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

cmd-switch-client.c

@@ -0,0 +1,161 @@
+/* $OpenBSD$ */
+
+/*
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Switch client to a different session.
+ */
+
+int	cmd_switch_client_parse(struct cmd *, int, char **, char **);
+int	cmd_switch_client_exec(struct cmd *, struct cmd_ctx *);
+void	cmd_switch_client_send(struct cmd *, struct buffer *);
+void	cmd_switch_client_recv(struct cmd *, struct buffer *);
+void	cmd_switch_client_free(struct cmd *);
+size_t	cmd_switch_client_print(struct cmd *, char *, size_t);
+
+struct cmd_switch_client_data {
+	char	*name;
+	char	*target;
+};
+
+const struct cmd_entry cmd_switch_client_entry = {
+	"switch-client", "switchc",
+	"[-c target-client] [-t target-session]",
+	0,
+	NULL,
+	cmd_switch_client_parse,
+	cmd_switch_client_exec,
+	cmd_switch_client_send,
+	cmd_switch_client_recv,
+	cmd_switch_client_free,
+	cmd_switch_client_print
+};
+
+int
+cmd_switch_client_parse(struct cmd *self, int argc, char **argv, char **cause)
+{
+	struct cmd_switch_client_data	*data;
+	int				 opt;
+
+	self->data = data = xmalloc(sizeof *data);
+	data->name = NULL;
+	data->target = NULL;
+
+	while ((opt = getopt(argc, argv, "c:t:")) != -1) {
+		switch (opt) {
+		case 'c':
+			data->name = xstrdup(optarg);
+			break;
+		case 't':
+			data->target = xstrdup(optarg);
+			break;
+		default:
+			goto usage;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	if (argc != 0)
+		goto usage;
+
+	return (0);
+
+usage:
+	xasprintf(cause, "usage: %s %s", self->entry->name, self->entry->usage);
+
+	self->entry->free(self);
+	return (-1);
+}
+
+int
+cmd_switch_client_exec(struct cmd *self, struct cmd_ctx *ctx)
+{
+	struct cmd_switch_client_data	*data = self->data;
+	struct client			*c;
+	struct session			*s;
+
+	if (data == NULL)
+		return (0);
+
+	if ((c = cmd_find_client(ctx, data->name)) == NULL)
+		return (-1);
+	if ((s = cmd_find_session(ctx, data->target)) == NULL)
+		return (-1);
+
+	c->session = s;
+
+	recalculate_sizes();
+	server_redraw_client(c);
+
+	return (0);
+}
+
+void
+cmd_switch_client_send(struct cmd *self, struct buffer *b)
+{
+	struct cmd_switch_client_data	*data = self->data;
+
+	buffer_write(b, data, sizeof *data);
+	cmd_send_string(b, data->name);
+	cmd_send_string(b, data->target);
+}
+
+void
+cmd_switch_client_recv(struct cmd *self, struct buffer *b)
+{
+	struct cmd_switch_client_data	*data;
+
+	self->data = data = xmalloc(sizeof *data);
+	buffer_read(b, data, sizeof *data);
+	data->name = cmd_recv_string(b);
+	data->target = cmd_recv_string(b);
+}
+
+void
+cmd_switch_client_free(struct cmd *self)
+{
+	struct cmd_switch_client_data	*data = self->data;
+
+	if (data->name != NULL)
+		xfree(data->name);
+	if (data->target != NULL)
+		xfree(data->target);
+	xfree(data);
+}
+
+size_t
+cmd_switch_client_print(struct cmd *self, char *buf, size_t len)
+{
+	struct cmd_switch_client_data	*data = self->data;
+	size_t				 off = 0;
+
+	off += xsnprintf(buf, len, "%s", self->entry->name);
+	if (data == NULL)
+		return (off);
+	if (off < len && data->name != NULL)
+		off += cmd_prarg(buf + off, len - off, " -c ", data->name);
+	if (off < len && data->target != NULL)
+		off += cmd_prarg(buf + off, len - off, " -t ", data->target);
+	return (off);
+}