X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afs.c;h=c726f35f6a3524fa56a8934ae660d62472c8bf45;hp=e3b0db55894dfb4705ed5c052594d6469fb6332d;hb=aea0aba712b2170e2d39ffa1c8f8cb55fc0881bf;hpb=8b2c02c8d6255583982e767374d39375b3380c4d diff --git a/afs.c b/afs.c index e3b0db55..c726f35f 100644 --- a/afs.c +++ b/afs.c @@ -1,529 +1,820 @@ /* - * 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 "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; +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; +}; -#if 1 - void mp3_init(struct audio_format_handler *); -#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; -#ifdef HAVE_OGGVORBIS - void ogg_init(struct audio_format_handler *); -#endif -#ifdef HAVE_FAAD - void aac_afh_init(struct audio_format_handler *); -#endif +/** + * 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 callback_query { + /** The function to be called. */ + callback_function *handler; + /** The number of bytes of the query */ + size_t query_size; +}; /** - * the list of supported audio formats + * 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. */ -static 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_result { + /** The number of bytes of the result. */ + size_t result_size; }; -#define FOR_EACH_AUDIO_FORMAT(i) for (i = 0; afl[i].name; i++) /** - * check if audio file sender is playing + * Ask the parent process to call a given function. * - * \return greater than zero if playing, zero otherwise. + * \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 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)]; +// char *tmpsocket_name; + struct sockaddr_un unix_addr; + + assert(query->data && query->size); + ret = shm_new(query->size + sizeof(*cq)); + 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->size; + + 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 = -E_CONNECT; + if (connect(fd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) /* FIXME: Use para_connect() */ + goto out; + ret = send_bin_buffer(fd, buf, sizeof(buf)); + PARA_NOTICE_LOG("bin buffer ret: %d\n", ret); + if (ret < 0) + goto out; + ret = recv_bin_buffer(fd, buf, sizeof(buf)); + PARA_NOTICE_LOG("ret: %d\n", ret); + if (ret < 0) + goto out; + if (ret != sizeof(int)) { + ret = -E_RECV; + goto out; + } + ret = *(int *) buf; + PARA_NOTICE_LOG("result_shmid: %d\n", ret); + 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. + * + * \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. * - * \return greater than zero if set, zero if not. + * 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, const char **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. * - * \return greater than zero if true, zero otherwise. + * \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(). * + * 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, const char **argv, + callback_function *f, struct osl_object *result) { - return mmd->new_afs_status_flags & AFS_REPOS; + return send_option_arg_callback_request(NULL, argc, argv, f, result); } /** - * 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. */ -unsigned int afs_paused(void) +int string_compare(const struct osl_object *obj1, const struct osl_object *obj2) { - return !(mmd->new_afs_status_flags & AFS_NEXT) - && !(mmd->new_afs_status_flags & AFS_PLAYING); + const char *str1 = (const char *)obj1->data; + const char *str2 = (const char *)obj2->data; + return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size)); } /** - * get the name of the given audio format - * \param i the audio format number + * A wrapper for strtol(3). + * + * \param str The string to be converted to a long integer. + * \param result The converted value is stored here. + * + * \return Positive on success, -E_ATOL on errors. * - * This returns a pointer to statically allocated memory so it - * must not be freed by the caller. + * \sa strtol(3), atoi(3). */ -const char *audio_format_name(int i) +int para_atol(const char *str, long *result) { - return i >= 0? afl[i].name : "(none)"; + char *endptr; + long val; + int ret, base = 10; + + errno = 0; /* To distinguish success/failure after call */ + val = strtol(str, &endptr, base); + ret = -E_ATOL; + if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN)) + goto