0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
679 lines
18 KiB
C
679 lines
18 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <fcntl.h>
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#include <pwd.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <linux/vt.h>
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#include "alloc-util.h"
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#include "bus-error.h"
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#include "bus-util.h"
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#include "cgroup-util.h"
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#include "conf-parser.h"
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#include "fd-util.h"
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#include "logind.h"
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#include "parse-util.h"
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#include "process-util.h"
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#include "strv.h"
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#include "terminal-util.h"
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#include "udev-util.h"
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#include "user-util.h"
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void manager_reset_config(Manager *m) {
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assert(m);
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m->n_autovts = 6;
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m->reserve_vt = 6;
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m->remove_ipc = true;
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m->inhibit_delay_max = 5 * USEC_PER_SEC;
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m->handle_power_key = HANDLE_POWEROFF;
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m->handle_suspend_key = HANDLE_SUSPEND;
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m->handle_hibernate_key = HANDLE_HIBERNATE;
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m->handle_lid_switch = HANDLE_SUSPEND;
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m->handle_lid_switch_ep = _HANDLE_ACTION_INVALID;
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m->handle_lid_switch_docked = HANDLE_IGNORE;
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m->power_key_ignore_inhibited = false;
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m->suspend_key_ignore_inhibited = false;
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m->hibernate_key_ignore_inhibited = false;
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m->lid_switch_ignore_inhibited = true;
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m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
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m->idle_action_usec = 30 * USEC_PER_MINUTE;
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m->idle_action = HANDLE_IGNORE;
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m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
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m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
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m->sessions_max = 8192;
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m->inhibitors_max = 8192;
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m->kill_user_processes = KILL_USER_PROCESSES;
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m->kill_only_users = strv_free(m->kill_only_users);
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m->kill_exclude_users = strv_free(m->kill_exclude_users);
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}
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int manager_parse_config_file(Manager *m) {
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assert(m);
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return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
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CONF_PATHS_NULSTR("systemd/logind.conf.d"),
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"Login\0",
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config_item_perf_lookup, logind_gperf_lookup,
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CONFIG_PARSE_WARN, m);
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}
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int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) {
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Device *d;
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assert(m);
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assert(sysfs);
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d = hashmap_get(m->devices, sysfs);
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if (d)
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/* we support adding master-flags, but not removing them */
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d->master = d->master || master;
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else {
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d = device_new(m, sysfs, master);
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if (!d)
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return -ENOMEM;
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}
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if (_device)
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*_device = d;
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return 0;
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}
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int manager_add_seat(Manager *m, const char *id, Seat **_seat) {
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Seat *s;
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assert(m);
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assert(id);
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s = hashmap_get(m->seats, id);
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if (!s) {
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s = seat_new(m, id);
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if (!s)
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return -ENOMEM;
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}
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if (_seat)
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*_seat = s;
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return 0;
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}
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int manager_add_session(Manager *m, const char *id, Session **_session) {
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Session *s;
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assert(m);
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assert(id);
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s = hashmap_get(m->sessions, id);
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if (!s) {
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s = session_new(m, id);
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if (!s)
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return -ENOMEM;
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}
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if (_session)
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*_session = s;
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return 0;
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}
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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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User *u;
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int r;
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assert(m);
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assert(name);
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u = hashmap_get(m->users, UID_TO_PTR(uid));
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if (!u) {
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r = user_new(&u, m, uid, gid, name);
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if (r < 0)
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return r;
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}
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if (_user)
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*_user = u;
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return 0;
