test-bus-chat.c revision 49e5de64e22ea4794092b91393545ab08e658e0a
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 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 <assert.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>
#include <fcntl.h>
#include "log.h"
#include "util.h"
#include "macro.h"
#include "sd-bus.h"
#include "bus-message.h"
#include "bus-error.h"
static int object_callback(sd_bus *bus, int error, sd_bus_message *m, void *userdata) {
int r;
assert(bus);
if (error != 0)
return 0;
if (sd_bus_message_is_method_call(m, "org.object.test", "Foobar")) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
log_info("Invoked Foobar() on %s", sd_bus_message_get_path(m));
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
return r;
}
r = sd_bus_send(bus, reply, NULL);
if (r < 0) {
log_error("Failed to send reply: %s", strerror(-r));
return r;
}
return 1;
}
return 0;
}
static int server_init(sd_bus **_bus) {
sd_bus *bus = NULL;
sd_id128_t id;
int r;
const char *unique;
assert(_bus);
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to user bus: %s", strerror(-r));
goto fail;
}
r = sd_bus_get_peer(bus, &id);
if (r < 0) {
log_error("Failed to get peer ID: %s", strerror(-r));
goto fail;
}
r = sd_bus_get_unique_name(bus, &unique);
if (r < 0) {
log_error("Failed to get unique name: %s", strerror(-r));
goto fail;
}
log_info("Peer ID is " SD_ID128_FORMAT_STR ".", SD_ID128_FORMAT_VAL(id));
log_info("Unique ID: %s", unique);
log_info("Can send file handles: %i", sd_bus_can_send(bus, 'h'));
r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0);
if (r < 0) {
log_error("Failed to acquire name: %s", strerror(-r));
goto fail;
}
r = sd_bus_add_fallback(bus, "/foo/bar", object_callback, NULL);
if (r < 0) {
log_error("Failed to add object: %s", strerror(-r));
goto fail;
}
*_bus = bus;
return 0;
fail:
if (bus)
sd_bus_unref(bus);
return r;
}
static int server(sd_bus *bus) {
int r;
bool client1_gone = false, client2_gone = false;
while (!client1_gone || !client2_gone) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
pid_t pid = 0;
r = sd_bus_process(bus, &m);
if (r < 0) {
log_error("Failed to process requests: %s", strerror(-r));
goto fail;
}
if (r == 0) {
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
log_error("Failed to wait: %s", strerror(-r));
goto fail;
}
continue;
}
if (!m)
continue;
sd_bus_message_get_pid(m, &pid);
log_info("Got message! member=%s pid=%lu label=%s", strna(sd_bus_message_get_member(m)), (unsigned long) pid, strna(sd_bus_message_get_label(m)));
/* bus_message_dump(m); */
/* sd_bus_message_rewind(m, true); */
if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) {
const char *hello;
_cleanup_free_ char *lowercase = NULL;
r = sd_bus_message_read(m, "s", &hello);
if (r < 0) {
log_error("Failed to get parameter: %s", strerror(-r));
goto fail;
}
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
lowercase = strdup(hello);
if (!lowercase) {
r = log_oom();
goto fail;
}
ascii_strlower(lowercase);
r = sd_bus_message_append(reply, "s", lowercase);
if (r < 0) {
log_error("Failed to append message: %s", strerror(-r));
goto fail;
}
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "ExitClient1")) {
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
client1_gone = true;
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "ExitClient2")) {
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
client2_gone = true;
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Slow")) {
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
sleep(1);
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "FileDescriptor")) {
int fd;
static const char x = 'X';
r = sd_bus_message_read(m, "h", &fd);
if (r < 0) {
log_error("Failed to get parameter: %s", strerror(-r));
goto fail;
}
if (write(fd, &x, 1) < 0) {
log_error("Failed to write to fd: %m");
close_nointr_nofail(fd);
goto fail;
}
close_nointr_nofail(fd);
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
} else if (sd_bus_message_is_method_call(m, NULL, NULL)) {
const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownMethod", "Unknown method.");
r = sd_bus_message_new_method_error(bus, m, &e, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
}
if (reply) {
r = sd_bus_send(bus, reply, NULL);
if (r < 0) {
log_error("Failed to send reply: %s", strerror(-r));
goto fail;
}
/* log_info("Sent"); */
/* bus_message_dump(reply); */
/* sd_bus_message_rewind(reply, true); */
}
}
r = 0;
fail:
if (bus) {
sd_bus_flush(bus);
sd_bus_unref(bus);
}
return r;
}
static void* client1(void*p) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
sd_bus *bus = NULL;
