#!/usr/local/bin/python

import tarfile

import sys
import os

print "Python Version:", sys.version
print "Executable:", sys.executable
print "Tarfile Version: ", tarfile.version

myscript = sys.argv[0]

dummyfile = myscript

def run_pathlength_test(posix=True, maxlen=256):
    loops = (maxlen - len("fooo")) / len("tmp/") ## defauls to 63
    
    for i in range(int(loops)): 
        dir = "tmp/" * i
        arcname =  dir + "fooo" 
        try:
            tar = tarfile.open("/tmp/tmp.tar", "w:gz")
            tar.posix = posix
            tar.debug = 0 # set 3 for debug output
            tar.add(myscript, arcname)
            tar.close()
            
            ## reopen the tarfile, this way the tarfile-member list
            ## will be reinitialized, restoring the file-name from
            ## tarinfo.prefix and tarinfo.name, otherwise tarfile.getnames()
            ## returns invalid filename-list
            
            tar = tarfile.open("/tmp/tmp.tar", "r")
            if arcname not in tar.getnames():
                print "TarFile pathlength check failed, do not use!!"
                print "failed for %s (length %d, posix=%s)" % (arcname, len(arcname), str(posix))
                return

            ## check getmember() operation, might throw exception
            tar.getmember (arcname)
            tar.close()
        except Exception,e:
            print "TarFile pathlength check failed, do not use!!"
            print "failed for %s (length %d, posix=%s) with %s" % (arcname, len(arcname), str(posix), str(e)) 
            return 

    print "Tarfile module (posix=%s) is Ok" % posix        

run_pathlength_test(posix=True, maxlen=256)
run_pathlength_test(posix=False, maxlen=1024)