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Editing: S01clamav-daemon

#! /bin/sh
#		Written by Miquel van Smoorenburg <miquels@cistron.nl>.
#		Modified for Debian GNU/Linux
#		by Ian Murdock <imurdock@gnu.ai.mit.edu>.
#               Clamav version by Magnus Ekdahl <magnus@debian.org>
#               Heavily reworked by Stephen Gran <sgran@debian.org>
#
### BEGIN INIT INFO
# Provides:          clamav-daemon
# Required-Start:    $remote_fs $syslog
# Should-Start:      
# Required-Stop:     $remote_fs $syslog
# Should-Stop:       
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: ClamAV daemon
# Description:       Clam AntiVirus userspace daemon
### END INIT INFO

# The exit status codes should comply with LSB.
# https://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/clamd
NAME="clamd"
DESC="ClamAV daemon"
CLAMAVCONF=/etc/clamav/clamd.conf
SUPERVISOR=/usr/bin/daemon
SUPERVISORNAME=daemon
SUPERVISORPIDFILE="/var/run/clamav/daemon-clamd.pid"
SUPERVISORARGS="--name=$NAME --respawn $DAEMON -F $SUPERVISORPIDFILE"
DATABASEDIR="/var/lib/clamav"

# required by Debian policy 9.3.2
[ -x "$DAEMON" ] || exit 0
[ -r /etc/default/clamav-daemon ] && . /etc/default/clamav-daemon

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
}

. /lib/lsb/init-functions

if [ ! -f "$CLAMAVCONF" ]; then
  log_failure_msg "There is no configuration file for Clamav."
  log_failure_msg "Please either dpkg-reconfigure $DESC, or copy the example from"
  log_failure_msg "/usr/share/doc/clamav-base/examples/ to $CLAMAVCONF and run"
  log_failure_msg "'invoke-rc.d clamav-daemon start'"
  if [ "$1" = "status" ]; then
    # program or service status is unknown
    exit 4;
  else
    # program is not configured
    exit 6;
  fi
fi

slurp_config "$CLAMAVCONF"

if [ -n "$Example" ]; then
  log_failure_msg "Clamav is not configured."
  log_failure_msg "Please edit $CLAMAVCONF and run  'invoke-rc.d clamav-daemon start'"
  if [ "$1" = "status" ]; then
    # program or service status is unknown
    exit 4;
  else
    # program is not configured
    exit 6;
  fi
fi

if is_true "$Foreground"; then
  if [ ! -x "$SUPERVISOR" ] ; then
     log_failure_msg "Foreground specified, but $SUPERVISORNAME not found"
    if [ "$1" = "status" ]; then
      # program or service status is unknown
      exit 4;
    else
      # program is not configured correctly
      exit 6;
    fi
  else
     RUN_SUPERVISED=1
  fi
fi

[ -n "$User" ] || User=clamav
[ -n "$DataBaseDirectory" ] || DataBaseDirectory=/var/run/clamav

make_dir "$DataBaseDirectory"
make_dir $(dirname "$SUPERVISORPIDFILE")

if [ -z "$RUN_SUPERVISED" ]; then
	THEPIDFILE="$PidFile"
	THEDAEMON="$NAME"
	RELOAD="1"
else
	THEPIDFILE="$SUPERVISORPIDFILE"
	THEDAEMON="$SUPERVISORNAME"
	RELOAD="0"
fi

if [ -z "$THEPIDFILE" ]
then
  # Set the default PidFile.
  THEPIDFILE='/run/clamav/clamd.pid'
fi

make_dir $(dirname "$THEPIDFILE")
chown $User $(dirname "$THEPIDFILE")

case "$1" in
  start)
  # Check for database existence (start will fail if it's missing)
  for db in main daily; do
    if [ ! -e "$DATABASEDIR"/"$db".cvd ] && [ ! -d "$DATABASEDIR"/"$db".inc ] && [ ! -e "$DATABASEDIR"/"$db".cld ]; then
      log_failure_msg "Clamav signatures not found in $DATABASEDIR"
      log_failure_msg "Please retrieve them using freshclam"
      log_failure_msg "Then run 'invoke-rc.d clamav-daemon start'"
      # this is expected on a fresh installation
      exit 0
    fi
  done
  if [ -z "$RUN_SUPERVISED" ] ; then
    log_daemon_msg "Starting $DESC" "$NAME "
    start-stop-daemon --start --oknodo -c $User --exec $DAEMON --pidfile $THEPIDFILE --quiet -- -c $CLAMAVCONF --pid=$THEPIDFILE
    ret=$?
  else 
    log_daemon_msg "Starting $DESC" "$NAME (supervised) "
    $SUPERVISOR $SUPERVISORARGS
    ret=$?
  fi
  log_end_msg $ret
  ;;
  stop)
  log_daemon_msg "Stopping $DESC" "$NAME"
  start-stop-daemon --stop --oknodo --name $THEDAEMON --pidfile $THEPIDFILE --quiet --retry TERM/30/KILL/5
  log_end_msg $?
  ;;
  status)
  start-stop-daemon --status --name $THEDAEMON --pidfile $THEPIDFILE
  # start-stop-daemon returns LSB compliant exit status codes
  ret=$?
  if [ "$ret" = 0 ]; then
      log_success_msg "$NAME is running"
  else
      log_failure_msg "$NAME is not running"
      exit "$ret"
  fi
  ;;
  restart|force-reload)
  $0 stop
  $0 start
  ;;
  reload-database)
  if [ "$RELOAD" = "1" ]; then
    log_daemon_msg "Reloading database for $DESC" "$NAME"
    pkill -USR2 -F $THEPIDFILE $THEDAEMON 2>/dev/null
    log_end_msg $?
  else
    log_failure_msg "reload-database does not work in supervised mode."
    # unimplemented feature
    exit 3
  fi
  ;;
  reload-log)
  if [ "$RELOAD" = "1" ]; then
    log_daemon_msg "Reloading log file for $DESC" "$NAME"
    pkill -HUP -F $THEPIDFILE $THEDAEMON 2>/dev/null
  else
    log_failure_msg "reload-log does not work in supervised mode."
    # unimplemented feature
    exit 3
  fi
  log_end_msg $?
  ;;
  *)
  log_action_msg "Usage: $0 {start|stop|restart|force-reload|reload-log|reload-database|status}" >&2
  # invalid arguments
  exit 2
  ;;
esac

exit 0

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Editing: S01clamav-daemon