On Sat, Feb 11, 2012 at 10:27:42PM +0000, David Laight wrote: > On Sat, Feb 11, 2012 at 02:04:23AM -0500, Mouse wrote: > > I find myself wanting something I'm tentatively calling O_NOACCESS, > > which is basically "open for neither read nor write". (I want this > > mostly so I can open a --x directory for fchdir() purposes.) > > > > Looking at sys_open(), I see that one of the first checks it does is > > > > if ((flags & (FREAD | FWRITE)) == 0) > > return (EINVAL); > > Not the least of your problems is that the user specifies one of > O_RDONLY, O_WRONLY or O_RDWR - which are 0, 1 and 2. > Makes it a little difficult to request 'no access'.
There is no problem. O_NOACCESS would be 3. When converted from O_* to F* it becomes 0. The fact that the O_ flags were not intelligently specified aeons ago so that a conversion is required is regrettable, but at this point unfixable. -- David A. Holland dholl...@netbsd.org
