ttymsg
if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL)
const char *ttymsg(struct iovec *, int, const char *, int);
if ((p = ttymsg(&iov, 1, utmp->ut_line, 60*5)) != NULL)
if ((p = ttymsg(iov, iovlen, ut->ut_line,
return (ttymsg(iov, iovcnt, line, tmout));
ttymsg(iov, iovcnt, line, tmout)
line = ttymsg(iov, iovcnt, line, tmout);