[reactos] 04/06: [VFATFS] Always provide a short name for FATX files (equal to long name)

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=0979fb29e2647a607c404…

commit 0979fb29e2647a607c40497f743cd6958931517c
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Tue Sep 13 23:24:39 2022 +0200
Commit:     hpoussin <32227662+hpoussin(a)users.noreply.github.com>
CommitDate: Sat Sep 24 12:12:33 2022 +0200

    [VFATFS] Always provide a short name for FATX files (equal to long name)
    
    If no short name is provided, driver will think that the partition is corrupted.
    
    CORE-16373
---
 drivers/filesystems/vfatfs/direntry.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/filesystems/vfatfs/direntry.c
b/drivers/filesystems/vfatfs/direntry.c
index 2247637c8b3..8b5f8757319 100644
--- a/drivers/filesystems/vfatfs/direntry.c
+++ b/drivers/filesystems/vfatfs/direntry.c
@@ -497,10 +497,9 @@ FATXGetNextDirEntry(
         switch (DirContext->DirIndex)
         {
             case 0: /* entry . */
-                DirContext->ShortNameU.Buffer[0] = 0;
-                DirContext->ShortNameU.Length = 0;
                 wcscpy(DirContext->LongNameU.Buffer, L".");
                 DirContext->LongNameU.Length = sizeof(WCHAR);
+                DirContext->ShortNameU = DirContext->LongNameU;
                 RtlCopyMemory(&DirContext->DirEntry.FatX,
&pDirFcb->entry.FatX, sizeof(FATX_DIR_ENTRY));
                 DirContext->DirEntry.FatX.Filename[0] = '.';
                 DirContext->DirEntry.FatX.FilenameLength = 1;
@@ -508,10 +507,9 @@ FATXGetNextDirEntry(
                 return STATUS_SUCCESS;
 
             case 1: /* entry .. */
-                DirContext->ShortNameU.Buffer[0] = 0;
-                DirContext->ShortNameU.Length = 0;
                 wcscpy(DirContext->LongNameU.Buffer, L"..");
                 DirContext->LongNameU.Length = 2 * sizeof(WCHAR);
+                DirContext->ShortNameU = DirContext->LongNameU;
                 RtlCopyMemory(&DirContext->DirEntry.FatX,
&pDirFcb->entry.FatX, sizeof(FATX_DIR_ENTRY));
                 DirContext->DirEntry.FatX.Filename[0] =
DirContext->DirEntry.FatX.Filename[1] = '.';
                 DirContext->DirEntry.FatX.FilenameLength = 2;
@@ -603,10 +601,9 @@ FATXGetNextDirEntry(
             fatxDirEntry++;
         }
     }
-    DirContext->ShortNameU.Buffer[0] = 0;
-    DirContext->ShortNameU.Length = 0;
     StringO.Buffer = (PCHAR)fatxDirEntry->Filename;
     StringO.Length = StringO.MaximumLength = fatxDirEntry->FilenameLength;
     RtlOemStringToUnicodeString(&DirContext->LongNameU, &StringO, FALSE);
+    DirContext->ShortNameU = DirContext->LongNameU;
     return STATUS_SUCCESS;
 }