D40639.id123505.diff
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	diff --git a/share/man/man9/prison_check.9 b/share/man/man9/prison_check.9
	--- a/share/man/man9/prison_check.9
	+++ b/share/man/man9/prison_check.9
	@@ -27,22 +27,23 @@
	.\"
	.\" $FreeBSD$
	.\"
	-.Dd December 11, 2003
	+.Dd June 16, 2023
	.Dt PRISON_CHECK 9
	.Os
	.Sh NAME
	.Nm prison_check
	-.Nd determine if two credentials belong to the same jail
	+.Nd whether credentials belong to the same jail or a sub-jail
	.Sh SYNOPSIS
	.In sys/jail.h
	.Ft int
	.Fn prison_check "struct ucred cred1" "struct ucred cred2"
	.Sh DESCRIPTION
	-This function can be used to determine if the two credentials
	+This function can be used to determine if a subject with credentials
	.Fa cred1
	-and
	+is not denied access to subjects or objects with credentials
	.Fa cred2
	-belong to the same jail.
	+according to the policy that access is permitted to subjects or objects in the
	+same jail or sub-jails.
	.Sh RETURN VALUES
	The
	.Fn prison_check
	@@ -50,12 +51,9 @@
	returns
	.Er ESRCH
	if
	-.Fa cred1
	-has been jailed, and
	-.Fa cred1
	-and
	.Fa cred2
	-do not belong to the same jail.
	+is not in the same jail or a sub-jail of that of
	+.Fa cred1 .
	In all other cases,
	.Fn prison_check
	returns zero.