[thirdparty/systemd.git] / src / logind-session-dbus.c

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2011 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <errno.h>
#include <string.h>

#include "logind.h"
#include "logind-session.h"
#include "dbus-common.h"
#include "util.h"

#define BUS_SESSION_INTERFACE \
        " <interface name=\"org.freedesktop.login1.Session\">\n"        \
        "  <method name=\"Terminate\"/>\n"                              \
        "  <method name=\"Activate\"/>\n"                               \
        "  <method name=\"Lock\"/>\n"                                   \
        "  <method name=\"Unlock\"/>\n"                                 \
        "  <method name=\"SetIdleHint\">\n"                             \
        "   <arg name=\"b\" type=\"b\"/>\n"                             \
        "  </method>\n"                                                 \
        "  <method name=\"Kill\">\n"                                    \
        "   <arg name=\"who\" type=\"s\"/>\n"                           \
        "   <arg name=\"signal\" type=\"s\"/>\n"                        \
        "  </method>\n"                                                 \
        "  <property name=\"Id\" type=\"s\" access=\"read\"/>\n"        \
        "  <property name=\"User\" type=\"(uo)\" access=\"read\"/>\n"   \
        "  <property name=\"Name\" type=\"s\" access=\"read\"/>\n"      \
        "  <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \
        "  <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
        "  <property name=\"ControlGroupPath\" type=\"s\" access=\"read\"/>\n" \
        "  <property name=\"VTNr\" type=\"u\" access=\"read\"/>\n"      \
        "  <property name=\"Seat\" type=\"(so)\" access=\"read\"/>\n"   \
        "  <property name=\"TTY\" type=\"s\" access=\"read\"/>\n"       \
        "  <property name=\"Display\" type=\"s\" access=\"read\"/>\n"   \
        "  <property name=\"Remote\" type=\"b\" access=\"read\"/>\n"    \
        "  <property name=\"RemoteHost\" type=\"s\" access=\"read\"/>\n" \
        "  <property name=\"RemoteUser\" type=\"s\" access=\"read\"/>\n" \
        "  <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \
        "  <property name=\"Leader\" type=\"u\" access=\"read\"/>\n"    \
        "  <property name=\"Audit\" type=\"u\" access=\"read\"/>\n"     \
        "  <property name=\"Type\" type=\"s\" access=\"read\"/>\n"      \
        "  <property name=\"Active\" type=\"b\" access=\"read\"/>\n"    \
        "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
        "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
        "  <property name=\"KillProcesses\" type=\"b\" access=\"read\"/>\n" \
        "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
        "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
        "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
        " </interface>\n"

#define INTROSPECTION                                                   \
        DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
        "<node>\n"                                                      \
        BUS_SESSION_INTERFACE                                           \
        BUS_PROPERTIES_INTERFACE                                        \
        BUS_PEER_INTERFACE                                              \
        BUS_INTROSPECTABLE_INTERFACE                                    \
        "</node>\n"

#define INTERFACES_LIST                              \
        BUS_GENERIC_INTERFACES_LIST                  \
        "org.freedesktop.login1.Session\0"

static int bus_session_append_seat(DBusMessageIter *i, const char *property, void *data) {
        DBusMessageIter sub;
        Session *s = data;
        const char *id, *path;
        char *p = NULL;

        assert(i);
        assert(property);
        assert(s);

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
                return -ENOMEM;

        if (s->seat) {
                id = s->seat->id;
                path = p = seat_bus_path(s->seat);

                if (!p)
                        return -ENOMEM;
        } else {
                id = "";
                path = "/";
        }

        if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) ||
            !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) {
                free(p);
                return -ENOMEM;
        }

        free(p);

        if (!dbus_message_iter_close_container(i, &sub))
                return -ENOMEM;

        return 0;
}

static int bus_session_append_user(DBusMessageIter *i, const char *property, void *data) {
        DBusMessageIter sub;
        Session *s = data;
        char *p = NULL;

        assert(i);
        assert(property);
        assert(s);

