- Add man page sections '(N)' to external references, and '()' on
functions described in the same man page.
- Escape minus signs when those are expected to be used on the command
line or files.
- Mark files and variables in italic; Note headings, function names,
constants, program options and man page references in bold.
- Do not justify and hyphenate SEE ALSO section, and avoid hyphenation
on symbol names by prepending them with \%.
- Remove trailing dot from NAME section description.
- Split sections with a no-op command '.', to visually distinguish them
but to avoid introducing spurious vertical space in the formatted
output.
- Add explicit .sp commands in the SYNOPSIS section between function
prototypes, and fix space placement in function protoypes.
- Split header includes with .br (instead of the explicit or implicit
.sp) so that they are vertically contiguous.
- Add missing {} around SELINUXTYPE and POLICYTYPE variable text in
paths.
- Remove unneeded formatting commands.
- Remove spurious blank lines.
Signed-off-by: Guillem Jover <guillem@debian.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
Fix typos, or wrong function prototypes.
Signed-off-by: Guillem Jover <guillem@debian.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
for the given database object identified by its name and object class.
It is necessary to implement a feature something like the restorecon on databases.
The specfile shall be described as follows:
------------------------
#
# The specfile for database objects
# (for SE-PostgreSQL)
#
# <object class> <object name> <security context>
#
db_database * system_u:object_r:sepgsql_db_t:s0
db_schema *.pg_catalog system_u:obejct_r:sepgsql_sys_schema_t:s0
db_schema *.* system_u:object_r:sepgsql_schema_t:s0
db_table *.pg_catalog.* system_u:object_r:sepgsql_sysobj_t:s0
db_table *.*.* system_u:object_r:sepgsql_table_t:s0
------------------------
- All the characters after the '#' are ignored.
- Wildcards ('*' and '?') are available.
- It returns the first match security context.
Note that hierarchy of the namespace of database objects depends on RDBMS.
So, author of the specfile needs to write correct patterns which are suitable
for the target RDBMS. The patched selabel_*() interfaces don't have any
heuristics for the namespace hierarchy to be suitable for widespread RDBMSs.
In the case of SE-PgSQL, when we lookup an expected security context for the
'my_table' table in the 'public' schema and 'postgres' database, the caller
shall provide 'postgres.public.my_table' as a key.
In the default, it tries to read a specfile which maps database objects and security
context from the /etc/selinux/$POLICYTYPE/contexts/sepgsql_contexts.
Note that when another RDBMS uses this interface, it needs to give an explicit
SELABEL_OPT_PATH option on the selabel_open().
Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Acked-by: Eamon Walsh <ewalsh@tycho.nsa.gov>
Email: guido@trentalancia.com
Subject: Contributed manual pages for libselinux
Date: Sat, 21 Nov 2009 20:51:17 +0100
Hello Eamon !
On Fri, 2009-11-20 at 21:42 -0500, Eamon Walsh wrote:
> Hi, thanks for doing this. Some quick review below.
You are welcome, I suppose it was a boring task for many...
Thanks very much for reviewing the changes. And please accept my
apologies for not placing "[PATCH]" in the subject of the original post.
I had just subscribed to the list.
I left you cc address intact here...
> There is too much in matchpathcon(3) now. It's going to need to be
> split up into different pages, perhaps the init/fini/teardown stuff in
> one page, the lookup calls in another, and the non-matchpathcon prefixed
> calls in a third page.
>
> Also, .so manpage links are needed for all the calls here.
Yes, matchpathcon is a mess. Following your guidelines, I have now
splitted the huge and messy page in several different man pages. It's
easier to consult and easier to maintain.
The first part (page) is strictly related to _init, its variant
_init_index, _fini, matchpathcon and its variant matchpathcon_index.
Nice and concise. References are provided in the "SEE ALSO" section to
the rest.
The second page describes the auxiliary lookup calls
(matchpathcon_checkmatches) and the inode associations functions
(matchpathcon_filespec_{add,destroy,eval}). The reference section points
to the main matchpathcon page.
A third page has been created for the functions that are used to set the
flags (set_matchpathcon_flags) or to configure the behaviour of the main
matchpathcon functions (set_matchpathcon_invalidcon and
set_matchpathcon_printf).
A fourth and fifth page is devoted to functions that should never had
ended up in matchpathcon (selinux_file_context_cmp and
selinux_file_context_verify in one page and selinux_lsetfilecon_default
in another one): we do not really need to save electrons needed for new
pages...
>
>
> > * print_access_vector
> >
>
> Looks good.
No modifications.
> > * security_disable
> >
>
> See the selinux.h comments for this. It needs to be documented that
> this function can only be called at startup time.
Ok. I have stressed that now and also mentioned that after the policy
has been loaded at startup, then only "setenforce" can be used to alter
(not disable) the mode of the SELinux kernel code (for example by
placing it into "permissive" mode).
> > * security_set_boolean_list
> >
>
> a RETURN VALUE section is needed in this page, documenting at least this
> call if not the others in that page.
