    eval `grep ^INSTALL_DIR= "$CONFIG_DIR/$CONFIG"` 2>/dev/null &&
    eval `grep ^UNINSTALLER= "$CONFIG_DIR/$CONFIG"` 2>/dev/null
if test -n "$INSTALL_DIR" -a -x "$INSTALL_DIR/$UNINSTALLER"; then
  "$INSTALL_DIR/$UNINSTALLER" $NO_CLEANUP 1>&2 ||
    abort "Failed to remove existing installation.  Aborting..."
  uninstalled=1
fi
test "$uninstalled" = 0 && def_uninstall "$FORCE_UPGRADE" && uninstalled=1
test "$uninstalled" = 0 && exit 1
rm -f "$CONFIG_DIR/$CONFIG"
rm -f "$CONFIG_DIR/$CONFIG_FILES"
rmdir "$CONFIG_DIR" 2>/dev/null
test "$ACTION" = "install" || exit 0

# Now check whether the kernel modules were stopped.
lsmod | grep -q vboxguest && MODULES_STOPPED=

# Choose a proper umask
umask 022

# Set installer modules directory
INSTALLATION_MODULES_DIR="$INSTALLATION_DIR/installer/"

# install the new version
mkdir -p -m 755 "$CONFIG_DIR"
test ! -d "$INSTALLATION_DIR" && REMOVE_INSTALLATION_DIR=1
mkdir -p -m 755 "$INSTALLATION_DIR"

# install and load installer modules
if [ -d installer ]; then
  info "Copying additional installer modules ..."
  mkdir -p -m 755 "$INSTALLATION_MODULES_DIR"
  for CUR_FILE in `ls installer/*`; do
      install -p -m 755 "$CUR_FILE" "$INSTALLATION_MODULES_DIR"
      if [ $? -ne 0 ]; then
          info "Error: Failed to copy installer module \"$CUR_FILE\""
          if ! test "$FORCE_UPGRADE" = "force"; then
              exit 1
          fi
      fi
  done
fi

# Create a list of the files in the archive, skipping any directories which
# already exist in the filesystem.
bzip2 -d -c "$ARCH_PACKAGE" | tar -tf - |
  while read name; do
    fullname="$INSTALLATION_DIR/$name"
    case "$fullname" in
      */)
        test ! -d "$fullname" &&
          echo "$fullname" >> "$CONFIG_DIR/$CONFIG_FILES"
        ;;
      *)
        echo "$fullname" >> "$CONFIG_DIR/$CONFIG_FILES"
        ;;
    esac
  done
bzip2 -d -c "$ARCH_PACKAGE" | tar -xf - -C "$INSTALLATION_DIR" || exit 1

# Set symlinks into /usr and /sbin
link_into_fs "bin" "/usr/bin"
link_into_fs "sbin" "/usr/sbin"
link_into_fs "lib" "$lib_path"
add_symlink "$INSTALLATION_DIR/lib/$PACKAGE" /usr/lib/"$PACKAGE"
link_into_fs "src" "/usr/src"

if [ -d "$INSTALLATION_MODULES_DIR" ]; then
  info "Installing additional modules ..."
  for CUR_MODULE in `find "$INSTALLATION_MODULES_DIR" 2>/dev/null`
      do
          echo "$CUR_MODULE" >> "$CONFIG_DIR/$CONFIG_FILES"
      done
fi

for CUR_MODULE in ${INSTALLATION_MODULES_LIST}
do
    mod_${CUR_MODULE}_install
    if [ $? -ne 0 ]; then
        info "Error: Failed to install module \"$CUR_MODULE\""
        if ! test "$FORCE_UPGRADE" = "force"; then
            exit 1
        fi
    fi
done

