libfaketime ☆

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Description:
Report faked system time to programs

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: testing time development debugging simulation

Install: brew install libfaketime

About:
Libfaketime is a preloadable shared library that intercepts system calls for time retrieval. It allows users to run applications with a modified system time without changing the system clock. This is invaluable for testing time-dependent behavior in software.

Key Features:

Preloadable via LD_PRELOAD
Relative or absolute time freezing
Permissive or restrictive time filtering
Thread-safe operation

Use Cases:

Testing expiration logic in software
Simulating future or past system states
Debugging time-sensitive network protocols

Alternatives:

faketime (Ruby gem) – Ruby-specific implementation vs Libfaketime's language-agnostic C library approach

Version History

Detected	Version	Rev	Change	Commit
Sep 11, 2025 11:08am		0	VERSION_BUMP	5d4a3418
Sep 11, 2024 6:23am		0	VERSION_BUMP	ffda3f33