macOS
Homebrewverified · 100%
brew install librsynclocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install librsyncMacPorts ports tree · net/librsync/Portfile · source: api.github.com
brew
Install librsync with Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper
Library that implements the rsync remote-delta algorithm. Version 2.3.4 via Homebrew; verified from local package data.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add librsyncAlpine Linux edge package indexes · librsync · source: dl-cdn.alpinelinux.org
Debian aptverified · 92%
sudo apt install librsync-devDebian stable package indexes · librsync-dev · source: deb.debian.org
Fedora dnfverified · 92%
sudo dnf install librsyncFedora Rawhide package metadata · librsync · source: dl.fedoraproject.org
Nixverified · 92%
nix profile install nixpkgs#librsyncnixpkgs package indexes · pkgs/by-name/li/librsync/package.nix · source: api.github.com
Arch Linux pacmanverified · 92%
sudo pacman -S librsyncArch Linux sync databases · librsync · source: geo.mirror.pkgbuild.com
openSUSE zypperverified · 92%
sudo zypper install librsync-developenSUSE Tumbleweed package metadata · librsync-devel · source: download.opensuse.org
overview
Package summary
Library that implements the rsync remote-delta algorithm
Project links
Commands and aliases
- rdiff
history
Project history and usage
librsync packages the rsync remote-delta idea as a reusable C library and the rdiff command-line tool. It is historically tied to efficient file transfer, backup, and binary-patch workflows rather than to the rsync network protocol itself.
Project history
The project README credits Martin Pool and contributors from 1999 onward and says librsync was originally written for rproxy, an experiment in delta-compression for HTTP. The library exposes the core signature, delta, and patch operations so other programs can compute and apply network deltas without embedding the rsync protocol.
The modern GitHub release series shows 1.0.0 and 2.0.0 releases in 2015, with later 2.x releases continuing the library and rdiff tool as a small, reusable delta-compression component.
Adoption history
The official README lists Dropbox, rdiff-backup, Duplicity, and others as users. That adoption pattern explains librsync's packaging footprint: backup and synchronization tools depend on the library behavior while presenting their own network, metadata, and policy layers.
How it is used
Library users generate a signature of an old file, compute a delta against a new file, and apply that delta with the old file to reproduce the new file. The rdiff executable exposes the same operations for shell pipelines and package-maintainer tests.
Why package nerds care
librsync is a good example of a package that is not the famous program named in the algorithm. It deliberately does not implement the rsync wire protocol, file metadata handling, SSH transport, or directory synchronization; it packages the transferable delta primitive that higher-level tools build around.
Timeline
- 1999: Martin Pool and contributors began the code line credited in the project README.
- 2015: Version 1.0.0 was published in January and version 2.0.0 was published in November.
- 2017: Version 2.0.1 continued the post-2.0 release series.
- 2020: Version 2.3.0 was published in April.
- 2023: Version 2.3.4 was published in February.
Related projects
- Related projects include rsync, rproxy, rdiff, rdiff-backup, Duplicity, and Dropbox.
Sources
security posture
Risk level: green
library-like package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- library-like package without higher-risk signals
Signals
- metadata:library-like
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 12 platform targets.
