+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- 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 <sys/epoll.h>
-#include <errno.h>
-#include <unistd.h>
-
-#include "sd-bus.h"
-#include "log.h"
-#include "strv.h"
-#include "mkdir.h"
-#include "missing.h"
-#include "dbus-unit.h"
-#include "dbus-job.h"
-#include "dbus-manager.h"
-#include "dbus-execute.h"
-#include "dbus-kill.h"
-#include "dbus-cgroup.h"
-#include "special.h"
-#include "dbus.h"
-#include "bus-util.h"
-#include "bus-error.h"
-#include "bus-common-errors.h"
-#include "strxcpyx.h"
-#include "bus-internal.h"
-#include "selinux-access.h"
-
-#define CONNECTIONS_MAX 4096
-
-static void destroy_bus(Manager *m, sd_bus **bus);
-
-int bus_send_queued_message(Manager *m) {
- int r;
-
- assert(m);
-
- if (!m->queued_message)
- return 0;
-
- assert(m->queued_message_bus);
-
- /* If we cannot get rid of this message we won't dispatch any
- * D-Bus messages, so that we won't end up wanting to queue
- * another message. */
-
- r = sd_bus_send(m->queued_message_bus, m->queued_message, NULL);
- if (r < 0)
- log_warning_errno(r, "Failed to send queued message: %m");
-
- m->queued_message = sd_bus_message_unref(m->queued_message);
- m->queued_message_bus = sd_bus_unref(m->queued_message_bus);
-
- return 0;
-}
-
-static int signal_agent_released(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- Manager *m = userdata;
- const char *cgroup;
- int r;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "s", &cgroup);
- if (r < 0) {
- bus_log_parse_error(r);
- return 0;
- }
-
- manager_notify_cgroup_empty(m, cgroup);
-
- /* only forward to system bus if running as system instance */
- if (m->running_as != SYSTEMD_SYSTEM || !m->system_bus)
- return 0;
-
- r = sd_bus_message_rewind(message, 1);
- if (r < 0)
- goto exit;
-
- r = sd_bus_send(m->system_bus, message, NULL);
-
-exit:
- if (r < 0)
- log_warning_errno(r, "Failed to forward Released message: %m");
- return 0;
-}
-
-static int signal_disconnected(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- Manager *m = userdata;
-
- assert(bus);
- assert(message);
- assert(m);
-
- if (bus == m->api_bus)
- destroy_bus(m, &m->api_bus);
- if (bus == m->system_bus)
- destroy_bus(m, &m->system_bus);
- if (set_remove(m->private_buses, bus)) {
- log_debug("Got disconnect on private connection.");
- destroy_bus(m, &bus);
- }
-
- return 0;
-}
-
-static int signal_name_owner_changed(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- const char *name, *old_owner, *new_owner;
- Manager *m = userdata;
- int r;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner);
- if (r < 0) {
- bus_log_parse_error(r);
- return 0;
- }
-
- manager_dispatch_bus_name_owner_changed(
- m, name,
- isempty(old_owner) ? NULL : old_owner,
- isempty(new_owner) ? NULL : new_owner);
-
- return 0;
-}
-
-static int signal_activation_request(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- Manager *m = userdata;
- const char *name;
- Unit *u;
- int r;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "s", &name);
- if (r < 0) {
- bus_log_parse_error(r);
- return 0;
- }
-
- if (manager_unit_inactive_or_pending(m, SPECIAL_DBUS_SERVICE) ||
- manager_unit_inactive_or_pending(m, SPECIAL_DBUS_SOCKET)) {
- r = sd_bus_error_setf(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down.");
- goto failed;
- }
-
- r = manager_load_unit(m, name, NULL, &error, &u);
- if (r < 0)
- goto failed;
-
- if (u->refuse_manual_start) {
- r = sd_bus_error_setf(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, %s may be requested by dependency only.", u->id);
- goto failed;
- }
-
- r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
- if (r < 0)
- goto failed;
-
- /* Successfully queued, that's it for us */
- return 0;
-
-failed:
- if (!sd_bus_error_is_set(&error))
- sd_bus_error_set_errno(&error, r);
-
- log_debug("D-Bus activation failed for %s: %s", name, bus_error_message(&error, r));
