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Posted to commits@nuttx.apache.org by gi...@apache.org on 2024/11/12 00:38:57 UTC
(nuttx-website) branch asf-site updated: Publishing web: b0df2aeab6e41e7f7f2ff29ca7dee29d2f62f031 docs: 2464b3207d3819a0ab98e493e8a76b163e3c193a
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github-bot pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/nuttx-website.git
The following commit(s) were added to refs/heads/asf-site by this push:
new 9775aed49 Publishing web: b0df2aeab6e41e7f7f2ff29ca7dee29d2f62f031 docs: 2464b3207d3819a0ab98e493e8a76b163e3c193a
9775aed49 is described below
commit 9775aed49d847023c8713ea5d8beb6e44b189452
Author: Alin Jerpelea <al...@sony.com>
AuthorDate: Tue Nov 12 00:25:56 2024 +0000
Publishing web: b0df2aeab6e41e7f7f2ff29ca7dee29d2f62f031 docs: 2464b3207d3819a0ab98e493e8a76b163e3c193a
---
content/docs/10.0.0/index.html | 2 +-
content/docs/10.0.1/index.html | 2 +-
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content/docs/10.2.0/index.html | 2 +-
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content/docs/11.0.0/index.html | 2 +-
content/docs/12.0.0/index.html | 2 +-
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content/docs/12.7.0/searchindex.js | 2 +-
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content/docs/latest/components/filesystem/fat.html | 4 +
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.../docs/latest/components/filesystem/inotify.html | 8 +-
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73 files changed, 1695 insertions(+), 103 deletions(-)
diff --git a/content/docs/10.0.0/index.html b/content/docs/10.0.0/index.html
index e4663b6b6..531674c7c 100644
--- a/content/docs/10.0.0/index.html
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index b1d4adeb4..df3a5cd80 100644
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-<p>Last Updated: 11 November 24 at 00:13</p>
+<p>Last Updated: 12 November 24 at 00:13</p>
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index e7a8ae177..ec770b2d7 100644
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+<p>Last Updated: 12 November 24 at 00:13</p>
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-<p>Last Updated: 11 November 24 at 00:14</p>
+<p>Last Updated: 12 November 24 at 00:13</p>
<div class="toctree-wrapper compound">
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-<p>Last Updated: 11 November 24 at 00:14</p>
+<p>Last Updated: 12 November 24 at 00:14</p>
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index 5e2a7d467..b425d7a22 100644
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-<p>Last Updated: 11 November 24 at 00:15</p>
+<p>Last Updated: 12 November 24 at 00:14</p>
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+<p>Last Updated: 12 November 24 at 00:15</p>
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--- a/content/docs/12.4.0/index.html
+++ b/content/docs/12.4.0/index.html
@@ -173,7 +173,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:17</p>
+<p>Last Updated: 12 November 24 at 00:16</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.4.0/searchindex.js b/content/docs/12.4.0/searchindex.js
index b5a9b423a..ba7dae214 100644
--- a/content/docs/12.4.0/searchindex.js
+++ b/content/docs/12.4.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.5.0/index.html b/content/docs/12.5.0/index.html
index 47327fc4d..8b0791569 100644
--- a/content/docs/12.5.0/index.html
+++ b/content/docs/12.5.0/index.html
@@ -173,7 +173,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:18</p>
+<p>Last Updated: 12 November 24 at 00:18</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.5.0/searchindex.js b/content/docs/12.5.0/searchindex.js
index 08bdfbf6f..7fb0513f2 100644
--- a/content/docs/12.5.0/searchindex.js
+++ b/content/docs/12.5.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.5.1/index.html b/content/docs/12.5.1/index.html
index cf42990f2..730179e43 100644
--- a/content/docs/12.5.1/index.html
+++ b/content/docs/12.5.1/index.html
@@ -173,7 +173,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:20</p>
+<p>Last Updated: 12 November 24 at 00:19</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.5.1/searchindex.js b/content/docs/12.5.1/searchindex.js
index b4e168624..74220a2fd 100644
--- a/content/docs/12.5.1/searchindex.js
+++ b/content/docs/12.5.1/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/coremark/index", "applications/benchmarks/index", "applications/boot/index", "applications/boot/mcuboot/index", "applications/boot/miniboot/index", "applications/canutils/candump/index", "applications/canutils/canlib/index", "applications/canutils/cansend/index", "applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.6.0/index.html b/content/docs/12.6.0/index.html
index 715b1923e..f73877b96 100644
--- a/content/docs/12.6.0/index.html
+++ b/content/docs/12.6.0/index.html
@@ -174,7 +174,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:21</p>
+<p>Last Updated: 12 November 24 at 00:20</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.6.0/searchindex.js b/content/docs/12.6.0/searchindex.js
index 2082c73c3..330fd2a72 100644
--- a/content/docs/12.6.0/searchindex.js
+++ b/content/docs/12.6.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/cachespeed/index", "applications/benchmarks/coremark-pro/index", "applications/benchmarks/coremark/index", "applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index", "applications/benchmarks/index", "applications/benchmarks/iozone/index", "applications/bench [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/cachespeed/index", "applications/benchmarks/coremark-pro/index", "applications/benchmarks/coremark/index", "applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index", "applications/benchmarks/index", "applications/benchmarks/iozone/index", "applications/bench [...]
\ No newline at end of file
diff --git a/content/docs/12.7.0/index.html b/content/docs/12.7.0/index.html
index 8036b9e26..2505d2416 100644
--- a/content/docs/12.7.0/index.html
+++ b/content/docs/12.7.0/index.html
@@ -173,7 +173,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:22</p>
+<p>Last Updated: 12 November 24 at 00:22</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.7.0/searchindex.js b/content/docs/12.7.0/searchindex.js
index 8837c9925..bd142e657 100644
--- a/content/docs/12.7.0/searchindex.js
+++ b/content/docs/12.7.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/cachespeed/index", "applications/benchmarks/coremark-pro/index", "applications/benchmarks/coremark/index", "applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index", "applications/benchmarks/index", "applications/benchmarks/iozone/index", "applications/bench [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/cachespeed/index", "applications/benchmarks/coremark-pro/index", "applications/benchmarks/coremark/index", "applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index", "applications/benchmarks/index", "applications/benchmarks/iozone/index", "applications/bench [...]
\ No newline at end of file
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new file mode 100644
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new file mode 100644
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new file mode 100644
index 000000000..47db25512
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diff --git a/content/docs/latest/_images/nxffs_page_2.png b/content/docs/latest/_images/nxffs_page_2.png
new file mode 100644
index 000000000..ade6107f2
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diff --git a/content/docs/latest/_images/nxflat-addressing.png b/content/docs/latest/_images/nxflat-addressing.png
new file mode 100644
index 000000000..e3a4764e2
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diff --git a/content/docs/latest/_sources/components/filesystem/how_nxffs_works.rst.txt b/content/docs/latest/_sources/components/filesystem/how_nxffs_works.rst.txt
new file mode 100644
index 000000000..6afb00482
--- /dev/null
+++ b/content/docs/latest/_sources/components/filesystem/how_nxffs_works.rst.txt
@@ -0,0 +1,11 @@
+===============
+How NXFFS works
+===============
+
+.. warning::
+ Migrated from:
+ https://cwiki.apache.org/confluence/display/NUTTX/How+NXFFS+Works
+
+.. image:: nxffs/nxffs_page_0.png
+.. image:: nxffs/nxffs_page_1.png
+.. image:: nxffs/nxffs_page_2.png
\ No newline at end of file
diff --git a/content/docs/latest/_sources/components/filesystem/index.rst.txt b/content/docs/latest/_sources/components/filesystem/index.rst.txt
index 798e85f83..019787e35 100644
--- a/content/docs/latest/_sources/components/filesystem/index.rst.txt
+++ b/content/docs/latest/_sources/components/filesystem/index.rst.txt
@@ -553,6 +553,10 @@ NuttX provides support for a variety of file systems out of the box.
userfs.rst
zipfs.rst
inotify.rst
+ nuttxfs.rst
+ nxflat.rst
+ pseudofs.rst
+ special_files_dev_num.rst
FS Categories
-------------
diff --git a/content/docs/latest/_sources/components/filesystem/nuttxfs.rst.txt b/content/docs/latest/_sources/components/filesystem/nuttxfs.rst.txt
new file mode 100644
index 000000000..c2fcb56bf
--- /dev/null
+++ b/content/docs/latest/_sources/components/filesystem/nuttxfs.rst.txt
@@ -0,0 +1,11 @@
+========
+Nuttx FS
+========
+
+.. warning::
+ Migrated from:
+ https://cwiki.apache.org/confluence/display/NUTTX/NuttX+File+System
+
+.. image:: nuttxfs/nuttxfs_page_0.png
+.. image:: nuttxfs/nuttxfs_page_1.png
+.. image:: nuttxfs/nuttxfs_page_2.png
\ No newline at end of file
diff --git a/content/docs/latest/_sources/components/filesystem/nxffs.rst.txt b/content/docs/latest/_sources/components/filesystem/nxffs.rst.txt
index b3936e710..50acafbc9 100644
--- a/content/docs/latest/_sources/components/filesystem/nxffs.rst.txt
+++ b/content/docs/latest/_sources/components/filesystem/nxffs.rst.txt
@@ -184,3 +184,10 @@ Things to Do
implementation of a proper truncate() method which should alter the
size of a previously written file. There is some fragmentary logic in
place but even this is conditioned out with __NO_TRUNCATE_SUPPORT__.
+
+
+Further reference
+=================
+
+.. toctree::
+ how_nxffs_works.rst
\ No newline at end of file
diff --git a/content/docs/latest/_sources/components/filesystem/nxflat.rst.txt b/content/docs/latest/_sources/components/filesystem/nxflat.rst.txt
new file mode 100644
index 000000000..6d0b22062
--- /dev/null
+++ b/content/docs/latest/_sources/components/filesystem/nxflat.rst.txt
@@ -0,0 +1,180 @@
+=================================
+NuttX FLAT Binary Format (NXFLAT)
+=================================
+
+.. warning::
+ Migrated from:
+ https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139630111
+
+Overview
+========
+
+NuttX supports a configurable :doc:`binary loader <../binfmt>` .
+This binary loader supports loading and executing binary objects from
+the file system.
+The NuttX binary loader is capable of supporting multiple binary formats.
+One of of those binary formats is NXFLAT, the top of this Wiki page.
+
+NXFLAT is a customized and simplified version of binary format
+implemented a few years ago called XFLAT.
+With the NXFLAT binary format you will be able to do the following:
+
+* Place separately linked programs in a file system, and
+
+* Execute those programs by dynamically linking them to the
+ base NuttX code.
+
+This allows you to extend the NuttX base code after it has been
+written into FLASH.
+One motivation for implementing NXFLAT is support clean CGI under
+an HTTPD server.
+
+This feature is especially attractive when combined with the
+NuttX ROMFS support:
+ROMFS allows you to execute programs in place (XIP) in flash
+without copying anything other than the .data section to RAM.
+In fact, the initial NXFLAT release only worked on ROMFS.
+Later extensions also support execution NXFLAT binaries from
+an SRAM copy as well.
+
+This NuttX feature includes:
+
+* A dynamic loader that is built into the NuttX core (See SVN).
+* Minor changes to RTOS to support position independent code, and
+* A linker to bind ELF binaries to produce the
+ NXFLAT binary format (See SVN).
+
+Toolchain Compatibility Problem
+===============================
+
+Description
+-----------
+
+NXFLAT flat requires a specific kind of position independence.
+The ARM family of GCC toolchains has historically supported
+this method of position independence: All code addresses are
+accessed relative to the Program Counter (PC) and a special,
+`PIC register` (usually ``r10``) is used to access all data. To
+load or store a data value, the contents of ``r10``, the PIC
+base, is added to a constant, position-independent offset
+to produce the absolute address of the data.
