Shell Programming and Scripting

  Function_A() {
                local ID=$1
               local SUB=$2

               if [ $CURRENT_COUNT -lt $MAX_COUNT ]
               then
                        nohup ChildProcess $ID $SUB > "$LOG" 2>&1 &

                       let CURRENT_COUNT++
                       RC=0
else
echo "Cannot start another process right now"
                           RC=1
fi

               return $RC
} # End Function_A
   
  ##########################
  # Main
   
  #
  # some unrelated detail here...
  #
   
  cd $DIR
   
  WaitingForChildrenToFinish=1
   
  while [ $WaitingForChildrenToFinish -eq 1 ]
  do
            # Process each file
for FILE in `ls -tr ${MGR_ID}_*.msg 2>/dev/null`
           do
echo -e "\nProcessing file: \"$FILE\""

                   Function_A $MGR_ID $SUBJECT
                   RC=$?

                   if [ $RC -ne 0 ]
                   then
              RETRY="$DIR/${MGR_ID}_${RETRY}_${SUBJECT}.msg"
cp -p $FILE $RETRY
fi

                   # Finished processing this file so move it out
mv $FILE $PROCESSED_DIR

                   #
                   # some unrelated detail here...
                   #

                   # End condition
                   if [ $CO_END_FLAG -eq 1 ]
                   then
                                WaitingForChildrenToFinish=0
                               break
fi
done # End for each file 

           if [ $WaitingForChildrenToFinish -eq 1 ]
           then
                    echo "No files to process so sleep..."
                   sleep 5
fi
done # End WaitingForChildrenToFinish
   
   
  Sample output looks like this:
   
  ….
   
  Processing file: "00wm4793_AAA_111.msg"
  Cannot start another process right now
   
  Processing file: "00wm4793_AAA_112.msg"
  cp: cannot stat `00wm4793_AAA_111.msg': No such file or directory
  Cannot start another process right now
   
  …

RETRY="$DIR/${MGR_ID}_${RETRY}_${SUBJECT}.msg"
cp -p $FILE $RETRY

RETRY="$DIR/${MGR_ID}_${RETRY_WAIT}_${SUBJECT}.msg"
cp -p $FILE $RETRY