2 * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file afs.c Paraslash's audio file selector. */
9 #include <netinet/in.h>
10 #include <sys/socket.h>
16 #include <arpa/inet.h>
20 #include "server.cmdline.h"
38 /** The osl tables used by afs. \sa blob.c. */
40 /** Contains audio file information. See aft.c. */
42 /** The table for the paraslash attributes. See attribute.c. */
45 * Paraslash's scoring system is based on Gaussian normal
46 * distributions, and the relevant data is stored in the rbtrees of an
47 * osl table containing only volatile columns. See score.c for
52 * A standard blob table containing the mood definitions. For details
56 /** A blob table containing lyrics on a per-song basis. */
58 /** Another blob table for images (for example album cover art). */
60 /** Yet another blob table for storing standard playlists. */
62 /** How many tables are in use? */
66 static struct afs_table afs_tables[NUM_AFS_TABLES] = {
67 [TBLNUM_AUDIO_FILES] = {.init = aft_init, .name = "audio_files"},
68 [TBLNUM_ATTRIBUTES] = {.init = attribute_init, .name = "attributes"},
69 [TBLNUM_SCORES] = {.init = score_init, .name = "scores"},
70 [TBLNUM_MOODS] = {.init = moods_init, .name = "moods"},
71 [TBLNUM_LYRICS] = {.init = lyrics_init, .name = "lyrics"},
72 [TBLNUM_IMAGES] = {.init = images_init, .name = "images"},
73 [TBLNUM_PLAYLIST] = {.init = playlists_init, .name = "playlists"},
77 /** The file descriptor for the local socket. */
80 * Value sent by the command handlers to identify themselves as
81 * children of the running para_server.
84 /** The associated task structure. */
89 extern struct misc_meta_data *mmd;
91 static int server_socket;
92 static struct command_task command_task_struct;
93 static struct signal_task *signal_task;
95 static enum play_mode current_play_mode;
96 static char *current_mop; /* mode or playlist specifier. NULL means dummy mood */
99 * A random number used to "authenticate" the connection.
101 * para_server picks this number by random before it forks the afs process. The
102 * command handlers know this number as well and write it to the afs socket,
103 * together with the id of the shared memory area which contains the payload of
104 * the afs command. A local process has to know this number to abuse the afs
105 * service provided by the local socket.
107 extern uint32_t afs_socket_cookie;
110 * Struct to let command handlers execute a callback in afs context.
112 * Commands that need to change the state of afs can't change the relevant data
113 * structures directly because commands are executed in a child process, i.e.
114 * they get their own virtual address space.
116 * This structure is used by \p send_callback_request() (executed from handler
117 * context) in order to let the afs process call the specified function. An
118 * instance of that structure is written to a shared memory area together with
119 * the arguments to the callback function. The identifier of the shared memory
120 * area is written to the command socket.
122 * The afs process accepts connections on the command socket and reads the
123 * shared memory id, attaches the corresponding area, calls the given handler to
124 * perform the desired action and to optionally compute a result.
126 * The result and a \p callback_result structure is then written to another
127 * shared memory area. The identifier for that area is written to the handler's
128 * command socket, so that the handler process can read the id, attach the
129 * shared memory area and use the result.
131 * \sa struct callback_result.
133 struct callback_query {
134 /** The function to be called. */
135 afs_callback *handler;
136 /** The number of bytes of the query */
141 * Structure embedded in the result of a callback.
143 * If the callback produced a result, an instance of that structure is embedded
144 * into the shared memory area holding the result, mainly to let the command
145 * handler know the size of the result.
147 * \sa struct callback_query.
149 struct callback_result {
150 /** The number of bytes of the result. */
152 /** The band designator (loglevel for the result). */
156 static int dispatch_result(int result_shmid, callback_result_handler *handler,
157 void *private_result_data)
159 struct osl_object result;
161 /* must attach r/w as result.data might get encrypted in-place. */
162 int ret2, ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
163 struct callback_result *cr = result_shm;
166 PARA_ERROR_LOG("attach failed: %s\n", para_strerror(-ret));
169 result.size = cr->result_size;
170 result.data = result_shm + sizeof(*cr);
172 ret = handler(&result, cr->band, private_result_data);
173 ret2 = shm_detach(result_shm);
175 PARA_ERROR_LOG("detach failed: %s\n", para_strerror(-ret2));
183 * Ask the afs process to call a given function.
