243 lines
7.4 KiB
C
243 lines
7.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <assert.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include "log.h"
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#include "util.h"
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#include "sd-bus.h"
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#include "bus-message.h"
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static int server_init(sd_bus **_bus) {
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sd_bus *bus = NULL;
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int r;
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assert(_bus);
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r = sd_bus_open_user(&bus);
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if (r < 0) {
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log_error("Failed to connect to user bus: %s", strerror(-r));
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goto fail;
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}
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r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0);
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if (r < 0) {
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log_error("Failed to acquire name: %s", strerror(-r));
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goto fail;
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}
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*_bus = bus;
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return 0;
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fail:
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if (bus)
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sd_bus_unref(bus);
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return r;
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}
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static void* server(void *p) {
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sd_bus *bus = p;
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int r;
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for (;;) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
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r = sd_bus_process(bus, &m);
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if (r < 0) {
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log_error("Failed to process requests: %s", strerror(-r));
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goto fail;
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}
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if (r == 0) {
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r = sd_bus_wait(bus, (uint64_t) -1);
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if (r < 0) {
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log_error("Failed to wait: %s", strerror(-r));
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goto fail;
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}
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continue;
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}
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log_info("Got message! %s", strna(sd_bus_message_get_member(m)));
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/* bus_message_dump(m); */
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/* sd_bus_message_rewind(m, true); */
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if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) {
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const char *hello;
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_cleanup_free_ char *lowercase = NULL;
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r = sd_bus_message_read(m, "s", &hello);
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if (r < 0) {
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log_error("Failed to get parameter: %s", strerror(-r));
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goto fail;
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}
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r = sd_bus_message_new_method_return(bus, m, &reply);
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if (r < 0) {
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log_error("Failed to allocate return: %s", strerror(-r));
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goto fail;
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}
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lowercase = strdup(hello);
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if (!lowercase) {
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r = log_oom();
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goto fail;
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}
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ascii_strlower(lowercase);
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r = sd_bus_message_append(reply, "s", lowercase);
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if (r < 0) {
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log_error("Failed to append message: %s", strerror(-r));
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goto fail;
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}
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Exit"))
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break;
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else if (sd_bus_message_is_method_call(m, NULL, NULL)) {
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const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownMethod", "Unknown method.");
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r = sd_bus_message_new_method_error(bus, m, &e, &reply);
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if (r < 0) {
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log_error("Failed to allocate return: %s", strerror(-r));
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goto fail;
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}
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}
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if (reply) {
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r = sd_bus_send(bus, reply, NULL);
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if (r < 0) {
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log_error("Failed to send reply: %s", strerror(-r));
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goto fail;
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}
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}
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}
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r = 0;
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fail:
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if (bus)
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sd_bus_unref(bus);
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return INT_TO_PTR(r);
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}
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static int client(void) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
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sd_bus *bus = NULL;
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sd_bus_error error = SD_BUS_ERROR_INIT;
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const char *hello;
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int r;
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r = sd_bus_open_user(&bus);
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if (r < 0) {
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log_error("Failed to connect to user bus: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_message_new_method_call(
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bus,
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"org.freedesktop.systemd.test",
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"/",
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"org.freedesktop.systemd.test",
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"LowerCase",
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&m);
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if (r < 0) {
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log_error("Failed to allocate method call: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_message_append(m, "s", "HELLO");
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if (r < 0) {
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log_error("Failed to append string: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_send_with_reply_and_block(bus, m, (uint64_t) -1, &error, &reply);
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if (r < 0) {
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log_error("Failed to issue method call: %s", error.message);
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goto finish;
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}
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r = sd_bus_message_read(reply, "s", &hello);
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if (r < 0) {
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log_error("Failed to get string: %s", strerror(-r));
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goto finish;
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}
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assert(streq(hello, "hello"));
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r = 0;
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finish:
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if (bus) {
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_cleanup_bus_message_unref_ sd_bus_message *q;
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r = sd_bus_message_new_method_call(
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bus,
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"org.freedesktop.systemd.test",
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"/",
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"org.freedesktop.systemd.test",
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"Exit",
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&q);
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if (r < 0) {
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log_error("Failed to allocate method call: %s", strerror(-r));
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goto finish;
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}
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sd_bus_send(bus, q, NULL);
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sd_bus_flush(bus);
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sd_bus_unref(bus);
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}
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sd_bus_error_free(&error);
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return r;
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}
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int main(int argc, char *argv[]) {
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pthread_t t;
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sd_bus *bus;
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void *p;
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int q, r;
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r = server_init(&bus);
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if (r < 0)
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return EXIT_FAILURE;
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r = pthread_create(&t, NULL, server, bus);
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if (r != 0) {
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sd_bus_unref(bus);
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return EXIT_FAILURE;
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}
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r = client();
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q = pthread_join(t, &p);
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if (q != 0)
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return EXIT_FAILURE;
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if (r < 0)
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return EXIT_FAILURE;
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return EXIT_SUCCESS;
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}
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