int getttyname_harder(int fd, char **r);
int get_ctty_devnr(dev_t *d);
-int get_ctty(char **r);
+int get_ctty(char **r, dev_t *_devnr);
int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
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);
+bool nulstr_contains(const char*nulstr, const char *needle);
+
#define NULSTR_FOREACH(i, l) \
for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)