Linux ip-148-66-134-25.ip.secureserver.net 3.10.0-1160.119.1.el7.tuxcare.els11.x86_64 #1 SMP Sun Nov 3 09:06:59 UTC 2024 x86_64
Apache
: 148.66.134.25 | : 18.119.122.69
66 Domain
8.0.30
amvm
www.github.com/MadExploits
Terminal
AUTO ROOT
Adminer
Backdoor Destroyer
Linux Exploit
Lock Shell
Lock File
Create User
CREATE RDP
PHP Mailer
BACKCONNECT
UNLOCK SHELL
HASH IDENTIFIER
CPANEL RESET
BLACK DEFEND!
README
+ Create Folder
+ Create File
/
usr /
share /
doc /
python-docs-2.7.5 /
html /
library /
[ HOME SHELL ]
Name
Size
Permission
Action
2to3.html
49.27
KB
-rw-r--r--
__builtin__.html
10.26
KB
-rw-r--r--
__future__.html
13.79
KB
-rw-r--r--
__main__.html
7.05
KB
-rw-r--r--
_winreg.html
59.21
KB
-rw-r--r--
abc.html
23.9
KB
-rw-r--r--
aepack.html
13.16
KB
-rw-r--r--
aetools.html
14.91
KB
-rw-r--r--
aetypes.html
18.88
KB
-rw-r--r--
aifc.html
22.4
KB
-rw-r--r--
al.html
17.34
KB
-rw-r--r--
allos.html
33.72
KB
-rw-r--r--
anydbm.html
16.33
KB
-rw-r--r--
archiving.html
9.26
KB
-rw-r--r--
argparse.html
237.62
KB
-rw-r--r--
array.html
29.29
KB
-rw-r--r--
ast.html
34.98
KB
-rw-r--r--
asynchat.html
31.43
KB
-rw-r--r--
asyncore.html
36.51
KB
-rw-r--r--
atexit.html
16.8
KB
-rw-r--r--
audioop.html
31.36
KB
-rw-r--r--
autogil.html
8.19
KB
-rw-r--r--
base64.html
19.67
KB
-rw-r--r--
basehttpserver.html
34.04
KB
-rw-r--r--
bastion.html
11.04
KB
-rw-r--r--
bdb.html
36.68
KB
-rw-r--r--
binascii.html
20.67
KB
-rw-r--r--
binhex.html
10.58
KB
-rw-r--r--
bisect.html
23.24
KB
-rw-r--r--
bsddb.html
26.43
KB
-rw-r--r--
bz2.html
26.08
KB
-rw-r--r--
calendar.html
37.79
KB
-rw-r--r--
carbon.html
48.94
KB
-rw-r--r--
cd.html
27.96
KB
-rw-r--r--
cgi.html
49.92
KB
-rw-r--r--
cgihttpserver.html
13.1
KB
-rw-r--r--
cgitb.html
11.41
KB
-rw-r--r--
chunk.html
14.66
KB
-rw-r--r--
cmath.html
25.63
KB
-rw-r--r--
cmd.html
26.09
KB
-rw-r--r--
code.html
24.58
KB
-rw-r--r--
codecs.html
100.64
KB
-rw-r--r--
codeop.html
14.84
KB
-rw-r--r--
collections.html
133.96
KB
-rw-r--r--
colorpicker.html
7.52
KB
-rw-r--r--
colorsys.html
11.04
KB
-rw-r--r--
commands.html
14.36
KB
-rw-r--r--
compileall.html
16.83
KB
-rw-r--r--
compiler.html
67.75
KB
-rw-r--r--
configparser.html
62.13
KB
-rw-r--r--
constants.html
12.83
KB
-rw-r--r--
contextlib.html
19.39
KB
-rw-r--r--
cookie.html
39.07
KB
-rw-r--r--
cookielib.html
83.82
KB
-rw-r--r--
copy.html
12.19
KB
-rw-r--r--
copy_reg.html
13.76
KB
-rw-r--r--
crypt.html
10.04
KB
-rw-r--r--
crypto.html
7.59
KB
-rw-r--r--
csv.html
67.37
KB
-rw-r--r--
ctypes.html
238.78
KB
-rw-r--r--
curses.ascii.html
22.29
KB
-rw-r--r--
curses.html
146.63
KB
-rw-r--r--
curses.panel.html
14.39
KB
-rw-r--r--
custominterp.html
7.62
KB
-rw-r--r--
datatypes.html
16.84
KB
-rw-r--r--
datetime.html
226.59
KB
-rw-r--r--
dbhash.html
15.48
KB
-rw-r--r--
dbm.html
12.07
KB
-rw-r--r--
debug.html
10.15
KB
-rw-r--r--
decimal.html
194.44
KB
-rw-r--r--
development.html
14.17
KB
-rw-r--r--
difflib.html
84.83
KB
-rw-r--r--
dircache.html
11.41
KB
-rw-r--r--
dis.html
69.95
KB
-rw-r--r--
distutils.html
8.05
KB
-rw-r--r--
dl.html
16.33
KB
-rw-r--r--
doctest.html
165.54
KB
-rw-r--r--
docxmlrpcserver.html
16.43
KB
-rw-r--r--
dumbdbm.html
14.02
KB
-rw-r--r--
dummy_thread.html
9.43
KB
-rw-r--r--
dummy_threading.html
8.37
KB
-rw-r--r--
easydialogs.html
30.55
KB
-rw-r--r--
email-examples.html
45.65
KB
-rw-r--r--
email.charset.html
26.8
KB
-rw-r--r--
email.encoders.html
11.86
KB
-rw-r--r--
email.errors.html
15.77
KB
-rw-r--r--
email.generator.html
20.77
KB
-rw-r--r--
email.header.html
26.92
KB
-rw-r--r--
email.html
44.24
KB
-rw-r--r--
email.iterators.html
11.52
KB
-rw-r--r--
email.message.html
63.16
KB
-rw-r--r--
email.mime.html
27.93
KB
-rw-r--r--
email.parser.html
30.45
KB
-rw-r--r--
