This file is indexed.

/usr/share/check_mk/checks/systemtime is in check-mk-server 1.1.12-1ubuntu1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2010             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# ails.  You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

systemtime_default_values = (30, 60) # warn/crit sec. offset

def inventory_systemtime(info):
    if len(info) >= 1:
        return [(None, "systemtime_default_values")]

def check_systemtime(item, params, info):
    if len(info) == 0:
        return (3, "UNKNOWN - no information sent by agent")

    systemtime = int(info[0][0])
    ourtime = time.time()
    offset = systemtime - ourtime
    warn, crit = params
    infotext = "Offset is %+.1f sec (levels at %d/%d sec)" % (offset, warn, crit)
    perfdata = [ ("offset", offset, warn, crit, 0) ]

    if abs(offset) >= crit:
        return (2, "CRIT - " + infotext, perfdata)
    elif abs(offset) >= warn:
        return (1, "WARN - " + infotext, perfdata)
    else:
        return (0, "OK - " + infotext, perfdata)

check_info["systemtime"] = ( check_systemtime, "System Time", 1, inventory_systemtime )