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git.ipfire.org Git - thirdparty/systemd.git/blob - src/login/logind-core.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2011 Lennart Poettering
10 #include <sys/ioctl.h>
11 #include <sys/types.h>
14 #include "alloc-util.h"
15 #include "bus-error.h"
17 #include "cgroup-util.h"
20 #include "parse-util.h"
21 #include "process-util.h"
23 #include "terminal-util.h"
24 #include "udev-util.h"
25 #include "user-util.h"
27 int manager_add_device(Manager
*m
, const char *sysfs
, bool master
, Device
**_device
) {
33 d
= hashmap_get(m
->devices
, sysfs
);
35 /* we support adding master-flags, but not removing them */
36 d
->master
= d
->master
|| master
;
38 d
= device_new(m
, sysfs
, master
);
49 int manager_add_seat(Manager
*m
, const char *id
, Seat
**_seat
) {
55 s
= hashmap_get(m
->seats
, id
);
68 int manager_add_session(Manager
*m
, const char *id
, Session
**_session
) {
74 s
= hashmap_get(m
->sessions
, id
);
76 s
= session_new(m
, id
);
87 int manager_add_user(Manager
*m
, uid_t uid
, gid_t gid
, const char *name
, User
**_user
) {
94 u
= hashmap_get(m
->users
, UID_TO_PTR(uid
));
96 r
= user_new(&u
, m
, uid
, gid
, name
);
107 int manager_add_user_by_name(Manager
*m
, const char *name
, User
**_user
) {
115 r
= get_user_creds(&name
, &uid
, &gid
, NULL
, NULL
);
119 return manager_add_user(m
, uid
, gid
, name
, _user
);
122 int manager_add_user_by_uid(Manager
*m
, uid_t uid
, User
**_user
) {
130 return errno
> 0 ? -errno
: -ENOENT
;
132 return manager_add_user(m
, uid
, p
->pw_gid
, p
->pw_name
, _user
);
135 int manager_add_inhibitor(Manager
*m
, const char* id
, Inhibitor
**_inhibitor
) {
141 i
= hashmap_get(m
->inhibitors
, id
);
149 i
= inhibitor_new(m
, id
);
159 int manager_add_button(Manager
*m
, const char *name
, Button
**_button
) {
165 b
= hashmap_get(m
->buttons
, name
);
167 b
= button_new(m
, name
);
178 int manager_process_seat_device(Manager
*m
, struct udev_device
*d
) {
184 if (streq_ptr(udev_device_get_action(d
), "remove")) {
186 device
= hashmap_get(m
->devices
, udev_device_get_syspath(d
));
190 seat_add_to_gc_queue(device
->seat
);
198 sn
= udev_device_get_property_value(d
, "ID_SEAT");
202 if (!seat_name_is_valid(sn
)) {
203 log_warning("Device with invalid seat name %s found, ignoring.", sn
);
207 seat
= hashmap_get(m
->seats
, sn
);
208 master
= udev_device_has_tag(d
, "master-of-seat");
210 /* Ignore non-master devices for unknown seats */
211 if (!master
&& !seat
)
214 r
= manager_add_device(m
, udev_device_get_syspath(d
), master
, &device
);
219 r
= manager_add_seat(m
, sn
, &seat
);
228 device_attach(device
, seat
);
235 int manager_process_button_device(Manager
*m
, struct udev_device
*d
) {
242 if (streq_ptr(udev_device_get_action(d
), "remove")) {
244 b
= hashmap_get(m
->buttons
, udev_device_get_sysname(d
));
253 r
= manager_add_button(m
, udev_device_get_sysname(d
), &b
);
257 sn
= udev_device_get_property_value(d
, "ID_SEAT");
261 button_set_seat(b
, sn
);
264 if (r
< 0) /* event device doesn't have any keys or switches relevant to us? (or any other error
265 * opening the device?) let's close the button again. */
272 int manager_get_session_by_pid(Manager
*m
, pid_t pid
, Session
**ret
) {
273 _cleanup_free_
char *unit
= NULL
;
279 if (!pid_is_valid(pid
))
282 r
= cg_pid_get_unit(pid
, &unit
);
286 s
= hashmap_get(m
->session_units
, unit
);
301 int manager_get_user_by_pid(Manager
*m
, pid_t pid
, User
**ret
) {
302 _cleanup_free_
char *unit
= NULL
;
308 if (!pid_is_valid(pid
))
311 r
= cg_pid_get_slice(pid
, &unit
);
315 u
= hashmap_get(m
->user_units
, unit
);
331 int manager_get_idle_hint(Manager
*m
, dual_timestamp
*t
) {
334 dual_timestamp ts
= DUAL_TIMESTAMP_NULL
;
339 idle_hint
= !manager_is_inhibited(m
, INHIBIT_IDLE
, INHIBIT_BLOCK
, t
, false, false, 0, NULL
);
341 HASHMAP_FOREACH(s
, m
->sessions
, i
) {
345 ih
= session_get_idle_hint(s
, &k
);
351 if (k
.monotonic
< ts
.monotonic
)
357 } else if (idle_hint
) {
359 if (k
.monotonic
> ts
.monotonic
)
370 bool manager_shall_kill(Manager
*m
, const char *user
) {
374 if (!m
->kill_exclude_users
&& streq(user
, "root"))
377 if (strv_contains(m
->kill_exclude_users
, user
))
380 if (!strv_isempty(m
->kill_only_users
))
381 return strv_contains(m
->kill_only_users
, user
);
383 return m
->kill_user_processes
;
386 int config_parse_n_autovts(
388 const char *filename
,
391 unsigned section_line
,
407 r
= safe_atou(rvalue
, &o
);
409 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse number of autovts, ignoring: %s", rvalue