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}
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int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
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uid_t uid;
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gid_t gid;
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int r;
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assert(m);
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assert(name);
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r = get_user_creds(&name, &uid, &gid, NULL, NULL);
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if (r < 0)
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return r;
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return manager_add_user(m, uid, gid, name, _user);
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}
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int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
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struct passwd *p;
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assert(m);
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errno = 0;
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p = getpwuid(uid);
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if (!p)
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return errno > 0 ? -errno : -ENOENT;
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return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
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}
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int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
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Inhibitor *i;
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assert(m);
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assert(id);
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i = hashmap_get(m->inhibitors, id);
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if (i) {
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if (_inhibitor)
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*_inhibitor = i;
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return 0;
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}
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i = inhibitor_new(m, id);
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if (!i)
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return -ENOMEM;
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if (_inhibitor)
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*_inhibitor = i;
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return 0;
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}
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int manager_add_button(Manager *m, const char *name, Button **_button) {
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Button *b;
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assert(m);
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assert(name);
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b = hashmap_get(m->buttons, name);
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if (!b) {
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b = button_new(m, name);
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if (!b)
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return -ENOMEM;
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}
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if (_button)
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*_button = b;
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return 0;
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}
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int manager_process_seat_device(Manager *m, struct udev_device *d) {
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Device *device;
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int r;
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assert(m);
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if (streq_ptr(udev_device_get_action(d), "remove")) {
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device = hashmap_get(m->devices, udev_device_get_syspath(d));
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if (!device)
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return 0;
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seat_add_to_gc_queue(device->seat);
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device_free(device);
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} else {
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const char *sn;
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Seat *seat = NULL;
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bool master;
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sn = udev_device_get_property_value(d, "ID_SEAT");
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if (isempty(sn))
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sn = "seat0";
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if (!seat_name_is_valid(sn)) {
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log_warning("Device with invalid seat name %s found, ignoring.", sn);
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return 0;
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}
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seat = hashmap_get(m->seats, sn);
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master = udev_device_has_tag(d, "master-of-seat");
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/* Ignore non-master devices for unknown seats */
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if (!master && !seat)
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return 0;
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r = manager_add_device(m, udev_device_get_syspath(d), master, &device);
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if (r < 0)
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return r;
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if (!seat) {
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r = manager_add_seat(m, sn, &seat);
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if (r < 0) {
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if (!device->seat)
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device_free(device);
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return r;
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}
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}
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device_attach(device, seat);
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seat_start(seat);
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}
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return 0;
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}
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int manager_process_button_device(Manager *m, struct udev_device *d) {
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Button *b;
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int r;
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assert(m);
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if (streq_ptr(udev_device_get_action(d), "remove")) {
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b = hashmap_get(m->buttons, udev_device_get_sysname(d));
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if (!b)
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return 0;
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button_free(b);
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} else {
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const char *sn;
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r = manager_add_button(m, udev_device_get_sysname(d), &b);
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if (r < 0)
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return r;
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sn = udev_device_get_property_value(d, "ID_SEAT");
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if (isempty(sn))
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sn = "seat0";
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button_set_seat(b, sn);
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r = button_open(b);
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if (r < 0) /* event device doesn't have any keys or switches relevant to us? (or any other error
