ntp_shavail

#!/usr/bin/env ksh

# Sat Aug 15 13:33:59 CEST 2015
# Wednesday, August 19, 2015 03:42:24 PM CEST - mayer 
# Sun Aug 23 20:03:01 CEST 2015 - mayer - bugfix endless loop
# Sat Feb  6 20:13:51 CET 2016 - mayer - bugfix for date eq - ( yesterday ) 
# Thu Sep 22 15:00:47 CEST 2016 - mayer - using /usr/bin/env ksh
# Thu Sep 22 16:44:24 CEST 2016 - mayer - getent not availavle on OS X 
# Sat Jan 28 21:26:21 CET 2017 - mayer - debug option Z with argument 1 or 9
# Sun Apr 16 12:12:11 CEST 2017 - mayer - option n / noselect
# Friday, June 30, 2017 10:22:31 AM CEST - mayer - rm NOTSELECTED
# Tue Aug 15 20:25:07 CEST 2017 - mayer - bugfix $do_once


export DISPLAY AWK STATSDIR PEERSTATS SELDATE CONF YEAR MINARGS TMPIPADDR SEDARG LIST STERM 
export TMP1 TITLE1 TITLE2 YLABEL HOSTN MYADDR LOOPCNT DEBUGOPT NOSELECT NOTSELECTED H SRV NOSELHOST


AWK=gawk
YEAR=`TZ=GMT date '+%Y'`
DEBUG=n
MINARGS=1
TMPIPADDR=/tmp/...tmpipaddr.$$
LIST=/tmp/erg.dat.$$
STERM="set term x11 persist"
NOTSELECTED=/tmp/...ntp_shav_notselected 
NOSELECT=n

thisusage(){
    echo
    echo "show NTP available peers as graph  - v 2017 08 15 "
    echo "  author: ntpgraph@ma.yer.at "
    echo "  source: https://github.com/hans-mayer/ntpgraph "
    echo
    echo "usage: $0 [ -n ] [ -D 1|9 ] [ -f IMG ] DATE "
    echo "       date is MMDD in year $YEAR or YYYYMMDD or . or - ( . is today, - is yesterday  ) " 
    echo "       -f IMG      - output to file - IMG can be jpeg, png, ... "
    echo "       -n          - don't take server marked as noselect "  
    echo "       -D 1|9      - debug  1 ... less, 9 ... more "
    echo
    exit 1
}

# check the arguments
LOOPCNT=0
# go at least 1 time into the loop / there is no do until
do_once=1
while test $# -gt $MINARGS -o $do_once -eq 1
  do
    do_once=0
    case $1 in
      -D ) DEBUG=y ; shift ; DEBUGOPT=$1 ; shift ;;
      -f ) FILE="set output \"plot_$$.$2\" "
           STERM="set terminal $2 size 900,500"
           LINEWIDTH=1
           echo $FILE ; shift ; shift ;;
      -n ) NOSELECT=y ; shift ;;
      - )  break ;;  # yesterday
      -* ) thisusage ; exit 1 ;;
    esac
    if test $# -lt $MINARGS
      then
        thisusage
        exit 1
    fi
    LOOPCNT=$((LOOPCNT+1))
    # check if we are not running into an endless loop
    if test "$LOOPCNT" -gt 30
      then
        thisusage
        exit 1
    fi
  done

if test "$DEBUGOPT" -eq 9
  then
    set -x
fi


if test $# -eq 1
  then
    MDATE=$1
  else
    thisusage
    exit 1
fi


# very rudimentary check of date
case "$MDATE" in
  [0-9\?][0-9\?][0-9\?][0-9\?] )
        SELDATE=$YEAR$MDATE ;;
  [12][90][0-9\?][0-9\?][0-9\?][0-9\?][0-9\?][0-9\?] )
        SELDATE=$MDATE ;;
  \. )  SELDATE=`TZ=GMT date +%Y%m%d` ;;
  - )   SELDATE=`TZ=GMT+24 date +%Y%m%d` ;;
  * )   echo $0: wrong date format - must be MMDD or . 1>&2
        thisusage
        exit 1
        ;;
esac

if test -z "$FILE"
  then
    # check if DISPLAY is set ?
    case "$DISPLAY" in
      localhost:* ) ;;
      "" )  echo '$DISPLAY not set' ; exit 1 ;;
      * ) ;;
    esac
fi

# check if gawk is available
type $AWK > /dev/null
if test $? -ne 0
  then
    echo try to install $AWK
    echo if not available try a symlink to awk or change this script
    exit 1
fi

# check where the conf file is located
CONF=N
if test -f /etc/ntp.conf
  then
    CONF=/etc/ntp.conf
fi
if test -f /etc/inet/ntp.conf
  then
    CONF=/etc/inet/ntp.conf
fi
if test $CONF = N
  then
    echo $0: ntp.conf not found
    exit 1
fi

