/*      $OpenBSD: ucred.h,v 1.14 2022/03/17 14:23:34 visa Exp $ */
/*      $NetBSD: ucred.h,v 1.12 1995/06/01 22:44:50 jtc Exp $   */

/*
 * Copyright (c) 1989, 1993
 *      The Regents of the University of California.  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 the University 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 THE REGENTS 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 THE REGENTS 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.
 *
 *      @(#)ucred.h     8.2 (Berkeley) 1/4/94
 */

#ifndef _SYS_UCRED_H_
#define _SYS_UCRED_H_

#include <sys/refcnt.h>
#include <sys/syslimits.h>

/*
 * Credentials.
 */
struct ucred {
        struct refcnt   cr_refcnt;      /* reference count */

/* The following fields are all copied by crset() */
#define cr_startcopy    cr_uid
        uid_t   cr_uid;                 /* effective user id */
        uid_t   cr_ruid;                /* Real user id. */
        uid_t   cr_svuid;               /* Saved effective user id. */
        gid_t   cr_gid;                 /* effective group id */
        gid_t   cr_rgid;                /* Real group id. */
        gid_t   cr_svgid;               /* Saved effective group id. */
        short   cr_ngroups;             /* number of groups */
        gid_t   cr_groups[NGROUPS_MAX]; /* groups */
};
#define NOCRED ((struct ucred *)-1)     /* no credential available */
#define FSCRED ((struct ucred *)-2)     /* filesystem credential */

/*
 *  Userspace version, for use in syscalls arguments
 */
struct xucred {
        uid_t   cr_uid;                 /* user id */
        gid_t   cr_gid;                 /* group id */
        short   cr_ngroups;             /* number of groups */
        gid_t   cr_groups[NGROUPS_MAX]; /* groups */
};

#ifdef _KERNEL

int             crfromxucred(struct ucred *, const struct xucred *);
void            crset(struct ucred *, const struct ucred *);
struct ucred    *crcopy(struct ucred *cr);
struct ucred    *crdup(struct ucred *cr);
void            crfree(struct ucred *cr);
struct ucred    *crget(void);
struct ucred    *crhold(struct ucred *);
int             suser(struct proc *p);
int             suser_ucred(struct ucred *cred);

#endif /* _KERNEL */

#endif /* !_SYS_UCRED_H_ */