-
- r = sd_bus_message_new_signal(bus, &reply, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure");
- if (r < 0) {
- bus_log_create_error(r);
- return 0;
- }
-
- r = sd_bus_message_append(reply, "sss", name, error.name, error.message);
- if (r < 0) {
- bus_log_create_error(r);
- return 0;
- }
-
- r = sd_bus_send_to(bus, reply, "org.freedesktop.DBus", NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to respond with to bus activation request: %m");
-
- return 0;
-}
-
-#ifdef HAVE_SELINUX
-static int mac_selinux_filter(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- Manager *m = userdata;
- const char *verb, *path;
- Unit *u = NULL;
- Job *j;
- int r;
-
- assert(bus);
- assert(message);
-
- /* Our own method calls are all protected individually with
- * selinux checks, but the built-in interfaces need to be
- * protected too. */
-
- if (sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Set"))
- verb = "reload";
- else if (sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", NULL) ||
- sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Properties", NULL) ||
- sd_bus_message_is_method_call(message, "org.freedesktop.DBus.ObjectManager", NULL) ||
- sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Peer", NULL))
- verb = "status";
- else
- return 0;
-
- path = sd_bus_message_get_path(message);
-
- if (object_path_startswith("/org/freedesktop/systemd1", path)) {
-
- r = mac_selinux_access_check(message, verb, error);
- if (r < 0)
- return r;
-
- return 0;
- }
-
- if (streq_ptr(path, "/org/freedesktop/systemd1/unit/self")) {
- _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
- pid_t pid;
-
- r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
- if (r < 0)
- return 0;
-
- r = sd_bus_creds_get_pid(creds, &pid);
- if (r < 0)
- return 0;
-
- u = manager_get_unit_by_pid(m, pid);
- } else {
- r = manager_get_job_from_dbus_path(m, path, &j);
- if (r >= 0)
- u = j->unit;
- else
- manager_load_unit_from_dbus_path(m, path, NULL, &u);
- }
-
- if (!u)
- return 0;
-
- r = mac_selinux_unit_access_check(u, message, verb, error);
- if (r < 0)
- return r;
-
- return 0;
-}
-#endif
-
-static int bus_job_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- Job *j;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = manager_get_job_from_dbus_path(m, path, &j);
- if (r < 0)
- return 0;
-
- *found = j;
- return 1;
-}
-
-static int find_unit(Manager *m, sd_bus *bus, const char *path, Unit **unit, sd_bus_error *error) {
- Unit *u;
- int r;
-
- assert(m);
- assert(bus);
- assert(path);
-
- if (streq_ptr(path, "/org/freedesktop/systemd1/unit/self")) {
- _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
- sd_bus_message *message;
- pid_t pid;
-
- message = sd_bus_get_current_message(bus);
- if (!message)
- return 0;
-
- 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;
-
- u = manager_get_unit_by_pid(m, pid);
- } else {
- r = manager_load_unit_from_dbus_path(m, path, error, &u);
- if (r < 0)
- return 0;
- }
-
- if (!u)
- return 0;
-
- *unit = u;
- return 1;
-}
-
-static int bus_unit_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- return find_unit(m, bus, path, (Unit**) found, error);
-}
-
-static int bus_unit_interface_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- Unit *u;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = find_unit(m, bus, path, &u, error);
- if (r <= 0)
- return r;
-
- if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
- return 0;
-
- *found = u;
- return 1;
-}
-
-static int bus_unit_cgroup_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- Unit *u;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = find_unit(m, bus, path, &u, error);
- if (r <= 0)
- return r;
-
- if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
- return 0;
-
- if (!unit_get_cgroup_context(u))
- return 0;
-
- *found = u;
- return 1;
-}
-
