Switch window pane pipe redirect fd over to a bufferevent.

cmd-pipe-pane.c

@@ -17,6 +17,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/socket.h>
 
 #include <errno.h>
 #include <fcntl.h>
@@ -32,6 +33,8 @@
 
 int	cmd_pipe_pane_exec(struct cmd *, struct cmd_ctx *);
 
+void	cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
+
 const struct cmd_entry cmd_pipe_pane_entry = {
 	"pipe-pane", "pipep",
 	CMD_TARGET_PANE_USAGE "[-o] [command]",
@@ -56,7 +59,7 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 	/* Destroy the old pipe. */
 	old_fd = wp->pipe_fd;
 	if (wp->pipe_fd != -1) {
-		buffer_destroy(wp->pipe_buf);
+		bufferevent_free(wp->pipe_event);
 		close(wp->pipe_fd);
 		wp->pipe_fd = -1;
 	}
@@ -75,8 +78,8 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (0);
 
 	/* Open the new pipe. */
-	if (pipe(pipe_fd) != 0) {
-		ctx->error(ctx, "pipe error: %s", strerror(errno));
+	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_fd) != 0) {
+		ctx->error(ctx, "socketpair error: %s", strerror(errno));
 		return (-1);
 	}
 
@@ -110,9 +113,12 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		close(pipe_fd[1]);
 
 		wp->pipe_fd = pipe_fd[0];
-		wp->pipe_buf = buffer_create(BUFSIZ);
 		wp->pipe_off = BUFFER_USED(wp->in);
 		
+		wp->pipe_event = bufferevent_new(wp->pipe_fd,
+		    NULL, NULL, cmd_pipe_pane_error_callback, wp);
+		bufferevent_enable(wp->pipe_event, EV_WRITE);
+		
 		if ((mode = fcntl(wp->pipe_fd, F_GETFL)) == -1)
 			fatal("fcntl failed");
 		if (fcntl(wp->pipe_fd, F_SETFL, mode|O_NONBLOCK) == -1)
@@ -124,3 +130,14 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 
 	return (0);
 }
+
+void
+cmd_pipe_pane_error_callback(
+    unused struct bufferevent *bufev, unused short what, void *data)
+{
+	struct window_pane	*wp = data;
+
+	bufferevent_free(wp->pipe_event);
+	close(wp->pipe_fd);
+	wp->pipe_fd = -1;
+}

server-window.c

@@ -55,16 +55,6 @@ server_window_prepare(void)
 			event_set(&wp->event,
 			    wp->fd, events, server_window_callback, wp);
 			event_add(&wp->event, NULL);
-
-			if (wp->pipe_fd == -1)
-				continue;
-			events = 0;
-			if (BUFFER_USED(wp->pipe_buf) > 0)
-				events |= EV_WRITE;
-			event_del(&wp->pipe_event);
-			event_set(&wp->pipe_event,
-			    wp->pipe_fd, events, server_window_callback, wp);
-			event_add(&wp->pipe_event, NULL);
 		}
 	}
 }
@@ -110,14 +100,6 @@ server_window_callback(int fd, short events, void *data)
 		} else
 			window_pane_parse(wp);
 	}
-
-	if (fd == wp->pipe_fd) {
-		if (buffer_poll(fd, events, NULL, wp->pipe_buf) != 0) {
-			buffer_destroy(wp->pipe_buf);
-			close(wp->pipe_fd);
-			wp->pipe_fd = -1;
-		}
-	}
 }
 
 /* Window functions that need to happen every loop. */

tmux.h

@@ -805,8 +805,7 @@ struct window_pane {
 	struct input_ctx ictx;
 
 	int		 pipe_fd;
-	struct event	 pipe_event;
-	struct buffer	*pipe_buf;
+	struct bufferevent *pipe_event;
 	size_t		 pipe_off;
 
 	struct screen	*screen;

window.c

@@ -426,8 +426,8 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
 	wp->sy = sy;
 
 	wp->pipe_fd = -1;
-	wp->pipe_buf = NULL;
 	wp->pipe_off = 0;
+	wp->pipe_event = NULL;
 
 	wp->saved_grid = NULL;
 
@@ -453,9 +453,8 @@ window_pane_destroy(struct window_pane *wp)
 		grid_destroy(wp->saved_grid);
 
 	if (wp->pipe_fd != -1) {
-		buffer_destroy(wp->pipe_buf);
 		close(wp->pipe_fd);
-		event_del(&wp->pipe_event);
+		bufferevent_free(wp->pipe_event);
 	}
 
 	buffer_destroy(wp->in);
@@ -639,7 +638,7 @@ window_pane_parse(struct window_pane *wp)
 
 	new_size = BUFFER_USED(wp->in) - wp->pipe_off;
 	if (wp->pipe_fd != -1 && new_size > 0)
-		buffer_write(wp->pipe_buf, BUFFER_OUT(wp->in), new_size);
+		bufferevent_write(wp->pipe_event, BUFFER_OUT(wp->in), new_size);
 	
 	input_parse(wp);