+
+.. image:: nxflat/nxflat-addressing.png
+
+The `Global Offset Table` (GOT) is a special data structure that
+resides in D-Space. So PIC-base relative addressing may also
+be specified as GOT-Relative addressing (or ``GOTOFF``). The older
+GCC 4.3.3 GCC compiler, for example, generates ``GOTOFF``
+relocations to the constant strings, like:
+
+.. code-block:: asm
+
+ .L3:
+ .word .LC0(GOTOFF)
+ .word .LC1(GOTOFF)
+ .word .LC2(GOTOFF)
+ .word .LC3(GOTOFF)
+ .word .LC4(GOTOFF)
+
+Where ``.LC0``, ``.LC1``, ``.LC2``, ``.LC3``, and ``.LC4`` are the labels
+corresponding to strings in the ``.rodata.str1.1`` section. One
+consequence of this is that ``.rodata`` must reside in D-Space
+since it will addressed relative to the GOT (see the section
+entitled "Read-Only Data in RAM" here).
+
+The newer 4.6.3 GCC compiler, however, generated PC relative
+relocations to these same strings:
+
+.. code-block::
+
+ .L2:
+ .word .LC0-(.LPIC0+4)
+ .word .LC1-(.LPIC1+4)
+ .word .LC2-(.LPIC2+4)
+ .word .LC3-(.LPIC4+4)
+ .word .LC4-(.LPIC5+4)
+
+These are `PC-Relative` relocations. This means that the string
+data is address not by an offset relative to the PIC register
+(``r10``) but to the program count (PC). This is good and bad. This
+is good because it means that ``.rodata.str1.1`` must now can now
+reside in FLASH with ``.text`` and can be accessed using PC-relative
+addressing. That can be accomplished by simply moving the ``.rodata``
+from the ``.data`` section to the ``.text`` section in the linker script.
+The NXFLAT linker script is located at
+``nuttx/binfmt/libnxflat/gnu-nxflat-?.ld``. **NOTE**: There are two
+linker scripts located at ``nuttx/binfmt/libnxflat/``:
+
+1. ``binfmt/libnxflat/gnu-nxflat-gotoff.ld.`` Older versions
+ of GCC (at least up to GCC 4.3.3), use GOT-relative
+ addressing to access RO data. In that case, read-only
+ data (``.rodata``) must reside in D-Space and this linker
+ script should be used.
+2. ``binfmt/libnxflat/gnu-nxflat-pcrel.ld.`` Newer versions
+ of GCC (at least as of GCC 4.6.3), use PC-relative
+ addressing to access RO data. In that case, read-only
+ data (``.rodata``) must reside in I-Space and this linker
+ script should be used.
+
+But this is very bad because a lot of NXFLAT is now broken.
+For it appears that not just constant strings, but that all
+data may now be referenced using PC-relative addressing to
+.bss and .data values. I do not yet know the extent of this
+problem or the direction that GCC is going but certainly
+version 4.6.3 cannot be used with NXFLAT.
+
+The workaround for now is to use the older, 4.3.3 OABI
+compiler. In the long run, this might spell the end
+to NXFLAT.
+
+Update: Restored GCC Support
+----------------------------
+
+This post was pointed out by Michael Jung:
+
+.. code-block:: bash
+
+ MCU: STM32F4 (ARM Cortex M4)
+ Build environment: arm-none-eabi-gcc 4.8.4 20140725
+
+ My goal is to build an image that can be run from any properly-aligned
+ offset in internal flash (i.e., position-independent). I found the
+ following set of gcc flags that achieves this goal:
+
+ # Generate position independent code.
+ -fPIC
+
+ # Access bss via the GOT.
+ -mno-pic-data-is-text-relative
+
+ # GOT is not PC-relative; store GOT location in a register.
+ -msingle-pic-base
+
+ # Store GOT location in r9.
+ -mpic-register=r9
+
+Reference: https://gcc.gnu.org/ml/gcc-help/2015-07/msg00027.html
+
+Michael has verified that ``-mno-pic-data-is-text-relative`` is,
+indeed, a solution to the above NXFLAT problem in newer
+compilers. You simply need to modify the board Make.defs
+file like:
+
+1. ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+.. code-block:: bash
+
+ +ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10 -mno-pic-data-is-text-relative
+
+NOTE the minor difference from the post: NuttX uses ``r10`` as
+the PIC base register by default in all configurations.
+
+See this `thread <https://groups.google.com/forum/>`_ for additional information.
+
+References
+----------
+
+* :doc:`NXFLAT <../nxflat>`
+* `XFLATFLAT <http://xflat.sourceforge.net/>`_
+* `FLAT <http://retired.beyondlogic.org/uClinux/bflt.htm>`_
+* `ROMFS <http://romfs.sourceforge.net/>`_
\ No newline at end of file
diff --git a/content/docs/latest/_sources/components/filesystem/pseudofs.rst.txt b/content/docs/latest/_sources/components/filesystem/pseudofs.rst.txt
new file mode 100644
index 000000000..8f716ada9
--- /dev/null
+++ b/content/docs/latest/_sources/components/filesystem/pseudofs.rst.txt
@@ -0,0 +1,211 @@
+==================
+Pseudo File System
+==================
+
+.. warning::
+ Migrated from:
+ https://cwiki.apache.org/confluence/display/NUTTX/Pseudo+File+System
+
+Overview
+========
+
+Pseudo Root File System
+-----------------------
+
+NuttX includes an optional, scalable file system. As a minimum, this may
+be a simple in-memory, pseudo file system. This is an in-memory file
+system because it does not require any storage medium or block driver
+support. Rather, file system contents are generated on-the-fly as
+referenced via standard file system operations (open, close, read,
+write, etc.). In this sense, the file system is a pseudo file system
+(in the same sense that the Linux ``/proc`` file system is also referred
+to as a pseudo file system).
+
+Any user supplied data or logic can be accessed via the pseudo-file
+system. Built in support is provided for character, block, and MTD
+(Memory Technology Device) drivers in the ``/dev`` pseudo file system
+directory.
+
+Special Files
+-------------
+
+NuttX does not support special files in the way that, say,
+Linux does. In fact, it is more correct to say that NuttX
+file systems do not support special files at all.
+
+NuttX does, however, support Linux-like special `device node`,
+character driver, and block driver files (as well as NuttX-specific
+mountpoint, named semaphore, message queue, and shared memory
+special files). However, these are not special files in sense
+that the term special files is used in a POSIX environment: In
+NuttX these special files may `only` be created in the root
+pseudo-file system. For the case of device nodes, see `Device
+Nodes <https://cwiki.apache.org/confluence/display/NUTTX/Device+Nodes>`_
+for further information.
+
+In NuttX, the underlying principle is that all `named resources`
+appear as special files in the root pseudo-file system and are
+managed by the VFS.
+
+Mounted Volumes
+---------------
+
+The simple in-memory file system can be extended by mounting block
+devices that provide access to true file systems backed up via
+some mass storage device. NuttX supports the standard mount()
+command that allows a block driver to be bound to a mount point
+within the pseudo file system and to a file system. At present,
+NuttX supports the standard VFAT and ROMFS file systems, a
+special, wear-levelling NuttX FLASH File System (NXFFS), as well
+as a Network File System client (NFS version 3, UDP).
+
+Comparison to Linux
+-------------------
+
+From a programming perspective, the NuttX file system appears
+very similar to a Linux file system. However, there is a
+fundamental difference: The NuttX root file system is a pseudo
+file system and true file systems may be mounted in the pseudo
+file system. In the typical Linux installation by comparison,
+the Linux root file system is a true file system and pseudo
+file systems may be mounted in the true, root file system.
+The approach selected by NuttX is intended to support greater
+scalability from the very tiny platform to the moderate platform.
+
+FAQ
+===
+
+**Question**: I'm wondering why I can't create a directory. If
+I try to create a dir.
+
+.. code-block:: bash
+
+ mkdir /mnt
+
+I get this,
+
+.. code-block:: bash
+
+ nsh: mkdir: mkdir failed: 2
+
+although if I do this it creates both directories, mnt and sda
+
+.. code-block:: bash
+
+ mount -t vfat /dev/mmcsd0 /mnt/sda
+
+**Answer**: This is because the top level directories are part of a
+`pseudo-filesystem` – like the Linux ``proc/`` or ``sys/`` file systems.
+But the NuttX pseudo-file system begins at the top level ``/``.
+
+What that really means is that you do must have
+``CONFIG_DISABLE_PSEUDOFS_OPERATIONS`` selected. Because you
+can normally create directories in the pseudo-filesystem
+with not problem:
+
+.. code-block:: bash
+
+ NuttShell (NSH) NuttX-9.0.0
+ nsh> mkdir /mnt
+ nsh> ls
+ /:
+ dev/
+ etc/
+ mnt/
+ proc/
+ tmp/
+ nsh> ls mnt
+ /mnt:
+ nsh>
+
+But lets assume that you do have operations on the pseudo-file
+system disabled. Why doesn't it work? There is no `real` media
+there so you cannot create a file there or create any directories
+there. The ``mount`` command is special, it knows how to create mount
+points in the pseudo-file system.
+
+The pseudo-file system is just a tree structure in RAM.
+It serves two purposes: (1) you don't have to have a real
+file system to use NuttX.
+It comes up out-of-the-box with usable (but limited)
+pseudo-file system. That allows a little more civilized
+programming environment on even very resource limited MCUs.
+And (2) this pseudo-file system is a place where all special
+NuttX files are retained: Character drivers, block drivers,
+and mount points.
+
+The NuttX top-level pseudo-filesystem creates the `illusion` of
+directories and provides a consistent, seamless semantic for
+interacting with mounted file systems. If there is a file
+called ``hello.txt`` in your volume mounted at ``/mnt/sda``, then:
+
+``/mnt`` - is a `node` in the pseudo-filesystem that does
+nothing but contain the name mnt and provide links
+to things `under` ``mnt``.
+
+``/mnt/sda`` - This refers to a node that contains the name
+sda that can be found `under` the node with the name mnt.
+This node is a special `mountpoint node` in the pseudo-filesystem.
+It contains the methods needed to interact will real file system.
+Everything `below` ``/mnt/sda`` is in the physical media.
+
+``/mnt/sda/hello.txt`` - This, then refers to the file
+``hello.txt`` at the relative path ``hello.txt`` on the mounted media.
+The transition from the pseudo-filesystem to the
+real media is seamless.
+
+This is a little different from Linux: Linux always
+has to boot up with a `real` file system – even if it
+is only a initrd RAM disk.
+In Linux, these special files (links, drivers, pipes,
+etc.) reside on real media and can reside in any
+Linux-compatible filesystem.
+
+Normal ``mkdir`` can only work if there is a `real` filesystem
+at the location. There are no real directories in the
+pseudo-filesystem. The pseudo-filesystem does support
+`nodes` that look like directories and have some of the
+properties of directories (like the node ``/mnt`` mentioned
+above). But this is really an illusion.
+
+If ``CONFIG_DISABLE_PSEUDOFS_OPERATIONS`` is not enabled,
+then NuttX adds the capability to create new, empty `nodes`
+in the pseudo-filesystem using ``mkdir``, completing the illusion.
+
+[On the other hand, all directories are really an
+`illusion` in a way and I suppose that in that sense
+these nodes the pseudo-filesystem are just as `real`
+as any other directory.]
+
+After you mount the SD card at ``/mnt/sda``, then you can do:
+
+.. code-block:: bash
+
+ mkdir /mnt/sda/newdir
+
+That should work fine and should create a directory at
+the relative path ``newdir`` in the mounted volume.
