32or64

#!/bin/bash
# (c) 2020 Leif Sawyer
# License: GPL 3.0 (see https:/akhepcat/)
# Permanent home:  https:/akhepcat/Miscellaneous/
# Direct download: https://raw.githubusercontent.com/akhepcat/Miscellaneous/master/32or64
# 

#  Prints either 32 or 64,  or 'error'
MACH=$(uname -m)
if [[ -z ${MACH} || ${MACH} == "unknown" ]]
then
	# Try some alternatives

	# ARM
	if [ -n "$(which getconf)" ]
	then
		MACH=$(getconf LONG_BIT)
	elif [ -n "$(which dpkg)" ]
	then
		MACH=$(dpkg --print-architecture)
	fi
fi
case "${MACH}" in
	*86) BITS=32
		;;
	arm) BITS=32
		;;
	armv6l) BITS=32
		;;
	armv7l) BITS=32
		;;
	aarch) BITS=32
		;;
	x86_64) BITS=64
		;;
	amd64) BITS=64
		;;
	arm64) BITS=64
		;;
	aarch64) BITS=64
		;;
	other)  BITS="error parsing mach: ${MACH}"
		;;
esac
echo "${BITS}"