#!/bin/bash

# This daemon (endless loop) constructs user-readable scheduler
# logs once per minute.  It runs with a 3-minute latency.

# To run this script as part of the standard BOINC backend
# components, just include:
#    <daemon>
#      <cmd> makelog.sh </cmd>
#    </daemon>
# in your config.xml file

export lastmin=dontmatch

while [ true ] ; do

# we extract the logs from 3 minutes ago, because the cgi
# process can run for a couple of minutes.
  export currmin=`date --date="-3 minute" '+%Y-%m-%d %H:%M'`

# create correct filename, directory name, path, etc.
  export oneword=`echo $currmin | sed 's/ /_/'`
  export filename=${oneword}.txt
  export dirname=`echo $filename | cut -b 1-13`
  export dirpath=../html/user/sched_logs/${dirname}
  if [ ! -d $dirpath ] ; then
    mkdir $dirpath
  fi
  export filepath=${dirpath}/${filename}

# if the minute has changed, or the one-minute log file does not exist,
# then create it.  One must consider both cases otherwise log rotation
# can screw things up.
  if [ "${currmin}" != "${lastmin}" -o ! -f "${filepath}" ] ; then

# put some text into the start of the 'human readable' log file
    echo "Note that all times in this file are in UTC.  To compare with your BOINC logs"           > $filepath
    echo "you will need to convert your local time into UTC.  To make comparison easier you"      >> $filepath
    echo "may also want to consider using a high-precision time protocol such as NTP to set your" >> $filepath
    echo "computers clock.  This will allow comparisons of the time stamps to fractions of"       >> $filepath
    echo "a second."                                                                              >> $filepath
    echo " "                                                                                      >> $filepath
    echo "These files are posted approximately three minutes after the events are logged."        >> $filepath
    echo " "                                                                                      >> $filepath
    echo " "                                                                                      >> $filepath

# now grep for all log entries from 3 minutes ago.  Use sed to hide any sensitive info
# such as authenticator and IP address.  Must
    grep --no-filename "${currmin}" ../log_*/cgi.log ../log_*/cgi.log.0 | \
    sed 's/authenticator .*//g; s/\[auth [^]]*\]//g; s/from [0-9.]*//g; s/auth [0-9a-f]*\,//g; s/\[IP [0-9.]*\]//g; s/\[USER#[0-9]*\]//g; s/IP [0-9.]*\,//g' >> $filepath 
    export lastmin=$currmin
  else

# if the minute has not changed and log file exists, sleep a bit and
# try again
    sleep 15;
  fi
done

# this is an infinite loop, so we should never get here!!