Technical data

SunOS 5.5 Devices openprom(7D)
∗ Get the peer node of the given node. The root node is the peer of zero.
∗ After changing nodes, property lookups apply to that node. The driver
∗ ’remembers’ what node you are in.
∗/
static int
peer(int nodeid, int fd)
{
Oppbuf oppbuf;
struct openpromio ∗opp = &(oppbuf.opp);
int ∗ip = (int ∗)(opp->oprom_array);
(void) memset(oppbuf.buf, 0, BUFSZ);
opp->oprom_size = MAXVALSZ;
∗ip = nodeid;
if (ioctl(fd, OPROMNEXT, opp) < 0) {
perror("OPROMNEXT");
exit(1);
}
return (∗(int ∗)opp->oprom_array);
}
int
main(void)
{
Oppbuf oppbuf;
struct openpromio ∗opp = &(oppbuf.opp);
int fd;
if ((fd = open(promdev, O_RDONLY)) < 0) {
fprintf(stderr, "Cannot open openprom device0);
exit(1);
}
/∗
∗ Get and print the value of the root node ’name’ property
∗/
(void) peer(0, fd); /∗ Navigate to the root node ∗/
(void) memset(oppbuf.buf, 0, BUFSZ);
opp->oprom_size = MAXVALSZ;
(void) strcpy(opp->oprom_array, "name");
if (ioctl(fd, OPROMGETPROP, opp) < 0) {
perror("OPROMGETPROP");
exit(1);
modified 18 Aug 1995 7D-237