static int bus_get_uint64_property(sd_bus *bus, const char *path, const char *interface, const char *property, uint64_t *val) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(bus);
assert(path);
assert(interface);
assert(property);
assert(val);
r = sd_bus_get_property_trivial(
bus,
"org.freedesktop.systemd1",
path,
interface,
property,
&error,
't', val);
if (r < 0) {
log_error("Failed to parse reply: %s", bus_error_message(&error, -r));
return r;
}
return 0;
}
static usec_t get_startup_time(Context *c) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
usec_t t = 0;
int r;
assert(c);
r = sd_bus_get_property_trivial(
c->bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UserspaceTimestamp",
&error,
't', &t);
if (r < 0) {
log_error("Failed to get timestamp: %s", bus_error_message(&error, -r));
return 0;
}
return t;
}
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);
}
