Author: pfg
Date: Tue Aug 15 00:54:16 2017
New Revision: 322524
URL: https://svnweb.freebsd.org/changeset/base/322524

Log:
  MFC r322368, r322371:
  fnmatch(3): improve POSIX conformance.
  
  In a recent interpretation[1], "\\" shall return a non-zero value
  (indicating either no match or an error).
  
  The fix involves a change over r254091 and now the behavior matches the
  Sun/IBM/HP closed source implementations and also likely musl libc.
  
  Submitted by: Joerg Schilling <joerg at schily.net>
  
  [1] http://austingroupbugs.net/view.php?id=806

Modified:
  stable/11/lib/libc/gen/fnmatch.c
  stable/11/lib/libc/tests/gen/fnmatch_testcases.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/lib/libc/gen/fnmatch.c
==============================================================================
--- stable/11/lib/libc/gen/fnmatch.c    Mon Aug 14 23:46:10 2017        
(r322523)
+++ stable/11/lib/libc/gen/fnmatch.c    Tue Aug 15 00:54:16 2017        
(r322524)
@@ -184,7 +184,8 @@ fnmatch1(const char *pattern, const char *string, cons
                        if (!(flags & FNM_NOESCAPE)) {
                                pclen = mbrtowc(&pc, pattern, MB_LEN_MAX,
                                    &patmbs);
-                               if (pclen == (size_t)-1 || pclen == (size_t)-2)
+                               if (pclen == 0 || pclen == (size_t)-1 ||
+                                   pclen == (size_t)-2)
                                        return (FNM_NOMATCH);
                                pattern += pclen;
                        }

Modified: stable/11/lib/libc/tests/gen/fnmatch_testcases.h
==============================================================================
--- stable/11/lib/libc/tests/gen/fnmatch_testcases.h    Mon Aug 14 23:46:10 
2017        (r322523)
+++ stable/11/lib/libc/tests/gen/fnmatch_testcases.h    Tue Aug 15 00:54:16 
2017        (r322524)
@@ -131,7 +131,7 @@ struct testcase {
        { "\\(", "\\(", 0, FNM_NOMATCH },
        { "\\a", "\\a", 0, FNM_NOMATCH },
        { "\\", "\\", 0, FNM_NOMATCH },
-       { "\\", "", 0, 0 },
+       { "\\", "", 0, FNM_NOMATCH },
        { "\\*", "\\*", FNM_NOESCAPE, 0 },
        { "\\?", "\\?", FNM_NOESCAPE, 0 },
        { "\\", "\\", FNM_NOESCAPE, 0 },
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