+/*
+ * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file afs.c Paraslash's audio file selector. */
+
+#include <signal.h>
+#include <fnmatch.h>
+#include "server.cmdline.h"
#include "para.h"
-#include "afh.h"
#include "error.h"
+#include "string.h"
+#include "afh.h"
+#include "afs.h"
+#include "server.h"
#include <dirent.h> /* readdir() */
#include <sys/mman.h>
#include <sys/time.h>
-//#include <inttypes.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"
-/** \file afs.c Paraslash's audio file selector. */
-
-/**
- * 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 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 */
+/** The osl tables used by afs. \sa blob.c. */
enum afs_table_num {
/** Contains audio file information. See aft.c. */
TBLNUM_AUDIO_FILES,
NUM_AFS_TABLES
};
-static struct table_info afs_tables[NUM_AFS_TABLES];
+static struct afs_table afs_tables[NUM_AFS_TABLES] = {
+ [TBLNUM_AUDIO_FILES] = {.init = aft_init},
+ [TBLNUM_ATTRIBUTES] = {.init = attribute_init},
+ [TBLNUM_SCORES] = {.init = score_init},
+ [TBLNUM_MOODS] = {.init = moods_init},
+ [TBLNUM_LYRICS] = {.init = lyrics_init},
+ [TBLNUM_IMAGES] = {.init = images_init},
+ [TBLNUM_PLAYLIST] = {.init = playlists_init},
+};
struct command_task {
/** The file descriptor for the local socket. */
struct task task;
};
+extern struct misc_meta_data *mmd;
+
+static int server_socket;
+static struct command_task command_task_struct;
+static struct signal_task signal_task_struct;
+
+static enum play_mode current_play_mode;
+static char *current_mop; /* mode or playlist specifier. NULL means dummy mooe */
+
/**
- * A wrapper for strtol(3).
- *
- * \param str The string to be converted to a long integer.
- * \param result The converted value is stored here.
+ * A random number used to "authenticate" the connection.
*
- * \return Positive on success, -E_ATOL on errors.
- *
- * \sa strtol(3), atoi(3).
+ * 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.
*/
-int para_atol(const char *str, long *result)
-{
- 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;
-}
+extern uint32_t afs_socket_cookie;
/**
- * Struct to let para_server call a function specified from child context.
+ * 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.
*
- * 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).
+ * 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.
*
- * \sa fork(2), ipc.c.
+ * The result and a \p callback_result structure is then written to another
+ * shared memory area. The identifier for that area is written to the handler's
+ * command socket, so that the handler process can read the id, attach the
+ * shared memory area and use the result.
+ *
+ * \sa struct callback_result.
*/
-struct callback_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;
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;
};
-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.
+ * Ask the afs 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.
+ * query to that area and notifies the afs process that \a f should be
+ * called ASAP.
*
- * \return Negative, if the shared memory area could not be set up. The return
- * value of the callback function otherwise.
+ * \return Negative, on errors, 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().
+ * \sa 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;
+ 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)];
+ size_t query_shm_size = sizeof(*cq);
- assert(query->data && query->size);
- ret = shm_new(query->size);
+ if (query)
+ query_shm_size += query->size;
+ ret = shm_new(query_shm_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);
+ query_shmid = ret;
+ ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
if (ret < 0)
goto out;
- memcpy(query_sma, query->data, query->size);
- ret = shm_detach(query_sma);
+ 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;
- /* 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;
- }
+
+ *(uint32_t *) buf = afs_socket_cookie;
+ *(int *) (buf + sizeof(afs_socket_cookie)) = query_shmid;
+
+ ret = create_remote_socket(conf.afs_socket_arg);
+ if (ret < 0)
+ goto out;
+ fd = ret;
+ 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_AFS_SHORT_READ;
+ goto out;
}
- ret = shm_callback_data->callback_ret;
-unlock_child_mutex:
- /* give other children a chance */
- mutex_unlock(child_mutex);
+ 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(cbd.query_shmid) < 0)
+ if (shm_destroy(query_shmid) < 0)
PARA_ERROR_LOG("%s\n", "shm destroy error");
- PARA_DEBUG_LOG("callback_ret: %d\n", ret);
+ if (fd >= 0)
+ close(fd);
+// PARA_DEBUG_LOG("callback_ret: %d\n", ret);
return ret;
}
* \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,
+ int argc, char * const * const argv, callback_function *f,
struct osl_object *result)
{
char *p;
* \return The return value of the underlying call to
* send_option_arg_callback_request().
