This site is devoted to announcing new versions of libcap (both C and Go implementations), and sharing information about using Linux Capabilities -- an alternative to the superuser model of privilege under Linux.
Resources:
Release notes for libcap, libpsx and Go packages cap and psx.
You can read about Linux Capabilities in this OLS paper.
Serge wrote a related article for Linux Journal.
You can download libcap in the following ways:
Or browse the git managed source here.
Courtesy of GitHub, we maintain a continuous build tester for the git repository here.
Repology has a page tracking how widely adopted each version of libcap is.
We also provide a helper library for supporting POSIX semantics when libcap is used in threaded applications (linked against libpthread): libpsx.
This library can be used to support POSIX semantics for system calls not supported by the standard C libraries.
Some Go walk-through examples for manipulating privilege under Linux.
Feature requests and known issues are tracked here.
If you want to submit a patch, create a bug via the tracker, or you can directly email morgan@kernel.org an attachment formatted with git format-patch.
The Linux capability implementation is based on a defunct draft POSIX.1e specification for various UN*X security extensions
The SPDX-License-Identifier for libcap, libpsx, the cap and psx Go packages are all the same: "BSD-3-Clause OR GPL-2.0-only" . Note, pam_cap.so has its own license.