2 * Copyright (C) 2007 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 struct sockaddr_un unix_addr;
168 size_t query_shm_size = sizeof(*cq);
171 query_shm_size += query->size;
172 ret = shm_new(query_shm_size);
176 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
181 cq->query_size = query_shm_size - sizeof(*cq);
184 memcpy(query_shm + sizeof(*cq), query->data, query->size);
185 ret = shm_detach(query_shm);
189 *(uint32_t *) buf = afs_socket_cookie;
190 *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid;
192 ret = get_stream_socket(PF_UNIX);
196 ret = init_unix_addr(&unix_addr, conf.afs_socket_arg);
199 ret = PARA_CONNECT(fd, &unix_addr);
202 ret = send_bin_buffer(fd, buf, sizeof(buf));
205 ret = recv_bin_buffer(fd, buf, sizeof(buf));
208 if (ret != sizeof(int)) {
216 ret = shm_attach(result_shmid, ATTACH_RO, &result_shm);
220 result->size = cr->result_size;
221 result->data = para_malloc(result->size);
222 memcpy(result->data, result_shm + sizeof(*cr), result->size);
223 ret = shm_detach(result_shm);
225 PARA_ERROR_LOG("can not detach result\n");
227 PARA_ERROR_LOG("attach result failed: %d\n", ret);
228 if (shm_destroy(result_shmid) < 0)
229 PARA_ERROR_LOG("destroy result failed\n");
232 if (shm_destroy(query_shmid) < 0)
233 PARA_ERROR_LOG("%s\n", "shm destroy error");
236 // PARA_DEBUG_LOG("callback_ret: %d\n", ret);
241 * Send a callback request passing an options structure and an argument vector.
243 * \param options pointer to an arbitrary data structure.
244 * \param argc Argument count.
245 * \param argv Standard argument vector.
246 * \param f The callback function.
247 * \param result The result of the query is stored here.
249 * Some commands have a couple of options that are parsed in child context for
250 * syntactic correctness and are stored in a special options structure for that
251 * command. This function allows to pass such a structure together with a list
252 * of further arguments (often a list of audio files) to the parent process.
254 * \sa send_standard_callback_request(), send_callback_request().
256 int send_option_arg_callback_request(struct osl_object *options,
257 int argc, char * const * const argv, callback_function *f,
258 struct osl_object *result)
262 struct osl_object query = {.size = options? options->size : 0};
264 for (i = 0; i < argc; i++)
265 query.size += strlen(argv[i]) + 1;
266 query.data = para_malloc(query.size);
269 memcpy(query.data, options->data, options->size);
272 for (i = 0; i < argc; i++) {
273 strcpy(p, argv[i]); /* OK */
274 p += strlen(argv[i]) + 1;
276 ret = send_callback_request(f, &query, result);
282 * Send a callback request with an argument vector only.
284 * \param argc The same meaning as in send_option_arg_callback_request().
285 * \param argv The same meaning as in send_option_arg_callback_request().
286 * \param f The same meaning as in send_option_arg_callback_request().
287 * \param result The same meaning as in send_option_arg_callback_request().
289 * This is similar to send_option_arg_callback_request(), but no options buffer
290 * is passed to the parent process.
292 * \return The return value of the underlying call to
293 * send_option_arg_callback_request().
295 int send_standard_callback_request(int argc, char * const * const argv,
296 callback_function *f, struct osl_object *result)
298 return send_option_arg_callback_request(NULL, argc, argv, f, result);
301 static int action_if_pattern_matches(struct osl_row *row, void *data)
303 struct pattern_match_data *pmd = data;
304 struct osl_object name_obj;
305 const char *p, *name;
306 int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj);
307 const char *pattern_txt = (const char *)pmd->patterns.data;
311 name = (char *)name_obj.data;
312 if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
314 if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING))
315 return pmd->action(pmd->table, row, name, pmd->data);
316 for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
317 p += strlen(p) + 1) {
318 ret = fnmatch(p, name, pmd->fnmatch_flags);
319 if (ret == FNM_NOMATCH)
323 return pmd->action(pmd->table, row, name, pmd->data);
329 * Execute the given function for each matching row.
331 * \param pmd Describes what to match and how.
333 * \return The return value of the underlying call to osl_rbtree_loop()
334 * or osl_rbtree_loop_reverse().
336 int for_each_matching_row(struct pattern_match_data *pmd)
338 if (pmd->pm_flags & PM_REVERSE_LOOP)
339 return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
340 action_if_pattern_matches);
341 return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
342 action_if_pattern_matches);
346 * Compare two osl objects of string type.
