Check the validity of a selinux context
#include <selinux/selinux.h>
int security_check_context(char * con);
int security_check_context_raw(char * con);
security_check_context() returns 0 if SELinux is running and the context is valid, otherwise it returns -1.
security_check_context_raw() behaves identically to security_check_context() but does not perform context translation.