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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <systemd/sd-bus.h>
static int method_echo(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
char *str;
const char *intf = sd_bus_message_get_interface(m),
*path = sd_bus_message_get_path(m);
sd_bus *bus = sd_bus_message_get_bus(m);
char response[512] = {0};
int r;
/* Read the parameters */
r = sd_bus_message_read(m, "s", &str);
if (r < 0) {
fprintf(stderr, "Failed to parse parameters: %s\n", strerror(-r));
return r;
}
r = sd_bus_emit_signal(bus, path, intf, "MethodInvoked", "ss",
"Echo method was invoked", path);
if (r < 0) {
fprintf(stderr, "Failed to emit signal: %s\n", strerror(-r));
return r;
}
strncat(response, path, 128);
strcat(response, " says ");
strncat(response, str, 128);
/* Reply with the response */
return sd_bus_reply_method_return(m, "s", &response);
}
static const sd_bus_vtable echo_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD("Echo", "s", "s", method_echo, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_SIGNAL("MethodInvoked", "s", 0),
SD_BUS_VTABLE_END
};
int main(int argc, char *argv[]) {
sd_bus_slot *slot = NULL;
sd_bus *bus = NULL;
int r;
char **acquired = NULL, **activatable = NULL, **i;
/* Connect to the user bus this time */
r = sd_bus_open_system(&bus);
if (r < 0) {
fprintf(stderr, "Failed to connect to system bus: %s\n", strerror(-r));
goto finish;
}
/* Install an object */
r = sd_bus_add_object_vtable(bus,
&slot,
"/org/openbmc/examples/path0/SDBusObj", /* object path */
"org.openbmc.examples.Echo", /* interface name */
echo_vtable,
NULL);
if (r < 0) {
fprintf(stderr, "Failed to issue method call: %s\n", strerror(-r));
goto finish;
}
/* Install an object */
r = sd_bus_add_object_vtable(bus,
&slot,
"/org/openbmc/examples/path1/SDBusObj", /* object path */
"org.openbmc.examples.Echo", /* interface name */
echo_vtable,
NULL);
if (r < 0) {
fprintf(stderr, "Failed to issue method call: %s\n", strerror(-r));
goto finish;
}
/* Take a well-known service name so that clients can find us */
r = sd_bus_request_name(bus, "org.openbmc.examples.SDBusService", 0);
if (r < 0) {
fprintf(stderr, "Failed to acquire service name: %s\n", strerror(-r));
goto finish;
}
for (;;) {
/* Process requests */
r = sd_bus_process(bus, NULL);
if (r < 0) {
fprintf(stderr, "Failed to process bus: %s\n", strerror(-r));
goto finish;
}
if (r > 0) /* we processed a request, try to process another one, right-away */
continue;
/* Wait for the next request to process */
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
fprintf(stderr, "Failed to wait on bus: %s\n", strerror(-r));
goto finish;
}
}
finish:
sd_bus_slot_unref(slot);
sd_bus_unref(bus);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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