diff --git a/arguments.c b/arguments.c
index e2d18980..e9af70ac 100644
--- a/arguments.c
+++ b/arguments.c
@@ -343,3 +343,53 @@ args_strtonum(struct args *args, u_char ch, long long minval, long long maxval,
 	*cause = NULL;
 	return (ll);
 }
+
+/* Convert an argument to a number which may be a percentage. */
+long long
+args_percentage(struct args *args, u_char ch, long long minval,
+    long long maxval, long long curval, char **cause)
+{
+	const char		*errstr;
+	long long 	 	 ll;
+	struct args_entry	*entry;
+	struct args_value	*value;
+	size_t			 valuelen;
+	char			*copy;
+
+	if ((entry = args_find(args, ch)) == NULL) {
+		*cause = xstrdup("missing");
+		return (0);
+	}
+	value = TAILQ_LAST(&entry->values, args_values);
+	valuelen = strlen(value->value);
+
+	if (value->value[valuelen - 1] == '%') {
+		copy = xstrdup(value->value);
+		copy[valuelen - 1] = '\0';
+
+		ll = strtonum(copy, 0, 100, &errstr);
+		free(copy);
+		if (errstr != NULL) {
+			*cause = xstrdup(errstr);
+			return (0);
+		}
+		ll = (curval * ll) / 100;
+		if (ll < minval) {
+			*cause = xstrdup("too large");
+			return (0);
+		}
+		if (ll > maxval) {
+			*cause = xstrdup("too small");
+			return (0);
+		}
+	} else {
+		ll = strtonum(value->value, minval, maxval, &errstr);
+		if (errstr != NULL) {
+			*cause = xstrdup(errstr);
+			return (0);
+		}
+	}
+
+	*cause = NULL;
+	return (ll);
+}
diff --git a/cmd-join-pane.c b/cmd-join-pane.c
index 4b767e3e..788f003a 100644
--- a/cmd-join-pane.c
+++ b/cmd-join-pane.c
@@ -50,7 +50,7 @@ const struct cmd_entry cmd_move_pane_entry = {
 	.alias = "movep",
 
 	.args = { "bdhvp:l:s:t:", 0, 0 },
-	.usage = "[-bdhv] [-p percentage|-l size] " CMD_SRCDST_PANE_USAGE,
+	.usage = "[-bdhv] [-l size] " CMD_SRCDST_PANE_USAGE,
 
 	.source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -68,9 +68,7 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct winlink		*src_wl, *dst_wl;
 	struct window		*src_w, *dst_w;
 	struct window_pane	*src_wp, *dst_wp;
-	char			*cause, *copy;
-	const char		*errstr, *p;
-	size_t			 plen;
+	char			*cause = NULL;
 	int			 size, percentage, dst_idx, not_same_window;
 	int			 flags;
 	enum layout_type	 type;
@@ -107,40 +105,27 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 		type = LAYOUT_LEFTRIGHT;
 
 	size = -1;
-	if ((p = args_get(args, 'l')) != NULL) {
-		plen = strlen(p);
-		if (p[plen - 1] == '%') {
-			copy = xstrdup(p);
-			copy[plen - 1] = '\0';
-			percentage = strtonum(copy, 0, INT_MAX, &errstr);
-			free(copy);
-			if (errstr != NULL) {
-				cmdq_error(item, "percentage %s", errstr);
-				return (CMD_RETURN_ERROR);
-			}
+	if (args_has(args, 'l')) {
+		if (type == LAYOUT_TOPBOTTOM) {
+			size = args_percentage(args, 'l', 0, INT_MAX,
+			    dst_wp->sy, &cause);
+		} else {
+			size = args_percentage(args, 'l', 0, INT_MAX,
+			    dst_wp->sx, &cause);
+		}
+	} else if (args_has(args, 'p')) {
+		percentage = args_strtonum(args, 'p', 0, 100, &cause);
+		if (cause == NULL) {
 			if (type == LAYOUT_TOPBOTTOM)
 				size = (dst_wp->sy * percentage) / 100;
 			else
 				size = (dst_wp->sx * percentage) / 100;
-		} else {
-			size = args_strtonum(args, 'l', 0, INT_MAX, &cause);
-			if (cause != NULL) {
-				cmdq_error(item, "size %s", cause);
-				free(cause);
-				return (CMD_RETURN_ERROR);
-			}
 		}
-	} else if (args_has(args, 'p')) {
-		percentage = args_strtonum(args, 'p', 0, 100, &cause);
-		if (cause != NULL) {
-			cmdq_error(item, "percentage %s", cause);
-			free(cause);
-			return (CMD_RETURN_ERROR);
-		}
-		if (type == LAYOUT_TOPBOTTOM)
-			size = (dst_wp->sy * percentage) / 100;
-		else
-			size = (dst_wp->sx * percentage) / 100;
+	}
+	if (cause != NULL) {
+		cmdq_error(item, "size %s", cause);
+		free(cause);
+		return (CMD_RETURN_ERROR);
 	}
 
 	flags = 0;
diff --git a/cmd-resize-pane.c b/cmd-resize-pane.c
index 3962546d..b0aa2756 100644
--- a/cmd-resize-pane.c
+++ b/cmd-resize-pane.c
@@ -56,11 +56,10 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct window		*w = wl->window;
 	struct client		*c = item->client;
 	struct session		*s = item->target.s;
-	const char	       	*errstr, *p;
-	char			*cause, *copy;
+	const char	       	*errstr;
+	char			*cause;
 	u_int			 adjust;
-	int			 x, y, percentage;
-	size_t			 plen;
+	int			 x, y;
 
 	if (args_has(args, 'M')) {
 		if (cmd_mouse_window(&shared->mouse, &s) == NULL)
@@ -93,58 +92,21 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 		}
 	}
 
