security_compute_av(3)
NAME
security_compute_av, security_compute_create, security_compute_relabel,
security_compute_member, security_compute_user, security_get_initial_context - query the SELinux 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_context_t tcon, security_class_t tclass, security_context_t *newcon); int security_compute_relabel(security_context_t scon, security_context_t tcon, security_class_t tclass, security_context_t *newcon); int security_compute_member(security_context_t scon, security_context_t tcon, security_class_t tclass, security_context_t *newcon); int security_compute_user(security_context_t scon, const char *username, security_context_t **con); int security_get_initial_context(const char *name, security_context_t "con ); int checkPasswdAccess(access_vector_t requested);
DESCRIPTION
security_compute_av queries whether the policy permits the source context 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 labeling 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_member is used to compute the context to use when
labeling a polyinstantiated object instance.
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.
security_get_initial_context is used to get the context of a kernel
initial security identifier specified by name
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.