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Date: | Sat, 11 Apr 2015 14:35:42 +0200 |
From: | David Macek <david DOT macek DOT 0 AT gmail DOT com> |
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To: | cygwin AT cygwin DOT com |
Subject: | Re: [TESTERS needed] New POSIX permission handling |
References: | <20150410100703 DOT GA4401 AT calimero DOT vinschen DOT de> <87lhhzcarc DOT fsf AT Rainer DOT invalid> <5528E2ED DOT 7090105 AT gmail DOT com> <20150411095958 DOT GD19111 AT calimero DOT vinschen DOT de> |
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--------------ms000506000805050208090801 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 11. 4. 2015 11:59, Corinna Vinschen wrote: >> Out of curiosity, does the code somehow distinguish ACLs that don't >> have these default permissions (or have different permissions set for >> SYSTEM / Administrators)? >=20 > I don't quite understand the question. >=20 > For a start, I'd like to point out how POSIX ACLs are supposed to work. > http://linux.die.net/man/5/acl is a good start. This is our role model. I'm gonna read that. > The new code will compute the mask the same way as before, but it > skips the permissions of SYSTEM and Administrators while doing that. > That means, the POSIX group permission bits are not affected by > the Windows-typical permissions of SYSTEM and Administrators. >=20 > Example: >=20 > User rw- > Primary group r-- > Other user rw- > Other group r-- > SYSTEM rwx > Everyone --- >=20 > The computed POSIX MASK/CLASS_OBJ value in Cygwin 1.7.35 is the sum > of all group and secondary user permissions >=20 > rw- | r-- | rwx =3D=3D rwx >=20 > The new code ignores SYSTEM, thus the mask is >=20 > rw- | r-- =3D=3D rw- >=20=20=20=20=20=20 > Does this explain it sufficiently? Yes, thank you. My question was about the case where SYSTEM or Administrato= r doesn't have the typical permissions. From this explanation, I assume tha= t I won't be able to see any difference in the mask in that case, but it do= esn't seem to be a bad thing. --=20 David Macek --------------ms000506000805050208090801 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEH AQAAoIIMbzCCBjMwggUboAMCAQICAwxvejANBgkqhkiG9w0BAQsFADCBjDEL MAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0YXJ0Q29tIEx0ZC4xKzApBgNVBAsT IlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcxODA2BgNVBAMT L1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50 IENBMB4XDTE0MTIzMTA0MDkwNFoXDTE2MDEwMTE1NDg1M1owSjEgMB4GA1UE AwwXZGF2aWQubWFjZWsuMEBnbWFpbC5jb20xJjAkBgkqhkiG9w0BCQEWF2Rh dmlkLm1hY2VrLjBAZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A MIIBCgKCAQEApuk8134+nkISIg7X7ABwKnVLgZsYi5kdXeeWpUrF1YLdLsZL 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