*/
-int send_standard_callback_request(int argc, const char **argv,
+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;
+}
+
+/**
+ * Execute the given function for each matching row.
+ *
+ * \param pmd Describes what to match and how.
+ *
+ * \return The return value of the underlying call to osl_rbtree_loop()
+ * or osl_rbtree_loop_reverse().
+ */
+int for_each_matching_row(struct pattern_match_data *pmd)
+{
+ if (pmd->pm_flags & PM_REVERSE_LOOP)
+ return osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches);
+ return osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches);
+}
+
+/**
+ * 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 It returns an integer less than, equal to, or greater than zero if
+ * \a obj1 is found, respectively, to be less than, to match, or be greater than
+ * obj2.
+ *
+ * \sa strcmp(3), strncmp(3), osl_compare_func.
+ */
+int string_compare(const struct osl_object *obj1, const struct osl_object *obj2)
+{
+ const char *str1 = (const char *)obj1->data;
+ const char *str2 = (const char *)obj2->data;
+ return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
+}
+
/*
- * write input from fd to dynamically allocated char array,
- * but maximal max_size byte. Return size.
+ * write input from fd to dynamically allocated buffer,
+ * but maximal max_size byte.
*/
-static int fd2buf(int fd, char **buf, int max_size)
+static int fd2buf(int fd, unsigned max_size, struct osl_object *obj)
{
const size_t chunk_size = 1024;
- size_t size = 2048;
- char *p;
+ size_t size = 2048, received = 0;
int ret;
+ char *buf = para_malloc(size);
- *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;
-
+ for (;;) {
+ ret = recv_bin_buffer(fd, buf + received, chunk_size);
+ if (ret <= 0)
+ break;
+ received += ret;
+ if (received + chunk_size >= size) {
size *= 2;
- if (size > max_size) {
- ret = -E_INPUT_TOO_LARGE;
- goto out;
- }
- tmp = para_realloc(*buf, size);
- p = (p - *buf) + tmp;
- *buf = tmp;
+ ret = -E_INPUT_TOO_LARGE;
+ if (size > max_size)
+ break;
+ buf = para_realloc(buf, size);
}
}
- if (ret < 0) {
- ret = -E_READ;
- goto out;
- }
- ret = p - *buf;
-out:
- if (ret < 0 && *buf)
- free(*buf);
+ obj->data = buf;
+ obj->size = received;
+ if (ret < 0)
+ free(buf);
return ret;
}
/**
- * Read from stdin, and send the result to the parent process.
+ * 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.
*
* 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
+ * 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.
*/
-int stdin_command(struct osl_object *arg_obj, callback_function *f,
+int stdin_command(int fd, 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);
+ 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;
- stdin_len = ret;
- query.size = arg_obj->size + stdin_len;
+ 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_buf, stdin_len);
- free(stdin_buf);
+ 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;
}
+static int pass_afd(int fd, char *buf, size_t size)
+{
+ struct msghdr msg = {.msg_iov = NULL};
+ struct cmsghdr *cmsg;
+ char control[255];
+ int ret;
+ struct iovec iov;
+
+ iov.iov_base = buf;
+ iov.iov_len = size;
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ msg.msg_control = control;
+ msg.msg_controllen = sizeof(control);
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ *(int *)CMSG_DATA(cmsg) = fd;
+
+ /* Sum of the length of all control messages in the buffer */
+ msg.msg_controllen = cmsg->cmsg_len;
+ PARA_DEBUG_LOG("passing %zu bytes and fd %d\n", size, fd);
+ ret = sendmsg(server_socket, &msg, 0);
+ if (ret < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ return ret;
+ }
+ return 1;
+}
+
/**
* 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 a shared
+ * memory area. The id of that area and an open file descriptor for the next
+ * audio file are passed to the server process.
*
- * This stores all information for streaming the "best" audio file
- * in the \a afd structure.
+ * \return Standard.
*
- * \return Positive on success, negative on errors.
- *
- * \sa close_audio_file(), open_and_update_audio_file().
+ * \sa open_and_update_audio_file().
