use new form of suser()

don't allow more than LINK_MAX links

fix chown; don't steal groups or give away files

don't clear set-gid when su creates file when not groupmember

only set ICHG when fsync'ing a file descriptor that is open for writing

4.3BSD release version

relax restrictions on *chown: allow owner to change group if member

lint

allocate file table entry before creating file in case file table is full

fix whole in sticky directories

Add copyright

return EINVAL instead of ENXIO for readlink of a non symbolic link;
check for read-only file system in [f]chmod, [f]chown, and utimes;
do not clear the sticky bit when modifying directories

do not follow symbolic links on exclusive open (from kre)

insure that directories are always a multiple of DIRBLKSIZ in size

cannot use ni_pdir when `namei' fails

Change to includes. no more ../h

rewrite `rename' and `rmdir' to properly invalidate the cache

use new `cacheinval' macro

rework `namei' interface to eliminate global variables

save time, use ILOCK and IUNLOCK to avoid call overhead

Follow same protocol as `unlink' to prevent potential race condition.

rename: if source has gone away when time to unlink, don't touch
link count (consider race with unlink)

convert namei cache to hold soft references to inodes so that
. and .. may be placed in the cache

correct error code for lseek on pipes/sockets; in-line expand
getf in getinode

open(...,FTRUNC...) requires write permission