<b_jonas> slashlearn block device/Block devices are a concession made in Unix to make raw hard disks and magnetic tape have a similar interface to regular files and terminals. Since magnetic tapes can\'t write individual bytes, only entire blocks, the interface isn\'t exactly the same, thus the dreaded dd obs= option was born.

#!/bin/sh
exec perl -e 'open$I,"<","/hackenv/share/mtg/allsets.txt"or die;$/=""; while(<$I>){/\A(?i)\Q$ARGV[0]/ and print}' "$1"