Update adding unknown matches #2390

Instead of adding a general `unknown_debian_license` rule, create a synthetic UnknownRule object and a LicenseMatch object out of the unknown license text. Also updates test expectations after reindexing licenses with new rules added from develop branch. Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>
aboutcode-org · Jun 1, 2021 · 40a303a · 40a303a
1 parent dc61705
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diff --git a/src/licensedcode/data/rules/unknown_debian_license.RULE b/src/licensedcode/data/rules/unknown_debian_license.RULE
diff --git a/src/licensedcode/data/rules/unknown_debian_license.yml b/src/licensedcode/data/rules/unknown_debian_license.yml
diff --git a/src/packagedcode/debian_copyright.py b/src/packagedcode/debian_copyright.py
@@ -11,6 +11,7 @@
 import sys
 from os import environ
 from os import path
+import traceback
 
 import attr
 
@@ -28,6 +29,13 @@
 from packagedcode.licensing import get_normalized_expression
 from packagedcode.utils import combine_expressions
 
+from licensedcode.models import Rule
+from licensedcode.models import InvalidRule
+from licensedcode.match import LicenseMatch
+from licensedcode.query import Query
+from licensedcode.spans import Span
+from licensedcode.cache import get_index
+
 from textcode.analysis import unicode_text
 
 """
@@ -38,6 +46,7 @@
 
 TRACE = environ.get("SCANCODE_DEBUG_PACKAGE", False) or False
 
+MATCHER_UNKNOWN = '5-unknown'
 
 def logger_debug(*args):
     pass
@@ -371,7 +380,7 @@ def get_license_detection(paragraph, debian_licensing):
         """
         name = paragraph.license.name
         if not name:
-            return get_license_detection_from_paragraph_text(paragraph=paragraph)
+            return get_license_detection_from_nameless_paragraph(paragraph=paragraph)
 
         normalized_expression = debian_licensing.get_normalized_expression(name)
 
@@ -585,9 +594,7 @@ def get_normalized_expression(self, exp):
 
         try:
             debian_expression = self.licensing.parse(cleaned)
-            normalized_expression = debian_expression.subs(
-                self.substitutions
-            )
+            normalized_expression = debian_expression.subs(self.substitutions)
 
         except ExpressionError:
             # If Expression fails to parse we lookup exact string matches in License paras
@@ -603,7 +610,7 @@ def get_normalized_expression(self, exp):
             else:
                 # Case where expression is not parsable and the same expression is not present in
                 # the license paragraphs
-                unknown_matches = get_unknown_matches(name=exp, text=None)
+                unknown_matches = add_unknown_matches(name=exp, text=None)
                 normalized_expression = get_license_expression_from_matches(
                     license_matches=unknown_matches
                 )
@@ -656,7 +663,7 @@ def parse_paras_with_license_text(paras_with_license):
                 if text_matches:
                     matches.extend(text_matches)
                 else:
-                    matches.extend(get_unknown_matches(name=name, text=text))
+                    matches.extend(add_unknown_matches(name=name, text=text))
 
             if license_paragraph.comment:
                 comment = license_paragraph.comment.text
@@ -775,7 +782,7 @@ def other_paragraphs(self):
         return other_paras
 
     @property
-    def duplicate_license_paragraphss(self):
+    def duplicate_license_paragraphs(self):
 
         seen_license_names = set()
         duplicate_license_paras = []
@@ -916,22 +923,101 @@ def get_license_expression_from_matches(license_matches):
     return combine_expressions(license_expressions, unique=False)
 
