rtc

QNX Board Support Packages8.0BSP User's GuideAMD Versal AI Edge VE2302AMDAMDARM

Set or get date from real-time clock (QNX OS)

Note:
You must be root or have the correct abilities to run this utility.

Syntax:

Update the current time based on the time from the specified clock:

rtc [options] clock_type

Runs on:

QNX OS

Options:

-l
Set hardware time to local time, not Coordinated Universal Time (UTC).
-s
Set hardware clock to current date and time.
clock_type
Use hw for hardware clock (automatically selects one based on information provided by the startup).

Description:

The rtc command gets or sets the date and time from a battery backed-up hardware clock.

If your machine has a built-in clock/calendar, you should include the following command in your startup script so QNX OS automatically reads the time when the system starts:

rtc hw

Examples:

Update the current date and time from the hardware clock:

rtc hw

Set hardware clock with current date and time:

rtc -s hw

Exit status:

0
Successful.
>0
An error occurred.
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