#include "path-util.h"
#include "cgroup-util.h"
#include "logind-session.h"
+#include "fileio.h"
-#define IDLE_THRESHOLD_USEC (5*USEC_PER_MINUTE)
-
-Session* session_new(Manager *m, User *u, const char *id) {
+Session* session_new(Manager *m, const char *id) {
Session *s;
assert(m);
s->manager = m;
s->fifo_fd = -1;
- s->user = u;
-
- LIST_PREPEND(Session, sessions_by_user, u->sessions, s);
return s;
}
free(s->remote_host);
free(s->remote_user);
free(s->service);
+ free(s->slice);
hashmap_remove(s->manager->sessions, s->id);
session_remove_fifo(s);
free(s);
}
+void session_set_user(Session *s, User *u) {
+ assert(s);
+ assert(!s->user);
+
+ s->user = u;
+ LIST_PREPEND(Session, sessions_by_user, u->sessions, s);
+}
+
int session_save(Session *s) {
- FILE *f;
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *temp_path = NULL;
int r = 0;
- char *temp_path;
assert(s);
+ if (!s->user)
+ return -ESTALE;
+
if (!s->started)
return 0;
s->kill_processes);
if (s->type >= 0)
- fprintf(f,
- "TYPE=%s\n",
- session_type_to_string(s->type));
+ fprintf(f, "TYPE=%s\n", session_type_to_string(s->type));
if (s->class >= 0)
- fprintf(f,
- "CLASS=%s\n",
- session_class_to_string(s->class));
+ fprintf(f, "CLASS=%s\n", session_class_to_string(s->class));
if (s->cgroup_path)
- fprintf(f,
- "CGROUP=%s\n",
- s->cgroup_path);
+ fprintf(f, "CGROUP=%s\n", s->cgroup_path);
if (s->fifo_path)
- fprintf(f,
- "FIFO=%s\n",
- s->fifo_path);
+ fprintf(f, "FIFO=%s\n", s->fifo_path);
if (s->seat)
- fprintf(f,
- "SEAT=%s\n",
- s->seat->id);
+ fprintf(f, "SEAT=%s\n", s->seat->id);
if (s->tty)
- fprintf(f,
- "TTY=%s\n",
- s->tty);
+ fprintf(f, "TTY=%s\n", s->tty);
if (s->display)
- fprintf(f,
- "DISPLAY=%s\n",
- s->display);
+ fprintf(f, "DISPLAY=%s\n", s->display);
if (s->remote_host)
- fprintf(f,
- "REMOTE_HOST=%s\n",
- s->remote_host);
+ fprintf(f, "REMOTE_HOST=%s\n", s->remote_host);
if (s->remote_user)
- fprintf(f,
- "REMOTE_USER=%s\n",
- s->remote_user);
+ fprintf(f, "REMOTE_USER=%s\n", s->remote_user);
if (s->service)
- fprintf(f,
- "SERVICE=%s\n",
- s->service);
+ fprintf(f, "SERVICE=%s\n", s->service);
+
+ if (s->seat)
+ fprintf(f, "SLICE=%s\n", s->slice);
if (s->seat && seat_can_multi_session(s->seat))
- fprintf(f,
- "VTNR=%i\n",
- s->vtnr);
+ fprintf(f, "VTNR=%i\n", s->vtnr);
if (s->leader > 0)
- fprintf(f,
- "LEADER=%lu\n",
- (unsigned long) s->leader);
+ fprintf(f, "LEADER=%lu\n", (unsigned long) s->leader);
if (s->audit_id > 0)
+ fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id);
+
+ if (dual_timestamp_is_set(&s->timestamp))
fprintf(f,
- "AUDIT=%llu\n",
- (unsigned long long) s->audit_id);
+ "REALTIME=%llu\n"
+ "MONOTONIC=%llu\n",
+ (unsigned long long) s->timestamp.realtime,
+ (unsigned long long) s->timestamp.monotonic);
fflush(f);
unlink(temp_path);
}
- fclose(f);
- free(temp_path);
-
finish:
if (r < 0)
log_error("Failed to save session data for %s: %s", s->id, strerror(-r));
}
int session_load(Session *s) {
- char *remote = NULL,
+ _cleanup_free_ char *remote = NULL,
*kill_processes = NULL,
*seat = NULL,
*vtnr = NULL,
*leader = NULL,
*audit_id = NULL,
*type = NULL,
- *class = NULL;
+ *class = NULL,
+ *uid = NULL,
+ *realtime = NULL,
+ *monotonic = NULL;
int k, r;
"REMOTE_HOST", &s->remote_host,
"REMOTE_USER", &s->remote_user,
"SERVICE", &s->service,
+ "SLICE", &s->slice,
"VTNR", &vtnr,
"LEADER", &leader,
"TYPE", &type,
"CLASS", &class,
+ "UID", &uid,
+ "REALTIME", &realtime,
+ "MONOTONIC", &monotonic,
NULL);
- if (r < 0)
- goto finish;
+ if (r < 0) {
+ log_error("Failed to read %s: %s", s->state_file, strerror(-r));
+ return r;
