2 3baa2617 2022-02-16 op * Copyright (c) 2022 Omar Polo <op@openbsd.org>
4 3baa2617 2022-02-16 op * Permission to use, copy, modify, and distribute this software for any
5 3baa2617 2022-02-16 op * purpose with or without fee is hereby granted, provided that the above
6 3baa2617 2022-02-16 op * copyright notice and this permission notice appear in all copies.
8 3baa2617 2022-02-16 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 3baa2617 2022-02-16 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 3baa2617 2022-02-16 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 3baa2617 2022-02-16 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 3baa2617 2022-02-16 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 3baa2617 2022-02-16 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 3baa2617 2022-02-16 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 3baa2617 2022-02-16 op #include <sys/types.h>
18 3baa2617 2022-02-16 op #include <sys/queue.h>
19 3baa2617 2022-02-16 op #include <sys/socket.h>
20 3baa2617 2022-02-16 op #include <sys/uio.h>
21 3baa2617 2022-02-16 op #include <sys/wait.h>
23 3baa2617 2022-02-16 op #include <event.h>
24 3baa2617 2022-02-16 op #include <errno.h>
25 3baa2617 2022-02-16 op #include <fcntl.h>
26 3baa2617 2022-02-16 op #include <limits.h>
27 3baa2617 2022-02-16 op #include <sndio.h>
28 3baa2617 2022-02-16 op #include <signal.h>
29 3baa2617 2022-02-16 op #include <stdio.h>
30 3baa2617 2022-02-16 op #include <stdlib.h>
31 3baa2617 2022-02-16 op #include <stdint.h>
32 3baa2617 2022-02-16 op #include <string.h>
33 3baa2617 2022-02-16 op #include <syslog.h>
34 3baa2617 2022-02-16 op #include <unistd.h>
35 3baa2617 2022-02-16 op #include <imsg.h>
37 3baa2617 2022-02-16 op #include "amused.h"
38 3baa2617 2022-02-16 op #include "control.h"
39 3baa2617 2022-02-16 op #include "log.h"
40 3baa2617 2022-02-16 op #include "playlist.h"
41 3baa2617 2022-02-16 op #include "xmalloc.h"
43 3baa2617 2022-02-16 op struct sio_hdl *hdl;
44 3baa2617 2022-02-16 op char *csock = NULL;
47 3baa2617 2022-02-16 op struct imsgev *iev_player;
49 3baa2617 2022-02-16 op const char *argv0;
50 3baa2617 2022-02-16 op pid_t player_pid;
51 3baa2617 2022-02-16 op struct event ev_sigint;
52 3baa2617 2022-02-16 op struct event ev_sigterm;
54 3baa2617 2022-02-16 op enum amused_process {
60 3baa2617 2022-02-16 op main_shutdown(void)
65 3baa2617 2022-02-16 op /* close pipes. */
66 3baa2617 2022-02-16 op msgbuf_clear(&iev_player->ibuf.w);
67 3baa2617 2022-02-16 op close(iev_player->ibuf.fd);
68 3baa2617 2022-02-16 op free(iev_player);
70 3baa2617 2022-02-16 op log_debug("waiting for children to terminate");
72 3baa2617 2022-02-16 op pid = wait(&status);
73 3baa2617 2022-02-16 op if (pid == -1) {
74 3baa2617 2022-02-16 op if (errno != EINTR && errno != ECHILD)
75 3baa2617 2022-02-16 op fatal("wait");
76 3baa2617 2022-02-16 op } else if (WIFSIGNALED(status))
77 3baa2617 2022-02-16 op log_warnx("player terminated; signal %d",
78 3baa2617 2022-02-16 op WTERMSIG(status));
79 3baa2617 2022-02-16 op } while (pid != -1 || (pid == -1 && errno == EINTR));
81 3baa2617 2022-02-16 op log_info("terminating");
86 3baa2617 2022-02-16 op main_sig_handler(int sig, short event, void *arg)
89 3baa2617 2022-02-16 op * Normal signal handler rules don't apply because libevent
90 3baa2617 2022-02-16 op * decouples for us.
