From c034f9ded7a2b827f7f09fed8a0c531fd96a11b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Wed, 12 Aug 2015 19:14:43 +0200
Subject: ui: query terminal size on stderr

We always draw the editor user interface to stderr in order to
allow usage as a filter e.g.

 $ echo Hello | vis - | grep World > out

hence stdin might be redirected and we should always read the
terminal size from stderr.

Closes #66
---
 ui-curses.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'ui-curses.c')

diff --git a/ui-curses.c b/ui-curses.c
index 569b2ca..30e8c94 100644
--- a/ui-curses.c
+++ b/ui-curses.c
@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <signal.h>
@@ -300,7 +301,7 @@ static void ui_resize(Ui *ui) {
 	struct winsize ws;
 	int width, height;
 
-	if (ioctl(0, TIOCGWINSZ, &ws) == -1) {
+	if (ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1) {
 		getmaxyx(stdscr, height, width);
 	} else {
 		width = ws.ws_col;
-- 
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