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 #ifdef HAVE_CONFIG_H 15 #include "config.h" 16 #endif 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 fflush (stdout); 32 c = getchar (); 33 rv = (c == 'y') || (c == 'Y'); 34 while (c != EOF && c != '\n') 35 c = getchar (); 36 37 return rv; 38 } 39