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/>.
24 #include <sys/ioctl.h>
25 #include <sys/types.h>
28 #include "alloc-util.h"
29 #include "bus-error.h"
31 #include "cgroup-util.h"
35 #include "terminal-util.h"
36 #include "udev-util.h"
37 #include "user-util.h"
39 int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) {
45 d = hashmap_get(m->devices, sysfs);
47 /* we support adding master-flags, but not removing them */
48 d->master = d->master || master;
50 d = device_new(m, sysfs, master);
61 int manager_add_seat(Manager *m, const char *id, Seat **_seat) {
67 s = hashmap_get(m->seats, id);
80 int manager_add_session(Manager *m, const char *id, Session **_session) {
86 s = hashmap_get(m->sessions, id);
88 s = session_new(m, id);
99 int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {
106 u = hashmap_get(m->users, UID_TO_PTR(uid));
108 r = user_new(&u, m, uid, gid, name);
119 int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
127 r = get_user_creds(&name, &uid, &gid, NULL, NULL);
131 return manager_add_user(m, uid, gid, name, _user);
134 int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
142 return errno ? -errno : -ENOENT;
144 return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
147 int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
153 i = hashmap_get(m->inhibitors, id);
161 i = inhibitor_new(m, id);
171 int manager_add_button(Manager *m, const char *name, Button **_button) {
177 b = hashmap_get(m->buttons, name);
179 b = button_new(m, name);
190 int manager_process_seat_device(Manager *m, struct udev_device *d) {
196 if (streq_ptr(udev_device_get_action(d), "remove")) {
198 device = hashmap_get(m->devices, udev_device_get_syspath(d));
202 seat_add_to_gc_queue(device->seat);
210 sn = udev_device_get_property_value(d, "ID_SEAT");
214 if (!seat_name_is_valid(sn)) {
215 log_warning("Device with invalid seat name %s found, ignoring.", sn);
219 seat = hashmap_get(m->seats, sn);
220 master = udev_device_has_tag(d, "master-of-seat");
222 /* Ignore non-master devices for unknown seats */
223 if (!master && !seat)
226 r = manager_add_device(m, udev_device_get_syspath(d), master, &device);
231 r = manager_add_seat(m, sn, &seat);
240 device_attach(device, seat);
247 int manager_process_button_device(Manager *m, struct udev_device *d) {
254 if (streq_ptr(udev_device_get_action(d), "remove")) {
256 b = hashmap_get(m->buttons, udev_device_get_sysname(d));
265 r = manager_add_button(m, udev_device_get_sysname(d), &b);
269 sn = udev_device_get_property_value(d, "ID_SEAT");
273 button_set_seat(b, sn);
280 int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
281 /// elogind does not support systemd units, but its own session system
283 _cleanup_free_ char *unit = NULL;
285 _cleanup_free_ char *session_name = NULL;
295 /// elogind does not support systemd units, but its own session system
297 r = cg_pid_get_unit(pid, &unit);
301 s = hashmap_get(m->session_units, unit);
303 log_debug_elogind("Searching session for PID %u", pid);
304 r = cg_pid_get_session(pid, &session_name);
308 s = hashmap_get(m->sessions, session_name);
309 log_debug_elogind("Session Name \"%s\" -> Session \"%s\"",
310 session_name, s && s->id ? s->id : "NULL");
320 int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
321 /// elogind does not support systemd units, but its own session system
323 _cleanup_free_ char *unit = NULL;
336 /// elogind does not support systemd units, but its own session system
338 r = cg_pid_get_slice(pid, &unit);
342 u = hashmap_get(m->user_units, unit);
348 r = manager_get_session_by_pid (m, pid, &s);
358 int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
361 dual_timestamp ts = DUAL_TIMESTAMP_NULL;
366 idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL);
368 HASHMAP_FOREACH(s, m->sessions, i) {
372 ih = session_get_idle_hint(s, &k);
378 if (k.monotonic < ts.monotonic)
384 } else if (idle_hint) {
386 if (k.monotonic > ts.monotonic)
397 bool manager_shall_kill(Manager *m, const char *user) {
401 if (!m->kill_user_processes)
404 if (strv_contains(m->kill_exclude_users, user))
407 if (strv_isempty(m->kill_only_users))
410 return strv_contains(m->kill_only_users, user);
413 /// UNNEEDED by elogind
415 static int vt_is_busy(unsigned int vtnr) {
416 struct vt_stat vt_stat;
418 _cleanup_close_ int fd;
422 /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
423 * we'd open the latter we'd open the foreground tty which
424 * hence would be unconditionally busy. By opening /dev/tty1
425 * we avoid this. Since tty1 is special and needs to be an
426 * explicitly loaded getty or DM this is safe. */
428 fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
432 if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)
435 r = !!(vt_stat.v_state & (1 << vtnr));
440 int manager_spawn_autovt(Manager *m, unsigned int vtnr) {
441 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
442 char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
448 if (vtnr > m->n_autovts &&
449 vtnr != m->reserve_vt)
452 if (vtnr != m->reserve_vt) {
453 /* If this is the reserved TTY, we'll start the getty
454 * on it in any case, but otherwise only if it is not
457 r = vt_is_busy(vtnr);
464 snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr);
465 r = sd_bus_call_method(
467 "org.freedesktop.systemd1",
468 "/org/freedesktop/systemd1",
469 "org.freedesktop.systemd1.Manager",
475 log_error("Failed to start %s: %s", name, bus_error_message(&error, r));
481 static bool manager_is_docked(Manager *m) {
485 HASHMAP_FOREACH(b, m->buttons, i)
492 static int manager_count_external_displays(Manager *m) {
493 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
494 struct udev_list_entry *item = NULL, *first = NULL;
498 e = udev_enumerate_new(m->udev);
502 r = udev_enumerate_add_match_subsystem(e, "drm");
506 r = udev_enumerate_scan_devices(e);
510 first = udev_enumerate_get_list_entry(e);
511 udev_list_entry_foreach(item, first) {
512 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
513 struct udev_device *p;
514 const char *status, *enabled, *dash, *nn, *i;
515 bool external = false;
517 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
521 p = udev_device_get_parent(d);
525 /* If the parent shares the same subsystem as the
526 * device we are looking at then it is a connector,
527 * which is what we are interested in. */
528 if (!streq_ptr(udev_device_get_subsystem(p), "drm"))
531 nn = udev_device_get_sysname(d);
535 /* Ignore internal displays: the type is encoded in
536 * the sysfs name, as the second dash seperated item
537 * (the first is the card name, the last the connector
538 * number). We implement a whitelist of external
539 * displays here, rather than a whitelist, to ensure
540 * we don't block suspends too eagerly. */
541 dash = strchr(nn, '-');
546 FOREACH_STRING(i, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-"
547 "Composite-", "SVIDEO-", "Component-",
548 "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") {
550 if (startswith(dash, i)) {
558 /* Ignore ports that are not enabled */
559 enabled = udev_device_get_sysattr_value(d, "enabled");
562 if (!streq_ptr(enabled, "enabled"))
565 /* We count any connector which is not explicitly
566 * "disconnected" as connected. */
567 status = udev_device_get_sysattr_value(d, "status");
568 if (!streq_ptr(status, "disconnected"))
575 bool manager_is_docked_or_external_displays(Manager *m) {
578 /* If we are docked don't react to lid closing */
579 if (manager_is_docked(m)) {
580 log_debug("System is docked.");
584 /* If we have more than one display connected,
585 * assume that we are docked. */
586 n = manager_count_external_displays(m);
588 log_warning_errno(n, "Display counting failed: %m");
590 log_debug("External (%i) displays connected.", n);