diff options
Diffstat (limited to 'src/bus-driverd/bus-driverd.c')
| -rw-r--r-- | src/bus-driverd/bus-driverd.c | 955 |
1 files changed, 0 insertions, 955 deletions
diff --git a/src/bus-driverd/bus-driverd.c b/src/bus-driverd/bus-driverd.c deleted file mode 100644 index 0b5c9b51f3..0000000000 --- a/src/bus-driverd/bus-driverd.c +++ /dev/null @@ -1,955 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Daniel Mack - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <stdlib.h> -#include <stdbool.h> -#include <unistd.h> -#include <getopt.h> -#include <locale.h> -#include <string.h> -#include <poll.h> -#include <netdb.h> -#include <sys/socket.h> -#include <sys/un.h> -#include <sys/timex.h> -#include <sys/utsname.h> - -#include "kdbus.h" -#include "sd-bus.h" -#include "bus-internal.h" -#include "sd-daemon.h" -#include "sd-event.h" -#include "event-util.h" -#include "bus-util.h" -#include "bus-error.h" -#include "bus-message.h" -#include "bus-kernel.h" -#include "socket-util.h" -#include "util.h" -#include "build.h" -#include "strv.h" -#include "sd-id128.h" -#include "async.h" -#include "hashmap.h" -#include "def.h" -#include "unit-name.h" -#include "bus-control.h" -#include "cgroup-util.h" - -#define CLIENTS_MAX 1024 -#define MATCHES_MAX 1024 - -typedef struct Match Match; -typedef struct Client Client; -typedef struct Context Context; - -struct Match { - Client *client; - char *match; - uint64_t cookie; - LIST_FIELDS(Match, matches); -}; - -struct Client { - Context *context; - uint64_t id; - uint64_t next_cookie; - Hashmap *matches; - unsigned n_matches; - char *watch; -}; - -struct Context { - sd_bus *bus; - sd_event *event; - Hashmap *clients; -}; - -static void match_free(Match *m) { - - if (!m) - return; - - if (m->client) { - Match *first; - - first = hashmap_get(m->client->matches, m->match); - LIST_REMOVE(matches, first, m); - if (first) - assert_se(hashmap_replace(m->client->matches, first->match, first) >= 0); - else - hashmap_remove(m->client->matches, m->match); - - m->client->n_matches--; - } - - free(m->match); - free(m); -} - -static int match_new(Client *c, struct bus_match_component *components, unsigned n_components, Match **_m) { - Match *m, *first; - int r; - - assert(c); - assert(_m); - - r = hashmap_ensure_allocated(&c->matches, string_hash_func, string_compare_func); - if (r < 0) - return r; - - m = new0(Match, 1); - if (!m) - return -ENOMEM; - - m->match = bus_match_to_string(components, n_components); - if (!m->match) { - r = -ENOMEM; - goto fail; - } - - m->cookie = ++c->next_cookie; - - first = hashmap_get(c->matches, m->match); - LIST_PREPEND(matches, first, m); - r = hashmap_replace(c->matches, m->match, first); - if (r < 0) { - LIST_REMOVE(matches, first, m); - goto fail; - } - - m->client = c; - c->n_matches++; - - *_m = m; - m = NULL; - - return 0; - -fail: - match_free(m); - return r; -} - -static int on_name_owner_changed(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error); - -static void client_free(Client *c) { - Match *m; - - if (!c) - return; - - if (c->context) { - if (c->watch) - sd_bus_remove_match(c->context->bus, c->watch, on_name_owner_changed, c); - - assert_se(hashmap_remove(c->context->clients, &c->id) == c); - } - - while ((m = hashmap_first(c->matches))) - match_free(m); - - hashmap_free(c->matches); - free(c->watch); - - free(c); -} - -static int on_name_owner_changed(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - Client *c = userdata; - - assert(bus); - assert(m); - - client_free(c); - return 0; -} - -static int client_acquire(Context *context, uint64_t id, Client **_c) { - char *watch = NULL; - Client *c; - int r; - - assert(context); - assert(_c); - - c = hashmap_get(context->clients, &id); - if (c) { - *_c = c; - return 0; - } - - if (hashmap_size(context->clients) >= CLIENTS_MAX) - return -ENOBUFS; - - r = hashmap_ensure_allocated(&context->clients, uint64_hash_func, uint64_compare_func); - if (r < 0) - return r; - - c = new0(Client, 1); - if (!c) - return -ENOMEM; - - c->id = id; - - r = hashmap_put(context->clients, &c->id, c); - if (r < 0) - goto fail; - - c->context = context; - - if (asprintf(&watch, - "type='signal'," - "sender='org.freedesktop.DBus'," - "path='/org/freedesktop/DBus'," - "interface='org.freedesktop.DBus'," - "member='NameOwnerChanged'," - "arg0=':1.