получить имя пользователя и уровень SELinux для данного имени пользователя Linux  (get SELinux username and level for a given Linux username)
  
Имя (Name)
getseuserbyname - get SELinux username and level for a given
       Linux username
Синопсис (Synopsis)
#include <selinux/selinux.h>
       int getseuserbyname(const char *linuxuser, char **selinuxuser,
       char **level);
Описание (Description)
getseuserbyname() retrieves the SELinux username and security
       level associated with a given Linux username.  The SELinux
       username and security level can then be passed to other
       libselinux functions such as
       get_ordered_context_list_with_level(3) and
       get_default_context_with_level(3).
       The returned SELinux username and level should be freed by the
       caller using free.
Возвращаемое значение (Return value)
On success, 0 is returned.  On failure, -1 is returned and errno
       is set appropriately.
       The errors documented for the stat(2) system call are also
       applicable here.
Смотри также (See also)
selinux(8)