python-docs-fr/library/fcntl.po

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#: ../Doc/library/fcntl.rst:2
msgid ":mod:`fcntl` --- The ``fcntl`` and ``ioctl`` system calls"
msgstr ""

#: ../Doc/library/fcntl.rst:14
msgid ""
"This module performs file control and I/O control on file descriptors. It is "
"an interface to the :c:func:`fcntl` and :c:func:`ioctl` Unix routines.  For "
"a complete description of these calls, see :manpage:`fcntl(2)` and :manpage:"
"`ioctl(2)` Unix manual pages."
msgstr ""

#: ../Doc/library/fcntl.rst:19
msgid ""
"All functions in this module take a file descriptor *fd* as their first "
"argument.  This can be an integer file descriptor, such as returned by ``sys."
"stdin.fileno()``, or a file object, such as ``sys.stdin`` itself, which "
"provides a :meth:`~io.IOBase.fileno` which returns a genuine file descriptor."
msgstr ""

#: ../Doc/library/fcntl.rst:24
msgid "The module defines the following functions:"
msgstr "Le module définit les fonctions suivantes :"

#: ../Doc/library/fcntl.rst:29
msgid ""
"Perform the operation *op* on file descriptor *fd* (file objects providing "
"a :meth:`~io.IOBase.fileno` method are accepted as well).  The values used "
"for for *op* are operating system dependent, and are available as constants "
"in the :mod:`fcntl` module, using the same names as used in the relevant C "
"header files.  The argument *arg* is optional, and defaults to the integer "
"value ``0``.  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 :c:func:`fcntl` call.  When "
"the argument is a string it represents a binary structure, e.g. created by :"
"func:`struct.pack`. The binary data is copied to a buffer whose address is "
"passed to the C :c:func:`fcntl` 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 *arg* "
"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."
msgstr ""

#: ../Doc/library/fcntl.rst:46
msgid "If the :c:func:`fcntl` fails, an :exc:`IOError` is raised."
msgstr ""

#: ../Doc/library/fcntl.rst:51
msgid ""
"This function is identical to the :func:`~fcntl.fcntl` function, except that "
"the operations are typically defined in the library module :mod:`termios` "
"and the argument handling is even more complicated."
msgstr ""

#: ../Doc/library/fcntl.rst:55
msgid ""
"The op parameter is limited to values that can fit in 32-bits. Additional "
"constants of interest for use as the *op* argument can be found in the :mod:"
"`termios` module, under the same names as used in the relevant C header "
"files."
msgstr ""

#: ../Doc/library/fcntl.rst:60
msgid ""
"The parameter *arg* can be one of an integer, absent (treated identically to "
"the integer ``0``), an object supporting the read-only buffer interface "
"(most likely a plain Python string) or an object supporting the read-write "
"buffer interface."
msgstr ""

#: ../Doc/library/fcntl.rst:64
msgid ""
"In all but the last case, behaviour is as for the :func:`~fcntl.fcntl` "
"function."
msgstr ""

#: ../Doc/library/fcntl.rst:67
msgid ""
"If a mutable buffer is passed, then the behaviour is determined by the value "
"of the *mutate_flag* parameter."
msgstr ""

#: ../Doc/library/fcntl.rst:70
msgid ""
"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."
msgstr ""

#: ../Doc/library/fcntl.rst:75
msgid ""
"If *mutate_flag* is true, then the buffer is (in effect) passed to the "
"underlying :func:`ioctl` 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 :func:`ioctl`.  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 :func:`ioctl` and "
"copied back into the supplied buffer."
msgstr ""

#: ../Doc/library/fcntl.rst:83
msgid ""
"If *mutate_flag* 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."
msgstr ""

#: ../Doc/library/fcntl.rst:87
msgid "If the :c:func:`ioctl` fails, an :exc:`IOError` exception is raised."
msgstr ""