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
                return -ENOMEM;

        p = user_bus_path(s->user);
        if (!p)
                return -ENOMEM;

        if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &s->user->uid) ||
            !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
                free(p);
                return -ENOMEM;
        }

        free(p);

        if (!dbus_message_iter_close_container(i, &sub))
                return -ENOMEM;

        return 0;
}

static int bus_session_append_active(DBusMessageIter *i, const char *property, void *data) {
        Session *s = data;
        dbus_bool_t b;

        assert(i);
        assert(property);
        assert(s);

        b = session_is_active(s);
        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
                return -ENOMEM;

        return 0;
}

static int bus_session_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
        Session *s = data;
        int b;

        assert(i);
        assert(property);
        assert(s);

        b = session_get_idle_hint(s, NULL) > 0;
        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
                return -ENOMEM;

        return 0;
}

static int bus_session_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
        Session *s = data;
        dual_timestamp t;
        uint64_t u;

        assert(i);
        assert(property);
        assert(s);

        session_get_idle_hint(s, &t);
        u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
                return -ENOMEM;

        return 0;
}

static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType);

static int get_session_for_path(Manager *m, const char *path, Session **_s) {
        Session *s;
        char *id;

        assert(m);
        assert(path);
        assert(_s);

        if (!startswith(path, "/org/freedesktop/login1/session/"))
                return -EINVAL;

        id = bus_path_unescape(path + 32);
        if (!id)
                return -ENOMEM;

        s = hashmap_get(m->sessions, id);
        free(id);

        if (!s)
                return -ENOENT;

        *_s = s;
        return 0;
}

static DBusHandlerResult session_message_dispatch(
                Session *s,
                DBusConnection *connection,
                DBusMessage *message) {

        const BusProperty properties[] = {
                { "org.freedesktop.login1.Session", "Id",                 bus_property_append_string,   "s",    s->id                   },
                { "org.freedesktop.login1.Session", "User",               bus_session_append_user,      "(uo)", s                       },
                { "org.freedesktop.login1.Session", "Name",               bus_property_append_string,   "s",    s->user->name           },
                { "org.freedesktop.login1.Session", "Timestamp",          bus_property_append_usec,     "t",    &s->timestamp.realtime  },
                { "org.freedesktop.login1.Session", "TimestampMonotonic", bus_property_append_usec,     "t",    &s->timestamp.monotonic },
                { "org.freedesktop.login1.Session", "ControlGroupPath",   bus_property_append_string,   "s",    s->cgroup_path          },
                { "org.freedesktop.login1.Session", "VTNr",               bus_property_append_uint32,   "u",    &s->vtnr                },
                { "org.freedesktop.login1.Session", "Seat",               bus_session_append_seat,      "(so)", s                       },
                { "org.freedesktop.login1.Session", "TTY",                bus_property_append_string,   "s",    s->tty                  },
                { "org.freedesktop.login1.Session", "Display",            bus_property_append_string,   "s",    s->display              },
                { "org.freedesktop.login1.Session", "Remote",             bus_property_append_bool,     "b",    &s->remote              },
                { "org.freedesktop.login1.Session", "RemoteUser",         bus_property_append_string,   "s",    s->remote_user          },
                { "org.freedesktop.login1.Session", "RemoteHost",         bus_property_append_string,   "s",    s->remote_host          },
                { "org.freedesktop.login1.Session", "Service",            bus_property_append_string,   "s",    s->service              },
                { "org.freedesktop.login1.Session", "Leader",             bus_property_append_pid,      "u",    &s->leader              },
                { "org.freedesktop.login1.Session", "Audit",              bus_property_append_uint32,   "u",    &s->audit_id            },
                { "org.freedesktop.login1.Session", "Type",               bus_session_append_type,      "s",    &s->type                },
                { "org.freedesktop.login1.Session", "Active",             bus_session_append_active,    "b",    s                       },
                { "org.freedesktop.login1.Session", "Controllers",        bus_property_append_strv,     "as",   s->controllers          },
                { "org.freedesktop.login1.Session", "ResetControllers",   bus_property_append_strv,     "as",   s->reset_controllers    },
                { "org.freedesktop.login1.Session", "KillProcesses",      bus_property_append_bool,     "b",    &s->kill_processes      },
                { "org.freedesktop.login1.Session", "IdleHint",           bus_session_append_idle_hint, "b",    s                       },
                { "org.freedesktop.login1.Session", "IdleSinceHint",          bus_session_append_idle_hint_since, "t", s                },
                { "org.freedesktop.login1.Session", "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", s                },
                { NULL, NULL, NULL, NULL, NULL }
        };

