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

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

#include "mt.h"
#include "uucp.h"

/* copy str into data space -- caller should report errors. */

static char *
strsave(const char *str)
{
        char *rval;

        rval = malloc(strlen(str) + 1);
        if (rval != 0)
                (void) strcpy(rval, str);
        return (rval);
}

/*
 * Determine if the effective user id has the appropriate permission
 *      on a file.  Modeled after access(2).
 *      amode:
 *              00      just checks for file existence.
 *              04      checks read permission.
 *              02      checks write permission.
 *              01      checks execute/search permission.
 *              other bits are ignored quietly.
 */

static int
eaccess(char *path, mode_t amode)
{
        struct stat     s;
        uid_t euid;

        if (stat(path, &s) == -1)
                return (-1);            /* can't stat file */
        amode &= 07;

        if ((euid = geteuid()) == 0)            /* root can do all */
                return (0);
        if (euid == s.st_uid)
            s.st_mode >>= 6;            /* use owner bits */
        else if (getegid() == s.st_gid)
            s.st_mode >>= 3;            /* use group bits */

        if ((amode & s.st_mode) == amode)
                return (0);             /* access permitted */
        errno = EACCES;
        return (-1);
}