#!/bin/sh
# Copyright 1994, 1998, 2000  Patrick Volkerding, Concord, CA, USA 
# Copyright 2001, 2003  Slackware Linux, Inc., Concord, CA, USA
# Copyright 2007  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.
#
# 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.

# 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 = failed 'gzip -l package'
# 3 = does not end in .tgz
# 4 = not a file
# 99 = user abort from menu mode
EXITSTATUS=0

# So that we know what to expect...
umask 022
TAR=tar-1.13
$TAR --help 1> /dev/null 2> /dev/null
if [ ! $? = 0 ]; then
  TAR=tar
fi
if [ ! "`LC_MESSAGES=C $TAR --version`" = "tar (GNU tar) 1.13

Copyright (C) 1988, 92,93,94,95,96,97,98, 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by John Gilmore and Jay Fenlason." ]; then
  echo "WARNING: pkgtools are unstable with tar > 1.13."
  echo "         You should provide a \"tar-1.13\" in your \$PATH."
  sleep 5
fi

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

Installpkg is used to install a .tgz package like this:
   installpkg xf_bin.tgz

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)
              -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)

EOF
}

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

package_name() {
  STRING=`basename $1 .tgz`
  # Check for old style package name with one segment:
  if [ "`echo $STRING | cut -f 1 -d -`" = "`echo $STRING | cut -f 2 -d -`" ]; then
    echo $STRING
  else # has more than one dash delimited segment
    # Count number of segments:
    INDEX=1
    while [ ! "`echo $STRING | cut -f $INDEX -d -`" = "" ]; do
      INDEX=`expr $INDEX + 1`
    done
    INDEX=`expr $INDEX - 1` # don't include the null value
    # If we don't have four segments, return the old-style (or out of spec) package name:
    if [ "$INDEX" = "2" -o "$INDEX" = "3" ]; then
      echo $STRING
    else # we have four or more segments, so we'll consider this a new-style name:
      NAME=`expr $INDEX - 3`
      NAME="`echo $STRING | cut -f 1-$NAME -d -`"
      echo $NAME
      # cruft for later ;)
      #VER=`expr $INDEX - 2`
      #VER="`echo $STRING | cut -f $VER -d -`"
      #ARCH=`expr $INDEX - 1`
      #ARCH="`echo $STRING | cut -f $ARCH -d -`"
      #BUILD="`echo $STRING | cut -f $INDEX -d -`"
    fi
  fi
}

# Parse options:
MODE=install # standard text-mode
while [ 0 ]; do
  if [ "$1" = "-warn" ]; then
    MODE=warn
    shift 1
  elif [ "$1" = "-infobox" ]; then
    MODE=infobox
    shift 1
  elif [ "$1" = "-menu" ]; then
    MODE=menu
    shift 1
  elif [ "$1" = "-ask" ]; then
    ALWAYSASK="yes"
    shift 1
  elif [ "$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" = "-priority" ]; then
    if [ "$2" = "" ]; then
      usage
      exit
    fi
    USERPRIORITY="$2"
    shift 2
  elif [ "$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/log"
# If the directories don't exist, "initialize" the package database:
for PKGDBDIR in packages removed_packages removed_scripts scripts setup ; do
  if [ ! -d $ADM_DIR/$PKGDBDIR ]; then
    rm -rf $ADM_DIR/$PKGDBDIR # make sure it's not a symlink or something stupid
    mkdir -p $ADM_DIR/$PKGDBDIR
    chmod 755 $ADM_DIR/$PKGDBDIR 
  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
  rm -rf $TMP # make sure it's not a symlink or something stupid
  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
    echo "#### Scanning the contents of $1..."
    mkdir -p $TMP/scan$$
    ( cd $TMP/scan$$ ; $TAR xzf - install ) < $1 2> /dev/null 
    if [ -r $TMP/scan$$/install/doinst.sh ]; then
      if cat $TMP/scan$$/install/doinst.sh | grep ' rm -rf ' 1>/dev/null 2>/dev/null ; then
        cat $TMP/scan$$/install/doinst.sh | grep ' rm -rf ' > $TMP/scan$$/install/delete
        echo "The following locations will be completely WIPED OUT to allow symbolic"
        echo "links to be made. (We're talking 'rm -rf') These locations may be files,"
        echo "or entire directories.  Be sure you've backed up anything at these"
        echo "locations that you want to save before you install this package:"
        cat $TMP/scan$$/install/delete | cut -f 3,7 -d ' ' | tr ' ' '/'
      fi
      if [ -d $TMP/scan$$ ]; then
        ( cd $TMP/scan$$ ; rm -rf install ) 2> /dev/null
        ( cd $TMP ; rmdir scan$$ ) 2> /dev/null
      fi
    fi
    echo "The following files will be overwritten when installing this package."
    echo "Be sure they aren't important before you install this package:"
    ( $TAR tzvvf - ) < $1 | grep -v 'drwx'
    echo
    shift 1
  done
  exit
fi

