Blob
Date:
Sat Jun 11 07:57:14 2022 UTC
Message:
skip every non-regular file not only directories... I guess we can't do much even with sockets, fifos or character devices. (symbolic links are still supported since we follow them)
/*
* Copyright (c) 2022 Omar Polo <op@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <event.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <imsg.h>
#include "amused.h"
#include "control.h"
#include "log.h"
#include "playlist.h"
#include "xmalloc.h"
char *csock = NULL;
int debug;
int verbose;
struct imsgev *iev_player;
const char *argv0;
pid_t player_pid;
struct event ev_sigint;
struct event ev_sigterm;
enum amused_process {
PROC_MAIN,
PROC_PLAYER,
};
__dead void
main_shutdown(void)
{
pid_t pid;
int status;
/* close pipes. */
msgbuf_clear(&iev_player->ibuf.w);
close(iev_player->ibuf.fd);
free(iev_player);
log_debug("waiting for children to terminate");
do {
pid = wait(&status);
if (pid == -1) {
if (errno != EINTR && errno != ECHILD)
fatal("wait");
} else if (WIFSIGNALED(status))
log_warnx("player terminated; signal %d",
WTERMSIG(status));
} while (pid != -1 || (pid == -1 && errno == EINTR));
log_info("terminating");
exit(0);
}
static void
main_sig_handler(int sig, short event, void *arg)
{
/*
* Normal signal handler rules don't apply because libevent
* decouples for us.
*/
switch (sig) {
case SIGTERM:
case SIGINT:
main_shutdown();
break;
default:
fatalx("unexpected signal %d", sig);
}
}
static void
main_dispatch_player(int sig, short event, void *d)
{
struct imsgev *iev = d;
struct imsgbuf *ibuf = &iev->ibuf;
struct imsg imsg;
ssize_t n;
int shut = 0;
if (event & EV_READ) {
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read error");
if (n == 0) /* Connection closed */
shut = 1;
}
if (event & EV_WRITE) {
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
fatal("msgbuf_write");
if (n == 0) /* Connection closed */
shut = 1;
}
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("imsg_get");
if (n == 0) /* No more messages. */
break;
switch (imsg.hdr.type) {
case IMSG_ERR:
log_warnx("failed to play, skipping %s", current_song);
playlist_dropcurrent();
/* fallthrough */
case IMSG_EOF:
if (repeat_one && current_song != NULL) {
if (main_play_song(current_song))
break;
playlist_dropcurrent();
}
main_playlist_advance();
if (play_state == STATE_PLAYING)
control_notify(NULL, IMSG_CTL_NEXT);
else
control_notify(NULL, IMSG_CTL_STOP);
break;
default:
log_debug("%s: error handling imsg %d", __func__,
imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
/* This pipe is dead. Remove its event handler. */
event_del(&iev->ev);
event_loopexit(NULL);
}
}
static pid_t
start_child(enum amused_process proc, int fd)
{
const char *argv[7];
int argc = 0;
pid_t pid;
if (fd == -1 && debug)
goto exec;
switch (pid = fork()) {
case -1:
fatal("cannot fork");
case 0:
break;
default:
close(fd);
return pid;
}
if (fd != 3) {
if (fd != -1 && dup2(fd, 3) == -1)
fatal("cannot setup imsg fd");
} else if (fcntl(F_SETFD, 0) == -1)
fatal("cannot setup imsg fd");
exec:
argv[argc++] = argv0;
switch (proc) {
case PROC_MAIN:
argv[argc++] = "-s";
argv[argc++] = csock;
argv[argc++] = "-Tm";
break;
case PROC_PLAYER:
argv[argc++] = "-Tp";
break;
}
if (debug)
argv[argc++] = "-d";
if (verbose)
argv[argc++] = "-v";
argv[argc++] = NULL;
/* obnoxious casts */
execvp(argv0, (char *const *)argv);
fatal("execvp %s", argv0);
}
/* daemon main routine */
static __dead void
amused_main(void)
{
int pipe_main2player[2];
int control_fd;
log_init(debug, LOG_DAEMON);
log_setverbose(verbose);
log_procinit("main");
if (!debug)
daemon(1, 0);
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
PF_UNSPEC, pipe_main2player) == -1)
fatal("socketpair");
player_pid = start_child(PROC_PLAYER, pipe_main2player[1]);
event_init();
signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGHUP, SIG_IGN);
signal(SIGCHLD, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
iev_player = xmalloc(sizeof(*iev_player));
imsg_init(&iev_player->ibuf, pipe_main2player[0]);
iev_player->handler = main_dispatch_player;
iev_player->events = EV_READ;
event_set(&iev_player->ev, iev_player->ibuf.fd, iev_player->events,
iev_player->handler, iev_player);
event_add(&iev_player->ev, NULL);
if ((control_fd = control_init(csock)) == -1)
fatal("control socket setup failed %s", csock);
control_listen(control_fd);
if (pledge("stdio rpath unix sendfd", NULL) == -1)
fatal("pledge");
log_info("startup");
event_dispatch();
main_shutdown();
}
int
main(int argc, char **argv)
