73 lines
1.7 KiB
Bash
Executable file
73 lines
1.7 KiB
Bash
Executable file
#!/bin/bash
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##
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# Send wake on lan packages to the LAN network
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#
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# includes MAC lookup via DNS and ARP
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#
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# @copyright 2012 Steffen Vogel
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# @license http://www.gnu.org/licenses/gpl.txt GNU Public License
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# @author Steffen Vogel <info@steffenvogel.de>
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# @link http://www.steffenvogel.de/
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##
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##
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# This script is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# any later version.
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#
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# This script is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this script. If not, see <http://www.gnu.org/licenses/>.
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##
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IP_REGEX="[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}"
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E_BADARGS=65
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if [[ ! -n "$1" ]]; then
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echo "Usage: $(basename $0) HOST"
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exit $E_BADARGS
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fi
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if [[ $1 =~ ${IP_REGEX} ]]; then
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IP=$1
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else
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IP=$(dig +short $1 | head -n1)
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if [[ -z ${IP} ]]; then
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echo "failed to lookup ip"
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exit 4
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else
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echo "$1 has ip: ${IP}"
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fi
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fi
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# do a ping to trigger ARP request
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ping -c1 -q ${IP} &>/dev/null
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if [[ $? -eq 0 ]]; then
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echo "host is alive!"
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# exit 2
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fi
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MAC=$(grep "^${IP}\ " /proc/net/arp | awk '{print $4}')
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if [[ -z ${MAC} ]]; then
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echo "no mac found!"
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exit 1
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fi
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echo "$1 has mac: ${MAC}"
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if [[ $(id -un) != "root" ]]; then
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echo "$(basename $0) requires root privileges!"
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exit 3
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fi
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etherwake ${MAC}
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echo "wol packet has been sent"
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