Cleanup part 1: split up server.c.

5 files changed, 603 insertions, 779 deletions

diff --git a/Makefile b/Makefile
index 043aedb9..80a3b003 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.3 2007-09-20 18:48:04 nicm Exp $
+# $Id: Makefile,v 1.4 2007-09-26 10:35:24 nicm Exp $
 
 .SUFFIXES: .c .o .y .h
 .PHONY: clean
@@ -16,8 +16,9 @@ DEBUG=
 # Command prefix. This will go when we get a configuration file...
 META?= \002 # C-b
 
-SRCS= tmux.c server.c buffer.c buffer-poll.c xmalloc.c xmalloc-debug.c \
-      input.c screen.c window.c session.c local.c log.c command.c
+SRCS= tmux.c server.c server-msg.c server-fn.c buffer.c buffer-poll.c \
+      xmalloc.c xmalloc-debug.c input.c screen.c window.c session.c local.c \
+      log.c command.c
 
 YACC= yacc -d
 
diff --git a/server-fn.c b/server-fn.c
new file mode 100644
index 00000000..1332d03d
--- /dev/null
+++ b/server-fn.c
@@ -0,0 +1,162 @@
+/* $Id: server-fn.c,v 1.1 2007-09-26 10:35:24 nicm Exp $ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <string.h>
+
+#include "tmux.h"
+
+/* Write command to a client. */
+void
+write_client(struct client *c, u_int cmd, void *buf, size_t len)
+{
+	struct hdr	 hdr;
+
+	hdr.type = cmd;
+	hdr.size = len;
+
+	buffer_write(c->out, &hdr, sizeof hdr);
+	if (buf != NULL)
+		buffer_write(c->out, buf, len);
+}
+
+/* Write command to a client with two buffers. */
+void
+write_client2(struct client *c,
+    u_int cmd, void *buf1, size_t len1, void *buf2, size_t len2)
+{
+	struct hdr	 hdr;
+
+	hdr.type = cmd;
+	hdr.size = len1 + len2;
+
+	buffer_write(c->out, &hdr, sizeof hdr);
+	if (buf1 != NULL)
+		buffer_write(c->out, buf1, len1);
+	if (buf2 != NULL)
+		buffer_write(c->out, buf2, len2);
+}
+
+/* Write command to all clients attached to a specific window. */
+void
+write_clients(struct window *w, u_int cmd, void *buf, size_t len)
+{
+	struct client	*c;
+ 	struct hdr	 hdr;
+	u_int		 i;
+
+	hdr.type = cmd;
+	hdr.size = len;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c != NULL && c->session != NULL) {
+			if (c->session->window == w) {
+				buffer_write(c->out, &hdr, sizeof hdr);
+				if (buf != NULL)
+					buffer_write(c->out, buf, len);
+			}
+		}
+	}
+}
+
+/* Changed client window. */
+void
+changed_window(struct client *c)
+{
+	struct window	*w;
+
+	w = c->session->window;
+	if (c->sx != w->screen.sx || c->sy != w->screen.sy)
+		window_resize(w, c->sx, c->sy);
+	draw_client(c, 0, c->sy - 1);
+}
+
+/* Draw window on client. */
+void
+draw_client(struct client *c, u_int py_upper, u_int py_lower)
+{
+	struct hdr	hdr;
+	size_t		size;
+
+	buffer_ensure(c->out, sizeof hdr);
+	buffer_add(c->out, sizeof hdr);
+	size = BUFFER_USED(c->out);
+
+	screen_draw(&c->session->window->screen, c->out, py_upper, py_lower);
+
+	size = BUFFER_USED(c->out) - size;
+	log_debug("redrawing screen, %zu bytes", size);
+	if (size != 0) {
+		hdr.type = MSG_OUTPUT;
+		hdr.size = size;
+		memcpy(
+		    BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
+	} else
+		buffer_reverse_add(c->out, sizeof hdr);
+}
+
+
+/* Write message command to a client. */
+void
+write_message(struct client *c, const char *fmt, ...)