*/
-int open_next_audio_file(struct audio_file_data *afd)
+int open_next_audio_file(void)
{
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;
+ struct audio_file_data afd;
+ int ret, shmid;
+ char buf[8];
+ long score;
+again:
+ PARA_NOTICE_LOG("getting next audio file\n");
+ ret = score_get_best(&aft_row, &score);
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ goto no_admissible_files;
+ }
+ ret = open_and_update_audio_file(aft_row, score, &afd);
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ ret = score_delete(aft_row);
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ goto no_admissible_files;
+ }
+ goto again;
+ }
+ shmid = ret;
+ if (!write_ok(server_socket)) {
+ ret = -E_AFS_SOCKET;
+ goto destroy;
}
+ *(uint32_t *)buf = NEXT_AUDIO_FILE;
+ *(uint32_t *)(buf + 4) = (uint32_t)shmid;
+ ret = pass_afd(afd.fd, buf, 8);
+ close(afd.fd);
+ if (ret >= 0)
+ return ret;
+destroy:
+ shm_destroy(shmid);
+ return ret;
+no_admissible_files:
+ *(uint32_t *)buf = NO_ADMISSIBLE_FILES;
+ *(uint32_t *)(buf + 4) = (uint32_t)0;
+ return send_bin_buffer(server_socket, buf, 8);
}
-/**
- * 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)
+/* Never fails if arg == NULL */
+static int activate_mood_or_playlist(char *arg, int *num_admissible)
{
- free(afd->afhi.chunk_table);
- return para_munmap(afd->map.data, afd->map.size);
+ enum play_mode mode;
+ int ret;
+
+ if (!arg) {
+ ret = change_current_mood(NULL); /* always successful */
+ mode = PLAY_MODE_MOOD;
+ } else {
+ if (!strncmp(arg, "p/", 2)) {
+ ret = playlist_open(arg + 2);
+ mode = PLAY_MODE_PLAYLIST;
+ } else if (!strncmp(arg, "m/", 2)) {
+ ret = change_current_mood(arg + 2);
+ mode = PLAY_MODE_MOOD;
+ } else
+ return -E_AFS_SYNTAX;
+ if (ret < 0)
+ return ret;
+ }
+ if (num_admissible)
+ *num_admissible = ret;
+ current_play_mode = mode;
+ if (arg != current_mop) {
+ free(current_mop);
+ if (arg) {
+ current_mop = para_strdup(arg);
+ mmd_lock();
+ strncpy(mmd->afs_mode_string, arg,
+ sizeof(mmd->afs_mode_string));
+ mmd->afs_mode_string[sizeof(mmd->afs_mode_string) - 1] = '\0';
+ mmd_unlock();
+ } else {
+ mmd_lock();
+ strcpy(mmd->afs_mode_string, "dummy");
+ mmd_unlock();
+ current_mop = NULL;
+ }
+ }
+ return 1;
}
-#if 0
-static void play_loop(enum play_mode current_play_mode)
+static int com_select_callback(const struct osl_object *query,
+ struct osl_object *result)
{
- int i, ret;
- struct audio_file_data afd;
+ struct para_buffer pb = {.buf = NULL};
+ char *arg = query->data;
+ int num_admissible, ret;
- afd.current_play_mode = current_play_mode;
- for (i = 0; i < 0; i++) {
- ret = open_next_audio_file(&afd);
+ ret = clear_score_table();
+ if (ret < 0)
+ return ret;
+ if (current_play_mode == PLAY_MODE_MOOD)
+ close_current_mood();
+ else
+ playlist_close();
+ ret = activate_mood_or_playlist(arg, &num_admissible);
+ if (ret < 0) {
+ para_printf(&pb, "%s\n", para_strerror(-ret));
+ para_printf(&pb, "switching back to %s\n", current_mop?
+ current_mop : "dummy");
+ ret = activate_mood_or_playlist(current_mop, &num_admissible);
if (ret < 0) {
- PARA_ERROR_LOG("failed to open next audio file: %d\n", ret);
- return;
+ para_printf(&pb, "failed, switching to dummy\n");
+ activate_mood_or_playlist(NULL, &num_admissible);
}
- PARA_NOTICE_LOG("next audio file: %s, score: %li\n", afd.path, afd.score);
- sleep(1);
- close_audio_file(&afd);
}
+ para_printf(&pb, "activated %s (%d admissible files)\n", current_mop?
