1 3baa2617 2022-02-16 op /* $OpenBSD: control.c,v 1.8 2021/03/02 04:10:07 jsg Exp $ */
4 3baa2617 2022-02-16 op * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
6 3baa2617 2022-02-16 op * Permission to use, copy, modify, and distribute this software for any
7 3baa2617 2022-02-16 op * purpose with or without fee is hereby granted, provided that the above
8 3baa2617 2022-02-16 op * copyright notice and this permission notice appear in all copies.
10 3baa2617 2022-02-16 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 3baa2617 2022-02-16 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 3baa2617 2022-02-16 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 3baa2617 2022-02-16 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 3baa2617 2022-02-16 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 3baa2617 2022-02-16 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 3baa2617 2022-02-16 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 f36fd90a 2022-07-09 op #include "config.h"
21 3baa2617 2022-02-16 op #include <sys/stat.h>
22 3baa2617 2022-02-16 op #include <sys/socket.h>
23 3baa2617 2022-02-16 op #include <sys/un.h>
25 3baa2617 2022-02-16 op #include <netinet/in.h>
26 3baa2617 2022-02-16 op #include <net/if.h>
28 3baa2617 2022-02-16 op #include <errno.h>
29 bb3f279f 2022-02-16 op #include <limits.h>
30 14be015f 2022-02-17 op #include <stdio.h>
31 3baa2617 2022-02-16 op #include <stdlib.h>
32 3baa2617 2022-02-16 op #include <string.h>
33 3baa2617 2022-02-16 op #include <unistd.h>
35 3baa2617 2022-02-16 op #include "amused.h"
36 3baa2617 2022-02-16 op #include "log.h"
37 3baa2617 2022-02-16 op #include "control.h"
38 3baa2617 2022-02-16 op #include "playlist.h"
40 3baa2617 2022-02-16 op #define CONTROL_BACKLOG 5
43 3baa2617 2022-02-16 op struct event ev;
44 3baa2617 2022-02-16 op struct event evt;
46 19d6b480 2022-02-17 op struct playlist play;
48 19d6b480 2022-02-17 op } control_state = {.fd = -1, .tx = -1};
50 3baa2617 2022-02-16 op struct ctl_conn {
51 3baa2617 2022-02-16 op TAILQ_ENTRY(ctl_conn) entry;
52 87f575c3 2022-02-21 op int monitor; /* 1 if client is in monitor mode */
53 3baa2617 2022-02-16 op struct imsgev iev;
56 3baa2617 2022-02-16 op TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
58 3baa2617 2022-02-16 op struct ctl_conn *control_connbyfd(int);
59 3baa2617 2022-02-16 op struct ctl_conn *control_connbypid(pid_t);
60 3baa2617 2022-02-16 op void control_close(int);
63 3baa2617 2022-02-16 op control_init(char *path)
65 3baa2617 2022-02-16 op struct sockaddr_un sun;
67 3baa2617 2022-02-16 op mode_t old_umask;
69 3baa2617 2022-02-16 op if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
71 3baa2617 2022-02-16 op log_warn("%s: socket", __func__);
75 3baa2617 2022-02-16 op memset(&sun, 0, sizeof(sun));
76 3baa2617 2022-02-16 op sun.sun_family = AF_UNIX;
77 3baa2617 2022-02-16 op strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
79 3baa2617 2022-02-16 op if (unlink(path) == -1)
80 3baa2617 2022-02-16 op if (errno != ENOENT) {
81 3baa2617 2022-02-16 op log_warn("%s: unlink %s", __func__, path);
86 3baa2617 2022-02-16 op old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
87 3baa2617 2022-02-16 op if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
88 3baa2617 2022-02-16 op log_warn("%s: bind: %s", __func__, path);
90 3baa2617 2022-02-16 op umask(old_umask);
93 3baa2617 2022-02-16 op umask(old_umask);
95 3baa2617 2022-02-16 op if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
96 3baa2617 2022-02-16 op log_warn("%s: chmod", __func__);
98 3baa2617 2022-02-16 op (void)unlink(path);
106 3baa2617 2022-02-16 op control_listen(int fd)
108 3baa2617 2022-02-16 op if (control_state.fd != -1)
109 3baa2617 2022-02-16 op fatalx("%s: received unexpected controlsock", __func__);
111 3baa2617 2022-02-16 op control_state.fd = fd;
112 3baa2617 2022-02-16 op if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
113 3baa2617 2022-02-16 op log_warn("%s: listen", __func__);
117 3baa2617 2022-02-16 op event_set(&control_state.ev, control_state.fd, EV_READ,
118 3baa2617 2022-02-16 op control_accept, NULL);
119 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
120 3baa2617 2022-02-16 op evtimer_set(&control_state.evt, control_accept, NULL);
126 3baa2617 2022-02-16 op control_accept(int listenfd, short event, void *bula)
129 3baa2617 2022-02-16 op socklen_t len;
130 3baa2617 2022-02-16 op struct sockaddr_un sun;
131 3baa2617 2022-02-16 op struct ctl_conn *c;
133 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
134 3baa2617 2022-02-16 op if ((event & EV_TIMEOUT))
137 3baa2617 2022-02-16 op len = sizeof(sun);
138 3baa2617 2022-02-16 op if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
139 3baa2617 2022-02-16 op SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
141 3baa2617 2022-02-16 op * Pause accept if we are out of file descriptors, or
142 3baa2617 2022-02-16 op * libevent will haunt us here too.