%llu'", (unsigned long long) id) < 0) { - r = -ENOMEM; - goto fail; - } - - r = sd_bus_add_match(context->bus, watch, on_name_owner_changed, c); - if (r < 0) { - free(watch); - goto fail; - } - - c->watch = watch; - - *_c = c; - return 0; - -fail: - client_free(c); - return r; -} - -static int driver_add_match(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { - - struct bus_match_component *components = NULL; - Context *context = userdata; - unsigned n_components = 0; - Match *m = NULL; - Client *c = NULL; - char *arg0; - uint64_t id; - int r; - - assert(bus); - assert(message); - assert(context); - - r = sd_bus_message_read(message, "s", &arg0); - if (r < 0) - return r; - - r = bus_kernel_parse_unique_name(message->sender, &id); - if (r < 0) - return r; - - r = client_acquire(context, id, &c); - if (r == -ENOBUFS) - return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Reached limit of %u clients", CLIENTS_MAX); - if (r < 0) - return r; - - if (c->n_matches >= MATCHES_MAX) { - r = sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Reached limit of %u matches per client", MATCHES_MAX); - goto fail; - } - - r = bus_match_parse(arg0, &components, &n_components); - if (r < 0) { - r = sd_bus_error_setf(error, SD_BUS_ERROR_MATCH_RULE_INVALID, "Match rule \"%s\" is not valid", arg0); - goto fail; - } - - r = match_new(c, components, n_components, &m); - if (r < 0) - goto fail; - - r = bus_add_match_internal_kernel(bus, id, components, n_components, m->cookie); - if (r < 0) - goto fail; - - bus_match_parse_free(components, n_components); - - return sd_bus_reply_method_return(message, NULL); - -fail: - bus_match_parse_free(components, n_components); - - match_free(m); - - if (c->n_matches <= 0) - client_free(c); - - return r; -} - -static int driver_remove_match(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { - - struct bus_match_component *components = NULL; - _cleanup_free_ char *normalized = NULL; - Context *context = userdata; - unsigned n_components = 0; - Client *c = NULL; - Match *m = NULL; - char *arg0; - uint64_t id; - int r; - - assert(bus); - assert(message); - assert(context); - - r = sd_bus_message_read(message, "s", &arg0); - if (r < 0) - return r; - - r = bus_kernel_parse_unique_name(message->sender, &id); - if (r < 0) - return r; - - c = hashmap_get(context->clients, &id); - if (!c) - return sd_bus_error_setf(error, SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "You have not registered any matches."); - - r = bus_match_parse(arg0, &components, &n_components); - if (r < 0) { - r = sd_bus_error_setf(error, SD_BUS_ERROR_MATCH_RULE_INVALID, "Match rule \"%s\" is not valid", arg0); - goto finish; - } - - normalized = bus_match_to_string(components, n_components); - if (!normalized) { - r = -ENOMEM; - goto finish; - } - - m = hashmap_get(c->matches, normalized); - if (!m) { - r = sd_bus_error_setf(error, SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule \"%s\" not found.", normalized); - goto finish; - } - - bus_remove_match_internal_kernel(bus, id, m->cookie); - match_free(m); - - r = sd_bus_reply_method_return(message, NULL); - -finish: - bus_match_parse_free(components, n_components); - - if (c->n_matches <= 0) - client_free(c); - - return r; -} - -static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL; - int r; - - assert(bus); - assert(name); - assert(_creds); - - assert_return(service_name_is_valid(name), -EINVAL); - - r = sd_bus_get_owner(bus, name, mask, &c); - if (r == -ESRCH || 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; -} - - -static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) { - const char *name; - int r; - - assert(bus); - assert(m); - assert(_creds); - - r = sd_bus_message_read(m, "s", &name); - if (r < 0) - return r; - - return get_creds_by_name(bus, name, mask, _creds, error); -} - -static int driver_get_security_context(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - int r; - - r = get_creds_by_message(bus, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, error); - if (r < 0) - return r; - - r = sd_bus_message_new_method_return(m, &reply); - if (r < 0) - return r; - - r = sd_bus_message_append_array(reply, 