Re: Strange behavior with x! and permissions

On 2017-05-03, Christian Brabandt wrote:
> Hi Gary!
>
> On Mi, 03 Mai 2017, Gary Johnson wrote:
>
> > On 2017-05-03, Christian Brabandt wrote:
> > > Hi Niels!
> > >
> > > On Mi, 03 Mai 2017, Niels Kobschätzki wrote:
> > >
> > > > I found today the following on a Debian 8.7 (vim 7.4.576) and FreeBSD 11
> > > > (8.0.579): I am in my home-dir "user" and there I create a file with the
> > > > following permissions: root:user 640
> > > >
> > > > When I open the file as "user", vim tells me that the file is read-only.
> > > > I edit it, and close it with :x!
> > > > vim writes the file and sets the permissions to:
> > > > user:user 640
> > > >
> > > > I didn't use sudo or anything. When I tried to do a chown or chmod on
> > > > this file to set the permissions to user:user from root:user it failed
> > > > because "user" didn't have the permissions.
> > > >
> > > > What is happening here?
> > >
> > > The user has write permissions on the directory, therefore he can
> > > happily delete the file owned by root and create a new file. And that is
> > > what Vim is doing.
> >
> > If that was true, I would expect the inode number of the file to be
> > different after Vim had edited it, but that is not what I observe.
> > The inode number is unchanged.
> >
> > I created a file with only read permissions and successfully edited
> > it with Vim. I repeated the experiment in a directory with only
> > read and execute permissions and was able to edit that file as well.
>
> Did you check the backupcopy option?

'backupcopy' is set to "yes".

Regards,
Gary

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