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This patch adds support for ambient capabilities in service files. The idea with ambient capabilities is that the execed processes can run with non-root user and get some inherited capabilities, without having any need to add the capabilities to the executable file. You need at least Linux 4.3 to use ambient capabilities. SecureBit keep-caps is automatically added when you use ambient capabilities and wish to change the user. An example system service file might look like this: [Unit] Description=Service for testing caps [Service] ExecStart=/usr/bin/sleep 10000 User=nobody AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW After starting the service it has these capabilities: CapInh: 0000000000003000 CapPrm: 0000000000003000 CapEff: 0000000000003000 CapBnd: 0000003fffffffff CapAmb: 0000000000003000
systemd - System and Service Manager
Details
- General information about systemd can be found in the systemd Wiki
- Information about build requirements are provided in the README file