+
+There are a few other special NSH commands like mount that
+can change the pseudo-filesystem. Like ``losetup``, ``mkfifo``,
+``mkrd``, ``umount``, etc.
+In fact, these commands `only` work in the pseudo-filesystem.
+Try them in ``/mnt/sda``... they won't work.
+
+But none of the `normal` commands that modify files or directories
+will work in the pseudo-filesystem: ``mkdir``, ``mv``, ``rm``, ``rmdir``.
+These all require real media. They will not work in the
+pseudo-filesystem, but will work in ``/mnt/sda``.
+
+And trying to pipe to something in the pseudo-filesystem
+will also fail. You cannot do this, for example:
+
+.. code-block:: bash
+
+ NuttShell (NSH) NuttX-6.20
+ nsh> cat "Hello, World!" >/hello.text
+ nsh: cat: open failed: 22
+ nsh>
+
+See also NxFileSystem in
+`Porting Guide <https://cwiki.apache.org/confluence/display/NUTTX/Porting+Guide>`_
\ No newline at end of file
diff --git a/content/docs/latest/_sources/components/filesystem/special_files_dev_num.rst.txt b/content/docs/latest/_sources/components/filesystem/special_files_dev_num.rst.txt
new file mode 100644
index 000000000..2e0fd615f
--- /dev/null
+++ b/content/docs/latest/_sources/components/filesystem/special_files_dev_num.rst.txt
@@ -0,0 +1,122 @@
+================================
+Special Files and Device Numbers
+================================
+
+.. warning::
+ Migrated from:
+ https://cwiki.apache.org/confluence/display/NUTTX/Special+Files+and+Device+Numbers
+
+Special Files in Unix-like File Systems
+=======================================
+
+In Unix-like operating systems, a `special file` is an interface for
+a device driver that appears in a file system as if it were an
+ordinary file. Special files are a feature built into Unix-like
+file systems such as EXT2.
+
+See also `Wikipedia article <https://en.wikipedia.org/wiki/Device_file>`_.
+
+
+Special Files in Other File Systems
+===================================
+
+Some other file systems systems, such as NTFS, also have some more
+limited and incompatible notion of special files. Others, such as
+FAT, do not have any such concept. Unix-like environments such as
+Cygwin that run on these other file systems have to do things a
+little differently: The have to emulate special files using the
+resources of the file system that they operate on. This may mean
+creating `regular` files with special naming conventions or with
+special content that can be used to emulate the behavior of
+special files.
+
+Special Files and NuttX
+=======================
+
+NuttX has done things in a very different way. There are no
+special files supported in any file system. Rather, special
+files can exist only in the NuttX :doc:`pseudo file system <pseudofs>`. This
+was a decision that was made in the initial design to simplify
+things for resource limited platforms yet still provide a mostly
+standard Unix-like/POSIX programming environment.
+
+What are the advantages of the special files in the NuttX
+pseudo-file system? Reduce resource usage, reduced bring-up
+requirements. What are the disadvantages? In NuttX, special
+files can only reside in the pseudo-file system.
+
+The only other consequence that I aware of is that NuttX cannot
+support the POSIX requirement for the ``st_dev`` field in the
+``struct stat`` structure.
+
+
+Device Files and Device Numbers
+===============================
+
+In a Unix-like system, devices are access special device files.
+In a Unix-like system, device files can reside in any compatible
+file system but, by convention, are always placed in the ``/dev``
+directory. NuttX achieves programming compatibility with this
+convention because the top-level, `root` file system is the
+pseudo-file system and ``/dev`` is part of the pseudo-file system.
+
+But there is a bigger difference that this. The bigger
+difference is how device drivers are registered and how
+the are accessed. The primary content of the Unix-like
+device file is simply a number, a device number, usually
+represented as type ``dev_t``. The device number an encoded
+that consists of a `major` device number and a `minor` device
+number. The major device number identifies the type of
+driver and the minor number identifies an instance of a
+driver of that type.
+
+There is nothing special about these number from the sense of
+a file system. Just because device file exists with a
+certain major and minor number, that does not mean that there
+is actually any real driver instance backing that device file
+up. For example, you can create a device file from the Linux
+command line like this, knowing nothing other than major and
+minor device number:
+
+.. code-block:: C
+
+ dev_t makedev(unsigned int maj, unsigned int min);
+
+In a Unix-like system, when you try to open a device driver
+several things must happen: The system must open the device
+file, obtain the device major and minor number, and then
+look up the driver instance in some internal `registry` of
+registered device drivers. If one is found, then the system
+can complete the open operation.
+
+So, the device number is then a `key` of some kind into a
+`registry` of device drivers. NuttX does this very differently:
+There are no device numbers, rather the pseudo-file system `is`
+the device registry! In NuttX, device files cannot be created
+by users; they can only be created by device drivers by calling
+the following, internal interface:
+
+.. code-block:: c
+
+ int register_driver(FAR const char *path, FAR const struct file_operations *fops, mode_t mode, FAR void *priv);
+
+The ``path`` argument determines where in the pseudo-file system the
+device file should be placed. ``mode`` provides device file privileges.
+The ``fops`` and ``priv`` provide the internal information for the ``registry``.
+
+So the when you open a device driver in NuttX, many fewer steps are
+involved: The system must still open the device file, but then
+since the pseudo-file system `is` the device registry, all of the
+device driver information is available and ``open`` operation
+completes with no further actions.
+
+Named Resources
+===============
+
+This use of the pseudo-file system in NuttX to manage device
+files is consistent with a core NuttX device philosophy: The
+NuttX VFS and the pseudo-file system in particular, are used
+to manage all named OS resources. That applies not only to
+device files and other special files but also to such things
+named message queues and named semaphores (which can be found
+in the pseudo-file system in the ``/var`` directory).
\ No newline at end of file
diff --git a/content/docs/latest/components/filesystem/aio.html b/content/docs/latest/components/filesystem/aio.html
index ecade63c6..90e7aa5d4 100644
--- a/content/docs/latest/components/filesystem/aio.html
+++ b/content/docs/latest/components/filesystem/aio.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/binfs.html b/content/docs/latest/components/filesystem/binfs.html
index 635a7ab44..961e1bf2e 100644
--- a/content/docs/latest/components/filesystem/binfs.html
+++ b/content/docs/latest/components/filesystem/binfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/cromfs.html b/content/docs/latest/components/filesystem/cromfs.html
index db0a2fc12..e30c4009d 100644
--- a/content/docs/latest/components/filesystem/cromfs.html
+++ b/content/docs/latest/components/filesystem/cromfs.html
@@ -158,6 +158,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/fat.html b/content/docs/latest/components/filesystem/fat.html
index 5bff9ac46..e1e5ede35 100644
--- a/content/docs/latest/components/filesystem/fat.html
+++ b/content/docs/latest/components/filesystem/fat.html
@@ -161,6 +161,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/hostfs.html b/content/docs/latest/components/filesystem/hostfs.html
index 71e0f64f9..328802672 100644
--- a/content/docs/latest/components/filesystem/hostfs.html
+++ b/content/docs/latest/components/filesystem/hostfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/tmpfs.html b/content/docs/latest/components/filesystem/how_nxffs_works.html
similarity index 79%
copy from content/docs/latest/components/filesystem/tmpfs.html
copy to content/docs/latest/components/filesystem/how_nxffs_works.html
index cd52b136c..a2fccc328 100644
--- a/content/docs/latest/components/filesystem/tmpfs.html
+++ b/content/docs/latest/components/filesystem/how_nxffs_works.html
@@ -25,7 +25,7 @@
<meta charset="utf-8" /><meta name="generator" content="Docutils 0.18.1: http://docutils.sourceforge.net/" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <title>TMPFS — NuttX latest documentation</title>
+ <title>How NXFFS works — NuttX latest documentation</title>
<link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
<link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
<link rel="stylesheet" type="text/css" href="../../_static/copybutton.css" />
@@ -43,8 +43,8 @@
<script src="../../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
- <link rel="next" title="Union File System" href="unionfs.html" />
- <link rel="prev" title="SPIFFS" href="spiffs.html" />
+ <link rel="next" title="Partition Table" href="partition.html" />
+ <link rel="prev" title="NXFFS" href="nxffs.html" />
</head>
<body class="wy-body-for-nav">
@@ -139,7 +139,17 @@
<li class="toctree-l4"><a class="reference internal" href="mmap.html">File mapping emulation (mmap)</a></li>
<li class="toctree-l4"><a class="reference internal" href="mnemofs.html">MNEMOFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="nfs.html">NFS</a></li>
-<li class="toctree-l4"><a class="reference internal" href="nxffs.html">NXFFS</a></li>
+<li class="toctree-l4 current"><a class="reference internal" href="nxffs.html">NXFFS</a><ul class="current">
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#general-nxffs-organization">General NXFFS organization</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#general-operation">General operation</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#headers">Headers</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#nxffs-limitations">NXFFS Limitations</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#multiple-writers">Multiple Writers</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#ioctls">ioctls</a></li>
+<li class="toctree-l5"><a class="reference internal" href="nxffs.html#things-to-do">Things to Do</a></li>
+<li class="toctree-l5 current"><a class="reference internal" href="nxffs.html#further-reference">Further reference</a></li>
+</ul>
+</li>
<li class="toctree-l4"><a class="reference internal" href="partition.html">Partition Table</a></li>
<li class="toctree-l4"><a class="reference internal" href="procfs.html">PROCFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="romfs.html">ROMFS</a></li>
@@ -147,11 +157,15 @@
<li class="toctree-l4"><a class="reference internal" href="smartfs.html">SMARTFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="shmfs.html">Shared Memory File System</a></li>
<li class="toctree-l4"><a class="reference internal" href="spiffs.html">SPIFFS</a></li>
-<li class="toctree-l4 current"><a class="current reference internal" href="#">TMPFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="tmpfs.html">TMPFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="unionfs.html">Union File System</a></li>
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -196,9 +210,10 @@
<li><a href="../../index.html" class="icon icon-home" aria-label="Home"></a></li>
<li class="breadcrumb-item"><a href="../index.html">OS Components</a></li>
<li class="breadcrumb-item"><a href="index.html">NuttX File System</a></li>
- <li class="breadcrumb-item active">TMPFS</li>
+ <li class="breadcrumb-item"><a href="nxffs.html">NXFFS</a></li>
+ <li class="breadcrumb-item active">How NXFFS works</li>
<li class="wy-breadcrumbs-aside">
- <a href="../../_sources/components/filesystem/tmpfs.rst.txt" rel="nofollow"> View page source</a>
+ <a href="../../_sources/components/filesystem/how_nxffs_works.rst.txt" rel="nofollow"> View page source</a>
</li>
</ul>
<hr/>
@@ -206,21 +221,24 @@
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
- <section id="tmpfs">
-<h1>TMPFS<a class="headerlink" href="#tmpfs" title="Permalink to this heading"></a></h1>
-<p>NuttX TMPFS file system is a tiny dyamic RAM based file system.</p>