email.util.html
24.46
KB
-rw-r--r--
errno.html
37.99
KB
-rw-r--r--
exceptions.html
56.13
KB
-rw-r--r--
fcntl.html
22.67
KB
-rw-r--r--
filecmp.html
22.3
KB
-rw-r--r--
fileformats.html
9.14
KB
-rw-r--r--
fileinput.html
24.28
KB
-rw-r--r--
filesys.html
10.2
KB
-rw-r--r--
fl.html
49.92
KB
-rw-r--r--
fm.html
11.91
KB
-rw-r--r--
fnmatch.html
14.58
KB
-rw-r--r--
formatter.html
34.06
KB
-rw-r--r--
fpectl.html
16.01
KB
-rw-r--r--
fpformat.html
10.59
KB
-rw-r--r--
fractions.html
22.61
KB
-rw-r--r--
framework.html
33.34
KB
-rw-r--r--
frameworks.html
7.14
KB
-rw-r--r--
ftplib.html
43.99
KB
-rw-r--r--
functions.html
183.14
KB
-rw-r--r--
functools.html
27.17
KB
-rw-r--r--
future_builtins.html
13.04
KB
-rw-r--r--
gc.html
25.75
KB
-rw-r--r--
gdbm.html
15.96
KB
-rw-r--r--
gensuitemodule.html
11.51
KB
-rw-r--r--
getopt.html
23.66
KB
-rw-r--r--
getpass.html
10.65
KB
-rw-r--r--
gettext.html
78.76
KB
-rw-r--r--
gl.html
22.09
KB
-rw-r--r--
glob.html
13.26
KB
-rw-r--r--
grp.html
10.49
KB
-rw-r--r--
gzip.html
18.99
KB
-rw-r--r--
hashlib.html
18.2
KB
-rw-r--r--
heapq.html
31.61
KB
-rw-r--r--
hmac.html
10.46
KB
-rw-r--r--
hotshot.html
18.65
KB
-rw-r--r--
htmllib.html
25.32
KB
-rw-r--r--
htmlparser.html
39.11
KB
-rw-r--r--
httplib.html
62.95
KB
-rw-r--r--
i18n.html
9.52
KB
-rw-r--r--
ic.html
17.17
KB
-rw-r--r--
idle.html
20.9
KB
-rw-r--r--
imageop.html
14.76
KB
-rw-r--r--
imaplib.html
51.99
KB
-rw-r--r--
imgfile.html
11.71
KB
-rw-r--r--
imghdr.html
11.3
KB
-rw-r--r--
imp.html
34.34
KB
-rw-r--r--
importlib.html
8.26
KB
-rw-r--r--
imputil.html
31.81
KB
-rw-r--r--
index.html
72.78
KB
-rw-r--r--
inspect.html
50.71
KB
-rw-r--r--
internet.html
24.87
KB
-rw-r--r--
intro.html
8.93
KB
-rw-r--r--
io.html
98.13
KB
-rw-r--r--
ipc.html
13.41
KB
-rw-r--r--
itertools.html
115.91
KB
-rw-r--r--
jpeg.html
12.74
KB
-rw-r--r--
json.html
67.04
KB
-rw-r--r--
keyword.html
7.68
KB
-rw-r--r--
language.html
11.03
KB
-rw-r--r--
linecache.html
10.59
KB
-rw-r--r--
locale.html
55.14
KB
-rw-r--r--
logging.config.html
63.36
KB
-rw-r--r--
logging.handlers.html
69.64
KB
-rw-r--r--
logging.html
95.64
KB
-rw-r--r--
mac.html
21.79
KB
-rw-r--r--
macos.html
14.76
KB
-rw-r--r--
macosa.html
12.96
KB
-rw-r--r--
macostools.html
15.52
KB
-rw-r--r--
macpath.html
7.76
KB
-rw-r--r--
mailbox.html
156.75
KB
-rw-r--r--
mailcap.html
13.21
KB
-rw-r--r--
markup.html
18.77
KB
-rw-r--r--
marshal.html
17.98
KB
-rw-r--r--
math.html
39.24
KB
-rw-r--r--
md5.html
13.97
KB
-rw-r--r--
mhlib.html
21.54
KB
-rw-r--r--
mimetools.html
19.25
KB
-rw-r--r--
mimetypes.html
28.39
KB
-rw-r--r--
mimewriter.html
15.02
KB
-rw-r--r--
mimify.html
13.36
KB
-rw-r--r--
miniaeframe.html
12.2
KB
-rw-r--r--
misc.html
6.87
KB
-rw-r--r--
mm.html
9.03
KB
-rw-r--r--
mmap.html
28.36
KB
-rw-r--r--
modulefinder.html
15.31
KB
-rw-r--r--
modules.html
8.46
KB
-rw-r--r--
msilib.html
52.43
KB
-rw-r--r--
msvcrt.html
19.37
KB
-rw-r--r--
multifile.html
24.3
KB
-rw-r--r--
multiprocessing.html
365.71
KB
-rw-r--r--
mutex.html
11.23
KB
-rw-r--r--
netdata.html
16.98
KB
-rw-r--r--
netrc.html
12.3
KB
-rw-r--r--
new.html
12.12
KB
-rw-r--r--
nis.html
10.64
KB
-rw-r--r--
nntplib.html
41.92
KB
-rw-r--r--
numbers.html
37.75
KB
-rw-r--r--
numeric.html
13.55
KB
-rw-r--r--
operator.html
82
KB
-rw-r--r--
optparse.html
222.56
KB
-rw-r--r--
os.html
214.25
KB
-rw-r--r--
os.path.html
38.34
KB
-rw-r--r--
ossaudiodev.html
41.5
KB
-rw-r--r--
othergui.html
9.08
KB
-rw-r--r--
parser.html
39.36
KB
-rw-r--r--
pdb.html
33.96
KB
-rw-r--r--
persistence.html
14.87
KB
-rw-r--r--
pickle.html
102.27
KB
-rw-r--r--
pickletools.html
10.63
KB
-rw-r--r--
pipes.html
18.01
KB
-rw-r--r--
pkgutil.html
25.11
KB
-rw-r--r--
platform.html
28.37
KB
-rw-r--r--
plistlib.html
17.03
KB
-rw-r--r--
