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Diffstat (limited to 'src/grp-login/systemd-logind/logind-core.c')
-rw-r--r--src/grp-login/systemd-logind/logind-core.c560
1 files changed, 560 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/logind-core.c b/src/grp-login/systemd-logind/logind-core.c
new file mode 100644
index 0000000000..b4bb502aac
--- /dev/null
+++ b/src/grp-login/systemd-logind/logind-core.c
@@ -0,0 +1,560 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <pwd.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <linux/vt.h>
+
+#include "sd-bus/bus-error.h"
+#include "sd-bus/bus-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/cgroup-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/terminal-util.h"
+#include "systemd-basic/user-util.h"
+#include "systemd-shared/udev-util.h"
+
+#include "logind.h"
+
+int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) {
+ Device *d;
+
+ assert(m);
+ assert(sysfs);
+
+ d = hashmap_get(m->devices, sysfs);
+ if (d)
+ /* we support adding master-flags, but not removing them */
+ d->master = d->master || master;
+ else {
+ d = device_new(m, sysfs, master);
+ if (!d)
+ return -ENOMEM;
+ }
+
+ if (_device)
+ *_device = d;
+
+ return 0;
+}
+
+int manager_add_seat(Manager *m, const char *id, Seat **_seat) {
+ Seat *s;
+
+ assert(m);
+ assert(id);
+
+ s = hashmap_get(m->seats, id);
+ if (!s) {
+ s = seat_new(m, id);
+ if (!s)
+ return -ENOMEM;
+ }
+
+ if (_seat)
+ *_seat = s;
+
+ return 0;
+}
+
+int manager_add_session(Manager *m, const char *id, Session **_session) {
+ Session *s;
+
+ assert(m);
+ assert(id);
+
+ s = hashmap_get(m->sessions, id);
+ if (!s) {
+ s = session_new(m, id);
+ if (!s)
+ return -ENOMEM;
+ }
+
+ if (_session)
+ *_session = s;
+
+ return 0;
+}
+
+int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user) {
+ User *u;
+ int r;
+
+ assert(m);
+ assert(name);
+
+ u = hashmap_get(m->users, UID_TO_PTR(uid));
+ if (!u) {
+ r = user_new(&u, m, uid, gid, name);
+ if (r < 0)
+ return r;
+ }
+
+ if (_user)
+ *_user = u;
+
+ return 0;
+}
+
+int manager_add_user_by_name(Manager *m, const char *name, User **_user) {
+ uid_t uid;
+ gid_t gid;
+ int r;
+
+ assert(m);
+ assert(name);
+
+ r = get_user_creds(&name, &uid, &gid, NULL, NULL);
+ if (r < 0)
+ return r;
+
+ return manager_add_user(m, uid, gid, name, _user);
+}
+
+int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
+ struct passwd *p;
+
+ assert(m);
+
+ errno = 0;
+ p = getpwuid(uid);
+ if (!p)
+ return errno > 0 ? -errno : -ENOENT;
+
+ return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
+}
+
+int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
+ Inhibitor *i;
+
+ assert(m);
+ assert(id);
+
+ i = hashmap_get(m->inhibitors, id);
+ if (i) {
+ if (_inhibitor)
+ *_inhibitor = i;
+
+ return 0;
+ }
+
+ i = inhibitor_new(m, id);
+ if (!i)
+ return -ENOMEM;
+
+ if (_inhibitor)
+ *_inhibitor = i;
+
+ return 0;
+}
+
+int manager_add_button(Manager *m, const char *name, Button **_button) {
+ Button *b;
+
+ assert(m);
+ assert(name);
+
+ b = hashmap_get(m->buttons, name);
+ if (!b) {
+ b = button_new(m, name);
+ if (!b)
+ return -ENOMEM;
+ }
+
+ if (_button)
+ *_button = b;
+
+ return 0;
+}
+
+int manager_process_seat_device(Manager *m, struct udev_device *d) {
+ Device *device;
+ int r;
+
+ assert(m);
+
+ if (streq_ptr(udev_device_get_action(d), "remove")) {
+
+ device = hashmap_get(m->devices, udev_device_get_syspath(d));
+ if (!device)
+ return 0;
+
+ seat_add_to_gc_queue(device->seat);
+ device_free(device);
+
+ } else {
+ const char *sn;
+ Seat *seat = NULL;
+ bool master;
+
+ sn = udev_device_get_property_value(d, "ID_SEAT");
+ if (isempty(sn))
+ sn = "seat0";
+
+ if (!seat_name_is_valid(sn)) {
+ log_warning("Device with invalid seat name %s found, ignoring.", sn);
+ return 0;
+ }
+
+ seat = hashmap_get(m->seats, sn);
+ master = udev_device_has_tag(d, "master-of-seat");
+
+ /* Ignore non-master devices for unknown seats */
+ if (!master && !seat)
+ return 0;
+
+ r = manager_add_device(m, udev_device_get_syspath(d), master, &device);
+ if (r < 0)
+ return r;
+
+ if (!seat) {
+ r = manager_add_seat(m, sn, &seat);
+ if (r < 0) {
+ if (!device->seat)
+ device_free(device);
+
+ return r;
+ }
+ }
+
+ device_attach(device, seat);
+ seat_start(seat);
+ }
+
+ return 0;
+}
+
+int manager_process_button_device(Manager *m, struct udev_device *d) {
+ Button *b;
+
+ int r;
+
+ assert(m);
+
+ if (streq_ptr(udev_device_get_action(d), "remove")) {
