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a99500a912
This saves one malloc + free with typical cases and better utilizes memory. Submitted by: Tiwei Bie <btw mail.ustc.edu.cn> (slightly modified) X-Additional: JuniorJobs project
118 lines
4.3 KiB
C
118 lines
4.3 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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* 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 <bsm/audit.h>
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struct loginclass;
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#define XU_NGROUPS 16
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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. The
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* priv(9) interface should be used to check for privilege.
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*/
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#if defined(_KERNEL) || defined(_WANT_UCRED)
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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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int cr_ngroups; /* number of groups */
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gid_t cr_rgid; /* real group id */
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gid_t cr_svgid; /* saved group 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(2) */
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struct loginclass *cr_loginclass; /* login class */
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u_int cr_flags; /* credential flags */
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void *cr_pspare2[2]; /* general use 2 */
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#define cr_endcopy cr_label
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struct label *cr_label; /* MAC label */
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struct auditinfo_addr cr_audit; /* Audit properties. */
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gid_t *cr_groups; /* groups */
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int cr_agroups; /* Available groups */
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gid_t cr_smallgroups[XU_NGROUPS]; /* storage for small groups */
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};
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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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#endif /* _KERNEL || _WANT_UCRED */
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/*
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* Flags for cr_flags.
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*/
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#define CRED_FLAG_CAPMODE 0x00000001 /* In capability mode. */
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/*
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* This is the external representation of struct ucred.
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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[XU_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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/* This can be used for both ucred and xucred structures. */
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#define cr_gid cr_groups[0]
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#ifdef _KERNEL
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struct proc;
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struct thread;
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void change_egid(struct ucred *newcred, gid_t egid);
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void change_euid(struct ucred *newcred, struct uidinfo *euip);
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void change_rgid(struct ucred *newcred, gid_t rgid);
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void change_ruid(struct ucred *newcred, struct uidinfo *ruip);
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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 *crcopysafe(struct proc *p, struct ucred *cr);
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struct ucred *crdup(struct ucred *cr);
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void cred_update_thread(struct thread *td);
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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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void cru2x(struct ucred *cr, struct xucred *xcr);
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void crsetgroups(struct ucred *cr, int n, gid_t *groups);
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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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