import os
import sys
import logging

class DosDisk:
    drive= "a:"
    mformat= "mformat"
    mmkdir= "mmd"
    mcopy= "mcopy"
    mdir= "mdir"

    class DiskError( Exception):
        pass

    def __init__(self, drive = None):
        if drive is not None:
            self.drive = drive
    def system(self, command):
        logging.warning( command)
        code= os.system( command)
        if code:
            raise DosDisk.DiskError( "'%s' status=%x"%(command, code))
    def format(self):
        command= self.mformat+" "+self.drive
        self.system( command)
    def copy(self, filename, targetpath = None):
        if targetpath is None:
            targetpath= filename
        command= self.mcopy+" '"+filename+"' '"+self.drive+targetpath+"'"
        self.system( command)
    def mkdir(self, targetpath):
        command= self.mmkdir+" '"+self.drive+targetpath+"'"
        self.system( command)
    def dir(self, targetpath = None):
        if targetpath is not None:
            command= self.mmkdir+" '"+self.drive+targetpath+"'"
        else:
            command= self.mmkdir+" "+self.drive
        self.system( command)

    def devdevice(self):
        if self.drive == "a:":
            return "/dev/fd0"
        if self.drive == "b:":
            return "/dev/fd1"
        raise DiskError("no /dev/device for "+self.drive);
    def grubdevice(self):
        if self.drive == "a:":
            return "(fd0)"
        if self.drive == "b:":
            return "(fd1)"
        raise DiskError("no grub device for "+self.drive);
        
if __name__ == "__main__":
    if len( sys.argv) > 1:
        DosDisk().dir(sys.argv[1])
    else:
        DosDisk().dir()