348 * \param obj1 Pointer to the first object.
349 * \param obj2 Pointer to the second object.
351 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
352 * are taken into account.
354 * \return It returns an integer less than, equal to, or greater than zero if
355 * \a obj1 is found, respectively, to be less than, to match, or be greater than
358 * \sa strcmp(3), strncmp(3), osl_compare_func.
360 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
362 const char *str1 = (const char *)obj1->data;
363 const char *str2 = (const char *)obj2->data;
364 return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
368 * write input from fd to dynamically allocated buffer,
369 * but maximal max_size byte.
371 static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
373 const size_t chunk_size = 1024;
374 size_t size = 2048, received = 0;
376 char *buf = para_malloc(size);
379 ret = recv_bin_buffer(fd, buf + received, chunk_size);
383 if (received + chunk_size >= size) {
385 ret = -E_INPUT_TOO_LARGE;
388 buf = para_realloc(buf, size);
392 obj->size = received;
399 * Read data from a file descriptor, and send it to the afs process.
401 * \param fd File descriptor to read data from.
402 * \param arg_obj Pointer to the arguments to \a f.
403 * \param f The callback function.
404 * \param max_len Don't read more than that many bytes from stdin.
405 * \param result The result of the query is stored here.
407 * This function is used by commands that wish to let para_server store
408 * arbitrary data specified by the user (for instance the add_blob family of
409 * commands). First, at most \a max_len bytes are read from \a fd, the result
410 * is concatenated with the buffer given by \a arg_obj, and the combined buffer
411 * is made available to the parent process via shared memory.
413 * \return Negative on errors, the return value of the underlying call to
414 * send_callback_request() otherwise.
416 int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
417 unsigned max_len, struct osl_object *result)
419 struct osl_object query, stdin_obj;
422 ret = send_buffer(fd, AWAITING_DATA_MSG);
425 ret = fd2buf(fd, max_len, &stdin_obj);
428 query.size = arg_obj->size + stdin_obj.size;
429 query.data = para_malloc(query.size);
430 memcpy(query.data, arg_obj->data, arg_obj->size);
431 memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
432 free(stdin_obj.data);
433 ret = send_callback_request(f, &query, result);
438 static int pass_afd(int fd, char *buf, size_t size)
440 struct msghdr msg = {.msg_iov = NULL};
441 struct cmsghdr *cmsg;
452 msg.msg_control = control;
453 msg.msg_controllen = sizeof(control);
455 cmsg = CMSG_FIRSTHDR(&msg);
456 cmsg->cmsg_level = SOL_SOCKET;
457 cmsg->cmsg_type = SCM_RIGHTS;
458 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
459 *(int *)CMSG_DATA(cmsg) = fd;
461 /* Sum of the length of all control messages in the buffer */
462 msg.msg_controllen = cmsg->cmsg_len;
463 PARA_DEBUG_LOG("passing %zu bytes and fd %d\n", size, fd);
464 ret = sendmsg(server_socket, &msg, 0);
466 ret = -ERRNO_TO_PARA_ERROR(errno);
473 * Open the audio file with highest score.
475 * This stores all information for streaming the "best" audio file in a shared
476 * memory area. The id of that area and an open file descriptor for the next
477 * audio file are passed to the server process.
481 * \sa open_and_update_audio_file().
483 int open_next_audio_file(void)
485 struct osl_row *aft_row;
486 struct audio_file_data afd;
491 PARA_NOTICE_LOG("getting next audio file\n");
492 ret = score_get_best(&aft_row, &score);
495 ret = open_and_update_audio_file(aft_row, &afd, score);
499 if (!write_ok(server_socket)) {
500 PARA_EMERG_LOG("afs_socket not writable\n");
503 *(uint32_t *)buf = NEXT_AUDIO_FILE;
504 *(uint32_t *)(buf + 4) = (uint32_t)shmid;
505 ret = pass_afd(afd.fd, buf, 8);
509 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
515 /* Never fails if arg == NULL */
516 static int activate_mood_or_playlist(char *arg, int *num_admissible)
522 ret = change_current_mood(NULL); /* always successful */
523 mode = PLAY_MODE_MOOD;
525 if (!strncmp(arg, "p:", 2)) {
526 ret = playlist_open(arg + 2);
527 mode = PLAY_MODE_PLAYLIST;
528 } else if (!strncmp(arg, "m:", 2)) {
529 ret = change_current_mood(arg + 2);
530 mode = PLAY_MODE_MOOD;
537 *num_admissible = ret;
538 current_play_mode = mode;
539 if (arg != current_mop) {
542 current_mop = para_strdup(arg);
544 strncpy(mmd->afs_mode_string, arg,
545 sizeof(mmd->afs_mode_string));
546 mmd->afs_mode_string[sizeof(mmd->afs_mode_string) - 1] = '\0';
550 strcpy(mmd->afs_mode_string, "dummy");
558 static int com_select_callback(const struct osl_object *query,
559 struct osl_object *result)
561 struct para_buffer pb = {.buf = NULL};
562 char *arg = query->data;
563 int num_admissible, ret;
565 ret = clear_score_table();
568 if (current_play_mode == PLAY_MODE_MOOD)
569 close_current_mood();
572 ret = activate_mood_or_playlist(arg, &num_admissible);
574 para_printf(&pb, "%s\n", PARA_STRERROR(-ret));
575 para_printf(&pb, "switching back to %s\n", current_mop?
