> a) the MR is unnecessary, and possibly dangerous. Omitting a link > mode will give the user whatever was defined as the default mode in > the directory, which might possibly have been R/O.
In general, yes, but in the specific case, he was planning on writing on the disks, so wanted to be specific. > b) if the user was in virtual machine input mode (or whatever it is > called) - as seems to be the case in your example, since you > specified #CP, then why add the BEGIN? Safety. If he for some reason logged in, he'll get a console interrupt, which will likely pause the guest. The BEGIN is just insurance that the CP idle timer doesn't nuke him 15 minutes later.
