/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/*
 *  NAME
 *      delempty - delete an empty mail box
 *
 *  SYNOPSIS
 *      int delempty(mode_t mode, char *mailname)
 *
 *  DESCRIPTION
 *      Delete an empty mail box if it's allowed. Check
 *      the value of xgetenv("DEL_EMPTY_MFILE") for
 *      "yes" [always], "no" [never] or the default [based
 *      on the mode].
 */

#include "libmail.h"
#include <sys/types.h>
#include <unistd.h>

int
delempty(mode_t mode, char *mailname)
{
        char *del_empty = Xgetenv("DEL_EMPTY_MFILE");
        size_t del_len;
        int do_del = 0;

        del_len = strlen(del_empty);
        /* "yes" means always remove the mailfile */
        if (casncmp(del_empty, "yes", (ssize_t)del_len))
                do_del = 1;
        /* "no" means never remove the mailfile */
        else if (!casncmp(del_empty, "no", (ssize_t)del_len)) {
                /* check for mode 0660 */
                if ((mode & 07777) == MFMODE)
                        do_del = 1;
        }

        if (do_del)
                (void) unlink(mailname);
        return (do_del);
}