        DBusError error;
        DBusMessage *reply = NULL;
        int r;

        assert(s);
        assert(connection);
        assert(message);

        dbus_error_init(&error);

        if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Terminate")) {

                r = session_stop(s);
                if (r < 0)
                        return bus_send_error_reply(connection, message, NULL, r);

                reply = dbus_message_new_method_return(message);
                if (!reply)
                        goto oom;

        } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Activate")) {

                r = session_activate(s);
                if (r < 0)
                        return bus_send_error_reply(connection, message, NULL, r);

                reply = dbus_message_new_method_return(message);
                if (!reply)
                        goto oom;

        } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Lock") ||
                   dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Unlock")) {

                if (session_send_signal(s, streq(dbus_message_get_member(message), "Lock")) < 0)
                        goto oom;

                reply = dbus_message_new_method_return(message);
                if (!reply)
                        goto oom;

        } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) {
                dbus_bool_t b;
                unsigned long ul;

                if (!dbus_message_get_args(
                                    message,
                                    &error,
                                    DBUS_TYPE_BOOLEAN, &b,
                                    DBUS_TYPE_INVALID))
                        return bus_send_error_reply(connection, message, &error, -EINVAL);

                ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error);
                if (ul == (unsigned long) -1)
                        return bus_send_error_reply(connection, message, &error, -EIO);

                if (ul != 0 && ul != s->user->uid)
                        return bus_send_error_reply(connection, message, NULL, -EPERM);

                session_set_idle_hint(s, b);

                reply = dbus_message_new_method_return(message);
                if (!reply)
                        goto oom;

        } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Kill")) {
                const char *swho;
                int32_t signo;
                KillWho who;

                if (!dbus_message_get_args(
                                    message,
                                    &error,
                                    DBUS_TYPE_STRING, &swho,
                                    DBUS_TYPE_INT32, &signo,
                                    DBUS_TYPE_INVALID))
                        return bus_send_error_reply(connection, message, &error, -EINVAL);

                if (isempty(swho))
                        who = KILL_ALL;
                else {
                        who = kill_who_from_string(swho);
                        if (who < 0)
                                return bus_send_error_reply(connection, message, &error, -EINVAL);
                }

                if (signo <= 0 || signo >= _NSIG)
                        return bus_send_error_reply(connection, message, &error, -EINVAL);

                r = session_kill(s, who, signo);
                if (r < 0)
                        return bus_send_error_reply(connection, message, NULL, r);

                reply = dbus_message_new_method_return(message);
                if (!reply)
                        goto oom;

        } else
                return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties);

        if (reply) {
                if (!dbus_connection_send(connection, reply, NULL))
                        goto oom;

                dbus_message_unref(reply);
        }

        return DBUS_HANDLER_RESULT_HANDLED;

oom:
        if (reply)
                dbus_message_unref(reply);

        dbus_error_free(&error);

        return DBUS_HANDLER_RESULT_NEED_MEMORY;
}

static DBusHandlerResult session_message_handler(
                DBusConnection *connection,
                DBusMessage *message,
                void *userdata) {

        Manager *m = userdata;
        Session *s;
        int r;

        r = get_session_for_path(m, dbus_message_get_path(message), &s);
        if (r < 0) {

                if (r == -ENOMEM)
                        return DBUS_HANDLER_RESULT_NEED_MEMORY;

                if (r == -ENOENT) {
                        DBusError e;