'y', creds->label, strlen(creds->label)); - if (r < 0) - return r; - - return sd_bus_send(bus, reply, NULL); -} - -static int driver_get_pid(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - int r; - - r = get_creds_by_message(bus, m, SD_BUS_CREDS_PID, &creds, error); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, "u", (uint32_t) creds->pid); -} - -static int driver_get_user(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - int r; - - r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, error); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, "u", (uint32_t) creds->uid); -} - -static int driver_get_name_owner(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; - const char *name; - int r; - - r = sd_bus_message_read(m, "s", &name); - if (r < 0) - return r; - - /* Here's a special exception for compatibility with dbus1: - * the bus name of the driver is owned by itself, not by a - * unique ID. */ - if (streq(name, "org.freedesktop.DBus")) - return sd_bus_reply_method_return(m, "s", "org.freedesktop.DBus"); - - r = get_creds_by_name(bus, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, error); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, "s", creds->unique_name); -} - -static int driver_get_id(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - sd_id128_t server_id; - char buf[SD_ID128_STRING_MAX]; - int r; - - r = sd_bus_get_server_id(bus, &server_id); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, "s", sd_id128_to_string(server_id, buf)); -} - -static int driver_hello(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - return sd_bus_reply_method_return(m, "s", m->sender); -} - -static int return_strv(sd_bus *bus, sd_bus_message *m, char **l) { - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - int r; - - r = sd_bus_message_new_method_return(m, &reply); - if (r < 0) - return r; - - r = sd_bus_message_append_strv(reply, l); - if (r < 0) - return r; - - return sd_bus_send(bus, reply, NULL); -} - -static int driver_list_names(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_strv_free_ char **names = NULL; - int r; - - r = sd_bus_list_names(bus, &names, NULL); - if (r < 0) - return r; - - /* Let's sort the names list to make it stable */ - strv_sort(names); - - return return_strv(bus, m, names); -} - -static int driver_list_activatable_names(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_strv_free_ char **names = NULL; - int r; - - r = sd_bus_list_names(bus, NULL, &names); - if (r < 0) - return r; - - /* Let's sort the names list to make it stable */ - strv_sort(names); - - return return_strv(bus, m, names); -} - -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_consume(&owners, n); - if (r < 0) - return r; - } - - r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset); - if (r < 0) - return -errno; - - return return_strv(bus, m, owners); -} - -static int driver_name_has_owner(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - const char *name; - int r; - - 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, 0, NULL); - if (r < 0 && r != -ESRCH && r != -ENXIO) - return r; - - return sd_bus_reply_method_return(m, "b", r >= 0); -} - -static int driver_request_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - struct kdbus_cmd_name *n; - uint32_t flags; - size_t size, l; - uint64_t id; - const char *name; - int r; - - r = sd_bus_message_read(m, "su", &name, &flags); - if (r < 0) - return r; - - assert_return(service_name_is_valid(name), -EINVAL); - assert_return((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) == 0, -EINVAL); - - l = strlen(name); - size = offsetof(struct kdbus_cmd_name, name) + l + 1; - n = alloca0(size); - n->size = size; - memcpy(n->name, name, l+1); - kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags); - - /* This function is open-coded because we request the name 'on behalf' - * of the requesting connection */ - r = bus_kernel_parse_unique_name(m->sender, &id); - if (r < 0) - return r; - - n->owner_id = id; - - r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n); - if (r < 0) { - if (errno == EEXIST) - return sd_bus_reply_method_return(m, "u", BUS_NAME_EXISTS); - if (errno == EALREADY) - return