#!/usr/bin/env python2

import sys

try:
    needle = sys.argv[1]
    haystack = sys.argv[2]
except IndexError:
    print >>sys.stderr, "Usage: %s needle haystack" % sys.argv[0]
    sys.exit(1)


f = open(needle)
magic = f.read(1024)
f.close()

chunk_size = 32768
f = open(haystack)
count = 0
buf = ""
while True:
    newbuf = f.read(chunk_size)
    if not newbuf:
        break
    buf += newbuf
    pos = buf.find(magic)
    if pos >= 0:
        print "found", count + pos
    count += len(buf) - len(magic)
    buf = buf[-len(magic):]
f.close()