2 * Copyright (C) 2007-2008 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file afs.c Paraslash's audio file selector. */
11 #include "server.cmdline.h"
18 #include <dirent.h> /* readdir() */
28 /** The osl tables used by afs. \sa blob.c. */
30 /** Contains audio file information. See aft.c. */
32 /** The table for the paraslash attributes. See attribute.c. */
35 * Paraslash's scoring system is based on Gaussian normal
36 * distributions, and the relevant data is stored in the rbtrees of an
37 * osl table containing only volatile columns. See score.c for
42 * A standard blob table containing the mood definitions. For details
46 /** A blob table containing lyrics on a per-song basis. */
48 /** Another blob table for images (for example album cover art). */
50 /** Yet another blob table for storing standard playlists. */
52 /** How many tables are in use? */
56 static struct afs_table afs_tables[NUM_AFS_TABLES] = {
57 [TBLNUM_AUDIO_FILES] = {.init = aft_init},
58 [TBLNUM_ATTRIBUTES] = {.init = attribute_init},
59 [TBLNUM_SCORES] = {.init = score_init},
60 [TBLNUM_MOODS] = {.init = moods_init},
61 [TBLNUM_LYRICS] = {.init = lyrics_init},
62 [TBLNUM_IMAGES] = {.init = images_init},
63 [TBLNUM_PLAYLIST] = {.init = playlists_init},
67 /** The file descriptor for the local socket. */
70 * Value sent by the command handlers to identify themselves as
71 * children of the running para_server.
74 /** The associated task structure. */
78 extern struct misc_meta_data *mmd;
80 static int server_socket;
81 static struct command_task command_task_struct;
82 static struct signal_task signal_task_struct;
84 static enum play_mode current_play_mode;
85 static char *current_mop; /* mode or playlist specifier. NULL means dummy mooe */
89 * A random number used to "authenticate" the connection.
91 * para_server picks this number by random before forking the afs process. The
92 * command handlers write this number together with the id of the shared memory
93 * area containing the query. This way, a malicious local user has to know this
94 * number to be able to cause the afs process to crash by sending fake queries.
96 extern uint32_t afs_socket_cookie;
99 * Struct to let command handlers execute a callback in afs context.
101 * Commands that need to change the state of afs can't change the relevant data
102 * structures directly because commands are executed in a child process, i.e.
103 * they get their own virtual address space.
105 * This structure is used by \p send_callback_request() (executed from handler
106 * context) in order to let the afs process call the specified function. An
107 * instance of that structure is written to a shared memory area together with
108 * the arguments to the callback function. The identifier of the shared memory
109 * area is written to the command socket.
111 * The afs process accepts connections on the command socket and reads the
112 * shared memory id, attaches the corresponing area, calls the given handler to
113 * perform the desired action and to optionally compute a result.
115 * The result and a \p callback_result structure is then written to another
116 * shared memory area. The identifier for that area is written to the handler's
117 * command socket, so that the handler process can read the id, attach the
118 * shared memory area and use the result.
120 * \sa struct callback_result.
122 struct callback_query {
123 /** The function to be called. */
124 callback_function *handler;
125 /** The number of bytes of the query */
130 * Structure embedded in the result of a callback.
132 * If the callback produced a result, an instance of that structure is embeeded
133 * into the shared memory area holding the result, mainly to let the command
134 * handler know the size of the result.
136 * \sa struct callback_query.
138 struct callback_result {
139 /** The number of bytes of the result. */
144 * Ask the afs process to call a given function.
146 * \param f The function to be called.
147 * \param query Pointer to arbitrary data for the callback.
148 * \param result Callback result will be stored here.
150 * This function creates a shared memory area, copies the buffer pointed to by
151 * query to that area and notifies the afs process that \a f should be
154 * \return Negative, on errors, the return value of the callback function
157 * \sa send_option_arg_callback_request(), send_standard_callback_request().
