diff options
Diffstat (limited to 'src/login/logind.c')
| -rw-r--r-- | src/login/logind.c | 1680 |
1 files changed, 0 insertions, 1680 deletions
diff --git a/src/login/logind.c b/src/login/logind.c deleted file mode 100644 index 9cce481340..0000000000 --- a/src/login/logind.c +++ /dev/null @@ -1,1680 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - 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 <errno.h> -#include <pwd.h> -#include <libudev.h> -#include <fcntl.h> -#include <string.h> -#include <unistd.h> -#include <sys/epoll.h> -#include <sys/ioctl.h> -#include <linux/vt.h> - -#include <systemd/sd-daemon.h> - -#include "logind.h" -#include "dbus-common.h" -#include "dbus-loop.h" -#include "strv.h" -#include "conf-parser.h" - -Manager *manager_new(void) { - Manager *m; - - m = new0(Manager, 1); - if (!m) - return NULL; - - m->console_active_fd = -1; - m->bus_fd = -1; - m->udev_seat_fd = -1; - m->udev_vcsa_fd = -1; - m->udev_button_fd = -1; - m->epoll_fd = -1; - m->reserve_vt_fd = -1; - - m->n_autovts = 6; - m->reserve_vt = 6; - m->inhibit_delay_max = 5 * USEC_PER_SEC; - m->handle_power_key = HANDLE_POWEROFF; - m->handle_suspend_key = HANDLE_SUSPEND; - m->handle_hibernate_key = HANDLE_HIBERNATE; - m->handle_lid_switch = HANDLE_SUSPEND; - m->lid_switch_ignore_inhibited = true; - - m->devices = hashmap_new(string_hash_func, string_compare_func); - m->seats = hashmap_new(string_hash_func, string_compare_func); - m->sessions = hashmap_new(string_hash_func, string_compare_func); - m->users = hashmap_new(trivial_hash_func, trivial_compare_func); - m->inhibitors = hashmap_new(string_hash_func, string_compare_func); - m->buttons = hashmap_new(string_hash_func, string_compare_func); - - m->user_cgroups = hashmap_new(string_hash_func, string_compare_func); - m->session_cgroups = hashmap_new(string_hash_func, string_compare_func); - - m->session_fds = hashmap_new(trivial_hash_func, trivial_compare_func); - m->inhibitor_fds = hashmap_new(trivial_hash_func, trivial_compare_func); - m->button_fds = hashmap_new(trivial_hash_func, trivial_compare_func); - - if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || - !m->user_cgroups || !m->session_cgroups || - !m->session_fds || !m->inhibitor_fds || !m->button_fds) { - manager_free(m); - return NULL; - } - - m->reset_controllers = strv_new("cpu", NULL); - m->kill_exclude_users = strv_new("root", NULL); - if (!m->reset_controllers || !m->kill_exclude_users) { - manager_free(m); - return NULL; - } - - m->udev = udev_new(); - if (!m->udev) { - manager_free(m); - return NULL; - } - - if (cg_get_user_path(&m->cgroup_path) < 0) { - manager_free(m); - return NULL; - } - - return m; -} - -void manager_free(Manager *m) { - Session *session; - User *u; - Device *d; - Seat *s; - Inhibitor *i; - Button *b; - - assert(m); - - while ((session = hashmap_first(m->sessions))) - session_free(session); - - while ((u = hashmap_first(m->users))) - user_free(u); - - while ((d = hashmap_first(m->devices))) - device_free(d); - - while ((s = hashmap_first(m->seats))) - seat_free(s); - - while ((i = hashmap_first(m->inhibitors))) - inhibitor_free(i); - - while ((b = hashmap_first(m->buttons))) - button_free(b); - - hashmap_free(m->devices); - hashmap_free(m->seats); - hashmap_free(m->sessions); - hashmap_free(m->users); - hashmap_free(m->inhibitors); - hashmap_free(m->buttons); - - hashmap_free(m->user_cgroups); - hashmap_free(m->session_cgroups); - - hashmap_free(m->session_fds); - hashmap_free(m->inhibitor_fds); - hashmap_free(m->button_fds); - - if (m->console_active_fd >= 0) - close_nointr_nofail(m->console_active_fd); - - if (m->udev_seat_monitor) - udev_monitor_unref(m->udev_seat_monitor); - if (m->udev_vcsa_monitor) - udev_monitor_unref(m->udev_vcsa_monitor); - if (m->udev_button_monitor) - udev_monitor_unref(m->udev_button_monitor); - - if (m->udev) - udev_unref(m->udev); - - if (m->bus) { - dbus_connection_flush(m->bus); - dbus_connection_close(m->bus); - dbus_connection_unref(m->bus); - } - - if (m->bus_fd >= 0) - close_nointr_nofail(m->bus_fd); - - if (m->epoll_fd >= 0) - close_nointr_nofail(m->epoll_fd); - - if (m->reserve_vt_fd >= 0) - close_nointr_nofail(m->reserve_vt_fd); - - strv_free(m->controllers); - strv_free(m->reset_controllers); - strv_free(m->kill_only_users); - strv_free(m->kill_exclude_users); - - free(m->cgroup_path); - free(m); -} - -int manager_add_device(Manager *m, const char *sysfs, Device **_device) { - Device *d; - - assert(m); - assert(sysfs); - - d = hashmap_get(m->devices, sysfs); - if (d) { - if (_device) - *_device = d; - - return 0; - } - - d = device_new(m, sysfs); - 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) { - if (_seat) - *_seat = s; - - return 0; - } - - s = seat_new(m, id); - if (!s) - return -ENOMEM; - - if (_seat) - *_seat = s; - - return 0; -} - -int manager_add_session(Manager *m, User *u, const char *id, Session **_session) { - Session *s; - - assert(m); - assert(id); - - s = hashmap_get(m->sessions, id); - if (s) { - if (_session) - *_session = s; - - return 0; - } - - s = session_new(m, u, 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; - - assert(m); - assert(name); - - u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); - if (u) { - if (_user) - *_user = u; - - return 0; - } - - u = user_new(m, uid, gid, name); - if (!u) - return -ENOMEM; - - 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 ? -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) { - if (_button) - *_button = b; - - return 0; - } - - 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; - - 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; - } - - r = manager_add_device(m, udev_device_get_syspath(d), &device); - if (r < 0) - return r; - - 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_enumerate_devices(Manager *m) { - struct udev_list_entry *item = NULL, *first = NULL; - struct udev_enumerate *e; - int r; - - assert(m); - - /* Loads devices from udev and creates seats for them as - * necessary */ - - e = udev_enumerate_new(m->udev); - if (!e) { - r = -ENOMEM; - goto finish; - } - - r = udev_enumerate_add_match_subsystem(e, "graphics"); - if (r < 0) - goto finish; - - r = udev_enumerate_add_match_tag(e, "seat"); - if (r < 0) - goto finish; - - r = udev_enumerate_scan_devices(e); - if (r < 0) - goto finish; - - first = udev_enumerate_get_list_entry(e); - udev_list_entry_foreach(item, first) { - struct udev_device *d; - int k; - - d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); - if (!d) { - r = -ENOMEM; - goto finish; - } - - k = manager_process_seat_device(m, d); - udev_device_unref(d); - - if (k < 0) - r = k; - } - -finish: - if (e) - udev_enumerate_unref(e); - - return r; -} - -int manager_enumerate_buttons(Manager *m) { - struct udev_list_entry *item = NULL, *first = NULL; - struct udev_enumerate *e; - int r; - - assert(m); - - /* Loads buttons from udev */ - - if (m->handle_power_key == HANDLE_IGNORE && - m->handle_suspend_key == HANDLE_IGNORE && - m->handle_hibernate_key == HANDLE_IGNORE && - m->handle_lid_switch == HANDLE_IGNORE) - return 0; - - e = udev_enumerate_new(m->udev); - if (!e) { - r = -ENOMEM; - goto finish; - } - - r = udev_enumerate_add_match_subsystem(e, "input"); - if (r < 0) - goto finish; - - r = udev_enumerate_add_match_tag(e, "power-switch"); - if (r < 0) - goto finish; - - r = udev_enumerate_scan_devices(e); - if (r < 0) - goto finish; - - first = udev_enumerate_get_list_entry(e); - udev_list_entry_foreach(item, first) { - struct udev_device *d; - int k; - - d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item)); - if (!d) { - r = -ENOMEM; - goto finish; - } - - k = manager_process_button_device(m, d); - udev_device_unref(d); - - if (k < 0) - r = k; - } - -finish: - if (e) - udev_enumerate_unref(e); - - return r; -} - -int manager_enumerate_seats(Manager *m) { - DIR *d; - struct dirent *de; - int r = 0; - - assert(m); - - /* This loads data about seats stored on disk, but does not - * actually create any seats. Removes data of seats that no - * longer exist. */ - - d = opendir("/run/systemd/seats"); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open /run/systemd/seats: %m"); - return -errno; - } - - while ((de = readdir(d))) { - Seat *s; - int k; - - if (!dirent_is_file(de)) - continue; - - s = hashmap_get(m->seats, de->d_name); - if (!s) { - unlinkat(dirfd(d), de->d_name, 0); - continue; - } - - k = seat_load(s); - if (k < 0) - r = k; - } - - closedir(d); - - return r; -} - -static int manager_enumerate_users_from_cgroup(Manager *m) { - int r = 0, k; - char *name; - DIR *d; - - r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d); - if (r < 0) { - if (r == -ENOENT) - return 0; - - log_error("Failed to open %s: %s", m->cgroup_path, strerror(-r)); - return r; - } - - while ((k = cg_read_subgroup(d, &name)) > 0) { - User *user; - - k = manager_add_user_by_name(m, name, &user); - if (k < 0) { - free(name); - r = k; - continue; - } - - user_add_to_gc_queue(user); - - if (!user->cgroup_path) - if (asprintf(&user->cgroup_path, "%s/%s", m->cgroup_path, name) < 0) { - r = -ENOMEM; - free(name); - break; - } - - free(name); - } - - if (r >= 0 && k < 0) - r = k; - - closedir(d); - - return r; -} - -static int manager_enumerate_linger_users(Manager *m) { - DIR *d; - struct dirent *de; - int r = 0; - - d = opendir("/var/lib/systemd/linger"); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open /var/lib/systemd/linger/: %m"); - return -errno; - } - - while ((de = readdir(d))) { - int k; - - if (!dirent_is_file(de)) - continue; - - k = manager_add_user_by_name(m, de->d_name, NULL); - if (k < 0) { - log_notice("Couldn't add lingering user %s: %s", de->d_name, strerror(-k)); - r = k; - } - } - - closedir(d); - - return r; -} - -int manager_enumerate_users(Manager *m) { - DIR *d; - struct dirent *de; - int r, k; - - assert(m); - - /* First, enumerate user cgroups */ - r = manager_enumerate_users_from_cgroup(m); - - /* Second, add lingering users on top */ - k = manager_enumerate_linger_users(m); - if (k < 0) - r = k; - - /* Third, read in user data stored on disk */ - d = opendir("/run/systemd/users"); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open /run/systemd/users: %m"); - return -errno; - } - - while ((de = readdir(d))) { - uid_t uid; - User *u; - - if (!dirent_is_file(de)) - continue; - - k = parse_uid(de->d_name, &uid); - if (k < 0) { - log_error("Failed to parse file name %s: %s", de->d_name, strerror(-k)); - continue; - } - - u = hashmap_get(m->users, ULONG_TO_PTR(uid)); - if (!u) { - unlinkat(dirfd(d), de->d_name, 0); - continue; - } - - k = user_load(u); - if (k < 0) - r = k; - } - - closedir(d); - - return r; -} - -static int manager_enumerate_sessions_from_cgroup(Manager *m) { - User *u; - Iterator i; - int r = 0; - - HASHMAP_FOREACH(u, m->users, i) { - DIR *d; - char *name; - int k; - - if (!u->cgroup_path) - continue; - - k = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &d); - if (k < 0) { - if (k == -ENOENT) - continue; - - log_error("Failed to open %s: %s", u->cgroup_path, strerror(-k)); - r = k; - continue; - } - - while ((k = cg_read_subgroup(d, &name)) > 0) { - Session *session; - - if (streq(name, "shared")) - continue; - - k = manager_add_session(m, u, name, &session); - if (k < 0) { - free(name); - break; - } - - session_add_to_gc_queue(session); - - if (!session->cgroup_path) - if (asprintf(&session->cgroup_path, "%s/%s", u->cgroup_path, name) < 0) { - k = -ENOMEM; - free(name); - break; - } - - free(name); - } - - closedir(d); - - if (k < 0) - r = k; - } - - return r; -} - -int manager_enumerate_sessions(Manager *m) { - DIR *d; - struct dirent *de; - int r = 0; - - assert(m); - - /* First enumerate session cgroups */ - r = manager_enumerate_sessions_from_cgroup(m); - - /* Second, read in session data stored on disk */ - d = opendir("/run/systemd/sessions"); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open /run/systemd/sessions: %m"); - return -errno; - } - - while ((de = readdir(d))) { - struct Session *s; - int k; - - if (!dirent_is_file(de)) - continue; - - s = hashmap_get(m->sessions, de->d_name); - if (!s) { - unlinkat(dirfd(d), de->d_name, 0); - continue; - } - - k = session_load(s); - if (k < 0) - r = k; - } - - closedir(d); - - return r; -} - -int manager_enumerate_inhibitors(Manager *m) { - DIR *d; - struct dirent *de; - int r = 0; - - assert(m); - - d = opendir("/run/systemd/inhibit"); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open /run/systemd/inhibit: %m"); - return -errno; - } - - while ((de = readdir(d))) { - int k; - Inhibitor *i; - - if (!dirent_is_file(de)) - continue; - - k = manager_add_inhibitor(m, de->d_name, &i); - if (k < 0) { - log_notice("Couldn't add inhibitor %s: %s", de->d_name, strerror(-k)); - r = k; - continue; - } - - k = inhibitor_load(i); - if (k < 0) - r = k; - } - - closedir(d); - - return r; -} - -int manager_dispatch_seat_udev(Manager *m) { - struct udev_device *d; - int r; - - assert(m); - - d = udev_monitor_receive_device(m->udev_seat_monitor); - if (!d) - return -ENOMEM; - - r = manager_process_seat_device(m, d); - udev_device_unref(d); - - return r; -} - -int manager_dispatch_vcsa_udev(Manager *m) { - struct udev_device *d; - int r = 0; - const char *name; - - assert(m); - - d = udev_monitor_receive_device(m->udev_vcsa_monitor); - if (!d) - return -ENOMEM; - - name = udev_device_get_sysname(d); - - /* Whenever a VCSA device is removed try to reallocate our - * VTs, to make sure our auto VTs never go away. */ - - if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove")) - r = seat_preallocate_vts(m->vtconsole); - - udev_device_unref(d); - - return r; -} - -int manager_dispatch_button_udev(Manager *m) { - struct udev_device *d; - int r; - - assert(m); - - d = udev_monitor_receive_device(m->udev_button_monitor); - if (!d) - return -ENOMEM; - - r = manager_process_button_device(m, d); - udev_device_unref(d); - - return r; -} - -int manager_dispatch_console(Manager *m) { - assert(m); - - if (m->vtconsole) - seat_read_active_vt(m->vtconsole); - - return 0; -} - -static int vt_is_busy(int vtnr) { - struct vt_stat