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#!/bin/sh
[ "$(id -u)" = 0 ] || exec sudo $0 "$@"
get()
{
btrfs filesystem show / |
sed -Ene 's?^\t*devid +([^ ]+) .* path ([^ ]+)?\1 \2?p'
}
go()
{
set --
found=
while read id path
do
case "$path" in
/dev/ram*) return ;;
/dev/mapper/samizdatcrypt) found=y; continue ;;
*) set -- "$@" "$id"
esac
done
[ $# = 0 ] && return
[ ! "$found" ] && return
btrfs device remove "$@" /
}
get | go
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