Figure 3: Possible values for ut_type

#define EMPTY          0
#define RUN_LVL        1   /* current run level of the system */
#define BOOT_TIME      2   /* last time that system booted */
#define OLD_TIME       3   /* login time */
#define NEW_TIME       4   /* idle time */
#define INIT_PROCESS   5   /* Process spawned by "init" */
#define LOGIN_PROCESS  6   /* A "getty" process waiting for a login */
#define USER_PROCESS   7   /* A user process */
#define DEAD_PROCESS   8   /* Process with pid is no longer active */
#define ACCOUNTING     9   /* System accounting process */
#define TSH_PROCESS    10  /* Trusted shell process */