144 3baa2617 2022-02-16 op if (errno == ENFILE || errno == EMFILE) {
145 3baa2617 2022-02-16 op struct timeval evtpause = { 1, 0 };
147 3baa2617 2022-02-16 op event_del(&control_state.ev);
148 3baa2617 2022-02-16 op evtimer_add(&control_state.evt, &evtpause);
149 3baa2617 2022-02-16 op } else if (errno != EWOULDBLOCK && errno != EINTR &&
150 3baa2617 2022-02-16 op errno != ECONNABORTED)
151 3baa2617 2022-02-16 op log_warn("%s: accept4", __func__);
155 3baa2617 2022-02-16 op if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
156 3baa2617 2022-02-16 op log_warn("%s: calloc", __func__);
157 3baa2617 2022-02-16 op close(connfd);
161 3baa2617 2022-02-16 op imsg_init(&c->iev.ibuf, connfd);
162 3baa2617 2022-02-16 op c->iev.handler = control_dispatch_imsg;
163 3baa2617 2022-02-16 op c->iev.events = EV_READ;
164 3baa2617 2022-02-16 op event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
165 3baa2617 2022-02-16 op c->iev.handler, &c->iev);
166 3baa2617 2022-02-16 op event_add(&c->iev.ev, NULL);
168 3baa2617 2022-02-16 op TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
171 3baa2617 2022-02-16 op struct ctl_conn *
172 3baa2617 2022-02-16 op control_connbyfd(int fd)
174 3baa2617 2022-02-16 op struct ctl_conn *c;
176 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
177 3baa2617 2022-02-16 op if (c->iev.ibuf.fd == fd)
184 3baa2617 2022-02-16 op struct ctl_conn *
185 3baa2617 2022-02-16 op control_connbypid(pid_t pid)
187 3baa2617 2022-02-16 op struct ctl_conn *c;
189 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
190 3baa2617 2022-02-16 op if (c->iev.ibuf.pid == pid)
198 3baa2617 2022-02-16 op control_close(int fd)
200 3baa2617 2022-02-16 op struct ctl_conn *c;
202 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
203 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
207 19d6b480 2022-02-17 op /* abort the transaction if running by this user */
208 c6304ab9 2022-02-17 op if (control_state.tx != -1 && c->iev.ibuf.fd == control_state.tx) {
209 19d6b480 2022-02-17 op playlist_free(&control_state.play);
210 19d6b480 2022-02-17 op control_state.tx = -1;
213 3baa2617 2022-02-16 op msgbuf_clear(&c->iev.ibuf.w);
214 3baa2617 2022-02-16 op TAILQ_REMOVE(&ctl_conns, c, entry);
216 3baa2617 2022-02-16 op event_del(&c->iev.ev);
217 3baa2617 2022-02-16 op close(c->iev.ibuf.fd);
219 3baa2617 2022-02-16 op /* Some file descriptors are available again. */
220 3baa2617 2022-02-16 op if (evtimer_pending(&control_state.evt, NULL)) {
221 3baa2617 2022-02-16 op evtimer_del(&control_state.evt);
222 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
229 87f575c3 2022-02-21 op control_notify(struct imsgev *iev, int type)
231 87f575c3 2022-02-21 op struct ctl_conn *c;
233 87f575c3 2022-02-21 op TAILQ_FOREACH(c, &ctl_conns, entry) {
234 87f575c3 2022-02-21 op if (&c->iev == iev || !c->monitor)
237 87f575c3 2022-02-21 op imsg_compose_event(&c->iev, IMSG_CTL_MONITOR, 0, 0,
238 87f575c3 2022-02-21 op -1, &type, sizeof(type));
243 3baa2617 2022-02-16 op control_dispatch_imsg(int fd, short event, void *bula)
245 310ef57c 2022-02-19 op struct ctl_conn *c;
246 310ef57c 2022-02-19 op struct imsg imsg;
247 310ef57c 2022-02-19 op struct player_repeat rp;
248 3af93963 2022-03-02 op ssize_t n, off;
250 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
251 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
255 3baa2617 2022-02-16 op if (event & EV_READ) {
