2.1 Invoking FunnelWeb
2.1 Invoking FunnelWeb
When a user invokes FunnelWeb at the operating system
command level, the user must provide a command line
instructing FunnelWeb what to do. Typically an operating
system command line consists of a 
  indicating that a
particular program should be run, followed by a list of options.
For example:
1 Introduction
rename file1 file2
2 Interface
In this case, the verb is rename and the command line options
3 Scanner
are file1 file2.
4 Parser
Operating systems differ greatly in the depth with which they
5 Analyser
process their command lines, ranging from systems that simply
6 Tangle
pass the entire command line string to the invoked program
7 Weave
(e.g. MSDOS) through to systems that perform complete
8 Shell
command line parsing (e.g. OpenVMS). Syntax conventions
9 Commands
vary considerably.
10 Glossary
So as to achieve maximum portability and consistency of
11 References
invocation across different platforms, FunnelWeb reads its
command line as a raw string and performs all its own parsing.
This is portable because, at the very least, all operating systems
allow invoked programs access to the raw command line.
The command verb used to invoke FunnelWeb should be "
FunnelWeb_verb =  "fw"
If this verb is not available, some alternatives are "
", and "
". The verbs web or fweb should be
avoided as they are the names of other literate programming
Copyright   Ross N. Williams 1992,1999. All rights
http://www.ross.net/funnelweb/reference/interface_invoking.html [3/3/2000 10:48:38 PM]

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