Contents of /trunk/Mix/Install

#!/bin/sh
# Mixmaster version 3  --  (C) 1999 Anonymizer Inc.

# Mixmaster may be redistributed and modified under certain conditions.
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
# ANY KIND, either express or implied. See the file COPYRIGHT for
# details.

# $Id: Install,v 1.12 2002/08/26 22:53:40 rabbi Exp $

#whereis program default-path
whereis()
{
  #echo "Looking for $1..."
  found=""
  for i in $* `which $1 2>&1`
  do
    if [ -f "$i" -a -x "$i" ]
    then
      found=$i
    fi
  done
  if [ "$found" = "" ]
  then
    found=$2
#    echo "$1 not found. Using $found."
#  else
#    echo "$1 is at $found."
  fi
}

if echo -n | grep n >/dev/null
then
 echo1=""
 echo2="\c"
else
 echo1="-n"
 echo2=""
fi

# readln text default
readln()
{
  echo $echo1 "$1 [$2] $echo2"
  read ans
  if [ -z "$ans" ]
  then
    ans="$2"
  fi
}

# findlib libxxx.a -- find and configure libraries
#    Input:
#       $1       library name
#       $CONFIG  library configure options
#       $INCDIR  possible include directories
#       $SRCDIR  possible library source directories
#       $LIBDIR  possible library binary directories
#
#    Output:
#       $found   library directory
#       $lib     library name
#       $INCDIR  include directory if required, empty otherwise
#       $LDFLAG  linker options
#       $LIB     path to library file
#       $MAKELIB Makefile entry to compile library
findlib()
{
 lib=$1
 libso=`echo $lib | sed 's/\.a$/.so/'`
 echo "Looking for $lib..."

 found=
 source=
 type=
 LIB=
 LDFLAG=
 MAKELIB=

 for i in /usr/local/lib /usr/lib /lib
 do
  if [ -r $i/$lib -o -r $i/$libso ]
  then
   found=$i
   type=system
  fi
 done

 for i in $LIBDIR
 do
  if [ -r $i/$lib -o -r $i/$libso ]
  then
   found=$i
   type=installed
  fi
 done

 for i in $SRCDIR
 do
  if [ -r $i/$lib -o -r $i/lib/$lib ]
  then
   found=$i
   type=binary
  fi
 done

 if [ -r "$found/$libso" ]
 then
  echo "Found at $found/$libso."
 elif [ -r "$found/$lib" ]
 then
  echo "Found at $found/$lib."
 elif [ -r "$found/lib/$lib" ]
 then
  echo "Found at $found/lib/$lib."
 fi

 for i in $SRCDIR
 do
  if [ -d $i -a ! "$type" = binary ]
  then
   source=$i
  fi
 done

 if [ "$source" != "" ]
 then
  echo "Found source directory $source."
  if [ "$found" = "" ]
  then 
   ans=y
  else
   echo "Use the source if the pre-installed library causes compilation problems."
   readln "Use source?" n
  fi
  if [ "$ans" = "y" ]
  then
   found=$source
   type=source
  fi
 fi

 if [ "$found" = "" ]
 then
  echo "Not found."
 fi

 if [ -r $found/lib/$lib ]
 then
  LIB=$found/lib/$lib
 else
  LIB=$found/$lib
 fi
 if [ "$type" = system ]
 then
  LIB=
  LDFLAG=-l`echo $lib | sed 's/^lib//;s/\.a$//'`
 fi

 incdir=$INCDIR
 INCDIR=
 for i in $incdir
 do
  if [ -d $i ]
  then
   INCDIR=$i
  fi
 done

 if [ "$type" = source -o "$type" = binary ]
 then
  if [ ! -r $found/lib/$lib ]
  then
   MAKELIB="$found/$lib:
        cd $found; make $lib"
  fi
  if [ -d $found/include ]
  then
   INCDIR=$found/include
  else
   INCDIR=$found
  fi
 fi

 if [ "$type" = source ]
 then
  dir=`pwd`
  if [ "$dir" = "" ]
  then
   dir=$PWD
  fi

  cd $found
  if [ -x configure ]
  then
   echo "Configuring..."
   ./configure $CONFIG
  fi
  if [ "$lib" = "libcrypto.a" ]
  then
   if [ -f config ]
   then
    sh config
   elif [ -x Configure ]
   then
    ./Configure 2>tmp.$$
    cat tmp.$$
    readln "Your system?" `cat tmp.$$ | tr ' ' '\n' | grep -i \`uname\` | tail -1`
    rm -f tmp.$$
    echo "Configuring..."
    ./Configure $ans
   fi
  fi
  cd $dir
 fi
}

