};
/**
- * Ask the parent process to call a given function.
+ * Ask the afs process to call a given function.
*
* \param f The function to be called.
* \param query Pointer to arbitrary data for the callback.
return 1;
}
+/**
+ * Execute the given function for each matching row.
+ *
+ * \param pmd Describes what to match and how.
+ *
+ * \return The return value of the underlying call to osl_rbtree_loop()
+ * or osl_rbtree_loop_reverse().
+ */
int for_each_matching_row(struct pattern_match_data *pmd)
{
if (pmd->pm_flags & PM_REVERSE_LOOP)
return para_munmap(afd->map.data, afd->map.size);
}
-#if 0
-static void play_loop(enum play_mode current_play_mode)
-{
- int i, ret;
- struct audio_file_data afd;
-
- afd.current_play_mode = current_play_mode;
- for (i = 0; i < 0; i++) {
- ret = open_next_audio_file(&afd);
- if (ret < 0) {
- PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
- return;
- }
- PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
- sleep(1);
- close_audio_file(&afd);
- }
-}
-#endif
-
-
static enum play_mode init_admissible_files(void)
{
int ret;
- char *given_mood, *given_playlist;
- given_mood = "mood_that_was_given_at_the_command_line";
- given_playlist = "given_playlist";
-
- if (given_mood) {
- ret = change_current_mood(given_mood);
+ if (conf.mood_given) {
+ ret = change_current_mood(conf.mood_arg);
if (ret >= 0) {
- if (given_playlist)
+ if (conf.playlist_given)
PARA_WARNING_LOG("ignoring playlist %s\n",
- given_playlist);
+ conf.playlist_arg);
return PLAY_MODE_MOOD;
}
}
- if (given_playlist) {
- ret = playlist_open(given_playlist);
+ if (conf.playlist_given) {
+ ret = playlist_open(conf.playlist_arg);
if (ret >= 0)
return PLAY_MODE_PLAYLIST;
}
return ret;
}
-static int server_socket;
-static struct command_task command_task_struct;
-static struct signal_task signal_task_struct;
-
-static void unregister_tasks(void)
-{
- unregister_task(&command_task_struct.task);
- unregister_task(&signal_task_struct.task);
-}
-
static void close_afs_tables(enum osl_close_flags flags)
{
PARA_NOTICE_LOG("closing afs_tables\n");
aft_shutdown(flags);
}
+static char *database_dir;
+
+static int make_database_dir(void)
+{
+ int ret;
+
+ if (!database_dir) {
+ if (conf.afs_database_dir_given)
+ database_dir = para_strdup(conf.afs_database_dir_arg);
+ else {
+ char *home = para_homedir();
+ database_dir = make_message(
+ "%s/.paraslash/afs_database", home);
+ free(home);
+ }
+ }
+ PARA_INFO_LOG("afs_database dir %s\n", database_dir);
+ ret = para_mkdir(database_dir, 0777);
+ if (ret >= 0 || is_errno(-ret, EEXIST))
+ return 1;
+ free(database_dir);
+ database_dir = NULL;
+ return ret;
+}
+
+
+static int open_afs_tables(void)
+{
+ int ret = make_database_dir();
+
+ if (ret < 0)
+ return ret;
+ ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES], database_dir);
+ if (ret < 0)
+ return ret;
+ ret = moods_init(&afs_tables[TBLNUM_MOODS], database_dir);
+ if (ret < 0)
+ goto moods_init_error;
+ ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST], database_dir);
+ if (ret < 0)
+ goto playlists_init_error;
+ ret = lyrics_init(&afs_tables[TBLNUM_LYRICS], database_dir);
+ if (ret < 0)
+ goto lyrics_init_error;
+ ret = images_init(&afs_tables[TBLNUM_IMAGES], database_dir);
+ if (ret < 0)
+ goto images_init_error;
+ ret = score_init(&afs_tables[TBLNUM_SCORES], database_dir);
+ if (ret < 0)
+ goto score_init_error;
+ ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES], database_dir);
+ if (ret < 0)
+ goto aft_init_error;
+ return 1;
+
+aft_init_error:
+ score_shutdown(OSL_MARK_CLEAN);
+score_init_error:
+ images_shutdown(OSL_MARK_CLEAN);
+images_init_error:
+ lyrics_shutdown(OSL_MARK_CLEAN);
+lyrics_init_error:
+ playlists_shutdown(OSL_MARK_CLEAN);