+{
+	struct hdr	 hdr;
+	va_list		 ap;
+	char		*msg;
+	size_t		 size;
+	u_int		 i;
+
+	buffer_ensure(c->out, sizeof hdr);
+	buffer_add(c->out, sizeof hdr);
+	size = BUFFER_USED(c->out);
+
+	input_store_zero(c->out, CODE_CURSOROFF);
+	input_store_two(c->out, CODE_CURSORMOVE, c->sy, 1);
+	input_store_one(c->out, CODE_ATTRIBUTES, 2);
+	input_store16(c->out, 0);
+	input_store16(c->out, 7);
+	va_start(ap, fmt);
+	xvasprintf(&msg, fmt, ap);
+	va_end(ap);
+	buffer_write(c->out, msg, strlen(msg));
+	for (i = strlen(msg); i < c->sx; i++)
+		input_store8(c->out, ' ');
+	xfree(msg);
+
+	size = BUFFER_USED(c->out) - size;
+	hdr.type = MSG_OUTPUT;
+	hdr.size = size;
+	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
+
+	hdr.type = MSG_PAUSE;
+	hdr.size = 0;
+	buffer_write(c->out, &hdr, sizeof hdr);
+
+	buffer_ensure(c->out, sizeof hdr);
+	buffer_add(c->out, sizeof hdr);
+	size = BUFFER_USED(c->out);
+
+	screen_draw(&c->session->window->screen, c->out, c->sy - 1, c->sy - 1);
+
+	size = BUFFER_USED(c->out) - size;
+	hdr.type = MSG_OUTPUT;
+	hdr.size = size;
+	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
+}
diff --git a/server-msg.c b/server-msg.c
new file mode 100644
index 00000000..8bf5af2a
--- /dev/null
+++ b/server-msg.c
@@ -0,0 +1,420 @@
+/* $Id: server-msg.c,v 1.1 2007-09-26 10:35:24 nicm Exp $ */
+
+/*
+ * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+void	server_msg_fn_attach(struct client *, struct hdr *);
+void	server_msg_fn_create(struct client *, struct hdr *);
+void	server_msg_fn_input(struct client *, struct hdr *);
+void	server_msg_fn_last(struct client *, struct hdr *);
+void	server_msg_fn_new(struct client *, struct hdr *);
+void	server_msg_fn_next(struct client *, struct hdr *);
+void	server_msg_fn_previous(struct client *, struct hdr *);
+void	server_msg_fn_refresh(struct client *, struct hdr *);
+void	server_msg_fn_rename(struct client *, struct hdr *);
+void	server_msg_fn_select(struct client *, struct hdr *);
+void	server_msg_fn_sessions(struct client *, struct hdr *);
+void	server_msg_fn_size(struct client *, struct hdr *);
+void	server_msg_fn_windowlist(struct client *, struct hdr *);
+void	server_msg_fn_windows(struct client *, struct hdr *);
+
+struct server_msg {
+	enum hdrtype	type;
+	
+	void	        (*fn)(struct client *, struct hdr *);
+};
+struct server_msg server_msg_table[] = {
+	{ MSG_ATTACH, server_msg_fn_attach },
+	{ MSG_CREATE, server_msg_fn_create },
+	{ MSG_INPUT, server_msg_fn_input },
+	{ MSG_LAST, server_msg_fn_last },
+	{ MSG_NEW, server_msg_fn_new },
+	{ MSG_NEXT, server_msg_fn_next },
+	{ MSG_PREVIOUS, server_msg_fn_previous },
+	{ MSG_REFRESH, server_msg_fn_refresh },
+	{ MSG_RENAME, server_msg_fn_rename },
+	{ MSG_SELECT, server_msg_fn_select },
+	{ MSG_SESSIONS, server_msg_fn_sessions },
+	{ MSG_SIZE, server_msg_fn_size },
+	{ MSG_WINDOWLIST, server_msg_fn_windowlist },
+	{ MSG_WINDOWS, server_msg_fn_windows },
+};
+#define NSERVERMSG (sizeof server_msg_table / sizeof server_msg_table[0])
+
+void
+server_msg_dispatch(struct client *c)
+{
+	struct hdr		 hdr;
+	struct server_msg	*msg;
+	u_int		 	 i;
+
+	if (BUFFER_USED(c->in) < sizeof hdr)
+		return;
+	memcpy(&hdr, BUFFER_OUT(c->in), sizeof hdr);
+	if (BUFFER_USED(c->in) < (sizeof hdr) + hdr.size)
+		return;
+	buffer_remove(c->in, sizeof hdr);
+
+	for (i = 0; i < NSERVERMSG; i++) {
+		msg = server_msg_table + i;
+		if (msg->type == hdr.type) {
+			msg->fn(c, &hdr);
+			return;
+		}
+	}
+
+	fatalx("unexpected message");
+}
+
+/* New message from client. */
+void
+server_msg_fn_new(struct client *c, struct hdr *hdr)