##########################################################################
umask 077

if [ `whoami` = root ]
then
 echo "Please create a new user, e.g, \`mix', and install Mixmaster under that
user id.  Installing Mixmaster as root is not recommended."
 readln "Continue anyway?" n
 if [ "$ans" = n ]
 then
  exit 1
 fi
fi

MIXDIR=$PWD
if [ "$MIXDIR" = "" ]
then
 MIXDIR=`pwd`
fi
MIXCFG=$MIXDIR/conf
MIXSRC=$MIXDIR/Src
MIXDEST0=${MIXPATH:-$HOME/Mix}

system=`uname`
if [ "$system" = "MS-DOS" ]
then
 system=msdos
fi

if [ "$HOSTNAME" = "" ]
then
 HOSTNAME=`hostname`
fi
if [ "$HOSTNAME" = "" ]
then
 HOSTNAME=msdos
 system=msdos
fi

if [ "$system" = msdos ]
then
 MIXDEST0=${MIXPATH:-C:/Mix}
fi

if [ -f $MIXSRC/Makefile ]
then
 if grep "#Makefile generated.*$HOSTNAME" $MIXSRC/Makefile
 then
  echo "Found a Makefile."
 else
  readln "Remove old Makefile?" y
  if [ "$ans" = y ]
  then
   rm -f $MIXSRC/Makefile
  fi
 fi
fi

if [ -f $MIXSRC/Makefile ]
then
 MIXDEST=`grep "DSPOOL=" $MIXSRC/Makefile | sed 's/.*DSPOOL=..//;s/\".*//'`
 if [ "$MIXDEST" = "" ]
 then
  MIXDEST="$MIXDEST0"
 fi
fi

if [ "$MIXDEST" = "" ]
then
 readln "Mixmaster directory?" $MIXDEST0
 MIXDEST=$ans
else
 echo "Mixmaster directory: $MIXDEST"
fi

if [ ! -d $MIXDEST ]
then
  echo "Creating directory $MIXDEST"
  mkdir $MIXDEST
fi

if [ ! -d $MIXDEST ]
then
  echo "Cannot not create $MIXDEST"
  exit 1
fi

if [ -f $MIXDEST/mix.cfg ]
then
  if [ -f $MIXDEST/secring.mix ]
  then
    remailer=y
    if grep PASSPHRASE $MIXDEST/mix.cfg >/dev/null
    then
      PASSINCONFIG=1
    fi
  else
    readln "Do you want to set up a remailer?" n
    remailer=$ans
  fi
elif [ -f $MIXDEST/mixmaster.conf ]
then
  echo "Upgrading from Mixmaster 2.0.*"
  remailer=n
else
  readln "Do you want to set up a remailer?" y
  remailer=$ans
fi


ans=""
if [ "$remailer" = "y" ]
then
  ans="n"
  if [ "$PASSINCONFIG" != 1 ]
  then
    echo "You can eiter compile your secret pass phrase into the binary
or you can set it in your config file. Note that the former does not
really increase security as the passphrase can still be found out
by running something like �strings mix�."
    readln "Do you want to compile the passphrase into the binary?" n
  fi

  rm -f "$MIXSRC/mix.o" # make sure our new passphrase takes effect
  if [ "$ans" = "y" ]
  then
    ans=""
    echo "Please enter a pass phrase for your remailer (must be the same
whenever you re-compile Mixmaster)."
    read ans

    if [ "$ans" != "" ]
    then
      PASS="PASS=$ans"
    else
      echo "WARNING: not setting a passphrase"
    fi
  else
    if [ "$PASSINCONFIG" != 1 ]
    then
      ans=""
      echo "Please enter a pass phrase for your remailer (it will be
stored in mix.cfg in clear)."
      read ans

