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#!/bin/sh
#  ___                   ____ ____  ____
# / _ \ _ __   ___ _ __ | __ ) ___||  _ \
#| | | | '_ \ / _ \ '_ \|  _ \___ \| | | |
#| |_| | |_) |  __/ | | | |_) |__) | |_| |
# \___/| .__/ \___|_| |_|____/____/|____/
#      |_| ----------------------Live CD-
#
# This script creates an OpenBSD Live CD and lets you customize it
#
#
# Copyright (c) 2009 Reiner Rottmann. Released under the BSD license.
#
# First release 2009-06-20
###############################################################################
# Defaults
###############################################################################
MAJ=4     # Version major number
MIN=8       # Version minor number
ARCH=amd64    # Architecture
TZ=Asia/shanghai   # Time zones are in /usr/share/zoneinfo
# The base sets that should be installed on the live cd
SETS="base etc man"
# Additional packages that should be installed on the live cd
#PACKAGES="mc screen mutt nano curl cdrtools dvd+rw-tools rsync vim wget"
#PACKAGES="vim"
WDIR=/home/oblivecd   # Working directory
CDBOOTDIR=$WDIR/$MAJ.$MIN/$ARCH  # CD Boot directory
# Mirror to use to download the OpenBSD files
BASEURL=http://obsd.cec.mtu.edu/pub/OpenBSD
MIRROR=$BASEURL/$MAJ.$MIN/$ARCH
PKG_PATH=$BASEURL/$MAJ.$MIN/packages/$ARCH
OPENDNS=208.67.220.220   # Open DNS Server to use in live cd
 
CLEANUP=yes    # Clean up downloaded files and workdir
# End of user configuration 
###############################################################################
# global variables
SCRIPTNAME=$(basename $0 .sh)
EXIT_SUCCESS=0
EXIT_FAILED=1
EXIT_ERROR=2
EXIT_BUG=10
VERSION="1.0.1"
# base functions
# In case of an error it is wise to show the correct usage of the script.
function usage {
 echo >&2
 echo -e "Usage: $SCRIPTNAME \t[-A <arch>] [-h] [-M <major>] [-m <minor>] [-P <packages>]" >&2
 echo -e "                   \t\t[-S <sets>] [-T <timezone>] [-V] [-W <workdir>] [-U <url>]" >&2
 echo >&2
        echo "This program creates an OpenBSD live cd and lets you customize it." >&2
        echo "The software is released under BSD license. Use it at your own risk!" >&2
 echo "Copyright (c) 2009 Reiner Rottmann. Email: reiner[AT]rottmann.it" >&2
        echo >&2
        echo -e "  -A :\tselect architecture (default: $ARCH)" >&2 
 echo -e "  -h :\tgive this help list" >&2
 echo -e "  -M :\tselect OpenBSD major version (default: $MAJ)" >&2
        echo -e "  -m :\tselect OpenBSD minor version (default: $MIN)" >&2
        echo -e "  -P :\tselect additional packages to install" >&2
 echo -e "      \t(default: $PACKAGES)" >&2
        echo -e "  -S :\tselect base sets (default: $SETS)" >&2
 echo -e "  -T :\tselect timezone (default: $TZ)" >&2
        echo -e "  -U :\tselect url of nearest OpenBSD mirror (default: $MIRROR)" >&2
        echo -e "  -u :\tselect url of nearest OpenBSD from mirror list (requires wget)" >&2
        echo -e "  -V :\tprint version" >&2
 echo -e "  -W :\tselect working directory (default: $WDIR)" >&2
        echo >&2
        echo -e "Example:" >&2
        echo -e "# $SCRIPTNAME -A i386 -M 4 -m 5 -W /tmp/livecd" >&2
        echo >&2
        [[ $# -eq 1 ]] && exit $1 || exit $EXIT_FAILED
}
# own functions
# This function lets the user choose an OpenBSD mirror
function choosemirror {
 req="wget"
 for i in $req
 do
  if ! which $i >/dev/null; then
   echo "Missing $i. Exiting."
   exit $EXIT_ERROR
  fi
 done
 mirrorlist=$(wget -q -O - http://www.openbsd.org/ftp.html#ftp | sed -n 's#<a href=\"\(ftp://.*\)/">#\1#p'|sort)
 
 echo "Please select mirror from the list below:"
 
 mirr=""
 while [ -z "$mirr" ] ; do
         m=1
         for i in $mirrorlist
         do
                 echo $m. "$i"
                 m=$(($m+1))
         done
         echo -n "Your choice? : "
         read choice
         mirr=$(echo "$mirrorlist" | sed -n $choice,${choice}p| sed s#^\ *##g)
 done
 BASEURL=$mirr
 MIRROR=$BASEURL/$MAJ.$MIN/$ARCH
 PKG_PATH=$BASEURL/$MAJ.$MIN/packages/$ARCH
 CDBOOTDIR=$WDIR/$MAJ.$MIN/$ARCH
}
# This function may be used for cleanup before ending the program
function cleanup {
 echo
}
 
