+++ /dev/null
-/*-*- 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 General Public License as published by
- the Free Software Foundation; either version 2 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include "logind-user.h"
-#include "util.h"
-#include "cgroup-util.h"
-#include "hashmap.h"
-#include "strv.h"
-
-User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
- User *u;
-
- assert(m);
- assert(name);
-
- u = new0(User, 1);
- if (!u)
- return NULL;
-
- u->name = strdup(name);
- if (!u->name) {
- free(u);
- return NULL;
- }
-
- if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0) {
- free(u->name);
- free(u);
- return NULL;
- }
-
- if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0) {
- free(u->state_file);
- free(u->name);
- free(u);
- return NULL;
- }
-
- u->manager = m;
- u->uid = uid;
- u->gid = gid;
-
- return u;
-}
-
-void user_free(User *u) {
- assert(u);
-
- if (u->in_gc_queue)
- LIST_REMOVE(User, gc_queue, u->manager->user_gc_queue, u);
-
- while (u->sessions)
- session_free(u->sessions);
-
- free(u->cgroup_path);
-
- free(u->service);
- free(u->runtime_path);
-
- hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
-
- free(u->name);
- free(u->state_file);
- free(u);
-}
-
-int user_save(User *u) {
- FILE *f;
- int r;
- char *temp_path;
-
- assert(u);
- assert(u->state_file);
-
- if (!u->started)
- return 0;
-
- r = safe_mkdir("/run/systemd/users", 0755, 0, 0);
- if (r < 0)
- goto finish;
-
- r = fopen_temporary(u->state_file, &f, &temp_path);
- if (r < 0)
- goto finish;
-
- fchmod(fileno(f), 0644);
-
- fprintf(f,
- "# This is private data. Do not parse.\n"
- "NAME=%s\n"
- "STATE=%s\n",
- u->name,
- user_state_to_string(user_get_state(u)));
-
- if (u->cgroup_path)
- fprintf(f,
- "CGROUP=%s\n",
- u->cgroup_path);
-
- if (u->runtime_path)
- fprintf(f,
- "RUNTIME=%s\n",
- u->runtime_path);
-
- if (u->service)
- fprintf(f,
- "SERVICE=%s\n",
- u->service);
-
- if (u->display)
- fprintf(f,
- "DISPLAY=%s\n",
- u->display->id);
-
- if (u->sessions) {
- Session *i;
-
- fputs("SESSIONS=", f);
- LIST_FOREACH(sessions_by_user, i, u->sessions) {
- fprintf(f,
- "%s%c",
- i->id,
- i->sessions_by_user_next ? ' ' : '\n');
- }
-
- fputs("SEATS=", f);
- LIST_FOREACH(sessions_by_user, i, u->sessions) {
- if (i->seat)
- fprintf(f,
- "%s%c",
- i->seat->id,
- i->sessions_by_user_next ? ' ' : '\n');
- }
-
- fputs("ACTIVE_SESSIONS=", f);
- LIST_FOREACH(sessions_by_user, i, u->sessions)
- if (session_is_active(i))
- fprintf(f,
- "%lu%c",
- (unsigned long) i->user->uid,
- i->sessions_by_user_next ? ' ' : '\n');
-
- fputs("ACTIVE_SEATS=", f);
- LIST_FOREACH(sessions_by_user, i, u->sessions) {
- if (session_is_active(i) && i->seat)
- fprintf(f,
- "%s%c",
- i->seat->id,
- i->sessions_by_user_next ? ' ' : '\n');
- }
- }
-
- fflush(f);
-
- if (ferror(f) || rename(temp_path, u->state_file) < 0) {
- r = -errno;
- unlink(u->state_file);
- unlink(temp_path);
- }
-
- fclose(f);
- free(temp_path);
-
-finish:
- if (r < 0)
- log_error("Failed to save user data for %s: %s", u->name, strerror(-r));
-
- return r;
-}
-
-int user_load(User *u) {
- int r;
- char *display = NULL;
- Session *s = NULL;
-
- assert(u);
-
- r = parse_env_file(u->state_file, NEWLINE,
- "CGROUP", &u->cgroup_path,
