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#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <systemd/sd-bus.h>
#define _cleanup_(f) __attribute__((cleanup(f)))
typedef struct object {
char *name;
uint32_t number;
} object;
static int method(sd_bus_message *m, void *userdata, sd_bus_error *error) {
printf("Got called with userdata=%p\n", userdata);
return 1;
}
static const sd_bus_vtable vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD(
"Method1", "s", "s", method, 0),
SD_BUS_METHOD_WITH_NAMES_OFFSET(
"Method2",
"so", SD_BUS_PARAM(string) SD_BUS_PARAM(path),
"s", SD_BUS_PARAM(returnstring),
method, offsetof(object, number),
SD_BUS_VTABLE_DEPRECATED),
SD_BUS_WRITABLE_PROPERTY(
"AutomaticStringProperty", "s", NULL, NULL,
offsetof(object, name),
SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_WRITABLE_PROPERTY(
"AutomaticIntegerProperty", "u", NULL, NULL,
offsetof(object, number),
SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
SD_BUS_VTABLE_END
};
#define check(x) ({ \
int r = x; \
errno = r < 0 ? -r : 0; \
printf(#x ": %m\n"); \
if (r < 0) \
return EXIT_FAILURE; \
})
int main(int argc, char **argv) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
sd_bus_default(&bus);
object object = { .number = 666 };
check((object.name = strdup("name")) != NULL);
check(sd_bus_add_object_vtable(bus, NULL, "/object",
"org.freedesktop.systemd.VtableExample",
vtable,
&object));
for (;;) {
check(sd_bus_wait(bus, UINT64_MAX));
check(sd_bus_process(bus, NULL));
}
free(object.name);
return 0;
}
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