path: root/source/a/pkgtools/scripts/installpkg

#!/bin/sh
# Copyright 1994, 1998, 2000  Patrick Volkerding, Concord, CA, USA 
# Copyright 2001, 2003  Slackware Linux, Inc., Concord, CA, USA
# Copyright 2007, 2009, 2011, 2017, 2018  Patrick Volkerding, Sebeka, MN, USA 
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Mon Jun  4 21:17:58 UTC 2018
# Migrate the package database and directories from /var/log to
# /var/lib/pkgtools. /var/log was never a good place for this data, as it is
# considered by many to be a directory that could be wiped to free up some
# space. Originally the package database was in /var/adm, but the FSSTND
# (later FHS) group decided that directory should be a symlink to /var/log,
# and I went along with that since it was years ago and I was a n00b and didn't
# know any better. /var/lib/pkgtools will be a better and safer location.
#
# Thu May 24 20:23:55 UTC 2018
# Added --terselength option to set the line length in --terse mode.
# Allow adding NOLOCK in an install script to allow it to run without locking.
#
# Sat May 19 22:42:03 UTC 2018
# Implement locking to prevent screen output or install script collisions if
# multiple copies of installpkg are running simultaneously.
# Use ${MCOOKIE} instead of $$ (might as well, since we already generated it).
#
# Tue Apr 17 17:26:44 UTC 2018
# Quit with the funny business in /install. Note however that /install still
# isn't a safe directory to use in a package for anything other than package
# metadata. Other files placed there are going to be left on the system in
# /installpkg-$(mcookie). That could be worked around, but we'll wait until
# someone reports there is a need. The main reason to do this is that /install
# was a collision point if more than one copy of installpkg was running at
# once. With this change, the pkgtools are (more or less) thread-safe.
#
# Tue Feb 13 01:19:46 UTC 2018
# Use recent tar, and support restoring POSIX ACLs and extended attributes.
#
# Tue Dec 12 21:49:48 UTC 2017
# If possible, use multiple decompression threads.
#
# Thu Dec  7 04:09:17 UTC 2017
# Change meaning of .tlz to tar.lz (lzip)
#
# Sun Sep  6 21:58:36 BST 2009
# Replaced usage of "cat" with STDIN redirection or file name parameters
# to speed up execution on ARM.
# Replaced pkgbase & package_name code with 'sed' script by Jim Hawkins.
#
# Sat Apr 25 21:18:53 UTC 2009
# Converted to use new pkgbase() function to remove pathname and
# valid package extensions.
#
# Sat Apr  4 22:58:06 CDT 2009
# Support additional compression formats if the supporting utilities exist:
# .tbz - bzip2
# .tlz - lzma
# .txz - xz (also LZMA)
# And of course, .tgz (gzip) is not going anywhere.  :-) <volkerdi>
# Add command switches to determine the uncompressed package size even if
# that will slow things down, and to add the package's md5sum to the
# metadata stored in /var/log/packages/.
#
# Fri Dec 21 17:21:35 CST 2007
# Added a patch from Johnny Morano to work around package removal issues
# caused by packages that do not comply with FHS combined with a grep
# regex error in installpkg.  Any package with a single-letter top-
# level directory could not be removed.
#
# Shortened some of the top-line dialog output to avoid overflowing the
# textbox (needed as some of the packages, especially in X, have very
# long base package names now).  <pjv>
#
# Sun Nov 26 12:38:25 CST 1995
# Added patch from Glenn Moloney <glenn@physics.unimelb.edu.au> to allow
# packages to be installed to directories other than /.
#
# Wed Mar 18 15:15:51 CST 1998
# Changed $TMP directory to /var/log/setup/tmp, and chmod'ed it 700 to close
# some security holes.

