#!/bin/sh
FIFO=/var/tmp/logpipe
PID=/run/receive-log
LOG=/var/log/pipe.log

if [ -n "$1" ]
then
  LOG=$1
fi

echo $$ > ${PID}
test -p ${FIFO} || mkfifo ${FIFO}

trap receive_SIGHUP 1
trap receive_SIGTERM 15

# --- Functions
receive_SIGHUP () {
  daytime=`date '+%Y-%m-%dT%H:%M:%S%z'`
  echo "Received SIGHUP" 1>&2
  sleep 10
}

receive_SIGTERM() {
  daytime=`date '+%Y-%m-%dT%H:%M:%S%z'`
  echo "Received SIGTERM" 1>&2
  rm ${PID}
  exit 0
}

# --- Main
while true
do
  if [ -p ${FIFO} ]
  then
    read line <${FIFO}
    test -n "${line}" && echo ${line} >> ${LOG}
  else
    sleep 1
  fi
done 2>/dev/null