+ current_mop : "dummy mood", num_admissible);
+ result->data = pb.buf;
+ result->size = pb.size;
+ return 1;
}
-#endif
-
-static enum play_mode init_admissible_files(void)
+int com_select(int fd, int argc, char * const * const argv)
{
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;
+ struct osl_object query, result;
+
+ if (argc != 2)
+ return -E_AFS_SYNTAX;
+ query.data = argv[1];
+ query.size = strlen(argv[1]) + 1;
+ ret = send_callback_request(com_select_callback, &query,
+ &result);
+ if (ret > 0 && result.data && result.size) {
+ ret = send_va_buffer(fd, "%s", (char *)result.data);
+ free(result.data);
}
- 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;
+ return ret;
+}
+
+static void init_admissible_files(char *arg)
+{
+ if (activate_mood_or_playlist(arg, NULL) < 0)
+ activate_mood_or_playlist(NULL, NULL); /* always successful */
}
static int setup_command_socket_or_die(void)
{
- int ret;
- char *socket_name = "/tmp/afs_command_socket";
+ int ret, socket_fd;
+ 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)
+ 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");
+ }
+ socket_fd = ret;
+ if (listen(socket_fd , 5) < 0) {
+ PARA_EMERG_LOG("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;
+ ret = mark_fd_nonblocking(socket_fd);
+ if (ret < 0) {
+ close(socket_fd);
+ return ret;
+ }
+ PARA_INFO_LOG("listening on socket %s (fd %d)\n", socket_name, ret);
+ return socket_fd;
}
-static int server_socket;
+static void close_afs_tables(void)
+{
+ int i;
+ PARA_NOTICE_LOG("closing afs_tables\n");
+ for (i = 0; i < NUM_AFS_TABLES; i++)
+ afs_tables[i].close();
+}
+
+static char *database_dir;
+
+static void get_database_dir(void)
+{
+ 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);
+}
-void loop(void)
+static int make_database_dir(void)
{
- for (;;)
- sleep(1);
+ int ret;
+
+ get_database_dir();
+ ret = para_mkdir(database_dir, 0777);
+ if (ret >= 0 || is_errno(-ret, EEXIST))
+ return 1;
+ return ret;
}
-static void afs_shutdown(enum osl_close_flags flags)
+static int open_afs_tables(void)
{
- 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);
+ int i, ret;
+
+ get_database_dir();
+ PARA_NOTICE_LOG("opening %u osl tables in %s\n", NUM_AFS_TABLES,
+ database_dir);
+ for (i = 0; i < NUM_AFS_TABLES; i++) {
+ ret = afs_tables[i].open(database_dir);
+ if (ret >= 0)
+ continue;
+ PARA_ERROR_LOG("%s init: %s\n", afs_tables[i].name,
+ para_strerror(-ret));
+ break;
+ }
+ if (ret >= 0)
+ return ret;
+ while (i)
+ afs_tables[--i].close();
+ return ret;
+}
+
+static void unregister_tasks(void)
+{
+ unregister_task(&command_task_struct.task);
+ unregister_task(&signal_task_struct.task);
}
static void signal_pre_select(struct sched *s, struct task *t)
static void signal_post_select(struct sched *s, struct task *t)
{
struct signal_task *st = t->private_data;
+ t->ret = -E_AFS_PARENT_DIED;
+ if (getppid() == 1)
+ goto err;
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;
+ if (st->signum == SIGHUP) {
+ close_afs_tables();
+ t->ret = open_afs_tables();
+ if (t->ret < 0)
+ goto err;
+ init_admissible_files(current_mop);
+ return;
+ }
+ t->ret = -E_AFS_SIGNAL;
+err:
+ PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
+ unregister_tasks();
}
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);
+ para_install_sighandler(SIGHUP);
st->task.pre_select = signal_pre_select;
st->task.post_select = signal_post_select;
register_task(&st->task);
}
+static struct list_head afs_client_list;
+
+/** Describes on connected afs client. */
+struct afs_client {
+ /** Position in the afs client list. */
+ struct list_head node;
+ /** The socket file descriptor for this client. */
+ int fd;
+ /** The time the client connected. */
+ struct timeval connect_time;
+};
+
static void command_pre_select(struct sched *s, struct task *t)
{
struct command_task *ct = t->private_data;
- t->ret = 1;