159 int send_callback_request(callback_function *f, struct osl_object *query,
160 struct osl_object *result)
162 struct callback_query *cq;
163 struct callback_result *cr;
164 int ret, fd = -1, query_shmid, result_shmid;
165 void *query_shm, *result_shm;
166 char buf[sizeof(afs_socket_cookie) + sizeof(int)];
167 size_t query_shm_size = sizeof(*cq);
170 query_shm_size += query->size;
171 ret = shm_new(query_shm_size);
175 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
180 cq->query_size = query_shm_size - sizeof(*cq);
183 memcpy(query_shm + sizeof(*cq), query->data, query->size);
184 ret = shm_detach(query_shm);
188 *(uint32_t *) buf = afs_socket_cookie;
189 *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid;
191 ret = create_remote_socket(conf.afs_socket_arg);
195 ret = send_bin_buffer(fd, buf, sizeof(buf));
198 ret = recv_bin_buffer(fd, buf, sizeof(buf));
201 if (ret != sizeof(int)) {
202 ret = -E_AFS_SHORT_READ;
209 ret = shm_attach(result_shmid, ATTACH_RO, &result_shm);
213 result->size = cr->result_size;
214 result->data = para_malloc(result->size);
215 memcpy(result->data, result_shm + sizeof(*cr), result->size);
216 ret = shm_detach(result_shm);
218 PARA_ERROR_LOG("can not detach result\n");
220 PARA_ERROR_LOG("attach result failed: %d\n", ret);
221 if (shm_destroy(result_shmid) < 0)
222 PARA_ERROR_LOG("destroy result failed\n");
225 if (shm_destroy(query_shmid) < 0)
226 PARA_ERROR_LOG("%s\n", "shm destroy error");
229 // PARA_DEBUG_LOG("callback_ret: %d\n", ret);
234 * Send a callback request passing an options structure and an argument vector.
236 * \param options pointer to an arbitrary data structure.
237 * \param argc Argument count.
238 * \param argv Standard argument vector.
239 * \param f The callback function.
240 * \param result The result of the query is stored here.
242 * Some commands have a couple of options that are parsed in child context for
243 * syntactic correctness and are stored in a special options structure for that
244 * command. This function allows to pass such a structure together with a list
245 * of further arguments (often a list of audio files) to the parent process.
247 * \sa send_standard_callback_request(), send_callback_request().
249 int send_option_arg_callback_request(struct osl_object *options,
250 int argc, char * const * const argv, callback_function *f,
251 struct osl_object *result)
255 struct osl_object query = {.size = options? options->size : 0};
257 for (i = 0; i < argc; i++)
258 query.size += strlen(argv[i]) + 1;
259 query.data = para_malloc(query.size);
262 memcpy(query.data, options->data, options->size);
265 for (i = 0; i < argc; i++) {
266 strcpy(p, argv[i]); /* OK */
267 p += strlen(argv[i]) + 1;
269 ret = send_callback_request(f, &query, result);
275 * Send a callback request with an argument vector only.
277 * \param argc The same meaning as in send_option_arg_callback_request().
278 * \param argv The same meaning as in send_option_arg_callback_request().
279 * \param f The same meaning as in send_option_arg_callback_request().
280 * \param result The same meaning as in send_option_arg_callback_request().
282 * This is similar to send_option_arg_callback_request(), but no options buffer
283 * is passed to the parent process.
285 * \return The return value of the underlying call to
286 * send_option_arg_callback_request().
