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5fcd34b810
It's a thin userland wrapper around adjtime(2). It can be used to view current pending time adjustments, and root can use it to smoothly adjust the system time. As far as I can tell, other systems don't have a userland utility for this, but it seems useful. Useful enough that I'm adding it to the lagom build so I can use it on my linux box too :)
36 lines
965 B
Markdown
36 lines
965 B
Markdown
## Name
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adjtime - print remaining system clock adjustment, and optionally set it
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## Synopsis
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```sh
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adjtime [options...]
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```
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## Description
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`adjtime -s delta_seconds` will smoothly adjust the system time by slowing it
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down (if `delta_seconds` is negative) or speeding it up (if `delta_seconds` is
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positive) by a fraction of a second. The larger `delta_seconds` is, the longer
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this takes. If `delta_seconds` is set and a previous time adjustment is in
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progress, the remaining adjustment is canceled. That is, if `adjtime -s 1` is
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called, and then `adjtime -s 1` is called again later when only 0.3s of the
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first `adjtime` call have been applied yet, the clock is adjusted by 1.3
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seconds total, not by 2 seconds.
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`adjtime` also prints the remaining system clock adjustment.
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## Options
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* `-s delta_seconds`, `--set delta_seconds`: Adjust system time by
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`delta_seconds`. Must be superuser.
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## Examples
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```sh
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# adjtime -s 4.2
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4.2
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# sleep 1 && adjtime
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4.1
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```
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