185 * \param f The function to be called.
186 * \param query Pointer to arbitrary data for the callback.
187 * \param result_handler Called for each shm area sent by the callback.
188 * \param private_result_data Passed verbatim to \a result_handler.
190 * This function creates a socket for communication with the afs process and a
191 * shared memory area (sma) to which the buffer pointed to by \a query is
192 * copied. It then notifies the afs process that the callback function \a f
193 * should be executed by sending the shared memory identifier (shmid) to the
196 * If the callback produces a result, it sends any number of shared memory
197 * identifiers back via the socket. For each such identifier received, \a
198 * result_handler is called. The contents of the sma identified by the received
199 * shmid are passed to that function as an osl object. The private_result_data
200 * pointer is passed as the second argument to \a result_handler.
202 * \return Number of shared memory areas dispatched on success, negative on errors.
204 * \sa send_option_arg_callback_request(), send_standard_callback_request().
206 int send_callback_request(afs_callback *f, struct osl_object *query,
207 callback_result_handler *result_handler,
208 void *private_result_data)
210 struct callback_query *cq;
211 int ret, fd = -1, query_shmid, result_shmid;
213 char buf[sizeof(afs_socket_cookie) + sizeof(int)];
214 size_t query_shm_size = sizeof(*cq);
215 int dispatch_error = 0, num_dispatched = 0;
218 query_shm_size += query->size;
219 ret = shm_new(query_shm_size);
223 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
228 cq->query_size = query_shm_size - sizeof(*cq);
231 memcpy(query_shm + sizeof(*cq), query->data, query->size);
232 ret = shm_detach(query_shm);
236 *(uint32_t *)buf = afs_socket_cookie;
237 *(int *)(buf + sizeof(afs_socket_cookie)) = query_shmid;
239 ret = connect_local_socket(conf.afs_socket_arg);
243 ret = write_all(fd, buf, sizeof(buf));
247 * Read all shmids from afs.
249 * Even if the dispatcher returns an error we _must_ continue to read
250 * shmids from fd so that we can destroy all shared memory areas that
251 * have been created for us by the afs process.
254 ret = recv_bin_buffer(fd, buf, sizeof(int));
257 assert(ret == sizeof(int));
261 ret = dispatch_result(result_shmid, result_handler,
262 private_result_data);
263 if (ret < 0 && dispatch_error >= 0)
264 dispatch_error = ret;
265 ret = shm_destroy(result_shmid);
267 PARA_CRIT_LOG("destroy result failed: %s\n",
268 para_strerror(-ret));
272 if (shm_destroy(query_shmid) < 0)
273 PARA_CRIT_LOG("shm destroy error\n");
276 if (dispatch_error < 0)
277 return dispatch_error;
280 return num_dispatched;
284 * Send a callback request passing an options structure and an argument vector.
286 * \param options pointer to an arbitrary data structure.
287 * \param argc Argument count.
288 * \param argv Standard argument vector.
289 * \param f The callback function.
290 * \param result_handler See \ref send_callback_request.
291 * \param private_result_data See \ref send_callback_request.
293 * Some command handlers pass command-specific options to a callback, together
294 * with a list of further arguments (often a list of audio files). This
295 * function allows to pass an arbitrary structure (given as an osl object) and
296 * a usual argument vector to the specified callback.
298 * \return The return value of the underlying call to \ref
299 * send_callback_request().
301 * \sa send_standard_callback_request(), send_callback_request().
303 int send_option_arg_callback_request(struct osl_object *options,
304 int argc, char * const * const argv, afs_callback *f,
305 callback_result_handler *result_handler,
306 void *private_result_data)
310 struct osl_object query = {.size = options? options->size : 0};
312 for (i = 0; i < argc; i++)
313 query.size += strlen(argv[i]) + 1;
314 query.data = para_malloc(query.size);
317 memcpy(query.data, options->data, options->size);
320 for (i = 0; i < argc; i++) {
321 strcpy(p, argv[i]); /* OK */
322 p += strlen(argv[i]) + 1;
324 ret = send_callback_request(f, &query, result_handler,
325 private_result_data);
331 * Send a callback request with an argument vector only.
333 * \param argc The same meaning as in send_option_arg_callback_request().
334 * \param argv The same meaning as in send_option_arg_callback_request().
