SELinux System Administration - Second Edition

Keeping or ignoring contexts

Now that we are aware that file contexts are stored as extended attributes, how do we ensure that files receive the correct label when they are written or modified? For that, a number of guidelines exist, ranging from inheritance rules to explicit commands, to set a SELinux context on a file system resource.

Inheriting the default context

By default, the SELinux security subsystem uses context inheritance to identify which context should be assigned to a file (or directory, socket, and so on) when it is created. A file created in a directory with a var_t context will be assigned the var_t context as well. This means that inheritance is based on the parent directory and not on the context of the executing process.

There ...