This source file includes following definitions.
- property_get_user
- property_get_name
- property_get_seat
- property_get_active
- property_get_state
- property_get_idle_hint
- property_get_idle_since_hint
- method_terminate
- method_activate
- method_lock
- method_set_idle_hint
- method_kill
- method_take_control
- method_release_control
- method_take_device
- method_release_device
- method_pause_device_complete
- session_object_find
- session_bus_path
- session_node_enumerator
- session_send_signal
- session_send_changed
- session_send_lock
- session_send_lock_all
- session_send_create_reply
#include <errno.h>
#include <string.h>
#include <sys/capability.h>
#include "util.h"
#include "strv.h"
#include "bus-util.h"
#include "bus-errors.h"
#include "bus-label.h"
#include "logind.h"
#include "logind-session.h"
#include "logind-session-device.h"
static int property_get_user(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
p = user_bus_path(s->user);
if (!p)
return -ENOMEM;
return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->uid, p);
}
static int property_get_name(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "s", s->user->name);
}
static int property_get_seat(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
p = s->seat ? seat_bus_path(s->seat) : strdup("/");
if (!p)
return -ENOMEM;
return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p);
}
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType);
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass);
static int property_get_active(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", session_is_active(s));
}
static int property_get_state(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "s", session_state_to_string(session_get_state(s)));
}
static int property_get_idle_hint(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Session *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0);
}
static int property_get_idle_since_hint(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
Session *s = userdata;
dual_timestamp t;
uint64_t u;
int r;
assert(bus);
assert(reply);
assert(s);
r = session_get_idle_hint(s, &t);
if (r < 0)
return r;
u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
return sd_bus_message_append(reply, "t", u);
}
static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
int r;
assert(bus);
assert(message);
assert(s);
r = session_stop(s, true);
if (r < 0)
return r;
return sd_bus_reply_method_return(message, NULL);
}
static int method_activate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
int r;
assert(bus);
assert(message);
assert(s);
r = session_activate(s);
if (r < 0)
return r;
return sd_bus_reply_method_return(message, NULL);
}
static int method_lock(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
int r;
assert(bus);
assert(message);
assert(s);
r = session_send_lock(s, streq(sd_bus_message_get_member(message), "Lock"));
if (r < 0)
return r;
return sd_bus_reply_method_return(message, NULL);
}
static int method_set_idle_hint(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
Session *s = userdata;
uid_t uid;
int r, b;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "b", &b);
if (r < 0)
return r;
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_UID, &creds);
if (r < 0)
return r;
r = sd_bus_creds_get_uid(creds, &uid);
if (r < 0)
return r;
if (uid != 0 && uid != s->user->uid)
return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint");
session_set_idle_hint(s, b);
return sd_bus_reply_method_return(message, NULL);
}
static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
const char *swho;
int32_t signo;
KillWho who;
int r;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "si", &swho, &signo);
if (r < 0)
return r;
if (isempty(swho))
who = KILL_ALL;
else {
who = kill_who_from_string(swho);
if (who < 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
}
if (signo <= 0 || signo >= _NSIG)
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
r = session_kill(s, who, signo);
if (r < 0)
return r;
return sd_bus_reply_method_return(message, NULL);
}
static int method_take_control(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
Session *s = userdata;
int r, force;
uid_t uid;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "b", &force);
if (r < 0)
return r;
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_UID, &creds);
if (r < 0)
return r;
r = sd_bus_creds_get_uid(creds, &uid);
if (r < 0)
return r;
if (uid != 0 && (force || uid != s->user->uid))
return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control");
r = session_set_controller(s, sd_bus_message_get_sender(message), force);
if (r < 0)
return r;
return sd_bus_reply_method_return(message, NULL);
}
static int method_release_control(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
assert(bus);
assert(message);
assert(s);
if (!session_is_controller(s, sd_bus_message_get_sender(message)))
return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
session_drop_controller(s);
return sd_bus_reply_method_return(message, NULL);
}
static int method_take_device(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
uint32_t major, minor;
SessionDevice *sd;
dev_t dev;
int r;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "uu", &major, &minor);
if (r < 0)
return r;
if (!session_is_controller(s, sd_bus_message_get_sender(message)))
return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
dev = makedev(major, minor);
sd = hashmap_get(s->devices, &dev);
if (sd)
return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken");
r = session_device_new(s, dev, &sd);
if (r < 0)
return r;
r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active);
if (r < 0)
session_device_free(sd);
return r;
}
static int method_release_device(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
uint32_t major, minor;
SessionDevice *sd;
dev_t dev;
int r;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "uu", &major, &minor);
if (r < 0)
return r;
if (!session_is_controller(s, sd_bus_message_get_sender(message)))
return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
dev = makedev(major, minor);
sd = hashmap_get(s->devices, &dev);
if (!sd)
return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
session_device_free(sd);
return sd_bus_reply_method_return(message, NULL);
}
static int method_pause_device_complete(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Session *s = userdata;
uint32_t major, minor;
SessionDevice *sd;
dev_t dev;
int r;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "uu", &major, &minor);
if (r < 0)
return r;
if (!session_is_controller(s, sd_bus_message_get_sender(message)))
return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
dev = makedev(major, minor);
sd = hashmap_get(s->devices, &dev);
if (!sd)
return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
session_device_complete_pause(sd);
return sd_bus_reply_method_return(message, NULL);
}
const sd_bus_vtable session_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST),
BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_METHOD("Terminate", NULL, NULL, method_terminate, SD_BUS_VTABLE_CAPABILITY(CAP_KILL)),
SD_BUS_METHOD("Activate", NULL, NULL, method_activate, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("Lock", NULL, NULL, method_lock, 0),
SD_BUS_METHOD("Unlock", NULL, NULL, method_lock, 0),
SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("Kill", "si", NULL, method_kill, SD_BUS_VTABLE_CAPABILITY(CAP_KILL)),
SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_SIGNAL("PauseDevice", "uus", 0),
SD_BUS_SIGNAL("ResumeDevice", "uuh", 0),
SD_BUS_SIGNAL("Lock", NULL, 0),
SD_BUS_SIGNAL("Unlock", NULL, 0),
SD_BUS_VTABLE_END
};
int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
Manager *m = userdata;
Session *session;
int r;
assert(bus);
assert(path);
assert(interface);
assert(found);
assert(m);
if (streq(path, "/org/freedesktop/login1/session/self")) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
sd_bus_message *message;
pid_t pid;
message = sd_bus_get_current_message(bus);
if (!message)
return 0;
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
if (r < 0)
return r;
r = sd_bus_creds_get_pid(creds, &pid);
if (r < 0)
return r;
r = manager_get_session_by_pid(m, pid, &session);
if (r <= 0)
return 0;
} else {
_cleanup_free_ char *e = NULL;
const char *p;
p = startswith(path, "/org/freedesktop/login1/session/");
if (!p)
return 0;
e = bus_label_unescape(p);
if (!e)
return -ENOMEM;
session = hashmap_get(m->sessions, e);
if (!session)
return 0;
}
*found = session;
return 1;
}
char *session_bus_path(Session *s) {
_cleanup_free_ char *t = NULL;
assert(s);
t = bus_label_escape(s->id);
if (!t)
return NULL;
return strappend("/org/freedesktop/login1/session/", t);
}
int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
_cleanup_strv_free_ char **l = NULL;
Manager *m = userdata;
Session *session;
Iterator i;
int r;
assert(bus);
assert(path);
assert(nodes);
HASHMAP_FOREACH(session, m->sessions, i) {
char *p;
p = session_bus_path(session);
if (!p)
return -ENOMEM;
r = strv_consume(&l, p);
if (r < 0)
return r;
}
*nodes = l;
l = NULL;
return 1;
}
int session_send_signal(Session *s, bool new_session) {
_cleanup_free_ char *p = NULL;
assert(s);
p = session_bus_path(s);
if (!p)
return -ENOMEM;
return sd_bus_emit_signal(
s->manager->bus,
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
new_session ? "SessionNew" : "SessionRemoved",
"so", s->id, p);
}
int session_send_changed(Session *s, const char *properties, ...) {
_cleanup_free_ char *p = NULL;
char **l;
assert(s);
if (!s->started)
return 0;
p = session_bus_path(s);
if (!p)
return -ENOMEM;
l = strv_from_stdarg_alloca(properties);
return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l);
}
int session_send_lock(Session *s, bool lock) {
_cleanup_free_ char *p = NULL;
assert(s);
p = session_bus_path(s);
if (!p)
return -ENOMEM;
return sd_bus_emit_signal(
s->manager->bus,
p,
"org.freedesktop.login1.Session",
lock ? "Lock" : "Unlock",
NULL);
}
int session_send_lock_all(Manager *m, bool lock) {
Session *session;
Iterator i;
int r = 0;
assert(m);
HASHMAP_FOREACH(session, m->sessions, i) {
int k;
k = session_send_lock(session, lock);
if (k < 0)
r = k;
}
return r;
}
int session_send_create_reply(Session *s, sd_bus_error *error) {
_cleanup_bus_message_unref_ sd_bus_message *c = NULL;
_cleanup_close_ int fifo_fd = -1;
_cleanup_free_ char *p = NULL;
assert(s);
if (!s->create_message)
return 0;
if (!sd_bus_error_is_set(error) && (s->scope_job || s->user->service_job))
return 0;
c = s->create_message;
s->create_message = NULL;
if (error)
return sd_bus_reply_method_error(c, error);
fifo_fd = session_create_fifo(s);
if (fifo_fd < 0)
return fifo_fd;
session_save(s);
p = session_bus_path(s);
if (!p)
return -ENOMEM;
log_debug("Sending reply about created session: "
"id=%s object_path=%s uid=%u runtime_path=%s "
"session_fd=%d seat=%s vtnr=%u",
s->id,
p,
(uint32_t) s->user->uid,
s->user->runtime_path,
fifo_fd,
s->seat ? s->seat->id : "",
(uint32_t) s->vtnr);
return sd_bus_reply_method_return(
c, "soshusub",
s->id,
p,
s->user->runtime_path,
fifo_fd,
(uint32_t) s->user->uid,
s->seat ? s->seat->id : "",
(uint32_t) s->vtnr,
false);
}