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29 * @(#)ucred.h 8.4 (Berkeley) 1/9/95
36 #include <bsm/audit.h>
41 * Please do not inspect cr_uid directly to determine superuserness. The
42 * priv(9) interface should be used to check for privilege.
44 #if defined(_KERNEL) || defined(_WANT_UCRED)
46 u_int cr_ref; /* reference count */
47 #define cr_startcopy cr_uid
48 uid_t cr_uid; /* effective user id */
49 uid_t cr_ruid; /* real user id */
50 uid_t cr_svuid; /* saved user id */
51 short cr_ngroups; /* number of groups */
52 gid_t cr_groups[NGROUPS]; /* groups */
53 gid_t cr_rgid; /* real group id */
54 gid_t cr_svgid; /* saved group id */
55 struct uidinfo *cr_uidinfo; /* per euid resource consumption */
56 struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */
57 struct prison *cr_prison; /* jail(2) */
58 void *cr_pspare[3]; /* vimage 2; general use 1 */
59 #define cr_endcopy cr_label
60 struct label *cr_label; /* MAC label */
61 struct auditinfo_addr cr_audit; /* Audit properties. */
63 #define NOCRED ((struct ucred *)0) /* no credential available */
64 #define FSCRED ((struct ucred *)-1) /* filesystem credential */
65 #endif /* _KERNEL || _WANT_UCRED */
68 * This is the external representation of struct ucred.
71 u_int cr_version; /* structure layout version */
72 uid_t cr_uid; /* effective user id */
73 short cr_ngroups; /* number of groups */
74 gid_t cr_groups[NGROUPS]; /* groups */
75 void *_cr_unused1; /* compatibility with old ucred */
77 #define XUCRED_VERSION 0
79 /* This can be used for both ucred and xucred structures. */
80 #define cr_gid cr_groups[0]
85 void change_egid(struct ucred *newcred, gid_t egid);
86 void change_euid(struct ucred *newcred, struct uidinfo *euip);
87 void change_rgid(struct ucred *newcred, gid_t rgid);
88 void change_ruid(struct ucred *newcred, struct uidinfo *ruip);
89 void change_svgid(struct ucred *newcred, gid_t svgid);
90 void change_svuid(struct ucred *newcred, uid_t svuid);
91 void crcopy(struct ucred *dest, struct ucred *src);
92 struct ucred *crdup(struct ucred *cr);
93 void cred_update_thread(struct thread *td);
94 void crfree(struct ucred *cr);
95 struct ucred *crget(void);
96 struct ucred *crhold(struct ucred *cr);
97 int crshared(struct ucred *cr);
98 void cru2x(struct ucred *cr, struct xucred *xcr);
99 int groupmember(gid_t gid, struct ucred *cred);
102 #endif /* !_SYS_UCRED_H_ */