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<P><FONT SIZE="5">8.6 Options</FONT><BR>
<P>The FunnelWeb shell maintains three sets of command
line options.
<P> <OL>
<LI> The set of options resulting from applying the
operating system level command line arguments to the default
option settings.
<LI> A set of shell options that prevail during the shell
invocation.
<LI> The set of option values active during a particular
invocation of FunnelWeb proper.
</OL>
<P>When FunnelWeb is invoked from the operating system
with just <SAMP>+F</SAMP>, only the first of these three sets
comes into existence. If the user invokes the FunnelWeb
shell, the shell options come into existence and are
initialized with the value of the first set. These shell
options are used as the default for all subsequent
<SAMP>fw</SAMP> commands. However, they can be altered using
the script command <SAMP>set</SAMP>. If a <SAMP>fw</SAMP> command
executed in a shell contains additional command line
options, these override the shell options for that run, but
do not change the shell options. An example follows:
<P>
<PRE>
$ fw +k +t ! Original invocation from OS.
! Options default with "+t".
FunnelWeb>fw sloth ! Equivalent to fw sloth +t.
FunnelWeb>set -l ! Change the l shell option.
FunnelWeb>fw sloth +q ! Equiv to fw sloth +t -l +q.
FunnelWeb>fw sloth ! Equiv to fw sloth +t -l.
</PRE>
<P>The existence of the shell option set means that the
user can set up a set of defaults to be applied to all
<SAMP>fw</SAMP> commands issued within the shell.
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