Apache NuttX is a mature, real-time embedded operating system (RTOS) https://nuttx.apache.org/
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Abhishek Mishra ab6b1fd6f9 !build: add build-time password generation with mkpasswd tool.
Introduce mkpasswd, a pure-C host tool for generating encrypted password
files at build time using TEA encryption. This enables secure,
credential-free firmware images while allowing build-time password
configuration.

Changes:
* Add mkpasswd.c host tool for TEA-based password hashing and encryption
* Integrate mkpasswd into Make build system (tools/Makefile.host)
* Add CMake support for mkpasswd compilation and ROMFS passwd generation
* Add CONFIG_BOARD_ETC_ROMFS_PASSWD_* configuration options to Kconfig
* Implement credential exclusion from defconfig to prevent password leaking
* Update savedefconfig.cmake to strip sensitive credentials
* Fix mkdir() portability for Windows Native builds (CONFIG_WINDOWS_NATIVE)
* Change default username from "admin" to "root" (POSIX convention)
* Improve build-failure error message with full menuconfig navigation path

BREAKING CHANGE: Boards enabling CONFIG_BOARD_ETC_ROMFS_PASSWD_ENABLE
must set CONFIG_BOARD_ETC_ROMFS_PASSWD_PASSWORD to a non-empty string
of at least 8 characters. The build now fails with an explicit error if
this config is left empty. To fix: run 'make menuconfig' and navigate to:
  Board Selection --->
    Auto-generate /etc/passwd at build time --->
      Admin password

Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
2026-04-14 16:06:30 +08:00
.github workflows/build.yml: job MSVC fix Filename too long 2026-04-13 23:55:10 +08:00
arch arch/xtensa/esp32: Fix ROM strdup heap issue in USER_HEAP mode 2026-04-14 09:21:17 +02:00
audio include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
binfmt include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
boards !build: add build-time password generation with mkpasswd tool. 2026-04-14 16:06:30 +08:00
cmake !build: add build-time password generation with mkpasswd tool. 2026-04-14 16:06:30 +08:00
crypto include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
Documentation documentation: Document MQTT-C with Mbed TLS usage. 2026-04-14 16:05:54 +08:00
drivers video/gc0308: implement V4L2 horizontal flip control 2026-04-10 10:47:07 +02:00
dummy
fs fs/fat: fix incorrect representation of SFN files created on Linux 2026-04-14 09:51:20 +08:00
graphics include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
include nuttx/nx: compilation error occurs 2026-04-14 13:35:26 +08:00
libs include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
mm include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
net net/route: fix return value of net_writeroute_ipv6 2026-04-13 08:46:57 -03:00
openamp openamp: Fix Make style 2026-03-23 18:16:46 -04:00
pass1 Makefile: Remove make depend files by make distclean 2026-02-16 16:27:57 +01:00
sched include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
syscall Makefile: Remove make depend files by make distclean 2026-02-16 16:27:57 +01:00
tools !build: add build-time password generation with mkpasswd tool. 2026-04-14 16:06:30 +08:00
video include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
wireless include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
.asf.yaml github: master branch protection tune. 2025-05-07 18:37:13 -05:00
.codespell-ignore-lines net/icmpv6: replace net_lock with conn_lock and conn_lock_dev 2025-12-29 09:42:18 +08:00
.codespellrc codespellrc: add ist to ignorelist 2025-10-14 17:42:01 +08:00
.editorconfig .editorconfig: fix character encoding property specification 2025-11-28 19:12:13 +08:00
.gitignore !build: add build-time password generation with mkpasswd tool. 2026-04-14 16:06:30 +08:00
.gitmessage docs/contributing: Add a commit message template 2025-06-03 17:33:24 +08:00
.pre-commit-config.yaml pre-commit: enable codespell checks 2025-05-05 12:34:39 +08:00
.yamllint
AUTHORS AUTHORS: add Donny Jiuzhu 2026-02-25 10:17:40 +01:00
CMakeLists.txt cmake: Enhance .config handling and comparison logic 2026-02-26 09:46:02 -03:00
CONTRIBUTING.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
INVIOLABLES.md
Kconfig tools/stackusage.py: use toolchain binaries instead of Python libraries 2026-03-17 11:26:44 -03:00
LICENSE style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
Makefile
NOTICE
README.md docs: Fix typos, formatting, and numbering in README.md and CONTRIBUTING.md. 2026-03-23 12:05:24 +01:00
ReleaseNotes

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Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (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()).

For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.

Getting Started

First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.

Documentation

You can find the current NuttX documentation on the Documentation Page.

Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.

The old NuttX documentation is still available in the Apache wiki.

Supported Boards

NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.

Contributing

If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.

License

The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.