.. zephyr:code-sample:: posix-uname
   :name: uname()

   Use ``uname()`` to acquire system information and output it to the console.

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):

cd samples/posix/uname
make -f Makefile.host

The make output file will be located in samples/posix/uname/build.

Sample Output

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