# Return a package name that has been stripped of the dirname portion
# and any of the valid extensions (only):
pkgbase() {
  # basename + strip extensions .tbz, .tgz, .tlz and .txz
  echo "$1" | sed 's?.*/??;s/\.t[bglx]z$//'
}

# If installpkg encounters a problem, it will return a non-zero error code.
# If it finds more than one problem (i.e. with a list of packages) you'll only
# hear about the most recent one. :)
# 1 = tar returned error code
# 2 = corrupt compression envelope
# 3 = does not end in .tgz
# 4 = no such file
# 5 = external compression utility missing
# 99 = user abort from menu mode
EXITSTATUS=0

# Do not store md5sums by default:
MD5SUM=0

# So that we know what to expect...
umask 022

# If we have mcookie and a tar that is recent enough to support --transform,
# then we can stop needlessly erasing files in the /install directory while
# also making installpkg thread-safe. Don't check for recent tar - we'll
# already break from --attrs and --xattrs anyway if the wrong tar is used.
if which mcookie 1> /dev/null 2> /dev/null ; then
  MCOOKIE=$(mcookie)
  INSTDIR=installpkg-${MCOOKIE}
else
  # Well, we will make due with this:
  MCOOKIE=$$
  INSTDIR=installpkg-${MCOOKIE}
fi

# Create a lockfile directory if it doesn't exist. We can use it to prevent
# screen corruption (from multiple dialogs) and install script collisions
# (from multiple scripts trying to work on the same files) in the case of
# parallel instances of installpkg.
INSTLOCKDIR=${INSTLOCKDIR:-/run/lock/pkgtools}
if [ ! -d $INSTLOCKDIR ]; then
  mkdir -p $INSTLOCKDIR
fi

usage() {
 cat << EOF
Usage: installpkg [options] <package_filename>

Installpkg is used to install a .t{gz,bz,lz,xz} package like this:
   installpkg slackware-package-1.0.0-i486-1.tgz (or .tbz, .tlz, .txz)

options:      --warn (warn if files will be overwritten, but do not install)
              --root /mnt (install someplace else, like /mnt)
              --infobox (use dialog to draw an info box)
              --terse (display a one-line short description for install)
              --terselength <length> (line length in terse mode - default is
                    the number of columns available)
              --menu (confirm package installation with a menu, unless
                    the priority is [required] or ADD)
              --ask (used with menu mode: always ask if a package should be
                   installed regardless of what the package's priority is)
              --priority ADD|REC|OPT|SKP (provide a priority for the entire
                    package list to use instead of the priority in the
                    tagfile)
              --tagfile /somedir/tagfile (specify a different file to use
                    for package priorities. The default is "tagfile" in
                    the package's directory)
              --threads <number>  For xz/plzip compressed packages, set the max
                    number of threads to be used for decompression. Only has
                    an effect if a multithreaded compressor was used, and then
                    only on large packages. For plzip, the default is equal to
                    the number of CPU threads available on the machine. For xz,
                    the default is equal to 2.
              --md5sum (record the package's md5sum in the metadata file)

EOF
}

# Eliminate whitespace function:
crunch() {
  while read FOO ; do
    echo $FOO
  done
}

# Strip version, architecture and build from the end of the name
package_name() {
  pkgbase $1 | sed 's?-[^-]*-[^-]*-[^-]*$??'
}

# Set maximum number of threads to use. By default, this will be the number
# of CPU threads:
THREADS="$(nproc)"

# Set default line length for terse mode:
if tty -s && which tput 1> /dev/null 2> /dev/null ; then
  TERSELENGTH=$(tput cols)
else
  TERSELENGTH=80
fi

# Default install mode is standard text mode:
MODE=install
# If $TERSE is set to 0 in the environment, then use terse mode:
if [ "$TERSE" = "0" ]; then
  MODE=terse
fi