                        dbus_error_init(&e);
                        dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown session");
                        return bus_send_error_reply(connection, message, &e, r);
                }

                return bus_send_error_reply(connection, message, NULL, r);
        }

        return session_message_dispatch(s, connection, message);
}

const DBusObjectPathVTable bus_session_vtable = {
        .message_function = session_message_handler
};

char *session_bus_path(Session *s) {
        char *t, *r;

        assert(s);

        t = bus_path_escape(s->id);
        if (!t)
                return NULL;

        r = strappend("/org/freedesktop/login1/session/", t);
        free(t);

        return r;
}

int session_send_signal(Session *s, bool new_session) {
        DBusMessage *m;
        int r = -ENOMEM;
        char *p = NULL;

        assert(s);

        m = dbus_message_new_signal("/org/freedesktop/login1",
                                    "org.freedesktop.login1.Manager",
                                    new_session ? "SessionNew" : "SessionRemoved");

        if (!m)
                return -ENOMEM;

        p = session_bus_path(s);
        if (!p)
                goto finish;

        if (!dbus_message_append_args(
                            m,
                            DBUS_TYPE_STRING, &s->id,
                            DBUS_TYPE_OBJECT_PATH, &p,
                            DBUS_TYPE_INVALID))
                goto finish;

        if (!dbus_connection_send(s->manager->bus, m, NULL))
                goto finish;

        r = 0;

finish:
        dbus_message_unref(m);
        free(p);

        return r;
}

int session_send_changed(Session *s, const char *properties) {
        DBusMessage *m;
        int r = -ENOMEM;
        char *p = NULL;

        assert(s);

        if (!s->started)
                return 0;

        p = session_bus_path(s);
        if (!p)
                return -ENOMEM;

        m = bus_properties_changed_new(p, "org.freedesktop.login1.Session", properties);
        if (!m)
                goto finish;

        if (!dbus_connection_send(s->manager->bus, m, NULL))
                goto finish;

        r = 0;

finish:
        if (m)
                dbus_message_unref(m);
        free(p);

        return r;
}

int session_send_lock(Session *s, bool lock) {
        DBusMessage *m;
        bool b;
        char *p;

        assert(s);

        p = session_bus_path(s);
        if (!p)
                return -ENOMEM;

        m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock");
        free(p);

        if (!m)
                return -ENOMEM;

        b = dbus_connection_send(s->manager->bus, m, NULL);
        dbus_message_unref(m);

        if (!b)
                return -ENOMEM;

