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README.md
ClamAV
ClamAV® is an open source antivirus engine for detecting trojans, viruses, malware & other malicious threats.
Documentation & FAQ
Official documentation can be found online at ClamAV.net. Our source code release tarballs also includes a copy of the documentation for offline reading.
ClamAV Signatures
Anyone can learn to read and write ClamAV signatures. Take a look at the signature writing documentation and phishing signature writing documentation to get started!
Installation Instructions
Build from Source
For compile and install instructions with CMake, please see INSTALL.cmake.md. For install instructions with the (now deprecated) autotools build system, see INSTALL.autotools.md.
For additional instructions specific to building ClamAV please visit our online documentation.
Install from a binary package distribution
For binary package distribution installation instructions, head over to our website.
Install using an installer (Windows)
We provide installers to install ClamAV on Windows to "C:\Program Files". This install method will require you to have Administrator priveleges.
We also provide a "Portable Install Package" (i.e. a zip of the required files) for users that may wish to run ClamAV without installing it to a system-owned directory.
For details on how to use either option, head over to the Windows Install instructions in the User Manual.
Upgrading from a previous version
Some tips on how to upgrade from a previous version of ClamAV.
ClamAV News
For information about the features in this and prior releases, read the news.
Catch up on the latest about ClamAV by reading our blog and follow us on Twitter @clamav.
Join the ClamAV Community
The best way to get in touch with the ClamAV community is to join our mailing lists and tune to #clamav on IRC or Discord.
Want to make a contribution?
The ClamAV development team welcomes code contributions, improvements to our documentation, and also bug reports. Thanks for joining us!
Licensing
ClamAV is licensed for public/open source use under the GNU General Public License, Version 2 (GPLv2).
See COPYING.txt for a copy of the license.
3rd Party Code
ClamAV contains a number of components that include code copied in part or in whole from 3rd party projects and whose code is not owned by Cisco and which are licensed differently than ClamAV. These include:
- tomsfastmath: public domain
- LLVM: Illinois Open Source License (BSD-like)
- Yara: Apache 2.0 license
- Yara has since switched to the BSD 3-Clause License; Our source is out-of-date and needs to be updated.
- 7z / lzma: public domain
- libclamav's NSIS/NulSoft parser includes:
- zlib: permissive free software license
- bzip2 / libbzip2: BSD-like license
- OpenBSD's libc/regex: BSD license
- file: BSD license
- str.c: Contains BSD licensed modified-implementations of strtol(), stroul() functions, Copyright (c) 1990 The Regents of the University of California.
- pngcheck (png.c): MIT/X11-style license
- getopt.c: MIT license
- Curl: license inspired by MIT/X, but not identical
- libmspack: LGPL license
- UnRAR (libclamunrar): a non-free/restricted open source license
- Note: The UnRAR license is incompatible with GPLv2 because it contains a clause that prohibits reverse engineering a RAR compression algorithm from the UnRAR decompression code. For this reason, libclamunrar/libclamunrar_iface is not linked at all with libclamav. It is instead loaded at run-time. If it fails to load, ClamAV will continue running without RAR support.
See the COPYING directory for a copy of the 3rd party project licenses.