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Annotation of XNU/bsd/sys/ucred.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
                     23: /*
                     24:  * Copyright (c) 1989, 1993
                     25:  *     The Regents of the University of California.  All rights reserved.
                     26:  *
                     27:  * Redistribution and use in source and binary forms, with or without
                     28:  * modification, are permitted provided that the following conditions
                     29:  * are met:
                     30:  * 1. Redistributions of source code must retain the above copyright
                     31:  *    notice, this list of conditions and the following disclaimer.
                     32:  * 2. Redistributions in binary form must reproduce the above copyright
                     33:  *    notice, this list of conditions and the following disclaimer in the
                     34:  *    documentation and/or other materials provided with the distribution.
                     35:  * 3. All advertising materials mentioning features or use of this software
                     36:  *    must display the following acknowledgement:
                     37:  *     This product includes software developed by the University of
                     38:  *     California, Berkeley and its contributors.
                     39:  * 4. Neither the name of the University nor the names of its contributors
                     40:  *    may be used to endorse or promote products derived from this software
                     41:  *    without specific prior written permission.
                     42:  *
                     43:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     44:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     45:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     46:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     47:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     48:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     49:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     50:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     51:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     52:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     53:  * SUCH DAMAGE.
                     54:  *
                     55:  *     @(#)ucred.h     8.4 (Berkeley) 1/9/95
                     56:  */
                     57: 
                     58: #ifndef _SYS_UCRED_H_
                     59: #define        _SYS_UCRED_H_
                     60: 
                     61: #include <sys/param.h>
                     62: 
                     63: /*
                     64:  * Credentials.
                     65:  */
                     66: struct ucred {
                     67:        u_long  cr_ref;                 /* reference count */
                     68:        uid_t   cr_uid;                 /* effective user id */
                     69:        short   cr_ngroups;             /* number of groups */
                     70:        gid_t   cr_groups[NGROUPS];     /* groups */
                     71: };
                     72: #define cr_gid cr_groups[0]
                     73: #define NOCRED ((struct ucred *)0)     /* no credential available */
                     74: #define FSCRED ((struct ucred *)-1)    /* filesystem credential */
                     75: 
                     76: #ifdef KERNEL
                     77: #define        crhold(cr)                      \
                     78: {                                      \
                     79:        if (++(cr)->cr_ref == 0)        \
                     80:                panic("crhold");        \
                     81: }
                     82: 
                     83: struct ucred   *crcopy __P((struct ucred *cr));
                     84: struct ucred   *crdup __P((struct ucred *cr));
                     85: void           crfree __P((struct ucred *cr));
                     86: struct ucred   *crget __P((void));
                     87: int            suser __P((struct ucred *cred, u_short *acflag));
                     88: #endif /* KERNEL */
                     89: 
                     90: #endif /* !_SYS_UCRED_H_ */

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