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fd38203a LP |
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 "sd-event.h" | |
23 | #include "log.h" | |
24 | #include "util.h" | |
0c0cdb06 | 25 | #include "macro.h" |
fd38203a LP |
26 | |
27 | static int prepare_handler(sd_event_source *s, void *userdata) { | |
28 | log_info("preparing %c", PTR_TO_INT(userdata)); | |
29 | return 1; | |
30 | } | |
31 | ||
12179984 | 32 | static bool got_a, got_b, got_c, got_unref; |
9ec9694c | 33 | static unsigned got_d; |
fd38203a | 34 | |
12179984 LP |
35 | static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
36 | sd_event_source_unref(s); | |
37 | got_unref = true; | |
38 | return 0; | |
39 | } | |
40 | ||
fd38203a LP |
41 | static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
42 | ||
43 | log_info("got IO on %c", PTR_TO_INT(userdata)); | |
44 | ||
45 | if (userdata == INT_TO_PTR('a')) { | |
baf76283 | 46 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); |
fd38203a LP |
47 | assert_se(!got_a); |
48 | got_a = true; | |
49 | } else if (userdata == INT_TO_PTR('b')) { | |
50 | assert_se(!got_b); | |
51 | got_b = true; | |
9ec9694c DS |
52 | } else if (userdata == INT_TO_PTR('d')) { |
53 | got_d++; | |
54 | if (got_d < 2) | |
55 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0); | |
56 | else | |
57 | assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); | |
fd38203a LP |
58 | } else |
59 | assert_not_reached("Yuck!"); | |
60 | ||
61 | return 1; | |
62 | } | |
63 | ||
64 | static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
65 | ||
0c0cdb06 RC |
66 | assert_se(s); |
67 | assert_se(si); | |
fd38203a LP |
68 | |
69 | log_info("got child on %c", PTR_TO_INT(userdata)); | |
70 | ||
0c0cdb06 | 71 | assert_se(userdata == INT_TO_PTR('f')); |
fd38203a | 72 | |
6203e07a | 73 | assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0); |
fd38203a LP |
74 | sd_event_source_unref(s); |
75 | ||
76 | return 1; | |
77 | } | |
78 | ||
79 | static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { | |
39883f62 | 80 | sd_event_source *p = NULL; |
fd38203a LP |
81 | sigset_t ss; |
82 | pid_t pid; | |
83 | ||
0c0cdb06 RC |
84 | assert_se(s); |
85 | assert_se(si); | |
fd38203a LP |
86 | |
87 | log_info("got signal on %c", PTR_TO_INT(userdata)); | |
88 | ||
0c0cdb06 | 89 | assert_se(userdata == INT_TO_PTR('e')); |
fd38203a LP |
90 | |
91 | assert_se(sigemptyset(&ss) >= 0); | |
92 | assert_se(sigaddset(&ss, SIGCHLD) >= 0); | |
93 | assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0); | |
94 | ||
95 | pid = fork(); | |
96 | assert_se(pid >= 0); | |
97 | ||
98 | if (pid == 0) | |
99 | _exit(0); | |
100 | ||
151b9b96 | 101 | assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0); |
baf76283 | 102 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
103 | |
104 | sd_event_source_unref(s); | |
105 | ||
106 | return 1; | |
107 | } | |
108 | ||
109 | static int defer_handler(sd_event_source *s, void *userdata) { | |
39883f62 | 110 | sd_event_source *p = NULL; |
fd38203a LP |
111 | sigset_t ss; |
112 | ||
0c0cdb06 | 113 | assert_se(s); |
fd38203a LP |
114 | |
115 | log_info("got defer on %c", PTR_TO_INT(userdata)); | |
116 | ||
0c0cdb06 | 117 | assert_se(userdata == INT_TO_PTR('d')); |
fd38203a LP |
118 | |
119 | assert_se(sigemptyset(&ss) >= 0); | |
120 | assert_se(sigaddset(&ss, SIGUSR1) >= 0); | |
121 | assert_se(sigprocmask(SIG_BLOCK, &ss, NULL) >= 0); | |
151b9b96 | 122 | assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0); |
baf76283 | 123 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
124 | raise(SIGUSR1); |
125 | ||
126 | sd_event_source_unref(s); | |
127 | ||
128 | return 1; | |
129 | } | |
130 | ||
131 | static bool do_quit = false; | |
132 | ||
133 | static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
134 | log_info("got timer on %c", PTR_TO_INT(userdata)); | |
135 | ||
136 | if (userdata == INT_TO_PTR('c')) { | |
137 | ||
138 | if (do_quit) { | |
139 | sd_event_source *p; | |
140 | ||
151b9b96 | 141 | assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0); |
baf76283 | 142 | assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); |
fd38203a | 143 | } else { |
0c0cdb06 | 144 | assert_se(!got_c); |
fd38203a LP |
145 | got_c = true; |
146 | } | |
147 | } else | |
148 | assert_not_reached("Huh?"); | |
