/* 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 (); int yesno () { /* 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; }