#include <netdb.h>
#include <sys/poll.h>
#include <byteswap.h>
+#include <sys/mman.h>
+#include <pthread.h>
#include "util.h"
#include "macro.h"
#include "bus-socket.h"
#include "bus-kernel.h"
#include "bus-control.h"
+#include "bus-introspect.h"
+#include "bus-signature.h"
+#include "bus-objects.h"
+#include "bus-util.h"
+#include "bus-container.h"
+#include "bus-protocol.h"
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
+static int attach_io_events(sd_bus *b);
+static void detach_io_events(sd_bus *b);
static void bus_close_fds(sd_bus *b) {
assert(b);
+ detach_io_events(b);
+
if (b->input_fd >= 0)
close_nointr_nofail(b->input_fd);
b->input_fd = b->output_fd = -1;
}
+static void bus_node_destroy(sd_bus *b, struct node *n) {
+ struct node_callback *c;
+ struct node_vtable *v;
+ struct node_enumerator *e;
+
+ assert(b);
+
+ if (!n)
+ return;
+
+ while (n->child)
+ bus_node_destroy(b, n->child);
+
+ while ((c = n->callbacks)) {
+ LIST_REMOVE(callbacks, n->callbacks, c);
+ free(c);
+ }
+
+ while ((v = n->vtables)) {
+ LIST_REMOVE(vtables, n->vtables, v);
+ free(v->interface);
+ free(v);
+ }
+
+ while ((e = n->enumerators)) {
+ LIST_REMOVE(enumerators, n->enumerators, e);
+ free(e);
+ }
+
+ if (n->parent)
+ LIST_REMOVE(siblings, n->parent->child, n);
+
+ assert_se(hashmap_remove(b->nodes, n->path) == n);
+ free(n->path);
+ 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_allocated = b->wqueue_allocated = 0;
+ b->rqueue_size = b->wqueue_size = 0;
+}
+
static void bus_free(sd_bus *b) {
struct filter_callback *f;
- struct object_callback *c;
- unsigned i;
+ struct node *n;
assert(b);
+ sd_bus_detach_event(b);
+
bus_close_fds(b);
+ if (b->kdbus_buffer)
+ munmap(b->kdbus_buffer, KDBUS_POOL_SIZE);
+
free(b->rbuffer);
free(b->unique_name);
free(b->auth_buffer);
free(b->address);
free(b->kernel);
+ free(b->machine);
+ free(b->fake_label);
+ free(b->cgroup_root);
free(b->exec_path);
strv_free(b->exec_argv);
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);
while ((f = b->filter_callbacks)) {
- LIST_REMOVE(struct filter_callback, callbacks, b->filter_callbacks, f);
+ LIST_REMOVE(callbacks, b->filter_callbacks, f);
free(f);
}
- while ((c = hashmap_steal_first(b->object_callbacks))) {
- free(c->path);
- free(c);
- }
-
- hashmap_free(b->object_callbacks);
bus_match_free(&b->match_callbacks);
+ hashmap_free_free(b->vtable_methods);
+ hashmap_free_free(b->vtable_properties);
+
+ while ((n = hashmap_first(b->nodes)))
+ bus_node_destroy(b, n);
+
+ hashmap_free(b->nodes);
+
bus_kernel_flush_memfd(b);
+ assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0);
+
free(b);
}
-int sd_bus_new(sd_bus **ret) {
+_public_ int sd_bus_new(sd_bus **ret) {
sd_bus *r;
- if (!ret)
- return -EINVAL;
+ assert_return(ret, -EINVAL);
r = new0(sd_bus, 1);
if (!r)
r->n_ref = REFCNT_INIT;
r->input_fd = r->output_fd = -1;
r->message_version = 1;
- r->negotiate_fds = true;
+ r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
+ r->hello_flags |= KDBUS_HELLO_ACCEPT_FD;
+ r->attach_flags |= KDBUS_ATTACH_NAMES;
+ r->original_pid = getpid();
+
+ assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0);
/* We guarantee that wqueue always has space for at least one
* entry */
- r->wqueue = new(sd_bus_message*, 1);
- if (!r->wqueue) {
+ if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) {
free(r);
return -ENOMEM;
}
return 0;
}
-int sd_bus_set_address(sd_bus *bus, const char *address) {
+_public_ int sd_bus_set_address(sd_bus *bus, const char *address) {
char *a;
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
- if (!address)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(address, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
a = strdup(address);
if (!a)
return 0;
}
-int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
- if (input_fd < 0)
- return -EINVAL;
- if (output_fd < 0)
- return -EINVAL;
+_public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(input_fd >= 0, -EINVAL);
+ assert_return(output_fd >= 0, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
bus->input_fd = input_fd;
bus->output_fd = output_fd;
return 0;
}
-int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
+_public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) {
char *p, **a;
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
- if (!path)
- return -EINVAL;
- if (strv_isempty(argv))
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(path, -EINVAL);
+ assert_return(!strv_isempty(argv), -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
p = strdup(path);
if (!p)
return 0;
}
-int sd_bus_set_bus_client(sd_bus *bus, int b) {
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
+_public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
bus->bus_client = !!b;
return 0;
}
-int sd_bus_set_negotiate_fds(sd_bus *bus, int b) {
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
+_public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- bus->negotiate_fds = !!b;
+ SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b);
return 0;
}
-int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
- if (!bus)
- return -EINVAL;
- if (!b && !sd_id128_equal(server_id, SD_ID128_NULL))
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
+_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->attach_flags, KDBUS_ATTACH_TIMESTAMP, b);
+ return 0;
+}
+
+_public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, uint64_t mask) {
+ assert_return(bus, -EINVAL);
+ assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ /* The well knowns we need unconditionally, so that matches can work */
+ bus->creds_mask = mask | SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME;
+
+ return kdbus_translate_attach_flags(bus->creds_mask, &bus->creds_mask);
+}
+
+_public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
+ assert_return(bus, -EINVAL);
+ assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
bus->is_server = !!b;
bus->server_id = server_id;
return 0;
}
-int sd_bus_set_anonymous(sd_bus *bus, int b) {
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
+_public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
bus->anonymous_auth = !!b;
return 0;
}
-static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) {
+_public_ int sd_bus_set_trusted(sd_bus *bus, int b) {
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ bus->trusted = !!b;
+ return 0;
+}
+
+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 = bus_message_to_errno(reply);
+ r = sd_bus_message_get_errno(reply);
if (r < 0)
return r;
+ if (r > 0)
+ return -r;
r = sd_bus_message_read(reply, "s", &s);
if (r < 0)
