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Written in the 1970s,^[5] EXEC 2 was preceded by CMS EXEC and superseded by REXX.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

^ Varian, Melinda. "VM AND THE VM COMMUNITY: Past, Present, and Future" (PDF). Retrieved March 14, 2012.
^ IBM Corporation. "EXEC 2 Processor and CMS EXEC Processor". Retrieved March 14, 2012.
^ "EXEC 2 Processor and CMS EXEC Processor".
^ ^a ^b EXEC 2 Reference (PDF). p. 92.
^ "EXEC 2".

External links

[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".

[X2-4] EXEC 2 Reference (PDF). p. 92.

[5] "EXEC 2".

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