#!/bin/bash

[ -z $1 ]||[ `expr length $1` -gt 6 ] && { cat << !
'grepfd': A DOS-floppy searcher (no mounting required)
NOTE: only the root directory of the floppy will be searched!
Files in subdirectories will not show up...

Usage: grepfd <first_6-or-less_characters_of_the_file_name>

!
exit
}

STR=$(echo $1|tr a-z A-Z)

# We'll read the first 16k of the floppy, then skip over the first 9k 
# of that to avoid tripping on any text in the boot record and the FATs.
# Once we blow out the NULs, the VFAT filenames actually become readable.

[ -z "`head -c 16k /dev/fd0|tail -c 7k|tr -d [:cntrl:]|grep $STR`" ] \
&& echo "Not here." || echo "Found it!"