Import tmux, a terminal multiplexor allowing (among other things) a single

terminal to be switched between several different windows and programs
displayed on one terminal be detached from one terminal and moved to another.

ok deraadt pirofti

server-fn.c

@@ -0,0 +1,242 @@
+/* $OpenBSD$ */
+
+/*
+ * 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/time.h>
+
+#include <string.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+int	server_lock_callback(void *, const char *);
+
+const char **
+server_fill_environ(struct session *s)
+{
+	static const char *env[] = { NULL /* TMUX= */, "TERM=screen", NULL };
+	static char	tmuxvar[MAXPATHLEN + 256];
+	u_int		idx;
+
+	if (session_index(s, &idx) != 0)
+		fatalx("session not found");
+
+	xsnprintf(tmuxvar, sizeof tmuxvar,
+	    "TMUX=%s,%ld,%u", socket_path, (long) getpid(), idx);
+	env[0] = tmuxvar;
+
+	return (env);
+}
+
+void
+server_write_client(
+    struct client *c, enum hdrtype type, const void *buf, size_t len)
+{
+	struct hdr	 hdr;
+
+	log_debug("writing %d to client %d", type, c->fd);
+
+	hdr.type = type;
+	hdr.size = len;
+
+	buffer_write(c->out, &hdr, sizeof hdr);
+	if (buf != NULL && len > 0)
+		buffer_write(c->out, buf, len);
+}
+
+void
+server_write_session(
+    struct session *s, enum hdrtype type, const void *buf, size_t len)
+{
+	struct client	*c;
+	u_int		 i;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+		if (c->session == s)
+			server_write_client(c, type, buf, len);
+	}
+}
+
+void
+server_write_window(
+    struct window *w, enum hdrtype type, const void *buf, size_t len)
+{
+	struct client	*c;
+	u_int		 i;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+		if (c->session->curw->window == w)
+			server_write_client(c, type, buf, len);
+	}
+}
+
+void
+server_redraw_client(struct client *c)
+{
+	c->flags |= CLIENT_REDRAW;
+}
+
+void
+server_status_client(struct client *c)
+{
+	c->flags |= CLIENT_STATUS;
+}
+
+void
+server_redraw_session(struct session *s)
+{
+	struct client	*c;
+	u_int		 i;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+		if (c->session == s)
+			server_redraw_client(c);
+	}
+}
+
+void
+server_status_session(struct session *s)
+{
+	struct client	*c;
+	u_int		 i;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+		if (c->session == s)
+			server_status_client(c);
+	}
+}
+
+void
+server_redraw_window(struct window *w)
+{
+	struct client	*c;
+	u_int		 i;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+		if (c->session->curw->window == w)
+			server_redraw_client(c);
+	}
+	w->flags |= WINDOW_REDRAW;
+}
+
+void
+server_status_window(struct window *w)
+{
+	struct session	*s;
+	u_int		 i;
+
+	/*
+	 * This is slightly different. We want to redraw the status line of any
+	 * clients containing this window rather than any where it is the
+	 * current window.
+	 */
+
+	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
+		s = ARRAY_ITEM(&sessions, i);
+		if (s != NULL && session_has(s, w))
+			server_status_session(s);
+	}
+}
+
+void
+server_lock(void)
+{
+	struct client	*c;
+	u_int		 i;
+
+	if (server_locked)
+		return;
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL || c->session == NULL)
+			continue;
+
+		status_prompt_clear(c);
+		status_prompt_set(
+		    c, "Password: ", server_lock_callback, c, PROMPT_HIDDEN);
+  		server_redraw_client(c);
+	}
+	server_locked = 1;
+}
+
+int
+server_lock_callback(unused void *data, const char *s)
+{
+	return (server_unlock(s));
+}
+
+int
+server_unlock(const char *s)
+{
+	struct client	*c;
+	u_int		 i;
+	char		*out;
+
+	if (!server_locked)
+		return (0);
+	server_activity = time(NULL);
+
+	if (server_password != NULL) {
+		if (s == NULL)
+			return (-1);
+		out = crypt(s, server_password);
+		if (strcmp(out, server_password) != 0)
+			goto wrong;
+	}
+
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL)
+			continue;
+
+		status_prompt_clear(c);
+  		server_redraw_client(c);
+	}
+
+	server_locked = 0;
+	return (0);
+
+wrong:
+	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
+		c = ARRAY_ITEM(&clients, i);
+		if (c == NULL)
+			continue;
+
+		*c->prompt_buffer = '\0';
+		c->prompt_index = 0;
+  		server_status_client(c);
+	}
+
+	return (-1);
+}