Book Image

SELinux Cookbook

By : Sven Vermeulen
Book Image

SELinux Cookbook

By: Sven Vermeulen

Overview of this book

Table of Contents (17 chapters)
SELinux Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Running commands in a specified role with runcon


Using sudo is not mandatory. SELinux also provides a command called runcon that allows users to run a command in a different context. Of course, SELinux restrictions still apply—the user must have the proper privileges to execute commands with a different context.

How to do it…

Running a command using a specified role and type is done by completing the following steps:

  1. Identify the domain in which the command should run, usually by checking the executables' context and searching for the entrypoint definition:

    ~$ ls -Z auditctl
    system_u:object_r:auditctl_exec_t    auditctl
    ~$ sesearch -t auditctl_exec_t -c file -p entrypoint -A
    Found 1 semantic av rules:
      allow auditctl_t auditctl_exec_t : file { … entrypoint … };
    
  2. Call the command, passing along the role and target type:

    ~$ runcon -r secadm_r -t auditctl_t auditctl -l
    

How it works…

The runcon application tells SELinux that the invocation of the command should result in a type and role transition...