-<p>It can be enabled by adding <code class="docutils literal notranslate"><span class="pre">CONFIG_FS_TMPFS=y</span></code> to the configuration at build time.</p>
-<p>At runtime, simply use <code class="docutils literal notranslate"><span class="pre">mount</span> <span class="pre">-t</span> <span class="pre">tmpfs</span> <span class="pre">/tmp</span></code> to have a <code class="docutils literal notranslate"><span class="pre">/tmp</span></code> folder backed by TMPFS, then files and folders can be created under that folder.</p>
-<p>Be aware that TMPFS is backed by kernel memory thus don’t expect to store big files on it and its size is limited by free kernel memory.</p>
-<p>We can watch the size of TMPFS with <code class="docutils literal notranslate"><span class="pre">df</span> <span class="pre">-h</span></code> command, especially you can see the <code class="docutils literal notranslate"><span class="pre">Size</span></code> column of TMPFS changes when files are added or removed in the TMPFS folder. Changes in TMPFS size is always reflected by reverse changes of free kernel memory size.</p>
+ <section id="how-nxffs-works">
+<h1>How NXFFS works<a class="headerlink" href="#how-nxffs-works" title="Permalink to this heading"></a></h1>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>Migrated from:
+<a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/How+NXFFS+Works">https://cwiki.apache.org/confluence/display/NUTTX/How+NXFFS+Works</a></p>
+</div>
+<img alt="../../_images/nxffs_page_0.png" src="../../_images/nxffs_page_0.png" />
+<img alt="../../_images/nxffs_page_1.png" src="../../_images/nxffs_page_1.png" />
+<img alt="../../_images/nxffs_page_2.png" src="../../_images/nxffs_page_2.png" />
</section>
</div>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
- <a href="spiffs.html" class="btn btn-neutral float-left" title="SPIFFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="unionfs.html" class="btn btn-neutral float-right" title="Union File System" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ <a href="nxffs.html" class="btn btn-neutral float-left" title="NXFFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="partition.html" class="btn btn-neutral float-right" title="Partition Table" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
<hr/>
diff --git a/content/docs/latest/components/filesystem/index.html b/content/docs/latest/components/filesystem/index.html
index f793a72cd..1cf06146f 100644
--- a/content/docs/latest/components/filesystem/index.html
+++ b/content/docs/latest/components/filesystem/index.html
@@ -156,6 +156,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -1093,6 +1097,10 @@ to be listed in <code class="docutils literal notranslate"><span class="pre">inc
<li class="toctree-l1"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l1"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l1"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l1"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l1"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l1"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l1"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
</ul>
</div>
<section id="fs-categories">
diff --git a/content/docs/latest/components/filesystem/inotify.html b/content/docs/latest/components/filesystem/inotify.html
index a6ff70fa5..d411d385c 100644
--- a/content/docs/latest/components/filesystem/inotify.html
+++ b/content/docs/latest/components/filesystem/inotify.html
@@ -43,7 +43,7 @@
<script src="../../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
- <link rel="next" title="NuttX libraries" href="../libs/index.html" />
+ <link rel="next" title="Nuttx FS" href="nuttxfs.html" />
<link rel="prev" title="ZipFS" href="zipfs.html" />
</head>
@@ -160,6 +160,10 @@
<li class="toctree-l5"><a class="reference internal" href="#note">NOTE</a></li>
</ul>
</li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -346,7 +350,7 @@ readable.</p>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
<a href="zipfs.html" class="btn btn-neutral float-left" title="ZipFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="../libs/index.html" class="btn btn-neutral float-right" title="NuttX libraries" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ <a href="nuttxfs.html" class="btn btn-neutral float-right" title="Nuttx FS" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
<hr/>
diff --git a/content/docs/latest/components/filesystem/littlefs.html b/content/docs/latest/components/filesystem/littlefs.html
index 7c22a1c27..3ceca64ec 100644
--- a/content/docs/latest/components/filesystem/littlefs.html
+++ b/content/docs/latest/components/filesystem/littlefs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/mmap.html b/content/docs/latest/components/filesystem/mmap.html
index cf99d5c60..28d5b88d5 100644
--- a/content/docs/latest/components/filesystem/mmap.html
+++ b/content/docs/latest/components/filesystem/mmap.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/mnemofs.html b/content/docs/latest/components/filesystem/mnemofs.html
index 2c7cdbedc..6e307a15f 100644
--- a/content/docs/latest/components/filesystem/mnemofs.html
+++ b/content/docs/latest/components/filesystem/mnemofs.html
@@ -157,6 +157,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/nfs.html b/content/docs/latest/components/filesystem/nfs.html
index e6ca30fc2..5115e0837 100644
--- a/content/docs/latest/components/filesystem/nfs.html
+++ b/content/docs/latest/components/filesystem/nfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/nfs.html b/content/docs/latest/components/filesystem/nuttxfs.html
similarity index 86%
copy from content/docs/latest/components/filesystem/nfs.html
copy to content/docs/latest/components/filesystem/nuttxfs.html
index e6ca30fc2..fd7598970 100644
--- a/content/docs/latest/components/filesystem/nfs.html
+++ b/content/docs/latest/components/filesystem/nuttxfs.html
@@ -25,7 +25,7 @@
<meta charset="utf-8" /><meta name="generator" content="Docutils 0.18.1: http://docutils.sourceforge.net/" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <title>NFS — NuttX latest documentation</title>
+ <title>Nuttx FS — NuttX latest documentation</title>
<link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
<link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
<link rel="stylesheet" type="text/css" href="../../_static/copybutton.css" />
@@ -43,8 +43,8 @@
<script src="../../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
- <link rel="next" title="NXFFS" href="nxffs.html" />
- <link rel="prev" title="MNEMOFS" href="mnemofs.html" />
+ <link rel="next" title="NuttX FLAT Binary Format (NXFLAT)" href="nxflat.html" />
+ <link rel="prev" title="Inotify" href="inotify.html" />
</head>
<body class="wy-body-for-nav">
@@ -138,7 +138,7 @@
<li class="toctree-l4"><a class="reference internal" href="littlefs.html">LITTLEFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="mmap.html">File mapping emulation (mmap)</a></li>
<li class="toctree-l4"><a class="reference internal" href="mnemofs.html">MNEMOFS</a></li>
-<li class="toctree-l4 current"><a class="current reference internal" href="#">NFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nfs.html">NFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="nxffs.html">NXFFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="partition.html">Partition Table</a></li>
<li class="toctree-l4"><a class="reference internal" href="procfs.html">PROCFS</a></li>
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4 current"><a class="current reference internal" href="#">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -196,9 +200,9 @@
<li><a href="../../index.html" class="icon icon-home" aria-label="Home"></a></li>
<li class="breadcrumb-item"><a href="../index.html">OS Components</a></li>
<li class="breadcrumb-item"><a href="index.html">NuttX File System</a></li>
- <li class="breadcrumb-item active">NFS</li>
+ <li class="breadcrumb-item active">Nuttx FS</li>
<li class="wy-breadcrumbs-aside">
- <a href="../../_sources/components/filesystem/nfs.rst.txt" rel="nofollow"> View page source</a>
+ <a href="../../_sources/components/filesystem/nuttxfs.rst.txt" rel="nofollow"> View page source</a>
</li>
</ul>
<hr/>
@@ -206,17 +210,24 @@
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
- <section id="nfs">
-<h1>NFS<a class="headerlink" href="#nfs" title="Permalink to this heading"></a></h1>
-<p>Network file system (NFS) client file system.</p>
+ <section id="nuttx-fs">
+<h1>Nuttx FS<a class="headerlink" href="#nuttx-fs" title="Permalink to this heading"></a></h1>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>Migrated from:
+<a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/NuttX+File+System">https://cwiki.apache.org/confluence/display/NUTTX/NuttX+File+System</a></p>
+</div>
+<img alt="../../_images/nuttxfs_page_0.png" src="../../_images/nuttxfs_page_0.png" />
+<img alt="../../_images/nuttxfs_page_1.png" src="../../_images/nuttxfs_page_1.png" />
+<img alt="../../_images/nuttxfs_page_2.png" src="../../_images/nuttxfs_page_2.png" />
</section>
</div>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
- <a href="mnemofs.html" class="btn btn-neutral float-left" title="MNEMOFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="nxffs.html" class="btn btn-neutral float-right" title="NXFFS" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ <a href="inotify.html" class="btn btn-neutral float-left" title="Inotify" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="nxflat.html" class="btn btn-neutral float-right" title="NuttX FLAT Binary Format (NXFLAT)" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
<hr/>
diff --git a/content/docs/latest/components/filesystem/nxffs.html b/content/docs/latest/components/filesystem/nxffs.html
index 9c54211be..9cb4cedc2 100644
--- a/content/docs/latest/components/filesystem/nxffs.html
+++ b/content/docs/latest/components/filesystem/nxffs.html
@@ -43,7 +43,7 @@
<script src="../../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
- <link rel="next" title="Partition Table" href="partition.html" />
+ <link rel="next" title="How NXFFS works" href="how_nxffs_works.html" />
<link rel="prev" title="NFS" href="nfs.html" />
</head>
@@ -147,6 +147,7 @@
<li class="toctree-l5"><a class="reference internal" href="#multiple-writers">Multiple Writers</a></li>
<li class="toctree-l5"><a class="reference internal" href="#ioctls">ioctls</a></li>
<li class="toctree-l5"><a class="reference internal" href="#things-to-do">Things to Do</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#further-reference">Further reference</a></li>
</ul>
</li>
<li class="toctree-l4"><a class="reference internal" href="partition.html">Partition Table</a></li>
@@ -161,6 +162,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -386,6 +391,14 @@ size of a previously written file. There is some fragmentary logic in
place but even this is conditioned out with __NO_TRUNCATE_SUPPORT__.</p></li>
</ul>
</section>
+<section id="further-reference">
+<h2>Further reference<a class="headerlink" href="#further-reference" title="Permalink to this heading"></a></h2>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="how_nxffs_works.html">How NXFFS works</a></li>
+</ul>
+</div>
+</section>
</section>
@@ -393,7 +406,7 @@ place but even this is conditioned out with __NO_TRUNCATE_SUPPORT__.</p></li>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
<a href="nfs.html" class="btn btn-neutral float-left" title="NFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="partition.html" class="btn btn-neutral float-right" title="Partition Table" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ <a href="how_nxffs_works.html" class="btn btn-neutral float-right" title="How NXFFS works" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
<hr/>
diff --git a/content/docs/latest/components/filesystem/nxflat.html b/content/docs/latest/components/filesystem/nxflat.html
new file mode 100644
index 000000000..61e667d70
--- /dev/null
+++ b/content/docs/latest/components/filesystem/nxflat.html
@@ -0,0 +1,409 @@
+<!--
+ Documentation/_templates/layout.html
+
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership. The
+ ASF licenses this file to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance with the
+ License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ License for the specific language governing permissions and limitations
+ under the License.
