path: root/bin/rndl

#!/bin/sh
# Print a random line from argument files
if [ "$#" -eq 0 ] ; then
    printf >&2 'rndl: Need at least one filename\n'
    exit 1
fi
lc=$(sed -- '$=;d' "$@") || exit
ri=$(rndi 1 "$lc") || exit
sed -- "$ri"'!d' "$@"