[PATCH 1/3] kernelbase: PathAllocCanonicalize leave leading dots
Jeff Smith
whydoubt at gmail.com
Wed Sep 18 12:12:09 CDT 2019
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47766
Signed-off-by: Jeff Smith <whydoubt at gmail.com>
---
dlls/kernelbase/path.c | 33 ++++++++++++++++++---------------
1 file changed, 18 insertions(+), 15 deletions(-)
diff --git a/dlls/kernelbase/path.c b/dlls/kernelbase/path.c
index 3defaf3965..465778f2a1 100644
--- a/dlls/kernelbase/path.c
+++ b/dlls/kernelbase/path.c
@@ -276,13 +276,8 @@ HRESULT WINAPI PathAllocCanonicalize(const WCHAR *path_in, DWORD flags, WCHAR **
continue;
}
- /* Keep the . if one of the following is true:
- * 1. PATHCCH_DO_NOT_NORMALIZE_SEGMENTS
- * 2. in form of a..b
- */
- if (dst > buffer
- && (((flags & PATHCCH_DO_NOT_NORMALIZE_SEGMENTS) && dst[-1] != '\\')
- || (dst[-1] != '\\' && src[2] != '\\' && src[2])))
+ /* Keep the .. if not surrounded by \ */
+ if ((src[2] != '\\' && src[2]) || (dst > buffer && dst[-1] != '\\'))
{
*dst++ = *src++;
*dst++ = *src++;
@@ -313,14 +308,8 @@ HRESULT WINAPI PathAllocCanonicalize(const WCHAR *path_in, DWORD flags, WCHAR **
}
else
{
- /* Keep the . if one of the following is true:
- * 1. PATHCCH_DO_NOT_NORMALIZE_SEGMENTS
- * 2. in form of a.b, which is used in domain names
- * 3. *.
- */
- if (dst > buffer
- && ((flags & PATHCCH_DO_NOT_NORMALIZE_SEGMENTS && dst[-1] != '\\')
- || (dst[-1] != '\\' && src[1] != '\\' && src[1]) || (dst[-1] == '*')))
+ /* Keep the . if not surrounded by \ */
+ if ((src[1] != '\\' && src[1]) || (dst > buffer && dst[-1] != '\\'))
{
*dst++ = *src++;
continue;
@@ -352,6 +341,20 @@ HRESULT WINAPI PathAllocCanonicalize(const WCHAR *path_in, DWORD flags, WCHAR **
/* End the path */
*dst = 0;
+ /* Strip multiple trailing . */
+ if (!(flags & PATHCCH_DO_NOT_NORMALIZE_SEGMENTS))
+ {
+ while (dst > buffer && dst[-1] == '.')
+ {
+ if (dst - 1 > buffer && dst[-2] == '*')
+ break;
+ else if (dst - 1 > buffer && dst[-2] == ':' && dst - 2 == root_end)
+ *--dst = '\\';
+ else
+ *--dst = 0;
+ }
+ }
+
/* If result path is empty, fill in \ */
if (!*buffer)
{
--
2.21.0
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