free(n);
}
+static void bus_reset_queues(sd_bus *b) {
+ unsigned i;
+
+ assert(b);
+
+ for (i = 0; i < b->rqueue_size; i++)
+ sd_bus_message_unref(b->rqueue[i]);
+ free(b->rqueue);
+
+ for (i = 0; i < b->wqueue_size; i++)
+ sd_bus_message_unref(b->wqueue[i]);
+ free(b->wqueue);
+
+ b->rqueue = b->wqueue = NULL;
+ b->rqueue_size = b->wqueue_size = 0;
+}
+
static void bus_free(sd_bus *b) {
struct filter_callback *f;
struct node *n;
- unsigned i;
assert(b);
close_many(b->fds, b->n_fds);
free(b->fds);
- for (i = 0; i < b->rqueue_size; i++)
- sd_bus_message_unref(b->rqueue[i]);
- free(b->rqueue);
-
- for (i = 0; i < b->wqueue_size; i++)
- sd_bus_message_unref(b->wqueue[i]);
- free(b->wqueue);
+ bus_reset_queues(b);
hashmap_free_free(b->reply_callbacks);
prioq_free(b->reply_callbacks_prioq);
return 0;
}
+_public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_TIMESTAMP, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CREDS, b);
+ return 0;
+}
+
_public_ int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) {
assert_return(bus, -EINVAL);
assert_return(bus->state == BUS_UNSET, -EPERM);
return 0;
}
-static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) {
+static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) {
const char *s;
int r;
assert(bus);
- assert(bus->state == BUS_HELLO);
+ assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING);
assert(reply);
r = sd_bus_message_get_errno(reply);
if (!bus->unique_name)
return -ENOMEM;
- bus->state = BUS_RUNNING;
+ if (bus->state == BUS_HELLO)
+ bus->state = BUS_RUNNING;
return 1;
}
}
_public_ void sd_bus_close(sd_bus *bus) {
+
if (!bus)
return;
if (bus->state == BUS_CLOSED)
sd_bus_detach_event(bus);
+ /* Drop all queued messages so that they drop references to
+ * the bus object and the bus may be freed */
+ bus_reset_queues(bus);
+
if (!bus->is_kernel)
bus_close_fds(bus);
* freed. */
}
+static void bus_enter_closing(sd_bus *bus) {
+ assert(bus);
+
+ if (bus->state != BUS_OPENING &&
+ bus->state != BUS_AUTHENTICATING &&
+ bus->state != BUS_HELLO &&
+ bus->state != BUS_RUNNING)
+ return;
+
+ bus->state = BUS_CLOSING;
+}
+
_public_ sd_bus *sd_bus_ref(sd_bus *bus) {
assert_return(bus, NULL);
if (m->header->version > b->message_version)
return -EPERM;
- if (m->sealed)
+ if (m->sealed) {
+ /* If we copy the same message to multiple
+ * destinations, avoid using the same serial
+ * numbers. */
+ b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m));
return 0;
+ }
return bus_message_seal(m, ++b->serial);
}
+static int bus_write_message(sd_bus *bus, sd_bus_message *message, size_t *idx) {
+ int r;
+
+ assert(bus);
+ assert(message);
+
+ if (bus->is_kernel)
+ r = bus_kernel_write_message(bus, message);
+ else
+ r = bus_socket_write_message(bus, message, idx);
+
+ return r;
+}
+
static int dispatch_wqueue(sd_bus *bus) {
int r, ret = 0;
while (bus->wqueue_size > 0) {
- if (bus->is_kernel)
- r = bus_kernel_write_message(bus, bus->wqueue[0]);
- else
- r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex);
-
- if (r < 0) {
- sd_bus_close(bus);
+ r = bus_write_message(bus, bus->wqueue[0], &bus->windex);
+ if (r < 0)
return r;
- } else if (r == 0)
+ else if (r == 0)
/* Didn't do anything this time */
return ret;
else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) {
return ret;
}
+static int bus_read_message(sd_bus *bus, sd_bus_message **m) {
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ if (bus->is_kernel)
+ r = bus_kernel_read_message(bus, m);
+ else
+ r = bus_socket_read_message(bus, m);
+
+ return r;
+}
+
static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
sd_bus_message *z = NULL;
int r, ret = 0;
/* Try to read a new message */
do {
- if (bus->is_kernel)
- r = bus_kernel_read_message(bus, &z);
- else
- r = bus_socket_read_message(bus, &z);
-
- if (r < 0) {
- sd_bus_close(bus);
+ r = bus_read_message(bus, &z);
+ if (r < 0)
return r;
- }
if (r == 0)
return ret;
if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) {
size_t idx = 0;
- if (bus->is_kernel)
- r = bus_kernel_write_message(bus, m);
- else
- r = bus_socket_write_message(bus, m, &idx);
-
- if (r < 0) {
- sd_bus_close(bus);
+ r = bus_write_message(bus, m, &idx);
+ if (r < 0)
return r;
- } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
+ else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
/* Wasn't fully written. So let's remember how
* much was written. Note that the first entry
* of the wqueue array is always allocated so
return 1;
}
+_public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *serial) {
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (!streq_ptr(m->destination, destination)) {
+
+ if (!destination)
+ return -EEXIST;
+
+ r = sd_bus_message_set_destination(m, destination);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_send(bus, m, serial);
+}
+
static usec_t calc_elapse(uint64_t usec) {
if (usec == (uint64_t) -1)
return 0;
assert(bus);
- if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED)
+ if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING)
return -ENOTCONN;
if (bus->state == BUS_RUNNING)
return 1;
room = true;
}
- if (bus->is_kernel)
- r = bus_kernel_read_message(bus, &incoming);
- else
- r = bus_socket_read_message(bus, &incoming);
+ r = bus_read_message(bus, &incoming);
if (r < 0)
return r;
+
if (incoming) {
if (incoming->reply_serial == serial) {
sd_bus_message_unref(incoming);
return -EIO;
+
+ } else if (incoming->header->serial == serial &&
+ bus->unique_name &&
+ incoming->sender &&
+ streq(bus->unique_name, incoming->sender)) {
+
+ /* Our own message? Somebody is trying
+ * to send its own client a message,
+ * let's not dead-lock, let's fail
+ * immediately. */
+
+ sd_bus_message_unref(incoming);
+ return -ELOOP;
}
/* There's already guaranteed to be room for
_public_ int sd_bus_get_fd(sd_bus *bus) {
assert_return(bus, -EINVAL);
- assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(bus->input_fd == bus->output_fd, -EPERM);
assert_return(!bus_pid_changed(bus), -ECHILD);
int flags = 0;
assert_return(bus, -EINVAL);
- assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->state == BUS_OPENING)
assert_return(bus, -EINVAL);
assert_return(timeout_usec, -EINVAL);
- assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
+ if (bus->state == BUS_CLOSING) {
+ *timeout_usec = 0;
+ return 1;
+ }
+
if (bus->state == BUS_AUTHENTICATING) {
*timeout_usec = bus->auth_timeout;
return 1;
}
static int process_timeout(sd_bus *bus) {
+ _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message* m = NULL;
struct reply_callback *c;
usec_t n;
r = bus_message_new_synthetic_error(
bus,
c->serial,
- &SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
&m);
if (r < 0)
return r;
+ r = bus_seal_message(bus, m);
+ if (r < 0)
+ return r;
+
assert_se(prioq_pop(bus->reply_callbacks_prioq) == c);
hashmap_remove(bus->reply_callbacks, &c->serial);
- r = c->callback(bus, m, c->userdata);
+ bus->current = m;
+ bus->iteration_counter ++;
+
+ r = c->callback(bus, m, c->userdata, &error_buffer);
+ r = bus_maybe_reply_error(m, r, &error_buffer);
free(c);
- return r < 0 ? r : 1;
+ bus->current = NULL;
+
+ return r;
}
static int process_hello(sd_bus *bus, sd_bus_message *m) {
}
static int process_reply(sd_bus *bus, sd_bus_message *m) {
+ _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
struct reply_callback *c;
int r;
if (r < 0)
return r;
- r = c->callback(bus, m, c->userdata);
+ r = c->callback(bus, m, c->userdata, &error_buffer);
+ r = bus_maybe_reply_error(m, r, &error_buffer);
free(c);
return r;
}
static int process_filter(sd_bus *bus, sd_bus_message *m) {
+ _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
struct filter_callback *l;
int r;
if (r < 0)
return r;
- r = l->callback(bus, m, l->userdata);
+ r = l->callback(bus, m, l->userdata, &error_buffer);
+ r = bus_maybe_reply_error(m, r, &error_buffer);
if (r != 0)
return r;
return 1;
if (streq_ptr(m->member, "Ping"))
- r = sd_bus_message_new_method_return(bus, m, &reply);
+ r = sd_bus_message_new_method_return(m, &reply);
else if (streq_ptr(m->member, "GetMachineId")) {
sd_id128_t id;
char sid[33];
if (r < 0)
return r;
- r = sd_bus_message_new_method_return(bus, m, &reply);
+ r = sd_bus_message_new_method_return(m, &reply);
if (r < 0)
return r;
r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid));
} else {
r = sd_bus_message_new_method_errorf(
- bus, m, &reply,
+ m, &reply,
SD_BUS_ERROR_UNKNOWN_METHOD,
