SCTD(1)

NAME
sctd - daemon to shift color temperature of the screen

SYNOPSIS
sctd [temp]
sctd version

DESCRIPTION
sctd is a lightweight daemon wrapper script around sct(1). The color temperature of the screen is increased or decreased dynamically depending on the current time of the day.

The arguments are as follows:

temp
    Optionally specify the base temperature to use. Default value: 4500.

version
    Print the version and copyright information of sctd to the standard output, then exit.

sctd expects a base temp value between 2000 and 9000 and increments or decrements it in steps of two every minute.

EXIT STATUS

EXAMPLES
Run sctd to shift the screen temperature dynamically:

    $ sctd

Run sctd with a base temperature of 2500 for a deeper red:

    $ sctd 2500

Print version and copyright information of sctd to the standard output stream and exit successfully:

    $ sctd version

SEE ALSO
sct(1)

STANDARDS
The sctd daemon is not compliant with any specification.

Where portability is paramount, do not use it.

HISTORY
The first version of the sctd daemon appeared back in May 2017 in the following Lobsters article: https://lobste.rs/s/stlowv/sctd_minimal_daemon_for_sct.

AUTHORS
-nosplit The sctd daemon was written by Aaron Bieber <abieber@openbsd.org> and further improved by Joerg Jung <jung@openbsd.org>.

CAVEATS
Since sct(1) rounds the given values in steps of 500, the sctd adjusts the screen temperature only about every 4 hours.

HOMEPAGE
https://www.umaxx.net/