X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afs.c;h=f6d6b8d78145829993fd6e817555b56b669fc460;hp=8e0a50aa90fd5547c80bf168236f76221f36e7bf;hb=769888ee3175ed60df3c23caf51cdad5db33d141;hpb=db34194eaab9819772bd55ea1ab08c719ed8f1c8 diff --git a/afs.c b/afs.c index 8e0a50aa..f6d6b8d7 100644 --- a/afs.c +++ b/afs.c @@ -1,492 +1,974 @@ /* - * Copyright (C) 1997-2006 Andre Noll + * Copyright (C) 2007 Andre Noll * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. + * Licensed under the GPL v2. For licencing details see COPYING. */ -/** \file afs.c audio file sending functions - * - * This contains the audio sending part of para_server which is independent of - * the current audio format, audio file selector and of the activated senders. - */ +/** \file afs.c Paraslash's audio file selector. */ -#include "server.h" -#include /* gettimeofday */ +#include +#include #include "server.cmdline.h" -#include "db.h" -#include "afs.h" -#include "send.h" +#include "para.h" +#include "afh.h" +#include "server.h" #include "error.h" +#include /* readdir() */ +#include +#include +#include "net.h" +#include "afs.h" +#include "ipc.h" #include "string.h" +#include "list.h" +#include "sched.h" +#include "signal.h" +#include "fd.h" + +/** The osl tables used by afs. \sa blob.c. */ +enum afs_table_num { + /** Contains audio file information. See aft.c. */ + TBLNUM_AUDIO_FILES, + /** The table for the paraslash attributes. See attribute.c. */ + TBLNUM_ATTRIBUTES, + /** + * Paraslash's scoring system is based on Gaussian normal + * distributions, and the relevant data is stored in the rbtrees of an + * osl table containing only volatile columns. See score.c for + * details. + */ + TBLNUM_SCORES, + /** + * A standard blob table containing the mood definitions. For details + * see mood.c. + */ + TBLNUM_MOODS, + /** A blob table containing lyrics on a per-song basis. */ + TBLNUM_LYRICS, + /** Another blob table for images (for example album cover art). */ + TBLNUM_IMAGES, + /** Yet another blob table for storing standard playlists. */ + TBLNUM_PLAYLIST, + /** How many tables are in use? */ + NUM_AFS_TABLES +}; -extern const char *status_item_list[]; - -static struct timeval announce_tv; -static struct timeval data_send_barrier; -static struct timeval eof_barrier; - -extern struct misc_meta_data *mmd; -extern struct audio_file_selector selectors[]; -extern struct sender senders[]; -extern struct gengetopt_args_info conf; - -static FILE *audio_file = NULL; - -#if 1 - void mp3_init(void *); -#endif +static struct table_info afs_tables[NUM_AFS_TABLES]; + +struct command_task { + /** The file descriptor for the local socket. */ + int fd; + /** + * Value sent by the command handlers to identify themselves as + * children of the running para_server. + */ + uint32_t cookie; + /** The associated task structure. */ + struct task task; +}; -#ifdef HAVE_OGGVORBIS - void ogg_init(void *); -#endif -#ifdef HAVE_FAAD - void aac_afh_init(void *); -#endif +/** + * A random number used to "authenticate" the connection. + * + * para_server picks this number by random before forking the afs process. The + * command handlers write this number together with the id of the shared memory + * area containing the query. This way, a malicious local user has to know this + * number to be able to cause the afs process to crash by sending fake queries. + */ +extern uint32_t afs_socket_cookie; /** - * the list of supported audio formats + * Struct to let command handlers execute a callback in afs context. + * + * Commands that need to change the state of afs can't change the relevant data + * structures directly because commands are executed in a child process, i.e. + * they get their own virtual address space. + * + * This structure is used by \p send_callback_request() (executed from handler + * context) in order to let the afs process call the specified function. An + * instance of that structure is written to a shared memory area together with + * the arguments to the callback function. The identifier of the shared memory + * area is written to the command socket. + * + * The afs process accepts connections on the command socket and reads the + * shared memory id, attaches the corresponing area, calls the given handler to + * perform the desired action and to optionally compute a result. + * + * The result and a \p