        return 0;
}
Commit	Line	Data
3f49d45a LP	1	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/
	2
	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2011 Lennart Poettering
	7
	8	systemd is free software; you can redistribute it and/or modify it
	9	under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	systemd is distributed in the hope that it will be useful, but
	14	WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	20	***/
	21
	22	#include <errno.h>
a185c5aa	23	#include <string.h>
3f49d45a LP	24
	25	#include "logind.h"
	26	#include "logind-session.h"
	27	#include "dbus-common.h"
	28	#include "util.h"
	29
	30	#define BUS_SESSION_INTERFACE \
	31	" <interface name=\"org.freedesktop.login1.Session\">\n" \
	32	" <method name=\"Terminate\"/>\n" \
	33	" <method name=\"Activate\"/>\n" \
f401e48c LP	34	" <method name=\"Lock\"/>\n" \
	35	" <method name=\"Unlock\"/>\n" \
	36	" <method name=\"SetIdleHint\">\n" \
	37	" <arg name=\"b\" type=\"b\"/>\n" \
	38	" </method>\n" \
de07ab16 LP	39	" <method name=\"Kill\">\n" \
	40	" <arg name=\"who\" type=\"s\"/>\n" \
	41	" <arg name=\"signal\" type=\"s\"/>\n" \
	42	" </method>\n" \
e3e9cc80	43	" <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \
3f49d45a LP	44	" <property name=\"User\" type=\"(uo)\" access=\"read\"/>\n" \
3f49d45a LP	45	" <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \
f401e48c LP	46	" <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \
f401e48c LP	47	" <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
3f49d45a LP	48	" <property name=\"ControlGroupPath\" type=\"s\" access=\"read\"/>\n" \
	49	" <property name=\"VTNr\" type=\"u\" access=\"read\"/>\n" \
	50	" <property name=\"Seat\" type=\"(so)\" access=\"read\"/>\n" \
	51	" <property name=\"TTY\" type=\"s\" access=\"read\"/>\n" \
	52	" <property name=\"Display\" type=\"s\" access=\"read\"/>\n" \
	53	" <property name=\"Remote\" type=\"b\" access=\"read\"/>\n" \
	54	" <property name=\"RemoteHost\" type=\"s\" access=\"read\"/>\n" \
	55	" <property name=\"RemoteUser\" type=\"s\" access=\"read\"/>\n" \
98a28fef	56	" <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \
3f49d45a LP	57	" <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \
	58	" <property name=\"Audit\" type=\"u\" access=\"read\"/>\n" \
	59	" <property name=\"Type\" type=\"s\" access=\"read\"/>\n" \
	60	" <property name=\"Active\" type=\"b\" access=\"read\"/>\n" \
	61	" <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
	62	" <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
	63	" <property name=\"KillProcesses\" type=\"b\" access=\"read\"/>\n" \
f401e48c LP	64	" <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \
	65	" <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
	66	" <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
3f49d45a LP	67	" </interface>\n"
	68
	69	#define INTROSPECTION \
	70	DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
	71	"<node>\n" \
	72	BUS_SESSION_INTERFACE \
	73	BUS_PROPERTIES_INTERFACE \
	74	BUS_PEER_INTERFACE \
	75	BUS_INTROSPECTABLE_INTERFACE \
	76	"</node>\n"
	77
	78	#define INTERFACES_LIST \
	79	BUS_GENERIC_INTERFACES_LIST \
	80	"org.freedesktop.login1.Session\0"
	81
	82	static int bus_session_append_seat(DBusMessageIter i, const char property, void *data) {
	83	DBusMessageIter sub;
	84	Session *s = data;
	85	const char id, path;
	86	char *p = NULL;
	87
	88	assert(i);
	89	assert(property);
	90	assert(s);
	91
	92	if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
	93	return -ENOMEM;
	94
	95	if (s->seat) {
	96	id = s->seat->id;
	97	path = p = seat_bus_path(s->seat);
	98
	99	if (!p)
	100	return -ENOMEM;
	101	} else {
	102	id = "";
	103	path = "/";
	104	}
	105
	106	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) \|\|
	107	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) {
	108	free(p);
	109	return -ENOMEM;