335 * \param f The same meaning as in send_option_arg_callback_request().
336 * \param result_handler See \ref send_callback_request.
337 * \param private_result_data See \ref send_callback_request.
339 * This is similar to send_option_arg_callback_request(), but no options buffer
340 * is passed to the parent process.
342 * \return The return value of the underlying call to
343 * send_option_arg_callback_request().
345 int send_standard_callback_request(int argc, char * const * const argv,
346 afs_callback *f, callback_result_handler *result_handler,
347 void *private_result_data)
349 return send_option_arg_callback_request(NULL, argc, argv, f, result_handler,
350 private_result_data);
353 static int action_if_pattern_matches(struct osl_row *row, void *data)
355 struct pattern_match_data *pmd = data;
356 struct osl_object name_obj;
357 const char *p, *name;
358 int ret = osl(osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj));
359 const char *pattern_txt = (const char *)pmd->patterns.data;
363 name = (char *)name_obj.data;
364 if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
366 if (pmd->patterns.size == 0 &&
367 (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING)) {
369 return pmd->action(pmd->table, row, name, pmd->data);
371 for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
372 p += strlen(p) + 1) {
373 ret = fnmatch(p, name, pmd->fnmatch_flags);
374 if (ret == FNM_NOMATCH)
378 ret = pmd->action(pmd->table, row, name, pmd->data);
387 * Execute the given function for each matching row.
389 * \param pmd Describes what to match and how.
393 int for_each_matching_row(struct pattern_match_data *pmd)
395 if (pmd->pm_flags & PM_REVERSE_LOOP)
396 return osl(osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
397 action_if_pattern_matches));
398 return osl(osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
399 action_if_pattern_matches));
403 * Compare two osl objects of string type.
405 * \param obj1 Pointer to the first object.
406 * \param obj2 Pointer to the second object.
408 * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
409 * are taken into account.
411 * \return It returns an integer less than, equal to, or greater than zero if
412 * \a obj1 is found, respectively, to be less than, to match, or be greater than
415 * \sa strcmp(3), strncmp(3), osl_compare_func.
417 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
419 const char *str1 = (const char *)obj1->data;
420 const char *str2 = (const char *)obj2->data;
421 return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
424 static int pass_afd(int fd, char *buf, size_t size)
426 struct msghdr msg = {.msg_iov = NULL};
427 struct cmsghdr *cmsg;
428 char control[255] __a_aligned(8);
438 msg.msg_control = control;
439 msg.msg_controllen = sizeof(control);
441 cmsg = CMSG_FIRSTHDR(&msg);
442 cmsg->cmsg_level = SOL_SOCKET;
443 cmsg->cmsg_type = SCM_RIGHTS;
444 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
445 *(int *)CMSG_DATA(cmsg) = fd;
447 /* Sum of the length of all control messages in the buffer */
448 msg.msg_controllen = cmsg->cmsg_len;
449 PARA_DEBUG_LOG("passing %zu bytes and fd %d\n", size, fd);
450 ret = sendmsg(server_socket, &msg, 0);
452 ret = -ERRNO_TO_PARA_ERROR(errno);
459 * Pass the fd of the next audio file to the server process.
461 * This stores all information for streaming the "best" audio file in a shared
462 * memory area. The id of that area and an open file descriptor for the next
463 * audio file are passed to the server process.
467 * \sa open_and_update_audio_file().
