extern gid_t util_lookup_group(struct udev *udev, const char *group);
extern int util_run_program(struct udev *udev, const char *command, char **envp,
char *result, size_t ressize, size_t *reslen);
extern gid_t util_lookup_group(struct udev *udev, const char *group);
extern int util_run_program(struct udev *udev, const char *command, char **envp,
char *result, size_t ressize, size_t *reslen);