#: ../Doc/library/fcntl.rst:89
msgid "An example::"
msgstr "Un exemple : ::"

#: ../Doc/library/fcntl.rst:105
msgid ""
"Perform the lock operation *op* on file descriptor *fd* (file objects "
"providing a :meth:`~io.IOBase.fileno` method are accepted as well). See the "
"Unix manual :manpage:`flock(2)` for details.  (On some systems, this "
"function is emulated using :c:func:`fcntl`.)"
msgstr ""

#: ../Doc/library/fcntl.rst:110
msgid "If the :c:func:`flock` fails, an :exc:`IOError` exception is raised."
msgstr ""

#: ../Doc/library/fcntl.rst:115
msgid ""
"This is essentially a wrapper around the :func:`~fcntl.fcntl` locking calls. "
"*fd* is the file descriptor of the file to lock or unlock, and *operation* "
"is one of the following values:"
msgstr ""

#: ../Doc/library/fcntl.rst:119
msgid ":const:`LOCK_UN` -- unlock"
msgstr ""

#: ../Doc/library/fcntl.rst:120
msgid ":const:`LOCK_SH` -- acquire a shared lock"
msgstr ""

#: ../Doc/library/fcntl.rst:121
msgid ":const:`LOCK_EX` -- acquire an exclusive lock"
msgstr ""

#: ../Doc/library/fcntl.rst:123
msgid ""
"When *operation* is :const:`LOCK_SH` or :const:`LOCK_EX`, it can also be "
"bitwise ORed with :const:`LOCK_NB` to avoid blocking on lock acquisition. "
"If :const:`LOCK_NB` is used and the lock cannot be acquired, an :exc:"
"`IOError` will be raised and the exception will have an *errno* attribute "
"set to :const:`EACCES` or :const:`EAGAIN` (depending on the operating "
"system; for portability, check for both values).  On at least some systems, :"
"const:`LOCK_EX` can only be used if the file descriptor refers to a file "
"opened for writing."
msgstr ""

#: ../Doc/library/fcntl.rst:132
msgid ""
"*length* is the number of bytes to lock, *start* is the byte offset at which "
"the lock starts, relative to *whence*, and *whence* is as with :func:`io."
"IOBase.seek`, specifically:"
msgstr ""

#: ../Doc/library/fcntl.rst:136
msgid ":const:`0` -- relative to the start of the file (:data:`os.SEEK_SET`)"
msgstr ""

#: ../Doc/library/fcntl.rst:137
msgid ""
":const:`1` -- relative to the current buffer position (:data:`os.SEEK_CUR`)"
msgstr ""

#: ../Doc/library/fcntl.rst:138
msgid ":const:`2` -- relative to the end of the file (:data:`os.SEEK_END`)"
msgstr ""

#: ../Doc/library/fcntl.rst:140
msgid ""
"The default for *start* is 0, which means to start at the beginning of the "
"file. The default for *length* is 0 which means to lock to the end of the "
"file.  The default for *whence* is also 0."
msgstr ""

#: ../Doc/library/fcntl.rst:144
msgid "Examples (all on a SVR4 compliant system)::"
msgstr ""

#: ../Doc/library/fcntl.rst:154
msgid ""
"Note that in the first example the return value variable *rv* will hold an "
"integer value; in the second example it will hold a string value.  The "
"structure lay-out for the *lockdata* variable is system dependent --- "
"therefore using the :func:`flock` call may be better."
msgstr ""

#: ../Doc/library/fcntl.rst:165
msgid "Module :mod:`os`"
msgstr "Module :mod:`os`"

#: ../Doc/library/fcntl.rst:163
msgid ""
"If the locking flags :data:`~os.O_SHLOCK` and :data:`~os.O_EXLOCK` are "
"present in the :mod:`os` module (on BSD only), the :func:`os.open` function "
"provides an alternative to the :func:`lockf` and :func:`flock` functions."
msgstr ""