#include "set.h"
#include "missing.h"
#include "def.h"
+#include "cgroup-util.h"
+#include "bus-label.h"
#include "sd-bus.h"
#include "bus-internal.h"
}
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]);
+ while (b->rqueue_size > 0)
+ sd_bus_message_unref(b->rqueue[--b->rqueue_size]);
+
free(b->rqueue);
+ b->rqueue = NULL;
+ b->rqueue_allocated = 0;
- for (i = 0; i < b->wqueue_size; i++)
- sd_bus_message_unref(b->wqueue[i]);
- free(b->wqueue);
+ while (b->wqueue_size > 0)
+ sd_bus_message_unref(b->wqueue[--b->wqueue_size]);
- b->rqueue = b->wqueue = NULL;
- b->rqueue_allocated = b->wqueue_allocated = 0;
- b->rqueue_size = b->wqueue_size = 0;
+ free(b->wqueue);
+ b->wqueue = NULL;
+ b->wqueue_allocated = 0;
}
static void bus_free(sd_bus *b) {
sd_bus_detach_event(b);
+ if (b->default_bus_ptr)
+ *b->default_bus_ptr = NULL;
+
bus_close_fds(b);
if (b->kdbus_buffer)
free(b->machine);
free(b->fake_label);
free(b->cgroup_root);
+ free(b->connection_name);
free(b->exec_path);
strv_free(b->exec_argv);
return 0;
}
+_public_ int sd_bus_set_name(sd_bus *bus, const char *name) {
+ char *n;
+
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ n = strdup(name);
+ if (!n)
+ return -ENOMEM;
+
+ free(bus->connection_name);
+ bus->connection_name = n;
+
+ return 0;
+}
+
static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) {
const char *s;
int r;
r = sd_bus_message_new_method_call(
bus,
+ &m,
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
- "Hello",
- &m);
+ "Hello");
if (r < 0)
return r;
b->sockaddr.un.sun_family = AF_UNIX;
strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1;
+ b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket");
return 0;
}
return bus_send_hello(bus);
}
+_public_ int sd_bus_open(sd_bus **ret) {
+ const char *e;
+ sd_bus *b;
+ int r;
+
+ assert_return(ret, -EINVAL);
+
+ /* Let's connect to the starter bus if it is set, and
+ * otherwise to the bus that is appropropriate for the scope
+ * we are running in */
+
+ e = secure_getenv("DBUS_STARTER_BUS_TYPE");
+ if (e) {
+ if (streq(e, "system"))
+ return sd_bus_open_system(ret);
+ else if (streq(e, "session") || streq(e, "user"))
+ return sd_bus_open_user(ret);
+ }
+
+ e = secure_getenv("DBUS_STARTER_ADDRESS");
+ if (!e) {
+ if (cg_pid_get_owner_uid(0, NULL) >= 0)
+ return sd_bus_open_user(ret);
+ else
+ return sd_bus_open_system(ret);
+ }
+
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_address(b, e);
+ if (r < 0)
+ goto fail;
+
+ b->bus_client = true;
+
+ /* We don't know whether the bus is trusted or not, so better
+ * be safe, and authenticate everything */
+ b->trusted = false;
+ b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
+
+ r = sd_bus_start(b);
+ if (r < 0)
+ goto fail;
+
+ *ret = b;
+ return 0;
+
+fail:
+ bus_free(b);
+ return r;
+}
+
_public_ int sd_bus_open_system(sd_bus **ret) {
const char *e;
sd_bus *b;
goto fail;
b->bus_client = true;
+ b->is_system = true;
/* Let's do per-method access control on the system bus. We
* need the caller's UID and capability set for that. */
}
b->bus_client = true;
+ b->is_user = true;
/* We don't do any per-method access control on the user
* bus. */
return r;
}
-_public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) {
+_public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) {
_cleanup_free_ char *e = NULL;
char *p = NULL;
sd_bus *bus;
return 0;
}
-_public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) {
+_public_ int sd_bus_open_system_container(sd_bus **ret, const char *machine) {
_cleanup_free_ char *e = NULL;
sd_bus *bus;
char *p;
if (!bus)
return NULL;
- i = REFCNT_DEC(bus->n_ref);
- if (i != bus->rqueue_size + bus->wqueue_size)
- return NULL;
+ if (REFCNT_GET(bus->n_ref) == bus->rqueue_size + bus->wqueue_size + 1) {
+ bool q = true;
+
+ for (i = 0; i < bus->rqueue_size; i++)
+ if (bus->rqueue[i]->n_ref > 1) {
+ q = false;
+ break;
+ }
- for (i = 0; i < bus->rqueue_size; i++)
- if (bus->rqueue[i]->n_ref > 1)
- return NULL;
+ if (q) {
+ for (i = 0; i < bus->wqueue_size; i++)
+ if (bus->wqueue[i]->n_ref > 1) {
+ q = false;
+ break;
+ }
+ }
- for (i = 0; i < bus->wqueue_size; i++)
- if (bus->wqueue[i]->n_ref > 1)
- return NULL;
+ /* We are the only holders on the messages, and the
+ * messages are the only holders on us, so let's drop
+ * the messages and thus implicitly also kill our own
+ * last references */
- /* we are the only holders on the messages */
- bus_free(bus);
+ if (q)
+ bus_reset_queues(bus);
+ }
+
+ i = REFCNT_DEC(bus->n_ref);
+ if (i > 0)
+ return NULL;
+ bus_free(bus);
return NULL;
}
return ret;
}
-static int bus_read_message(sd_bus *bus) {
+static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) {
assert(bus);
if (bus->is_kernel)