469 static int open_next_audio_file(void)
471 struct audio_file_data afd;
475 ret = open_and_update_audio_file(&afd);
477 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
478 goto no_admissible_files;
481 if (!write_ok(server_socket)) {
485 *(uint32_t *)buf = NEXT_AUDIO_FILE;
486 *(uint32_t *)(buf + 4) = (uint32_t)shmid;
487 ret = pass_afd(afd.fd, buf, 8);
495 *(uint32_t *)buf = NO_ADMISSIBLE_FILES;
496 *(uint32_t *)(buf + 4) = (uint32_t)0;
497 return write_all(server_socket, buf, 8);
500 /* Never fails if arg == NULL */
501 static int activate_mood_or_playlist(const char *arg, int *num_admissible)
507 ret = change_current_mood(NULL); /* always successful */
508 mode = PLAY_MODE_MOOD;
510 if (!strncmp(arg, "p/", 2)) {
511 ret = playlist_open(arg + 2);
512 mode = PLAY_MODE_PLAYLIST;
513 } else if (!strncmp(arg, "m/", 2)) {
514 ret = change_current_mood(arg + 2);
515 mode = PLAY_MODE_MOOD;
517 return -E_AFS_SYNTAX;
522 *num_admissible = ret;
523 current_play_mode = mode;
524 if (arg != current_mop) {
527 current_mop = para_strdup(arg);
528 mutex_lock(mmd_mutex);
529 strncpy(mmd->afs_mode_string, arg,
530 sizeof(mmd->afs_mode_string));
531 mmd->afs_mode_string[sizeof(mmd->afs_mode_string) - 1] = '\0';
532 mutex_unlock(mmd_mutex);
534 mutex_lock(mmd_mutex);
535 strcpy(mmd->afs_mode_string, "dummy");
536 mutex_unlock(mmd_mutex);
544 * Result handler for sending data to the para_client process.
546 * \param result The data to be sent.
547 * \param band The band designator.
548 * \param private Pointer to the command context.
550 * \return The return value of the underlying call to \ref command.c::send_sb.
552 * \sa \ref callback_result_handler, \ref command.c::send_sb.
554 int afs_cb_result_handler(struct osl_object *result, uint8_t band,
557 struct command_context *cc = private;
565 case SBD_WARNING_LOG:
569 assert(result->size > 0);
570 return send_sb(&cc->scc, result->data, result->size, band, true);
571 case SBD_AFS_CB_FAILURE:
572 return *(int *)(result->data);
578 static void flush_and_free_pb(struct para_buffer *pb)
581 struct afs_max_size_handler_data *amshd = pb->private_data;
583 if (pb->buf && pb->size > 0) {
584 ret = pass_buffer_as_shm(amshd->fd, amshd->band, pb->buf,
587 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
592 static int com_select_callback(struct afs_callback_arg *aca)
594 const char *arg = aca->query.data;
595 int num_admissible, ret;
597 ret = clear_score_table();
599 para_printf(&aca->pbout, "could not clear score table: %s\n",
600 para_strerror(-ret));
603 if (current_play_mode == PLAY_MODE_MOOD)
604 close_current_mood();
607 ret = activate_mood_or_playlist(arg, &num_admissible);
610 /* ignore subsequent errors (but log them) */
611 para_printf(&aca->pbout, "could not activate %s\n", arg);
614 para_printf(&aca->pbout, "switching back to %s\n", current_mop);
615 ret2 = activate_mood_or_playlist(current_mop, &num_admissible);
618 para_printf(&aca->pbout, "could not reactivate %s: %s\n",
619 current_mop, para_strerror(-ret2));
621 para_printf(&aca->pbout, "activating dummy mood\n");
622 activate_mood_or_playlist(NULL, &num_admissible);
624 para_printf(&aca->pbout, "activated %s (%d admissible files)\n",
625 current_mop? current_mop : "dummy mood", num_admissible);
629 int com_select(struct command_context *cc)
631 struct osl_object query;
634 return -E_AFS_SYNTAX;
635 query.data = cc->argv[1];
636 query.size = strlen(cc->argv[1]) + 1;
637 return send_callback_request(com_select_callback, &query,
638 &afs_cb_result_handler, cc);
641 static void init_admissible_files(char *arg)
643 if (activate_mood_or_playlist(arg, NULL) < 0)
644 activate_mood_or_playlist(NULL, NULL); /* always successful */
647 static int setup_command_socket_or_die(void)
650 char *socket_name = conf.afs_socket_arg;
