X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afs.c;h=0a3d1038560f8591fddc8072d59dd3ef3df7fd78;hp=6c3df15ea814a45d11768cb81c508bf9d0316a72;hb=02691a995a6ee0fe4d9078f1d82465edd4814f74;hpb=3e514007f72825597eaf68ff33339a8eb0ad420b diff --git a/afs.c b/afs.c index 6c3df15e..0a3d1038 100644 --- a/afs.c +++ b/afs.c @@ -1,479 +1,1071 @@ -/* - * Copyright (C) 1997-2006 Andre Noll +#include "para.h" +#include "afh.h" +#include "error.h" +#include /* readdir() */ +#include +#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" + +/** \file afs.c Paraslash's audio file selector. */ + +/** + * Compare two osl objects of string type. * - * 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. + * \param obj1 Pointer to the first object. + * \param obj2 Pointer to the second object. * - * 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. + * In any case, only \p MIN(obj1->size, obj2->size) characters of each string + * are taken into account. * - * 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. - */ - -/** \file afs.c audio file sending functions + * \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. * - * 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. + * \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)); +} -#include /* gettimeofday */ -#include "server.cmdline.h" -#include "db.h" -#include "server.h" -#include "afs.h" -#include "send.h" -#include "error.h" -#include "string.h" - -extern const char *status_item_list[]; +/** 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 +}; -static struct timeval announce_tv; -static struct timeval data_send_barrier; -static struct timeval eof_barrier; +static struct table_info afs_tables[NUM_AFS_TABLES]; -extern struct misc_meta_data *mmd; -extern struct audio_file_selector dblist[]; -extern struct sender senders[]; -extern struct gengetopt_args_info conf; +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; +}; -static FILE *audio_file = NULL; -#if 1 - void mp3_init(void *); -#endif +/** + * 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. + * + * \sa strtol(3), atoi(3). + */ +int para_atol(const char *str, long *result) +{ + char *endptr; + long val; + int ret, base = 10; -#ifdef HAVE_OGGVORBIS - void ogg_init(void *); -#endif + 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; +} /** - * the list of supported audio formats + * Struct to let para_server call a function specified from child context. + * + * Commands that need to change the state of para_server 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 must be used to let + * para_server (i.e. the parent process) call a function specified + * by the child (the command handler). + * + * \sa fork(2), ipc.c. */ -struct audio_format afl[] = { -#if 1 - { - .name = "mp3", - .init = mp3_init, - }, -#endif -#ifdef HAVE_OGGVORBIS - { - .name = "ogg", - .init = ogg_init, - }, -#endif - { - .name = NULL, - } +struct callback_data { + /** The function to be called. */ + callback_function *handler; + /** The sma for the parameters of the callback function. */ + int query_shmid; + /** The size of the query sma. */ + size_t query_size; + /** If the callback produced a result, it is stored in this sma. */ + int result_shmid; + /** The size of the result sma. */ + size_t result_size; + /** The return value of the callback function. */ + int callback_ret; + /** The return value of the callback() procedure. */ + int sma_ret; }; +struct callback_query { + /** The function to be called. */ + callback_function *handler; + /** The number of bytes of the query */ + size_t query_size; +}; + +struct callback_result { + /** The number of bytes of the result. */ + size_t result_size; +}; + +static struct callback_data *shm_callback_data; +static int callback_mutex; +static int child_mutex; +static int result_mutex; /** - * 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 parent process that \a f should be + * called ASAP. It provides proper locking via semaphores to protect against + * concurent access to the shared memory area and against concurrent access by + * another child process that asks to call the same function. * - * \return greater than zero if playing, zero otherwise. + * \return Negative, if the shared memory area could not be set up. The return + * value of the callback function otherwise. * + * \sa shm_new(), shm_attach(), shm_detach(), mutex_lock(), mutex_unlock(), + * shm_destroy(), struct callback_data, 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_data cbd = {.handler = f}; + int ret; + void *query_sma; + + assert(query->data && query->size); + ret = shm_new(query->size); + if (ret < 0) + return ret; + cbd.query_shmid = ret; + cbd.query_size = query->size; + ret = shm_attach(cbd.query_shmid, ATTACH_RW, &query_sma); + if (ret < 0) + goto out; + memcpy(query_sma, query->data, query->size); + ret = shm_detach(query_sma); + if (ret < 0) + goto out; + /* prevent other children from interacting */ + mutex_lock(child_mutex); + /* prevent parent from messing with shm_callback_data. */ + mutex_lock(callback_mutex); + /* all three mutexes are locked, set parameters for callback */ + *shm_callback_data = cbd; + /* unblock parent */ + mutex_unlock(callback_mutex); + kill(getppid(), SIGUSR1); /* wake up parent */ + /* + * At this time only the parent can run. It will execute our callback + * and unlock the result_mutex when ready to indicate that the child + * may use the result. So let's sleep on this mutex. + */ + mutex_lock(result_mutex); + /* No need to aquire the callback mutex again */ + ret = shm_callback_data->sma_ret; + if (ret < 0) /* sma problem, callback might not have been executed */ + goto unlock_child_mutex; + if (shm_callback_data->result_shmid >= 0) { /* parent provided a result */ + void *sma; + ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RO, + &sma); + if (ret >= 0) { + if (result) { /* copy result */ + result->size = shm_callback_data->result_size; + result->data = para_malloc(result->size); + memcpy(result->data, sma, result->size); + ret = shm_detach(sma); + if (ret < 0) + PARA_ERROR_LOG("can not detach result\n"); + } else + PARA_WARNING_LOG("no result pointer\n"); + } else + PARA_ERROR_LOG("attach result failed: %d\n", ret); + if (shm_destroy(shm_callback_data->result_shmid) < 0) + PARA_ERROR_LOG("destroy result failed\n"); + } else { /* no result from callback */ + if (result) { + PARA_WARNING_LOG("callback has no result\n"); + result->data = NULL; + result->size = 0; + } + } + ret = shm_callback_data->callback_ret; +unlock_child_mutex: + /* give other children a chance */ + mutex_unlock(child_mutex); +out: + if (shm_destroy(cbd.query_shmid) < 0) + PARA_ERROR_LOG("%s\n", "shm destroy error"); + 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, 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. + * + * \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, 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); +} + +/* + * write input from fd to dynamically allocated char array, + * but maximal max_size byte. Return size. + */ +static int fd2buf(int fd, char **buf, int max_size) +{ + 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; + } + } + if (ret < 0) { + ret = -E_READ; + goto out; + } + ret = p - *buf; +out: + if (ret < 0 && *buf) + free(*buf); + return ret; } /** - * check if audio file sender is paused + * 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. * - * \return greater than zero if paused, zero otherwise. + * 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. */ -unsigned int afs_paused(void) +int stdin_command(struct osl_object *arg_obj, callback_function *f, + unsigned max_len, struct osl_object *result) { - return !(mmd->new_afs_status_flags & AFS_NEXT) - && !(mmd->new_afs_status_flags & AFS_PLAYING); + 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; } /** - * get the name of the given audio format - * \param i the audio format number + * Open the audio file with highest score. + * + * \param afd Audio file data is returned here. * - * This returns a pointer to statically allocated memory so it - * must not be freed by the caller. + * 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(). */ -const char *audio_format_name(int i) +int open_next_audio_file(struct audio_file_data *afd) { - return i >= 0? afl[i].name : "(none)"; + 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; + } } /** - * initialize the audio file sender + * Free all resources which were allocated by open_next_audio_file(). * - * Call the init functions of all supported audio format handlers and - * initialize all supported senders. + * \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(). */ -void afs_init(void) +int close_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: %lu:%lu\n", announce_tv.tv_sec, announce_tv.tv_usec); - for (i = 0; senders[i].name; i++) { - PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name); - senders[i].init(&senders[i]); - } - free(hn); - free(home); + free(afd->afhi.chunk_table); + return para_munmap(afd->map.data, afd->map.size); } -static int get_file_info(int i) +#if 0 +static void play_loop(enum play_mode current_play_mode) { - return afl[i].get_file_info(audio_file, mmd->audio_file_info, - &mmd->chunks_total, &mmd->seconds_total); + 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 -/* - * 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) + +static enum play_mode init_admissible_files(void) { + int ret; + char *given_mood, *given_playlist; - int i, len1 = strlen(name), len2; + given_mood = "mood_that_was_given_at_the_command_line"; + given_playlist = "given_playlist"; - 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; + 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; } } - return -1; + 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 get_audio_format(int omit) +static int setup_command_socket_or_die(void) { - int i; + int ret; + char *socket_name = "/tmp/afs_command_socket"; + struct sockaddr_un unix_addr; - 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); + 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); } - return -E_AUDIO_FORMAT; + PARA_INFO_LOG("listening on command socket %s (fd %d)\n", socket_name, + ret); + return ret; } -/* - * upddate shared mem - */ -static int update_mmd(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; +static int server_socket; + +void loop(void) +{ + for (;;) + sleep(1); } -static void get_song(void) +static void afs_shutdown(enum osl_close_flags flags) { - char **sl = dblist[mmd->dbt_num].get_audio_file_list(10); - int i; + 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); +} - 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 (dblist[mmd->dbt_num].update_audio_file) - dblist[mmd->dbt_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); +static void signal_pre_select(struct sched *s, struct task *t) +{ + struct signal_task *st = t->private_data; + t->ret = 1; + para_fd_set(st->fd, &s->rfds, &s->max_fileno); +} - 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); - } +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(); + 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; } -static int chk_barrier(const char *bname, const struct timeval *now, - const struct timeval *barrier, struct timeval *diff, int log) +static void register_signal_task(void) { - long ms; + 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); - 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; + 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 void command_pre_select(struct sched *s, struct task *t) { - struct timeval tmp; - - tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp); - tv_add(&tmp, &mmd->stream_start, due); + struct command_task *ct = t->private_data; + t->ret = 1; + para_fd_set(ct->fd, &s->rfds, &s->max_fileno); } /* - * != 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; + 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; - 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; + ret = shm_attach(query_shmid, ATTACH_RO, &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 *af) +static void command_post_select(struct sched *s, struct task *t) { - struct timeval now; - int i; - char *tmp; + 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; - if (!af || !audio_file) { - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); + 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; + t->ret = recv_bin_buffer(ct->fd, buf, sizeof(buf)); + if (t->ret < 0) { + PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret)); + t->ret = 1; + goto out; + } + if (t->ret != sizeof(buf)) { + PARA_NOTICE_LOG("short read (%d bytes, expected %d)\n", + t->ret, sizeof(buf)); + t->ret = 1; + goto out; + } + 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; + } + 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; } - 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->dbinfo, tmp); - free(tmp); - mmd->filename[0] = '\0'; - mmd->size = 0; - mmd->events++; +out: + close(fd); } -/** - * 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) -{ - struct audio_format *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(); +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 register_tasks(uint32_t cookie) +{ + register_signal_task(); + register_command_task(cookie); +} + +__noreturn int afs_init(uint32_t cookie, int socket_fd) +{ + int ret; +// void *shm_area; + 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); + +#if 0 + ret = shm_new(sizeof(struct callback_data)); + if (ret < 0) + return ret; + shmid = ret; + ret = shm_attach(shmid, ATTACH_RW, &shm_area); + if (ret < 0) + return ret; + shm_callback_data = shm_area; + ret = mutex_new(); + if (ret < 0) + return ret; + callback_mutex = ret; + ret = mutex_new(); + if (ret < 0) + return ret; + child_mutex = ret; + ret = mutex_new(); + if (ret < 0) + return ret; + result_mutex = ret; + mutex_lock(result_mutex); +#endif +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) + return ret; } - if (afs_paused() || afs_repos()) { - for (i = 0; senders[i].name; i++) - senders[i].shutdown_clients(); - if (af) { - struct timeval now; - if (!afs_paused() || mmd->chunks_sent) { - gettimeofday(&now, NULL); - 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; + 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; } - mmd->chunks_sent = 0; + if (j == NUM_AFS_TABLES) + return -E_BAD_TABLE_NAME; } - 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; + return 1; +} + +#if 0 +/** Describes a command of para_server. */ +struct command { + /** The name of the command. */ + const char *name; + /** The handler function. */ + int (*handler)(int fd, int