	110	}
	111
	112	free(p);
	113
	114	if (!dbus_message_iter_close_container(i, &sub))
	115	return -ENOMEM;
	116
	117	return 0;
	118	}
	119
	120	static int bus_session_append_user(DBusMessageIter i, const char property, void *data) {
	121	DBusMessageIter sub;
	122	Session *s = data;
	123	char *p = NULL;
	124
	125	assert(i);
	126	assert(property);
	127	assert(s);
	128
	129	if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
	130	return -ENOMEM;
131
132	p = user_bus_path(s->user);
133	if (!p)
134	return -ENOMEM;
135
136	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &s->user->uid) \|\|
137	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
138	free(p);
139	return -ENOMEM;
140	}
141
142	free(p);
143
144	if (!dbus_message_iter_close_container(i, &sub))
145	return -ENOMEM;
146
147	return 0;
148	}
149
150	static int bus_session_append_active(DBusMessageIter i, const char property, void *data) {
151	Session *s = data;
77527da0	152	dbus_bool_t b;
3f49d45a LP	153
	154	assert(i);
	155	assert(property);
	156	assert(s);
	157
	158	b = session_is_active(s);
	159	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	160	return -ENOMEM;
	161
	162	return 0;
	163	}
	164
a185c5aa LP	165	static int bus_session_append_idle_hint(DBusMessageIter i, const char property, void *data) {
a185c5aa LP	166	Session *s = data;
77527da0	167	int b;
a185c5aa LP	168
	169	assert(i);
	170	assert(property);
	171	assert(s);
	172
77527da0	173	b = session_get_idle_hint(s, NULL) > 0;
a185c5aa LP	174	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	175	return -ENOMEM;
	176
	177	return 0;
	178	}
	179
	180	static int bus_session_append_idle_hint_since(DBusMessageIter i, const char property, void *data) {
	181	Session *s = data;
	182	dual_timestamp t;
	183	uint64_t u;
	184
	185	assert(i);
	186	assert(property);
	187	assert(s);
	188
	189	session_get_idle_hint(s, &t);
	190	u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
	191
	192	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
	193	return -ENOMEM;
	194
	195	return 0;
	196	}
	197
3f49d45a LP	198	static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType);
	199
	200	static int get_session_for_path(Manager m, const char path, Session **_s) {
	201	Session *s;
	202	char *id;
	203
	204	assert(m);
	205	assert(path);
	206	assert(_s);
	207
	208	if (!startswith(path, "/org/freedesktop/login1/session/"))
	209	return -EINVAL;
	210
	211	id = bus_path_unescape(path + 32);
	212	if (!id)
	213	return -ENOMEM;
	214
	215	s = hashmap_get(m->sessions, id);
	216	free(id);
	217
	218	if (!s)
	219	return -ENOENT;
	220
	221	*_s = s;
	222	return 0;
	223	}
	224
	225	static DBusHandlerResult session_message_dispatch(
	226	Session *s,
	227	DBusConnection *connection,
	228	DBusMessage *message) {
	229
	230	const BusProperty properties[] = {
a185c5aa LP	231	{ "org.freedesktop.login1.Session", "Id", bus_property_append_string, "s", s->id },
	232	{ "org.freedesktop.login1.Session", "User", bus_session_append_user, "(uo)", s },
	233	{ "org.freedesktop.login1.Session", "Name", bus_property_append_string, "s", s->user->name },
	234	{ "org.freedesktop.login1.Session", "Timestamp", bus_property_append_usec, "t", &s->timestamp.realtime },
	235	{ "org.freedesktop.login1.Session", "TimestampMonotonic", bus_property_append_usec, "t", &s->timestamp.monotonic },
	236	{ "org.freedesktop.login1.Session", "ControlGroupPath", bus_property_append_string, "s", s->cgroup_path },
	237	{ "org.freedesktop.login1.Session", "VTNr", bus_property_append_uint32, "u", &s->vtnr },
	238	{ "org.freedesktop.login1.Session", "Seat", bus_session_append_seat, "(so)", s },
	239	{ "org.freedesktop.login1.Session", "TTY", bus_property_append_string, "s", s->tty },
	240	{ "org.freedesktop.login1.Session", "Display", bus_property_append_string, "s", s->display },
