/*
- * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
*
- * 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 <sys/time.h> /* gettimeofday */
+#include <signal.h>
+#include <fnmatch.h>
#include "server.cmdline.h"
-#include "db.h"
+#include "para.h"
+#include "afh.h"
#include "server.h"
-#include "afs.h"
-#include "send.h"
#include "error.h"
+#include <dirent.h> /* readdir() */
+#include <sys/mman.h>
+#include <sys/time.h>
+#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 dblist[];
-extern struct sender senders[];
-extern struct gengetopt_args_info conf;
-
-static FILE *audio_file = NULL;
-
-#if 1
- void mp3_init(void *);
-#endif
+static struct table_info afs_tables[NUM_AFS_TABLES];
+
+struct command_task {
+ /** The file descriptor for the local socket. */
+ int fd;
+ /**
+ * Value sent by the command handlers to identify themselves as
+ * children of the running para_server.
+ */
+ uint32_t cookie;
+ /** The associated task structure. */
+ struct task task;
+};
-#ifdef HAVE_OGGVORBIS
- void ogg_init(void *);
-#endif
+/**
+ * A random number used to "authenticate" the connection.
+ *
+ * para_server picks this number by random before forking the afs process. The
+ * command handlers write this number together with the id of the shared memory
+ * area containing the query. This way, a malicious local user has to know this
+ * number to be able to cause the afs process to crash by sending fake queries.
+ */
+extern uint32_t afs_socket_cookie;
/**
- * the list of supported audio formats
+ * Struct to let command handlers execute a callback in afs context.
+ *
+ * Commands that need to change the state of afs can't change the relevant data
+ * structures directly because commands are executed in a child process, i.e.
+ * they get their own virtual address space.
+ *
+ * This structure is used by \p send_callback_request() (executed from handler
+ * context) in order to let the afs process call the specified function. An
+ * instance of that structure is written to a shared memory area together with
+ * the arguments to the callback function. The identifier of the shared memory
+ * area is written to the command socket.
+ *
+ * The afs process accepts connections on the command socket and reads the
+ * shared memory id, attaches the corresponing area, calls the given handler to
+ * perform the desired action and to optionally compute a result.
+ *
+ * The result and a \p callback_result structure is then written to another
+ * shared memory area. The identifier for that area is written to the handler's
+ * command socket, so that the handler process can read the id, attach the
+ * shared memory area and use the result.
+ *
+ * \sa struct callback_result.
*/
-struct audio_format afl[] = {
-#if 1
- {
- .name = "mp3",
- .init = mp3_init,
- },
-#endif
-#ifdef HAVE_OGGVORBIS
- {
- .name = "ogg",
- .init = ogg_init,
- },
-#endif
- {
- .name = NULL,
- }
+struct callback_query {
+ /** The function to be called. */
+ callback_function *handler;
+ /** The number of bytes of the query */
+ size_t query_size;
};
+/**
+ * Structure embedded in the result of a callback.
+ *
+ * If the callback produced a result, an instance of that structure is embeeded
+ * into the shared memory area holding the result, mainly to let the command
+ * handler know the size of the result.
+ *
+ * \sa struct callback_query.
+ */
+struct callback_result {
+ /** The number of bytes of the result. */
+ size_t result_size;
+};
/**
- * check if audio file sender is playing
+ * Ask the parent process to call a given function.
+ *
+ * \param f The function to be called.
+ * \param query Pointer to arbitrary data for the callback.
+ * \param result Callback result will be stored here.
+ *
+ * This function creates a shared memory area, copies the buffer pointed to by
+ * \a buf to that area and notifies the afs process that \a f should be
+ * called ASAP.
*
- * \return greater than zero if playing, zero otherwise.
+ * \return Negative, on errors, the return value of the callback function
+ * otherwise.
*
+ * \sa send_option_arg_callback_request(), send_standard_callback_request().