-static int bus_cgroup_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- CGroupContext *c;
- Unit *u;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = find_unit(m, bus, path, &u, error);
- if (r <= 0)
- return r;
-
- if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
- return 0;
-
- c = unit_get_cgroup_context(u);
- if (!c)
- return 0;
-
- *found = c;
- return 1;
-}
-
-static int bus_exec_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- ExecContext *c;
- Unit *u;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = find_unit(m, bus, path, &u, error);
- if (r <= 0)
- return r;
-
- if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
- return 0;
-
- c = unit_get_exec_context(u);
- if (!c)
- return 0;
-
- *found = c;
- return 1;
-}
-
-static int bus_kill_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
- Manager *m = userdata;
- KillContext *c;
- Unit *u;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
- assert(found);
- assert(m);
-
- r = find_unit(m, bus, path, &u, error);
- if (r <= 0)
- return r;
-
- if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
- return 0;
-
- c = unit_get_kill_context(u);
- if (!c)
- return 0;
-
- *found = c;
- return 1;
-}
-
-static int bus_job_enumerate(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
- _cleanup_free_ char **l = NULL;
- Manager *m = userdata;
- unsigned k = 0;
- Iterator i;
- Job *j;
-
- l = new0(char*, hashmap_size(m->jobs)+1);
- if (!l)
- return -ENOMEM;
-
- HASHMAP_FOREACH(j, m->jobs, i) {
- l[k] = job_dbus_path(j);
- if (!l[k])
- return -ENOMEM;
-
- k++;
- }
-
- assert(hashmap_size(m->jobs) == k);
-
- *nodes = l;
- l = NULL;
-
- return k;
-}
-
-static int bus_unit_enumerate(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
- _cleanup_free_ char **l = NULL;
- Manager *m = userdata;
- unsigned k = 0;
- Iterator i;
- Unit *u;
-
- l = new0(char*, hashmap_size(m->units)+1);
- if (!l)
- return -ENOMEM;
-
- HASHMAP_FOREACH(u, m->units, i) {
- l[k] = unit_dbus_path(u);
- if (!l[k])
- return -ENOMEM;
-
- k++;
- }
-
- *nodes = l;
- l = NULL;
-
- return k;
-}
-
-static int bus_setup_api_vtables(Manager *m, sd_bus *bus) {
- UnitType t;
- int r;
-
- assert(m);
- assert(bus);
-
-#ifdef HAVE_SELINUX
- r = sd_bus_add_filter(bus, NULL, mac_selinux_filter, m);
- if (r < 0)
- return log_error_errno(r, "Failed to add SELinux access filter: %m");
-#endif
-
- r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", bus_manager_vtable, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register Manager vtable: %m");
-
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/job", "org.freedesktop.systemd1.Job", bus_job_vtable, bus_job_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register Job vtable: %m");
-
- r = sd_bus_add_node_enumerator(bus, NULL, "/org/freedesktop/systemd1/job", bus_job_enumerate, m);
- if (r < 0)
- return log_error_errno(r, "Failed to add job enumerator: %m");
-
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", "org.freedesktop.systemd1.Unit", bus_unit_vtable, bus_unit_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register Unit vtable: %m");
-
- r = sd_bus_add_node_enumerator(bus, NULL, "/org/freedesktop/systemd1/unit", bus_unit_enumerate, m);
- if (r < 0)
- return log_error_errno(r, "Failed to add job enumerator: %m");
-
- for (t = 0; t < _UNIT_TYPE_MAX; t++) {
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, unit_vtable[t]->bus_vtable, bus_unit_interface_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register type specific vtable for %s: %m", unit_vtable[t]->bus_interface);
-
- if (unit_vtable[t]->cgroup_context_offset > 0) {
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_unit_cgroup_vtable, bus_unit_cgroup_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register control group unit vtable for %s: %m", unit_vtable[t]->bus_interface);
-
