#!/bin/bash # A small example program for using the new getopt(1) program. # This program will only work with bash(1) # An similar program using the tcsh(1) script language can be found # as parse.tcsh # Example input and output (from the bash prompt): # ./parse.bash -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 use `"$@"' to let each command-line parameter expand to a # separate word. The quotes around `$@' are essential! # We need TEMP as the `eval set --' would nuke the return value of getopt. TEMP=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \ -n 'example.bash' -- "$@"` if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi # Note the quotes around `$TEMP': they are essential! eval set -- "$TEMP" while true ; do case "$1" in -a|--a-long) echo "Option a" ; shift ;; -b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;; -c|--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. case "$2" in "") echo "Option c, no argument"; shift 2 ;; *) echo "Option c, argument \`$2'" ; shift 2 ;; esac ;; --) shift ; break ;; *) echo "Internal error!" ; exit 1 ;; esac done echo "Remaining arguments:" for arg do echo '--> '"\`$arg'" ; done