+ }
+
+ if (!s->user) {
+ uid_t u;
+ User *user;
+
+ if (!uid) {
+ log_error("UID not specified for session %s", s->id);
+ return -ENOENT;
+ }
+
+ r = parse_uid(uid, &u);
+ if (r < 0) {
+ log_error("Failed to parse UID value %s for session %s.", uid, s->id);
+ return r;
+ }
+
+ user = hashmap_get(s->manager->users, ULONG_TO_PTR((unsigned long) u));
+ if (!user) {
+ log_error("User of session %s not known.", s->id);
+ return -ENOENT;
+ }
+
+ session_set_user(s, user);
+ }
if (remote) {
k = parse_boolean(remote);
close_nointr_nofail(fd);
}
-finish:
- free(remote);
- free(kill_processes);
- free(seat);
- free(vtnr);
- free(leader);
- free(audit_id);
- free(class);
+ if (realtime) {
+ unsigned long long l;
+ if (sscanf(realtime, "%llu", &l) > 0)
+ s->timestamp.realtime = l;
+ }
+
+ if (monotonic) {
+ unsigned long long l;
+ if (sscanf(monotonic, "%llu", &l) > 0)
+ s->timestamp.monotonic = l;
+ }
return r;
}
int r;
assert(s);
+ assert(s->user);
if (s->vtnr < 0)
return -ENOTSUP;
int r;
assert(s);
- assert(controller);
+ assert(s->user);
assert(path);
- if (s->leader > 0) {
+ if (s->leader > 0)
r = cg_create_and_attach(controller, path, s->leader);
- if (r < 0)
- r = cg_create(controller, path);
- } else
- r = cg_create(controller, path);
+ else
+ r = -EINVAL;
- if (r < 0)
- return r;
+ if (r < 0) {
+ r = cg_create(controller, path);
+ if (r < 0)
+ return r;
+ }
- r = cg_set_task_access(controller, path, 0644, s->user->uid, s->user->gid, -1);
+ r = cg_set_task_access(controller, path, 0644, s->user->uid, s->user->gid);
if (r >= 0)
r = cg_set_group_access(controller, path, 0755, s->user->uid, s->user->gid);
static int session_create_cgroup(Session *s) {
char **k;
- char *p;
int r;
assert(s);
assert(s->user->cgroup_path);
if (!s->cgroup_path) {
- if (asprintf(&p, "%s/%s", s->user->cgroup_path, s->id) < 0)
+ _cleanup_free_ char *name = NULL, *escaped = NULL;
+
+ name = strappend(s->id, ".session");
+ if (!name)
+ return log_oom();
+
+ escaped = cg_escape(name);
+ if (!escaped)
+ return log_oom();
+
+ if (s->slice) {
+ _cleanup_free_ char *slice = NULL;
+
+ r = cg_slice_to_path(s->slice, &slice);
+ if (r < 0)
+ return r;
+
+ s->cgroup_path = strjoin(s->manager->cgroup_root, "/", slice, "/", escaped, NULL);
+ } else
+ s->cgroup_path = strjoin(s->user->cgroup_path, "/", escaped, NULL);
+
+ if (!s->cgroup_path)
return log_oom();
- } else
- p = s->cgroup_path;
+ }
- r = session_create_one_group(s, SYSTEMD_CGROUP_CONTROLLER, p);
+ if (!s->slice) {
+ s->slice = strdup(s->user->slice);
+ if (!s->slice)
+ return log_oom();
+ }
+
+ r = session_create_one_group(s, SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path);
if (r < 0) {
- log_error("Failed to create "SYSTEMD_CGROUP_CONTROLLER":%s: %s", p, strerror(-r));
- free(p);
- s->cgroup_path = NULL;
+ log_error("Failed to create "SYSTEMD_CGROUP_CONTROLLER":%s: %s", s->cgroup_path, strerror(-r));
return r;
}
- s->cgroup_path = p;
-
STRV_FOREACH(k, s->controllers) {
if (strv_contains(s->reset_controllers, *k))
continue;
- r = session_create_one_group(s, *k, p);
+ r = session_create_one_group(s, *k, s->cgroup_path);
if (r < 0)
- log_warning("Failed to create %s:%s: %s", *k, p, strerror(-r));
+ log_warning("Failed to create %s:%s: %s", *k, s->cgroup_path, strerror(-r));
}
STRV_FOREACH(k, s->manager->controllers) {
strv_contains(s->controllers, *k))
continue;
- r = session_create_one_group(s, *k, p);
+ r = session_create_one_group(s, *k, s->cgroup_path);
if (r < 0)
- log_warning("Failed to create %s:%s: %s", *k, p, strerror(-r));
+ log_warning("Failed to create %s:%s: %s", *k, s->cgroup_path, strerror(-r));
