Adding upstream version 3.3a.upstream/3.3aupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 230 insertions, 0 deletions

diff --git a/cmd-pipe-pane.c b/cmd-pipe-pane.c
new file mode 100644
index 0000000..0fa656c
--- /dev/null
+++ b/cmd-pipe-pane.c
@@ -0,0 +1,230 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * 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/socket.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+/*
+ * Open pipe to redirect pane output. If already open, close first.
+ */
+
+static enum cmd_retval	cmd_pipe_pane_exec(struct cmd *, struct cmdq_item *);
+
+static void cmd_pipe_pane_read_callback(struct bufferevent *, void *);
+static void cmd_pipe_pane_write_callback(struct bufferevent *, void *);
+static void cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
+
+const struct cmd_entry cmd_pipe_pane_entry = {
+	.name = "pipe-pane",
+	.alias = "pipep",
+
+	.args = { "IOot:", 0, 1, NULL },
+	.usage = "[-IOo] " CMD_TARGET_PANE_USAGE " [shell-command]",
+
+	.target = { 't', CMD_FIND_PANE, 0 },
+
+	.flags = CMD_AFTERHOOK,
+	.exec = cmd_pipe_pane_exec
+};
+
+static enum cmd_retval
+cmd_pipe_pane_exec(struct cmd *self, struct cmdq_item *item)
+{
+	struct args			*args = cmd_get_args(self);
+	struct cmd_find_state		*target = cmdq_get_target(item);
+	struct client			*tc = cmdq_get_target_client(item);
+	struct window_pane		*wp = target->wp;
+	struct session			*s = target->s;
+	struct winlink			*wl = target->wl;
+	struct window_pane_offset	*wpo = &wp->pipe_offset;
+	char				*cmd;
+	int				 old_fd, pipe_fd[2], null_fd, in, out;
+	struct format_tree		*ft;
+	sigset_t			 set, oldset;
+
+	/* Do nothing if pane is dead. */
+	if (wp->fd == -1 || (wp->flags & PANE_EXITED)) {
+		cmdq_error(item, "target pane has exited");
+		return (CMD_RETURN_ERROR);
+	}
+
+	/* Destroy the old pipe. */
+	old_fd = wp->pipe_fd;
+	if (wp->pipe_fd != -1) {
+		bufferevent_free(wp->pipe_event);
+		close(wp->pipe_fd);
+		wp->pipe_fd = -1;
+
+		if (window_pane_destroy_ready(wp)) {
+			server_destroy_pane(wp, 1);
+			return (CMD_RETURN_NORMAL);
+		}
+	}
+
+	/* If no pipe command, that is enough. */
+	if (args_count(args) == 0 || *args_string(args, 0) == '\0')
+		return (CMD_RETURN_NORMAL);
+
+	/*
+	 * With -o, only open the new pipe if there was no previous one. This
+	 * allows a pipe to be toggled with a single key, for example:
+	 *
+	 *	bind ^p pipep -o 'cat >>~/output'
+	 */
+	if (args_has(args, 'o') && old_fd != -1)
+		return (CMD_RETURN_NORMAL);
+
+	/* What do we want to do? Neither -I or -O is -O. */
+	if (args_has(args, 'I')) {
+		in = 1;
+		out = args_has(args, 'O');
+	} else {
+		in = 0;
+		out = 1;
+	}
+
+	/* Open the new pipe. */
+	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_fd) != 0) {
+		cmdq_error(item, "socketpair error: %s", strerror(errno));
+		return (CMD_RETURN_ERROR);
+	}
+
+	/* Expand the command. */
+	ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
+	format_defaults(ft, tc, s, wl, wp);
+	cmd = format_expand_time(ft, args_string(args, 0));
+	format_free(ft);
+
+	/* Fork the child. */
+	sigfillset(&set);
+	sigprocmask(SIG_BLOCK, &set, &oldset);
+	switch (fork()) {
+	case -1:
+		sigprocmask(SIG_SETMASK, &oldset, NULL);
+		cmdq_error(item, "fork error: %s", strerror(errno));
+
+		free(cmd);
+		return (CMD_RETURN_ERROR);
+	case 0:
+		/* Child process. */
+		proc_clear_signals(server_proc, 1);
+		sigprocmask(SIG_SETMASK, &oldset, NULL);
+		close(pipe_fd[0]);
+
+		null_fd = open(_PATH_DEVNULL, O_WRONLY);
+		if (out) {
+			if (dup2(pipe_fd[1], STDIN_FILENO) == -1)
+				_exit(1);
+		} else {
+			if (dup2(null_fd, STDIN_FILENO) == -1)
+				_exit(1);
+		}
+		if (in) {
+			if (dup2(pipe_fd[1], STDOUT_FILENO) == -1)
+				_exit(1);
+			if (pipe_fd[1] != STDOUT_FILENO)
+				close(pipe_fd[1]);
+		} else {
+			if (dup2(null_fd, STDOUT_FILENO) == -1)
+				_exit(1);
+		}
+		if (dup2(null_fd, STDERR_FILENO) == -1)
+			_exit(1);
+		closefrom(STDERR_FILENO + 1);
+
+		execl(_PATH_BSHELL, "sh", "-c", cmd, (char *) NULL);
+		_exit(1);
+	default:
+		/* Parent process. */
+		sigprocmask(SIG_SETMASK, &oldset, NULL);
+		close(pipe_fd[1]);
+
+		wp->pipe_fd = pipe_fd[0];
+		memcpy(wpo, &wp->offset, sizeof *wpo);
+
+		setblocking(wp->pipe_fd, 0);
+		wp->pipe_event = bufferevent_new(wp->pipe_fd,
+		    cmd_pipe_pane_read_callback,
+		    cmd_pipe_pane_write_callback,
+		    cmd_pipe_pane_error_callback,
+		    wp);
+		if (wp->pipe_event == NULL)
+			fatalx("out of memory");
+		if (out)
+			bufferevent_enable(wp->pipe_event, EV_WRITE);
+		if (in)
+			bufferevent_enable(wp->pipe_event, EV_READ);
+
+		free(cmd);
+		return (CMD_RETURN_NORMAL);
+	}
+}
+
+static void
+cmd_pipe_pane_read_callback(__unused struct bufferevent *bufev, void *data)
+{
+	struct window_pane	*wp = data;
+	struct evbuffer		*evb = wp->pipe_event->input;
+	size_t			 available;
+
+	available = EVBUFFER_LENGTH(evb);
+	log_debug("%%%u pipe read %zu", wp->id, available);
+
+	bufferevent_write(wp->event, EVBUFFER_DATA(evb), available);
+	evbuffer_drain(evb, available);
+
+	if (window_pane_destroy_ready(wp))
+		server_destroy_pane(wp, 1);
+}
+
+static void
+cmd_pipe_pane_write_callback(__unused struct bufferevent *bufev, void *data)
+{
+	struct window_pane	*wp = data;
+
+	log_debug("%%%u pipe empty", wp->id);
+
+	if (window_pane_destroy_ready(wp))
+		server_destroy_pane(wp, 1);
+}
+
+static void
+cmd_pipe_pane_error_callback(__unused struct bufferevent *bufev,
+    __unused short what, void *data)
+{
+	struct window_pane	*wp = data;
+
+	log_debug("%%%u pipe error", wp->id);
+
+	bufferevent_free(wp->pipe_event);
+	close(wp->pipe_fd);
+	wp->pipe_fd = -1;
+
+	if (window_pane_destroy_ready(wp))
+		server_destroy_pane(wp, 1);
+}