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docs: update the file of defining FD_SETSIZE in vfs.rst

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Linda 2023-09-12 16:55:37 +08:00
parent 165955dec4
commit 64940ad1d2
2 changed files with 3 additions and 3 deletions
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4
docs/en/api-reference/storage/vfs.rst
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@ -101,7 +101,7 @@ If you want to use :cpp:func:`select` with a file descriptor belonging to a non-
:cpp:func:`end_select` is called to stop/deinitialize/free the environment which was setup by :cpp:func:`start_select`.
.. note::
:cpp:func:`end_select` might be called without a previous :cpp:func:`start_select` call in some rare circumstances. :cpp:func:`end_select` should fail gracefully if this is the case (i.e., should not crash but return an error instead).
Please refer to the reference implementation for the UART peripheral in :component_file:`vfs/vfs_uart.c` and most particularly to the functions :cpp:func:`esp_vfs_dev_uart_register`, :cpp:func:`uart_start_select`, and :cpp:func:`uart_end_select` for more information.
@ -177,7 +177,7 @@ VFS does not impose any limit on total file path length, but it does limit the F
File Descriptors
----------------
File descriptors are small positive integers from ``0`` to ``FD_SETSIZE - 1``, where ``FD_SETSIZE`` is defined in newlib's ``sys/types.h``. The largest file descriptors (configured by ``CONFIG_LWIP_MAX_SOCKETS``) are reserved for sockets. The VFS component contains a lookup-table called ``s_fd_table`` for mapping global file descriptors to VFS driver indexes registered in the ``s_vfs`` array.
File descriptors are small positive integers from ``0`` to ``FD_SETSIZE - 1``, where ``FD_SETSIZE`` is defined in ``sys/select.h``. The largest file descriptors (configured by ``CONFIG_LWIP_MAX_SOCKETS``) are reserved for sockets. The VFS component contains a lookup-table called ``s_fd_table`` for mapping global file descriptors to VFS driver indexes registered in the ``s_vfs`` array.
Standard IO Streams (stdin, stdout, stderr)

2
docs/zh_CN/api-reference/storage/vfs.rst
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@ -177,7 +177,7 @@ VFS 对文件路径长度没有限制，但文件系统路径前缀受 ``ESP_VFS
文件描述符
----------------
文件描述符是一组很小的正整数，从 ``0`` 到 ``FD_SETSIZE - 1``，``FD_SETSIZE`` 在 newlib ``sys/types.h`` 中定义。最大文件描述符由 ``CONFIG_LWIP_MAX_SOCKETS`` 定义，且为套接字保留。VFS 中包含一个名为 ``s_fd_table`` 的查找表，用于将全局文件描述符映射至 ``s_vfs`` 数组中注册的 VFS 驱动索引。
文件描述符是一组很小的正整数，从 ``0`` 到 ``FD_SETSIZE - 1``，``FD_SETSIZE`` 定义在 ``sys/select.h``。最大文件描述符由 ``CONFIG_LWIP_MAX_SOCKETS`` 定义，且为套接字保留。VFS 中包含一个名为 ``s_fd_table`` 的查找表，用于将全局文件描述符映射至 ``s_vfs`` 数组中注册的 VFS 驱动索引。
标准 IO 流 (stdin, stdout, stderr)