#!/bin/tcsh # A small example program for using the new getopt(1) program. # This program will only work with tcsh(1) # An similar program using the bash(1) script language can be found # as parse.bash # Example input and output (from the tcsh prompt): # ./parse.tcsh -a par1 'another arg' --c-long 'wow\!*\?' -cmore -b " very long " # Option a # Option c, no argument # Option c, argument `more' # Option b, argument ` very long ' # Remaining arguments: # --> `par1' # --> `another arg' # --> `wow!*\?' # Note that we had to escape the exclamation mark in the wow-argument. This # is _not_ a problem with getopt, but with the tcsh command parsing. If you # would give the same line from the bash prompt (ie. call ./parse.tcsh), # you could remove the exclamation mark. # This is a bit tricky. We use a temp variable, to be able to check the # return value of getopt (eval nukes it). argv contains the command arguments # as a list. The ':q` copies that list without doing any substitutions: # each element of argv becomes a separate argument for getopt. The braces # are needed because the result is also a list. set temp=(`getopt -s tcsh -o ab:c:: --long a-long,b-long:,c-long:: -- $argv:q`) if ($? != 0) then echo "Terminating..." >/dev/stderr exit 1 endif # Now we do the eval part. As the result is a list, we need braces. But they # must be quoted, because they must be evaluated when the eval is called. # The 'q` stops doing any silly substitutions. eval set argv=\($temp:q\) while (1) switch($1:q) case -a: case --a-long: echo "Option a" ; shift breaksw; case -b: case --b-long: echo "Option b, argument "\`$2:q\' ; shift ; shift breaksw case -c: case --c-long: # c has an optional argument. As we are in quoted mode, # an empty parameter will be generated if its optional # argument is not found. if ($2:q == "") then echo "Option c, no argument" else echo "Option c, argument "\`$2:q\' endif shift; shift breaksw case --: shift break default: echo "Internal error!" ; exit 1 endsw end echo "Remaining arguments:" # foreach el ($argv:q) created problems for some tcsh-versions (at least # 6.02). So we use another shift-loop here: while ($#argv > 0) echo '--> '\`$1:q\' shift end
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