288 int send_standard_callback_request(int argc, char * const * const argv,
289 callback_function *f, struct osl_object *result)
291 return send_option_arg_callback_request(NULL, argc, argv, f, result);
294 static int action_if_pattern_matches(struct osl_row *row, void *data)
296 struct pattern_match_data *pmd = data;
297 struct osl_object name_obj;
298 const char *p, *name;
299 int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj);
300 const char *pattern_txt = (const char *)pmd->patterns.data;
304 name = (char *)name_obj.data;
305 if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
307 if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING))
308 return pmd->action(pmd->table, row, name, pmd->data);
309 for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
310 p += strlen(p) + 1) {
311 ret = fnmatch(p, name, pmd->fnmatch_flags);
312 if (ret == FNM_NOMATCH)
316 return pmd->action(pmd->table, row, name, pmd->data);
322 * Execute the given function for each matching row.
324 * \param pmd Describes what to match and how.
326 * \return The return value of the underlying call to osl_rbtree_loop()
327 * or osl_rbtree_loop_reverse().
329 int for_each_matching_row(struct pattern_match_data *pmd)
331 if (pmd->pm_flags & PM_REVERSE_LOOP)
332 return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
333 action_if_pattern_matches);
334 return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
335 action_if_pattern_matches);
339 * Compare two osl objects of string type.
341 * \param obj1 Pointer to the first object.
342 * \param obj2 Pointer to the second object.
344 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
345 * are taken into account.
347 * \return It returns an integer less than, equal to, or greater than zero if
348 * \a obj1 is found, respectively, to be less than, to match, or be greater than
351 * \sa strcmp(3), strncmp(3), osl_compare_func.
353 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
355 const char *str1 = (const char *)obj1->data;
356 const char *str2 = (const char *)obj2->data;
357 return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
361 * write input from fd to dynamically allocated buffer,
362 * but maximal max_size byte.
364 static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
366 const size_t chunk_size = 1024;
367 size_t size = 2048, received = 0;
369 char *buf = para_malloc(size);
372 ret = recv_bin_buffer(fd, buf + received, chunk_size);
376 if (received + chunk_size >= size) {
378 ret = -E_INPUT_TOO_LARGE;
381 buf = para_realloc(buf, size);
385 obj->size = received;
392 * Read data from a file descriptor, and send it to the afs process.
394 * \param fd File descriptor to read data from.
395 * \param arg_obj Pointer to the arguments to \a f.
396 * \param f The callback function.
397 * \param max_len Don't read more than that many bytes from stdin.
398 * \param result The result of the query is stored here.
400 * This function is used by commands that wish to let para_server store
401 * arbitrary data specified by the user (for instance the add_blob family of
402 * commands). First, at most \a max_len bytes are read from \a fd, the result
403 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
404 * is made available to the parent process via shared memory.
406 * \return Negative on errors, the return value of the underlying call to
407 * send_callback_request() otherwise.
409 int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
410 unsigned max_len, struct osl_object *result)
412 struct osl_object query, stdin_obj;
415 ret = send_buffer(fd, AWAITING_DATA_MSG);
418 ret = fd2buf(fd, max_len, &stdin_obj);
421 query.size = arg_obj->size + stdin_obj.size;
422 query.data = para_malloc(query.size);
423 memcpy(query.data, arg_obj->data, arg_obj->size);
424 memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
425 free(stdin_obj.data);
426 ret = send_callback_request(f, &query, result);
431 static int pass_afd(int fd, char *buf, size_t size)
433 struct msghdr msg = {.msg_iov = NULL};
434 struct cmsghdr *cmsg;
445 msg.msg_control = control;
446 msg.msg_controllen = sizeof(control);
448 cmsg = CMSG_FIRSTHDR(&msg);
449 cmsg->cmsg_level = SOL_SOCKET;
450 cmsg->cmsg_type = SCM_RIGHTS;
451 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
452 *(int *)CMSG_DATA(cmsg) = fd;
454 /* Sum of the length of all control messages in the buffer */
455 msg.msg_controllen = cmsg->cmsg_len;
456 PARA_DEBUG_LOG("passing %zu bytes and fd %d\n", size, fd);
457 ret = sendmsg(server_socket, &msg, 0);
459 ret = -ERRNO_TO_PARA_ERROR(errno);
466 * Open the audio file with highest score.