+playlists_init_error:
+ moods_shutdown(OSL_MARK_CLEAN);
+moods_init_error:
+ attribute_shutdown(OSL_MARK_CLEAN);
+ return ret;
+}
+
+static int server_socket;
+static struct command_task command_task_struct;
+static struct signal_task signal_task_struct;
+
+static void unregister_tasks(void)
+{
+ unregister_task(&command_task_struct.task);
+ unregister_task(&signal_task_struct.task);
+}
+
static void signal_pre_select(struct sched *s, struct task *t)
{
struct signal_task *st = t->private_data;
t->ret = 1;
if (st->signum == SIGUSR1)
return; /* ignore SIGUSR1 */
+ if (st->signum == SIGHUP) {
+ close_afs_tables(OSL_MARK_CLEAN);
+ t->ret = open_afs_tables();
+ return;
+ }
PARA_NOTICE_LOG("caught signal %d\n", st->signum);
- t->ret = -E_SIGNAL_CAUGHT;
+ t->ret = -E_AFS_SIGNAL;
unregister_tasks();
}
para_install_sighandler(SIGINT);
para_install_sighandler(SIGTERM);
para_install_sighandler(SIGPIPE);
+ para_install_sighandler(SIGHUP);
st->task.pre_select = signal_pre_select;
st->task.post_select = signal_post_select;
register_task(&st->task);
}
+static struct list_head afs_client_list;
+
+struct afs_client {
+ struct list_head node;
+ int fd;
+ struct timeval connect_time;
+};
+
static void command_pre_select(struct sched *s, struct task *t)
{
struct command_task *ct = t->private_data;
- t->ret = 1;
+ struct afs_client *client;
+
para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
+ list_for_each_entry(client, &afs_client_list, node)
+ para_fd_set(client->fd, &s->rfds, &s->max_fileno);
+ t->ret = 1;
}
/*
return ret;
}
-static void command_post_select(struct sched *s, struct task *t)
+static void execute_afs_command(int fd, uint32_t expected_cookie)
{
- struct command_task *ct = t->private_data;
- struct sockaddr_un unix_addr;
- char buf[sizeof(uint32_t) + sizeof(int)];
uint32_t cookie;
- int query_shmid, fd;
+ int query_shmid;
+ char buf[sizeof(cookie) + sizeof(query_shmid)];
+ int ret = recv_bin_buffer(fd, buf, sizeof(buf));
- t->ret = 1;
- if (!FD_ISSET(ct->fd, &s->rfds))
- return;
- t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
- if (t->ret < 0)
+ if (ret < 0) {
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret));
return;
- /*
- * The following errors may be caused by a malicious local user. So do
- * not return an error in this case as this would terminate para_afs
- * and para_server.
- */
- fd = t->ret;
- /* FIXME: This is easily dosable (peer doesn't send data) */
- t->ret = recv_bin_buffer(fd, buf, sizeof(buf));
- if (t->ret < 0) {
- PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret);
- goto out;
}
- if (t->ret != sizeof(buf)) {
+ if (ret != sizeof(buf)) {
PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
- t->ret, (long unsigned) sizeof(buf));
- goto out;
+ ret, (long unsigned) sizeof(buf));
+ return;
}
cookie = *(uint32_t *)buf;
- if (cookie != ct->cookie) {
+ if (cookie != expected_cookie) {
PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
- (unsigned)cookie, (unsigned)ct->cookie);
- goto out;
+ (unsigned)cookie, (unsigned)expected_cookie);
+ return;
}
query_shmid = *(int *)(buf + sizeof(cookie));
if (query_shmid < 0) {
PARA_WARNING_LOG("received invalid query shmid %d)\n",
query_shmid);
- goto out;
+ return;
}
- /* Ignore return value: Errors might be ok here. */
+ /* Ignore return value: Errors might be OK here. */
call_callback(fd, query_shmid);
+}
+
+/** Shutdown connection if query has not arrived until this many seconds. */
+#define AFS_CLIENT_TIMEOUT 3
+
+static void command_post_select(struct sched *s, struct task *t)
+{
+ struct command_task *ct = t->private_data;
+ struct sockaddr_un unix_addr;
+ struct afs_client *client, *tmp;
+
+ /* First, check the list of connected clients. */