popen2.html
25.43
KB
-rw-r--r--
poplib.html
22.32
KB
-rw-r--r--
posix.html
14.41
KB
-rw-r--r--
posixfile.html
19.76
KB
-rw-r--r--
pprint.html
29.92
KB
-rw-r--r--
profile.html
63.56
KB
-rw-r--r--
pty.html
9.48
KB
-rw-r--r--
pwd.html
11.43
KB
-rw-r--r--
py_compile.html
11.12
KB
-rw-r--r--
pyclbr.html
14.71
KB
-rw-r--r--
pydoc.html
11.48
KB
-rw-r--r--
pyexpat.html
71.53
KB
-rw-r--r--
python.html
12.27
KB
-rw-r--r--
queue.html
24.22
KB
-rw-r--r--
quopri.html
11.9
KB
-rw-r--r--
random.html
37.83
KB
-rw-r--r--
re.html
134.74
KB
-rw-r--r--
readline.html
28.24
KB
-rw-r--r--
repr.html
20.43
KB
-rw-r--r--
resource.html
26.48
KB
-rw-r--r--
restricted.html
11.65
KB
-rw-r--r--
rexec.html
37.41
KB
-rw-r--r--
rfc822.html
42.22
KB
-rw-r--r--
rlcompleter.html
13.51
KB
-rw-r--r--
robotparser.html
12.27
KB
-rw-r--r--
runpy.html
19.34
KB
-rw-r--r--
sched.html
18.54
KB
-rw-r--r--
scrolledtext.html
9.32
KB
-rw-r--r--
select.html
39.67
KB
-rw-r--r--
sets.html
36.92
KB
-rw-r--r--
sgi.html
9.71
KB
-rw-r--r--
sgmllib.html
30.77
KB
-rw-r--r--
sha.html
12.09
KB
-rw-r--r--
shelve.html
27.02
KB
-rw-r--r--
shlex.html
32.1
KB
-rw-r--r--
shutil.html
40.22
KB
-rw-r--r--
signal.html
31.14
KB
-rw-r--r--
simplehttpserver.html
18.41
KB
-rw-r--r--
simplexmlrpcserver.html
31.39
KB
-rw-r--r--
site.html
23.64
KB
-rw-r--r--
smtpd.html
12.46
KB
-rw-r--r--
smtplib.html
42.13
KB
-rw-r--r--
sndhdr.html
10.02
KB
-rw-r--r--
socket.html
106.34
KB
-rw-r--r--
socketserver.html
59.83
KB
-rw-r--r--
someos.html
15.11
KB
-rw-r--r--
spwd.html
10.33
KB
-rw-r--r--
sqlite3.html
139.5
KB
-rw-r--r--
ssl.html
65.62
KB
-rw-r--r--
stat.html
32.31
KB
-rw-r--r--
statvfs.html
10.6
KB
-rw-r--r--
stdtypes.html
260.4
KB
-rw-r--r--
string.html
106.65
KB
-rw-r--r--
stringio.html
18.81
KB
-rw-r--r--
stringprep.html
16.13
KB
-rw-r--r--
strings.html
14.93
KB
-rw-r--r--
struct.html
40.88
KB
-rw-r--r--
subprocess.html
84.91
KB
-rw-r--r--
sun.html
6.84
KB
-rw-r--r--
sunau.html
27.1
KB
-rw-r--r--
sunaudio.html
17.79
KB
-rw-r--r--
symbol.html
7.66
KB
-rw-r--r--
symtable.html
22.94
KB
-rw-r--r--
sys.html
98.7
KB
-rw-r--r--
sysconfig.html
23.84
KB
-rw-r--r--
syslog.html
17.92
KB
-rw-r--r--
tabnanny.html
10.63
KB
-rw-r--r--
tarfile.html
78.68
KB
-rw-r--r--
telnetlib.html
25.48
KB
-rw-r--r--
tempfile.html
29.42
KB
-rw-r--r--
termios.html
16.01
KB
-rw-r--r--
test.html
52.62
KB
-rw-r--r--
textwrap.html
27.25
KB
-rw-r--r--
thread.html
20.47
KB
-rw-r--r--
threading.html
76.69
KB
-rw-r--r--
time.html
56.93
KB
-rw-r--r--
timeit.html
36.27
KB
-rw-r--r--
tix.html
46.96
KB
-rw-r--r--
tk.html
23.64
KB
-rw-r--r--
tkinter.html
67.67
KB
-rw-r--r--
token.html
19.62
KB
-rw-r--r--
tokenize.html
18.45
KB
-rw-r--r--
trace.html
25.54
KB
-rw-r--r--
traceback.html
33.44
KB
-rw-r--r--
ttk.html
101.75
KB
-rw-r--r--
tty.html
9.06
KB
-rw-r--r--
turtle.html
211.74
KB
-rw-r--r--
types.html
27.59
KB
-rw-r--r--
undoc.html
23.16
KB
-rw-r--r--
unicodedata.html
18.55
KB
-rw-r--r--
unittest.html
202.85
KB
-rw-r--r--
unix.html
10.55
KB
-rw-r--r--
urllib.html
58.68
KB
-rw-r--r--
urllib2.html
100.58
KB
-rw-r--r--
urlparse.html
40.41
KB
-rw-r--r--
user.html
11.83
KB
-rw-r--r--
userdict.html
29.73
KB
-rw-r--r--
uu.html
11.03
KB
-rw-r--r--
uuid.html
28.19
KB
-rw-r--r--
warnings.html
46.6
KB
-rw-r--r--
wave.html
22.22
KB
-rw-r--r--
weakref.html
36.52
KB
-rw-r--r--
webbrowser.html
23.07
KB
-rw-r--r--
whichdb.html
8.85
KB
-rw-r--r--
windows.html
9.33
KB
-rw-r--r--
winsound.html
18.75
KB
-rw-r--r--
wsgiref.html
81.04
KB
-rw-r--r--
xdrlib.html
29.94
KB
-rw-r--r--
xml.dom.html
89.04
KB
-rw-r--r--
xml.dom.minidom.html
40.42
KB
-rw-r--r--
xml.dom.pulldom.html
12.71
KB
-rw-r--r--
xml.etree.elementtree.html
93.22
KB
-rw-r--r--
xml.html
16.49