468 * This stores all information for streaming the "best" audio file in a shared
469 * memory area. The id of that area and an open file descriptor for the next
470 * audio file are passed to the server process.
474 * \sa open_and_update_audio_file().
476 int open_next_audio_file(void)
478 struct osl_row *aft_row;
479 struct audio_file_data afd;
484 PARA_NOTICE_LOG("getting next audio file\n");
485 ret = score_get_best(&aft_row, &score);
487 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
488 goto no_admissible_files;
490 ret = open_and_update_audio_file(aft_row, score, &afd);
492 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
493 ret = score_delete(aft_row);
495 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
496 goto no_admissible_files;
501 if (!write_ok(server_socket)) {
505 *(uint32_t *)buf = NEXT_AUDIO_FILE;
506 *(uint32_t *)(buf + 4) = (uint32_t)shmid;
507 ret = pass_afd(afd.fd, buf, 8);
515 *(uint32_t *)buf = NO_ADMISSIBLE_FILES;
516 *(uint32_t *)(buf + 4) = (uint32_t)0;
517 return send_bin_buffer(server_socket, buf, 8);
520 /* Never fails if arg == NULL */
521 static int activate_mood_or_playlist(char *arg, int *num_admissible)
527 ret = change_current_mood(NULL); /* always successful */
528 mode = PLAY_MODE_MOOD;
530 if (!strncmp(arg, "p/", 2)) {
531 ret = playlist_open(arg + 2);
532 mode = PLAY_MODE_PLAYLIST;
533 } else if (!strncmp(arg, "m/", 2)) {
534 ret = change_current_mood(arg + 2);
535 mode = PLAY_MODE_MOOD;
537 return -E_AFS_SYNTAX;
542 *num_admissible = ret;
543 current_play_mode = mode;
544 if (arg != current_mop) {
547 current_mop = para_strdup(arg);
549 strncpy(mmd->afs_mode_string, arg,
550 sizeof(mmd->afs_mode_string));
551 mmd->afs_mode_string[sizeof(mmd->afs_mode_string) - 1] = '\0';
555 strcpy(mmd->afs_mode_string, "dummy");
563 static int com_select_callback(const struct osl_object *query,
564 struct osl_object *result)
566 struct para_buffer pb = {.buf = NULL};
567 char *arg = query->data;
568 int num_admissible, ret;
570 ret = clear_score_table();
573 if (current_play_mode == PLAY_MODE_MOOD)
574 close_current_mood();
577 ret = activate_mood_or_playlist(arg, &num_admissible);
579 para_printf(&pb, "%s\n", para_strerror(-ret));
580 para_printf(&pb, "switching back to %s\n", current_mop?
581 current_mop : "dummy");
582 ret = activate_mood_or_playlist(current_mop, &num_admissible);
584 para_printf(&pb, "failed, switching to dummy\n");
585 activate_mood_or_playlist(NULL, &num_admissible);
588 para_printf(&pb, "activated %s (%d admissible files)\n", current_mop?