+-->
+
+
+
+<!DOCTYPE html>
+<html class="writer-html5" lang="en">
+<head>
+ <meta charset="utf-8" /><meta name="generator" content="Docutils 0.18.1: http://docutils.sourceforge.net/" />
+
+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+ <title>NuttX FLAT Binary Format (NXFLAT) — NuttX latest documentation</title>
+ <link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
+ <link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
+ <link rel="stylesheet" type="text/css" href="../../_static/copybutton.css" />
+ <link rel="stylesheet" type="text/css" href="../../_static/custom.css" />
+
+
+ <link rel="shortcut icon" href="../../_static/favicon.ico"/>
+ <script src="../../_static/jquery.js"></script>
+ <script src="../../_static/_sphinx_javascript_frameworks_compat.js"></script>
+ <script data-url_root="../../" id="documentation_options" src="../../_static/documentation_options.js"></script>
+ <script src="../../_static/doctools.js"></script>
+ <script src="../../_static/sphinx_highlight.js"></script>
+ <script src="../../_static/clipboard.min.js"></script>
+ <script src="../../_static/copybutton.js"></script>
+ <script src="../../_static/js/theme.js"></script>
+ <link rel="index" title="Index" href="../../genindex.html" />
+ <link rel="search" title="Search" href="../../search.html" />
+ <link rel="next" title="Pseudo File System" href="pseudofs.html" />
+ <link rel="prev" title="Nuttx FS" href="nuttxfs.html" />
+</head>
+
+<body class="wy-body-for-nav">
+ <div class="wy-grid-for-nav">
+ <nav data-toggle="wy-nav-shift" class="wy-nav-side">
+ <div class="wy-side-scroll">
+ <div class="wy-side-nav-search" >
+
+ <a href="../../index.html" class="icon icon-home"> NuttX
+
+
+
+ </a>
+
+ <!-- this version selector is quite ugly, should be probably replaced by something
+ more modern -->
+
+ <div class="version-selector">
+ <select onchange="javascript:location.href = this.value;">
+
+ <option value="../../../latest" selected="selected">latest</option>
+
+ <option value="../../../10.0.0" >10.0.0</option>
+
+ <option value="../../../10.0.1" >10.0.1</option>
+
+ <option value="../../../10.1.0" >10.1.0</option>
+
+ <option value="../../../10.2.0" >10.2.0</option>
+
+ <option value="../../../10.3.0" >10.3.0</option>
+
+ <option value="../../../11.0.0" >11.0.0</option>
+
+ <option value="../../../12.0.0" >12.0.0</option>
+
+ <option value="../../../12.1.0" >12.1.0</option>
+
+ <option value="../../../12.2.0" >12.2.0</option>
+
+ <option value="../../../12.2.1" >12.2.1</option>
+
+ <option value="../../../12.3.0" >12.3.0</option>
+
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+
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+
+ <option value="../../../12.5.1" >12.5.1</option>
+
+ <option value="../../../12.6.0" >12.6.0</option>
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+ <option value="../../../12.7.0" >12.7.0</option>
+
+ </select>
+ </div>
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+<li class="toctree-l4 current"><a class="current reference internal" href="#">NuttX FLAT Binary Format (NXFLAT)</a><ul>
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+
+ <section id="nuttx-flat-binary-format-nxflat">
+<h1>NuttX FLAT Binary Format (NXFLAT)<a class="headerlink" href="#nuttx-flat-binary-format-nxflat" title="Permalink to this heading"></a></h1>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>Migrated from:
+<a class="reference external" href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139630111">https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139630111</a></p>
+</div>
+<section id="overview">
+<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this heading"></a></h2>
+<p>NuttX supports a configurable <a class="reference internal" href="../binfmt.html"><span class="doc">binary loader</span></a> .
+This binary loader supports loading and executing binary objects from
+the file system.
+The NuttX binary loader is capable of supporting multiple binary formats.
+One of of those binary formats is NXFLAT, the top of this Wiki page.</p>
+<p>NXFLAT is a customized and simplified version of binary format
+implemented a few years ago called XFLAT.
+With the NXFLAT binary format you will be able to do the following:</p>
+<ul class="simple">
+<li><p>Place separately linked programs in a file system, and</p></li>
+<li><p>Execute those programs by dynamically linking them to the
+base NuttX code.</p></li>
+</ul>
+<p>This allows you to extend the NuttX base code after it has been
+written into FLASH.
+One motivation for implementing NXFLAT is support clean CGI under
+an HTTPD server.</p>
+<p>This feature is especially attractive when combined with the
+NuttX ROMFS support:
+ROMFS allows you to execute programs in place (XIP) in flash
+without copying anything other than the .data section to RAM.
+In fact, the initial NXFLAT release only worked on ROMFS.
+Later extensions also support execution NXFLAT binaries from
+an SRAM copy as well.</p>
+<p>This NuttX feature includes:</p>
+<ul class="simple">
+<li><p>A dynamic loader that is built into the NuttX core (See SVN).</p></li>
+<li><p>Minor changes to RTOS to support position independent code, and</p></li>
+<li><p>A linker to bind ELF binaries to produce the
+NXFLAT binary format (See SVN).</p></li>
+</ul>
+</section>
+<section id="toolchain-compatibility-problem">
+<h2>Toolchain Compatibility Problem<a class="headerlink" href="#toolchain-compatibility-problem" title="Permalink to this heading"></a></h2>
+<section id="description">
+<h3>Description<a class="headerlink" href="#description" title="Permalink to this heading"></a></h3>
+<p>NXFLAT flat requires a specific kind of position independence.
+The ARM family of GCC toolchains has historically supported
+this method of position independence: All code addresses are
+accessed relative to the Program Counter (PC) and a special,
+<cite>PIC register</cite> (usually <code class="docutils literal notranslate"><span class="pre">r10</span></code>) is used to access all data. To
+load or store a data value, the contents of <code class="docutils literal notranslate"><span class="pre">r10</span></code>, the PIC
+base, is added to a constant, position-independent offset
+to produce the absolute address of the data.</p>
+<img alt="../../_images/nxflat-addressing.png" src="../../_images/nxflat-addressing.png" />
+<p>The <cite>Global Offset Table</cite> (GOT) is a special data structure that
+resides in D-Space. So PIC-base relative addressing may also
+be specified as GOT-Relative addressing (or <code class="docutils literal notranslate"><span class="pre">GOTOFF</span></code>). The older
+GCC 4.3.3 GCC compiler, for example, generates <code class="docutils literal notranslate"><span class="pre">GOTOFF</span></code>
+relocations to the constant strings, like:</p>
+<div class="highlight-asm notranslate"><div class="highlight"><pre><span></span><span class="nl">.L3:</span>
+<span class="w"> </span><span class="na">.word</span><span class="w"> </span><span class="no">.LC0</span><span class="p">(</span><span class="no">GOTOFF</span><span class="p">)</span>
+<span class="w"> </span><span class="na">.word</span><span class="w"> </span><span class="no">.LC1</span><span class="p">(</span><span class="no">GOTOFF</span><span class="p">)</span>
+<span class="w"> </span><span class="na">.word</span><span class="w"> </span><span class="no">.LC2</span><span class="p">(</span><span class="no">GOTOFF</span><span class="p">)</span>
+<span class="w"> </span><span class="na">.word</span><span class="w"> </span><span class="no">.LC3</span><span class="p">(</span><span class="no">GOTOFF</span><span class="p">)</span>
+<span class="w"> </span><span class="na">.word</span><span class="w"> </span><span class="no">.LC4</span><span class="p">(</span><span class="no">GOTOFF</span><span class="p">)</span>
+</pre></div>
+</div>
+<p>Where <code class="docutils literal notranslate"><span class="pre">.LC0</span></code>, <code class="docutils literal notranslate"><span class="pre">.LC1</span></code>, <code class="docutils literal notranslate"><span class="pre">.LC2</span></code>, <code class="docutils literal notranslate"><span class="pre">.LC3</span></code>, and <code class="docutils literal notranslate"><span class="pre">.LC4</span></code> are the labels
+corresponding to strings in the <code class="docutils literal notranslate"><span class="pre">.rodata.str1.1</span></code> section. One
+consequence of this is that <code class="docutils literal notranslate"><span class="pre">.rodata</span></code> must reside in D-Space
+since it will addressed relative to the GOT (see the section
+entitled “Read-Only Data in RAM” here).</p>
+<p>The newer 4.6.3 GCC compiler, however, generated PC relative
+relocations to these same strings:</p>
+<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>.L2:
+ .word .LC0-(.LPIC0+4)
+ .word .LC1-(.LPIC1+4)
+ .word .LC2-(.LPIC2+4)
+ .word .LC3-(.LPIC4+4)
+ .word .LC4-(.LPIC5+4)
+</pre></div>
+</div>
+<p>These are <cite>PC-Relative</cite> relocations. This means that the string
+data is address not by an offset relative to the PIC register
+(<code class="docutils literal notranslate"><span class="pre">r10</span></code>) but to the program count (PC). This is good and bad. This
+is good because it means that <code class="docutils literal notranslate"><span class="pre">.rodata.str1.1</span></code> must now can now
+reside in FLASH with <code class="docutils literal notranslate"><span class="pre">.text</span></code> and can be accessed using PC-relative
+addressing. That can be accomplished by simply moving the <code class="docutils literal notranslate"><span class="pre">.rodata</span></code>
+from the <code class="docutils literal notranslate"><span class="pre">.data</span></code> section to the <code class="docutils literal notranslate"><span class="pre">.text</span></code> section in the linker script.
+The NXFLAT linker script is located at
+<code class="docutils literal notranslate"><span class="pre">nuttx/binfmt/libnxflat/gnu-nxflat-?.ld</span></code>. <strong>NOTE</strong>: There are two
+linker scripts located at <code class="docutils literal notranslate"><span class="pre">nuttx/binfmt/libnxflat/</span></code>:</p>
+<ol class="arabic simple">
+<li><p><code class="docutils literal notranslate"><span class="pre">binfmt/libnxflat/gnu-nxflat-gotoff.ld.</span></code> Older versions
+of GCC (at least up to GCC 4.3.3), use GOT-relative
+addressing to access RO data. In that case, read-only
+data (<code class="docutils literal notranslate"><span class="pre">.rodata</span></code>) must reside in D-Space and this linker
+script should be used.</p></li>
+<li><p><code class="docutils literal notranslate"><span class="pre">binfmt/libnxflat/gnu-nxflat-pcrel.ld.</span></code> Newer versions
+of GCC (at least as of GCC 4.6.3), use PC-relative
+addressing to access RO data. In that case, read-only
+data (<code class="docutils literal notranslate"><span class="pre">.rodata</span></code>) must reside in I-Space and this linker
+script should be used.</p></li>
+</ol>
+<p>But this is very bad because a lot of NXFLAT is now broken.
