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authorEric Andersen2003-09-15 08:33:45 +0000
committerEric Andersen2003-09-15 08:33:45 +0000
commit8efe967018dd79aacfe3ca1e2583f115d744e466 (patch)
tree7590704be6cf03c87242043f5909e12eb4150356 /libbb/get_terminal_width_height.c
parentc4f72d1426e03f046ac54a00d733a4a52c3a5d4b (diff)
downloadbusybox-8efe967018dd79aacfe3ca1e2583f115d744e466.zip
busybox-8efe967018dd79aacfe3ca1e2583f115d744e466.tar.gz
Be entirely consistant when using ioctl(0, TIOCGWINSZ, &winsize)
to ensure proper fallback behavior on, i.e. serial consoles. -Erik
Diffstat (limited to 'libbb/get_terminal_width_height.c')
-rw-r--r--libbb/get_terminal_width_height.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/libbb/get_terminal_width_height.c b/libbb/get_terminal_width_height.c
new file mode 100644
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--- /dev/null
+++ b/libbb/get_terminal_width_height.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * Determine the width and height of the terminal.
+ *
+ * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+/* It is perfectly ok to pass in a NULL for either width or for
+ * height, in which case that value will not be set. It is also
+ * perfectly ok to have CONFIG_FEATURE_AUTOWIDTH disabled, in
+ * which case you will always get 80x24 */
+void get_terminal_width_height(int fd, int *width, int *height)
+{
+ struct winsize win = { 0, 0, 0, 0 };
+#ifdef CONFIG_FEATURE_AUTOWIDTH
+ if (ioctl(0, TIOCGWINSZ, &win) != 0) {
+ win.ws_row = 24;
+ win.ws_col = 80;
+ }
+#endif
+ if (win.ws_row <= 1) {
+ win.ws_row = 24;
+ }
+ if (win.ws_col <= 1) {
+ win.ws_col = 80;
+ }
+ if (height) {
+ *height = (int) win.ws_row;
+ }
+ if (width) {
+ *width = (int) win.ws_col;
+ }
+}
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
+