if (!bus->unique_name)
return -ENOMEM;
- bus->state = BUS_RUNNING;
+ if (bus->state == BUS_HELLO)
+ bus->state = BUS_RUNNING;
return 1;
}
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.DBus",
- "/",
+ "/org/freedesktop/DBus",
"org.freedesktop.DBus",
"Hello",
&m);
if (r < 0)
return r;
- return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial);
+ return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_cookie);
}
int bus_start_running(sd_bus *bus) {
}
static int parse_address_key(const char **p, const char *key, char **value) {
- size_t l, n = 0;
+ size_t l, n = 0, allocated = 0;
const char *a;
char *r = NULL;
a = *p;
while (*a != ';' && *a != ',' && *a != 0) {
- char c, *t;
+ char c;
if (*a == '%') {
int x, y;
a++;
}
- t = realloc(r, n + 2);
- if (!t) {
- free(r);
+ if (!GREEDY_REALLOC(r, allocated, n + 2))
return -ENOMEM;
- }
- r = t;
r[n++] = c;
}
char *path = NULL;
unsigned n_argv = 0, j;
char **argv = NULL;
+ size_t allocated = 0;
int r;
assert(b);
(*p) ++;
if (ul >= n_argv) {
- char **x;
-
- x = realloc(argv, sizeof(char*) * (ul + 2));
- if (!x) {
+ if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) {
r = -ENOMEM;
goto fail;
}
- memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2));
-
- argv = x;
n_argv = ul + 1;
}
return 0;
}
+static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *machine = NULL;
+ int r;
+
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
+
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
+
+ r = parse_address_key(p, "machine", &machine);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
+
+ skip_address_key(p);
+ }
+
+ if (!machine)
+ return -EINVAL;
+
+ if (!filename_is_safe(machine))
+ return -EINVAL;
+
+ free(b->machine);
+ b->machine = machine;
+ machine = NULL;
+
+ 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;
+
+ return 0;
+}
+
+static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) {
+ _cleanup_free_ char *machine = NULL;
+ int r;
+
+ assert(b);
+ assert(p);
+ assert(*p);
+ assert(guid);
+
+ while (**p != 0 && **p != ';') {
+ r = parse_address_key(p, "guid", guid);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
+
+ r = parse_address_key(p, "machine", &machine);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ continue;
+
+ skip_address_key(p);
+ }
+
+ if (!machine)
+ return -EINVAL;
+
+ if (!filename_is_safe(machine))
+ return -EINVAL;
+
+ free(b->machine);
+ b->machine = machine;
+ machine = NULL;
+
+ free(b->kernel);
+ b->kernel = strdup("/dev/kdbus/0-system/bus");
+ if (!b->kernel)
+ return -ENOMEM;
+
+ return 0;
+}
+
static void bus_reset_parsed_address(sd_bus *b) {
assert(b);
b->server_id = SD_ID128_NULL;
free(b->kernel);
b->kernel = NULL;
+ free(b->machine);
+ b->machine = NULL;
}
static int bus_parse_next_address(sd_bus *b) {
if (r < 0)
return r;
+ break;
+ } else if (startswith(a, "x-container-unix:")) {
+
+ a += 17;
+ r = parse_container_unix_address(b, &a, &guid);
+ if (r < 0)
+ return r;
+
+ break;
+ } else if (startswith(a, "x-container-kernel:")) {
+
+ a += 19;
+ r = parse_container_kernel_address(b, &a, &guid);
+ if (r < 0)
+ return r;
+
break;
}
assert(b);
for (;;) {
- sd_bus_close(b);
-
- if (b->sockaddr.sa.sa_family != AF_UNSPEC) {
-
- r = bus_socket_connect(b);
- if (r >= 0)
- return r;
-
- b->last_connect_error = -r;
+ bool skipped = false;
- } else if (b->exec_path) {
+ bus_close_fds(b);
+ if (b->exec_path)
r = bus_socket_exec(b);
- if (r >= 0)
- return r;
-
- b->last_connect_error = -r;
- } else if (b->kernel) {
-
+ else if (b->machine && b->kernel)
+ r = bus_container_connect_kernel(b);
+ else if (b->machine && b->sockaddr.sa.sa_family != AF_UNSPEC)
+ r = bus_container_connect_socket(b);
+ else if (b->kernel)
r = bus_kernel_connect(b);
- if (r >= 0)
- return r;
+ else if (b->sockaddr.sa.sa_family != AF_UNSPEC)
+ r = bus_socket_connect(b);
+ else
+ skipped = true;
+
+ if (!skipped) {
+ if (r >= 0) {
+ r = attach_io_events(b);
+ if (r >= 0)
+ return r;
+ }
b->last_connect_error = -r;
}
return bus_socket_take_fd(b);
}
-int sd_bus_start(sd_bus *bus) {
+_public_ int sd_bus_start(sd_bus *bus) {
int r;
- if (!bus)
- return -EINVAL;
- if (bus->state != BUS_UNSET)
- return -EPERM;
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state == BUS_UNSET, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
bus->state = BUS_OPENING;
if (bus->input_fd >= 0)
r = bus_start_fd(bus);
- else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel)
+ else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine)
r = bus_start_address(bus);
else
return -EINVAL;
return bus_send_hello(bus);
}
-int sd_bus_open_system(sd_bus **ret) {
+_public_ int sd_bus_open_system(sd_bus **ret) {
const char *e;
sd_bus *b;
int r;
- if (!ret)
- return -EINVAL;
+ assert_return(ret, -EINVAL);
r = sd_bus_new(&b);
if (r < 0)
return r;
e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
- if (e) {
+ if (e)
r = sd_bus_set_address(b, e);
- if (r < 0)
- goto fail;
- } else {
- b->sockaddr.un.sun_family = AF_UNIX;
- strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
- }
+ else
+#ifdef ENABLE_KDBUS
+ r = sd_bus_set_address(b, "kernel:path=/dev/kdbus/0-system/bus;unix:path=/run/dbus/system_bus_socket");
+#else
+ r = sd_bus_set_address(b, "unix:path=/run/dbus/system_bus_socket");
+#endif
+
+ if (r < 0)
+ goto fail;
b->bus_client = true;
+ /* Let's do per-method access control on the system bus. We
+ * need the caller's UID and capability set for that. */
+ b->trusted = false;
+ b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
+
r = sd_bus_start(b);
if (r < 0)
goto fail;
return r;
}
-int sd_bus_open_user(sd_bus **ret) {
+_public_ int sd_bus_open_user(sd_bus **ret) {
const char *e;
sd_bus *b;
- size_t l;
int r;
- if (!ret)
- return -EINVAL;
+ assert_return(ret, -EINVAL);
r = sd_bus_new(&b);
if (r < 0)
goto fail;
} else {
e = secure_getenv("XDG_RUNTIME_DIR");
- if (!e) {
- r = -ENOENT;
- goto fail;
+ if (e) {
+ _cleanup_free_ char *ee = NULL;
+
+ ee = bus_address_escape(e);
+ if (!ee) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+#ifdef ENABLE_KDBUS
+ asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus;unix:path=%s/bus", (unsigned long) getuid(), ee);
+#else
+ b->address = strjoin("unix:path=", ee, "/bus", NULL);
+#endif
+ } else {
+#ifdef ENABLE_KDBUS
+ asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus", (unsigned long) getuid());
+#else
+ return -ECONNREFUSED;
+#endif
}
- l = strlen(e);
- if (l + 4 > sizeof(b->sockaddr.un.sun_path)) {
- r = -E2BIG;
+ if (!b->address) {
+ r = -ENOMEM;
goto fail;
}
-
- b->sockaddr.un.sun_family = AF_UNIX;
- memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
