+static time_t last_io_in;
+static time_t last_io_out;
+static int no_flush;
+
+static int write_batch_monitor_in = -1;
+static int write_batch_monitor_out = -1;
+
+static int io_filesfrom_f_in = -1;
+static int io_filesfrom_f_out = -1;
+static xbuf ff_buf = EMPTY_XBUF;
+static char ff_lastchar;
+#ifdef ICONV_OPTION
+static xbuf iconv_buf = EMPTY_XBUF;
+#endif
+static int defer_forwarding_messages = 0;
+static int select_timeout = SELECT_TIMEOUT;
+static int active_filecnt = 0;
+static OFF_T active_bytecnt = 0;
+
+static char int_byte_extra[64] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */
+ 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */
+};
+
+enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND };
+
+static void readfd(int fd, char *buffer, size_t N);
+static void writefd(int fd, const char *buf, size_t len);
+static void writefd_unbuffered(int fd, const char *buf, size_t len);
+static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert);
+
+struct flist_ndx_item {
+ struct flist_ndx_item *next;
+ int ndx;
+};
+
+struct flist_ndx_list {
+ struct flist_ndx_item *head, *tail;
+};
+
+static struct flist_ndx_list redo_list, hlink_list;
+
+struct msg_list_item {
+ struct msg_list_item *next;
+ char convert;
+ char buf[1];
+};
+
+struct msg_list {
+ struct msg_list_item *head, *tail;
+};
+
+static struct msg_list msg_queue;