1/* dribble.c -- dribble files for Info. 2 $Id: dribble.c,v 1.3 2004/04/11 17:56:45 karl Exp $ 3 4 Copyright (C) 1993, 1998, 2004 Free Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 20 Written by Brian Fox (bfox@ai.mit.edu). */ 21 22#include "info.h" 23#include "dribble.h" 24 25/* When non-zero, it is a stream to write all input characters to for the 26 duration of this info session. */ 27FILE *info_dribble_file = (FILE *)NULL; 28 29/* Open a dribble file named NAME, perhaps closing an already open one. 30 This sets the global variable INFO_DRIBBLE_FILE to the open stream. */ 31void 32open_dribble_file (char *name) 33{ 34 /* Perhaps close existing dribble file. */ 35 close_dribble_file (); 36 37 /* Keystrokes can be non-printable characters, so we need binary I/O. */ 38 info_dribble_file = fopen (name, FOPEN_WBIN); 39 40#if defined (HAVE_SETVBUF) 41 if (info_dribble_file) 42# if defined (SETVBUF_REVERSED) 43 setvbuf (info_dribble_file, _IONBF, (char *)NULL, 1); 44# else 45 setvbuf (info_dribble_file, (char *)NULL, _IONBF, 1); 46# endif /* !SETVBUF_REVERSED */ 47#endif /* HAVE_SETVBUF */ 48} 49 50/* If there is a dribble file already open, close it. */ 51void 52close_dribble_file (void) 53{ 54 if (info_dribble_file) 55 { 56 fflush (info_dribble_file); 57 fclose (info_dribble_file); 58 info_dribble_file = (FILE *)NULL; 59 } 60} 61 62/* Write some output to our existing dribble file. */ 63void 64dribble (unsigned char byte) 65{ 66 if (info_dribble_file) 67 fwrite (&byte, sizeof (unsigned char), 1, info_dribble_file); 68} 69