FreeBSD/Linux Kernel Cross Reference
sys/sys/ucred.h

     /*      $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_ */

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