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README.rst
.. _posix-uname-sample:
POSIX uname()
#############
Overview
********
In this sample application, the POSIX `uname()`_ function is used to acquire system information and
it is output to the console. Additionally, uname is added as a shell command and system information
is displayed according to the option(s) provided for the command.
Building and Running
********************
This project outputs to the console. It can be built and executed on QEMU as follows:
.. zephyr-app-commands::
:zephyr-app: samples/posix/uname
:host-os: unix
:board: qemu_x86
:goals: run
:compact:
For comparison, to build directly for your host OS if it is POSIX compliant (for ex. Linux):
.. code-block:: console
cd samples/posix/uname
make -f Makefile.host
The make output file will be located in samples/posix/uname/build.
Sample Output
=============
.. code-block:: console
Printing everything in utsname...
sysname[7]: Zephyr
nodename[7]: zephyr
release[13]: 3.5.99
version[61]: zephyr-v3.5.0-3515-g10156f5f1d9c Jan 9 2024 22:23:04
machine[4]: x86
uart:~$ uname -a
Zephyr zephyr 3.5.99 zephyr-v3.5.0-3515-g10156f5f1d9c Jan 9 2024 22:23:04 x86 qemu_x86
uart:~$ uname -smi
Zephyr x86 qemu_x86
.. _uname(): https://pubs.opengroup.org/onlinepubs/9699919799/functions/uname.html