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

     /*
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
    /*
     * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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     8.4 (Berkeley) 1/9/95
     */
    
    #ifndef _SYS_UCRED_H_
    #define _SYS_UCRED_H_
    
    #include <sys/appleapiopts.h>
    #include <sys/param.h>
    
    #ifdef __APPLE_API_UNSTABLE
    /*
     * Credentials.
     */
    struct ucred {
            u_long  cr_ref;                 /* reference count */
            uid_t   cr_uid;                 /* effective user id */
            short   cr_ngroups;             /* number of groups */
            gid_t   cr_groups[NGROUPS];     /* groups */
    };
    /*
     * This is the external representation of struct ucred.
     */
    struct xucred {
            u_int   cr_version;             /* structure layout version */
            uid_t   cr_uid;                 /* effective user id */
            short   cr_ngroups;             /* number of groups */
            gid_t   cr_groups[NGROUPS];     /* groups */
    };
    #define XUCRED_VERSION  0
    
    #define cr_gid cr_groups[0]
    #define NOCRED ((struct ucred *)0)      /* no credential available */
    #define FSCRED ((struct ucred *)-1)     /* filesystem credential */
    
    #ifdef KERNEL
    #define crhold(cr)                      \
    {                                       \
            if (++(cr)->cr_ref == 0)        \
                    panic("crhold");        \
    }
    
    struct ucred    *crcopy __P((struct ucred *cr));
   struct ucred    *crdup __P((struct ucred *cr));
   void            crfree __P((struct ucred *cr));
   struct ucred    *crget __P((void));
   int             crcmp __P((struct ucred *cr1, struct ucred *cr2));
   int             suser __P((struct ucred *cred, u_short *acflag));
   void            cru2x __P((struct ucred *cr, struct xucred *xcr));
   
   #endif /* KERNEL */
   #endif /* __APPLE_API_UNSTABLE */
   
   #endif /* !_SYS_UCRED_H_ */

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