NAME

       selinux_set_callback - userspace SELinux callback facilities

SYNOPSIS

       #include <selinux/selinux.h>

       void selinux_set_callback(int type, union selinux_callback callback);

DESCRIPTION

       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_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) (security_context_t *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

       None.

ERRORS

       None.

AUTHOR

       Eamon Walsh <ewalsh@tycho.nsa.gov>

SEE ALSO

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

                                           20 Jun 2007                    selinux_set_callback(3)