src/login/logind-session.c

	logind-session.c revision 6a38d04a036475bfc222f40961e2adcaa70a6174
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer/***
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  This file is part of systemd.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  Copyright 2011 Lennart Poettering
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  systemd is free software; you can redistribute it and/or modify it
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  under the terms of the GNU Lesser General Public License as published by
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  the Free Software Foundation; either version 2.1 of the License, or
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  (at your option) any later version.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  systemd is distributed in the hope that it will be useful, but
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  WITHOUT ANY WARRANTY; without even the implied warranty of
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  Lesser General Public License for more details.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  You should have received a copy of the GNU Lesser General Public License
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer  along with systemd; If not, see <http://www.gnu.org/licenses/>.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer***/
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <errno.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <fcntl.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <linux/vt.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <linux/kd.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <signal.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <string.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <sys/ioctl.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include <unistd.h>
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "sd-id128.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "sd-messages.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "strv.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "util.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "mkdir.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "path-util.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "fileio.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "audit.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "bus-util.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "bus-error.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer#include "logind-session.h"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerstatic unsigned long devt_hash_func(const void *p, const uint8_t hash_key[HASH_KEY_SIZE]) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        uint64_t u = *(const dev_t*)p;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return uint64_hash_func(&u, hash_key);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerstatic int devt_compare_func(const void *_a, const void *_b) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        dev_t a, b;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        a = *(const dev_t*) _a;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        b = *(const dev_t*) _b;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return a < b ? -1 : (a > b ? 1 : 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald HoyerSession* session_new(Manager *m, const char *id) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        Session *s;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(m);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(session_id_valid(id));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s = new0(Session, 1);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->state_file = strappend("/run/systemd/sessions/", id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->state_file) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->devices = hashmap_new(devt_hash_func, devt_compare_func);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->devices) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->id = basename(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (hashmap_put(m->sessions, s->id, s) < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                hashmap_free(s->devices);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->manager = m;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->fifo_fd = -1;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->vtfd = -1;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return s;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyervoid session_free(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        SessionDevice *sd;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->in_gc_queue)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        session_remove_fifo(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        session_drop_controller(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        while ((sd = hashmap_first(s->devices)))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_device_free(sd);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        hashmap_free(s->devices);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->user) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                LIST_REMOVE(sessions_by_user, s->user->sessions, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (s->user->display == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->user->display = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (s->seat->active == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->seat->active = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (s->seat->pending_switch == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->seat->pending_switch = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                LIST_REMOVE(sessions_by_seat, s->seat->sessions, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->scope) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                hashmap_remove(s->manager->session_units, s->scope);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                free(s->scope);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->scope_job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        sd_bus_message_unref(s->create_message);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->tty);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->display);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->remote_host);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->remote_user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->service);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        hashmap_remove(s->manager->sessions, s->id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyervoid session_set_user(Session *s, User *u) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(!s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->user = u;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        LIST_PREPEND(sessions_by_user, u->sessions, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint session_save(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_free_ char *temp_path = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_fclose_ FILE *f = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r = 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->user)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -ESTALE;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->started)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                goto finish;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = fopen_temporary(s->state_file, &f, &temp_path);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                goto finish;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        fchmod(fileno(f), 0644);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        fprintf(f,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "# This is private data. Do not parse.\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "UID=%lu\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "USER=%s\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "ACTIVE=%i\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "STATE=%s\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                "REMOTE=%i\n",
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                (unsigned long) s->user->uid,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                s->user->name,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_is_active(s),
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_state_to_string(session_get_state(s)),
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                s->remote);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->type >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "TYPE=%s\n", session_type_to_string(s->type));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->class >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "CLASS=%s\n", session_class_to_string(s->class));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->scope)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "SCOPE=%s\n", s->scope);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->scope_job)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "SCOPE_JOB=%s\n", s->scope_job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->fifo_path)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "FIFO=%s\n", s->fifo_path);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "SEAT=%s\n", s->seat->id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->tty)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "TTY=%s\n", s->tty);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->display)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "DISPLAY=%s\n", s->display);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->remote_host)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "REMOTE_HOST=%s\n", s->remote_host);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->remote_user)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "REMOTE_USER=%s\n", s->remote_user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->service)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "SERVICE=%s\n", s->service);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat && seat_has_vts(s->seat))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "VTNR=%u\n", s->vtnr);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->leader > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "LEADER=%lu\n", (unsigned long) s->leader);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->audit_id > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (dual_timestamp_is_set(&s->timestamp))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        "REALTIME=%llu\n"
