Input validator

Overview

An Input format validator is a program that tests input data for correctness.

A validator program must be an application (executable or interpreted) capable of being invoked with a command line call. The details of this invocation are described below.

Invocation

When invoked the input format validator will get the input file on stdin.

The validator should be possible to use as follows on the command line:

 ./validator < inputfile

Output

The input format validator may output debug information on stdout and stderr. This information may be displayed to the user upon invocation of the validator.

Exit codes

The input format validator must exit with code 42 on successful validation. Any other exit code means that the input file could not be confirmed as valid.