*/
-unsigned int afs_playing(void)
+int send_callback_request(callback_function *f, struct osl_object *query,
+ struct osl_object *result)
{
- return mmd->new_afs_status_flags & AFS_PLAYING;
+ struct callback_query *cq;
+ struct callback_result *cr;
+ int ret, fd = -1, query_shmid, result_shmid;
+ void *query_shm, *result_shm;
+ char buf[sizeof(afs_socket_cookie) + sizeof(int)];
+ struct sockaddr_un unix_addr;
+ size_t query_shm_size = sizeof(*cq);
+
+ if (query)
+ query_shm_size += query->size;
+ ret = shm_new(query_shm_size);
+ if (ret < 0)
+ return ret;
+ query_shmid = ret;
+ ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
+ if (ret < 0)
+ goto out;
+ cq = query_shm;
+ cq->handler = f;
+ cq->query_size = query_shm_size - sizeof(*cq);
+
+ if (query)
+ memcpy(query_shm + sizeof(*cq), query->data, query->size);
+ ret = shm_detach(query_shm);
+ if (ret < 0)
+ goto out;
+
+ *(uint32_t *) buf = afs_socket_cookie;
+ *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid;
+
+ ret = get_stream_socket(PF_UNIX);
+ if (ret < 0)
+ goto out;
+ fd = ret;
+ ret = init_unix_addr(&unix_addr, conf.afs_socket_arg);
+ if (ret < 0)
+ goto out;
+ ret = PARA_CONNECT(fd, &unix_addr);
+ if (ret < 0)
+ goto out;
+ ret = send_bin_buffer(fd, buf, sizeof(buf));
+ if (ret < 0)
+ goto out;
+ ret = recv_bin_buffer(fd, buf, sizeof(buf));
+ if (ret < 0)
+ goto out;
+ if (ret != sizeof(int)) {
+ ret = -E_RECV;
+ goto out;
+ }
+ ret = *(int *) buf;
+ if (ret <= 0)
+ goto out;
+ result_shmid = ret;
+ ret = shm_attach(result_shmid, ATTACH_RO, &result_shm);
+ if (ret >= 0) {
+ assert(result);
+ cr = result_shm;
+ result->size = cr->result_size;
+ result->data = para_malloc(result->size);
+ memcpy(result->data, result_shm + sizeof(*cr), result->size);
+ ret = shm_detach(result_shm);
+ if (ret < 0)
+ PARA_ERROR_LOG("can not detach result\n");
+ } else
+ PARA_ERROR_LOG("attach result failed: %d\n", ret);
+ if (shm_destroy(result_shmid) < 0)
+ PARA_ERROR_LOG("destroy result failed\n");
+ ret = 1;
+out:
+ if (shm_destroy(query_shmid) < 0)
+ PARA_ERROR_LOG("%s\n", "shm destroy error");
+ if (fd >= 0)
+ close(fd);
+// PARA_DEBUG_LOG("callback_ret: %d\n", ret);
+ return ret;
}
/**
- * check if 'next' flag is set afs_status_flags
+ * Send a callback request passing an options structure and an argument vector.
*
- * \return greater than zero if set, zero if not.
+ * \param options pointer to an arbitrary data structure.
+ * \param argc Argument count.
+ * \param argv Standard argument vector.
+ * \param f The callback function.
+ * \param result The result of the query is stored here.
*
+ * Some commands have a couple of options that are parsed in child context for
+ * syntactic correctness and are stored in a special options structure for that
+ * command. This function allows to pass such a structure together with a list
+ * of further arguments (often a list of audio files) to the parent process.
+ *
+ * \sa send_standard_callback_request(), send_callback_request().
*/
-unsigned int afs_next(void)
+int send_option_arg_callback_request(struct osl_object *options,
+ int argc, char * const * const argv, callback_function *f,
+ struct osl_object *result)
{
- return mmd->new_afs_status_flags & AFS_NEXT;
+ char *p;
+ int i, ret;
+ struct osl_object query = {.size = options? options->size : 0};
+
+ for (i = 0; i < argc; i++)
+ query.size += strlen(argv[i]) + 1;
+ query.data = para_malloc(query.size);
+ p = query.data;
+ if (options) {
+ memcpy(query.data, options->data, options->size);
+ p += options->size;
+ }
+ for (i = 0; i < argc; i++) {
+ strcpy(p, argv[i]); /* OK */
+ p += strlen(argv[i]) + 1;
+ }
+ ret = send_callback_request(f, &query, result);
+ free(query.data);
+ return ret;
}
/**
- * check if a reposition request is pending
+ * Send a callback request with an argument vector only.
+ *
+ * \param argc The same meaning as in send_option_arg_callback_request().
+ * \param argv The same meaning as in send_option_arg_callback_request().
+ * \param f The same meaning as in send_option_arg_callback_request().
+ * \param result The same meaning as in send_option_arg_callback_request().
*
- * \return greater than zero if true, zero otherwise.
+ * This is similar to send_option_arg_callback_request(), but no options buffer
+ * is passed to the parent process.
*
+ * \return The return value of the underlying call to
+ * send_option_arg_callback_request().
