Fork of Original Code Base: anongit.freedesktop.org/systemd

This is the initial fork of the code base from freedsktop.org.
The code is provided here as a reference of the initial starting
point and for possible future checkouts after a large portion
of this code is removed.

Merge git://anongit.freedesktop.org/systemd/systemd

1 files changed, 590 insertions, 0 deletions

diff --git a/src/login/logind-session-dbus.c b/src/login/logind-session-dbus.c
new file mode 100644
index 0000000000..ef73cd434a
--- /dev/null
+++ b/src/login/logind-session-dbus.c
@@ -0,0 +1,590 @@
+/*-*- 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 "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"                                                 \
+        "  <signal name=\"Lock\"/>\n"                                   \
+        "  <signal name=\"Unlock\"/>\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=\"DefaultControlGroup\" 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=\"Class\" type=\"s\" access=\"read\"/>\n"     \
+        "  <property name=\"Active\" type=\"b\" access=\"read\"/>\n"    \
+        "  <property name=\"State\" type=\"s\" 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;
+        User *u = data;
+        char *p = NULL;
+
+        assert(i);
+        assert(property);
+        assert(u);
+
+        if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
+                return -ENOMEM;
+
+        p = user_bus_path(u);
+        if (!p)
+                return -ENOMEM;
+
+        if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->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;
+        int r;
+
+        assert(i);
+        assert(property);
+        assert(s);
+
+        r = session_get_idle_hint(s, &t);
+        if (r < 0)
+                return r;
+
+        u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
+
+        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
+                return -ENOMEM;
+
+        return 0;
+}
+
+static int bus_session_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
+        Session *s = data;
+        char *t;
+        int r;
+        bool success;
+
+        assert(i);
+        assert(property);
+        assert(s);
+
+        r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, &t);
+        if (r < 0)
+                return r;
+
+        success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
+        free(t);
+
+        return success ? 0 : -ENOMEM;
+}
+
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType);
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_class, session_class, SessionClass);
+
+static int bus_session_append_state(DBusMessageIter *i, const char *property, void *data) {
+        Session *s = data;
+        const char *state;
+
+        assert(i);
+        assert(property);
+        assert(s);
+
+        state = session_state_to_string(session_get_state(s));
+
+        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
+                return -ENOMEM;
+
+        return 0;
+}
+
+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 const BusProperty bus_login_session_properties[] = {
+        { "Id",                     bus_property_append_string,         "s", offsetof(Session, id),                 true },
+        { "Timestamp",              bus_property_append_usec,           "t", offsetof(Session, timestamp.realtime)  },
+        { "TimestampMonotonic",     bus_property_append_usec,           "t", offsetof(Session, timestamp.monotonic) },
+        { "DefaultControlGroup",    bus_session_append_default_cgroup,  "s", 0,                                     },
+        { "VTNr",                   bus_property_append_uint32,         "u", offsetof(Session, vtnr)                },
+        { "Seat",                   bus_session_append_seat,         "(so)", 0 },
+        { "TTY",                    bus_property_append_string,         "s", offsetof(Session, tty),                true },
+        { "Display",                bus_property_append_string,         "s", offsetof(Session, display),            true },
+        { "Remote",                 bus_property_append_bool,           "b", offsetof(Session, remote)              },
+        { "RemoteUser",             bus_property_append_string,         "s", offsetof(Session, remote_user),        true },
+        { "RemoteHost",             bus_property_append_string,         "s", offsetof(Session, remote_host),        true },
+        { "Service",                bus_property_append_string,         "s", offsetof(Session, service),            true },
+        { "Leader",                 bus_property_append_pid,            "u", offsetof(Session, leader)              },
+        { "Audit",                  bus_property_append_uint32,         "u", offsetof(Session, audit_id)            },
+        { "Type",                   bus_session_append_type,            "s", offsetof(Session, type)                },
+        { "Class",                  bus_session_append_class,           "s", offsetof(Session, class)               },
+        { "Active",                 bus_session_append_active,          "b", 0 },
+        { "State",                  bus_session_append_state,           "s", 0 },
+        { "Controllers",            bus_property_append_strv,          "as", offsetof(Session, controllers),        true },
+        { "ResetControllers",       bus_property_append_strv,          "as", offsetof(Session, reset_controllers),  true },
+        { "KillProcesses",          bus_property_append_bool,           "b", offsetof(Session, kill_processes)      },
+        { "IdleHint",               bus_session_append_idle_hint,       "b", 0 },
+        { "IdleSinceHint",          bus_session_append_idle_hint_since, "t", 0 },
+        { "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", 0 },
+        { NULL, }
+};
+
+static const BusProperty bus_login_session_user_properties[] = {
+        { "User",                   bus_session_append_user,         "(uo)", 0 },
+        { "Name",                   bus_property_append_string,         "s", offsetof(User, name),                  true },
+        { NULL, }
+};
+
+static DBusHandlerResult session_message_dispatch(
+                Session *s,
+                DBusConnection *connection,
+                DBusMessage *message) {
+
+        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_lock(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 {
+                const BusBoundProperties bps[] = {
+                        { "org.freedesktop.login1.Session", bus_login_session_properties,      s       },
+                        { "org.freedesktop.login1.Session", bus_login_session_user_properties, s->user },
+                        { NULL, }
+                };
+                return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps);
+        }
+
+        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;
+}
+
+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;
+}