out; /* overflow */ + if (errno != 0 && val == 0) + goto out; /* other error */ + if (endptr == str) + goto out; /* No digits were found */ + if (*endptr != '\0') + goto out; /* Further characters after number */ + *result = val; + ret = 1; +out: + return ret; } -/** - * initialize the audio file sender - * - * Call the init functions of all supported audio format handlers and - * initialize all supported senders. + +/* + * write input from fd to dynamically allocated char array, + * but maximal max_size byte. Return size. */ -void afs_init(void) +static int fd2buf(int fd, char **buf, int max_size) { - 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]); + const size_t chunk_size = 1024; + size_t size = 2048; + char *p; + int ret; + + *buf = para_malloc(size * sizeof(char)); + p = *buf; + while ((ret = read(fd, p, chunk_size)) > 0) { + p += ret; + if ((p - *buf) + chunk_size >= size) { + char *tmp; + + size *= 2; + if (size > max_size) { + ret = -E_INPUT_TOO_LARGE; + goto out; + } + tmp = para_realloc(*buf, size); + p = (p - *buf) + tmp; + *buf = tmp; + } } - 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]); + if (ret < 0) { + ret = -E_READ; + goto out; } - free(hn); - free(home); + ret = p - *buf; +out: + if (ret < 0 && *buf) + free(*buf); + return ret; } -static int get_file_info(int i) +/** + * Read from stdin, and send the result to the parent process. + * + * \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 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 stdin, 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. + */ +int stdin_command(struct osl_object *arg_obj, callback_function *f, + unsigned max_len, struct osl_object *result) { - return afl[i].get_file_info(audio_file, mmd->audio_file_info, - &mmd->chunks_total, &mmd->seconds_total); + char *stdin_buf; + size_t stdin_len; + struct osl_object query; + int ret = fd2buf(STDIN_FILENO, &stdin_buf, max_len); + + if (ret < 0) + return ret; + stdin_len = ret; + query.size = arg_obj->size + stdin_len; + query.data = para_malloc(query.size); + memcpy(query.data, arg_obj->data, arg_obj->size); + memcpy((char *)query.data + arg_obj->size, stdin_buf, stdin_len); + free(stdin_buf); + ret = send_callback_request(f, &query, result); + free(query.data); + return ret; } /** - * guess the audio format judging from filename + * Open the audio file with highest score. + * + * \param afd Audio file data is returned here. * - * \param name the filename + * This stores all information for streaming the "best" audio file + * in the \a afd structure. * - * \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. + * \return Positive on success, negative on errors. + * + * \sa close_audio_file(), open_and_update_audio_file(). */ -int guess_audio_format(const char *name) +int open_next_audio_file(struct audio_file_data *afd) { - int i,j, len = strlen(name); - - FOR_EACH_AUDIO_FORMAT(i) { - for (j = 0; afl[i].suffixes[j]; j++) { - const char *p = afl[i].suffixes[j]; - int plen = strlen(p); - if (len < plen + 1) - continue; - if (name[len - plen - 1] != '.') - continue; - if (strcasecmp(name + len - plen, p)) - continue; - PARA_DEBUG_LOG("might be %s\n", audio_format_name(i)); - return 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; } - return -1; } -static int get_audio_format(int omit) +/** + * 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) { - int i; - - FOR_EACH_AUDIO_FORMAT(i) { - if (i == omit || !afl[i].get_file_info) - continue; - rewind(audio_file); - if (get_file_info(i) > 0) - return i; - rewind(audio_file); - } - return -E_AUDIO_FORMAT; + free(afd->afhi.chunk_table); + return para_munmap(afd->map.data, afd->map.size); } -/* - * upddate shared mem - */ -static int update_mmd(void) +#if 0 +static void play_loop(enum play_mode current_play_mode) { - 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; + int i, ret; + struct audio_file_data afd; + + afd.current_play_mode = current_play_mode; + for (i = 0; i < 0; i++) { + ret = open_next_audio_file(&afd); + if (ret < 0) { + PARA_ERROR_LOG("failed to open next audio file: %d\n", ret); + return; + } + PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score); + sleep(1); + close_audio_file(&afd); + } } +#endif -static void get_song(void) + +static enum play_mode init_admissible_files(void) { - 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; + 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 = mood_open(given_mood); + if (ret >= 0) { + if (given_playlist) + PARA_WARNING_LOG("ignoring playlist %s\n", + given_playlist); + return PLAY_MODE_MOOD; } - 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); + if (given_playlist) { + ret = playlist_open(given_playlist); + if (ret >= 0) + return PLAY_MODE_PLAYLIST; } + ret = mood_open(NULL); /* open first available mood */ + if (ret >= 0) + return PLAY_MODE_MOOD; + mood_open(""); /* open dummy mood, always successful */ + return PLAY_MODE_MOOD; } -static int chk_barrier(const char *bname, const struct timeval *now, - const struct timeval *barrier, struct timeval *diff, int log) +static int setup_command_socket_or_die(void) { - long ms; - - 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; + 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) + exit(EXIT_FAILURE); + 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; } -static void afs_next_chunk_time(struct timeval *due) -{ - struct timeval tmp; +static int server_socket; - tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp); - tv_add(&tmp, &mmd->stream_start, due); +void loop(void) +{ + for (;;) + sleep(1); } -/* - * != NULL: timeout for next chunk - * NULL: nothing to do - */ -static struct timeval *afs_compute_timeout(void) +static void afs_shutdown(enum osl_close_flags flags) { - 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; - } - 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; + PARA_NOTICE_LOG("cleaning up\n"); + score_shutdown(flags); + attribute_shutdown(flags); + mood_close(); + playlist_close(); + moods_shutdown(flags); + playlists_shutdown(flags); + lyrics_shutdown(flags); + images_shutdown(flags); + aft_shutdown(flags); } -static void afs_eof(struct audio_format_handler *af) +static void signal_pre_select(struct sched *s, struct task *t) { - struct timeval now; - int i; - char *tmp; + struct signal_task *st = t->private_data; + t->ret = 1; + para_fd_set(st->fd, &s->rfds, &s->max_fileno); +} - if (!af || !audio_file) { - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); +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; - } - 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++; + st->signum = para_next_signal(); + PARA_NOTICE_LOG("caught signal %d\n", st->signum); + t->ret = 1; + if (st->signum == SIGUSR1) + return; /* ignore SIGUSR1 */ + afs_shutdown(OSL_MARK_CLEAN); + t->ret = -E_SIGNAL_CAUGHT; } -/** - * get the header and of the current audio file - * - * \param header_len the length of the header is stored here - * - * \return a pointer to a buffer containing the header, or NULL, if no audio - * file is selected or if the current audio format does not need special header - * treamtment. - * - */ -char *afs_get_header(int *header_len) +static void register_signal_task(void) { - *header_len = 0; - if (mmd->audio_format < 0) - return NULL; - if (!afl[mmd->audio_format].get_header_info) - return NULL; - return afl[mmd->audio_format].get_header_info(header_len); + static struct signal_task signal_task_struct; + 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); } -/** - * get the chunk time of the current audio file - * - * \return a pointer to a struct containing the chunk time, or NULL, - * if currently no audio file is selected. - */ -struct timeval *afs_chunk_time(void) +static void command_pre_select(struct sched *s, struct task *t) { - if (mmd->audio_format < 0) - return NULL; - return &afl[mmd->audio_format].chunk_tv; + struct command_task *ct = t->private_data; + t->ret = 1; + para_fd_set(ct->fd, &s->rfds, &s->max_fileno); } -/** - * 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. +/* + * 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. */ -struct timeval *afs_preselect(void) +static int call_callback(int fd, int query_shmid) { - 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(); + 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; } - 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; - } - mmd->chunks_sent = 0; + return ret; +} + +static void command_post_select(struct sched *s, struct task *t) +{ + struct command_task *ct = t->private_data; + struct sockaddr_un unix_addr; + char buf[sizeof(uint32_t) + sizeof(int)]; + uint32_t cookie; + int query_shmid, fd; + + t->ret = 1; + if (!FD_ISSET(ct->fd, &s->rfds)) + return; + t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr)); + if (t->ret < 0) + return; + /* + * The following errors may be caused by a malicious local user. So do + * not return an error in this case as this would terminate para_afs + * and para_server. + */ + fd = t->ret; + /* FIXME: This is easily dosable (peer doesn't send data) */ + t->ret = recv_bin_buffer(fd, buf, sizeof(buf)); + if (t->ret < 0) { + PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret); + t->ret = 1; + goto out; } - 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; + if (t->ret != sizeof(buf)) { + PARA_NOTICE_LOG("short read (%d bytes, expected %d)\n", + t->ret, sizeof(buf)); + t->ret = 1; + 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; + cookie = *(uint32_t *)buf; + if (cookie != ct->cookie) { + PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n", + (unsigned)cookie, (unsigned)ct->cookie); + t->ret = 1; + goto out; } - return ret; + query_shmid = *(int *)(buf + sizeof(cookie)); + if (query_shmid < 0) { + PARA_WARNING_LOG("received invalid query shmid %d)\n", + query_shmid); + t->ret = 1; + goto out; + } + t->ret = call_callback(fd, query_shmid); + if (t->ret < 0) { + PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret)); + t->ret = 1; + goto out; + } +out: + close(fd); } -/** - * 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 void register_command_task(uint32_t cookie) +{ + static struct command_task command_task_struct; + 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 afs_send_chunk(void) +void register_tasks(uint32_t cookie) { - int i; - struct audio_format_handler *af; - char *buf; - ssize_t ret; - struct timeval now, due; + register_signal_task(); + register_command_task(cookie); +} - 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) { +__noreturn int afs_init(uint32_t cookie, int socket_fd) +{ + int ret; + enum play_mode current_play_mode; + struct sched s; + + server_socket = socket_fd; + PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n", + server_socket, (unsigned) cookie); + + ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES]); + if (ret < 0) + goto attribute_init_error; + ret = moods_init(&afs_tables[TBLNUM_MOODS]); + if (ret < 0) + goto moods_init_error; + ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST]); + if (ret < 0) + goto playlists_init_error; + ret = lyrics_init(&afs_tables[TBLNUM_LYRICS]); + if (ret < 0) + goto lyrics_init_error; + ret = images_init(&afs_tables[TBLNUM_IMAGES]); + if (ret < 0) + goto images_init_error; + ret = score_init(&afs_tables[TBLNUM_SCORES]); + if (ret < 0) + goto score_init_error; + ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES]); + if (ret < 0) + goto aft_init_error; + + current_play_mode = init_admissible_files(); + register_tasks(cookie); + s.default_timeout.tv_sec = 0; + s.default_timeout.tv_usec = 99 * 1000; + sched(&s); + +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); +attribute_init_error: + exit(EXIT_FAILURE); +} + +static int create_all_tables(void) +{ + int i, ret; + + for (i = 0; i < NUM_AFS_TABLES; i++) { + struct table_info *ti = afs_tables + i; + + if (ti->flags & TBLFLAG_SKIP_CREATE) + 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++; + return 1; +} + +/* TODO load tables after init */ +int com_init(__a_unused int fd, int argc, const char **argv) +{ + int i, j, ret; + if (argc == 1) + return create_all_tables(); + 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; + PARA_NOTICE_LOG("creating table %s\n", argv[i]); + ret = osl_create_table(ti->desc); + if (ret < 0) + return ret; + break; + } + if (j == NUM_AFS_TABLES) + return -E_BAD_TABLE_NAME; } - for (i = 0; senders[i].name; i++) - senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, ret); - mmd->new_afs_status_flags |= AFS_PLAYING; - mmd->chunks_sent++; - mmd->current_chunk++; + return 1; }