KB
-rw-r--r--
xml.sax.handler.html
38.63
KB
-rw-r--r--
xml.sax.html
20.22
KB
-rw-r--r--
xml.sax.reader.html
39.09
KB
-rw-r--r--
xml.sax.utils.html
14.26
KB
-rw-r--r--
xmlrpclib.html
60.79
KB
-rw-r--r--
zipfile.html
53.14
KB
-rw-r--r--
zipimport.html
20.42
KB
-rw-r--r--
zlib.html
25.46
KB
-rw-r--r--
Delete
Unzip
Zip
${this.title}
Close
Code Editor : fcntl.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>35.10. fcntl — The fcntl() and ioctl() system calls — Python 2.7.5 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '2.7.5', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.5 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="top" title="Python 2.7.5 documentation" href="../index.html" /> <link rel="up" title="35. Unix Specific Services" href="unix.html" /> <link rel="next" title="35.11. pipes — Interface to shell pipelines" href="pipes.html" /> <link rel="prev" title="35.9. pty — Pseudo-terminal utilities" href="pty.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head> <body> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="pipes.html" title="35.11. pipes — Interface to shell pipelines" accesskey="N">next</a> |</li> <li class="right" > <a href="pty.html" title="35.9. pty — Pseudo-terminal utilities" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="http://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.5 documentation</a> » </li> <li><a href="index.html" >The Python Standard Library</a> »</li> <li><a href="unix.html" accesskey="U">35. Unix Specific Services</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="module-fcntl"> <span id="fcntl-the-fcntl-and-ioctl-system-calls"></span><h1>35.10. <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-mod docutils literal"><span class="pre">fcntl</span></tt></a> — The <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-func docutils literal"><span class="pre">fcntl()</span></tt></a> and <tt class="xref py py-func docutils literal"><span class="pre">ioctl()</span></tt> system calls<a class="headerlink" href="#module-fcntl" title="Permalink to this headline">¶</a></h1> <p id="index-0">This module performs file control and I/O control on file descriptors. It is an interface to the <tt class="xref c c-func docutils literal"><span class="pre">fcntl()</span></tt> and <tt class="xref c c-func docutils literal"><span class="pre">ioctl()</span></tt> Unix routines.</p> <p>All functions in this module take a file descriptor <em>fd</em> as their first argument. This can be an integer file descriptor, such as returned by <tt class="docutils literal"><span class="pre">sys.stdin.fileno()</span></tt>, or a file object, such as <tt class="docutils literal"><span class="pre">sys.stdin</span></tt> itself, which provides a <tt class="xref py py-meth docutils literal"><span class="pre">fileno()</span></tt> which returns a genuine file descriptor.</p> <p>The module defines the following functions:</p> <dl class="function"> <dt id="fcntl.fcntl"> <tt class="descclassname">fcntl.</tt><tt class="descname">fcntl</tt><big>(</big><em>fd</em>, <em>op</em><span class="optional">[</span>, <em>arg</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#fcntl.fcntl" title="Permalink to this definition">¶</a></dt> <dd><p>Perform the requested operation on file descriptor <em>fd</em> (file objects providing a <tt class="xref py py-meth docutils literal"><span class="pre">fileno()</span></tt> method are accepted as well). The operation is defined by <em>op</em> and is operating system dependent. These codes are also found in the <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-mod docutils literal"><span class="pre">fcntl</span></tt></a> module. The argument <em>arg</em> is optional, and defaults to the integer value <tt class="docutils literal"><span class="pre">0</span></tt>. When present, it can either be an integer value, or a string. With the argument missing or an integer value, the return value of this function is the integer return value of the C <tt class="xref c c-func docutils literal"><span class="pre">fcntl()</span></tt> call. When the argument is a string it represents a binary structure, e.g. created by <a class="reference internal" href="struct.html#struct.pack" title="struct.pack"><tt class="xref py py-func docutils literal"><span class="pre">struct.pack()</span></tt></a>. The binary data is copied to a buffer whose address is passed to the C <tt class="xref c c-func docutils literal"><span class="pre">fcntl()</span></tt> call. The return value after a successful call is the contents of the buffer, converted to a string object. The length of the returned string will be the same as the length of the <em>arg</em> argument. This is limited to 1024 bytes. If the information returned in the buffer by the operating system is larger than 1024 bytes, this is most likely to result in a segmentation violation or a more subtle data corruption.</p> <p>If the <tt class="xref c c-func docutils literal"><span class="pre">fcntl()</span></tt> fails, an <a class="reference internal" href="exceptions.html#exceptions.IOError" title="exceptions.IOError"><tt class="xref py py-exc docutils literal"><span class="pre">IOError</span></tt></a> is raised.</p> </dd></dl> <dl class="function"> <dt id="fcntl.ioctl"> <tt class="descclassname">fcntl.</tt><tt class="descname">ioctl</tt><big>(</big><em>fd</em>, <em>op</em><span class="optional">[</span>, <em>arg</em><span class="optional">[</span>, <em>mutate_flag</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#fcntl.ioctl" title="Permalink to this definition">¶</a></dt> <dd><p>This function is identical to the <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-func docutils literal"><span class="pre">fcntl()</span></tt></a> function, except that the operations are typically defined in the library module <a class="reference internal" href="termios.html#module-termios" title="termios: POSIX style tty control. (Unix)"><tt class="xref py py-mod docutils literal"><span class="pre">termios</span></tt></a> and the argument handling is even more complicated.</p> <p>The op parameter is limited to values that can fit in 32-bits.</p> <p>The parameter <em>arg</em> can be one of an integer, absent (treated identically to the integer <tt class="docutils literal"><span class="pre">0</span></tt>), an object supporting the read-only buffer interface (most likely a plain Python string) or an object supporting the read-write buffer interface.</p> <p>In all but the last case, behaviour is as for the <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-func docutils literal"><span class="pre">fcntl()</span></tt></a> function.</p> <p>If a mutable buffer is passed, then the behaviour is determined by the value of the <em>mutate_flag</em> parameter.</p> <p>If it is false, the buffer’s mutability is ignored and behaviour is as for a read-only buffer, except that the 1024 byte limit mentioned above is avoided – so long as the buffer you pass is as least as long as what the operating system wants to put there, things should work.