mirror of https://github.com/python/cpython
62 lines
1.6 KiB
Python
Executable File
62 lines
1.6 KiB
Python
Executable File
#! /usr/bin/env python
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"""Test program for the fcntl C module.
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OS/2+EMX doesn't support the file locking operations.
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Roger E. Masse
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"""
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import struct
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import fcntl
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import os, sys
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from test_support import verbose, TESTFN
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filename = TESTFN
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try:
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os.O_LARGEFILE
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except AttributeError:
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start_len = "ll"
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else:
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start_len = "qq"
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if sys.platform.startswith('atheos'):
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start_len = "qq"
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if sys.platform in ('netbsd1', 'Darwin1.2', 'darwin',
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'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
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'bsdos2', 'bsdos3', 'bsdos4',
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'openbsd', 'openbsd2', 'openbsd3'):
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lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, fcntl.F_WRLCK, 0)
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elif sys.platform in ['aix3', 'aix4', 'hp-uxB', 'unixware7']:
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lockdata = struct.pack('hhlllii', fcntl.F_WRLCK, 0, 0, 0, 0, 0, 0)
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elif sys.platform in ['os2emx']:
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lockdata = None
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else:
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lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
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if lockdata:
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if verbose:
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print 'struct.pack: ', `lockdata`
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# the example from the library docs
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f = open(filename, 'w')
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rv = fcntl.fcntl(f.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)
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if verbose:
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print 'Status from fnctl with O_NONBLOCK: ', rv
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if sys.platform not in ['os2emx']:
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rv = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW, lockdata)
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if verbose:
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print 'String from fcntl with F_SETLKW: ', `rv`
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f.close()
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os.unlink(filename)
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# Again, but pass the file rather than numeric descriptor:
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f = open(filename, 'w')
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rv = fcntl.fcntl(f, fcntl.F_SETFL, os.O_NONBLOCK)
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if sys.platform not in ['os2emx']:
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rv = fcntl.fcntl(f, fcntl.F_SETLKW, lockdata)
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f.close()
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os.unlink(filename)
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