	241	{ "org.freedesktop.login1.Session", "Remote", bus_property_append_bool, "b", &s->remote },
	242	{ "org.freedesktop.login1.Session", "RemoteUser", bus_property_append_string, "s", s->remote_user },
	243	{ "org.freedesktop.login1.Session", "RemoteHost", bus_property_append_string, "s", s->remote_host },
98a28fef	244	{ "org.freedesktop.login1.Session", "Service", bus_property_append_string, "s", s->service },
a185c5aa LP	245	{ "org.freedesktop.login1.Session", "Leader", bus_property_append_pid, "u", &s->leader },
	246	{ "org.freedesktop.login1.Session", "Audit", bus_property_append_uint32, "u", &s->audit_id },
	247	{ "org.freedesktop.login1.Session", "Type", bus_session_append_type, "s", &s->type },
	248	{ "org.freedesktop.login1.Session", "Active", bus_session_append_active, "b", s },
	249	{ "org.freedesktop.login1.Session", "Controllers", bus_property_append_strv, "as", s->controllers },
	250	{ "org.freedesktop.login1.Session", "ResetControllers", bus_property_append_strv, "as", s->reset_controllers },
	251	{ "org.freedesktop.login1.Session", "KillProcesses", bus_property_append_bool, "b", &s->kill_processes },
	252	{ "org.freedesktop.login1.Session", "IdleHint", bus_session_append_idle_hint, "b", s },
	253	{ "org.freedesktop.login1.Session", "IdleSinceHint", bus_session_append_idle_hint_since, "t", s },
	254	{ "org.freedesktop.login1.Session", "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", s },
3f49d45a LP	255	{ NULL, NULL, NULL, NULL, NULL }
	256	};
	257
bef422ae LP	258	DBusError error;
	259	DBusMessage *reply = NULL;
	260	int r;
	261
3f49d45a LP	262	assert(s);
	263	assert(connection);
	264	assert(message);
	265
bef422ae LP	266	dbus_error_init(&error);
	267
	268	if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Terminate")) {
	269
	270	r = session_stop(s);
	271	if (r < 0)
	272	return bus_send_error_reply(connection, message, NULL, r);
	273
	274	reply = dbus_message_new_method_return(message);
	275	if (!reply)
	276	goto oom;
	277
	278	} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Activate")) {
	279
	280	r = session_activate(s);
	281	if (r < 0)
	282	return bus_send_error_reply(connection, message, NULL, r);
	283
	284	reply = dbus_message_new_method_return(message);
	285	if (!reply)
	286	goto oom;
	287
	288	} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Lock") \|\|
	289	dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Unlock")) {
bef422ae	290
88e3dc90	291	if (session_send_signal(s, streq(dbus_message_get_member(message), "Lock")) < 0)
bef422ae LP	292	goto oom;
	293
	294	reply = dbus_message_new_method_return(message);
	295	if (!reply)
	296	goto oom;
	297
	298	} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) {
	299	dbus_bool_t b;
5bc849fd	300	unsigned long ul;
bef422ae LP	301
	302	if (!dbus_message_get_args(
	303	message,
	304	&error,
	305	DBUS_TYPE_BOOLEAN, &b,
	306	DBUS_TYPE_INVALID))
	307	return bus_send_error_reply(connection, message, &error, -EINVAL);
	308
5bc849fd LP	309	ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error);
	310	if (ul == (unsigned long) -1)
	311	return bus_send_error_reply(connection, message, &error, -EIO);
	312
	313	if (ul != 0 && ul != s->user->uid)
	314	return bus_send_error_reply(connection, message, NULL, -EPERM);
	315
bef422ae LP	316	session_set_idle_hint(s, b);
	317
	318	reply = dbus_message_new_method_return(message);
	319	if (!reply)
	320	goto oom;
	321
de07ab16 LP	322	} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Kill")) {
	323	const char *swho;
	324	int32_t signo;
	325	KillWho who;
	326
	327	if (!dbus_message_get_args(
	328	message,
	329	&error,
	330	DBUS_TYPE_STRING, &swho,
	331	DBUS_TYPE_INT32, &signo,
	332	DBUS_TYPE_INVALID))
	333	return bus_send_error_reply(connection, message, &error, -EINVAL);
	334
	335	if (isempty(swho))
	336	who = KILL_ALL;
	337	else {
	338	who = kill_who_from_string(swho);
	339	if (who < 0)
	340	return bus_send_error_reply(connection, message, &error, -EINVAL);
	341	}
	342
	343	if (signo <= 0 \|\| signo >= _NSIG)
	344	return bus_send_error_reply(connection, message, &error, -EINVAL);
	345
	346	r = session_kill(s, who, signo);
	347	if (r < 0)
	348	return bus_send_error_reply(connection, message, NULL, r);
	349
	350	reply = dbus_message_new_method_return(message);
	351	if (!reply)
	352	goto oom;
	353
bef422ae LP	354	} else
	355	return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties);
	356
	357	if (reply) {
	358	if (!dbus_connection_send(connection, reply, NULL))
	359	goto oom;
	360
	361	dbus_message_unref(reply);
	362	}
	363
	364	return DBUS_HANDLER_RESULT_HANDLED;
	365
	366	oom:
	367	if (reply)
	368	dbus_message_unref(reply);
	369
	370	dbus_error_free(&error);
	371
	372	return DBUS_HANDLER_RESULT_NEED_MEMORY;
3f49d45a LP	373	}
	374
	375	static DBusHandlerResult session_message_handler(
	376	DBusConnection *connection,
	377	DBusMessage *message,
	378	void *userdata) {
	379
	380	Manager *m = userdata;
	381	Session *s;
	382	int r;
	383
	384	r = get_session_for_path(m, dbus_message_get_path(message), &s);
	385	if (r < 0) {
	386
	387	if (r == -ENOMEM)
	388	return DBUS_HANDLER_RESULT_NEED_MEMORY;
	389
	390	if (r == -ENOENT) {
	391	DBusError e;
	392
	393	dbus_error_init(&e);
	394	dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown session");
	395	return bus_send_error_reply(connection, message, &e, r);
	396	}
	397
	398	return bus_send_error_reply(connection, message, NULL, r);
	399	}
	400
	401	return session_message_dispatch(s, connection, message);
	402	}
	403
	404	const DBusObjectPathVTable bus_session_vtable = {
	405	.message_function = session_message_handler
	406	};
	407
	408	char session_bus_path(Session s) {
	409	char t, r;
	410
	411	assert(s);
	412
	413	t = bus_path_escape(s->id);
	414	if (!t)
	415	return NULL;
	416
	417	r = strappend("/org/freedesktop/login1/session/", t);
	418	free(t);
	419
	420	return r;
	421	}
da119395 LP	422
	423	int session_send_signal(Session *s, bool new_session) {
	424	DBusMessage *m;
	425	int r = -ENOMEM;
	426	char *p = NULL;
	427
	428	assert(s);
	429
	430	m = dbus_message_new_signal("/org/freedesktop/login1",
	431	"org.freedesktop.login1.Manager",
	432	new_session ? "SessionNew" : "SessionRemoved");
	433
	434	if (!m)
	435	return -ENOMEM;
	436
	437	p = session_bus_path(s);
	438	if (!p)
	439	goto finish;
	440
	441	if (!dbus_message_append_args(
	442	m,
	443	DBUS_TYPE_STRING, &s->id,
	444	DBUS_TYPE_OBJECT_PATH, &p,
	445	DBUS_TYPE_INVALID))
	446	goto finish;
	447
	448	if (!dbus_connection_send(s->manager->bus, m, NULL))
	449	goto finish;
	450
	451	r = 0;
	452
	453	finish:
	454	dbus_message_unref(m);
	455	free(p);
	456
	457	return r;
	458	}
9418f147 LP	459
	460	int session_send_changed(Session s, const char properties) {
	461	DBusMessage *m;
	462	int r = -ENOMEM;
	463	char *p = NULL;
	464
	465	assert(s);
	466
ed18b08b LP	467	if (!s->started)
	468	return 0;
	469
9418f147 LP	470	p = session_bus_path(s);
	471	if (!p)
	472	return -ENOMEM;
	473
	474	m = bus_properties_changed_new(p, "org.freedesktop.login1.Session", properties);
	475	if (!m)
	476	goto finish;
	477
	478	if (!dbus_connection_send(s->manager->bus, m, NULL))
	479	goto finish;
	480
	481	r = 0;
	482
	483	finish:
	484	if (m)
	485	dbus_message_unref(m);
	486	free(p);
	487
	488	return r;
	489	}
88e3dc90 LP	490
	491	int session_send_lock(Session *s, bool lock) {
	492	DBusMessage *m;
	493	bool b;
	494	char *p;
	495
	496	assert(s);
	497
	498	p = session_bus_path(s);
	499	if (!p)
	500	return -ENOMEM;
	501
	502	m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock");
	503	free(p);
	504
	505	if (!m)
	506	return -ENOMEM;
	507
	508	b = dbus_connection_send(s->manager->bus, m, NULL);
	509	dbus_message_unref(m);
	510
	511	if (!b)
	512	return -ENOMEM;
	513
	514	return 0;
	515	}