+int make_status_items(struct ls_data *d, struct para_buffer *pb);
+void make_empty_status_items(char *buf);
+
+/** At most that many bytes will be passed from afs to para_server. */
+#define VERBOSE_LS_OUTPUT_SIZE 4096
+
+/** Data about the current audio file, passed from afs to server. */
+struct audio_file_data {
+ /** Same info as ls -lv -p current audio_file. */
+ char verbose_ls_output[VERBOSE_LS_OUTPUT_SIZE];
+ /** The open file descriptor to the current audio file. */
+ int fd;
+ /** Vss needs this for streaming. */
+ struct afh_info afhi;
+};
+
+enum afs_server_code {
+ NEXT_AUDIO_FILE,
+ NO_ADMISSIBLE_FILES,
+ AFD_CHANGE
+};
+
+/** Flags passed to for_each_matching_row(). */
+enum pattern_match_flags {
+ /** Loop in reverse order. */
+ PM_REVERSE_LOOP = 1,
+ /** If no pattern is given, loop over all rows. */
+ PM_NO_PATTERN_MATCHES_EVERYTHING = 2,
+ /** If the data in match_column is the empty string, skip this row. */
+ PM_SKIP_EMPTY_NAME = 4,
+};
+
+/** Structure passed to for_each_matching_row(). */
+struct pattern_match_data {
+ /** Loop over all rows in this table. */
+ struct osl_table *table;
+ /** Determines the loop order. Must be an rbtree column. */
+ unsigned loop_col_num;
+ /** Data from this column is matched against the given patterns. */
+ unsigned match_col_num;
+ /** \see pattern_match_flags. */
+ unsigned pm_flags;
+ /** This value is passed verbatim to fnmatch(). */
+ int fnmatch_flags;
+ /** Null-terminated array of patterns. */
+ struct osl_object patterns;
+ /** Data pointer passed to the action function. */
+ void *data;
+ /** For each matching row, this function will be called. */
+ int (*action)(struct osl_table *table, struct osl_row *row, const char *name, void *data);
+};
+
+
+/**
+ * Afs command handlers run as a process which is not related to the afs
+ * process, i.e. they can not change the address space of afs directly.
+ * Therefore afs commands typically consist of two functions: The command
+ * handler and the corresponding callback function that runs in afs context.
+ *
+ * \sa send_callback_request().
+ */
+typedef void callback_function(int fd, const struct osl_object *);
+
+/**
+ * Callbacks send chunks to data back to the command handler. Pointers to
+ * this type of function are used by \ref send_callback_request and friends
+ * to deal with the data in the command handler process.
+ *
+ * \sa \ref send_callback_request().
+ */
+typedef int callback_result_handler(struct osl_object *result, void *private);
+int send_result(struct osl_object *result, void *fd_ptr);
+int pass_buffer_as_shm(char *buf, size_t size, void *fd_ptr);