Initial revision

1 files changed, 54 insertions, 0 deletions

diff --git a/libshouldbeinlibc/termsize.c b/libshouldbeinlibc/termsize.c
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+/* Function to try and deduce what size the terminal is
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <sys/ioctl.h>
+
+/* Returns what we think is the size of the terminal attached to
+   file descriptor FD, of type TYPE, in WIDTH and/or HEIGHT.  If FD is
+   negative, the terminal isn't queried, and if TYPE is NULL, it isn't used.
+   Both WIDTH and HEIGHT may be NULL if only partial information is needed.
+   True is returned upon success.  Even if false is returned, both output
+   values are still written, with 0 for unknown, in case partial information
+   is useful.  */
+int
+deduce_term_size (int fd, char *type, int *width, int *height)
+{
+  int w = 0, h = 0;
+  struct winsize ws;
+  
+  if (fd >= 0 && ioctl (fd, TIOCGWINSZ, &ws) == 0)
+    /* Look at the actual terminal.  */
+    {
+      w = ws.ws_col;
+      h = ws.ws_row;
+    }
+  if (((width && !w) || (height && !h)) && type)
+    /* Try the terminal type.  */
+    {
+      /* XXX */
+    }
+
+  if (width)
+    *width = w;
+  if (height)
+    *height = h;
+
+  return (!width || w) && (!height && h);
+}