lib/yesno.c

   1 /* yesno.c -- read a yes/no response from stdin
   2    Copyright (C) 1990 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #include <stdio.h>
  19
  20 /* Read one line from standard input
  21    and return nonzero if that line begins with y or Y,
  22    otherwise return 0. */
  23
  24 int
  25 yesno ()
  26 {
  27   int c;
  28   int rv;
  29
  30   fflush (stderr);
  31   c = getchar ();
  32   rv = (c == 'y') || (c == 'Y');
  33   while (c != EOF && c != '\n')
  34     c = getchar ();
  35
  36   return rv;
  37 }