# Main loop:
for package in $* ; do

  # If someone left off the .tgz, try to figure that out:
  if [ ! -r "$package" -a -r "$package.tgz" ]; then
    package=$package.tgz
  fi

  # "shortname" isn't really THAT short... it's just the full name without ".tgz"
  shortname="`basename $package .tgz`"
  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 '.tgz':
  if [ ! -r "`dirname $package`/$shortname.tgz" ]; then
    EXITSTATUS=3
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package: package does not end in .tgz"
    fi
    continue;
  fi

  # Determine package's priority:
  unset PRIORITY
  if [ "$USERTAGFILE" = "" ]; then
    TAGFILE="`dirname $package`/tagfile"   
  else
    TAGFILE="$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

  # Locate package description file:
  DESCRIPTION="/dev/null"
  # First check the usual locations outside the package, since this is faster:
  for file in $packagedir/disk* $packagedir/package_descriptions $packagedir/$shortname.txt $packagedir/$packagebase.txt ; do
    if grep "^$packagebase:" "$file" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$file"
    elif grep "^$shortname:" "$file" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$file"
    fi
  done
  # If we still don't have anything, look inside the package.  This requires a costly untar.
  if [ "$DESCRIPTION" = "/dev/null" ]; then
    mkdir -p $TMP/scan$$
    ( cd $TMP/scan$$ ; $TAR xzf - install ) < $package 2> /dev/null
    if grep "^$packagebase:" "$TMP/scan$$/install/slack-desc" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$TMP/scan$$/install/slack-desc"
    elif grep "^$shortname:" "$TMP/scan$$/install/slack-desc" 1> /dev/null 2> /dev/null ; then
      DESCRIPTION="$TMP/scan$$/install/slack-desc"
    fi
  fi

  # Simple package integrity check:
  if [ ! -f $package ]; then
    EXITSTATUS=4
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package: package is not a regular file"
    fi
    continue;
  fi
  gzip -l $package 1> /dev/null 2> /dev/null
  if [ ! "$?" = "0" ]; then
    EXITSTATUS=2 # failed gzip -l
    if [ "$MODE" = "install" ]; then
      echo "Cannot install $package: package is corrupt (failed 'gzip -l $package')"
    fi
    continue;
  fi

  # Collect the package information into a temp file:
  COMPRESSED=`gzip -l $package | grep -v uncompressed_name | crunch | cut -f 1 -d ' '`
  UNCOMPRESSED=`gzip -l $package | grep -v uncompressed_name | crunch | cut -f 2 -d ' '`
  COMPRESSED="`expr $COMPRESSED / 1024` K"
  UNCOMPRESSED="`expr $UNCOMPRESSED / 1024` K"
#  MD5SUM=`md5sum $package | cut -f 1 -d ' '`
  cat $DESCRIPTION | grep "^$packagebase:" | cut -f 2- -d : | cut -b2- 1> $TMP/tmpmsg$$ 2> /dev/null
  if [ "$shortname" != "$packagebase" ]; then
    cat $DESCRIPTION | grep "^$shortname:" | cut -f 2- -d : | cut -b2- 1>> $TMP/tmpmsg$$ 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=`cat $TMP/tmpmsg$$ | wc -l`
  while [ $LENGTH -lt 12 ]; do
    echo >> $TMP/tmpmsg$$
    LENGTH=`expr $LENGTH + 1`
  done
  echo "Size: Compressed: $COMPRESSED, uncompressed: $UNCOMPRESSED." >> $TMP/tmpmsg$$
  # For recent versions of dialog it is necessary to add \n to the end of each line
  # or it will remove repeating spaces and mess up our careful formatting:
  cat << EOF > $TMP/controlns$$
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
EOF
  paste -d "" $TMP/tmpmsg$$ $TMP/controlns$$ > $TMP/pasted$$
  rm -f $TMP/controlns$$
  mv $TMP/pasted$$ $TMP/tmpmsg$$
  # Emit information to the console:
  if [ "$MODE" = "install" ]; then
    if [ "$PMSG" = "" ]; then
      echo "Installing package $shortname... "
    else
      echo "Installing package $shortname ($PMSG)... "
    fi
    echo "PACKAGE DESCRIPTION:"
    cat $DESCRIPTION | grep "^$packagebase:" | uniq
    if [ "$shortname" != "$packagebase" ]; then
      cat $DESCRIPTION | grep "^$shortname:" | uniq
    fi
  elif [ "$MODE" = "infobox" -a ! "$PRIORITY" = "SKP" ]; then # install non-SKP infobox package
    dialog --title "Installing package $shortname $PMSG" --infobox "`cat $TMP/tmpmsg$$`" 0 0
  elif [ "$MODE" = "menu" -a "$PRIORITY" = "ADD" -a ! "$ALWAYSASK" = "yes" ]; then # ADD overrides menu mode unless -ask was used
    dialog --title "Installing package $shortname $PMSG" --infobox "`cat $TMP/tmpmsg$$`" 0 0
  elif [ "$MODE" = "menu" -a "$USERPRIORITY" = "ADD" ]; then # install no matter what $PRIORITY
    dialog --title "Installing package $shortname $PMSG" --infobox "`cat $TMP/tmpmsg$$`" 0 0
  elif [ "$MODE" = "menu" -a "$PRIORITY" = "SKP" -a ! "$ALWAYSASK" = "yes" ]; then # SKP overrides menu mode unless -ask used
    rm -f $TMP/tmpmsg$$
    continue # next package
  elif [ "$MODE" = "infobox" -a "$PRIORITY" = "SKP" -a ! "$ALWAYSASK" = "yes" ]; then # SKP overrides infobox mode, too
    rm -f $TMP/tmpmsg$$
    continue
  else # we must need a full menu:
    dialog --title "Package Name: $shortname $PMSG" --menu "`cat $TMP/tmpmsg$$`" 0 0 3 \
    "Yes" "Install package $shortname" \
    "No" "Do not install package $shortname" \
    "Quit" "Abort software installation completely" 2> $TMP/reply$$
    if [ ! $? = 0 ]; then
      echo "No" > $TMP/reply$$
    fi
    REPLY="`cat $TMP/reply$$`"
    rm -f $TMP/reply$$ $TMP/tmpmsg$$
    if [ "$REPLY" = "Quit" ]; then
      exit 99 # EXIT STATUS 99 = ABORT!
    elif [ "$REPLY" = "No" ]; then
      continue # skip the package
    fi
  fi