      if [ "$ans" == "" ]
      then
        echo "WARNING: setting empty passphrase"
      fi
      PASSPHRASE="PASSPHRASE      $ans"
    fi
  fi
fi


cd $MIXSRC
if [ ! -f Makefile ]
then
 LIBS=
 INC=
 DEF=
 LDFLAGS=

 if [ ! -z "$PASS" ]
 then
   DEF="$DEF -DCOMPILEDPASS='\"\$(PASS)\"'"
 fi

 if [ "$system" = msdos ]
 then
  readln "Use WIN32 GUI?" y
  if [ "$ans" = y ]
  then
   system=win32
   LDFLAGS=-lwsock32
  fi
 fi
 if [ "$system" = SunOS ]
 then
  LDFLAGS="-lsocket -lnsl"
 fi

 LIBDIR=
 INCDIR=
 SRCDIR=zlib*
 findlib libz.a
 if [ "$found" = "" ]
 then
  readln "Continue anyway?" n
  if [ "$ans" = "n" ]
  then
   echo "Please install zlib 1.1.4 or greater now."
   exit 1
  fi
 else
  ZLIB="$MAKELIB"
  DEF="$DEF -DUSE_ZLIB"
  LIBS="$LIBS $LIB"
  LDFLAGS="$LDFLAGS $LDFLAG"
  if [ "$INCDIR" != "" ]
  then
   INC="$INC -I$INCDIR"
  fi
 fi

 LIBDIR=
 INCDIR=
 SRCDIR=pcre*
 findlib libpcre.a
 if [ "$found" != "" ]
 then
  PCRE="$MAKELIB"
  DEF="$DEF -DUSE_PCRE"
  LIBS="$LIBS $LIB"
  LDFLAGS="$LDFLAGS $LDFLAG"
  if [ "$INCDIR" != "" ]
  then
   INC="$INC -I$INCDIR"
  fi
 fi

 opensslinfo="Please get OpenSSL 0.9.6f or greater from http://www.openssl.org/"
 opensslwarning="WARNING: This version of OpenSSL contains known vulnerabilities. Please upgrade to OpenSSL 0.9.6f or greater!"
 LIBDIR=/usr/local/ssl/lib
 INCDIR="/usr/include /usr/include/ssl /usr/lib/ssl/include /usr/local/ssl/include"
 SRCDIR="openssl*"

 if [ "$system" = win32 ]
 then
  findlib libeay32.a
 else
  findlib libcrypto.a
 fi
 if [ "$found" = "" ]
 then
  echo $opensslinfo
  exit 1
 fi

 LIBS="$LIBS $LIB"
 LDFLAGS="$LDFLAGS $LDFLAG"
 if [ "$MAKELIB" != "" ]
 then
  OPENSSL="$found/$lib:
        cd $found/crypto; make"
 fi
 if [ -d "$INCDIR/openssl" ]
 then
  INC="$INC -I$INCDIR"
 else
  # detect old SSLeay versions
  if [ -f "$INCDIR/crypto.h" ]
  then
   version=800
   if grep OPENSSL "$INCDIR/crypto.h" > /dev/null
   then
    version=920
   fi
  fi
 fi 

