/*
- * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2009 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 <openssl/rc4.h>
+#include <osl.h>
+
#include "server.cmdline.h"
#include "para.h"
+#include "error.h"
+#include "crypt.h"
+#include "string.h"
#include "afh.h"
+#include "afs.h"
#include "server.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"
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 int mmd_mutex;
+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 random number used to "authenticate" the connection.
*
size_t result_size;
};
+static int dispatch_result(int result_shmid, callback_result_handler *handler,
+ void *private_result_data)
+{
+ struct osl_object result;
+ void *result_shm;
+ int ret2, ret = shm_attach(result_shmid, ATTACH_RO, &result_shm);
+ struct callback_result *cr = result_shm;
+
+ if (ret < 0) {
+ PARA_ERROR_LOG("attach failed: %s\n", para_strerror(-ret));
+ return ret;
+ }
+ result.size = cr->result_size;
+ result.data = result_shm + sizeof(*cr);
+ if (result.size) {
+ assert(handler);
+ ret = handler(&result, private_result_data);
+ if (ret < 0)
+ PARA_NOTICE_LOG("result handler error: %s\n",
+ para_strerror(-ret));
+ }
+ ret2 = shm_detach(result_shm);
+ if (ret2 < 0) {
+ PARA_ERROR_LOG("detach failed: %s\n", para_strerror(-ret2));
+ if (ret >= 0)
+ ret = ret2;
+ }
+ return ret;
+}
+
/**
- * 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.
+ * \param result_handler Called for each shm area sent by the callback.
+ * \param private_result_data Passed verbatim to \a result_handler.
*
- * 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.
+ * This function creates a socket for communication with the afs process and a
+ * shared memory area (sma) to which the buffer pointed to by \a query is
+ * copied. It then notifies the afs process that the callback function \a f
+ * should be executed by sending the shared memory identifier (shmid) to the
+ * socket.
+
+ * If the callback produces a result, it sends any number of shared memory
+ * identifiers back via the socket. For each such identifier received, \a
+ * result_handler is called. The contents of the sma identified by the received
+ * shmid are passed to that function as an osl object. The private_result_data
+ * pointer is passed as the second argument to \a result_handler.
*
- * \return Negative, on errors, the return value of the callback function
- * otherwise.
+ * \return Standard.
*
* \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)
+ callback_result_handler *result_handler,
+ void *private_result_data)
{
struct callback_query *cq;
- struct callback_result *cr;
int ret, fd = -1, query_shmid, result_shmid;
- void *query_shm, *result_shm;
+ void *query_shm;
char buf[sizeof(afs_socket_cookie) + sizeof(int)];
-// char *tmpsocket_name;
- struct sockaddr_un unix_addr;
+ size_t query_shm_size = sizeof(*cq);
+ int dispatch_error = 0;
- assert(query->data && query->size);
- ret = shm_new(query->size + sizeof(*cq));
+ if (query)
+ query_shm_size += query->size;
+ ret = shm_new(query_shm_size);
if (ret < 0)
return ret;
query_shmid = ret;
goto out;
cq = query_shm;
cq->handler = f;
- cq->query_size = query->size;
+ cq->query_size = query_shm_size - sizeof(*cq);
- memcpy(query_shm + sizeof(*cq), query->data, query->size);
+ 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);
+ ret = create_remote_socket(conf.afs_socket_arg);
if (ret < 0)
goto out;
fd = ret;
- ret = init_unix_addr(&unix_addr, conf.afs_socket_arg);
- if (ret < 0)
- goto out;
- ret = -E_CONNECT;
- if (connect(fd, (struct sockaddr *)&unix_addr, sizeof(unix_addr)) < 0) /* FIXME: Use para_connect() */
- goto out;
ret = send_bin_buffer(fd, buf, sizeof(buf));
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);
+ /*
+ * Read all shmids from afs.
+ *
+ * Even if the dispatcher returns an error we _must_ continue to read
+ * shmids from fd so that we can destroy all shared memory areas that
+ * have been created for us by the afs process.
