On Jan 8 12:07, John Smith wrote: > >That's not how it works for me, even with Notepad. It only changes > >the file content, not the ownership. > > If you create a file outside of cygwin, you should see it as a group > of none, correct? Then if you update that file's group using cygwin > to "chgrp Users", cygwin reports that file correctly changed groups. > But the problem comes now when I that file again outside of cygwin, > then look at the file again in cygwin, the group has once again > reverted to ?????. I don't recall seeing this happen on a previous > install (I've used cygwin for years) but some new things for me is > that I'm running Win 8.1 (user is that windows live account) and I'm > also trying out cygwin64. > > Are you able to test this
Almost. I'm using a domain user account but the mechanism is the same. > and say you are not seeing this? I'm not seeing this. Creating the file with Notepad sets user and group to myself and my primary domain group. `Chgrp Users' on that file changes the group to the group Users, which is a local (==non-domain) predefined group, which is confirmed by ls -l. Then I start Notepad on the same file again, change it, and save the changes. Afterwards, the file's group is still "Users". > >>In *nix, once you change a group, just editing a file won't change > >>the group back to something else. > > > >That doesn't happen on Cygwin, too. > > This is the behavior I'm seeing -- so maybe cygwin isn't really able > to change the group, then? Yes, it can. Changing the group does change the security descriptor on disk. The effect you're seeing is weird, but it's not how Cygwin usually works. > But again once I > edit that file the group reverts to ???? and I lose group > permissions again. I don't get it. Me neither. But see below. > My apologies, I was just thinking that if I could get my programs to > open up and make them set the default group to Users whenever they > add/edit/update/etc a file that might solve the issue, but I am not > sure that will at this point. And I'd have to find some way to do > that across the board, which I think you said wouldn't work. It works for Cygwin and non-Cygwin processes started from a Cygwin process. It does not work for processes started from explorer. OTOH, I don't understand what you're trying to accomplish. You can just change the name of the "none" (or "HomeUser", see below) group in /etc/group and be happy. The group membership doesn't really matter on a non-domain standalone system anyway. > > Try the icacls command on a file to see > >what it prints and compare the info with your passwd and group files. > > I'm not sure how to read this. It's giving me a list of > permissions, but how do I know what group cygwin sees? You don't. Windows doesn't use the primary group field for any purpose, so there's no reason for a WIndows tool to print the primary group. At least, so far Windows never used the primary group for any purpose, but see below. > I can > understand this is the hierarchy of permissions, but I don't see a > "none" group anywhere -- It's not a hirarchy. It's just a list. And, yes, the None group is missing. But here I'm wondering. Do you have the HomeUsers group in /etc/group? If not, add it. I can't be sure, but it seems that Windows uses that group as primary group if you're using the HomeGroup sharing stuff, which I have no experience with. I tried to reproduce this, but this is apparently not enabled on enterprise systems. But I read a bit about it, and it seems to have a life on its own, for instance: http://www.tomshardware.co.uk/forum/27119-63-remove-user-homeusers-win7 http://social.technet.microsoft.com/Forums/windows/en-US/4d059295-838e-4e81-9658-823897a5bda2/ Probably best not to use it and only use normal workgroup sharing. > icacls cc.txt > cc.txt WHITELANCER\John:(RX) > Whitelancer\HomeUsers:(I)(RX) > BUILTIN\Administrators:(I)(F) > NT AUTHORITY\SYSTEM:(I)(F) > WHITELANCER\John:(I)(F) > Everyone:(I)(RX) > > If that is the case, how do I make a manual entry in my /etc/group > for a "John" group? Don't. That's your user account. It doesn't belong into /etc/group. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
pgpp1SawZW_HI.pgp
Description: PGP signature