</p> <p>If <em>mutate_flag</em> is true, then the buffer is (in effect) passed to the underlying <a class="reference internal" href="#fcntl.ioctl" title="fcntl.ioctl"><tt class="xref py py-func docutils literal"><span class="pre">ioctl()</span></tt></a> system call, the latter’s return code is passed back to the calling Python, and the buffer’s new contents reflect the action of the <a class="reference internal" href="#fcntl.ioctl" title="fcntl.ioctl"><tt class="xref py py-func docutils literal"><span class="pre">ioctl()</span></tt></a>. This is a slight simplification, because if the supplied buffer is less than 1024 bytes long it is first copied into a static buffer 1024 bytes long which is then passed to <a class="reference internal" href="#fcntl.ioctl" title="fcntl.ioctl"><tt class="xref py py-func docutils literal"><span class="pre">ioctl()</span></tt></a> and copied back into the supplied buffer.</p> <p>If <em>mutate_flag</em> is not supplied, then from Python 2.5 it defaults to true, which is a change from versions 2.3 and 2.4. Supply the argument explicitly if version portability is a priority.</p> <p>An example:</p> <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">array</span><span class="o">,</span> <span class="nn">fcntl</span><span class="o">,</span> <span class="nn">struct</span><span class="o">,</span> <span class="nn">termios</span><span class="o">,</span> <span class="nn">os</span> <span class="gp">>>> </span><span class="n">os</span><span class="o">.</span><span class="n">getpgrp</span><span class="p">()</span> <span class="go">13341</span> <span class="gp">>>> </span><span class="n">struct</span><span class="o">.</span><span class="n">unpack</span><span class="p">(</span><span class="s">'h'</span><span class="p">,</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">ioctl</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">termios</span><span class="o">.</span><span class="n">TIOCGPGRP</span><span class="p">,</span> <span class="s">" "</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span> <span class="go">13341</span> <span class="gp">>>> </span><span class="n">buf</span> <span class="o">=</span> <span class="n">array</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="s">'h'</span><span class="p">,</span> <span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="gp">>>> </span><span class="n">fcntl</span><span class="o">.</span><span class="n">ioctl</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">termios</span><span class="o">.</span><span class="n">TIOCGPGRP</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> <span class="go">0</span> <span class="gp">>>> </span><span class="n">buf</span> <span class="go">array('h', [13341])</span> </pre></div> </div> </dd></dl> <dl class="function"> <dt id="fcntl.flock"> <tt class="descclassname">fcntl.</tt><tt class="descname">flock</tt><big>(</big><em>fd</em>, <em>op</em><big>)</big><a class="headerlink" href="#fcntl.flock" title="Permalink to this definition">¶</a></dt> <dd><p>Perform the lock operation <em>op</em> on file descriptor <em>fd</em> (file objects providing a <tt class="xref py py-meth docutils literal"><span class="pre">fileno()</span></tt> method are accepted as well). See the Unix manual <em class="manpage">flock(2)</em> for details. (On some systems, this function is emulated using <tt class="xref c c-func docutils literal"><span class="pre">fcntl()</span></tt>.)</p> </dd></dl> <dl class="function"> <dt id="fcntl.lockf"> <tt class="descclassname">fcntl.