#!/usr/bin/env tsh
:
: tsh - " Force sh(1), csh(1), and other shells to exit w/ error! " <'' ;;;
:
: "  @(#)$Id: 3965f0f289b8a34902c620ea74e1e20d7e9e5040 $  "
:
: "  The author of this file, J.A. Neitzel <jan (at) etsh (dot) io>,  "
: "  hereby grants it to the public domain.                           "
:

:
: "  Simulate a C-like switch with if(1) and goto(1).  "
:
: "  usage: switch [-a | -b | -n | -q | -v]  "
:

: " Check for fatal error. "
: >>$0'' <'' ; : >>$1'' <'' ; killer $0 switch

: " Evaluate which, if any, option is specified. "
if X$1 = X-a -o \
   X$1 = X-b -o \
   X$1 = X-n -o X$1 = X-q -o X$1 = X-v goto $1

	goto default

: -a
	echo case label: $1
	:
	: " Insert any number of command lines needed to accomplish the "
	: " desired action(s) for this option.                          "
	:
	goto break

: -b
	echo case label: $1
	:
	: " Insert any number of command lines needed to accomplish the "
	: " desired action(s) for this option.                          "
	:
	goto break

: -n - fallthrough
: -q - ...
: -v
	echo case label: $1
	:
	: " Insert any number of command lines needed to accomplish the "
	: " desired action(s) for the -n, -q, or -v option.             "
	:
	goto break

: default
	if X$1 != X if { exit } pusage $0 '"[-a | -b | -n | -q | -v]"'
	echo default label: No option specified
	: fallthrough

: break