188 lines
3.9 KiB
Cheetah
188 lines
3.9 KiB
Cheetah
########################################
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#
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# Macros for switching between source policy
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# and loadable policy module support
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#
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##############################
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#
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# For adding the module statement
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#
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define(`policy_module',`
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ifdef(`self_contained_policy',`',`
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module $1 $2;
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require {
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role system_r;
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all_kernel_class_perms
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}
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')
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')
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##############################
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#
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# For use in interfaces, to optionally insert a require block
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#
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define(`gen_require',`
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ifdef(`self_contained_policy',`
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ifdef(`__in_optional_policy',`
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require {
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$1
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} # end require
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')
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',`
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require {
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$1
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} # end require
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')
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')
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# helper function, since m4 wont expand macros
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# if a line is a comment (#):
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define(`policy_m4_comment',`
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##### $2 depth: $1
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')dnl
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##############################
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#
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# In the future interfaces should be in loadable modules
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#
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# template(name,rules)
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#
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define(`template',` dnl
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ifdef(`$1',`errprint(__file__:__line__`: duplicate definition of $1(). Original definition on '$1. __endline__)',`define(`$1',__line__)') dnl
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`define(`$1',` dnl
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define(`policy_temp',incr(policy_call_depth)) dnl
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pushdef(`policy_call_depth',policy_temp) dnl
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undefine(`policy_temp') dnl
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policy_m4_comment(policy_call_depth,begin `$1'(dollarsstar)) dnl
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$2 dnl
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define(`policy_temp',decr(policy_call_depth)) dnl
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pushdef(`policy_call_depth',policy_temp) dnl
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undefine(`policy_temp') dnl
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policy_m4_comment(policy_call_depth,end `$1'(dollarsstar)) dnl
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'')
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')
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##############################
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#
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# In the future interfaces should be in loadable modules
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#
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# interface(name,rules)
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#
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define(`interface',` dnl
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ifdef(`$1',`errprint(__file__:__line__`: duplicate definition of $1(). Original definition on '$1. __endline__)',`define(`$1',__line__)') dnl
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`define(`$1',` dnl
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define(`policy_temp',incr(policy_call_depth)) dnl
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pushdef(`policy_call_depth',policy_temp) dnl
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undefine(`policy_temp') dnl
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policy_m4_comment(policy_call_depth,begin `$1'(dollarsstar)) dnl
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$2
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define(`policy_temp',decr(policy_call_depth)) dnl
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pushdef(`policy_call_depth',policy_temp) dnl
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undefine(`policy_temp') dnl
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policy_m4_comment(policy_call_depth,end `$1'(dollarsstar)) dnl
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'')
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')
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define(`policy_call_depth',0)
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##############################
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#
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# Optional policy handling
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#
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define(`optional_policy',`
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ifelse(regexp(`$1',`\W'),`-1',`
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errprint(__file__:__line__`: deprecated use of module name ($1) as first parameter of optional_policy() block.' __endline__)
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optional {
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pushdef(`__in_optional_policy') dnl
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$2
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popdef(`__in_optional_policy') dnl
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ifelse(`$3',`',`',`
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} else {
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$3
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')
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}
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',`
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optional {
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pushdef(`__in_optional_policy') dnl
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$1
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popdef(`__in_optional_policy') dnl
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ifelse(`$2',`',`',`
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} else {
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$2
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')
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}
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')
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')
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##############################
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#
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# Determine if we should use the default
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# tunable value as specified by the policy
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# or if the override value should be used
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#
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define(`dflt_or_overr',`ifdef(`$1',$1,$2)')
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##############################
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#
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# Extract booleans out of an expression.
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# This needs to be reworked so expressions
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# with parentheses can work.
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define(`delcare_required_symbols',`
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ifelse(regexp($1, `\w'), -1, `', `dnl
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bool regexp($1, `\(\w+\)', `\1');
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delcare_required_symbols(regexp($1, `\w+\(.*\)', `\1'))dnl
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') dnl
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')
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##############################
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#
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# Tunable declaration
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#
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define(`gen_tunable',`
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ifdef(`self_contained_policy',`
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bool $1 dflt_or_overr(`$1'_conf,$2);
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',`
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# loadable module tunable
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# declaration will go here
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# instead of bool when
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# loadable modules support
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# tunables
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bool $1 dflt_or_overr(`$1'_conf,$2);
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')
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')
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##############################
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#
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# Tunable policy handling
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#
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define(`tunable_policy',`
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ifdef(`self_contained_policy',`
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if (`$1') {
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$2
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ifelse(`$3',`',`',`
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} else {
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$3
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')
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}
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',`
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# structure for tunables
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# will go here instead of a
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# conditional when loadable
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# modules support tunables
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gen_require(`
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delcare_required_symbols(`$1')
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')
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if (`$1') {
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$2
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ifelse(`$3',`',`',`
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} else {
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$3
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')
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}
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')
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')
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