drbl 2.6.15-1 / usr / bin / drbl-doit

#!/bin/bash
# Author: Blake, Kuo-Lien Huang and Steven Shiau <steven _at_ nchc org tw>
# License: GPL
# Description: send commands to drbl clients
#

# Load DRBL setting and functions
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"

. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions

# some userful function
USAGE() {
  echo "Usage: `basename $0` Options [command]"
  echo "Options:"
   langue_help_prompt_by_idx_no
  echo "-b, --batch       Batch mode, same with -n/--no-ping"
  echo "-h, --hosts IP_LIST  Instead of all DRBL clients, assign the clients by IP address, like: -h \"192.168.0.1 192.168.0.2\" NOTE!!! You must put \" \" before and after the IP_LIST!"
  echo "-n, --no-ping     Do NOT ping machine to check if hosts is alive before running command"
  echo "-p, --password PASSWD  Assign the plain text password of the USER (option -u|--user) to be used. //NOTE// This is not secure. It's recommended to avoid using this option. Better to use the ssh public key method."
  echo "-u, --user USER   Execute command on all drbl clients as username USER"
  echo "-v, --verbose:    Verbose mode."
  echo "-w, --wol         Use Wake On LAN to wake up all drbl clients (Clients must be soft shutdown"
  echo "Examples:"
  echo "  To poweroff all DRBL clients"
  echo "  `basename $0` -u root /sbin/poweroff"
  echo "  To reboot all Cygwin clients, use"
  echo "  `basename $0` -u Administrator /usr/bin/reboot -f now"
}

# main
[ $# -eq 0 ] && USAGE && exit 1

# Parse command
while [ $# -gt 0 ]; do
  case "$1" in
    -l|--language)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  specified_lang="$1"
	  shift
        fi
        [ -z "$specified_lang" ] && USAGE && exit 1
	;;
    -w|--wol)
	shift; mode="WOL" ;;
    -h|--hosts)
	LIST_HOST="on"
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  IP_LIST="$1"
	  shift
        fi
        [ -z "$IP_LIST" ] && USAGE && exit 1
	;;
    -u|--user)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  specified_user="$1"
	  shift
        fi
        [ -z "$specified_user" ] && USAGE && exit 1
	;;
    -p|--password)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  specified_passwd="$1"
	  shift
        fi
        [ -z "$specified_passwd" ] && USAGE && exit 1
	;;
    -n|--no-ping|-b|--batch)
	shift; ping="no" ;;
    -v|--verbose)
	shift; verbose="on" ;;
    -*)	echo "${0}: ${1}: invalid option" >&2
	USAGE >& 2
	exit 2 ;;
    *)	break ;;
  esac
done

# get the command
CMD=$1
[ -n "$verbose" ] && echo "CMD:$CMD"
[ -n "$verbose" ] && echo "specified_user: $specified_user"

#
ask_and_load_lang_set $specified_lang

# The reasone we do not to use $HOME is that sudo will not change 
# environmental variable $HOME, but it will change the $USER
# we need to know who is really running this after applying sudo.
# say, sudo echo "$HOME", it will show user's home, instead of root's home, 
REALHOME=$(LC_ALL=C grep -Ew "^$USER" /etc/passwd | cut -d":" -f6)

# get client IP lists
drbl_client_list="$(LC_ALL=C get-client-ip-list)"

#
case "$mode" in
  "WOL")
    ## Wake on LAN (--wol)
    broadcast_address="255.255.255.255"
    echo -n "Parsing the $DHCPDCONF_DIR/dhcpd.conf..."
    WOL_TMP=`mktemp /tmp/wol_tmp.XXXXXX`
    trap "[ -f "$WOL_TMP" ] && rm -f $WOL_TMP" 0 1 2 5 15
    parse_dhcpd_conf $WOL_TMP
    echo "done!"
    # find the interfaces for the wake-on-lan packet to be sent, in DRBL, only
    # private IP address is used to connect to client

    # only root can update arp data
    if [ "$UID" = "0" ]; then
      # Dave Haakenhout suggests to create the static ethers files so that
      # the arp can work.
      echo -n "Creating the /etc/ethers... "
      if [ -f /etc/ethers ]; then
        echo -n "Backup the original /etc/ethers as /etc/ethers.orig... "
        mv -f /etc/ethers /etc/ethers.orig
      fi
      # skip those comment lines
      (grep "^[^#]" $WOL_TMP; echo ) | # make sure there is a LF at the end
      while read host ip mac; do
        echo $mac $ip >> /etc/ethers
      done
      echo -n "Reading the ARP address mapping... "
      arp -f /etc/ethers
      echo "done!"
    fi