# Parse options:
while [ 0 ]; do
  if [ "$1" = "-warn" -o "$1" = "--warn" ]; then
    MODE=warn
    shift 1
  elif [ "$1" = "-md5sum" -o "$1" = "--md5sum" ]; then
    MD5SUM=1
    shift 1
  elif [ "$1" = "-infobox" -o "$1" = "--infobox" ]; then
    MODE=infobox
    shift 1
  elif [ "$1" = "-terse" -o "$1" = "--terse" ]; then
    MODE=terse
    shift 1
  elif [ "$1" = "-terselength" -o "$1" = "--terselength" ]; then
    TERSELENGTH=$2
    shift 2
  elif [ "$1" = "-menu" -o "$1" = "--menu" ]; then
    MODE=menu
    shift 1
  elif [ "$1" = "-ask" -o "$1" = "--ask" ]; then
    ALWAYSASK="yes"
    shift 1
  elif [ "$1" = "-tagfile" -o "$1" = "--tagfile" ]; then
    if [ -r "$2" ]; then
      USERTAGFILE="$2"
    elif [ -r "$(pwd)/$2" ]; then
      USERTAGFILE="$(pwd)/$2"
    else
      usage
      exit
    fi
    shift 2
  elif [ "$1" = "-threads" -o "$1" = "--threads" ]; then
    THREADS="$2"
    shift 2
    # xz has not yet implemented multi-threaded decompression.
    # Who knows if or how well it will work...
    XZ_THREADS_FORCED=yes
  elif [ "$1" = "-priority" -o "$1" = "--priority" ]; then
    if [ "$2" = "" ]; then
      usage
      exit
    fi
    USERPRIORITY="$2"
    shift 2
  elif [ "$1" = "-root" -o "$1" = "--root" ]; then
    if [ "$2" = "" ]; then
      usage
      exit
    fi
    ROOT="$2"
    shift 2
  else
    break
  fi
done

# Set the prefix for the package database directories (packages, scripts).
ADM_DIR="$ROOT/var/lib/pkgtools"

# Set the prefix for the removed packages/scripts log files:
LOG_DIR="$ROOT/var/log/pkgtools"

# If the directories don't exist, "initialize" the package database:
for PKGDBDIR in packages scripts setup ; do
  if [ ! -d $ADM_DIR/$PKGDBDIR ]; then
    mkdir -p $ADM_DIR/$PKGDBDIR
    chmod 755 $ADM_DIR/$PKGDBDIR 
  fi
done
for PKGLOGDIR in removed_packages removed_scripts ; do
 if [ ! -d $LOG_DIR/$PKGLOGDIR ]; then
    rm -rf $LOG_DIR/$PKGLOGDIR # make sure it's not a symlink or something stupid
    mkdir -p $LOG_DIR/$PKGLOGDIR
    chmod 755 $LOG_DIR/$PKGLOGDIR
  fi
done
# Likewise, make sure that the symlinks in /var/log exist. We no longer
# trust anything to remain in /var/log. Let the admin wipe it if that's
# what they like.
for symlink in packages scripts setup ; do
  if [ ! -L $LOG_DIR/../$symlink -a ! -d $LOG_DIR/../$symlink ]; then
    ( cd $LOG_DIR/.. ; ln -sf ../lib/pkgtools/$symlink . )
  fi
done

# Make sure there's a proper temp directory:
TMP=$ADM_DIR/setup/tmp
# If the $TMP directory doesn't exist, create it:
if [ ! -d $TMP ]; then
  mkdir -p $TMP
  chmod 700 $TMP # no need to leave it open
fi