# look what is statsdir directory and peerstats file defined
# awk is needed for solaris to strip off the leading blanks
STATSDIR=`grep statsdir $CONF | grep -v '^#' | tr '""' '  ' | head -1 | $AWK '{ print ( $2 ) }'`
PEERSTATS=`grep filegen $CONF | grep peerstats | grep -v '^#' | head -1 | $AWK '{ print ( $4 ) }'`
PEERSTATS=${PEERSTATS:-peerstats} # in case filegen keyword not found

if test "$DEBUG" == y
  then
    echo CONF $CONF
    echo STATSDIR $STATSDIR PEERSTATS $PEERSTATS.$SELDATE
    echo TMPIPADDR $TMPIPADDR
    echo NOTSELECTED $NOTSELECTED
fi

if test ! -f $STATSDIR/${PEERSTATS}.$SELDATE
  then
    echo $0: file $STATSDIR/${PEERSTATS}.$SELDATE not found
    exit 1
fi

# OS X doesn't have getent 
type getent > /dev/null 2>&1 

if test $? -ne 0 -a $NOSELECT = y 
  then 
    echo option noselect -n disabled as program getent is not available 
    echo if this is macOS from Apple try to get an emulated script for example from 
    echo https://github.com/petere/getent-osx.git 
    NOSELECT=n 
fi

rm -f $NOTSELECTED
if test $NOSELECT = y
  then 
    # create a list if IP which we do not show 
    NOSELHOST=`egrep '^server .* noselect' $CONF | $AWK '{ print $2 }'` 
    if test -n "$NOSELHOST" 
      then 
        echo "$NOSELHOST" | while read SRV 
          do
            # mac os x doesn't have getent - so option -n will not work 
            # H is empty if it's an ip and no reverse lookup available 
            H=`getent hosts $SRV 2> /dev/null`
            if test -z "$H" 
              then 
                echo $SRV >> $NOTSELECTED
              else 
                echo $H | $AWK '{ print $1 }' >> $NOTSELECTED 
            fi 
          done
      else 
        echo $0: there are no noselected hosts found 
        # any string which could not be a server name for grep -v 
        echo we_take_all_servers > $NOTSELECTED 
    fi
  else 
    echo we_take_all_servers > $NOTSELECTED 
fi 


cat $STATSDIR/${PEERSTATS}.$SELDATE | fgrep -v -f $NOTSELECTED | \
  $AWK '{ print ( $3 ) }' | sort -u | $AWK '{ print ( $1 , NR ) }' | \
    while read IP IND 
      do 
        # if getent does not exist $HOST1 is empty
        echo $IP $IND `getent hosts $IP 2> /dev/null |  $AWK '{ print ( $2 ) }'`
      done > $TMPIPADDR
# max ip found + 1 
YRANGE=`wc -l $TMPIPADDR | $AWK '{ print ( "[0.8:" $1 + 1 "]" ) }'`
TITLE1=`cat $TMPIPADDR  | $AWK '{ print ( $2 ":" , $1 ) }' | tr "\n" " "`
# find the DNS name for each host 
TMP1=`cat $TMPIPADDR | \
while read IP INDEX NAM
  do 
    if test -z "$NAM"
      then
        case "$IP" in
          127.127.22.* ) echo "$INDEX: PPS " ;;
          127.127.28.* ) echo "$INDEX: GPS " ;;
        esac
      else
        getent hosts $IP | $AWK -v INDEX=$INDEX '{ print ( INDEX ":" , $2 , " " ) }'
    fi
  done `
# now remove the line breaks 
TITLE2=`echo $TMP1` 

MYADDR=`ifconfig -a | grep inet | egrep -v '::1/128|127.0.0.1|inet6' | head -1 | $AWK '{ print $2 }'`
HOSTN=`hostname`

# replace IP address by index number 
SEDARG=`cat $TMPIPADDR | $AWK '{ print ( "-e s/" $1 "/" $2 "/" ) }'` 

# first host has number 1 
# for peer status word see https://www.eecis.udel.edu/~mills/ntp/html/decode.html#peer
# if host 1 is system peer then it gets value 1.6 

sed $SEDARG < $STATSDIR/${PEERSTATS}.$SELDATE | $AWK '{ print ( $2, $3, $4 ) }' | \
  $AWK '{ print ( $1 , $2 , substr ( $3, 2, 1 ) ) }' | \
  $AWK '{ printf ( "%.4f %.2f \n", $1/3600, $2 + $3/10 ) }' > $LIST

YLABEL='.0 reject  /  .1 x falsetick  /  .3 - outlyer \n.4 + candidate  /  .5 # backup  /  .6 * peer  /  .7 o pps '

gnuplot << EOF
  $STERM
  $FILE
  set title "$SELDATE\n$TITLE1\n$TITLE2"
  set xlabel "hour"
  set ylabel "$YLABEL" 
  set yrange $YRANGE
  set xtics 1
  set ytics 0.2
  set xrange [-0.5:24.8]
  plot "$LIST" using 1:2 title "$HOSTN - $MYADDR" 
EOF

rm -f $NOTSELECTED

if test "$DEBUG" == y
  then
    echo plotfile: $LIST
    cat $TMPIPADDR
  else
    rm -f $LIST $TMPIPADDR 
fi

exit 0