}
if (s->leader > 0) {
r = cg_attach(*k, "/", s->leader);
if (r < 0)
log_warning("Failed to reset controller %s: %s", *k, strerror(-r));
-
}
}
int r;
assert(s);
- assert(s->user);
+
+ if (!s->user)
+ return -ESTALE;
if (s->started)
return 0;
/* Create X11 symlink */
session_link_x11_socket(s);
- dual_timestamp_get(&s->timestamp);
+ if (!dual_timestamp_is_set(&s->timestamp))
+ dual_timestamp_get(&s->timestamp);
if (s->seat)
seat_read_active_vt(s->seat);
assert(s);
+ if (!s->user)
+ return -ESTALE;
+
if (s->started)
log_struct(s->type == SESSION_TTY || s->type == SESSION_X11 ? LOG_INFO : LOG_DEBUG,
MESSAGE_ID(SD_MESSAGE_SESSION_STOP),
if (s->started)
session_send_signal(s, false);
+ s->started = false;
+
if (s->seat) {
if (s->seat->active == s)
seat_set_active(s->seat, NULL);
user_send_changed(s->user, "Sessions\0");
user_save(s->user);
- s->started = false;
-
return r;
}
return s->seat->active == s;
}
-int session_get_idle_hint(Session *s, dual_timestamp *t) {
- char *p;
+static int get_tty_atime(const char *tty, usec_t *atime) {
+ _cleanup_free_ char *p = NULL;
struct stat st;
- usec_t u, n;
- int k;
+
+ assert(tty);
+ assert(atime);
+
+ if (!path_is_absolute(tty)) {
+ p = strappend("/dev/", tty);
+ if (!p)
+ 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;
}
- if (isempty(s->tty))
+ /* Graphical sessions should really implement a real
+ * idle hint logic */
+ if (s->display)
goto dont_know;
- if (s->tty[0] != '/') {
- p = strappend("/dev/", s->tty);
- if (!p)
- return -ENOMEM;
- } else
- p = NULL;
+ /* 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;
+ }
- if (!startswith(p ? p : s->tty, "/dev/")) {
- free(p);
- goto dont_know;
+ /* 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;
}
- k = lstat(p ? p : s->tty, &st);
- free(p);
+ /* For other TTY sessions, let's find the most recent atime of
+ * the ttys of any of the processes of the session */
+ if (s->cgroup_path) {
+ _cleanup_fclose_ FILE *f = NULL;
- if (k < 0)
- goto dont_know;
+ if (cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, &f) >= 0) {
+ pid_t pid;
- u = timespec_load(&st.st_atim);
- n = now(CLOCK_REALTIME);
+ atime = 0;
+ while (cg_read_pid(f, &pid) > 0) {
+ usec_t a;
- if (t)
- dual_timestamp_from_realtime(t, u);
+ if (get_process_ctty_atime(pid, &a) >= 0)
+ if (atime == 0 || atime < a)
+ atime = a;
+ }
- return u + IDLE_THRESHOLD_USEC < n;
+ if (atime != 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) {
/* Open reading side */
if (s->fifo_fd < 0) {
- struct epoll_event ev;
+ struct epoll_event ev = {};
s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
if (s->fifo_fd < 0)
if (r < 0)
return r;
- zero(ev);
ev.events = 0;
ev.data.u32 = FD_OTHER_BASE + s->fifo_fd;
if (drop_not_started && !s->started)
return 0;
+ if (!s->user)
+ return 0;
+
if (s->fifo_fd >= 0) {
r = pipe_eof(s->fifo_fd);
}
int session_kill(Session *s, KillWho who, int signo) {
+ _cleanup_set_free_ Set *pid_set = NULL;
int r = 0;
- Set *pid_set = NULL;
assert(s);
pid_set = set_new(trivial_hash_func, trivial_compare_func);
if (!pid_set)
- return -ENOMEM;
+ return log_oom();
if (s->leader > 0) {
q = set_put(pid_set, LONG_TO_PTR(s->leader));
r = q;
}
- if (pid_set)
- set_free(pid_set);
-
return r;
}
static const char* const session_class_table[_SESSION_CLASS_MAX] = {
[SESSION_USER] = "user",
[SESSION_GREETER] = "greeter",
- [SESSION_LOCK_SCREEN] = "lock-screen"
+ [SESSION_LOCK_SCREEN] = "lock-screen",
+ [SESSION_BACKGROUND] = "background"
};
DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass);
~ianmdlvl / elogind.git / blobdiff