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_cgroup_vtable, bus_cgroup_context_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register control group vtable for %s: %m", unit_vtable[t]->bus_interface);
- }
-
- if (unit_vtable[t]->exec_context_offset > 0) {
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_exec_vtable, bus_exec_context_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register execute vtable for %s: %m", unit_vtable[t]->bus_interface);
- }
-
- if (unit_vtable[t]->kill_context_offset > 0) {
- r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_kill_vtable, bus_kill_context_find, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register kill vtable for %s: %m", unit_vtable[t]->bus_interface);
- }
- }
-
- return 0;
-}
-
-static int bus_setup_disconnected_match(Manager *m, sd_bus *bus) {
- int r;
-
- assert(m);
- assert(bus);
-
- r = sd_bus_add_match(
- bus,
- NULL,
- "sender='org.freedesktop.DBus.Local',"
- "type='signal',"
- "path='/org/freedesktop/DBus/Local',"
- "interface='org.freedesktop.DBus.Local',"
- "member='Disconnected'",
- signal_disconnected, m);
-
- if (r < 0)
- return log_error_errno(r, "Failed to register match for Disconnected message: %m");
-
- return 0;
-}
-
-static int bus_on_connection(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- _cleanup_bus_unref_ sd_bus *bus = NULL;
- _cleanup_close_ int nfd = -1;
- Manager *m = userdata;
- sd_id128_t id;
- int r;
-
- assert(s);
- assert(m);
-
- nfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
- if (nfd < 0) {
- log_warning_errno(errno, "Failed to accept private connection, ignoring: %m");
- return 0;
- }
-
- if (set_size(m->private_buses) >= CONNECTIONS_MAX) {
- log_warning("Too many concurrent connections, refusing");
- return 0;
- }
-
- r = set_ensure_allocated(&m->private_buses, NULL);
- if (r < 0) {
- log_oom();
- return 0;
- }
-
- r = sd_bus_new(&bus);
- if (r < 0) {
- log_warning_errno(r, "Failed to allocate new private connection bus: %m");
- return 0;
- }
-
- r = sd_bus_set_fd(bus, nfd, nfd);
- if (r < 0) {
- log_warning_errno(r, "Failed to set fd on new connection bus: %m");
- return 0;
- }
-
- nfd = -1;
-
- r = bus_check_peercred(bus);
- if (r < 0) {
- log_warning_errno(r, "Incoming private connection from unprivileged client, refusing: %m");
- return 0;
- }
-
- assert_se(sd_id128_randomize(&id) >= 0);
-
- r = sd_bus_set_server(bus, 1, id);
- if (r < 0) {
- log_warning_errno(r, "Failed to enable server support for new connection bus: %m");
- return 0;
- }
-
- r = sd_bus_start(bus);
- if (r < 0) {
- log_warning_errno(r, "Failed to start new connection bus: %m");
- return 0;
- }
-
- r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
- if (r < 0) {
- log_warning_errno(r, "Failed to attach new connection bus to event loop: %m");
- return 0;
- }
-
- if (m->running_as == SYSTEMD_SYSTEM) {
- /* When we run as system instance we get the Released
- * signal via a direct connection */
-
- r = sd_bus_add_match(
- bus,
- NULL,
- "type='signal',"
- "interface='org.freedesktop.systemd1.Agent',"
- "member='Released',"
- "path='/org/freedesktop/systemd1/agent'",
- signal_agent_released, m);
-
- if (r < 0) {
- log_warning_errno(r, "Failed to register Released match on new connection bus: %m");
- return 0;
- }
- }
-
- r = bus_setup_disconnected_match(m, bus);
- if (r < 0)
- return 0;
-
- r = bus_setup_api_vtables(m, bus);
- if (r < 0) {
- log_warning_errno(r, "Failed to set up API vtables on new connection bus: %m");
- return 0;
- }
-
- r = set_put(m->private_buses, bus);
- if (r < 0) {
- log_warning_errno(r, "Failed to add new conenction bus to set: %m");
- return 0;
- }
-
- bus = NULL;
-
- log_debug("Accepted new private connection.");
-
- return 0;
-}
-
-static int bus_list_names(Manager *m, sd_bus *bus) {
- _cleanup_strv_free_ char **names = NULL;
- char **i;
- int r;
-
- assert(m);
- assert(bus);
-
- r = sd_bus_list_names(bus, &names, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to get initial list of names: %m");
