selinux-refpolicy/targeted/constraints

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#
# Define m4 macros for the constraints
#
#
# Define the constraints
#
# constrain class_set perm_set expression ;
#
# expression : ( expression )
# | not expression
# | expression and expression
# | expression or expression
# | u1 op u2
# | r1 role_op r2
# | t1 op t2
# | u1 op names
# | u2 op names
# | r1 op names
# | r2 op names
# | t1 op names
# | t2 op names
#
# op : == | !=
# role_op : == | != | eq | dom | domby | incomp
#
# names : name | { name_list }
# name_list : name | name_list name#
#
#
# Restrict the ability to transition to other users
# or roles to a few privileged types.
#
constrain process transition
( u1 == u2 or t1 == privuser );
constrain process transition
( r1 == r2 or t1 == privrole );
constrain process dyntransition
( u1 == u2 and r1 == r2);
#
# Restrict the ability to label objects with other
# user identities to a few privileged types.
#
constrain dir_file_class_set { create relabelto relabelfrom }
( u1 == u2 or t1 == privowner );
constrain socket_class_set { create relabelto relabelfrom }
( u1 == u2 or t1 == privowner );