*/
-unsigned int afs_repos(void)
+int send_standard_callback_request(int argc, char * const * const argv,
+ callback_function *f, struct osl_object *result)
+{
+ return send_option_arg_callback_request(NULL, argc, argv, f, result);
+}
+
+static int action_if_pattern_matches(struct osl_row *row, void *data)
+{
+ struct pattern_match_data *pmd = data;
+ struct osl_object name_obj;
+ const char *p, *name;
+ int ret = osl_get_object(pmd->table, row, pmd->match_col_num, &name_obj);
+ const char *pattern_txt = (const char *)pmd->patterns.data;
+
+ if (ret < 0)
+ return ret;
+ name = (char *)name_obj.data;
+ if ((!name || !*name) && (pmd->pm_flags & PM_SKIP_EMPTY_NAME))
+ return 1;
+ if (!pmd->patterns.size && (pmd->pm_flags & PM_NO_PATTERN_MATCHES_EVERYTHING))
+ return pmd->action(pmd->table, row, name, pmd->data);
+ for (p = pattern_txt; p < pattern_txt + pmd->patterns.size;
+ p += strlen(p) + 1) {
+ ret = fnmatch(p, name, pmd->fnmatch_flags);
+ if (ret == FNM_NOMATCH)
+ continue;
+ if (ret)
+ return -E_FNMATCH;
+ return pmd->action(pmd->table, row, name, pmd->data);
+ }
+ return 1;
+}
+
+int for_each_matching_row(struct pattern_match_data *pmd)
{
- return mmd->new_afs_status_flags & AFS_REPOS;
+ if (pmd->pm_flags & PM_REVERSE_LOOP)
+ return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches);
+ return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches);
}
/**
- * check if audio file sender is paused
+ * Compare two osl objects of string type.
+ *
+ * \param obj1 Pointer to the first object.
+ * \param obj2 Pointer to the second object.
+ *
+ * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
+ * are taken into account.
*
- * \return greater than zero if paused, zero otherwise.
+ * \return It returns an integer less than, equal to, or greater than zero if
+ * \a obj1 is found, respectively, to be less than, to match, or be greater than
+ * obj2.
*
+ * \sa strcmp(3), strncmp(3), osl_compare_func.
*/
-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));
+}
+
+/*
+ * write input from fd to dynamically allocated buffer,
+ * but maximal max_size byte.
+ */
+static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
+{
+ const size_t chunk_size = 1024;
+ size_t size = 2048, received = 0;
+ int ret;
+ char *buf = para_malloc(size);
+
+ for (;;) {
+ ret = recv_bin_buffer(fd, buf + received, chunk_size);
+ if (ret <= 0)
+ break;
+ received += ret;
+ if (received + chunk_size >= size) {
+ size *= 2;
+ ret = -E_INPUT_TOO_LARGE;
+ if (size > max_size)
+ break;
+ buf = para_realloc(buf, size);
+ }
+ }
+ obj->data = buf;
+ obj->size = received;
+ if (ret < 0)
+ free(buf);
+ return ret;
}
/**
- * get the name of the given audio format
- * \param i the audio format number
+ * Read data from a file descriptor, and send it to the afs process.
+ *
+ * \param fd File descriptor to read data from.
+ * \param arg_obj Pointer to the arguments to \a f.
+ * \param f The callback function.
+ * \param max_len Don't read more than that many bytes from stdin.
+ * \param result The result of the query is stored here.
*
- * This returns a pointer to statically allocated memory so it
- * must not be freed by the caller.
+ * This function is used by commands that wish to let para_server store
+ * arbitrary data specified by the user (for instance the add_blob family of
+ * commands). First, at most \a max_len bytes are read from \a fd, the result
+ * is concatenated with the buffer given by \a arg_obj, and the combined buffer
+ * is made available to the parent process via shared memory.
+ *
+ * \return Negative on errors, the return value of the underlying call to
+ * send_callback_request() otherwise.
*/
-const char *audio_format_name(int i)
+int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
+ unsigned max_len, struct osl_object *result)
{
- return i >= 0? afl[i].name : "(none)";
+ struct osl_object query, stdin_obj;
+ int ret;
+
+ ret = send_buffer(fd, AWAITING_DATA_MSG);
+ if (ret < 0)
+ return ret;
+ ret = fd2buf(fd, max_len, &stdin_obj);
+ if (ret < 0)
+ return ret;
+ query.size = arg_obj->size + stdin_obj.size;
+ query.data = para_malloc(query.size);
+ memcpy(query.data, arg_obj->data, arg_obj->size);
+ memcpy((char *)query.data + arg_obj->size, stdin_obj.data, stdin_obj.size);
+ free(stdin_obj.data);
+ ret = send_callback_request(f, &query, result);
+ free(query.data);
+ return ret;
}
/**
- * initialize the audio file sender
+ * Open the audio file with highest score.
+ *
+ * \param afd Audio file data is returned here.
*
- * Call the init functions of all supported audio format handlers and
- * initialize all supported senders.
+ * This stores all information for streaming the "best" audio file
+ * in the \a afd structure.
+ *
+ * \return Positive on success, negative on errors.
+ *
+ * \sa close_audio_file(), open_and_update_audio_file().