+For it appears that not just constant strings, but that all
+data may now be referenced using PC-relative addressing to
+.bss and .data values. I do not yet know the extent of this
+problem or the direction that GCC is going but certainly
+version 4.6.3 cannot be used with NXFLAT.</p>
+<p>The workaround for now is to use the older, 4.3.3 OABI
+compiler. In the long run, this might spell the end
+to NXFLAT.</p>
+</section>
+<section id="update-restored-gcc-support">
+<h3>Update: Restored GCC Support<a class="headerlink" href="#update-restored-gcc-support" title="Permalink to this heading"></a></h3>
+<p>This post was pointed out by Michael Jung:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>MCU:<span class="w"> </span>STM32F4<span class="w"> </span><span class="o">(</span>ARM<span class="w"> </span>Cortex<span class="w"> </span>M4<span class="o">)</span>
+Build<span class="w"> </span>environment:<span class="w"> </span>arm-none-eabi-gcc<span class="w"> </span><span class="m">4</span>.8.4<span class="w"> </span><span class="m">20140725</span>
+
+My<span class="w"> </span>goal<span class="w"> </span>is<span class="w"> </span>to<span class="w"> </span>build<span class="w"> </span>an<span class="w"> </span>image<span class="w"> </span>that<span class="w"> </span>can<span class="w"> </span>be<span class="w"> </span>run<span class="w"> </span>from<span class="w"> </span>any<span class="w"> </span>properly-aligned
+offset<span class="w"> </span><span class="k">in</span><span class="w"> </span>internal<span class="w"> </span>flash<span class="w"> </span><span class="o">(</span>i.e.,<span class="w"> </span>position-independent<span class="o">)</span>.<span class="w"> </span>I<span class="w"> </span>found<span class="w"> </span>the
+following<span class="w"> </span><span class="nb">set</span><span class="w"> </span>of<span class="w"> </span>gcc<span class="w"> </span>flags<span class="w"> </span>that<span class="w"> </span>achieves<span class="w"> </span>this<span class="w"> </span>goal:
+
+<span class="w"> </span><span class="c1"># Generate position independent code.</span>
+<span class="w"> </span>-fPIC
+
+<span class="w"> </span><span class="c1"># Access bss via the GOT.</span>
+<span class="w"> </span>-mno-pic-data-is-text-relative
+
+<span class="w"> </span><span class="c1"># GOT is not PC-relative; store GOT location in a register.</span>
+<span class="w"> </span>-msingle-pic-base
+
+<span class="w"> </span><span class="c1"># Store GOT location in r9.</span>
+<span class="w"> </span>-mpic-register<span class="o">=</span>r9
+</pre></div>
+</div>
+<p>Reference: <a class="reference external" href="https://gcc.gnu.org/ml/gcc-help/2015-07/msg00027.html">https://gcc.gnu.org/ml/gcc-help/2015-07/msg00027.html</a></p>
+<p>Michael has verified that <code class="docutils literal notranslate"><span class="pre">-mno-pic-data-is-text-relative</span></code> is,
+indeed, a solution to the above NXFLAT problem in newer
+compilers. You simply need to modify the board Make.defs
+file like:</p>
+<ol class="arabic simple">
+<li><p>ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10</p></li>
+</ol>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>+ARCHPICFLAGS<span class="w"> </span><span class="o">=</span><span class="w"> </span>-fpic<span class="w"> </span>-msingle-pic-base<span class="w"> </span>-mpic-register<span class="o">=</span>r10<span class="w"> </span>-mno-pic-data-is-text-relative
+</pre></div>
+</div>
+<p>NOTE the minor difference from the post: NuttX uses <code class="docutils literal notranslate"><span class="pre">r10</span></code> as
+the PIC base register by default in all configurations.</p>
+<p>See this <a class="reference external" href="https://groups.google.com/forum/">thread</a> for additional information.</p>
+</section>
+<section id="references">
+<h3>References<a class="headerlink" href="#references" title="Permalink to this heading"></a></h3>
+<ul class="simple">
+<li><p><a class="reference internal" href="../nxflat.html"><span class="doc">NXFLAT</span></a></p></li>
+<li><p><a class="reference external" href="http://xflat.sourceforge.net/">XFLATFLAT</a></p></li>
+<li><p><a class="reference external" href="http://retired.beyondlogic.org/uClinux/bflt.htm">FLAT</a></p></li>
+<li><p><a class="reference external" href="http://romfs.sourceforge.net/">ROMFS</a></p></li>
+</ul>
+</section>
+</section>
+</section>
+
+
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diff --git a/content/docs/latest/components/filesystem/partition.html b/content/docs/latest/components/filesystem/partition.html
index 310e653d3..c419afece 100644
--- a/content/docs/latest/components/filesystem/partition.html
+++ b/content/docs/latest/components/filesystem/partition.html
@@ -44,7 +44,7 @@
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
<link rel="next" title="PROCFS" href="procfs.html" />
- <link rel="prev" title="NXFFS" href="nxffs.html" />
+ <link rel="prev" title="How NXFFS works" href="how_nxffs_works.html" />
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<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -383,7 +387,7 @@ String between “%s %zx %zx” and “LF” will be ignored(eg. CR, or some com
</div>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
- <a href="nxffs.html" class="btn btn-neutral float-left" title="NXFFS" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="how_nxffs_works.html" class="btn btn-neutral float-left" title="How NXFFS works" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
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diff --git a/content/docs/latest/components/filesystem/procfs.html b/content/docs/latest/components/filesystem/procfs.html
index df475f5f0..85c17c80c 100644
--- a/content/docs/latest/components/filesystem/procfs.html
+++ b/content/docs/latest/components/filesystem/procfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/pseudofs.html b/content/docs/latest/components/filesystem/pseudofs.html
new file mode 100644
index 000000000..679ee5b6a
--- /dev/null
+++ b/content/docs/latest/components/filesystem/pseudofs.html
@@ -0,0 +1,424 @@
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+<li class="toctree-l4"><a class="reference internal" href="hostfs.html">Host File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="littlefs.html">LITTLEFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="mmap.html">File mapping emulation (mmap)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="mnemofs.html">MNEMOFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nfs.html">NFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxffs.html">NXFFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="partition.html">Partition Table</a></li>
+<li class="toctree-l4"><a class="reference internal" href="procfs.html">PROCFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="romfs.html">ROMFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="rpmsgfs.html">RPMSG File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="smartfs.html">SMARTFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="shmfs.html">Shared Memory File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="spiffs.html">SPIFFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="tmpfs.html">TMPFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="unionfs.html">Union File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
+<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4 current"><a class="current reference internal" href="#">Pseudo File System</a><ul>
+<li class="toctree-l5"><a class="reference internal" href="#overview">Overview</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#faq">FAQ</a></li>
+</ul>
+</li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
+<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
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+
+ <section id="pseudo-file-system">
+<h1>Pseudo File System<a class="headerlink" href="#pseudo-file-system" title="Permalink to this heading"></a></h1>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>Migrated from:
+<a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/Pseudo+File+System">https://cwiki.apache.org/confluence/display/NUTTX/Pseudo+File+System</a></p>
+</div>
+<section id="overview">
+<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this heading"></a></h2>
+<section id="pseudo-root-file-system">
+<h3>Pseudo Root File System<a class="headerlink" href="#pseudo-root-file-system" title="Permalink to this heading"></a></h3>
+<p>NuttX includes an optional, scalable file system. As a minimum, this may
+be a simple in-memory, pseudo file system. This is an in-memory file
+system because it does not require any storage medium or block driver
+support. Rather, file system contents are generated on-the-fly as
+referenced via standard file system operations (open, close, read,
+write, etc.). In this sense, the file system is a pseudo file system
+(in the same sense that the Linux <code class="docutils literal notranslate"><span class="pre">/proc</span></code> file system is also referred
+to as a pseudo file system).</p>
+<p>Any user supplied data or logic can be accessed via the pseudo-file
+system. Built in support is provided for character, block, and MTD
+(Memory Technology Device) drivers in the <code class="docutils literal notranslate"><span class="pre">/dev</span></code> pseudo file system
+directory.</p>
+</section>
+<section id="special-files">
+<h3>Special Files<a class="headerlink" href="#special-files" title="Permalink to this heading"></a></h3>
+<p>NuttX does not support special files in the way that, say,
+Linux does. In fact, it is more correct to say that NuttX
+file systems do not support special files at all.</p>
+<p>NuttX does, however, support Linux-like special <cite>device node</cite>,
+character driver, and block driver files (as well as NuttX-specific
+mountpoint, named semaphore, message queue, and shared memory
+special files). However, these are not special files in sense
+that the term special files is used in a POSIX environment: In
+NuttX these special files may <cite>only</cite> be created in the root
+pseudo-file system. For the case of device nodes, see <a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/Device+Nodes">Device
+Nodes</a>
+for further information.</p>
+<p>In NuttX, the underlying principle is that all <cite>named resources</cite>
+appear as special files in the root pseudo-file system and are
+managed by the VFS.</p>
+</section>
+<section id="mounted-volumes">
+<h3>Mounted Volumes<a class="headerlink" href="#mounted-volumes" title="Permalink to this heading"></a></h3>
+<p>The simple in-memory file system can be extended by mounting block
+devices that provide access to true file systems backed up via
+some mass storage device. NuttX supports the standard mount()
+command that allows a block driver to be bound to a mount point
+within the pseudo file system and to a file system. At present,
+NuttX supports the standard VFAT and ROMFS file systems, a
+special, wear-levelling NuttX FLASH File System (NXFFS), as well
+as a Network File System client (NFS version 3, UDP).</p>
+</section>
+<section id="comparison-to-linux">
+<h3>Comparison to Linux<a class="headerlink" href="#comparison-to-linux" title="Permalink to this heading"></a></h3>
+<p>From a programming perspective, the NuttX file system appears
+very similar to a Linux file system. However, there is a
+fundamental difference: The NuttX root file system is a pseudo
+file system and true file systems may be mounted in the pseudo
+file system. In the typical Linux installation by comparison,
+the Linux root file system is a true file system and pseudo
+file systems may be mounted in the true, root file system.
+The approach selected by NuttX is intended to support greater
+scalability from the very tiny platform to the moderate platform.</p>
+</section>
+</section>
+<section id="faq">
+<h2>FAQ<a class="headerlink" href="#faq" title="Permalink to this heading"></a></h2>
+<p><strong>Question</strong>: I’m wondering why I can’t create a directory. If
+I try to create a dir.</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>mkdir<span class="w"> </span>/mnt
+</pre></div>
+</div>
+<p>I get this,</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>nsh:<span class="w"> </span>mkdir:<span class="w"> </span>mkdir<span class="w"> </span>failed:<span class="w"> </span><span class="m">2</span>
+</pre></div>
+</div>
+<p>although if I do this it creates both directories, mnt and sda</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>mount<span class="w"> </span>-t<span class="w"> </span>vfat<span class="w"> </span>/dev/mmcsd0<span class="w"> </span>/mnt/sda
+</pre></div>
+</div>
+<p><strong>Answer</strong>: This is because the top level directories are part of a
+<cite>pseudo-filesystem</cite> – like the Linux <code class="docutils literal notranslate"><span class="pre">proc/</span></code> or <code class="docutils literal notranslate"><span class="pre">sys/</span></code> file systems.
+But the NuttX pseudo-file system begins at the top level <code class="docutils literal notranslate"><span class="pre">/</span></code>.</p>
+<p>What that really means is that you do must have
+<code class="docutils literal notranslate"><span class="pre">CONFIG_DISABLE_PSEUDOFS_OPERATIONS</span></code> selected. Because you
+can normally create directories in the pseudo-filesystem
+with not problem:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>NuttShell<span class="w"> </span><span class="o">(</span>NSH<span class="o">)</span><span class="w"> </span>NuttX-9.0.0
+nsh><span class="w"> </span>mkdir<span class="w"> </span>/mnt
+nsh><span class="w"> </span>ls
+/:
+dev/
+etc/
+mnt/
+proc/
+tmp/
+nsh><span class="w"> </span>ls<span class="w"> </span>mnt
+/mnt:
+nsh>
+</pre></div>
+</div>
+<p>But lets assume that you do have operations on the pseudo-file
+system disabled. Why doesn’t it work? There is no <cite>real</cite> media
+there so you cannot create a file there or create any directories
+there. The <code class="docutils literal notranslate"><span class="pre">mount</span></code> command is special, it knows how to create mount
+points in the pseudo-file system.</p>
+<p>The pseudo-file system is just a tree structure in RAM.
+It serves two purposes: (1) you don’t have to have a real
+file system to use NuttX.
+It comes up out-of-the-box with usable (but limited)
+pseudo-file system. That allows a little more civilized
+programming environment on even very resource limited MCUs.
+And (2) this pseudo-file system is a place where all special
+NuttX files are retained: Character drivers, block drivers,
+and mount points.</p>
+<p>The NuttX top-level pseudo-filesystem creates the <cite>illusion</cite> of
+directories and provides a consistent, seamless semantic for
+interacting with mounted file systems. If there is a file
+called <code class="docutils literal notranslate"><span class="pre">hello.txt</span></code> in your volume mounted at <code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code>, then:</p>
+<p><code class="docutils literal notranslate"><span class="pre">/mnt</span></code> - is a <cite>node</cite> in the pseudo-filesystem that does
+nothing but contain the name mnt and provide links
+to things <cite>under</cite> <code class="docutils literal notranslate"><span class="pre">mnt</span></code>.</p>
+<p><code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code> - This refers to a node that contains the name
+sda that can be found <cite>under</cite> the node with the name mnt.
+This node is a special <cite>mountpoint node</cite> in the pseudo-filesystem.
+It contains the methods needed to interact will real file system.
+Everything <cite>below</cite> <code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code> is in the physical media.</p>
+<p><code class="docutils literal notranslate"><span class="pre">/mnt/sda/hello.txt</span></code> - This, then refers to the file
+<code class="docutils literal notranslate"><span class="pre">hello.txt</span></code> at the relative path <code class="docutils literal notranslate"><span class="pre">hello.txt</span></code> on the mounted media.
