static int driver_get_id(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
sd_id128_t server_id;
char buf[SD_ID128_STRING_MAX];
int r;
r = sd_bus_get_server_id(bus, &server_id);
if (r < 0)
return r;
return sd_bus_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
}
int main(int argc, char *argv[]) {
_cleanup_bus_unref_ sd_bus *a = NULL, *b = NULL;
sd_id128_t server_id;
bool is_unix;
int r;
if (argc > 1) {
log_error("This program takes no argument.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
log_parse_environment();
log_open();
is_unix =
sd_is_socket(STDIN_FILENO, AF_UNIX, 0, 0) > 0 &&
sd_is_socket(STDOUT_FILENO, AF_UNIX, 0, 0) > 0;
r = sd_bus_new(&a);
if (r < 0) {
log_error("Failed to allocate bus: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_address(a, "unix:path=/run/dbus/system_bus_socket");
if (r < 0) {
log_error("Failed to set address to connect to: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_negotiate_fds(a, is_unix);
if (r < 0) {
log_error("Failed to set FD negotiation: %s", strerror(-r));
goto finish;
}
r = sd_bus_start(a);
if (r < 0) {
log_error("Failed to start bus client: %s", strerror(-r));
goto finish;
}
r = sd_bus_get_server_id(a, &server_id);
if (r < 0) {
log_error("Failed to get server ID: %s", strerror(-r));
goto finish;
}
r = sd_bus_new(&b);
if (r < 0) {
log_error("Failed to allocate bus: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_fd(b, STDIN_FILENO, STDOUT_FILENO);
if (r < 0) {
log_error("Failed to set fds: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_server(b, 1, server_id);
if (r < 0) {
log_error("Failed to set server mode: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_negotiate_fds(b, is_unix);
if (r < 0) {
log_error("Failed to set FD negotiation: %s", strerror(-r));
goto finish;
}
r = sd_bus_set_anonymous(b, true);
if (r < 0) {
log_error("Failed to set anonymous authentication: %s", strerror(-r));
goto finish;
}
r = sd_bus_start(b);
if (r < 0) {
log_error("Failed to start bus client: %s", strerror(-r));
goto finish;
}
for (;;) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int events_a, events_b, fd;
uint64_t timeout_a, timeout_b, t;
struct timespec _ts, *ts;
r = sd_bus_process(a, &m);
if (r < 0) {
log_error("Failed to process bus: %s", strerror(-r));
goto finish;
}
if (m) {
r = sd_bus_send(b, m, NULL);
if (r < 0) {
log_error("Failed to send message: %s", strerror(-r));
goto finish;
}
}
if (r > 0)
continue;
r = sd_bus_process(b, &m);
if (r < 0) {
log_error("Failed to process bus: %s", strerror(-r));
goto finish;
}
if (m) {
r = sd_bus_send(a, m, NULL);
if (r < 0) {
log_error("Failed to send message: %s", strerror(-r));
goto finish;
}
}
if (r > 0)
continue;
fd = sd_bus_get_fd(a);
if (fd < 0) {
log_error("Failed to get fd: %s", strerror(-r));
goto finish;
}
events_a = sd_bus_get_events(a);
if (events_a < 0) {
log_error("Failed to get events mask: %s", strerror(-r));
goto finish;
}
r = sd_bus_get_timeout(a, &timeout_a);
if (r < 0) {
log_error("Failed to get timeout: %s", strerror(-r));
goto finish;
}
events_b = sd_bus_get_events(b);
if (events_b < 0) {
log_error("Failed to get events mask: %s", strerror(-r));
goto finish;
}
r = sd_bus_get_timeout(b, &timeout_b);
if (r < 0) {
log_error("Failed to get timeout: %s", strerror(-r));
goto finish;
}
t = timeout_a;
if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a))
t = timeout_b;
if (t == (uint64_t) -1)
ts = NULL;
else {
usec_t nw;
nw = now(CLOCK_MONOTONIC);
if (t > nw)
t -= nw;
else
t = 0;
ts = timespec_store(&_ts, t);
}
{
struct pollfd p[3] = {
{.fd = fd, .events = events_a, },
{.fd = STDIN_FILENO, .events = events_b & POLLIN, },
{.fd = STDOUT_FILENO, .events = events_b & POLLOUT, }};
