Execline

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Execline

Designed by	Laurent Bercot
Appeared in	2013
Computational class	Unknown
Reference implementation	[1]
File extension(s)	.sh

execline is a scripting language designed to provide an alternative paradigm for shell scripts.

Introduction

Quoting [2],

execline is the first script language to rely entirely on chain loading. An execline script is a single argv, made up of a chain of programs designed to perform their action then exec() into the next one.

An implementation of execline consists of several dozen independent programs. Each program should be installed to the shell path, so that invoking a builtin execline command is done by running the corresponding program.

Examples

A quine by Paul Jarc using echo to emit code:

#!/command/execlineb -P
define e "#!/command/execlineb -P
define e ${q}${E}${q}
export E $e
define q ${b}${q}
define b ${b}${b}
importas E E
echo $e"
export E $e
define q \"
define b \\
importas E E
echo $e

A quine by Sertonix [3] using only execline commands:

#!/bin/execlineb
export \# 1
define 1 "#!/bin/execlineb
export ${b}# 1
define 1 ${q}${1}${q}
export 1 $1
define q ${b}${q}
define b ${b}${b}
importas 1 1
export 1 $1
dollarat"
export 1 $1
define q \"
define b \\
importas 1 1
export 1 $1
dollarat