# Try to make a random temp directory

# Get a random seed from rnds(1df); if it's empty, that's still workable
seed=$(rnds)

# Build the intended directory name, with the last element a random integer
# from 1..2^31
dn=${TMPDIR:-/tmp}/${1:-mktd}.$$.$(rndi 1 2147483648 "$seed")

# Create the directory and print its name if successful
mkdir -m 700 -- "$dn" && printf '%s\n' "$dn"