a.c

// gcc -lapparmor
#include <sys/apparmor.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  char *label, *mode = NULL;
  if (aa_getcon(&label, &mode) == -1) {
    perror("aa_getcon");
    exit(EXIT_FAILURE);
  }
  printf("label: %s\nmode: %s\n", label, mode);
  free(label);
  free(mode);
  return 0;
}