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#!/bin/sh
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#
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# lsh-utils     Start/stop secure shell server.
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#               Written by Timshel Knoll <timshel@debian.org>
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#               Updated by Stefan Pfetzing <dreamind@dreamind.de>
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#               Updated by Magnus Holmgren <magnus@debian.org>
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### BEGIN INIT INFO
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# Provides:          lsh-server
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# Required-Start:    $local_fs $remote_fs $syslog $named $network
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# Required-Stop:     $local_fs $remote_fs $syslog $named $network
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# X-Start-Before:    cman drbd smokeping vz
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# X-Stop-After:      cman drbd smokeping vz
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# Default-Start:     2 3 4 5
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# Default-Stop:      0 1 6
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# Short-Description: lsh secure shell server
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### END INIT INFO
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PATH=/sbin:/bin:/usr/sbin:/usr/bin
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DAEMON=/usr/sbin/lshd
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NAME=lshd
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DESC="secure shell v2 server"
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CONFIG=/etc/default/lsh-server
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PIDFILE=/var/run/$NAME.pid
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RANDOM_SEED="/var/spool/lsh/yarrow-seed-file"
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HOST_KEY="/etc/lsh_host_key"
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test -f $DAEMON || exit 0
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. /lib/lsb/init-functions
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set +e
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if [ -r "$CONFIG" ]; then
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   . "$CONFIG"
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fi
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if [ x"$LSHD_PORT" = x ]; then
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   LSHD_PORT="22"
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fi
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case "$ENABLE_SFTP" in
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  true|y*|Y*)
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    SFTP_FLAG="--subsystems sftp=/usr/lib/lsh-server/sftp-server"
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    ;;
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  *)
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    SFTP_FLAG=""
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    ;;
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esac
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create_seed_and_key() {
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   if [ ! -f "$RANDOM_SEED" ]; then
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      log_action_begin_msg "Creating lsh random seed file (this only needs to be done once)"
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      DIR=$(dirname "$RANDOM_SEED")
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      if install -d -m 700 "$DIR" &&
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          dd if=/dev/random "of=$RANDOM_SEED" bs=1 count=32 2>/dev/null &&
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          chmod 600 "$RANDOM_SEED"; then
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          log_action_end_msg 0
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      else
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          log_action_end_msg 1
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          exit 1
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      fi
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   fi
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   if [ ! -f "$HOST_KEY" ]; then
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      log_action_begin_msg "Creating lsh host key (this only needs to be done once)"
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      lsh-keygen --server | lsh-writekey --server --output-file "$HOST_KEY"
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      if [ ! -f "$HOST_KEY" ]; then
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         log_action_end_msg 1
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         exit 1
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      fi
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      log_action_end_msg 0
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   fi
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}
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case "$1" in
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  start)
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        create_seed_and_key
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        log_daemon_msg "Starting $DESC" "$NAME"
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        start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON \
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                          -- --daemonic --port "$LSHD_PORT" $SFTP_FLAG
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        log_end_msg $?
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        ;;
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  stop|graceful-stop)
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        log_daemon_msg "Gracefully stopping $DESC" "$NAME"
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        # Signal 1 causes the "old" lsh to close up shop on its port, but
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        # keeps running until all active connections have been closed
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        start-stop-daemon --stop --retry HUP/1 --quiet --pidfile $PIDFILE \
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            --oknodo --exec $DAEMON
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        log_end_msg $?
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        ;;
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  restart|force-reload)
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        create_seed_and_key
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        log_daemon_msg "Restarting $DESC" "$NAME"
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        start-stop-daemon --stop --retry HUP/1 --quiet --pidfile $PIDFILE \
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            --oknodo --exec $DAEMON &&
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        start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON \
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                       -- --daemonic --port "$LSHD_PORT" $SFTP_FLAG
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        log_end_msg $?
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        ;;
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  status)
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        status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
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        ;;
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  *)
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        echo "Usage: /etc/init.d/lsh-utils {start|stop|restart|force-reload}" >&2
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        exit 3
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        ;;
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esac