 # Find the OpenSSL version header
 if [ -f $INCDIR/openssl/opensslv.h ]
 then
  version=`grep 'SSL.*_VERSION_NUMBER.*0x' $INCDIR/openssl/opensslv.h | sed 's/.*0x0*//;s/[     ].*//;s/L$//'`
 elif [ -f $INCDIR/opensslv.h ]
 then
  version=`grep 'SSL.*_VERSION_NUMBER.*0x' $INCDIR/opensslv.h | sed 's/.*0x0*//;s/[     ].*//;s/L$//'`
 fi
 if [ "$version" = "" ]
 then
  echo "Warning: Can't find OpenSSL version number!"
  readln "Continue anyway?" y
  if [ "$ans" = "n" ]
  then
   echo $opensslinfo
   exit 1
  fi
 elif [ "16#$version" = "16#90581f" ]
 then
  echo "Compiling with OpenSSL 0.9.5a."
  echo $opensslwarning
 elif [ "16#$version" = "16#90601f" ]
 then
  echo "Compiling with OpenSSL 0.9.6a."
  echo $opensslwarning
 elif [ "16#$version" = "16#90602f" ]
 then
  echo "Compiling with OpenSSL 0.9.6b."
  echo $opensslwarning
 elif [ "16#$version" = "16#90603f" ]
 then
  echo "Compiling with OpenSSL 0.9.6c."
  echo $opensslwarning
 elif [ "16#$version" = "16#90604f" ]
 then
  echo "Compiling with OpenSSL 0.9.6d."
  echo $opensslwarning
 elif [ "16#$version" = "16#90605f" ]
 then
  echo "Compiling with OpenSSL 0.9.6e."
  echo $opensslwarning
 elif [ "16#$version" = "16#90606f" ]
 then
  echo "Compiling with OpenSSL 0.9.6f."
 elif [ "16#$version" = "16#90607f" ]
 then
  echo "Compiling with OpenSSL 0.9.6g."
 elif [ "$version" -lt "920" ]
 then
  echo "This version: ${version} of SSLeay is not supported."
  echo $opensslinfo
  exit 1
 elif [ "$version" -lt "903100" ]
 then
  echo "This version: ${version} of OpenSSL is not supported."
  echo $opensslinfo
  exit 1
 elif [ "$version" -gt "906000" ]
 then
  echo "Warning: This version: ${version} of OpenSSL is untested."
  readln "Continue anyway?" y
  if [ "$ans" = "n" ]
  then
   echo $opensslinfo
   exit 1
  fi
 fi

 LIBDIR=
 INCDIR=/usr/include/ncurses
 SRCDIR=ncurses*
 CONFIG=--enable-termcap
 if [ "$TERMINFO" != "" ]
 then
  CONFIG="--datadir=$TERMINFO"
 fi
 if [ -d /usr/share/terminfo ]
 then
  CONFIG=
 fi
 if [ -d /usr/lib/terminfo ]
 then
  CONFIG=--datadir=/usr/lib/terminfo
 fi

  if [ `uname` = OpenBSD ]
  then
   findlib libcurses.a
  else
   findlib libncurses.a
  fi
 if [ "$found" = "" ] 
 then
  if [ "$system" != win32 ]
  then
   readln "Do you want to use Mixmaster's menu-based user interface?" y
   if [ "$ans" = "y" ]
   then
    echo "Please install ncurses now. It is available from 
http://www.clark.net/pub/dickey/ncurses/ncurses.tar.gz"   
    exit 1
   fi
  fi
 else
  DEF="$DEF -DUSE_NCURSES"
  if [ "$type" = system -o "$type" = installed ]
  then
   LIBS="$LIBS $LIB"
   LDFLAGS="$LDFLAGS $LDFLAG"
  else
   LIBS="$LIBS $found/lib/$lib"
   NCURSES="$found/lib/$lib:
        cd $found/ncurses; make ../lib/$lib"
  fi
  if [ "$INCDIR" != "" ]
  then
   INC="$INC -I$INCDIR"
  elif [ -f "/usr/include/ncurses.h" ]
  then
   DEF="$DEF -DHAVE_NCURSES_H"
  fi
 fi

 if [ "$system" = OpenBSD ]
 then
  LIBDIR=
  INCDIR=
  SRCDIR=idea*
  findlib libidea.a
  if [ "$found" = "" ]
  then
    echo "WARNING: Building without IDEA. This means (among other things) that
Mixmaster will not create an RSA OpenPGP key (to cut down mail loss)"
  else
   DEF="$DEF -DUSE_IDEA"
   IDEALIB="$MAKELIB"
   LIBS="$LIBS $LIB"
   LDFLAGS="$LDFLAGS $LDFLAG"
   if [ "$INCDIR" != "" ]
   then
    INC="$INC -I$INCDIR"
   fi
  fi
 elif [ "$system" = msdos -o "$system" = win32 ]
 then
  DEF="$DEF -DUSE_IDEA"
 else
   cat <<END >tmptst.c
#include <openssl/idea.h>
int main() {
  exit(0);
}
END
   if gcc $INC tmptst.c -c -o /dev/null
   then
     DEF="$DEF -DUSE_IDEA"
   else
     echo "WARNING: Building without IDEA. This means (among other things) that
Mixmaster will not create an RSA OpenPGP key (to cut down mail loss)"
   fi
   rm -f tmptst.c
 fi


