5.2. Generating SELinux Policy Modules: sepolicy generate
In previous versions of Red Hat Enterprise Linux, the
sepolgen or selinux-polgengui utilities were used for generating a SELinux policy. These tools have been merged to the sepolicy suite. In Red Hat Enterprise Linux 7, the sepolicy generate command is used to generate an initial SELinux policy module template.
Unlike
sepolgen, it is not necessary to run sepolicy generate as the root user. This utility also creates an RPM spec file, which can be used to build an RPM package that installs the policy package file (NAME.pp) and the interface file (NAME.if) to the correct location, provides installation of the SELinux policy into the kernel, and fixes the labeling. The setup script continues to install SELinux policy and sets up the labeling. In addition, a manual page based on the installed policy is generated using the sepolicy manpage command. [7] Finally, sepolicy generate builds and compiles the SELinux policy and the manual page into an RPM package, ready to be installed on other systems.
When
sepolicy generate is executed, the following files are produced:
NAME.te– type enforcing file- This file defines all the types and rules for a particular domain.
NAME.if– interface file- This file defines the default file context for the system. It takes the file types created in the
NAME.tefile and associates file paths to the types. Utilities, such asrestoreconandrpm, use these paths to write labels. NAME_selinux.spec– RPM spec file- This file is an RPM spec file that installs SELinux policy and sets up the labeling. This file also installs the interface file and a man page describing the policy. You can use the
sepolicy manpage -d NAMEcommand to generate the man page. NAME.sh– helper shell script- This script helps to compile, install, and fix the labeling on the system. It also generates a man page based on the installed policy, compiles, and builds an RPM package suitable to be installed on other systems.
If it is possible to generate an SELinux policy module,
sepolicy generate prints out all generated paths from the source domain to the target domain. See the sepolicy-generate(8) manual page for further information about sepolicy generate.
[7]
See Section 5.4, “Generating Manual Pages:
sepolicy manpage” for more information about sepolicy manpage.