653 ret = create_local_socket(socket_name, 0);
655 ret = create_local_socket(socket_name,
656 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IROTH);
658 PARA_EMERG_LOG("%s: %s\n", para_strerror(-ret),
664 PARA_INFO_LOG("listening on socket %s (fd %d)\n", socket_name,
669 static void close_afs_tables(void)
672 PARA_NOTICE_LOG("closing afs_tables\n");
673 for (i = 0; i < NUM_AFS_TABLES; i++)
674 afs_tables[i].close();
677 static char *database_dir;
679 static void get_database_dir(void)
682 if (conf.afs_database_dir_given)
683 database_dir = para_strdup(conf.afs_database_dir_arg);
685 char *home = para_homedir();
686 database_dir = make_message(
687 "%s/.paraslash/afs_database-0.4", home);
691 PARA_INFO_LOG("afs_database dir %s\n", database_dir);
694 static int make_database_dir(void)
699 ret = para_mkdir(database_dir, 0777);
700 if (ret >= 0 || ret == -ERRNO_TO_PARA_ERROR(EEXIST))
705 static int open_afs_tables(void)
710 PARA_NOTICE_LOG("opening %d osl tables in %s\n", NUM_AFS_TABLES,
712 for (i = 0; i < NUM_AFS_TABLES; i++) {
713 ret = afs_tables[i].open(database_dir);
716 PARA_ERROR_LOG("%s init: %s\n", afs_tables[i].name,
717 para_strerror(-ret));
723 afs_tables[--i].close();
727 static int afs_signal_post_select(struct sched *s, __a_unused void *context)
731 if (getppid() == 1) {
732 PARA_EMERG_LOG("para_server died\n");
735 signum = para_next_signal(&s->rfds);
738 if (signum == SIGHUP) {
740 parse_config_or_die(1);
741 ret = open_afs_tables();
744 init_admissible_files(current_mop);
747 PARA_EMERG_LOG("terminating on signal %d\n", signum);
749 task_notify_all(s, E_AFS_SIGNAL);
750 return -E_AFS_SIGNAL;
753 static void register_signal_task(struct sched *s)
755 para_sigaction(SIGPIPE, SIG_IGN);
756 signal_task = signal_init_or_die();
757 para_install_sighandler(SIGINT);
758 para_install_sighandler(SIGTERM);
759 para_install_sighandler(SIGHUP);
761 signal_task->task = task_register(&(struct task_info) {
763 .pre_select = signal_pre_select,
764 .post_select = afs_signal_post_select,
765 .context = signal_task,
770 static struct list_head afs_client_list;
772 /** Describes one connected afs client. */
774 /** Position in the afs client list. */
775 struct list_head node;
776 /** The socket file descriptor for this client. */
778 /** The time the client connected. */
779 struct timeval connect_time;
782 static void command_pre_select(struct sched *s, void *context)
784 struct command_task *ct = context;
785 struct afs_client *client;
787 para_fd_set(server_socket, &s->rfds, &s->max_fileno);
788 para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
789 list_for_each_entry(client, &afs_client_list, node)
790 para_fd_set(client->fd, &s->rfds, &s->max_fileno);
794 * Send data as shared memory to a file descriptor.
796 * \param fd File descriptor to send the shmid to.
797 * \param band The band designator for this data.
798 * \param buf The buffer holding the data to be sent.
799 * \param size The size of \a buf.
801 * This function creates a shared memory area large enough to hold
802 * the content given by \a buf and \a size and sends the identifier
803 * of this area to the file descriptor \a fd.
805 * It is called by the AFS max_size handler as well as directly by the AFS
806 * command callbacks to send command output to the command handlers.
808 * \return Zero if \a buf is \p NULL or \a size is zero. Negative on errors,
809 * and positive on success.
811 int pass_buffer_as_shm(int fd, uint8_t band, const char *buf, size_t size)
815 struct callback_result *cr;
818 assert(band != SBD_OUTPUT);
819 ret = shm_new(size + sizeof(*cr));
823 ret = shm_attach(shmid, ATTACH_RW, &shm);
827 cr->result_size = size;
830 memcpy(shm + sizeof(*cr), buf, size);
831 ret = shm_detach(shm);
834 ret = write_all(fd, (char *)&shmid, sizeof(int));