+ */
+ for (;;) {
+ ret = recv_bin_buffer(fd, buf, sizeof(int));
+ if (ret <= 0)
+ goto out;
+ assert(ret == sizeof(int));
+ ret = *(int *) buf;
+ assert(ret > 0);
+ result_shmid = ret;
+ if (!dispatch_error) {
+ ret = dispatch_result(result_shmid, result_handler,
+ private_result_data);
+ if (ret < 0)
+ dispatch_error = 1;
+ }
+ ret = shm_destroy(result_shmid);
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;
+ PARA_CRIT_LOG("destroy result failed: %s\n",
+ para_strerror(-ret));
+ }
out:
if (shm_destroy(query_shmid) < 0)
- PARA_ERROR_LOG("%s\n", "shm destroy error");
+ PARA_CRIT_LOG("shm destroy error\n");
if (fd >= 0)
close(fd);
// PARA_DEBUG_LOG("callback_ret: %d\n", ret);
* \param argc Argument count.
* \param argv Standard argument vector.
* \param f The callback function.
- * \param result The result of the query is stored here.
+ * \param result_handler See \ref send_callback_request.
+ * \param private_result_data See \ref send_callback_request.
*
* 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
*/
int send_option_arg_callback_request(struct osl_object *options,
int argc, char * const * const argv, callback_function *f,
- struct osl_object *result)
+ callback_result_handler *result_handler,
+ void *private_result_data)
{
char *p;
int i, ret;
strcpy(p, argv[i]); /* OK */
p += strlen(argv[i]) + 1;
}
- ret = send_callback_request(f, &query, result);
+ ret = send_callback_request(f, &query, result_handler,
+ private_result_data);
free(query.data);
return ret;
}
* \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().
+ * \param result_handler See \ref send_callback_request.
+ * \param private_result_data See \ref send_callback_request.
*
* This is similar to send_option_arg_callback_request(), but no options buffer
* is passed to the parent process.
* send_option_arg_callback_request().
*/
int send_standard_callback_request(int argc, char * const * const argv,
- callback_function *f, struct osl_object *result)
+ callback_function *f, callback_result_handler *result_handler,
+ void *private_result_data)
{
- return send_option_arg_callback_request(NULL, argc, argv, f, result);
+ return send_option_arg_callback_request(NULL, argc, argv, f, result_handler,
+ private_result_data);
+}
+
+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(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 Standard.
+ */
+int for_each_matching_row(struct pattern_match_data *pmd)
+{
+ if (pmd->pm_flags & PM_REVERSE_LOOP)
+ return osl(osl_rbtree_loop_reverse(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches));
+ return osl(osl_rbtree_loop(pmd->table, pmd->loop_col_num, pmd,
+ action_if_pattern_matches));
}
/**
return strncmp(str1, str2, PARA_MIN(obj1->size, obj2->size));
}
-/**
- * A wrapper for strtol(3).
- *
- * \param str The string to be converted to a long integer.
- * \param result The converted value is stored here.
- *
- * \return Positive on success, -E_ATOL on errors.
- *
- * \sa strtol(3), atoi(3).
- */
-int para_atol(const char *str, long *result)
-{
- char *endptr;
- long val;
- int ret, base = 10;
-
- 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;
-}
-
-
-/*
- * 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)
+static int pass_afd(int fd, char *buf, size_t size)
{
- const size_t chunk_size = 1024;
- size_t size = 2048;
- char *p;
+ struct msghdr msg = {.msg_iov = NULL};
+ struct cmsghdr *cmsg;
+ char control[255];
int ret;
+ struct iovec iov;
- *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;
- }
- }
+ 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 = -E_READ;
- goto out;
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ return ret;
}
- ret = p - *buf;
-out:
- if (ret < 0 && *buf)
- free(*buf);
- return ret;
+ return 1;
}
/**
- * Read from stdin, and send the result to the parent process.
+ * Open the audio file with highest score.
*
- * \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 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 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 Standard.
*
- * \return Negative on errors, the return value of the underlying call to
- * send_callback_request() otherwise.
+ * \sa open_and_update_audio_file().
