posix signals

correct cuserid error case; make setlogin invalidate getlogin cache; KNF

rename IOT to ABRT (posix); add SIGINFO

duplicate "effective" group id in groups, so not lost when execing setgid

typo

need newline for console, too

no longer forks; delete LOG_NOWAIT and rephrase LOG_CONS
reformat alphabetically

reformat structure, add new vnode fields, document st_blocks is 512 units

do not return FSTAB_XX entries

update for new fstab format that supports vnodes

update for new format used by NFS

POSIX requires file descriptor to be close-on-exec

update for vnode interface

converted to POSIX (I think)

keywords, copyr and rev 5

mv iexten

don't worry about blocking on the console, or about inheriting the
console as the controlling terminal (fixed in kernel).

ANS says that any positive value indicates that DST is on, not just 1

use waitpid to avoid swallowing children; minor cleanups

vnodes

fixed backwards copy by words

make it compile *and* work (and portable)

written by Earl Cohen; add Berkeley specific copyright

written by Sam Leffler; Berkeley copyright

written by Sam Leffler; Berkeley copyright