# This is the main function that creates the OpenBSD livecd
function livecd {
 echo "
[*] OpenBSD LiveCD script"
        echo "
[*] This program creates an OpenBSD live cd and lets you customize it." >&2
        echo "
[*] The software is released under BSD license. Use it at your own risk!" >&2
 echo "
[*] Copyright (c) 2009 Reiner Rottmann." >&2
 echo "
[*] This script is released under the BSD License."
 uname -a | grep OpenBSD || echo "
[*] WARNING: This software should run on an OpenBSD System!"
 date
 echo "
[*] Setting up the build environment..."
 mkdir -p $WDIR
  if [[ $CHMIRROR = y ]] ; then
  echo "
[*] Selecting OpenBSD mirror..."
  choosemirror
  echo $MIRROR
 fi
 
 # Create CD Boot directory
 mkdir -p $CDBOOTDIR && cd $CDBOOTDIR
 echo "
[*] Downloading files needed for CD Boot..."
 CDBOOTFILES="cdbr cdboot bsd"
 cd $CDBOOTDIR && for i in $CDBOOTFILES; do test -f $CDBOOTDIR/$i || ftp -o $CDBOOTDIR/$i -m $MIRROR/$i; done 
 
 echo "
[*] Downloading file sets ($SETS)..."
 cd $WDIR && for i in $SETS; do test -f $WDIR/$i$MAJ$MIN.tgz || ftp -o $WDIR/$i$MAJ$MIN.tgz -m $MIRROR/$i$MAJ$MIN.tgz; done
 echo "
[*] Extracting file sets ($SETS)..."
 cd $WDIR && for i in $SETS; do tar xzpf $WDIR/$i$MAJ$MIN.tgz; done
 if [ $CLEANUP="yes" ];then
  echo "
[*] Deleting file set tarballs ($SETS)..."
  cd $WDIR && for i in $SETS; do rm -f $WDIR/$i$MAJ$MIN.tgz; done
 fi
 echo "
[*] Populating dynamic device directory..."
 cd $WDIR/dev && $WDIR/dev/MAKEDEV all
 echo "
[*] Creating boot configuration..."
 echo "set image $MAJ.$MIN/$ARCH/bsd" > $WDIR/etc/boot.conf
 echo "
[*] Creating fstab entries..."
 cat >/$WDIR/etc/fstab <<EOF
swap /tmp mfs rw,auto,-s=120000 0 0
swap /var mfs rw,auto,-P/mfsvar 0 0
swap /etc mfs rw,auto,-P/mfsetc 0 0
swap /root mfs rw,auto,-P/mfsroot 0 0
swap /dev mfs rw,auto,-P/mfsdev 0 0
EOF
 echo "
[*] Creating motd file..."
 cat >$WDIR/etc/motd <<EOF
  ___                   ____ ____  ____
 / _ \\ _ __   ___ _ __ | __ ) ___||  _ \\
| | | | '_ \\ / _ \\ '_ \\|  _ \\___ \\| | | |
| |_| | |_) |  __/ | | | |_) |__) | |_| |
 \\___/| .__/ \\___|_| |_|____/____/|____/
      |_| ----------------------Live CD-
Welcome to OpenBSD: The proactively secure Unix-like operating system.
Please use the sendbug(1) utility to report bugs in the system.
Before reporting a bug, please try to reproduce it with the latest
version of the code.  With bug reports, please try to ensure that
enough information to reproduce the problem is enclosed, and if a
known fix for it exists, include that as well.
EOF
 echo "
[*] Creating dhcp client configuration..."
 cat >$WDIR/etc/dhclient.conf <<EOF
initial-interval 1;
request subnet-mask,
 broadcast-address,
 routers, domain-name,
 domain-name-servers,
 host-name;
EOF
 echo "
[*] Modifying rc.local..."
 cat >>$WDIR/etc/rc.local <<EOF
# If you have enough memory, this speeds up some bins, but you must 
# add /binmfs/bin and /binmfs/sbin to your path, before /bin and /sbin
mymem=`sysctl hw.physmem | cut -f 2 -d =`                             
if [ \$mymem -gt 268000000 ]                                           
then                                                                  
        mount_mfs -s 48000 swap /binmfs >/dev/null 2>&1               
        mkdir /binmfs/bin                                             
        mkdir /binmfs/sbin                                            
        /bin/cp -rp /bin /binmfs                                      
        /bin/cp -rp /sbin /binmfs                                     
fi                                                                    
# Select keyboard language
echo "Select keyboard language (by number):"
select klang in us de es it fr be jp nl ru uk sv no pt br hu tr dk sg pl sf lt la lv
do                                                                                  
        /sbin/kbd \$klang                                                            
        break                                                                       
done                                                                                
# function for setting the timezone
sub_timezone() {                   
   while :
   do     
      echo -n "What timezone are you in? ('?' for list) "
      read zone                                          
      if [ \${zone} = "?" ]
      then                
         ls -F /usr/share/zoneinfo
      fi                          
      if [ -d /usr/share/zoneinfo/\${zone} ]
      then                                 
         ls -F /usr/share/zoneinfo/\${zone} 
         echo -n "What sub-timezone of \${zone} are you in? "
         read subzone                                       
         zone="\${zone}/\${subzone}"                          
      fi                                                    
      if [ -f /usr/share/zoneinfo/\${zone} ]
      then                                 
         echo "Setting local timezone to \${zone} ..."
         rm /etc/localtime                           
         ln -sf /usr/share/zoneinfo/\${zone} /etc/localtime
         echo "done"                                      
         return                                           
      fi                                                  
   done                                                   
}                                                         
# Select timezone
echo -n "Do you want to configure the timezone? (y/N): "
read timeconf                                           
if [ ! -z \$timeconf ]                                   
then                                                    
   if [ \$timeconf = "y" ] || [ \$timeconf = "Y" ] || [ \$timeconf = "yes"] || [ \$timeconf = "Yes" ]
