X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=afs.c;h=0a3d1038560f8591fddc8072d59dd3ef3df7fd78;hp=f5de6609e4f9c87058676068f3172888106393b9;hb=02691a995a6ee0fe4d9078f1d82465edd4814f74;hpb=1d298ac7426fdc13221f759848dbf766ef606c0b diff --git a/afs.c b/afs.c index f5de6609..0a3d1038 100644 --- a/afs.c +++ b/afs.c @@ -1,107 +1,1071 @@ -/* - * Copyright (C) 2005-2007 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. + * \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)); +} +/** 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 +}; -/** \file afs.c functions common to all audio file selectors */ +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; +}; -#include "server.cmdline.h" -#include "server.h" -#include "vss.h" -#include /* readdir() */ -#include /* stat */ -#include /* mode_t */ -#include "error.h" -#include "string.h" /** - * traverse the given directory recursively + * A wrapper for strtol(3). * - * @param dirname the directory to traverse - * @param f: the function to call for each entry. + * \param str The string to be converted to a long integer. + * \param result The converted value is stored here. * - * for each regular file whose filename ends in .yyy, where yyy is a supported - * audio format, the supplied function \a f is called. The directory and - * filename component of the regular file are passed to \a f. + * \return Positive on success, -E_ATOL on errors. * - * \return On success, 1 is returned. Otherwise, this function returns a - * negative value which indicates the kind of the error. + * \sa strtol(3), atoi(3). */ -int find_audio_files(const char *dirname, int (*f)(const char *, const char *)) +int para_atol(const char *str, long *result) { - DIR *dir = NULL; - struct dirent *entry; + 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; +} + +/** + * 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 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; + +/** + * 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 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(). + */ +int send_callback_request(callback_function *f, struct osl_object *query, + struct osl_object *result) +{ + 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 */ /* - * Opening the current directory (".") and calling fchdir() to return - * is usually faster and more reliable than saving cwd in some buffer - * and calling chdir() afterwards (see man 3 getcwd). + * 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. */ - int cwd_fd = open(".", O_RDONLY); - struct stat s; - int ret = -1; - -// PARA_DEBUG_LOG("dirname: %s\n", dirname); - if (cwd_fd < 0) - return -E_GETCWD; - ret = -E_CHDIR; - if (chdir(dirname) < 0) - goto out; - ret = -E_OPENDIR; - dir = opendir("."); - if (!dir) - goto out; - /* scan cwd recursively */ - while ((entry = readdir(dir))) { - mode_t m; - char *tmp; - - if (!strcmp(entry->d_name, ".")) - continue; - if (!strcmp(entry->d_name, "..")) - continue; - ret = -E_LSTAT; - if (lstat(entry->d_name, &s) == -1) - continue; - m = s.st_mode; - if (!S_ISREG(m) && !S_ISDIR(m)) /* skip links, sockets, ... */ + 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; +} + +/** + * 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. + * + * 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(). + */ +int send_option_arg_callback_request(struct osl_object *options, + int argc, const char **argv, callback_function *f, + struct osl_object *result) +{ + 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; +} + +/** + * 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(). + * + * 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(). + */ +int send_standard_callback_request(int argc, const char **argv, + callback_function *f, struct osl_object *result) +{ + 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; +} + +/** + * 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) +{ + 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; +} + +/** + * Open the audio file with highest score. + * + * \param afd Audio file data is returned here. + * + * 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(). + */ +int open_next_audio_file(struct audio_file_data *afd) +{ + 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 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) +{ + free(afd->afhi.chunk_table); + return para_munmap(afd->map.data, afd->map.size); +} + +#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 + + +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 = mood_open(given_mood); + if (ret >= 0) { + if (given_playlist) + PARA_WARNING_LOG("ignoring playlist %s\n", + given_playlist); + return PLAY_MODE_MOOD; + } + } + 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 setup_command_socket_or_die(void) +{ + int ret; + char *socket_name = "/tmp/afs_command_socket"; + 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 int server_socket; + +void loop(void) +{ + for (;;) + sleep(1); +} + +static void afs_shutdown(enum osl_close_flags flags) +{ + 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 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); +} + +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 void register_signal_task(void) +{ + 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); +} + +static void command_pre_select(struct sched *s, struct task *t) +{ + struct command_task *ct = t->private_data; + t->ret = 1; + para_fd_set(ct->fd, &s->rfds, &s->max_fileno); +} + +/* + * 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 int call_callback(int fd, int query_shmid) +{ + 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_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; + } + 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; + 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; + } +out: + close(fd); +} + +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; - if (S_ISREG(m)) { /* regular file */ - if (guess_audio_format(entry->d_name) < 0) + ret = osl_create_table(ti->desc); + if (ret < 0) + return ret; + } + 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; - ret = f(dirname, entry->d_name); + PARA_NOTICE_LOG("creating table %s\n", argv[i]); + ret = osl_create_table(ti->desc); if (ret < 0) - goto out; - continue; + return ret; + break; } - /* directory */ - tmp = make_message("%s/%s", dirname, entry->d_name); - ret = find_audio_files(tmp, f); - free(tmp); + if (j == NUM_AFS_TABLES) + return -E_BAD_TABLE_NAME; + } + 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 out; + 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 = 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; + } out: - if (dir) - closedir(dir); - if (fchdir(cwd_fd) < 0) - ret = -E_CHDIR; - close(cwd_fd); if (ret < 0) - PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret)); - return ret; + 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 */ +} + +static int got_sigchld; +static void server_loop(int child_pid) +{ +// int status; + + 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, ret = -E_AFS_SYNTAX; + + 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); + } + ret = fork(); + if (ret < 0) { + ret = -E_FORK; + goto out; + } + 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