https://github.com/xyproto/ud

The UNIX day utility
https://github.com/xyproto/ud

c cli time unix unixday unixtime utility

Last synced: about 1 month ago
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The UNIX day utility

• Host: GitHub
• URL: https://github.com/xyproto/ud
• Owner: xyproto
• License: bsd-3-clause
• Created: 2023-07-15T13:14:02.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-08-06T22:30:24.000Z (4 months ago)
• Last Synced: 2024-10-05T15:19:04.168Z (about 2 months ago)
• Topics: c, cli, time, unix, unixday, unixtime, utility
• Language: C
• Homepage:
• Size: 30.3 KB
• Stars: 18
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# `ud`

Which UNIX day is it today? `ud` can let you know!

UNIX days are calculated from the current UNIX time, which is the number of seconds since January 1st, 1970 at 00:00:00 UTC.

UNIX day `20000` is at **2024**-10-04 (the 4th of October). It's a special day, since the next round (10000) UNIX day is `30000` at **2052**-02-20.

This README.md file was written on UNIX day `19553` (which is 2023-07-15).

### The `ud` utility can

* Output the UNIX day for today.

* Take a UNIX day and return the corresponding date.

* Take a date and return the UNIX day.

## Build

### With CMake and Make

    cmake -B build -S . && make -C build

### With gcc

    gcc -std=c18 -O2 -D_GNU_SOURCE -o ud main.c

## Install

### On Linux, using sudo

    sudo install -Dm755 ud /usr/bin/ud

### On FreeBSD, using doas

    doas install -d /usr/local/bin

    doas install -m755 ud /usr/local/bin/ud

## General info

* Version: 1.1.0

* License: BSD-3

* Authors: Alexander F. Rødseth <[email protected]> and Oliver Webb <[email protected]>