256 3baa2617 2022-02-16 op if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
258 3baa2617 2022-02-16 op control_close(fd);
262 3baa2617 2022-02-16 op if (event & EV_WRITE) {
263 3baa2617 2022-02-16 op if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
264 3baa2617 2022-02-16 op control_close(fd);
270 3baa2617 2022-02-16 op if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
271 3baa2617 2022-02-16 op control_close(fd);
277 3baa2617 2022-02-16 op switch (imsg.hdr.type) {
278 3baa2617 2022-02-16 op case IMSG_CTL_PLAY:
279 3baa2617 2022-02-16 op switch (play_state) {
280 3baa2617 2022-02-16 op case STATE_STOPPED:
281 2f589330 2022-02-17 op main_playlist_resume();
283 3baa2617 2022-02-16 op case STATE_PLAYING:
284 3baa2617 2022-02-16 op /* do nothing */
286 3baa2617 2022-02-16 op case STATE_PAUSED:
287 950ad05c 2022-02-16 op play_state = STATE_PLAYING;
288 791d3db3 2022-07-09 op main_send_player(IMSG_RESUME, -1, NULL ,0);
291 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
293 3baa2617 2022-02-16 op case IMSG_CTL_TOGGLE_PLAY:
294 3baa2617 2022-02-16 op switch (play_state) {
295 3baa2617 2022-02-16 op case STATE_STOPPED:
296 2f589330 2022-02-17 op main_playlist_resume();
298 3baa2617 2022-02-16 op case STATE_PLAYING:
299 2ac7eafd 2022-02-16 op play_state = STATE_PAUSED;
300 791d3db3 2022-07-09 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
302 3baa2617 2022-02-16 op case STATE_PAUSED:
303 2ac7eafd 2022-02-16 op play_state = STATE_PLAYING;
304 791d3db3 2022-07-09 op main_send_player(IMSG_RESUME, -1, NULL, 0);
307 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
309 3baa2617 2022-02-16 op case IMSG_CTL_PAUSE:
310 3baa2617 2022-02-16 op if (play_state != STATE_PLAYING)
312 950ad05c 2022-02-16 op play_state = STATE_PAUSED;
313 791d3db3 2022-07-09 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
314 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
316 3baa2617 2022-02-16 op case IMSG_CTL_STOP:
317 3baa2617 2022-02-16 op if (play_state == STATE_STOPPED)
319 bfaa7897 2022-02-17 op play_state = STATE_STOPPED;
320 791d3db3 2022-07-09 op main_send_player(IMSG_STOP, -1, NULL, 0);
321 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
323 3baa2617 2022-02-16 op case IMSG_CTL_RESTART:
324 791d3db3 2022-07-09 op main_send_player(IMSG_STOP, -1, NULL, 0);
325 aaccc123 2022-02-16 op main_restart_track();
326 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
328 3baa2617 2022-02-16 op case IMSG_CTL_FLUSH:
329 3baa2617 2022-02-16 op playlist_truncate();
330 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
332 3baa2617 2022-02-16 op case IMSG_CTL_SHOW:
333 d980494c 2022-02-16 op main_send_playlist(&c->iev);
335 bb3f279f 2022-02-16 op case IMSG_CTL_STATUS:
336 bb3f279f 2022-02-16 op main_send_status(&c->iev);
338 af27e631 2022-02-17 op case IMSG_CTL_NEXT:
339 791d3db3 2022-07-09 op main_send_player(IMSG_STOP, -1, NULL, 0);
340 af27e631 2022-02-17 op main_playlist_advance();
341 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
343 af27e631 2022-02-17 op case IMSG_CTL_PREV:
344 791d3db3 2022-07-09 op main_send_player(IMSG_STOP, -1, NULL, 0);
345 af27e631 2022-02-17 op main_playlist_previous();
346 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
348 a913de21 2022-02-17 op case IMSG_CTL_JUMP:
349 a913de21 2022-02-17 op main_playlist_jump(&c->iev, &imsg);
350 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
