Lib/dos-8x3/test_fcn.py

   1 #! /usr/bin/env python
   2 """Test program for the fcntl C module.
   3    Roger E. Masse
   4 """
   5 import struct
   6 import fcntl
   7 import FCNTL
   8 import os, sys
   9 from test_support import verbose
  10
  11 filename = '/tmp/delete-me'
  12
  13 # the example from the library docs
  14 f = open(filename,'w')
  15 rv = fcntl.fcntl(f.fileno(), FCNTL.F_SETFL, os.O_NONBLOCK)
  16 if verbose:
  17     print 'Status from fnctl with O_NONBLOCK: ', rv
  18
  19 if sys.platform in ('netbsd1',
  20                     'freebsd2', 'freebsd3',
  21                     'bsdos2', 'bsdos3', 'bsdos4'):
  22     lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, FCNTL.F_WRLCK, 0)
  23 elif sys.platform in ['aix3', 'aix4']:
  24     lockdata = struct.pack('hhlllii', FCNTL.F_WRLCK, 0, 0, 0, 0, 0, 0)
  25 else:
  26     lockdata = struct.pack('hhllhh', FCNTL.F_WRLCK, 0, 0, 0, 0, 0)
  27 if verbose:
  28     print 'struct.pack: ', `lockdata`
  29
  30 rv = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW, lockdata)
  31 if verbose:
  32     print 'String from fcntl with F_SETLKW: ', `rv`
  33
  34 f.close()
  35 os.unlink(filename)