Copyright (c) 2006 Ceri Davies <ceri@FreeBSD.org>
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$FreeBSD: releng/10.2/share/man/man9/cr_cansee.9 206622 2010-04-14 19:08:06Z uqs $
.Dd November 19, 2006 .Dt CR_CANSEE 9 .Os .Sh NAME .Nm cr_cansee .Nd "determine visibility of objects given their user credentials" .Sh SYNOPSIS n sys/param.h n sys/systm.h n sys/ucred.h .Ft int .Fn cr_cansee "struct ucred *u1" "struct ucred *u2" .Sh DESCRIPTION This function determines the visibility of objects in the kernel based on the real user IDs and group IDs in the credentials .Fa u1 and .Fa u2 associated with them.
p The visibility of objects is influenced by the .Xr sysctl 8 variables .Va security.bsd.see_other_gids and .Va security.bsd.see_other_uids , as per the description in .Xr cr_seeothergids 9 and .Xr cr_seeotheruids 9 respectively. .Sh RETURN VALUES This function returns zero if the object with credential .Fa u1 can .Dq see the object with credential .Fa u2 , or .Er ESRCH otherwise. .Sh ERRORS l -tag -width Er t Bq Er ESRCH The object with credential .Fa u1 cannot .Dq see the object with credential .Fa u2 . t Bq Er ESRCH The object with credential .Fa u1 has been jailed and the object with credential .Fa u2 does not belong to the same jail as .Fa u1 . t Bq Er ESRCH The MAC subsystem denied visibility. .El .Sh SEE ALSO .Xr cr_seeothergids 9 , .Xr cr_seeotheruids 9 , .Xr mac 9 , .Xr p_cansee 9