*/
-void afs_init(void)
+int open_next_audio_file(struct audio_file_data *afd)
{
- int i;
- char *hn = para_hostname(), *home = para_homedir();
-
- PARA_DEBUG_LOG("supported audio formats: %s\n",
- SUPPORTED_AUDIO_FORMATS);
- for (i = 0; afl[i].name; i++) {
- PARA_NOTICE_LOG("initializing %s handler\n",
- afl[i].name);
- afl[i].init(&afl[i]);
- }
- ms2tv(conf.announce_time_arg, &announce_tv);
- PARA_INFO_LOG("announce timeval: %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]);
+ struct osl_row *aft_row;
+ int ret;
+ for (;;) {
+ ret = score_get_best(&aft_row, &afd->score);
+ if (ret < 0)
+ return ret;
+ ret = open_and_update_audio_file(aft_row, afd);
+ if (ret >= 0)
+ return ret;
}
- free(hn);
- free(home);
}
-static int get_file_info(int i)
+/**
+ * Free all resources which were allocated by open_next_audio_file().
+ *
+ * \param afd The structure previously filled in by open_next_audio_file().
+ *
+ * \return The return value of the underlying call to para_munmap().
+ *
+ * \sa open_next_audio_file().
+ */
+int close_audio_file(struct audio_file_data *afd)
{
- return afl[i].get_file_info(audio_file, mmd->audio_file_info,
- &mmd->chunks_total, &mmd->seconds_total);
+ free(afd->afhi.chunk_table);
+ return para_munmap(afd->map.data, afd->map.size);
}
-/*
- * guess the audio format judging from filename
- * \param name the filename
- *
- * \return This function returns -1 if it has no idea what kind of audio
- * file this might be. Otherwise the (non-negative) number of the audio format
- * is returned.
- */
-static int guess_audio_format(const char *name)
+#if 0
+static void play_loop(enum play_mode current_play_mode)
{
+ int i, ret;
+ struct audio_file_data afd;
+
+ afd.current_play_mode = current_play_mode;
+ for (i = 0; i < 0; i++) {
+ ret = open_next_audio_file(&afd);
+ if (ret < 0) {
+ PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
+ return;
+ }
+ PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
+ sleep(1);
+ close_audio_file(&afd);
+ }
+}
+#endif
- int i, len1 = strlen(name), len2;
- for (i = 0; afl[i].name; i++) {
- len2 = strlen(afl[i].name);
- if (len1 < len2)
- continue;
- if (!strncasecmp(name + (len1 - len2), afl[i].name, len2)) {
- PARA_DEBUG_LOG("might be %s\n", afl[i].name);
- return i;
+static enum play_mode init_admissible_files(void)
+{
+ int ret;
+ char *given_mood, *given_playlist;
+
+ given_mood = "mood_that_was_given_at_the_command_line";
+ given_playlist = "given_playlist";
+
+ if (given_mood) {
+ ret = change_current_mood(given_mood);
+ if (ret >= 0) {
+ if (given_playlist)
+ PARA_WARNING_LOG("ignoring playlist %s\n",
+ given_playlist);
+ return PLAY_MODE_MOOD;
}
}
- return -1;
+ if (given_playlist) {
+ ret = playlist_open(given_playlist);
+ if (ret >= 0)
+ return PLAY_MODE_PLAYLIST;
+ }
+ ret = change_current_mood(NULL); /* open first available mood */
+ if (ret >= 0)
+ return PLAY_MODE_MOOD;
+ change_current_mood(""); /* open dummy mood, always successful */
+ return PLAY_MODE_MOOD;
}
-static int get_audio_format(int omit)
+static int setup_command_socket_or_die(void)
{
- int i;
-
- for (i = 0; afl[i].name; i++) {
- if (i == omit || !afl[i].get_file_info)
- continue;
- rewind(audio_file);
- if (get_file_info(i) > 0)
- return i;
- rewind(audio_file);
+ int ret;
+ char *socket_name = conf.afs_socket_arg;
+ struct sockaddr_un unix_addr;
+
+ unlink(socket_name);
+ ret = create_local_socket(socket_name, &unix_addr,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
+ if (ret < 0) {
+ PARA_EMERG_LOG("%s: %s\n", PARA_STRERROR(-ret), socket_name);
+ exit(EXIT_FAILURE);
+ }
+ 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)
+static int server_socket;
+static struct command_task command_task_struct;
