# Copyright (c) 2010 Flowerfire, Inc.  All Rights Reserved.
unix_syslog = {

  plugin_version = "1.2"

  # 2006-05-11 : 1.1 : ... : added saving and restoring of last processed line.
  # 2009-04-24 : 1.2 : gas : removed create_profile_wizard_options, v8 now handles this all
 
  # The name of the log format
  log.format.format_label = "Unix Syslog"
  log.miscellaneous.log_data_type = "syslog"  
  log.miscellaneous.log_format_type = "syslog_server"

  # The log is in this format if any of the first ten lines match this regular expression
  log.format.autodetect_regular_expression = "^ *<*[0-9X]*>*[A-Za-z][A-Za-z][A-Za-z] [0-9 ]?[0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]\\.*[0-9]* [^ ]* "

  # All log field parsing will be done using the parsing filters
  log.format.parse_only_with_filters = "true"

  # The format of dates and times in this log
  log.format.date_format = "auto"
  log.format.time_format = "auto"

  # Log fields
  log.fields = {

    date = ""
    time = ""
    logging_device = ""
    log_level = ""
    syslog_message = ""

  } # log.fields


  # At initialization time, get the last line from the previous build, in case we need it for "repeated" lines
  log.filter_initialization_syslog = `
string last_log_line_pathname = volatile.database_directory . "main" . internal.directory_divider . "last_log_line.txt";
string last_log_line;
if (file_exists(last_log_line_pathname)) then (
  last_log_line = read_file(last_log_line_pathname);
);
`

  # At finialization time, save the last line of this build
  log.filter_finalization_syslog = `
write_file(last_log_line_pathname, last_log_line);
`

  # Log Parsing Filters
  log.parsing_filters = {

    year_from_filename = {
      label = ""
      comment = ""
      value = "
if (matches_regular_expression(current_log_pathname(), '((20|19)[0-9][0-9])\\\\.log')) then
  log.processing.default_log_date_year = $1;
"
      disabled = false
    } # year_from_filename

    # Parse out the syslog fields
    syslog_1 = {
      label = "syslog_1"
      comment = ""
      value = `
v.syslog_message = '';
if (matches_regular_expression(current_log_line(), '^ *<*([0-9X]*)>*([A-Za-z][A-Za-z][A-Za-z] [0-9 ]?[0-9]) ([0-9][0-9]:[0-9][0-9]:[0-9][0-9])(.*)')) then (
  set_collected_field('', 'log_level', $1);
  set_collected_field('', 'date', normalize_date($2, 'mmm dd'));
  set_collected_field('', 'time', $3);
  v.syslog_message = $4;

  # Look for a hostname
  if (matches_regular_expression(v.syslog_message, '^ ([^[ ]+) (.*)$')) then (
    set_collected_field('', 'logging_device', $1);
    v.syslog_message = $2;
  );

  # If there's no hostname, look for an IPv6 address
  else if (matches_regular_expression(v.syslog_message, '^ \\\\[([0-9]+\\\\.[0-9]+\\\\.[0-9]+\\\\.[0-9]+\\\\.[0-9]+\\\\.[0-9]+)\\\\]  (.*)$')) then (
    set_collected_field('', 'logging_device', $1);
    v.syslog_message = $2;
  );

  # If this is a 'last message repeated' line, take the previous line and insert it into the log data stream that many times.
  if (matches_regular_expression(v.syslog_message, '^last message repeated ([0-9]+) times')) then (
    for (int i = 0; i < $1; i++) (
      set_subnode_value('volatile.log_line_insertions', i, last_log_line);
    )
  ); # if last message repeated

  # If it's a normal line, extract it normally
  else (

    while (starts_with(v.syslog_message, ' '))
      v.syslog_message = substr(v.syslog_message, 1);
    while (matches_regular_expression(v.syslog_message, '^(.*)(\\\\^M| )$'))
      v.syslog_message = $1;

    if (matches_regular_expression(current_log_pathname(), '([0-1][0-9]-[0-3][0-9]-[21][09][0-9][0-9])')) then
      set_collected_field('', 'date', $1);

    # Remember the log line, in case we get a "last message repeated" line next
    last_log_line = current_log_line();

  ); # if non-repeated line

); # it matches normal layout
`
    } # syslog_1

  } # log.parsing_filters

  # Database fields
  database.fields = {

    date_time = ""
    day_of_week = ""
    hour_of_day = ""
    logging_device = ""

  } # database.fields
} # unix_syslog