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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <stdlib.h> | |
24 | #include <pthread.h> | |
25 | ||
26 | #include "log.h" | |
27 | #include "util.h" | |
28 | ||
29 | #include "sd-bus.h" | |
30 | #include "bus-message.h" | |
31 | ||
32 | static int server_init(sd_bus **_bus) { | |
33 | sd_bus *bus = NULL; | |
34 | int r; | |
35 | ||
36 | assert(_bus); | |
37 | ||
38 | r = sd_bus_open_user(&bus); | |
39 | if (r < 0) { | |
40 | log_error("Failed to connect to user bus: %s", strerror(-r)); | |
41 | goto fail; | |
42 | } | |
43 | ||
44 | r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0); | |
45 | if (r < 0) { | |
46 | log_error("Failed to acquire name: %s", strerror(-r)); | |
47 | goto fail; | |
48 | } | |
49 | ||
50 | *_bus = bus; | |
51 | return 0; | |
52 | ||
53 | fail: | |
54 | if (bus) | |
55 | sd_bus_unref(bus); | |
56 | ||
57 | return r; | |
58 | } | |
59 | ||
60 | static void* server(void *p) { | |
61 | sd_bus *bus = p; | |
62 | int r; | |
63 | ||
64 | for (;;) { | |
65 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; | |
66 | ||
67 | r = sd_bus_process(bus, &m); | |
68 | if (r < 0) { | |
69 | log_error("Failed to process requests: %s", strerror(-r)); | |
70 | goto fail; | |
71 | } | |
72 | if (r == 0) { | |
73 | r = sd_bus_wait(bus, (uint64_t) -1); | |
74 | if (r < 0) { | |
75 | log_error("Failed to wait: %s", strerror(-r)); | |
76 | goto fail; | |
77 | } | |
78 | ||
79 | continue; | |
80 | } | |
81 | ||
82 | log_info("Got message! %s", strna(sd_bus_message_get_member(m))); | |
83 | /* bus_message_dump(m); */ | |
84 | /* sd_bus_message_rewind(m, true); */ | |
85 | ||
86 | if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) { | |
87 | const char *hello; | |
88 | _cleanup_free_ char *lowercase = NULL; | |
89 | ||
90 | r = sd_bus_message_read(m, "s", &hello); | |
91 | if (r < 0) { | |
92 | log_error("Failed to get parameter: %s", strerror(-r)); | |
93 | goto fail; | |
94 | } | |
95 | ||
96 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
97 | if (r < 0) { | |
98 | log_error("Failed to allocate return: %s", strerror(-r)); | |
99 | goto fail; | |
100 | } | |
101 | ||
102 | lowercase = strdup(hello); | |
103 | if (!lowercase) { | |
104 | r = log_oom(); | |
105 | goto fail; | |
106 | } | |
107 | ||
108 | ascii_strlower(lowercase); | |
109 | ||
110 | r = sd_bus_message_append(reply, "s", lowercase); | |
111 | if (r < 0) { | |
112 | log_error("Failed to append message: %s", strerror(-r)); | |
113 | goto fail; | |
114 | } | |
115 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Exit")) | |
116 | break; | |
117 | else if (sd_bus_message_is_method_call(m, NULL, NULL)) { | |
118 | const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownMethod", "Unknown method."); | |
119 | ||
120 | r = sd_bus_message_new_method_error(bus, m, &e, &reply); | |
121 | if (r < 0) { | |
122 | log_error("Failed to allocate return: %s", strerror(-r)); | |
123 | goto fail; | |
124 | } | |
125 | } | |
126 | ||
127 | if (reply) { | |
128 | r = sd_bus_send(bus, reply, NULL); | |
129 | if (r < 0) { | |
130 | log_error("Failed to send reply: %s", strerror(-r)); | |
131 | goto fail; | |
132 | } | |
133 | } | |
134 | } | |
135 | ||
136 | r = 0; | |
137 | ||
138 | fail: | |
139 | if (bus) | |
140 | sd_bus_unref(bus); | |
141 | ||
142 | return INT_TO_PTR(r); | |
143 | } | |
144 | ||
145 | static int client(void) { | |
146 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; | |
147 | sd_bus *bus = NULL; | |
148 | sd_bus_error error = SD_BUS_ERROR_INIT; | |
149 | const char *hello; | |
150 | int r; | |
151 | ||
152 | r = sd_bus_open_user(&bus); | |
153 | if (r < 0) { | |
154 | log_error("Failed to connect to user bus: %s", strerror(-r)); | |
155 | goto finish; | |
156 | } | |
157 | ||
158 | r = sd_bus_message_new_method_call( | |
159 | bus, | |
160 | "org.freedesktop.systemd.test", | |
161 | "/", | |
162 | "org.freedesktop.systemd.test", | |
163 | "LowerCase", | |
164 | &m); | |
165 | if (r < 0) { | |
166 | log_error("Failed to allocate method call: %s", strerror(-r)); | |
167 | goto finish; | |
168 | } | |
169 | ||
170 | r = sd_bus_message_append(m, "s", "HELLO"); | |
171 | if (r < 0) { | |
172 | log_error("Failed to append string: %s", strerror(-r)); | |
173 | goto finish; | |
174 | } | |
175 | ||
176 | r = sd_bus_send_with_reply_and_block(bus, m, (uint64_t) -1, &error, &reply); | |
177 | if (r < 0) { | |
178 | log_error("Failed to issue method call: %s", error.message); | |
179 | goto finish; | |
180 | } | |
181 | ||
182 | r = sd_bus_message_read(reply, "s", &hello); | |
183 | if (r < 0) { | |
184 | log_error("Failed to get string: %s", strerror(-r)); | |
185 | goto finish; | |
186 | } | |
187 | ||
188 | assert(streq(hello, "hello")); | |
189 | ||
190 | r = 0; | |
191 | ||
192 | finish: | |
193 | if (bus) { | |
194 | _cleanup_bus_message_unref_ sd_bus_message *q; | |
195 | ||
196 | r = sd_bus_message_new_method_call( | |
197 | bus, | |
198 | "org.freedesktop.systemd.test", | |
199 | "/", | |
200 | "org.freedesktop.systemd.test", | |
201 | "Exit", | |
202 | &q); | |
203 | if (r < 0) { | |
204 | log_error("Failed to allocate method call: %s", strerror(-r)); | |
205 | goto finish; | |
206 | } | |
207 | ||
208 | sd_bus_send(bus, q, NULL); | |
209 | sd_bus_flush(bus); | |
210 | sd_bus_unref(bus); | |
211 | } | |
212 | ||
213 | sd_bus_error_free(&error); | |
214 | return r; | |
215 | } | |
216 | ||
217 | int main(int argc, char *argv[]) { | |
218 | pthread_t t; | |
219 | sd_bus *bus; | |
220 | void *p; | |
221 | int q, r; | |
222 | ||
223 | r = server_init(&bus); | |
224 | if (r < 0) | |
225 | return EXIT_FAILURE; | |
226 | ||
227 | r = pthread_create(&t, NULL, server, bus); | |
228 | if (r != 0) { | |
229 | sd_bus_unref(bus); | |
230 | return EXIT_FAILURE; | |
231 | } | |
232 | ||
233 | r = client(); | |
234 | ||
235 | q = pthread_join(t, &p); | |
236 | if (q != 0) | |
237 | return EXIT_FAILURE; | |
238 | if (r < 0) | |
239 | return EXIT_FAILURE; | |
240 | ||
241 | return EXIT_SUCCESS; | |
242 | } |