sd_bus_error error = SD_BUS_ERROR_INIT;
const char *hello;
int r;
int pp[2] = { -1, -1 };
char x;
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to user bus: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"LowerCase",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_append(m, "s", "HELLO");
if (r < 0) {
log_error("Failed to append string: %s", strerror(-r));
goto finish;
}
r = sd_bus_send_with_reply_and_block(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
goto finish;
}
r = sd_bus_message_read(reply, "s", &hello);
if (r < 0) {
log_error("Failed to get string: %s", strerror(-r));
goto finish;
}
assert(streq(hello, "hello"));
if (pipe2(pp, O_CLOEXEC|O_NONBLOCK) < 0) {
log_error("Failed to allocate pipe: %m");
r = -errno;
goto finish;
}
sd_bus_message_unref(m);
m = NULL;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"FileDescriptor",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_append(m, "h", pp[1]);
if (r < 0) {
log_error("Failed to append string: %s", strerror(-r));
goto finish;
}
sd_bus_message_unref(reply);
reply = NULL;
r = sd_bus_send_with_reply_and_block(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
goto finish;
}
errno = 0;
if (read(pp[0], &x, 1) <= 0) {
log_error("Failed to read from pipe: %s", errno ? strerror(errno) : "early read");
goto finish;
}
r = 0;
finish:
if (bus) {
_cleanup_bus_message_unref_ sd_bus_message *q;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"ExitClient1",
&q);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
sd_bus_send(bus, q, NULL);
sd_bus_flush(bus);
sd_bus_unref(bus);
}
sd_bus_error_free(&error);
close_pipe(pp);
return INT_TO_PTR(r);
}
static int quit_callback(sd_bus *b, int ret, sd_bus_message *m, void *userdata) {
bool *x = userdata;
log_error("Quit callback: %s", strerror(ret));
*x = 1;
return 1;
}
static void* client2(void*p) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
sd_bus *bus = NULL;
sd_bus_error error = SD_BUS_ERROR_INIT;
bool quit = false;
const char *mid;
int r;
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to user bus: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/foo/bar/waldo/piep",
"org.object.test",
"Foobar",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_send(bus, m, NULL);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
goto finish;
}
sd_bus_message_unref(m);
m = NULL;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.DBus.Peer",
"GetMachineId",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_send_with_reply_and_block(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
goto finish;
}
r = sd_bus_message_read(reply, "s", &mid);
if (r < 0) {
log_error("Failed to parse machine ID: %s", strerror(-r));
goto finish;
}
log_info("Machine ID is %s.", mid);
sd_bus_message_unref(m);
m = NULL;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"Slow",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
sd_bus_message_unref(reply);
reply = NULL;
r = sd_bus_send_with_reply_and_block(bus, m, 200 * USEC_PER_MSEC, &error, &reply);
if (r < 0)
log_info("Failed to issue method call: %s", bus_error_message(&error, -r));
else
log_info("Slow call succeed.");
sd_bus_message_unref(m);
m = NULL;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"Slow",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_send_with_reply(bus, m, quit_callback, &quit, 200 * USEC_PER_MSEC, NULL);
if (r < 0) {
log_info("Failed to issue method call: %s", bus_error_message(&error, -r));
goto finish;
}
while (!quit) {
r = sd_bus_process(bus, NULL);
if (r < 0) {
log_error("Failed to process requests: %s", strerror(-r));
goto finish;
}
if (r == 0) {
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
log_error("Failed to wait: %s", strerror(-r));
goto finish;
}
}
}
r = 0;
finish:
if (bus) {
_cleanup_bus_message_unref_ sd_bus_message *q;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"ExitClient2",
&q);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
sd_bus_send(bus, q, NULL);
sd_bus_flush(bus);
sd_bus_unref(bus);
}
sd_bus_error_free(&error);
return INT_TO_PTR(r);
}
int main(int argc, char *argv[]) {
pthread_t c1, c2;
sd_bus *bus;
void *p;
int q, r;
r = server_init(&bus);
if (r < 0) {
log_info("Failed to connect to bus, skipping tests.");
return EXIT_TEST_SKIP;
}
log_info("Initialized...");
r = pthread_create(&c1, NULL, client1, bus);
if (r != 0)
return EXIT_FAILURE;
r = pthread_create(&c2, NULL, client2, bus);
if (r != 0)
return EXIT_FAILURE;
r = server(bus);
q = pthread_join(c1, &p);
if (q != 0)
return EXIT_FAILURE;
q = pthread_join(c2, &p);
if (q != 0)
return EXIT_FAILURE;
if (r < 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}