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[USETUP] When overwriting a file, if open fails, it might be because the file is readonly.

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In such situation, try to drop the readonly attribute before overwritting the file.

This fixes setup not being able to overwrite FAT bootcode when reusing a FAT partition
already installed without reformatting.

CORE-14158
This commit is contained in:
Pierre Schweitzer 2018-01-04 21:47:59 +01:00
parent f555c102b7
commit 82f44a2107
No known key found for this signature in database
GPG key ID: 7545556C3D585B0B
1 changed files with 66 additions and 2 deletions
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68
base/setup/usetup/filesup.c
View file

@ -348,8 +348,72 @@ SetupCopyFile(
0);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateFile failed: %x, %wZ\n", Status, &FileName);
goto unmapsrcsec;
/* Open may have failed because the file to overwrite
* is in readonly mode
*/
if (Status == STATUS_ACCESS_DENIED)
{
FILE_BASIC_INFORMATION FileBasicInfo;
/* Reattempt to open it */
Status = NtCreateFile(&FileHandleDest,
GENERIC_WRITE | SYNCHRONIZE,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_OPEN,
FILE_NO_INTERMEDIATE_BUFFERING |
FILE_SEQUENTIAL_ONLY |
FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0);
/* Fail for real if we cannot open it that way
* XXX: actually, we should try to refine access rights
* to only have write_attributes, should be enough
*/
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateFile failed: %x, %wZ\n", Status, &FileName);
goto unmapsrcsec;
}
/* Zero our basic info, just to set attributes */
RtlZeroMemory(&FileBasicInfo, sizeof(FileBasicInfo));
/* Reset attributes to normal, no read-only */
FileBasicInfo.FileAttributes = FILE_ATTRIBUTE_NORMAL;
/* We basically don't care about whether it succeed:
* if it didn't, later open will fail
*/
NtSetInformationFile(FileHandleDest, &IoStatusBlock, &FileBasicInfo,
sizeof(FileBasicInfo), FileBasicInformation);
/* Close file */
NtClose(FileHandleDest);
/* And re-attempt overwrite */
Status = NtCreateFile(&FileHandleDest,
GENERIC_WRITE | SYNCHRONIZE,
&ObjectAttributes,
&IoStatusBlock,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_OVERWRITE_IF,
FILE_NO_INTERMEDIATE_BUFFERING |
FILE_SEQUENTIAL_ONLY |
FILE_SYNCHRONOUS_IO_NONALERT,
NULL,
0);
}
/* We failed */
if (!NT_SUCCESS(Status))
{
DPRINT1("NtCreateFile failed: %x, %wZ\n", Status, &FileName);
goto unmapsrcsec;
}
}
RegionSize = (ULONG)PAGE_ROUND_UP(FileStandard.EndOfFile.u.LowPart);