# usage(), exit if called with no arguments:
if [ $# = 0 ]; then
  usage;
  exit
fi

# If -warn mode was requested, produce the output and then exit:
if [ "$MODE" = "warn" ]; then
  while [ -f "$1" ]; do
    mkdir -p $TMP/scan${MCOOKIE}
    # Determine extension:
    packageext="$( echo $1 | rev | cut -f 1 -d . | rev)"
    # Determine decompressor utility:
    case $packageext in
    'tgz' )
      packagecompression=gzip
      ;;
    'tbz' )
      if which lbzip2 1> /dev/null 2> /dev/null ; then
        packagecompression=lbzip2
      else
        packagecompression=bzip2
      fi
      ;;
    'tlz' )
      if which plzip 1> /dev/null 2> /dev/null ; then
        packagecompression="plzip --threads=${THREADS}"
      elif which lzip 1> /dev/null 2> /dev/null ; then
        packagecompression=lzip
      else
        echo "ERROR:  lzip compression utility not found in \$PATH."
        exit 3
      fi
      ;;
    'txz' )
      if [ ! "$XZ_THREADS_FORCED" = "yes" ]; then
        packagecompression="xz --threads=${THREADS}"
      else
        packagecompression="xz --threads=2"
      fi
      ;;
    esac
    ( cd $TMP/scan${MCOOKIE} ; $packagecompression -dc | tar xf - install ) < $1 2> /dev/null 
    if [ -r $TMP/scan${MCOOKIE}/install/doinst.sh ]; then
      if grep ' rm -rf ' $TMP/scan${MCOOKIE}/install/doinst.sh 1>/dev/null 2>/dev/null ; then
        grep ' rm -rf ' $TMP/scan${MCOOKIE}/install/doinst.sh > $TMP/scan${MCOOKIE}/install/delete
	for f in `cat $TMP/scan${MCOOKIE}/install/delete | cut -f 3,7 -d ' ' | tr ' ' '/'`; do
	  f="/$f"
	  if [ -f "$f" -o -L "$f" ]; then
	    echo "$f"
	  fi
	done
      fi
      if [ -d $TMP/scan${MCOOKIE} ]; then
        ( cd $TMP/scan${MCOOKIE} ; rm -rf install ) 2> /dev/null
        ( cd $TMP ; rmdir scan${MCOOKIE} ) 2> /dev/null
      fi
    fi
    for f in `( $packagecompression -dc | tar tf - ) < $1 | grep -v 'drwx'`; do
      f="/$f"
      if [ -f "$f" -o -L "$f" ]; then
        echo "$f"
      fi
    done
    shift 1
  done
  exit
fi

# Main loop:
for package in $* ; do

  # Simple package integrity check:
  if [ ! -f $package ]; then
    EXITSTATUS=4
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package:  file not found"
    fi
    continue;
  fi

  # "shortname" isn't really THAT short...
  # it's just the full name without ".t{gz,bz,lz,xz}"
  shortname="$(pkgbase $package)"
  packagedir="$(dirname $package)"
  # This is the base package name, used for grepping tagfiles and descriptions:
  packagebase="$(package_name $shortname)"

  # Reject package if it does not end in '.t{gz,bz,lz,xz}':
  if [ "$shortname" = "$(basename $package)" ]; then
    EXITSTATUS=3
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package:  file does not end in .tgz, .tbz, .tlz, or .txz"
    fi
    continue;
  fi

  # Determine extension:
  packageext="$(echo $package | rev | cut -f 1 -d . | rev)"

  # Determine compressor utility:
  case $packageext in
  'tgz' )
    packagecompression=gzip
    ;;
  'tbz' )
    if which lbzip2 1> /dev/null 2> /dev/null ; then
      packagecompression=lbzip2
    else
      packagecompression=bzip2
    fi
    ;;
  'tlz' )
    if which plzip 1> /dev/null 2> /dev/null ; then
      packagecompression="plzip --threads=${THREADS}"
    elif which lzip 1> /dev/null 2> /dev/null ; then
      packagecompression=lzip
    else
      echo "ERROR:  lzip compression utility not found in \$PATH."
      exit 3
    fi
    ;;
  'txz' )
    if [ ! "$XZ_THREADS_FORCED" = "yes" ]; then
      packagecompression="xz --threads=${THREADS}"
    else
      packagecompression="xz --threads=2"
    fi
    ;;
  esac

  # Test presence of external compression utility:
  if ! $(echo $packagecompression | cut -f 1 -d ' ') --help 1> /dev/null 2> /dev/null ; then
    EXITSTATUS=5
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package:  external compression utility $packagecompression missing"
    fi
    continue;
  fi

