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cp creates unreadable file on Windows 7
- From: "Frank, Matthew I" <matthew dot i dot frank at intel dot com>
- To: "cygwin at cygwin dot com" <cygwin at cygwin dot com>
- Date: Wed, 9 Oct 2013 21:30:52 +0000
- Subject: cp creates unreadable file on Windows 7
- Authentication-results: sourceware.org; auth=none
I believe my problem is identical to the one reported in:
http://cygwin.com/ml/cygwin/2012-02/msg00456.html, but that message chain ended with
"mount your file system noacl" which isn't an option for me, so I'm looking for
other alternatives.
I create a file using cmd.exe in a directory created by cmd.exe. Then in Cygwin bash I
mkdir a directory (two levels deep) and cp the file into the new directory. The resulting
file is not readable by any Windows or Cygwin executable. I can't say whether this is
correct or not, but it surprised me.
I am on a corporate network (logged in using network credentials). The filesystem is NTFS,
the machine is Windows 7. I am an Administrator on the machine. I am using the new 64-bit
Cygwin installed in c:\users\mifrank\cygwin64, but the problem was originally reported by
several of my users, and they are using slightly older 32-bit versions of Cygwin installed
in c:\cygwin.
Reproducer. Step 1 (must be done in a cmd.exe shell.)
C:\>md dos-level1
C:\>echo foo > dos-level1\bar
C:\>cat dos-level1\bar
foo
C:\>icacls.exe dos-level1\
dos-level1\ BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(OI)(CI)(RX)
NT AUTHORITY\Authenticated Users:(I)(M)
NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)
Successfully processed 1 files; Failed processing 0 files
C:\>icacls.exe dos-level1\bar
dos-level1\bar BUILTIN\Administrators:(I)(F)
NT AUTHORITY\SYSTEM:(I)(F)
BUILTIN\Users:(I)(RX)
NT AUTHORITY\Authenticated Users:(I)(M)
Successfully processed 1 files; Failed processing 0 files
Step 2 (from Cygwin bash shell)
$ cygcheck -V
cygcheck (cygwin) 1.7.25
$ cd /cygdrive/c/
$ groups
Domain Users Users
$ umask
0022
$ mkdir --parents cyg-level1/cyg-level2
$ cat dos-level1/bar
foo
$ cp dos-level1/bar cyg-level1/cyg-level2/
$ cat cyg-level1/cyg-level2/bar
cat: cyg-level1/cyg-level2/bar: Permission denied
$ icacls.exe cyg-level1/cyg-level2/
cyg-level1/cyg-level2/ AMR\mifrank:(F)
AMR\Domain Users:(RX)
Everyone:(RX)
BUILTIN\Administrators:(F)
NT AUTHORITY\SYSTEM:(F)
BUILTIN\Users:(RX)
NT AUTHORITY\Authenticated Users:(M)
CREATOR OWNER:(OI)(CI)(IO)(F)
CREATOR GROUP:(OI)(CI)(IO)(RX)
Everyone:(OI)(CI)(IO)(RX)
Successfully processed 1 files; Failed processing 0 files
$ icacls.exe cyg-level1/cyg-level2/bar
cyg-level1/cyg-level2/bar AMR\mifrank:(D,Rc,WDAC,WO,RA,WA)
AMR\Domain Users:(Rc,S,RA)
Everyone:(Rc,S,RA)
Successfully processed 1 files; Failed processing 0 files
On the other hand:
$ echo fromcyg > cyg-level1/cyg-level2/baz
$ cat cyg-level1/cyg-level2/baz
fromcyg
$ icacls.exe cyg-level1/cyg-level2/baz
cyg-level1/cyg-level2/baz AMR\mifrank:(R,W,D,WDAC,WO)
AMR\Domain Users:(R)
Everyone:(R)
Successfully processed 1 files; Failed processing 0 files
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