111 lines
3.5 KiB
ReStructuredText
111 lines
3.5 KiB
ReStructuredText
:mod:`uos` -- basic "operating system" services
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===============================================
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.. module:: uos
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:synopsis: basic "operating system" services
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|see_cpython_module| :mod:`python:os`.
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The ``uos`` module contains functions for filesystem access and ``urandom``
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function.
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Functions
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---------
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.. function:: chdir(path)
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Change current directory.
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.. function:: getcwd()
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Get the current directory.
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.. function:: ilistdir([dir])
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This function returns an iterator which then yields 3-tuples corresponding to
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the entries in the directory that it is listing. With no argument it lists the
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current directory, otherwise it lists the directory given by *dir*.
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The 3-tuples have the form *(name, type, inode)*:
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- *name* is a string (or bytes if *dir* is a bytes object) and is the name of
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the entry;
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- *type* is an integer that specifies the type of the entry, with 0x4000 for
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directories and 0x8000 for regular files;
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- *inode* is an integer corresponding to the inode of the file, and may be 0
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for filesystems that don't have such a notion.
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.. function:: listdir([dir])
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With no argument, list the current directory. Otherwise list the given directory.
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.. function:: mkdir(path)
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Create a new directory.
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.. function:: remove(path)
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Remove a file.
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.. function:: rmdir(path)
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Remove a directory.
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.. function:: rename(old_path, new_path)
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Rename a file.
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.. function:: stat(path)
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Get the status of a file or directory.
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.. function:: statvfs(path)
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Get the status of a fileystem.
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Returns a tuple with the filesystem information in the following order:
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* ``f_bsize`` -- file system block size
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* ``f_frsize`` -- fragment size
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* ``f_blocks`` -- size of fs in f_frsize units
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* ``f_bfree`` -- number of free blocks
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* ``f_bavail`` -- number of free blocks for unpriviliged users
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* ``f_files`` -- number of inodes
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* ``f_ffree`` -- number of free inodes
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* ``f_favail`` -- number of free inodes for unpriviliged users
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* ``f_flag`` -- mount flags
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* ``f_namemax`` -- maximum filename length
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Parameters related to inodes: ``f_files``, ``f_ffree``, ``f_avail``
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and the ``f_flags`` parameter may return ``0`` as they can be unavailable
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in a port-specific implementation.
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.. function:: sync()
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Sync all filesystems.
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.. function:: urandom(n)
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Return a bytes object with n random bytes. Whenever possible, it is
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generated by the hardware random number generator.
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.. function:: dupterm(stream_object, index=0)
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Duplicate or switch the MicroPython terminal (the REPL) on the given `stream`-like
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object. The *stream_object* argument must implement the ``readinto()`` and
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``write()`` methods. The stream should be in non-blocking mode and
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``readinto()`` should return ``None`` if there is no data available for reading.
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After calling this function all terminal output is repeated on this stream,
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and any input that is available on the stream is passed on to the terminal input.
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The *index* parameter should be a non-negative integer and specifies which
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duplication slot is set. A given port may implement more than one slot (slot 0
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will always be available) and in that case terminal input and output is
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duplicated on all the slots that are set.
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If ``None`` is passed as the *stream_object* then duplication is cancelled on
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the slot given by *index*.
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The function returns the previous stream-like object in the given slot.
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