clamav-milter 0.99+dfsg-1ubuntu1 / config

#!/bin/sh

set -e

# Source debconf library
. /usr/share/debconf/confmodule

# This conf script is capable of backing up
db_version 2.0
db_capb backup

to_lower()
{
  word="$1"
  lcword=$(echo "$word" | tr A-Z a-z)
  echo "$lcword"
}

is_true()
{
  var="$1"
  lcvar=$(to_lower "$var")
  [ 'true' = "$lcvar" ] || [ 'yes' = "$lcvar" ] || [ 1 = "$lcvar" ]
  return $?
}

is_false()
{
  var="$1"
  lcvar=$(to_lower "$var")
  [ 'false' = "$lcvar" ] || [ 'no' = "$lcvar" ] || [ 0 = "$lcvar" ]
  return $?
}

ucf_cleanup()
{
  # This only does something if I've fucked up before
  # Not entirely impossible :(

  configfile=$1

  if [ `grep "$configfile" /var/lib/ucf/hashfile | wc -l` -gt 1 ]; then
    grep -v "$configfile" /var/lib/ucf/hashfile > /var/lib/ucf/hashfile.tmp
    grep "$configfile" /var/lib/ucf/hashfile | tail -n 1  >> /var/lib/ucf/hashfile.tmp
    mv /var/lib/ucf/hashfile.tmp /var/lib/ucf/hashfile
  fi
}

add_to_ucf()
{
  configfile=$1
  ucffile=$2

  if ! grep -q "$configfile" /var/lib/ucf/hashfile; then
    md5sum $configfile >> /var/lib/ucf/hashfile
    cp $configfile $ucffile
  fi
}

ucf_upgrade_check()
{
  configfile=$1
  sourcefile=$2
  ucffile=$3

  if [ -f "$configfile" ]; then
    add_to_ucf $configfile $ucffile
    ucf --three-way --debconf-ok "$sourcefile" "$configfile"
  else
    [ -d /var/lib/ucf/cache ] || mkdir -p /var/lib/ucf/cache
    pathfind restorecon && restorecon /var/lib/ucf/cache
    cp $sourcefile $configfile
    add_to_ucf $configfile $ucffile
  fi
}

slurp_config()
{
  CLAMAVCONF="$1"
  
  if [ -e "$CLAMAVCONF" ]; then
    for variable in `egrep -a -v '^[[:space:]]*(#|$)' "$CLAMAVCONF" | awk '{print $1}'`; do
      case "$variable" in
        DatabaseMirror)
        if [ -z "$DatabaseMirror" ]; then
          for i in `grep -a ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$value $i"
          done
        else
          continue
        fi
        ;;
        DatabaseCustomURL)
        if [ -z "$DatabaseCustomURL" ]; then
          for i in `grep -a ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$value $i"
          done
        else
          continue
        fi
        ;;
        IncludePUA)
        if [ -z "$IncludePUA" ]; then
          for i in `grep -a ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$i $value"
          done
        else
          continue
        fi
        ;;
        ExcludePUA)
        if [ -z "$ExcludePUA" ]; then
          for i in `grep -a ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$i $value"
          done
        else
          continue
        fi
        ;;
        ExtraDatabase)
        if [ -z "$ExtraDatabase" ]; then
          for i in `grep -a ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$value $i"
          done
        else
          continue
        fi
        ;;
        VirusEvent|OnUpdateExecute|OnErrorExecute|RejectMsg)
        value=`grep -a ^$variable $CLAMAVCONF | head -n1 | sed -e s/$variable\ //`
        ;;
        *)
        value=`grep -a "^$variable[[:space:]]" $CLAMAVCONF | head -n1 | awk '{print $2}'`
        ;;
      esac
      if [ -z "$value" ]; then 
        export "$variable"="true"
      elif [ "$value" != "$variable" ]; then
        export "$variable"="$value"
      else
        export "$variable"="true"
      fi
      unset value
    done
  fi
}

pathfind() {
  OLDIFS="$IFS"
  IFS=:
  for p in $PATH; do
    if [ -x "$p/$*" ]; then
      IFS="$OLDIFS"
      return 0
    fi
  done
  IFS="$OLDIFS"
  return 1
}

set_debconf_value()
{
prog=$1
name=$2
eval variable="\$${name}"
if [ -n "$variable" ]; then
  db_set clamav-$prog/$name "$variable" || true
fi
}

make_dir()
{
  DIR=$1
  if [ -d "$DIR" ]; then
    return 0;
  fi
  [ -n "$User" ] || User=clamav
  mkdir -p -m 0755 "$DIR"
  chown "$User" "$DIR"
  pathfind restorecon && restorecon "$DIR"
}

