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  from test.support import SuppressCrashReport
       8  
       9  with SuppressCrashReport():
      10      verbose = (sys.argv[1] == 'v')
      11      try:
      12          fd = int(sys.argv[2])
      13  
      14          try:
      15              os.write(fd, b"blat")
      16          except OSError:
      17              # Success -- could not write to fd.
      18              sys.exit(0)
      19          else:
      20              if verbose:
      21                  sys.stderr.write("fd %d is open in child" % fd)
      22              sys.exit(1)
      23  
      24      except Exception:
      25          if verbose:
      26              raise
      27          sys.exit(1)