The following code demonstrates how to set an environment variable in
SAS's parent shell when doing batch processing in UNIX:

From the UNIX shell:

   export envar=$(sas myprog.sas)
   echo $envar

Here are the contents of myprog.sas:

   %let macrovar=SAS process is now complete;
   data _null_;
      file stdout;
      put "&macrovar";

This example sets the environment variable "envar" to the phrase
"SAS process is now complete".

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