+ list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
+ if (FD_ISSET(client->fd, &s->rfds))
+ execute_afs_command(client->fd, ct->cookie);
+ else { /* prevent bogus connection flooding */
+ struct timeval diff;
+ tv_diff(now, &client->connect_time, &diff);
+ if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
+ continue;
+ PARA_WARNING_LOG("connection timeout\n");
+ }
+ close(client->fd);
+ list_del(&client->node);
+ free(client);
+ }
+ /* Next, accept connections on the local socket. */
+ if (!FD_ISSET(ct->fd, &s->rfds))
+ goto out;
+ t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
+ if (t->ret < 0) {
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+ goto out;
+ }
+ client = para_malloc(sizeof(*client));
+ client->fd = t->ret;
+ client->connect_time = *now;
+ para_list_add(&client->node, &afs_client_list);
out:
t->ret = 1;
- close(fd);
}
static void register_command_task(uint32_t cookie)
register_task(&ct->task);
}
-void register_tasks(uint32_t cookie)
+static void register_tasks(uint32_t cookie)
{
register_signal_task();
register_command_task(cookie);
}
-static char *database_dir;
-
-static int make_database_dir(void)
-{
- int ret;
-
- if (!database_dir) {
- if (conf.afs_database_dir_given)
- database_dir = para_strdup(conf.afs_database_dir_arg);
- else {
- char *home = para_homedir();
- database_dir = make_message(
- "%s/.paraslash/afs_database", home);
- free(home);
- }
- }
- PARA_INFO_LOG("afs_database dir %s\n", database_dir);
- ret = para_mkdir(database_dir, 0777);
- if (ret >= 0 || ret == -E_EXIST)
- return 1;
- free(database_dir);
- database_dir = NULL;
- return ret;
-}
-
-static int open_afs_tables(void)
-{
- int ret = make_database_dir();
-
- if (ret < 0)
- return ret;
- ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES], database_dir);
- if (ret < 0)
- return ret;
- ret = moods_init(&afs_tables[TBLNUM_MOODS], database_dir);
- if (ret < 0)
- goto moods_init_error;
- ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST], database_dir);
- if (ret < 0)
- goto playlists_init_error;
- ret = lyrics_init(&afs_tables[TBLNUM_LYRICS], database_dir);
- if (ret < 0)
- goto lyrics_init_error;
- ret = images_init(&afs_tables[TBLNUM_IMAGES], database_dir);
- if (ret < 0)
- goto images_init_error;
- ret = score_init(&afs_tables[TBLNUM_SCORES], database_dir);
- if (ret < 0)
- goto score_init_error;
- ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES], database_dir);
- if (ret < 0)
- goto aft_init_error;
- return 1;
-
-aft_init_error:
- score_shutdown(OSL_MARK_CLEAN);
-score_init_error:
- images_shutdown(OSL_MARK_CLEAN);
-images_init_error:
- lyrics_shutdown(OSL_MARK_CLEAN);
-lyrics_init_error:
- playlists_shutdown(OSL_MARK_CLEAN);
-playlists_init_error:
- moods_shutdown(OSL_MARK_CLEAN);
-moods_init_error:
- attribute_shutdown(OSL_MARK_CLEAN);
- return ret;
-}
-
-__noreturn int afs_init(uint32_t cookie, int socket_fd)
+/**
+ * Initialize the audio file selector process.
+ *
+ * \param cookie The value used for "authentication".
+ * \param socket_fd File descriptor used for communication with the server.
+ */
+__noreturn void afs_init(uint32_t cookie, int socket_fd)
{
enum play_mode current_play_mode;
struct sched s;
- int ret = open_afs_tables();
+ int ret;
+
+ INIT_LIST_HEAD(&afs_client_list);
+ ret = open_afs_tables();
if (ret < 0) {
PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
return send_va_buffer(fd, "successfully created afs table(s)\n");
}
+/**
+ * Flags for the check command.
+ *
+ * \sa com_check().
+ */
enum com_check_flags {
+ /** Check the audio file table. */
CHECK_AFT = 1,
+ /** Check the mood table. */
CHECK_MOODS = 2,
+ /** Check the playlist table. */
CHECK_PLAYLISTS = 4
};