1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
23 #include <sys/ioctl.h>
29 #include "cgroup-util.h"
31 #include "bus-error.h"
32 #include "udev-util.h"
34 #include "terminal-util.h"
36 int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) {
42 d = hashmap_get(m->devices, sysfs);
44 /* we support adding master-flags, but not removing them */
45 d->master = d->master || master;
47 d = device_new(m, sysfs, master);
58 int manager_add_seat(Manager *m, const char *id, Seat **_seat) {
64 s = hashmap_get(m->seats, id);
77 int manager_add_session(Manager *m, const char *id, Session **_session) {
83 s = hashmap_get(m->sessions, id);
85 s = session_new(m, id);
96 int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {
102 u = hashmap_get(m->users, UID_TO_PTR(uid));
104 u = user_new(m, uid, gid, name);
115 int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
123 r = get_user_creds(&name, &uid, &gid, NULL, NULL);
127 return manager_add_user(m, uid, gid, name, _user);
130 int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
138 return errno ? -errno : -ENOENT;
140 return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
143 int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
149 i = hashmap_get(m->inhibitors, id);
157 i = inhibitor_new(m, id);
167 int manager_add_button(Manager *m, const char *name, Button **_button) {
173 b = hashmap_get(m->buttons, name);
175 b = button_new(m, name);
186 int manager_watch_busname(Manager *m, const char *name) {
193 if (set_get(m->busnames, (char*) name))
200 r = set_put(m->busnames, n);
209 void manager_drop_busname(Manager *m, const char *name) {
216 /* keep it if the name still owns a controller */
217 HASHMAP_FOREACH(session, m->sessions, i)
218 if (session_is_controller(session, name))
221 free(set_remove(m->busnames, (char*) name));
224 int manager_process_seat_device(Manager *m, struct udev_device *d) {
230 if (streq_ptr(udev_device_get_action(d), "remove")) {
232 device = hashmap_get(m->devices, udev_device_get_syspath(d));
236 seat_add_to_gc_queue(device->seat);
244 sn = udev_device_get_property_value(d, "ID_SEAT");
248 if (!seat_name_is_valid(sn)) {
249 log_warning("Device with invalid seat name %s found, ignoring.", sn);
253 seat = hashmap_get(m->seats, sn);
254 master = udev_device_has_tag(d, "master-of-seat");
256 /* Ignore non-master devices for unknown seats */
257 if (!master && !seat)
260 r = manager_add_device(m, udev_device_get_syspath(d), master, &device);
265 r = manager_add_seat(m, sn, &seat);
274 device_attach(device, seat);
281 int manager_process_button_device(Manager *m, struct udev_device *d) {
288 if (streq_ptr(udev_device_get_action(d), "remove")) {
290 b = hashmap_get(m->buttons, udev_device_get_sysname(d));
299 r = manager_add_button(m, udev_device_get_sysname(d), &b);
303 sn = udev_device_get_property_value(d, "ID_SEAT");
307 button_set_seat(b, sn);
314 int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
318 /* Without cgroups, we have no way to map from pid to
323 int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
330 /* Without cgroups, we have no way to map from pid to
335 int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
338 dual_timestamp ts = { 0, 0 };
343 idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL);
345 HASHMAP_FOREACH(s, m->sessions, i) {
349 ih = session_get_idle_hint(s, &k);
355 if (k.monotonic < ts.monotonic)
361 } else if (idle_hint) {
363 if (k.monotonic > ts.monotonic)
374 bool manager_shall_kill(Manager *m, const char *user) {
378 if (!m->kill_user_processes)
381 if (strv_contains(m->kill_exclude_users, user))
384 if (strv_isempty(m->kill_only_users))
387 return strv_contains(m->kill_only_users, user);
390 static int vt_is_busy(unsigned int vtnr) {
391 struct vt_stat vt_stat;
393 _cleanup_close_ int fd;
397 /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
398 * we'd open the latter we'd open the foreground tty which
399 * hence would be unconditionally busy. By opening /dev/tty1
400 * we avoid this. Since tty1 is special and needs to be an
401 * explicitly loaded getty or DM this is safe. */
403 fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
407 if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)
410 r = !!(vt_stat.v_state & (1 << vtnr));
415 bool manager_is_docked(Manager *m) {
419 HASHMAP_FOREACH(b, m->buttons, i)
426 int manager_count_displays(Manager *m) {
427 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
428 struct udev_list_entry *item = NULL, *first = NULL;
432 e = udev_enumerate_new(m->udev);
436 r = udev_enumerate_add_match_subsystem(e, "drm");
440 r = udev_enumerate_scan_devices(e);
444 first = udev_enumerate_get_list_entry(e);
445 udev_list_entry_foreach(item, first) {
446 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
447 struct udev_device *p;
450 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
454 p = udev_device_get_parent(d);
458 /* If the parent shares the same subsystem as the
459 * device we are looking at then it is a connector,
460 * which is what we are interested in. */
461 if (!streq_ptr(udev_device_get_subsystem(p), "drm"))
464 /* We count any connector which is not explicitly
465 * "disconnected" as connected. */
466 status = udev_device_get_sysattr_value(d, "status");
467 if (!streq_ptr(status, "disconnected"))
474 bool manager_is_docked_or_multiple_displays(Manager *m) {
477 /* If we are docked don't react to lid closing */
478 if (manager_is_docked(m)) {
479 log_debug("System is docked.");
483 /* If we have more than one display connected,
484 * assume that we are docked. */
485 n = manager_count_displays(m);
487 log_warning_errno(n, "Display counting failed: %m");
489 log_debug("Multiple (%i) displays connected.", n);