- return bus_kernel_read_message(bus);
+ return bus_kernel_read_message(bus, hint_priority, priority);
else
return bus_socket_read_message(bus);
}
return 0;
}
-static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
+static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) {
int r, ret = 0;
assert(bus);
assert(m);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
+ /* Note that the priority logic is only available on kdbus,
+ * where the rqueue is unused. We check the rqueue here
+ * anyway, because it's simple... */
+
for (;;) {
if (bus->rqueue_size > 0) {
/* Dispatch a queued message */
}
/* Try to read a new message */
- r = bus_read_message(bus);
+ r = bus_read_message(bus, hint_priority, priority);
if (r < 0)
return r;
if (r == 0)
i++;
}
- r = bus_read_message(bus);
+ r = bus_read_message(bus, false, 0);
if (r < 0) {
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
bus_enter_closing(bus);
return r;
}
-static int process_running(sd_bus *bus, sd_bus_message **ret) {
+static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r;
if (r != 0)
goto null_message;
- r = dispatch_rqueue(bus, &m);
+ r = dispatch_rqueue(bus, hint_priority, priority, &m);
if (r < 0)
return r;
if (!m)
/* Then, synthesize a Disconnected message */
r = sd_bus_message_new_signal(
bus,
+ &m,
"/org/freedesktop/DBus/Local",
"org.freedesktop.DBus.Local",
- "Disconnected",
- &m);
+ "Disconnected");
if (r < 0)
return r;
return r;
}
-_public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
+static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) {
BUS_DONT_DESTROY(bus);
int r;
case BUS_RUNNING:
case BUS_HELLO:
- r = process_running(bus, ret);
+ r = process_running(bus, hint_priority, priority, ret);
if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
bus_enter_closing(bus);
r = 1;
assert_not_reached("Unknown state");
}
+_public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
+ return bus_process_internal(bus, false, 0, ret);
+}
+
+_public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) {
+ return bus_process_internal(bus, true, priority, ret);
+}
+
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
struct pollfd p[2] = {};
int r, e, n;
return 0;
if (!bus->input_io_event_source) {
- r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source);
+ r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus);
if (r < 0)
return r;
assert(bus->output_fd >= 0);
if (!bus->output_io_event_source) {
- r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source);
+ r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus);
if (r < 0)
return r;
bus->event_priority = priority;
- r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source);
+ r = sd_event_add_monotonic(bus->event, &bus->time_event_source, 0, 0, time_callback, bus);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = sd_event_add_exit(bus->event, quit_callback, bus, &bus->quit_event_source);
+ r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus);
if (r < 0)
goto fail;
return bus_default(sd_bus_open_user, &default_user_bus, ret);
}
+_public_ int sd_bus_default(sd_bus **ret) {
+
+ const char *e;
+
+ /* Let's try our best to reuse another cached connection. If
+ * the starter bus type is set, connect via our normal
+ * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
+ * we can share the connection with the user/system default
+ * bus. */
+
+ e = secure_getenv("DBUS_STARTER_BUS_TYPE");
+ if (e) {
+ if (streq(e, "system"))
+ return sd_bus_default_system(ret);
+ else if (streq(e, "user") || streq(e, "session"))
+ return sd_bus_default_user(ret);
+ }
+
+ /* No type is specified, so we have not other option than to
+ * use the starter address if it is set. */
+
+ e = secure_getenv("DBUS_STARTER_ADDRESS");
+ if (e) {
+ static thread_local sd_bus *default_starter_bus = NULL;
+
+ return bus_default(sd_bus_open, &default_starter_bus, ret);
+ }
+
+ /* Finally, if nothing is set use the cached connection for
+ * the right scope */
+
+ if (cg_pid_get_owner_uid(0, NULL) >= 0)
+ return sd_bus_default_user(ret);
+ else
+ return sd_bus_default_system(ret);
+}
+
_public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) {
assert_return(b, -EINVAL);
assert_return(tid, -EINVAL);
}
_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;
+ return bus_label_escape(s);
}
_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;
+ return bus_label_unescape(f);
}
_public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
sd_bus_close(bus);
return 0;
}
+
+_public_ int sd_bus_get_name(sd_bus *bus, const char **name) {
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ *name = bus->connection_name;
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff