security_compute_relabel

security_compute_av(3)	  SE Linux API documentation   security_compute_av(3)



NAME
       security_compute_av,  security_compute_create,  security_compute_rela-
       bel, security_compute_user - query the SE Linux policy database in the
       kernel.


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

       int  security_compute_av(security_context_t  scon,  security_context_t
       tcon,  security_class_t	tclass,	 access_vector_t  requested,   struct
       av_decision *avd);

       int   security_compute_create(security_context_t	 scon,	security_con-
       text_t tcon, security_class_t tclass, security_context_t *newcon);

       int  security_compute_relabel(security_context_t	 scon,	security_con-
       text_t tcon, security_class_t tclass, security_context_t *newcon);

       int  security_compute_user(security_context_t  scon, const char *user-
       name, security_context_t **con);

       int checkPasswdAccess(access_vector_t requested);


DESCRIPTION
       security_compute_av queries whether the policy permits the source con-
       text  scon to access the target context tcon via class tclass with the
       requested access vector. See the cron source for a usage example.

       security_compute_create is used to compute a context to use for label-
       ing a new object in a particular class based on a SID pair.

       security_compute_relabel	 is  used  to  compute the new context to use
       when relabeling an object, it is used in the pam_selinux.so source and
       the newrole source to determine the correct label for the tty at login
       time, but can be used for other things.

       security_compute_user is used to determine the set  of  user  contexts
       that  can  be  reached  from  a	source	context.  Is  mainly  used by
       get_ordered_context_list.

       checkPasswdAccess This functions is a helper functions that allows you
       to  check for a permission in the passwd class. checkPasswdAccess uses
       getprevcon() for the source and target security contexts.


RETURN VALUE
       0 for success and on error -1 is returned.


SEE ALSO
       getcon(3), getfilecon(3), get_ordered_context_list(3)



russell@coker.com.au		1 January 2004	       security_compute_av(3)