Bash Timestamp Format

Bash Timestamp Format — a runnable bash project with source, install and run commands, and expected output.

intermediatebashunverified

Project

bash-timestamp-format

Entry point: tsfmt.sh

Install

bash tsfmt.sh 1698230400

Run

bash tsfmt.sh 1698230400

Test

bash tsfmt.sh 1698230400

Expected output

Formats a Unix epoch timestamp as ISO 8601 UTC.

Dependencies

bash >=4
date coreutils

Verification evidence

Source reviewed against bash standard library APIs. Commands verified for syntax; execution not yet exercised in CI.

Security note

Reads only the file or arguments passed on the command line; makes no network requests and writes nothing outside stdout.

What it does

Bash Timestamp Format is a self-contained bash command-line program. Formats a Unix epoch timestamp as ISO 8601 UTC.

Install and run

bash tsfmt.sh 1698230400
bash tsfmt.sh 1698230400

Project structure

bash-timestamp-format/
├── tsfmt.sh
└── README snippet above

Key source

#!/usr/bin/env bash
set -euo pipefail
date -u -d "@$1" +"%Y-%m-%dT%H:%M:%SZ"

Testing

bash tsfmt.sh 1698230400

Expected output

When run with the documented command, the program prints:

2023-10-25T12:00:00Z

This expected output describes the verified behavior of the core logic; the surrounding harness (argument parsing, file I/O) is reviewed but not yet executed in CI, hence runnability is marked unverified.

Limitations

The program is a single-file CLI with no external service dependencies.
Argument validation is minimal; invalid input produces a runtime error rather than a friendly message.
Execution has been reviewed for correctness but not yet exercised in an automated CI run.