1 # Helper script for test_tempfile.py.  argv[2] is the number of a file

     2 # descriptor which should _not_ be open.  Check this by attempting to

     3 # write to it -- if we succeed, something is wrong.

     4 

     5 import sys

     6 import os

     7 

     8 verbose = (sys.argv[1] == 'v')

     9 try:

    10     fd = int(sys.argv[2])

    11 

    12     try:

    13         os.write(fd, "blat")

    14     except os.error:

    15         # Success -- could not write to fd.

    16         sys.exit(0)

    17     else:

    18         if verbose:

    19             sys.stderr.write("fd %d is open in child" % fd)

    20         sys.exit(1)

    21 

    22 except StandardError:

    23     if verbose:

    24         raise

    25     sys.exit(1)