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* opening the device?) let's close the button again. */
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button_free(b);
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}
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return 0;
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}
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int manager_get_session_by_pid(Manager *m, pid_t pid, Session **ret) {
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_cleanup_free_ char *unit = NULL;
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Session *s;
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int r;
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assert(m);
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if (!pid_is_valid(pid))
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return -EINVAL;
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r = cg_pid_get_unit(pid, &unit);
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if (r < 0)
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goto not_found;
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s = hashmap_get(m->session_units, unit);
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if (!s)
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goto not_found;
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if (ret)
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*ret = s;
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return 1;
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not_found:
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if (ret)
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*ret = NULL;
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return 0;
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}
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int manager_get_user_by_pid(Manager *m, pid_t pid, User **ret) {
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_cleanup_free_ char *unit = NULL;
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User *u;
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int r;
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assert(m);
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if (!pid_is_valid(pid))
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return -EINVAL;
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r = cg_pid_get_slice(pid, &unit);
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if (r < 0)
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goto not_found;
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u = hashmap_get(m->user_units, unit);
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if (!u)
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goto not_found;
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if (ret)
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*ret = u;
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return 1;
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not_found:
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if (ret)
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*ret = NULL;
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return 0;
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}
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int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
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Session *s;
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bool idle_hint;
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dual_timestamp ts = DUAL_TIMESTAMP_NULL;
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Iterator i;
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assert(m);
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idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL);
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HASHMAP_FOREACH(s, m->sessions, i) {
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dual_timestamp k;
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int ih;
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ih = session_get_idle_hint(s, &k);
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if (ih < 0)
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return ih;
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if (!ih) {
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if (!idle_hint) {
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if (k.monotonic < ts.monotonic)
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ts = k;
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} else {
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idle_hint = false;
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ts = k;
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}
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} else if (idle_hint) {
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if (k.monotonic > ts.monotonic)
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ts = k;
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}
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}
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if (t)
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*t = ts;
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return idle_hint;
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}
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bool manager_shall_kill(Manager *m, const char *user) {
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assert(m);
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assert(user);
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if (!m->kill_exclude_users && streq(user, "root"))
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return false;
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if (strv_contains(m->kill_exclude_users, user))
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return false;
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if (!strv_isempty(m->kill_only_users))
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return strv_contains(m->kill_only_users, user);
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return m->kill_user_processes;
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}
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int config_parse_n_autovts(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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unsigned *n = data;
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unsigned o;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = safe_atou(rvalue, &o);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse number of autovts, ignoring: %s", rvalue);
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return 0;
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}
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if (o > 15) {
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log_syntax(unit, LOG_ERR, filename, line, r, "A maximum of 15 autovts are supported, ignoring: %s", rvalue);
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return 0;
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}
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*n = o;
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return 0;
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}
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static int vt_is_busy(unsigned int vtnr) {
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struct vt_stat vt_stat;
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int r = 0;
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_cleanup_close_ int fd;
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assert(vtnr >= 1);
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/* VT_GETSTATE "cannot return state for more than 16 VTs, since v_state is short" */
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assert(vtnr <= 15);
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/* We explicitly open /dev/tty1 here instead of /dev/tty0. If
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* we'd open the latter we'd open the foreground tty which
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* hence would be unconditionally busy. By opening /dev/tty1
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* we avoid this. Since tty1 is special and needs to be an
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* explicitly loaded getty or DM this is safe. */
