Imported from ../bash-3.1.tar.gz.

lib/sh/winsize.c

@@ -0,0 +1,82 @@
+/* Handle window size changes and information. */
+
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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, or (at your option) any later
+   version.
+
+   Bash 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 Bash; see the file COPYING.  If not, write to the Free Software
+   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#include "config.h"
+
+#include <stdc.h>
+
+#include "bashtypes.h"
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include <sys/ioctl.h>
+
+#if !defined (STRUCT_WINSIZE_IN_SYS_IOCTL)
+/* For struct winsize on SCO */
+/*   sys/ptem.h has winsize but needs mblk_t from sys/stream.h */
+#  if defined (HAVE_SYS_PTEM_H) && defined (TIOCGWINSZ) && defined (SIGWINCH)
+#    if defined (HAVE_SYS_STREAM_H)
+#      include <sys/stream.h>
+#    endif
+#    include <sys/ptem.h>
+#  endif /* HAVE_SYS_PTEM_H && TIOCGWINSZ && SIGWINCH */
+#endif /* !STRUCT_WINSIZE_IN_SYS_IOCTL */
+
+#include <stdio.h>
+
+/* Return the fd from which we are actually getting input. */
+#define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr)
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+extern int shell_tty;
+
+#if defined (READLINE)
+extern void rl_set_screen_size __P((int, int));
+#endif
+
+void
+get_new_window_size (from_sig, rp, cp)
+     int from_sig;
+     int *rp, *cp;
+{
+#if defined (TIOCGWINSZ)
+  struct winsize win;
+  int tty;
+
+  tty = input_tty ();
+  if (tty >= 0 && (ioctl (tty, TIOCGWINSZ, &win) == 0) &&
+      win.ws_row > 0 && win.ws_col > 0)
+    {
+      sh_set_lines_and_columns (win.ws_row, win.ws_col);
+#if defined (READLINE)
+      rl_set_screen_size (win.ws_row, win.ws_col);
+      if (rp)
+	*rp = win.ws_row;
+      if (cp)
+	*cp = win.ws_col;
+#endif
+    }
+#endif
+}