#!/bin/bash

PID=$1
PARTIAL=$2
PGXLOG=$3

function copy_last_wal
{
   FILE=$( ls -t1p $PGXLOG | grep -v / | head -1 )

   echo "Last Wal> " $FILE

   cp ${PGXLOG}/${FILE} ${PARTIAL}/${FILE}.tmp
   mv ${PARTIAL}/${FILE}.tmp ${PARTIAL}/${FILE}.partial
   find ${PARTIAL} -name *.partial | grep -v ${FILE} | xargs -i rm -fr {}
}


while [ 1 ]
do 
   ps --pid $PID > /dev/null 2>&1
   ALIVE=$?
   
   if [ "${ALIVE}" == "1" ]
   then
       #The process is dead
       echo "Process dead"
       copy_last_wal 
       exit 1
   fi

   #The process still exist
   touch ${PARTIAL}/alive
   copy_last_wal 

   sleep 10
done