 
-def get_unknown_matches(name, text):
+def add_unknown_matches(name, text):
+    """
+    Return a LicenseMatch object created for an unknown license match.
+    """
+    name = name or ''
+    text = text or ''
+    license_text = f"License: {name}\n {text}".strip()
+    expression_str = 'unknown-license-reference'
+
+    idx = get_index()
+    query = Query(query_string=license_text, idx=idx)
+
+    query_run = query.query_runs[0]
+
+    match_len = len(query_run)
+    match_start = query_run.start
+    matched_tokens = query_run.tokens
+
+    qspan = Span(range(match_start, query_run.end + 1))
+    ispan = Span(range(0, match_len))
+    len_legalese = idx.len_legalese
+    hispan = Span(p for p, t in enumerate(matched_tokens) if t < len_legalese)
+
+    rule = UnknownRule(
+        license_expression=expression_str,
+        stored_text=license_text,
+        length=match_len)
+
+    match = LicenseMatch(
+        rule=rule, qspan=qspan, ispan=ispan, hispan=hispan,
+        query_run_start=match_start,
+        matcher=MATCHER_UNKNOWN, query=query_run.query
+    )
+
+    return [match]
+
+@attr.s(slots=True, repr=False)
+class UnknownRule(Rule):
+    """
+    A specialized rule object that is used for the special case of unknown matches in
+    debian copyright files.
+
+    Since there can be a lot of unknown licenses in a debian copyright file,
+    the rule and the LicenseMatch objects for those are built at matching time.
+    """
+
+    def __attrs_post_init__(self, *args, **kwargs):
+        self.identifier = 'debian-unknown-' + self.license_expression
+        expression = None
+        try:
+            expression = self.licensing.parse(self.license_expression)
+        except:
+            raise InvalidRule(
+                'Unable to parse License rule expression: ' +
+                repr(self.license_expression) + ' for: SPDX rule:' +
+                self.stored_text +
+                '\n' + traceback.format_exc())
+        if expression is None:
+            raise InvalidRule(
+                'Unable to parse License rule expression: '
+                +repr(self.license_expression) + ' for:' + repr(self.data_file))
+
+        self.license_expression = expression.render()
+        self.license_expression_object = expression
+        self.is_license_tag = True
+        self.is_small = False
+        self.relevance = 100
+        self.has_stored_relevance = True
+
+    def load(self):
+        raise NotImplementedError
+
+    def dump(self):
+        raise NotImplementedError
+
+def build_unknown_symbol(licenses_db=None):
     """
-    Return a LicenseMatch object for an unknown license match.
+    Return the unknown SPDX license symbol given a `licenses_db` mapping of
+    {key: License} or the standard license db.
     """
-    license_text = f"License: {name} {text}"
-    return get_license_matches(query_string=license_text)
+    from license_expression import LicenseSymbolLike
+    from licensedcode.models import load_licenses
+    licenses_db = licenses_db or load_licenses()
+    return LicenseSymbolLike(licenses_db['unknown'])
 
 
-def get_license_detection_from_paragraph_text(paragraph):
+def get_license_detection_from_nameless_paragraph(paragraph):
     """
-    Return a LicenseDetection object built from a paragraph license text.
+    Return a LicenseDetection object built from any paragraph without a license name.
     """
+    assert not paragraph.license.name
     matches = get_license_matches(paragraph.license.text)
 
     if not matches:
-        unknown_matches = get_unknown_matches(name=None, text=paragraph.license.text)
+        unknown_matches = add_unknown_matches(name=None, text=paragraph.license.text)
         normalized_expression = get_license_expression_from_matches(
             license_matches=unknown_matches
         )

diff --git a/tests/packagedcode/data/debian/basic-rootfs-with-licenses-expected.json b/tests/packagedcode/data/debian/basic-rootfs-with-licenses-expected.json
@@ -34,8 +34,8 @@
     "code_view_url": null,
     "vcs_url": null,
     "copyright": "Copyright (c) 1998-2016 Free Software Foundation, Inc.\nCopyright (c) 2001 by Pradeep Padala\nCopyright (c) 1994 X Consortium\nCopyright (c) 1980, 1991, 1992, 1993 The Regents of the University of California\nCopyright 1996-2007 by Thomas E. Dickey",
-    "license_expression": "bsd-new AND mit AND unknown AND x11-fsf AND x11-xconsortium",
-    "declared_license": "",
+    "license_expression": "x11-fsf AND x11-xconsortium AND bsd-new",
+    "declared_license": null,
     "notice_text": null,
     "root_path": null,
     "dependencies": [],
@@ -117,9 +117,9 @@
     "bug_tracking_url": null,
     "code_view_url": null,
     "vcs_url": null,
-    "copyright": "Copyright 2013 Jiri Pirko <jiri@resnulli.us>\nCopyright 2014 Andrew Ayer <agwa@andrewayer.name>",
-    "license_expression": "lgpl-2.1 AND lgpl-2.1-plus AND unknown",
-    "declared_license": "LGPL-2.1+",
+    "copyright": "Copyright 2013 Jiri Pirko <jiri@resnulli.us>",
+    "license_expression": "lgpl-2.1-plus AND lgpl-2.1-plus AND lgpl-2.1 AND lgpl-2.1",
+    "declared_license": ["LGPL-2.1+"],
     "notice_text": null,
     "root_path": null,
     "dependencies": [],