   then                                                                                          
      sub_timezone                                                                               
   fi                                                                                            
fi                                                                                               
# Configure network interface
myif=\$(ifconfig | awk -F: '/^[a-z][a-z]+[0-3]: flags=/ { print \$1 }' | grep -v lo | grep -v enc | grep -v pflog)
for thisif in \$myif                                                                                            
do                                                                                                             
   ifconfig \$thisif up                                                                                         
   echo "starting dhclient \$thisif in background"                                                              
   dhclient -q \$thisif 2>/dev/null &                                                                           
done                                                                                                           
# If you have enough memory, you can populate /usr/local to RAM
if [ \$mymem -gt 500000000 ]                                    
then                                                           
        echo -n "Do you want /usr/local loading to RAM (y/N)? "
        read ownpack                                           
        if [ ! -z \$ownpack ]                                   
        then                                                   
           if [ \$ownpack = "y" ] || [ \$ownpack = "Y" ] || [ \$ownpack = "yes" ] || [ \$ownpack = "Yes" ]
           then                                                                                       
              echo "Loading ... please wait ..."                                                      
              if [ \$mymem -gt 800000000 ]                                                             
              then                                                                                    
                 mount_mfs -s 691200 -P /usr/local-cd swap /usr/local                                 
              else                                                                                    
                 mount_mfs -s 473088 -P /usr/local-cd swap /usr/local                                 
              fi                                                                                      
           fi                                                                                         
         fi                                                                                           
fi
# Password for root
echo -n "Do you want to set a password for root(y/N)?"
read rootpass                                         
if [ ! -z \$rootpass ]                                 
then                                                  
   if [ \$rootpass = "y" ] || [ \$rootpass = "Y" ] || [ \$rootpass = "Yes" ] || [ \$rootpass = "yes" ] || [ \$rootpass = "YES" ]
   then                                                                                                                    
      passwd root                                                                                                          
   fi                                                                                                                      
else                                                                                                                       
   echo "password for root not set (password empty)"                                                                       
fi                                                                                                                         
EOF
 echo "
[*] Modifying the library path..."
 echo >> $WDIR/root/.cshrc << EOF
# Workaround for missing libraries:
export LD_LIBRARY_PATH=/usr/local/lib
EOF
 echo >> $WDIR/root/.profile << EOF
# Workaround for missing libraries:
export LD_LIBRARY_PATH=/usr/local/lib
EOF
 echo >> $WDIR/etc/profile/.cshrc << EOF
# Workaround for missing libraries:
export LD_LIBRARY_PATH=/usr/local/lib
EOF
 echo >> $WDIR/etc/profile/.profile << EOF
# Workaround for missing libraries:
export LD_LIBRARY_PATH=/usr/local/lib
EOF
 echo "
[*] Using OpenDNS ($OPENDNS) in livecd environment..."
 echo "nameserver $OPENDNS" > $WDIR/etc/resolv.conf
 echo "
[*] Installing additional packages..."
 cat > $WDIR/tmp/packages.sh <<EOF
#!/bin/sh
export PKG_PATH=$(echo $PKG_PATH | sed 's#\ ##g')
for i in $PACKAGES
do
 pkg_add -i \$i
done
EOF
 chmod +x $WDIR/tmp/packages.sh
 chroot $WDIR /tmp/packages.sh
 rm $WDIR/tmp/packages.sh
 echo "
[*] Entering livecd."
 echo "
[*] Once you have finished your modifications, type \"exit\""
 echo "Tipps:"
cat <<EOF
Packages can be managed easily with the help of several utilities, also referred to as the pkg* tools:
    * pkg_add(1) - a utility for installing and upgrading software packages.
    * pkg_delete(1) - a utility for deleting previously installed software packages.
    * pkg_info(1) - a utility for displaying information about software packages.
    * pkg_create(1) - a utility for creating software packages. 
To fetch packages from the OpenBSD mirror, use the following command:
# export PKG_PATH=$(echo $PKG_PATH | sed 's#\ ##g')
If you want to try out your software, you may encounter the following error message:
program: can't load library 'somelibrary'
To get rid of it, there is the following workaround:
export LD_LIBRARY_PATH=/usr/local/lib
 
