dan@BBN-UNIX@sri-unix (05/27/82)
From: Dan Franklin <dan@BBN-UNIX> Date: 26 Apr 1982 11:19:54 EDT (Monday) Some of the V7 UNIX prim.c routines, in particular ndqb and ndflush, apparently implement a different kind of clist in which c_cf and c_cl, rather than pointing to a list of cblocks, point to a single contiguous block of storage not obtained from cfreelist. In this mode, c_cc is negative. I don't know why none of the other prim.c routines appear to handle this case--in particular getc and q_to_b. But most of the routines appear to have been changed to at least treat such a clist as though it were empty. It really has the look of something partially implemented, and I don't know of any kernel code that uses it; does anyone else?