- "RUNTIME", &u->runtime_path,
- "SERVICE", &u->service,
- "DISPLAY", &display,
- NULL);
- if (r < 0) {
- free(display);
-
- if (r == -ENOENT)
- return 0;
-
- log_error("Failed to read %s: %s", u->state_file, strerror(-r));
- return r;
- }
-
- if (display) {
- s = hashmap_get(u->manager->sessions, display);
- free(display);
- }
-
- if (s && s->display && display_is_local(s->display))
- u->display = s;
-
- return r;
-}
-
-static int user_mkdir_runtime_path(User *u) {
- char *p;
- int r;
-
- assert(u);
-
- r = safe_mkdir("/run/user", 0755, 0, 0);
- if (r < 0) {
- log_error("Failed to create /run/user: %s", strerror(-r));
- return r;
- }
-
- if (!u->runtime_path) {
- p = strappend("/run/user/", u->name);
-
- if (!p) {
- log_error("Out of memory");
- return -ENOMEM;
- }
- } else
- p = u->runtime_path;
-
- r = safe_mkdir(p, 0700, u->uid, u->gid);
- if (r < 0) {
- log_error("Failed to create runtime directory %s: %s", p, strerror(-r));
- free(p);
- u->runtime_path = NULL;
- return r;
- }
-
- u->runtime_path = p;
- return 0;
-}
-
-static int user_create_cgroup(User *u) {
- char **k;
- char *p;
- int r;
-
- assert(u);
-
- if (!u->cgroup_path) {
- if (asprintf(&p, "%s/%s", u->manager->cgroup_path, u->name) < 0) {
- log_error("Out of memory");
- return -ENOMEM;
- }
- } else
- p = u->cgroup_path;
-
- r = cg_create(SYSTEMD_CGROUP_CONTROLLER, p);
- if (r < 0) {
- log_error("Failed to create cgroup "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
- free(p);
- u->cgroup_path = NULL;
- return r;
- }
-
- u->cgroup_path = p;
-
- STRV_FOREACH(k, u->manager->controllers) {
-
- if (strv_contains(u->manager->reset_controllers, *k))
- continue;
-
- r = cg_create(*k, p);
- if (r < 0)
- log_warning("Failed to create cgroup %s:%s: %s", *k, p, strerror(-r));
- }
-
- return 0;
-}
-
-static int user_start_service(User *u) {
- assert(u);
-
- return 0;
-}
-
-int user_start(User *u) {
- int r;
-
- assert(u);
-
- if (u->started)
- return 0;
-
- log_info("New user %s logged in.", u->name);
-
- /* Make XDG_RUNTIME_DIR */
- r = user_mkdir_runtime_path(u);
- if (r < 0)
- return r;
-
- /* Create cgroup */
- r = user_create_cgroup(u);
- if (r < 0)
- return r;
-
- /* Spawn user systemd */
- r = user_start_service(u);
- if (r < 0)
- return r;
-
- dual_timestamp_get(&u->timestamp);
-
- u->started = true;
-
- /* Save new user data */
- user_save(u);
-
- user_send_signal(u, true);
-
- return 0;
-}
-
-static int user_stop_service(User *u) {
- assert(u);
-
- if (!u->service)
- return 0;
-
- return 0;
-}
-
-static int user_shall_kill(User *u) {
- assert(u);
-
- if (!u->manager->kill_user_processes)
- return false;
-
- if (strv_contains(u->manager->kill_exclude_users, u->name))
- return false;
-
- if (strv_isempty(u->manager->kill_only_users))
- return true;
-
- return strv_contains(u->manager->kill_only_users, u->name);
-}
-
-static int user_terminate_cgroup(User *u) {
- int r;
- char **k;
-
- assert(u);
-
- if (!u->cgroup_path)
- return 0;
-
- cg_trim(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
-
- if (user_shall_kill(u)) {
-
- r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
- if (r < 0)
- log_error("Failed to kill user cgroup: %s", strerror(-r));
- } else {
-
- r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, true);
