IZ3268: On Ubuntu 10.04 LTS libc version detection fails

[gvacanti]

[Imported from gridengine issuezilla ​http://gridengine.sunsource.net/issues/show_bug.cgi?id=3268]

        Issue #:      3268             Platform:     Other    Reporter: gvacanti (gvacanti)
       Component:     gridengine          OS:        Linux
     Subcomponent:    execution        Version:      6.2u3       CC:    None defined
        Status:       NEW              Priority:     P3
      Resolution:                     Issue type:    DEFECT
                                   Target milestone: ---
      Assigned to:    pollinger (pollinger)
      QA Contact:     pollinger
          URL:
       * Summary:     On Ubuntu 10.04 LTS libc version detection fails
   Status whiteboard:
      Attachments:

     Issue 3268 blocks:
   Votes for issue 3268:


   Opened: Tue May 18 01:53:00 -0700 2010 
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On Ubuntu 10.04 LTS libc version detection fails in util/arch. The reason is that now (around line 244) strings libc.so.6 returns

GNU C Library (Ubuntu EGLIBC 2.11.1-0ubuntu7) stable release version 2.11.1, by Roland McGrath et al.

where the version number appears twice. The subsequent tests get a string like "11\n11" instead of just "11" and the shell complains that
the syntax of the if conditions is wrong.

I fixed it by adding uniq to this line

libc_version=`echo $libc_string | tr ' ,' '\n' | grep "2\." | cut -f 2 -d "." | uniq`

   ------- Additional comments from olesen Tue May 18 02:09:36 -0700 2010 -------
These problems with parsing the libc output recur with some frequency.
If the Solaris sed can handle the following type of expression, I think we should use it.
It saves a number problems and several process forks:

/lib/libc.so.6 | sed -ne '1s/^GNU C Library.*version *2\.\([0-9][0-9]*\).*$/\1/p'

[dlove]

Fixed by [3580/sge].