pn_get_buf
error = pn_get_buf(fnamep, seg, &lookpn, namebuf, sizeof (namebuf));
error = pn_get_buf(path, UIO_SYSSPACE, &lookpn,
(void) pn_get_buf("dev", UIO_SYSSPACE, &pn, buf, sizeof (buf));
error = pn_get_buf(fnamep, seg, &lookpn, namebuf, sizeof (namebuf));
error = pn_get_buf(path, UIO_SYSSPACE, &pn, namebuf, sizeof (namebuf));
if ((error = pn_get_buf(str, seg, pnp, buf, MAXPATHLEN)) != 0)
extern int pn_get_buf(const char *, enum uio_seg, struct pathname *,