    for ihost in $drbl_client_list; do
      # skip those IP not listed in the $IP_LIST
      if [ "$LIST_HOST" = "on" ]; then
        [ -z "$(echo $IP_LIST | grep -E "\<$ihost\>")" ] && continue
      fi
      ethernet_address="$(grep -E "${ihost}\>" $WOL_TMP | awk -F" " '{print $3}')"
      echo "-------------------------------------------------------------------"
      if [ -n "$ethernet_address" ]; then
        # find the etherwake/ether-wake program first. For FC: ether-wake, for Debian: etherwake.
	if type etherwake &>/dev/null; then
           ETH_WAKE="etherwake"
	elif type ether-wake &>/dev/null; then
           ETH_WAKE="ether-wake"
        else
           ETH_WAKE=""
	fi
        # use etherwake/ether-wake for the 1st priority, but it need to be root to run it
        if [ -n "$ETH_WAKE" ] && [ "$UID" = "0" ]; then
          # find the ether port, we can find it from the routing table
          # 1st, find the subnet: 192.168.1.x -> 192.168.1
          IP_grp_1_3="$(LC_ALL=C echo $ihost | sed -e "s/\.[[:digit:]]*$//g")"
          iport="$(LC_ALL=C route -n | grep -E "^$IP_grp_1_3\." | awk -F" " '{print $NF}')"
          echo Running \"$ETH_WAKE -i $iport $ethernet_address\"
          $ETH_WAKE -i $iport $ethernet_address
        else
          echo Running drbl-wakeonlan -i ${ihost} $ethernet_address\"
          drbl-wakeonlan -i ${ihost} $ethernet_address
        fi
      else
         [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
         echo "The MAC address of the specified host ${ihost} NOT found!"
         echo "Do you use the range mode in dhcpd.conf or is there any stale directory in $drblroot/ ?"
         echo "Skip host ${ihost}!"
         [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      fi
    done
    [ -f "$WOL_TMP" ] && rm -f $WOL_TMP

    echo "$msg_delimiter_star_line"
    echo "$msg_wol_0"
    echo "$msg_wol_1"
    echo "$msg_wol_2"
    echo "$msg_wol_3"
    echo "$msg_wol_4"
    echo "$msg_delimiter_star_line"

    exit 0
    ;;
  *)
    # for mode "RUN"...
    [ -z "$CMD" ] && USAGE && exit 1
    true
esac

# create the rsa key if not exists
if [ ! -f $REALHOME/.ssh/id_rsa ]; then
  ssh-keygen -t rsa -q -f $REALHOME/.ssh/id_rsa -N ""
fi

# Put authorized_keys for the user. 2 cases:
# (1). It is root running drbl-doit.
# (2). It is normal user running drbl-doit.
# For root, we will NOT copy authorized_keys in server, since the root in the client should not share the same authorized_keys with that in server. We only put them in the client. (Note! Every client has its own root directory in $ihost/root/)
# For normal user, we let user can ssh login back to server and other machine without password (Note! This is NFS-based home, so we just have to copy id_rsa.pub as authorized_keys in user's home, then no matter which machine user logins, it will use this key).
if [ "$UID" = "0" ]; then
  # for root, copy id_rsa.pub as authorized_keys in clients.
  for ihost in $drblroot/*; do
    if [ -f "$REALHOME/.ssh/id_rsa.pub" ]; then
      mkdir -p $ihost/root/.ssh
      cp -af $REALHOME/.ssh/id_rsa.pub $ihost/root/.ssh/authorized_keys
    fi
  done
else
  if [ -f "$REALHOME/.ssh/id_rsa.pub" ]; then
    cp -af $REALHOME/.ssh/id_rsa.pub $REALHOME/.ssh/authorized_keys
  fi
fi

# if user is not specified, set it as the one who is running this script
[ -z "$specified_user" ] && specified_user="$USER"

#
if [ "$LIST_HOST" = "on" ]; then
 for ihost in $IP_LIST; do
   [ ! -d "$drblroot/$ihost" ] && echo "Can NOT find DRBL client $ihost (i.e. no $drblroot/$ihost)! Assume it's DRBL SSI client."
 done
 [ -n "$verbose" ] && echo "IP_LIST: $IP_LIST"
fi

# Execute the command
for IP in $drbl_client_list; do
  # skip those IP not listed in the $IP_LIST
  if [ "$LIST_HOST" = "on" ]; then
    [ -z "$(echo $IP_LIST | grep -E "\<$IP\>")" ] && continue
  fi
  # check if $IP is myself
  me="$(LC_ALL=C ifconfig | grep "$IP" | cut -d: -f2 | cut -d' ' -f1)"
  if [ "$me" = "" -o "$me" != "$IP" ]; then
    echo "Sending command \"$@\" to $specified_user@$IP..."
    if [ "$ping" = "no" ]; then
      if [ -n "$specified_passwd" ]; then
       if [ -n "$(echo $@ | grep -E "(reboot|poweroff)")" ]; then
         # If command includes reboot or shutdown, redirect the output to /dev/null.
         echo "spawn ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@; expect password:; send $specified_passwd\r; expect eof" | expect -f - &>/dev/null &
       else
         echo "spawn ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@; expect password:; send $specified_passwd\r; expect eof" | expect -f - &
       fi
      else
       if [ -n "$(echo $@ | grep -E "(reboot|poweroff)")" ]; then
         # If command includes reboot or shutdown, redirect the output to /dev/null.
         ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@ &>/dev/null &
       else
         ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@ &
       fi
      fi
    else
      # ping before run command
      if ping -c 2 $IP > /dev/null 2>&1; then
          [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
          echo "$IP is alive... Sending command now..."
          if [ -n "$specified_passwd" ]; then
            if [ -n "$(echo $@ | grep -E "(reboot|poweroff)")" ]; then
              # If command includes reboot or shutdown, redirect the output to /dev/null.
              echo "spawn ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@; expect password:; send $specified_passwd\r; expect eof" | expect -f - &>/dev/null &
            else
              echo "spawn ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@; expect password:; send $specified_passwd\r; expect eof" | expect -f - &
            fi
          else
            if [ -n "$(echo $@ | grep -E "(reboot|poweroff)")" ]; then
              # If command includes reboot or shutdown, redirect the output to /dev/null.
              ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@ &>/dev/null &
            else
              ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $specified_user@$IP $@ &
            fi
          fi
          [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      else
          [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
          echo "$IP is unreachable... Abort command." 
          [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      fi
    fi
  fi
done
# wait for all processes to finish before exit
wait

exit 0