Re: OT: why no file copy() libc/syscall ??

From: Florian Weimer
Date: Thu Nov 20 2003 - 12:23:23 EST


Jesse Pollard wrote:

> > > int sys_copy(int fd_src, int fd_dst)
> >
> > Doesn't work. You have to set the security attributes while you open
> > fd_dst.
>
> Why? the open for fd_src should have the security attributes (both locally
> and in the file server if networked). Opening fd_dst should SET the security
> attributes desired (again, locally and in the target fileserver).

The default attributes in the new location might be less strict than the
attributes of the source file.

If sys_copy() is just an API to introduce a new copy-on-write hard link,
these problems disappear. They are only relevant if sys_copy() is
intended to be a generic "copy that file" interface.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/