352 310ef57c 2022-02-19 op case IMSG_CTL_REPEAT:
353 310ef57c 2022-02-19 op if (IMSG_DATA_SIZE(imsg) != sizeof(rp)) {
354 310ef57c 2022-02-19 op log_warnx("%s: got wrong size", __func__);
357 310ef57c 2022-02-19 op memcpy(&rp, imsg.data, sizeof(rp));
358 310ef57c 2022-02-19 op if (rp.repeat_all != -1)
359 310ef57c 2022-02-19 op repeat_all = rp.repeat_all;
360 310ef57c 2022-02-19 op if (rp.repeat_one != -1)
361 310ef57c 2022-02-19 op repeat_one = rp.repeat_one;
362 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
364 19d6b480 2022-02-17 op case IMSG_CTL_BEGIN:
365 19d6b480 2022-02-17 op if (control_state.tx != -1) {
366 19d6b480 2022-02-17 op main_senderr(&c->iev, "locked");
369 c6304ab9 2022-02-17 op control_state.tx = c->iev.ibuf.fd;
370 19d6b480 2022-02-17 op imsg_compose_event(&c->iev, IMSG_CTL_BEGIN, 0, 0, -1,
373 19d6b480 2022-02-17 op case IMSG_CTL_ADD:
374 19d6b480 2022-02-17 op if (control_state.tx != -1 &&
375 c6304ab9 2022-02-17 op control_state.tx != c->iev.ibuf.fd) {
376 19d6b480 2022-02-17 op main_senderr(&c->iev, "locked");
379 19d6b480 2022-02-17 op main_enqueue(control_state.tx != -1,
380 19d6b480 2022-02-17 op &control_state.play,&c->iev, &imsg);
381 87f575c3 2022-02-21 op if (control_state.tx == -1)
382 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
384 19d6b480 2022-02-17 op case IMSG_CTL_COMMIT:
385 c6304ab9 2022-02-17 op if (control_state.tx != c->iev.ibuf.fd) {
386 19d6b480 2022-02-17 op main_senderr(&c->iev, "locked");
389 3af93963 2022-03-02 op if (IMSG_DATA_SIZE(imsg) != sizeof(off)) {
390 3af93963 2022-03-02 op main_senderr(&c->iev, "wrong size");
393 3af93963 2022-03-02 op memcpy(&off, imsg.data, sizeof(off));
394 3af93963 2022-03-02 op playlist_swap(&control_state.play, off);
395 19d6b480 2022-02-17 op memset(&control_state.play, 0,
396 19d6b480 2022-02-17 op sizeof(control_state.play));
397 19d6b480 2022-02-17 op control_state.tx = -1;
398 19d6b480 2022-02-17 op imsg_compose_event(&c->iev, IMSG_CTL_COMMIT, 0, 0, -1,
400 87f575c3 2022-02-21 op control_notify(&c->iev, imsg.hdr.type);
402 87f575c3 2022-02-21 op case IMSG_CTL_MONITOR:
403 87f575c3 2022-02-21 op c->monitor = 1;
405 791d3db3 2022-07-09 op case IMSG_CTL_SEEK:
406 791d3db3 2022-07-09 op if (IMSG_DATA_SIZE(imsg) !=
407 791d3db3 2022-07-09 op sizeof(struct player_seek)) {
408 791d3db3 2022-07-09 op main_senderr(&c->iev, "wrong size");
411 3ad8bae8 2022-07-09 op switch (play_state) {
412 3ad8bae8 2022-07-09 op case STATE_STOPPED:
413 3ad8bae8 2022-07-09 op main_playlist_resume();
415 3ad8bae8 2022-07-09 op case STATE_PLAYING:
417 3ad8bae8 2022-07-09 op case STATE_PAUSED:
418 3ad8bae8 2022-07-09 op play_state = STATE_PLAYING;
421 791d3db3 2022-07-09 op main_send_player(IMSG_CTL_SEEK, -1, imsg.data,
422 791d3db3 2022-07-09 op IMSG_DATA_SIZE(imsg));
423 791d3db3 2022-07-09 op control_notify(&c->iev, imsg.hdr.type);
426 3baa2617 2022-02-16 op log_debug("%s: error handling imsg %d", __func__,
427 3baa2617 2022-02-16 op imsg.hdr.type);
430 3baa2617 2022-02-16 op imsg_free(&imsg);
433 3baa2617 2022-02-16 op imsg_event_add(&c->iev);
437 3baa2617 2022-02-16 op control_imsg_relay(struct imsg *imsg)
439 3baa2617 2022-02-16 op struct ctl_conn *c;
441 3baa2617 2022-02-16 op if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
444 3baa2617 2022-02-16 op return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
445 3baa2617 2022-02-16 op -1, imsg->data, IMSG_DATA_SIZE(*imsg)));