- Installs with 1 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 |
|---|---|---|---|
rdiff | 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 version2.3.4
manager updated
local dataok
upstreamcurrent
latest detectedv2.3.4
https://github.com/librsync/librsync
- infoNo package-manager update timestamp was available.low confidence
install metadata
Package metadata
| Package key | brew:librsync |
|---|---|
| Version | 2.3.4 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/librsync |
| Homepage | https://librsync.github.io/ |
| Repository | https://github.com/librsync/librsync |
| Upstream docs | https://librsync.github.io/ |
| License | LGPL-2.1-or-later |
| Source archive | https://github.com/librsync/librsync/archive/refs/tags/v2.3.4.tar.gz |
| Dependencies | popt |
| Build dependencies | cmake |
| Bottle | available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, monterey, sonoma, ventura, 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 | librsync |
| 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%
librsync-dev 2.3.4-1.1+b1
rsync remote-delta algorithm library (development)
https://github.com/librsync/librsync
sudo apt install librsync-dev- Section: libdevel
- Architecture: amd64
- Source Package: librsync
- 2 dependencies
- normalized package name match
- Matched by: Librsync
Debian apt95%
librsync2t64 2.3.4-1.1+b1
rsync remote-delta algorithm library
https://github.com/librsync/librsync
sudo apt install librsync2t64- Section: libs
- Architecture: amd64
- Source Package: librsync
- 2 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
Debian apt95%
rdiff 2.3.4-1.1+b1
Binary diff tool for signature-based differences
https://github.com/librsync/librsync
sudo apt install rdiff- Section: utils
- Architecture: amd64
- Source Package: librsync
- 3 dependencies
- normalized package name match
- Matched by: Librsync
Nix95%
librsync
nix profile install nixpkgs#librsync- normalized package name match
- Matched by: Librsync
Ubuntu apt95%
librsync-dev 2.3.4-1.1ubuntu2
rsync remote-delta algorithm library (development)
https://github.com/librsync/librsync
sudo apt install librsync-dev- Section: libdevel
- Architecture: amd64
- Source Package: librsync
- 2 dependencies
- normalized package name match
- Matched by: Librsync
Ubuntu apt95%
librsync2t64 2.3.4-1.1ubuntu2
rsync remote-delta algorithm library
https://github.com/librsync/librsync
sudo apt install librsync2t64- Section: libs
- Architecture: amd64
- Source Package: librsync
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
Ubuntu apt95%
rdiff 2.3.4-1.1ubuntu2
Binary diff tool for signature-based differences
https://github.com/librsync/librsync
sudo apt install rdiff- Section: universe/utils
- Architecture: amd64
- Source Package: librsync
- 3 dependencies
- normalized package name match
- Matched by: Librsync
apk95%
librsync 2.3.4-r1
librsync implements the rolling-checksum algorithm of rsync
https://github.com/librsync/librsync
sudo apk add librsync- License: LGPL-2.1-or-later
- Architecture: x86_64
- Source Package: librsync
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
apk95%
librsync-dev 2.3.4-r1
librsync implements the rolling-checksum algorithm of rsync (development files)
https://github.com/librsync/librsync
sudo apk add librsync-dev- License: LGPL-2.1-or-later
- Architecture: x86_64
- Source Package: librsync
- 1 dependencies
- normalized package name match
- Matched by: Librsync
apk95%
librsync-doc 2.3.4-r1
librsync implements the rolling-checksum algorithm of rsync (documentation)
https://github.com/librsync/librsync
sudo apk add librsync-doc- License: LGPL-2.1-or-later
- Architecture: x86_64
- Source Package: librsync
- normalized package name match
- Matched by: Librsync
dnf95%
librsync 2.3.4-8.fc44
Rsync remote-delta algorithm library
sudo dnf install librsync- License: LGPL-2.1-or-later
- Category: Unspecified
- Architecture: i686
- Source Package: librsync
- 3 dependencies
- 2 provides
- normalized package name match
- Matched by: Librsync
dnf95%
librsync-devel 2.3.4-8.fc44
Headers and development libraries for librsync
sudo dnf install librsync-devel- License: LGPL-2.1-or-later
- Category: Unspecified
- Architecture: i686
- Source Package: librsync
- 2 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
dnf95%
librsync-doc 2.3.4-8.fc44
Documentation files for librsync
sudo dnf install librsync-doc- License: LGPL-2.1-or-later
- Category: Unspecified
- Architecture: noarch
- Source Package: librsync
- 1 provides
- normalized package name match
- Matched by: Librsync
pacman95%
librsync 1:2.3.4-2
Library for calculating and applying network deltas
https://github.com/librsync/librsync
sudo pacman -S librsync- License: LGPL
- Architecture: x86_64
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
zypper95%
librsync-devel 2.3.4-1.9
Development files for librsync
https://github.com/librsync/librsync
sudo zypper install librsync-devel- License: LGPL-2.1-or-later
- Category: Development/Libraries/C and C++
- Architecture: x86_64
- Source Package: librsync
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Librsync
zypper95%
librsync2 2.3.4-1.9
A Library for Generating Network Deltas
https://github.com/librsync/librsync
sudo zypper install librsync2- License: LGPL-2.1-or-later
- Category: System/Libraries
- Architecture: x86_64
- Source Package: librsync
- 2 dependencies
- 3 provides
- normalized package name match
- Matched by: Librsync
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