*/
-int stdin_command(struct osl_object *arg_obj, callback_function *f,
- unsigned max_len, struct osl_object *result)
+static int open_next_audio_file(void)
{
- char *stdin_buf;
- size_t stdin_len;
- struct osl_object query;
- int ret = fd2buf(STDIN_FILENO, &stdin_buf, max_len);
-
- if (ret < 0)
+ struct osl_row *aft_row;
+ 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;
- 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);
+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);
}
-/**
- * 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)
+/* Never fails if arg == NULL */
+static int activate_mood_or_playlist(char *arg, int *num_admissible)
{
- struct osl_row *aft_row;
+ enum play_mode mode;
int ret;
- for (;;) {
- ret = score_get_best(&aft_row, &afd->score);
+
+ 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;
- ret = open_and_update_audio_file(aft_row, afd);
- 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);
+ mutex_lock(mmd_mutex);
+ strncpy(mmd->afs_mode_string, arg,
+ sizeof(mmd->afs_mode_string));
+ mmd->afs_mode_string[sizeof(mmd->afs_mode_string) - 1] = '\0';
+ mutex_unlock(mmd_mutex);
+ } else {
+ mutex_lock(mmd_mutex);
+ strcpy(mmd->afs_mode_string, "dummy");
+ mutex_unlock(mmd_mutex);
+ current_mop = NULL;
+ }
+ }
+ return 1;
+}
+
+static void com_select_callback(int fd, const struct osl_object *query)
+{
+ struct para_buffer pb = {
+ .max_size = SHMMAX,
+ .private_data = &fd,
+ .max_size_handler = pass_buffer_as_shm
+ };
+ char *arg = query->data;
+ int num_admissible, ret, ret2;
+
+ ret = clear_score_table();
+ if (ret < 0) {
+ ret2 = para_printf(&pb, "%s\n", para_strerror(-ret));
+ goto out;
+ }
+ if (current_play_mode == PLAY_MODE_MOOD)
+ close_current_mood();
+ else
+ playlist_close();
+ ret = activate_mood_or_playlist(arg, &num_admissible);
+ if (ret < 0) {
+ ret2 = para_printf(&pb, "%s\nswitching back to %s\n",
+ para_strerror(-ret), current_mop?
+ current_mop : "dummy");
+ ret = activate_mood_or_playlist(current_mop, &num_admissible);
+ if (ret < 0) {
+ if (ret2 >= 0)
+ ret2 = para_printf(&pb, "failed, switching to dummy\n");
+ activate_mood_or_playlist(NULL, &num_admissible);
+ }
+ } else
+ ret2 = para_printf(&pb, "activated %s (%d admissible files)\n", current_mop?
+ current_mop : "dummy mood", num_admissible);
+out:
+ if (ret2 >= 0 && pb.offset)
+ pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+ free(pb.buf);
}
/**
- * Free all resources which were allocated by open_next_audio_file().
+ * Result handler for sending data to the para_client process.
*
- * \param afd The structure previously filled in by open_next_audio_file().
+ * \param result The data to be sent.
+ * \param private Pointer to rc4 context.
*
- * \return The return value of the underlying call to para_munmap().
+ * \return The return value of the underlying call to rc4_send_bin_buffer().
*
- * \sa open_next_audio_file().
+ * \sa \ref callback_result_handler, \ref rc4_send_bin_buffer().
*/
-int close_audio_file(struct audio_file_data *afd)
+int rc4_send_result(struct osl_object *result, void *private)
{
- free(afd->afhi.chunk_table);
- return para_munmap(afd->map.data, afd->map.size);
+ struct rc4_context *rc4c = private;
+
+ if (!result->size)
+ return 1;
+ return rc4_send_bin_buffer(rc4c, result->data, result->size);
}
-#if 0
-static void play_loop(enum play_mode current_play_mode)
+int com_select(struct rc4_context *rc4c, int argc, char * const * const argv)
{
- int i, ret;
- struct audio_file_data afd;
+ struct osl_object query;
- 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);
- }
+ if (argc != 2)
+ return -E_AFS_SYNTAX;
+ query.data = argv[1];
+ query.size = strlen(argv[1]) + 1;
