glibc/SOURCES/glibc-rh819430.patch

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2020-02-04 14:27:32 +00:00
Short description: fnmatch() fails with MBCS.
Author(s): Fedora glibc team <glibc@lists.fedoraproject.org>
Origin: PATCH
Bug-RHEL: #819430, #826149, #826151
Bug-Upstream: #14185
Upstream status: not-submitted
fnmatch() fails when '*' wildcard is applied on the file name
containing multi-byte character(s)
This needs to be reviewed thoroughly and go upstream with a
new test case.
diff -Nrup a/posix/fnmatch.c b/posix/fnmatch.c
--- a/posix/fnmatch.c 2012-01-01 07:16:32.000000000 -0500
+++ b/posix/fnmatch.c 2012-05-23 14:14:29.099461189 -0400
@@ -333,6 +333,7 @@ fnmatch (pattern, string, flags)
# if HANDLE_MULTIBYTE
if (__builtin_expect (MB_CUR_MAX, 1) != 1)
{
+ const char *orig_pattern = pattern;
mbstate_t ps;
size_t n;
const char *p;
@@ -356,10 +357,8 @@ fnmatch (pattern, string, flags)
alloca_used);
n = mbsrtowcs (wpattern, &p, n + 1, &ps);
if (__glibc_unlikely (n == (size_t) -1))
- /* Something wrong.
- XXX Do we have to set `errno' to something which mbsrtows hasn't
- already done? */
- return -1;
+ /* Something wrong: Fall back to single byte matching. */
+ goto try_singlebyte;
if (p)
{
memset (&ps, '\0', sizeof (ps));
@@ -371,10 +370,8 @@ fnmatch (pattern, string, flags)
prepare_wpattern:
n = mbsrtowcs (NULL, &pattern, 0, &ps);
if (__glibc_unlikely (n == (size_t) -1))
- /* Something wrong.
- XXX Do we have to set `errno' to something which mbsrtows hasn't
- already done? */
- return -1;
+ /*Something wrong: Fall back to single byte matching. */
+ goto try_singlebyte;
if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
{
__set_errno (ENOMEM);
@@ -401,14 +398,8 @@ fnmatch (pattern, string, flags)
alloca_used);
n = mbsrtowcs (wstring, &p, n + 1, &ps);
if (__glibc_unlikely (n == (size_t) -1))
- {
- /* Something wrong.
- XXX Do we have to set `errno' to something which
- mbsrtows hasn't already done? */
- free_return:
- free (wpattern_malloc);
- return -1;
- }
+ /* Something wrong: Fall back to single byte matching. */
+ goto free_and_try_singlebyte;
if (p)
{
memset (&ps, '\0', sizeof (ps));
@@ -420,10 +411,8 @@ fnmatch (pattern, string, flags)
prepare_wstring:
n = mbsrtowcs (NULL, &string, 0, &ps);
if (__glibc_unlikely (n == (size_t) -1))
- /* Something wrong.
- XXX Do we have to set `errno' to something which mbsrtows hasn't
- already done? */
- goto free_return;
+ /* Something wrong: Fall back to singlebyte matching. */
+ goto free_and_try_singlebyte;
if (__glibc_unlikely (n >= (size_t) -1 / sizeof (wchar_t)))
{
free (wpattern_malloc);
@@ -450,6 +439,10 @@ fnmatch (pattern, string, flags)
free (wpattern_malloc);
return res;
+ free_and_try_singlebyte:
+ free(wpattern_malloc);
+ try_singlebyte:
+ pattern = orig_pattern;
}
# endif /* mbstate_t and mbsrtowcs or _LIBC. */