argc, const char **argv); +}; + +static struct command afs_cmds[] = { +{ + .name = "add", + .handler = com_add, +}, +{ + .name = "addlyr", + .handler = com_addlyr, +}, +{ + .name = "addimg", + .handler = com_addimg, +}, +{ + .name = "addmood", + .handler = com_addmood, +}, +{ + .name = "addpl", + .handler = com_addpl, +}, +{ + .name = "catlyr", + .handler = com_catlyr, +}, +{ + .name = "catimg", + .handler = com_catimg, +}, +{ + .name = "mvimg", + .handler = com_mvimg, +}, +{ + .name = "mvlyr", + .handler = com_mvlyr, +}, +{ + .name = "mvmood", + .handler = com_mvmood, +}, +{ + .name = "mvpl", + .handler = com_mvpl, +}, +{ + .name = "catmood", + .handler = com_catmood, +}, +{ + .name = "catpl", + .handler = com_catpl, +}, +{ + .name = "rmatt", + .handler = com_rmatt, +}, +{ + .name = "init", + .handler = com_init, +}, +{ + .name = "lsatt", + .handler = com_lsatt, +}, +{ + .name = "ls", + .handler = com_afs_ls, +}, +{ + .name = "lslyr", + .handler = com_lslyr, +}, +{ + .name = "lsimg", + .handler = com_lsimg, +}, +{ + .name = "lsmood", + .handler = com_lsmood, +}, +{ + .name = "lspl", + .handler = com_lspl, +}, +{ + .name = "setatt", + .handler = com_setatt, +}, +{ + .name = "addatt", + .handler = com_addatt, +}, +{ + .name = "rm", + .handler = com_afs_rm, +}, +{ + .name = "rmlyr", + .handler = com_rmlyr, +}, +{ + .name = "rmimg", + .handler = com_rmimg, +}, +{ + .name = "rmmood", + .handler = com_rmmood, +}, +{ + .name = "rmpl", + .handler = com_rmpl, +}, +{ + .name = "touch", + .handler = com_touch, +}, +{ + .name = NULL, +} +}; + +static void call_callback(void) +{ + struct osl_object query, result = {.data = NULL}; + int ret, ret2; + + shm_callback_data->result_shmid = -1; /* no result */ + ret = shm_attach(shm_callback_data->query_shmid, ATTACH_RW, + &query.data); + if (ret < 0) + goto out; + query.size = shm_callback_data->query_size; + shm_callback_data->callback_ret = shm_callback_data->handler(&query, + &result); + if (result.data && result.size) { + void *sma; + ret = shm_new(result.size); + if (ret < 0) + goto detach_query; + shm_callback_data->result_shmid = ret; + shm_callback_data->result_size = result.size; + ret = shm_attach(shm_callback_data->result_shmid, ATTACH_RW, &sma); + if (ret < 0) + goto destroy_result; + memcpy(sma, result.data, result.size); + ret = shm_detach(sma); + if (ret < 0) { + PARA_ERROR_LOG("detach result failed\n"); + goto destroy_result; + } } - 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; + ret = 1; + goto detach_query; +destroy_result: + if (shm_destroy(shm_callback_data->result_shmid) < 0) + PARA_ERROR_LOG("destroy result failed\n"); + shm_callback_data->result_shmid = -1; +detach_query: + free(result.data); + ret2 = shm_detach(query.data); + if (ret2 < 0) { + PARA_ERROR_LOG("detach query failed\n"); + if (ret >= 0) + ret = ret2; } - return ret; +out: + if (ret < 0) + PARA_ERROR_LOG("sma error %d\n", ret); + shm_callback_data->sma_ret = ret; + shm_callback_data->handler = NULL; + mutex_unlock(result_mutex); /* wake up child */ } -/** - * 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 got_sigchld; +static void server_loop(int child_pid) +{ +// int status; -void afs_send_chunk(void) + PARA_DEBUG_LOG("server pid: %d, child pid: %d\n", + getpid(), child_pid); + for (;;) { + mutex_lock(callback_mutex); + if (shm_callback_data->handler) + call_callback(); + mutex_unlock(callback_mutex); + usleep(100); + if (!got_sigchld) + continue; + mutex_destroy(result_mutex); + mutex_destroy(callback_mutex); + mutex_destroy(child_mutex); + afs_shutdown(OSL_MARK_CLEAN); + exit(EXIT_SUCCESS); + } +} + +int main(int argc, const char **argv) { - int i; - struct audio_format *af; - char *buf; - ssize_t ret; - struct timeval now, due; + int i, ret = -E_AFS_SYNTAX; - 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; - buf = af->read_chunk(mmd->current_chunk, &ret); - mmd->new_afs_status_flags &= ~(AFS_NEXT | AFS_REPOS); - if (!buf) { - if (ret < 0) - mmd->new_afs_status_flags = AFS_NEXT; - else - mmd->new_afs_status_flags |= AFS_NEXT; - afs_eof(af); - return; + signal(SIGUSR1, dummy); + signal(SIGCHLD, sigchld_handler); + if (argc < 2) + goto out; + ret = setup(); +// ret = afs_init(); + if (ret < 0) { + PARA_EMERG_LOG("afs_init returned %d\n", ret); + exit(EXIT_FAILURE); } - 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 = fork(); + if (ret < 0) { + ret = -E_FORK; + goto out; } - 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++; + if (ret) + server_loop(ret); + for (i = 0; cmd[i].name; i++) { + if (strcmp(cmd[i].name, argv[1])) + continue; + ret = cmd[i].handler(1, argc - 1 , argv + 1); + goto out; + + } + PARA_ERROR_LOG("unknown command: %s\n", argv[1]); + ret = -1; +out: + if (ret < 0) + PARA_ERROR_LOG("error %d\n", ret); + else + PARA_DEBUG_LOG("%s", "success\n"); + afs_shutdown(0); + return ret < 0? EXIT_FAILURE : EXIT_SUCCESS; } +#endif