NAME¶

security_compute_av, security_compute_av_flags, 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_av_flags(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 selinux_check_passwd_access(access_vector_t requested);

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. The decision is returned in avd.

security_compute_av_flags is identical to security_compute_av but additionally sets the flags field of avd. Currently one flag is supported: SELINUX_AVD_FLAGS_PERMISSIVE, which indicates the decision is computed on a permissive domain.

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. It 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

selinux_check_passwd_access is used to check for a permission in the passwd class. selinux_check_passwd_access uses getprevcon() for the source and target security contexts.

checkPasswdAccess is a deprecated alias of the selinux_check_passwd_access function.

RETURN VALUE¶

Returns zero on success or -1 on error.

SEE ALSO¶

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