base.sh: support randoms in shells with 32-bit math

	exists $MD5 || MD5=md5

}

setup_random()

{

	[ -n "$RCUT" ] && return

	RCUT="cut -c 1-17"

	# some shells can operate with 32 bit signed int

	[ $((0x100000000)) = 0 ] && RCUT="cut -c 1-9"

}

random()

{

	# $1 - min, $2 - max

	local r rs

	setup_md5

	setup_random

	if [ -c /dev/urandom ]; then

		read rs </dev/urandom

	else

		rs="$RANDOM$RANDOM$(date)"

	fi

	# shells use signed int64

	r=1$(echo $rs | $MD5 | sed 's/[^0-9]//g' | cut -c 1-17)

	r=1$(echo $rs | $MD5 | sed 's/[^0-9]//g' | $RCUT)

	echo $(( ($r % ($2-$1+1)) + $1 ))

}