shell program - meaning and definition. What is shell program
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What (who) is shell program - definition

COMMAND LINE INTERPRETER FOR VERSION 10 UNIX AND PLAN 9 FROM BELL LABS OPERATING SYSTEMS
Rc shell; Rc (program); Rcsh; Es (Unix shell); Es (Shell); Es shell
  • An rc session

shell program      
¦ noun Computing a program providing an interface between the user and the operating system.
shell program      
A shell program is a basic computer program that provides a framework within which the user can develop the program to suit their own needs. (COMPUTING)
N-COUNT
bandshell         
  • Centreville High School]]. Behind the orchestra is a simple shell.
THEATER
Bandshell; Band shell; Orchestra shell; Acoustical shell; Sound shell
¦ noun chiefly N. Amer. a bandstand in the form of a large concave shell with special acoustic properties.

Wikipedia

Rc

rc (for "run commands") is the command line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems. It resembles the Bourne shell, but its syntax is somewhat simpler. It was created by Tom Duff, who is better known for an unusual C programming language construct ("Duff's device").

A port of the original rc to Unix is part of Plan 9 from User Space. A rewrite of rc for Unix-like operating systems by Byron Rakitzis is also available but includes some incompatible changes.

Rc uses C-like control structures instead of the original Bourne shell's ALGOL-like structures, except that it uses an if not construct instead of else, and has a Bourne-like for loop to iterate over lists. In rc, all variables are lists of strings, which eliminates the need for constructs like "$@". Variables are not re-split when expanded. The language is described in Duff's paper.