busybox/libbb/ask_confirmation.c
2003-03-19 09:13:01 +00:00

50 lines
1.4 KiB
C

/* vi: set sw=4 ts=4: */
/*
* bb_ask_confirmation implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* 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 of the License, 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
*
*/
/* Read a line from stdin. If the first non-whitespace char is 'y' or 'Y',
* return 1. Otherwise return 0.
*/
#include <stdio.h>
#include <ctype.h>
#include "libbb.h"
int bb_ask_confirmation(void)
{
int retval = 0;
int first = 1;
int c;
while (((c = getchar()) != EOF) && (c != '\n')) {
/* Make sure we get the actual function call for isspace,
* as speed is not critical here. */
if (first && !(isspace)(c)) {
--first;
if ((c == 'y') || (c == 'Y')) {
++retval;
}
}
}
return retval;
}