"Unknown method '%s' on interface '%s'.", m->member, m->interface);
}
if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) {
r = sd_bus_reply_method_errorf(
- bus, m,
+ m,
SD_BUS_ERROR_UNKNOWN_OBJECT,
"Unknown object '%s'.", m->path);
if (r < 0)
return r;
}
+static int process_closing(sd_bus *bus, sd_bus_message **ret) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ struct reply_callback *c;
+ int r;
+
+ assert(bus);
+ assert(bus->state == BUS_CLOSING);
+
+ c = hashmap_first(bus->reply_callbacks);
+ if (c) {
+ _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
+
+ /* First, fail all outstanding method calls */
+ r = bus_message_new_synthetic_error(
+ bus,
+ c->serial,
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"),
+ &m);
+ if (r < 0)
+ return r;
+
+ r = bus_seal_message(bus, m);
+ if (r < 0)
+ return r;
+
+ if (c->timeout != 0)
+ prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx);
+
+ hashmap_remove(bus->reply_callbacks, &c->serial);
+
+ bus->current = m;
+ bus->iteration_counter++;
+
+ r = c->callback(bus, m, c->userdata, &error_buffer);
+ r = bus_maybe_reply_error(m, r, &error_buffer);
+ free(c);
+
+ goto finish;
+ }
+
+ /* Then, synthesize a Disconnected message */
+ r = sd_bus_message_new_signal(
+ bus,
+ "/org/freedesktop/DBus/Local",
+ "org.freedesktop.DBus.Local",
+ "Disconnected",
+ &m);
+ if (r < 0)
+ return r;
+
+ r = bus_seal_message(bus, m);
+ if (r < 0)
+ return r;
+
+ sd_bus_close(bus);
+
+ bus->current = m;
+ bus->iteration_counter++;
+
+ r = process_filter(bus, m);
+ if (r != 0)
+ goto finish;
+
+ r = process_match(bus, m);
+ if (r != 0)
+ goto finish;
+
+ if (ret) {
+ *ret = m;
+ m = NULL;
+ }
+
+ r = 1;
+
+finish:
+ bus->current = NULL;
+ return r;
+}
+
_public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
BUS_DONT_DESTROY(bus);
int r;
assert_return(!bus_pid_changed(bus), -ECHILD);
/* We don't allow recursively invoking sd_bus_process(). */
- assert_return(!bus->processing, -EBUSY);
+ assert_return(!bus->current, -EBUSY);
switch (bus->state) {
case BUS_OPENING:
r = bus_socket_process_opening(bus);
- if (r < 0)
+ if (r == -ECONNRESET || r == -EPIPE) {
+ bus_enter_closing(bus);
+ r = 1;
+ } else if (r < 0)
return r;
if (ret)
*ret = NULL;
return r;
case BUS_AUTHENTICATING:
-
r = bus_socket_process_authenticating(bus);
- if (r < 0)
+ if (r == -ECONNRESET || r == -EPIPE) {
+ bus_enter_closing(bus);
+ r = 1;
+ } else if (r < 0)
return r;
+
if (ret)
*ret = NULL;
+
return r;
case BUS_RUNNING:
case BUS_HELLO:
-
- bus->processing = true;
r = process_running(bus, ret);
- bus->processing = false;
+ if (r == -ECONNRESET || r == -EPIPE) {
+ bus_enter_closing(bus);
+ r = 1;
+
+ if (ret)
+ *ret = NULL;
+ }
return r;
+
+ case BUS_CLOSING:
+ return process_closing(bus, ret);
}
assert_not_reached("Unknown state");
usec_t m = (usec_t) -1;
assert(bus);
+
+ if (bus->state == BUS_CLOSING)
+ return 1;
+
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
e = sd_bus_get_events(bus);
_public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
assert_return(bus, -EINVAL);
- assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
+ if (bus->state == BUS_CLOSING)
+ return 0;
+
+ assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN);
+
if (bus->rqueue_size > 0)
return 0;
int r;
assert_return(bus, -EINVAL);
- assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
+ if (bus->state == BUS_CLOSING)
+ return 0;
+
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+
r = bus_ensure_running(bus);
if (r < 0)
return r;
}
static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- void *bus = userdata;
+ sd_bus *bus = userdata;
int r;
assert(bus);
}
static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
- void *bus = userdata;
+ sd_bus *bus = userdata;
int r;
assert(bus);
int r;
assert_return(bus, -EINVAL);
- assert_return(event, -EINVAL);
assert_return(!bus->event, -EBUSY);
assert(!bus->input_io_event_source);
assert(!bus->output_io_event_source);
assert(!bus->time_event_source);
- bus->event = sd_event_ref(event);
+ if (event)
+ bus->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&bus->event);
+ if (r < 0)
+ return r;
+ }
- r = sd_event_add_io(event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source);
