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@ -32,7 +32,7 @@ Icinga 2's init script is installed in `/etc/init.d/icinga2` by default:
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-V [ --version ] show version information
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-l [ --library ] arg load a library
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-I [ --include ] arg add include search directory
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-D [ --define] args define a variable
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-D [ --define] args define a constant
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-c [ --config ] arg parse a configuration file
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-C [ --validate ] exit after validating the configuration
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-x [ --debug ] enable debugging
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@ -50,9 +50,9 @@ Icinga 2's init script is installed in `/etc/init.d/icinga2` by default:
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Instead of loading libraries using the [`library` config directive](#library)
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you can also use the `--library` command-line option.
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#### Variables
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#### Constants
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[Global variables](#global-variables) can be set using the `--define` command-line option.
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[Global constants](#global-constants) can be set using the `--define` command-line option.
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#### Config Include Path
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@ -3,7 +3,7 @@
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> **Note**
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>
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> There is a limited set of special [global variables](#global-variables) which can be re-used and
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> There is a limited set of special [global constants](#global-constants) which can be re-used and
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> also partly overridden such as `IcingaEnableChecks`.
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### <a id="runtime-macros"></a> Runtime Macros
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@ -64,7 +64,7 @@ up macros:
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2. Service object
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3. Host object
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4. Command object
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5. Global macros in the IcingaMacros variable
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5. Global macros in the IcingaMacros constant
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This execution order allows you to define default values for macros in your
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command objects. The `my-ping` command shown above uses this to set default
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@ -262,7 +262,7 @@ when passing credentials to database checks:
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### <a id="configuration-macros"></a> Configuration Macros
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Icinga 2 allows you to define constant variables which can be used in a limited
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Icinga 2 allows you to define constants which can be used in a limited
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scope. For example, constant expressions can reference a pre-defined global constant
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variable and calculate a value for the service check interval.
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@ -276,4 +276,4 @@ Example:
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check_interval = (MyCheckInterval / 2.5)
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}
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More details in the chapter [Constant Expressions](#constant-expressions).
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More details in the chapter [Constant Expressions](#constant-expressions).
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@ -296,21 +296,20 @@ dictionary by exiplicitely overriding their value with `null`.
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services["ping6"] = null
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### <a id="variables"></a> Variables
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### <a id="constants"></a> Constants
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Global variables can be set using the `var` and `const` keywords:
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Global constants can be set using the `const` keyword:
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var VarName = "some value"
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const VarName = "some value"
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The value can be a string, number, array or a dictionary.
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Variables can be set multiple times unless they were introduced using
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the `const` keyword.
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Constants cannot be changed once they are set.
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> **Note**
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>
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> The `set` keyword is an alias for the `var` keyword and is available
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> in order to provide compatibility with older versions. Its use is
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> The `set` and `var` keywords are an alias for `const` and are available
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> in order to provide compatibility with older versions. Their use is
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> deprecated.
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### <a id="constant-expressions"></a> Constant Expressions
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@ -328,7 +327,7 @@ overridden by grouping expressions using parentheses:
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check_interval ((15 * 60) / 2)
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}
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Global variables may be used in constant expressions.
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Global constants may be used in constant expressions.
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var MyCheckInterval = 10m
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@ -1,6 +1,6 @@
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## <a id="global-variables"></a> Global Variables
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## <a id="global-constants"></a> Global Constants
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Icinga 2 provides a number of special global variables:
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Icinga 2 provides a number of special global constants. Some of them can be overriden using the `--define` command line parameter:
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Variable |Description
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--------------------------|-------------------
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@ -209,7 +209,7 @@ int main(int argc, char **argv)
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("version,V", "show version information")
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("library,l", po::value<std::vector<String> >(), "load a library")
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("include,I", po::value<std::vector<String> >(), "add include search directory")
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("define,D", po::value<std::vector<String> >(), "define a variable")
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("define,D", po::value<std::vector<String> >(), "define a constant")
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("config,c", po::value<std::vector<String> >(), "parse a configuration file")
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("no-config,z", "start without a configuration file")
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("validate,C", "exit after validating the configuration")
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@ -203,9 +203,7 @@ variable: variable_decl identifier T_EQUAL value
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}
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ScriptVariable::Ptr sv = ScriptVariable::Set($2, *value);
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if (!$1)
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sv->SetConstant(true);
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sv->SetConstant(true);
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free($2);
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delete value;
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