-	if ((p = args_get(args, 'x')) != NULL) {
-		plen = strlen(p);
-		if (p[plen - 1] == '%') {
-			copy = xstrdup(p);
-			copy[plen - 1] = '\0';
-			percentage = strtonum(copy, 0, INT_MAX, &errstr);
-			free(copy);
-			if (errstr != NULL) {
-				cmdq_error(item, "width %s", errstr);
-				return (CMD_RETURN_ERROR);
-			}
-			x = (w->sx * percentage) / 100;
-			if (x < PANE_MINIMUM)
-				x = PANE_MINIMUM;
-			if (x > INT_MAX)
-				x = INT_MAX;
-		} else {
-			x = args_strtonum(args, 'x', PANE_MINIMUM, INT_MAX,
-			    &cause);
-			if (cause != NULL) {
-				cmdq_error(item, "width %s", cause);
-				free(cause);
-				return (CMD_RETURN_ERROR);
-			}
+	if (args_has(args, 'x')) {
+		x = args_percentage(args, 'x', 0, INT_MAX, w->sx, &cause);
+		if (cause != NULL) {
+			cmdq_error(item, "width %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
 		}
 		layout_resize_pane_to(wp, LAYOUT_LEFTRIGHT, x);
 	}
-	if ((p = args_get(args, 'y')) != NULL) {
-		plen = strlen(p);
-		if (p[plen - 1] == '%') {
-			copy = xstrdup(p);
-			copy[plen - 1] = '\0';
-			percentage = strtonum(copy, 0, INT_MAX, &errstr);
-			free(copy);
-			if (errstr != NULL) {
-				cmdq_error(item, "height %s", errstr);
-				return (CMD_RETURN_ERROR);
-			}
-			y = (w->sy * percentage) / 100;
-			if (y < PANE_MINIMUM)
-				y = PANE_MINIMUM;
-			if (y > INT_MAX)
-				y = INT_MAX;
-		}
-		else {
-			y = args_strtonum(args, 'y', PANE_MINIMUM, INT_MAX,
-			    &cause);
-			if (cause != NULL) {
-				cmdq_error(item, "height %s", cause);
-				free(cause);
-				return (CMD_RETURN_ERROR);
-			}
+	if (args_has(args, 'y')) {
+		y = args_percentage(args, 'y', 0, INT_MAX, w->sy, &cause);
+		if (cause != NULL) {
+			cmdq_error(item, "width %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
 		}
 		layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
 	}
diff --git a/cmd-run-shell.c b/cmd-run-shell.c
index 1cf97d51..a57beb83 100644
--- a/cmd-run-shell.c
+++ b/cmd-run-shell.c
@@ -160,6 +160,7 @@ cmd_run_shell_callback(struct job *job)
 {
 	struct cmd_run_shell_data	*cdata = job_get_data(job);
 	struct bufferevent		*event = job_get_event(job);
+	struct cmdq_item		*item = cdata->item;
 	char				*cmd = cdata->cmd, *msg = NULL, *line;
 	size_t				 size;
 	int				 retcode, status;
@@ -189,13 +190,17 @@ cmd_run_shell_callback(struct job *job)
 	} else if (WIFSIGNALED(status)) {
 		retcode = WTERMSIG(status);
 		xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
+		retcode += 128;
 	}
 	if (msg != NULL)
 		cmd_run_shell_print(job, msg);
 	free(msg);
 
-	if (cdata->item != NULL)
-		cmdq_continue(cdata->item);
+	if (item != NULL) {
+		if (item->client != NULL && item->client->session == NULL)
+			item->client->retval = retcode;
+		cmdq_continue(item);
+	}
 }
 
 static void
diff --git a/tmux.h b/tmux.h
index b9817c24..a522c709 100644
--- a/tmux.h
+++ b/tmux.h
@@ -2062,6 +2062,8 @@ const char	*args_first_value(struct args *, u_char, struct args_value **);
 const char	*args_next_value(struct args_value **);
 long long	 args_strtonum(struct args *, u_char, long long, long long,
 		     char **);
+long long	 args_percentage(struct args *, u_char, long long,
+		     long long, long long, char **);
 
 /* cmd-find.c */
 int		 cmd_find_target(struct cmd_find_state *, struct cmdq_item *,
diff --git a/window-copy.c b/window-copy.c
index 53faa5a8..eeed210d 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -1566,12 +1566,12 @@ window_copy_cmd_select_line(struct window_copy_cmd_state *cs)
 	window_copy_cursor_start_of_line(wme);
 	data->selrx = data->cx;
 	data->selry = screen_hsize(data->backing) + data->cy - data->oy;
+	data->endselrx = window_copy_find_length(wme, data->selry);
+	data->endselry = data->selry;
 	window_copy_start_selection(wme);
 	for (; np > 1; np--)
 		window_copy_cursor_down(wme, 0);
 	window_copy_cursor_end_of_line(wme);
-	data->endselrx = data->cx;
-	data->endselry = screen_hsize(data->backing) + data->cy - data->oy;
 
 	return (WINDOW_COPY_CMD_REDRAW);
 }