576 current_mop : "dummy");
577 ret = activate_mood_or_playlist(current_mop, &num_admissible);
579 para_printf(&pb, "failed, switching to dummy\n");
580 activate_mood_or_playlist(NULL, &num_admissible);
583 para_printf(&pb, "activated %s (%d admissible files)\n", current_mop?
584 current_mop : "dummy mood", num_admissible);
585 result->data = pb.buf;
586 result->size = pb.size;
590 int com_select(int fd, int argc, char * const * const argv)
593 struct osl_object query, result;
596 return -E_AFS_SYNTAX;
597 query.data = argv[1];
598 query.size = strlen(argv[1]) + 1;
599 ret = send_callback_request(com_select_callback, &query,
601 if (ret > 0 && result.data && result.size) {
602 ret = send_va_buffer(fd, "%s", (char *)result.data);
608 static void init_admissible_files(char *arg)
610 if (activate_mood_or_playlist(arg, NULL) < 0)
611 activate_mood_or_playlist(NULL, NULL); /* always successful */
614 static int setup_command_socket_or_die(void)
617 char *socket_name = conf.afs_socket_arg;
618 struct sockaddr_un unix_addr;
621 ret = create_local_socket(socket_name, &unix_addr,
622 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
624 PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret), socket_name);
628 if (listen(socket_fd , 5) < 0) {
629 PARA_EMERG_LOG("can not listen on socket\n");
632 ret = mark_fd_nonblock(socket_fd);
637 PARA_INFO_LOG("listening on socket %s (fd %d)\n", socket_name, ret);
641 static void close_afs_tables(void)
644 PARA_NOTICE_LOG("closing afs_tables\n");
645 for (i = 0; i < NUM_AFS_TABLES; i++)
646 afs_tables[i].close();
649 static char *database_dir;
651 static void get_database_dir(void)
654 if (conf.afs_database_dir_given)
655 database_dir = para_strdup(conf.afs_database_dir_arg);
657 char *home = para_homedir();
658 database_dir = make_message(
659 "%s/.paraslash/afs_database", home);
663 PARA_INFO_LOG("afs_database dir %s\n", database_dir);
666 static int make_database_dir(void)
671 ret = para_mkdir(database_dir, 0777);
672 if (ret >= 0 || is_errno(-ret, EEXIST))
677 static int open_afs_tables(void)
682 PARA_NOTICE_LOG("opening %u osl tables in %s\n", NUM_AFS_TABLES,
684 for (i = 0; i < NUM_AFS_TABLES; i++) {
685 ret = afs_tables[i].open(database_dir);
688 PARA_ERROR_LOG("%s init: %s\n", afs_tables[i].name,
689 PARA_STRERROR(-ret));
695 afs_tables[--i].close();
699 static void unregister_tasks(void)
701 unregister_task(&command_task_struct.task);
702 unregister_task(&signal_task_struct.task);
705 static void signal_pre_select(struct sched *s, struct task *t)
707 struct signal_task *st = t->private_data;
709 para_fd_set(st->fd, &s->rfds, &s->max_fileno);
712 static void signal_post_select(struct sched *s, struct task *t)
714 struct signal_task *st = t->private_data;
715 t->ret = -E_AFS_PARENT_DIED;
719 if (!FD_ISSET(st->fd, &s->rfds))
721 st->signum = para_next_signal();
723 if (st->signum == SIGUSR1)
724 return; /* ignore SIGUSR1 */
725 if (st->signum == SIGHUP) {
727 t->ret = open_afs_tables();
730 init_admissible_files(current_mop);
733 t->ret = -E_AFS_SIGNAL;
735 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
739 static void register_signal_task(void)
741 struct signal_task *st = &signal_task_struct;
742 st->fd = para_signal_init();
743 PARA_INFO_LOG("signal pipe: fd %d\n", st->fd);
744 para_install_sighandler(SIGINT);
745 para_install_sighandler(SIGTERM);
746 para_install_sighandler(SIGPIPE);
747 para_install_sighandler(SIGHUP);
749 st->task.pre_select = signal_pre_select;
750 st->task.post_select = signal_post_select;
751 st->task.private_data = st;
752 sprintf(st->task.status, "signal task");
753 register_task(&st->task);
756 static struct list_head afs_client_list;
758 /** Describes on connected afs client. */
760 /** Position in the afs client list. */
761 struct list_head node;
762 /** The socket file descriptor for this client. */
764 /** The time the client connected. */
765 struct timeval connect_time;
768 static void command_pre_select(struct sched *s, struct task *t)
770 struct command_task *ct = t->private_data;
771 struct afs_client *client;
773 para_fd_set(server_socket, &s->rfds, &s->max_fileno);
774 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
775 list_for_each_entry(client, &afs_client_list, node)
776 para_fd_set(client->fd, &s->rfds, &s->max_fileno);
781 * On errors, negative value is written to fd.