  # Determine package's priority:
  unset PRIORITY
  if [ "$USERTAGFILE" = "" ]; then
    TAGFILE="$packagedir/tagfile"   
  else
    TAGFILE="$USERTAGFILE"
  fi
  if [ ! -r "$TAGFILE" ]; then
    TAGFILE=/dev/null
  fi
  if grep "^$packagebase:" "$TAGFILE" | grep ADD > /dev/null 2> /dev/null ; then
    PRIORITY="ADD"
  elif grep "^$packagebase:" "$TAGFILE" | grep REC > /dev/null 2> /dev/null ; then
    PRIORITY="REC"
  elif grep "^$packagebase:" "$TAGFILE" | grep OPT > /dev/null 2> /dev/null ; then
    PRIORITY="OPT"
  elif grep "^$packagebase:" "$TAGFILE" | grep SKP > /dev/null 2> /dev/null ; then
    PRIORITY="SKP"
  fi
  if [ "$PRIORITY" = "ADD" ]; then
    PMSG="[ADD]"
  elif [ "$PRIORITY" = "REC" ]; then
    PMSG="[REC]"
  elif [ "$PRIORITY" = "OPT" ]; then
    PMSG="[OPT]"
  elif [ "$PRIORITY" = "SKP" ]; then
    PMSG="[SKP]"
  else
    PMSG=""
  fi

  # If a tagfile wants this package to be skipped, do that now before
  # wasting any more CPU on it:
  if [ "$PRIORITY" = "SKP" -a ! "$ALWAYSASK" = "yes" ]; then
    continue # next package
  fi

  # Figure out some package information, like the compressed and uncompressed
  # sizes, and where to find the package description:
  COMPRESSED="$(/bin/du -sh "$(readlink -f $package)" | cut -f 1)"
  DESCRIPTION=""
  # First check for .txt file next to the package, since this is faster:
  if grep "^$packagebase:" "$packagedir/$shortname.txt" 1> /dev/null 2> /dev/null ; then
    DESCRIPTION="$packagedir/$shortname.txt"
  elif grep "^$shortname:" "$packagedir/$shortname.txt" 1> /dev/null 2> /dev/null ; then
    DESCRIPTION="$packagedir/$shortname.txt"
  fi

  # Test tarball integrity and get uncompressed package size:
  if [ "$MODE" = "install" ]; then
    echo "Verifying package $(basename $package)."
  fi
  # The stray cat reduces the frequency of the lack of reported size.
  # If it still fails, we hit it with a bigger hammer down below.
  cat $package | $packagecompression -dc | LC_ALL=C dd 2> $TMP/tmpsize${MCOOKIE} | cat | tar tf - 2> /dev/null 1> $TMP/tmplist${MCOOKIE}
  TARERROR=$?
  if [ ! "$TARERROR" = "0" ]; then
    EXITSTATUS=1 # tar file corrupt
    if [ "$MODE" = "install" ]; then
      echo "Unable to install $package:  tar archive is corrupt (tar returned error code $TARERROR)"
    fi
    rm -f $TMP/tmplist${MCOOKIE} $TMP/tmpsize${MCOOKIE}
    continue
  fi
  UNCOMPRESSED="$(cat $TMP/tmpsize${MCOOKIE} | tail -n 1 | cut -f 1 -d ' ' | numfmt --to=iec)"
  # Weird bug "fix". Sometimes we get no uncompressed size (this started when we
  # moved away from tar-1.13, but I don't see what that could have to do with
  # it). So, if we have no uncompressed size here, demand it in this loop.
  # Hopefully the bug is not weird enough to make this an infinite loop. :/
  while [ "$UNCOMPRESSED" = "" ]; do
    cat $package | $packagecompression -dc | LC_ALL=C dd 1> /dev/null 2> $TMP/tmpsize${MCOOKIE}
    UNCOMPRESSED="$(cat $TMP/tmpsize${MCOOKIE} | tail -n 1 | cut -f 1 -d ' ' | numfmt --to=iec)"
  done
  rm -f $TMP/tmpsize${MCOOKIE}