+The transition from the pseudo-filesystem to the
+real media is seamless.</p>
+<p>This is a little different from Linux: Linux always
+has to boot up with a <cite>real</cite> file system – even if it
+is only a initrd RAM disk.
+In Linux, these special files (links, drivers, pipes,
+etc.) reside on real media and can reside in any
+Linux-compatible filesystem.</p>
+<p>Normal <code class="docutils literal notranslate"><span class="pre">mkdir</span></code> can only work if there is a <cite>real</cite> filesystem
+at the location. There are no real directories in the
+pseudo-filesystem. The pseudo-filesystem does support
+<cite>nodes</cite> that look like directories and have some of the
+properties of directories (like the node <code class="docutils literal notranslate"><span class="pre">/mnt</span></code> mentioned
+above). But this is really an illusion.</p>
+<p>If <code class="docutils literal notranslate"><span class="pre">CONFIG_DISABLE_PSEUDOFS_OPERATIONS</span></code> is not enabled,
+then NuttX adds the capability to create new, empty <cite>nodes</cite>
+in the pseudo-filesystem using <code class="docutils literal notranslate"><span class="pre">mkdir</span></code>, completing the illusion.</p>
+<p>[On the other hand, all directories are really an
+<cite>illusion</cite> in a way and I suppose that in that sense
+these nodes the pseudo-filesystem are just as <cite>real</cite>
+as any other directory.]</p>
+<p>After you mount the SD card at <code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code>, then you can do:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>mkdir<span class="w"> </span>/mnt/sda/newdir
+</pre></div>
+</div>
+<p>That should work fine and should create a directory at
+the relative path <code class="docutils literal notranslate"><span class="pre">newdir</span></code> in the mounted volume.</p>
+<p>There are a few other special NSH commands like mount that
+can change the pseudo-filesystem. Like <code class="docutils literal notranslate"><span class="pre">losetup</span></code>, <code class="docutils literal notranslate"><span class="pre">mkfifo</span></code>,
+<code class="docutils literal notranslate"><span class="pre">mkrd</span></code>, <code class="docutils literal notranslate"><span class="pre">umount</span></code>, etc.
+In fact, these commands <cite>only</cite> work in the pseudo-filesystem.
+Try them in <code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code>… they won’t work.</p>
+<p>But none of the <cite>normal</cite> commands that modify files or directories
+will work in the pseudo-filesystem: <code class="docutils literal notranslate"><span class="pre">mkdir</span></code>, <code class="docutils literal notranslate"><span class="pre">mv</span></code>, <code class="docutils literal notranslate"><span class="pre">rm</span></code>, <code class="docutils literal notranslate"><span class="pre">rmdir</span></code>.
+These all require real media. They will not work in the
+pseudo-filesystem, but will work in <code class="docutils literal notranslate"><span class="pre">/mnt/sda</span></code>.</p>
+<p>And trying to pipe to something in the pseudo-filesystem
+will also fail. You cannot do this, for example:</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>NuttShell<span class="w"> </span><span class="o">(</span>NSH<span class="o">)</span><span class="w"> </span>NuttX-6.20
+nsh><span class="w"> </span>cat<span class="w"> </span><span class="s2">"Hello, World!"</span><span class="w"> </span>>/hello.text
+nsh:<span class="w"> </span>cat:<span class="w"> </span>open<span class="w"> </span>failed:<span class="w"> </span><span class="m">22</span>
+nsh>
+</pre></div>
+</div>
+<p>See also NxFileSystem in
+<a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/Porting+Guide">Porting Guide</a></p>
+</section>
+</section>
+
+
+ </div>
+ </div>
+ <footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
+ <a href="nxflat.html" class="btn btn-neutral float-left" title="NuttX FLAT Binary Format (NXFLAT)" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="special_files_dev_num.html" class="btn btn-neutral float-right" title="Special Files and Device Numbers" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ </div>
+
+ <hr/>
+
+ <div role="contentinfo">
+ <p>© Copyright 2023, The Apache Software Foundation.</p>
+ </div>
+
+
+
+</footer>
+ </div>
+ </div>
+ </section>
+ </div>
+ <script>
+ jQuery(function () {
+ SphinxRtdTheme.Navigation.enable(true);
+ });
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+
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+</html>
\ No newline at end of file
diff --git a/content/docs/latest/components/filesystem/romfs.html b/content/docs/latest/components/filesystem/romfs.html
index 9f79bdc09..86b3bf1cf 100644
--- a/content/docs/latest/components/filesystem/romfs.html
+++ b/content/docs/latest/components/filesystem/romfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/rpmsgfs.html b/content/docs/latest/components/filesystem/rpmsgfs.html
index 4fd683abc..858f9dc01 100644
--- a/content/docs/latest/components/filesystem/rpmsgfs.html
+++ b/content/docs/latest/components/filesystem/rpmsgfs.html
@@ -156,6 +156,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/shmfs.html b/content/docs/latest/components/filesystem/shmfs.html
index 6db5e379e..b5f6ed26c 100644
--- a/content/docs/latest/components/filesystem/shmfs.html
+++ b/content/docs/latest/components/filesystem/shmfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/smartfs.html b/content/docs/latest/components/filesystem/smartfs.html
index eedab4ecc..a1dad5b14 100644
--- a/content/docs/latest/components/filesystem/smartfs.html
+++ b/content/docs/latest/components/filesystem/smartfs.html
@@ -166,6 +166,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/zipfs.html b/content/docs/latest/components/filesystem/special_files_dev_num.html
similarity index 52%
copy from content/docs/latest/components/filesystem/zipfs.html
copy to content/docs/latest/components/filesystem/special_files_dev_num.html
index 830318c4e..a311612d3 100644
--- a/content/docs/latest/components/filesystem/zipfs.html
+++ b/content/docs/latest/components/filesystem/special_files_dev_num.html
@@ -25,7 +25,7 @@
<meta charset="utf-8" /><meta name="generator" content="Docutils 0.18.1: http://docutils.sourceforge.net/" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <title>ZipFS — NuttX latest documentation</title>
+ <title>Special Files and Device Numbers — NuttX latest documentation</title>
<link rel="stylesheet" type="text/css" href="../../_static/pygments.css" />
<link rel="stylesheet" type="text/css" href="../../_static/css/theme.css" />
<link rel="stylesheet" type="text/css" href="../../_static/copybutton.css" />
@@ -43,8 +43,8 @@
<script src="../../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
- <link rel="next" title="Inotify" href="inotify.html" />
- <link rel="prev" title="User file system" href="userfs.html" />
+ <link rel="next" title="NuttX libraries" href="../libs/index.html" />
+ <link rel="prev" title="Pseudo File System" href="pseudofs.html" />
</head>
<body class="wy-body-for-nav">
@@ -150,12 +150,19 @@
<li class="toctree-l4"><a class="reference internal" href="tmpfs.html">TMPFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="unionfs.html">Union File System</a></li>
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
-<li class="toctree-l4 current"><a class="current reference internal" href="#">ZipFS</a><ul>
-<li class="toctree-l5"><a class="reference internal" href="#config">CONFIG</a></li>
-<li class="toctree-l5"><a class="reference internal" href="#example">Example</a></li>
+<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4 current"><a class="current reference internal" href="#">Special Files and Device Numbers</a><ul>
+<li class="toctree-l5"><a class="reference internal" href="#special-files-in-unix-like-file-systems">Special Files in Unix-like File Systems</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#special-files-in-other-file-systems">Special Files in Other File Systems</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#special-files-and-nuttx">Special Files and NuttX</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#device-files-and-device-numbers">Device Files and Device Numbers</a></li>
+<li class="toctree-l5"><a class="reference internal" href="#named-resources">Named Resources</a></li>
</ul>
</li>
-<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
@@ -200,9 +207,9 @@
<li><a href="../../index.html" class="icon icon-home" aria-label="Home"></a></li>
<li class="breadcrumb-item"><a href="../index.html">OS Components</a></li>
<li class="breadcrumb-item"><a href="index.html">NuttX File System</a></li>
- <li class="breadcrumb-item active">ZipFS</li>
+ <li class="breadcrumb-item active">Special Files and Device Numbers</li>
<li class="wy-breadcrumbs-aside">
- <a href="../../_sources/components/filesystem/zipfs.rst.txt" rel="nofollow"> View page source</a>
+ <a href="../../_sources/components/filesystem/special_files_dev_num.rst.txt" rel="nofollow"> View page source</a>
</li>
</ul>
<hr/>
@@ -210,37 +217,109 @@
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
- <section id="zipfs">
-<h1>ZipFS<a class="headerlink" href="#zipfs" title="Permalink to this heading"></a></h1>
-<p>Zipfs is a read only file system that mounts a zip file as a NuttX file system through the NuttX VFS interface.
-This allows users to read files while decompressing them, without requiring additional storage space.</p>
-<section id="config">
-<h2>CONFIG<a class="headerlink" href="#config" title="Permalink to this heading"></a></h2>
-<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">CONFIG_FS_ZIPFS</span><span class="o">=</span>y
-<span class="nv">CONFIG_LIB_ZLIB</span><span class="o">=</span>y
-</pre></div>
+ <section id="special-files-and-device-numbers">
+<h1>Special Files and Device Numbers<a class="headerlink" href="#special-files-and-device-numbers" title="Permalink to this heading"></a></h1>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<p>Migrated from:
+<a class="reference external" href="https://cwiki.apache.org/confluence/display/NUTTX/Special+Files+and+Device+Numbers">https://cwiki.apache.org/confluence/display/NUTTX/Special+Files+and+Device+Numbers</a></p>
</div>
+<section id="special-files-in-unix-like-file-systems">
+<h2>Special Files in Unix-like File Systems<a class="headerlink" href="#special-files-in-unix-like-file-systems" title="Permalink to this heading"></a></h2>
+<p>In Unix-like operating systems, a <cite>special file</cite> is an interface for
+a device driver that appears in a file system as if it were an
+ordinary file. Special files are a feature built into Unix-like
+file systems such as EXT2.</p>
+<p>See also <a class="reference external" href="https://en.wikipedia.org/wiki/Device_file">Wikipedia article</a>.</p>
+</section>
+<section id="special-files-in-other-file-systems">
+<h2>Special Files in Other File Systems<a class="headerlink" href="#special-files-in-other-file-systems" title="Permalink to this heading"></a></h2>
+<p>Some other file systems systems, such as NTFS, also have some more
+limited and incompatible notion of special files. Others, such as
+FAT, do not have any such concept. Unix-like environments such as
+Cygwin that run on these other file systems have to do things a
+little differently: The have to emulate special files using the
+resources of the file system that they operate on. This may mean
+creating <cite>regular</cite> files with special naming conventions or with
+special content that can be used to emulate the behavior of
+special files.</p>
</section>
-<section id="example">
-<h2>Example<a class="headerlink" href="#example" title="Permalink to this heading"></a></h2>
-<ol class="arabic simple">
-<li><p><code class="docutils literal notranslate"><span class="pre">./tools/configure.sh</span> <span class="pre">sim:zipfs</span></code> build sim platform with zipfs support.</p></li>
-<li><p><code class="docutils literal notranslate"><span class="pre">make</span></code> build NuttX.</p></li>
-<li><p><code class="docutils literal notranslate"><span class="pre">./nuttx</span></code> run NuttX.</p></li>
-<li><p><code class="docutils literal notranslate"><span class="pre">nsh></span> <span class="pre">mount</span> <span class="pre">-t</span> <span class="pre">hostfs</span> <span class="pre">-o</span> <span class="pre">/home/<your</span> <span class="pre">host</span> <span class="pre">name>/work</span> <span class="pre">/host</span></code> mount host directory to <code class="docutils literal notranslate"><span class="pre">/host</span></code>.</p></li>
-<li><p><code class="docutils literal notranslate"><span class="pre">nsh></span> <span class="pre">mount</span> <span class="pre">-t</span> <span class="pre">zipfs</span> <span class="pre">-o</span> <span class="pre">/host/test.zip</span> <span class="pre">/zip</span></code> mount zip file to <code class="docutils literal notranslate"><span class="pre">/zipfs</span></code>.</p></li>
-<li><p>Use cat/ls command to test.</p></li>
-</ol>
-<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>nsh><span class="w"> </span>ls<span class="w"> </span>/zip
-/zip:
-<span class="w"> </span>a/1
-<span class="w"> </span>a/2
-nsh><span class="w"> </span>cat<span class="w"> </span>/zip/a/1
-this<span class="w"> </span>is<span class="w"> </span>zipfs<span class="w"> </span><span class="nb">test</span><span class="w"> </span><span class="m">1</span>
-nsh><span class="w"> </span>cat<span class="w"> </span>/zip/a/2
-this<span class="w"> </span>is<span class="w"> </span>zipfs<span class="w"> </span><span class="nb">test</span><span class="w"> </span><span class="m">2</span>
+<section id="special-files-and-nuttx">
+<h2>Special Files and NuttX<a class="headerlink" href="#special-files-and-nuttx" title="Permalink to this heading"></a></h2>
+<p>NuttX has done things in a very different way. There are no
+special files supported in any file system. Rather, special
+files can exist only in the NuttX <a class="reference internal" href="pseudofs.html"><span class="doc">pseudo file system</span></a>. This
+was a decision that was made in the initial design to simplify
+things for resource limited platforms yet still provide a mostly
+standard Unix-like/POSIX programming environment.</p>
+<p>What are the advantages of the special files in the NuttX
+pseudo-file system? Reduce resource usage, reduced bring-up
+requirements. What are the disadvantages? In NuttX, special
+files can only reside in the pseudo-file system.</p>
+<p>The only other consequence that I aware of is that NuttX cannot
+support the POSIX requirement for the <code class="docutils literal notranslate"><span class="pre">st_dev</span></code> field in the
+<code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">stat</span></code> structure.</p>
+</section>
+<section id="device-files-and-device-numbers">
+<h2>Device Files and Device Numbers<a class="headerlink" href="#device-files-and-device-numbers" title="Permalink to this heading"></a></h2>
+<p>In a Unix-like system, devices are access special device files.
