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.
18 3baa2617 2022-02-16 op #include <sys/types.h>
19 3baa2617 2022-02-16 op #include <sys/queue.h>
20 3baa2617 2022-02-16 op #include <sys/stat.h>
21 3baa2617 2022-02-16 op #include <sys/socket.h>
22 3baa2617 2022-02-16 op #include <sys/uio.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 3baa2617 2022-02-16 op #include <event.h>
30 3baa2617 2022-02-16 op #include <imsg.h>
31 bb3f279f 2022-02-16 op #include <limits.h>
32 14be015f 2022-02-17 op #include <stdio.h>
33 3baa2617 2022-02-16 op #include <stdlib.h>
34 3baa2617 2022-02-16 op #include <string.h>
35 3baa2617 2022-02-16 op #include <unistd.h>
37 3baa2617 2022-02-16 op #include "amused.h"
38 3baa2617 2022-02-16 op #include "log.h"
39 3baa2617 2022-02-16 op #include "control.h"
40 3baa2617 2022-02-16 op #include "playlist.h"
42 3baa2617 2022-02-16 op #define CONTROL_BACKLOG 5
45 3baa2617 2022-02-16 op struct event ev;
46 3baa2617 2022-02-16 op struct event evt;
48 3baa2617 2022-02-16 op } control_state = {.fd = -1};
50 3baa2617 2022-02-16 op struct ctl_conn {
51 3baa2617 2022-02-16 op TAILQ_ENTRY(ctl_conn) entry;
52 3baa2617 2022-02-16 op struct imsgev iev;
55 3baa2617 2022-02-16 op TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
57 3baa2617 2022-02-16 op struct ctl_conn *control_connbyfd(int);
58 3baa2617 2022-02-16 op struct ctl_conn *control_connbypid(pid_t);
59 3baa2617 2022-02-16 op void control_close(int);
62 3baa2617 2022-02-16 op control_init(char *path)
64 3baa2617 2022-02-16 op struct sockaddr_un sun;
66 3baa2617 2022-02-16 op mode_t old_umask;
68 3baa2617 2022-02-16 op if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
70 3baa2617 2022-02-16 op log_warn("%s: socket", __func__);
74 3baa2617 2022-02-16 op memset(&sun, 0, sizeof(sun));
75 3baa2617 2022-02-16 op sun.sun_family = AF_UNIX;
76 3baa2617 2022-02-16 op strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
78 3baa2617 2022-02-16 op if (unlink(path) == -1)
79 3baa2617 2022-02-16 op if (errno != ENOENT) {
80 3baa2617 2022-02-16 op log_warn("%s: unlink %s", __func__, path);
85 3baa2617 2022-02-16 op old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
86 3baa2617 2022-02-16 op if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
87 3baa2617 2022-02-16 op log_warn("%s: bind: %s", __func__, path);
89 3baa2617 2022-02-16 op umask(old_umask);
92 3baa2617 2022-02-16 op umask(old_umask);
94 3baa2617 2022-02-16 op if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
95 3baa2617 2022-02-16 op log_warn("%s: chmod", __func__);
97 3baa2617 2022-02-16 op (void)unlink(path);
105 3baa2617 2022-02-16 op control_listen(int fd)
107 3baa2617 2022-02-16 op if (control_state.fd != -1)
108 3baa2617 2022-02-16 op fatalx("%s: received unexpected controlsock", __func__);
110 3baa2617 2022-02-16 op control_state.fd = fd;
111 3baa2617 2022-02-16 op if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
112 3baa2617 2022-02-16 op log_warn("%s: listen", __func__);
116 3baa2617 2022-02-16 op event_set(&control_state.ev, control_state.fd, EV_READ,
117 3baa2617 2022-02-16 op control_accept, NULL);
118 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
119 3baa2617 2022-02-16 op evtimer_set(&control_state.evt, control_accept, NULL);
125 3baa2617 2022-02-16 op control_accept(int listenfd, short event, void *bula)
128 3baa2617 2022-02-16 op socklen_t len;
129 3baa2617 2022-02-16 op struct sockaddr_un sun;
130 3baa2617 2022-02-16 op struct ctl_conn *c;
132 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
133 3baa2617 2022-02-16 op if ((event & EV_TIMEOUT))
136 3baa2617 2022-02-16 op len = sizeof(sun);
137 3baa2617 2022-02-16 op if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
138 3baa2617 2022-02-16 op SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
140 3baa2617 2022-02-16 op * Pause accept if we are out of file descriptors, or
141 3baa2617 2022-02-16 op * libevent will haunt us here too.
