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', 'freebsd2', 'freebsd3', 'bsdos2', 'bsdos3'):
  20     lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, FCNTL.F_WRLCK, 0)
  21 elif sys.platform in ['aix3', 'aix4']:
  22     lockdata = struct.pack('hhlllii', FCNTL.F_WRLCK, 0, 0, 0, 0, 0, 0)
  23 else:
  24     lockdata = struct.pack('hhllhh', FCNTL.F_WRLCK, 0, 0, 0, 0, 0)
  25 if verbose:
  26     print 'struct.pack: ', `lockdata`
  27
  28 rv = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW, lockdata)
  29 if verbose:
  30     print 'String from fcntl with F_SETLKW: ', `rv`
  31
  32 f.close()
  33 os.unlink(filename)