- b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
}
b->bus_client = true;
+ /* We don't do any per-method access control on the user
+ * bus. */
+ b->trusted = true;
+
r = sd_bus_start(b);
if (r < 0)
goto fail;
return r;
}
-void sd_bus_close(sd_bus *bus) {
- if (!bus)
- return;
-
- if (bus->state != BUS_CLOSED)
- return;
-
- bus->state = BUS_CLOSED;
-
- if (!bus->is_kernel)
- bus_close_fds(bus);
+_public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) {
+ _cleanup_free_ char *e = NULL;
+ char *p = NULL;
+ sd_bus *bus;
+ int r;
- /* We'll leave the fd open in case this is a kernel bus, since
- * there might still be memblocks around that reference this
- * bus, and they might need to invoke the
- * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are
- * freed. */
-}
+ assert_return(host, -EINVAL);
+ assert_return(ret, -EINVAL);
-sd_bus *sd_bus_ref(sd_bus *bus) {
- if (!bus)
- return NULL;
+ e = bus_address_escape(host);
+ if (!e)
+ return -ENOMEM;
- assert_se(REFCNT_INC(bus->n_ref) >= 2);
+ p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL);
+ if (!p)
+ return -ENOMEM;
- return bus;
-}
+ r = sd_bus_new(&bus);
+ if (r < 0) {
+ free(p);
+ return r;
+ }
-sd_bus *sd_bus_unref(sd_bus *bus) {
- if (!bus)
- return NULL;
+ bus->address = p;
+ bus->bus_client = true;
- if (REFCNT_DEC(bus->n_ref) <= 0)
+ r = sd_bus_start(bus);
+ if (r < 0) {
bus_free(bus);
+ return r;
+ }
- return NULL;
-}
-
-int sd_bus_is_open(sd_bus *bus) {
- if (!bus)
- return -EINVAL;
-
- return BUS_IS_OPEN(bus->state);
+ *ret = bus;
+ return 0;
}
-int sd_bus_can_send(sd_bus *bus, char type) {
+_public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) {
+ _cleanup_free_ char *e = NULL;
+ sd_bus *bus;
+ char *p;
int r;
- if (!bus)
- return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
+ assert_return(machine, -EINVAL);
+ assert_return(ret, -EINVAL);
+ assert_return(filename_is_safe(machine), -EINVAL);
- if (type == SD_BUS_TYPE_UNIX_FD) {
- if (!bus->negotiate_fds)
- return 0;
+ e = bus_address_escape(machine);
+ if (!e)
+ return -ENOMEM;
- r = bus_ensure_running(bus);
- if (r < 0)
- return r;
+#ifdef ENABLE_KDBUS
+ p = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL);
+#else
+ p = strjoin("x-container-unix:machine=", e, NULL);
+#endif
+ if (!p)
+ return -ENOMEM;
+
+ r = sd_bus_new(&bus);
+ if (r < 0) {
+ free(p);
+ return r;
+ }
+
+ bus->address = p;
+ bus->bus_client = true;
+
+ r = sd_bus_start(bus);
+ if (r < 0) {
+ bus_free(bus);
+ return r;
+ }
+
+ *ret = bus;
+ return 0;
+}
+
+_public_ void sd_bus_close(sd_bus *bus) {
+
+ if (!bus)
+ return;
+ if (bus->state == BUS_CLOSED)
+ return;
+ if (bus_pid_changed(bus))
+ return;
+
+ 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);
+
+ /* We'll leave the fd open in case this is a kernel bus, since
+ * there might still be memblocks around that reference this
+ * bus, and they might need to invoke the * KDBUS_CMD_FREE
+ * ioctl on the fd when they are 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);
+
+ assert_se(REFCNT_INC(bus->n_ref) >= 2);
+
+ return bus;
+}
+
+_public_ sd_bus *sd_bus_unref(sd_bus *bus) {
+
+ if (!bus)
+ return NULL;
+
+ if (REFCNT_DEC(bus->n_ref) <= 0)
+ bus_free(bus);
+
+ return NULL;
+}
+
+_public_ int sd_bus_is_open(sd_bus *bus) {
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ return BUS_IS_OPEN(bus->state);
+}
+
+_public_ int sd_bus_can_send(sd_bus *bus, char type) {
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(bus->state != BUS_UNSET, -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (type == SD_BUS_TYPE_UNIX_FD) {
+ if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD))
+ return 0;
+
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
return bus->can_fds;
}
return bus_type_is_valid(type);
}
-int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) {
+_public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) {
int r;
- if (!bus)
- return -EINVAL;
- if (!server_id)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(server_id, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
r = bus_ensure_running(bus);
if (r < 0)
return 0;
}
-static int bus_seal_message(sd_bus *b, sd_bus_message *m) {
+static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) {
+ assert(b);
assert(m);
- if (m->header->version > b->message_version)
- return -EPERM;
+ if (m->sealed) {
+ /* If we copy the same message to multiple
+ * destinations, avoid using the same cookie
+ * numbers. */
+ b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m));
+ return 0;
+ }
+
+ if (timeout == 0)
+ timeout = BUS_DEFAULT_TIMEOUT;
+
+ return bus_message_seal(m, ++b->cookie, timeout);
+}
+
+static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) {
+ assert(b);
- if (m->sealed)
+ /* Do packet version and endianess already match? */
+ if ((b->message_version == 0 || b->message_version == (*m)->header->version) &&
+ (b->message_endian == 0 || b->message_endian == (*m)->header->endian))
return 0;
- return bus_message_seal(m, ++b->serial);
+ /* No? Then remarshal! */
+ return bus_message_remarshal(b, m);
+}
+
+int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) {
+ assert(b);
+ assert(m);
+
+ /* The bus specification says the serial number cannot be 0,
+ * hence let's fill something in for synthetic messages. Since
+ * synthetic messages might have a fake sender and we don't
+ * want to interfere with the real sender's serial numbers we
+ * pick a fixed, artifical one. We use (uint32_t) -1 rather
+ * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
+ * even though kdbus can do 64bit. */
+
+ return bus_message_seal(m, 0xFFFFFFFFULL, 0);
+}
+
+static int bus_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) {
+ int r;
+
+ assert(bus);
+ assert(m);
+
+ if (bus->is_kernel)
+ r = bus_kernel_write_message(bus, m);
+ else
+ r = bus_socket_write_message(bus, m, idx);
+
+ if (r <= 0)
+ return r;
+
+ if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m))
+ log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s",
+ bus_message_type_to_string(m->header->type),
+ strna(sd_bus_message_get_sender(m)),
+ strna(sd_bus_message_get_destination(m)),
+ strna(sd_bus_message_get_path(m)),
+ strna(sd_bus_message_get_interface(m)),
+ strna(sd_bus_message_get_member(m)),
+ (unsigned long) BUS_MESSAGE_COOKIE(m),
+ (unsigned long) m->reply_cookie,
+ strna(m->error.message));
+
+ return r;
}
static int dispatch_wqueue(sd_bus *bus) {
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) {
+ assert(bus);
+
+ if (bus->is_kernel)
+ return bus_kernel_read_message(bus);
+ else
+ return bus_socket_read_message(bus);
