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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include "logind-user.h"
28 #include "cgroup-util.h"
32 User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
42 u->name = strdup(name);
48 if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0) {
54 if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0) {
68 void user_free(User *u) {
72 LIST_REMOVE(User, gc_queue, u->manager->user_gc_queue, u);
75 session_free(u->sessions);
80 free(u->runtime_path);
82 hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
89 int user_save(User *u) {
95 assert(u->state_file);
100 r = safe_mkdir("/run/systemd/users", 0755, 0, 0);
104 r = fopen_temporary(u->state_file, &f, &temp_path);
108 fchmod(fileno(f), 0644);
111 "# This is private data. Do not parse.\n"
115 user_state_to_string(user_get_state(u)));
140 fputs("SESSIONS=", f);
141 LIST_FOREACH(sessions_by_user, i, u->sessions) {
145 i->sessions_by_user_next ? ' ' : '\n');
149 LIST_FOREACH(sessions_by_user, i, u->sessions) {
154 i->sessions_by_user_next ? ' ' : '\n');
157 fputs("ACTIVE_SESSIONS=", f);
158 LIST_FOREACH(sessions_by_user, i, u->sessions)
159 if (session_is_active(i))
162 (unsigned long) i->user->uid,
163 i->sessions_by_user_next ? ' ' : '\n');
165 fputs("ACTIVE_SEATS=", f);
166 LIST_FOREACH(sessions_by_user, i, u->sessions) {
167 if (session_is_active(i) && i->seat)
171 i->sessions_by_user_next ? ' ' : '\n');
177 if (ferror(f) || rename(temp_path, u->state_file) < 0) {
179 unlink(u->state_file);
188 log_error("Failed to save user data for %s: %s", u->name, strerror(-r));
193 int user_load(User *u) {
195 char *display = NULL;
200 r = parse_env_file(u->state_file, NEWLINE,
201 "CGROUP", &u->cgroup_path,
202 "RUNTIME", &u->runtime_path,
203 "SERVICE", &u->service,
212 log_error("Failed to read %s: %s", u->state_file, strerror(-r));
217 s = hashmap_get(u->manager->sessions, display);
221 if (s && s->display && display_is_local(s->display))
227 static int user_mkdir_runtime_path(User *u) {
233 r = safe_mkdir("/run/user", 0755, 0, 0);
235 log_error("Failed to create /run/user: %s", strerror(-r));
239 if (!u->runtime_path) {
240 p = strappend("/run/user/", u->name);
243 log_error("Out of memory");
249 r = safe_mkdir(p, 0700, u->uid, u->gid);
251 log_error("Failed to create runtime directory %s: %s", p, strerror(-r));
253 u->runtime_path = NULL;
261 static int user_create_cgroup(User *u) {
268 if (!u->cgroup_path) {
269 if (asprintf(&p, "%s/%s", u->manager->cgroup_path, u->name) < 0) {
270 log_error("Out of memory");
276 r = cg_create(SYSTEMD_CGROUP_CONTROLLER, p);
278 log_error("Failed to create cgroup "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
280 u->cgroup_path = NULL;
286 STRV_FOREACH(k, u->manager->controllers) {
288 if (strv_contains(u->manager->reset_controllers, *k))
291 r = cg_create(*k, p);
293 log_warning("Failed to create cgroup %s:%s: %s", *k, p, strerror(-r));
299 static int user_start_service(User *u) {
305 int user_start(User *u) {
313 log_info("New user %s logged in.", u->name);
315 /* Make XDG_RUNTIME_DIR */
316 r = user_mkdir_runtime_path(u);
321 r = user_create_cgroup(u);
325 /* Spawn user systemd */
326 r = user_start_service(u);
330 dual_timestamp_get(&u->timestamp);
334 /* Save new user data */
337 user_send_signal(u, true);
342 static int user_stop_service(User *u) {
351 static int user_shall_kill(User *u) {
354 if (!u->manager->kill_user_processes)
357 if (strv_contains(u->manager->kill_exclude_users, u->name))
360 if (strv_isempty(u->manager->kill_only_users))
363 return strv_contains(u->manager->kill_only_users, u->name);
366 static int user_terminate_cgroup(User *u) {
375 cg_trim(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
377 if (user_shall_kill(u)) {
379 r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
381 log_error("Failed to kill user cgroup: %s", strerror(-r));
384 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
386 log_error("Failed to check user cgroup: %s", strerror(-r));
388 r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
390 log_error("Failed to delete user cgroup: %s", strerror(-r));
395 STRV_FOREACH(k, u->manager->controllers)
396 cg_trim(*k, u->cgroup_path, true);
398 free(u->cgroup_path);
399 u->cgroup_path = NULL;
404 static int user_remove_runtime_path(User *u) {
409 if (!u->runtime_path)
412 r = rm_rf(u->runtime_path, false, true, false);
414 log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
416 free(u->runtime_path);
417 u->runtime_path = NULL;
422 int user_stop(User *u) {
428 log_info("User %s logged out.", u->name);
430 LIST_FOREACH(sessions_by_user, s, u->sessions) {
437 k = user_stop_service(u);
442 k = user_terminate_cgroup(u);
446 /* Kill XDG_RUNTIME_DIR */
447 k = user_remove_runtime_path(u);
451 unlink(u->state_file);
452 user_add_to_gc_queue(u);
455 user_send_signal(u, false);
462 int user_get_idle_hint(User *u, dual_timestamp *t) {
464 bool idle_hint = true;
465 dual_timestamp ts = { 0, 0 };
469 LIST_FOREACH(sessions_by_user, s, u->sessions) {
473 ih = session_get_idle_hint(s, &k);
479 if (k.monotonic < ts.monotonic)
485 } else if (idle_hint) {
487 if (k.monotonic > ts.monotonic)
498 int user_check_gc(User *u, bool drop_not_started) {
504 if (drop_not_started && !u->started)
510 if (asprintf(&p, "/var/lib/systemd/linger/%s", u->name) < 0)
513 r = access(p, F_OK) >= 0;
519 if (u->cgroup_path) {
520 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
531 void user_add_to_gc_queue(User *u) {
537 LIST_PREPEND(User, gc_queue, u->manager->user_gc_queue, u);
538 u->in_gc_queue = true;
541 UserState user_get_state(User *u) {
547 return USER_LINGERING;
549 LIST_FOREACH(sessions_by_user, i, u->sessions)
550 if (session_is_active(i))
556 int user_kill(User *u, int signo) {
565 pid_set = set_new(trivial_hash_func, trivial_compare_func);
569 q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
571 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
580 static const char* const user_state_table[_USER_STATE_MAX] = {
581 [USER_OFFLINE] = "offline",
582 [USER_LINGERING] = "lingering",
583 [USER_ONLINE] = "online",
584 [USER_ACTIVE] = "active"
587 DEFINE_STRING_TABLE_LOOKUP(user_state, UserState);