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        "MONOTONIC=%llu\n",
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        (unsigned long long) s->timestamp.realtime,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        (unsigned long long) s->timestamp.monotonic);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->controller)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fprintf(f, "CONTROLLER=%s\n", s->controller);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        fflush(f);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (ferror(f) || rename(temp_path, s->state_file) < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                r = -errno;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unlink(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unlink(temp_path);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerfinish:
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                log_error("Failed to save session data for %s: %s", s->id, strerror(-r));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint session_load(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_free_ char *remote = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *seat = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *vtnr = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *leader = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *type = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *class = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *uid = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *realtime = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *monotonic = NULL,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                *controller = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int k, r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = parse_env_file(s->state_file, NEWLINE,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "REMOTE",         &remote,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "SCOPE",          &s->scope,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "SCOPE_JOB",      &s->scope_job,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "FIFO",           &s->fifo_path,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "SEAT",           &seat,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "TTY",            &s->tty,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "DISPLAY",        &s->display,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "REMOTE_HOST",    &s->remote_host,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "REMOTE_USER",    &s->remote_user,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "SERVICE",        &s->service,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "VTNR",           &vtnr,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "LEADER",         &leader,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "TYPE",           &type,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "CLASS",          &class,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "UID",            &uid,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "REALTIME",       &realtime,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "MONOTONIC",      &monotonic,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "CONTROLLER",     &controller,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                log_error("Failed to read %s: %s", s->state_file, strerror(-r));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->user) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                uid_t u;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                User *user;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!uid) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        log_error("UID not specified for session %s", s->id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -ENOENT;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                r = parse_uid(uid, &u);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (r < 0)  {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        log_error("Failed to parse UID value %s for session %s.", uid, s->id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                user = hashmap_get(s->manager->users, ULONG_TO_PTR((unsigned long) u));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!user) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        log_error("User of session %s not known.", s->id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -ENOENT;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_set_user(s, user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (remote) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                k = parse_boolean(remote);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (k >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->remote = k;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (vtnr)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                safe_atou(vtnr, &s->vtnr);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (seat && !s->seat) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                Seat *o;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                o = hashmap_get(s->manager->seats, seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (o)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        r = seat_attach_session(o, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!o || r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        log_error("Cannot attach session %s to seat %s", s->id, seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->seat || !seat_has_vts(s->seat))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                s->vtnr = 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (leader) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                k = parse_pid(leader, &s->leader);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (k >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        audit_session_from_pid(s->leader, &s->audit_id);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (type) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                SessionType t;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                t = session_type_from_string(type);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (t >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->type = t;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (class) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                SessionClass c;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                c = session_class_from_string(class);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (c >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->class = c;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->fifo_path) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                int fd;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                /* If we open an unopened pipe for reading we will not
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   get an EOF. to trigger an EOF we hence open it for
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   reading, but close it right-away which then will
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   trigger the EOF. */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                fd = session_create_fifo(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (fd >= 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        close_nointr_nofail(fd);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (realtime) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unsigned long long l;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (sscanf(realtime, "%llu", &l) > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->timestamp.realtime = l;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (monotonic) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                unsigned long long l;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (sscanf(monotonic, "%llu", &l) > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->timestamp.monotonic = l;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (controller) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        session_set_controller(s, controller, false);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                else
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        session_restore_vt(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint session_activate(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        unsigned int num_pending;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->seat)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -ENOTSUP;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat->active == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* on seats with VTs, we let VTs manage session-switching */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (seat_has_vts(s->seat)) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!s->vtnr)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -ENOTSUP;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return chvt(s->vtnr);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* On seats without VTs, we implement session-switching in logind. We
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer         * try to pause all session-devices and wait until the session
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer         * controller acknowledged them. Once all devices are asleep, we simply
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer         * switch the active session and be done.
