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- #! /usr/bin/env python
- """Test program for the fcntl C module.
- Roger E. Masse
- """
- import struct
- import fcntl
- import os, sys
- from test_support import verbose, TESTFN
-
- filename = TESTFN
-
- try:
- os.O_LARGEFILE
- except AttributeError:
- start_len = "ll"
- else:
- start_len = "qq"
-
- if sys.platform in ('netbsd1', 'Darwin1.2', 'darwin',
- 'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
- 'bsdos2', 'bsdos3', 'bsdos4',
- 'openbsd', 'openbsd2', 'openbsd3'):
- lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, fcntl.F_WRLCK, 0)
- elif sys.platform in ['aix3', 'aix4', 'hp-uxB', 'unixware7']:
- lockdata = struct.pack('hhlllii', fcntl.F_WRLCK, 0, 0, 0, 0, 0, 0)
- else:
- lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
- if verbose:
- print 'struct.pack: ', `lockdata`
-
-
- # the example from the library docs
- f = open(filename, 'w')
- rv = fcntl.fcntl(f.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
- if verbose:
- print 'Status from fnctl with O_NONBLOCK: ', rv
-
- rv = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW, lockdata)
- if verbose:
- print 'String from fcntl with F_SETLKW: ', `rv`
-
- f.close()
- os.unlink(filename)
-
-
- # Again, but pass the file rather than numeric descriptor:
- f = open(filename, 'w')
- rv = fcntl.fcntl(f, fcntl.F_SETFL, os.O_NONBLOCK)
-
- rv = fcntl.fcntl(f, fcntl.F_SETLKW, lockdata)
-
- f.close()
- os.unlink(filename)
-