+{
+	struct new_data	 data;
+	const char      *shell;
+	char		*cmd, *msg;
+	
+	if (c->session != NULL)
+		return;
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_NEW size");
+	buffer_read(c->in, &data, hdr->size);
+
+	c->sx = data.sx;
+	if (c->sx == 0)
+		c->sx = 80;
+	c->sy = data.sy;
+	if (c->sy == 0)
+		c->sy = 25;
+
+	if (*data.name != '\0' && session_find(data.name) != NULL) {
+		xasprintf(&msg, "duplicate session: %s", data.name);
+		write_client(c, MSG_READY, msg, strlen(msg));
+		xfree(msg);
+		return;
+	}
+
+	shell = getenv("SHELL");
+	if (shell == NULL)
+		shell = "/bin/ksh";
+	xasprintf(&cmd, "%s -l", shell);
+	c->session = session_create(data.name, cmd, c->sx, c->sy);
+	if (c->session == NULL)
+		fatalx("session_create failed");
+	xfree(cmd);
+	
+	write_client(c, MSG_READY, NULL, 0);
+	draw_client(c, 0, c->sy - 1);
+}
+
+/* Attach message from client. */
+void
+server_msg_fn_attach(struct client *c, struct hdr *hdr)
+{
+	struct attach_data	 data;
+	char			*msg;
+	
+	if (c->session != NULL)
+		return;
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_ATTACH size");
+	buffer_read(c->in, &data, hdr->size);
+
+	c->sx = data.sx;
+	if (c->sx == 0)
+		c->sx = 80;
+	c->sy = data.sy;
+	if (c->sy == 0)
+		c->sy = 25;
+
+	if (*data.name != '\0')
+		c->session = session_find(data.name);
+	if (c->session == NULL) {
+		xasprintf(&msg, "session not found: %s", data.name);
+		write_client(c, MSG_READY, msg, strlen(msg));
+		xfree(msg);
+		return;
+	}
+
+	write_client(c, MSG_READY, NULL, 0);
+	draw_client(c, 0, c->sy - 1);
+}
+
+/* Create message from client. */
+void
+server_msg_fn_create(struct client *c, struct hdr *hdr)
+{
+	const char	*shell;
+	char		*cmd;
+
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_CREATE size");
+
+	shell = getenv("SHELL");
+	if (shell == NULL)
+		shell = "/bin/ksh";
+	xasprintf(&cmd, "%s -l", shell);
+	if (session_new(c->session, cmd, c->sx, c->sy) != 0)
+		fatalx("session_new failed");
+	xfree(cmd);
+
+	draw_client(c, 0, c->sy - 1);
+}
+
+/* Next message from client. */
+void
+server_msg_fn_next(struct client *c, struct hdr *hdr)
+{
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_NEXT size");
+
+	if (session_next(c->session) == 0)
+		changed_window(c);
+	else
+		write_message(c, "No next window"); 
+}
+
+/* Previous message from client. */
+void
+server_msg_fn_previous(struct client *c, struct hdr *hdr)
+{
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_PREVIOUS size");
+
+	if (session_previous(c->session) == 0)
+		changed_window(c);
+	else
+		write_message(c, "No previous window"); 
+}
+
+/* Size message from client. */
+void
+server_msg_fn_size(struct client *c, struct hdr *hdr)
+{
+	struct size_data	data;
+
+	if (c->session == NULL)
+		return;
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_SIZE size");
+	buffer_read(c->in, &data, hdr->size);
+
+	c->sx = data.sx;
+	if (c->sx == 0)
+		c->sx = 80;
+	c->sy = data.sy;
+	if (c->sy == 0)
+		c->sy = 25;
+
+	if (window_resize(c->session->window, c->sx, c->sy) != 0)
+		draw_client(c, 0, c->sy - 1);
+}
+
+/* Input message from client. */
+void
+server_msg_fn_input(struct client *c, struct hdr *hdr)
+{
+	if (c->session == NULL)
+		return;
+	
+	window_input(c->session->window, c->in, hdr->size);
+}
+
+/* Refresh message from client. */
+void
+server_msg_fn_refresh(struct client *c, struct hdr *hdr)
+{
+	struct refresh_data	data;
+
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0 && hdr->size != sizeof data)
+		fatalx("bad MSG_REFRESH size");
+
+	draw_client(c, 0, c->sy - 1);