diff --git a/...debian/copyright/debian-2019-11-15/main/a/asterisk/stable_copyright-detailed.expected.yml b/...debian/copyright/debian-2019-11-15/main/a/asterisk/stable_copyright-detailed.expected.yml
@@ -51,35 +51,27 @@
   - WOL
   - FSFUL
 - (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference)
-  AND fsf-free AND autoconf-simple-exception-2.0 AND mit-old-style-no-advert AND gpl-2.0 AND
-  gpl-2.0 AND none AND bsd-original-uc AND gpl-2.0 AND tu-berlin AND bsd-new AND bsd-new AND
-  bsd-original AND gpl-2.0-plus AND public-domain AND none AND gpl-2.0 AND public-domain AND
-  other-permissive AND (mit AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference
-  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference
-  AND unknown-license-reference)) AND gpl-2.0-plus AND free-unknown AND (bsd-original-uc AND
-  isc AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0
-  AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference))
-  AND bsd-original-uc AND bison-exception-2.2 AND bsd-new AND gpl-2.0 AND (wol AND (gpl-2.0
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference))
-  AND (lgpl-2.1 OR (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND
-  gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference))
-  AND public-domain AND isc AND brian-clapper AND lgpl-2.1 AND mit-0 AND (gpl-2.0 AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference
   AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference
-  AND unknown-license-reference AND unknown-license-reference) AND gpl-2.0
+  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference) AND fsf-free AND autoconf-simple-exception-2.0
+  AND mit-old-style-no-advert AND gpl-2.0 AND gpl-2.0 AND none AND bsd-original-uc AND gpl-2.0
+  AND tu-berlin AND bsd-new AND bsd-new AND bsd-original AND gpl-2.0-plus AND public-domain
+  AND none AND gpl-2.0 AND public-domain AND other-permissive AND (mit AND (gpl-2.0 AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND unknown-license-reference)) AND gpl-2.0-plus AND unknown-license-reference AND (bsd-original-uc
+  AND isc AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0
+  AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference)) AND bsd-original-uc
+  AND bison-exception-2.2 AND bsd-new AND gpl-2.0 AND (wol AND (gpl-2.0 AND gpl-1.0-plus AND
+  gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND unknown-license-reference)) AND (lgpl-2.1 OR (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND
+  gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND unknown-license-reference)) AND public-domain AND isc AND brian-clapper AND lgpl-2.1 AND
+  mit-0 AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0
+  AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference) AND gpl-2.0
 - |
   1999-2006, Brett Bryant <bbryant@digium.com>
   1999-2006, Mark Spencer <markster@digium.com>

