controlling terminal now a vnode; remove vhangup

header file cleanups; vput, vrele, and vref move to vfs_subr.c

va_bytes is really bytes; return st_blocks in S_BLKSIZE (512) units

replace vn_access with vn_writechk;
break up vn_access into its constituent parts vn_writechk and VOP_ACCESS

must vrelse vnode if VOP_OPEN fails; add vref

return flags and generation number in stat structure

update from Rick Macklem to generate proper error messages

merge in vnodes

use new form of suser()

../machine => machine

4.3BSD release version

Add copyright

add gid_t for groups; copy u.u_groups to int array for copyin/out

Change to includes. no more ../h

rework `namei' interface to eliminate global variables

4.2 distribution

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

tighten up group search by checking for NOGROUP terminator

fix problem with access and setgid being incompatible

group checks backwards

sun merge

merge of 4.1b and 4.1c

allow writing on special files in read-only filesystem

openi returns values

new groups stuff