sys	open; ttyx; 0 / open this ttyx for reading
			      / and wait until someone calls
	bes	help1 / branch if trouble
	sys	open; ttyx; 1 / open this ttyx for writing after
			      / user call
	bes	help1 / branch if trouble
	sys	exec; getty; gettyp / getty types <login> and
				    / executes login which logs user
				    / in and executes sh-
	sys	exit / HELP!

help1:
	jmp	help / trouble

wtmprec:
	sys	time / get time
	mov	ac,zero+10. / more to output
	mov	mq,zero+12. / buffer
	sys	open; wtmp; 1 / open accounting file
	bes	2f
	mov	r0,r2 / save file descriptor
	sys	seek; 0; 2 / move pointer to end of file
	mov	r2,r0 / not required
	sys	write; zero; 16. / write accting info
	mov	r2,r0 / restore file descriptor
	sys	close / close file
2:
	rts	pc

ctty:	</dev/tty\0>
shell:	</bin/sh\0>
shellm:	<-\0>
tapx:	</dev/tapx\0>
rk0:	</dev/rk0\0>
utmp:	</tmp/utmp\0>
wtmp:	</tmp/wtmp\0>
ttyx:	</dev/ttyx\0>
getty:	</etc/getty\0>
usr:	</usr\0>
	.even

shellp:	shellm
	0
gettyp:	getty
	0
itab:
	'0; ..
	'1; ..
	'2; ..
	'3; ..
	'4; ..
	'5; ..
	'6; ..
	'7; ..
	0