.TH "security_compute_av" "3" "1 January 2004" "russell@coker.com.au" "SE Linux API documentation"

.SH "NAME"

security_compute_av, security_compute_create, security_compute_relabel, security_compute_user \- query

the SE Linux policy database in the kernel.

.SH "SYNOPSIS"

.B #include <selinux/selinux.h>

.br

.B #include <selinux/flask.h>

.sp

.BI "int security_compute_av(security_context_t "scon ", security_context_t "tcon ", security_class_t "tclass ", access_vector_t "requested ", struct av_decision *" avd );

.sp

.BI "int security_compute_create(security_context_t "scon ", security_context_t "tcon ", security_class_t "tclass ", security_context_t *" newcon );

.sp

.BI "int security_compute_relabel(security_context_t "scon ", security_context_t "tcon ", security_class_t "tclass ", security_context_t *" newcon );

.sp

.BI "int security_compute_user(security_context_t "scon ", const char *" username ", security_context_t **" con );

.sp

.BI "int checkPasswdAccess(access_vector_t " requested );

.SH "DESCRIPTION"

.B security_compute_av

queries whether the policy permits the source context

.B scon

to access the target context

.B tcon

via class

.B tclass

with the

.B requested

access vector. See the cron source for a usage example.

.B security_compute_create

is used to compute a context to use for labeling a new object in a particular

class based on a SID pair.

.B security_compute_relabel

is used to compute the new context to use when relabeling an object, it is used

in the pam_selinux.so source and the newrole source to determine the correct

label for the tty at login time, but can be used for other things.

.B security_compute_user

is used to determine the set of user contexts that can be reached from a

source context. Is mainly used by

.B get_ordered_context_list.

.B checkPasswdAccess

This functions is a helper functions that allows you to check for a permission in the passwd class. checkPasswdAccess uses getprevcon() for the source and target security contexts.

.SH "RETURN VALUE"

0 for success and on error -1 is returned.

.SH "SEE ALSO"

.BR getcon "(3), " getfilecon "(3), " get_ordered_context_list "(3)"