Generic Operating System Services

The modules described in this chapter provide interfaces to operating system features that are available on (almost) all operating systems, such as files and a clock. The interfaces are generally modelled after the or C interfaces but they are available on most other systems as well. Here's an overview:
os
— Miscellaneous OS interfaces.
time
— Time access and conversions.
getopt
— Parser for command line options.
tempfile
— Generate temporary file names.