#!/bin/bash
# Original...
# Copyright (c) 2000,2004 Matthias S. Benkmann <article AT winterdrache DOT de>
# You may do everything with this code except misrepresent its origin.
# PROVIDED `AS IS' WITH ABSOLUTELY NO WARRANTY OF ANY KIND!

# Copyright (C) 2014 Steve Youngs <steve@steveyoungs.com>
#  Handle chgrp options and chgrp'ing outside the user's group list.

DAISY_CHAIN=""

for p in $(type -ap chgrp) ; do
    if [ ! $p -ef $0 ]; then
	DAISY_CHAIN=$p
	break
    fi
done

if [ ! -n "$DAISY_CHAIN" ]; then
    echo 1>&2 '***' Cannot find real ${0##*/} command 
    exit 1
fi

if [ $(id -u) == 0 ]; then
    echo 1>&2 '***' $(dirname $0) should not be in root\'s \$PATH
    echo 1>&2 '***' call '"'$DAISY_CHAIN $@'"' directly
    exit 1
fi

# Preserve the command line because we're about to mess with it.
cmdline=$@

# Remove any options so $1 becomes the group name.
while [ -n "$1" ]; do
    case $1 in
	(-*) shift ;;
	(*) break ;;
    esac
done

# If you're not root you can only chgrp to groups you are in, so lets
# find out.
GRP_CHAIN=""
# name or GID?
printf '%d' "$1" &>/dev/null
if [ $? -eq 0 ]; then
    GRP_LIST=$(id -G)
else
    GRP_LIST=$(id -Gn)
fi
for g in ${GRP_LIST}; do
    if [ "$1" == "$g" ]; then
	GRP_CHAIN=$g
	break
    fi
done

if [ -z "$GRP_CHAIN" ]; then
    echo 1>&2 '***' chgrp ${cmdline}
else
    $DAISY_CHAIN ${cmdline} || exit $?
fi

exit 0

# Local variables:
# sh-basic-offset: 4
# End: