int main(int argc, char *argv[])
{
static const char *matchfmt =
"type='signal',"
"interface='org.freedesktop.DBus.Properties',"
"member='PropertiesChanged',"
"arg0='org.openbmc.control.Power',"
"path='%s',"
"sender='%s'";
static const char *usage =
"Usage: %s OBJECTPATH on|off\n";
static const size_t LEN = 256;
sd_bus *conn = NULL;
sd_event *loop = NULL;
sd_bus_slot *slot = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL;
char *service = NULL;
int r, dest = -1, state;
char match[LEN];
if(argc < 3) {
fprintf(stderr, usage, argv[0]);
exit(EXIT_FAILURE);
}
if(!strcmp(argv[2], "on"))
dest = 1;
if(!strcmp(argv[2], "off"))
dest = 0;
if(dest != 0 && dest != 1) {
fprintf(stderr, usage, argv[0]);
exit(EXIT_FAILURE);
}
r = sd_bus_default_system(&conn);
if(r < 0) {
fprintf(stderr, "Error connecting to system bus: %s\n",
strerror(-r));
goto finish;
}
r = mapper_get_service(conn, argv[1], &service);
if (r < 0) {
fprintf(stderr, "Error obtaining host service: %s\n",
strerror(-r));
goto finish;
}
r = sd_event_default(&loop);
if (r < 0) {
fprintf(stderr, "Error obtaining event loop: %s\n",
strerror(-r));
goto finish;
}
r = sd_bus_attach_event(conn, loop, SD_EVENT_PRIORITY_NORMAL);
if (r < 0) {
fprintf(stderr, "Failed to attach system "
"bus to event loop: %s\n",
strerror(-r));
goto finish;
}
if(strlen(matchfmt) + strnlen(argv[1], LEN) > LEN) {
r = -E2BIG;
fprintf(stderr, "Error adding match rule: %s\n",
strerror(-r));
goto finish;
}
sprintf(match, matchfmt, argv[1], service);
r = sd_bus_add_match(conn,
&slot,
match,
callback,
loop);
if(r < 0) {
fprintf(stderr, "Error adding match rule: %s\n",
strerror(-r));
goto finish;
}
r = sd_bus_get_property_trivial(conn,
service,
argv[1],
"org.openbmc.control.Power",
"pgood",
&error,
'i',
&state);
if(r < 0) {
fprintf(stderr, "Error getting property: %s\n",
strerror(-r));
goto finish;
}
if(dest == state)
goto finish;
r = sd_event_loop(loop);
if(r < 0) {
fprintf(stderr, "Error starting event loop: %s\n",
strerror(-r));
goto finish;
}
finish:
exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
}
//-------------------------------------------------------------------
// Gets called by PowerOff handler when a Soft Power off is requested
//-------------------------------------------------------------------
static int soft_power_off(sd_bus_message *m, void *userdata, sd_bus_error *ret_error)
{
int64_t bt_resp = -1;
int rc = 0;
char *bus_name = NULL;
// Steps to be taken when we get this.
// 1: Send a SMS_ATN to the Host
// 2: Host receives it and sends a GetMsgFlags IPMI command
// 3: IPMID app handler will respond to that with a MSgFlag with bit:0x2
// set indicating we have a message for Host
// 4: Host sends a GetMsgBuffer command and app handler will respond to
// that with a OEM-SEL with certain fields packed indicating to the
// host that it do a shutdown of the partitions.
// 5: Host does the partition shutdown and calls Chassis Power off command
// 6: App handler handles the command by making a call to ChassisManager
// Dbus
// Now the job is to send the SMS_ATTN.
// Req message contains the specifics about which method etc that we want to
// access on which bus, object
sd_bus_message *response = NULL;
// Error return mechanism
sd_bus_error bus_error = SD_BUS_ERROR_NULL;
// Gets a hook onto either a SYSTEM or SESSION bus
sd_bus *bus = ipmid_get_sd_bus_connection();
rc = mapper_get_service(bus, object_name, &bus_name);
if (rc < 0) {
fprintf(stderr, "Failed to get %s bus name: %s\n",
object_name, strerror(-rc));
goto finish;
}
rc = sd_bus_call_method(bus, // In the System Bus
bus_name, // Service to contact
object_name, // Object path
intf_name, // Interface name
"setAttention", // Method to be called
&bus_error, // object to return error
&response, // Response buffer if any
NULL); // No input arguments
if(rc < 0)
{
fprintf(stderr,"ERROR initiating Power Off:[%s]\n",bus_error.message);
goto finish;
}
// See if we were able to successfully raise SMS_ATN
rc = sd_bus_message_read(response, "x", &bt_resp);
if (rc < 0)
{
fprintf(stderr, "Failed to get a rc from BT for SMS_ATN: %s\n", strerror(-rc));
goto finish;
}
finish:
sd_bus_error_free(&bus_error);
response = sd_bus_message_unref(response);
free(bus_name);
if(rc < 0)
{
return sd_bus_reply_method_return(m, "x", rc);
}
else
{
return sd_bus_reply_method_return(m, "x", bt_resp);
}
}