callback_result structure is then written to another + * shared memory area. The identifier for that area is written to the handler's + * command socket, so that the handler process can read the id, attach the + * shared memory area and use the result. + * + * \sa struct callback_result. */ -struct audio_format_handler afl[] = { -#if 1 - { - .name = "mp3", - .init = mp3_init, - }, -#endif -#ifdef HAVE_OGGVORBIS - { - .name = "ogg", - .init = ogg_init, - }, -#endif -#ifdef HAVE_FAAD - { - .name = "aac", - .init = aac_afh_init, - }, -#endif - { - .name = NULL, - } +struct callback_query { + /** The function to be called. */ + callback_function *handler; + /** The number of bytes of the query */ + size_t query_size; }; +/** + * Structure embedded in the result of a callback. + * + * If the callback produced a result, an instance of that structure is embeeded + * into the shared memory area holding the result, mainly to let the command + * handler know the size of the result. + * + * \sa struct callback_query. + */ +struct callback_result { + /** The number of bytes of the result. */ + size_t result_size; +}; /** - * check if audio file sender is playing + * Ask the parent process to call a given function. + * + * \param f The function to be called. + * \param query Pointer to arbitrary data for the callback. + * \param result Callback result will be stored here. + * + * This function creates a shared memory area, copies the buffer pointed to by + * \a buf to that area and notifies the afs process that \a f should be + * called ASAP. * - * \return greater than zero if playing, zero otherwise. + * \return Negative, on errors, the return value of the callback function + * otherwise. * + * \sa send_option_arg_callback_request(), send_standard_callback_request(). */ -unsigned int afs_playing(void) +int send_callback_request(callback_function *f, struct osl_object *query, + struct osl_object *result) { - return mmd->new_afs_status_flags & AFS_PLAYING; + struct callback_query *cq; + struct callback_result *cr; + int ret, fd = -1, query_shmid, result_shmid; + void *query_shm, *result_shm; + char buf[sizeof(afs_socket_cookie) + sizeof(int)]; + struct sockaddr_un unix_addr; + size_t query_shm_size = sizeof(*cq); + + if (query) + query_shm_size += query->size; + ret = shm_new(query_shm_size); + if (ret < 0) + return ret; + query_shmid = ret; + ret = shm_attach(query_shmid, ATTACH_RW, &query_shm); + if (ret < 0) + goto out; + cq = query_shm; + cq->handler = f; + cq->query_size = query_shm_size - sizeof(*cq); + + if (query) + memcpy(query_shm + sizeof(*cq), query->data, query->size); + ret = shm_detach(query_shm); + if (ret < 0) + goto out; + + *(uint32_t *) buf = afs_socket_cookie; + *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid; + + ret = get_stream_socket(PF_UNIX); + if (ret < 0) + goto out; + fd = ret; + ret = init_unix_addr(&unix_addr, conf.afs_socket_arg); + if (ret < 0) + goto out; + ret = PARA_CONNECT(fd, &unix_addr); + if (ret < 0) + goto out; + ret = send_bin_buffer(fd, buf, sizeof(buf)); + if (ret < 0) + goto out; + ret = recv_bin_buffer(fd, buf, sizeof(buf)); + if (ret < 0) + goto out; + if (ret != sizeof(int)) { + ret = -E_RECV; + goto out; + } + ret = *(int *) buf; + if (ret <= 0) + goto out; + result_shmid = ret; + ret = shm_attach(result_shmid, ATTACH_RO, &result_shm); + if (ret >= 0) { + assert(result); + cr = result_shm; + result->size = cr->result_size; + result->data = para_malloc(result->size); + memcpy(result->data, result_shm + sizeof(*cr), result->size); + ret = shm_detach(result_shm); + if (ret < 0) + PARA_ERROR_LOG("can not detach result\n"); + } else + PARA_ERROR_LOG("attach result failed: %d\n", ret); + if (shm_destroy(result_shmid) < 0) + PARA_ERROR_LOG("destroy result failed\n"); + ret = 1; +out: + if (shm_destroy(query_shmid) < 0) + PARA_ERROR_LOG("%s\n", "shm destroy error"); + if (fd >= 0) + close(fd); +// PARA_DEBUG_LOG("callback_ret: %d\n", ret); + return ret; } /** - * check if 'next' flag is set afs_status_flags + * Send a callback request passing an options structure and an argument vector. * - * \return greater than zero if set, zero if not. + * \param options pointer to an arbitrary data structure. + * \param argc Argument count. + * \param argv Standard argument vector. + * \param f The callback function. + * \param result The result