logind-user-dbus.c revision 927b1649448b812a7620ad013f4752d597b12407
/*-*- 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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <string.h>
#include "strv.h"
#include "bus-util.h"
#include "logind.h"
#include "logind-user.h"
static int property_get_display(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
_cleanup_free_ char *p = NULL;
User *u = userdata;
assert(bus);
assert(reply);
assert(u);
p = u->display ? session_bus_path(u->display) : strdup("/");
if (!p)
return -ENOMEM;
return sd_bus_message_append(reply, "(so)", u->display ? u->display->id : "", p);
}
static int property_get_state(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
User *u = userdata;
assert(bus);
assert(reply);
assert(u);
return sd_bus_message_append(reply, "s", user_state_to_string(user_get_state(u)));
}
static int property_get_sessions(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
User *u = userdata;
Session *session;
int r;
assert(bus);
assert(reply);
assert(u);
r = sd_bus_message_open_container(reply, 'a', "(so)");
if (r < 0)
return r;
LIST_FOREACH(sessions_by_user, session, u->sessions) {
_cleanup_free_ char *p = NULL;
p = session_bus_path(session);
if (!p)
return -ENOMEM;
r = sd_bus_message_append(reply, "(so)", session->id, p);
if (r < 0)
return r;
}
r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
return 1;
}
static int property_get_idle_hint(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
User *u = userdata;
assert(bus);
assert(reply);
assert(u);
return sd_bus_message_append(reply, "b", user_get_idle_hint(u, 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,
sd_bus_error *error,
void *userdata) {
User *u = userdata;
dual_timestamp t;
uint64_t k;
assert(bus);
assert(reply);
assert(u);
user_get_idle_hint(u, &t);
k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
return sd_bus_message_append(reply, "t", k);
}
static int property_get_linger(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
User *u = userdata;
int r;
assert(bus);
assert(reply);
assert(u);
r = user_check_linger_file(u);
return sd_bus_message_append(reply, "b", r > 0);
}
static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata) {
User *u = userdata;
int r;
assert(bus);
assert(message);
assert(u);
r = user_stop(u);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
return sd_bus_reply_method_return(bus, message, NULL);
}
static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata) {
User *u = userdata;
int32_t signo;
int r;
assert(bus);
assert(message);
assert(u);
r = sd_bus_message_read(message, "i", &signo);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
if (signo <= 0 || signo >= _NSIG)
return sd_bus_reply_method_errorf(bus, message, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
r = user_kill(u, signo);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
return sd_bus_reply_method_return(bus, message, NULL);
}
const sd_bus_vtable user_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(User, uid), 0),
SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(User, gid), 0),
SD_BUS_PROPERTY("Name", "s", NULL, offsetof(User, name), 0),
SD_BUS_PROPERTY("Timestamp", "t", NULL, offsetof(User, timestamp.realtime), 0),
SD_BUS_PROPERTY("TimestampMonotonic", "t", NULL, offsetof(User, timestamp.monotonic), 0),
SD_BUS_PROPERTY("RuntimePath", "s", NULL, offsetof(User, runtime_path), 0),
SD_BUS_PROPERTY("Service", "s", NULL, offsetof(User, service), 0),
SD_BUS_PROPERTY("Slice", "s", NULL, offsetof(User, slice), 0),
SD_BUS_PROPERTY("Display", "(so)", property_get_display, 0, 0),
SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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_PROPERTY("Linger", "b", property_get_linger, 0, 0),
SD_BUS_METHOD("Terminate", NULL, NULL, method_terminate, 0),
SD_BUS_METHOD("Kill", "i", NULL, method_kill, 0),
SD_BUS_VTABLE_END
};
int user_object_find(sd_bus *bus, const char *path, const char *interface, void **found, void *userdata) {
Manager *m = userdata;
User *user;
int r;
assert(bus);
assert(path);
assert(interface);
assert(found);
assert(m);
if (streq(path, "/org/freedesktop/login1/user/self")) {
sd_bus_message *message;
pid_t pid;
message = sd_bus_get_current(bus);
if (!message)
return 0;
r = sd_bus_get_owner_pid(bus, sd_bus_message_get_sender(message), &pid);
if (r < 0)
return 0;
r = manager_get_user_by_pid(m, pid, &user);
if (r <= 0)
return 0;
} else {
unsigned long lu;
const char *p;
p = startswith(path, "/org/freedesktop/login1/user/_");
if (!p)
return 0;
r = safe_atolu(p, &lu);
if (r < 0)
return 0;
user = hashmap_get(m->users, ULONG_TO_PTR(lu));
if (!user)
return 0;
}
*found = user;
return 1;
}
char *user_bus_path(User *u) {
char *s;
assert(u);
if (asprintf(&s, "/org/freedesktop/login1/user/_%llu", (unsigned long long) u->uid) < 0)
return NULL;
return s;
}
int user_node_enumerator(sd_bus *bus, const char *path, char ***nodes, void *userdata) {
_cleanup_strv_free_ char **l = NULL;
Manager *m = userdata;
User *user;
Iterator i;
int r;
assert(bus);
assert(path);
assert(nodes);
HASHMAP_FOREACH(user, m->users, i) {
char *p;
p = user_bus_path(user);
if (!p)
return -ENOMEM;
r = strv_push(&l, p);
if (r < 0) {
free(p);
return r;
}
}
*nodes = l;
l = NULL;
return 1;
}
int user_send_signal(User *u, bool new_user) {
_cleanup_free_ char *p = NULL;
assert(u);
p = user_bus_path(u);
if (!p)
return -ENOMEM;
return sd_bus_emit_signal(
u->manager->bus,
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
new_user ? "UserNew" : "UserRemoved",
"uo", (uint32_t) u->uid, p);
}
int user_send_changed(User *u, const char *properties, ...) {
_cleanup_free_ char *p = NULL;
char **l;
assert(u);
if (!u->started)
return 0;
p = user_bus_path(u);
if (!p)
return -ENOMEM;
l = strv_from_stdarg_alloca(properties);
return sd_bus_emit_properties_changed_strv(u->manager->bus, p, "org.freedesktop.login1.User", l);
}