718d006a63
Session compositors need access to fbdev, DRM and evdev devices if they control a session. To make logind pass them to sessions, we need to listen for them actively. However, we avoid creating new seats for non master-of-seat devices. Only once a seat is created, we start remembering all other session devices. If the last master-device is removed (even if there are other non-master devices still available), we destroy the seat. This is the current behavior, but we need to explicitly implement it now as there may be non-master devices in the seat->devices list. Unlike master devices, we don't care whether our list of non-master devices is complete. We don't export this list but use it only as cache if sessions request these devices. Hence, if a session requests a device that is not in the list, we will simply look it up. However, once a session requested a device, we must be notified of "remove" udev events. So we must link the devices somehow into the device-list. Regarding the implementation, we now sort the device list by the "master" flag. This guarantees that master devices are at the front and non-master devices at the tail of the list. Thus, we can easily test whether a seat has a master device attached.
193 lines
6.1 KiB
C
193 lines
6.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <inttypes.h>
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#include <dbus/dbus.h>
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#include <libudev.h>
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#include "util.h"
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#include "audit.h"
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#include "list.h"
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#include "hashmap.h"
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#include "cgroup-util.h"
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typedef struct Manager Manager;
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#include "logind-device.h"
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#include "logind-seat.h"
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#include "logind-session.h"
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#include "logind-user.h"
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#include "logind-inhibit.h"
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#include "logind-button.h"
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#include "logind-action.h"
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struct Manager {
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DBusConnection *bus;
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Hashmap *devices;
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Hashmap *seats;
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Hashmap *sessions;
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Hashmap *users;
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Hashmap *inhibitors;
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Hashmap *buttons;
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LIST_HEAD(Seat, seat_gc_queue);
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LIST_HEAD(Session, session_gc_queue);
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LIST_HEAD(User, user_gc_queue);
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struct udev *udev;
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struct udev_monitor *udev_seat_monitor, *udev_device_monitor, *udev_vcsa_monitor, *udev_button_monitor;
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int udev_seat_fd;
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int udev_device_fd;
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int udev_vcsa_fd;
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int udev_button_fd;
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int console_active_fd;
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int bus_fd;
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int epoll_fd;
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unsigned n_autovts;
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unsigned reserve_vt;
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int reserve_vt_fd;
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Seat *vtconsole;
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char **kill_only_users, **kill_exclude_users;
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bool kill_user_processes;
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unsigned long session_counter;
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unsigned long inhibit_counter;
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Hashmap *session_units;
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Hashmap *user_units;
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Hashmap *session_fds;
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Hashmap *inhibitor_fds;
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Hashmap *button_fds;
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usec_t inhibit_delay_max;
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/* If an action is currently being executed or is delayed,
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* this is != 0 and encodes what is being done */
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InhibitWhat action_what;
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/* If a shutdown/suspend was delayed due to a inhibitor this
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contains the unit name we are supposed to start after the
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delay is over */
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const char *action_unit;
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/* If a shutdown/suspend is currently executed, then this is
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* the job of it */
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char *action_job;
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usec_t action_timestamp;
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int idle_action_fd; /* the timer_fd */
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usec_t idle_action_usec;
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usec_t idle_action_not_before_usec;
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HandleAction idle_action;
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HandleAction handle_power_key;
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HandleAction handle_suspend_key;
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HandleAction handle_hibernate_key;
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HandleAction handle_lid_switch;
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bool power_key_ignore_inhibited;
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bool suspend_key_ignore_inhibited;
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bool hibernate_key_ignore_inhibited;
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bool lid_switch_ignore_inhibited;
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};
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enum {
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FD_SEAT_UDEV,
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FD_DEVICE_UDEV,
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FD_VCSA_UDEV,
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FD_BUTTON_UDEV,
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FD_CONSOLE,
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FD_BUS,
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FD_IDLE_ACTION,
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FD_OTHER_BASE
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};
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Manager *manager_new(void);
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void manager_free(Manager *m);
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int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device);
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int manager_add_button(Manager *m, const char *name, Button **_button);
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int manager_add_seat(Manager *m, const char *id, Seat **_seat);
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int manager_add_session(Manager *m, const char *id, Session **_session);
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int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user);
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int manager_add_user_by_name(Manager *m, const char *name, User **_user);
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int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user);
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int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor);
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int manager_process_seat_device(Manager *m, struct udev_device *d);
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int manager_process_button_device(Manager *m, struct udev_device *d);
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int manager_dispatch_seat_udev(Manager *m);
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int manager_dispatch_vcsa_udev(Manager *m);
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int manager_dispatch_button_udev(Manager *m);
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int manager_dispatch_console(Manager *m);
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int manager_dispatch_idle_action(Manager *m);
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int manager_enumerate_devices(Manager *m);
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int manager_enumerate_buttons(Manager *m);
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int manager_enumerate_seats(Manager *m);
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int manager_enumerate_sessions(Manager *m);
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int manager_enumerate_users(Manager *m);
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int manager_enumerate_inhibitors(Manager *m);
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int manager_startup(Manager *m);
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int manager_run(Manager *m);
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int manager_spawn_autovt(Manager *m, int vtnr);
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void manager_gc(Manager *m, bool drop_not_started);
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bool manager_shall_kill(Manager *m, const char *user);
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int manager_get_idle_hint(Manager *m, dual_timestamp *t);
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int manager_get_user_by_pid(Manager *m, pid_t pid, User **user);
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int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session);
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extern const DBusObjectPathVTable bus_manager_vtable;
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DBusHandlerResult bus_message_filter(DBusConnection *c, DBusMessage *message, void *userdata);
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int bus_manager_shutdown_or_sleep_now_or_later(Manager *m, const char *unit_name, InhibitWhat w, DBusError *error);
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int manager_send_changed(Manager *manager, const char *properties);
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int manager_dispatch_delayed(Manager *manager);
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int manager_start_scope(Manager *manager, const char *scope, pid_t pid, const char *slice, const char *description, const char *after, const char *kill_mode, DBusError *error, char **job);
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int manager_start_unit(Manager *manager, const char *unit, DBusError *error, char **job);
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int manager_stop_unit(Manager *manager, const char *unit, DBusError *error, char **job);
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int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, DBusError *error);
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int manager_unit_is_active(Manager *manager, const char *unit);
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/* gperf lookup function */
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const struct ConfigPerfItem* logind_gperf_lookup(const char *key, unsigned length);
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