+}
+
+int bus_rqueue_make_room(sd_bus *bus) {
+ assert(bus);
+
+ if (bus->rqueue_size >= BUS_RQUEUE_MAX)
+ return -ENOBUFS;
+
+ if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1))
+ return -ENOMEM;
+
+ return 0;
+}
+
static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
- sd_bus_message *z = NULL;
int r, ret = 0;
assert(bus);
assert(m);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
- if (bus->rqueue_size > 0) {
- /* Dispatch a queued message */
-
- *m = bus->rqueue[0];
- bus->rqueue_size --;
- memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size);
- return 1;
- }
+ for (;;) {
+ if (bus->rqueue_size > 0) {
+ /* Dispatch a queued message */
- /* 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);
+ *m = bus->rqueue[0];
+ bus->rqueue_size --;
+ memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size);
+ return 1;
+ }
- if (r < 0) {
- sd_bus_close(bus);
+ /* Try to read a new message */
+ r = bus_read_message(bus);
+ if (r < 0)
return r;
- }
if (r == 0)
return ret;
- r = 1;
- } while (!z);
-
- *m = z;
- return 1;
+ ret = 1;
+ }
}
-int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
+_public_ int sd_bus_send(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
int r;
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
if (m->n_fds > 0) {
r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
return -ENOTSUP;
}
- /* If the serial number isn't kept, then we know that no reply
+ /* If the cookie number isn't kept, then we know that no reply
* is expected */
- if (!serial && !m->sealed)
- m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
+ if (!cookie && !m->sealed)
+ m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
+
+ r = bus_seal_message(bus, m, 0);
+ if (r < 0)
+ return r;
- r = bus_seal_message(bus, m);
+ /* Remarshall if we have to. This will possible unref the
+ * message and place a replacement in m */
+ r = bus_remarshal_message(bus, &m);
if (r < 0)
return r;
/* If this is a reply and no reply was requested, then let's
* suppress this, if we can */
- if (m->dont_send && !serial)
- return 0;
+ if (m->dont_send && !cookie)
+ return 1;
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);
-
+ r = bus_write_message(bus, m, &idx);
if (r < 0) {
- sd_bus_close(bus);
+ if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN)
+ bus_enter_closing(bus);
+
return r;
} else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) {
/* Wasn't fully written. So let's remember how
bus->windex = idx;
}
} else {
- sd_bus_message **q;
-
/* Just append it to the queue. */
if (bus->wqueue_size >= BUS_WQUEUE_MAX)
return -ENOBUFS;
- q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1));
- if (!q)
+ if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1))
return -ENOMEM;
- bus->wqueue = q;
- q[bus->wqueue_size ++] = sd_bus_message_ref(m);
+ bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m);
}
- if (serial)
- *serial = BUS_MESSAGE_SERIAL(m);
+ if (cookie)
+ *cookie = BUS_MESSAGE_COOKIE(m);
- return 0;
+ return 1;
+}
+
+_public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) {
+ 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, cookie);
}
static usec_t calc_elapse(uint64_t usec) {
if (usec == (uint64_t) -1)
return 0;
- if (usec == 0)
- usec = BUS_DEFAULT_TIMEOUT;
-
return now(CLOCK_MONOTONIC) + usec;
}
return 0;
}
-int sd_bus_send_with_reply(
+_public_ int sd_bus_call_async(
sd_bus *bus,
- sd_bus_message *m,
+ sd_bus_message *_m,
sd_bus_message_handler_t callback,
void *userdata,
uint64_t usec,
- uint64_t *serial) {
+ uint64_t *cookie) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
struct reply_callback *c;
int r;
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
+ assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func);
if (r < 0)
return r;
- if (usec != (uint64_t) -1) {
- r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare);
- if (r < 0)
- return r;
- }
+ r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare);
+ if (r < 0)
+ return r;
+
+ r = bus_seal_message(bus, m, usec);
+ if (r < 0)
+ return r;
- r = bus_seal_message(bus, m);
+ r = bus_remarshal_message(bus, &m);
if (r < 0)
return r;
c->callback = callback;
c->userdata = userdata;
- c->serial = BUS_MESSAGE_SERIAL(m);
- c->timeout = calc_elapse(usec);
+ c->cookie = BUS_MESSAGE_COOKIE(m);
+ c->timeout = calc_elapse(m->timeout);
- r = hashmap_put(bus->reply_callbacks, &c->serial, c);
+ r = hashmap_put(bus->reply_callbacks, &c->cookie, c);
if (r < 0) {
free(c);
return r;
r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx);
if (r < 0) {
c->timeout = 0;
- sd_bus_send_with_reply_cancel(bus, c->serial);
+ sd_bus_call_async_cancel(bus, c->cookie);
return r;
}
}
- r = sd_bus_send(bus, m, serial);
+ r = sd_bus_send(bus, m, cookie);
if (r < 0) {
- sd_bus_send_with_reply_cancel(bus, c->serial);
+ sd_bus_call_async_cancel(bus, c->cookie);
return r;
}
return r;
}
-int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) {
+_public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t cookie) {
struct reply_callback *c;
- if (!bus)
- return -EINVAL;
- if (serial == 0)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(cookie != 0, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- c = hashmap_remove(bus->reply_callbacks, &serial);
+ c = hashmap_remove(bus->reply_callbacks, &cookie);
if (!c)
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;
}
}
-int sd_bus_send_with_reply_and_block(
+_public_ int sd_bus_call(
sd_bus *bus,
- sd_bus_message *m,
+ sd_bus_message *_m,
uint64_t usec,
sd_bus_error *error,
sd_bus_message **reply) {
- int r;
+ _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m);
usec_t timeout;
- uint64_t serial;
- bool room = false;
+ uint64_t cookie;
+ unsigned i;
+ int r;
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (!m)
- return -EINVAL;
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
- return -EINVAL;
- if (bus_error_is_dirty(error))
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(m, -EINVAL);
+ assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL);
+ assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL);
+ assert_return(!bus_error_is_dirty(error), -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
r = bus_ensure_running(bus);
if (r < 0)
return r;
- r = sd_bus_send(bus, m, &serial);
+ i = bus->rqueue_size;
+
+ r = bus_seal_message(bus, m, usec);
if (r < 0)
return r;
- timeout = calc_elapse(usec);
-
- for (;;) {
- usec_t left;
- sd_bus_message *incoming = NULL;
-
- if (!room) {
- sd_bus_message **q;
+ r = bus_remarshal_message(bus, &m);
+ if (r < 0)
+ return r;
