Initial import to CVS. Basic functions are working, albeit with a couple of showstopper memory bugs and many missing features. Detaching, reattaching, creating new sessions, listing sessions work acceptably for using with shells. Simple curses programs (top, systat, tetris) and more complicated ones (mutt, emacs) that don't require scrolling regions (ESC[r) mostly work fine (including mutt, emacs). No status bar yet and no key remapping or other customisation.

1 files changed, 317 insertions, 0 deletions

diff --git a/window.c b/window.c
new file mode 100644
index 00000000..47d9e08d
--- /dev/null
+++ b/window.c
@@ -0,0 +1,317 @@
+/* $Id: window.c,v 1.1.1.1 2007-07-09 19:04:12 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 <sys/ioctl.h>
+
+#include <fcntl.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#define TTYDEFCHARS
+#include <termios.h>
+#include <unistd.h>
+#include <util.h>
+
+#include "tmux.h"
+
+/*
+ * Each window is attached to a pty. This file contains code to handle them.
+ *
+ * A window has two buffers attached, these are filled and emptied by the main
+ * server poll loop. Output data is received from pty's in ANSI format,
+ * translated and returned as a series of ANSI escape sequences and strings.
+ * Input data is received in ANSI format and written directly to the pty.
+ *
+ * Each window also has a "virtual" screen (screen.c) which contains the
+ * current state and is redisplayed when the window is reattached to a client.
+ *
+ * A global list of windows is maintained, and a window may also be a member
+ * of any number of sessions. A reference count is maintained and a window
+ * removed from the global list and destroyed when it reaches zero.
+ */
+
+/* Global window list. */
+struct windows	windows;
+
+/* Create a new window. */
+struct window *
+window_create(const char *cmd, u_int sx, u_int sy)
+{
+	struct window	*w;
+	struct winsize	 ws;
+	struct termios	 tio;
+	int		 fd, mode;
+	char		 pid[16], *ptr, *name;
+
+	memset(&ws, 0, sizeof ws);
+	ws.ws_col = sx;
+	ws.ws_row = sy;
+
+	memset(&tio, 0, sizeof tio);
+	tio.c_iflag = TTYDEF_IFLAG;
+	tio.c_oflag = TTYDEF_OFLAG;
+	tio.c_lflag = TTYDEF_LFLAG;
+	tio.c_cflag = TTYDEF_CFLAG;
+	memcpy(&tio.c_cc, ttydefchars, sizeof tio.c_cc);
+	cfsetspeed(&tio, TTYDEF_SPEED);
+
+	xsnprintf(pid, sizeof pid, "%ld", (long) getpid());
+	switch (forkpty(&fd, NULL, &tio, &ws)) {
+	case -1:
+		return (NULL);
+	case 0:
+		if (setenv("TMUX", pid, 1) != 0)
+			log_fatal("setenv");
+		if (setenv("TERM", "screen", 1) != 0)
+			log_fatal("setenv");
+		log_close();
+
+		execl(_PATH_BSHELL, "sh", "-c", cmd, (char *) NULL);
+		log_fatal("execl");
+	}
+
+	if ((mode = fcntl(fd, F_GETFL)) == -1)
+		log_fatal("fcntl");
+	if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
+		log_fatal("fcntl");
+
+	mode = 1;
+	if (ioctl(fd, TIOCPKT, &mode) == -1)
+		log_fatal("ioctl(TIOCPKT)");
+
+	w = xmalloc(sizeof *w);
+	w->fd = fd;
+	w->in = buffer_create(BUFSIZ);
+	w->out = buffer_create(BUFSIZ);
+	screen_create(&w->screen, sx, sy);
+
+	name = xstrdup(cmd);
+	if ((ptr = strchr(name, ' ')) != NULL) {
+		if (ptr != name && ptr[-1] != '\\')
+			*ptr = '\0';
+		else {
+			while ((ptr = strchr(ptr + 1, ' ')) != NULL) {
+				if (ptr[-1] != '\\') {
+					*ptr = '\0';
+					break;
+				}
+			}
+		}
+	}
+	strlcpy(w->name, xbasename(name), sizeof w->name);
+	xfree(name);
+
+	window_add(&windows, w);
+	w->references = 0;
+
+	return (w);
+}
+
+/* Find window index in list. */
+int
+window_index(struct windows *ww, struct window *w, u_int *i)
+{
+	for (*i = 0; *i < ARRAY_LENGTH(ww); (*i)++) {
