#!/bin/bash
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# $Header: /var/log/sar/RCS/disk,v 1.3 1997/06/19 05:26:48 dgavin Exp dgavin $
#
# disk - display disk I/O
#
# input - /var/log/sar/data/disk.Mondd.yy
# output- chart for each active disk showing r/w and block r/w per second
#
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#
trap '/bin/rm /tmp/gnuplot.disk* 2>/dev/null;exit' SIGHUP SIGINT SIGQUIT SIGTERM
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# Function definitions
#
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function checkForEmpty {
if [ ! -f ${1} ] ; then echo "0 0" >${1} ; fi
return
}
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# Mainline code
#
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#
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# Variable initialization
#
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HARDCOPY=""
GHOSTVIEW=""
CMDNAME=`basename $0`
#
HELP="${CMDNAME} generates X11 or hardcopy graph of disk I/O."
USAGE="${CMDNAME} [-DHLVhPp] [MonDD[.YY]]
  -D turns on execution tracing
  -H displays help info and exits
  -L displays RCS log and exits
  -V display Revision info and exits
  -h displays help info and exits
  -P Print without display
  -p display and offer print option

  MonDD.YY - day to work with, defaults to today
   i.e. Jun12.97 -the year will default to this year

"
#
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# Parse options
#
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#
while getopts DHLVhPp c ; do
  case ${c} in
    h|H) echo -e "\n${HELP}\n\n${USAGE}\n"
       exit 1
       ;;
    p) HARDCOPY="YES"
       GHOSTVIEW="YES"
       ;;
    P) HARDCOPY="YES"
       GHOSTVIEW=""
       ;;
    D) echo "DEBUG ON"
       set -x
       DEBUG="yes"
       trap '' SIGHUP SIGINT SIGQUIT SIGTERM
       ;;
    L) echo '
$Log: disk,v $
Revision 1.3  1997/06/19 05:26:48  dgavin
cleanup
dgavin

