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);