static int client(struct context *c) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
_cleanup_bus_unref_ sd_bus *bus = NULL;
sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert_se(sd_bus_new(&bus) >= 0);
assert_se(sd_bus_set_fd(bus, c->fds[1], c->fds[1]) >= 0);
assert_se(sd_bus_negotiate_fds(bus, c->client_negotiate_unix_fds) >= 0);
assert_se(sd_bus_set_anonymous(bus, c->client_anonymous_auth) >= 0);
assert_se(sd_bus_start(bus) >= 0);
r = sd_bus_message_new_method_call(
bus,
&m,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"Exit");
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
return r;
}
r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
return r;
}
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_(sd_bus_unrefp) sd_bus *a = NULL, *b = NULL;
sd_id128_t server_id;
bool is_unix;
int r, in_fd, out_fd;
log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
r = sd_listen_fds(0);
if (r == 0) {
in_fd = STDIN_FILENO;
out_fd = STDOUT_FILENO;
} else if (r == 1) {
in_fd = SD_LISTEN_FDS_START;
out_fd = SD_LISTEN_FDS_START;
} else {
log_error("Illegal number of file descriptors passed\n");
goto finish;
}
is_unix =
sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 &&
sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0;
r = sd_bus_new(&a);
if (r < 0) {
log_error_errno(r, "Failed to allocate bus: %m");
goto finish;
}
r = sd_bus_set_address(a, arg_bus_path);
if (r < 0) {
log_error_errno(r, "Failed to set address to connect to: %m");
goto finish;
}
r = sd_bus_negotiate_fds(a, is_unix);
if (r < 0) {
log_error_errno(r, "Failed to set FD negotiation: %m");
goto finish;
}
r = sd_bus_start(a);
if (r < 0) {
log_error_errno(r, "Failed to start bus client: %m");
goto finish;
}
r = sd_bus_get_bus_id(a, &server_id);
if (r < 0) {
log_error_errno(r, "Failed to get server ID: %m");
goto finish;
}
r = sd_bus_new(&b);
if (r < 0) {
log_error_errno(r, "Failed to allocate bus: %m");
goto finish;
}
r = sd_bus_set_fd(b, in_fd, out_fd);
if (r < 0) {
log_error_errno(r, "Failed to set fds: %m");
goto finish;
}
r = sd_bus_set_server(b, 1, server_id);
if (r < 0) {
log_error_errno(r, "Failed to set server mode: %m");
goto finish;
}
r = sd_bus_negotiate_fds(b, is_unix);
if (r < 0) {
log_error_errno(r, "Failed to set FD negotiation: %m");
goto finish;
}
r = sd_bus_set_anonymous(b, true);
if (r < 0) {
log_error_errno(r, "Failed to set anonymous authentication: %m");
goto finish;
}
r = sd_bus_start(b);
if (r < 0) {
log_error_errno(r, "Failed to start bus client: %m");
goto finish;
}
for (;;) {
_cleanup_(sd_bus_message_unrefp)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_errno(r, "Failed to process bus a: %m");
goto finish;
}
if (m) {
r = sd_bus_send(b, m, NULL);
if (r < 0) {
log_error_errno(r, "Failed to send message: %m");
goto finish;
}
}
if (r > 0)
continue;
r = sd_bus_process(b, &m);
if (r < 0) {
/* treat 'connection reset by peer' as clean exit condition */
if (r == -ECONNRESET)
r = 0;
goto finish;
}
if (m) {
r = sd_bus_send(a, m, NULL);
if (r < 0) {
log_error_errno(r, "Failed to send message: %m");
goto finish;
}
}
if (r > 0)
continue;
fd = sd_bus_get_fd(a);
if (fd < 0) {
log_error_errno(r, "Failed to get fd: %m");
goto finish;
}
events_a = sd_bus_get_events(a);
if (events_a < 0) {
log_error_errno(r, "Failed to get events mask: %m");
goto finish;
}
r = sd_bus_get_timeout(a, &timeout_a);
if (r < 0) {
log_error_errno(r, "Failed to get timeout: %m");
goto finish;
}
events_b = sd_bus_get_events(b);
if (events_b < 0) {
log_error_errno(r, "Failed to get events mask: %m");
goto finish;
}
r = sd_bus_get_timeout(b, &timeout_b);
if (r < 0) {
log_error_errno(r, "Failed to get timeout: %m");
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, }};
static void *server(void *p) {
struct context *c = p;
sd_bus *bus = NULL;
sd_id128_t id;
bool quit = false;
int r;
assert_se(sd_id128_randomize(&id) >= 0);
assert_se(sd_bus_new(&bus) >= 0);
assert_se(sd_bus_set_fd(bus, c->fds[0], c->fds[0]) >= 0);
assert_se(sd_bus_set_server(bus, 1, id) >= 0);
assert_se(sd_bus_set_anonymous(bus, c->server_anonymous_auth) >= 0);
assert_se(sd_bus_negotiate_fds(bus, c->server_negotiate_unix_fds) >= 0);
assert_se(sd_bus_start(bus) >= 0);
while (!quit) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
r = sd_bus_process(bus, &m);
if (r < 0) {
log_error("Failed to process requests: %s", strerror(-r));
goto fail;
}
if (r == 0) {
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
log_error("Failed to wait: %s", strerror(-r));
goto fail;
}
continue;
}
if (!m)
continue;
log_info("Got message! member=%s", strna(sd_bus_message_get_member(m)));
if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Exit")) {
assert_se((sd_bus_can_send(bus, 'h') >= 1) == (c->server_negotiate_unix_fds && c->client_negotiate_unix_fds));
r = sd_bus_message_new_method_return(m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
quit = true;
} else if (sd_bus_message_is_method_call(m, NULL, NULL)) {
r = sd_bus_message_new_method_error(
m,
&reply,
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method."));
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
}
if (reply) {
r = sd_bus_send(bus, reply, NULL);
if (r < 0) {
log_error("Failed to send reply: %s", strerror(-r));
goto fail;
}
}
}
r = 0;
fail:
if (bus) {
sd_bus_flush(bus);
sd_bus_unref(bus);
}
return INT_TO_PTR(r);
}
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, }};
