thread.sh

#!/bin/bash
#usage ./thread threadId limit

TMP_OS=$(uname | tr "[:upper:]" "[:lower:]")
if [[ "{$TMP_OS}" = *darwin* ]]; then
    LOCK='lockfile ../lock.lock'
    UNLOCK='rm -f ../lock.lock'
elif [[ "{$TMP_OS}" = *linux* ]]; then
    LOCK='lockfile-create ../lock'
    UNLOCK='lockfile-remove ../lock'
fi

ID=$1
if [[ "$2" = /* ]]
then
   : # Absolute path
   EXEC=$2
else
   : # Relative path
   EXEC=$(pwd)/$2
fi

if [[ "$3" = /* ]]
then
   : # Absolute path
   DATA_FILE=$3
else
   : # Relative path
   DATA_FILE=$(pwd)/$3
fi
LIMIT=$(awk 'END{print NR}' "$DATA_FILE")
COUNTER='../syncedCount.txt'
mkdir "$1"
for arg in "${@:4}" ; do
	cp -rf "$arg" "$1"
done
cd "$1" || exit

while :
do
  $LOCK
  index=$(cat $COUNTER)
  echo "Thread $1 says: old index value: ""$index"
  index=$((index+1))
  echo "Thread $ID says: new index value: ""$index"
  echo "$index" > "$COUNTER"
  $UNLOCK
  if [ "$index" -le "$LIMIT" ]; then
	WORK_LOAD=$(sed -n "$index"p < "$DATA_FILE")
	echo "Thread $ID says: working on " "$WORK_LOAD"
        echo ""
	sh "$EXEC" "$WORK_LOAD" > "../standardOutput/$WORK_LOAD.txt" 2>&1
  else
	echo "Thread $ID done, no more work"
	echo ""
	cd ..
	rm -rf "$1"
	exit
  fi
done