+ r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source);
if (r < 0)
goto fail;
goto fail;
if (bus->output_fd != bus->input_fd) {
- r = sd_event_add_io(event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source);
+ r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = sd_event_add_monotonic(event, 0, 0, time_callback, bus, &bus->time_event_source);
+ r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = sd_event_add_quit(event, quit_callback, bus, &bus->quit_event_source);
+ r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source);
if (r < 0)
goto fail;
assert_return(bus, -EINVAL);
assert_return(bus->event, -ENXIO);
- if (bus->input_io_event_source)
+ if (bus->input_io_event_source) {
+ sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF);
bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source);
+ }
- if (bus->output_io_event_source)
+ if (bus->output_io_event_source) {
+ sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF);
bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source);
+ }
- if (bus->time_event_source)
+ if (bus->time_event_source) {
+ sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF);
bus->time_event_source = sd_event_source_unref(bus->time_event_source);
+ }
- if (bus->quit_event_source)
+ if (bus->quit_event_source) {
+ sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF);
bus->quit_event_source = sd_event_source_unref(bus->quit_event_source);
+ }
if (bus->event)
bus->event = sd_event_unref(bus->event);
return 0;
}
-sd_bus_message* sd_bus_get_current(sd_bus *bus) {
+_public_ sd_event* sd_bus_get_event(sd_bus *bus) {
+ assert_return(bus, NULL);
+
+ return bus->event;
+}
+
+_public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) {
assert_return(bus, NULL);
return bus->current;
}
+
+static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) {
+ sd_bus *b = NULL;
+ int r;
+
+ assert(bus_open);
+ assert(default_bus);
+
+ if (!ret)
+ return !!*default_bus;
+
+ if (*default_bus) {
+ *ret = sd_bus_ref(*default_bus);
+ return 0;
+ }
+
+ r = bus_open(&b);
+ if (r < 0)
+ return r;
+
+ b->default_bus_ptr = default_bus;
+ b->tid = gettid();
+ *default_bus = b;
+
+ *ret = b;
+ return 1;
+}
+
+_public_ int sd_bus_default_system(sd_bus **ret) {
+ static __thread sd_bus *default_system_bus = NULL;
+
+ return bus_default(sd_bus_open_system, &default_system_bus, ret);
+}
+
+_public_ int sd_bus_default_user(sd_bus **ret) {
+ static __thread sd_bus *default_user_bus = NULL;
+
+ return bus_default(sd_bus_open_user, &default_user_bus, ret);
+}
+
+_public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) {
+ assert_return(b, -EINVAL);
+ assert_return(tid, -EINVAL);
+ assert_return(!bus_pid_changed(b), -ECHILD);
+
+ if (b->tid != 0) {
+ *tid = b->tid;
+ return 0;
+ }
+
+ if (b->event)
+ return sd_event_get_tid(b->event, tid);
+
+ return -ENXIO;
+}
+
+_public_ char *sd_bus_label_escape(const char *s) {
+ char *r, *t;
+ const char *f;
+
+ assert_return(s, NULL);
+
+ /* Escapes all chars that D-Bus' object path cannot deal
+ * with. Can be reversed with bus_path_unescape(). We special
+ * case the empty string. */
+
+ if (*s == 0)
+ return strdup("_");
+
+ r = new(char, strlen(s)*3 + 1);
+ if (!r)
+ return NULL;
+
+ for (f = s, t = r; *f; f++) {
+
+ /* Escape everything that is not a-zA-Z0-9. We also
+ * escape 0-9 if it's the first character */
+
+ if (!(*f >= 'A' && *f <= 'Z') &&
+ !(*f >= 'a' && *f <= 'z') &&
+ !(f > s && *f >= '0' && *f <= '9')) {
+ *(t++) = '_';
+ *(t++) = hexchar(*f >> 4);
+ *(t++) = hexchar(*f);
+ } else
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return r;
+}
+
+_public_ char *sd_bus_label_unescape(const char *f) {
+ char *r, *t;
+
+ assert_return(f, NULL);
+
+ /* Special case for the empty string */
+ if (streq(f, "_"))
+ return strdup("");
+
+ r = new(char, strlen(f) + 1);
+ if (!r)
+ return NULL;
+
+ for (t = r; *f; f++) {
+
+ if (*f == '_') {
+ int a, b;
+
+ if ((a = unhexchar(f[1])) < 0 ||
+ (b = unhexchar(f[2])) < 0) {
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '_';
+ } else {
+ *(t++) = (char) ((a << 4) | b);
+ f += 2;
+ }
+ } else
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return r;
+}
~ianmdlvl / elogind.git / blobdiff