int vtnr_from_tty(const char *tty);
const char *default_term_for_tty(const char *tty);
-int detect_vm(const char **id);
-int detect_container(const char **id);
-int detect_virtualization(const char **id);
-
void execute_directory(const char *directory, DIR *_d, char *argv[]);
int kill_and_sigcont(pid_t pid, int sig);