# Remember our installation configuration before we call any init scripts
cat > "$CONFIG_DIR/$CONFIG" << EOF
# $PACKAGE installation record.
# Package installation directory
INSTALL_DIR='$INSTALLATION_DIR'
# Additional installation modules
INSTALL_MODULES_DIR='$INSTALLATION_MODULES_DIR'
INSTALL_MODULES_LIST='$INSTALLATION_MODULES_LIST'
# Package uninstaller.  If you repackage this software, please make sure
# that this prints a message and returns an error so that the default
# uninstaller does not attempt to delete the files installed by your
# package.
UNINSTALLER='$UNINSTALL'
# Package version
INSTALL_VER='$INSTALLATION_VER'
# Build type and user name for logging purposes
BUILD_TYPE='$BUILD_TYPE'
USERNAME='$USERNAME'
EOF

# Give the modules the chance to write their stuff
# to the installation config as well.
if [ -n "${INSTALLATION_MODULES_LIST}" ]; then
  info "Saving modules configuration ..."
  for CUR_MODULE in ${INSTALLATION_MODULES_LIST}
  do
    echo "`mod_${CUR_MODULE}_config_save`" >> "$CONFIG_DIR/$CONFIG"
  done
fi

"$INSTALLATION_DIR/init/vboxadd" setup 1>&2 2>> "${LOGFILE}"

# Install, set up and start init scripts
for i in "$INSTALLATION_DIR/init/vboxadd" "$INSTALLATION_DIR/init/vboxadd-service"; do
    install_init_script "$i" "`basename "$i"`" 2>> "${LOGFILE}"
    addrunlevel "`basename "$i"`" 2>> "${LOGFILE}"
    start_init_script "`basename "$i"`" 2>> "${LOGFILE}"
done

cp $ROUTINES $INSTALLATION_DIR
echo $INSTALLATION_DIR/$ROUTINES >> "$CONFIG_DIR/$CONFIG_FILES"
cat > $INSTALLATION_DIR/$UNINSTALL << EOF
#!/bin/sh
# Auto-generated uninstallation file

PATH=\$PATH:/bin:/sbin:/usr/sbin
LOGFILE="/var/log/vboxadd-uninstall.log"

# Read routines.sh
if ! test -r "$INSTALLATION_DIR/$ROUTINES"; then
    echo 1>&2 "Required file $ROUTINES not found.  Aborting..."
    return 1
fi
. "$INSTALLATION_DIR/$ROUTINES"

# We need to be run as root
check_root

create_log "\$LOGFILE"

echo 1>&2 "Removing installed version $INSTALLATION_VER of $PACKAGE_NAME..."

NO_CLEANUP=""
if test "\$1" = "no_cleanup"; then
    shift
    NO_CLEANUP="no_cleanup"
fi

test -r "$CONFIG_DIR/$CONFIG_FILES" || abort "Required file $CONFIG_FILES not found.  Aborting..."

# Stop and clean up all services
for i in "$INSTALLATION_DIR/init/vboxadd-service" "$INSTALLATION_DIR/init/vboxadd"; do
    if test -r "\$i"; then
        stop_init_script "\`basename "\$i"\`" 2>> "${LOGFILE}"
        test -z "\${NO_CLEANUP}" && grep -q '^# *cleanup_script *$' "\${i}" && "\${i}" cleanup 2>> "\$LOGFILE"
        delrunlevel "\`basename "\$i"\`" 2>> "${LOGFILE}"
        remove_init_script "\`basename "\$i"\`" 2>> "${LOGFILE}"
    fi
done

# Load all modules
# Important: This needs to be done before loading the configuration
#            value below to not override values which are set to a default
#            value in the modules itself.
for CUR_MODULE in `find "$INSTALLATION_MODULES_DIR" -name "module-*" 2>/dev/null`
    do
        . "\$CUR_MODULE"
    done

# Load configuration values
test -r "$CONFIG_DIR/$CONFIG" && . "$CONFIG_DIR/$CONFIG"

# Call uninstallation initialization of all modules
for CUR_MODULE in "$INSTALLATION_MODULES_LIST"
    do
        if test -z "\$CUR_MODULE"; then
            continue
        fi
        mod_\${CUR_MODULE}_pre_uninstall
        if [ $? -ne 0 ]; then
            echo 1>&2 "Module \"\$CUR_MODULE\" failed to initialize uninstallation"
            # Continue initialization.
        fi
    done

