On Wed, 9 Aug 2000, Bob Nestor wrote:

> This is the code I have now and it still doesn't work:
> 
>     /*          
>      * Now we need to set the in-core label.  The mac68k port doesn't do
>      *  disk labels and right now there's no way to get the on-disk
>      *  label in-core without rebooting, but we'll try anyway. Actually
>      *  if the disk was previously unlabeled this will work.
>      */  
>     writeable = 1;
>     ioctl(fd, DIOCWLABEL, (char *)&writeable);   /* Make label writeable 
> */
>     if (ioctl(fd, DIOCWDINFO, &bsdlabel) != 0)
>         ioctl(fd, DIOCSDINFO, &bsdlabel);
>     writeable = 0;
>     ioctl(fd, DIOCWLABEL, (char *)&writeable);   /* Make it R/O now */
>     fsync(fd);
>     /*  
>      * Well, if we get here the dirty deed has been done. 
>      */  
>     close (fd);
>     /*  
>      * Force the system to flush the disk buffers to disk
>      */
>     sync();
> 
> Any ideas?

Oh, yes, that won't work.

You definitly don't want to do DIOCWDINFO as there's no clean way to go
from a disklabel structure to what needs to be on disk.

I thought when this last came up, the concensus was to write the on-disk
label (the apple partition map), and then either load a label into the
kernel, or have the kernel reload the label off disk.

I think re-reading would be the cleanest.

Scott, weren't you going to make a new ioctl to do that?

Take care,

Bill