838 if (shm_destroy(shmid) < 0)
839 PARA_ERROR_LOG("destroy result failed\n");
843 static int call_callback(int fd, int query_shmid)
846 struct callback_query *cq;
848 struct afs_callback_arg aca = {.fd = fd};
850 ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
854 aca.query.data = (char *)query_shm + sizeof(*cq);
855 aca.query.size = cq->query_size;
856 aca.pbout.max_size = shm_get_shmmax();
857 aca.pbout.max_size_handler = afs_max_size_handler;
858 aca.pbout.private_data = &(struct afs_max_size_handler_data) {
862 ret = cq->handler(&aca);
863 ret2 = shm_detach(query_shm);
865 if (ret < 0) /* ignore (but log) detach error */
866 PARA_ERROR_LOG("could not detach sma: %s\n",
867 para_strerror(-ret2));
871 flush_and_free_pb(&aca.pbout);
873 ret2 = pass_buffer_as_shm(fd, SBD_AFS_CB_FAILURE,
874 (const char *)&ret, sizeof(ret));
876 PARA_ERROR_LOG("could not pass cb failure packet: %s\n",
877 para_strerror(-ret));
882 static int execute_server_command(fd_set *rfds)
886 int ret = read_nonblock(server_socket, buf, sizeof(buf) - 1, rfds, &n);
888 if (ret < 0 || n == 0)
891 if (strcmp(buf, "new"))
892 return -ERRNO_TO_PARA_ERROR(EINVAL);
893 return open_next_audio_file();
896 /* returns 0 if no data available, 1 else */
897 static int execute_afs_command(int fd, fd_set *rfds, uint32_t expected_cookie)
901 char buf[sizeof(cookie) + sizeof(query_shmid)];
903 int ret = read_nonblock(fd, buf, sizeof(buf), rfds, &n);
909 if (n != sizeof(buf)) {
910 PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
911 ret, (long unsigned) sizeof(buf));
914 cookie = *(uint32_t *)buf;
915 if (cookie != expected_cookie) {
916 PARA_NOTICE_LOG("received invalid cookie (got %u, expected %u)\n",
917 (unsigned)cookie, (unsigned)expected_cookie);
920 query_shmid = *(int *)(buf + sizeof(cookie));
921 if (query_shmid < 0) {
922 PARA_WARNING_LOG("received invalid query shmid %d)\n",
926 ret = call_callback(fd, query_shmid);
930 PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
934 /** Shutdown connection if query has not arrived until this many seconds. */
935 #define AFS_CLIENT_TIMEOUT 3
937 static int command_post_select(struct sched *s, void *context)
939 struct command_task *ct = context;
940 struct sockaddr_un unix_addr;
941 struct afs_client *client, *tmp;
944 ret = task_get_notification(ct->task);
947 ret = execute_server_command(&s->rfds);
949 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
950 task_notify_all(s, -ret);
953 /* Check the list of connected clients. */
954 list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
955 ret = execute_afs_command(client->fd, &s->rfds, ct->cookie);
956 if (ret == 0) { /* prevent bogus connection flooding */
958 tv_diff(now, &client->connect_time, &diff);
959 if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
961 PARA_WARNING_LOG("connection timeout\n");
964 list_del(&client->node);
967 /* Accept connections on the local socket. */
968 ret = para_accept(ct->fd, &s->rfds, &unix_addr, sizeof(unix_addr), &fd);
970 PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
973 ret = mark_fd_nonblocking(fd);
975 PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
979 client = para_malloc(sizeof(*client));
981 client->connect_time = *now;
982 para_list_add(&client->node, &afs_client_list);
986 static void register_command_task(uint32_t cookie, struct sched *s)
988 struct command_task *ct = &command_task_struct;
989 ct->fd = setup_command_socket_or_die();
992 ct->task = task_register(&(struct task_info) {
993 .name = "afs command",
994 .pre_select = command_pre_select,
995 .post_select = command_post_select,
1001 * Initialize the audio file selector process.
1003 * \param cookie The value used for "authentication".
1004 * \param socket_fd File descriptor used for communication with the server.