# Debconf Functions

isdigit ()
{
  case $1 in
    [[:digit:]]*)
    ISDIGIT=1
    ;;
    *)
    ISDIGIT=0
    ;;
  esac
}

inputdigit ()
{
  ISDIGIT=0
  while [ "$ISDIGIT" = '0' ]; do
    db_input "$1" "$2" || true
    if ! db_go; then
      return 30
    fi
    db_get $2 || true
    isdigit $RET
    if [ "$ISDIGIT" = '0' ]; then
      db_input critical clamav-base/numinfo || true
      db_go
    fi
  done
  return 0
}

StateGeneric()
{
  PRIO=$1
  QUESTION=$2
  NEXT=$3
  LAST=$4

  db_input $PRIO $QUESTION || true
  if db_go; then
    STATE=$NEXT
  else
    STATE=$LAST
  fi
}

StateGenericDigit()
{
  PRIO=$1
  QUESTION=$2
  NEXT=$3
  LAST=$4

  inputdigit $PRIO $QUESTION || true
  if db_go; then
    STATE=$NEXT
  else
    STATE=$LAST
  fi
}


CLAMAVMILTERCONF='/etc/clamav/clamav-milter.conf'

slurp_config "$CLAMAVMILTERCONF"


# Store conf file values as debconf answers - make sure user changes made 
# outside of debconf are preserved
set_debconf_value milter MilterSocket
set_debconf_value milter FixStaleSocket
set_debconf_value milter MilterSocketGroup
set_debconf_value milter MilterSocketMode
if [ -n "$User" ]; then
  db_set clamav-milter/User "$User" || true
  if ! [ "$User" = 'root' ]; then
    AddGroups=`groups "$User" | awk -F ':' '{print $2}' | sed -e s/"$User"//`
  fi
  if [ -n "$AddGroups" ]; then
    db_set clamav-milter/AddGroups "$AddGroups" || true
  fi
fi
set_debconf_value milter ReadTimeout
set_debconf_value milter Foreground
set_debconf_value milter Chroot
if [ -n "$PidFile" ]; then
  db_set clamav-milter/PidFile "$PidFile" || true
fi
set_debconf_value milter TemporaryDirectory
if [ -n "$ClamdSocket" ]; then
  db_set clamav-milter/ClamdSocket "$ClamdSocket" || true
fi
set_debconf_value milter LocalNet
set_debconf_value milter Whitelist
set_debconf_value milter OnInfected
set_debconf_value milter OnFail
set_debconf_value milter RejectMsg
set_debconf_value milter AddHeader
set_debconf_value milter LogFile
set_debconf_value milter LogFileUnlock
set_debconf_value milter LogFileMaxSize
set_debconf_value milter LogTime
set_debconf_value milter LogSyslog
set_debconf_value milter LogFacility
set_debconf_value milter LogVerbose
set_debconf_value milter LogInfected
set_debconf_value milter LogClean
if [ -n "$MaxFileSize" ]; then
  MaxFileSize="`echo $MaxFileSize | sed -e s/M//g`"
else
  MaxFileSize=25
fi
db_set clamav-milter/MaxFileSize "$MaxFileSize" || true
set_debconf_value milter SupportMultipleRecipients
set_debconf_value milter LogRotate


# States

StateDebconf()
{
  db_input medium clamav-milter/debconf || true
  if ! db_go; then
    STATE="End"
  else
    db_get clamav-milter/debconf || true
    if [ "$RET" = "false" ]; then
      STATE="End"
    else
      STATE="User"
    fi
  fi
}

StateUser()
{
  db_input medium clamav-milter/User || true
  if db_go; then
    db_metaget clamav-milter/User value
    if [ "$RET" = "" ]; then
      db_set clamav-milter/User "clamav" || true
    fi
    STATE="AddGroups"
  else
    STATE="Debconf"
  fi
}

StateMilterSocketGroup()
{
  db_input low clamav-milter/MilterSocketGroup || true
  if db_go; then
    db_metaget clamav-milter/MilterSocketGroup value
    if [ "$RET" = "" ]; then
      db_set clamav-milter/MilterSocketGroup "clamav" || true
    fi
    STATE="MilterSocketMode"
  else
    STATE="MilterSocket"
  fi
}

