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"
29 #include "cgroup-util.h"
33 User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
43 u->name = strdup(name);
49 if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0) {
55 if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0) {
69 void user_free(User *u) {
73 LIST_REMOVE(User, gc_queue, u->manager->user_gc_queue, u);
76 session_free(u->sessions);
81 free(u->runtime_path);
83 hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
90 int user_save(User *u) {
96 assert(u->state_file);
101 r = safe_mkdir("/run/systemd/users", 0755, 0, 0);
105 r = fopen_temporary(u->state_file, &f, &temp_path);
109 fchmod(fileno(f), 0644);
112 "# This is private data. Do not parse.\n"
116 user_state_to_string(user_get_state(u)));
141 fputs("SESSIONS=", f);
142 LIST_FOREACH(sessions_by_user, i, u->sessions) {
146 i->sessions_by_user_next ? ' ' : '\n');
150 LIST_FOREACH(sessions_by_user, i, u->sessions) {
155 i->sessions_by_user_next ? ' ' : '\n');
158 fputs("ACTIVE_SESSIONS=", f);
159 LIST_FOREACH(sessions_by_user, i, u->sessions)
160 if (session_is_active(i))
163 (unsigned long) i->user->uid,
164 i->sessions_by_user_next ? ' ' : '\n');
166 fputs("ACTIVE_SEATS=", f);
167 LIST_FOREACH(sessions_by_user, i, u->sessions) {
168 if (session_is_active(i) && i->seat)
172 i->sessions_by_user_next ? ' ' : '\n');
178 if (ferror(f) || rename(temp_path, u->state_file) < 0) {
180 unlink(u->state_file);
189 log_error("Failed to save user data for %s: %s", u->name, strerror(-r));
194 int user_load(User *u) {
196 char *display = NULL;
201 r = parse_env_file(u->state_file, NEWLINE,
202 "CGROUP", &u->cgroup_path,
203 "RUNTIME", &u->runtime_path,
204 "SERVICE", &u->service,
213 log_error("Failed to read %s: %s", u->state_file, strerror(-r));
218 s = hashmap_get(u->manager->sessions, display);
222 if (s && s->display && display_is_local(s->display))
228 static int user_mkdir_runtime_path(User *u) {
234 r = safe_mkdir("/run/user", 0755, 0, 0);
236 log_error("Failed to create /run/user: %s", strerror(-r));
240 if (!u->runtime_path) {
241 p = strappend("/run/user/", u->name);
244 log_error("Out of memory");
250 r = safe_mkdir(p, 0700, u->uid, u->gid);
252 log_error("Failed to create runtime directory %s: %s", p, strerror(-r));
254 u->runtime_path = NULL;
262 static int user_create_cgroup(User *u) {
269 if (!u->cgroup_path) {
270 if (asprintf(&p, "%s/%s", u->manager->cgroup_path, u->name) < 0) {
271 log_error("Out of memory");
277 r = cg_create(SYSTEMD_CGROUP_CONTROLLER, p);
279 log_error("Failed to create cgroup "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
281 u->cgroup_path = NULL;
287 STRV_FOREACH(k, u->manager->controllers) {
289 if (strv_contains(u->manager->reset_controllers, *k))
292 r = cg_create(*k, p);
294 log_warning("Failed to create cgroup %s:%s: %s", *k, p, strerror(-r));
300 static int user_start_service(User *u) {
303 /* FIXME: Fill me in later ... */
308 int user_start(User *u) {
316 log_debug("New user %s logged in.", u->name);
318 /* Make XDG_RUNTIME_DIR */
319 r = user_mkdir_runtime_path(u);
324 r = user_create_cgroup(u);
328 /* Spawn user systemd */
329 r = user_start_service(u);
333 dual_timestamp_get(&u->timestamp);
337 /* Save new user data */
340 user_send_signal(u, true);
345 static int user_stop_service(User *u) {
354 static int user_shall_kill(User *u) {
357 if (!u->manager->kill_user_processes)
360 if (strv_contains(u->manager->kill_exclude_users, u->name))
363 if (strv_isempty(u->manager->kill_only_users))
366 return strv_contains(u->manager->kill_only_users, u->name);
369 static int user_terminate_cgroup(User *u) {
378 cg_trim(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
380 if (user_shall_kill(u)) {
382 r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
384 log_error("Failed to kill user cgroup: %s", strerror(-r));
387 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
389 log_error("Failed to check user cgroup: %s", strerror(-r));
391 r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
393 log_error("Failed to delete user cgroup: %s", strerror(-r));
398 STRV_FOREACH(k, u->manager->controllers)
399 cg_trim(*k, u->cgroup_path, true);
401 free(u->cgroup_path);
402 u->cgroup_path = NULL;
407 static int user_remove_runtime_path(User *u) {
412 if (!u->runtime_path)
415 r = rm_rf(u->runtime_path, false, true, false);
417 log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
419 free(u->runtime_path);
420 u->runtime_path = NULL;
425 int user_stop(User *u) {
431 log_debug("User %s logged out.", u->name);
433 LIST_FOREACH(sessions_by_user, s, u->sessions) {
440 k = user_stop_service(u);
445 k = user_terminate_cgroup(u);
449 /* Kill XDG_RUNTIME_DIR */
450 k = user_remove_runtime_path(u);
454 unlink(u->state_file);
455 user_add_to_gc_queue(u);
458 user_send_signal(u, false);
465 int user_get_idle_hint(User *u, dual_timestamp *t) {
467 bool idle_hint = true;
468 dual_timestamp ts = { 0, 0 };
472 LIST_FOREACH(sessions_by_user, s, u->sessions) {
476 ih = session_get_idle_hint(s, &k);
482 if (k.monotonic < ts.monotonic)
488 } else if (idle_hint) {
490 if (k.monotonic > ts.monotonic)
501 int user_check_gc(User *u, bool drop_not_started) {
507 if (drop_not_started && !u->started)
513 if (asprintf(&p, "/var/lib/systemd/linger/%s", u->name) < 0)
516 r = access(p, F_OK) >= 0;
522 if (u->cgroup_path) {
523 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
534 void user_add_to_gc_queue(User *u) {
540 LIST_PREPEND(User, gc_queue, u->manager->user_gc_queue, u);
541 u->in_gc_queue = true;
544 UserState user_get_state(User *u) {
550 return USER_LINGERING;
552 LIST_FOREACH(sessions_by_user, i, u->sessions)
553 if (session_is_active(i))
559 int user_kill(User *u, int signo) {
568 pid_set = set_new(trivial_hash_func, trivial_compare_func);
572 q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
574 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
583 static const char* const user_state_table[_USER_STATE_MAX] = {
584 [USER_OFFLINE] = "offline",
585 [USER_LINGERING] = "lingering",
586 [USER_ONLINE] = "online",
587 [USER_ACTIVE] = "active"
590 DEFINE_STRING_TABLE_LOOKUP(user_state, UserState);