#!/usr/bin/python
import os
import sys

def file_convert_encoding(target, from_encoding, to_encoding):
    if os.path.isfile(target):
        buf = file(target, 'rb').read()
        buf = buf.decode(from_encoding).encode(to_encoding)
        file(target, 'wb').write(buf)

target = sys.argv[1]
file_convert_encoding(target, 'utf8', 'sjis',)
os.spawnlp(os.P_WAIT, 'vi', 'vi', target)
file_convert_encoding(target, 'sjis', 'utf8')