Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v8plus / lib / python2.4 / test / test_fcntl.py

#! /usr/bin/env python
"""Test program for the fcntl C module.
  OS/2+EMX doesn't support the file locking operations.
  Roger E. Masse
"""
import struct
import fcntl
import os, sys
from test.test_support import verbose, TESTFN

filename = TESTFN

try:
   os.O_LARGEFILE
except AttributeError:
   start_len = "ll"
else:
   start_len = "qq"

if sys.platform.startswith('atheos'):
   start_len = "qq"

if sys.platform in ('netbsd1', 'Darwin1.2', 'darwin',
                   'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5', 'freebsd6',
                   'bsdos2', 'bsdos3', 'bsdos4',
                   'openbsd', 'openbsd2', 'openbsd3'):
   if struct.calcsize('l') == 8:
       off_t = 'l'
       pid_t = 'i'
   else:
       off_t = 'lxxxx'
       pid_t = 'l'
   lockdata = struct.pack(off_t+off_t+pid_t+'hh', 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)
elif sys.platform in ['os2emx']:
   lockdata = None
else:
   lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
if lockdata:
   if verbose:
       print 'struct.pack: ', repr(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 fcntl with O_NONBLOCK: ', rv

if sys.platform not in ['os2emx']:
   rv = fcntl.fcntl(f.fileno(), fcntl.F_SETLKW, lockdata)
   if verbose:
       print 'String from fcntl with F_SETLKW: ', repr(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)

if sys.platform not in ['os2emx']:
   rv = fcntl.fcntl(f, fcntl.F_SETLKW, lockdata)

f.close()
os.unlink(filename)