EXEC 2

EXEC 2 is an interpreted, command procedure control, computer scripting language used by the EXEC 2 Processor supplied with the IBM Virtual Machine/System Product (VM/SP) operating system.[1]

This article is about the scripting language for the VM/CMS operating system. For other uses, see Exec (disambiguation).

EXEC 2 is similar to CMS EXEC with the following enhancements:[2]

  • There is no 8-byte restriction on token length.[3]
  • Statements can be up to 255 characters long.
  • EXEC 2 can issue commands to subcommand environments as well as CMS and CP.
  • EXEC 2 has additional built-in functions.
  • EXEC 2 commands may include subroutines and functions.
  • EXEC 2 has extra debugging facilities.
  • CMS programs can manipulate EXEC 2 variables.

XEDIT Macros

XEDIT Macros are files with filetype XEDIT, whose contents are written using the syntax of CMS EXEC, EXEC 2 or REXX.[4] Like regular EXEC 2 "EXEC" command files, they begin with a "&TRACE" statement,[4] to distinguish them from CMS EXEC files.

History

Written in the 1970s,[5] EXEC 2 was preceded by CMS EXEC and superseded by REXX.

All three command interpreters—CMS EXEC, EXEC 2 and REXX — continue to be supported by the IBM CMS product.

References
  1. Varian, Melinda. "VM AND THE VM COMMUNITY: Past, Present, and Future" (PDF). Retrieved March 14, 2012.
  2. IBM Corporation. "EXEC 2 Processor and CMS EXEC Processor". Retrieved March 14, 2012.
  3. "EXEC 2 Processor and CMS EXEC Processor".
  4. EXEC 2 Reference (PDF). p. 92.
  5. "EXEC 2".
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