remove setjmp; new tsleep

new proc hashing (pointers, not indices)

tsleep

initial error code in compat code (from Mike@cs.utah.edu)

get rid of all users of a particular device

revoke controlling terminal when session leader exits

new wait macros, return errno instead of setting u.u_error

closef now returns an error code (which we ignore here)

remove WSIGRESTART; start count from 0 each time in wait

merge in vnodes

../machine => machine

cleanups

use malloc/free to hold zombie status

print errno when init can't be executed

merge in tahoe support

4.3BSD release version

need to raise ipl before freeing page tables (done by vrelu);
might as well free user struct before freeing the page tables that map it.

spl5 in exit is redundant

cleanup spgrp, rm unused code (should rm it all)

Add copyright

implement high-water mark on file descriptors in use;
printf when init can't be found;
M_WAIT is implemented!

eliminate double meaning of SOUSIG

recover from mbuf lossage during exit (logging event)

add another bit to sigvec() flags to disable system call restart

make spgrp use child pointers instead of linear searches