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Wakeup script using BASH associative arrays

September 10, 2009

Now that we have associative arrays in BASH 4, we can do cool stuff like:

#!/bin/bash

declare -A MAC_ADDR

MAC_ADDR[myhost01]=00:19:d1:b5:a2:aa
MAC_ADDR[somehost02]=00:30:18:af:f3:47

#------------------------------------

echo_known_hostnames() {
 echo "Known hosts: ${!MAC_ADDR[@]}"
}

[ $# -eq 0 ] && {
 echo "Usage: $(basename $0) hostname"
 echo_known_hostnames
 exit 0
}

HOST="$1"
[ -z "$(grep $HOST <(echo ${MAC_ADDR[@]}))" ] || {
 echo_known_hostnames
 exit 1
}

TARGET=${MAC_ADDR[$HOST]}

[ -n "$TARGET" ] && {
 /usr/sbin/etherwake $TARGET
}

# had to set suid-bit on etherwake
# so that users can use this... ;/

This post was posted on September 10, 2009 in the following sections: Comp&Comm, Life. There is currently 1 comment.

Comments

  1. omega replica says:
    September 4, 2010 @ 08:21 — Reply

    good storzblog luck

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