am I missing something, or are permissions always preserved?

Dave Dykstra dwd at
Tue Jan 7 22:51:01 EST 2003

That sounds reasonable to me that rsync shouldn't try to preserve those
extra bits without -p.  Try making a patch and seeing if that works.

I don't have Samba set up, but on a vfat filesystem on Linux rsync is
doing even worse because after the initial file creation it does a
"fchmod(fd, 0600)" which fails and it doesn't even copy files at all.

- Dave

On Wed, Jan 01, 2003 at 02:24:36PM -0800, Ben wrote:
> I'm not sure what POSIX calls for, but on both Linux and AIX (the two
> unix OSes I have access to) I can leave off the mode arg when calling
> open(2). Granted, doing so gives me a mode that normally isn't so good,
> but in my case this would be fine, as I have samba forcing modes to be
> what I want them to be.
> However, after looking into this more, it turns out that samba
> apparently causes chmod(2) to fail _only_ when trying to set modes
> S_ISUID, S_ISGID, or S_ISVTX. Trying to set these modes in open(2), or
> trying to set any other modes in open(2) or chmod(2), silently fails
> without raising an error.
> So while this might well be a samba problem, it could be avoided if
> rsync behaved as I would expect it to. The original files do indeed have
> S_ISGUID set on them, but I don't see why rsync should try to preserve
> this if I didn't tell it to preserve permissions.
> On Wed, 2003-01-01 at 07:13, Green, Paul wrote:
> > Ben [mailto:bench at]
> > 
> > > I'm relatively new to rsync, but it seems to me that if there's an
> > > option to perserve permissions and you don't set it, then rsync
> > > shouldn't do anything with permissions.
> > 
> > Sounds good, but recall how POSIX / Unix system calls work. To create a
> > file, you have to specify what mode (permission) it should have.  There is
> > no way to tell creat() or open() to "do the default thing."
> > 
> > I think a case could be made that this is a defect / incompatibility in the
> > underlying file system layer that issues complaints about permissions.
> > Before I attempted to code any kind of a fix, I'd sure want to read the
> > specs of this layer and understand how the designers thought this problem
> > should be approached.
> > 
> > Thanks
> > PG

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