[Pkg-nagios-devel] Bug#268044: marked as done (check_ntp doesn't handle all ntpq output gracefully)

Debian Bug Tracking System owner at bugs.debian.org
Tue Oct 11 14:48:39 UTC 2005

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and subject line Bug#318664: [Pkg-nagios-devel] Bug#285554: acknowledged by developer (check_smtp update)
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Date: Wed, 25 Aug 2004 20:25:16 +0200
From: Jeroen van Wolffelaar <jeroen at wolffelaar.nl>
To: Debian Bug Tracking System <submit at bugs.debian.org>
Subject: check_ntp doesn't handle all ntpq output gracefully
Message-ID: <20040825182516.GA2675 at wolffelaar.nl>
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Package: nagios-plugins
Severity: normal

mordor:/etc/nagios# ntpq -np square
     remote           refid      st t when poll reach   delay   offset  jitter
+    2 u  600 1024  377    0.344    0.523   1.230
*  PPS(0)           2 u   83 1024  377    0.810    0.482   0.043
x131.211.22.28    4 u  905 1024  377    1.284  -118.59   0.127
-    2 u   76 1024  377    0.291    1.346   0.224
+   3 u  928 1024  377    0.238    0.678   0.008
mordor:/etc/nagios# /usr/lib/nagios/plugins/check_ntp -H square
Use of uninitialized value in concatenation (.) or string at /usr/lib/nagios/plugins/check_ntp line 308.
NTP UNKNOWN: Jitter  too high

Apparantly, this beast of a regex:


fails to match, and $jitter will then continue undefined without any errorchecking.


-- System Information:
Debian Release: 3.1
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.3
Locale: LANG=nl_NL.UTF-8 at euro, LC_CTYPE=nl_NL.UTF-8 at euro

Versions of packages nagios-plugins depends on:
ii  bind9-host [host]    1:9.2.3+9.2.4-rc5-1 Version of 'host' bundled with BIN
ii  dnsutils             1:9.2.3+9.2.4-rc5-1 Clients provided with BIND
ii  fping                2.4b2-to-ipv6-8     sends ICMP ECHO_REQUEST packets to
ii  libc6                2.3.2.ds1-13        GNU C Library: Shared libraries an
ii  libldap2             2.1.30-2            OpenLDAP libraries
ii  libmysqlclient10     3.23.56-2           LGPL-licensed client library for M
ii  libnet-snmp-perl     4.0.3-1             Script SNMP connections
ii  libpq3               7.4.3-3             Shared library libpq.so.3 for Post
ii  libssl0.9.7          0.9.7d-4            SSL shared libraries
ii  netkit-ping [ping]   0.10-9              The ping utility from netkit
ii  ntp                  1:4.2.0a-11         Network Time Protocol: network uti
ii  ntp-simple           1:4.2.0a-11         Network Time Protocol: daemon for 
ii  ntpdate              1:4.2.0a-11         The ntpdate client for setting sys
ii  procps               1:3.2.1-2           The /proc file system utilities
ii  qstat                2.5c-3              Command-line tool for querying qua
ii  radiusclient1        0.3.2-6             /bin/login replacement which uses 
ii  smbclient            3.0.5-1             a LanManager-like simple client fo
ii  snmp                 5.1.1-2             NET SNMP (Simple Network Managemen

-- no debconf information

Jeroen van Wolffelaar
jeroen at wolffelaar.nl

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Date: Tue, 11 Oct 2005 10:17:44 -0400
From: sean finney <seanius at debian.org>
To: Steve Greenland <steveg at moregruel.net>,
	Jeroen van Wolffelaar <jeroen at wolffelaar.nl>,
	318664-close at bugs.debian.org, 268044-close at bugs.debian.org,
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Subject: Re: Bug#318664: [Pkg-nagios-devel] Bug#285554: acknowledged by developer (check_smtp update)
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References: <20051009212753.GH10099 at A-Eskwadraat.nl> <20051010122854.GA600 at moregruel.net> <20051009140114.GA21043 at seanius.net> <20041214014158.GA16225 at wolffelaar.nl> <handler.285554.D285554.11288665068888.notifdone at bugs.debian.org> <20051009161518.GD10099 at A-Eskwadraat.nl> <20051009204037.GA24548 at seanius.net> <20051009212753.GH10099 at A-Eskwadraat.nl> <20051011080312.GA15019 at seanius.net> <20051011134127.GB5751 at moregruel.net>
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hi steve,

On Tue, Oct 11, 2005 at 08:41:27AM -0500, Steve Greenland wrote:
> > for the latter, is using ntpdate really a problem? jeroen: you claim
> > that ntpdate is deprecated, but is it? afaik it's still quite useful
> > in many situations, including this case.
> Regarding deprecation, see http://www.eecis.udel.edu/~mills/ntp/html/ntpd=
> where the first line reads:
>     "Disclaimer: The functionality of this program is now available
>     in the ntpd program. See the -q command line option in the ntpd -
>     Network Time Protocol (NTP) daemon page. After a suitable period
>     of mourning, the ntpdate program is to be retired from this
>     distribution."

yeah, in most cases ntpd is preferable because you don't get
"thunderclap" effects on ntp servers where everyone tries to sync
at once, and it's better in general to sync in little bits here
and there rather than lots at once, etc etc.  however, there
are some cases where ntpdate can be handy, such as for laptops
or machines that are frequently powered off.

> But as I wrote in the initial bug report, the whole concept of using
> offset from the Nagios server to determine the quality of time keeping
> on the remote server is misguided. What is interesting is whether or not
> the remote server is synced with its peer(s). Ntpq gives you that info.

> But, as they say on the kernel list, -ENOPATCH, so as far as I'm
> concerned, you can close this report.

unfortunately i don't know enough about ntpq (or ntp in general) to
implement this, so i'll follow the path of least resistance and
close the bug.  if anyone now or later objects we can ropen/retitle
the bug appropriately.



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