+ struct afs_client *client;
+
+ para_fd_set(server_socket, &s->rfds, &s->max_fileno);
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;
}
/*
struct osl_object query, result = {.data = NULL};
int result_shmid = -1, ret, ret2;
- ret = shm_attach(query_shmid, ATTACH_RO, &query_shm);
+ ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
if (ret < 0)
goto out;
cq = query_shm;
ret = result_shmid;
out:
free(result.data);
- ret2 = send_bin_buffer(fd, (char *)ret, sizeof(int));
+ ret2 = send_bin_buffer(fd, (char *)&ret, sizeof(int));
if (ret < 0 || ret2 < 0) {
if (result_shmid >= 0)
if (shm_destroy(result_shmid) < 0)
return ret;
}
-static void command_post_select(struct sched *s, struct task *t)
+static void execute_server_command(void)
{
- 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;
+ char buf[8];
+ int ret = recv_bin_buffer(server_socket, buf, sizeof(buf) - 1);
- t->ret = 1;
- if (!FD_ISSET(ct->fd, &s->rfds))
+ if (ret <= 0) {
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
return;
- t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
- if (t->ret < 0)
+ }
+ buf[ret] = '\0';
+ PARA_DEBUG_LOG("received: %s\n", buf);
+ if (!strcmp(buf, "new")) {
+ ret = open_next_audio_file();
+ if (ret < 0) {
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ unregister_tasks();
+ }
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;
+ PARA_ERROR_LOG("unknown command\n");
+
+}
+
+static void execute_afs_command(int fd, uint32_t expected_cookie)
+{
+ uint32_t cookie;
+ int query_shmid;
+ char buf[sizeof(cookie) + sizeof(query_shmid)];
+ int ret = recv_bin_buffer(fd, buf, sizeof(buf));
+
+ if (ret < 0) {
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+ return;
+ }
+ if (ret != sizeof(buf)) {
+ PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
+ ret, (long unsigned) sizeof(buf));
+ return;
}
cookie = *(uint32_t *)buf;
- if (cookie != ct->cookie) {
+ if (cookie != expected_cookie) {
PARA_NOTICE_LOG("received invalid cookie(got %u, expected %u)\n",
- (unsigned)cookie, (unsigned)ct->cookie);
- t->ret = 1;
- goto out;
+ (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);
- t->ret = 1;
+ return;
+ }
+ /* Ignore return value: Errors might be OK here. */
+ call_callback(fd, query_shmid);
+}
+
+/** Shutdown connection if query has not arrived until this many seconds. */
+#define AFS_CLIENT_TIMEOUT 3
+
+static void command_post_select(struct sched *s, struct task *t)
+{
+ struct command_task *ct = t->private_data;
+ struct sockaddr_un unix_addr;
+ struct afs_client *client, *tmp;
+ int fd;
+ if (FD_ISSET(server_socket, &s->rfds))
+ execute_server_command();
+
+ /* 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 flooding */
+ struct timeval diff;
+ tv_diff(now, &client->connect_time, &diff);
+ if (diff.tv_sec < AFS_CLIENT_TIMEOUT)
+ continue;
+ PARA_WARNING_LOG("connection timeout\n");
+ }
+ close(client->fd);
+ list_del(&client->node);
+ free(client);
+ }
+ /* 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;
}
- t->ret = call_callback(fd, query_shmid);
+ fd = t->ret;
+ t->ret = mark_fd_nonblocking(fd);
if (t->ret < 0) {
- PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
- t->ret = 1;
+ PARA_NOTICE_LOG("%s\n", para_strerror(-t->ret));
+ close(fd);
goto out;
}
+ client = para_malloc(sizeof(*client));
+ client->fd = fd;
+ client->connect_time = *now;
+ para_list_add(&client->node, &afs_client_list);
out:
- close(fd);
+ t->ret = 1;
}
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;
register_task(&ct->task);
}
-void register_tasks(uint32_t cookie)
+static void register_tasks(uint32_t cookie)
{
register_signal_task();
register_command_task(cookie);
}
-__noreturn int afs_init(uint32_t cookie, int socket_fd)
+/**
+ * Initialize the audio file selector process.
+ *
+ * \param cookie The value used for "authentication".
+ * \param socket_fd File descriptor used for communication with the server.
