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

1 files changed, 159 insertions, 0 deletions

diff --git a/client-msg.c b/client-msg.c
new file mode 100644
index 00000000..fd48d403
--- /dev/null
+++ b/client-msg.c
@@ -0,0 +1,159 @@
+/* $OpenBSD$ */
+
+/*
+ * 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 <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+int	client_msg_fn_detach(struct hdr *, struct client_ctx *, char **);
+int	client_msg_fn_error(struct hdr *, struct client_ctx *, char **);
+int	client_msg_fn_shutdown(struct hdr *, struct client_ctx *, char **);
+int	client_msg_fn_exit(struct hdr *, struct client_ctx *, char **);
+int	client_msg_fn_exited(struct hdr *, struct client_ctx *, char **);
+int	client_msg_fn_suspend(struct hdr *, struct client_ctx *, char **);
+
+struct client_msg {
+	enum hdrtype   type;
+	int	       (*fn)(struct hdr *, struct client_ctx *, char **);
+};
+struct client_msg client_msg_table[] = {
+	{ MSG_DETACH, client_msg_fn_detach },
+	{ MSG_ERROR, client_msg_fn_error },
+	{ MSG_EXIT, client_msg_fn_exit },
+	{ MSG_EXITED, client_msg_fn_exited },
+	{ MSG_SHUTDOWN, client_msg_fn_shutdown },
+	{ MSG_SUSPEND, client_msg_fn_suspend },
+};
+
+int
+client_msg_dispatch(struct client_ctx *cctx, char **error)
+{
+	struct hdr		 hdr;
+	struct client_msg	*msg;
+	u_int		 	 i;
+
+	if (BUFFER_USED(cctx->srv_in) < sizeof hdr)
+		return (1);
+	memcpy(&hdr, BUFFER_OUT(cctx->srv_in), sizeof hdr);
+	if (BUFFER_USED(cctx->srv_in) < (sizeof hdr) + hdr.size)
+		return (1);
+	buffer_remove(cctx->srv_in, sizeof hdr);
+
+	for (i = 0; i < nitems(client_msg_table); i++) {
+		msg = client_msg_table + i;
+		if (msg->type == hdr.type) {
+			if (msg->fn(&hdr, cctx, error) != 0)
+				return (-1);
+			return (0);
+		}
+	}
+	fatalx("unexpected message");
+}
+
+int
+client_msg_fn_error(struct hdr *hdr, struct client_ctx *cctx, char **error)
+{
+	if (hdr->size > SIZE_MAX - 1)
+		fatalx("bad MSG_ERROR size");
+
+	*error = xmalloc(hdr->size + 1);
+	buffer_read(cctx->srv_in, *error, hdr->size);
+	(*error)[hdr->size] = '\0';
+
+	return (-1);
+}
+
+int
+client_msg_fn_detach(
+    struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
+{
+	if (hdr->size != 0)
+		fatalx("bad MSG_DETACH size");
+
+	client_write_server(cctx, MSG_EXITING, NULL, 0);
+	cctx->flags |= CCTX_DETACH;
+
+	return (0);
+}
+
+int
+client_msg_fn_shutdown(
+    struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
+{
+	if (hdr->size != 0)
+		fatalx("bad MSG_SHUTDOWN size");
+
+	client_write_server(cctx, MSG_EXITING, NULL, 0);
+	cctx->flags |= CCTX_SHUTDOWN;
+
+	return (0);
+}
+
+int
+client_msg_fn_exit(
+    struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
+{
+	if (hdr->size != 0)
+		fatalx("bad MSG_EXIT size");
+
+	client_write_server(cctx, MSG_EXITING, NULL, 0);
+	cctx->flags |= CCTX_EXIT;
+
+	return (0);
+}
+
+int
+client_msg_fn_exited(
+    struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
+{
+	if (hdr->size != 0)
+		fatalx("bad MSG_EXITED size");
+
+	return (-1);
+}
+
+int
+client_msg_fn_suspend(
+    struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
+{
+	struct sigaction	 act;
+
+	if (hdr->size != 0)
+		fatalx("bad MSG_SUSPEND size");
+
+	memset(&act, 0, sizeof act);
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = SA_RESTART;
+
+	act.sa_handler = SIG_DFL;
+	if (sigaction(SIGTSTP, &act, NULL) != 0)
+		fatal("sigaction failed");
+
+	act.sa_handler = sighandler;
+	if (sigaction(SIGCONT, &act, NULL) != 0)
+		fatal("sigaction failed");
+
+	kill(getpid(), SIGTSTP);
+
+	return (0);
+}