rand_printable 291 Bytes
#!/bin/sh

function rand_printable() {
	local ECHO="/bin/echo"
	local TR="/usr/bin/tr"
	local HEAD="/usr/bin/head"

	${ECHO} -n "`</dev/urandom ${TR} -dc \ -\&\(-~ | ${HEAD} -c${1:-512}`"
}

test "X$(basename -- "$0")" = "Xrand_printable" && rand_printable "$@"

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