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28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
14 Mar 12 - - International Informix User Group set to meet in San Diego... Read
1 Mar 12 - IBM Data Management - IIUG Heads West for 2012 - Get ready for sun and sand in San Diego... Read
1 Mar 12 - IBM Data Management - Running Informix on Solid-State Drives.Speed Up Database Access... Read
26 Feb 12 - - Better results, lower cost for a broad set of new IBM clients and partners... Read
24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
6 Feb 12 - PRLOG - Informix port delivers unlimited database scalability for popular SaaS application ... Read
2 Feb 12 - developerWorks - Loading data with the IBM Informix TimeSeries Plug-in for Data Studio... Read
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13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
9 Jan 12 - - DNS impact on Informix / Impacto do DNS no Informix... Read
8 Sep 11 - - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
1 Aug 11 - IBM Data Management Magazine - IIUG user view: Happy 10th anniversary to IBM and Informix... Read
8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
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11 Mar 11 - InvestorPlace - It's Time to Give IBM Props: How many tech stocks are up 53% since the dot-com boom?... Read
9 Mar 11 - DBTA - Database Administration and the Goal of Diminishing Downtime... Read
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25 Jan 11 - PR Newswire - Bank of China in the UK Works With IBM to Become a Smarter, Greener Bank... Read
12 Oct 10 - Database Trends and Applications - Informix 11.7: The Beginning of the Next Decade of IBM Informix... Read
20 Sep 10 - - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
20 Jul 10 - IBM Announcements - IBM Informix Choice Edition V11.50 helps deploy low-cost scalable and reliable solutions for Apple Macintosh and Microsoft Windows... Read
20 Jul 10 - IBM Announcements - Software withdrawal: Elite Support for Informix Ultimate-C Edition... Read
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10 February 2010 - The Wall Street Journal - International Business Machines is expanding an initiative to win over students and professors on its products. How do they lure the college crowd?... Read

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IDS Forum

Re: How to Check the Security of $INFORMIXDIR and

Posted By: Jim Tranny
Date: Tuesday, 12 August 2008, at 10:03 a.m.

In Response To: How to Check the Security of $INFORMIXDIR and Chun (Jonathan Leffler)

On Sat, Jul 26, 2008 at 12:32 AM, Jonathan Leffler
<> wrote:
> Some, maybe even many, of you have heard me say "Make sure that
> $INFORMIXDIR and all the directories in the path leading to it are
> secure" and "Make sure that the paths leading to your chunks are
> secure", but how many people are really sure they know when something
> is secure and when it is not really secure?
> OK - there was at least one hand moving out there near the back of the
> audience - just a little.
> I've uploaded a program to the IIUG Software Archive (hint, hint - O
> Keepers of the IIUG Software Archive - and it is the second version,
> 2.34, that should be made public, please) called linkpath which is my
> current tool for assessing whether a path leading to a file (or a
> directory) is really secure. It should compile on just about any
> version of Unix or Linux you can lay hands on; I've compiled it on
> HP-UX, Solaris 10, Linux, AIX, and MacOS X.
> Usage: linkpath [-adhsvV][-u user][-g group] file [...]
> -a Process absolute names
> -d Print diagnostic output
> -g group Treat user as trusted
> -h Print this help message and exit
> -s Security check directories
> -u user Treat user as trusted
> -v Verbose mode
> -V Print version and exit
> The program chases down insecure directories - defined as a directory
> that is publicly writable, or a directory that is owned by a
> non-trusted group that is group writable, or a directory that is owned
> by a non-trusted user. It reports on insecure files too. It follows
> symlinks, but analyses the path that the symlink traverses to make
> sure there are no insecure directories on the way. The trusted users
> are root, bin, sys and informix; the trusted groups are bin, sys,
> informix, and group 0 (sometimes root, sometimes wheel (MacOS X),
> sometimes system (AIX)), and the group that owns the root directory
> (admin, 80, on MacOS X; group 0 on other systems).
> I am interested to know (a) if you have any problems compiling it
> (platform - o/s and compiler - would be relevant), and (b) whether any
> of your INFORMIXDIRs are insecure. One way of checking that is:
> linkpath -sv `cat /INFORMIXTMP/.infxdirs`
> Or - Korn Shell or Bash:
> linkpath -sv $(</INFORMIXTMP/.infxdirs)
> One reason for asking is to find out how much trouble would be caused
> if a security check based on this code was added to fix packs of IDS,
> with ON-Init in particular not starting unless $INFORMIXDIR was secure
> according to the criteria checked by this code.
> [And one reason for asking is because I've been saddened to find that
> most of the R&D and QA machines do not pass this security test.
> Granted, security isn't a major problem inside IBM's firewalls - but I
> was a little surprised at the extent of the problems I have to work
> around.
> My machine passes muster (funny that!) except for one INFORMIXDIR,
> which is the result of a build without a formal install. If the
> 'uninstalled build' was the only reason the R&D and QA machines
> failed, I'd be happier; sadly, it isn't.]
> --
> Jonathan Leffler #include <disclaimer.h>
> Email:,
> Guardian of DBD::Informix v2008.0513 --
> "Blessed are we who can laugh at ourselves, for we shall never cease
> to be amused."
> NB: Please do not use this email for correspondence.
> I don't necessarily read it every week, even.
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.

I'm not sure if you prefer to keep this off the list...

On my CentOS release 5.2 system I get an error saying 'invalid user
'sys''. Here's the output from linkpath -sdv `cat
root directory: st_dev - 64768, st_ino = 2, st_gid = 0
grp bin => gid 1
grp sys => gid 3
grp informix => gid 344
usr root => uid 0
usr bin => uid 1
usr sys => unknown!
linkpath: invalid user 'sys'

FYI, I have a group called 'sys' but not user called 'sys' on all my
Linux systems:
Red Hat Enterprise Linux ES release 4 (Nahant Update 6)
CentOS release 5.2


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