#!/bin/sh
#
# 2012 Sébastien Gross <seb•ɑƬ•chezwam•ɖɵʈ•org>
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# List all network interfaces in explorer/ifaces. One interface per line.
#
# If your OS is not supported please provide a ifconfig output
#

# Use ip, if available
if command -v ip >/dev/null; then
    ip -o link show | sed -n 's/^[0-9]\+: \(.\+\): <.*/\1/p'
    exit 0
fi

if ! command -v ifconfig >/dev/null; then
   # no ifconfig, nothing we could do
   exit 0
fi

uname_s="$(uname -s)"
REGEXP='s/^(.*)(:[[:space:]]*flags=|Link encap).*/\1/p'

case "$uname_s" in
    Darwin)
	ifconfig -a | sed -n -E "$REGEXP"
	;;
    Linux|*BSD)
	ifconfig -a | sed -n -r "$REGEXP"
	;;
    *)
	echo "Unsupported ifconfig output for $uname_s" >&2
	exit 1
	;;
esac