-
- /* This is a bit hacky, we say the owner of the name is the
- * name itself, because we don't want the extra traffic to
- * figure out the real owner. */
- STRV_FOREACH(i, names)
- manager_dispatch_bus_name_owner_changed(m, *i, NULL, *i);
-
- return 0;
-}
-
-static int bus_setup_api(Manager *m, sd_bus *bus) {
- int r;
-
- assert(m);
- assert(bus);
-
- /* Let's make sure we have enough credential bits so that we can make security and selinux decisions */
- r = sd_bus_negotiate_creds(bus, 1,
- SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|
- SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS|
- SD_BUS_CREDS_SELINUX_CONTEXT);
- if (r < 0)
- log_warning_errno(r, "Failed to enable credential passing, ignoring: %m");
-
- r = bus_setup_api_vtables(m, bus);
- if (r < 0)
- return r;
-
- r = sd_bus_add_match(
- bus,
- NULL,
- "type='signal',"
- "sender='org.freedesktop.DBus',"
- "path='/org/freedesktop/DBus',"
- "interface='org.freedesktop.DBus',"
- "member='NameOwnerChanged'",
- signal_name_owner_changed, m);
- if (r < 0)
- log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal: %m");
-
- r = sd_bus_add_match(
- bus,
- NULL,
- "type='signal',"
- "sender='org.freedesktop.DBus',"
- "path='/org/freedesktop/DBus',"
- "interface='org.freedesktop.systemd1.Activator',"
- "member='ActivationRequest'",
- signal_activation_request, m);
- if (r < 0)
- log_warning_errno(r, "Failed to subscribe to activation signal: %m");
-
- /* Allow replacing of our name, to ease implementation of
- * reexecution, where we keep the old connection open until
- * after the new connection is set up and the name installed
- * to allow clients to synchronously wait for reexecution to
- * finish */
- r = sd_bus_request_name(bus,"org.freedesktop.systemd1", SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_ALLOW_REPLACEMENT);
- if (r < 0)
- return log_error_errno(r, "Failed to register name: %m");
-
- bus_list_names(m, bus);
-
- log_debug("Successfully connected to API bus.");
- return 0;
-}
-
-static int bus_init_api(Manager *m) {
- _cleanup_bus_unref_ sd_bus *bus = NULL;
- int r;
-
- if (m->api_bus)
- return 0;
-
- /* The API and system bus is the same if we are running in system mode */
- if (m->running_as == SYSTEMD_SYSTEM && m->system_bus)
- bus = sd_bus_ref(m->system_bus);
- else {
- if (m->running_as == SYSTEMD_SYSTEM)
- r = sd_bus_open_system(&bus);
- else
- r = sd_bus_open_user(&bus);
-
- if (r < 0) {
- log_debug("Failed to connect to API bus, retrying later...");
- return 0;
- }
-
- r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
- if (r < 0) {
- log_error_errno(r, "Failed to attach API bus to event loop: %m");
- return 0;
- }
-
- r = bus_setup_disconnected_match(m, bus);
- if (r < 0)
- return 0;
- }
-
- r = bus_setup_api(m, bus);
- if (r < 0) {
- log_error_errno(r, "Failed to set up API bus: %m");
- return 0;
- }
-
- m->api_bus = bus;
- bus = NULL;
-
- return 0;
-}
-
-static int bus_setup_system(Manager *m, sd_bus *bus) {
- int r;
-
- assert(m);
- assert(bus);
-
- /* On kdbus or if we are a user instance we get the Released message via the system bus */
- if (m->running_as == SYSTEMD_USER || m->kdbus_fd >= 0) {
- r = sd_bus_add_match(
- bus,
- NULL,
- "type='signal',"
- "interface='org.freedesktop.systemd1.Agent',"
- "member='Released',"
- "path='/org/freedesktop/systemd1/agent'",
- signal_agent_released, m);
- if (r < 0)
- log_warning_errno(r, "Failed to register Released match on system bus: %m");
- }
-
- log_debug("Successfully connected to system bus.");
- return 0;
-}
-
-static int bus_init_system(Manager *m) {
- _cleanup_bus_unref_ sd_bus *bus = NULL;
- int r;
-
- if (m->system_bus)
- return 0;
-
- /* The API and system bus is the same if we are running in system mode */
- if (m->running_as == SYSTEMD_SYSTEM && m->api_bus) {
- m->system_bus = sd_bus_ref(m->api_bus);
- return 0;
- }
-
- r = sd_bus_open_system(&bus);