EOF
 chroot $WDIR
 echo "
[*] Deleting sensitive information..."
 cd $WDIR && rm -i root/{.history,.viminfo}
 cd $WDIR && rm -i home/*/{.history,.viminfo}
 echo "
[*] Empty log files..."
 for log_file in $(find $WDIR/var/log -type f)
 do
  echo "" > $log_file
 done
 echo "
[*] Remove ports and src (only on live cd)..."
 rm -rf $WDIR/usr/{src,ports,xenocara}/*
 echo "
[*] Removing ssh host keys..."
 rm $WDIR/etc/ssh/*key*
 echo "
[*] Saving creation timestamp..."
 date > $WDIR/etc/livecd-release
 echo "
[*] Saving default timezone..."
 ln -s /usr/share/zoneinfo/$TZ $WDIR/etc/localtime
 
 echo "
[*] Creating mfs-mount directories..."
 cp -rp $WDIR/var $WDIR/mfsvar
 rm -r $WDIR/var/*
 cp -rp $WDIR/root $WDIR/mfsroot
 cp -rp $WDIR/etc $WDIR/mfsetc
 mkdir $WDIR/mfsdev
 cp -p $WDIR/dev/MAKEDEV $WDIR/mfsdev/
 cd $WDIR/mfsdev && $WDIR/mfsdev/MAKEDEV all
 echo "
[*] Creating live-cd iso..."
 cd /
 mkhybrid -l -R -o $WDIR/livecd$MAJ$MIN-$ARCH.iso -b $MAJ.$MIN/$ARCH/cdbr -c $MAJ.$MIN/$ARCH/boot.catalog $WDIR
 echo "
[*] Your modified OpenBSD iso is in $WDIR/livecd$MAJ$MIN-$ARCH.iso"
 ls -lh $WDIR/livecd$MAJ$MIN-$ARCH.iso
 #if [ $CLEANUP="yes" ];then
 # echo "
[*] Cleanup"
 # echo -n "Do you want to delete the working directory $WDIR? (y/N): "
 # read deletewdir
 # if [ ! -z $deletewdir ]
 # then
 #  if [ $deletewdir = "y" ] || [ $deletewdir = "Y" ] || [ $deletewdir = "yes"] || [ $deletewdir = "Yes" ]
 #  then
 #   rm -rf $WDIR
    #  fi
 # fi
 #fi
 echo "
[*] One final note: Please support the OpenBSD project by buying official cd sets or donating some money!"
 date
 echo "
[*] Done."
}
# Evaluate the command line options
while getopts 'A:hM:m:P:S:T:U:uvVW:' OPTION ; do
        case $OPTION in
        A)      ARCH=${OPTARG}
                ;;
 h)      usage $EXIT_ERFOLG
                ;;
 M)      MAJ=${OPTARG}
                ;;
 m)      MIN=${OPTARG}
                ;;
 P)      PACKAGES=${OPTARG}
                ;;
 S)      SETS=${OPTARG}
                ;;
 T)      TZ=${OPTARG}
                ;;
 U)      BASEURL=${OPTARG}
                ;;
 u)      CHMIRROR=y
                ;;
        v)      VERBOSE=y
                ;;
        V)      echo $VERSION
                exit $EXIT_ERROR
                ;;
 W)      WDIR=${OPTARG}
                ;;
 
        \?)     echo "Unknown option \"-$OPTARG\"." >&2
                usage $EXIT_ERROR
                ;;
        :)      echo "Option \"-$OPTARG\" needs an argument." >&2
                usage $EXIT_ERROR
                ;;
        *)      echo "" >&2
                usage $EXIT_ERROR
                ;;
        esac
done
# Skip already used arguments
shift $(( OPTIND - 1 ))
# Loop over all arguments
for ARG ; do
        if [[ $VERBOSE = y ]] ; then
                echo -n "Argument: "
        fi
        #echo $ARG
done
# Call (main-)function
livecd
# Skript beenden
cleanup
exit $EXIT_SUCCESS