Revision 1.2  1997/06/12 03:44:37  dgavin
removed extra log area

Revision 1.1  1997/06/12 03:38:53  dgavin
Initial revision

'
       exit 1
       ;;
    V) echo '$Revision: 1.3 $'
       exit 1
       ;;
    ?) echo -e "\n${USAGE}\n"
       exit 3
       ;;
  esac
done
# re-align the positional parameters as $1, $2,...
shift `expr ${OPTIND} - 1`
#
cd /var/adm/sar/data
if [ $# -eq 0 ] ; then
 FN="disk.`date +%b%d.%y`"
else
 l=`echo ${1} | wc -c`
 l=`expr ${l} + 0`
 case ${l} in
  6) FN="disk.${1}.`date +%y`";;
  9) FN="disk.${1}";;
  *) echo -e "\n${CMDNAME}: Invalid date  - ${1}\n"
     exit
     ;;
 esac
fi
if [ ! -f ${FN} ] ; then
  echo "No such file: ${FN}"
  exit
fi
if [ ! -r ${FN} ] ; then
  echo "File not readable: ${FN}"
  exit
fi
if [ ! -s ${FN} ] ; then
  echo "File empty: ${FN}"
  exit
fi
#      tot - 0 rio    wio    rblk    wblk     1          2          3
#0000  1136068 522777 613291 2781276 1551452  0 0 0 0 0  0 0 0 0 0  0 0 0 0 0 
#0005  1136517 523032 613485 2782710 1552002  0 0 0 0 0  0 0 0 0 0  0 0 0 0 0 
#0010  1139791 524476 615315 2791322 1556448  0 0 0 0 0  0 0 0 0 0  0 0 0 0 0 
rm /tmp/gnuplot.disk* 2>/dev/null
awk '
BEGIN{}
{
 if (NR == 1) {
   mm=substr($1,3,2) * .016;
   tim=substr($1,1,2)+mm;
   old_time = (substr($1,1,2) * 3600) + (substr($1,3,2) * 60);
   tok = split(substr($0,6),old_array);
   disks = int(tok / 5);
   printf("%d disks in database\n",disks);
 } else {
   mm=substr($1,3,2) * .016;
   tim=substr($1,1,2)+mm;
   now = (substr($1,1,2) * 3600) + (substr($1,3,2) * 60);
   delta_tim = now - old_time;
   if(delta_tim < 1 ) { 
     delta_tim = 1;
   }
   if ( array[1] > old_array[1] ) {
     for (i=1;i<=tok;i++){
       old_array[i] = 0;
     }
   } else {
     x = split(substr($0,6),array);
     for ( d = 0; d < disks ; d++ ) {
       printf("%5.2f %7.2f %7.2f %7.2f %7.2f %7.2f\n",
           tim,
           (array[(d*5)+1]-old_array[(d*5)+1])/delta_tim,
           (array[(d*5)+2]-old_array[(d*5)+2])/delta_tim,
           (array[(d*5)+3]-old_array[(d*5)+3])/delta_tim,
           (array[(d*5)+4]-old_array[(d*5)+4])/delta_tim,
           (array[(d*5)+5]-old_array[(d*5)+5])/delta_tim)>"/tmp/gnuplot.disk."d;
     }
   }
   for (i=1;i<=tok;i++){
     old_array[i] = array[i];
   }
   old_time = now;
 }
}
END{ 
  for ( d = 0 ; d < disks ; d++){
    if ( old_array[(d*5)+1] == 0 ) {
      system("/bin/rm /tmp/gnuplot.disk."d);
    }
  }
}' ${FN}
DISKS=`ls -l /tmp/gnuplot.disk.[0-9]* | wc -l`
echo "${DISKS} with non-zero data to be processed"
#
# Get system name and date of report into variables...
system=`hostname -s | /usr/bin/tr "[A-Z]" "[a-z]"`
#sysdate=`/bin/date`
sysdate=`echo ${FN} | cut -c 6-`
echo "Generating plot for $system $sysdate"
#
#
# Start building the /tmp/gnuplot.disk.script
#
if [ -z ${HARDCOPY} ]; then
  TERMINAL="set terminal X11"
  PAUSE="pause 10"
  YLABEL=""
else
  TERMINAL='set terminal postscript landscape monochrome dashed "Times-Roman" 18
set output "/tmp/gnuplot.disk.ps"'
  PAUSE=""
  YLABEL='set ylabel "Disk I/O"'
fi
cat <<EOF >/tmp/gnuplot.disk.script 
${TERMINAL}
set data style lines
set nogrid
set key
set xlabel "Time of Day"
set xrange [00:24]
set xtics 0,1,24
${YLABEL}
set autoscale y
EOF
D=0
while [ ${D} -lt ${DISKS} ] ; do
cat <<EOF >>/tmp/gnuplot.disk.script 
set title "Disk I/O per Second - Disk # ${D} - $system On $sysdate"
plot \
"/tmp/gnuplot.disk.${D}" u 1:2 t "Total i/o per second" with line 1,\
"/tmp/gnuplot.disk.${D}" u 1:3 t "Total reads per second" with line 2,\
"/tmp/gnuplot.disk.${D}" u 1:4 t "Total writes per second" with line 3,\
"/tmp/gnuplot.disk.${D}" u 1:5 t "Total blocks reads per second" with line 4,\
"/tmp/gnuplot.disk.${D}" u 1:6 t "Total blocks writes per second" with line 5
${PAUSE}
EOF
D=`expr ${D} + 1`
done
echo "quit" >>/tmp/gnuplot.disk.script
#
# Generate the plots
#
gnuplot /tmp/gnuplot.disk.script
#
if [ .${HARDCOPY} = ".YES" ]; then
  if [ -z ${GHOSTVIEW} ] ; then
    lpr /tmp/gnuplot.disk.ps
  else
    ghostview -upsidedown -magstep 3 /tmp/gnuplot.disk.ps
    echo "Print ?"
    read ans
    if [ ${ans} = "y" ] ; then
      lpr /tmp/gnuplot.disk.ps
    fi
  fi
fi
# clean up the junk
if [ ${DEBUG}. = "." ]; then
  rm /tmp/gnuplot.disk* 2>/dev/null
fi
exit