sd_bus_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER); - - return -errno; - } - - if (n->flags & KDBUS_NAME_IN_QUEUE) - return sd_bus_reply_method_return(m, "u", BUS_NAME_IN_QUEUE); - - return sd_bus_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER); -} - -static int driver_release_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - struct kdbus_cmd_name *n; - const char *name; - size_t l, size; - uint64_t id; - int r; - - r = sd_bus_message_read(m, "s", &name); - if (r < 0) - return r; - - assert_return(service_name_is_valid(name), -EINVAL); - - l = strlen(name); - size = offsetof(struct kdbus_cmd_name, name) + l + 1; - n = alloca0(size); - n->size = size; - memcpy(n->name, name, l+1); - - /* This function is open-coded because we request the name 'on behalf' - * of the requesting connection */ - r = bus_kernel_parse_unique_name(m->sender, &id); - if (r < 0) - return r; - - n->owner_id = id; - - r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n); - if (r < 0) { - if (errno == ESRCH) - return sd_bus_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT); - if (errno == EADDRINUSE) - return sd_bus_reply_method_return(m, "u", BUS_NAME_NOT_OWNER); - return -errno; - } - - return sd_bus_reply_method_return(m, "u", BUS_NAME_RELEASED); -} - -static int driver_start_service_by_name(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - _cleanup_strv_free_ char **t = NULL; - _cleanup_free_ char *path = NULL; - uint32_t flags; - char *name, *u; - int r; - - r = sd_bus_message_read(m, "su", &name, &flags); - if (r < 0) - return r; - - assert_return(service_name_is_valid(name), -EINVAL); - assert_return(flags == 0, -ENOTSUP); - - r = sd_bus_get_owner(bus, name, 0, NULL); - if (r >= 0) - return sd_bus_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING); - if (r != -ESRCH) - return r; - - u = strappenda(name, ".busname"); - - path = unit_dbus_path_from_name(u); - if (!path) - return -ENOMEM; - - r = sd_bus_get_property_strv( - bus, - "org.freedesktop.systemd1", - path, - "org.freedesktop.systemd1.Unit", - "Triggers", - error, - &t); - if (r < 0) - return r; - - if (!t || !t[0] || t[1]) - return sd_bus_error_setf(error, SD_BUS_ERROR_SERVICE_UNKNOWN, "Bus name %s not found.", name); - - r = sd_bus_call_method( - bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "StartUnit", - error, - &reply, - "ss", - t[0], - "replace"); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS); -} - -static int driver_update_environment(sd_bus*bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - _cleanup_bus_message_unref_ sd_bus_message *msg = NULL; - _cleanup_strv_free_ char **args = NULL; - int r; - - r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}"); - if (r < 0) - return r; - - while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) { - _cleanup_free_ char *s = NULL; - const char *key; - const char *value; - - r = sd_bus_message_read(m, "ss", &key, &value); - if (r < 0) - return r; - - s = strjoin(key, "=", value, NULL); - if (!s) - return ENOMEM; - - r = strv_extend(&args, s); - if (r < 0) - return r; - - r = sd_bus_message_exit_container(m); - if (r < 0) - return r; - } - - r = sd_bus_message_exit_container(m); - if (r < 0) - return r; - - if (!args) - return -EINVAL; - - r = sd_bus_message_new_method_call( - bus, - &msg, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "SetEnvironment"); - if (r < 0) - return r; - - r = sd_bus_message_append_strv(msg, args); - if (r < 0) - return r; - - r = sd_bus_call(bus, msg, 0, NULL, NULL); - if (r < 0) - return r; - - return sd_bus_reply_method_return(m, NULL); -} - -static int driver_unsupported(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) { - return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m)); -} - -static const sd_bus_vtable