import os
import sys
import copy
import array
import stat_tarfile

def my_stat(filename):
        class mutable_stat:
                pass
        readonly_statobj = os.lstat(filename)
        mutable_statobj = mutable_stat()
        for attribute in dir(readonly_statobj):
                if not attribute.startswith('_'):
                        value = getattr(readonly_statobj, attribute)
                        setattr(mutable_statobj, attribute, value)
        return mutable_statobj

class generate_file_content:
        def __init__(self, number):
                self._multiplier = 100
                self._multipleno = 0
                self._number = str(number)
                self._buffer = ''

        def read(self, length):
                while self._multipleno < self._multiplier and len(self._buffer) < length:
                        self._buffer += self._number
                        self._multipleno += 1
                if self._buffer == '':
                        return ''
                else:
                        result = self._buffer[:length]
                        self._buffer = self._buffer[length:]
                        return result

def main():
        with stat_tarfile.open(fileobj = sys.stdout, mode = "w|") as tar:
                for number in xrange(100):
                        #string = str(number) * 100
                        fileobj = generate_file_content(number)
                        statobj = my_stat('/etc/passwd')
                        statobj.st_size = len(str(number)) * 100
                        filename = 'file-%d.txt' % number
                        tarinfo = tar.gettarinfo(filename, statobj = statobj)
                        tarinfo.uid = 1000
                        tarinfo.gid = 1000
                        tarinfo.uname = "dstromberg"
                        tarinfo.gname = "dstromberg"
                        tar.addfile(tarinfo, fileobj)

main()

with stat_tarfile.open(fileobj = sys.stdout, mode = "w|") as tar:
    for number in xrange(100):
        fileobj = generate_file_content(number)
        tarinfo = tar.gettarinfo(fileobj=open("/etc/passwd")) 
        tarinfo.name = 'file-%d.txt' % number
        tarinfo.size = len(str(number)) * 100
        tarinfo.uid = 1000
        tarinfo.gid = 1000
        tarinfo.uname = "dstromberg"
        tarinfo.gname = "dstromberg"
        tar.addfile(tarinfo, fileobj)