149 | ||
150 | return 2; | |
151 | } | |
152 | ||
6203e07a | 153 | static bool got_exit = false; |
da7e457c | 154 | |
6203e07a | 155 | static int exit_handler(sd_event_source *s, void *userdata) { |
da7e457c LP |
156 | log_info("got quit handler on %c", PTR_TO_INT(userdata)); |
157 | ||
6203e07a | 158 | got_exit = true; |
da7e457c LP |
159 | |
160 | return 3; | |
161 | } | |
162 | ||
fd38203a LP |
163 | int main(int argc, char *argv[]) { |
164 | sd_event *e = NULL; | |
12179984 | 165 | sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL; |
fd38203a | 166 | static const char ch = 'x'; |
12179984 | 167 | int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 }; |
fd38203a LP |
168 | |
169 | assert_se(pipe(a) >= 0); | |
170 | assert_se(pipe(b) >= 0); | |
9ec9694c | 171 | assert_se(pipe(d) >= 0); |
12179984 | 172 | assert_se(pipe(k) >= 0); |
fd38203a | 173 | |
afc6adb5 | 174 | assert_se(sd_event_default(&e) >= 0); |
fd38203a | 175 | |
cde93897 LP |
176 | assert_se(sd_event_set_watchdog(e, true) >= 0); |
177 | ||
12179984 LP |
178 | /* Test whether we cleanly can destroy an io event source from its own handler */ |
179 | got_unref = false; | |
151b9b96 | 180 | assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0); |
12179984 LP |
181 | assert_se(write(k[1], &ch, 1) == 1); |
182 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
183 | assert_se(got_unref); | |
184 | ||
9ec9694c DS |
185 | got_a = false, got_b = false, got_c = false, got_d = 0; |
186 | ||
187 | /* Add a oneshot handler, trigger it, re-enable it, and trigger | |
188 | * it again. */ | |
151b9b96 | 189 | assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0); |
9ec9694c DS |
190 | assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0); |
191 | assert_se(write(d[1], &ch, 1) >= 0); | |
192 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
193 | assert_se(got_d == 1); | |
194 | assert_se(write(d[1], &ch, 1) >= 0); | |
195 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
196 | assert_se(got_d == 2); | |
fd38203a | 197 | |
151b9b96 LP |
198 | assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0); |
199 | assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0); | |
6a0f1f6d | 200 | assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0); |
151b9b96 | 201 | assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0); |
fd38203a LP |
202 | |
203 | assert_se(sd_event_source_set_priority(x, 99) >= 0); | |
baf76283 | 204 | assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
205 | assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0); |
206 | assert_se(sd_event_source_set_priority(z, 50) >= 0); | |
baf76283 | 207 | assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); |
fd38203a | 208 | assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0); |
a71fe8b8 LP |
209 | |
210 | /* Test for floating event sources */ | |
211 | assert_se(sigprocmask_many(SIG_BLOCK, SIGRTMIN+1, -1) == 0); | |
212 | assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0); | |
fd38203a LP |
213 | |
214 | assert_se(write(a[1], &ch, 1) >= 0); | |
215 | assert_se(write(b[1], &ch, 1) >= 0); | |
216 | ||
217 | assert_se(!got_a && !got_b && !got_c); | |
218 | ||
219 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
220 | ||
221 | assert_se(!got_a && got_b && !got_c); | |
222 | ||
223 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
224 | ||
225 | assert_se(!got_a && got_b && got_c); | |
226 | ||
227 | assert_se(sd_event_run(e, (uint64_t) -1) >= 1); | |
228 | ||
229 | assert_se(got_a && got_b && got_c); | |
230 | ||
231 | sd_event_source_unref(x); | |
232 | sd_event_source_unref(y); | |
233 | ||
234 | do_quit = true; | |
235 | assert_se(sd_event_source_set_time(z, now(CLOCK_MONOTONIC) + 200 * USEC_PER_MSEC) >= 0); | |
baf76283 | 236 | assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); |
fd38203a LP |
237 | |
238 | assert_se(sd_event_loop(e) >= 0); | |
239 | ||
240 | sd_event_source_unref(z); | |
da7e457c | 241 | sd_event_source_unref(q); |
fd38203a | 242 | |
d5e4ec5b LP |
243 | sd_event_source_unref(w); |
244 | ||
fd38203a LP |
245 | sd_event_unref(e); |
246 | ||
3d94f76c LP |
247 | safe_close_pair(a); |
248 | safe_close_pair(b); | |
249 | safe_close_pair(d); | |
250 | safe_close_pair(k); | |
fd38203a LP |
251 | |
252 | return 0; | |
253 | } |