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cat > stab_zfs.sh <<EOT
#!/bin/bash

get_duration() {
  IFS=':' read -r -a tm <<< "\$1"
  num=\${#tm[@]}
  delta=\$((\${tm[0]} * 3600))
  if [[ \$num -gt 1 ]]; then
    delta1=\$((\${tm[1]} * 60))
    (( delta += \$delta1 ))
    if [[ \$num -gt 2 ]]; then
      (( delta += \${tm[2]} ))
    fi
  fi
  echo \$delta
}

get_time_diff() {
  local cur_time=\$(date +%s)
  echo \$((\$cur_time - \$1))
}

print_time_diff() {
  local delta=\$(get_time_diff \$1)
  local sec=\$((\$delta % 60))
  let "amin = \$delta / 60"
  let "hour = \$amin / 60"
  local min=\$((\$amin%60))
  if [ -n "\$2" ]; then
    printf " Running time: %02d:%02d:%02d\\n" \$hour \$min \$sec >> \$2
  else
    printf " Running time: %02d:%02d:%02d\\n" \$hour \$min \$sec
  fi
}

log_extra() {
  echo "---------------- ZPOOL LIST ------------------" >> \$1
  zpool list >> \$1
  echo "----------------  ZFS LIST  ------------------" >> \$1
  zfs list >> \$1
  echo "----------------    PS AX   ------------------" >> \$1
  ps ax >> \$1
  echo "---------------- TOP  -n 10 ------------------" >> \$1
  top -n 10 >> \$1
}

i=1
mode=0
TOTALLOG="/var/tmp/stabzfs.\$(date +%F-%T).txt"
dsk1=\$1
shift
dsk2=\$1
shift
dsk3=\$1
shift

echo "============ ZFS Stability test started at \$(date +%F-%T) ==============" > \${TOTALLOG}
if [[ \$# < 2 ]]; then
  echo "Missing parameters in the command" | /usr/bin/tee -a \${TOTALLOG}
  exit 1
fi

case "\$1" in
  -i) mode=1
      # number of iterations is provided
      maxiter=\$2
      echo "Stability Test : launched for \$maxiter iterations at \$(date)." | /usr/bin/tee -a \${TOTALLOG}
      ;;
  -d) mode=2
      # duration of tests is provided
      delta=\$(get_duration \$2)
      echo "Stability Test : launched for \$2 interval (\$delta seconds) at \$(date)." | /usr/bin/tee -a \${TOTALLOG}
      ;;
  -t) mode=3
      # stop date/time is provided
      stopdt=\$2
      ;;
  *)  echo "Stability Test : \$1 is a wrong option" | /usr/bin/tee -a \${TOTALLOG}
      echo "Usage : stab_zfs.sh <disk1> <disk2> <disk3> (-i <iterations> | -t <HH:MM[:SS]> | -d <HH:MM[:SS] [DAY-MONTH-YEAR]>]) [-s | <test name>]"
      exit 1
      ;;
esac
shift
shift

if [[ \$mode -eq 3 ]]; then
  # stop time/date mode
  if [[ \$# > 0 ]]; then
    date -d \$1 +%s
    stopat=\$?
    if [[ \$stopat -eq 0 ]]; then
      # stop date is entered after the time
      # if it is ommited then date is treated as current one
      stopdt="\$stopdt \$1"
      shift
    fi
  fi
  echo "Stability Test : launched until \$stopdt at \$(date)." | /usr/bin/tee -a \${TOTALLOG}
  stopat=\$(date -d "\$stopdt" "+%s")
fi

GLOB_START_TIME=\$(date +%s)

while [[ \$mode -gt 0 ]]
do
  case "\$mode" in
  1) # number of iterations is provided
     if [[ \$i -gt \$maxiter ]]; then
       break
     fi
     ;;
  2) # duration of tests is provided
     difftm=\$(get_time_diff \$GLOB_START_TIME)
     if [[ \$difftm -gt \$delta ]]; then
       break
     fi
     ;;
  3) # stop date/time is provided
     tmpat=\$(date +%s)
     if [[ \$stopat -le \$tmpat ]]; then
       break
     fi
     ;;
  *) break
     ;;
  esac

  echo "----------------------- Pass \${i} : started \$(date)" | /usr/bin/tee -a \${TOTALLOG}
  START_TIME=\$(date +%s)
  ./z.sh \$dsk1 \$dsk2 \$dsk3
  print_time_diff \${START_TIME} \${TOTALLOG}
  echo "----------------------- Pass \${i} : finished \$(date)" | /usr/bin/tee -a \${TOTALLOG}
  (( i++ ))
done
echo "Tests are finished successfully at \$(date) with \${i} passes." >> \${TOTALLOG}
print_time_diff \${GLOB_START_TIME} | /usr/bin/tee -a \${TOTALLOG}
EOT
sed -i '/./!d' stab_zfs.sh && chmod 777 stab_zfs.sh