+ return send_callback_request(com_select_callback, &query,
+ &rc4_send_result, rc4c);
}
-#endif
-
-static enum play_mode init_admissible_files(void)
+static void init_admissible_files(char *arg)
{
- 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;
+ 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;
+ int ret, socket_fd;
char *socket_name = conf.afs_socket_arg;
struct sockaddr_un unix_addr;
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);
+ 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,
+ socket_fd);
+ return socket_fd;
}
-static int server_socket;
-static struct command_task command_task_struct;
-static struct signal_task signal_task_struct;
+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 void unregister_tasks(void)
+static char *database_dir;
+
+static void get_database_dir(void)
{
- unregister_task(&command_task_struct.task);
- unregister_task(&signal_task_struct.task);
+ 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-0.4", home);
+ free(home);
+ }
+ }
+ PARA_INFO_LOG("afs_database dir %s\n", database_dir);
}
-static void close_afs_tables(enum osl_close_flags flags)
+static int make_database_dir(void)
{
- PARA_NOTICE_LOG("closing afs_tables\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 ret;
+
+ get_database_dir();
+ ret = para_mkdir(database_dir, 0777);
+ if (ret >= 0 || is_errno(-ret, EEXIST))
+ return 1;
+ return ret;
+}
+
+static int open_afs_tables(void)
+{
+ 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 signal_pre_select(struct sched *s, struct task *t)
{
- struct signal_task *st = t->private_data;
- t->ret = 1;
+ struct signal_task *st = container_of(t, struct signal_task, task);
para_fd_set(st->fd, &s->rfds, &s->max_fileno);
}
-static void signal_post_select(struct sched *s, struct task *t)
+static void afs_signal_post_select(struct sched *s, struct task *t)
{
- struct signal_task *st = t->private_data;
- t->ret = 1;
+ struct signal_task *st = container_of(t, struct signal_task, task);
+ if (getppid() == 1) {
+ PARA_EMERG_LOG("para_server died\n");
+ goto shutdown;
+ }
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 */
- t->ret = -E_SIGNAL_CAUGHT;
- unregister_tasks();
+ if (st->signum == SIGHUP) {
+ close_afs_tables();
+ parse_config_or_die(1);
+ t->error = open_afs_tables();
+ if (t->error < 0)
+ return;
+ init_admissible_files(current_mop);
+ return;
+ }
+ PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
+shutdown:
+ sched_shutdown();
+ t->error = -E_AFS_SIGNAL;
}
static void register_signal_task(void)
{
struct signal_task *st = &signal_task_struct;
+
+ para_sigaction(SIGPIPE, SIG_IGN);
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;
- st->task.private_data = st;
+ st->task.post_select = afs_signal_post_select;
sprintf(st->task.status, "signal task");
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 command_task *ct = container_of(t, struct command_task, task);
+ 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);
+}
+
+/**
+ * Send data as shared memory to a file descriptor.
+ *
+ * \param buf The buffer holding the data to be sent.
+ * \param size The size of \a buf.
+ * \param fd_ptr A pointer to the file descriptor.
+ *
+ * This function is used as the \a max_size handler in a \ref para_buffer
+ * structure. If used this way, it is called by \ref para_printf() whenever
+ * the buffer passed to para_printf() is about to exceed its maximal size.
+ *
+ * This function creates a shared memory area large enough to hold
+ * the content given by \a buf and \a size and sends the identifier
+ * of this area to the file descriptor given by \a fd_ptr.
+ *
+ * \return Zero if \a buf is \p NULL or \a size is zero. Negative on errors,
+ * and positive on success.