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer         * We save the session we want to switch to in seat->pending_switch and
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer         * seat_complete_switch() will perform the final switch. */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->seat->pending_switch = s;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* if no devices are running, immediately perform the session switch */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        num_pending = session_device_try_pause_all(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!num_pending)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                seat_complete_switch(s->seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerstatic int session_start_scope(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s->user->slice);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->scope) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                _cleanup_free_ char *description = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                const char *kill_mode;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                char *scope, *job;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                description = strjoin("Session ", s->id, " of user ", s->user->name, NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!description)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return log_oom();
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                scope = strjoin("session-", s->id, ".scope", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!scope)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return log_oom();
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                kill_mode = manager_shall_kill(s->manager, s->user->name) ? "control-group" : "none";
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-user-sessions.service", kill_mode, &error, &job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (r < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        log_error("Failed to start session scope %s: %s %s",
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                                  scope, bus_error_message(&error, r), error.name);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        free(scope);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                } else {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->scope = scope;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        free(s->scope_job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        s->scope_job = job;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->scope)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                hashmap_put(s->manager->session_units, s->scope, s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint session_start(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->user)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -ESTALE;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->started)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = user_start(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* Create cgroup */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = session_start_scope(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        log_struct(s->type == SESSION_TTY || s->type == SESSION_X11 ? LOG_INFO : LOG_DEBUG,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   MESSAGE_ID(SD_MESSAGE_SESSION_START),
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   "SESSION_ID=%s", s->id,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   "USER_ID=%s", s->user->name,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   "LEADER=%lu", (unsigned long) s->leader,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   "MESSAGE=New session %s of user %s.", s->id, s->user->name,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                   NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!dual_timestamp_is_set(&s->timestamp))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                dual_timestamp_get(&s->timestamp);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                seat_read_active_vt(s->seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->started = true;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* Save session data */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        session_save(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        user_save(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        session_send_signal(s, true);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                seat_save(s->seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (s->seat->active == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                else
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        seat_send_changed(s->seat, "Sessions", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        user_send_changed(s->user, "Sessions", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerstatic int session_stop_scope(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        char *job;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->scope)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = manager_stop_unit(s->manager, s->scope, &error, &job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (r < 0) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                log_error("Failed to stop session scope: %s", bus_error_message(&error, r));
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        free(s->scope_job);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        s->scope_job = job;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return 0;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerint session_stop(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        int r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->user)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return -ESTALE;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* Kill cgroup */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        r = session_stop_scope(s);
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        session_save(s);
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        user_save(s->user);
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        return r;
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer}
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyerint session_finalize(Session *s) {
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        int r = 0;
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        SessionDevice *sd;
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        assert(s);
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer        if (!s->user)
33a5e20ffaa2cbb2853f14265566bac66a7f9026Harald Hoyer                return -ESTALE;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->started)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                log_struct(s->type == SESSION_TTY || s->type == SESSION_X11 ? LOG_INFO : LOG_DEBUG,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           MESSAGE_ID(SD_MESSAGE_SESSION_STOP),
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "SESSION_ID=%s", s->id,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "USER_ID=%s", s->user->name,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "LEADER=%lu", (unsigned long) s->leader,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           "MESSAGE=Removed session %s.", s->id,
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                           NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        /* Kill session devices */
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        while ((sd = hashmap_first(s->devices)))
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_device_free(sd);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        unlink(s->state_file);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        session_add_to_gc_queue(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        user_add_to_gc_queue(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->started) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                session_send_signal(s, false);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                s->started = false;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (s->seat) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (s->seat->active == s)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        seat_set_active(s->seat, NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                seat_send_changed(s->seat, "Sessions", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                seat_save(s->seat);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        }
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        user_send_changed(s->user, "Sessions", NULL);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        user_save(s->user);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return r;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerbool session_is_active(Session *s) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(s);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!s->seat)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                return true;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        return s->seat->active == s;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer}
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyerstatic int get_tty_atime(const char *tty, usec_t *atime) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        _cleanup_free_ char *p = NULL;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        struct stat st;
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(tty);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        assert(atime);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer        if (!path_is_absolute(tty)) {
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                p = strappend("/dev/", tty);
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                if (!p)
898720b7e9cf3bdf7a93e435cbed5dd6942ecf9bHarald Hoyer                        return -ENOMEM;