+
+ b = hashmap_get(m->buttons, udev_device_get_sysname(d));
+ if (!b)
+ return 0;
+
+ button_free(b);
+
+ } else {
+ const char *sn;
+
+ r = manager_add_button(m, udev_device_get_sysname(d), &b);
+ if (r < 0)
+ return r;
+
+ sn = udev_device_get_property_value(d, "ID_SEAT");
+ if (isempty(sn))
+ sn = "seat0";
+
+ button_set_seat(b, sn);
+ button_open(b);
+ }
+
+ return 0;
+}
+
+int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
+ _cleanup_free_ char *unit = NULL;
+ Session *s;
+ int r;
+
+ assert(m);
+
+ if (pid < 1)
+ return -EINVAL;
+
+ r = cg_pid_get_unit(pid, &unit);
+ if (r < 0)
+ return 0;
+
+ s = hashmap_get(m->session_units, unit);
+ if (!s)
+ return 0;
+
+ if (session)
+ *session = s;
+ return 1;
+}
+
+int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
+ _cleanup_free_ char *unit = NULL;
+ User *u;
+ int r;
+
+ assert(m);
+ assert(user);
+
+ if (pid < 1)
+ return -EINVAL;
+
+ r = cg_pid_get_slice(pid, &unit);
+ if (r < 0)
+ return 0;
+
+ u = hashmap_get(m->user_units, unit);
+ if (!u)
+ return 0;
+
+ *user = u;
+ return 1;
+}
+
+int manager_get_idle_hint(Manager *m, dual_timestamp *t) {
+ Session *s;
+ bool idle_hint;
+ dual_timestamp ts = DUAL_TIMESTAMP_NULL;
+ Iterator i;
+
+ assert(m);
+
+ idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0, NULL);
+
+ HASHMAP_FOREACH(s, m->sessions, i) {
+ dual_timestamp k;
+ int ih;
+
+ ih = session_get_idle_hint(s, &k);
+ if (ih < 0)
+ return ih;
+
+ if (!ih) {
+ if (!idle_hint) {
+ if (k.monotonic < ts.monotonic)
+ ts = k;
+ } else {
+ idle_hint = false;
+ ts = k;
+ }
+ } else if (idle_hint) {
+
+ if (k.monotonic > ts.monotonic)
+ ts = k;
+ }
+ }
+
+ if (t)
+ *t = ts;
+
+ return idle_hint;
+}
+
+bool manager_shall_kill(Manager *m, const char *user) {
+ assert(m);
+ assert(user);
+
+ if (!m->kill_exclude_users && streq(user, "root"))
+ return false;
+
+ if (strv_contains(m->kill_exclude_users, user))
+ return false;
+
+ if (!strv_isempty(m->kill_only_users))
+ return strv_contains(m->kill_only_users, user);
+
+ return m->kill_user_processes;
+}
+
+static int vt_is_busy(unsigned int vtnr) {
+ struct vt_stat vt_stat;
+ int r = 0;
+ _cleanup_close_ int fd;
+
+ assert(vtnr >= 1);
+
+ /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
+ * we'd open the latter we'd open the foreground tty which
+ * hence would be unconditionally busy. By opening /dev/tty1
+ * we avoid this. Since tty1 is special and needs to be an
+ * explicitly loaded getty or DM this is safe. */
+
+ fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ if (ioctl(fd, VT_GETSTATE, &vt_stat) < 0)
+ r = -errno;
+ else
+ r = !!(vt_stat.v_state & (1 << vtnr));
+
+ return r;
+}
+
+int manager_spawn_autovt(Manager *m, unsigned int vtnr) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
+ int r;
+
+ assert(m);
+ assert(vtnr >= 1);
+
+ if (vtnr > m->n_autovts &&
+ vtnr != m->reserve_vt)
+ return 0;
+
+ if (vtnr != m->reserve_vt) {
+ /* If this is the reserved TTY, we'll start the getty
+ * on it in any case, but otherwise only if it is not
+ * busy. */
+
+ r = vt_is_busy(vtnr);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ return -EBUSY;
+ }
+
+ snprintf(name, sizeof(name), "autovt@tty%u.service", vtnr);
+ r = sd_bus_call_method(
+ m->bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "StartUnit",
+ &error,
+ NULL,
+ "ss", name, "fail");
+ if (r < 0)
+ log_error("Failed to start %s: %s", name, bus_error_message(&error, r));
+
+ return r;
+}
+
+static bool manager_is_docked(Manager *m) {
+ Iterator i;
+ Button *b;
+
+ HASHMAP_FOREACH(b, m->buttons, i)
+ if (b->docked)
+ return true;
+
+ return false;
+}
+
+static int manager_count_external_displays(Manager *m) {
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+ int r;
+ int n = 0;
+
+ e = udev_enumerate_new(m->udev);
+ if (!e)
+ return -ENOMEM;
+
+ r = udev_enumerate_add_match_subsystem(e, "drm");
+ if (r < 0)
+ return r;
+
+ r = udev_enumerate_scan_devices(e);
+ if (r < 0)
+ return r;
+
+ first = udev_enumerate_get_list_entry(e);
+ udev_list_entry_foreach(item, first) {
+ _cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ struct udev_device *p;
+ const char *status, *enabled, *dash, *nn, *i;
+ bool external = false;
+
+ d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
+ if (!d)
+ return -ENOMEM;
+
+ p = udev_device_get_parent(d);
+ if (!p)
+ 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;
+}
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