- if (r < 0)
- log_error("Failed to check user cgroup: %s", strerror(-r));
- else if (r > 0) {
- r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
- if (r < 0)
- log_error("Failed to delete user cgroup: %s", strerror(-r));
- } else
- r = -EBUSY;
- }
-
- STRV_FOREACH(k, u->manager->controllers)
- cg_trim(*k, u->cgroup_path, true);
-
- free(u->cgroup_path);
- u->cgroup_path = NULL;
-
- return r;
-}
-
-static int user_remove_runtime_path(User *u) {
- int r;
-
- assert(u);
-
- if (!u->runtime_path)
- return 0;
-
- r = rm_rf(u->runtime_path, false, true, false);
- if (r < 0)
- log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
-
- free(u->runtime_path);
- u->runtime_path = NULL;
-
- return r;
-}
-
-int user_stop(User *u) {
- Session *s;
- int r = 0, k;
- assert(u);
-
- if (u->started)
- log_info("User %s logged out.", u->name);
-
- LIST_FOREACH(sessions_by_user, s, u->sessions) {
- k = session_stop(s);
- if (k < 0)
- r = k;
- }
-
- /* Kill systemd */
- k = user_stop_service(u);
- if (k < 0)
- r = k;
-
- /* Kill cgroup */
- k = user_terminate_cgroup(u);
- if (k < 0)
- r = k;
-
- /* Kill XDG_RUNTIME_DIR */
- k = user_remove_runtime_path(u);
- if (k < 0)
- r = k;
-
- unlink(u->state_file);
- user_add_to_gc_queue(u);
-
- if (u->started)
- user_send_signal(u, false);
-
- u->started = false;
-
- return r;
-}
-
-int user_get_idle_hint(User *u, dual_timestamp *t) {
- Session *s;
- bool idle_hint = true;
- dual_timestamp ts = { 0, 0 };
-
- assert(u);
-
- LIST_FOREACH(sessions_by_user, s, u->sessions) {
- 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 user_check_gc(User *u, bool drop_not_started) {
- int r;
- char *p;
-
- assert(u);
-
- if (drop_not_started && !u->started)
- return 0;
-
- if (u->sessions)
- return 1;
-
- if (asprintf(&p, "/var/lib/systemd/linger/%s", u->name) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK) >= 0;
- free(p);
-
- if (r > 0)
- return 1;
-
- if (u->cgroup_path) {
- r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, false);
- if (r < 0)
- return r;
-
- if (r <= 0)
- return 1;
- }
-
- return 0;
-}
-
-void user_add_to_gc_queue(User *u) {
- assert(u);
-
- if (u->in_gc_queue)
- return;
-
- LIST_PREPEND(User, gc_queue, u->manager->user_gc_queue, u);
- u->in_gc_queue = true;
-}
-
-UserState user_get_state(User *u) {
- Session *i;
-
- assert(u);
-
- if (!u->sessions)
- return USER_LINGERING;
-
- LIST_FOREACH(sessions_by_user, i, u->sessions)
- if (session_is_active(i))
- return USER_ACTIVE;
-
- return USER_ONLINE;
-}
-
-int user_kill(User *u, int signo) {
- int r = 0, q;
- Set *pid_set = NULL;
-
- assert(u);
-
- if (!u->cgroup_path)
- return -ESRCH;
-
- pid_set = set_new(trivial_hash_func, trivial_compare_func);
- if (!pid_set)
- return -ENOMEM;
-
- q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
- if (q < 0)
- if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
- r = q;
-
- if (pid_set)
- set_free(pid_set);
-
- return r;
-}
-
-static const char* const user_state_table[_USER_STATE_MAX] = {
- [USER_OFFLINE] = "offline",
- [USER_LINGERING] = "lingering",
- [USER_ONLINE] = "online",
- [USER_ACTIVE] = "active"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(user_state, UserState);
~ianmdlvl / elogind.git / blobdiff