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https://github.com/python/cpython
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Tip revision: 8d21aa21f2cbc6d50aab3f420bb23be1d081dac4 authored by Benjamin Peterson on 19 April 2020, 21:13:39 UTC
Add empty 2.7.18 NEWS file.
Tip revision: 8d21aa2
tf_inherit_check.py
# Helper script for test_tempfile.py.  argv[2] is the number of a file
# descriptor which should _not_ be open.  Check this by attempting to
# write to it -- if we succeed, something is wrong.

import sys
import os

verbose = (sys.argv[1] == 'v')
try:
    fd = int(sys.argv[2])

    try:
        os.write(fd, "blat")
    except os.error:
        # Success -- could not write to fd.
        sys.exit(0)
    else:
        if verbose:
            sys.stderr.write("fd %d is open in child" % fd)
        sys.exit(1)

except StandardError:
    if verbose:
        raise
    sys.exit(1)
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