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-rw-r--r--src/core/dbus-job.c354
1 files changed, 354 insertions, 0 deletions
diff --git a/src/core/dbus-job.c b/src/core/dbus-job.c
new file mode 100644
index 0000000000..ab6d610243
--- /dev/null
+++ b/src/core/dbus-job.c
@@ -0,0 +1,354 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 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 "dbus.h"
+#include "log.h"
+#include "dbus-job.h"
+#include "dbus-common.h"
+
+#define BUS_JOB_INTERFACE \
+ " <interface name=\"org.freedesktop.systemd1.Job\">\n" \
+ " <method name=\"Cancel\"/>\n" \
+ " <property name=\"Id\" type=\"u\" access=\"read\"/>\n" \
+ " <property name=\"Unit\" type=\"(so)\" access=\"read\"/>\n" \
+ " <property name=\"JobType\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \
+ " </interface>\n"
+
+#define INTROSPECTION \
+ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
+ "<node>\n" \
+ BUS_JOB_INTERFACE \
+ BUS_PROPERTIES_INTERFACE \
+ BUS_PEER_INTERFACE \
+ BUS_INTROSPECTABLE_INTERFACE \
+ "</node>\n"
+
+const char bus_job_interface[] _introspect_("Job") = BUS_JOB_INTERFACE;
+
+#define INTERFACES_LIST \
+ BUS_GENERIC_INTERFACES_LIST \
+ "org.freedesktop.systemd1.Job\0"
+
+#define INVALIDATING_PROPERTIES \
+ "State\0"
+
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_state, job_state, JobState);
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_type, job_type, JobType);
+
+static int bus_job_append_unit(DBusMessageIter *i, const char *property, void *data) {
+ Job *j = data;
+ DBusMessageIter sub;
+ char *p;
+
+ assert(i);
+ assert(property);
+ assert(j);
+
+ if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
+ return -ENOMEM;
+
+ if (!(p = unit_dbus_path(j->unit)))
+ return -ENOMEM;
+
+ if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &j->unit->id) ||
+ !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 const BusProperty bus_job_properties[] = {
+ { "Id", bus_property_append_uint32, "u", offsetof(Job, id) },
+ { "State", bus_job_append_state, "s", offsetof(Job, state) },
+ { "JobType", bus_job_append_type, "s", offsetof(Job, type) },
+ { "Unit", bus_job_append_unit, "(so)", 0 },
+ { NULL, }
+};
+
+static DBusHandlerResult bus_job_message_dispatch(Job *j, DBusConnection *connection, DBusMessage *message) {
+ DBusMessage *reply = NULL;
+
+ if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Job", "Cancel")) {
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ job_finish_and_invalidate(j, JOB_CANCELED);
+
+ } else {
+ const BusBoundProperties bps[] = {
+ { "org.freedesktop.systemd1.Job", bus_job_properties, j },
+ { 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);
+
+ return DBUS_HANDLER_RESULT_NEED_MEMORY;
+}
+
+static DBusHandlerResult bus_job_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
+ Manager *m = data;
+ Job *j;
+ int r;
+ DBusMessage *reply;
+
+ assert(connection);
+ assert(message);
+ assert(m);
+
+ if (streq(dbus_message_get_path(message), "/org/freedesktop/systemd1/job")) {
+ /* Be nice to gdbus and return introspection data for our mid-level paths */
+
+ if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+ char *introspection = NULL;
+ FILE *f;
+ Iterator i;
+ size_t size;
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ /* We roll our own introspection code here, instead of
+ * relying on bus_default_message_handler() because we
+ * need to generate our introspection string
+ * dynamically. */
+
+ if (!(f = open_memstream(&introspection, &size)))
+ goto oom;
+
+ fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
+ "<node>\n", f);
+
