So I have a guest whose /usr I want to freeze and stick into a DCSS. I can easily do this if the DCSS is SW or EW.
But I really want an SR DCSS, since I want everyone to share the filesystem but I don't want anyone (except the owner) to write to it ever, and the owner only to do so very infrequently. Can I modify the permissions on a DCSS to do this? If not, how can I do the initial load of the DCSS? Rick Troth has a way of doing it where he mounts a scratch disk, mounts a file via the loopback driver, and then copies the filesystem into the file on the scratch disk. Then he uses FTP or something like that to get the file into CMS space, and then a pipeline to force the contents of the file into storage. All this before the SAVESEG. That seems a little kludgey to me. Especially since if I have the segment W, I can just mount /proc/dcssblk/SHRUSR and do a "cp -a" to load it up. But then I don't know how, having done that and then saved the segment, I can prevent anyone else from writing the segment. Help? Adam