StateLogFile()
{
  db_input low clamav-milter/LogFile || true
  if db_go; then
    db_metaget clamav-milter/LogFile value
    if [ "$RET" = "" ]; then
      db_set clamav-milter/LogFile "/var/log/clamav/clamav-milter.log" || true
      STATE="LogFileUnlock"
    elif [ "$RET" = 'none' ]; then
      db_set clamav-milter/LogFile "" || true
      STATE="LogSyslog"
    else
      STATE="LogFileUnlock"
    fi
  else
    STATE="AddHeader"
  fi
}

# To many options to configure at configure
if [ "$1" = "reconfigure" ]; then
  STATE="Init"
elif [ -n "$2" ]; then
  if [ -z "$User" ]; then
    STATE="User"
  fi
else
  STATE="End"
fi

[ -z "$STATE" ] && STATE='End'

# This is the statemachine that controls execution. All the 'real' work is 
# performed by subfunctions above. 

while [ "$STATE" != "End" ]; do
  case "$STATE" in
    "Init")
    StateDebconf
    ;;
    "User")
    StateUser
    ;;
    "AddGroups")
    StateGeneric medium clamav-milter/AddGroups MilterSocket User
    ;;
    "MilterSocket")
    StateGeneric low clamav-milter/MilterSocket MilterSocketGroup AddGroups
    ;;
    "MilterSocketGroup")
    StateMilterSocketGroup
    ;;
    "MilterSocketMode")
    StateGenericDigit low clamav-milter/MilterSocketMode FixStaleSocket MilterSocketGroup
    ;;
    "FixStaleSocket")
    StateGeneric low clamav-milter/FixStaleSocket ReadTimeout MilterSocketMode
    ;;
    "ReadTimeout")
    StateGenericDigit low clamav-milter/ReadTimeout Foreground FixStaleSocket
    ;;
    "Foreground")
    StateGeneric low clamav-milter/Foreground Chroot ReadTimeout
    ;;
    "Chroot")
    StateGeneric low clamav-milter/Chroot PidFile Foreground
    ;;
    "PidFile")
    StateGeneric low clamav-milter/PidFile TemporaryDirectory Chroot
    ;;
    "TemporaryDirectory")
    StateGeneric low clamav-milter/TemporaryDirectory ClamdSocket PidFile
    ;;
    "ClamdSocket")
    StateGeneric low clamav-milter/ClamdSocket LocalNet TemporaryDirectory
    ;;
    "LocalNet")
    StateGeneric low clamav-milter/LocalNet Whitelist ClamdSocket
    ;;
    "Whitelist")
    StateGeneric low clamav-milter/Whitelist OnInfected LocalNet
    ;;
    "OnInfected")
    StateGeneric low clamav-milter/OnInfected OnFail Whitelist
    ;;
    "OnFail")
    StateGeneric low clamav-milter/OnFail RejectMsg OnInfected
    ;;
    "RejectMsg")
    StateGeneric low clamav-milter/RejectMsg AddHeader OnFail
    ;;
    "AddHeader")
    StateGeneric low clamav-milter/AddHeader LogFile RejectMsg
    ;;
    "LogFile")
    StateLogFile
    ;;
    "LogFileUnlock")
    StateGeneric low clamav-milter/LogFileUnlock LogFileMaxSize LogFile
    ;;
    "LogFileMaxSize")
    StateGenericDigit low clamav-milter/LogFileMaxSize LogTime LogFileUnlock
    ;;
    "LogTime")
    StateGeneric low clamav-milter/LogTime LogSyslog LogFileMaxSize
    ;;
    "LogSyslog")
    StateGeneric low clamav-milter/LogSyslog LogFacility LogTime
    ;;
    "LogFacility")
    StateGeneric low clamav-milter/LogFacility LogVerbose LogSyslog
    ;;
    "LogVerbose")
    StateGeneric low clamav-milter/LogVerbose LogInfected LogFacility
    ;;
    "LogInfected")
    StateGeneric low clamav-milter/LogInfected LogClean LogVerbose
    ;;
    "LogClean")
    StateGeneric low clamav-milter/LogClean MaxFileSize LogInfected
    ;;
    "MaxFileSize")
    StateGenericDigit low clamav-milter/MaxFileSize SupportMultipleRecipients LogClean
    ;;
    "SupportMultipleRecipients")
    StateGeneric low clamav-milter/SupportMultipleRecipients LogRotate MaxFileSize
    ;;
    "LogRotate")
    StateGeneric low clamav-milter/LogRotate End SupportMultipleRecipients
    ;;
  esac
done
db_stop || true
exit 0