589 current_mop : "dummy mood", num_admissible);
590 result->data = pb.buf;
591 result->size = pb.size;
595 int com_select(int fd, int argc, char * const * const argv)
598 struct osl_object query, result;
601 return -E_AFS_SYNTAX;
602 query.data = argv[1];
603 query.size = strlen(argv[1]) + 1;
604 ret = send_callback_request(com_select_callback, &query,
606 if (ret > 0 && result.data && result.size) {
607 ret = send_va_buffer(fd, "%s", (char *)result.data);
613 static void init_admissible_files(char *arg)
615 if (activate_mood_or_playlist(arg, NULL) < 0)
616 activate_mood_or_playlist(NULL, NULL); /* always successful */
619 static int setup_command_socket_or_die(void)
622 char *socket_name = conf.afs_socket_arg;
623 struct sockaddr_un unix_addr;
626 ret = create_local_socket(socket_name, &unix_addr,
627 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
629 PARA_EMERG_LOG("%s: %s\n", para_strerror(-ret), socket_name);
633 if (listen(socket_fd , 5) < 0) {
634 PARA_EMERG_LOG("can not listen on socket\n");
637 ret = mark_fd_nonblocking(socket_fd);
642 PARA_INFO_LOG("listening on socket %s (fd %d)\n", socket_name, ret);
646 static void close_afs_tables(void)
649 PARA_NOTICE_LOG("closing afs_tables\n");
650 for (i = 0; i < NUM_AFS_TABLES; i++)
651 afs_tables[i].close();
654 static char *database_dir;
656 static void get_database_dir(void)
659 if (conf.afs_database_dir_given)
660 database_dir = para_strdup(conf.afs_database_dir_arg);
662 char *home = para_homedir();
663 database_dir = make_message(
664 "%s/.paraslash/afs_database", home);
668 PARA_INFO_LOG("afs_database dir %s\n", database_dir);
671 static int make_database_dir(void)
676 ret = para_mkdir(database_dir, 0777);
677 if (ret >= 0 || is_errno(-ret, EEXIST))
682 static int open_afs_tables(void)
687 PARA_NOTICE_LOG("opening %u osl tables in %s\n", NUM_AFS_TABLES,
689 for (i = 0; i < NUM_AFS_TABLES; i++) {
690 ret = afs_tables[i].open(database_dir);
693 PARA_ERROR_LOG("%s init: %s\n", afs_tables[i].name,
694 para_strerror(-ret));
700 afs_tables[--i].close();
704 static void unregister_tasks(void)
706 unregister_task(&command_task_struct.task);
707 unregister_task(&signal_task_struct.task);
710 static void signal_pre_select(struct sched *s, struct task *t)
712 struct signal_task *st = t->private_data;
714 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
717 static void signal_post_select(struct sched *s, struct task *t)
719 struct signal_task *st = t->private_data;
720 t->ret = -E_AFS_PARENT_DIED;
724 if (!FD_ISSET(st->fd, &s->rfds))
726 st->signum = para_next_signal();
728 if (st->signum == SIGUSR1)
729 return; /* ignore SIGUSR1 */
730 if (st->signum == SIGHUP) {
732 t->ret = open_afs_tables();
735 init_admissible_files(current_mop);
738 t->ret = -E_AFS_SIGNAL;
740 PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
744 static void register_signal_task(void)
746 struct signal_task *st = &signal_task_struct;
747 st->fd = para_signal_init();
748 PARA_INFO_LOG("signal pipe: fd %d\n", st->fd);
749 para_install_sighandler(SIGINT);
750 para_install_sighandler(SIGTERM);
751 para_install_sighandler(SIGPIPE);
752 para_install_sighandler(SIGHUP);
754 st->task.pre_select = signal_pre_select;
755 st->task.post_select = signal_post_select;
756 st->task.private_data = st;
757 sprintf(st->task.status, "signal task");
758 register_task(&st->task);
761 static struct list_head afs_client_list;
763 /** Describes on connected afs client. */
765 /** Position in the afs client list. */
766 struct list_head node;
767 /** The socket file descriptor for this client. */
769 /** The time the client connected. */
770 struct timeval connect_time;
773 static void command_pre_select(struct sched *s, struct task *t)
775 struct command_task *ct = t->private_data;
776 struct afs_client *client;
778 para_fd_set(server_socket, &s->rfds, &s->max_fileno);
779 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
780 list_for_each_entry(client, &afs_client_list, node)
781 para_fd_set(client->fd, &s->rfds, &s->max_fileno);
786 * On errors, negative value is written to fd.
787 * On success: If query produced a result, the result_shmid is written to fd.
788 * Otherwise, zero is written.
