/* yesno.c -- read a yes/no response from stdin   Copyright (C) 1990, 1998 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */#if HAVE_CONFIG_H# include <config.h>#endif#include <ctype.h>#if HAVE_STDLIB_H# include <stdlib.h>#endif#include <stdio.h>/* Read one line from standard input   and return nonzero if that line begins with y or Y,   otherwise return 0. */int rpmatch ();intyesno (){  /* We make some assumptions here:     a) leading white space in the response are not vital     b) the first 128 characters of the answer are enough (the rest can	be ignored)     I cannot think for a situation where this is not ok.  --drepper@gnu  */  char buf[128];  int len = 0;  int c;  while ((c = getchar ()) != EOF && c != '\n')    if ((len > 0 && len < 127) || (len == 0 && !isspace (c)))      buf[len++] = c;  buf[len] = '\0';  return rpmatch (buf) == 1;}