);
414 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "A maximum of 15 autovts are supported, ignoring: %s", rvalue
);
422 static int vt_is_busy(unsigned int vtnr
) {
423 struct vt_stat vt_stat
;
425 _cleanup_close_
int fd
;
429 /* VT_GETSTATE "cannot return state for more than 16 VTs, since v_state is short" */
432 /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
433 * we'd open the latter we'd open the foreground tty which
434 * hence would be unconditionally busy. By opening /dev/tty1
435 * we avoid this. Since tty1 is special and needs to be an
436 * explicitly loaded getty or DM this is safe. */
438 fd
= open_terminal("/dev/tty1", O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
442 if (ioctl(fd
, VT_GETSTATE
, &vt_stat
) < 0)
445 r
= !!(vt_stat
.v_state
& (1 << vtnr
));
450 int manager_spawn_autovt(Manager
*m
, unsigned int vtnr
) {
451 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
452 char name
[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
458 if (vtnr
> m
->n_autovts
&&
459 vtnr
!= m
->reserve_vt
)
462 if (vtnr
!= m
->reserve_vt
) {
463 /* If this is the reserved TTY, we'll start the getty
464 * on it in any case, but otherwise only if it is not
467 r
= vt_is_busy(vtnr
);
474 snprintf(name
, sizeof(name
), "autovt@tty%u.service", vtnr
);
475 r
= sd_bus_call_method(
477 "org.freedesktop.systemd1",
478 "/org/freedesktop/systemd1",
479 "org.freedesktop.systemd1.Manager",
485 log_error("Failed to start %s: %s", name
, bus_error_message(&error
, r
));
490 static bool manager_is_docked(Manager
*m
) {
494 HASHMAP_FOREACH(b
, m
->buttons
, i
)
501 static int manager_count_external_displays(Manager
*m
) {
502 _cleanup_(udev_enumerate_unrefp
) struct udev_enumerate
*e
= NULL
;
503 struct udev_list_entry
*item
= NULL
, *first
= NULL
;
507 e
= udev_enumerate_new(m
->udev
);
511 r
= udev_enumerate_add_match_subsystem(e
, "drm");
515 r
= udev_enumerate_scan_devices(e
);
519 first
= udev_enumerate_get_list_entry(e
);
520 udev_list_entry_foreach(item
, first
) {
521 _cleanup_(udev_device_unrefp
) struct udev_device
*d
= NULL
;
522 struct udev_device
*p
;
523 const char *status
, *enabled
, *dash
, *nn
, *i
;
524 bool external
= false;
526 d
= udev_device_new_from_syspath(m
->udev
, udev_list_entry_get_name(item
));
530 p
= udev_device_get_parent(d
);
534 /* If the parent shares the same subsystem as the
535 * device we are looking at then it is a connector,
536 * which is what we are interested in. */
537 if (!streq_ptr(udev_device_get_subsystem(p
), "drm"))
540 nn
= udev_device_get_sysname(d
);
544 /* Ignore internal displays: the type is encoded in
545 * the sysfs name, as the second dash separated item
546 * (the first is the card name, the last the connector
547 * number). We implement a whitelist of external
548 * displays here, rather than a whitelist, to ensure
549 * we don't block suspends too eagerly. */
550 dash
= strchr(nn
, '-');
555 FOREACH_STRING(i
, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-"
556 "Composite-", "SVIDEO-", "Component-",
557 "DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") {
559 if (startswith(dash
, i
)) {
567 /* Ignore ports that are not enabled */
568 enabled
= udev_device_get_sysattr_value(d
, "enabled");
571 if (!streq_ptr(enabled
, "enabled"))
574 /* We count any connector which is not explicitly
575 * "disconnected" as connected. */
576 status
= udev_device_get_sysattr_value(d
, "status");
577 if (!streq_ptr(status
, "disconnected"))
584 bool manager_is_docked_or_external_displays(Manager
*m
) {
587 /* If we are docked don't react to lid closing */
588 if (manager_is_docked(m
)) {
589 log_debug("System is docked.");
593 /* If we have more than one display connected,
594 * assume that we are docked. */
595 n
= manager_count_external_displays(m
);
597 log_warning_errno(n
, "Display counting failed: %m");
599 log_debug("External (%i) displays connected.", n
);
606 bool manager_is_on_external_power(void) {
609 /* For now we only check for AC power, but 'external power' can apply
610 * to anything that isn't an internal battery */
613 log_warning_errno(r
, "Failed to read AC power status: %m");
620 bool manager_all_buttons_ignored(Manager
*m
) {
623 if (m
->handle_power_key
!= HANDLE_IGNORE
)
625 if (m
->handle_suspend_key
!= HANDLE_IGNORE
)
627 if (m
->handle_hibernate_key
!= HANDLE_IGNORE
)
629 if (m
->handle_lid_switch
!= HANDLE_IGNORE
)
631 if (m
->handle_lid_switch_ep
!= _HANDLE_ACTION_INVALID
&&
632 m
->handle_lid_switch_ep
!= HANDLE_IGNORE
)
634 if (m
->handle_lid_switch_docked
!= HANDLE_IGNORE
)