1 /* $NetBSD: dribble.c,v 1.1.1.1 2016/01/14 00:11:29 christos Exp $ */ 2 3 /* dribble.c -- dribble files for Info. 4 Id: dribble.c,v 1.3 2004/04/11 17:56:45 karl Exp 5 6 Copyright (C) 1993, 1998, 2004 Free Software Foundation, Inc. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 22 Written by Brian Fox (bfox@ai.mit.edu). */ 23 24 #include "info.h" 25 #include "dribble.h" 26 27 /* When non-zero, it is a stream to write all input characters to for the 28 duration of this info session. */ 29 FILE *info_dribble_file = (FILE *)NULL; 30 31 /* Open a dribble file named NAME, perhaps closing an already open one. 32 This sets the global variable INFO_DRIBBLE_FILE to the open stream. */ 33 void 34 open_dribble_file (char *name) 35 { 36 /* Perhaps close existing dribble file. */ 37 close_dribble_file (); 38 39 /* Keystrokes can be non-printable characters, so we need binary I/O. */ 40 info_dribble_file = fopen (name, FOPEN_WBIN); 41 42 #if defined (HAVE_SETVBUF) 43 if (info_dribble_file) 44 # if defined (SETVBUF_REVERSED) 45 setvbuf (info_dribble_file, _IONBF, (char *)NULL, 1); 46 # else 47 setvbuf (info_dribble_file, (char *)NULL, _IONBF, 1); 48 # endif /* !SETVBUF_REVERSED */ 49 #endif /* HAVE_SETVBUF */ 50 } 51 52 /* If there is a dribble file already open, close it. */ 53 void 54 close_dribble_file (void) 55 { 56 if (info_dribble_file) 57 { 58 fflush (info_dribble_file); 59 fclose (info_dribble_file); 60 info_dribble_file = (FILE *)NULL; 61 } 62 } 63 64 /* Write some output to our existing dribble file. */ 65 void 66 dribble (unsigned char byte) 67 { 68 if (info_dribble_file) 69 fwrite (&byte, sizeof (unsigned char), 1, info_dribble_file); 70 } 71