I have now added a "RETURN VALUE" section.
Also, to avoid confusion, I have rephrased the word "returns" in
"provides" when not strictly referring the to the return value of the
function (take for example security_get_boolean_names(), strictly
speaking the function returns an integer representing 0=success or
-1=failure, although from a conceptual point of view it also returns a
list trough modification of one of its parameters passed by reference).
Usually when an application developer looks at the "RETURN VALUE"
section it is because he/she has already planned/coded the call to the
function (and thus also the handling to parameters passed by reference)
and only needs to check for the function exit status so that it can be
handled properly at the call point.
> > * selinux_check_passwd_access
> >
>
> This is a replacement for the inconsistently named "checkPasswdAccess"
> function. So, the existing description of checkPasswdAccess should be
> moved to this function, and checkPasswdAccess should be changed to "this
> is a deprecated alias for selinux_check_passwd_access".
Yes, I have now mentioned that checkPasswdAccess is deprecated. We are
referring to file security_compute_av.3 as the description of these two
functions lives there...
By the way, it has been pointed out that this function should not
hard-code a string. I also agree with him, there is a generic constant
for such "passwd" object class, it is defined in flask.h could be used
instead of the string, thus avoiding hard-coding and also allowing to
save a few cycles and be theoretically future-proof (if ever the name
would change, say to "password", "auth-token" or anything else).
libselinux/src/checkAccess.c.orig 2009-11-21 20:07:21.000000000
libselinux/src/checkAccess.c 2009-11-21 20:08:36.000000000
@@ -13,17 +13,12 @@ int selinux_check_passwd_access(access_v
if (is_selinux_enabled() == 0)
return 0;
if (getprevcon_raw(&user_context) == 0) {
- security_class_t passwd_class;
struct av_decision avd;
int retval;
- passwd_class = string_to_security_class("passwd");
- if (passwd_class == 0)
- return 0;
-
retval = security_compute_av_raw(user_context,
user_context,
- passwd_class,
+ SECCLASS_PASSWD,
requested,
&avd);
Note that the above code, should really live in the application and not
in the selinux library. It used to be like that, then for some reason it
has been introduced. Redhat's passwd and cronie are calling the library
function and thus at the moment they rely on it. But for example,
util-linux-ng has the code in it and does not call this function, as I
believe it should be. A very minor issue anyway...
> > * selinux_init_load_policy
> >
>
> A paragraph break is needed in the DESCRIPTION section before this function.
Done. I have also added a note to the already mentioned fact that after
initial policy load, SELinux cannot be anymore disabled using calls to
security_disable(3).
> > * selinux_lsetfilecon_default
> >
>
> See notes above about the matchpathcon manpage.
Yes, separate man page now.
> > * selinux_mkload_policy
> >
>
> Looks good.
No modifications.
> > * set_selinuxmnt
> >
>
> This manpage includes two static functions that are not part of the
> libselinux API (at least, not anymore) and should be removed.
>
> Also, I'm not comfortable with the description given. Instead, use the
> comments in selinux.h, which are more accurate and verbose.
>
Please let me know if things are any better now.
I did also provide on the same day a patch for beautifying and improving
the command-line option parsing of a few utilities (a ticket had been
created by somebody). That patch provides those improvement according to
GNU-style parsing of "help" and "version" options (including long-option
variants). I think it also fixes a couple of typos here and there. Feel
free to include that patch too if you like it, so that the ticket can be
closed ! I will attach it again in another separate message: it has been
slightly modified in order to apply cleanly to the latest git snapshot.
More important, I was also thinking about fingerprinting (and
subsequently checking) the libraries with some cryptographic hash
function such as the NIST-recommended SHA2. It is beginning to be done
for security-related projects like OpenSSL, so I believe it is even more
essential for SELinux. Ever thought about anything like that ?
Best regards,
Guido
Signed-off-By: Joshua Brindle <method@manicmethod.com>
Email: dwalsh@redhat.com
Subject: Some missing man pages from libselinux
Date: Wed, 24 Sep 2008 08:57:44 -0400
We are still missing the following man pages.
Perhaps some of these functions should be removed?
selinux_users_path seems to return a bogus directory?
Also do not have _raw functions defined in man pages.
matchpathcon_checkmatches
matchpathcon_filespec_add
matchpathcon_filespec_destroy
matchpathcon_filespec_eval
matchpathcon_index
matchpathcon_init_prefix
print_access_vector
security_canonicalize_context
security_disable
security_set_boolean_list
selinux_check_passwd_access
selinux_customizable_types_path
selinux_file_context_cmp
selinux_file_context_verify
selinux_get_callback
selinux_init_load_policy
selinux_lsetfilecon_default
selinux_mkload_policy
selinux_raw_to_trans_context
selinux_trans_to_raw_context
selinux_translations_path
selinux_users_path
set_selinuxmnt
Signed-off-by: Joshua Brindle <method@manicmethod.com>