93 3baa2617 2022-02-16 op switch (sig) {
96 3baa2617 2022-02-16 op main_shutdown();
99 3baa2617 2022-02-16 op fatalx("unexpected signal %d", sig);
104 3baa2617 2022-02-16 op main_dispatch_player(int sig, short event, void *d)
106 3baa2617 2022-02-16 op struct imsgev *iev = d;
107 3baa2617 2022-02-16 op struct imsgbuf *ibuf = &iev->ibuf;
108 3baa2617 2022-02-16 op struct imsg imsg;
110 3baa2617 2022-02-16 op int shut = 0;
111 3baa2617 2022-02-16 op const char *song;
113 3baa2617 2022-02-16 op if (event & EV_READ) {
114 3baa2617 2022-02-16 op if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
115 3baa2617 2022-02-16 op fatal("imsg_read error");
116 3baa2617 2022-02-16 op if (n == 0) /* Connection closed */
119 3baa2617 2022-02-16 op if (event & EV_WRITE) {
120 3baa2617 2022-02-16 op if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
121 3baa2617 2022-02-16 op fatal("msgbuf_write");
122 3baa2617 2022-02-16 op if (n == 0) /* Connection closed */
127 3baa2617 2022-02-16 op if ((n = imsg_get(ibuf, &imsg)) == -1)
128 3baa2617 2022-02-16 op fatal("imsg_get");
129 3baa2617 2022-02-16 op if (n == 0) /* No more messages. */
132 3baa2617 2022-02-16 op switch (imsg.hdr.type) {
133 3baa2617 2022-02-16 op case IMSG_EOF:
134 3baa2617 2022-02-16 op case IMSG_ERR:
135 3baa2617 2022-02-16 op song = playlist_advance();
136 3baa2617 2022-02-16 op if (song == NULL)
138 3baa2617 2022-02-16 op /* XXX: watch out for failures! */
139 3baa2617 2022-02-16 op main_play_song(song);
142 3baa2617 2022-02-16 op log_debug("%s: error handling imsg %d", __func__,
143 3baa2617 2022-02-16 op imsg.hdr.type);
146 3baa2617 2022-02-16 op imsg_free(&imsg);
150 3baa2617 2022-02-16 op imsg_event_add(iev);
152 3baa2617 2022-02-16 op /* This pipe is dead. Remove its event handler. */
153 3baa2617 2022-02-16 op event_del(&iev->ev);
154 3baa2617 2022-02-16 op event_loopexit(NULL);
159 3baa2617 2022-02-16 op start_child(enum amused_process proc, int fd)
161 3baa2617 2022-02-16 op const char *argv[5];
162 3baa2617 2022-02-16 op int argc = 0;
165 3baa2617 2022-02-16 op switch (pid = fork()) {
167 3baa2617 2022-02-16 op fatal("cannot fork");
175 3baa2617 2022-02-16 op if (fd != 3) {
176 3baa2617 2022-02-16 op if (dup2(fd, 3) == -1)
177 3baa2617 2022-02-16 op fatal("cannot setup imsg fd");
178 3baa2617 2022-02-16 op } else if (fcntl(F_SETFD, 0) == -1)
179 3baa2617 2022-02-16 op fatal("cannot setup imsg fd");
181 3baa2617 2022-02-16 op argv[argc++] = argv0;
182 3baa2617 2022-02-16 op switch (proc) {
183 3baa2617 2022-02-16 op case PROC_MAIN:
184 3baa2617 2022-02-16 op fatal("can not start main process");
185 3baa2617 2022-02-16 op case PROC_PLAYER:
186 3baa2617 2022-02-16 op argv[argc++] = "-Tp";
191 3baa2617 2022-02-16 op argv[argc++] = "-d";
193 3baa2617 2022-02-16 op argv[argc++] = "-v";
194 3baa2617 2022-02-16 op argv[argc++] = NULL;
196 3baa2617 2022-02-16 op /* obnoxious casts */
197 3baa2617 2022-02-16 op execvp(argv0, (char *const *)argv);
198 3baa2617 2022-02-16 op fatal("execvp %s", argv0);
201 3baa2617 2022-02-16 op /* daemon main routine */
202 3baa2617 2022-02-16 op static __dead int
203 3baa2617 2022-02-16 op amused_main(void)
205 3baa2617 2022-02-16 op int pipe_main2player[2];
206 3baa2617 2022-02-16 op int control_fd;
208 3baa2617 2022-02-16 op log_init(debug, LOG_DAEMON);
209 3baa2617 2022-02-16 op log_setverbose(verbose);
210 3baa2617 2022-02-16 op log_procinit("main");
213 3baa2617 2022-02-16 op daemon(1, 0);
215 3baa2617 2022-02-16 op if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
216 3baa2617 2022-02-16 op PF_UNSPEC, pipe_main2player) == -1)
217 3baa2617 2022-02-16 op fatal("socketpair");
219 3baa2617 2022-02-16 op player_pid = start_child(PROC_PLAYER, pipe_main2player[1]);
221 3baa2617 2022-02-16 op event_init();
223 3baa2617 2022-02-16 op signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);
224 3baa2617 2022-02-16 op signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);
226 3baa2617 2022-02-16 op signal_add(&ev_sigint, NULL);
227 3baa2617 2022-02-16 op signal_add(&ev_sigterm, NULL);
229 3baa2617 2022-02-16 op signal(SIGHUP, SIG_IGN);
230 3baa2617 2022-02-16 op signal(SIGCHLD, SIG_IGN);
231 3baa2617 2022-02-16 op signal(SIGPIPE, SIG_IGN);
