PARSE SOURCE

<PARSE SOURCE returns 3 tokens with the following information:   

 1. token: Operating system 
    This can be OS/2, TSO, CMS or any other operating system with a REXX 
    interpreter. (see Writing OS independent programs for an example for 
    using this value) 

 2. token: call type 
    This is COMMAND if the REXX program was called from the command line, 
    or SUBROUTINE if the REXX program was called from another REXX 
    program. (see Parameter for a REXX program for an example for using 
    this value) 

 3. token: fully qualified name of the source file 
    Note for OS/2 REXX: If this token only contains the name of the REXX 
    program without the path, the REXX program is in the macro space. 
 

 Example REXX program: 

  
 /* sample for using PARSE SOURCE                                      */
 
   parse source operatingSystem commandType sourceFileName
 
   say "The Operating system is <" || operatingSystem || ">."
   say "The call type is <" || commandType || ">."
   say "The name of the source file is <" || sourceFileName || ">."
 

 (see also Get the invocation syntax)