+ */
+int pass_buffer_as_shm(char *buf, size_t size, void *fd_ptr)
+{
+ int ret, shmid, fd = *(int *)fd_ptr;
+ void *shm;
+ struct callback_result *cr;
+
+ if (!buf || !size)
+ return 0;
+ ret = shm_new(size + sizeof(struct callback_result));
+ if (ret < 0)
+ return ret;
+ shmid = ret;
+ ret = shm_attach(shmid, ATTACH_RW, &shm);
+ if (ret < 0)
+ goto err;
+ cr = shm;
+ cr->result_size = size;
+ memcpy(shm + sizeof(*cr), buf, size);
+ ret = shm_detach(shm);
+ if (ret < 0)
+ goto err;
+ ret = send_bin_buffer(fd, (char *)&shmid, sizeof(int));
+ if (ret >= 0)
+ return ret;
+err:
+ if (shm_destroy(shmid) < 0)
+ PARA_ERROR_LOG("destroy result failed\n");
+ return ret;
}
/*
*/
static int call_callback(int fd, int query_shmid)
{
- void *query_shm, *result_shm;
+ void *query_shm;
struct callback_query *cq;
- struct callback_result *cr;
- struct osl_object query, result = {.data = NULL};
- int result_shmid = -1, ret, ret2;
+ struct osl_object query;
+ int ret;
ret = shm_attach(query_shmid, ATTACH_RW, &query_shm);
if (ret < 0)
- goto out;
+ return ret;
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;
+ cq->handler(fd, &query);
+ return shm_detach(query_shm);
+}
+
+static int execute_server_command(void)
+{
+ char buf[8];
+ int ret = recv_bin_buffer(server_socket, buf, sizeof(buf) - 1);
+
+ if (ret <= 0) {
+ if (!ret)
+ ret = -ERRNO_TO_PARA_ERROR(ECONNRESET);
+ goto err;
}
+ buf[ret] = '\0';
+ PARA_DEBUG_LOG("received: %s\n", buf);
+ ret = -E_BAD_CMD;
+ if (strcmp(buf, "new"))
+ goto err;
+ ret = open_next_audio_file();
+err:
return ret;
}
-static void command_post_select(struct sched *s, struct task *t)
+static void execute_afs_command(int fd, uint32_t expected_cookie)
{
- 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;
+ int query_shmid;
+ char buf[sizeof(cookie) + sizeof(query_shmid)];
+ int ret = recv_bin_buffer(fd, buf, sizeof(buf));
- t->ret = 1;
- if (!FD_ISSET(ct->fd, &s->rfds))
- return;
- t->ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
- if (t->ret < 0)
- return;
- /*
- * The following errors may be caused by a malicious local user. So do
- * not return an error in this case as this would terminate para_afs
- * and para_server.
- */
- fd = t->ret;
- /* FIXME: This is easily dosable (peer doesn't send data) */
- t->ret = recv_bin_buffer(fd, buf, sizeof(buf));
- if (t->ret < 0) {
- PARA_NOTICE_LOG("%s (%d)\n", PARA_STRERROR(-t->ret), t->ret);
- goto out;
- }
- if (t->ret != sizeof(buf)) {
+ if (ret < 0)
+ goto err;
+ if (ret != sizeof(buf)) {
PARA_NOTICE_LOG("short read (%d bytes, expected %lu)\n",
- t->ret, (long unsigned) sizeof(buf));
- goto out;
+ 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);
- 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);
- goto out;
+ return;
}
- /* Ignore return value: Errors might be ok here. */
- call_callback(fd, query_shmid);
-out:
- t->ret = 1;
- close(fd);
+ ret = call_callback(fd, query_shmid);
+ if (ret >= 0)
+ return;
+err:
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+}
+
+/** 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 = container_of(t, struct command_task, task);
+ struct sockaddr_un unix_addr;
+ struct afs_client *client, *tmp;
+ int fd, ret;
+
+ if (FD_ISSET(server_socket, &s->rfds)) {
+ ret = execute_server_command();
+ if (ret < 0) {
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ sched_shutdown();
+ return;
+ }
+ }
+
+ /* 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))
+ return;
+ ret = para_accept(ct->fd, &unix_addr, sizeof(unix_addr));
+ if (ret < 0) {
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+ return;
+ }
+ fd = ret;
+ ret = mark_fd_nonblocking(fd);
+ if (ret < 0) {
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+ close(fd);
+ return;
+ }
+ client = para_malloc(sizeof(*client));
+ client->fd = fd;
+ client->connect_time = *now;
+ para_list_add(&client->node, &afs_client_list);
}
static void register_command_task(uint32_t 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;
-}
-
-static int open_afs_tables(void)
+/**
+ * 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 = make_database_dir();
+ static struct sched s;
+ int i, ret;
+ register_signal_task();
+ 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)
