The following code provides a (C)Go binding for libcap-ng by Red-Hat using static linking.
The aim of the binding is to provide a Go'ish approach on using libcap-ng's API. The code is only for Linux without a support for any additional OSes.
The API itself allows to provide to 3rd party execution rights.
The examples directory provides both the usage, and the actual right attributes provided for the executable.
The aim of POSIX's libcap and libcap-ng is to provide elevated permissions for specific type of actions without becoming root, and only open it when required and turn it off after performing the call itself.
In order to bind low port number (bellow 1024) you need to become root, or use CAP_NET_BIND_SERVICE with libcap or libcap-ng.
The difference between libcap and libcap-ng is that libcap-ng is a library that provides helps for taking care of POSIX libcap in simpler manner.
Every executable binary that requires to have capabilities attributes enabled.
The way to set capabilities is to use setcap command that arrive from libcap.
$ sudo setcap CAP_ .... <executable>Without using setcap, the executable will not gain any required permission.