+}
+
+/* Select message from client. */
+void
+server_msg_fn_select(struct client *c, struct hdr *hdr)
+{
+	struct select_data	data;
+
+	if (c->session == NULL)
+		return;
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_SELECT size");
+	buffer_read(c->in, &data, hdr->size);
+
+	if (c->session == NULL)
+		return;
+	if (session_select(c->session, data.idx) == 0)
+		changed_window(c);
+	else
+		write_message(c, "Window %u not present", data.idx); 
+}
+
+/* Sessions message from client. */
+void
+server_msg_fn_sessions(struct client *c, struct hdr *hdr)
+{
+	struct sessions_data	 data;
+	struct sessions_entry	 entry;
+	struct session		*s;
+	u_int			 i, j;
+
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_SESSIONS size");
+	buffer_read(c->in, &data, hdr->size);
+
+	data.sessions = 0;
+	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
+		if (ARRAY_ITEM(&sessions, i) != NULL)
+			data.sessions++;
+	}
+	write_client2(c, MSG_SESSIONS,
+	    &data, sizeof data, NULL, data.sessions * sizeof entry);
+
+	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
+		s = ARRAY_ITEM(&sessions, i);
+		if (s == NULL)
+			continue;
+		strlcpy(entry.name, s->name, sizeof entry.name);
+		entry.tim = s->tim;
+		entry.windows = 0;
+		for (j = 0; j < ARRAY_LENGTH(&s->windows); j++) {
+			if (ARRAY_ITEM(&s->windows, j) != NULL)
+				entry.windows++;
+		}
+		buffer_write(c->out, &entry, sizeof entry);
+	}
+}
+
+/* Windows message from client. */
+void
+server_msg_fn_windows(struct client *c, struct hdr *hdr)
+{
+	struct windows_data	 data;
+	struct windows_entry	 entry;
+	struct session		*s;
+	struct window		*w;
+	u_int			 i;
+
+	if (hdr->size != sizeof data)
+		fatalx("bad MSG_WINDOWS size");
+	buffer_read(c->in, &data, hdr->size);
+
+	s = session_find(data.name);
+	if (s == NULL) {
+		data.windows = 0;
+		write_client(c, MSG_WINDOWS, &data, sizeof data);
+		return;
+	}
+
+	data.windows = 0;
+	for (i = 0; i < ARRAY_LENGTH(&s->windows); i++) {
+		if (ARRAY_ITEM(&windows, i) != NULL)
+			data.windows++;
+	}
+	write_client2(c, MSG_WINDOWS,
+	    &data, sizeof data, NULL, data.windows * sizeof entry);
+	
+	for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
+		w = ARRAY_ITEM(&windows, i);
+		if (w == NULL)
+			continue;
+		entry.idx = i;
+		strlcpy(entry.name, w->name, sizeof entry.name);
+		strlcpy(entry.title, w->screen.title, sizeof entry.title);
+		if (ttyname_r(w->fd, entry.tty, sizeof entry.tty) != 0)
+			*entry.tty = '\0';
+		buffer_write(c->out, &entry, sizeof entry);
+	}
+}
+
+/* Rename message from client. */
+void
+server_msg_fn_rename(struct client *c, struct hdr *hdr)
+{
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_RENAME size");
+
+	fatalx("not implemented");
+}
+
+/* Last window message from client */
+void
+server_msg_fn_last(struct client *c, struct hdr *hdr)
+{
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_LAST size");
+
+	if (session_last(c->session) == 0)
+		changed_window(c);
+	else
+		write_message(c, "No last window"); 
+}
+
+/* Window list message from client */
+void
+server_msg_fn_windowlist(struct client *c, struct hdr *hdr)
+{
+	struct window	*w;
+	char 		*buf;
+	size_t		 len, off;
+	u_int 		 i;
+
+	if (c->session == NULL)
+		return;
+	if (hdr->size != 0)
+		fatalx("bad MSG_WINDOWLIST size");
+
+	len = c->sx + 1;
+	buf = xmalloc(len);
+	off = 0;
+
+	*buf = '\0';
+	for (i = 0; i < ARRAY_LENGTH(&c->session->windows); i++) {
+		w = ARRAY_ITEM(&c->session->windows, i);
+		if (w == NULL)
+			continue;
+		off += xsnprintf(buf + off, len - off, "%u:%s%s ", i, w->name, 