of the query is stored here. * + * Some commands have a couple of options that are parsed in child context for + * syntactic correctness and are stored in a special options structure for that + * command. This function allows to pass such a structure together with a list + * of further arguments (often a list of audio files) to the parent process. + * + * \sa send_standard_callback_request(), send_callback_request(). */ -unsigned int afs_next(void) +int send_option_arg_callback_request(struct osl_object *options, + int argc, char * const * const argv, callback_function *f, + struct osl_object *result) { - return mmd->new_afs_status_flags & AFS_NEXT; + char *p; + int i, ret; + struct osl_object query = {.size = options? options->size : 0}; + + for (i = 0; i < argc; i++) + query.size += strlen(argv[i]) + 1; + query.data = para_malloc(query.size); + p = query.data; + if (options) { + memcpy(query.data, options->data, options->size); + p += options->size; + } + for (i = 0; i < argc; i++) { + strcpy(p, argv[i]); /* OK */ + p += strlen(argv[i]) + 1; + } + ret = send_callback_request(f, &query, result); + free(query.data); + return ret; } /** - * check if a reposition request is pending + * Send a callback request with an argument vector only. + * + * \param argc The same meaning as in send_option_arg_callback_request(). + * \param argv The same meaning as in send_option_arg_callback_request(). + * \param f The same meaning as in send_option_arg_callback_request(). + * \param result The same meaning as in send_option_arg_callback_request(). * - * \return greater than zero if true, zero otherwise. + * This is similar to send_option_arg_callback_request(), but no options buffer + * is passed to the parent process. * + * \return The return value of the underlying call to + * send_option_arg_callback_request(). */ -unsigned int afs_repos(void) +int send_standard_callback_request(int argc, char * const * const argv, + callback_function *f, struct osl_object *result) +{ + return send_option_arg_callback_request(NULL, argc, argv, f, result); +} + +static int action_if_pattern_matches(struct osl_row *row, void *data) { - return mmd->new_afs_status_flags & AFS_REPOS; + struct pattern_match_data *pmd = data; + struct osl_object name_obj; + const char *p, *name; + int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj); + const char *pattern_txt = (const char *)pmd->patterns.data; + + if (ret < 0) + return ret; + name = (char *)name_obj.data; + if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME)) + return 1; + if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING)) + return pmd->action(pmd->table, row, name, pmd->data); + for (p = pattern_txt; p < pattern_txt + pmd->patterns.size; + p += strlen(p) + 1) { + ret = fnmatch(p, name, pmd->fnmatch_flags); + if (ret == FNM_NOMATCH) + continue; + if (ret) + return -E_FNMATCH; + return pmd->action(pmd->table, row, name, pmd->data); + } + return 1; +} + +int for_each_matching_row(struct pattern_match_data *pmd) +{ + if (pmd->pm_flags & PM_REVERSE_LOOP) + return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd, + action_if_pattern_matches); + return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd, + action_if_pattern_matches); } /** - * check if audio file sender is paused + * Compare two osl objects of string type. + * + * \param obj1 Pointer to the first object. + * \param obj2 Pointer to the second object. + * + * In any case, only \p MIN(obj1->size, obj2->size) characters of each string + * are taken into account. * - * \return greater than zero if paused, zero otherwise. + * \return It returns an integer less than, equal to, or greater than zero if + * \a obj1 is found, respectively, to be less than, to match, or be greater than + * obj2. * + * \sa strcmp(3), strncmp(3), osl_compare_func. + */ +int string_compare(const struct osl_object *obj1, const struct osl_object *obj2) +{ + const char *str1 = (const char *)obj1->data; + const char *str2 = (const char *)obj2->data; + return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size)); +} + +/* + * write input from fd to dynamically allocated buffer, + * but maximal max_size byte. */ -unsigned int afs_paused(void) +static int fd2buf(int fd, unsigned max_size, struct osl_object *obj) { - return !(mmd->new_afs_status_flags & AFS_NEXT) - && !