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##### 8.5.4.18 Pragma Import

Two kinds of subprograms are allowed in the configuration language. A main procedure is used as a partition Main attribute and a function is used as a partition Host attribute.

         PROCEDURE_DECLARATION ::=
              procedure PROCEDURE_IDENTIFIER;
         FUNCTION_DECLARATION ::=
              function FUNCTION_IDENTIFIER
                 (PARAMETER_IDENTIFIER : [in] String)
                  return String;

The function can be an Ada function (default) or a shell script. To import a shell script, the pragma Import must be used:

         PRAGMA ::=
            pragma Import
               ([Entity        =>] FUNCTION_IDENTIFIER,
                [Convention    =>] CONVENTION_LITERAL,
                [External_Name =>] STRING_LITERAL);

         pragma Import (Best_Node, Shell, "best-node");

In this case, the PCS invokes the shell script with the partition name as a command line argument. The shell script is supposed to return the partition host-name (see Partition Attribute Host).