6. 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 Unix 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.
 
- errno
- -- Standard errno system symbols.
 
- glob
- -- Unix shell style pathname pattern expansion.
 
- fnmatch
- -- Unix shell style pathname pattern matching.
 
- locale
- -- Internationalization services.
 
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