+		    w == c->session->window ? "*" : "");
+		if (off >= len)
+			break;
+	}
+
+	write_message(c, "%s", buf);
+	xfree(buf);
+}
diff --git a/server.c b/server.c
index 253725a5..21a35f4f 100644
--- a/server.c
+++ b/server.c
@@ -1,4 +1,4 @@
-/* $Id: server.c,v 1.11 2007-09-22 11:50:33 nicm Exp $ */
+/* $Id: server.c,v 1.12 2007-09-26 10:35:24 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -50,34 +50,7 @@ void		 fill_clients(struct pollfd **);
 void		 handle_clients(struct pollfd **);
 struct client	*accept_client(int);
 void		 lost_client(struct client *);
-void	 	 user_start(struct client *, const char *, const char *,
-		     size_t, void (*)(struct client *, const char *));
-void		 user_input(struct client *, size_t);
-void		 write_message(struct client *, const char *, ...);
-void		 write_client(struct client *, u_int, void *, size_t);
-void		 write_client2(
-		     struct client *, u_int, void *, size_t, void *, size_t);
-void		 write_clients(struct window *, u_int, void *, size_t);
-void		 new_window(struct window *);
-void		 lost_window(struct window *);
-void		 changed_window(struct client *);
-void		 draw_client(struct client *, u_int, u_int);
-void	 	 process_client(struct client *);
-void		 process_new_msg(struct client *, struct hdr *);
-void		 process_attach_msg(struct client *, struct hdr *);
-void		 process_create_msg(struct client *, struct hdr *);
-void		 process_next_msg(struct client *, struct hdr *);
-void		 process_previous_msg(struct client *, struct hdr *);
-void		 process_select_msg(struct client *, struct hdr *);
-void		 process_size_msg(struct client *, struct hdr *);
-void		 process_input_msg(struct client *, struct hdr *);
-void		 process_refresh_msg(struct client *, struct hdr *);
-void		 process_sessions_msg(struct client *, struct hdr *);
-void		 process_windows_msg(struct client *, struct hdr *);
-void		 process_rename_msg(struct client *, struct hdr *);
-void		 process_last_msg(struct client *, struct hdr *);
-void		 process_windowlist_msg(struct client *, struct hdr *);
-void		 rename_callback(struct client *, const char *);
+void	 	 lost_window(struct window *);
 
 /* Fork and start server process. */
 int
@@ -302,7 +275,7 @@ handle_clients(struct pollfd *(*pfd))
 			if (buffer_poll((*pfd), c->in, c->out) != 0)
 				lost_client(c);
 			else
-				process_client(c);
+				server_msg_dispatch(c);
 		}
 		(*pfd)++;
 	}
@@ -334,7 +307,6 @@ accept_client(int srv_fd)
 	c->in = buffer_create(BUFSIZ);
 	c->out = buffer_create(BUFSIZ);
 	c->session = NULL;
-	c->prompt = NULL;
 
 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		if (ARRAY_ITEM(&clients, i) == NULL) {
@@ -363,302 +335,6 @@ lost_client(struct client *c)
 	xfree(c);
 }
 
-/* Write message command to a client. */
-void
-write_message(struct client *c, const char *fmt, ...)
-{
-	struct hdr	 hdr;
-	va_list		 ap;
-	char		*msg;
-	size_t		 size;
-	u_int		 i;
-
-	buffer_ensure(c->out, sizeof hdr);
-	buffer_add(c->out, sizeof hdr);
-	size = BUFFER_USED(c->out);
-
-	input_store_zero(c->out, CODE_CURSOROFF);
-	input_store_two(c->out, CODE_CURSORMOVE, c->sy, 1);
-	input_store_one(c->out, CODE_ATTRIBUTES, 2);
-	input_store16(c->out, 0);
-	input_store16(c->out, 7);
-	va_start(ap, fmt);
-	xvasprintf(&msg, fmt, ap);
-	va_end(ap);
-	buffer_write(c->out, msg, strlen(msg));
-	for (i = strlen(msg); i < c->sx; i++)
-		input_store8(c->out, ' ');
-	xfree(msg);
-
-	size = BUFFER_USED(c->out) - size;
-	hdr.type = MSG_OUTPUT;
-	hdr.size = size;
-	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
-
-	hdr.type = MSG_PAUSE;
