/ access(file, request)/  test ability to access file in all indicated ways/  1 - read/  2 - write/  4 - execute.globl	_access.globl	csv, cret.comm	_errno,2.access = 33._access:	jsr	r5,csv	mov	4(r5),0f+2	mov	6(r5),0f+4	clr	r0	sys	0; 0f.data0:	sys	.access; ..; ...text	bec	1f	mov	r0,_errno	mov	$-1,r01:	jmp	cret