                tty = p;
        } else if (!path_startswith(tty, "/dev/"))
                return -ENOENT;

        if (lstat(tty, &st) < 0)
                return -errno;

        *atime = timespec_load(&st.st_atim);
        return 0;
}

static int get_process_ctty_atime(pid_t pid, usec_t *atime) {
        _cleanup_free_ char *p = NULL;
        int r;

        assert(pid > 0);
        assert(atime);

        r = get_ctty(pid, NULL, &p);
        if (r < 0)
                return r;

        return get_tty_atime(p, atime);
}

int session_get_idle_hint(Session *s, dual_timestamp *t) {
        usec_t atime = 0, n;
        int r;

        assert(s);

        /* Explicit idle hint is set */
        if (s->idle_hint) {
                if (t)
                        *t = s->idle_hint_timestamp;

                return s->idle_hint;
        }

        /* Graphical sessions should really implement a real
         * idle hint logic */
        if (s->display)
                goto dont_know;

        /* For sessions with an explicitly configured tty, let's check
         * its atime */
        if (s->tty) {
                r = get_tty_atime(s->tty, &atime);
                if (r >= 0)
                        goto found_atime;
        }

        /* For sessions with a leader but no explicitly configured
         * tty, let's check the controlling tty of the leader */
        if (s->leader > 0) {
                r = get_process_ctty_atime(s->leader, &atime);
                if (r >= 0)
                        goto found_atime;
        }

dont_know:
        if (t)
                *t = s->idle_hint_timestamp;

        return 0;

found_atime:
        if (t)
                dual_timestamp_from_realtime(t, atime);

        n = now(CLOCK_REALTIME);

        if (s->manager->idle_action_usec <= 0)
                return 0;

        return atime + s->manager->idle_action_usec <= n;
}

void session_set_idle_hint(Session *s, bool b) {
        assert(s);

        if (s->idle_hint == b)
                return;

        s->idle_hint = b;
        dual_timestamp_get(&s->idle_hint_timestamp);

        session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL);

        if (s->seat)
                seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL);

        user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL);
        manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL);
}

static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
        Session *s = userdata;

        assert(s);
        assert(s->fifo_fd == fd);

        /* EOF on the FIFO means the session died abnormally. */

        session_remove_fifo(s);
        session_stop(s);

        return 1;
}

int session_create_fifo(Session *s) {
        int r;

        assert(s);

        /* Create FIFO */
        if (!s->fifo_path) {
                r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0);
                if (r < 0)
                        return r;

                if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0)
                        return -ENOMEM;

                if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST)
                        return -errno;
        }

        /* Open reading side */
        if (s->fifo_fd < 0) {
                s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
                if (s->fifo_fd < 0)
                        return -errno;

        }

        if (!s->fifo_event_source) {
                r = sd_event_add_io(s->manager->event, s->fifo_fd, 0, session_dispatch_fifo, s, &s->fifo_event_source);
                if (r < 0)
                        return r;

                r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE);
                if (r < 0)
                        return r;
        }

        /* Open writing side */
        r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
        if (r < 0)
                return -errno;

        return r;
}

void session_remove_fifo(Session *s) {
        assert(s);

        if (s->fifo_event_source)
                s->fifo_event_source = sd_event_source_unref(s->fifo_event_source);

        if (s->fifo_fd >= 0) {
                close_nointr_nofail(s->fifo_fd);
                s->fifo_fd = -1;
        }

        if (s->fifo_path) {
                unlink(s->fifo_path);
                free(s->fifo_path);
                s->fifo_path = NULL;
        }
}

bool session_check_gc(Session *s, bool drop_not_started) {
        int r;

        assert(s);

        if (drop_not_started && !s->started)
                return false;

        if (!s->user)
                return false;

        if (s->fifo_fd >= 0) {
                r = pipe_eof(s->fifo_fd);
                if (r < 0)
                        return true;

                if (r == 0)
                        return true;
        }

        if (s->scope_job && manager_job_is_active(s->manager, s->scope_job))
                return true;

        if (s->scope && manager_unit_is_active(s->manager, s->scope))
                return true;

        return false;
}

void session_add_to_gc_queue(Session *s) {
        assert(s);

        if (s->in_gc_queue)
                return;

        LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s);
        s->in_gc_queue = true;
}

SessionState session_get_state(Session *s) {
        assert(s);

        if (s->scope_job)
                return SESSION_OPENING;

        if (s->fifo_fd < 0)
                return SESSION_CLOSING;

        if (session_is_active(s))
                return SESSION_ACTIVE;

        return SESSION_ONLINE;
}

int session_kill(Session *s, KillWho who, int signo) {
        assert(s);

        if (!s->scope)
                return -ESRCH;

        return manager_kill_unit(s->manager, s->scope, who, signo, NULL);
}

static int session_open_vt(Session *s) {
        char path[128];

        if (!s->vtnr)
                return -1;

        if (s->vtfd >= 0)
                return s->vtfd;

        sprintf(path, "/dev/tty%u", s->vtnr);
        s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
        if (s->vtfd < 0) {
                log_error("cannot open VT %s of session %s: %m", path, s->id);
                return -1;
        }

        return s->vtfd;
}

static int session_vt_fn(sd_event_source *source, const struct signalfd_siginfo *si, void *data) {
        Session *s = data;

        if (s->vtfd >= 0)
                ioctl(s->vtfd, VT_RELDISP, 1);