+ fputs(BUS_INTROSPECTABLE_INTERFACE, f);
+ fputs(BUS_PEER_INTERFACE, f);
+
+ HASHMAP_FOREACH(j, m->jobs, i)
+ fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
+
+ fputs("</node>\n", f);
+
+ if (ferror(f)) {
+ fclose(f);
+ free(introspection);
+ goto oom;
+ }
+
+ fclose(f);
+
+ if (!introspection)
+ goto oom;
+
+ if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
+ free(introspection);
+ goto oom;
+ }
+
+ free(introspection);
+
+ if (!dbus_connection_send(connection, reply, NULL))
+ goto oom;
+
+ dbus_message_unref(reply);
+
+ return DBUS_HANDLER_RESULT_HANDLED;
+ }
+
+ return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+ }
+
+ if ((r = manager_get_job_from_dbus_path(m, dbus_message_get_path(message), &j)) < 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 job");
+ return bus_send_error_reply(connection, message, &e, r);
+ }
+
+ return bus_send_error_reply(connection, message, NULL, r);
+ }
+
+ return bus_job_message_dispatch(j, connection, message);
+
+oom:
+ if (reply)
+ dbus_message_unref(reply);
+
+ return DBUS_HANDLER_RESULT_NEED_MEMORY;
+}
+
+const DBusObjectPathVTable bus_job_vtable = {
+ .message_function = bus_job_message_handler
+};
+
+static int job_send_message(Job *j, DBusMessage *m) {
+ int r;
+
+ assert(j);
+ assert(m);
+
+ if (bus_has_subscriber(j->manager)) {
+ if ((r = bus_broadcast(j->manager, m)) < 0)
+ return r;
+
+ } else if (j->bus_client) {
+ /* If nobody is subscribed, we just send the message
+ * to the client which created the job */
+
+ assert(j->bus);
+
+ if (!dbus_message_set_destination(m, j->bus_client))
+ return -ENOMEM;
+
+ if (!dbus_connection_send(j->bus, m, NULL))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void bus_job_send_change_signal(Job *j) {
+ char *p = NULL;
+ DBusMessage *m = NULL;
+
+ assert(j);
+
+ if (j->in_dbus_queue) {
+ LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j);
+ j->in_dbus_queue = false;
+ }
+
+ if (!bus_has_subscriber(j->manager) && !j->bus_client) {
+ j->sent_dbus_new_signal = true;
+ return;
+ }
+
+ if (!(p = job_dbus_path(j)))
+ goto oom;
+
+ if (j->sent_dbus_new_signal) {
+ /* Send a properties changed signal */
+
+ if (!(m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Job", INVALIDATING_PROPERTIES)))
+ goto oom;
+
+ } else {
+ /* Send a new signal */
+
+ if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobNew")))
+ goto oom;
+
+ if (!dbus_message_append_args(m,
+ DBUS_TYPE_UINT32, &j->id,
+ DBUS_TYPE_OBJECT_PATH, &p,
+ DBUS_TYPE_INVALID))
+ goto oom;
+ }
+
+ if (job_send_message(j, m) < 0)
+ goto oom;
+
+ free(p);
+ dbus_message_unref(m);
+
+ j->sent_dbus_new_signal = true;
+
+ return;
+
+oom:
+ free(p);
+
+ if (m)
+ dbus_message_unref(m);
+
+ log_error("Failed to allocate job change signal.");
+}
+
+void bus_job_send_removed_signal(Job *j) {
+ char *p = NULL;
+ DBusMessage *m = NULL;
+ const char *r;
+
+ assert(j);
+
+ if (!bus_has_subscriber(j->manager) && !j->bus_client)
+ return;
+
+ if (!j->sent_dbus_new_signal)
+ bus_job_send_change_signal(j);
+
+ if (!(p = job_dbus_path(j)))
+ goto oom;
+
+ if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved")))
+ goto oom;
+
+ r = job_result_to_string(j->result);
+
+ if (!dbus_message_append_args(m,
+ DBUS_TYPE_UINT32, &j->id,
+ DBUS_TYPE_OBJECT_PATH, &p,
+ DBUS_TYPE_STRING, &r,
+ DBUS_TYPE_INVALID))
+ goto oom;
+
+ if (job_send_message(j, m) < 0)
+ goto oom;
+
+ free(p);
+ dbus_message_unref(m);
+
+ return;
+
+oom:
+ free(p);
+
+ if (m)
+ dbus_message_unref(m);
+
+ log_error("Failed to allocate job remove signal.");
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 16:47:25 +0000