- if (bus->rqueue_size >= BUS_RQUEUE_MAX)
- return -ENOBUFS;
+ r = sd_bus_send(bus, m, &cookie);
+ if (r < 0)
+ return r;
- /* Make sure there's room for queuing this
- * locally, before we read the message */
+ timeout = calc_elapse(m->timeout);
- q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*));
- if (!q)
- return -ENOMEM;
+ for (;;) {
+ usec_t left;
- bus->rqueue = q;
- room = true;
- }
+ while (i < bus->rqueue_size) {
+ sd_bus_message *incoming = NULL;
- if (bus->is_kernel)
- r = bus_kernel_read_message(bus, &incoming);
- else
- r = bus_socket_read_message(bus, &incoming);
- if (r < 0)
- return r;
- if (incoming) {
+ incoming = bus->rqueue[i];
- if (incoming->reply_serial == serial) {
+ if (incoming->reply_cookie == cookie) {
/* Found a match! */
- if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_RETURN) {
+ memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1));
+ bus->rqueue_size--;
+
+ if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) {
if (reply)
*reply = incoming;
else
sd_bus_message_unref(incoming);
- return 0;
- }
+ return 1;
+ } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR)
+ r = sd_bus_error_copy(error, &incoming->error);
+ else
+ r = -EIO;
+
+ sd_bus_message_unref(incoming);
+ return r;
- if (incoming->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR) {
- int k;
+ } else if (BUS_MESSAGE_COOKIE(incoming) == cookie &&
+ bus->unique_name &&
+ incoming->sender &&
+ streq(bus->unique_name, incoming->sender)) {
- r = sd_bus_error_copy(error, &incoming->error);
- if (r < 0) {
- sd_bus_message_unref(incoming);
- return r;
- }
+ memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1));
+ bus->rqueue_size--;
- k = bus_error_to_errno(&incoming->error);
- sd_bus_message_unref(incoming);
- return k;
- }
+ /* 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 -EIO;
+ return -ELOOP;
}
- /* There's already guaranteed to be room for
- * this, so need to resize things here */
- bus->rqueue[bus->rqueue_size ++] = incoming;
- room = false;
-
/* Try to read more, right-away */
- continue;
+ i++;
}
- if (r != 0)
+
+ r = bus_read_message(bus);
+ if (r < 0) {
+ if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN)
+ bus_enter_closing(bus);
+
+ return r;
+ }
+ if (r > 0)
continue;
if (timeout > 0) {
r = bus_poll(bus, true, left);
if (r < 0)
return r;
+ if (r == 0)
+ return -ETIMEDOUT;
r = dispatch_wqueue(bus);
- if (r < 0)
+ if (r < 0) {
+ if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN)
+ bus_enter_closing(bus);
+
return r;
+ }
}
}
-int sd_bus_get_fd(sd_bus *bus) {
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus->input_fd != bus->output_fd)
- return -EPERM;
+_public_ int sd_bus_get_fd(sd_bus *bus) {
+
+ assert_return(bus, -EINVAL);
+ assert_return(bus->input_fd == bus->output_fd, -EPERM);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
return bus->input_fd;
}
-int sd_bus_get_events(sd_bus *bus) {
+_public_ int sd_bus_get_events(sd_bus *bus) {
int flags = 0;
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->state == BUS_OPENING)
flags |= POLLOUT;
return flags;
}
-int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
+_public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
struct reply_callback *c;
- if (!bus)
- return -EINVAL;
- if (!timeout_usec)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ assert_return(timeout_usec, -EINVAL);
+ 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 0;
}
+ if (bus->rqueue_size > 0) {
+ *timeout_usec = 0;
+ return 1;
+ }
+
c = prioq_peek(bus->reply_callbacks_prioq);
if (!c) {
*timeout_usec = (uint64_t) -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("org.freedesktop.DBus.Error.Timeout", "Timed out"),
+ c->cookie,
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"),
&m);
if (r < 0)
return r;
+ m->sender = "org.freedesktop.DBus";
+
+ r = bus_seal_synthetic_message(bus, m);
+ if (r < 0)
+ return r;
+
assert_se(prioq_pop(bus->reply_callbacks_prioq) == c);
- hashmap_remove(bus->reply_callbacks, &c->serial);
+ hashmap_remove(bus->reply_callbacks, &c->cookie);
- 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) {
* here (we leave that to the usual handling), we just verify
* we don't let any earlier msg through. */
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN &&
- m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR)
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
+ m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
return -EIO;
- if (m->reply_serial != bus->hello_serial)
+ if (m->reply_cookie != bus->hello_cookie)
return -EIO;
return 0;
}
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;
assert(bus);
assert(m);
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN &&
- m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR)
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN &&
+ m->header->type != SD_BUS_MESSAGE_METHOD_ERROR)
return 0;
- c = hashmap_remove(bus->reply_callbacks, &m->reply_serial);
+ c = hashmap_remove(bus->reply_callbacks, &m->reply_cookie);
if (!c)
return 0;
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;
assert(bus);
assert(m);
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ if (bus->manual_peer_interface)
+ return 0;
+
+ if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL)
return 0;
if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer"))
return 0;
- if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
+ if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
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 {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- sd_bus_error_set(&error,
- "org.freedesktop.DBus.Error.UnknownMethod",
+ r = sd_bus_message_new_method_errorf(
+ m, &reply,
+ SD_BUS_ERROR_UNKNOWN_METHOD,
"Unknown method '%s' on interface '%s'.", m->member, m->interface);
-
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
}
if (r < 0)
return 1;
}
-static int process_object(sd_bus *bus, sd_bus_message *m) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- struct object_callback *c;
- int r;
- bool found = false;
- size_t pl;
-
- assert(bus);
- assert(m);
-
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return 0;
-
- if (hashmap_isempty(bus->object_callbacks))
- return 0;
-
- pl = strlen(m->path);
-
- do {
- char p[pl+1];
-
- bus->object_callbacks_modified = false;
-
- c = hashmap_get(bus->object_callbacks, m->path);
- if (c && c->last_iteration != bus->iteration_counter) {
-
- c->last_iteration = bus->iteration_counter;
-
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
-
- r = c->callback(bus, m, c->userdata);
- if (r != 0)
- return r;
-
- found = true;
- }