+		if (w == ARRAY_ITEM(ww, *i))
+			return (0);
+	}
+	return (-1);
+}
+	
+/* Add a window to a list. */
+void
+window_add(struct windows *ww, struct window *w)
+{
+	u_int	i;
+
+	if (window_index(ww, NULL, &i) != 0)
+		ARRAY_ADD(ww, w);
+	else
+		ARRAY_SET(ww, i, w);
+
+	w->references++;
+}
+
+/* Remove a window from a list. */
+void
+window_remove(struct windows *ww, struct window *w)
+{
+	u_int	i;
+
+	if (window_index(ww, w, &i) != 0)
+		log_fatalx("window_remove: window not found");
+	ARRAY_REMOVE(ww, i);
+
+	w->references--;
+	if (w->references == 0) {
+		window_destroy(w);
+		window_remove(&windows, w);
+	}
+}
+
+/* Destroy a window. */
+void
+window_destroy(struct window *w)
+{
+	close(w->fd);
+
+	buffer_destroy(w->in);
+	buffer_destroy(w->out);
+	xfree(w);
+}
+
+/* Locate next window in list. */
+struct window *
+window_next(struct windows *ww, struct window *w)
+{
+	u_int	i;
+
+	if (window_index(ww, w, &i) != 0)
+		log_fatalx("window_next: window not found");
+
+	if (i == ARRAY_LENGTH(ww) - 1)
+		return (NULL);
+	do {
+		i++;
+		w = window_at(ww, i);
+		if (w != NULL)
+			return (w);
+	} while (i != ARRAY_LENGTH(ww) - 1);
+	return (NULL);
+} 
+
+/* Locate previous window in list. */
+struct window *
+window_previous(struct windows *ww, struct window *w)
+{
+	u_int	i;
+
+	if (window_index(ww, w, &i) != 0)
+		log_fatalx("window_previous: window not found");
+	if (i == 0)
+		return (NULL);
+	do {
+		i--;
+		w = window_at(ww, i);
+		if (w != NULL)
+			return (w);
+	} while (i != 0);
+	return (NULL);
+}
+
+/* Locate window at specific position in list. */
+struct window *
+window_at(struct windows *ww, u_int i)
+{
+	if (i >= ARRAY_LENGTH(ww))
+		return (NULL);
+	return (ARRAY_ITEM(ww, i));
+} 
+
+/* Resize a window. */
+int
+window_resize(struct window *w, u_int sx, u_int sy)
+{
+	struct winsize	ws;
+
+	if (sx == w->screen.sx && sy == w->screen.sy)
+		return (-1);
+		
+	memset(&ws, 0, sizeof ws);
+	ws.ws_col = sx;
+	ws.ws_row = sy;
+
+	screen_resize(&w->screen, sx, sy);
+
+	if (ioctl(w->fd, TIOCSWINSZ, &ws) == -1)
+		log_fatal("ioctl(TIOCSWINSZ)");
+	return (0);
+}
+
+/* Handle window poll results. This is special because of TIOCPKT. */
+int
+window_poll(struct window *w, struct pollfd *pfd)
+{
+	struct termios	 tio;
+	size_t	 	 size;
+	u_char		*ptr;
+
+	size = BUFFER_USED(w->in);
+	if (buffer_poll(pfd, w->in, w->out) != 0)
+		return (-1);
+
+	if (BUFFER_USED(w->in) == size)
+		return (0);
+	ptr = BUFFER_IN(w->in) - (BUFFER_USED(w->in) - size);
+
+	log_debug("window packet: %hhu", *ptr);
+	switch (*ptr) {
+	case TIOCPKT_DATA:
+	case TIOCPKT_FLUSHREAD:
+	case TIOCPKT_FLUSHWRITE:
+	case TIOCPKT_STOP:
+	case TIOCPKT_START:
+	case TIOCPKT_DOSTOP:
+	case TIOCPKT_NOSTOP:
+		buffer_delete_range(w->in, size, 1);
+		break;
+	case TIOCPKT_IOCTL:
+		buffer_delete_range(w->in, size, 1 + sizeof tio);
+		break;
+	}
+
+	return (0);
+}
+
+/* Process window input. */
+void
+window_input(struct window *w, struct buffer *b, size_t size)
+{
+	int	key;
+
+	while (size != 0) {
+		if (size < 1)
+			break;
+		size--;
+		key = input_extract8(b);
+		if (key == '\e') {
+			if (size < 2)
+				log_fatalx("window_input: underflow");
+			size -= 2;
+			key = (int16_t) input_extract16(b);
+		}
+		input_key(w->out, key);
+	}
+}
+
+/*
+ * Process window output. Output is translated into a series of ANSI escape
+ * sequences and strings and returned.
+ */
+void
+window_output(struct window *w, struct buffer *b)
+{
+	size_t	used;
+
+	used = input_parse(
+	    BUFFER_OUT(w->in), BUFFER_USED(w->in), b, &w->screen);
+	if (used != 0)
+		buffer_remove(w->in, used);
+}