{
int ch, proc = -1;
log_init(1, LOG_DAEMON); /* Log to stderr until daemonized */
log_setverbose(1);
argv0 = argv[0];
if (argv0 == NULL)
argv0 = "amused";
while ((ch = getopt(argc, argv, "ds:T:v")) != -1) {
switch (ch) {
case 'd':
debug = 1;
break;
case 's':
free(csock);
csock = xstrdup(optarg);
break;
case 'T':
switch (*optarg) {
case 'm':
proc = PROC_MAIN;
break;
case 'p':
proc = PROC_PLAYER;
break;
default:
usage();
}
break;
case 'v':
verbose++;
break;
default:
usage();
}
}
argv += optind;
argc -= optind;
if (proc == PROC_MAIN)
amused_main();
if (proc == PROC_PLAYER)
exit(player(debug, verbose));
if (csock == NULL)
xasprintf(&csock, "/tmp/amused-%d", getuid());
if (argc > 0)
debug = 0;
ctl(argc, argv);
}
void
spawn_daemon(void)
{
start_child(PROC_MAIN, -1);
}
void
imsg_event_add(struct imsgev *iev)
{
iev->events = EV_READ;
if (iev->ibuf.w.queued)
iev->events |= EV_WRITE;
event_del(&iev->ev);
event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);
event_add(&iev->ev, NULL);
}
int
imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
pid_t pid, int fd, const void *data, uint16_t datalen)
{
int ret;
if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,
datalen)) != -1)
imsg_event_add(iev);
return ret;
}
int
main_send_player(uint16_t type, int fd)
{
return imsg_compose_event(iev_player, type, 0, 0, fd, NULL, 0);
}
int
main_play_song(const char *path)
{
struct stat sb;
int fd;
if ((fd = open(path, O_RDONLY)) == -1) {
log_warn("open %s", path);
return 0;
}
if (fstat(fd, &sb) == -1) {
log_warn("failed to stat %s", path);
close(fd);
return 0;
}
if (!S_ISREG(sb.st_mode)) {
log_info("skipping non-regular file: %s", path);
close(fd);
return 0;
}
play_state = STATE_PLAYING;
main_send_player(IMSG_PLAY, fd);
return 1;
}
void
main_playlist_jump(struct imsgev *iev, struct imsg *imsg)
{
size_t datalen;
char arg[PATH_MAX];
const char *song;
datalen = IMSG_DATA_SIZE(*imsg);
if (datalen != sizeof(arg)) {
main_senderr(iev, "wrong size");
return;
}
memcpy(arg, imsg->data, sizeof(arg));
if (arg[sizeof(arg)-1] != '\0') {
main_senderr(iev, "data corrupted");
return;
}
song = playlist_jump(arg);
if (song == NULL) {
main_senderr(iev, "not found");
return;
}
main_send_player(IMSG_STOP, -1);
if (!main_play_song(song)) {
main_senderr(iev, "can't play");
playlist_dropcurrent();
main_playlist_advance();
return;
}
main_send_status(iev);
}
void
main_playlist_resume(void)
{
const char *song;
if ((song = current_song) == NULL)
song = playlist_advance();
for (; song != NULL; song = playlist_advance()) {
if (main_play_song(song))
return;
playlist_dropcurrent();
}
}
void
main_playlist_advance(void)
{
const char *song;
for (;;) {
song = playlist_advance();
if (song == NULL)
return;
if (main_play_song(song))
break;
playlist_dropcurrent();
}
}
void
main_playlist_previous(void)
{
const char *song;
for (;;) {
song = playlist_previous();
if (song == NULL)
return;
if (main_play_song(song))
break;
playlist_dropcurrent();
}
}
void
main_restart_track(void)
{
if (current_song == NULL)
return;
if (main_play_song(current_song))
return;
playlist_dropcurrent();
main_playlist_advance();
}
void
main_senderr(struct imsgev *iev, const char *msg)
{
imsg_compose_event(iev, IMSG_CTL_ERR, 0, 0, -1,
msg, strlen(msg)+1);
}
void
main_enqueue(int tx, struct playlist *px, struct imsgev *iev,
struct imsg *imsg)
{
size_t datalen;
char path[PATH_MAX];
const char *err = NULL;
datalen = IMSG_DATA_SIZE(*imsg);
if (datalen != sizeof(path)) {
err = "data size mismatch";
goto err;
}
memcpy(path, imsg->data, sizeof(path));
if (path[datalen-1] != '\0') {
err = "malformed data";
goto err;
}
if (tx)
playlist_push(px, path);
else
playlist_enqueue(path);
imsg_compose_event(iev, IMSG_CTL_ADD, 0, 0, -1, path, sizeof(path));
return;
err:
main_senderr(iev, err);
}
void
main_send_playlist(struct imsgev *iev)
{
struct player_status s;
size_t i;
for (i = 0; i < playlist.len; ++i) {
memset(&s, 0, sizeof(s));
strlcpy(s.path, playlist.songs[i], sizeof(s.path));
s.status = play_off == i ? STATE_PLAYING : STATE_STOPPED;
imsg_compose_event(iev, IMSG_CTL_SHOW, 0, 0, -1, &s,
sizeof(s));
}
imsg_compose_event(iev, IMSG_CTL_SHOW, 0, 0, -1, NULL, 0);
}
void
main_send_status(struct imsgev *iev)
{
struct player_status s;
memset(&s, 0, sizeof(s));
if (current_song != NULL)
strlcpy(s.path, current_song, sizeof(s.path));
s.status = play_state;
s.rp.repeat_all = repeat_all;
s.rp.repeat_one = repeat_one;
imsg_compose_event(iev, IMSG_CTL_STATUS, 0, 0, -1, &s, sizeof(s));
}
Omar Polo