sediff(1)                                                                                                              sediff(1)



NAME
       sediff - SELinux policy difference tool

SYNOPSIS
       sediff [OPTIONS] [EXPRESSION] ORIGINAL_POLICY ; MODIFIED_POLICY

DESCRIPTION
       sediff allows the user to inspect the semantic differences between two SELinux policies.

POLICY
       sediff supports loading SELinux policies in one of four formats.

       source A single text file containing policy source for versions 12 through 21. This file is usually named policy.conf.

       binary A  single file containing a monolithic kernel binary policy for versions 15 through 21. This file is usually named
              by version - for example, policy.20.

       modular
              A list of policy packages each containing a loadable policy module. The first module listed must be a base module.

       policy list
              A single text file containing all the information needed to load a policy, usually exported by  SETools  graphical
              utilities.

       Policies do not need to be the same format. If not provided sediff will print an error message and exit.

EXPRESSIONS
       The  user  may specify an expression listing the policy elements to differentiate.  If not provided, all supported policy
       elements sans neverallows are examined.

       -c, --class
              Find differences in permissions assigned to object classes and common permission sets.

       --level
              Find differences in categories authorized for MLS levels.

       --category
              Find differences in category definitions.

       -t, --type
              Find differences in attributes associated with types.

       -a, --attribute
              Find differences in types assigned to attributes.

       -r, --role
              Find differences in types authorized for roles.

       -u, --user
              Find differences in roles authorized for users.

       -b, --bool
              Find differences in the default values of booleans.

       -A, --allow
              Find differences in allow rules.

       --auditallow
              Find differences in auditallow rules.

       --dontaudit
              Find differences in dontaudit rules.

       --neverallow
              Find differences in neverallow rules.

       --type_trans
              Find differences in type_transition rules.

       --type_member
              Find differences in type_member rules.

       --type_change
              Find differences in type_change rules.

       --role_trans
              Find differences in role_transition rules.  This includes differences in the default role.

       --role_allow
              Find differences in role allow rules.

       --range_trans
              Find differences in range_transition rules.  This includes differences in the target MLS range.

OPTIONS
       -q, --quiet
              If there are no differences for elements of a given kind, suppress status output for that kind of element.

       --stats
              Print difference statistics only.

       -h, --help
              Print help information and exit.

       -V, --version
              Print version information and exit.

DIFFERENCES
       sediff categorizes differences in policy elements into one of three forms.

              added  The element exists only in the modified policy.

              removed
                     The element exists only in the original policy.

              modified
                     The element exists in both policies but its semantic meaning has changed.  For example, a class is modified
                     if one or more permissions are added or removed.

       For  all  rules with types as their source or target, two additional forms of difference are recognized.  This helps dis-
       tinguish differences due to new types from differences in rules for existing types.

              added, new type
                     The rule exists only in the modified policy; furthermore, one or more of the types in the rule do not exist
                     in the original policy.

              removed, missing type
                     The rule exists only in the original policy; furthermore, one or more of the types in the rule do not exist
                     in the modified policy.

NOTE
       Most shells interpret the semicolon as a metacharacter, thus requiring a backslash like  so:  sediff  original.policy  \;
       modified.policy

AUTHOR
       This manual page was written by Jeremy A. Mowery <jmoweryATtresys.com>.

COPYRIGHT
       Copyright(C) 2004-2007 Tresys Technology, LLC

BUGS
       Please report bugs via an email to setools-bugsATtresys.com.

SEE ALSO
       sediffx(1)



                                                                                                                       sediff(1)