+static struct signal_task signal_task_struct;
+
+static void unregister_tasks(void)
{
- int i;
- struct stat file_status;
-
- i = guess_audio_format(mmd->filename);
- if (i < 0 || get_file_info(i) < 0)
- i = get_audio_format(i);
- if (i < 0)
- return i;
- mmd->audio_format = i;
- mmd->chunks_sent = 0;
- mmd->current_chunk = 0;
- mmd->offset = 0;
- if (fstat(fileno(audio_file), &file_status) == -1)
- return -E_FSTAT;
- mmd->size = file_status.st_size;
- mmd->mtime = file_status.st_mtime;
- mmd->events++;
- PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename);
- return 1;
+ unregister_task(&command_task_struct.task);
+ unregister_task(&signal_task_struct.task);
}
-static void get_song(void)
+static void close_afs_tables(enum osl_close_flags flags)
{
- char **sl = dblist[mmd->selector_num].get_audio_file_list(10);
- int i;
-
- if (!sl)
- goto err_out;
- for (i = 0; sl[i]; i++) {
- struct timeval now;
- PARA_INFO_LOG("trying %s\n", sl[i]);
- if (strlen(sl[i]) >= _POSIX_PATH_MAX)
- continue;
- audio_file = fopen(sl[i], "r");
- if (!audio_file)
- continue;
- strcpy(mmd->filename, sl[i]);
- if (update_mmd() < 0) {
- fclose(audio_file);
- audio_file = NULL;
- continue;
- }
- mmd->num_played++;
- if (dblist[mmd->selector_num].update_audio_file)
- dblist[mmd->selector_num].update_audio_file(sl[i]);
- PARA_DEBUG_LOG("%s", "success\n");
- mmd->new_afs_status_flags &= (~AFS_NEXT);
- gettimeofday(&now, NULL);
- tv_add(&now, &announce_tv, &data_send_barrier);
-
- goto free;
- }
- PARA_ERROR_LOG("%s", "no valid files found\n");
-err_out:
- mmd->new_afs_status_flags = AFS_NEXT;
-free:
- if (sl) {
- for (i = 0; sl[i]; i++)
- free(sl[i]);
- free(sl);
- }
+ PARA_NOTICE_LOG("closing afs_tables\n");
+ score_shutdown(flags);
+ attribute_shutdown(flags);
+ close_current_mood();
+ playlist_close();
+ moods_shutdown(flags);
+ playlists_shutdown(flags);
+ lyrics_shutdown(flags);
+ images_shutdown(flags);
+ aft_shutdown(flags);
}
-static int chk_barrier(const char *bname, const struct timeval *now,
- const struct timeval *barrier, struct timeval *diff, int log)
+static void signal_pre_select(struct sched *s, struct task *t)
{
- long ms;
+ struct signal_task *st = t->private_data;
+ t->ret = 1;
+ para_fd_set(st->fd, &s->rfds, &s->max_fileno);
+}
- if (tv_diff(now, barrier, diff) > 0)
- return 1;
- ms = tv2ms(diff);
- if (log && ms)
- PARA_DEBUG_LOG("%s barrier: %lims left\n", bname, ms);
- return -1;
+static void signal_post_select(struct sched *s, struct task *t)
+{
+ struct signal_task *st = t->private_data;
+ t->ret = 1;
+ if (!FD_ISSET(st->fd, &s->rfds))
+ return;
+ st->signum = para_next_signal();
+ t->ret = 1;
+ if (st->signum == SIGUSR1)
+ return; /* ignore SIGUSR1 */
+ PARA_NOTICE_LOG("caught signal %d\n", st->signum);
+ t->ret = -E_SIGNAL_CAUGHT;
+ unregister_tasks();
}
-static void afs_next_chunk_time(struct timeval *due)
+static void register_signal_task(void)
{
- struct timeval tmp;
+ 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 struct list_head afs_client_list;
- tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp);
- tv_add(&tmp, &mmd->stream_start, due);
+struct afs_client {
+ struct list_head node;
+ int fd;
+ struct timeval connect_time;
+};
+
+static void command_pre_select(struct sched *s, struct task *t)
+{
+ struct command_task *ct = t->private_data;
+ struct afs_client *client;
+
+ para_fd_set(ct->fd, &s->rfds, &s->max_fileno);
+ list_for_each_entry(client, &afs_client_list, node)
+ para_fd_set(client->fd, &s->rfds, &s->max_fileno);
+ t->ret = 1;
}
/*
- * != NULL: timeout for next chunk
- * NULL: nothing to do
+ * On errors, negative value is written to fd.
+ * On success: If query produced a result, the result_shmid is written to fd.
+ * Otherwise, zero is written.