</tt><tt class="descname">lockf</tt><big>(</big><em>fd</em>, <em>operation</em><span class="optional">[</span>, <em>length</em><span class="optional">[</span>, <em>start</em><span class="optional">[</span>, <em>whence</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#fcntl.lockf" title="Permalink to this definition">¶</a></dt> <dd><p>This is essentially a wrapper around the <a class="reference internal" href="#module-fcntl" title="fcntl: The fcntl() and ioctl() system calls. (Unix)"><tt class="xref py py-func docutils literal"><span class="pre">fcntl()</span></tt></a> locking calls. <em>fd</em> is the file descriptor of the file to lock or unlock, and <em>operation</em> is one of the following values:</p> <ul class="simple"> <li><tt class="xref py py-const docutils literal"><span class="pre">LOCK_UN</span></tt> – unlock</li> <li><tt class="xref py py-const docutils literal"><span class="pre">LOCK_SH</span></tt> – acquire a shared lock</li> <li><tt class="xref py py-const docutils literal"><span class="pre">LOCK_EX</span></tt> – acquire an exclusive lock</li> </ul> <p>When <em>operation</em> is <tt class="xref py py-const docutils literal"><span class="pre">LOCK_SH</span></tt> or <tt class="xref py py-const docutils literal"><span class="pre">LOCK_EX</span></tt>, it can also be bitwise ORed with <tt class="xref py py-const docutils literal"><span class="pre">LOCK_NB</span></tt> to avoid blocking on lock acquisition. If <tt class="xref py py-const docutils literal"><span class="pre">LOCK_NB</span></tt> is used and the lock cannot be acquired, an <a class="reference internal" href="exceptions.html#exceptions.IOError" title="exceptions.IOError"><tt class="xref py py-exc docutils literal"><span class="pre">IOError</span></tt></a> will be raised and the exception will have an <em>errno</em> attribute set to <tt class="xref py py-const docutils literal"><span class="pre">EACCES</span></tt> or <tt class="xref py py-const docutils literal"><span class="pre">EAGAIN</span></tt> (depending on the operating system; for portability, check for both values). On at least some systems, <tt class="xref py py-const docutils literal"><span class="pre">LOCK_EX</span></tt> can only be used if the file descriptor refers to a file opened for writing.</p> <p><em>length</em> is the number of bytes to lock, <em>start</em> is the byte offset at which the lock starts, relative to <em>whence</em>, and <em>whence</em> is as with <tt class="xref py py-func docutils literal"><span class="pre">fileobj.seek()</span></tt>, specifically:</p> <ul class="simple"> <li><tt class="xref py py-const docutils literal"><span class="pre">0</span></tt> – relative to the start of the file (<tt class="xref py py-const docutils literal"><span class="pre">SEEK_SET</span></tt>)</li> <li><tt class="xref py py-const docutils literal"><span class="pre">1</span></tt> – relative to the current buffer position (<tt class="xref py py-const docutils literal"><span class="pre">SEEK_CUR</span></tt>)</li> <li><tt class="xref py py-const docutils literal"><span class="pre">2</span></tt> – relative to the end of the file (<tt class="xref py py-const docutils literal"><span class="pre">SEEK_END</span></tt>)</li> </ul> <p>The default for <em>start</em> is 0, which means to start at the beginning of the file. The default for <em>length</em> is 0 which means to lock to the end of the file. The default for <em>whence</em> is also 0.</p> </dd></dl> <p>Examples (all on a SVR4 compliant system):</p> <div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">struct</span><span class="o">,</span> <span class="nn">fcntl</span><span class="o">,</span> <span class="nn">os</span> <span class="n">f</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="o">...</span><span class="p">)</span> <span class="n">rv</span> <span class="o">=</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">fcntl</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">F_SETFL</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">O_NDELAY</span><span class="p">)</span> <span class="n">lockdata</span> <span class="o">=</span> <span class="n">struct</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="s">'hhllhh'</span><span class="p">,</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">F_WRLCK</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="n">rv</span> <span class="o">=</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">fcntl</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">fcntl</span><span class="o">.