# Call uninstallation of all modules
for CUR_MODULE in "$INSTALLATION_MODULES_LIST"
    do
        if test -z "\$CUR_MODULE"; then
            continue
        fi
        mod_\${CUR_MODULE}_uninstall
        if [ $? -ne 0 ]; then
            echo 1>&2 "Module \"\$CUR_MODULE\" failed to uninstall"
            # Continue uninstallation.
        fi
    done

# And remove all files and empty installation directories
# Remove any non-directory entries
cat "$CONFIG_DIR/$CONFIG_FILES" | xargs rm 2>/dev/null
# Remove any empty (of files) directories in the file list
cat "$CONFIG_DIR/$CONFIG_FILES" |
    while read file; do
        case "\$file" in
            */)
            test -d "\$file" &&
                find "\$file" -depth -type d -exec rmdir '{}' ';' 2>/dev/null
            ;;
        esac
    done

# Remove configuration files
rm "$CONFIG_DIR/$CONFIG_FILES" 2>/dev/null
rm "$CONFIG_DIR/$CONFIG" 2>/dev/null
rmdir "$CONFIG_DIR" 2>/dev/null
exit 0
EOF
chmod 0755 $INSTALLATION_DIR/$UNINSTALL
echo $INSTALLATION_DIR/$UNINSTALL >> "$CONFIG_DIR/$CONFIG_FILES"
test -n "$REMOVE_INSTALLATION_DIR" &&
  echo "$INSTALLATION_DIR/" >> "$CONFIG_DIR/$CONFIG_FILES"

cat > "${PUBLIC_UNINSTALL_HOOK}" << EOF
#!/bin/sh
# This executable provides a well-known way to uninstall VirtualBox Guest
# Additions in order to re-install them from a different source.  A common case
# is uninstalling distribution-provide Additions to install the version provided
# by VirtualBox.  Distributions should put the right command in here to do the
# removal, e.g. "dnf remove VirtualBox-guest-additions".  Leaving kernel modules
# provided by the distribution kernel package in place is acceptable if the
# location does not clash with the VirtualBox-provided module location (misc).
$INSTALLATION_DIR/$UNINSTALL
EOF
chmod 0755 "${PUBLIC_UNINSTALL_HOOK}"
echo "$PUBLIC_UNINSTALL_HOOK" >> "$CONFIG_DIR/$CONFIG_FILES"

# Test for a problem with old Mesa versions which stopped our 3D libraries
# from working.  Known to affect Debian 7.11, probably OL/RHEL 5.
# The problem was that the system Mesa library had an ABI note, which caused
# ldconfig to always prefer it to ours.
if ldconfig -p | grep -q "libGL.so.1.*Linux 2.4"; then
    gl_with_abi=`ldconfig -p | grep "libGL.so.1.*Linux 2.4" | sed 's/.*=> //'`
    cat >&2 << EOF
This system appears to be running a version of Mesa with a known problem
which will prevent VirtualBox 3D pass-through from working.  See
  https://bugs.freedesktop.org/show_bug.cgi?id=26663
The following, run as root should fix this, though you will have to run it
again if the system version of Mesa is updated:
EOF
    for i in ${gl_with_abi}; do
        echo >&2 "  strip -R .note.ABI-tag ${i}"
    done
    echo >&2 "  ldconfig"
fi

# And do a final test as to whether the kernel modules were properly created
# and loaded.  Return 0 if both are true, 1 if the modules could not be built
# or loaded (except due to already running older modules) and 2 if already
# running modules probably prevented new ones from loading.  vboxvideo is
# currently not tested.
# Assume that we have already printed enough messages by now and stay silent.
modinfo vboxguest >/dev/null 2>&1 || exit 1
lsmod | grep -q vboxguest || exit 1
test -n "${MODULES_STOPPED}" || exit 2
exit 0