(mmd->new_afs_status_flags & AFS_PLAYING); + const size_t chunk_size = 1024; + size_t size = 2048, received = 0; + int ret; + char *buf = para_malloc(size); + + for (;;) { + ret = recv_bin_buffer(fd, buf + received, chunk_size); + if (ret <= 0) + break; + received += ret; + if (received + chunk_size >= size) { + size *= 2; + ret = -E_INPUT_TOO_LARGE; + if (size > max_size) + break; + buf = para_realloc(buf, size); + } + } + obj->data = buf; + obj->size = received; + if (ret < 0) + free(buf); + return ret; } /** - * get the name of the given audio format - * \param i the audio format number + * Read data from a file descriptor, and send it to the afs process. + * + * \param fd File descriptor to read data from. + * \param arg_obj Pointer to the arguments to \a f. + * \param f The callback function. + * \param max_len Don't read more than that many bytes from stdin. + * \param result The result of the query is stored here. * - * This returns a pointer to statically allocated memory so it - * must not be freed by the caller. + * This function is used by commands that wish to let para_server store + * arbitrary data specified by the user (for instance the add_blob family of + * commands). First, at most \a max_len bytes are read from \a fd, the result + * is concatenated with the buffer given by \a arg_obj, and the combined buffer + * is made available to the parent process via shared memory. + * + * \return Negative on errors, the return value of the underlying call to + * send_callback_request() otherwise. */ -const char *audio_format_name(int i) +int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f, + unsigned max_len, struct osl_object *result) { - return i >= 0? afl[i].name : "(none)"; + struct osl_object query, stdin_obj; + int ret; + + ret = send_buffer(fd, AWAITING_DATA_MSG); + if (ret < 0) + return ret; + ret = fd2buf(fd, max_len, &stdin_obj); + if (ret < 0) + return ret; + query.size = arg_obj->size + stdin_obj.size; + query.data = para_malloc(query.size); + memcpy(query.data, arg_obj->data, arg_obj->size); + memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size); + free(stdin_obj.data); + ret = send_callback_request(f, &query, result); + free(query.data); + return ret; } /** - * initialize the audio file sender + * Open the audio file with highest score. + * + * \param afd Audio file data is returned here. * - * Call the init functions of all supported audio format handlers and - * initialize all supported senders. + * This stores all information for streaming the "best" audio file + * in the \a afd structure. + * + * \return Positive on success, negative on errors. + * + * \sa close_audio_file(), open_and_update_audio_file(). */ -void afs_init(void) +int open_next_audio_file(struct audio_file_data *afd) { - int i; - char *hn = para_hostname(), *home = para_homedir(); - - PARA_DEBUG_LOG("supported audio formats: %s\n", - SUPPORTED_AUDIO_FORMATS); - for (i = 0; afl[i].name; i++) { - PARA_NOTICE_LOG("initializing %s handler\n", - afl[i].name); - afl[i].init(&afl[i]); - } - ms2tv(conf.announce_time_arg, &announce_tv); - PARA_INFO_LOG("announce timeval: %lums\n", tv2ms(&announce_tv)); - for (i = 0; senders[i].name; i++) { - PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name); - senders[i].init(&senders[i]); + struct osl_row *aft_row; + int ret; + for (;;) { + ret = score_get_best(&aft_row, &afd->score); + if (ret < 0) + return ret; + ret = open_and_update_audio_file(aft_row, afd); + if (ret >= 0) + return ret; } - free(hn); - free(home); } -static int get_file_info(int i) +/** + * Free all resources which were allocated by open_next_audio_file(). + * + * \param afd The structure previously filled in by open_next_audio_file(). + * + * \return The return value of the underlying call to para_munmap(). + * + * \sa open_next_audio_file(). + */ +int close_audio_file(struct audio_file_data *afd) { - return afl[i].get_file_info(audio_file, mmd->audio_file_info, - &mmd->chunks_total, &mmd->seconds_total); + free(afd->afhi.chunk_table); + return para_munmap(afd->map.data, afd->map.size); } -/* - * guess the audio format judging from filename - * \param name the filename - * - * \return This function returns -1 if it has no idea what kind of audio - * file this might be. Otherwise the (non-negative) number of the audio format - * is returned. - */ -static int guess_audio_format(const