sediff(1)						      General Commands Manual							 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  nev-
       erallows 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 distinguish  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 <jmowery@tresys.com>.

COPYRIGHT

       Copyright(C) 2004-2007 Tresys Technology, LLC

BUGS

       Please report bugs via an email to setools-bugs@tresys.com.

SEE ALSO

       sediffx(1)

																	 sediff(1)