+ */
+__noreturn void afs_init(uint32_t cookie, int socket_fd)
{
- int ret;
-// void *shm_area;
- enum play_mode current_play_mode;
struct sched s;
+ int i, ret;
+
+ INIT_LIST_HEAD(&afs_client_list);
+ for (i = 0; i < NUM_AFS_TABLES; i++)
+ afs_tables[i].init(&afs_tables[i]);
+ 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_nonblocking(server_socket);
+ if (ret < 0)
+ exit(EXIT_FAILURE);
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();
+ init_admissible_files(conf.afs_initial_mode_arg);
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);
+ s.default_timeout.tv_usec = 999 * 1000;
+ ret = schedule(&s);
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:
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ close_afs_tables();
exit(EXIT_FAILURE);
}
-static int create_all_tables(void)
+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();
for (i = 0; i < NUM_AFS_TABLES; i++) {
- struct table_info *ti = afs_tables + i;
+ struct afs_table *t = &afs_tables[i];
- if (ti->flags & TBLFLAG_SKIP_CREATE)
+ if (!(table_mask & (1 << i)))
+ continue;
+ if (!t->create)
continue;
- ret = osl_create_table(ti->desc);
+ ret = t->create(database_dir);
if (ret < 0)
return ret;
}
- return 1;
+ ret = open_afs_tables();
+ return ret < 0? ret: 0;
}
-/* TODO load tables after init */
-int com_init(__a_unused int fd, int argc, const char **argv)
+int com_init(int fd, int argc, char * const * const 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;
+ uint32_t table_mask = (1 << (NUM_AFS_TABLES + 1)) - 1;
+ struct osl_object query = {.data = &table_mask,
+ .size = sizeof(table_mask)};
- 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;
+ ret = make_database_dir();
+ if (ret < 0)
+ return ret;
+ if (argc != 1) {
+ table_mask = 0;
+ for (i = 1; i < argc; i++) {
+ for (j = 0; j < NUM_AFS_TABLES; j++) {
+ struct afs_table *t = &afs_tables[j];
+
+ if (strcmp(argv[i], t->name))
+ continue;
+ table_mask |= (1 << j);
+ break;
+ }
+ if (j == NUM_AFS_TABLES)
+ return -E_BAD_TABLE_NAME;
}
- if (j == NUM_AFS_TABLES)
- return -E_BAD_TABLE_NAME;
}
- return 1;
+ 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");
}
-#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,
-}
+/**
+ * Flags for the check command.
+ *
+ * \sa com_check().
+ */
+enum com_check_flags {
+ /** Check the audio file table. */
+ CHECK_AFT = 1,
+ /** Check the mood table. */
+ CHECK_MOODS = 2,
+ /** Check the playlist table. */
+ CHECK_PLAYLISTS = 4
};
-static void call_callback(void)
+int com_check(int fd, int argc, char * const * const argv)
{
- struct osl_object query, result = {.data = NULL};
- int ret, ret2;
+ unsigned flags = 0;
+ int i, ret;
+ struct osl_object result;
- 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);
+ 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)
- 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);
+ return ret;
+ if (ret > 0) {
+ ret = send_buffer(fd, (char *) result.data);
+ free(result.data);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ if (flags & CHECK_PLAYLISTS) {
+ ret = send_callback_request(playlist_check_callback, NULL, &result);
if (ret < 0)
- 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;
+ return ret;
+ if (ret > 0) {
+ ret = send_buffer(fd, (char *) result.data);
+ free(result.data);
+ if (ret < 0)
+ return ret;
}
}
- 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;
+ 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;
+ }
}
-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 */
+ return 1;
}
-static int got_sigchld;
-static void server_loop(int child_pid)
+void afs_event(enum afs_events event, struct para_buffer *pb,
+ void *data)
{
-// 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)
+ int i, ret;
+
+ for (i = 0; i < NUM_AFS_TABLES; i++) {
+ struct afs_table *t = &afs_tables[i];
+ if (!t->event_handler)
continue;
- mutex_destroy(result_mutex);
- mutex_destroy(callback_mutex);
- mutex_destroy(child_mutex);
- afs_shutdown(OSL_MARK_CLEAN);
- exit(EXIT_SUCCESS);
+ ret = t->event_handler(event, pb, data);
+ if (ret < 0)
+ PARA_CRIT_LOG("%s\n", para_strerror(-ret));
}
}
-int main(int argc, const char **argv)
+int images_event_handler(__a_unused enum afs_events event,
+ __a_unused struct para_buffer *pb, __a_unused void *data)
{
- 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;
+ return 1;
+}
- }
- 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;
+int lyrics_event_handler(__a_unused enum afs_events event,
+ __a_unused struct para_buffer *pb, __a_unused void *data)
+{
+ return 1;
}
-#endif
projects / paraslash.git / blobdiff