[Bug glob/30483] New: fnmatch() gives inconsistent results when using locale specific character classes

[Bug glob/30483] New: fnmatch() gives inconsistent results when using locale specific character classes

[carenas at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30483

            Bug ID: 30483
           Summary: fnmatch() gives inconsistent results when using locale
                    specific character classes
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: glob
          Assignee: unassigned at sourceware dot org
          Reporter: carenas at gmail dot com
  Target Milestone: ---

Created attachment 14903
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14903&action=edit
a test case showing the inconsistency (compare ko_KR and any other locale)

the current implementation has slightly different logic for the first
expression that matches in a character class and the remainder, leading to
situations where a match result would be inconsistent (as shown in the attached
test code).

the problem is reproducible (as coded) with glibc versions as old as 2.19 and
in multiple architectures, and indeed the issue is also present even if locale
specific character classes are not available (ex: if an invalid class name is
used as part of the pattern).

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[Bug glob/30483] fnmatch() gives inconsistent results when using locale specific or invalid character classes

[carenas at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30483

Carlo Marcelo Arenas Belón <carenas at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|fnmatch() gives             |fnmatch() gives
                   |inconsistent results when   |inconsistent results when
                   |using locale specific       |using locale specific or
                   |character classes           |invalid character classes

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