        return 0;
}

void session_mute_vt(Session *s) {
        int vt, r;
        struct vt_mode mode = { 0 };
        sigset_t mask;

        vt = session_open_vt(s);
        if (vt < 0)
                return;

        r = ioctl(vt, KDSKBMODE, K_OFF);
        if (r < 0)
                goto error;

        r = ioctl(vt, KDSETMODE, KD_GRAPHICS);
        if (r < 0)
                goto error;

        sigemptyset(&mask);
        sigaddset(&mask, SIGUSR1);
        sigprocmask(SIG_BLOCK, &mask, NULL);

        r = sd_event_add_signal(s->manager->event, SIGUSR1, session_vt_fn, s, &s->vt_source);
        if (r < 0)
                goto error;

        /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS.
         * So we need a dummy handler here which just acknowledges *all* VT
         * switch requests. */
        mode.mode = VT_PROCESS;
        mode.relsig = SIGUSR1;
        mode.acqsig = SIGUSR1;
        r = ioctl(vt, VT_SETMODE, &mode);
        if (r < 0)
                goto error;

        return;

error:
        log_error("cannot mute VT %u for session %s (%d/%d)", s->vtnr, s->id, r, errno);
        session_restore_vt(s);
}

void session_restore_vt(Session *s) {
        _cleanup_free_ char *utf8;
        int vt, kb = K_XLATE;
        struct vt_mode mode = { 0 };

        vt = session_open_vt(s);
        if (vt < 0)
                return;

        sd_event_source_unref(s->vt_source);
        s->vt_source = NULL;

        ioctl(vt, KDSETMODE, KD_TEXT);

        if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1')
                kb = K_UNICODE;
        ioctl(vt, KDSKBMODE, kb);

        mode.mode = VT_AUTO;
        ioctl(vt, VT_SETMODE, &mode);

        close_nointr_nofail(vt);
        s->vtfd = -1;
}

bool session_is_controller(Session *s, const char *sender) {
        assert(s);

        return streq_ptr(s->controller, sender);
}

static void session_swap_controller(Session *s, char *name) {
        SessionDevice *sd;

        if (s->controller) {
                manager_drop_busname(s->manager, s->controller);
                free(s->controller);
                s->controller = NULL;

                /* Drop all devices as they're now unused. Do that after the
                 * controller is released to avoid sending out useles
                 * dbus signals. */
                while ((sd = hashmap_first(s->devices)))
                        session_device_free(sd);

                if (!name)
                        session_restore_vt(s);
        }

        s->controller = name;
        session_save(s);
}

int session_set_controller(Session *s, const char *sender, bool force) {
        char *t;
        int r;

        assert(s);
        assert(sender);

        if (session_is_controller(s, sender))
                return 0;
        if (s->controller && !force)
                return -EBUSY;

        t = strdup(sender);
        if (!t)
                return -ENOMEM;

        r = manager_watch_busname(s->manager, sender);
        if (r) {
                free(t);
                return r;
        }

        session_swap_controller(s, t);

        /* When setting a session controller, we forcibly mute the VT and set
         * it into graphics-mode. Applications can override that by changing
         * VT state after calling TakeControl(). However, this serves as a good
         * default and well-behaving controllers can now ignore VTs entirely.
         * Note that we reset the VT on ReleaseControl() and if the controller
         * exits.
         * If logind crashes/restarts, we restore the controller during restart
         * or reset the VT in case it crashed/exited, too. */
        session_mute_vt(s);

        return 0;
}

void session_drop_controller(Session *s) {
        assert(s);

        if (!s->controller)
                return;

        session_swap_controller(s, NULL);
}

static const char* const session_state_table[_SESSION_STATE_MAX] = {
        [SESSION_OPENING] = "opening",
        [SESSION_ONLINE] = "online",
        [SESSION_ACTIVE] = "active",
        [SESSION_CLOSING] = "closing"
};

DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState);

static const char* const session_type_table[_SESSION_TYPE_MAX] = {
        [SESSION_TTY] = "tty",
        [SESSION_X11] = "x11",
        [SESSION_UNSPECIFIED] = "unspecified"
};

DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType);

static const char* const session_class_table[_SESSION_CLASS_MAX] = {
        [SESSION_USER] = "user",
        [SESSION_GREETER] = "greeter",
        [SESSION_LOCK_SCREEN] = "lock-screen",
        [SESSION_BACKGROUND] = "background"
};

DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass);

static const char* const kill_who_table[_KILL_WHO_MAX] = {
        [KILL_LEADER] = "leader",
        [KILL_ALL] = "all"
};

DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);