+
+get_mac ()
+{
+ mac=""
+
+ for adaptor in /sys/class/net/*
+ do
+ status="$(cat ${adaptor}/iflink)"
+
+ if [ "${status}" -eq 2 ]
+ then
+ mac="$(cat ${adaptor}/address)"
+ mac="$(echo ${mac} | sed 's/:/-/g' | tr '[a-z]' '[A-Z]')"
+ fi
+ done
+
+ echo ${mac}
+}
+
+is_luks()
+{
+ devname="${1}"
+ if [ -x /sbin/cryptsetup ]
+ then
+ /sbin/cryptsetup isLuks "${devname}" 2>/dev/null || ret=${?}
+ return ${ret}
+ else
+ return 1
+ fi
+
+}
+
+removable_dev ()
+{
+ output_format="${1}"
+ want_usb="${2}"
+ ret=
+
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
+ do
+ dev_ok=
+ if [ "$(cat ${sysblock}/removable)" = "1" ]
+ then
+ if [ -z "${want_usb}" ]
+ then
+ dev_ok="yes"
+ else
+ if readlink ${sysblock} | grep -q usb
+ then
+ dev_ok="yes"
+ fi
+ fi
+ fi
+
+ if [ "${dev_ok}" = "yes" ]
+ then
+ case "${output_format}" in
+ sys)
+ ret="${ret} ${sysblock}"
+ ;;
+ *)
+ devname=$(sys2dev "${sysblock}")
+ ret="${ret} ${devname}"
+ ;;
+ esac
+ fi
+ done
+
+ echo "${ret}"
+}
+
+removable_usb_dev ()
+{
+ output_format="${1}"
+
+ removable_dev "${output_format}" "want_usb"
+}
+
+non_removable_dev ()
+{
+ output_format="${1}"
+ ret=
+
+ for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
+ do
+ if [ "$(cat ${sysblock}/removable)" = "0" ]
+ then
+ case "${output_format}" in
+ sys)
+ ret="${ret} ${sysblock}"
+ ;;
+ *)
+ devname=$(sys2dev "${sysblock}")
+ ret="${ret} ${devname}"
+ ;;
+ esac
+ fi
+ done
+
+ echo "${ret}"
+}