  # If we still don't have a package description, look inside the package.
  # This requires a costly untar.
  if [ "$DESCRIPTION" = "" ]; then
    mkdir -p $TMP/scan${MCOOKIE}
    ( cd $TMP/scan${MCOOKIE} ; $packagecompression -dc | tar xf - install ) < $package 2> /dev/null
    if grep "^$packagebase:" "$TMP/scan${MCOOKIE}/install/slack-desc" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$TMP/scan${MCOOKIE}/install/slack-desc"
    elif grep "^$shortname:" "$TMP/scan${MCOOKIE}/install/slack-desc" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$TMP/scan${MCOOKIE}/install/slack-desc"
    fi
  fi

  if [ "$DESCRIPTION" = "" ]; then
    #echo "WARNING NO SLACK-DESC"
    DESCRIPTION="/dev/null"
  fi

  # Gather package infomation into a temporary file:
  grep "^$packagebase:" $DESCRIPTION | cut -f 2- -d : | cut -b2- 1> $TMP/tmpmsg${MCOOKIE} 2> /dev/null
  if [ "$shortname" != "$packagebase" ]; then
    grep "^$shortname:" $DESCRIPTION | cut -f 2- -d : | cut -b2- 1>> $TMP/tmpmsg${MCOOKIE} 2> /dev/null
  fi
  # Adjust the length here.  This allows a slack-desc to be any size up to 13 lines instead of fixed at 11.
  LENGTH=$(wc -l < $TMP/tmpmsg${MCOOKIE} )
  while [ $LENGTH -lt 12 ]; do
    echo >> $TMP/tmpmsg${MCOOKIE}
    LENGTH=$(expr $LENGTH + 1)
  done
  echo "Size: Compressed: ${COMPRESSED}, uncompressed: ${UNCOMPRESSED}." >> $TMP/tmpmsg${MCOOKIE}
  # For recent versions of dialog it is necessary to add \n to the end of each line
  # or it will remove repeating spaces and mess up our careful formatting:
  cat << EOF > $TMP/controlns${MCOOKIE}
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
EOF
  paste -d "" $TMP/tmpmsg${MCOOKIE} $TMP/controlns${MCOOKIE} > $TMP/pasted${MCOOKIE}
  rm -f $TMP/controlns${MCOOKIE}
  mv $TMP/pasted${MCOOKIE} $TMP/tmpmsg${MCOOKIE}
  # Emit information to the console:
  if [ "$MODE" = "install" ]; then
    if [ "$PMSG" = "" ]; then
      echo "Installing package $(basename $package):"
    else
      echo "Installing package $(basename $package) $PMSG:"
    fi
    echo "PACKAGE DESCRIPTION:"
    grep "^$packagebase:" $DESCRIPTION | uniq | sed "s/^$packagebase:/#/g"
    if [ "$shortname" != "$packagebase" ]; then
      grep "^$shortname:" $DESCRIPTION | uniq | sed "s/^$shortname:/#/g"
    fi
  elif [ "$MODE" = "terse" ]; then # emit a single description line
    ( flock 9 || exit 11
      printf "%-$(expr $TERSELENGTH - 7)s %-6s\n" "$(echo $shortname: $(echo $(cat $DESCRIPTION | grep "^$packagebase:" | sed "s/^$packagebase: //g" | head -n 1 | tr -d '()' | sed "s/^$packagebase //g" ) $(echo " $(printf '.%.0s' {1..256})")) | cut -b1-$(expr $TERSELENGTH - 7))" "$(printf "[%4s]" $UNCOMPRESSED)" | cut -b 1-${TERSELENGTH}
    ) 9> $INSTLOCKDIR/dialog.lock
  elif [ "$MODE" = "infobox" ]; then # install infobox package
    ( flock 9 || exit 11
      dialog --title "Installing package $shortname $PMSG" --infobox "$(cat $TMP/tmpmsg${MCOOKIE})" 0 0
    ) 9> $INSTLOCKDIR/dialog.lock
  elif [ "$MODE" = "menu" -a "$PRIORITY" = "ADD" -a ! "$ALWAYSASK" = "yes" ]; then # ADD overrides menu mode unless -ask was used
    ( flock 9 || exit 11
      dialog --title "Installing package $shortname $PMSG" --infobox "$(cat $TMP/tmpmsg${MCOOKIE})" 0 0
    ) 9> $INSTLOCKDIR/dialog.lock
  elif [ "$MODE" = "menu" -a "$USERPRIORITY" = "ADD" ]; then # install no matter what $PRIORITY
    ( flock 9 || exit 11
      dialog --title "Installing package $shortname $PMSG" --infobox "$(cat $TMP/tmpmsg${MCOOKIE})" 0 0
    ) 9> $INSTLOCKDIR/dialog.lock
  else # we must need a full menu:
    ( flock 9 || exit 11
      dialog --title "Package Name: $shortname $PMSG" --menu "$(cat $TMP/tmpmsg${MCOOKIE})" 0 0 3 \
      "Yes" "Install package $shortname" \
      "No" "Do not install package $shortname" \
      "Quit" "Abort software installation completely" 2> $TMP/reply${MCOOKIE}
      if [ ! $? = 0 ]; then
        echo "No" > $TMP/reply${MCOOKIE}
      fi
    ) 9> $INSTLOCKDIR/dialog.lock
    REPLY="$(cat $TMP/reply${MCOOKIE})"
    rm -f $TMP/reply${MCOOKIE} $TMP/tmpmsg${MCOOKIE}
    if [ "$REPLY" = "Quit" ]; then
      exit 99 # EXIT STATUS 99 = ABORT!
    elif [ "$REPLY" = "No" ]; then
      continue # skip the package
    fi
  fi