char *name) +#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 - int i, len1 = strlen(name), len2; - for (i = 0; afl[i].name; i++) { - len2 = strlen(afl[i].name); - if (len1 < len2) - continue; - if (!strncasecmp(name + (len1 - len2), afl[i].name, len2)) { - PARA_DEBUG_LOG("might be %s\n", afl[i].name); - return i; +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 (ret >= 0) { + if (given_playlist) + PARA_WARNING_LOG("ignoring playlist %s\n", + given_playlist); + return PLAY_MODE_MOOD; } } - return -1; + if (given_playlist) { + ret = playlist_open(given_playlist); + if (ret >= 0) + return PLAY_MODE_PLAYLIST; + } + ret = change_current_mood(NULL); /* open first available mood */ + if (ret >= 0) + return PLAY_MODE_MOOD; + change_current_mood(""); /* open dummy mood, always successful */ + return PLAY_MODE_MOOD; } -static int get_audio_format(int omit) +static int setup_command_socket_or_die(void) { - int i; - - for (i = 0; afl[i].name; i++) { - if (i == omit || !afl[i].get_file_info) - continue; - rewind(audio_file); - if (get_file_info(i) > 0) - return i; - rewind(audio_file); + int ret; + char *socket_name = conf.afs_socket_arg; + struct sockaddr_un unix_addr; + + unlink(socket_name); + ret = create_local_socket(socket_name, &unix_addr, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH); + if (ret < 0) { + PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret), socket_name); + exit(EXIT_FAILURE); } - return -E_AUDIO_FORMAT; + if (listen(ret , 5) < 0) { + PARA_EMERG_LOG("%s", "can not listen on socket\n"); + exit(EXIT_FAILURE); + } + PARA_INFO_LOG("listening on command socket %s (fd %d)\n", socket_name, + ret); + return ret; } -/* - * upddate shared mem - */ -static int update_mmd(void) +static int server_socket; +static struct command_task command_task_struct; +static struct signal_task signal_task_struct; + +static void unregister_tasks(void) { - int i; - struct stat file_status; - - i = guess_audio_format(mmd->filename); - if (i < 0 || get_file_info(i) < 0) - i = get_audio_format(i); - if (i < 0) - return i; - mmd->audio_format = i; - mmd->chunks_sent = 0; - mmd->current_chunk = 0; - mmd->offset = 0; - if (fstat(fileno(audio_file), &file_status) == -1) - return -E_FSTAT; - mmd->size = file_status.st_size; - mmd->mtime = file_status.st_mtime; - mmd->events++; - PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename); - return 1; + unregister_task(&command_task_struct.task); + unregister_task(&signal_task_struct.task); } -static void get_song(void) +static void close_afs_tables(enum osl_close_flags flags) { - char **sl = selectors[mmd->selector_num].get_audio_file_list(10); - int i; - - if (!sl) - goto err_out; - for (i = 0; sl[i]; i++) { - struct timeval now; - PARA_INFO_LOG("trying %s\n", sl[i]); - if (strlen(sl[i]) >= _POSIX_PATH_MAX) - continue; - audio_file = fopen(sl[i], "r"); - if (!audio_file) - continue; - strcpy(mmd->filename, sl[i]); - if (update_mmd() < 0) { - fclose(audio_file); - audio_file = NULL; - continue; - } - mmd->num_played++; - if (selectors[mmd->selector_num].update_audio_file) - selectors[mmd->selector_num].update_audio_file(sl[i]); - PARA_DEBUG_LOG("%s", "success\n"); - mmd->new_afs_status_flags &= (~AFS_NEXT); - gettimeofday(&now, NULL); - tv_add(&now, &announce_tv, &data_send_barrier); - - goto free; - } - PARA_ERROR_LOG("%s", "no valid files found\n"); -err_out: - mmd->new_afs_status_flags = AFS_NEXT; -free: - if (sl) { - for (i = 0; sl[i]; i++) - free(sl[i]); - free(sl); - } + PARA_NOTICE_LOG("closing afs_tables\n"); + score_shutdown(flags); + attribute_shutdown(flags); + close_current_mood(); + playlist_close(); + moods_shutdown(flags); + playlists_shutdown(flags); + lyrics_shutdown(flags); + images_shutdown(flags); + aft_shutdown(flags); } -static int chk_barrier(const char *bname, const struct timeval *now, - const struct timeval *barrier, struct timeval *diff, int log) +static void signal_pre_select(struct sched *s, struct task *t) { - long ms; + struct signal_task *st = t->private_data; + t->ret = 1; + para_fd_set(st->fd, &s->rfds, &s->max_fileno); +} - if (tv_diff(now, barrier, diff) > 0) - return 1; - ms = tv2ms(diff); - if (log && ms) - PARA_DEBUG_LOG("%s barrier: %lims left\n", bname, ms); - return -1; +static void signal_post_select(struct sched *s, struct task *t) +{ + struct signal_task *st = t->private_data; + t->ret = 1; + if (!FD_ISSET(st->fd, &s->rfds)) + return; + st->signum = para_next_signal(); + t->ret = 1; + if (st->signum == SIGUSR1) + return; /* ignore SIGUSR1 */ + PARA_NOTICE_LOG("caught signal %d\n", st->signum); + t->ret = -E_SIGNAL_CAUGHT; + unregister_tasks(); +} + +static void register_signal_task(void) +{ + struct signal_task *st = &signal_task_struct; + st->fd = para_signal_init(); + PARA_INFO_LOG("signal pipe: fd %d\n", st->fd); + para_install_sighandler(SIGINT); + para_install_sighandler(SIGTERM); + para_install_sighandler(SIGPIPE); + + st->task.pre_select = signal_pre_select; + st->task.post_select = signal_post_select; + st->task.private_data = st; + sprintf(st->task.status, "signal task"); + register_task(&st->task); } -static void afs_next_chunk_time(struct timeval *due) +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 timeval tmp; + struct command_task *ct = t->private_data; + struct afs_client *client; - tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp); - tv_add(&tmp, &mmd->stream_start, due); + 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; } /* - * != NULL: timeout for next chunk - * NULL: nothing to do + * On errors, negative value is written to fd. + * On success: If query produced a result, the result_shmid is written to fd. + * Otherwise, zero is written. */ -static struct timeval *afs_compute_timeout(void) +static int call_callback(int fd, int query_shmid) { - static struct timeval the_timeout; - struct timeval now, next_chunk; - - if (afs_next() && mmd->audio_format >= 0) { - /* only sleep a bit, nec*/ - the_timeout.tv_sec = 0; - the_timeout.tv_usec = 100; - return &the_timeout; + void *query_shm, *result_shm; + struct callback_query *cq; + struct callback_result *cr; + struct osl_object query, result = {.data = NULL}; + int result_shmid = -1, ret, ret2; + + ret = shm_attach(query_shmid, ATTACH_RW, &query_shm); + if (ret < 0) + goto out; + cq = query_shm; + query.data = (char *)query_shm + sizeof(*cq); + query.size = cq->query_size; + ret = cq->handler(&query, &result); + ret2 = shm_detach(query_shm); + if (ret2 < 0 && ret >= 0) + ret = ret2; + if (ret < 0) + goto out; + ret = 0; + if (!result.data || !result.size) + goto out; + ret = shm_new(result.size + sizeof(struct callback_result)); + if (ret < 0) + goto out; + result_shmid = ret; + ret = shm_attach(result_shmid, ATTACH_RW, &result_shm); + if (ret < 0) + goto out; + cr = result_shm; + cr->result_size = result.size; + memcpy(result_shm + sizeof(*cr), result.data, result.size); + ret = shm_detach(result_shm); + if (ret < 0) + goto out; + ret = result_shmid; +out: + free(result.data); + ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int)); + if (ret < 0 || ret2 < 0) { + if (result_shmid >= 0) + if (shm_destroy(result_shmid) < 0) + PARA_ERROR_LOG("destroy result failed\n"); + if (ret >= 0) + ret = ret2; } - gettimeofday(&now, NULL); - if (chk_barrier("eof", &now, &eof_barrier, &the_timeout, 1) < 0) - return &the_timeout; - if (chk_barrier("data send", &now, &data_send_barrier, - &the_timeout, 1) < 0) - return &the_timeout; - if (mmd->audio_format < 0 || !afs_playing() || !audio_file) - return NULL; - afs_next_chunk_time(&next_chunk); - if (chk_barrier(afl[mmd->audio_format].name, &now, &next_chunk, - &the_timeout, 0) < 0) - return &the_timeout; - /* chunk is due or bof */ - the_timeout.tv_sec = 0; - the_timeout.tv_usec = 0; - return &the_timeout; + return ret; } -static void afs_eof(struct audio_format_handler *af) +static void execute_afs_command(int fd, uint32_t expected_cookie) { - struct timeval now; - int i; - char *tmp; + uint32_t cookie; + int query_shmid; + char buf[sizeof(cookie) + sizeof(query_shmid)]; + int ret = recv_bin_buffer(fd, buf, sizeof(buf)); - if (!af || !audio_file) { - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); + if (ret < 0) { + PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret)); + return; + } + if (ret != sizeof(buf)) { + PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n", + ret, (long unsigned) sizeof(buf)); + return; + } + cookie = *(uint32_t *)buf; + if (cookie != expected_cookie) { + PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n", + (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); return; } - gettimeofday(&now, NULL); - tv_add(&af->eof_tv, &now, &eof_barrier); - af->close_audio_file(); - audio_file = NULL; - mmd->audio_format = -1; - af = NULL; - mmd->chunks_sent = 0; - mmd->offset = 0; - mmd->seconds_total = 0; - tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_INFO1], - status_item_list[SI_AUDIO_INFO2], status_item_list[SI_AUDIO_INFO3]); - strcpy(mmd->audio_file_info, tmp); - free(tmp); - tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_DBINFO1], - status_item_list[SI_DBINFO2], status_item_list[SI_DBINFO3]); - strcpy(mmd->selector_info, tmp); - free(tmp); - mmd->filename[0] = '\0'; - mmd->size = 0; - mmd->events++; + /* Ignore return value: Errors might be ok here. */ + call_callback(fd, query_shmid); } -/** - * compute the timeout for para_server's main select-loop - * - * This function gets called from para_server to determine the timeout value - * for its main select loop. - * - * Before the timeout is computed, the current afs status flags are evaluated - * and acted upon by calling appropriate functions from the lower layers. - * Possible actions include - * - * - request a new file list from the current dabase tool (audio file change) - * - shutdown of all senders (stop/pause command) - * - repositioning of the stream (ff/jmp command) - * - * \return A pointer to a struct timeval containing the timeout for the next - * chunk of data to be sent, or NULL if we're not sending right now. - */ -struct timeval *afs_preselect(void) +#define AFS_CLIENT_TIMEOUT 3 + +static void command_post_select(struct sched *s, struct task *t) { - struct audio_format_handler *af = NULL; - int i, format; - struct timeval *ret; -again: - format = mmd->audio_format; - if (format >= 0) - af = afl + format; - else - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); - if (afs_next() && af) { - afs_eof(af); - return afs_compute_timeout(); - } - if (afs_paused() || afs_repos()) { - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); - if (af) { - struct timeval now; - gettimeofday(&now, NULL); - if (!afs_paused() || mmd->chunks_sent) - tv_add(&af->eof_tv, &now, &eof_barrier); - if (afs_repos()) - tv_add(&now, &announce_tv, &data_send_barrier); - if (mmd->new_afs_status_flags & AFS_NOMORE) - mmd->new_afs_status_flags = AFS_NEXT; + 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 flodding */ + struct timeval diff; + tv_diff(now, &client->connect_time, &diff); + if (diff.tv_sec < AFS_CLIENT_TIMEOUT) + continue; + PARA_WARNING_LOG("connection timeout\n"); } - mmd->chunks_sent = 0; + close(client->fd); + list_del(&client->node); + free(client); } - if (af && afs_repos() && mmd->current_chunk != mmd->repos_request) - af->reposition_stream(mmd->repos_request); - if (afs_repos()) { - mmd->new_afs_status_flags &= ~(AFS_REPOS); - mmd->current_chunk = mmd->repos_request; + /* 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; } - ret = afs_compute_timeout(); - if (!ret && !audio_file && afs_playing() && - !(mmd->new_afs_status_flags & AFS_NOMORE)) { - PARA_DEBUG_LOG("%s", "ready and playing, but no audio file\n"); - get_song(); - goto again; + 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; +} + +static void register_command_task(uint32_t cookie) +{ + struct command_task *ct = &command_task_struct; + ct->fd = setup_command_socket_or_die(); + ct->cookie = cookie; + + ct->task.pre_select = command_pre_select; + ct->task.post_select = command_post_select; + ct->task.private_data = ct; + sprintf(ct->task.status, "command task"); + register_task(&ct->task); +} + +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; } -/** - * afs_send_chunk - paraslash's main sending function - * - * This function gets called from para_server as soon as the next chunk of - * data should be pushed out. It first calls the read_chunk() function of - * the current audio format handler to obtain a pointer to the data to be - * sent out as well as its length. This information is then passed to each - * supported sender's send() function which does the actual sending. - * - * Return value: Positive return value on success, zero on eof and negative - * on errors. - */ +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; +} -void afs_send_chunk(void) +__noreturn int afs_init(uint32_t cookie, int socket_fd) { - int i; - struct audio_format_handler *af; - char *buf; - ssize_t ret; - struct timeval now, due; + enum play_mode current_play_mode; + struct