macOS
Homebrewverified · 100%
brew install logswanlocal Homebrew formula metadata
brew
Install logswan with Homebrew, apt
Fast Web log analyzer using probabilistic data structures. Version 2.1.17 via Homebrew; verified 2026-07-02.
install
Additional install commands
Linux
Debian aptverified · 92%
sudo apt install logswanDebian stable package indexes · logswan · source: deb.debian.org
overview
Package summary
Fast Web log analyzer using probabilistic data structures
Project links
Commands and aliases
- logswan
history
Project history and usage
Logswan is a fast web-log analyzer focused on very large log files, especially API logs. It uses probabilistic data structures, including HyperLogLog counters, to keep memory use constant while estimating unique visitors.
Project history
Frederic Cambus develops Logswan as intentionally opinionated software. The README states design goals of speed, memory efficiency, and simple code, and documents deliberate constraints such as Common Log Format support and byte-level reporting without rounded units.
The official GitHub repository was created in June 2015. The project remains small and C-focused, with Jansson and libmaxminddb as key dependencies and JSON output as its primary integration surface.
Adoption history
Logswan's adoption is modest but practical: the README lists packages for OpenBSD, NetBSD, FreeBSD, Debian, Ubuntu, Void Linux, Gentoo, and Homebrew. The supplied package facts also show Homebrew, Debian, and Ubuntu entries.
The official GitHub repository shows a long-lived niche project with hundreds of stars, a small fork count, and regular releases through the 2.1.x series.
How it is used
The CLI form is `logswan [-ghv] [-d db] logfile`, with `-` accepted for standard input. Output goes to standard output as JSON, making it easy to redirect into other tools.
GeoIP lookups are optional through `-g` and `-d db`. The README documents the default GeoIP2 database directory under `${CMAKE_INSTALL_PREFIX}/share/dbip`, but this is a data-file lookup rather than a Logswan configuration file.
Why package nerds care
Logswan is interesting to package maintainers because it is a small, security-minded C tool with clear dependencies, sandboxing notes for OpenBSD pledge, optional seccomp, and deterministic JSON output. It is the opposite of a sprawling analytics stack.
Timeline
- 2015: Official GitHub repository created.
- 2021: 2.1.12 release published.
- 2025: 2.1.15 release published.
- 2026: 2.1.16 release published.
Related projects
- Logswan belongs to the family of web-log analyzers, but its README differentiates it by using HyperLogLog counters and by avoiding broad format support.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Installs with 2 runtime dependencies.
- Build metadata lists 1 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
logswan | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version2.1.17
manager updated2026-07-02
local dataok
upstreamcurrent
latest detected2.1.17
https://github.com/fcambus/logswan
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:logswan |
|---|---|
| Version | 2.1.17 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/logswan |
| Homepage | https://www.logswan.org |
| Repository | https://github.com/fcambus/logswan |
| Upstream docs | https://www.logswan.org/ |
| License | BSD-2-Clause |
| Source archive | https://github.com/fcambus/logswan/archive/refs/tags/2.1.17.tar.gz |
| Last updated | 2026-07-02T00:18:32Z |
| Pulse | updated |
| Dependencies | jansson, libmaxminddb |
| Build dependencies | cmake |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | logswan |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Debian apt95%
logswan 2.1.15-1
fast Web log analyzer using probabilistic data structures
https://github.com/fcambus/logswan
sudo apt install logswan- Section: web
- Architecture: amd64
- 3 dependencies
- normalized package name match
- Matched by: Logswan
Ubuntu apt95%
logswan 2.1.14-2
fast Web log analyzer using probabilistic data structures
https://github.com/fcambus/logswan
sudo apt install logswan- Section: universe/web
- Architecture: amd64
- 3 dependencies
- normalized package name match
- Matched by: Logswan
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment