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