static int get_creds(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
const char *name;
int r;
assert(bus);
assert(m);
assert(_creds);
r = sd_bus_message_read(m, "s", &name);
if (r < 0)
return r;
assert_return(service_name_is_valid(name), -EINVAL);
r = sd_bus_get_owner(bus, name, mask, &c);
if (r == -ENOENT || r == -ENXIO)
return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
if (r < 0)
return r;
if ((c->mask & mask) != mask)
return -ENOTSUP;
*_creds = c;
c = NULL;
return 0;
}
_public_ int sd_bus_match_signal_async(
sd_bus *bus,
sd_bus_slot **ret,
const char *sender,
const char *path,
const char *interface,
const char *member,
sd_bus_message_handler_t callback,
sd_bus_message_handler_t install_callback,
void *userdata) {
const char *expression;
assert_return(bus, -EINVAL);
assert_return(bus = bus_resolve(bus), -ENOPKG);
assert_return(!bus_pid_changed(bus), -ECHILD);
assert_return(!sender || service_name_is_valid(sender), -EINVAL);
assert_return(!path || object_path_is_valid(path), -EINVAL);
assert_return(!interface || interface_name_is_valid(interface), -EINVAL);
assert_return(!member || member_name_is_valid(member), -EINVAL);
expression = make_expression(sender, path, interface, member);
return sd_bus_add_match_async(bus, ret, expression, callback, install_callback, userdata);
}
_public_ int sd_bus_track_add_name(sd_bus_track *track, const char *name) {
_cleanup_bus_slot_unref_ sd_bus_slot *slot = NULL;
_cleanup_free_ char *n = NULL;
const char *match;
int r;
assert_return(track, -EINVAL);
assert_return(service_name_is_valid(name), -EINVAL);
r = hashmap_ensure_allocated(&track->names, &string_hash_ops);
if (r < 0)
return r;
n = strdup(name);
if (!n)
return -ENOMEM;
/* First, subscribe to this name */
match = MATCH_FOR_NAME(n);
r = sd_bus_add_match(track->bus, &slot, match, on_name_owner_changed, track);
if (r < 0)
return r;
r = hashmap_put(track->names, n, slot);
if (r == -EEXIST)
return 0;
if (r < 0)
return r;
/* Second, check if it is currently existing, or maybe
* doesn't, or maybe disappeared already. */
r = sd_bus_get_name_creds(track->bus, n, 0, NULL);
if (r < 0) {
hashmap_remove(track->names, n);
return r;
}
n = NULL;
slot = NULL;
bus_track_remove_from_queue(track);
track->modified = true;
return 1;
}
static int busname_verify(BusName *n) {
char *e;
assert(n);
if (UNIT(n)->load_state != UNIT_LOADED)
return 0;
if (!service_name_is_valid(n->name)) {
log_unit_error(UNIT(n)->id, "%s's Name= setting is not a valid service name Refusing.", UNIT(n)->id);
return -EINVAL;
}
e = strjoina(n->name, ".busname");
if (!unit_has_name(UNIT(n), e)) {
log_unit_error(UNIT(n)->id, "%s's Name= setting doesn't match unit name. Refusing.", UNIT(n)->id);
return -EINVAL;
}
return 0;
}
static int driver_list_queued_owners(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
struct kdbus_cmd_name_list cmd = {};
struct kdbus_name_list *name_list;
struct kdbus_cmd_name *name;
_cleanup_strv_free_ char **owners = NULL;
char *arg0;
int r;
r = sd_bus_message_read(m, "s", &arg0);
if (r < 0)
return r;
assert_return(service_name_is_valid(arg0), -EINVAL);
cmd.flags = KDBUS_NAME_LIST_QUEUED;
r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
if (r < 0)
return -errno;
name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
KDBUS_ITEM_FOREACH(name, name_list, names) {
char *n;
if (name->size <= sizeof(*name))
continue;
if (!streq(name->name, arg0))
continue;
if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0)
return -ENOMEM;
r = strv_push(&owners, n);
if (r < 0) {
free(n);
return -ENOMEM;
}
}
static int add_dbus(const char *path, const char *fname, const char *type) {
_cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
const ConfigTableItem table[] = {
{ "D-BUS Service", "Name", config_parse_string, 0, &name },
{ "D-BUS Service", "Exec", config_parse_string, 0, &exec },
{ "D-BUS Service", "User", config_parse_string, 0, &user },
{ "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
{ },
};
char *p;
int r;
assert(path);
assert(fname);
p = strjoina(path, "/", fname);
r = config_parse(NULL, p, NULL,
"D-BUS Service\0",
config_item_table_lookup, table,
true, false, true, NULL);
if (r < 0)
return r;
if (!name) {
log_warning("Activation file %s lacks name setting, ignoring.", p);
return 0;
}
if (!service_name_is_valid(name)) {
log_warning("Bus service name %s is not valid, ignoring.", name);
return 0;
}
if (streq(name, "org.freedesktop.systemd1")) {
log_debug("Skipping %s, identified as systemd.", p);
return 0;
}
if (service) {
if (!unit_name_is_valid(service, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
log_warning("Unit name %s is not valid, ignoring.", service);
return 0;
}
if (!endswith(service, ".service")) {
log_warning("Bus names can only activate services, ignoring %s.", p);
return 0;
}
} else {
if (streq(exec, "/bin/false") || !exec) {
log_warning("Neither service name nor binary path specified, ignoring %s.", p);
return 0;
}
if (exec[0] != '/') {
log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
return 0;
}
}
return create_dbus_files(p, name, service, exec, user, type);
}
static int add_dbus(const char *path, const char *fname, const char *type) {
_cleanup_free_ char *name = NULL, *exec = NULL, *user = NULL, *service = NULL;
ConfigTableItem table[] = {
{ "D-BUS Service", "Name", config_parse_string, 0, &name },
{ "D-BUS Service", "Exec", config_parse_string, 0, &exec },
{ "D-BUS Service", "User", config_parse_string, 0, &user },
{ "D-BUS Service", "SystemdService", config_parse_string, 0, &service },
};
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *p = NULL;
int r;
assert(path);
assert(fname);
p = strjoin(path, "/", fname, NULL);
if (!p)
return log_oom();
f = fopen(p, "re");
if (!f) {
if (errno == -ENOENT)
return 0;
log_error("Failed to read %s: %m", p);
return -errno;
}
r = config_parse(NULL, p, f, "D-BUS Service\0", config_item_table_lookup, table, true, false, NULL);
if (r < 0)
return r;
if (!name) {
log_warning("Activation file %s lacks name setting, ignoring.", p);
return 0;
}
if (!service_name_is_valid(name)) {
log_warning("Bus service name %s is not valid, ignoring.", name);
return 0;
}
if (streq(name, "org.freedesktop.systemd1")) {
log_debug("Skipping %s, identified as systemd.", p);
return 0;
}
if (service) {
if (!unit_name_is_valid(service, TEMPLATE_INVALID)) {
log_warning("Unit name %s is not valid, ignoring.", service);
return 0;
}
if (!endswith(service, ".service")) {
log_warning("Bus names can only activate services, ignoring %s.", p);
return 0;
}
} else {
if (streq(exec, "/bin/false") || !exec) {
log_warning("Neither service name nor binary path specified, ignoring %s.", p);
return 0;
}
if (exec[0] != '/') {
log_warning("Exec= in %s does not start with an absolute path, ignoring.", p);
return 0;
}
}
return create_dbus_files(p, name, service, exec, user, type);
}
r = sd_bus_message_read(message, "sss", &name, &old, &new);
if (r < 0)
return 0;
bus_track_remove_name_fully(track, name);
return 0;
}
_public_ int sd_bus_track_add_name(sd_bus_track *track, const char *name) {
_cleanup_(track_item_freep) struct track_item *n = NULL;
struct track_item *i;
const char *match;
int r;
assert_return(track, -EINVAL);
