jwinsize
struct jwinsize jwinsize;
if (Pread(Proc, &jwinsize, sizeof (jwinsize), offset) ==
sizeof (jwinsize)) {
(unsigned)jwinsize.bytesx,
(unsigned)jwinsize.bytesy,
(unsigned)jwinsize.bitsx,
(unsigned)jwinsize.bitsy);
struct jwinsize *jwb;
tmp = allocb(sizeof (struct jwinsize), BPRI_MED);
mcopyout(mp, NULL, sizeof (struct jwinsize), NULL, tmp);
mioc2ack(mp, tmp, sizeof (struct jwinsize), 0);
jwb = (struct jwinsize *)mp->b_cont->b_rptr;