  # Test tarball integrity, and make sure we're not installing files on top of existing symbolic links:
  $TAR tzf $package 1> $TMP/tmplist$$ 2> /dev/null
  TARERROR=$?
  if [ ! "$TARERROR" = "0" ]; then
    EXITSTATUS=1 # tar file corrupt
    if [ "$MODE" = "install" ]; then
      echo "Unable to install $package: tar archive is corrupt (tar returned error code $TARERROR)"
    fi
    rm -f $TMP/tmplist$$
    continue
  fi
  cat $TMP/tmplist$$ | grep -v "/$" | while read file ; do
    if [ -L "$ROOT/$file" ]; then
      rm -f "$ROOT/$file"
    fi
  done
  rm -f $TMP/tmplist$$

  # 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
#  echo "PACKAGE MD5SUM: $MD5SUM" >> $ADM_DIR/packages/$shortname
  echo "PACKAGE DESCRIPTION:" >> $ADM_DIR/packages/$shortname
  cat $DESCRIPTION | grep "^$packagebase:" >> $ADM_DIR/packages/$shortname 2> /dev/null
  if [ "$shortname" != "$packagebase" ]; then
    cat $DESCRIPTION | grep "^$shortname:" >> $ADM_DIR/packages/$shortname 2> /dev/null
  fi
  echo "FILE LIST:" >> $ADM_DIR/packages/$shortname
  ( cd $ROOT/ ; $TAR -xzlUpvf - ) < $package >> $TMP/$shortname 2> /dev/null
  if [ "`cat $TMP/$shortname | grep '^\./' | 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...
    echo './' >> $ADM_DIR/packages/$shortname
    cat $TMP/$shortname | grep -v '^./$' | cut -b3- >> $ADM_DIR/packages/$shortname
  fi
  rm -f $TMP/$shortname

  if [ -x /sbin/ldconfig ]; then
    /sbin/ldconfig
  fi
  if [ -f $ROOT/install/doinst.sh ]; then
    if [ "$MODE" = "install" ]; then
      echo "Executing install script for $shortname..."
    fi
    ( cd $ROOT/ ; sh install/doinst.sh -install; )
  fi 
  # Clean up the mess...
  if [ -d $ROOT/install ]; then
    if [ -r $ROOT/install/doinst.sh ]; then
      cp $ROOT/install/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.
    ( cd $ROOT/install ; rm -f doinst.sh slack-* 1> /dev/null 2>&1 )
    rmdir $ROOT/install 1> /dev/null 2>&1
  fi
  # If we used a scan directory, get rid of it:
  if [ -d "$TMP/scan$$" ]; then
    rm -rf "$TMP/scan$$"
  fi
  rm -f $TMP/tmpmsg$$ $TMP/reply$$
  if [ "$MODE" = "install" ]; then
    echo
  fi
done

exit $EXITSTATUS