assert_return(service_name_is_valid(name), -EINVAL);
i = hashmap_get(track->names, name);
if (i) {
if (track->recursive) {
unsigned k = track->n_ref + 1;
if (k < track->n_ref) /* Check for overflow */
return -EOVERFLOW;
track->n_ref = k;
}
bus_track_remove_from_queue(track);
return 0;
}
static int bus_scope_set_transient_property(
Scope *s,
const char *name,
sd_bus_message *message,
UnitSetPropertiesMode mode,
sd_bus_error *error) {
int r;
assert(s);
assert(name);
assert(message);
if (streq(name, "PIDs")) {
unsigned n = 0;
uint32_t pid;
r = sd_bus_message_enter_container(message, 'a', "u");
if (r < 0)
return r;
while ((r = sd_bus_message_read(message, "u", &pid)) > 0) {
if (pid <= 1)
return -EINVAL;
if (mode != UNIT_CHECK) {
r = unit_watch_pid(UNIT(s), pid);
if (r < 0 && r != -EEXIST)
return r;
}
n++;
}
if (r < 0)
return r;
r = sd_bus_message_exit_container(message);
if (r < 0)
return r;
if (n <= 0)
return -EINVAL;
return 1;
} else if (streq(name, "Controller")) {
const char *controller;
char *c;
r = sd_bus_message_read(message, "s", &controller);
if (r < 0)
return r;
if (!isempty(controller) && !service_name_is_valid(controller))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
if (mode != UNIT_CHECK) {
if (isempty(controller))
c = NULL;
else {
c = strdup(controller);
if (!c)
return -ENOMEM;
}
free(s->controller);
s->controller = c;
}
return 1;
} else if (streq(name, "TimeoutStopUSec")) {
if (mode != UNIT_CHECK) {
r = sd_bus_message_read(message, "t", &s->timeout_stop_usec);
if (r < 0)
return r;
unit_write_drop_in_format(UNIT(s), mode, name, "[Scope]\nTimeoutStopSec=%lluus\n", (unsigned long long) s->timeout_stop_usec);
} else {
r = sd_bus_message_skip(message, "t");
if (r < 0)
return r;
}
return 1;
}
return 0;
}
static int bus_scope_set_transient_property(
Scope *s,
const char *name,
sd_bus_message *message,
UnitWriteFlags flags,
sd_bus_error *error) {
int r;
assert(s);
assert(name);
assert(message);
flags |= UNIT_PRIVATE;
if (streq(name, "TimeoutStopUSec"))
return bus_set_transient_usec(UNIT(s), name, &s->timeout_stop_usec, message, flags, error);
if (streq(name, "PIDs")) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
unsigned n = 0;
r = sd_bus_message_enter_container(message, 'a', "u");
if (r < 0)
return r;
for (;;) {
uint32_t upid;
pid_t pid;
r = sd_bus_message_read(message, "u", &upid);
if (r < 0)
return r;
if (r == 0)
break;
if (upid == 0) {
if (!creds) {
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
if (r < 0)
return r;
}
r = sd_bus_creds_get_pid(creds, &pid);
if (r < 0)
return r;
} else
pid = (uid_t) upid;
r = unit_pid_attachable(UNIT(s), pid, error);
if (r < 0)
return r;
if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
r = unit_watch_pid(UNIT(s), pid);
if (r < 0 && r != -EEXIST)
return r;
}
n++;
}
r = sd_bus_message_exit_container(message);
if (r < 0)
return r;
if (n <= 0)
return -EINVAL;
return 1;
} else if (streq(name, "Controller")) {
const char *controller;
/* We can't support direct connections with this, as direct connections know no service or unique name
* concept, but the Controller field stores exactly that. */
if (sd_bus_message_get_bus(message) != UNIT(s)->manager->api_bus)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Sorry, Controller= logic only supported via the bus.");
r = sd_bus_message_read(message, "s", &controller);
if (r < 0)
return r;
if (!isempty(controller) && !service_name_is_valid(controller))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
r = free_and_strdup(&s->controller, empty_to_null(controller));
if (r < 0)
return r;
}
return 1;
}
return 0;
}
