add system wide cacheing of path names in namei() (from kre)

code for interrupted open calls tested (it works)

kludge to allow `badsect' to set block numbers

4.2 distribution

typo

parameter checking in lseek

cleanup fstat

collect all the compatibility stuff in single files

must do a complete path check when moving directories to new parent

merge of bill's code plus lint (plus, of course, cleanup of bill's bugs)

purge mush; stuff for i_blocks

blew it, can't allow anyone but super-user to chown

add utimes call; protection fixes galore

oops

check delete permission on source before doing any work

fix incompatibility between access and setgid

have direnter return errors so new inodes can be thrown away

patch two holes in rename

irele should be iput in rename

avoid linked to directories as targets; iput and irele on
directory inodes can clear u.u_error, so kludge things for the moment
to insure important errors get back to the user

copyin & copyout now return EFAULT and all callers uniformly
return (or ignore) this value

zero trash in stat structure

use ENOTEMPTY errno

u.u_pofile flags are now UF_*

merge of 4.1b and 4.1c