# if [ "$MIXDEST" = "$HOME/Mix" ]
# then
#  SPOOL=
# else
  SPOOL=-DSPOOL=\'\"$MIXDEST\"\'
# fi

 echo "Generating Makefile."
 echo "#Makefile generated on $HOSTNAME `date`" >Makefile
 sed -e "s#%MIXDIR#$SPOOL#" \
     -e "s#%LIBS#$LIBS#" \
     -e "s#%LDFLAGS#$LDFLAGS#" \
     -e "s#%INC#$INC#" \
     -e "s#%DEF#$DEF#" < Makefile.in >> Makefile
 echo "$ZLIB" >>Makefile
 echo "$PCRE" >>Makefile
 echo "$IDEALIB" >>Makefile
 echo "$NCURSES" >>Makefile
 echo "$OPENSSL" >>Makefile
fi


echo "Compiling. Please wait."
whereis gmake make
make=$found

if [ "$system" = win32 ]
then
 (cd zlib*; make libz.a)
 (cd pcre*; make libpcre.a)
 if [ "$PASS" != "" ]
 then
  $make "$PASS" dllmix
 else
  $make dllmix
 fi
else
 if [ "$PASS" != "" ]
 then
  $make "$PASS"
 else
  $make
 fi
fi

if [ -x mix ]
then
 echo
else
 echo "Error: The compilation failed. Please consult the documentation (section
\`Installation problems')."
 readln "Remove the old Makefile?" y
 if [ "$ans" = y ]
 then
  rm -f Makefile
 fi
 exit 1
fi

if [ -f $MIXDEST/mixmaster.conf -a ! -f $MIXDEST/mix.cfg ]
then
 export MIXDEST
 export MIXDIR
 export MIXSRC
 ${MIXDIR}/upgrade
 exit 0
fi

if [ -f mix.exe ]
then
 cp mix.exe $MIXDEST
else
 cp mix $MIXDEST
fi

cd $MIXCFG
for i in mlist.txt pubring.mix rlist.txt pubring.asc type2.list
do
 if [ ! -f $MIXDEST/$i ]
 then
  cp $i $MIXDEST
 fi
done

if [ "$remailer" = "y" ]
then
 cd $MIXCFG
 for i in adminkey.txt dest.alw
 do
  if [ ! -f $MIXDEST/$i ]
  then
   cp $i $MIXDEST
  fi
 done
fi

if [ "$remailer" = "n" ]
then
 if [ ! -f $MIXDEST/mix.cfg ]
 then
  whereis sendmail /usr/lib/sendmail /usr/sbin/sendmail
  echo "SENDMAIL        $found -t" >$MIXDEST/mix.cfg
  cat mix.cfg >>$MIXDEST/mix.cfg
 fi
 echo "Client installation complete."
 exit
fi

for i in *.blk
do
 if [ ! -f $MIXDEST/$i ]
 then
  cp $i $MIXDEST
 fi
done

cd $MIXDEST

installed=n
if [ -f mix.cfg ]
then
 if grep REMAILERADDR mix.cfg >/dev/null
 then
  installed=y
 fi
fi 

if [ "$installed" = "n" ]
then
 Date=`date`
 whereis sendmail /usr/lib/sendmail /usr/sbin/sendmail
 sendmail=$found

 echo "Mixmaster can be installed in the low-maintenance \`middleman' mode.
In that mode, it will send mail to other remailers only, to avoid
complaints about anonymous messages."
 readln "Install as middleman?" n
 middle=$ans

 readln "The e-mail address of your remailer:" `whoami`@$HOSTNAME
 RMA=$ans

 echo "Do you want Mixmaster to send auto-replies to messages it does not
understand (If the address <$RMA> is also used"
 readln "for mail to be read by a human, type \`n')?" y
 autoreply=$ans

 if [ "$middle" = n ]
 then
  readln "An address to appear in the \`From:' line of anonymous messages:" `echo $RMA | sed 's/.*@/nobody@/'`
  RAA=$ans

  readln "Address for complaints to be sent to:" `echo $RMA | sed 's/.*@/abuse@/'`
  CA=$ans
 else
  RAA=$RMA
  CA=$RMA
 fi

