security_check_context − check the validity of a SELinux context
#include <selinux/selinux.h>
int security_check_context(const char *con);
int security_check_context_raw(const 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.
selinux(8)