security_compute_av, security_compute_av_flags, security_compute_cre‐
ate, security_compute_create_name, security_compute_relabel, secu‐
rity_compute_member, security_compute_user, security_get_initial_con‐
text - query the SELinux policy database in the kernel
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_create_name() is identical to
security_compute_create() but also takes name of the new object in
creation as an argument. When TYPE_TRANSITION rule on the given
class and a SID pair has object name extension, we shall be able to
obtain a correct newcon according to the security policy. Note that
this interface is only supported on the linux 2.6.40 or later. In
the older kernel, the object name will be simply ignored.
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
security_get_initial_context() is used to get the context of a kernel
initial security identifier specified by namesecurity_compute_av_raw(), security_compute_av_flags_raw(),
security_compute_user_raw() and security_get_initial_context_raw()
behave identically to their non-raw counterparts but do not perform
selinux_check_access() is used to check if the source context has the
access permission for the specified class on the target context.
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
This page is part of the selinux (Security-Enhanced Linux user-space
libraries and tools) project. Information about the project can be
found at ⟨https://github.com/SELinuxProject/selinux/wiki⟩. If you
have a bug report for this manual page, see
page was obtained from the project's upstream Git repository
⟨https://github.com/SELinuxProject/selinux⟩ on 2017-03-13. If you
discover any rendering problems in this HTML version of the page, or
you believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
email@example.com 1 January 2004 security_compute_av(3)