Cygwin making files inaccessible?
i.e. when Cygwin copies or writes to them, not random files.
C:\t>dir /s/b/a
C:\t>dir /q .
02/05/2022 04:11 AM <DIR> BUILTIN\Administrators .
02/05/2022 04:11 AM <DIR> NT SERVICE\TrustedInsta..
C:\t>cacls .
C:\t Everyone:(OI)(CI)F
C:\t>echo > 1.txt
C:\t>cacls 1.txt
C:\t\1.txt Everyone:F
C:\t>copy 1.txt 2.txt
1 file(s) copied.
C:\t>cacls 2.txt
C:\t\2.txt Everyone:F
C:\t>del 2.txt
C:\t>uname -a
CYGWIN_NT-10.0-WOW DESKTOP-BCFUMJ4 3.3.4(0.341/5/3) 2022-01-31 19:31 i686 Cygwin
C:\t>cp 1.txt 2.txt
C:\t>which cp
/usr/bin/cp
C:\t>cacls 2.txt
C:\t\2.txt NULL SID:(DENY)(special access:)
READ_CONTROL
DESKTOP-BCFUMJ4\jay:(DENY)(special access:)
FILE_READ_DATA
FILE_READ_EA
FILE_EXECUTE
DESKTOP-BCFUMJ4\jay:(special access:)
STANDARD_RIGHTS_ALL
DELETE
READ_CONTROL
WRITE_DAC
WRITE_OWNER
SYNCHRONIZE
STANDARD_RIGHTS_REQUIRED
FILE_READ_ATTRIBUTES
FILE_WRITE_ATTRIBUTES
DESKTOP-BCFUMJ4\None:R
Everyone:R
C:\t>more 1.txt
ECHO is on.
C:\t>more 2.txt
Cannot access file C:\t\2.txt
Same behavior from cygwin64.
C:\t>\cygwin64\bin\uname -a
CYGWIN_NT-10.0 DESKTOP-BCFUMJ4 3.3.3(0.341/5/3) 2021-12-03 16:35 x86_64 Cygwin
Huh?
I would hope Cygwin could/would just copy the ACLs asis.
I am guessing there is some failed attempt to translate them
to an internal form and then back to NT form.
My real scenario was open/write/read, not cp.exe.
- Jay
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