790 static int call_callback(int fd, int query_shmid)
792 void *query_shm, *result_shm;
793 struct callback_query *cq;
794 struct callback_result *cr;
795 struct osl_object query, result = {.data = NULL};
796 int result_shmid = -1, ret, ret2;
798 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
802 query.data = (char *)query_shm + sizeof(*cq);
803 query.size = cq->query_size;
804 ret = cq->handler(&query, &result);
805 ret2 = shm_detach(query_shm);
806 if (ret2 < 0 && ret >= 0)
811 if (!result.data || !result.size)
813 ret = shm_new(result.size + sizeof(struct callback_result));
817 ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
821 cr->result_size = result.size;
822 memcpy(result_shm + sizeof(*cr), result.data, result.size);
823 ret = shm_detach(result_shm);
829 ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
830 if (ret < 0 || ret2 < 0) {
831 if (result_shmid >= 0)
832 if (shm_destroy(result_shmid) < 0)
833 PARA_ERROR_LOG("destroy result failed\n");
840 static void execute_server_command(void)
843 int ret = recv_bin_buffer(server_socket, buf, sizeof(buf) - 1);
847 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
851 PARA_DEBUG_LOG("received: %s\n", buf);
852 if (!strcmp(buf, "new")) {
853 ret = open_next_audio_file();
855 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
860 PARA_ERROR_LOG("unknown command\n");
864 static void execute_afs_command(int fd, uint32_t expected_cookie)
868 char buf[sizeof(cookie) + sizeof(query_shmid)];
869 int ret = recv_bin_buffer(fd, buf, sizeof(buf));
872 PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
875 if (ret != sizeof(buf)) {
876 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
877 ret, (long unsigned) sizeof(buf));
880 cookie = *(uint32_t *)buf;
881 if (cookie != expected_cookie) {
882 PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
883 (unsigned)cookie, (unsigned)expected_cookie);
886 query_shmid = *(int *)(buf + sizeof(cookie));
887 if (query_shmid < 0) {
888 PARA_WARNING_LOG("received invalid query shmid %d)\n",
892 /* Ignore return value: Errors might be OK here. */
893 call_callback(fd, query_shmid);
896 /** Shutdown connection if query has not arrived until this many seconds. */
897 #define AFS_CLIENT_TIMEOUT 3
899 static void command_post_select(struct sched *s, struct task *t)
901 struct command_task *ct = t->private_data;
902 struct sockaddr_un unix_addr;
903 struct afs_client *client, *tmp;
905 if (FD_ISSET(server_socket, &s->rfds))
906 execute_server_command();
908 /* Check the list of connected clients. */
909 list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
910 if (FD_ISSET(client->fd, &s->rfds))
911 execute_afs_command(client->fd, ct->cookie);
912 else { /* prevent bogus connection flooding */
914 tv_diff(now, &client->connect_time, &diff);
915 if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
917 PARA_WARNING_LOG("connection timeout\n");
920 list_del(&client->node);
923 /* Accept connections on the local socket. */
924 if (!FD_ISSET(ct->fd, &s->rfds))
926 t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
928 PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
932 t->ret = mark_fd_nonblocking(fd);
934 PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
938 client = para_malloc(sizeof(*client));
940 client->connect_time = *now;
941 para_list_add(&client->node, &afs_client_list);
946 static void register_command_task(uint32_t cookie)
948 struct command_task *ct = &command_task_struct;
949 ct->fd = setup_command_socket_or_die();
952 ct->task.pre_select = command_pre_select;
953 ct->task.post_select = command_post_select;
954 ct->task.private_data = ct;
955 sprintf(ct->task.status, "command task");
956 register_task(&ct->task);
959 static void register_tasks(uint32_t cookie)
961 register_signal_task();
962 register_command_task(cookie);
966 * Initialize the audio file selector process.
968 * \param cookie The value used for "authentication".
969 * \param socket_fd File descriptor used for communication with the server.