-	hdr.size = 0;
-	buffer_write(c->out, &hdr, sizeof hdr);
-
-	buffer_ensure(c->out, sizeof hdr);
-	buffer_add(c->out, sizeof hdr);
-	size = BUFFER_USED(c->out);
-
-	screen_draw(&c->session->window->screen, c->out, c->sy - 1, c->sy - 1);
-
-	size = BUFFER_USED(c->out) - size;
-	hdr.type = MSG_OUTPUT;
-	hdr.size = size;
-	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
-}
-
-/* Start user input. */
-void
-user_start(struct client *c, const char *prompt, const char *now, 
-    size_t len, void (*callback)(struct client *, const char *))
-{
-	struct hdr	 hdr;
-	size_t		 size;
-	u_int		 i;
-
-	c->callback = callback;
-	c->prompt = prompt;
-
-	c->len = len;
-	if (c->len > c->sx - strlen(c->prompt))
-		c->len = c->sx - strlen(c->prompt);
-	c->buf = xmalloc(c->len + 1);
-	strlcpy(c->buf, now, c->len + 1);
-	c->idx = strlen(c->buf);
-
-	buffer_ensure(c->out, sizeof hdr);
-	buffer_add(c->out, sizeof hdr);
-	size = BUFFER_USED(c->out);
-
-	input_store_zero(c->out, CODE_CURSOROFF);
-	input_store_two(c->out, CODE_CURSORMOVE, c->sy, 1);
-	input_store_one(c->out, CODE_ATTRIBUTES, 2);
-	input_store16(c->out, 0);
-	input_store16(c->out, 7);
-
-	i = 0;
-	buffer_write(c->out, c->prompt, strlen(c->prompt));
-	i += strlen(c->prompt);
-	if (*c->buf != '\0') {
-		buffer_write(c->out, c->buf, strlen(c->buf));
-		i += strlen(c->buf);
-	}
-	for (; i < c->sx; i++)
-		input_store8(c->out, ' ');
-
-	input_store_two(c->out,
-	    CODE_CURSORMOVE, c->sy, 1 + strlen(c->prompt) + c->idx);
-	input_store_zero(c->out, CODE_CURSORON);
-
-	size = BUFFER_USED(c->out) - size;
-	hdr.type = MSG_OUTPUT;
-	hdr.size = size;
-	memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
-}
-
-/* Handle user input. */
-void
-user_input(struct client *c, size_t in)
-{
-	struct hdr	hdr;
-	size_t		size;
-	int		key;
-	u_int		i;
-
-	buffer_ensure(c->out, sizeof hdr);
-	buffer_add(c->out, sizeof hdr);
-	size = BUFFER_USED(c->out);
-
-	while (in != 0) {
-		if (in < 1)
-			break;
-		in--;
-		key = input_extract8(c->in);
-		if (key == '\e') {
-			if (in < 2)
-				fatalx("underflow");
-			in -= 2;
-			key = (int16_t) input_extract16(c->in);
-		}
-
-	again:
-		if (key == '\r') {
-			screen_draw(&c->session->window->screen,
-			    c->out, c->sy - 1, c->sy - 1);
-
-			c->callback(c, c->buf);
-			c->prompt = NULL;
-			xfree(c->buf);
-			break;
-		}
-
-		switch (key) {
-		case KEYC_LEFT:
-			if (c->idx > 0)
-				c->idx--;
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			break;
-		case KEYC_RIGHT:
-			if (c->idx < strlen(c->buf))
-				c->idx++;
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			break;
-		case KEYC_HOME:
-			c->idx = 0;
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			break;
-		case KEYC_LL:
-			c->idx = strlen(c->buf);
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			break;
-		case KEYC_BACKSPACE:
-			if (c->idx == 0)
-				break;
-			if (strlen(c->buf) == 0)
-				break;
-			if (c->idx == strlen(c->buf))
-				c->buf[c->idx - 1] = '\0';
-			else {
-				memmove(c->buf + c->idx - 1,
-				    c->buf + c->idx, c->len - c->idx);
-			}
-			c->idx--;
-			input_store_one(c->out, CODE_CURSORLEFT, 1);
-			input_store_one(c->out, CODE_DELETECHARACTER, 1);
-			input_store_zero(c->out, CODE_CURSOROFF);
-			input_store_two(c->out, CODE_CURSORMOVE, c->sy, c->sx);
-			input_store8(c->out, ' ');
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			input_store_zero(c->out, CODE_CURSORON);
-			break;
-		case KEYC_DC:
-			if (strlen(c->buf) == 0)
-				break;
-			if (c->idx == strlen(c->buf))
-				break;
-			memmove(c->buf + c->idx,