- if (r < 0) {
- log_debug("Failed to connect to system bus, retrying later...");
- return 0;
- }
-
- r = bus_setup_disconnected_match(m, bus);
- if (r < 0)
- return 0;
-
- r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
- if (r < 0) {
- log_error_errno(r, "Failed to attach system bus to event loop: %m");
- return 0;
- }
-
- r = bus_setup_system(m, bus);
- if (r < 0) {
- log_error_errno(r, "Failed to set up system bus: %m");
- return 0;
- }
-
- m->system_bus = bus;
- bus = NULL;
-
- return 0;
-}
-
-static int bus_init_private(Manager *m) {
- _cleanup_close_ int fd = -1;
- union sockaddr_union sa = {
- .un.sun_family = AF_UNIX
- };
- sd_event_source *s;
- socklen_t salen;
- int r;
-
- assert(m);
-
- if (m->private_listen_fd >= 0)
- return 0;
-
- /* We don't need the private socket if we have kdbus */
- if (m->kdbus_fd >= 0)
- return 0;
-
- if (m->running_as == SYSTEMD_SYSTEM) {
-
- /* We want the private bus only when running as init */
- if (getpid() != 1)
- return 0;
-
- strcpy(sa.un.sun_path, "/run/systemd/private");
- salen = offsetof(union sockaddr_union, un.sun_path) + strlen("/run/systemd/private");
- } else {
- size_t left = sizeof(sa.un.sun_path);
- char *p = sa.un.sun_path;
- const char *e;
-
- e = secure_getenv("XDG_RUNTIME_DIR");
- if (!e) {
- log_error("Failed to determine XDG_RUNTIME_DIR");
- return -EHOSTDOWN;
- }
-
- left = strpcpy(&p, left, e);
- left = strpcpy(&p, left, "/systemd/private");
-
- salen = sizeof(sa.un) - left;
- }
-
- (void) mkdir_parents_label(sa.un.sun_path, 0755);
- (void) unlink(sa.un.sun_path);
-
- fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (fd < 0)
- return log_error_errno(errno, "Failed to allocate private socket: %m");
-
- r = bind(fd, &sa.sa, salen);
- if (r < 0)
- return log_error_errno(errno, "Failed to bind private socket: %m");
-
- r = listen(fd, SOMAXCONN);
- if (r < 0)
- return log_error_errno(errno, "Failed to make private socket listening: %m");
-
- r = sd_event_add_io(m->event, &s, fd, EPOLLIN, bus_on_connection, m);
- if (r < 0)
- return log_error_errno(r, "Failed to allocate event source: %m");
-
- m->private_listen_fd = fd;
- m->private_listen_event_source = s;
- fd = -1;
-
- log_debug("Successfully created private D-Bus server.");
-
- return 0;
-}
-
-int bus_init(Manager *m, bool try_bus_connect) {
- int r;
-
- if (try_bus_connect) {
- r = bus_init_system(m);
- if (r < 0)
- return r;
-
- r = bus_init_api(m);
- if (r < 0)
- return r;
- }
-
- r = bus_init_private(m);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static void destroy_bus(Manager *m, sd_bus **bus) {
- Iterator i;
- Job *j;
-
- assert(m);
- assert(bus);
-
- if (!*bus)
- return;
-
- /* Get rid of tracked clients on this bus */
- if (m->subscribed && sd_bus_track_get_bus(m->subscribed) == *bus)
- m->subscribed = sd_bus_track_unref(m->subscribed);
-
- HASHMAP_FOREACH(j, m->jobs, i)
- if (j->clients && sd_bus_track_get_bus(j->clients) == *bus)
- j->clients = sd_bus_track_unref(j->clients);
-
- /* Get rid of queued message on this bus */
- if (m->queued_message_bus == *bus) {
- m->queued_message_bus = sd_bus_unref(m->queued_message_bus);
-
- if (m->queued_message)
- m->queued_message = sd_bus_message_unref(m->queued_message);
- }
-
- /* Possibly flush unwritten data, but only if we are
- * unprivileged, since we don't want to sync here */
- if (m->running_as != SYSTEMD_SYSTEM)
- sd_bus_flush(*bus);
-
- /* And destroy the object */
- sd_bus_close(*bus);
- *bus = sd_bus_unref(*bus);
-}
-
-void bus_done(Manager *m) {
- sd_bus *b;
-
- assert(m);
-
- if (m->api_bus)
- destroy_bus(m, &m->api_bus);
- if (m->system_bus)
- destroy_bus(m, &m->system_bus);
- while ((b = set_steal_first(m->private_buses)))
- destroy_bus(m, &b);
-
- set_free(m->private_buses);
- m->private_buses = NULL;
-
- m->subscribed = sd_bus_track_unref(m->subscribed);
- strv_free(m->deserialized_subscribed);
- m->deserialized_subscribed = NULL;
