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.
18 #include <sys/types.h>
19 #include <sys/queue.h>
21 #include <sys/socket.h>
25 #include <netinet/in.h>
41 #define CONTROL_BACKLOG 5
47 } control_state = {.fd = -1};
50 TAILQ_ENTRY(ctl_conn) entry;
54 TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
56 struct ctl_conn *control_connbyfd(int);
57 struct ctl_conn *control_connbypid(pid_t);
58 void control_close(int);
61 control_init(char *path)
63 struct sockaddr_un sun;
67 if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
69 log_warn("%s: socket", __func__);
73 memset(&sun, 0, sizeof(sun));
74 sun.sun_family = AF_UNIX;
75 strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
77 if (unlink(path) == -1)
78 if (errno != ENOENT) {
79 log_warn("%s: unlink %s", __func__, path);
84 old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
85 if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
86 log_warn("%s: bind: %s", __func__, path);
93 if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
94 log_warn("%s: chmod", __func__);
104 control_listen(int fd)
106 if (control_state.fd != -1)
107 fatalx("%s: received unexpected controlsock", __func__);
109 control_state.fd = fd;
110 if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
111 log_warn("%s: listen", __func__);
115 event_set(&control_state.ev, control_state.fd, EV_READ,
116 control_accept, NULL);
117 event_add(&control_state.ev, NULL);
118 evtimer_set(&control_state.evt, control_accept, NULL);
124 control_accept(int listenfd, short event, void *bula)
128 struct sockaddr_un sun;
131 event_add(&control_state.ev, NULL);
132 if ((event & EV_TIMEOUT))
136 if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
137 SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
139 * Pause accept if we are out of file descriptors, or
140 * libevent will haunt us here too.
142 if (errno == ENFILE || errno == EMFILE) {
143 struct timeval evtpause = { 1, 0 };
145 event_del(&control_state.ev);
146 evtimer_add(&control_state.evt, &evtpause);
147 } else if (errno != EWOULDBLOCK && errno != EINTR &&
148 errno != ECONNABORTED)
149 log_warn("%s: accept4", __func__);
153 if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
154 log_warn("%s: calloc", __func__);
159 imsg_init(&c->iev.ibuf, connfd);
160 c->iev.handler = control_dispatch_imsg;
161 c->iev.events = EV_READ;
162 event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
163 c->iev.handler, &c->iev);
164 event_add(&c->iev.ev, NULL);
166 TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
170 control_connbyfd(int fd)
174 TAILQ_FOREACH(c, &ctl_conns, entry) {
175 if (c->iev.ibuf.fd == fd)
183 control_connbypid(pid_t pid)
187 TAILQ_FOREACH(c, &ctl_conns, entry) {
188 if (c->iev.ibuf.pid == pid)
196 control_close(int fd)
200 if ((c = control_connbyfd(fd)) == NULL) {
201 log_warnx("%s: fd %d: not found", __func__, fd);
205 msgbuf_clear(&c->iev.ibuf.w);
206 TAILQ_REMOVE(&ctl_conns, c, entry);
208 event_del(&c->iev.ev);
209 close(c->iev.ibuf.fd);
211 /* Some file descriptors are available again. */
212 if (evtimer_pending(&control_state.evt, NULL)) {
213 evtimer_del(&control_state.evt);
214 event_add(&control_state.ev, NULL);
221 control_dispatch_imsg(int fd, short event, void *bula)
227 if ((c = control_connbyfd(fd)) == NULL) {
228 log_warnx("%s: fd %d: not found", __func__, fd);
232 if (event & EV_READ) {
233 if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
239 if (event & EV_WRITE) {
240 if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
247 if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
254 switch (imsg.hdr.type) {
256 switch (play_state) {
258 main_playlist_advance();
264 play_state = STATE_PLAYING;
265 main_send_player(IMSG_RESUME, -1, NULL, 0);
269 case IMSG_CTL_TOGGLE_PLAY:
270 switch (play_state) {
272 main_playlist_advance();
275 play_state = STATE_PAUSED;
276 main_send_player(IMSG_PAUSE, -1, NULL, 0);
279 play_state = STATE_PLAYING;
280 main_send_player(IMSG_RESUME, -1, NULL, 0);
285 if (play_state != STATE_PLAYING)
287 play_state = STATE_PAUSED;
288 main_send_player(IMSG_PAUSE, -1, NULL, 0);
291 if (play_state == STATE_STOPPED)
293 main_send_player(IMSG_STOP, -1, NULL, 0);
295 case IMSG_CTL_RESTART:
296 main_send_player(IMSG_STOP, -1, NULL, 0);
297 main_restart_track();
300 main_enqueue(&c->iev, &imsg);
306 main_send_playlist(&c->iev);
308 case IMSG_CTL_STATUS:
309 main_send_status(&c->iev);
312 log_debug("%s: error handling imsg %d", __func__,
319 imsg_event_add(&c->iev);
323 control_imsg_relay(struct imsg *imsg)
327 if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
330 return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
331 -1, imsg->data, IMSG_DATA_SIZE(*imsg)));