+In a Unix-like system, device files can reside in any compatible
+file system but, by convention, are always placed in the <code class="docutils literal notranslate"><span class="pre">/dev</span></code>
+directory. NuttX achieves programming compatibility with this
+convention because the top-level, <cite>root</cite> file system is the
+pseudo-file system and <code class="docutils literal notranslate"><span class="pre">/dev</span></code> is part of the pseudo-file system.</p>
+<p>But there is a bigger difference that this. The bigger
+difference is how device drivers are registered and how
+the are accessed. The primary content of the Unix-like
+device file is simply a number, a device number, usually
+represented as type <code class="docutils literal notranslate"><span class="pre">dev_t</span></code>. The device number an encoded
+that consists of a <cite>major</cite> device number and a <cite>minor</cite> device
+number. The major device number identifies the type of
+driver and the minor number identifies an instance of a
+driver of that type.</p>
+<p>There is nothing special about these number from the sense of
+a file system. Just because device file exists with a
+certain major and minor number, that does not mean that there
+is actually any real driver instance backing that device file
+up. For example, you can create a device file from the Linux
+command line like this, knowing nothing other than major and
+minor device number:</p>
+<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">dev_t</span><span class="w"> </span><span class="nf">makedev</span><span class="p">(</span><span class="kt">unsigned</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">maj</span><span class="p">,</span><span class="w"> </span><span class="kt">unsigned</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">mi [...]
+</pre></div>
+</div>
+<p>In a Unix-like system, when you try to open a device driver
+several things must happen: The system must open the device
+file, obtain the device major and minor number, and then
+look up the driver instance in some internal <cite>registry</cite> of
+registered device drivers. If one is found, then the system
+can complete the open operation.</p>
+<p>So, the device number is then a <cite>key</cite> of some kind into a
+<cite>registry</cite> of device drivers. NuttX does this very differently:
+There are no device numbers, rather the pseudo-file system <cite>is</cite>
+the device registry! In NuttX, device files cannot be created
+by users; they can only be created by device drivers by calling
+the following, internal interface:</p>
+<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">register_driver</span><span class="p">(</span><span class="n">FAR</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="n">FAR</span><span class="w"> </sp [...]
</pre></div>
</div>
+<p>The <code class="docutils literal notranslate"><span class="pre">path</span></code> argument determines where in the pseudo-file system the
+device file should be placed. <code class="docutils literal notranslate"><span class="pre">mode</span></code> provides device file privileges.
+The <code class="docutils literal notranslate"><span class="pre">fops</span></code> and <code class="docutils literal notranslate"><span class="pre">priv</span></code> provide the internal information for the <code class="docutils literal notranslate"><span class="pre">registry</span></code>.</p>
+<p>So the when you open a device driver in NuttX, many fewer steps are
+involved: The system must still open the device file, but then
+since the pseudo-file system <cite>is</cite> the device registry, all of the
+device driver information is available and <code class="docutils literal notranslate"><span class="pre">open</span></code> operation
+completes with no further actions.</p>
+</section>
+<section id="named-resources">
+<h2>Named Resources<a class="headerlink" href="#named-resources" title="Permalink to this heading"></a></h2>
+<p>This use of the pseudo-file system in NuttX to manage device
+files is consistent with a core NuttX device philosophy: The
+NuttX VFS and the pseudo-file system in particular, are used
+to manage all named OS resources. That applies not only to
+device files and other special files but also to such things
+named message queues and named semaphores (which can be found
+in the pseudo-file system in the <code class="docutils literal notranslate"><span class="pre">/var</span></code> directory).</p>
</section>
</section>
@@ -248,8 +327,8 @@ this<span class="w"> </span>is<span class="w"> </span>zipfs<span class="w"> </sp
</div>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
- <a href="userfs.html" class="btn btn-neutral float-left" title="User file system" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="inotify.html" class="btn btn-neutral float-right" title="Inotify" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
+ <a href="pseudofs.html" class="btn btn-neutral float-left" title="Pseudo File System" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="../libs/index.html" class="btn btn-neutral float-right" title="NuttX libraries" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
<hr/>
diff --git a/content/docs/latest/components/filesystem/spiffs.html b/content/docs/latest/components/filesystem/spiffs.html
index 22101f141..ee5ede81f 100644
--- a/content/docs/latest/components/filesystem/spiffs.html
+++ b/content/docs/latest/components/filesystem/spiffs.html
@@ -155,6 +155,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/tmpfs.html b/content/docs/latest/components/filesystem/tmpfs.html
index cd52b136c..d68a3fbdb 100644
--- a/content/docs/latest/components/filesystem/tmpfs.html
+++ b/content/docs/latest/components/filesystem/tmpfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/unionfs.html b/content/docs/latest/components/filesystem/unionfs.html
index c353d7897..57042f50c 100644
--- a/content/docs/latest/components/filesystem/unionfs.html
+++ b/content/docs/latest/components/filesystem/unionfs.html
@@ -158,6 +158,10 @@
<li class="toctree-l4"><a class="reference internal" href="userfs.html">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/userfs.html b/content/docs/latest/components/filesystem/userfs.html
index 98f6fbff4..b03ea0bda 100644
--- a/content/docs/latest/components/filesystem/userfs.html
+++ b/content/docs/latest/components/filesystem/userfs.html
@@ -152,6 +152,10 @@
<li class="toctree-l4 current"><a class="current reference internal" href="#">User file system</a></li>
<li class="toctree-l4"><a class="reference internal" href="zipfs.html">ZipFS</a></li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/filesystem/zipfs.html b/content/docs/latest/components/filesystem/zipfs.html
index 830318c4e..67cf8234c 100644
--- a/content/docs/latest/components/filesystem/zipfs.html
+++ b/content/docs/latest/components/filesystem/zipfs.html
@@ -156,6 +156,10 @@
</ul>
</li>
<li class="toctree-l4"><a class="reference internal" href="inotify.html">Inotify</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nuttxfs.html">Nuttx FS</a></li>
+<li class="toctree-l4"><a class="reference internal" href="nxflat.html">NuttX FLAT Binary Format (NXFLAT)</a></li>
+<li class="toctree-l4"><a class="reference internal" href="pseudofs.html">Pseudo File System</a></li>
+<li class="toctree-l4"><a class="reference internal" href="special_files_dev_num.html">Special Files and Device Numbers</a></li>
<li class="toctree-l4"><a class="reference internal" href="index.html#fs-categories">FS Categories</a></li>
</ul>
</li>
diff --git a/content/docs/latest/components/libs/index.html b/content/docs/latest/components/libs/index.html
index 866556916..c2465420c 100644
--- a/content/docs/latest/components/libs/index.html
+++ b/content/docs/latest/components/libs/index.html
@@ -44,7 +44,7 @@
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
<link rel="next" title="libc" href="libc/index.html" />
- <link rel="prev" title="Inotify" href="../filesystem/inotify.html" />
+ <link rel="prev" title="Special Files and Device Numbers" href="../filesystem/special_files_dev_num.html" />
</head>
<body class="wy-body-for-nav">
@@ -226,7 +226,7 @@ directory from becoming cluttered with individual libraries.</p>
</div>
</div>
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
- <a href="../filesystem/inotify.html" class="btn btn-neutral float-left" title="Inotify" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
+ <a href="../filesystem/special_files_dev_num.html" class="btn btn-neutral float-left" title="Special Files and Device Numbers" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
<a href="libc/index.html" class="btn btn-neutral float-right" title="libc" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
</div>
diff --git a/content/docs/latest/index.html b/content/docs/latest/index.html
index 3c23de14e..cc0904f85 100644
--- a/content/docs/latest/index.html
+++ b/content/docs/latest/index.html
@@ -173,7 +173,7 @@ standards. Additional standard APIs from Unix and other common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments (such
as fork()).</p>
-<p>Last Updated: 11 November 24 at 00:24</p>
+<p>Last Updated: 12 November 24 at 00:24</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of Contents</span></p>
<ul class="current">
diff --git a/content/docs/latest/objects.inv b/content/docs/latest/objects.inv
index 2e899b30f..6e47735e7 100644
Binary files a/content/docs/latest/objects.inv and b/content/docs/latest/objects.inv differ
diff --git a/content/docs/latest/searchindex.js b/content/docs/latest/searchindex.js
index de7c71539..e65f38bdc 100644
--- a/content/docs/latest/searchindex.js
+++ b/content/docs/latest/searchindex.js
@@ -1 +1 @@
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+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index", "applications/audioutils/index", "applications/audioutils/mml_parser/index", "applications/audioutils/nxaudio/index", "applications/benchmarks/cachespeed/index", "applications/benchmarks/coremark-pro/index", "applications/benchmarks/coremark/index", "applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index", "applications/benchmarks/index", "applications/benchmarks/iozone/index", "applications/bench [...]
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diff --git a/content/feed.xml b/content/feed.xml
index 355552025..78f3285f5 100644
--- a/content/feed.xml
+++ b/content/feed.xml
@@ -5,8 +5,8 @@
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<link>/</link>
<atom:link href="/feed.xml" rel="self" type="application/rss+xml"/>
- <pubDate>Mon, 11 Nov 2024 00:26:20 +0000</pubDate>
- <lastBuildDate>Mon, 11 Nov 2024 00:26:20 +0000</lastBuildDate>
+ <pubDate>Tue, 12 Nov 2024 00:25:43 +0000</pubDate>
+ <lastBuildDate>Tue, 12 Nov 2024 00:25:43 +0000</lastBuildDate>
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