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cverules(1)			cverules Manual			   cverules(1)

       cverules	 - Generate version matching rules for installed software on a
       Linux / Unix distribution

       cverules	-r

       The cverules script will	scan the installed  distribution  packages  on
       your  system and	attempt	to generate version matching rules that	can be
       used by cvechecker.

       The script should be used by people interested in contributing  to  the
       cvechecker' success.

       The  command  requires a	single option, -r. An example usage pattern is
       like so:

       ~$ cverules -r >	output.txt

       The generated output.txt	file can then be submitted to  the  cvechecker
       project,	allowing it to improve the versions.dat.

       The user	should understand that this script attempts to generate	match-
       es, but doesn't guarantee that each and every installed software	is de-

       First  of  all,	if a package is	already	matched	by existing rules, the
       rest of the package' content isn't scanned anymore. This	is because the
       tool  wants  to	identify software and versions - once one has been de-
       tected, further detection is less useful	and very resource consuming.

       Second, if a package isn't detected properly, the script	 will  see  if
       the  version  based on the distributions' package version can be	found.
       If it can't, then it cannot identify the	version	properly  and  ignores
       the package.

       Third,  if the script does find a match for the version,	it tries out a
       few regular expressions (which have a high probability  rate  to	 match
       the  version)  but has no intelligence to optimize the expressions.  If
       the tried expressions fail, the script will ignore the package.

       cverules	is part	of the cvechecker tool.	cverules was written  by  Sven
       Vermeulen <>.

November 25, 2010		1 December 2010			   cverules(1)


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