  # Make sure there are no symbolic links sitting in the way of
  # incoming package files:
    grep -v "/$" $TMP/tmplist${MCOOKIE} | while read file ; do
    if [ -L "$ROOT/$file" ]; then
      rm -f "$ROOT/$file"
    fi
  done
  rm -f $TMP/tmplist${MCOOKIE}

  # Write the package file database entry and install the package:
  echo "PACKAGE NAME:     $shortname" > $ADM_DIR/packages/$shortname
  echo "COMPRESSED PACKAGE SIZE:     $COMPRESSED" >> $ADM_DIR/packages/$shortname
  echo "UNCOMPRESSED PACKAGE SIZE:     $UNCOMPRESSED" >> $ADM_DIR/packages/$shortname
  echo "PACKAGE LOCATION: $package" >> $ADM_DIR/packages/$shortname
  # Record the md5sum if that's a selected option:
  if [ $MD5SUM = 1 ]; then
    echo "PACKAGE MD5SUM: $(md5sum $package | cut -f 1 -d ' ')" >> $ADM_DIR/packages/$shortname
  fi
  echo "PACKAGE DESCRIPTION:" >> $ADM_DIR/packages/$shortname
  grep "^$packagebase:" $DESCRIPTION >> $ADM_DIR/packages/$shortname 2> /dev/null
  if [ "$shortname" != "$packagebase" ]; then
    grep "^$shortname:" $DESCRIPTION >> $ADM_DIR/packages/$shortname 2> /dev/null
  fi
  echo "FILE LIST:" >> $ADM_DIR/packages/$shortname
  if [ "$INSTDIR" = "install" ]; then
    ( cd $ROOT/ ; $packagecompression -dc | tar --acls --xattrs --xattrs-include='*' --keep-directory-symlink -xpvf - | LC_ALL=C sort ) < $package >> $TMP/$shortname 2> /dev/null
  else
    ( cd $ROOT/ ; $packagecompression -dc | tar --transform "s,^install$,$INSTDIR," --transform "s,^install/,$INSTDIR/," --acls --xattrs --xattrs-include='*' --keep-directory-symlink -xpvf - | LC_ALL=C sort ) < $package >> $TMP/$shortname 2> /dev/null
  fi
  if [ "$( grep '^\./' $TMP/$shortname | wc -l | tr -d ' ')" = "1" ]; then
    # Good.  We have a package that meets the Slackware spec.
    cat $TMP/$shortname >> $ADM_DIR/packages/$shortname
  else
    # Some dumb bunny built a package with something other than makepkg.  Bad!
    # Oh well.  Bound to happen.  Par for the course.  Fix it and move on...
    # We'll assume it's just a recent tar with an unfiltered filelist with all
    # files prefixed with "./". No guarantees, but this will usually work.
    cat $TMP/$shortname | sed '2,$s,^\./,,' >> $ADM_DIR/packages/$shortname
  fi
  rm -f $TMP/$shortname