143 3baa2617 2022-02-16 op if (errno == ENFILE || errno == EMFILE) {
144 3baa2617 2022-02-16 op struct timeval evtpause = { 1, 0 };
146 3baa2617 2022-02-16 op event_del(&control_state.ev);
147 3baa2617 2022-02-16 op evtimer_add(&control_state.evt, &evtpause);
148 3baa2617 2022-02-16 op } else if (errno != EWOULDBLOCK && errno != EINTR &&
149 3baa2617 2022-02-16 op errno != ECONNABORTED)
150 3baa2617 2022-02-16 op log_warn("%s: accept4", __func__);
154 3baa2617 2022-02-16 op if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
155 3baa2617 2022-02-16 op log_warn("%s: calloc", __func__);
156 3baa2617 2022-02-16 op close(connfd);
160 3baa2617 2022-02-16 op imsg_init(&c->iev.ibuf, connfd);
161 3baa2617 2022-02-16 op c->iev.handler = control_dispatch_imsg;
162 3baa2617 2022-02-16 op c->iev.events = EV_READ;
163 3baa2617 2022-02-16 op event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
164 3baa2617 2022-02-16 op c->iev.handler, &c->iev);
165 3baa2617 2022-02-16 op event_add(&c->iev.ev, NULL);
167 3baa2617 2022-02-16 op TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
170 3baa2617 2022-02-16 op struct ctl_conn *
171 3baa2617 2022-02-16 op control_connbyfd(int fd)
173 3baa2617 2022-02-16 op struct ctl_conn *c;
175 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
176 3baa2617 2022-02-16 op if (c->iev.ibuf.fd == fd)
183 3baa2617 2022-02-16 op struct ctl_conn *
184 3baa2617 2022-02-16 op control_connbypid(pid_t pid)
186 3baa2617 2022-02-16 op struct ctl_conn *c;
188 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
189 3baa2617 2022-02-16 op if (c->iev.ibuf.pid == pid)
197 3baa2617 2022-02-16 op control_close(int fd)
199 3baa2617 2022-02-16 op struct ctl_conn *c;
201 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
202 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
206 3baa2617 2022-02-16 op msgbuf_clear(&c->iev.ibuf.w);
207 3baa2617 2022-02-16 op TAILQ_REMOVE(&ctl_conns, c, entry);
209 3baa2617 2022-02-16 op event_del(&c->iev.ev);
210 3baa2617 2022-02-16 op close(c->iev.ibuf.fd);
212 3baa2617 2022-02-16 op /* Some file descriptors are available again. */
213 3baa2617 2022-02-16 op if (evtimer_pending(&control_state.evt, NULL)) {
214 3baa2617 2022-02-16 op evtimer_del(&control_state.evt);
215 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
222 3baa2617 2022-02-16 op control_dispatch_imsg(int fd, short event, void *bula)
224 3baa2617 2022-02-16 op struct ctl_conn *c;
225 3baa2617 2022-02-16 op struct imsg imsg;
228 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
229 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
233 3baa2617 2022-02-16 op if (event & EV_READ) {
234 3baa2617 2022-02-16 op if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
236 3baa2617 2022-02-16 op control_close(fd);
240 3baa2617 2022-02-16 op if (event & EV_WRITE) {
241 3baa2617 2022-02-16 op if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
242 3baa2617 2022-02-16 op control_close(fd);
248 3baa2617 2022-02-16 op if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
