shadow/libmisc/yesno.c

/*
 * Copyright 1992 - 1994, Julianne Frances Haugh
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Common code for yes/no prompting
 *
 * Used by pwck.c and grpck.c
 */

#include <config.h>

#ident "$Id$"

#include <stdio.h>
#include "prototypes.h"

/*
 * yes_or_no - get answer to question from the user
 *
 *	It returns 0 if no.
 *
 *	If the read_only flag is set, it will print No, and will return 0.
 */
int yes_or_no (int read_only)
{
	char buf[80];

	/*
	 * In read-only mode all questions are answered "no".
	 */
	if (read_only) {
		printf (_("No\n"));
		return 0;
	}

	/*
	 * Typically, there's a prompt on stdout, sometimes unflushed.
	 */
	fflush (stdout);

	/*
	 * Get a line and see what the first character is.
	 */
	/* TODO: use gettext */
	if (fgets (buf, sizeof buf, stdin))
		return buf[0] == 'y' || buf[0] == 'Y';

	return 0;
}