Multiple Pipes

#!/bin/bash

PROGNAME=$(basename $(readlink -f $0))
LOG="$PROGNAME.log"
PIPE_LOG="$PROGNAME-$$-log"
PIPE_ECHO="$PROGNAME-$$-echo"

# program output to log file and optionally echo to screen (if $1 is "-e")
log () {
  if [ "$1" = '-e' ]; then
    shift
    $@ > $PIPE_ECHO 2>&1
  else
    $@ > $PIPE_LOG 2>&1
  fi
}

# create named pipes if not exist
if [[ ! -p $PIPE_LOG ]]; then
  mkfifo -m 600 $PIPE_LOG
fi
if [[ ! -p $PIPE_ECHO ]]; then
  mkfifo -m 600 $PIPE_ECHO
fi

# cat pipe data to log file
while read data; do
  echo -e "$PROGNAME: $data" >> $LOG
done < $PIPE_LOG &

# cat pipe data to log file & echo output to screen
while read data; do
  echo -e "$PROGNAME: $data"
  log echo $data   # this doesn't work
  echo -e $data > $PIPE_LOG 2>&1   # and neither does this
  echo -e "$PROGNAME: $data" >> $LOG   # so I have to do this
done < $PIPE_ECHO &

# clean up temp files & pipes
clean_up () {
  # remove named pipes
  rm -f $PIPE_LOG
  rm -f $PIPE_ECHO
}
#execute "clean_up" on exit
trap "clean_up" EXIT

log echo "Log File Only"
log -e echo "Echo & Log File"