selinux_set_mapping(3) [debian man page]

selinux_set_mapping(3)					     SELinux API documentation					    selinux_set_mapping(3)

NAME

       selinux_set_mapping - establish dynamic object class and permission mapping.

SYNOPSIS

       #include <selinux/selinux.h>

       struct security_class_mapping {
	    const char *name;
	    const char *perms[];
       };

       int selinux_set_mapping(struct security_class_mapping *map);

DESCRIPTION

       selinux_set_mapping  establishes  a mapping from a user-provided ordering of object classes and permissions to the numbers actually used by
       the loaded system policy.  Use of this function is highly preferred over the generated constants in the libselinux header  files,  as  this
       method allows the policy's class and permission values to change over time.

       After  the  mapping  is	established,  all libselinux functions that operate on class and permission values take the user-provided numbers,
       which are determined as follows:

       The map argument consists of an array of security_class_mapping structures, which must be terminated by a  structure  having  a	NULL  name
       field.	Except	for  this  last  structure, the name field should refer to the string name of an object class, and the corresponding perms
       field should refer to an array of permission bit names terminated by a NULL string.

       The object classes named in the mapping and the bit indexes of each set of permission bits named in  the  mapping  are  numbered  in  order
       starting from 1.  These numbers are the values that should be passed to subsequent libselinux calls.

RETURN VALUE

       Zero is returned on success.  On error, -1 is returned and errno is set appropriately.

ERRORS

       EINVAL One of the class or permission names requested in the mapping is not present in the loaded policy.

       ENOMEM An attempt to allocate memory failed.

EXAMPLE

	      struct security_class_mapping map[] = {
		  { "file", { "create", "unlink", "read", "write", NULL } },
		  { "socket", { "bind", NULL } },
		  { "process", { "signal", NULL } },
		  { NULL }
	      };

	      if (selinux_set_mapping(map) < 0)
		  exit(1);

       In  this  example, after the call has succeeded, classes file, socket, and process will be identified by 1, 2 and 3, respectively.  Permis-
       sions create, unlink, read, and write (for the file class) will be identified by 1, 2, 4, and 8 respectively.  Classes and permissions  not
       listed in the mapping cannot be used.

AUTHOR

       Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO

       avc_open(8), selinux(8)

								    12 Jun 2008 					    selinux_set_mapping(3)

security_class_to_string(3)				     SELinux API documentation				       security_class_to_string(3)

NAME

       security_class_to_string,   security_av_perm_to_string,	 string_to_security_class,  string_to_av_perm,	security_av_string,  mode_to_secu-
       rity_class - convert between SELinux class and permission values and string names.  print_access_vector	-  display  an	access	vector	in
       human-readable form.

SYNOPSIS

       #include <selinux/selinux.h>
       #include <selinux/flask.h>

       const char *security_class_to_string(security_class_t tclass);

       const char *security_av_perm_to_string(security_class_t tclass, access_vector_t av);

       int security_av_string(security_class_t tclass, access_vector_t av, char **result);

       security_class_t string_to_security_class(const char *name);

       security_class_t mode_to_security_class(mode_t mode);

       access_vector_t string_to_av_perm(security_class_t tclass, const char *name);

       void print_access_vector(security_class_t tclass, access_vector_t av);

DESCRIPTION

       security_class_to_string()  returns a string name for class tclass, or NULL if the class is invalid.  The returned string must not be modi-
       fied or freed.

       security_av_perm_to_string() returns a string name for the access vector bit av of class tclass, or NULL if  either  argument  is  invalid.
       The returned string must not be modified or freed.

       security_av_string() computes a full access vector string representation using tclass and av, which may have multiple bits set.	The string
       is returned in the memory pointed to by result, and should be freed by the caller using free(3).

       string_to_security_class() returns the class value corresponding to the string name name, or zero if no such class exists.

       mode_to_security_class() returns the class value corresponding to the specified mode, or zero if no such class exists.

       string_to_av_perm() returns the access vector bit corresponding to the string name name and security class tclass, or zero if no such value
       exists.

       print_access_vector() displays an access vector in human-readable form on the standard output stream.

RETURN VALUE

       security_av_string()  returns  zero on success or -1 on error with errno set appropriately.  print_access_vector() does not return a value.
       All other functions return zero or NULL on error.

ERRORS

       EINVAL A class or access vector argument is not recognized by the currently loaded policy.

       ENOMEM An attempt to allocate memory failed.

AUTHOR

       Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO

       selinux(8), getcon(3), getfilecon(3) stat(3)

								    30 Mar 2007 				       security_class_to_string(3)