  # It's a good idea to make sure those newly installed libraries are properly
  # activated for use, unless ROOT is pointing somewhere else in which case
  # running ldconfig on the host system won't make any difference:
  if [ "$ROOT" = ""  ] && [ -x /sbin/ldconfig ]; then
    ( flock 9 || exit 11
      /sbin/ldconfig 2> /dev/null
    ) 9> $INSTLOCKDIR/ldconfig.lock
  fi

  if [ -f $ROOT/$INSTDIR/doinst.sh ]; then
    if [ "$MODE" = "install" ]; then
      echo "Executing install script for $(basename $package)."
    fi
    # Don't use locking if the script contains "NOLOCK":
    if grep -q NOLOCK $ROOT/$INSTDIR/doinst.sh ; then
      # If bash is available, use sed to convert the install script to use pushd/popd
      # rather than spawning subshells which is slow on ARM.  This will also speed up
      # install script processing on any platform.
      if [ -x /bin/bash ]; then
        cd $ROOT/ ; sed -e's?^( cd \([^;]*\);\(.*\) )$?pushd \1 \&\> /dev/null ; \2 ; popd \&\> /dev/null?g ' $INSTDIR/doinst.sh | /bin/bash
      else
        cd $ROOT/ ; sh $INSTDIR/doinst.sh
      fi
    else # use locking
      # If bash is available, use sed to convert the install script to use pushd/popd
      # rather than spawning subshells which is slow on ARM.  This will also speed up
      # install script processing on any platform.
      if [ -x /bin/bash ]; then
        ( flock 9 || exit 11
          cd $ROOT/ ; sed -e's?^( cd \([^;]*\);\(.*\) )$?pushd \1 \&\> /dev/null ; \2 ; popd \&\> /dev/null?g ' $INSTDIR/doinst.sh | /bin/bash
        ) 9> $INSTLOCKDIR/doinst.sh.lock
      else
        ( flock 9 || exit 11
          cd $ROOT/ ; sh $INSTDIR/doinst.sh
        ) 9> $INSTLOCKDIR/doinst.sh.lock
      fi
    fi
  fi 
  # Clean up the mess...
  if [ -d $ROOT/$INSTDIR ]; then
    if [ -r $ROOT/$INSTDIR/doinst.sh ]; then
      cp $ROOT/$INSTDIR/doinst.sh $ADM_DIR/scripts/$shortname
      chmod 755 $ADM_DIR/scripts/$shortname
    fi
    # /install/doinst.sh and /install/slack-* are reserved locations for the package system.
    # Heh, not any more with a recent tar :-)
    ( cd $ROOT/$INSTDIR ; rm -f doinst.sh slack-* 1> /dev/null 2>&1 )
    rmdir $ROOT/$INSTDIR 1> /dev/null 2>&1
  fi
  # If we used a scan directory, get rid of it:
  if [ -d "$TMP/scan${MCOOKIE}" ]; then
    rm -rf "$TMP/scan${MCOOKIE}"
  fi
  rm -f $TMP/tmpmsg${MCOOKIE} $TMP/reply${MCOOKIE}
  if [ "$MODE" = "install" ]; then
    echo "Package $(basename $package) installed."
  fi
done

exit $EXITSTATUS