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 3baa2617 2022-02-16 op #include <stdlib.h>
33 3baa2617 2022-02-16 op #include <string.h>
34 3baa2617 2022-02-16 op #include <unistd.h>
36 3baa2617 2022-02-16 op #include "amused.h"
37 3baa2617 2022-02-16 op #include "log.h"
38 3baa2617 2022-02-16 op #include "control.h"
39 3baa2617 2022-02-16 op #include "playlist.h"
41 3baa2617 2022-02-16 op #define CONTROL_BACKLOG 5
44 3baa2617 2022-02-16 op struct event ev;
45 3baa2617 2022-02-16 op struct event evt;
47 3baa2617 2022-02-16 op } control_state = {.fd = -1};
49 3baa2617 2022-02-16 op struct ctl_conn {
50 3baa2617 2022-02-16 op TAILQ_ENTRY(ctl_conn) entry;
51 3baa2617 2022-02-16 op struct imsgev iev;
54 3baa2617 2022-02-16 op TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
56 3baa2617 2022-02-16 op struct ctl_conn *control_connbyfd(int);
57 3baa2617 2022-02-16 op struct ctl_conn *control_connbypid(pid_t);
58 3baa2617 2022-02-16 op void control_close(int);
61 3baa2617 2022-02-16 op control_init(char *path)
63 3baa2617 2022-02-16 op struct sockaddr_un sun;
65 3baa2617 2022-02-16 op mode_t old_umask;
67 3baa2617 2022-02-16 op if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
69 3baa2617 2022-02-16 op log_warn("%s: socket", __func__);
73 3baa2617 2022-02-16 op memset(&sun, 0, sizeof(sun));
74 3baa2617 2022-02-16 op sun.sun_family = AF_UNIX;
75 3baa2617 2022-02-16 op strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
77 3baa2617 2022-02-16 op if (unlink(path) == -1)
78 3baa2617 2022-02-16 op if (errno != ENOENT) {
79 3baa2617 2022-02-16 op log_warn("%s: unlink %s", __func__, path);
84 3baa2617 2022-02-16 op old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
85 3baa2617 2022-02-16 op if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
86 3baa2617 2022-02-16 op log_warn("%s: bind: %s", __func__, path);
88 3baa2617 2022-02-16 op umask(old_umask);
91 3baa2617 2022-02-16 op umask(old_umask);
93 3baa2617 2022-02-16 op if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
94 3baa2617 2022-02-16 op log_warn("%s: chmod", __func__);
96 3baa2617 2022-02-16 op (void)unlink(path);
104 3baa2617 2022-02-16 op control_listen(int fd)
106 3baa2617 2022-02-16 op if (control_state.fd != -1)
107 3baa2617 2022-02-16 op fatalx("%s: received unexpected controlsock", __func__);
109 3baa2617 2022-02-16 op control_state.fd = fd;
110 3baa2617 2022-02-16 op if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
111 3baa2617 2022-02-16 op log_warn("%s: listen", __func__);
115 3baa2617 2022-02-16 op event_set(&control_state.ev, control_state.fd, EV_READ,
116 3baa2617 2022-02-16 op control_accept, NULL);
117 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
118 3baa2617 2022-02-16 op evtimer_set(&control_state.evt, control_accept, NULL);
124 3baa2617 2022-02-16 op control_accept(int listenfd, short event, void *bula)
127 3baa2617 2022-02-16 op socklen_t len;
128 3baa2617 2022-02-16 op struct sockaddr_un sun;
129 3baa2617 2022-02-16 op struct ctl_conn *c;
131 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
132 3baa2617 2022-02-16 op if ((event & EV_TIMEOUT))
135 3baa2617 2022-02-16 op len = sizeof(sun);
136 3baa2617 2022-02-16 op if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
137 3baa2617 2022-02-16 op SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
139 3baa2617 2022-02-16 op * Pause accept if we are out of file descriptors, or
140 3baa2617 2022-02-16 op * libevent will haunt us here too.
142 3baa2617 2022-02-16 op if (errno == ENFILE || errno == EMFILE) {
143 3baa2617 2022-02-16 op struct timeval evtpause = { 1, 0 };
145 3baa2617 2022-02-16 op event_del(&control_state.ev);
146 3baa2617 2022-02-16 op evtimer_add(&control_state.evt, &evtpause);
147 3baa2617 2022-02-16 op } else if (errno != EWOULDBLOCK && errno != EINTR &&
148 3baa2617 2022-02-16 op errno != ECONNABORTED)
149 3baa2617 2022-02-16 op log_warn("%s: accept4", __func__);
153 3baa2617 2022-02-16 op if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
154 3baa2617 2022-02-16 op log_warn("%s: calloc", __func__);
155 3baa2617 2022-02-16 op close(connfd);
159 3baa2617 2022-02-16 op imsg_init(&c->iev.ibuf, connfd);
160 3baa2617 2022-02-16 op c->iev.handler = control_dispatch_imsg;
161 3baa2617 2022-02-16 op c->iev.events = EV_READ;
162 3baa2617 2022-02-16 op event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
163 3baa2617 2022-02-16 op c->iev.handler, &c->iev);
164 3baa2617 2022-02-16 op event_add(&c->iev.ev, NULL);
166 3baa2617 2022-02-16 op TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
169 3baa2617 2022-02-16 op struct ctl_conn *
