ARX subprograms process some input to produce a script.

An SHDAT program processes byte streams with the specified chunking to produce a script.

A TMPX program archives streams to produce a script that unpacks the file data in a temporary location and runs the command with the attached environment information in that location. The command may be any executable file contents, modulo architectural compatibility. It is written along side the temporary work location, to ensure it does not collide with any files in the archive. The two boolean flags determine when to delete the temporary directory. The first flag determines whether or not to delete successful (exit code zero) runs; the second determines whether or not to delete failed (exit code non-zero) runs.

Valid shell string values contain any byte but null.

Valid shell variable names consist of a leading letter or underscore and then any number of letters, underscores or digits.

Handled styles of Tar archive.

Scan a lazy ByteString for file magic.