1 /* $OpenBSD: control.c,v 1.8 2021/03/02 04:10:07 jsg Exp $ */
4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include <sys/socket.h>
25 #include <netinet/in.h>
40 #define CONTROL_BACKLOG 5
48 } control_state = {.fd = -1, .tx = -1};
51 TAILQ_ENTRY(ctl_conn) entry;
52 int monitor; /* 1 if client is in monitor mode */
56 TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
58 struct ctl_conn *control_connbyfd(int);
59 struct ctl_conn *control_connbypid(pid_t);
60 void control_close(int);
63 control_init(char *path)
65 struct sockaddr_un sun;
69 if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
71 log_warn("%s: socket", __func__);
75 memset(&sun, 0, sizeof(sun));
76 sun.sun_family = AF_UNIX;
77 strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
79 if (unlink(path) == -1)
80 if (errno != ENOENT) {
81 log_warn("%s: unlink %s", __func__, path);
86 old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
87 if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
88 log_warn("%s: bind: %s", __func__, path);
95 if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
96 log_warn("%s: chmod", __func__);
106 control_listen(int fd)
108 if (control_state.fd != -1)
109 fatalx("%s: received unexpected controlsock", __func__);
111 control_state.fd = fd;
112 if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
113 log_warn("%s: listen", __func__);
117 event_set(&control_state.ev, control_state.fd, EV_READ,
118 control_accept, NULL);
119 event_add(&control_state.ev, NULL);
120 evtimer_set(&control_state.evt, control_accept, NULL);
126 control_accept(int listenfd, short event, void *bula)
130 struct sockaddr_un sun;
133 event_add(&control_state.ev, NULL);
134 if ((event & EV_TIMEOUT))
138 if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
139 SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
141 * Pause accept if we are out of file descriptors, or
142 * libevent will haunt us here too.
144 if (errno == ENFILE || errno == EMFILE) {
145 struct timeval evtpause = { 1, 0 };
147 event_del(&control_state.ev);
148 evtimer_add(&control_state.evt, &evtpause);
149 } else if (errno != EWOULDBLOCK && errno != EINTR &&
150 errno != ECONNABORTED)
151 log_warn("%s: accept4", __func__);
155 if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
156 log_warn("%s: calloc", __func__);
161 imsg_init(&c->iev.ibuf, connfd);
162 c->iev.handler = control_dispatch_imsg;
163 c->iev.events = EV_READ;
164 event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
165 c->iev.handler, &c->iev);
166 event_add(&c->iev.ev, NULL);
168 TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
172 control_connbyfd(int fd)
176 TAILQ_FOREACH(c, &ctl_conns, entry) {
177 if (c->iev.ibuf.fd == fd)
185 control_connbypid(pid_t pid)
189 TAILQ_FOREACH(c, &ctl_conns, entry) {
190 if (c->iev.ibuf.pid == pid)
198 control_close(int fd)
202 if ((c = control_connbyfd(fd)) == NULL) {
203 log_warnx("%s: fd %d: not found", __func__, fd);
207 /* abort the transaction if running by this user */
208 if (control_state.tx != -1 && c->iev.ibuf.fd == control_state.tx) {
209 playlist_free(&control_state.play);
210 control_state.tx = -1;
213 msgbuf_clear(&c->iev.ibuf.w);
214 TAILQ_REMOVE(&ctl_conns, c, entry);
216 event_del(&c->iev.ev);
217 close(c->iev.ibuf.fd);
219 /* Some file descriptors are available again. */
220 if (evtimer_pending(&control_state.evt, NULL)) {
221 evtimer_del(&control_state.evt);
222 event_add(&control_state.ev, NULL);
229 control_notify(struct imsgev *iev, int type)
233 TAILQ_FOREACH(c, &ctl_conns, entry) {
234 if (&c->iev == iev || !c->monitor)
237 imsg_compose_event(&c->iev, IMSG_CTL_MONITOR, 0, 0,
238 -1, &type, sizeof(type));