diff --git a/...ode/data/debian/copyright/debian-2019-11-15/main/a/asterisk/stable_copyright.expected.yml b/...ode/data/debian/copyright/debian-2019-11-15/main/a/asterisk/stable_copyright.expected.yml
@@ -26,30 +26,23 @@
   - Expat
   - WOL
 - (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference)
-  AND fsf-free AND autoconf-simple-exception-2.0 AND mit-old-style-no-advert AND gpl-2.0 AND
-  none AND bsd-original-uc AND tu-berlin AND bsd-new AND bsd-new AND bsd-original AND gpl-2.0-plus
-  AND public-domain AND other-permissive AND (mit AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND
-  unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference
-  AND unknown-license-reference AND unknown-license-reference)) AND free-unknown AND (bsd-original-uc
-  AND isc AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0
-  AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus
-  AND gpl-1.0-plus AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference))
+  AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference) AND fsf-free AND autoconf-simple-exception-2.0
+  AND mit-old-style-no-advert AND gpl-2.0 AND none AND bsd-original-uc AND tu-berlin AND bsd-new
+  AND bsd-new AND bsd-original AND gpl-2.0-plus AND public-domain AND other-permissive AND (mit
+  AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND
+  gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference)) AND unknown-license-reference
+  AND (bsd-original-uc AND isc AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND
+  gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference))
   AND bison-exception-2.2 AND bsd-new AND (wol AND (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus
   AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND
-  unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference
-  AND unknown-license-reference AND unknown-license-reference)) AND (lgpl-2.1 OR (gpl-2.0 AND
-  gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND
-  unknown-license-reference AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND gpl-1.0-plus AND gpl-1.0-plus AND unknown-license-reference AND gpl-1.0-plus AND gpl-1.0-plus
-  AND unknown-license-reference AND unknown-license-reference AND unknown-license-reference))
-  AND isc AND brian-clapper AND lgpl-2.1 AND mit-0
+  gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND unknown-license-reference)) AND (lgpl-2.1 OR (gpl-2.0 AND gpl-1.0-plus AND gpl-1.0-plus
+  AND gpl-1.0-plus AND gpl-2.0 AND gpl-2.0 AND gpl-1.0-plus AND unknown-license-reference AND
+  gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus AND gpl-1.0-plus
+  AND unknown-license-reference)) AND isc AND brian-clapper AND lgpl-2.1 AND mit-0
 - |
   1999-2006, Brett Bryant <bbryant@digium.com>
   1999-2006, Mark Spencer <markster@digium.com>

diff --git a/...a/debian/copyright/debian-2019-11-15/main/c/clamav/stable_copyright-detailed.expected.yml b/...a/debian/copyright/debian-2019-11-15/main/c/clamav/stable_copyright-detailed.expected.yml
@@ -51,9 +51,8 @@
   AND zlib AND zlib AND isc AND fsf-unlimited AND fsf-free AND fsf-unlimited-no-warranty AND
   fsf-ap AND fsf-ap AND bzip2-libbzip-2010 AND (public-domain AND public-domain) AND public-domain
   AND public-domain AND x11-tiff AND (public-domain AND public-domain) AND (apache-2.0 AND gpl-1.0-plus
-  AND apache-2.0 AND apache-2.0 AND unknown-license-reference AND gpl-1.0-plus AND apache-2.0
-  AND apache-2.0) AND (gpl-3.0-plus AND bison-exception-2.2 AND gpl-1.0-plus AND other-copyleft
-  AND gpl-3.0 AND gpl-3.0)
+  AND apache-2.0 AND apache-2.0 AND gpl-1.0-plus AND apache-2.0 AND apache-2.0) AND (gpl-3.0-plus
+  AND bison-exception-2.2 AND gpl-1.0-plus AND other-copyleft AND gpl-3.0 AND gpl-3.0)
 - |
   1998-2015, Sourcefire, Inc.
   2002-2007, Tomasz Kojm <tkojm@clamav.net>

diff --git a/...dcode/data/debian/copyright/debian-2019-11-15/main/c/clamav/stable_copyright.expected.yml b/...dcode/data/debian/copyright/debian-2019-11-15/main/c/clamav/stable_copyright.expected.yml
@@ -38,9 +38,8 @@
   AND bsd-new AND zlib AND isc AND fsf-unlimited AND fsf-free AND fsf-unlimited-no-warranty
   AND fsf-ap AND fsf-ap AND bzip2-libbzip-2010 AND (public-domain AND public-domain) AND public-domain
   AND public-domain AND x11-tiff AND (public-domain AND public-domain) AND (apache-2.0 AND gpl-1.0-plus
-  AND apache-2.0 AND apache-2.0 AND unknown-license-reference AND gpl-1.0-plus AND apache-2.0
-  AND apache-2.0) AND (gpl-3.0-plus AND bison-exception-2.2 AND gpl-1.0-plus AND other-copyleft
-  AND gpl-3.0 AND gpl-3.0)
+  AND apache-2.0 AND apache-2.0 AND gpl-1.0-plus AND apache-2.0 AND apache-2.0) AND (gpl-3.0-plus
+  AND bison-exception-2.2 AND gpl-1.0-plus AND other-copyleft AND gpl-3.0 AND gpl-3.0)
 - |
   1998-2015, Sourcefire, Inc.
   2002-2007, Tomasz Kojm <tkojm@clamav.net>