- 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;
-}
-
-__noreturn int afs_init(uint32_t cookie, int socket_fd)
-{
- enum play_mode current_play_mode;
- struct sched s;
- int ret = open_afs_tables();
-
- if (ret < 0) {
- PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
- exit(EXIT_FAILURE);
- }
+ goto out;
server_socket = socket_fd;
+ ret = mark_fd_nonblocking(server_socket);
+ if (ret < 0)
+ goto out_close;
PARA_INFO_LOG("server_socket: %d, afs_socket_cookie: %u\n",
server_socket, (unsigned) cookie);
- current_play_mode = init_admissible_files();
- register_tasks(cookie);
+ init_admissible_files(conf.afs_initial_mode_arg);
+ register_command_task(cookie);
s.default_timeout.tv_sec = 0;
- s.default_timeout.tv_usec = 99 * 1000;
- ret = sched(&s);
+ s.default_timeout.tv_usec = 999 * 1000;
+ ret = schedule(&s);
+out_close:
+ close_afs_tables();
+out:
if (ret < 0)
- PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
- close_afs_tables(OSL_MARK_CLEAN);
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
exit(EXIT_FAILURE);
}
-static int create_tables_callback(const struct osl_object *query,
- __a_unused struct osl_object *result)
+static void create_tables_callback(int fd, const struct osl_object *query)
{
uint32_t table_mask = *(uint32_t *)query->data;
int i, ret;
+ char *buf;
- close_afs_tables(OSL_MARK_CLEAN);
+ 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)
- continue;
if (!(table_mask & (1 << i)))
continue;
- ret = osl_create_table(ti->desc);
+ if (!t->create)
+ continue;
+ ret = t->create(database_dir);
if (ret < 0)
- return ret;
+ goto out;
}
ret = open_afs_tables();
- return ret < 0? ret: 0;
+out:
+ if (ret >= 0)
+ buf = make_message("successfully created afs table(s)\n");
+ else
+ buf = make_message("%s\n", para_strerror(-ret));
+ pass_buffer_as_shm(buf, strlen(buf), &fd);
+ free(buf);
}
-int com_init(int fd, int argc, char * const * const argv)
+int com_init(struct rc4_context *rc4c, 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)};
+ 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 table_info *ti = afs_tables + j;
+ struct afs_table *t = &afs_tables[j];
- if (ti->flags & TBLFLAG_SKIP_CREATE)
- continue;
- if (strcmp(argv[i], ti->desc->name))
+ if (strcmp(argv[i], t->name))
continue;
table_mask |= (1 << j);
break;
return -E_BAD_TABLE_NAME;
}
}
- ret = send_callback_request(create_tables_callback, &query, NULL);
+ ret = send_callback_request(create_tables_callback, &query,
+ rc4_send_result, rc4c);
if (ret < 0)
- return ret;
- return send_va_buffer(fd, "successfully created afs table(s)\n");
+ return rc4_send_va_buffer(rc4c, "%s\n", para_strerror(-ret));
+ return ret;
+}
+
+/**
+ * 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
+};
+
+int com_check(struct rc4_context *rc4c, int argc, char * const * const argv)
+{
+ unsigned flags = 0;
+ int i, ret;
+
+ 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,
+ rc4_send_result, rc4c);
+ if (ret < 0)
+ return ret;
+ }
+ if (flags & CHECK_PLAYLISTS) {
+ ret = send_callback_request(playlist_check_callback,
+ NULL, rc4_send_result, rc4c);
+ if (ret < 0)
+ return ret;
+ }
+ if (flags & CHECK_MOODS) {
+ ret = send_callback_request(mood_check_callback, NULL,
+ rc4_send_result, rc4c);
+ if (ret < 0)
+ return ret;
+ }
+ return 1;
+}
+
+/**
+ * The afs event dispatcher.
+ *
+ * \param event Type of the event.
+ * \param pb May be \p NULL.
+ * \param data Type depends on \a event.
+ *
+ * This function calls the table handlers of all tables and passes \a pb and \a
+ * data verbatim. It's up to the handlers to interpret the \a data pointer.
+ */
+void afs_event(enum afs_events event, struct para_buffer *pb,
+ void *data)
+{
+ int i, ret;
+
+ for (i = 0; i < NUM_AFS_TABLES; i++) {
+ struct afs_table *t = &afs_tables[i];
+ if (!t->event_handler)
+ continue;
+ ret = t->event_handler(event, pb, data);
+ if (ret < 0)
+ PARA_CRIT_LOG("table %s, event %d: %s\n", t->name,
+ event, para_strerror(-ret));
+ }
+}
+
+int images_event_handler(__a_unused enum afs_events event,
+ __a_unused struct para_buffer *pb, __a_unused void *data)
+{
+ return 1;
+}
+
+int lyrics_event_handler(__a_unused enum afs_events event,
+ __a_unused struct para_buffer *pb, __a_unused void *data)
+{
+ return 1;
}
projects / paraslash.git / blobdiff