 echo "Choose a name for your remailer.  It will appear in remailer status messages."
 readln "Long name:" "Anonymous Remailer"
 RMN=$ans

 if [ "$middle" = n ]
 then
  echo "Choose a name to be used in the \`From:' line of remailed messages."
  readln "Anon long name:" "Anonymous"
  RAN=$ans
 fi

 readln "A short name to appear in lists:" `echo $HOSTNAME|sed 's/\..*//'`
 SN=$ans

 readln "Accept Mixmaster (Type II) messages?" y
 mix=$ans

 readln "Accept PGP (Type I) remailer messages?" n
 pgp=$ans

 unencrypted=n
 if [ "$pgp" = "y" ]
 then
  readln "Accept unencrypted remailer messages?" n
  unencrypted=$ans
 fi

 echo "Mixmaster will log error messages and warnings. Do you want to log"
 readln "informational messages about normal operation as well?" y 
 if [ "$ans" = y ]
 then 
  verbose=2
 else
  verbose=1
 fi

 readln "Filter binary attachments?" n
 binfilter=$ans

 if [ "$middle" = n ]
 then
  if [ "$autoreply" = y ]
  then
   readln "Allow users to add themselves to the list of blocked addresses?" y
   autoblock=$ans
  fi

  echo "Do you want to allow posting? Newsgroups can be restricted in dest.blk.
y)es, post locally; use m)ail-to-news gateway; n)o."
  readln "Allow posting to Usenet?" m
  post="$ans"
  if [ "$ans" = y ]
  then
   whereis inews /usr/lib/news/inews
   readln "News posting software:" "$found -h"
   news=$ans
   readln "Organization line for anonymous Usenet posts:" "Anonymous Posting Service"
   orga=$ans
   readln "Use anti-spam message IDs?" y
   mid=$ans
  elif [ "$ans" = m ]
  then
   readln "Mail-to-news gateway:" mail2news@nym.alias.net
   news=$ans
  fi
 fi

 echo "How many messages do you want to keep in the reordering pool?
A larger pool is more secure, but also causes higher latency.
0 means to remail immediately."
 readln "Pool size:" 20
 poolsize=$ans

 mbox=
 if [ -f ~/.forward ]
 then
  mbox=`head -1 ~/.forward | sed 's/^"//;s/"$//'`
  if echo "$mbox" | grep 'mix' >/dev/null 2>/dev/null
  then
   mbox=
  elif echo "$mbox" | grep 'procmail' >/dev/null 2>/dev/null
  then
   if grep mix ~/.procmailrc >/dev/null 2>/dev/null
   then
    mbox=
   fi
  fi
 fi

 if [ "$mbox" = "" ]
 then
  mbox=${MAIL:-/usr/spool/mail/$NAME}
  touch "$mbox"
  if [ ! -w "$mbox" ]
  then
   echo "$mbox is not writeable."
   readln "Mailbox for non-remailer messages:" ${MIXDEST}/mbox
   mbox=$ans
  fi
 fi

 cat <<END >mix.cfg
# mix.cfg -- installed $Date
SENDMAIL        $sendmail -t

# Where to store non-remailer messages:
MAILBOX         $mbox
#MAILABUSE      mbox.abuse
#MAILBLOCK      mbox.block
#MAILUSAGE      mbox.usage
#MAILANON       mbox.anon
#MAILERROR      mbox.error
#MAILBOUNCE     mbox.bounce

