-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 04/25/2014 04:04 PM, Wesley Hardman wrote: > On 2014-04-25 15:26, Zack Weinberg wrote: > > Shouldn't creating a file or directory, simply inherit the > permissions from the parent? That is what I would expect (at > least on Windows) when saving a file. Why would there be a need > to explicitly set the permissions?
That's simply not how it works on Unixy systems. The owning UID of a new file or directory is always set to the effective UID of the process that created it. The basic user/group/other permissions are always set to the mode argument to open() or mkdir(), and-not the umask. Under some circumstances the parent directory determines the group ownership and the ACL, but the normal case is that the GID is also determined by the creating process, and there is no ACL. (It now occurs to me that if the download manager moves files to a different directory after it finishes downloading them, we need to reset their ACL and group ownership as well as applying the umask. On Unix this might be impossible, e.g. if group ownership inherits from the directory but the current user is not a member of the directory's group; it might be better to just create files in the ultimate target directory if we aren't already.) zw -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iQIcBAEBCAAGBQJTW9F0AAoJEJH8wytnaapko+wP/jPPsn22OlRXCsb+HQOMZSE3 4aiCLUbohEHeXqSElguheQUyYOCNxGuu0z4HM4pQRWf1fPX44wEExUHj1M1X0fRb nRXriyYMU3AjZqb6rBH0EwQjSE70+7RAFwoTK9IdiRDWjYlr114hmRRdHdbo5+xQ 2ARElVslCeiWd3Z4E6O2fOF+vAF0w09KkyMrAqOfRCYqNXbVfeQ/LJgMqpcJtenq uiSDtYGlXQ+7FWbfgJQ5TYfsRSm8xprWymgTuW/ywwbIpSASQOnk4kzQdyw+Uz72 rxepz0ocO6FDjePEToahyPkaFX/5hd3lnQcnmDO9j3PrxXzTaeOYypQdNCEf5oBy 9ytts3nHPxgeR/bezYsaocGdI6qaePabKfF40Y8v9eLc96Kl1OFjmCBw0te9Aic0 SrCEwFzUI0Nkf33s51n+b1hANKE/Q6jX1NbFr6ot1XVQJ4Ht++q8S3FZlnBW1rQP k3VJYJEMd9Zi4HzPGjbhh61qjpJzB7lDyVsqHnhQHZRJI4heYaTTU9NiYln4M6sH EwvDEjAqwQbYoLozOcsz8X74f2oj5XTT00nhs37fJRShqdXIhRGFpCI2yRLfaoil a0X2QeMUCUlYRSz798H8tMLRmDi3bidSZgrq6fpGsAaWhacVwxb+L7UoeD8jAo+0 t/jmYtOiXzbZ26Z73h0Q =JdFz -----END PGP SIGNATURE----- _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
