/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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) 1993-1997 by Sun Microsystems, Inc.
 * All rights reserved
 */

/* LINTLIBRARY */

/*
 * Convert ACL to/from permission bits
 */

#include <errno.h>
#include <sys/acl.h>

int
acltomode(aclent_t *aclbufp, int nentries, mode_t *modep)
{
        aclent_t                *tp;
        unsigned long           mode;
        unsigned long           grpmode;
        unsigned long           mask;
        int                     which;
        int                     got_mask = 0;

        *modep = 0;
        if (aclcheck(aclbufp, nentries, &which) != 0) {
                errno = EINVAL;
                return (-1);    /* errno is set in aclcheck() */
        }
        for (tp = aclbufp; nentries--; tp++) {
                if (tp->a_type == USER_OBJ) {
                        mode = tp->a_perm;
                        if (mode > 07)
                                return (-1);
                        *modep |= (mode << 6);
                        continue;
                }
                if (tp->a_type == GROUP_OBJ) {
                        grpmode = tp->a_perm;
                        if (grpmode > 07)
                                return (-1);
                        continue;
                }
                if (tp->a_type == CLASS_OBJ) {
                        got_mask = 1;
                        mask = tp->a_perm;
                        if (mask > 07)
                                return (-1);
                        *modep |= (mask << 3);
                        continue;
                }
                if (tp->a_type == OTHER_OBJ) {
                        mode = tp->a_perm;
                        if (mode > 07)
                                return (-1);
                        *modep |= mode;
                        continue; /* we may break here if it is sorted */
                }
        }
        if (!got_mask)
                *modep |= (grpmode << 3);
        return (0);
}


int
aclfrommode(aclent_t *aclbufp, int nentries, mode_t *modep)
{
        aclent_t                *tp;
        aclent_t                *savp;
        mode_t                  mode;
        mode_t                  grpmode;
        int                     which;
        int                     got_mask = 0;

        if (aclcheck(aclbufp, nentries, &which) != 0) {
                errno = EINVAL;
                return (-1);    /* errno is set in aclcheck() */
        }
        for (tp = aclbufp; nentries--; tp++) {
                if (tp->a_type == USER_OBJ) {
                        mode = (*modep & 0700);
                        tp->a_perm = (mode >> 6);
                        continue;
                }
                if (tp->a_type == GROUP_OBJ) {
                        grpmode = (*modep & 070);
                        savp = tp;
                        continue;
                }
                if (tp->a_type == CLASS_OBJ) {
                        got_mask = 1;
                        mode = (*modep & 070);
                        tp->a_perm = (mode >> 3);
                        continue;
                }
                if (tp->a_type == OTHER_OBJ) {
                        mode = (*modep & 07);
                        tp->a_perm = (o_mode_t)mode;
                        continue; /* we may break here if it is sorted */
                }
        }
        if (!got_mask)
                savp->a_perm = (grpmode >> 3);
        return (0);
}