*/
-static struct timeval *afs_compute_timeout(void)
+static int call_callback(int fd, int query_shmid)
{
- static struct timeval the_timeout;
- struct timeval now, next_chunk;
-
- if (afs_next() && mmd->audio_format >= 0) {
- /* only sleep a bit, nec*/
- the_timeout.tv_sec = 0;
- the_timeout.tv_usec = 100;
- return &the_timeout;
+ void *query_shm, *result_shm;
+ struct callback_query *cq;
+ struct callback_result *cr;
+ struct osl_object query, result = {.data = NULL};
+ int result_shmid = -1, ret, ret2;
+
+ ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
+ if (ret < 0)
+ goto out;
+ cq = query_shm;
+ query.data = (char *)query_shm + sizeof(*cq);
+ query.size = cq->query_size;
+ ret = cq->handler(&query, &result);
+ ret2 = shm_detach(query_shm);
+ if (ret2 < 0 && ret >= 0)
+ ret = ret2;
+ if (ret < 0)
+ goto out;
+ ret = 0;
+ if (!result.data || !result.size)
+ goto out;
+ ret = shm_new(result.size + sizeof(struct callback_result));
+ if (ret < 0)
+ goto out;
+ result_shmid = ret;
+ ret = shm_attach(result_shmid, ATTACH_RW, &result_shm);
+ if (ret < 0)
+ goto out;
+ cr = result_shm;
+ cr->result_size = result.size;
+ memcpy(result_shm + sizeof(*cr), result.data, result.size);
+ ret = shm_detach(result_shm);
+ if (ret < 0)
+ goto out;
+ ret = result_shmid;
+out:
+ free(result.data);
+ ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
+ if (ret < 0 || ret2 < 0) {
+ if (result_shmid >= 0)
+ if (shm_destroy(result_shmid) < 0)
+ PARA_ERROR_LOG("destroy result failed\n");
+ if (ret >= 0)
+ ret = ret2;
}
- gettimeofday(&now, NULL);
- if (chk_barrier("eof", &now, &eof_barrier, &the_timeout, 1) < 0)
- return &the_timeout;
- if (chk_barrier("data send", &now, &data_send_barrier,
- &the_timeout, 1) < 0)
- return &the_timeout;
- if (mmd->audio_format < 0 || !afs_playing() || !audio_file)
- return NULL;
- afs_next_chunk_time(&next_chunk);
- if (chk_barrier(afl[mmd->audio_format].name, &now, &next_chunk,
- &the_timeout, 0) < 0)
- return &the_timeout;
- /* chunk is due or bof */
- the_timeout.tv_sec = 0;
- the_timeout.tv_usec = 0;
- return &the_timeout;
+ return ret;
}
-static void afs_eof(struct audio_format *af)
+static void execute_afs_command(int fd, uint32_t expected_cookie)
{
- struct timeval now;
- int i;
- char *tmp;
+ uint32_t cookie;
+ int query_shmid;
+ char buf[sizeof(cookie) + sizeof(query_shmid)];
+ int ret = recv_bin_buffer(fd, buf, sizeof(buf));
- if (!af || !audio_file) {
- for (i = 0; senders[i].name; i++)
- senders[i].shutdown_clients();
+ if (ret < 0) {
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret));
+ return;
+ }
+ if (ret != sizeof(buf)) {
+ PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
+ ret, (long unsigned) sizeof(buf));
return;
}
- 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++;
+ cookie = *(uint32_t *)buf;
+ if (cookie != expected_cookie) {
+ PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
+ (unsigned)cookie, (unsigned)expected_cookie);
+ return;
+ }
+ query_shmid = *(int *)(buf + sizeof(cookie));
+ if (query_shmid < 0) {
+ PARA_WARNING_LOG("received invalid query shmid %d)\n",
+ query_shmid);
+ return;
+ }
+ /* Ignore return value: Errors might be ok here. */
+ call_callback(fd, query_shmid);
}
-/**
- * compute the timeout for para_server's main select-loop
- *
- * This function gets called from para_server to determine the timeout value
- * for its main select loop.
- *
- * Before the timeout is computed, the current afs status flags are evaluated
- * and acted upon by calling appropriate functions from the lower layers.
- * Possible actions include
- *
- * - request a new file list from the current dabase tool (audio file change)
- * - shutdown of all senders (stop/pause command)
- * - repositioning of the stream (ff/jmp command)
- *
- * \return A pointer to a struct timeval containing the timeout for the next
- * chunk of data to be sent, or NULL if we're not sending right now.