971 __noreturn void afs_init(uint32_t cookie, int socket_fd)
976 INIT_LIST_HEAD(&afs_client_list);
977 for (i = 0; i < NUM_AFS_TABLES; i++)
978 afs_tables[i].init(&afs_tables[i]);
979 ret = open_afs_tables();
982 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
985 server_socket = socket_fd;
986 ret = mark_fd_nonblocking(server_socket);
989 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
990 server_socket, (unsigned) cookie);
991 init_admissible_files(conf.afs_initial_mode_arg);
992 register_tasks(cookie);
993 s.default_timeout.tv_sec = 0;
994 s.default_timeout.tv_usec = 999 * 1000;
997 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1002 static int create_tables_callback(const struct osl_object *query,
1003 __a_unused struct osl_object *result)
1005 uint32_t table_mask = *(uint32_t *)query->data;
1009 for (i = 0; i < NUM_AFS_TABLES; i++) {
1010 struct afs_table *t = &afs_tables[i];
1012 if (!(table_mask & (1 << i)))
1016 ret = t->create(database_dir);
1020 ret = open_afs_tables();
1021 return ret < 0? ret: 0;
1024 int com_init(int fd, int argc, char * const * const argv)
1027 uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
1028 struct osl_object query = {.data = &table_mask,
1029 .size = sizeof(table_mask)};
1031 ret = make_database_dir();
1036 for (i = 1; i < argc; i++) {
1037 for (j = 0; j < NUM_AFS_TABLES; j++) {
1038 struct afs_table *t = &afs_tables[j];
1040 if (strcmp(argv[i], t->name))
1042 table_mask |= (1 << j);
1045 if (j == NUM_AFS_TABLES)
1046 return -E_BAD_TABLE_NAME;
1049 ret = send_callback_request(create_tables_callback, &query, NULL);
1052 return send_va_buffer(fd, "successfully created afs table(s)\n");
1056 * Flags for the check command.
1060 enum com_check_flags {
1061 /** Check the audio file table. */
1063 /** Check the mood table. */
1065 /** Check the playlist table. */
1069 int com_check(int fd, int argc, char * const * const argv)
1073 struct osl_object result;
1075 for (i = 1; i < argc; i++) {
1076 const char *arg = argv[i];
1079 if (!strcmp(arg, "--")) {
1083 if (!strcmp(arg, "-a")) {
1087 if (!strcmp(arg, "-p")) {
1088 flags |= CHECK_PLAYLISTS;
1091 if (!strcmp(arg, "-m")) {
1092 flags |= CHECK_MOODS;
1095 return -E_AFS_SYNTAX;
1098 return -E_AFS_SYNTAX;
1101 if (flags & CHECK_AFT) {
1102 ret = send_callback_request(aft_check_callback, NULL, &result);
1106 ret = send_buffer(fd, (char *) result.data);
1112 if (flags & CHECK_PLAYLISTS) {
1113 ret = send_callback_request(playlist_check_callback, NULL, &result);
1117 ret = send_buffer(fd, (char *) result.data);
1123 if (flags & CHECK_MOODS) {
1124 ret = send_callback_request(mood_check_callback, NULL, &result);
1128 ret = send_buffer(fd, (char *) result.data);
1137 void afs_event(enum afs_events event, struct para_buffer *pb,
1142 for (i = 0; i < NUM_AFS_TABLES; i++) {
1143 struct afs_table *t = &afs_tables[i];
1144 if (!t->event_handler)
1146 ret = t->event_handler(event, pb, data);
1148 PARA_CRIT_LOG("%s\n", para_strerror(-ret));
1152 int images_event_handler(__a_unused enum afs_events event,
1153 __a_unused struct para_buffer *pb, __a_unused void *data)
1158 int lyrics_event_handler(__a_unused enum afs_events event,
1159 __a_unused struct para_buffer *pb, __a_unused void *data)