-
- if (m->private_listen_event_source)
- m->private_listen_event_source = sd_event_source_unref(m->private_listen_event_source);
-
- m->private_listen_fd = safe_close(m->private_listen_fd);
-
- bus_verify_polkit_async_registry_free(m->polkit_registry);
-}
-
-int bus_fdset_add_all(Manager *m, FDSet *fds) {
- Iterator i;
- sd_bus *b;
- int fd;
-
- assert(m);
- assert(fds);
-
- /* When we are about to reexecute we add all D-Bus fds to the
- * set to pass over to the newly executed systemd. They won't
- * be used there however, except thatt they are closed at the
- * very end of deserialization, those making it possible for
- * clients to synchronously wait for systemd to reexec by
- * simply waiting for disconnection */
-
- if (m->api_bus) {
- fd = sd_bus_get_fd(m->api_bus);
- if (fd >= 0) {
- fd = fdset_put_dup(fds, fd);
- if (fd < 0)
- return fd;
- }
- }
-
- SET_FOREACH(b, m->private_buses, i) {
- fd = sd_bus_get_fd(b);
- if (fd >= 0) {
- fd = fdset_put_dup(fds, fd);
- if (fd < 0)
- return fd;
- }
- }
-
- /* We don't offer any APIs on the system bus (well, unless it
- * is the same as the API bus) hence we don't bother with it
- * here */
-
- return 0;
-}
-
-int bus_foreach_bus(
- Manager *m,
- sd_bus_track *subscribed2,
- int (*send_message)(sd_bus *bus, void *userdata),
- void *userdata) {
-
- Iterator i;
- sd_bus *b;
- int r, ret = 0;
-
- /* Send to all direct busses, unconditionally */
- SET_FOREACH(b, m->private_buses, i) {
- r = send_message(b, userdata);
- if (r < 0)
- ret = r;
- }
-
- /* Send to API bus, but only if somebody is subscribed */
- if (sd_bus_track_count(m->subscribed) > 0 ||
- sd_bus_track_count(subscribed2) > 0) {
- r = send_message(m->api_bus, userdata);
- if (r < 0)
- ret = r;
- }
-
- return ret;
-}
-
-void bus_track_serialize(sd_bus_track *t, FILE *f) {
- const char *n;
-
- assert(f);
-
- for (n = sd_bus_track_first(t); n; n = sd_bus_track_next(t))
- fprintf(f, "subscribed=%s\n", n);
-}
-
-int bus_track_deserialize_item(char ***l, const char *line) {
- const char *e;
- int r;
-
- assert(l);
- assert(line);
-
- e = startswith(line, "subscribed=");
- if (!e)
- return 0;
-
- r = strv_extend(l, e);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-int bus_track_coldplug(Manager *m, sd_bus_track **t, char ***l) {
- int r = 0;
-
- assert(m);
- assert(t);
- assert(l);
-
- if (!strv_isempty(*l) && m->api_bus) {
- char **i;
-
- if (!*t) {
- r = sd_bus_track_new(m->api_bus, t, NULL, NULL);
- if (r < 0)
- return r;
- }
-
- r = 0;
- STRV_FOREACH(i, *l) {
- int k;
-
- k = sd_bus_track_add_name(*t, *i);
- if (k < 0)
- r = k;
- }
- }
-
- strv_free(*l);
- *l = NULL;
-
- return r;
-}
-
-int bus_verify_manage_units_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
- return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.manage-units", false, UID_INVALID, &m->polkit_registry, error);
-}
-
-/* Same as bus_verify_manage_unit_async(), but checks for CAP_KILL instead of CAP_SYS_ADMIN */
-int bus_verify_manage_units_async_for_kill(Manager *m, sd_bus_message *call, sd_bus_error *error) {
- return bus_verify_polkit_async(call, CAP_KILL, "org.freedesktop.systemd1.manage-units", false, UID_INVALID, &m->polkit_registry, error);
-}
-
-int bus_verify_manage_unit_files_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
- return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.manage-unit-files", false, UID_INVALID, &m->polkit_registry, error);
-}
-
-int bus_verify_reload_daemon_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
- return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.reload-daemon", false, UID_INVALID, &m->polkit_registry, error);
-}
-
-int bus_verify_set_environment_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
- return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.set-environment", false, UID_INVALID, &m->polkit_registry, error);
-}
~ianmdlvl / elogind.git / blobdiff