vt_stat; - int r = 0, 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)); - - close_nointr_nofail(fd); - - return r; -} - -int manager_spawn_autovt(Manager *m, int vtnr) { - int r; - char *name = NULL; - const char *mode = "fail"; - - assert(m); - assert(vtnr >= 1); - - if ((unsigned) vtnr > m->n_autovts && - (unsigned) vtnr != m->reserve_vt) - return 0; - - if ((unsigned) 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; - } - - if (asprintf(&name, "autovt@tty%i.service", vtnr) < 0) { - log_error("Could not allocate service name."); - r = -ENOMEM; - goto finish; - } - - r = bus_method_call_with_reply ( - m->bus, - "org.freedesktop.systemd1", - "/org/freedesktop/systemd1", - "org.freedesktop.systemd1.Manager", - "StartUnit", - NULL, - NULL, - DBUS_TYPE_STRING, &name, - DBUS_TYPE_STRING, &mode, - DBUS_TYPE_INVALID); - -finish: - free(name); - - return r; -} - -static int manager_reserve_vt(Manager *m) { - _cleanup_free_ char *p = NULL; - - assert(m); - - if (m->reserve_vt <= 0) - return 0; - - if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0) - return log_oom(); - - m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK); - if (m->reserve_vt_fd < 0) { - - /* Don't complain on VT-less systems */ - if (errno != ENOENT) - log_warning("Failed to pin reserved VT: %m"); - return -errno; - } - - return 0; -} - -int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **session) { - Session *s; - char *p; - - assert(m); - assert(cgroup); - assert(session); - - s = hashmap_get(m->session_cgroups, cgroup); - if (s) { - *session = s; - return 1; - } - - p = strdup(cgroup); - if (!p) - return log_oom(); - - for (;;) { - char *e; - - e = strrchr(p, '/'); - if (!e || e == p) { - free(p); - *session = NULL; - return 0; - } - - *e = 0; - - s = hashmap_get(m->session_cgroups, p); - if (s) { - free(p); - *session = s; - return 1; - } - } -} - -int manager_get_user_by_cgroup(Manager *m, const char *cgroup, User **user) { - User *u; - char *p; - - assert(m); - assert(cgroup); - assert(user); - - u = hashmap_get(m->user_cgroups, cgroup); - if (u) { - *user = u; - return 1; - } - - p = strdup(cgroup); - if (!p) - return log_oom(); - - for (;;) { - char *e; - - e = strrchr(p, '/'); - if (!e || e == p) { - free(p); - *user = NULL; - return 0; - } - - *e = 0; - - u = hashmap_get(m->user_cgroups, p); - if (u) { - free(p); - *user = u; - return 1; - } - } -} - -int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { - char *p; - int r; - - assert(m); - assert(pid >= 1); - assert(session); - - r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &p); - if (r < 0) - return r; - - r = manager_get_session_by_cgroup(m, p, session); - free(p); - - return r; -} - -void manager_cgroup_notify_empty(Manager *m, const char *cgroup) { - Session *s; - User *u; - int r; - - r = manager_get_session_by_cgroup(m, cgroup, &s); - if (r > 0) - session_add_to_gc_queue(s); - - r = manager_get_user_by_cgroup(m, cgroup, &u); - if (r > 0) - user_add_to_gc_queue(u); -} - -static void manager_dispatch_other(Manager *m, int fd) { - Session *s; - Inhibitor *i; - Button *b; - - assert_se(m); - assert_se(fd >= 0); - - s = hashmap_get(m->session_fds, INT_TO_PTR(fd + 1)); - if (s) { - assert(s->fifo_fd == fd); - session_remove_fifo(s); - session_stop(s); - return; - } - - i = hashmap_get(m->inhibitor_fds, INT_TO_PTR(fd + 1)); - if (i) { - assert(i->fifo_fd == fd); - inhibitor_stop(i); - inhibitor_free(i); - return; - } - - b = hashmap_get(m->button_fds, INT_TO_PTR(fd + 1)); - if (b) { - assert(b->fd == fd); - button_process(b); - return; - } - - assert_not_reached("Got event for unknown fd"); -} - -static int manager_connect_bus(Manager *m) { - DBusError error; - int r; - struct epoll_event ev; - - assert(m); - assert(!m->bus); - assert(m->bus_fd < 0); - - dbus_error_init(&error); - - m->bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error); - if (!m->bus) { - log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error)); - r = -ECONNREFUSED; - goto fail; - } - - if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/login1", &bus_manager_vtable, m) || - !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/seat", &bus_seat_vtable, m) || - !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/session", &bus_session_vtable, m) || - !dbus_connection_register_fallback(m->bus, "/org/freedesktop/login1/user", &bus_user_vtable, m) || - !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) { - r = log_oom(); - goto fail; - } - - dbus_bus_add_match(m->bus, - "type='signal'," - "interface='org.freedesktop.systemd1.Agent'," - "member='Released'," - "path='/org/freedesktop/systemd1/agent'", - &error); - - if (dbus_error_is_set(&error)) { - log_error("Failed to register match: %s", bus_error_message(&error)); - r = -EIO; - goto fail; - } - - r = dbus_bus_request_name(m->bus, "org.freedesktop.login1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error); - if (dbus_error_is_set(&error)) { - log_error("Failed to register name on bus: %s", bus_error_message(&error)); - r = -EIO; - goto fail; - } - - if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { - log_error("Failed to acquire name."); - r = -EEXIST; - goto fail; - } - - m->bus_fd = bus_loop_open(m->bus); - if (m->bus_fd < 0) { - r = m->bus_fd; - goto fail; - } - - zero(ev); - ev.events = EPOLLIN; - ev.data.u32 = FD_BUS; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->bus_fd, &ev) < 0) - goto fail; - - return 0; - -fail: - dbus_error_free(&error); - - return r; -} - -static int manager_connect_console(Manager *m) { - struct epoll_event ev; - - assert(m); - assert(m->console_active_fd < 0); - - /* On certain architectures (S390 and Xen, and containers), - /dev/tty0 does not exist, so don't fail if we can't open - it. */ - if (access("/dev/tty0", F_OK) < 0) { - m->console_active_fd = -1; - return 0; - } - - m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC); - if (m->console_active_fd < 0) { - - /* On some systems the device node /dev/tty0 may exist - * even though /sys/class/tty/tty0 does not. */ - if (errno == ENOENT) - return 0; - - log_error("Failed to open /sys/class/tty/tty0/active: %m"); - return -errno; - } - - zero(ev); - ev.events = 0; - ev.data.u32 = FD_CONSOLE; - - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->console_active_fd, &ev) < 0) - return -errno; - - return 0; -} - -static int manager_connect_udev(Manager *m) { - struct epoll_event ev; - int r; - - assert(m); - assert(!m->udev_seat_monitor); - assert(!m->udev_vcsa_monitor); - assert(!m->udev_button_monitor); - - m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); - if (!m->udev_seat_monitor) - return -ENOMEM; - - r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "seat"); - if (r < 0) - return r; - - r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_seat_monitor, "graphics", NULL); - if (r < 0) - return r; - - r = udev_monitor_enable_receiving(m->udev_seat_monitor); - if (r < 0) - return r; - - m->udev_seat_fd = udev_monitor_get_fd(m->udev_seat_monitor); - - zero(ev); - ev.events = EPOLLIN; - ev.data.u32 = FD_SEAT_UDEV; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_seat_fd, &ev) < 0) - return -errno; - - /* Don't watch keys if nobody cares */ - if (m->handle_power_key != HANDLE_IGNORE || - m->handle_suspend_key != HANDLE_IGNORE || - m->handle_hibernate_key != HANDLE_IGNORE || - m->handle_lid_switch != HANDLE_IGNORE) { - - m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); - if (!m->udev_button_monitor) - return -ENOMEM; - - r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch"); - if (r < 0) - return r; - - r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL); - if (r < 0) - return r; - - r = udev_monitor_enable_receiving(m->udev_button_monitor); - if (r < 0) - return r; - - m->udev_button_fd = udev_monitor_get_fd(m->udev_button_monitor); - - zero(ev); - ev.events = EPOLLIN; - ev.data.u32 = FD_BUTTON_UDEV; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_button_fd, &ev) < 0) - return -errno; - } - - /* Don't bother watching VCSA devices, if nobody cares */ - if (m->n_autovts > 0 && m->console_active_fd >= 0) { - - m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); - if (!m->udev_vcsa_monitor) - return -ENOMEM; - - r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL); - if (r < 0) - return r; - - r = udev_monitor_enable_receiving(m->udev_vcsa_monitor); - if (r < 0) - return r; - - m->udev_vcsa_fd = udev_monitor_get_fd(m->udev_vcsa_monitor); - - zero(ev); - ev.events = EPOLLIN; - ev.data.u32 = FD_VCSA_UDEV; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_vcsa_fd, &ev) < 0) - return -errno; - } - - return 0; -} - -void manager_gc(Manager *m, bool drop_not_started) { - Seat *seat; - Session *session; - User *user; - - assert(m); - - while ((seat = m->seat_gc_queue)) { - LIST_REMOVE(Seat, gc_queue, m->seat_gc_queue, seat); - seat->in_gc_queue = false; - - if (seat_check_gc(seat, drop_not_started) == 0) { - seat_stop(seat); - seat_free(seat); - } - } - - while ((session = m->session_gc_queue)) { - LIST_REMOVE(Session, gc_queue, m->session_gc_queue, session); - session->in_gc_queue = false; - - if (session_check_gc(session, drop_not_started) == 0) { - session_stop(session); - session_free(session); - } - } - - while ((user = m->user_gc_queue)) { - LIST_REMOVE(User, gc_queue, m->user_gc_queue, user); - user->in_gc_queue = false; - - if (user_check_gc(user, drop_not_started) == 0) { - user_stop(user); - user_free(user); - } - } -} - -int manager_get_idle_hint(Manager *m, dual_timestamp *t) { - Session *s; - bool idle_hint; - dual_timestamp ts = { 0, 0 }; - Iterator i; - - assert(m); - - idle_hint = !manager_is_inhibited(m, INHIBIT_IDLE, INHIBIT_BLOCK, t, false, false, 0); - - 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; -} - -int manager_startup(Manager *m) { - int r; - Seat *seat; - Session *session; - User *user; - Inhibitor *inhibitor; - Iterator i; - - assert(m); - assert(m->epoll_fd <= 0); - - cg_shorten_controllers(m->reset_controllers); - cg_shorten_controllers(m->controllers); - - m->epoll_fd = epoll_create1(EPOLL_CLOEXEC); - if (m->epoll_fd < 0) - return -errno; - - /* Connect to console */ - r = manager_connect_console(m); - if (r < 0) - return r; - - /* Connect to udev */ - r = manager_connect_udev(m); - if (r < 0) - return r; - - /* Connect to the bus */ - r = manager_connect_bus(m); - if (r < 0) - return r; - - /* Instantiate magic seat 0 */ - r = manager_add_seat(m, "seat0", &m->vtconsole); - if (r < 0) - return r; - - /* Deserialize state */ - manager_enumerate_devices(m); - manager_enumerate_seats(m); - manager_enumerate_users(m); - manager_enumerate_sessions(m); - manager_enumerate_inhibitors(m); - manager_enumerate_buttons(m); - - /* Remove stale objects before we start them */ - manager_gc(m, false); - - /* Reserve the special reserved VT */ - manager_reserve_vt(m); - - /* And start everything */ - HASHMAP_FOREACH(seat, m->seats, i) - seat_start(seat); - - HASHMAP_FOREACH(user, m->users, i) - user_start(user); - - HASHMAP_FOREACH(session, m->sessions, i) - session_start(session); - - HASHMAP_FOREACH(inhibitor, m->inhibitors, i) - inhibitor_start(inhibitor); - - return 0; -} - -static int manager_recheck_buttons(Manager *m) { - Iterator i; - Button *b; - int r = 0; - - assert(m); - - HASHMAP_FOREACH(b, m->buttons, i) { - int q; - - q = button_recheck(b); - if (q > 0) - return 1; - if (q < 0) - r = q; - } - - return r; -} - -int manager_run(Manager *m) { - assert(m); - - for (;;) { - struct epoll_event event; - int n; - int msec = -1; - - manager_gc(m, true); - - if (manager_dispatch_delayed(m) > 0) - continue; - - if (manager_recheck_buttons(m) > 0) - continue; - - if (dbus_connection_dispatch(m->bus) != DBUS_DISPATCH_COMPLETE) - continue; - - manager_gc(m, true); - - if (m->delayed_unit) { - usec_t x, y; - - x = now(CLOCK_MONOTONIC); - y = m->delayed_timestamp + m->inhibit_delay_max; - - msec = x >= y ? 0 : (int) ((y - x) / USEC_PER_MSEC); - } - - n = epoll_wait(m->epoll_fd, &event, 1, msec); - if (n < 0) { - if (errno == EINTR || errno == EAGAIN) - continue; - - log_error("epoll() failed: %m"); - return -errno; - } - - if (n == 0) - continue; - - switch (event.data.u32) { - - case FD_SEAT_UDEV: - manager_dispatch_seat_udev(m); - break; - - case FD_VCSA_UDEV: - manager_dispatch_vcsa_udev(m); - break; - - case FD_BUTTON_UDEV: - manager_dispatch_button_udev(m); - break; - - case FD_CONSOLE: - manager_dispatch_console(m); - break; - - case FD_BUS: - bus_loop_dispatch(m->bus_fd); - break; - - default: - if (event.data.u32 >= FD_OTHER_BASE) - manager_dispatch_other(m, event.data.u32 - FD_OTHER_BASE); - } - } - - return 0; -} - -static int manager_parse_config_file(Manager *m) { - FILE *f; - const char *fn; - int r; - - assert(m); - - fn = "/etc/systemd/logind.conf"; - f = fopen(fn, "re"); - if (!f) { - if (errno == ENOENT) - return 0; - - log_warning("Failed to open configuration file %s: %m", fn); - return -errno; - } - - r = config_parse(fn, f, "Login\0", config_item_perf_lookup, (void*) logind_gperf_lookup, false, m); - if (r < 0) - log_warning("Failed to parse configuration file: %s", strerror(-r)); - - fclose(f); - - return r; -} - -int main(int argc, char *argv[]) { - Manager *m = NULL; - int r; - - log_set_target(LOG_TARGET_AUTO); - log_set_facility(LOG_AUTH); - log_parse_environment(); - log_open(); - - umask(0022); - - if (argc != 1) { - log_error("This program takes no arguments."); - r = -EINVAL; - goto finish; - } - - m = manager_new(); - if (!m) { - r = log_oom(); - goto finish; - } - - manager_parse_config_file(m); - - r = manager_startup(m); - if (r < 0) { - log_error("Failed to fully start up daemon: %s", strerror(-r)); - goto finish; - } - - log_debug("systemd-logind running as pid %lu", (unsigned long) getpid()); - - sd_notify(false, - "READY=1\n" - "STATUS=Processing requests..."); - - r = manager_run(m); - - log_debug("systemd-logind stopped as pid %lu", (unsigned long) getpid()); - -finish: - sd_notify(false, - "STATUS=Shutting down..."); - - if (m) - manager_free(m); - - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} |