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/* yesno.c -- read a yes/no response from stdin
Copyright (C) 1990, 1998, 2001 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>
#include "unlocked-io.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;
}
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