selinux_set_callback(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | AUTHOR | SEE ALSO | COLOPHON

selinux_set_callback(3) SELinux API documentationselinux_set_callback(3)

NAME         top

       selinux_set_callback - userspace SELinux callback facilities

SYNOPSIS         top

       #include <selinux/selinux.h>

       void selinux_set_callback(int type, union selinux_callback
       callback);

DESCRIPTION         top

       selinux_set_callback() sets the callback indicated by type to the
       value of callback, which should be passed as a function pointer
       cast to type union selinux_callback.

       All callback functions should return a negative value with errno
       set appropriately on error.

       The available values for type are:

       SELINUX_CB_LOG
              int (*func_log) (int type, const char *fmt, ...);

              This callback is used for logging and should process the
              printf(3) style fmt string and arguments as appropriate.
              The type argument indicates the type of message and will
              be set to one of the following:

              SELINUX_ERROR

              SELINUX_WARNING

              SELINUX_INFO

              SELINUX_AVC

              SELINUX_POLICYLOAD

              SELINUX_SETENFORCE

              SELINUX_ERROR, SELINUX_WARNING, and SELINUX_INFO indicate
              standard log severity levels and are not auditable
              messages.

              The SELINUX_AVC, SELINUX_POLICYLOAD, and
              SELINUX_SETENFORCE message types can be audited with
              AUDIT_USER_AVC, AUDIT_USER_MAC_POLICY_LOAD, and
              AUDIT_USER_MAC_STATUS values from libaudit, respectively.
              If they are not audited, SELINUX_AVC should be considered
              equivalent to SELINUX_ERROR; similarly, SELINUX_POLICYLOAD
              and SELINUX_SETENFORCE should be considered equivalent to
              SELINUX_INFO.

       SELINUX_CB_AUDIT
              int (*func_audit) (void *auditdata, security_class_t cls,
                                 char *msgbuf, size_t msgbufsize);

              This callback is used for supplemental auditing in AVC
              messages.  The auditdata and cls arguments are the values
              passed to avc_has_perm(3).  A human-readable
              interpretation should be printed to msgbuf using no more
              than msgbufsize characters.

       SELINUX_CB_VALIDATE
              int (*func_validate) (char **ctx);

              This callback is used for context validation.  The
              callback may optionally modify the input context by
              setting the target of the ctx pointer to a new context.
              In this case, the old value should be freed with
              freecon(3).  The value of errno should be set to EINVAL to
              indicate an invalid context.

       SELINUX_CB_SETENFORCE
              int (*func_setenforce) (int enforcing);

              This callback is invoked when the system enforcing state
              changes.  The enforcing argument indicates the new value
              and is set to 1 for enforcing mode, and 0 for permissive
              mode.

       SELINUX_CB_POLICYLOAD
              int (*func_policyload) (int seqno);

              This callback is invoked when the system security policy
              is reloaded.  The seqno argument is the current sequential
              number of the policy generation in the system.

RETURN VALUE         top

       None.

ERRORS         top

       None.

AUTHOR         top

       Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO         top

       selabel_open(3), avc_init(3), avc_netlink_open(3), selinux(8)

COLOPHON         top

       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
       ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/SELinuxProject/selinux⟩ on 2021-06-20.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-06-18.)  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 to
       man-pages@man7.org

                               20 Jun 2007       selinux_set_callback(3)

Pages that refer to this page: avc_has_perm(3)avc_init(3)avc_netlink_loop(3)avc_open(3)security_compute_av(3)selabel_lookup(3)selabel_lookup_best_match(3)selabel_open(3)selabel_partial_match(3)selabel_stats(3)selinux_restorecon(3)selinux_restorecon_xattr(3)selinux_set_mapping(3)selabel_db(5)selabel_file(5)selabel_media(5)selabel_x(5)