Files with attribute temporary invisible in cygwin

[Pavel Kudrna <Pavel dot Kudrna at mff dot cuni dot cz>]

There exist files in windows 7 which can't be deleted using cygwin "rm" 
command. Files are visible from windows command line or Windows Explorer 
but are invisible by "ls -lA" command:

$   ls -lA `cygpath 'C:\ProgramData\Microsoft\Diagnosis\DownloadedSettings'`
total 16
-rwxrwx---+ 1 Administrators SYSTEM 1016 Aug 23  2017 
telemetry.ASM-WindowsDefault.json.bk
-rwxrwx---+ 1 Administrators SYSTEM  795 Aug 23  2017 utc.app.json.bk

Dir command from cmd.exe shows that there are 2 more files (with 
extension .json) previously invisible:

c:\>  dir C:\ProgramData\Microsoft\Diagnosis\DownloadedSettings /b
telemetry.ASM-WindowsDefault.json
telemetry.ASM-WindowsDefault.json.bk
utc.app.json
utc.app.json.bk

It seems to be connected with the temporary attribute which both 2 
mentioned files have set:

c:\>  for %i in 
(C:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\*) do @echo %~ai %i
--a----t- 
c:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\telemetry.ASM-WindowsDefault.json
--a------ 
c:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\telemetry.ASM-WindowsDefault.json.bk
--a----t- c:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\utc.app.json
--a------ 
c:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\utc.app.json.bk

Together with above mentioned 2 files

C:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\utc.app.json
C:\ProgramData\Microsoft\Diagnosis\DownloadedSettings\telemetry.ASM-WindowsDefault.json

I have found three more files in Windows 7

C:\ProgramData\Microsoft\Network\Downloader\qmgr0.dat
C:\ProgramData\Microsoft\Network\Downloader\qmgr1.dat
C:\Users\%USERNAME%\AppData\Local\Microsoft\Office\15.0\OfficeFileCache\LocalCacheFileEditManager\FSD-CNRY.FSD

with the same behavior (invisible by ls, undeletable by rm but visible 
from windows) and all have the temporary attribute set.

Files are invisible/undeletable with ls/rm even from WindowsPE which 
does not run from C: disk and can not keep those files open.

Pavel Kudrna

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