</span><span class="n">F_SETLKW</span><span class="p">,</span> <span class="n">lockdata</span><span class="p">)</span> </pre></div> </div> <p>Note that in the first example the return value variable <em>rv</em> will hold an integer value; in the second example it will hold a string value. The structure lay-out for the <em>lockdata</em> variable is system dependent — therefore using the <a class="reference internal" href="#fcntl.flock" title="fcntl.flock"><tt class="xref py py-func docutils literal"><span class="pre">flock()</span></tt></a> call may be better.</p> <div class="admonition-see-also admonition seealso"> <p class="first admonition-title">See also</p> <dl class="last docutils"> <dt>Module <a class="reference internal" href="os.html#module-os" title="os: Miscellaneous operating system interfaces."><tt class="xref py py-mod docutils literal"><span class="pre">os</span></tt></a></dt> <dd>If the locking flags <tt class="xref py py-const docutils literal"><span class="pre">O_SHLOCK</span></tt> and <tt class="xref py py-const docutils literal"><span class="pre">O_EXLOCK</span></tt> are present in the <a class="reference internal" href="os.html#module-os" title="os: Miscellaneous operating system interfaces."><tt class="xref py py-mod docutils literal"><span class="pre">os</span></tt></a> module (on BSD only), the <a class="reference internal" href="os.html#os.open" title="os.open"><tt class="xref py py-func docutils literal"><span class="pre">os.open()</span></tt></a> function provides an alternative to the <a class="reference internal" href="#fcntl.lockf" title="fcntl.lockf"><tt class="xref py py-func docutils literal"><span class="pre">lockf()</span></tt></a> and <a class="reference internal" href="#fcntl.flock" title="fcntl.flock"><tt class="xref py py-func docutils literal"><span class="pre">flock()</span></tt></a> functions.</dd> </dl> </div> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="pty.html" title="previous chapter">35.9. <tt class="docutils literal"><span class="pre">pty</span></tt> — Pseudo-terminal utilities</a></p> <h4>Next topic</h4> <p class="topless"><a href="pipes.html" title="next chapter">35.11. <tt class="docutils literal"><span class="pre">pipes</span></tt> — Interface to shell pipelines</a></p> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li><a href="../_sources/library/fcntl.txt" rel="nofollow">Show Source</a></li> </ul> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="pipes.html" title="35.11. pipes — Interface to shell pipelines" >next</a> |</li> <li class="right" > <a href="pty.html" title="35.9. pty — Pseudo-terminal utilities" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="http://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.5 documentation</a> » </li> <li><a href="index.html" >The Python Standard Library</a> »</li> <li><a href="unix.html" >35. Unix Specific Services</a> »</li> </ul> </div> <div class="footer"> © <a href="../copyright.html">Copyright</a> 1990-2019, Python Software Foundation. <br /> The Python Software Foundation is a non-profit corporation. <a href="http://www.python.org/psf/donations/">Please donate.</a> <br /> Last updated on Jul 03, 2019. <a href="../bugs.html">Found a bug</a>? <br /> Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3. </div> </body> </html>
Close