782 * On success: If query produced a result, the result_shmid is written to fd.
783 * Otherwise, zero is written.
785 static int call_callback(int fd, int query_shmid)
787 void *query_shm, *result_shm;
788 struct callback_query *cq;
789 struct callback_result *cr;
790 struct osl_object query, result = {.data = NULL};
791 int result_shmid = -1, ret, ret2;
793 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
797 query.data = (char *)query_shm + sizeof(*cq);
798 query.size = cq->query_size;
799 ret = cq->handler(&query, &result);
800 ret2 = shm_detach(query_shm);
801 if (ret2 < 0 && ret >= 0)
806 if (!result.data || !result.size)
808 ret = shm_new(result.size + sizeof(struct callback_result));
812 ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
816 cr->result_size = result.size;
817 memcpy(result_shm + sizeof(*cr), result.data, result.size);
818 ret = shm_detach(result_shm);
824 ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
825 if (ret < 0 || ret2 < 0) {
826 if (result_shmid >= 0)
827 if (shm_destroy(result_shmid) < 0)
828 PARA_ERROR_LOG("destroy result failed\n");
835 static void execute_server_command(void)
838 int ret = recv_bin_buffer(server_socket, buf, sizeof(buf) - 1);
842 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
846 PARA_DEBUG_LOG("received: %s\n", buf);
847 if (!strcmp(buf, "new")) {
848 ret = open_next_audio_file();
850 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
853 PARA_ERROR_LOG("unknown command\n");
857 static void execute_afs_command(int fd, uint32_t expected_cookie)
861 char buf[sizeof(cookie) + sizeof(query_shmid)];
862 int ret = recv_bin_buffer(fd, buf, sizeof(buf));
865 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret));
868 if (ret != sizeof(buf)) {
869 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
870 ret, (long unsigned) sizeof(buf));
873 cookie = *(uint32_t *)buf;
874 if (cookie != expected_cookie) {
875 PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
876 (unsigned)cookie, (unsigned)expected_cookie);
879 query_shmid = *(int *)(buf + sizeof(cookie));
880 if (query_shmid < 0) {
881 PARA_WARNING_LOG("received invalid query shmid %d)\n",
885 /* Ignore return value: Errors might be OK here. */
886 call_callback(fd, query_shmid);
889 /** Shutdown connection if query has not arrived until this many seconds. */
890 #define AFS_CLIENT_TIMEOUT 3
892 static void command_post_select(struct sched *s, struct task *t)
894 struct command_task *ct = t->private_data;
895 struct sockaddr_un unix_addr;
896 struct afs_client *client, *tmp;
898 if (FD_ISSET(server_socket, &s->rfds))
899 execute_server_command();
901 /* Check the list of connected clients. */
902 list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
903 if (FD_ISSET(client->fd, &s->rfds))
904 execute_afs_command(client->fd, ct->cookie);
905 else { /* prevent bogus connection flooding */
907 tv_diff(now, &client->connect_time, &diff);
908 if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
910 PARA_WARNING_LOG("connection timeout\n");
913 list_del(&client->node);
916 /* Accept connections on the local socket. */
917 if (!FD_ISSET(ct->fd, &s->rfds))
919 t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
921 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
925 t->ret = mark_fd_nonblock(fd);
927 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
931 client = para_malloc(sizeof(*client));
933 client->connect_time = *now;
934 para_list_add(&client->node, &afs_client_list);
939 static void register_command_task(uint32_t cookie)
941 struct command_task *ct = &command_task_struct;
942 ct->fd = setup_command_socket_or_die();
945 ct->task.pre_select = command_pre_select;
946 ct->task.post_select = command_post_select;
947 ct->task.private_data = ct;
948 sprintf(ct->task.status, "command task");
949 register_task(&ct->task);
952 static void register_tasks(uint32_t cookie)
954 register_signal_task();
955 register_command_task(cookie);
959 * Initialize the audio file selector process.