-			    c->buf + c->idx + 1, c->len - c->idx - 1);
-			input_store_one(c->out, CODE_DELETECHARACTER, 1);
-			input_store_zero(c->out, CODE_CURSOROFF);
-			input_store_two(c->out,CODE_CURSORMOVE, c->sy, c->sx);
-			input_store8(c->out, ' ');
-			input_store_two(c->out, CODE_CURSORMOVE,
-			    c->sy, 1 + strlen(c->prompt) + c->idx);
-			input_store_zero(c->out, CODE_CURSORON);
-			break;
-		default:
-			if (key >= ' ' && key != '\177') {
-				if (c->idx == c->len)
-					break;
-				if (strlen(c->buf) == c->len)
-					break;
-				memmove(c->buf + c->idx + 1,
-				    c->buf + c->idx, c->len - c->idx);
-				c->buf[c->idx++] = key;
-				input_store_one(
-				    c->out, CODE_INSERTCHARACTER, 1);
-				input_store8(c->out, key);
-				break;
-			}
-			switch (key) {
-			case '\001':
-				key = KEYC_HOME;
-				goto again;
-			case '\005':
-				key = KEYC_LL;
-				goto again;
-			case '\010':
-				key = KEYC_BACKSPACE;
-				goto again;
-			case '\177':
-				key = KEYC_DC;
-				goto again;
-			case '\013':
-				c->buf[c->idx + 1] = '\0';
-				input_store_zero(c->out, CODE_CURSOROFF);
-				i = 1 + strlen(c->prompt) + c->idx;
-				for (; i < c->sx; i++)
-					input_store8(c->out, ' ');
-				input_store_two(c->out, CODE_CURSORMOVE,
-				    c->sy, 1 + strlen(c->prompt) + c->idx);
-				input_store_zero(c->out, CODE_CURSORON);
-				break;
-			}
-		}
-	}
-
-	size = BUFFER_USED(c->out) - size;
-	if (size != 0) {
-		hdr.type = MSG_OUTPUT;
-		hdr.size = size;
-		memcpy(BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
-	} else
-		buffer_reverse_add(c->out, sizeof hdr);
-}
-
-/* Write command to a client. */
-void
-write_client(struct client *c, u_int cmd, void *buf, size_t len)
-{
-	struct hdr	 hdr;
-
-	hdr.type = cmd;
-	hdr.size = len;
-
-	buffer_write(c->out, &hdr, sizeof hdr);
-	if (buf != NULL)
-		buffer_write(c->out, buf, len);
-}
-
-/* Write command to a client with two buffers. */
-void
-write_client2(struct client *c,
-    u_int cmd, void *buf1, size_t len1, void *buf2, size_t len2)
-{
-	struct hdr	 hdr;
-
-	hdr.type = cmd;
-	hdr.size = len1 + len2;
-
-	buffer_write(c->out, &hdr, sizeof hdr);
-	if (buf1 != NULL)
-		buffer_write(c->out, buf1, len1);
-	if (buf2 != NULL)
-		buffer_write(c->out, buf2, len2);
-}
-
-/* Write command to all clients attached to a specific window. */
-void
-write_clients(struct window *w, u_int cmd, void *buf, size_t len)
-{
-	struct client	*c;
- 	struct hdr	 hdr;
-	u_int		 i;
-
-	hdr.type = cmd;
-	hdr.size = len;
-
-	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
-		c = ARRAY_ITEM(&clients, i);
-		if (c != NULL && c->session != NULL) {
-			if (c->session->window == w) {
-				buffer_write(c->out, &hdr, sizeof hdr);
-				if (buf != NULL)
-					buffer_write(c->out, buf, len);
-			}
-		}
-	}
-}
-
 /* Lost window: move clients on to next window. */
 void
 lost_window(struct window *w)
@@ -690,443 +366,3 @@ lost_window(struct window *w)
 	}
 }
 
-/* Changed client window. */
-void
-changed_window(struct client *c)
-{
-	struct window	*w;
-
-	w = c->session->window;
-	if (c->sx != w->screen.sx || c->sy != w->screen.sy)
-		window_resize(w, c->sx, c->sy);
-	draw_client(c, 0, c->sy - 1);
-}
-
-/* Draw window on client. */
-void
-draw_client(struct client *c, u_int py_upper, u_int py_lower)
-{
-	struct hdr	hdr;
-	size_t		size;
-
-	buffer_ensure(c->out, sizeof hdr);
-	buffer_add(c->out, sizeof hdr);
-	size = BUFFER_USED(c->out);
-
-	screen_draw(&c->session->window->screen, c->out, py_upper, py_lower);
-
-	size = BUFFER_USED(c->out) - size;
-	log_debug("redrawing screen, %zu bytes", size);
