1 files changed, 67 insertions, 0 deletions
diff --git a/info/dribble.c b/info/dribble.c
new file mode 100644
index 0000000..e77370b
--- /dev/null
+++ b/info/dribble.c
@@ -0,0 +1,67 @@
+/* dribble.c -- dribble files for Info.
+   $Id: dribble.c,v 1.7 2008/06/11 09:55:41 gray Exp $
+
+   Copyright (C) 1993, 1998, 2004, 2007, 2008 Free Software Foundation, Inc.
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+
+   Written by Brian Fox (bfox@ai.mit.edu). */
+
+#include "info.h"
+#include "dribble.h"
+
+/* When non-zero, it is a stream to write all input characters to for the
+   duration of this info session. */
+FILE *info_dribble_file = NULL;
+
+/* Open a dribble file named NAME, perhaps closing an already open one.
+   This sets the global variable INFO_DRIBBLE_FILE to the open stream. */
+void
+open_dribble_file (char *name)
+{
+  /* Perhaps close existing dribble file. */
+  close_dribble_file ();
+
+  /* Keystrokes can be non-printable characters, so we need binary I/O.  */
+  info_dribble_file = fopen (name, FOPEN_WBIN);
+
+#if defined (HAVE_SETVBUF)
+  if (info_dribble_file)
+#  if defined (SETVBUF_REVERSED)
+    setvbuf (info_dribble_file, _IONBF, NULL, 1);
+#  else
+    setvbuf (info_dribble_file, NULL, _IONBF, 1);
+#  endif /* !SETVBUF_REVERSED */
+#endif /* HAVE_SETVBUF */
+}
+
+/* If there is a dribble file already open, close it. */
+void
+close_dribble_file (void)
+{
+  if (info_dribble_file)
+    {
+      fflush (info_dribble_file);
+      fclose (info_dribble_file);
+      info_dribble_file = NULL;
+    }
+}
+
+/* Write some output to our existing dribble file. */
+void
+dribble (unsigned char byte)
+{
+  if (info_dribble_file)
+    fwrite (&byte, sizeof (unsigned char), 1, info_dribble_file);
+}