961 * \param cookie The value used for "authentication".
962 * \param socket_fd File descriptor used for communication with the server.
964 __noreturn void afs_init(uint32_t cookie, int socket_fd)
969 INIT_LIST_HEAD(&afs_client_list);
970 for (i = 0; i < NUM_AFS_TABLES; i++)
971 afs_tables[i].init(&afs_tables[i]);
972 ret = open_afs_tables();
975 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
978 server_socket = socket_fd;
979 ret = mark_fd_nonblock(server_socket);
982 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
983 server_socket, (unsigned) cookie);
984 init_admissible_files(conf.afs_initial_mode_arg);
985 register_tasks(cookie);
986 s.default_timeout.tv_sec = 0;
987 s.default_timeout.tv_usec = 999 * 1000;
990 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
995 static int create_tables_callback(const struct osl_object *query,
996 __a_unused struct osl_object *result)
998 uint32_t table_mask = *(uint32_t *)query->data;
1002 for (i = 0; i < NUM_AFS_TABLES; i++) {
1003 struct afs_table *t = &afs_tables[i];
1005 if (!(table_mask & (1 << i)))
1009 ret = t->create(database_dir);
1013 ret = open_afs_tables();
1014 return ret < 0? ret: 0;
1017 int com_init(int fd, int argc, char * const * const argv)
1020 uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
1021 struct osl_object query = {.data = &table_mask,
1022 .size = sizeof(table_mask)};
1024 ret = make_database_dir();
1029 for (i = 1; i < argc; i++) {
1030 for (j = 0; j < NUM_AFS_TABLES; j++) {
1031 struct afs_table *t = &afs_tables[j];
1033 if (strcmp(argv[i], t->name))
1035 table_mask |= (1 << j);
1038 if (j == NUM_AFS_TABLES)
1039 return -E_BAD_TABLE_NAME;
1042 ret = send_callback_request(create_tables_callback, &query, NULL);
1045 return send_va_buffer(fd, "successfully created afs table(s)\n");
1049 * Flags for the check command.
1053 enum com_check_flags {
1054 /** Check the audio file table. */
1056 /** Check the mood table. */
1058 /** Check the playlist table. */
1062 int com_check(int fd, int argc, char * const * const argv)
1066 struct osl_object result;
1068 for (i = 1; i < argc; i++) {
1069 const char *arg = argv[i];
1072 if (!strcmp(arg, "--")) {
1076 if (!strcmp(arg, "-a")) {
1080 if (!strcmp(arg, "-p")) {
1081 flags |= CHECK_PLAYLISTS;
1084 if (!strcmp(arg, "-m")) {
1085 flags |= CHECK_MOODS;
1088 return -E_AFS_SYNTAX;
1091 return -E_AFS_SYNTAX;
1094 if (flags & CHECK_AFT) {
1095 ret = send_callback_request(aft_check_callback, NULL, &result);
1099 ret = send_buffer(fd, (char *) result.data);
1105 if (flags & CHECK_PLAYLISTS) {
1106 ret = send_callback_request(playlist_check_callback, NULL, &result);
1110 ret = send_buffer(fd, (char *) result.data);
1116 if (flags & CHECK_MOODS) {
1117 ret = send_callback_request(mood_check_callback, NULL, &result);
1121 ret = send_buffer(fd, (char *) result.data);
1130 void afs_event(enum afs_events event, struct para_buffer *pb,
1135 for (i = 0; i < NUM_AFS_TABLES; i++) {
1136 struct afs_table *t = &afs_tables[i];
1137 if (!t->event_handler)
1139 ret = t->event_handler(event, pb, data);
1141 PARA_CRIT_LOG("%s\n", PARA_STRERROR(-ret));
1145 int images_event_handler(__a_unused enum afs_events event,
1146 __a_unused struct para_buffer *pb, __a_unused void *data)
1151 int lyrics_event_handler(__a_unused enum afs_events event,
1152 __a_unused struct para_buffer *pb, __a_unused void *data)