driver_vtable[] = { - SD_BUS_VTABLE_START(0), - SD_BUS_METHOD("AddMatch", "s", NULL, driver_add_match, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("RemoveMatch", "s", NULL, driver_remove_match, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("GetConnectionSELinuxSecurityContext", "s", "ay", driver_get_security_context, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("GetConnectionUnixProcessID", "s", "u", driver_get_pid, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("GetConnectionUnixUser", "s", "u", driver_get_user, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("GetId", NULL, "s", driver_get_id, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("GetNameOwner", "s", "s", driver_get_name_owner, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("Hello", NULL, "s", driver_hello, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("ListActivatableNames", NULL, "as", driver_list_activatable_names, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("ListNames", NULL, "as", driver_list_names, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("ListQueuedOwners", "s", "as", driver_list_queued_owners, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("NameHasOwner", "s", "b", driver_name_has_owner, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("ReleaseName", "s", "u", driver_release_name, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("ReloadConfig", NULL, NULL, driver_unsupported, SD_BUS_VTABLE_DEPRECATED), - SD_BUS_METHOD("RequestName", "su", "u", driver_request_name, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("StartServiceByName", "su", "u", driver_start_service_by_name, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("UpdateActivationEnvironment", "a{ss}", NULL, driver_update_environment, 0), - SD_BUS_SIGNAL("NameAcquired", "s", SD_BUS_VTABLE_DEPRECATED), - SD_BUS_SIGNAL("NameLost", "s", SD_BUS_VTABLE_DEPRECATED), - SD_BUS_SIGNAL("NameOwnerChanged", "sss", 0), - SD_BUS_VTABLE_END -}; - -static int find_object( - sd_bus *bus, - const char *path, - const char *interface, - void *userdata, - void **ret_found, - sd_bus_error *ret_error) { - - /* We support the driver interface on exactly two different - * paths: the root and the entry point object. This is a bit - * different from the original dbus-daemon which supported it - * on any path. */ - - if (streq_ptr(path, "/")) - return 1; - - if (streq_ptr(path, "/org/freedesktop/DBus")) - return 1; - - return 0; -} - -static int node_enumerator( - sd_bus *bus, - const char *path, - void *userdata, - char ***ret_nodes, - sd_bus_error *ret_error) { - - char **l; - - l = strv_new("/", "/org/freedesktop/DBus", NULL); - if (!l) - return -ENOMEM; - - *ret_nodes = l; - return 0; -} - -static int connect_bus(Context *c) { - int r; - - assert(c); - - r = sd_bus_default(&c->bus); - if (r < 0) { - log_error("Failed to create bus: %s", strerror(-r)); - return r; - } - - if (!c->bus->is_kernel) { - log_error("Not running on kdbus"); - return -EPERM; - } - - r = sd_bus_add_fallback_vtable(c->bus, "/", "org.freedesktop.DBus", driver_vtable, find_object, c); - if (r < 0) { - log_error("Failed to add manager object vtable: %s", strerror(-r)); - return r; - } - - r = sd_bus_add_node_enumerator(c->bus, "/", node_enumerator, c); - if (r < 0) { - log_error("Failed to add node enumerator: %s", strerror(-r)); - return r; - } - - r = sd_bus_request_name(c->bus, "org.freedesktop.DBus", 0); - if (r < 0) { - log_error("Unable to request name: %s", strerror(-r)); - return r; - } - - r = sd_bus_attach_event(c->bus, c->event, 0); - if (r < 0) { - log_error("Error while adding bus to event loop: %s", strerror(-r)); - return r; - } - - return 0; -} - -static bool check_idle(void *userdata) { - Context *c = userdata; - assert(c); - - return hashmap_isempty(c->clients); -} - -int main(int argc, char *argv[]) { - Context context = {}; - Client *c; - int r; - - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); - - if (argc != 1) { - log_error("This program takes no arguments."); - r = -EINVAL; - goto finish; - } - - r = sd_event_default(&context.event); - if (r < 0) { - log_error("Failed to allocate event loop: %s", strerror(-r)); - goto finish; - } - - sd_event_set_watchdog(context.event, true); - - r = connect_bus(&context); - if (r < 0) - goto finish; - - r = bus_event_loop_with_idle(context.event, context.bus, "org.freedesktop.DBus", DEFAULT_EXIT_USEC, check_idle, &context); - if (r < 0) { - log_error("Failed to run event loop: %s", strerror(-r)); - goto finish; - } - -finish: - while ((c = hashmap_first(context.clients))) - client_free(c); - - sd_bus_unref(context.bus); - sd_event_unref(context.event); - - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} |