test_fcntl.py revision 16dffdca1a6a98a9b44f6d0560e8a85c1018c4fb 
1#! /usr/bin/env python
2"""Test program for the fcntl C module.
3   Roger E. Masse
4"""
5import struct
6import fcntl
7import FCNTL
8import os
9from test_support import verbose
10
11filename = '/tmp/delete-me'
12
13# the example from the library docs
14f = open(filename,'w')
15rv = fcntl.fcntl(f.fileno(), FCNTL.F_SETFL, FCNTL.FNDELAY)
16if verbose:
17    print 'Status from fnctl with O_NDELAY: ', rv
18
19lockdata = struct.pack('hhllhh', FCNTL.F_WRLCK, 0, 0, 0, 0, 0)
20if verbose:
21    print 'struct.pack: ', `lockdata`
22
23rv = fcntl.fcntl(f.fileno(), FCNTL.F_SETLKW, lockdata)
24if verbose:
25    print 'String from fcntl with F_SETLKW: ', `rv`
26
27f.close()
28os.unlink(filename)
29