avc_has_perm_noaudit - Linux
Overview
avc_has_perm_noaudit checks whether a subject has permission to perform an action on an object, without triggering an audit event.
Syntax
avc_has_perm_noaudit <subject_context> <target_context> <permission> [flags]
Options/Flags
- -t, –type
: The type of permission check to perform. Default: ‘access’. - -s, –source: The source of the permission check. Default: ‘system’.
- -a, –action
: The action to check for. Default: ‘read’. - -p, –path
: The path to the object being checked. - –auditdenyrules: Check the denyrules as well.
Examples
Check if the current user can access a file:
avc_has_perm_noaudit $(id -u) $(stat -c '%U' /path/to/file) 'file_read'
Check if the user with UID 1000 can execute a command:
avc_has_perm_noaudit 1000 $(id -u) 'process_exec'
Common Issues
- Incorrect context: Ensure that the subject and target contexts are specified correctly.
- Permission not granted: Verify that the subject has the appropriate permissions to perform the action.
- SELinux not enabled: SELinux must be enabled for this command to work.
Integration
avc_has_perm_noaudit can be used with other SELinux utilities, such as semanage and audit2allow, to manage and enforce access control policies.
Related Commands
- getenforce: Get the current SELinux enforcement mode.
- semanage: Manage SELinux policies and roles.
- audit2allow: Generate SELinux policy rules based on audit events.