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bd78cece5d
- crhold() returns a reference to the ucred whose refcount it bumps. - crcopy() now simply copies the credentials from one credential to another and has no return value. - a new crshared() primitive is added which returns true if a ucred's refcount is > 1 and false (0) otherwise.
102 lines
4.0 KiB
C
102 lines
4.0 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ucred.h 8.4 (Berkeley) 1/9/95
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* $FreeBSD$
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*/
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#ifndef _SYS_UCRED_H_
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#define _SYS_UCRED_H_
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#include <sys/queue.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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/*
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* Credentials.
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*
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* Please do not inspect cr_uid directly to determine superuserness.
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* Only the suser()/suser_xxx() function should be used for this.
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*/
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struct ucred {
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u_int cr_ref; /* reference count */
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#define cr_startcopy cr_uid
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uid_t cr_uid; /* effective user id */
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uid_t cr_ruid; /* real user id */
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uid_t cr_svuid; /* saved user id */
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short cr_ngroups; /* number of groups */
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gid_t cr_groups[NGROUPS]; /* groups */
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gid_t cr_rgid; /* real group id */
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gid_t cr_svgid; /* saved user id */
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struct uidinfo *cr_uidinfo; /* per euid resource consumption */
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struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */
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struct prison *cr_prison; /* jail(4) */
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#define cr_endcopy cr_mtx
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struct mtx cr_mtx; /* protect refcount */
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};
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#define cr_gid cr_groups[0]
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#define NOCRED ((struct ucred *)0) /* no credential available */
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#define FSCRED ((struct ucred *)-1) /* filesystem credential */
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/*
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* This is the external representation of struct ucred, based upon the
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* size of a 4.2-RELEASE struct ucred. There will probably never be
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* any need to change the size of this or layout of its used fields.
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*/
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struct xucred {
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u_short _cr_unused0; /* compatibility with old ucred */
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uid_t cr_uid; /* effective user id */
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short cr_ngroups; /* number of groups */
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gid_t cr_groups[NGROUPS]; /* groups */
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void *_cr_unused1; /* compatibility with old ucred */
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};
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#ifdef _KERNEL
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void change_egid __P((struct ucred *newcred, gid_t egid));
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void change_euid __P((struct ucred *newcred, uid_t euid));
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void change_rgid __P((struct ucred *newcred, gid_t rgid));
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void change_ruid __P((struct ucred *newcred, uid_t ruid));
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void change_svgid __P((struct ucred *newcred, gid_t svgid));
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void change_svuid __P((struct ucred *newcred, uid_t svuid));
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void crcopy __P((struct ucred *dest, struct ucred *src));
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struct ucred *crdup __P((struct ucred *cr));
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void crfree __P((struct ucred *cr));
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struct ucred *crget __P((void));
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struct ucred *crhold __P((struct ucred *cr));
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int crshared __P((struct ucred *cr));
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int groupmember __P((gid_t gid, struct ucred *cred));
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#endif /* _KERNEL */
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#endif /* !_SYS_UCRED_H_ */
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