Adaptec AHA-1520A Manual de Serviço descarregar pdf (Página 241)

100

101

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

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