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#!/bin/sh
#
# Example showing use of getopt detection and use of GNU enhanced getopt
# to handle arguments containing whitespace.
#
# Written in 2004 by Hoylen Sue <hoylen@hoylen.com>
#
# To the extent possible under law, the author(s) have dedicated all copyright and
# related and neighboring rights to this software to the public domain worldwide.
# This software is distributed without any warranty.
#
# You should have received a copy of the CC0 Public Domain Dedication along with this software.
# If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
PROG=`basename $0`
VERSION=0.1
# Remove this trap if you are doing your own error detection or don't care about errors
trap "echo $PROG: error encountered: aborted; exit 3" ERR
#----------------------------------------------------------------
# Process command line arguments
## Define options: trailing colon means has an argument (customize this: 1 of 3)
SHORT_OPTS=o:vh
LONG_OPTS=output:,verbose,version,help
SHORT_HELP="Usage: $PROG [options] arguments
Options:
-o file output file name
-v show extra information
-h show this help message"
LONG_HELP="Usage: $PROG [options] arguments
Options:
-o | --output file output file name
-v | --verbose show extra information
-h | --help show this help message
--version show version information"
# Detect if GNU Enhanced getopt is available
HAS_GNU_ENHANCED_GETOPT=
if getopt -T >/dev/null; then :
else
if [ $? -eq 4 ]; then
HAS_GNU_ENHANCED_GETOPT=yes
fi
fi
# Run getopt (runs getopt first in `if` so `trap ERR` does not interfere)
if [ -n "$HAS_GNU_ENHANCED_GETOPT" ]; then
# Use GNU enhanced getopt
if ! getopt --name "$PROG" --long $LONG_OPTS --options $SHORT_OPTS -- "$@" >/dev/null; then
echo "$PROG: usage error (use -h or --help for help)" >&2
exit 2
fi
ARGS=`getopt --name "$PROG" --long $LONG_OPTS --options $SHORT_OPTS -- "$@"`
else
# Use original getopt (no long option names, no whitespace, no sorting)
if ! getopt $SHORT_OPTS "$@" >/dev/null; then
echo "$PROG: usage error (use -h for help)" >&2
exit 2
fi
ARGS=`getopt $SHORT_OPTS "$@"`
fi
eval set -- $ARGS
## Process parsed options (customize this: 2 of 3)
while [ $# -gt 0 ]; do
case "$1" in
-o | --output) OUTFILE="$2"; shift;;
-v | --verbose) VERBOSE=yes;;
-h | --help) if [ -n "$HAS_GNU_ENHANCED_GETOPT" ]
then echo "$LONG_HELP";
else echo "$SHORT_HELP";
fi; exit 0;;
--version) echo "$PROG $VERSION"; exit 0;;
--) shift; break;; # end of options
esac
shift
done
## Process remaining arguments and use options (customize this: 3 of 3)
echo "$PROG: DEBUG: option VERBOSE: $VERBOSE"
echo "$PROG: DEBUG: option OUTFILE: $OUTFILE"
if [ $# -gt 0 ]; then
for ARG in "$@"; do
echo "$PROG: DEBUG: argument: $ARG"
done
fi
#EOF
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