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]

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Written in the 1970s,[5], EXEC 2 was preceded by CMS EXEC and superseded by REXX.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

External links

• EXEC 2 Processor, CMS User's Guide, z/VM Version 5 Release 1.0, Program Number 5741-A05, Document Number SC24-6079-00, First Edition September 2004
• REX - A Command Programming Language, REX First Public Paper, SHARE 56, 18 Feb 1981