- */
-struct timeval *afs_preselect(void)
+#define AFS_CLIENT_TIMEOUT 3
+
+static void command_post_select(struct sched *s, struct task *t)
{
- struct audio_format *af = NULL;
- int i, format;
- struct timeval *ret;
-again:
- format = mmd->audio_format;
- if (format >= 0)
- af = afl + format;
- else
- for (i = 0; senders[i].name; i++)
- senders[i].shutdown_clients();
- if (afs_next() && af) {
- afs_eof(af);
- return afs_compute_timeout();
- }
- if (afs_paused() || afs_repos()) {
- for (i = 0; senders[i].name; i++)
- senders[i].shutdown_clients();
- if (af) {
- struct timeval now;
- 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;
+ struct command_task *ct = t->private_data;
+ struct sockaddr_un unix_addr;
+ struct afs_client *client, *tmp;
+
+ /* First, check the list of connected clients. */
+ list_for_each_entry_safe(client, tmp, &afs_client_list, node) {
+ if (FD_ISSET(client->fd, &s->rfds))
+ execute_afs_command(client->fd, ct->cookie);
+ else { /* prevent bogus connection flodding */
+ struct timeval diff;
+ tv_diff(now, &client->connect_time, &diff);
+ if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
+ continue;
+ PARA_WARNING_LOG("connection timeout\n");
}
- mmd->chunks_sent = 0;
+ close(client->fd);
+ list_del(&client->node);
+ free(client);
}
- if (af && afs_repos() && mmd->current_chunk != mmd->repos_request)
- af->reposition_stream(mmd->repos_request);
- if (afs_repos()) {
- mmd->new_afs_status_flags &= ~(AFS_REPOS);
- mmd->current_chunk = mmd->repos_request;
+ /* Next, accept connections on the local socket. */
+ if (!FD_ISSET(ct->fd, &s->rfds))
+ goto out;
+ t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
+ if (t->ret < 0) {
+ PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+ goto out;
}
- ret = afs_compute_timeout();
- if (!ret && !audio_file && afs_playing() &&
- !(mmd->new_afs_status_flags & AFS_NOMORE)) {
- PARA_DEBUG_LOG("%s", "ready and playing, but no audio file\n");
- get_song();
- goto again;
+ client = para_malloc(sizeof(*client));
+ client->fd = t->ret;
+ client->connect_time = *now;
+ para_list_add(&client->node, &afs_client_list);
+out:
+ t->ret = 1;
+}
+
+static void register_command_task(uint32_t cookie)
+{
+ struct command_task *ct = &command_task_struct;
+ ct->fd = setup_command_socket_or_die();
+ ct->cookie = cookie;
+
+ ct->task.pre_select = command_pre_select;
+ ct->task.post_select = command_post_select;
+ ct->task.private_data = ct;
+ sprintf(ct->task.status, "command task");
+ register_task(&ct->task);
+}
+
+void register_tasks(uint32_t cookie)
+{
+ register_signal_task();
+ register_command_task(cookie);
+}
+
+static char *database_dir;
+
+static int make_database_dir(void)
+{
+ int ret;
+
+ if (!database_dir) {
+ if (conf.afs_database_dir_given)
+ database_dir = para_strdup(conf.afs_database_dir_arg);
+ else {
+ char *home = para_homedir();
+ database_dir = make_message(
+ "%s/.paraslash/afs_database", home);
+ free(home);
+ }
}
+ PARA_INFO_LOG("afs_database dir %s\n", database_dir);
+ ret = para_mkdir(database_dir, 0777);
+ if (ret >= 0 || ret == -E_EXIST)
+ return 1;
+ free(database_dir);
+ database_dir = NULL;
return ret;
}
-/**
- * afs_send_chunk - paraslash's main sending function
- *
- * This function gets called from para_server as soon as the next chunk of
- * data should be pushed out. It first calls the read_chunk() function of
- * the current audio format handler to obtain a pointer to the data to be
- * sent out as well as its length. This information is then passed to each
- * supported sender's send() function which does the actual sending.
- *
- * Return value: Positive return value on success, zero on eof and negative
- * on errors.
- */
+static int open_afs_tables(void)
+{
+ int ret = make_database_dir();
+
+ if (ret < 0)
+ return ret;
+ ret = attribute_init(&afs_tables[TBLNUM_ATTRIBUTES], database_dir);
+ if (ret < 0)
+ return ret;
+ ret = moods_init(&afs_tables[TBLNUM_MOODS], database_dir);
+ if (ret < 0)
+ goto moods_init_error;
+ ret = playlists_init(&afs_tables[TBLNUM_PLAYLIST], database_dir);
+ if (ret < 0)
+ goto playlists_init_error;
+ ret = lyrics_init(&afs_tables[TBLNUM_LYRICS], database_dir);
+ if (ret < 0)
+ goto lyrics_init_error;
+ ret = images_init(&afs_tables[TBLNUM_IMAGES], database_dir);
+ if (ret < 0)
+ goto images_init_error;
+ ret = score_init(&afs_tables[TBLNUM_SCORES], database_dir);
+ if (ret < 0)
+ goto score_init_error;
+ ret = aft_init(&afs_tables[TBLNUM_AUDIO_FILES], database_dir);
+ if (ret < 0)
+ goto aft_init_error;
+ return 1;
+