-
- /* Look for fallback prefixes */
- strcpy(p, m->path);
- for (;;) {
- char *e;
-
- if (bus->object_callbacks_modified)
- break;
-
- e = strrchr(p, '/');
- if (e == p || !e)
- break;
-
- *e = 0;
-
- c = hashmap_get(bus->object_callbacks, p);
- if (c && c->last_iteration != bus->iteration_counter && c->is_fallback) {
-
- c->last_iteration = bus->iteration_counter;
-
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
-
- r = c->callback(bus, m, c->userdata);
- if (r != 0)
- return r;
-
- found = true;
- }
- }
-
- } while (bus->object_callbacks_modified);
-
- /* We found some handlers but none wanted to take this, then
- * return this -- with one exception, we can handle
- * introspection minimally ourselves */
- if (!found || sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect"))
- return 0;
-
- sd_bus_error_set(&error,
- "org.freedesktop.DBus.Error.UnknownMethod",
- "Unknown method '%s' or interface '%s'.", m->member, m->interface);
-
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
- if (r < 0)
- return r;
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int process_introspect(sd_bus *bus, sd_bus_message *m) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_free_ char *introspection = NULL;
- _cleanup_set_free_free_ Set *s = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- struct object_callback *c;
- Iterator i;
- size_t size = 0;
- char *node;
- int r;
-
- assert(bus);
- assert(m);
-
- if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect"))
- return 0;
-
- if (!m->path)
- return 0;
-
- s = set_new(string_hash_func, string_compare_func);
- if (!s)
- return -ENOMEM;
-
- HASHMAP_FOREACH(c, bus->object_callbacks, i) {
- const char *e;
- char *a, *p;
-
- if (streq(c->path, "/"))
- continue;
-
- if (streq(m->path, "/"))
- e = c->path;
- else {
- e = startswith(c->path, m->path);
- if (!e || *e != '/')
- continue;
- }
-
- a = strdup(e+1);
- if (!a)
- return -ENOMEM;
-
- p = strchr(a, '/');
- if (p)
- *p = 0;
-
- r = set_consume(s, a);
- if (r < 0 && r != -EEXIST)
- return r;
- }
-
- f = open_memstream(&introspection, &size);
- if (!f)
- return -ENOMEM;
-
- fputs(SD_BUS_INTROSPECT_DOCTYPE, f);
- fputs("<node>\n", f);
- fputs(SD_BUS_INTROSPECT_INTERFACE_PEER, f);
- fputs(SD_BUS_INTROSPECT_INTERFACE_INTROSPECTABLE, f);
-
- while ((node = set_steal_first(s))) {
- fprintf(f, " <node name=\"%s\"/>\n", node);
- free(node);
- }
-
- fputs("</node>\n", f);
-
- fflush(f);
-
- if (ferror(f))
- return -ENOMEM;
-
- r = sd_bus_message_new_method_return(bus, m, &reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(reply, "s", introspection);
- if (r < 0)
- return r;
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- return r;
-
- return 1;
-}
-
static int process_message(sd_bus *bus, sd_bus_message *m) {
int r;
assert(bus);
assert(m);
+ bus->current = m;
bus->iteration_counter++;
+ log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%lu reply_cookie=%lu error=%s",
+ bus_message_type_to_string(m->header->type),
+ strna(sd_bus_message_get_sender(m)),
+ strna(sd_bus_message_get_destination(m)),
+ strna(sd_bus_message_get_path(m)),
+ strna(sd_bus_message_get_interface(m)),
+ strna(sd_bus_message_get_member(m)),
+ (unsigned long) BUS_MESSAGE_COOKIE(m),
+ (unsigned long) m->reply_cookie,
+ strna(m->error.message));
+
r = process_hello(bus, m);
if (r != 0)
- return r;
+ goto finish;
r = process_reply(bus, m);
if (r != 0)
- return r;
+ goto finish;
r = process_filter(bus, m);
if (r != 0)
- return r;
+ goto finish;
r = process_match(bus, m);
if (r != 0)
- return r;
+ goto finish;
r = process_builtin(bus, m);
if (r != 0)
- return r;
+ goto finish;
- r = process_object(bus, m);
- if (r != 0)
- return r;
+ r = bus_process_object(bus, m);
- return process_introspect(bus, m);
+finish:
+ bus->current = NULL;
+ return r;
}
static int process_running(sd_bus *bus, sd_bus_message **ret) {
return 1;
}
- if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- sd_bus_error_set(&error, "org.freedesktop.DBus.Error.UnknownObject", "Unknown object '%s'.", m->path);
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) {
- r = sd_bus_message_new_method_error(bus, m, &error, &reply);
- if (r < 0)
- return r;
+ log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
+ strna(sd_bus_message_get_sender(m)),
+ strna(sd_bus_message_get_path(m)),
+ strna(sd_bus_message_get_interface(m)),
+ strna(sd_bus_message_get_member(m)));
- r = sd_bus_send(bus, reply, NULL);
+ r = sd_bus_reply_method_errorf(
+ m,
+ SD_BUS_ERROR_UNKNOWN_OBJECT,
+ "Unknown object '%s'.", m->path);
if (r < 0)
return r;
}
return r;
}
-int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
+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->cookie,
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"),
+ &m);
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_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->cookie);
+
+ 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;
+
+ m->sender = "org.freedesktop.DBus.Local";
+
+ r = bus_seal_synthetic_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;
/* Returns 0 when we didn't do anything. This should cause the
* time. Returns > 0 when we did something, which possibly
* means *ret is filled in with an unprocessed message. */
- if (!bus)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
/* We don't allow recursively invoking sd_bus_process(). */
- if (bus->processing)
- return -EBUSY;
+ assert_return(!bus->current, -EBUSY);
switch (bus->state) {
case BUS_UNSET:
- case BUS_CLOSED:
return -ENOTCONN;
+ case BUS_CLOSED:
+ return -ECONNRESET;
+
case BUS_OPENING:
r = bus_socket_process_opening(bus);
- if (r < 0)
+ if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) {
+ 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 || r == -ESHUTDOWN) {
+ 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 || r == -ESHUTDOWN) {
+ 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");
struct pollfd p[2] = {};
int r, e, n;
struct timespec ts;
- usec_t until, m;
+ usec_t m = (usec_t) -1;
assert(bus);
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
+ if (bus->state == BUS_CLOSING)
+ return 1;
+
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
e = sd_bus_get_events(bus);
if (e < 0)
return e;
if (need_more)
+ /* The caller really needs some more data, he doesn't
+ * care about what's already read, or any timeouts
+ * except its own.*/
e |= POLLIN;
-
- r = sd_bus_get_timeout(bus, &until);
- if (r < 0)
- return r;
- if (r == 0)
- m = (uint64_t) -1;
else {
- usec_t nw;
- nw = now(CLOCK_MONOTONIC);
- m = until > nw ? until - nw : 0;
+ usec_t until;
