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New realgroupmember()

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Like groupmember(), but taking into account the real group instead of
the effective group.  Leverages the new supplementary_group_member()
function.

Reviewed by:            mhorne
MFC after:              2 weeks
Sponsored by:           Kumacom SAS
Differential Revision:  https://reviews.freebsd.org/D40641
This commit is contained in:
Olivier Certner 2023-08-18 01:54:45 +02:00 committed by Mitchell Horne
parent b725f232f3
commit 2a2bfa6ad9
2 changed files with 14 additions and 0 deletions
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13
sys/kern/kern_prot.c
View file

@ -1316,6 +1316,19 @@ groupmember(gid_t gid, struct ucred *cred)
return (supplementary_group_member(gid, cred));
}
/*
* Check if gid is a member of the real group set (i.e., real and supplementary
* groups).
*/
int
realgroupmember(gid_t gid, struct ucred *cred)
{
if (gid == cred->cr_rgid)
return (1);
return (supplementary_group_member(gid, cred));
}
/*
* Test the active securelevel against a given level. securelevel_gt()
* implements (securelevel > level). securelevel_ge() implements

1
sys/sys/ucred.h
View file

@ -159,6 +159,7 @@ void cru2x(struct ucred *cr, struct xucred *xcr);
void cru2xt(struct thread *td, struct xucred *xcr);
void crsetgroups(struct ucred *cr, int n, gid_t *groups);
int groupmember(gid_t gid, struct ucred *cred);
int realgroupmember(gid_t gid, struct ucred *cred);
#endif /* _KERNEL */
#endif /* !_SYS_UCRED_H_ */