76183f3453
spares (the size of the field was changed from u_short to u_int to reflect what it really ends up being). Accordingly, change users of xucred to set and check this field as appropriate. In the kernel, this is being done inside the new cru2x() routine which takes a `struct ucred' and fills out a `struct xucred' according to the former. This also has the pleasant sideaffect of removing some duplicate code. Reviewed by: rwatson
105 lines
4.1 KiB
C
105 lines
4.1 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_mtxp
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struct mtx *cr_mtxp; /* 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_int cr_version; /* structure layout version */
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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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#define XUCRED_VERSION 0
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#ifdef _KERNEL
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void cred_update_thread(struct thread *td);
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void change_egid(struct ucred *newcred, gid_t egid);
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void change_euid(struct ucred *newcred, uid_t euid);
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void change_rgid(struct ucred *newcred, gid_t rgid);
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void change_ruid(struct ucred *newcred, uid_t ruid);
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void change_svgid(struct ucred *newcred, gid_t svgid);
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void change_svuid(struct ucred *newcred, uid_t svuid);
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void crcopy(struct ucred *dest, struct ucred *src);
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struct ucred *crdup(struct ucred *cr);
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void crfree(struct ucred *cr);
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struct ucred *crget(void);
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struct ucred *crhold(struct ucred *cr);
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int crshared(struct ucred *cr);
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void cru2x(struct ucred *cr, struct xucred *xcr);
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int groupmember(gid_t gid, struct ucred *cred);
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#endif /* _KERNEL */
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#endif /* !_SYS_UCRED_H_ */
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