243 control_dispatch_imsg(int fd, short event, void *bula)
247 struct player_repeat rp;
250 if ((c = control_connbyfd(fd)) == NULL) {
251 log_warnx("%s: fd %d: not found", __func__, fd);
255 if (event & EV_READ) {
256 if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
262 if (event & EV_WRITE) {
263 if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
270 if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
277 switch (imsg.hdr.type) {
279 switch (play_state) {
281 main_playlist_resume();
287 play_state = STATE_PLAYING;
288 main_send_player(IMSG_RESUME, -1, NULL ,0);
291 control_notify(&c->iev, imsg.hdr.type);
293 case IMSG_CTL_TOGGLE_PLAY:
294 switch (play_state) {
296 main_playlist_resume();
299 play_state = STATE_PAUSED;
300 main_send_player(IMSG_PAUSE, -1, NULL, 0);
303 play_state = STATE_PLAYING;
304 main_send_player(IMSG_RESUME, -1, NULL, 0);
307 control_notify(&c->iev, imsg.hdr.type);
310 if (play_state != STATE_PLAYING)
312 play_state = STATE_PAUSED;
313 main_send_player(IMSG_PAUSE, -1, NULL, 0);
314 control_notify(&c->iev, imsg.hdr.type);
317 if (play_state == STATE_STOPPED)
319 play_state = STATE_STOPPED;
320 main_send_player(IMSG_STOP, -1, NULL, 0);
321 control_notify(&c->iev, imsg.hdr.type);
323 case IMSG_CTL_RESTART:
324 main_send_player(IMSG_STOP, -1, NULL, 0);
325 main_restart_track();
326 control_notify(&c->iev, imsg.hdr.type);
330 control_notify(&c->iev, imsg.hdr.type);
333 main_send_playlist(&c->iev);
335 case IMSG_CTL_STATUS:
336 main_send_status(&c->iev);
339 main_send_player(IMSG_STOP, -1, NULL, 0);
340 main_playlist_advance();
341 control_notify(&c->iev, imsg.hdr.type);
344 main_send_player(IMSG_STOP, -1, NULL, 0);
345 main_playlist_previous();
346 control_notify(&c->iev, imsg.hdr.type);
349 main_playlist_jump(&c->iev, &imsg);
350 control_notify(&c->iev, imsg.hdr.type);
352 case IMSG_CTL_REPEAT:
353 if (IMSG_DATA_SIZE(imsg) != sizeof(rp)) {
354 log_warnx("%s: got wrong size", __func__);
357 memcpy(&rp, imsg.data, sizeof(rp));
358 if (rp.repeat_all != -1)
359 repeat_all = rp.repeat_all;
360 if (rp.repeat_one != -1)
361 repeat_one = rp.repeat_one;
362 control_notify(&c->iev, imsg.hdr.type);
365 if (control_state.tx != -1) {
366 main_senderr(&c->iev, "locked");
369 control_state.tx = c->iev.ibuf.fd;
370 imsg_compose_event(&c->iev, IMSG_CTL_BEGIN, 0, 0, -1,
374 if (control_state.tx != -1 &&
375 control_state.tx != c->iev.ibuf.fd) {
376 main_senderr(&c->iev, "locked");
379 main_enqueue(control_state.tx != -1,
380 &control_state.play,&c->iev, &imsg);
381 if (control_state.tx == -1)
382 control_notify(&c->iev, imsg.hdr.type);
384 case IMSG_CTL_COMMIT:
385 if (control_state.tx != c->iev.ibuf.fd) {
386 main_senderr(&c->iev, "locked");
389 if (IMSG_DATA_SIZE(imsg) != sizeof(off)) {
390 main_senderr(&c->iev, "wrong size");
393 memcpy(&off, imsg.data, sizeof(off));
394 playlist_swap(&control_state.play, off);
395 memset(&control_state.play, 0,
396 sizeof(control_state.play));
397 control_state.tx = -1;
398 imsg_compose_event(&c->iev, IMSG_CTL_COMMIT, 0, 0, -1,
400 control_notify(&c->iev, imsg.hdr.type);
402 case IMSG_CTL_MONITOR:
406 if (IMSG_DATA_SIZE(imsg) !=
407 sizeof(struct player_seek)) {
408 main_senderr(&c->iev, "wrong size");
411 switch (play_state) {
413 main_playlist_resume();
418 play_state = STATE_PLAYING;
421 main_send_player(IMSG_CTL_SEEK, -1, imsg.data,
422 IMSG_DATA_SIZE(imsg));
423 control_notify(&c->iev, imsg.hdr.type);
426 log_debug("%s: error handling imsg %d", __func__,
433 imsg_event_add(&c->iev);
437 control_imsg_relay(struct imsg *imsg)
441 if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
444 return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
445 -1, imsg->data, IMSG_DATA_SIZE(*imsg)));