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

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "string.h"
#include "unistd.h"

#include "lp.h"
#include "access.h"
#include <pwd.h>
#include <auth_attr.h>
#include <auth_list.h>
#include <tsol/label.h>

/**
 ** is_user_admin() - CHECK IF CURRENT USER IS AN ADMINISTRATOR
 **/

int
#if     defined(__STDC__)
is_user_admin (
        void
)
#else
is_user_admin ()
#endif
{
        /* For a labeled system, tsol_check_admin_auth is called
         * instead of using Access.
         */
        if (is_system_labeled()) {
                /* Check that user has print admin authorization */
                return (tsol_check_admin_auth(getuid()));
        } else {
                return (Access(Lp_A, W_OK) == -1? 0 : 1);
        }
}

/**
 ** is_user_allowed() - CHECK USER ACCESS ACCORDING TO ALLOW/DENY LISTS
 **/

int
#if     defined(__STDC__)
is_user_allowed (
        char *                  user,
        char **                 allow,
        char **                 deny
)
#else
is_user_allowed (user, allow, deny)
        char                    *user,
                                **allow,
                                **deny;
#endif
{
        if (bangequ(user, LOCAL_LPUSER) || bangequ(user, LOCAL_ROOTUSER))
                return (1);

        return (allowed(user, allow, deny));
}

/**
 ** is_user_allowed_form() - CHECK USER ACCESS TO FORM
 **/

int
#if     defined(__STDC__)
is_user_allowed_form (
        char *                  user,
        char *                  form
)
#else
is_user_allowed_form (user, form)
        char                    *user,
                                *form;
#endif
{
        char                    **allow,
                                **deny;

        if (loadaccess(Lp_A_Forms, form, "", &allow, &deny) == -1)
                return (-1);

        return (is_user_allowed(user, allow, deny));
}

/**
 ** is_user_allowed_printer() - CHECK USER ACCESS TO PRINTER
 **/

int
#if     defined(__STDC__)
is_user_allowed_printer (
        char *                  user,
        char *                  printer
)
#else
is_user_allowed_printer (user, printer)
        char                    *user,
                                *printer;
#endif
{
        char                    **allow,
                                **deny;

        if (loadaccess(Lp_A_Printers, printer, UACCESSPREFIX, &allow, &deny) == -1)
                return (-1);

        return (is_user_allowed(user, allow, deny));
}

/**
 ** is_form_allowed_printer() - CHECK FORM USE ON PRINTER
 **/

int
#if     defined(__STDC__)
is_form_allowed_printer (
        char *                  form,
        char *                  printer
)
#else
is_form_allowed_printer (form, printer)
        char                    *form,
                                *printer;
#endif
{
        char                    **allow,
                                **deny;

        if (loadaccess(Lp_A_Printers, printer, FACCESSPREFIX, &allow, &deny) == -1)
                return (-1);

        return (allowed(form, allow, deny));
}

/**
 ** allowed() - GENERAL ROUTINE TO CHECK ALLOW/DENY LISTS
 **/

int
#if     defined(__STDC__)
allowed (
        char *                  item,
        char **                 allow,
        char **                 deny
)
#else
allowed (item, allow, deny)
        char                    *item,
                                **allow,
                                **deny;
#endif
{
        if (allow) {
                if (bang_searchlist(item, allow))
                        return (1);
                else
                        return (0);
        }

        if (deny) {
                if (bang_searchlist(item, deny))
                        return (0);
                else
                        return (1);
        }

        return (0);
}

/*
 * Check to see if the specified user has the administer the printing
 * system authorization.
 */
int
tsol_check_admin_auth(uid_t uid)
{
        struct passwd *p;
        char *name;

        p = getpwuid(uid);
        if (p != NULL && p->pw_name != NULL)
                name = p->pw_name;
        else
                name = "";

        return (chkauthattr(PRINT_ADMIN_AUTH, name));
}