#

# 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		

#

#

# SELinux process identity change constraint:

#

constrain process transition

	( u1 == u2

ifdef(`targeted_policy',`

	or t1 == can_change_process_identity

',`

	or ( t1 == can_change_process_identity and t2 == process_user_target )

       	or ( t1 == cron_source_domain

		and ( t2 == cron_job_domain or u2 == system_u )

	   )

	or (t1 == process_uncond_exempt)

	or (t1 == can_system_change and u2 == system_u )

')

);

#

# SELinux process role change constraint:

#

constrain process transition 

	( r1 == r2

ifdef(`targeted_policy',`

	or t1 == can_change_process_role

',`

	or ( t1 == can_change_process_role and t2 == process_user_target )

       	or ( t1 == cron_source_domain and t2 == cron_job_domain )

	or ( t1 == process_uncond_exempt )

	ifdef(`postfix.te',`

		ifdef(`direct_sysadm_daemon',`

			or (

				t1 == sysadm_mail_t

				and t2 == system_mail_t

				and r2 == system_r

			)

		')

	')

	or (t1 == can_system_change and r2 == system_r )

')

);

#

# SELinux dynamic transition constraint:

#

constrain process dyntransition

	( u1 == u2 and r1 == r2 );

#

# SElinux object identity change constraint:

#

constrain dir_file_class_set { create relabelto relabelfrom } 

	( u1 == u2 or t1 == can_change_object_identity );

constrain socket_class_set { create relabelto relabelfrom } 

	( u1 == u2 or t1 == can_change_object_identity );