233 3baa2617 2022-02-16 op iev_player = xmalloc(sizeof(*iev_player));
234 3baa2617 2022-02-16 op imsg_init(&iev_player->ibuf, pipe_main2player[0]);
235 3baa2617 2022-02-16 op iev_player->handler = main_dispatch_player;
236 3baa2617 2022-02-16 op iev_player->events = EV_READ;
237 3baa2617 2022-02-16 op event_set(&iev_player->ev, iev_player->ibuf.fd, iev_player->events,
238 3baa2617 2022-02-16 op iev_player->handler, iev_player);
239 3baa2617 2022-02-16 op event_add(&iev_player->ev, NULL);
241 3baa2617 2022-02-16 op if ((control_fd = control_init(csock)) == -1)
242 3baa2617 2022-02-16 op fatal("control socket setup failed %s", csock);
243 3baa2617 2022-02-16 op control_listen(control_fd);
245 3baa2617 2022-02-16 op if (pledge("stdio rpath unix sendfd", NULL) == -1)
246 3baa2617 2022-02-16 op fatal("pledge");
248 3baa2617 2022-02-16 op log_info("startup");
249 3baa2617 2022-02-16 op event_dispatch();
250 3baa2617 2022-02-16 op main_shutdown();
254 3baa2617 2022-02-16 op main(int argc, char **argv)
256 3baa2617 2022-02-16 op int ch, proc = PROC_MAIN;
258 3baa2617 2022-02-16 op log_init(1, LOG_DAEMON); /* Log to stderr until daemonized */
259 3baa2617 2022-02-16 op log_setverbose(1);
261 3baa2617 2022-02-16 op argv0 = argv[0];
262 3baa2617 2022-02-16 op if (argv0 == NULL)
263 3baa2617 2022-02-16 op argv0 = "amused";
265 3baa2617 2022-02-16 op while ((ch = getopt(argc, argv, "ds:T:vV")) != -1) {
266 3baa2617 2022-02-16 op switch (ch) {
272 3baa2617 2022-02-16 op csock = xstrdup(optarg);
275 3baa2617 2022-02-16 op switch (*optarg) {
277 3baa2617 2022-02-16 op proc = PROC_PLAYER;
287 3baa2617 2022-02-16 op printf("%s version %s\n", getprogname(),
288 3baa2617 2022-02-16 op AMUSED_VERSION);
294 3baa2617 2022-02-16 op argv += optind;
295 3baa2617 2022-02-16 op argc -= optind;
297 3baa2617 2022-02-16 op if (proc == PROC_PLAYER)
298 3baa2617 2022-02-16 op exit(player(debug, verbose));
300 3baa2617 2022-02-16 op if (csock == NULL)
301 3baa2617 2022-02-16 op xasprintf(&csock, "/tmp/amused-%d", getuid());
303 3baa2617 2022-02-16 op if (argc == 0)
304 3baa2617 2022-02-16 op amused_main();
306 3baa2617 2022-02-16 op ctl(argc, argv);
311 3baa2617 2022-02-16 op imsg_event_add(struct imsgev *iev)
313 3baa2617 2022-02-16 op iev->events = EV_READ;
314 3baa2617 2022-02-16 op if (iev->ibuf.w.queued)
315 3baa2617 2022-02-16 op iev->events |= EV_WRITE;
317 3baa2617 2022-02-16 op event_del(&iev->ev);
318 3baa2617 2022-02-16 op event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);
319 3baa2617 2022-02-16 op event_add(&iev->ev, NULL);
323 3baa2617 2022-02-16 op imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
324 3baa2617 2022-02-16 op pid_t pid, int fd, const void *data, uint16_t datalen)
328 3baa2617 2022-02-16 op if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,
329 3baa2617 2022-02-16 op datalen)) != -1)
330 3baa2617 2022-02-16 op imsg_event_add(iev);
336 3baa2617 2022-02-16 op main_play_song(const char *song)
338 3baa2617 2022-02-16 op char path[PATH_MAX] = { 0 };
341 3baa2617 2022-02-16 op strlcpy(path, song, sizeof(path));
342 3baa2617 2022-02-16 op if ((fd = open(path, O_RDONLY)) == -1) {
344 3baa2617 2022-02-16 op log_warn("open %s", path);
347 3baa2617 2022-02-16 op fatal("open %s", path);
351 3baa2617 2022-02-16 op imsg_compose_event(iev_player, IMSG_PLAY, 0, 0, fd,
352 3baa2617 2022-02-16 op path, sizeof(path));
357 3baa2617 2022-02-16 op main_enqueue(struct imsgev *iev, struct imsg *imsg)
359 3baa2617 2022-02-16 op size_t datalen;
360 3baa2617 2022-02-16 op char path[PATH_MAX] = { 0 };
361 3baa2617 2022-02-16 op const char *err = NULL;
363 3baa2617 2022-02-16 op datalen = IMSG_DATA_SIZE(*imsg);
364 3baa2617 2022-02-16 op if (datalen != sizeof(path)) {
365 3baa2617 2022-02-16 op err = "data size mismatch";
369 3baa2617 2022-02-16 op memcpy(path, imsg->data, sizeof(path));
370 3baa2617 2022-02-16 op if (path[datalen-1] != '\0') {
371 3baa2617 2022-02-16 op err = "malformed data";
375 3baa2617 2022-02-16 op playlist_enqueue(path);
376 3baa2617 2022-02-16 op imsg_compose_event(iev, IMSG_CTL_ADD, 0, 0, -1, path, sizeof(path));
379 3baa2617 2022-02-16 op imsg_compose_event(iev, IMSG_CTL_ERR, 0, 0, -1, err, strlen(err)+1);