+aft_init_error:
+ score_shutdown(OSL_MARK_CLEAN);
+score_init_error:
+ images_shutdown(OSL_MARK_CLEAN);
+images_init_error:
+ lyrics_shutdown(OSL_MARK_CLEAN);
+lyrics_init_error:
+ playlists_shutdown(OSL_MARK_CLEAN);
+playlists_init_error:
+ moods_shutdown(OSL_MARK_CLEAN);
+moods_init_error:
+ attribute_shutdown(OSL_MARK_CLEAN);
+ return ret;
+}
-void afs_send_chunk(void)
+__noreturn int afs_init(uint32_t cookie, int socket_fd)
{
- int i;
- struct audio_format *af;
- char *buf;
- ssize_t ret;
- struct timeval now, due;
+ enum play_mode current_play_mode;
+ struct sched s;
+ int ret;
- if (mmd->audio_format < 0 || !audio_file || !afs_playing())
- return;
- af = &afl[mmd->audio_format];
- gettimeofday(&now, NULL);
- afs_next_chunk_time(&due);
- if (tv_diff(&due, &now, NULL) > 0)
- return;
- buf = af->read_chunk(mmd->current_chunk, &ret);
- mmd->new_afs_status_flags &= ~AFS_REPOS;
- if (!buf) {
+ INIT_LIST_HEAD(&afs_client_list);
+ ret = open_afs_tables();
+
+ if (ret < 0) {
+ PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ exit(EXIT_FAILURE);
+ }
+ server_socket = socket_fd;
+ ret = mark_fd_nonblock(server_socket);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
+ PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
+ server_socket, (unsigned) cookie);
+ current_play_mode = init_admissible_files();
+ register_tasks(cookie);
+ s.default_timeout.tv_sec = 0;
+ s.default_timeout.tv_usec = 99 * 1000;
+ ret = sched(&s);
+ if (ret < 0)
+ PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
+ close_afs_tables(OSL_MARK_CLEAN);
+ exit(EXIT_FAILURE);
+}
+
+static int create_tables_callback(const struct osl_object *query,
+ __a_unused struct osl_object *result)
+{
+ uint32_t table_mask = *(uint32_t *)query->data;
+ int i, ret;
+
+ close_afs_tables(OSL_MARK_CLEAN);
+ for (i = 0; i < NUM_AFS_TABLES; i++) {
+ struct table_info *ti = afs_tables + i;
+
+ if (ti->flags & TBLFLAG_SKIP_CREATE)
+ continue;
+ if (!(table_mask & (1 << i)))
+ continue;
+ ret = osl_create_table(ti->desc);
if (ret < 0)
- mmd->new_afs_status_flags = AFS_NEXT;
- else
- mmd->new_afs_status_flags |= AFS_NEXT;
- afs_eof(af);
- return;
+ return ret;
+ }
+ ret = open_afs_tables();
+ return ret < 0? ret: 0;
+}
+
+int com_init(int fd, int argc, char * const * const argv)
+{
+ int i, j, ret;
+ uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
+ struct osl_object query = {.data = &table_mask,
+ .size = sizeof(table_mask)};
+
+ if (argc != 1) {
+ table_mask = 0;
+ for (i = 1; i < argc; i++) {
+ for (j = 0; j < NUM_AFS_TABLES; j++) {
+ struct table_info *ti = afs_tables + j;
+
+ if (ti->flags & TBLFLAG_SKIP_CREATE)
+ continue;
+ if (strcmp(argv[i], ti->desc->name))
+ continue;
+ table_mask |= (1 << j);
+ break;
+ }
+ if (j == NUM_AFS_TABLES)
+ return -E_BAD_TABLE_NAME;
+ }
}
- 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 = send_callback_request(create_tables_callback, &query, NULL);
+ if (ret < 0)
+ return ret;
+ return send_va_buffer(fd, "successfully created afs table(s)\n");
+}
+
+enum com_check_flags {
+ CHECK_AFT = 1,
+ CHECK_MOODS = 2,
+ CHECK_PLAYLISTS = 4
+};
+
+int com_check(int fd, int argc, char * const * const argv)
+{
+ unsigned flags = 0;
+ int i, ret;
+ struct osl_object result;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (arg[0] != '-')
+ break;
+ if (!strcmp(arg, "--")) {
+ i++;
+ break;
+ }
+ if (!strcmp(arg, "-a")) {
+ flags |= CHECK_AFT;
+ continue;
+ }
+ if (!strcmp(arg, "-p")) {
+ flags |= CHECK_PLAYLISTS;
+ continue;
+ }
+ if (!strcmp(arg, "-m")) {
+ flags |= CHECK_MOODS;
+ continue;
+ }
+ return -E_AFS_SYNTAX;
+ }
+ if (i < argc)
+ return -E_AFS_SYNTAX;
+ if (!flags)
+ flags = ~0U;
+ if (flags & CHECK_AFT) {
+ ret = send_callback_request(aft_check_callback, NULL, &result);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ ret = send_buffer(fd, (char *) result.data);
+ free(result.data);
+ if (ret < 0)
+ return ret;
+ }
}
- 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 (flags & CHECK_PLAYLISTS) {
+ ret = send_callback_request(playlist_check_callback, NULL, &result);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ ret = send_buffer(fd, (char *) result.data);
+ free(result.data);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ if (flags & CHECK_MOODS) {
+ ret = send_callback_request(mood_check_callback, NULL, &result);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ ret = send_buffer(fd, (char *) result.data);
+ free(result.data);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ return 1;
}
projects / paraslash.git / blobdiff