-	if (size != 0) {
-		hdr.type = MSG_OUTPUT;
-		hdr.size = size;
-		memcpy(
-		    BUFFER_IN(c->out) - size - sizeof hdr, &hdr, sizeof hdr);
-	} else
-		buffer_reverse_add(c->out, sizeof hdr);
-}
-
-/* Process a command from the client. */
-void
-process_client(struct client *c)
-{
-	struct hdr	hdr;
-
-	if (BUFFER_USED(c->in) < sizeof hdr)
-		return;
-	memcpy(&hdr, BUFFER_OUT(c->in), sizeof hdr);
-	if (BUFFER_USED(c->in) < (sizeof hdr) + hdr.size)
-		return;
-	buffer_remove(c->in, sizeof hdr);
-
-	switch (hdr.type) {
-	case MSG_NEW:
-		process_new_msg(c, &hdr);
-		break;
-	case MSG_ATTACH:
-		process_attach_msg(c, &hdr);
-		break;
-	case MSG_CREATE:
-		process_create_msg(c, &hdr);
-		break;
-	case MSG_NEXT:
-		process_next_msg(c, &hdr);
-		break;
-	case MSG_PREVIOUS:
-		process_previous_msg(c, &hdr);
-		break;
-	case MSG_SIZE:
-		process_size_msg(c, &hdr);
-		break;
-	case MSG_INPUT:
-		process_input_msg(c, &hdr);
-		break;
-	case MSG_REFRESH:
-		process_refresh_msg(c, &hdr);
-		break;
-	case MSG_SELECT:
-		process_select_msg(c, &hdr);
-		break;
-	case MSG_SESSIONS:
-		process_sessions_msg(c, &hdr);
-		break;
-	case MSG_WINDOWS:
-		process_windows_msg(c, &hdr);
-		break;
-	case MSG_RENAME:
-		process_rename_msg(c, &hdr);
-		break;
-	case MSG_LAST:
-		process_last_msg(c, &hdr);
-		break;
-	case MSG_WINDOWLIST:
-		process_windowlist_msg(c, &hdr);
-		break;
-	default:
-		fatalx("unexpected message");
-	}
-}
-
-/* New message from client. */
-void
-process_new_msg(struct client *c, struct hdr *hdr)
-{
-	struct new_data	 data;
-	const char      *shell;
-	char		*cmd, *msg;
-	
-	if (c->session != NULL)
-		return;
-	if (hdr->size != sizeof data)
-		fatalx("bad MSG_NEW size");
-	buffer_read(c->in, &data, hdr->size);
-
-	c->sx = data.sx;
-	if (c->sx == 0)
-		c->sx = 80;
-	c->sy = data.sy;
-	if (c->sy == 0)
-		c->sy = 25;
-
-	if (*data.name != '\0' && session_find(data.name) != NULL) {
-		xasprintf(&msg, "duplicate session: %s", data.name);
-		write_client(c, MSG_READY, msg, strlen(msg));
-		xfree(msg);
-		return;
-	}
-
-	shell = getenv("SHELL");
-	if (shell == NULL)
-		shell = "/bin/ksh";
-	xasprintf(&cmd, "%s -l", shell);
-	c->session = session_create(data.name, cmd, c->sx, c->sy);
-	if (c->session == NULL)
-		fatalx("session_create failed");
-	xfree(cmd);
-	
-	write_client(c, MSG_READY, NULL, 0);
-	draw_client(c, 0, c->sy - 1);
-}
-
-/* Attach message from client. */
-void
-process_attach_msg(struct client *c, struct hdr *hdr)
-{
-	struct attach_data	 data;
-	char			*msg;
-	
-	if (c->session != NULL)
-		return;
-	if (hdr->size != sizeof data)
-		fatalx("bad MSG_ATTACH size");
-	buffer_read(c->in, &data, hdr->size);
-
-	c->sx = data.sx;
-	if (c->sx == 0)
-		c->sx = 80;
-	c->sy = data.sy;
-	if (c->sy == 0)
-		c->sy = 25;
-
-	if (*data.name != '\0')
-		c->session = session_find(data.name);
-	if (c->session == NULL) {
-		xasprintf(&msg, "session not found: %s", data.name);
-		write_client(c, MSG_READY, msg, strlen(msg));
-		xfree(msg);
-		return;
-	}
-
-	write_client(c, MSG_READY, NULL, 0);
-	draw_client(c, 0, c->sy - 1);
-}
-
-/* Create message from client. */
-void
-process_create_msg(struct client *c, struct hdr *hdr)
-{
-	const char	*shell;
-	char		*cmd;
-
-	if (c->session == NULL)
-		return;
-	if (hdr->size != 0)
-		fatalx("bad MSG_CREATE size");
-
-	shell = getenv("SHELL");
-	if (shell == NULL)
-		shell = "/bin/ksh";
-	xasprintf(&cmd, "%s -l", shell);
-	if (session_new(c->session, cmd, c->sx, c->sy) != 0)
-		fatalx("session_new failed");
-	xfree(cmd);
-
-	draw_client(c, 0, c->sy - 1);
-}
-
-/*