REMAIL          y
MIDDLEMAN       $middle

BINFILTER       $binfilter
AUTOBLOCK       $autoblock

ERRLOG          error.log
VERBOSE         $verbose

# Remailer name and addresses
REMAILERADDR    $RMA
ANONADDR        $RAA
COMPLAINTS      $CA

SHORTNAME       $SN
REMAILERNAME    $RMN
ANONNAME        $RAN

# Supported formats:
MIX             $mix
PGP             $pgp
UNENCRYPTED     $unencrypted

# Maximum message size in kB (0 for no limit):
SIZELIMIT       0

# Usenet news:
NEWS            $news
ORGANIZATION    $orga
MID             $mid

# Remailing strategy:
SENDPOOLTIME    0h
POOLSIZE        $poolsize
RATE            100

IDEXP           7d
PACKETEXP       7d

$PASSPHRASE

END

fi # not yet installed


REPLACE="s/%RMN/$RMN/g;s/%RMA/$RMA/g;s/%CA/$CA/g;s/%RAA/$RAA/g"
if [ "$installed" = "n" ]
then
 cd $MIXCFG
 if [ ! -f $MIXDEST/help.txt ]
 then
  sed "$REPLACE" < intro.hlp >$MIXDEST/help.txt
  if [ "$mix" = y ]
  then
   sed "$REPLACE" < mix.hlp >>$MIXDEST/help.txt
  fi
  if [ "$unencrypted" = y ]
  then
   sed "$REPLACE" < type1.hlp >>$MIXDEST/help.txt
   if [ "$pgp" = y ]
   then
    sed "$REPLACE" < pgp.hlp >>$MIXDEST/help.txt
   fi
  elif [ "$pgp" = y ]
  then
   sed "$REPLACE" < pgponly.hlp >>$MIXDEST/help.txt
  fi
  if [ "$post" = y ]
  then
   if [ "$pgp" = y -o "$unencrypted" = y ]
   then
    sed "$REPLACE" < news.hlp >>$MIXDEST/help.txt
   fi
  fi
  sed "$REPLACE" < end.hlp >>$MIXDEST/help.txt
 fi

 for i in *.txt.in
 do
  j=`echo $i | sed 's/\.in$//'`
  if [ ! -f $MIXDEST/$j ]
  then
    sed "$REPLACE" < $i >$MIXDEST/$j
  fi
 done
 cd $MIXDEST
fi

echo
if [ ! -f secring.mix ]
then
 echo "Generating secret keys. This may take a while..."
else
 echo "Updating secret keys..."
fi
./mix -K
if [ -f key.txt ]
then
 echo "Done."
 echo
else
 echo "Installation failed. Please consult the Mixmaster documentation."
 exit 1
fi

if [ "$system" = msdos -o "$system" = win32 ]
then
 exit
fi

umask 033

# Set .forward?
set=y

if grep procmail ~/.forward >/dev/null 2>/dev/null
then
 if grep mix ~/.procmailrc >/dev/null 2>/dev/null
 then
  echo "Mixmaster is installed in your .procmailrc file."
  set=n
 fi
fi

if [ "$set" = y -a -f ~/.forward ]
then
 echo "Your current .forward is:"
 cat ~/.forward
 echo
 if grep mix ~/.forward >/dev/null 2>/dev/null
 then
  echo "Mixmaster already is installed in your .forward file."
  set=n
 elif [ "$mbox" != "" ]
 then
  if echo "$mbox" | grep '|' >/dev/null 2>/dev/null
  then
   echo "Mixmaster will pipe messages to $mbox"
  elif echo $mbox | grep '@' >/dev/null 2>/dev/null
  then
   echo "Mixmaster will forward messages to $mbox"
  else
   echo "Mixmaster will store messages to $mbox"
  fi
 fi
fi

if [ "$set" = y ]
then
 echo "Set .forward to the following line:"
 echo "\"|${MIXDEST}/mix -RM\""
 if [ -f ~/.forward ]
 then
  readln "Overwrite now?" n
 else
  readln "Do that now?" n
 fi
 if [ "$ans" = "y" ]
 then
  echo "\"|${MIXDEST}/mix -RM\"" >~/.forward
 fi
fi

if [ "$RMA" != "" ]
then
 echo "
Mixmaster will send the following files as auto-replies:
Mail to <$RMA> with Subject: remailer-help => help.txt"
 echo "Mail to <$RMA> with Subject: remailer-adminkey => adminkey.txt
Remember to add your Remailer Admin public PGP key to the adminkey.txt file."
 if [ "$autoblock" = y ]
 then
  echo "Mail to <$RMA> with line DESTINATION-BLOCK => blocked.txt"
 fi
 if [ "$autoreply" = y ]
 then
  echo "Other mail to <$RMA> => usage.txt"
  echo
  if [ "$CA" != "$RMA" ]
  then
   echo "If you arrange for mail to <$CA> and <$RAA>
to be forwarded to <$RMA>:
Mail to <$CA> => abuse.txt
Mail to <$RAA> => reply.txt"
  fi
 fi
fi

echo
echo "Mixmaster installation complete."