1006 __noreturn void afs_init(uint32_t cookie, int socket_fd)
1008 static struct sched s;
1011 register_signal_task(&s);
1012 INIT_LIST_HEAD(&afs_client_list);
1013 for (i = 0; i < NUM_AFS_TABLES; i++)
1014 afs_tables[i].init(&afs_tables[i]);
1015 ret = open_afs_tables();
1018 server_socket = socket_fd;
1019 ret = mark_fd_nonblocking(server_socket);
1022 PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
1023 server_socket, (unsigned) cookie);
1024 init_admissible_files(conf.afs_initial_mode_arg);
1025 register_command_task(cookie, &s);
1026 s.default_timeout.tv_sec = 0;
1027 s.default_timeout.tv_usec = 999 * 1000;
1028 ret = write(socket_fd, "\0", 1);
1032 ret = -ERRNO_TO_PARA_ERROR(errno);
1041 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
1045 static int com_init_callback(struct afs_callback_arg *aca)
1047 uint32_t table_mask = *(uint32_t *)aca->query.data;
1051 for (i = 0; i < NUM_AFS_TABLES; i++) {
1052 struct afs_table *t = &afs_tables[i];
1054 if (!(table_mask & (1 << i)))
1058 ret = t->create(database_dir);
1060 para_printf(&aca->pbout, "cannot create table %s\n",
1064 para_printf(&aca->pbout, "successfully created %s table\n",
1067 ret = open_afs_tables();
1069 para_printf(&aca->pbout, "cannot open afs tables\n");
1074 int com_init(struct command_context *cc)
1077 uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
1078 struct osl_object query = {.data = &table_mask,
1079 .size = sizeof(table_mask)};
1081 ret = make_database_dir();
1084 if (cc->argc != 1) {
1086 for (i = 1; i < cc->argc; i++) {
1087 for (j = 0; j < NUM_AFS_TABLES; j++) {
1088 struct afs_table *t = &afs_tables[j];
1090 if (strcmp(cc->argv[i], t->name))
1092 table_mask |= (1 << j);
1095 if (j == NUM_AFS_TABLES)
1096 return -E_BAD_TABLE_NAME;
1099 return send_callback_request(com_init_callback, &query,
1100 afs_cb_result_handler, cc);
1104 * Flags for the check command.
1108 enum com_check_flags {
1109 /** Check the audio file table. */
1111 /** Check the mood table. */
1113 /** Check the playlist table. */
1114 CHECK_PLAYLISTS = 4,
1115 /** Check the attribute table against the audio file table. */
1119 int com_check(struct command_context *cc)
1124 for (i = 1; i < cc->argc; i++) {
1125 const char *arg = cc->argv[i];
1128 if (!strcmp(arg, "--")) {
1132 if (!strcmp(arg, "-a")) {
1136 if (!strcmp(arg, "-A")) {
1137 flags |= CHECK_ATTS;
1140 if (!strcmp(arg, "-p")) {
1141 flags |= CHECK_PLAYLISTS;
1144 if (!strcmp(arg, "-m")) {
1145 flags |= CHECK_MOODS;
1148 return -E_AFS_SYNTAX;
1151 return -E_AFS_SYNTAX;
1154 if (flags & CHECK_AFT) {
1155 ret = send_callback_request(aft_check_callback, NULL,
1156 afs_cb_result_handler, cc);
1160 if (flags & CHECK_ATTS) {
1161 ret = send_callback_request(attribute_check_callback, NULL,
1162 afs_cb_result_handler, cc);
1166 if (flags & CHECK_PLAYLISTS) {
1167 ret = send_callback_request(playlist_check_callback,
1168 NULL, afs_cb_result_handler, cc);
1172 if (flags & CHECK_MOODS) {
1173 ret = send_callback_request(mood_check_callback, NULL,
1174 afs_cb_result_handler, cc);
1182 * The afs event dispatcher.
1184 * \param event Type of the event.
1185 * \param pb May be \p NULL.
1186 * \param data Type depends on \a event.
1188 * This function calls each table event handler, passing \a pb and \a data
1189 * verbatim. It's up to the handlers to interpret the \a data pointer. If a
1190 * handler returns negative, the loop is aborted.
1192 * \return The (negative) error code of the first handler that failed, or non-negative
1193 * if all handlers succeeded.
1195 __must_check int afs_event(enum afs_events event, struct para_buffer *pb,
1200 for (i = 0; i < NUM_AFS_TABLES; i++) {
1201 struct afs_table *t = &afs_tables[i];
1202 if (!t->event_handler)
1204 ret = t->event_handler(event, pb, data);
1206 PARA_CRIT_LOG("table %s, event %u: %s\n", t->name,
1207 event, para_strerror(-ret));
1215 * Dummy event handler for the images table.
1217 * \param event Unused.
1219 * \param data Unused.
1221 * \return The images table does not honor events, so this handler always
1224 __a_const int images_event_handler(__a_unused enum afs_events event,
1225 __a_unused struct para_buffer *pb, __a_unused void *data)
1231 * Dummy event handler for the lyrics table.
1233 * \param event Unused.
1235 * \param data Unused.
1237 * \return The lyrics table does not honor events, so this handler always
1240 __a_const int lyrics_event_handler(__a_unused enum afs_events event,
1241 __a_unused struct para_buffer *pb, __a_unused void *data)