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fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
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if (fd < 0)
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return -errno;
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if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)
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r = -errno;
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else
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r = !!(vt_stat.v_state & (1 << vtnr));
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return r;
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}
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int manager_spawn_autovt(Manager *m, unsigned int vtnr) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
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int r;
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assert(m);
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assert(vtnr >= 1);
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if (vtnr > m->n_autovts &&
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vtnr != m->reserve_vt)
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return 0;
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if (vtnr != m->reserve_vt) {
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/* If this is the reserved TTY, we'll start the getty
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* on it in any case, but otherwise only if it is not
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* busy. */
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r = vt_is_busy(vtnr);
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if (r < 0)
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return r;
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else if (r > 0)
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return -EBUSY;
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}
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snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr);
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r = sd_bus_call_method(
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m->bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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"org.freedesktop.systemd1.Manager",
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"StartUnit",
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&error,
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NULL,
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"ss", name, "fail");
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if (r < 0)
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log_error("Failed to start %s: %s", name, bus_error_message(&error, r));
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return r;
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}
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static bool manager_is_docked(Manager *m) {
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Iterator i;
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Button *b;
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HASHMAP_FOREACH(b, m->buttons, i)
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if (b->docked)
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return true;
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return false;
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}
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static int manager_count_external_displays(Manager *m) {
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_cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
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struct udev_list_entry *item = NULL, *first = NULL;
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int r;
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int n = 0;
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e = udev_enumerate_new(m->udev);
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if (!e)
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return -ENOMEM;
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r = udev_enumerate_add_match_subsystem(e, "drm");
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if (r < 0)
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return r;
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r = udev_enumerate_scan_devices(e);
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if (r < 0)
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return r;
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first = udev_enumerate_get_list_entry(e);
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udev_list_entry_foreach(item, first) {
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_cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
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struct udev_device *p;
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const char *status, *enabled, *dash, *nn, *i;
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bool external = false;
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d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
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if (!d)
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return -ENOMEM;
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p = udev_device_get_parent(d);
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if (!p)
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continue;
|
|
|
|
/* If the parent shares the same subsystem as the
|
|
* device we are looking at then it is a connector,
|
|
* which is what we are interested in. */
|
|
if (!streq_ptr(udev_device_get_subsystem(p), "drm"))
|
|
continue;
|
|
|
|
nn = udev_device_get_sysname(d);
|
|
if (!nn)
|
|
continue;
|
|
|
|
/* Ignore internal displays: the type is encoded in
|
|
* the sysfs name, as the second dash separated item
|
|
* (the first is the card name, the last the connector
|
|
* number). We implement a whitelist of external
|
|
* displays here, rather than a whitelist, to ensure
|
|
* we don't block suspends too eagerly. */
|
|
dash = strchr(nn, '-');
|
|
if (!dash)
|
|
continue;
|
|
|
|
dash++;
|
|
FOREACH_STRING(i, "VGA-", "DVI-I-", "DVI-D-", "DVI-A-"
|
|
"Composite-", "SVIDEO-", "Component-",
|
|
"DIN-", "DP-", "HDMI-A-", "HDMI-B-", "TV-") {
|
|
|
|
if (startswith(dash, i)) {
|
|
external = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!external)
|
|
continue;
|
|
|
|
/* Ignore ports that are not enabled */
|
|
enabled = udev_device_get_sysattr_value(d, "enabled");
|
|
if (!enabled)
|
|
continue;
|
|
if (!streq_ptr(enabled, "enabled"))
|
|
continue;
|
|
|
|
/* We count any connector which is not explicitly
|
|
* "disconnected" as connected. */
|
|
status = udev_device_get_sysattr_value(d, "status");
|
|
if (!streq_ptr(status, "disconnected"))
|
|
n++;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
bool manager_is_docked_or_external_displays(Manager *m) {
|
|
int n;
|
|
|
|
/* If we are docked don't react to lid closing */
|
|
if (manager_is_docked(m)) {
|
|
log_debug("System is docked.");
|
|
return true;
|
|
}
|
|
|
|
/* If we have more than one display connected,
|
|
* assume that we are docked. */
|
|
n = manager_count_external_displays(m);
|
|
if (n < 0)
|
|
log_warning_errno(n, "Display counting failed: %m");
|
|
else if (n >= 1) {
|
|
log_debug("External (%i) displays connected.", n);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool manager_is_on_external_power(void) {
|
|
int r;
|
|
|
|
/* For now we only check for AC power, but 'external power' can apply
|
|
* to anything that isn't an internal battery */
|
|
r = on_ac_power();
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to read AC power status: %m");
|
|
else if (r > 0)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool manager_all_buttons_ignored(Manager *m) {
|
|
assert(m);
|
|
|
|
if (m->handle_power_key != HANDLE_IGNORE)
|
|
return false;
|
|
if (m->handle_suspend_key != HANDLE_IGNORE)
|
|
return false;
|
|
if (m->handle_hibernate_key != HANDLE_IGNORE)
|
|
return false;
|
|
if (m->handle_lid_switch != HANDLE_IGNORE)
|
|
return false;
|
|
if (m->handle_lid_switch_ep != _HANDLE_ACTION_INVALID &&
|
|
m->handle_lid_switch_ep != HANDLE_IGNORE)
|
|
return false;
|
|
if (m->handle_lid_switch_docked != HANDLE_IGNORE)
|
|
return false;
|
|
|
|
return true;
|
|
}
|