+ /* The caller wants to process if there's something to
+ * process, but doesn't care otherwise */
+
+ r = sd_bus_get_timeout(bus, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ usec_t nw;
+ nw = now(CLOCK_MONOTONIC);
+ m = until > nw ? until - nw : 0;
+ }
}
if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
return r > 0 ? 1 : 0;
}
-int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
+_public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (bus->state == BUS_CLOSING)
+ return 0;
+
+ assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN);
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
if (bus->rqueue_size > 0)
return 0;
return bus_poll(bus, false, timeout_usec);
}
-int sd_bus_flush(sd_bus *bus) {
+_public_ int sd_bus_flush(sd_bus *bus) {
int r;
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
+ assert_return(bus, -EINVAL);
+ 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)
for (;;) {
r = dispatch_wqueue(bus);
- if (r < 0)
+ if (r < 0) {
+ if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN)
+ bus_enter_closing(bus);
+
return r;
+ }
if (bus->wqueue_size <= 0)
return 0;
}
}
-int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
+_public_ int sd_bus_add_filter(sd_bus *bus,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
struct filter_callback *f;
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
f = new0(struct filter_callback, 1);
if (!f)
f->userdata = userdata;
bus->filter_callbacks_modified = true;
- LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f);
+ LIST_PREPEND(callbacks, bus->filter_callbacks, f);
return 0;
}
-int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
+_public_ int sd_bus_remove_filter(sd_bus *bus,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
struct filter_callback *f;
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(callback, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
LIST_FOREACH(callbacks, f, bus->filter_callbacks) {
if (f->callback == callback && f->userdata == userdata) {
bus->filter_callbacks_modified = true;
- LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f);
+ LIST_REMOVE(callbacks, bus->filter_callbacks, f);
free(f);
return 1;
}
return 0;
}
-static int bus_add_object(
- sd_bus *bus,
- bool fallback,
- const char *path,
- sd_bus_message_handler_t callback,
- void *userdata) {
+_public_ int sd_bus_add_match(sd_bus *bus,
+ const char *match,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
- struct object_callback *c;
- int r;
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ uint64_t cookie = 0;
+ int r = 0;
- if (!bus)
- return -EINVAL;
- if (!path)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(match, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- r = hashmap_ensure_allocated(&bus->object_callbacks, string_hash_func, string_compare_func);
+ r = bus_match_parse(match, &components, &n_components);
if (r < 0)
- return r;
+ goto finish;
- c = new0(struct object_callback, 1);
- if (!c)
- return -ENOMEM;
+ if (bus->bus_client) {
+ cookie = ++bus->match_cookie;
- c->path = strdup(path);
- if (!c->path) {
- free(c);
- return -ENOMEM;
+ r = bus_add_match_internal(bus, match, components, n_components, cookie);
+ if (r < 0)
+ goto finish;
}
- c->callback = callback;
- c->userdata = userdata;
- c->is_fallback = fallback;
-
- bus->object_callbacks_modified = true;
- r = hashmap_put(bus->object_callbacks, c->path, c);
+ bus->match_callbacks_modified = true;
+ r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL);
if (r < 0) {
- free(c->path);
- free(c);
- return r;
+ if (bus->bus_client)
+ bus_remove_match_internal(bus, match, cookie);
}
- return 0;
+finish:
+ bus_match_parse_free(components, n_components);
+ return r;
}
-static int bus_remove_object(
- sd_bus *bus,
- bool fallback,
- const char *path,
- sd_bus_message_handler_t callback,
- void *userdata) {
+_public_ int sd_bus_remove_match(sd_bus *bus,
+ const char *match,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
- struct object_callback *c;
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ int r = 0, q = 0;
+ uint64_t cookie = 0;
- if (!bus)
- return -EINVAL;
- if (!path)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(match, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- c = hashmap_get(bus->object_callbacks, path);
- if (!c)
- return 0;
+ r = bus_match_parse(match, &components, &n_components);
+ if (r < 0)
+ return r;
- if (c->callback != callback || c->userdata != userdata || c->is_fallback != fallback)
- return 0;
+ bus->match_callbacks_modified = true;
+ r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie);
- bus->object_callbacks_modified = true;
- assert_se(c == hashmap_remove(bus->object_callbacks, c->path));
+ if (bus->bus_client)
+ q = bus_remove_match_internal(bus, match, cookie);
- free(c->path);
- free(c);
+ bus_match_parse_free(components, n_components);
- return 1;
+ return r < 0 ? r : q;
}
-int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
- return bus_add_object(bus, false, path, callback, userdata);
-}
+bool bus_pid_changed(sd_bus *bus) {
+ assert(bus);
-int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
- return bus_remove_object(bus, false, path, callback, userdata);
+ /* We don't support people creating a bus connection and
+ * keeping it around over a fork(). Let's complain. */
+
+ return bus->original_pid != getpid();
}
-int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
- return bus_add_object(bus, true, prefix, callback, userdata);
+static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
}
-int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
- return bus_remove_object(bus, true, prefix, callback, userdata);
+static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
+ sd_bus *bus = userdata;
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
}
-int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
- int r = 0;
+static int prepare_callback(sd_event_source *s, void *userdata) {
+ sd_bus *bus = userdata;
+ int r, e;
+ usec_t until;
- if (!bus)
- return -EINVAL;
- if (!match)
- return -EINVAL;
+ assert(s);
+ assert(bus);
- if (bus->bus_client) {
- r = bus_add_match_internal(bus, match);
+ e = sd_bus_get_events(bus);
+ if (e < 0)
+ return e;
+
+ if (bus->output_fd != bus->input_fd) {
+
+ r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT);
+ if (r < 0)
+ return r;
+ } else {
+ r = sd_event_source_set_io_events(bus->input_io_event_source, e);
if (r < 0)
return r;
}
- if (callback) {
- bus->match_callbacks_modified = true;
- r = bus_match_add(&bus->match_callbacks, match, callback, userdata, NULL);