sched s; + int ret; - if (mmd->audio_format < 0 || !audio_file || !afs_playing()) - return; - af = &afl[mmd->audio_format]; - gettimeofday(&now, NULL); - afs_next_chunk_time(&due); - if (tv_diff(&due, &now, NULL) > 0) - return; - if (chk_barrier("eof", &now, &eof_barrier, &due, 1) < 0) - return; - if (chk_barrier("data send", &now, &data_send_barrier, - &due, 1) < 0) - return; - buf = af->read_chunk(mmd->current_chunk, &ret); - mmd->new_afs_status_flags &= ~AFS_REPOS; - if (!buf) { + INIT_LIST_HEAD(&afs_client_list); + ret = open_afs_tables(); + + if (ret < 0) { + PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret)); + exit(EXIT_FAILURE); + } + server_socket = socket_fd; + ret = mark_fd_nonblock(server_socket); + if (ret < 0) + exit(EXIT_FAILURE); + PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n", + server_socket, (unsigned) cookie); + current_play_mode = init_admissible_files(); + register_tasks(cookie); + s.default_timeout.tv_sec = 0; + s.default_timeout.tv_usec = 99 * 1000; + ret = sched(&s); + if (ret < 0) + PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret)); + close_afs_tables(OSL_MARK_CLEAN); + exit(EXIT_FAILURE); +} + +static int create_tables_callback(const struct osl_object *query, + __a_unused struct osl_object *result) +{ + uint32_t table_mask = *(uint32_t *)query->data; + int i, ret; + + close_afs_tables(OSL_MARK_CLEAN); + for (i = 0; i < NUM_AFS_TABLES; i++) { + struct table_info *ti = afs_tables + i; + + if (ti->flags & TBLFLAG_SKIP_CREATE) + continue; + if (!(table_mask & (1 << i))) + continue; + ret = osl_create_table(ti->desc); if (ret < 0) - mmd->new_afs_status_flags = AFS_NEXT; - else - mmd->new_afs_status_flags |= AFS_NEXT; - afs_eof(af); - return; + return ret; } - if (!mmd->chunks_sent) { - struct timeval tmp; - gettimeofday(&mmd->stream_start, NULL); - tv_scale(mmd->current_chunk, &af->chunk_tv, &tmp); - mmd->offset = tv2ms(&tmp); - mmd->events++; + ret = open_afs_tables(); + return ret < 0? ret: 0; +} + +int com_init(int fd, int argc, char * const * const argv) +{ + int i, j, ret; + uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1; + struct osl_object query = {.data = &table_mask, + .size = sizeof(table_mask)}; + + if (argc != 1) { + table_mask = 0; + for (i = 1; i < argc; i++) { + for (j = 0; j < NUM_AFS_TABLES; j++) { + struct table_info *ti = afs_tables + j; + + if (ti->flags & TBLFLAG_SKIP_CREATE) + continue; + if (strcmp(argv[i], ti->desc->name)) + continue; + table_mask |= (1 << j); + break; + } + if (j == NUM_AFS_TABLES) + return -E_BAD_TABLE_NAME; + } } - for (i = 0; senders[i].name; i++) - senders[i].send(af, mmd->current_chunk, - mmd->chunks_sent, buf, ret); - mmd->new_afs_status_flags |= AFS_PLAYING; - mmd->chunks_sent++; - mmd->current_chunk++; + ret = send_callback_request(create_tables_callback, &query, NULL); + if (ret < 0) + return ret; + return send_va_buffer(fd, "successfully created afs table(s)\n"); +} + +enum com_check_flags { + CHECK_AFT = 1, + CHECK_MOODS = 2, + CHECK_PLAYLISTS = 4 +}; + +int com_check(int fd, int argc, char * const * const argv) +{ + unsigned flags = 0; + int i, ret; + struct osl_object result; + + for (i = 1; i < argc; i++) { + const char *arg = argv[i]; + if (arg[0] != '-') + break; + if (!strcmp(arg, "--")) { + i++; + break; + } + if (!strcmp(arg, "-a")) { + flags |= CHECK_AFT; + continue; + } + if (!strcmp(arg, "-p")) { + flags |= CHECK_PLAYLISTS; + continue; + } + if (!strcmp(arg, "-m")) { + flags |= CHECK_MOODS; + continue; + } + return -E_AFS_SYNTAX; + } + if (i < argc) + return -E_AFS_SYNTAX; + if (!flags) + flags = ~0U; + if (flags & CHECK_AFT) { + ret = send_callback_request(aft_check_callback, NULL, &result); + if (ret < 0) + return ret; + if (ret > 0) { + ret = send_buffer(fd, (char *) result.data); + free(result.data); + if (ret < 0) + return ret; + } + } + if (flags & CHECK_PLAYLISTS) { + ret = send_callback_request(playlist_check_callback, NULL, &result); + if (ret < 0) + return ret; + if (ret > 0) { + ret = send_buffer(fd, (char *) result.data); + free(result.data); + if (ret < 0) + return ret; + } + } + if (flags & CHECK_MOODS) { + ret = send_callback_request(mood_check_callback, NULL, &result); + if (ret < 0) + return ret; + if (ret > 0) { + ret = send_buffer(fd, (char *) result.data); + free(result.data); + if (ret < 0) + return ret; + } + } + return 1; }