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Date: Wed, 13 Apr 2016 09:11:28 -0400
From: John Cowan <cowan@mercury.ccil.org>
To: cygwin@cygwin.com
Subject: Re: Conflict between Cygwin 1.7 and Ubuntu for Windows 14316
Message-ID: <20160413131128.GA3162@mercury.ccil.org>
References: <20160413052257.GB28803@mercury.ccil.org> <CA+Fg1xY46ANusM1MeZozkQ1u0+AHwd=vJDoWo7867az3wxPNBQ@mail.gmail.com> <CACmJb3yHO_VhiDoyn33d+7R_rq8Bqco6VMuTdG622Bu2u52fHA@mail.gmail.com>
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User-Agent: Mutt/1.5.20 (2009-06-14)

LLoyd scripsit:

> John, if you can confirm?

Exactly right.

> Please also provide the "cat /mnt/c/file1" and "cat /mnt/c/file2" from UoW.

From the Cygwin shell (note that my Cygwin and Windows home directories
are the same: /home/cowan is a Cygwin symlink to /cygdrive/c/Users/cowan):

cowan@large-skunk ~
$ echo stuff >file1

cowan@large-skunk ~
$ cat file1
stuff

cowan@large-skunk ~
$ ls -l file1
-rw-r--r--+ 1 cowan cowan 6 Apr 13 08:57 file1

From cmd.exe:

c:\Users\cowan>echo stuff >file2

c:\Users\cowan>type file2
stuff

From UoW bash prompt:

root@localhost:~# cd /mnt/c/Users/cowan
root@localhost:/mnt/c/Users/cowan# cat file1
cat: file1: Permission denied
root@localhost:/mnt/c/Users/cowan# cat file2
stuff
root@localhost:/mnt/c/Users/cowan# ls -l file1 file2
-rwxrwxrwx 1 root root 6 Apr 13 12:57 file1
-rwxrwxrwx 1 root root 8 Apr 13 12:57 file2

As you can see, they look exactly the same but are different somehow.
What is more, if I use cmd.exe echo to append to file1 and Cygwin echo
to append to file2, it changes nothing.  Likewise, if I overwrite them
completely, it changes nothing.  Only if I remove them and re-create
them from the "wrong" side does file1 become readable and file2 become
unreadable.

This is 64-bit Windows on an NTFS file system, but 32-bit Cygwin.  I'll
try installing Cygwin64 tonight and seeing if that makes any difference.

-- 
John Cowan          http://www.ccil.org/~cowan        cowan@ccil.org
A: "Spiro conjectures Ex-Lax."
Q: "What does Pat Nixon frost her cakes with?"
  --"Jeopardy" for generative semanticists

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