170 3baa2617 2022-02-16 op control_connbyfd(int fd)
172 3baa2617 2022-02-16 op struct ctl_conn *c;
174 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
175 3baa2617 2022-02-16 op if (c->iev.ibuf.fd == fd)
182 3baa2617 2022-02-16 op struct ctl_conn *
183 3baa2617 2022-02-16 op control_connbypid(pid_t pid)
185 3baa2617 2022-02-16 op struct ctl_conn *c;
187 3baa2617 2022-02-16 op TAILQ_FOREACH(c, &ctl_conns, entry) {
188 3baa2617 2022-02-16 op if (c->iev.ibuf.pid == pid)
196 3baa2617 2022-02-16 op control_close(int fd)
198 3baa2617 2022-02-16 op struct ctl_conn *c;
200 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
201 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
205 3baa2617 2022-02-16 op msgbuf_clear(&c->iev.ibuf.w);
206 3baa2617 2022-02-16 op TAILQ_REMOVE(&ctl_conns, c, entry);
208 3baa2617 2022-02-16 op event_del(&c->iev.ev);
209 3baa2617 2022-02-16 op close(c->iev.ibuf.fd);
211 3baa2617 2022-02-16 op /* Some file descriptors are available again. */
212 3baa2617 2022-02-16 op if (evtimer_pending(&control_state.evt, NULL)) {
213 3baa2617 2022-02-16 op evtimer_del(&control_state.evt);
214 3baa2617 2022-02-16 op event_add(&control_state.ev, NULL);
221 3baa2617 2022-02-16 op control_dispatch_imsg(int fd, short event, void *bula)
223 3baa2617 2022-02-16 op struct ctl_conn *c;
224 3baa2617 2022-02-16 op struct imsg imsg;
227 3baa2617 2022-02-16 op if ((c = control_connbyfd(fd)) == NULL) {
228 3baa2617 2022-02-16 op log_warnx("%s: fd %d: not found", __func__, fd);
232 3baa2617 2022-02-16 op if (event & EV_READ) {
233 3baa2617 2022-02-16 op if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
235 3baa2617 2022-02-16 op control_close(fd);
239 3baa2617 2022-02-16 op if (event & EV_WRITE) {
240 3baa2617 2022-02-16 op if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
241 3baa2617 2022-02-16 op control_close(fd);
247 3baa2617 2022-02-16 op if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
248 3baa2617 2022-02-16 op control_close(fd);
254 3baa2617 2022-02-16 op switch (imsg.hdr.type) {
255 3baa2617 2022-02-16 op case IMSG_CTL_PLAY:
256 3baa2617 2022-02-16 op switch (play_state) {
257 3baa2617 2022-02-16 op case STATE_STOPPED:
258 aaccc123 2022-02-16 op main_playlist_advance();
260 3baa2617 2022-02-16 op case STATE_PLAYING:
261 3baa2617 2022-02-16 op /* do nothing */
263 3baa2617 2022-02-16 op case STATE_PAUSED:
264 950ad05c 2022-02-16 op play_state = STATE_PLAYING;
265 06961b72 2022-02-16 op main_send_player(IMSG_RESUME, -1, NULL, 0);
269 3baa2617 2022-02-16 op case IMSG_CTL_TOGGLE_PLAY:
270 3baa2617 2022-02-16 op switch (play_state) {
271 3baa2617 2022-02-16 op case STATE_STOPPED:
272 aaccc123 2022-02-16 op main_playlist_advance();
274 3baa2617 2022-02-16 op case STATE_PLAYING:
275 2ac7eafd 2022-02-16 op play_state = STATE_PAUSED;
276 06961b72 2022-02-16 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
278 3baa2617 2022-02-16 op case STATE_PAUSED:
279 2ac7eafd 2022-02-16 op play_state = STATE_PLAYING;
280 06961b72 2022-02-16 op main_send_player(IMSG_RESUME, -1, NULL, 0);
284 3baa2617 2022-02-16 op case IMSG_CTL_PAUSE:
285 3baa2617 2022-02-16 op if (play_state != STATE_PLAYING)
287 950ad05c 2022-02-16 op play_state = STATE_PAUSED;
288 06961b72 2022-02-16 op main_send_player(IMSG_PAUSE, -1, NULL, 0);
290 3baa2617 2022-02-16 op case IMSG_CTL_STOP:
291 3baa2617 2022-02-16 op if (play_state == STATE_STOPPED)
293 06961b72 2022-02-16 op main_send_player(IMSG_STOP, -1, NULL, 0);
295 3baa2617 2022-02-16 op case IMSG_CTL_RESTART:
296 06961b72 2022-02-16 op main_send_player(IMSG_STOP, -1, NULL, 0);
297 aaccc123 2022-02-16 op main_restart_track();
299 3baa2617 2022-02-16 op case IMSG_CTL_ADD:
300 3baa2617 2022-02-16 op main_enqueue(&c->iev, &imsg);
302 3baa2617 2022-02-16 op case IMSG_CTL_FLUSH:
303 3baa2617 2022-02-16 op playlist_truncate();
305 3baa2617 2022-02-16 op case IMSG_CTL_SHOW:
306 d980494c 2022-02-16 op main_send_playlist(&c->iev);
308 bb3f279f 2022-02-16 op case IMSG_CTL_STATUS:
309 bb3f279f 2022-02-16 op main_send_status(&c->iev);
312 3baa2617 2022-02-16 op log_debug("%s: error handling imsg %d", __func__,
313 3baa2617 2022-02-16 op imsg.hdr.type);
316 3baa2617 2022-02-16 op imsg_free(&imsg);
319 3baa2617 2022-02-16 op imsg_event_add(&c->iev);
323 3baa2617 2022-02-16 op control_imsg_relay(struct imsg *imsg)
325 3baa2617 2022-02-16 op struct ctl_conn *c;
327 3baa2617 2022-02-16 op if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
330 3baa2617 2022-02-16 op return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
331 3baa2617 2022-02-16 op -1, imsg->data, IMSG_DATA_SIZE(*imsg)));