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dracut 005-1
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#!/bin/bash

# if there's no multipath binary, no go.
which multipath >/dev/null 2>&1 || exit 1

[[ $1 = -d ]] && exit 0

. $dracutfunctions
[[ $debug ]] && set -x

is_mpath() {
    [ -e /sys/dev/block/$1/dm/uuid ] || return 1
    [[ $(cat /sys/dev/block/$1/dm/uuid) =~ ^mpath- ]] && return 0
    return 1
}

# Do mpath if we appear to be using it for /
rootdev=$(find_root_block_device)
if [[ $rootdev ]]; then
    check_block_and_slaves is_mpath "$rootdev" && exit 0
fi

exit 1