#!/bin/sh

#
# Generally, utilities that I expected to exist in POSIX, but don't.
#

uuid() {
	od -xN20 /dev/urandom |
		head -n1 |
		awk '{OFS="-"; print $2$3,$4,$5,$6,$7$8$9}'
}

tmpname() {
	printf '%s/uuid-tmpname with spaces.%s' "${TMPDIR:-/tmp}" "$(uuid)"
}

mkstemp() {
	name="$(tmpname)"
	touch -- "$name"
	printf '%s' "$name"
}

mkdtemp() {
	name="$(tmpname)"
	mkdir -- "$name"
	printf '%s' "$name"
}