249 3baa2617 2022-02-16 op control_close(fd);
255 3baa2617 2022-02-16 op switch (imsg.hdr.type) {
256 3baa2617 2022-02-16 op case IMSG_CTL_PLAY:
257 3baa2617 2022-02-16 op switch (play_state) {
258 3baa2617 2022-02-16 op case STATE_STOPPED:
259 2f589330 2022-02-17 op main_playlist_resume();
261 3baa2617 2022-02-16 op case STATE_PLAYING:
262 3baa2617 2022-02-16 op /* do nothing */
264 3baa2617 2022-02-16 op case STATE_PAUSED:
265 950ad05c 2022-02-16 op play_state = STATE_PLAYING;
266 06961b72 2022-02-16 op main_send_player(IMSG_RESUME, -1, NULL, 0);
270 3baa2617 2022-02-16 op case IMSG_CTL_TOGGLE_PLAY:
271 3baa2617 2022-02-16 op switch (play_state) {
272 3baa2617 2022-02-16 op case STATE_STOPPED:
273 2f589330 2022-02-17 op main_playlist_resume();
275 3baa2617 2022-02-16 op case STATE_PLAYING:
276 2ac7eafd 2022-02-16 op play_state = STATE_PAUSED;
277 06961b72 2022-02-16 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
279 3baa2617 2022-02-16 op case STATE_PAUSED:
280 2ac7eafd 2022-02-16 op play_state = STATE_PLAYING;
281 06961b72 2022-02-16 op main_send_player(IMSG_RESUME, -1, NULL, 0);
285 3baa2617 2022-02-16 op case IMSG_CTL_PAUSE:
286 3baa2617 2022-02-16 op if (play_state != STATE_PLAYING)
288 950ad05c 2022-02-16 op play_state = STATE_PAUSED;
289 06961b72 2022-02-16 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
291 3baa2617 2022-02-16 op case IMSG_CTL_STOP:
292 3baa2617 2022-02-16 op if (play_state == STATE_STOPPED)
294 bfaa7897 2022-02-17 op play_state = STATE_STOPPED;
295 06961b72 2022-02-16 op main_send_player(IMSG_STOP, -1, NULL, 0);
297 3baa2617 2022-02-16 op case IMSG_CTL_RESTART:
298 06961b72 2022-02-16 op main_send_player(IMSG_STOP, -1, NULL, 0);
299 aaccc123 2022-02-16 op main_restart_track();
301 3baa2617 2022-02-16 op case IMSG_CTL_ADD:
302 3baa2617 2022-02-16 op main_enqueue(&c->iev, &imsg);
304 3baa2617 2022-02-16 op case IMSG_CTL_FLUSH:
305 3baa2617 2022-02-16 op playlist_truncate();
307 3baa2617 2022-02-16 op case IMSG_CTL_SHOW:
308 d980494c 2022-02-16 op main_send_playlist(&c->iev);
310 bb3f279f 2022-02-16 op case IMSG_CTL_STATUS:
311 bb3f279f 2022-02-16 op main_send_status(&c->iev);
313 af27e631 2022-02-17 op case IMSG_CTL_NEXT:
314 af27e631 2022-02-17 op main_send_player(IMSG_STOP, -1, NULL, 0);
315 af27e631 2022-02-17 op main_playlist_advance();
317 af27e631 2022-02-17 op case IMSG_CTL_PREV:
318 af27e631 2022-02-17 op main_send_player(IMSG_STOP, -1, NULL, 0);
319 af27e631 2022-02-17 op main_playlist_previous();
322 3baa2617 2022-02-16 op log_debug("%s: error handling imsg %d", __func__,
323 3baa2617 2022-02-16 op imsg.hdr.type);
326 3baa2617 2022-02-16 op imsg_free(&imsg);
329 3baa2617 2022-02-16 op imsg_event_add(&c->iev);
333 3baa2617 2022-02-16 op control_imsg_relay(struct imsg *imsg)
335 3baa2617 2022-02-16 op struct ctl_conn *c;
337 3baa2617 2022-02-16 op if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
340 3baa2617 2022-02-16 op return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
341 3baa2617 2022-02-16 op -1, imsg->data, IMSG_DATA_SIZE(*imsg)));