Why do file permissions change after editing a file with vim?

[Ross Jordan <rjordan at numb dot ca>]

When I modify files with cygwin's vim, they become inaccessible. It seems the
permissions are getting changed when I save the file. Any idea why this is
happening? This does not happen from a bash shell, only when I directly
launch vim from a windows cmd.exe window. See below.

D:\ver
Microsoft Windows [Version 6.0.6000]

D:\>where vim.exe
c:\cygwin\bin\vim.exe

d:\>echo t > test

d:\>attrib test
A            D:\test

d:\>icacls test
test BUILTIN\Administrators:(I)(F)
     NT AUTHORITY\SYSTEM:(I)(F)
     NT AUTHORITY\Authenticated Users:(I)(M)
     BUILTIN\Users:(I)(RX)

Successfully processed 1 files; Failed processing 0 files

d:\vim test

[Add a characted and save :wq!]

d:\>more test
Cannot access file D:\test

d:\>attrib test
A    R       D:\test

d:\>icacls test
test DOMAIN\rjordan:(D,Rc,WDAC,WO,WEA,WA)
     DOMAIN\Domain Users:(Rc,REA,RA)
     Everyone:(Rc,REA,RA)

Successfully processed 1 files; Failed processing 0 files

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