- if (r < 0) {
+ r = sd_bus_get_timeout(bus, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ int j;
- if (bus->bus_client)
- bus_remove_match_internal(bus, match);
- }
+ j = sd_event_source_set_time(bus->time_event_source, until);
+ if (j < 0)
+ return j;
}
- return r;
+ r = sd_event_source_set_enabled(bus->time_event_source, r > 0);
+ if (r < 0)
+ return r;
+
+ return 1;
}
-int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
- int r = 0, q = 0;
+static int quit_callback(sd_event_source *event, void *userdata) {
+ sd_bus *bus = userdata;
- if (!bus)
- return -EINVAL;
- if (!match)
- return -EINVAL;
+ assert(event);
- if (bus->bus_client)
- r = bus_remove_match_internal(bus, match);
+ sd_bus_flush(bus);
- if (callback) {
- bus->match_callbacks_modified = true;
- q = bus_match_remove(&bus->match_callbacks, match, callback, userdata);
- }
+ return 1;
+}
+
+static int attach_io_events(sd_bus *bus) {
+ int r;
+
+ assert(bus);
+
+ if (bus->input_fd < 0)
+ return 0;
+
+ if (!bus->event)
+ 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);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority);
+ } else
+ r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd);
if (r < 0)
return r;
- return q;
+
+ if (bus->output_fd != bus->input_fd) {
+ 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);
+ if (r < 0)
+ return r;
+
+ r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority);
+ } else
+ r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd);
+
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
}
-int sd_bus_emit_signal(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const char *member,
- const char *types, ...) {
+static void detach_io_events(sd_bus *bus) {
+ assert(bus);
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- va_list ap;
+ 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) {
+ 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);
+ }
+}
+
+_public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) {
int r;
- if (!bus)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(!bus->event, -EBUSY);
+
+ assert(!bus->input_io_event_source);
+ assert(!bus->output_io_event_source);
+ assert(!bus->time_event_source);
+
+ if (event)
+ bus->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&bus->event);
+ if (r < 0)
+ return r;
+ }
- r = sd_bus_message_new_signal(bus, path, interface, member, &m);
+ bus->event_priority = priority;
+
+ r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source);
if (r < 0)
- return r;
+ goto fail;
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
+ r = sd_event_source_set_priority(bus->time_event_source, priority);
if (r < 0)
- return r;
+ goto fail;
+
+ r = sd_event_add_exit(bus->event, quit_callback, bus, &bus->quit_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = attach_io_events(bus);
+ if (r < 0)
+ goto fail;
- return sd_bus_send(bus, m, NULL);
+ return 0;
+
+fail:
+ sd_bus_detach_event(bus);
+ return r;
}
-int sd_bus_call_method(
- sd_bus *bus,
- const char *destination,
- const char *path,
- const char *interface,
- const char *member,
- sd_bus_error *error,
- sd_bus_message **reply,
- const char *types, ...) {
+_public_ int sd_bus_detach_event(sd_bus *bus) {
+ assert_return(bus, -EINVAL);
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- va_list ap;
- int r;
+ if (!bus->event)
+ return 0;
- if (!bus)
- return -EINVAL;
+ detach_io_events(bus);
- r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m);
- if (r < 0)
- return r;
+ 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);
+ }
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
- if (r < 0)
- return r;
+ 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);
+ }
- return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply);
+ if (bus->event)
+ bus->event = sd_event_unref(bus->event);
+
+ return 1;
}
-int sd_bus_reply_method_return(
- sd_bus *bus,
- sd_bus_message *call,
- const char *types, ...) {
+_public_ sd_event* sd_bus_get_event(sd_bus *bus) {
+ assert_return(bus, NULL);
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- va_list ap;
+ 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;
- if (!bus)
- return -EINVAL;
- if (!call)
- return -EINVAL;
- if (!call->sealed)
- return -EPERM;
- if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
+ assert(bus_open);
+ assert(default_bus);
- if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
+ if (!ret)
+ return !!*default_bus;
+
+ if (*default_bus) {
+ *ret = sd_bus_ref(*default_bus);
return 0;
+ }
- r = sd_bus_message_new_method_return(bus, call, &m);
+ r = bus_open(&b);
if (r < 0)
return r;
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
+ 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_local 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_local 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;
+}
+
+_public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
+ sd_bus_creds *c;
+ pid_t pid = 0;
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);
+ assert_return(ret, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(!bus->is_kernel, -ENOTSUP);
+
+ if (!bus->ucred_valid && !isempty(bus->label))
+ return -ENODATA;
+
+ c = bus_creds_new();
+ if (!c)
+ return -ENOMEM;
+
+ if (bus->ucred_valid) {
+ pid = c->pid = bus->ucred.pid;
+ c->uid = bus->ucred.uid;
+ c->gid = bus->ucred.gid;
+
+ c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask;
+ }
+
+ if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) {
+ c->label = strdup(bus->label);
+ if (!c->label) {
+ sd_bus_creds_unref(c);
+ return -ENOMEM;
+ }
+
+ c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
+ }
+
+ r = bus_creds_add_more(c, mask, pid, 0);
if (r < 0)
return r;
- return sd_bus_send(bus, m, NULL);
+ *ret = c;
+ return 0;
}
-int sd_bus_reply_method_error(
- sd_bus *bus,
- sd_bus_message *call,
- const sd_bus_error *e) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+_public_ int sd_bus_try_close(sd_bus *bus) {
int r;
- if (!bus)
- return -EINVAL;
- if (!call)
- return -EINVAL;
- if (!call->sealed)
- return -EPERM;
- if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (!sd_bus_error_is_set(e))
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(bus->is_kernel, -ENOTSUP);
- if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
- return 0;
+ if (bus->rqueue_size > 0)
+ return -EBUSY;
- r = sd_bus_message_new_method_error(bus, call, e, &m);
+ if (bus->wqueue_size > 0)
+ return -EBUSY;
+
+ r = bus_kernel_try_close(bus);
if (r < 0)
return r;
- return sd_bus_send(bus, m, NULL);
+ sd_bus_close(bus);
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff